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FFmpeg/libavcodec/vc1.c

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  1. /*

  2.  * VC-1 and WMV3 decoder

  3.  * Copyright (c) 2006-2007 Konstantin Shishkov

  4.  * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

  8.  * FFmpeg is free software; you can redistribute it and/or

  9.  * modify it under the terms of the GNU Lesser General Public

  10.  * License as published by the Free Software Foundation; either

  11.  * version 2.1 of the License, or (at your option) any later version.

  12.  *

  13.  * FFmpeg is distributed in the hope that it will be useful,

  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  16.  * Lesser General Public License for more details.

  17.  *

  18.  * You should have received a copy of the GNU Lesser General Public

  19.  * License along with FFmpeg; if not, write to the Free Software

  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  21.  *

  22.  */

  23. 

  24. /**

  25.  * @file vc1.c

  26.  * VC-1 and WMV3 decoder

  27.  *

  28.  */

  29. #include "common.h"

  30. #include "dsputil.h"

  31. #include "avcodec.h"

  32. #include "mpegvideo.h"

  33. #include "vc1data.h"

  34. #include "vc1acdata.h"

  35. 

  36. #undef NDEBUG

  37. #include <assert.h>

  38. 

  39. extern const uint32_t ff_table0_dc_lum[120][2], ff_table1_dc_lum[120][2];

  40. extern const uint32_t ff_table0_dc_chroma[120][2], ff_table1_dc_chroma[120][2];

  41. extern VLC ff_msmp4_dc_luma_vlc[2], ff_msmp4_dc_chroma_vlc[2];

  42. #define MB_INTRA_VLC_BITS 9

  43. extern VLC ff_msmp4_mb_i_vlc;

  44. extern const uint16_t ff_msmp4_mb_i_table[64][2];

  45. #define DC_VLC_BITS 9

  46. #define AC_VLC_BITS 9

  47. static const uint16_t table_mb_intra[64][2];

  48. 

  49. /** Markers used if VC-1 AP frame data */

  50. //@{

  51. enum VC1Code{

  52.     VC1_CODE_RES0       = 0x00000100,

  53.     VC1_CODE_ENDOFSEQ   = 0x0000010A,

  54.     VC1_CODE_SLICE,

  55.     VC1_CODE_FIELD,

  56.     VC1_CODE_FRAME,

  57.     VC1_CODE_ENTRYPOINT,

  58.     VC1_CODE_SEQHDR,

  59. };

  60. //@}

  61. 

  62. /** Available Profiles */

  63. //@{

  64. enum Profile {

  65.     PROFILE_SIMPLE,

  66.     PROFILE_MAIN,

  67.     PROFILE_COMPLEX, ///< TODO: WMV9 specific

  68.     PROFILE_ADVANCED

  69. };

  70. //@}

  71. 

  72. /** Sequence quantizer mode */

  73. //@{

  74. enum QuantMode {

  75.     QUANT_FRAME_IMPLICIT,    ///< Implicitly specified at frame level

  76.     QUANT_FRAME_EXPLICIT,    ///< Explicitly specified at frame level

  77.     QUANT_NON_UNIFORM,       ///< Non-uniform quant used for all frames

  78.     QUANT_UNIFORM            ///< Uniform quant used for all frames

  79. };

  80. //@}

  81. 

  82. /** Where quant can be changed */

  83. //@{

  84. enum DQProfile {

  85.     DQPROFILE_FOUR_EDGES,

  86.     DQPROFILE_DOUBLE_EDGES,

  87.     DQPROFILE_SINGLE_EDGE,

  88.     DQPROFILE_ALL_MBS

  89. };

  90. //@}

  91. 

  92. /** @name Where quant can be changed

  93.  */

  94. //@{

  95. enum DQSingleEdge {

  96.     DQSINGLE_BEDGE_LEFT,

  97.     DQSINGLE_BEDGE_TOP,

  98.     DQSINGLE_BEDGE_RIGHT,

  99.     DQSINGLE_BEDGE_BOTTOM

  100. };

  101. //@}

  102. 

  103. /** Which pair of edges is quantized with ALTPQUANT */

  104. //@{

  105. enum DQDoubleEdge {

  106.     DQDOUBLE_BEDGE_TOPLEFT,

  107.     DQDOUBLE_BEDGE_TOPRIGHT,

  108.     DQDOUBLE_BEDGE_BOTTOMRIGHT,

  109.     DQDOUBLE_BEDGE_BOTTOMLEFT

  110. };

  111. //@}

  112. 

  113. /** MV modes for P frames */

  114. //@{

  115. enum MVModes {

  116.     MV_PMODE_1MV_HPEL_BILIN,

  117.     MV_PMODE_1MV,

  118.     MV_PMODE_1MV_HPEL,

  119.     MV_PMODE_MIXED_MV,

  120.     MV_PMODE_INTENSITY_COMP

  121. };

  122. //@}

  123. 

  124. /** @name MV types for B frames */

  125. //@{

  126. enum BMVTypes {

  127.     BMV_TYPE_BACKWARD,

  128.     BMV_TYPE_FORWARD,

  129.     BMV_TYPE_INTERPOLATED

  130. };

  131. //@}

  132. 

  133. /** @name Block types for P/B frames */

  134. //@{

  135. enum TransformTypes {

  136.     TT_8X8,

  137.     TT_8X4_BOTTOM,

  138.     TT_8X4_TOP,

  139.     TT_8X4, //Both halves

  140.     TT_4X8_RIGHT,

  141.     TT_4X8_LEFT,

  142.     TT_4X8, //Both halves

  143.     TT_4X4

  144. };

  145. //@}

  146. 

  147. /** Table for conversion between TTBLK and TTMB */

  148. static const int ttblk_to_tt[3][8] = {

  149.   { TT_8X4, TT_4X8, TT_8X8, TT_4X4, TT_8X4_TOP, TT_8X4_BOTTOM, TT_4X8_RIGHT, TT_4X8_LEFT },

  150.   { TT_8X8, TT_4X8_RIGHT, TT_4X8_LEFT, TT_4X4, TT_8X4, TT_4X8, TT_8X4_BOTTOM, TT_8X4_TOP },

  151.   { TT_8X8, TT_4X8, TT_4X4, TT_8X4_BOTTOM, TT_4X8_RIGHT, TT_4X8_LEFT, TT_8X4, TT_8X4_TOP }

  152. };

  153. 

  154. static const int ttfrm_to_tt[4] = { TT_8X8, TT_8X4, TT_4X8, TT_4X4 };

  155. 

  156. /** MV P mode - the 5th element is only used for mode 1 */

  157. static const uint8_t mv_pmode_table[2][5] = {

  158.   { MV_PMODE_1MV_HPEL_BILIN, MV_PMODE_1MV, MV_PMODE_1MV_HPEL, MV_PMODE_INTENSITY_COMP, MV_PMODE_MIXED_MV },

  159.   { MV_PMODE_1MV, MV_PMODE_MIXED_MV, MV_PMODE_1MV_HPEL, MV_PMODE_INTENSITY_COMP, MV_PMODE_1MV_HPEL_BILIN }

  160. };

  161. static const uint8_t mv_pmode_table2[2][4] = {

  162.   { MV_PMODE_1MV_HPEL_BILIN, MV_PMODE_1MV, MV_PMODE_1MV_HPEL, MV_PMODE_MIXED_MV },

  163.   { MV_PMODE_1MV, MV_PMODE_MIXED_MV, MV_PMODE_1MV_HPEL, MV_PMODE_1MV_HPEL_BILIN }

  164. };

  165. 

  166. /** One more frame type */

  167. #define BI_TYPE 7

  168. 

  169. static const int fps_nr[5] = { 24, 25, 30, 50, 60 },

  170.   fps_dr[2] = { 1000, 1001 };

  171. static const uint8_t pquant_table[3][32] = {

  172.   {  /* Implicit quantizer */

  173.      0,  1,  2,  3,  4,  5,  6,  7,  8,  6,  7,  8,  9, 10, 11, 12,

  174.     13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 29, 31

  175.   },

  176.   {  /* Explicit quantizer, pquantizer uniform */

  177.      0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,

  178.     16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31

  179.   },

  180.   {  /* Explicit quantizer, pquantizer non-uniform */

  181.      0,  1,  1,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13,

  182.     14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 29, 31

  183.   }

  184. };

  185. 

  186. /** @name VC-1 VLC tables and defines

  187.  *  @todo TODO move this into the context

  188.  */

  189. //@{

  190. #define VC1_BFRACTION_VLC_BITS 7

  191. static VLC vc1_bfraction_vlc;

  192. #define VC1_IMODE_VLC_BITS 4

  193. static VLC vc1_imode_vlc;

  194. #define VC1_NORM2_VLC_BITS 3

  195. static VLC vc1_norm2_vlc;

  196. #define VC1_NORM6_VLC_BITS 9

  197. static VLC vc1_norm6_vlc;

  198. /* Could be optimized, one table only needs 8 bits */

  199. #define VC1_TTMB_VLC_BITS 9 //12

  200. static VLC vc1_ttmb_vlc[3];

  201. #define VC1_MV_DIFF_VLC_BITS 9 //15

  202. static VLC vc1_mv_diff_vlc[4];

  203. #define VC1_CBPCY_P_VLC_BITS 9 //14

  204. static VLC vc1_cbpcy_p_vlc[4];

  205. #define VC1_4MV_BLOCK_PATTERN_VLC_BITS 6

  206. static VLC vc1_4mv_block_pattern_vlc[4];

  207. #define VC1_TTBLK_VLC_BITS 5

  208. static VLC vc1_ttblk_vlc[3];

  209. #define VC1_SUBBLKPAT_VLC_BITS 6

  210. static VLC vc1_subblkpat_vlc[3];

  211. 

  212. static VLC vc1_ac_coeff_table[8];

  213. //@}

  214. 

  215. enum CodingSet {

  216.     CS_HIGH_MOT_INTRA = 0,

  217.     CS_HIGH_MOT_INTER,

  218.     CS_LOW_MOT_INTRA,

  219.     CS_LOW_MOT_INTER,

  220.     CS_MID_RATE_INTRA,

  221.     CS_MID_RATE_INTER,

  222.     CS_HIGH_RATE_INTRA,

  223.     CS_HIGH_RATE_INTER

  224. };

  225. 

  226. /** @name Overlap conditions for Advanced Profile */

  227. //@{

  228. enum COTypes {

  229.     CONDOVER_NONE = 0,

  230.     CONDOVER_ALL,

  231.     CONDOVER_SELECT

  232. };

  233. //@}

  234. 

  235. 

  236. /** The VC1 Context

  237.  * @fixme Change size wherever another size is more efficient

  238.  * Many members are only used for Advanced Profile

  239.  */

  240. typedef struct VC1Context{

  241.     MpegEncContext s;

  242. 

  243.     int bits;

  244. 

  245.     /** Simple/Main Profile sequence header */

  246.     //@{

  247.     int res_sm;           ///< reserved, 2b

  248.     int res_x8;           ///< reserved

  249.     int multires;         ///< frame-level RESPIC syntax element present

  250.     int res_fasttx;       ///< reserved, always 1

  251.     int res_transtab;     ///< reserved, always 0

  252.     int rangered;         ///< RANGEREDFRM (range reduction) syntax element present

  253.                           ///< at frame level

  254.     int res_rtm_flag;     ///< reserved, set to 1

  255.     int reserved;         ///< reserved

  256.     //@}

  257. 

  258.     /** Advanced Profile */

  259.     //@{

  260.     int level;            ///< 3bits, for Advanced/Simple Profile, provided by TS layer

  261.     int chromaformat;     ///< 2bits, 2=4:2:0, only defined

  262.     int postprocflag;     ///< Per-frame processing suggestion flag present

  263.     int broadcast;        ///< TFF/RFF present

  264.     int interlace;        ///< Progressive/interlaced (RPTFTM syntax element)

  265.     int tfcntrflag;       ///< TFCNTR present

  266.     int panscanflag;      ///< NUMPANSCANWIN, TOPLEFT{X,Y}, BOTRIGHT{X,Y} present

  267.     int extended_dmv;     ///< Additional extended dmv range at P/B frame-level

  268.     int color_prim;       ///< 8bits, chroma coordinates of the color primaries

  269.     int transfer_char;    ///< 8bits, Opto-electronic transfer characteristics

  270.     int matrix_coef;      ///< 8bits, Color primaries->YCbCr transform matrix

  271.     int hrd_param_flag;   ///< Presence of Hypothetical Reference

  272.                           ///< Decoder parameters

  273.     int psf;              ///< Progressive Segmented Frame

  274.     //@}

  275. 

  276.     /** Sequence header data for all Profiles

  277.      * TODO: choose between ints, uint8_ts and monobit flags

  278.      */

  279.     //@{

  280.     int profile;          ///< 2bits, Profile

  281.     int frmrtq_postproc;  ///< 3bits,

  282.     int bitrtq_postproc;  ///< 5bits, quantized framerate-based postprocessing strength

  283.     int fastuvmc;         ///< Rounding of qpel vector to hpel ? (not in Simple)

  284.     int extended_mv;      ///< Ext MV in P/B (not in Simple)

  285.     int dquant;           ///< How qscale varies with MBs, 2bits (not in Simple)

  286.     int vstransform;      ///< variable-size [48]x[48] transform type + info

  287.     int overlap;          ///< overlapped transforms in use

  288.     int quantizer_mode;   ///< 2bits, quantizer mode used for sequence, see QUANT_*

  289.     int finterpflag;      ///< INTERPFRM present

  290.     //@}

  291. 

  292.     /** Frame decoding info for all profiles */

  293.     //@{

  294.     uint8_t mv_mode;      ///< MV coding monde

  295.     uint8_t mv_mode2;     ///< Secondary MV coding mode (B frames)

  296.     int k_x;              ///< Number of bits for MVs (depends on MV range)

  297.     int k_y;              ///< Number of bits for MVs (depends on MV range)

  298.     int range_x, range_y; ///< MV range

  299.     uint8_t pq, altpq;    ///< Current/alternate frame quantizer scale

  300.     /** pquant parameters */

  301.     //@{

  302.     uint8_t dquantfrm;

  303.     uint8_t dqprofile;

  304.     uint8_t dqsbedge;

  305.     uint8_t dqbilevel;

  306.     //@}

  307.     /** AC coding set indexes

  308.      * @see 8.1.1.10, p(1)10

  309.      */

  310.     //@{

  311.     int c_ac_table_index; ///< Chroma index from ACFRM element

  312.     int y_ac_table_index; ///< Luma index from AC2FRM element

  313.     //@}

  314.     int ttfrm;            ///< Transform type info present at frame level

  315.     uint8_t ttmbf;        ///< Transform type flag

  316.     uint8_t ttblk4x4;     ///< Value of ttblk which indicates a 4x4 transform

  317.     int codingset;        ///< index of current table set from 11.8 to use for luma block decoding

  318.     int codingset2;       ///< index of current table set from 11.8 to use for chroma block decoding

  319.     int pqindex;          ///< raw pqindex used in coding set selection

  320.     int a_avail, c_avail;

  321.     uint8_t *mb_type_base, *mb_type[3];

  322. 

  323. 

  324.     /** Luma compensation parameters */

  325.     //@{

  326.     uint8_t lumscale;

  327.     uint8_t lumshift;

  328.     //@}

  329.     int16_t bfraction;    ///< Relative position % anchors=> how to scale MVs

  330.     uint8_t halfpq;       ///< Uniform quant over image and qp+.5

  331.     uint8_t respic;       ///< Frame-level flag for resized images

  332.     int buffer_fullness;  ///< HRD info

  333.     /** Ranges:

  334.      * -# 0 -> [-64n 63.f] x [-32, 31.f]

  335.      * -# 1 -> [-128, 127.f] x [-64, 63.f]

  336.      * -# 2 -> [-512, 511.f] x [-128, 127.f]

  337.      * -# 3 -> [-1024, 1023.f] x [-256, 255.f]

  338.      */

  339.     uint8_t mvrange;

  340.     uint8_t pquantizer;           ///< Uniform (over sequence) quantizer in use

  341.     VLC *cbpcy_vlc;               ///< CBPCY VLC table

  342.     int tt_index;                 ///< Index for Transform Type tables

  343.     uint8_t* mv_type_mb_plane;    ///< bitplane for mv_type == (4MV)

  344.     uint8_t* direct_mb_plane;     ///< bitplane for "direct" MBs

  345.     int mv_type_is_raw;           ///< mv type mb plane is not coded

  346.     int dmb_is_raw;               ///< direct mb plane is raw

  347.     int skip_is_raw;              ///< skip mb plane is not coded

  348.     uint8_t luty[256], lutuv[256]; // lookup tables used for intensity compensation

  349.     int use_ic;                   ///< use intensity compensation in B-frames

  350.     int rnd;                      ///< rounding control

  351. 

  352.     /** Frame decoding info for S/M profiles only */

  353.     //@{

  354.     uint8_t rangeredfrm; ///< out_sample = CLIP((in_sample-128)*2+128)

  355.     uint8_t interpfrm;

  356.     //@}

  357. 

  358.     /** Frame decoding info for Advanced profile */

  359.     //@{

  360.     uint8_t fcm; ///< 0->Progressive, 2->Frame-Interlace, 3->Field-Interlace

  361.     uint8_t numpanscanwin;

  362.     uint8_t tfcntr;

  363.     uint8_t rptfrm, tff, rff;

  364.     uint16_t topleftx;

  365.     uint16_t toplefty;

  366.     uint16_t bottomrightx;

  367.     uint16_t bottomrighty;

  368.     uint8_t uvsamp;

  369.     uint8_t postproc;

  370.     int hrd_num_leaky_buckets;

  371.     uint8_t bit_rate_exponent;

  372.     uint8_t buffer_size_exponent;

  373.     uint8_t* acpred_plane;       ///< AC prediction flags bitplane

  374.     int acpred_is_raw;

  375.     uint8_t* over_flags_plane;   ///< Overflags bitplane

  376.     int overflg_is_raw;

  377.     uint8_t condover;

  378.     uint16_t *hrd_rate, *hrd_buffer;

  379.     uint8_t *hrd_fullness;

  380.     uint8_t range_mapy_flag;

  381.     uint8_t range_mapuv_flag;

  382.     uint8_t range_mapy;

  383.     uint8_t range_mapuv;

  384.     //@}

  385. 

  386.     int p_frame_skipped;

  387.     int bi_type;

  388. } VC1Context;

  389. 

  390. /**

  391.  * Get unary code of limited length

  392.  * @fixme FIXME Slow and ugly

  393.  * @param gb GetBitContext

  394.  * @param[in] stop The bitstop value (unary code of 1's or 0's)

  395.  * @param[in] len Maximum length

  396.  * @return Unary length/index

  397.  */

  398. static int get_prefix(GetBitContext *gb, int stop, int len)

  399. {

  400. #if 1

  401.     int i;

  402. 

  403.     for(i = 0; i < len && get_bits1(gb) != stop; i++);

  404.     return i;

  405. /*  int i = 0, tmp = !stop;

  406. 

  407.   while (i != len && tmp != stop)

  408.   {

  409.     tmp = get_bits(gb, 1);

  410.     i++;

  411.   }

  412.   if (i == len && tmp != stop) return len+1;

  413.   return i;*/

  414. #else

  415.   unsigned int buf;

  416.   int log;

  417. 

  418.   OPEN_READER(re, gb);

  419.   UPDATE_CACHE(re, gb);

  420.   buf=GET_CACHE(re, gb); //Still not sure

  421.   if (stop) buf = ~buf;

  422. 

  423.   log= av_log2(-buf); //FIXME: -?

  424.   if (log < limit){

  425.     LAST_SKIP_BITS(re, gb, log+1);

  426.     CLOSE_READER(re, gb);

  427.     return log;

  428.   }

  429. 

  430.   LAST_SKIP_BITS(re, gb, limit);

  431.   CLOSE_READER(re, gb);

  432.   return limit;

  433. #endif

  434. }

  435. 

  436. static inline int decode210(GetBitContext *gb){

  437.     int n;

  438.     n = get_bits1(gb);

  439.     if (n == 1)

  440.         return 0;

  441.     else

  442.         return 2 - get_bits1(gb);

  443. }

  444. 

  445. /**

  446.  * Init VC-1 specific tables and VC1Context members

  447.  * @param v The VC1Context to initialize

  448.  * @return Status

  449.  */

  450. static int vc1_init_common(VC1Context *v)

  451. {

  452.     static int done = 0;

  453.     int i = 0;

  454. 

  455.     v->hrd_rate = v->hrd_buffer = NULL;

  456. 

  457.     /* VLC tables */

  458.     if(!done)

  459.     {

  460.         done = 1;

  461.         init_vlc(&vc1_bfraction_vlc, VC1_BFRACTION_VLC_BITS, 23,

  462.                  vc1_bfraction_bits, 1, 1,

  463.                  vc1_bfraction_codes, 1, 1, 1);

  464.         init_vlc(&vc1_norm2_vlc, VC1_NORM2_VLC_BITS, 4,

  465.                  vc1_norm2_bits, 1, 1,

  466.                  vc1_norm2_codes, 1, 1, 1);

  467.         init_vlc(&vc1_norm6_vlc, VC1_NORM6_VLC_BITS, 64,

  468.                  vc1_norm6_bits, 1, 1,

  469.                  vc1_norm6_codes, 2, 2, 1);

  470.         init_vlc(&vc1_imode_vlc, VC1_IMODE_VLC_BITS, 7,

  471.                  vc1_imode_bits, 1, 1,

  472.                  vc1_imode_codes, 1, 1, 1);

  473.         for (i=0; i<3; i++)

  474.         {

  475.             init_vlc(&vc1_ttmb_vlc[i], VC1_TTMB_VLC_BITS, 16,

  476.                      vc1_ttmb_bits[i], 1, 1,

  477.                      vc1_ttmb_codes[i], 2, 2, 1);

  478.             init_vlc(&vc1_ttblk_vlc[i], VC1_TTBLK_VLC_BITS, 8,

  479.                      vc1_ttblk_bits[i], 1, 1,

  480.                      vc1_ttblk_codes[i], 1, 1, 1);

  481.             init_vlc(&vc1_subblkpat_vlc[i], VC1_SUBBLKPAT_VLC_BITS, 15,

  482.                      vc1_subblkpat_bits[i], 1, 1,

  483.                      vc1_subblkpat_codes[i], 1, 1, 1);

  484.         }

  485.         for(i=0; i<4; i++)

  486.         {

  487.             init_vlc(&vc1_4mv_block_pattern_vlc[i], VC1_4MV_BLOCK_PATTERN_VLC_BITS, 16,

  488.                      vc1_4mv_block_pattern_bits[i], 1, 1,

  489.                      vc1_4mv_block_pattern_codes[i], 1, 1, 1);

  490.             init_vlc(&vc1_cbpcy_p_vlc[i], VC1_CBPCY_P_VLC_BITS, 64,

  491.                      vc1_cbpcy_p_bits[i], 1, 1,

  492.                      vc1_cbpcy_p_codes[i], 2, 2, 1);

  493.             init_vlc(&vc1_mv_diff_vlc[i], VC1_MV_DIFF_VLC_BITS, 73,

  494.                      vc1_mv_diff_bits[i], 1, 1,

  495.                      vc1_mv_diff_codes[i], 2, 2, 1);

  496.         }

  497.         for(i=0; i<8; i++)

  498.             init_vlc(&vc1_ac_coeff_table[i], AC_VLC_BITS, vc1_ac_sizes[i],

  499.                      &vc1_ac_tables[i][0][1], 8, 4,

  500.                      &vc1_ac_tables[i][0][0], 8, 4, 1);

  501.         init_vlc(&ff_msmp4_mb_i_vlc, MB_INTRA_VLC_BITS, 64,

  502.                  &ff_msmp4_mb_i_table[0][1], 4, 2,

  503.                  &ff_msmp4_mb_i_table[0][0], 4, 2, 1);

  504.     }

  505. 

  506.     /* Other defaults */

  507.     v->pq = -1;

  508.     v->mvrange = 0; /* 7.1.1.18, p80 */

  509. 

  510.     return 0;

  511. }

  512. 

  513. /***********************************************************************/

  514. /**

  515.  * @defgroup bitplane VC9 Bitplane decoding

  516.  * @see 8.7, p56

  517.  * @{

  518.  */

  519. 

  520. /** @addtogroup bitplane

  521.  * Imode types

  522.  * @{

  523.  */

  524. enum Imode {

  525.     IMODE_RAW,

  526.     IMODE_NORM2,

  527.     IMODE_DIFF2,

  528.     IMODE_NORM6,

  529.     IMODE_DIFF6,

  530.     IMODE_ROWSKIP,

  531.     IMODE_COLSKIP

  532. };

  533. /** @} */ //imode defines

  534. 

  535. /** Decode rows by checking if they are skipped

  536.  * @param plane Buffer to store decoded bits

  537.  * @param[in] width Width of this buffer

  538.  * @param[in] height Height of this buffer

  539.  * @param[in] stride of this buffer

  540.  */

  541. static void decode_rowskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){

  542.     int x, y;

  543. 

  544.     for (y=0; y<height; y++){

  545.         if (!get_bits(gb, 1)) //rowskip

  546.             memset(plane, 0, width);

  547.         else

  548.             for (x=0; x<width; x++)

  549.                 plane[x] = get_bits(gb, 1);

  550.         plane += stride;

  551.     }

  552. }

  553. 

  554. /** Decode columns by checking if they are skipped

  555.  * @param plane Buffer to store decoded bits

  556.  * @param[in] width Width of this buffer

  557.  * @param[in] height Height of this buffer

  558.  * @param[in] stride of this buffer

  559.  * @fixme FIXME: Optimize

  560.  */

  561. static void decode_colskip(uint8_t* plane, int width, int height, int stride, GetBitContext *gb){

  562.     int x, y;

  563. 

  564.     for (x=0; x<width; x++){

  565.         if (!get_bits(gb, 1)) //colskip

  566.             for (y=0; y<height; y++)

  567.                 plane[y*stride] = 0;

  568.         else

  569.             for (y=0; y<height; y++)

  570.                 plane[y*stride] = get_bits(gb, 1);

  571.         plane ++;

  572.     }

  573. }

  574. 

  575. /** Decode a bitplane's bits

  576.  * @param bp Bitplane where to store the decode bits

  577.  * @param v VC-1 context for bit reading and logging

  578.  * @return Status

  579.  * @fixme FIXME: Optimize

  580.  */

  581. static int bitplane_decoding(uint8_t* data, int *raw_flag, VC1Context *v)

  582. {

  583.     GetBitContext *gb = &v->s.gb;

  584. 

  585.     int imode, x, y, code, offset;

  586.     uint8_t invert, *planep = data;

  587.     int width, height, stride;

  588. 

  589.     width = v->s.mb_width;

  590.     height = v->s.mb_height;

  591.     stride = v->s.mb_stride;

  592.     invert = get_bits(gb, 1);

  593.     imode = get_vlc2(gb, vc1_imode_vlc.table, VC1_IMODE_VLC_BITS, 1);

  594. 

  595.     *raw_flag = 0;

  596.     switch (imode)

  597.     {

  598.     case IMODE_RAW:

  599.         //Data is actually read in the MB layer (same for all tests == "raw")

  600.         *raw_flag = 1; //invert ignored

  601.         return invert;

  602.     case IMODE_DIFF2:

  603.     case IMODE_NORM2:

  604.         if ((height * width) & 1)

  605.         {

  606.             *planep++ = get_bits(gb, 1);

  607.             offset = 1;

  608.         }

  609.         else offset = 0;

  610.         // decode bitplane as one long line

  611.         for (y = offset; y < height * width; y += 2) {

  612.             code = get_vlc2(gb, vc1_norm2_vlc.table, VC1_NORM2_VLC_BITS, 1);

  613.             *planep++ = code & 1;

  614.             offset++;

  615.             if(offset == width) {

  616.                 offset = 0;

  617.                 planep += stride - width;

  618.             }

  619.             *planep++ = code >> 1;

  620.             offset++;

  621.             if(offset == width) {

  622.                 offset = 0;

  623.                 planep += stride - width;

  624.             }

  625.         }

  626.         break;

  627.     case IMODE_DIFF6:

  628.     case IMODE_NORM6:

  629.         if(!(height % 3) && (width % 3)) { // use 2x3 decoding

  630.             for(y = 0; y < height; y+= 3) {

  631.                 for(x = width & 1; x < width; x += 2) {

  632.                     code = get_vlc2(gb, vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);

  633.                     if(code < 0){

  634.                         av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");

  635.                         return -1;

  636.                     }

  637.                     planep[x + 0] = (code >> 0) & 1;

  638.                     planep[x + 1] = (code >> 1) & 1;

  639.                     planep[x + 0 + stride] = (code >> 2) & 1;

  640.                     planep[x + 1 + stride] = (code >> 3) & 1;

  641.                     planep[x + 0 + stride * 2] = (code >> 4) & 1;

  642.                     planep[x + 1 + stride * 2] = (code >> 5) & 1;

  643.                 }

  644.                 planep += stride * 3;

  645.             }

  646.             if(width & 1) decode_colskip(data, 1, height, stride, &v->s.gb);

  647.         } else { // 3x2

  648.             planep += (height & 1) * stride;

  649.             for(y = height & 1; y < height; y += 2) {

  650.                 for(x = width % 3; x < width; x += 3) {

  651.                     code = get_vlc2(gb, vc1_norm6_vlc.table, VC1_NORM6_VLC_BITS, 2);

  652.                     if(code < 0){

  653.                         av_log(v->s.avctx, AV_LOG_DEBUG, "invalid NORM-6 VLC\n");

  654.                         return -1;

  655.                     }

  656.                     planep[x + 0] = (code >> 0) & 1;

  657.                     planep[x + 1] = (code >> 1) & 1;

  658.                     planep[x + 2] = (code >> 2) & 1;

  659.                     planep[x + 0 + stride] = (code >> 3) & 1;

  660.                     planep[x + 1 + stride] = (code >> 4) & 1;

  661.                     planep[x + 2 + stride] = (code >> 5) & 1;

  662.                 }

  663.                 planep += stride * 2;

  664.             }

  665.             x = width % 3;

  666.             if(x) decode_colskip(data  ,             x, height    , stride, &v->s.gb);

  667.             if(height & 1) decode_rowskip(data+x, width - x, 1, stride, &v->s.gb);

  668.         }

  669.         break;

  670.     case IMODE_ROWSKIP:

  671.         decode_rowskip(data, width, height, stride, &v->s.gb);

  672.         break;

  673.     case IMODE_COLSKIP:

  674.         decode_colskip(data, width, height, stride, &v->s.gb);

  675.         break;

  676.     default: break;

  677.     }

  678. 

  679.     /* Applying diff operator */

  680.     if (imode == IMODE_DIFF2 || imode == IMODE_DIFF6)

  681.     {

  682.         planep = data;

  683.         planep[0] ^= invert;

  684.         for (x=1; x<width; x++)

  685.             planep[x] ^= planep[x-1];

  686.         for (y=1; y<height; y++)

  687.         {

  688.             planep += stride;

  689.             planep[0] ^= planep[-stride];

  690.             for (x=1; x<width; x++)

  691.             {

  692.                 if (planep[x-1] != planep[x-stride]) planep[x] ^= invert;

  693.                 else                                 planep[x] ^= planep[x-1];

  694.             }

  695.         }

  696.     }

  697.     else if (invert)

  698.     {

  699.         planep = data;

  700.         for (x=0; x<stride*height; x++) planep[x] = !planep[x]; //FIXME stride

  701.     }

  702.     return (imode<<1) + invert;

  703. }

  704. 

  705. /** @} */ //Bitplane group

  706. 

  707. /***********************************************************************/

  708. /** VOP Dquant decoding

  709.  * @param v VC-1 Context

  710.  */

  711. static int vop_dquant_decoding(VC1Context *v)

  712. {

  713.     GetBitContext *gb = &v->s.gb;

  714.     int pqdiff;

  715. 

  716.     //variable size

  717.     if (v->dquant == 2)

  718.     {

  719.         pqdiff = get_bits(gb, 3);

  720.         if (pqdiff == 7) v->altpq = get_bits(gb, 5);

  721.         else v->altpq = v->pq + pqdiff + 1;

  722.     }

  723.     else

  724.     {

  725.         v->dquantfrm = get_bits(gb, 1);

  726.         if ( v->dquantfrm )

  727.         {

  728.             v->dqprofile = get_bits(gb, 2);

  729.             switch (v->dqprofile)

  730.             {

  731.             case DQPROFILE_SINGLE_EDGE:

  732.             case DQPROFILE_DOUBLE_EDGES:

  733.                 v->dqsbedge = get_bits(gb, 2);

  734.                 break;

  735.             case DQPROFILE_ALL_MBS:

  736.                 v->dqbilevel = get_bits(gb, 1);

  737.             default: break; //Forbidden ?

  738.             }

  739.             if (v->dqbilevel || v->dqprofile != DQPROFILE_ALL_MBS)

  740.             {

  741.                 pqdiff = get_bits(gb, 3);

  742.                 if (pqdiff == 7) v->altpq = get_bits(gb, 5);

  743.                 else v->altpq = v->pq + pqdiff + 1;

  744.             }

  745.         }

  746.     }

  747.     return 0;

  748. }

  749. 

  750. /** Put block onto picture

  751.  */

  752. static void vc1_put_block(VC1Context *v, DCTELEM block[6][64])

  753. {

  754.     uint8_t *Y;

  755.     int ys, us, vs;

  756.     DSPContext *dsp = &v->s.dsp;

  757. 

  758.     if(v->rangeredfrm) {

  759.         int i, j, k;

  760.         for(k = 0; k < 6; k++)

  761.             for(j = 0; j < 8; j++)

  762.                 for(i = 0; i < 8; i++)

  763.                     block[k][i + j*8] = ((block[k][i + j*8] - 128) << 1) + 128;

  764. 

  765.     }

  766.     ys = v->s.current_picture.linesize[0];

  767.     us = v->s.current_picture.linesize[1];

  768.     vs = v->s.current_picture.linesize[2];

  769.     Y = v->s.dest[0];

  770. 

  771.     dsp->put_pixels_clamped(block[0], Y, ys);

  772.     dsp->put_pixels_clamped(block[1], Y + 8, ys);

  773.     Y += ys * 8;

  774.     dsp->put_pixels_clamped(block[2], Y, ys);

  775.     dsp->put_pixels_clamped(block[3], Y + 8, ys);

  776. 

  777.     if(!(v->s.flags & CODEC_FLAG_GRAY)) {

  778.         dsp->put_pixels_clamped(block[4], v->s.dest[1], us);

  779.         dsp->put_pixels_clamped(block[5], v->s.dest[2], vs);

  780.     }

  781. }

  782. 

  783. /** Do motion compensation over 1 macroblock

  784.  * Mostly adapted hpel_motion and qpel_motion from mpegvideo.c

  785.  */

  786. static void vc1_mc_1mv(VC1Context *v, int dir)

  787. {

  788.     MpegEncContext *s = &v->s;

  789.     DSPContext *dsp = &v->s.dsp;

  790.     uint8_t *srcY, *srcU, *srcV;

  791.     int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;

  792. 

  793.     if(!v->s.last_picture.data[0])return;

  794. 

  795.     mx = s->mv[dir][0][0];

  796.     my = s->mv[dir][0][1];

  797. 

  798.     // store motion vectors for further use in B frames

  799.     if(s->pict_type == P_TYPE) {

  800.         s->current_picture.motion_val[1][s->block_index[0]][0] = mx;

  801.         s->current_picture.motion_val[1][s->block_index[0]][1] = my;

  802.     }

  803.     uvmx = (mx + ((mx & 3) == 3)) >> 1;

  804.     uvmy = (my + ((my & 3) == 3)) >> 1;

  805.     if(v->fastuvmc) {

  806.         uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));

  807.         uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));

  808.     }

  809.     if(!dir) {

  810.         srcY = s->last_picture.data[0];

  811.         srcU = s->last_picture.data[1];

  812.         srcV = s->last_picture.data[2];

  813.     } else {

  814.         srcY = s->next_picture.data[0];

  815.         srcU = s->next_picture.data[1];

  816.         srcV = s->next_picture.data[2];

  817.     }

  818. 

  819.     src_x = s->mb_x * 16 + (mx >> 2);

  820.     src_y = s->mb_y * 16 + (my >> 2);

  821.     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);

  822.     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);

  823. 

  824.     if(v->profile != PROFILE_ADVANCED){

  825.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  826.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  827.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  828.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  829.     }else{

  830.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  831.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  832.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  833.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  834.     }

  835. 

  836.     srcY += src_y * s->linesize + src_x;

  837.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  838.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  839. 

  840.     /* for grayscale we should not try to read from unknown area */

  841.     if(s->flags & CODEC_FLAG_GRAY) {

  842.         srcU = s->edge_emu_buffer + 18 * s->linesize;

  843.         srcV = s->edge_emu_buffer + 18 * s->linesize;

  844.     }

  845. 

  846.     if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  847.        || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 16 - s->mspel*3

  848.        || (unsigned)(src_y - s->mspel) > s->v_edge_pos - (my&3) - 16 - s->mspel*3){

  849.         uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;

  850. 

  851.         srcY -= s->mspel * (1 + s->linesize);

  852.         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,

  853.                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);

  854.         srcY = s->edge_emu_buffer;

  855.         ff_emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8+1, 8+1,

  856.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  857.         ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,

  858.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  859.         srcU = uvbuf;

  860.         srcV = uvbuf + 16;

  861.         /* if we deal with range reduction we need to scale source blocks */

  862.         if(v->rangeredfrm) {

  863.             int i, j;

  864.             uint8_t *src, *src2;

  865. 

  866.             src = srcY;

  867.             for(j = 0; j < 17 + s->mspel*2; j++) {

  868.                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;

  869.                 src += s->linesize;

  870.             }

  871.             src = srcU; src2 = srcV;

  872.             for(j = 0; j < 9; j++) {

  873.                 for(i = 0; i < 9; i++) {

  874.                     src[i] = ((src[i] - 128) >> 1) + 128;

  875.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  876.                 }

  877.                 src += s->uvlinesize;

  878.                 src2 += s->uvlinesize;

  879.             }

  880.         }

  881.         /* if we deal with intensity compensation we need to scale source blocks */

  882.         if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  883.             int i, j;

  884.             uint8_t *src, *src2;

  885. 

  886.             src = srcY;

  887.             for(j = 0; j < 17 + s->mspel*2; j++) {

  888.                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = v->luty[src[i]];

  889.                 src += s->linesize;

  890.             }

  891.             src = srcU; src2 = srcV;

  892.             for(j = 0; j < 9; j++) {

  893.                 for(i = 0; i < 9; i++) {

  894.                     src[i] = v->lutuv[src[i]];

  895.                     src2[i] = v->lutuv[src2[i]];

  896.                 }

  897.                 src += s->uvlinesize;

  898.                 src2 += s->uvlinesize;

  899.             }

  900.         }

  901.         srcY += s->mspel * (1 + s->linesize);

  902.     }

  903. 

  904.     if(s->mspel) {

  905.         dxy = ((my & 3) << 2) | (mx & 3);

  906.         dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0]    , srcY    , s->linesize, v->rnd);

  907.         dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8, srcY + 8, s->linesize, v->rnd);

  908.         srcY += s->linesize * 8;

  909.         dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize    , srcY    , s->linesize, v->rnd);

  910.         dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + 8 * s->linesize + 8, srcY + 8, s->linesize, v->rnd);

  911.     } else { // hpel mc - always used for luma

  912.         dxy = (my & 2) | ((mx & 2) >> 1);

  913. 

  914.         if(!v->rnd)

  915.             dsp->put_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  916.         else

  917.             dsp->put_no_rnd_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  918.     }

  919. 

  920.     if(s->flags & CODEC_FLAG_GRAY) return;

  921.     /* Chroma MC always uses qpel bilinear */

  922.     uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);

  923.     uvmx = (uvmx&3)<<1;

  924.     uvmy = (uvmy&3)<<1;

  925.     if(!v->rnd){

  926.         dsp->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  927.         dsp->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  928.     }else{

  929.         dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  930.         dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  931.     }

  932. }

  933. 

  934. /** Do motion compensation for 4-MV macroblock - luminance block

  935.  */

  936. static void vc1_mc_4mv_luma(VC1Context *v, int n)

  937. {

  938.     MpegEncContext *s = &v->s;

  939.     DSPContext *dsp = &v->s.dsp;

  940.     uint8_t *srcY;

  941.     int dxy, mx, my, src_x, src_y;

  942.     int off;

  943. 

  944.     if(!v->s.last_picture.data[0])return;

  945.     mx = s->mv[0][n][0];

  946.     my = s->mv[0][n][1];

  947.     srcY = s->last_picture.data[0];

  948. 

  949.     off = s->linesize * 4 * (n&2) + (n&1) * 8;

  950. 

  951.     src_x = s->mb_x * 16 + (n&1) * 8 + (mx >> 2);

  952.     src_y = s->mb_y * 16 + (n&2) * 4 + (my >> 2);

  953. 

  954.     if(v->profile != PROFILE_ADVANCED){

  955.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  956.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  957.     }else{

  958.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  959.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  960.     }

  961. 

  962.     srcY += src_y * s->linesize + src_x;

  963. 

  964.     if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  965.        || (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 8 - s->mspel*2

  966.        || (unsigned)(src_y - s->mspel) > s->v_edge_pos - (my&3) - 8 - s->mspel*2){

  967.         srcY -= s->mspel * (1 + s->linesize);

  968.         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 9+s->mspel*2, 9+s->mspel*2,

  969.                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);

  970.         srcY = s->edge_emu_buffer;

  971.         /* if we deal with range reduction we need to scale source blocks */

  972.         if(v->rangeredfrm) {

  973.             int i, j;

  974.             uint8_t *src;

  975. 

  976.             src = srcY;

  977.             for(j = 0; j < 9 + s->mspel*2; j++) {

  978.                 for(i = 0; i < 9 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;

  979.                 src += s->linesize;

  980.             }

  981.         }

  982.         /* if we deal with intensity compensation we need to scale source blocks */

  983.         if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  984.             int i, j;

  985.             uint8_t *src;

  986. 

  987.             src = srcY;

  988.             for(j = 0; j < 9 + s->mspel*2; j++) {

  989.                 for(i = 0; i < 9 + s->mspel*2; i++) src[i] = v->luty[src[i]];

  990.                 src += s->linesize;

  991.             }

  992.         }

  993.         srcY += s->mspel * (1 + s->linesize);

  994.     }

  995. 

  996.     if(s->mspel) {

  997.         dxy = ((my & 3) << 2) | (mx & 3);

  998.         dsp->put_vc1_mspel_pixels_tab[dxy](s->dest[0] + off, srcY, s->linesize, v->rnd);

  999.     } else { // hpel mc - always used for luma

  1000.         dxy = (my & 2) | ((mx & 2) >> 1);

  1001.         if(!v->rnd)

  1002.             dsp->put_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);

  1003.         else

  1004.             dsp->put_no_rnd_pixels_tab[1][dxy](s->dest[0] + off, srcY, s->linesize, 8);

  1005.     }

  1006. }

  1007. 

  1008. static inline int median4(int a, int b, int c, int d)

  1009. {

  1010.     if(a < b) {

  1011.         if(c < d) return (FFMIN(b, d) + FFMAX(a, c)) / 2;

  1012.         else      return (FFMIN(b, c) + FFMAX(a, d)) / 2;

  1013.     } else {

  1014.         if(c < d) return (FFMIN(a, d) + FFMAX(b, c)) / 2;

  1015.         else      return (FFMIN(a, c) + FFMAX(b, d)) / 2;

  1016.     }

  1017. }

  1018. 

  1019. 

  1020. /** Do motion compensation for 4-MV macroblock - both chroma blocks

  1021.  */

  1022. static void vc1_mc_4mv_chroma(VC1Context *v)

  1023. {

  1024.     MpegEncContext *s = &v->s;

  1025.     DSPContext *dsp = &v->s.dsp;

  1026.     uint8_t *srcU, *srcV;

  1027.     int uvdxy, uvmx, uvmy, uvsrc_x, uvsrc_y;

  1028.     int i, idx, tx = 0, ty = 0;

  1029.     int mvx[4], mvy[4], intra[4];

  1030.     static const int count[16] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4};

  1031. 

  1032.     if(!v->s.last_picture.data[0])return;

  1033.     if(s->flags & CODEC_FLAG_GRAY) return;

  1034. 

  1035.     for(i = 0; i < 4; i++) {

  1036.         mvx[i] = s->mv[0][i][0];

  1037.         mvy[i] = s->mv[0][i][1];

  1038.         intra[i] = v->mb_type[0][s->block_index[i]];

  1039.     }

  1040. 

  1041.     /* calculate chroma MV vector from four luma MVs */

  1042.     idx = (intra[3] << 3) | (intra[2] << 2) | (intra[1] << 1) | intra[0];

  1043.     if(!idx) { // all blocks are inter

  1044.         tx = median4(mvx[0], mvx[1], mvx[2], mvx[3]);

  1045.         ty = median4(mvy[0], mvy[1], mvy[2], mvy[3]);

  1046.     } else if(count[idx] == 1) { // 3 inter blocks

  1047.         switch(idx) {

  1048.         case 0x1:

  1049.             tx = mid_pred(mvx[1], mvx[2], mvx[3]);

  1050.             ty = mid_pred(mvy[1], mvy[2], mvy[3]);

  1051.             break;

  1052.         case 0x2:

  1053.             tx = mid_pred(mvx[0], mvx[2], mvx[3]);

  1054.             ty = mid_pred(mvy[0], mvy[2], mvy[3]);

  1055.             break;

  1056.         case 0x4:

  1057.             tx = mid_pred(mvx[0], mvx[1], mvx[3]);

  1058.             ty = mid_pred(mvy[0], mvy[1], mvy[3]);

  1059.             break;

  1060.         case 0x8:

  1061.             tx = mid_pred(mvx[0], mvx[1], mvx[2]);

  1062.             ty = mid_pred(mvy[0], mvy[1], mvy[2]);

  1063.             break;

  1064.         }

  1065.     } else if(count[idx] == 2) {

  1066.         int t1 = 0, t2 = 0;

  1067.         for(i=0; i<3;i++) if(!intra[i]) {t1 = i; break;}

  1068.         for(i= t1+1; i<4; i++)if(!intra[i]) {t2 = i; break;}

  1069.         tx = (mvx[t1] + mvx[t2]) / 2;

  1070.         ty = (mvy[t1] + mvy[t2]) / 2;

  1071.     } else

  1072.         return; //no need to do MC for inter blocks

  1073. 

  1074.     s->current_picture.motion_val[1][s->block_index[0]][0] = tx;

  1075.     s->current_picture.motion_val[1][s->block_index[0]][1] = ty;

  1076.     uvmx = (tx + ((tx&3) == 3)) >> 1;

  1077.     uvmy = (ty + ((ty&3) == 3)) >> 1;

  1078.     if(v->fastuvmc) {

  1079.         uvmx = uvmx + ((uvmx<0)?(uvmx&1):-(uvmx&1));

  1080.         uvmy = uvmy + ((uvmy<0)?(uvmy&1):-(uvmy&1));

  1081.     }

  1082. 

  1083.     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);

  1084.     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);

  1085. 

  1086.     if(v->profile != PROFILE_ADVANCED){

  1087.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  1088.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  1089.     }else{

  1090.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  1091.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  1092.     }

  1093. 

  1094.     srcU = s->last_picture.data[1] + uvsrc_y * s->uvlinesize + uvsrc_x;

  1095.     srcV = s->last_picture.data[2] + uvsrc_y * s->uvlinesize + uvsrc_x;

  1096.     if(v->rangeredfrm || (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1097.        || (unsigned)uvsrc_x > (s->h_edge_pos >> 1) - 9

  1098.        || (unsigned)uvsrc_y > (s->v_edge_pos >> 1) - 9){

  1099.         ff_emulated_edge_mc(s->edge_emu_buffer     , srcU, s->uvlinesize, 8+1, 8+1,

  1100.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1101.         ff_emulated_edge_mc(s->edge_emu_buffer + 16, srcV, s->uvlinesize, 8+1, 8+1,

  1102.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  1103.         srcU = s->edge_emu_buffer;

  1104.         srcV = s->edge_emu_buffer + 16;

  1105. 

  1106.         /* if we deal with range reduction we need to scale source blocks */

  1107.         if(v->rangeredfrm) {

  1108.             int i, j;

  1109.             uint8_t *src, *src2;

  1110. 

  1111.             src = srcU; src2 = srcV;

  1112.             for(j = 0; j < 9; j++) {

  1113.                 for(i = 0; i < 9; i++) {

  1114.                     src[i] = ((src[i] - 128) >> 1) + 128;

  1115.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  1116.                 }

  1117.                 src += s->uvlinesize;

  1118.                 src2 += s->uvlinesize;

  1119.             }

  1120.         }

  1121.         /* if we deal with intensity compensation we need to scale source blocks */

  1122.         if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1123.             int i, j;

  1124.             uint8_t *src, *src2;

  1125. 

  1126.             src = srcU; src2 = srcV;

  1127.             for(j = 0; j < 9; j++) {

  1128.                 for(i = 0; i < 9; i++) {

  1129.                     src[i] = v->lutuv[src[i]];

  1130.                     src2[i] = v->lutuv[src2[i]];

  1131.                 }

  1132.                 src += s->uvlinesize;

  1133.                 src2 += s->uvlinesize;

  1134.             }

  1135.         }

  1136.     }

  1137. 

  1138.     /* Chroma MC always uses qpel bilinear */

  1139.     uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);

  1140.     uvmx = (uvmx&3)<<1;

  1141.     uvmy = (uvmy&3)<<1;

  1142.     if(!v->rnd){

  1143.         dsp->put_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  1144.         dsp->put_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  1145.     }else{

  1146.         dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  1147.         dsp->put_no_rnd_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  1148.     }

  1149. }

  1150. 

  1151. static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb);

  1152. 

  1153. /**

  1154.  * Decode Simple/Main Profiles sequence header

  1155.  * @see Figure 7-8, p16-17

  1156.  * @param avctx Codec context

  1157.  * @param gb GetBit context initialized from Codec context extra_data

  1158.  * @return Status

  1159.  */

  1160. static int decode_sequence_header(AVCodecContext *avctx, GetBitContext *gb)

  1161. {

  1162.     VC1Context *v = avctx->priv_data;

  1163. 

  1164.     av_log(avctx, AV_LOG_DEBUG, "Header: %0X\n", show_bits(gb, 32));

  1165.     v->profile = get_bits(gb, 2);

  1166.     if (v->profile == PROFILE_COMPLEX)

  1167.     {

  1168.         av_log(avctx, AV_LOG_ERROR, "WMV3 Complex Profile is not fully supported\n");

  1169.     }

  1170. 

  1171.     if (v->profile == PROFILE_ADVANCED)

  1172.     {

  1173.         return decode_sequence_header_adv(v, gb);

  1174.     }

  1175.     else

  1176.     {

  1177.         v->res_sm = get_bits(gb, 2); //reserved

  1178.         if (v->res_sm)

  1179.         {

  1180.             av_log(avctx, AV_LOG_ERROR,

  1181.                    "Reserved RES_SM=%i is forbidden\n", v->res_sm);

  1182.             return -1;

  1183.         }

  1184.     }

  1185. 

  1186.     // (fps-2)/4 (->30)

  1187.     v->frmrtq_postproc = get_bits(gb, 3); //common

  1188.     // (bitrate-32kbps)/64kbps

  1189.     v->bitrtq_postproc = get_bits(gb, 5); //common

  1190.     v->s.loop_filter = get_bits(gb, 1); //common

  1191.     if(v->s.loop_filter == 1 && v->profile == PROFILE_SIMPLE)

  1192.     {

  1193.         av_log(avctx, AV_LOG_ERROR,

  1194.                "LOOPFILTER shell not be enabled in simple profile\n");

  1195.     }

  1196. 

  1197.     v->res_x8 = get_bits(gb, 1); //reserved

  1198.     if (v->res_x8)

  1199.     {

  1200.         av_log(avctx, AV_LOG_ERROR,

  1201.                "1 for reserved RES_X8 is forbidden\n");

  1202.         //return -1;

  1203.     }

  1204.     v->multires = get_bits(gb, 1);

  1205.     v->res_fasttx = get_bits(gb, 1);

  1206.     if (!v->res_fasttx)

  1207.     {

  1208.         av_log(avctx, AV_LOG_ERROR,

  1209.                "0 for reserved RES_FASTTX is forbidden\n");

  1210.         //return -1;

  1211.     }

  1212. 

  1213.     v->fastuvmc =  get_bits(gb, 1); //common

  1214.     if (!v->profile && !v->fastuvmc)

  1215.     {

  1216.         av_log(avctx, AV_LOG_ERROR,

  1217.                "FASTUVMC unavailable in Simple Profile\n");

  1218.         return -1;

  1219.     }

  1220.     v->extended_mv =  get_bits(gb, 1); //common

  1221.     if (!v->profile && v->extended_mv)

  1222.     {

  1223.         av_log(avctx, AV_LOG_ERROR,

  1224.                "Extended MVs unavailable in Simple Profile\n");

  1225.         return -1;

  1226.     }

  1227.     v->dquant =  get_bits(gb, 2); //common

  1228.     v->vstransform =  get_bits(gb, 1); //common

  1229. 

  1230.     v->res_transtab = get_bits(gb, 1);

  1231.     if (v->res_transtab)

  1232.     {

  1233.         av_log(avctx, AV_LOG_ERROR,

  1234.                "1 for reserved RES_TRANSTAB is forbidden\n");

  1235.         return -1;

  1236.     }

  1237. 

  1238.     v->overlap = get_bits(gb, 1); //common

  1239. 

  1240.     v->s.resync_marker = get_bits(gb, 1);

  1241.     v->rangered = get_bits(gb, 1);

  1242.     if (v->rangered && v->profile == PROFILE_SIMPLE)

  1243.     {

  1244.         av_log(avctx, AV_LOG_INFO,

  1245.                "RANGERED should be set to 0 in simple profile\n");

  1246.     }

  1247. 

  1248.     v->s.max_b_frames = avctx->max_b_frames = get_bits(gb, 3); //common

  1249.     v->quantizer_mode = get_bits(gb, 2); //common

  1250. 

  1251.     v->finterpflag = get_bits(gb, 1); //common

  1252.     v->res_rtm_flag = get_bits(gb, 1); //reserved

  1253.     if (!v->res_rtm_flag)

  1254.     {

  1255. //            av_log(avctx, AV_LOG_ERROR,

  1256. //                   "0 for reserved RES_RTM_FLAG is forbidden\n");

  1257.         av_log(avctx, AV_LOG_ERROR,

  1258.                "Old WMV3 version detected, only I-frames will be decoded\n");

  1259.         //return -1;

  1260.     }

  1261.     av_log(avctx, AV_LOG_DEBUG,

  1262.                "Profile %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"

  1263.                "LoopFilter=%i, MultiRes=%i, FastUVMC=%i, Extended MV=%i\n"

  1264.                "Rangered=%i, VSTransform=%i, Overlap=%i, SyncMarker=%i\n"

  1265.                "DQuant=%i, Quantizer mode=%i, Max B frames=%i\n",

  1266.                v->profile, v->frmrtq_postproc, v->bitrtq_postproc,

  1267.                v->s.loop_filter, v->multires, v->fastuvmc, v->extended_mv,

  1268.                v->rangered, v->vstransform, v->overlap, v->s.resync_marker,

  1269.                v->dquant, v->quantizer_mode, avctx->max_b_frames

  1270.                );

  1271.     return 0;

  1272. }

  1273. 

  1274. static int decode_sequence_header_adv(VC1Context *v, GetBitContext *gb)

  1275. {

  1276.     v->res_rtm_flag = 1;

  1277.     v->level = get_bits(gb, 3);

  1278.     if(v->level >= 5)

  1279.     {

  1280.         av_log(v->s.avctx, AV_LOG_ERROR, "Reserved LEVEL %i\n",v->level);

  1281.     }

  1282.     v->chromaformat = get_bits(gb, 2);

  1283.     if (v->chromaformat != 1)

  1284.     {

  1285.         av_log(v->s.avctx, AV_LOG_ERROR,

  1286.                "Only 4:2:0 chroma format supported\n");

  1287.         return -1;

  1288.     }

  1289. 

  1290.     // (fps-2)/4 (->30)

  1291.     v->frmrtq_postproc = get_bits(gb, 3); //common

  1292.     // (bitrate-32kbps)/64kbps

  1293.     v->bitrtq_postproc = get_bits(gb, 5); //common

  1294.     v->postprocflag = get_bits(gb, 1); //common

  1295. 

  1296.     v->s.avctx->coded_width = (get_bits(gb, 12) + 1) << 1;

  1297.     v->s.avctx->coded_height = (get_bits(gb, 12) + 1) << 1;

  1298.     v->s.avctx->width = v->s.avctx->coded_width;

  1299.     v->s.avctx->height = v->s.avctx->coded_height;

  1300.     v->broadcast = get_bits1(gb);

  1301.     v->interlace = get_bits1(gb);

  1302.     v->tfcntrflag = get_bits1(gb);

  1303.     v->finterpflag = get_bits1(gb);

  1304.     get_bits1(gb); // reserved

  1305. 

  1306.     v->s.h_edge_pos = v->s.avctx->coded_width;

  1307.     v->s.v_edge_pos = v->s.avctx->coded_height;

  1308. 

  1309.     av_log(v->s.avctx, AV_LOG_DEBUG,

  1310.                "Advanced Profile level %i:\nfrmrtq_postproc=%i, bitrtq_postproc=%i\n"

  1311.                "LoopFilter=%i, ChromaFormat=%i, Pulldown=%i, Interlace: %i\n"

  1312.                "TFCTRflag=%i, FINTERPflag=%i\n",

  1313.                v->level, v->frmrtq_postproc, v->bitrtq_postproc,

  1314.                v->s.loop_filter, v->chromaformat, v->broadcast, v->interlace,

  1315.                v->tfcntrflag, v->finterpflag

  1316.                );

  1317. 

  1318.     v->psf = get_bits1(gb);

  1319.     if(v->psf) { //PsF, 6.1.13

  1320.         av_log(v->s.avctx, AV_LOG_ERROR, "Progressive Segmented Frame mode: not supported (yet)\n");

  1321.         return -1;

  1322.     }

  1323.     v->s.max_b_frames = v->s.avctx->max_b_frames = 7;

  1324.     if(get_bits1(gb)) { //Display Info - decoding is not affected by it

  1325.         int w, h, ar = 0;

  1326.         av_log(v->s.avctx, AV_LOG_DEBUG, "Display extended info:\n");

  1327.         v->s.avctx->width  = v->s.width  = w = get_bits(gb, 14) + 1;

  1328.         v->s.avctx->height = v->s.height = h = get_bits(gb, 14) + 1;

  1329.         av_log(v->s.avctx, AV_LOG_DEBUG, "Display dimensions: %ix%i\n", w, h);

  1330.         if(get_bits1(gb))

  1331.             ar = get_bits(gb, 4);

  1332.         if(ar && ar < 14){

  1333.             v->s.avctx->sample_aspect_ratio = vc1_pixel_aspect[ar];

  1334.         }else if(ar == 15){

  1335.             w = get_bits(gb, 8);

  1336.             h = get_bits(gb, 8);

  1337.             v->s.avctx->sample_aspect_ratio = (AVRational){w, h};

  1338.         }

  1339. 

  1340.         if(get_bits1(gb)){ //framerate stuff

  1341.             if(get_bits1(gb)) {

  1342.                 v->s.avctx->time_base.num = 32;

  1343.                 v->s.avctx->time_base.den = get_bits(gb, 16) + 1;

  1344.             } else {

  1345.                 int nr, dr;

  1346.                 nr = get_bits(gb, 8);

  1347.                 dr = get_bits(gb, 4);

  1348.                 if(nr && nr < 8 && dr && dr < 3){

  1349.                     v->s.avctx->time_base.num = fps_dr[dr - 1];

  1350.                     v->s.avctx->time_base.den = fps_nr[nr - 1] * 1000;

  1351.                 }

  1352.             }

  1353.         }

  1354. 

  1355.         if(get_bits1(gb)){

  1356.             v->color_prim = get_bits(gb, 8);

  1357.             v->transfer_char = get_bits(gb, 8);

  1358.             v->matrix_coef = get_bits(gb, 8);

  1359.         }

  1360.     }

  1361. 

  1362.     v->hrd_param_flag = get_bits1(gb);

  1363.     if(v->hrd_param_flag) {

  1364.         int i;

  1365.         v->hrd_num_leaky_buckets = get_bits(gb, 5);

  1366.         get_bits(gb, 4); //bitrate exponent

  1367.         get_bits(gb, 4); //buffer size exponent

  1368.         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {

  1369.             get_bits(gb, 16); //hrd_rate[n]

  1370.             get_bits(gb, 16); //hrd_buffer[n]

  1371.         }

  1372.     }

  1373.     return 0;

  1374. }

  1375. 

  1376. static int decode_entry_point(AVCodecContext *avctx, GetBitContext *gb)

  1377. {

  1378.     VC1Context *v = avctx->priv_data;

  1379.     int i, blink, clentry, refdist;

  1380. 

  1381.     av_log(avctx, AV_LOG_DEBUG, "Entry point: %08X\n", show_bits_long(gb, 32));

  1382.     blink = get_bits1(gb); // broken link

  1383.     clentry = get_bits1(gb); // closed entry

  1384.     v->panscanflag = get_bits1(gb);

  1385.     refdist = get_bits1(gb); // refdist flag

  1386.     v->s.loop_filter = get_bits1(gb);

  1387.     v->fastuvmc = get_bits1(gb);

  1388.     v->extended_mv = get_bits1(gb);

  1389.     v->dquant = get_bits(gb, 2);

  1390.     v->vstransform = get_bits1(gb);

  1391.     v->overlap = get_bits1(gb);

  1392.     v->quantizer_mode = get_bits(gb, 2);

  1393. 

  1394.     if(v->hrd_param_flag){

  1395.         for(i = 0; i < v->hrd_num_leaky_buckets; i++) {

  1396.             get_bits(gb, 8); //hrd_full[n]

  1397.         }

  1398.     }

  1399. 

  1400.     if(get_bits1(gb)){

  1401.         avctx->coded_width = (get_bits(gb, 12)+1)<<1;

  1402.         avctx->coded_height = (get_bits(gb, 12)+1)<<1;

  1403.     }

  1404.     if(v->extended_mv)

  1405.         v->extended_dmv = get_bits1(gb);

  1406.     if(get_bits1(gb)) {

  1407.         av_log(avctx, AV_LOG_ERROR, "Luma scaling is not supported, expect wrong picture\n");

  1408.         skip_bits(gb, 3); // Y range, ignored for now

  1409.     }

  1410.     if(get_bits1(gb)) {

  1411.         av_log(avctx, AV_LOG_ERROR, "Chroma scaling is not supported, expect wrong picture\n");

  1412.         skip_bits(gb, 3); // UV range, ignored for now

  1413.     }

  1414. 

  1415.     av_log(avctx, AV_LOG_DEBUG, "Entry point info:\n"

  1416.         "BrokenLink=%i, ClosedEntry=%i, PanscanFlag=%i\n"

  1417.         "RefDist=%i, Postproc=%i, FastUVMC=%i, ExtMV=%i\n"

  1418.         "DQuant=%i, VSTransform=%i, Overlap=%i, Qmode=%i\n",

  1419.         blink, clentry, v->panscanflag, refdist, v->s.loop_filter,

  1420.         v->fastuvmc, v->extended_mv, v->dquant, v->vstransform, v->overlap, v->quantizer_mode);

  1421. 

  1422.     return 0;

  1423. }

  1424. 

  1425. static int vc1_parse_frame_header(VC1Context *v, GetBitContext* gb)

  1426. {

  1427.     int pqindex, lowquant, status;

  1428. 

  1429.     if(v->finterpflag) v->interpfrm = get_bits(gb, 1);

  1430.     skip_bits(gb, 2); //framecnt unused

  1431.     v->rangeredfrm = 0;

  1432.     if (v->rangered) v->rangeredfrm = get_bits(gb, 1);

  1433.     v->s.pict_type = get_bits(gb, 1);

  1434.     if (v->s.avctx->max_b_frames) {

  1435.         if (!v->s.pict_type) {

  1436.             if (get_bits(gb, 1)) v->s.pict_type = I_TYPE;

  1437.             else v->s.pict_type = B_TYPE;

  1438.         } else v->s.pict_type = P_TYPE;

  1439.     } else v->s.pict_type = v->s.pict_type ? P_TYPE : I_TYPE;

  1440. 

  1441.     v->bi_type = 0;

  1442.     if(v->s.pict_type == B_TYPE) {

  1443.         v->bfraction = get_vlc2(gb, vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1444.         v->bfraction = vc1_bfraction_lut[v->bfraction];

  1445.         if(v->bfraction == 0) {

  1446.             v->s.pict_type = BI_TYPE;

  1447.         }

  1448.     }

  1449.     if(v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)

  1450.         get_bits(gb, 7); // skip buffer fullness

  1451. 

  1452.     /* calculate RND */

  1453.     if(v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)

  1454.         v->rnd = 1;

  1455.     if(v->s.pict_type == P_TYPE)

  1456.         v->rnd ^= 1;

  1457. 

  1458.     /* Quantizer stuff */

  1459.     pqindex = get_bits(gb, 5);

  1460.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1461.         v->pq = pquant_table[0][pqindex];

  1462.     else

  1463.         v->pq = pquant_table[1][pqindex];

  1464. 

  1465.     v->pquantizer = 1;

  1466.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1467.         v->pquantizer = pqindex < 9;

  1468.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1469.         v->pquantizer = 0;

  1470.     v->pqindex = pqindex;

  1471.     if (pqindex < 9) v->halfpq = get_bits(gb, 1);

  1472.     else v->halfpq = 0;

  1473.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1474.         v->pquantizer = get_bits(gb, 1);

  1475.     v->dquantfrm = 0;

  1476.     if (v->extended_mv == 1) v->mvrange = get_prefix(gb, 0, 3);

  1477.     v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1478.     v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1479.     v->range_x = 1 << (v->k_x - 1);

  1480.     v->range_y = 1 << (v->k_y - 1);

  1481.     if (v->profile == PROFILE_ADVANCED)

  1482.     {

  1483.         if (v->postprocflag) v->postproc = get_bits(gb, 1);

  1484.     }

  1485.     else

  1486.         if (v->multires && v->s.pict_type != B_TYPE) v->respic = get_bits(gb, 2);

  1487. 

  1488.     if(v->res_x8 && (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)){

  1489.         if(get_bits1(gb))return -1;

  1490.     }

  1491. //av_log(v->s.avctx, AV_LOG_INFO, "%c Frame: QP=[%i]%i (+%i/2) %i\n",

  1492. //        (v->s.pict_type == P_TYPE) ? 'P' : ((v->s.pict_type == I_TYPE) ? 'I' : 'B'), pqindex, v->pq, v->halfpq, v->rangeredfrm);

  1493. 

  1494.     if(v->s.pict_type == I_TYPE || v->s.pict_type == P_TYPE) v->use_ic = 0;

  1495. 

  1496.     switch(v->s.pict_type) {

  1497.     case P_TYPE:

  1498.         if (v->pq < 5) v->tt_index = 0;

  1499.         else if(v->pq < 13) v->tt_index = 1;

  1500.         else v->tt_index = 2;

  1501. 

  1502.         lowquant = (v->pq > 12) ? 0 : 1;

  1503.         v->mv_mode = mv_pmode_table[lowquant][get_prefix(gb, 1, 4)];

  1504.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1505.         {

  1506.             int scale, shift, i;

  1507.             v->mv_mode2 = mv_pmode_table2[lowquant][get_prefix(gb, 1, 3)];

  1508.             v->lumscale = get_bits(gb, 6);

  1509.             v->lumshift = get_bits(gb, 6);

  1510.             v->use_ic = 1;

  1511.             /* fill lookup tables for intensity compensation */

  1512.             if(!v->lumscale) {

  1513.                 scale = -64;

  1514.                 shift = (255 - v->lumshift * 2) << 6;

  1515.                 if(v->lumshift > 31)

  1516.                     shift += 128 << 6;

  1517.             } else {

  1518.                 scale = v->lumscale + 32;

  1519.                 if(v->lumshift > 31)

  1520.                     shift = (v->lumshift - 64) << 6;

  1521.                 else

  1522.                     shift = v->lumshift << 6;

  1523.             }

  1524.             for(i = 0; i < 256; i++) {

  1525.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1526.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1527.             }

  1528.         }

  1529.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1530.             v->s.quarter_sample = 0;

  1531.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1532.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1533.                 v->s.quarter_sample = 0;

  1534.             else

  1535.                 v->s.quarter_sample = 1;

  1536.         } else

  1537.             v->s.quarter_sample = 1;

  1538.         v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || (v->mv_mode == MV_PMODE_INTENSITY_COMP && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));

  1539. 

  1540.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1541.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1542.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1543.         {

  1544.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1545.             if (status < 0) return -1;

  1546.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1547.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1548.         } else {

  1549.             v->mv_type_is_raw = 0;

  1550.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1551.         }

  1552.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1553.         if (status < 0) return -1;

  1554.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1555.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1556. 

  1557.         /* Hopefully this is correct for P frames */

  1558.         v->s.mv_table_index = get_bits(gb, 2); //but using vc1_ tables

  1559.         v->cbpcy_vlc = &vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1560. 

  1561.         if (v->dquant)

  1562.         {

  1563.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1564.             vop_dquant_decoding(v);

  1565.         }

  1566. 

  1567.         v->ttfrm = 0; //FIXME Is that so ?

  1568.         if (v->vstransform)

  1569.         {

  1570.             v->ttmbf = get_bits(gb, 1);

  1571.             if (v->ttmbf)

  1572.             {

  1573.                 v->ttfrm = ttfrm_to_tt[get_bits(gb, 2)];

  1574.             }

  1575.         } else {

  1576.             v->ttmbf = 1;

  1577.             v->ttfrm = TT_8X8;

  1578.         }

  1579.         break;

  1580.     case B_TYPE:

  1581.         if (v->pq < 5) v->tt_index = 0;

  1582.         else if(v->pq < 13) v->tt_index = 1;

  1583.         else v->tt_index = 2;

  1584. 

  1585.         lowquant = (v->pq > 12) ? 0 : 1;

  1586.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1587.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1588.         v->s.mspel = v->s.quarter_sample;

  1589. 

  1590.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1591.         if (status < 0) return -1;

  1592.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1593.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1594.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1595.         if (status < 0) return -1;

  1596.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1597.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1598. 

  1599.         v->s.mv_table_index = get_bits(gb, 2);

  1600.         v->cbpcy_vlc = &vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1601. 

  1602.         if (v->dquant)

  1603.         {

  1604.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1605.             vop_dquant_decoding(v);

  1606.         }

  1607. 

  1608.         v->ttfrm = 0;

  1609.         if (v->vstransform)

  1610.         {

  1611.             v->ttmbf = get_bits(gb, 1);

  1612.             if (v->ttmbf)

  1613.             {

  1614.                 v->ttfrm = ttfrm_to_tt[get_bits(gb, 2)];

  1615.             }

  1616.         } else {

  1617.             v->ttmbf = 1;

  1618.             v->ttfrm = TT_8X8;

  1619.         }

  1620.         break;

  1621.     }

  1622. 

  1623.     /* AC Syntax */

  1624.     v->c_ac_table_index = decode012(gb);

  1625.     if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)

  1626.     {

  1627.         v->y_ac_table_index = decode012(gb);

  1628.     }

  1629.     /* DC Syntax */

  1630.     v->s.dc_table_index = get_bits(gb, 1);

  1631. 

  1632.     if(v->s.pict_type == BI_TYPE) {

  1633.         v->s.pict_type = B_TYPE;

  1634.         v->bi_type = 1;

  1635.     }

  1636.     return 0;

  1637. }

  1638. 

  1639. static int vc1_parse_frame_header_adv(VC1Context *v, GetBitContext* gb)

  1640. {

  1641.     int pqindex, lowquant;

  1642.     int status;

  1643. 

  1644.     v->p_frame_skipped = 0;

  1645. 

  1646.     if(v->interlace){

  1647.         v->fcm = decode012(gb);

  1648.         if(v->fcm) return -1; // interlaced frames/fields are not implemented

  1649.     }

  1650.     switch(get_prefix(gb, 0, 4)) {

  1651.     case 0:

  1652.         v->s.pict_type = P_TYPE;

  1653.         break;

  1654.     case 1:

  1655.         v->s.pict_type = B_TYPE;

  1656.         break;

  1657.     case 2:

  1658.         v->s.pict_type = I_TYPE;

  1659.         break;

  1660.     case 3:

  1661.         v->s.pict_type = BI_TYPE;

  1662.         break;

  1663.     case 4:

  1664.         v->s.pict_type = P_TYPE; // skipped pic

  1665.         v->p_frame_skipped = 1;

  1666.         return 0;

  1667.     }

  1668.     if(v->tfcntrflag)

  1669.         get_bits(gb, 8);

  1670.     if(v->broadcast) {

  1671.         if(!v->interlace || v->psf) {

  1672.             v->rptfrm = get_bits(gb, 2);

  1673.         } else {

  1674.             v->tff = get_bits1(gb);

  1675.             v->rptfrm = get_bits1(gb);

  1676.         }

  1677.     }

  1678.     if(v->panscanflag) {

  1679.         //...

  1680.     }

  1681.     v->rnd = get_bits1(gb);

  1682.     if(v->interlace)

  1683.         v->uvsamp = get_bits1(gb);

  1684.     if(v->finterpflag) v->interpfrm = get_bits(gb, 1);

  1685.     if(v->s.pict_type == B_TYPE) {

  1686.         v->bfraction = get_vlc2(gb, vc1_bfraction_vlc.table, VC1_BFRACTION_VLC_BITS, 1);

  1687.         v->bfraction = vc1_bfraction_lut[v->bfraction];

  1688.         if(v->bfraction == 0) {

  1689.             v->s.pict_type = BI_TYPE; /* XXX: should not happen here */

  1690.         }

  1691.     }

  1692.     pqindex = get_bits(gb, 5);

  1693.     v->pqindex = pqindex;

  1694.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1695.         v->pq = pquant_table[0][pqindex];

  1696.     else

  1697.         v->pq = pquant_table[1][pqindex];

  1698. 

  1699.     v->pquantizer = 1;

  1700.     if (v->quantizer_mode == QUANT_FRAME_IMPLICIT)

  1701.         v->pquantizer = pqindex < 9;

  1702.     if (v->quantizer_mode == QUANT_NON_UNIFORM)

  1703.         v->pquantizer = 0;

  1704.     v->pqindex = pqindex;

  1705.     if (pqindex < 9) v->halfpq = get_bits(gb, 1);

  1706.     else v->halfpq = 0;

  1707.     if (v->quantizer_mode == QUANT_FRAME_EXPLICIT)

  1708.         v->pquantizer = get_bits(gb, 1);

  1709. 

  1710.     if(v->s.pict_type == I_TYPE || v->s.pict_type == P_TYPE) v->use_ic = 0;

  1711. 

  1712.     switch(v->s.pict_type) {

  1713.     case I_TYPE:

  1714.     case BI_TYPE:

  1715.         status = bitplane_decoding(v->acpred_plane, &v->acpred_is_raw, v);

  1716.         if (status < 0) return -1;

  1717.         av_log(v->s.avctx, AV_LOG_DEBUG, "ACPRED plane encoding: "

  1718.                 "Imode: %i, Invert: %i\n", status>>1, status&1);

  1719.         v->condover = CONDOVER_NONE;

  1720.         if(v->overlap && v->pq <= 8) {

  1721.             v->condover = decode012(gb);

  1722.             if(v->condover == CONDOVER_SELECT) {

  1723.                 status = bitplane_decoding(v->over_flags_plane, &v->overflg_is_raw, v);

  1724.                 if (status < 0) return -1;

  1725.                 av_log(v->s.avctx, AV_LOG_DEBUG, "CONDOVER plane encoding: "

  1726.                         "Imode: %i, Invert: %i\n", status>>1, status&1);

  1727.             }

  1728.         }

  1729.         break;

  1730.     case P_TYPE:

  1731.         if(v->postprocflag)

  1732.             v->postproc = get_bits1(gb);

  1733.         if (v->extended_mv) v->mvrange = get_prefix(gb, 0, 3);

  1734.         else v->mvrange = 0;

  1735.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1736.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1737.         v->range_x = 1 << (v->k_x - 1);

  1738.         v->range_y = 1 << (v->k_y - 1);

  1739. 

  1740.         if (v->pq < 5) v->tt_index = 0;

  1741.         else if(v->pq < 13) v->tt_index = 1;

  1742.         else v->tt_index = 2;

  1743. 

  1744.         lowquant = (v->pq > 12) ? 0 : 1;

  1745.         v->mv_mode = mv_pmode_table[lowquant][get_prefix(gb, 1, 4)];

  1746.         if (v->mv_mode == MV_PMODE_INTENSITY_COMP)

  1747.         {

  1748.             int scale, shift, i;

  1749.             v->mv_mode2 = mv_pmode_table2[lowquant][get_prefix(gb, 1, 3)];

  1750.             v->lumscale = get_bits(gb, 6);

  1751.             v->lumshift = get_bits(gb, 6);

  1752.             /* fill lookup tables for intensity compensation */

  1753.             if(!v->lumscale) {

  1754.                 scale = -64;

  1755.                 shift = (255 - v->lumshift * 2) << 6;

  1756.                 if(v->lumshift > 31)

  1757.                     shift += 128 << 6;

  1758.             } else {

  1759.                 scale = v->lumscale + 32;

  1760.                 if(v->lumshift > 31)

  1761.                     shift = (v->lumshift - 64) << 6;

  1762.                 else

  1763.                     shift = v->lumshift << 6;

  1764.             }

  1765.             for(i = 0; i < 256; i++) {

  1766.                 v->luty[i] = av_clip_uint8((scale * i + shift + 32) >> 6);

  1767.                 v->lutuv[i] = av_clip_uint8((scale * (i - 128) + 128*64 + 32) >> 6);

  1768.             }

  1769.             v->use_ic = 1;

  1770.         }

  1771.         if(v->mv_mode == MV_PMODE_1MV_HPEL || v->mv_mode == MV_PMODE_1MV_HPEL_BILIN)

  1772.             v->s.quarter_sample = 0;

  1773.         else if(v->mv_mode == MV_PMODE_INTENSITY_COMP) {

  1774.             if(v->mv_mode2 == MV_PMODE_1MV_HPEL || v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN)

  1775.                 v->s.quarter_sample = 0;

  1776.             else

  1777.                 v->s.quarter_sample = 1;

  1778.         } else

  1779.             v->s.quarter_sample = 1;

  1780.         v->s.mspel = !(v->mv_mode == MV_PMODE_1MV_HPEL_BILIN || (v->mv_mode == MV_PMODE_INTENSITY_COMP && v->mv_mode2 == MV_PMODE_1MV_HPEL_BILIN));

  1781. 

  1782.         if ((v->mv_mode == MV_PMODE_INTENSITY_COMP &&

  1783.                  v->mv_mode2 == MV_PMODE_MIXED_MV)

  1784.                 || v->mv_mode == MV_PMODE_MIXED_MV)

  1785.         {

  1786.             status = bitplane_decoding(v->mv_type_mb_plane, &v->mv_type_is_raw, v);

  1787.             if (status < 0) return -1;

  1788.             av_log(v->s.avctx, AV_LOG_DEBUG, "MB MV Type plane encoding: "

  1789.                    "Imode: %i, Invert: %i\n", status>>1, status&1);

  1790.         } else {

  1791.             v->mv_type_is_raw = 0;

  1792.             memset(v->mv_type_mb_plane, 0, v->s.mb_stride * v->s.mb_height);

  1793.         }

  1794.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1795.         if (status < 0) return -1;

  1796.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1797.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1798. 

  1799.         /* Hopefully this is correct for P frames */

  1800.         v->s.mv_table_index = get_bits(gb, 2); //but using vc1_ tables

  1801.         v->cbpcy_vlc = &vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1802.         if (v->dquant)

  1803.         {

  1804.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1805.             vop_dquant_decoding(v);

  1806.         }

  1807. 

  1808.         v->ttfrm = 0; //FIXME Is that so ?

  1809.         if (v->vstransform)

  1810.         {

  1811.             v->ttmbf = get_bits(gb, 1);

  1812.             if (v->ttmbf)

  1813.             {

  1814.                 v->ttfrm = ttfrm_to_tt[get_bits(gb, 2)];

  1815.             }

  1816.         } else {

  1817.             v->ttmbf = 1;

  1818.             v->ttfrm = TT_8X8;

  1819.         }

  1820.         break;

  1821.     case B_TYPE:

  1822.         if(v->postprocflag)

  1823.             v->postproc = get_bits1(gb);

  1824.         if (v->extended_mv) v->mvrange = get_prefix(gb, 0, 3);

  1825.         else v->mvrange = 0;

  1826.         v->k_x = v->mvrange + 9 + (v->mvrange >> 1); //k_x can be 9 10 12 13

  1827.         v->k_y = v->mvrange + 8; //k_y can be 8 9 10 11

  1828.         v->range_x = 1 << (v->k_x - 1);

  1829.         v->range_y = 1 << (v->k_y - 1);

  1830. 

  1831.         if (v->pq < 5) v->tt_index = 0;

  1832.         else if(v->pq < 13) v->tt_index = 1;

  1833.         else v->tt_index = 2;

  1834. 

  1835.         lowquant = (v->pq > 12) ? 0 : 1;

  1836.         v->mv_mode = get_bits1(gb) ? MV_PMODE_1MV : MV_PMODE_1MV_HPEL_BILIN;

  1837.         v->s.quarter_sample = (v->mv_mode == MV_PMODE_1MV);

  1838.         v->s.mspel = v->s.quarter_sample;

  1839. 

  1840.         status = bitplane_decoding(v->direct_mb_plane, &v->dmb_is_raw, v);

  1841.         if (status < 0) return -1;

  1842.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Direct Type plane encoding: "

  1843.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1844.         status = bitplane_decoding(v->s.mbskip_table, &v->skip_is_raw, v);

  1845.         if (status < 0) return -1;

  1846.         av_log(v->s.avctx, AV_LOG_DEBUG, "MB Skip plane encoding: "

  1847.                "Imode: %i, Invert: %i\n", status>>1, status&1);

  1848. 

  1849.         v->s.mv_table_index = get_bits(gb, 2);

  1850.         v->cbpcy_vlc = &vc1_cbpcy_p_vlc[get_bits(gb, 2)];

  1851. 

  1852.         if (v->dquant)

  1853.         {

  1854.             av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1855.             vop_dquant_decoding(v);

  1856.         }

  1857. 

  1858.         v->ttfrm = 0;

  1859.         if (v->vstransform)

  1860.         {

  1861.             v->ttmbf = get_bits(gb, 1);

  1862.             if (v->ttmbf)

  1863.             {

  1864.                 v->ttfrm = ttfrm_to_tt[get_bits(gb, 2)];

  1865.             }

  1866.         } else {

  1867.             v->ttmbf = 1;

  1868.             v->ttfrm = TT_8X8;

  1869.         }

  1870.         break;

  1871.     }

  1872. 

  1873.     /* AC Syntax */

  1874.     v->c_ac_table_index = decode012(gb);

  1875.     if (v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE)

  1876.     {

  1877.         v->y_ac_table_index = decode012(gb);

  1878.     }

  1879.     /* DC Syntax */

  1880.     v->s.dc_table_index = get_bits(gb, 1);

  1881.     if ((v->s.pict_type == I_TYPE || v->s.pict_type == BI_TYPE) && v->dquant) {

  1882.         av_log(v->s.avctx, AV_LOG_DEBUG, "VOP DQuant info\n");

  1883.         vop_dquant_decoding(v);

  1884.     }

  1885. 

  1886.     v->bi_type = 0;

  1887.     if(v->s.pict_type == BI_TYPE) {

  1888.         v->s.pict_type = B_TYPE;

  1889.         v->bi_type = 1;

  1890.     }

  1891.     return 0;

  1892. }

  1893. 

  1894. /***********************************************************************/

  1895. /**

  1896.  * @defgroup block VC-1 Block-level functions

  1897.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  1898.  * @{

  1899.  */

  1900. 

  1901. /**

  1902.  * @def GET_MQUANT

  1903.  * @brief Get macroblock-level quantizer scale

  1904.  */

  1905. #define GET_MQUANT()                                           \

  1906.   if (v->dquantfrm)                                            \

  1907.   {                                                            \

  1908.     int edges = 0;                                             \

  1909.     if (v->dqprofile == DQPROFILE_ALL_MBS)                     \

  1910.     {                                                          \

  1911.       if (v->dqbilevel)                                        \

  1912.       {                                                        \

  1913.         mquant = (get_bits(gb, 1)) ? v->altpq : v->pq;         \

  1914.       }                                                        \

  1915.       else                                                     \

  1916.       {                                                        \

  1917.         mqdiff = get_bits(gb, 3);                              \

  1918.         if (mqdiff != 7) mquant = v->pq + mqdiff;              \

  1919.         else mquant = get_bits(gb, 5);                         \

  1920.       }                                                        \

  1921.     }                                                          \

  1922.     if(v->dqprofile == DQPROFILE_SINGLE_EDGE)                  \

  1923.         edges = 1 << v->dqsbedge;                              \

  1924.     else if(v->dqprofile == DQPROFILE_DOUBLE_EDGES)            \

  1925.         edges = (3 << v->dqsbedge) % 15;                       \

  1926.     else if(v->dqprofile == DQPROFILE_FOUR_EDGES)              \

  1927.         edges = 15;                                            \

  1928.     if((edges&1) && !s->mb_x)                                  \

  1929.         mquant = v->altpq;                                     \

  1930.     if((edges&2) && s->first_slice_line)                       \

  1931.         mquant = v->altpq;                                     \

  1932.     if((edges&4) && s->mb_x == (s->mb_width - 1))              \

  1933.         mquant = v->altpq;                                     \

  1934.     if((edges&8) && s->mb_y == (s->mb_height - 1))             \

  1935.         mquant = v->altpq;                                     \

  1936.   }

  1937. 

  1938. /**

  1939.  * @def GET_MVDATA(_dmv_x, _dmv_y)

  1940.  * @brief Get MV differentials

  1941.  * @see MVDATA decoding from 8.3.5.2, p(1)20

  1942.  * @param _dmv_x Horizontal differential for decoded MV

  1943.  * @param _dmv_y Vertical differential for decoded MV

  1944.  */

  1945. #define GET_MVDATA(_dmv_x, _dmv_y)                                  \

  1946.   index = 1 + get_vlc2(gb, vc1_mv_diff_vlc[s->mv_table_index].table,\

  1947.                        VC1_MV_DIFF_VLC_BITS, 2);                    \

  1948.   if (index > 36)                                                   \

  1949.   {                                                                 \

  1950.     mb_has_coeffs = 1;                                              \

  1951.     index -= 37;                                                    \

  1952.   }                                                                 \

  1953.   else mb_has_coeffs = 0;                                           \

  1954.   s->mb_intra = 0;                                                  \

  1955.   if (!index) { _dmv_x = _dmv_y = 0; }                              \

  1956.   else if (index == 35)                                             \

  1957.   {                                                                 \

  1958.     _dmv_x = get_bits(gb, v->k_x - 1 + s->quarter_sample);          \

  1959.     _dmv_y = get_bits(gb, v->k_y - 1 + s->quarter_sample);          \

  1960.   }                                                                 \

  1961.   else if (index == 36)                                             \

  1962.   {                                                                 \

  1963.     _dmv_x = 0;                                                     \

  1964.     _dmv_y = 0;                                                     \

  1965.     s->mb_intra = 1;                                                \

  1966.   }                                                                 \

  1967.   else                                                              \

  1968.   {                                                                 \

  1969.     index1 = index%6;                                               \

  1970.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1971.     else                                   val = 0;                 \

  1972.     if(size_table[index1] - val > 0)                                \

  1973.         val = get_bits(gb, size_table[index1] - val);               \

  1974.     else                                   val = 0;                 \

  1975.     sign = 0 - (val&1);                                             \

  1976.     _dmv_x = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1977.                                                                     \

  1978.     index1 = index/6;                                               \

  1979.     if (!s->quarter_sample && index1 == 5) val = 1;                 \

  1980.     else                                   val = 0;                 \

  1981.     if(size_table[index1] - val > 0)                                \

  1982.         val = get_bits(gb, size_table[index1] - val);               \

  1983.     else                                   val = 0;                 \

  1984.     sign = 0 - (val&1);                                             \

  1985.     _dmv_y = (sign ^ ((val>>1) + offset_table[index1])) - sign;     \

  1986.   }

  1987. 

  1988. /** Predict and set motion vector

  1989.  */

  1990. static inline void vc1_pred_mv(MpegEncContext *s, int n, int dmv_x, int dmv_y, int mv1, int r_x, int r_y, uint8_t* is_intra)

  1991. {

  1992.     int xy, wrap, off = 0;

  1993.     int16_t *A, *B, *C;

  1994.     int px, py;

  1995.     int sum;

  1996. 

  1997.     /* scale MV difference to be quad-pel */

  1998.     dmv_x <<= 1 - s->quarter_sample;

  1999.     dmv_y <<= 1 - s->quarter_sample;

  2000. 

  2001.     wrap = s->b8_stride;

  2002.     xy = s->block_index[n];

  2003. 

  2004.     if(s->mb_intra){

  2005.         s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = 0;

  2006.         s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = 0;

  2007.         if(mv1) { /* duplicate motion data for 1-MV block */

  2008.             s->current_picture.motion_val[0][xy + 1][0] = 0;

  2009.             s->current_picture.motion_val[0][xy + 1][1] = 0;

  2010.             s->current_picture.motion_val[0][xy + wrap][0] = 0;

  2011.             s->current_picture.motion_val[0][xy + wrap][1] = 0;

  2012.             s->current_picture.motion_val[0][xy + wrap + 1][0] = 0;

  2013.             s->current_picture.motion_val[0][xy + wrap + 1][1] = 0;

  2014.         }

  2015.         return;

  2016.     }

  2017. 

  2018.     C = s->current_picture.motion_val[0][xy - 1];

  2019.     A = s->current_picture.motion_val[0][xy - wrap];

  2020.     if(mv1)

  2021.         off = (s->mb_x == (s->mb_width - 1)) ? -1 : 2;

  2022.     else {

  2023.         //in 4-MV mode different blocks have different B predictor position

  2024.         switch(n){

  2025.         case 0:

  2026.             off = (s->mb_x > 0) ? -1 : 1;

  2027.             break;

  2028.         case 1:

  2029.             off = (s->mb_x == (s->mb_width - 1)) ? -1 : 1;

  2030.             break;

  2031.         case 2:

  2032.             off = 1;

  2033.             break;

  2034.         case 3:

  2035.             off = -1;

  2036.         }

  2037.     }

  2038.     B = s->current_picture.motion_val[0][xy - wrap + off];

  2039. 

  2040.     if(!s->first_slice_line || (n==2 || n==3)) { // predictor A is not out of bounds

  2041.         if(s->mb_width == 1) {

  2042.             px = A[0];

  2043.             py = A[1];

  2044.         } else {

  2045.             px = mid_pred(A[0], B[0], C[0]);

  2046.             py = mid_pred(A[1], B[1], C[1]);

  2047.         }

  2048.     } else if(s->mb_x || (n==1 || n==3)) { // predictor C is not out of bounds

  2049.         px = C[0];

  2050.         py = C[1];

  2051.     } else {

  2052.         px = py = 0;

  2053.     }

  2054.     /* Pullback MV as specified in 8.3.5.3.4 */

  2055.     {

  2056.         int qx, qy, X, Y;

  2057.         qx = (s->mb_x << 6) + ((n==1 || n==3) ? 32 : 0);

  2058.         qy = (s->mb_y << 6) + ((n==2 || n==3) ? 32 : 0);

  2059.         X = (s->mb_width << 6) - 4;

  2060.         Y = (s->mb_height << 6) - 4;

  2061.         if(mv1) {

  2062.             if(qx + px < -60) px = -60 - qx;

  2063.             if(qy + py < -60) py = -60 - qy;

  2064.         } else {

  2065.             if(qx + px < -28) px = -28 - qx;

  2066.             if(qy + py < -28) py = -28 - qy;

  2067.         }

  2068.         if(qx + px > X) px = X - qx;

  2069.         if(qy + py > Y) py = Y - qy;

  2070.     }

  2071.     /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2072.     if((!s->first_slice_line || (n==2 || n==3)) && (s->mb_x || (n==1 || n==3))) {

  2073.         if(is_intra[xy - wrap])

  2074.             sum = FFABS(px) + FFABS(py);

  2075.         else

  2076.             sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2077.         if(sum > 32) {

  2078.             if(get_bits1(&s->gb)) {

  2079.                 px = A[0];

  2080.                 py = A[1];

  2081.             } else {

  2082.                 px = C[0];

  2083.                 py = C[1];

  2084.             }

  2085.         } else {

  2086.             if(is_intra[xy - 1])

  2087.                 sum = FFABS(px) + FFABS(py);

  2088.             else

  2089.                 sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2090.             if(sum > 32) {

  2091.                 if(get_bits1(&s->gb)) {

  2092.                     px = A[0];

  2093.                     py = A[1];

  2094.                 } else {

  2095.                     px = C[0];

  2096.                     py = C[1];

  2097.                 }

  2098.             }

  2099.         }

  2100.     }

  2101.     /* store MV using signed modulus of MV range defined in 4.11 */

  2102.     s->mv[0][n][0] = s->current_picture.motion_val[0][xy][0] = ((px + dmv_x + r_x) & ((r_x << 1) - 1)) - r_x;

  2103.     s->mv[0][n][1] = s->current_picture.motion_val[0][xy][1] = ((py + dmv_y + r_y) & ((r_y << 1) - 1)) - r_y;

  2104.     if(mv1) { /* duplicate motion data for 1-MV block */

  2105.         s->current_picture.motion_val[0][xy + 1][0] = s->current_picture.motion_val[0][xy][0];

  2106.         s->current_picture.motion_val[0][xy + 1][1] = s->current_picture.motion_val[0][xy][1];

  2107.         s->current_picture.motion_val[0][xy + wrap][0] = s->current_picture.motion_val[0][xy][0];

  2108.         s->current_picture.motion_val[0][xy + wrap][1] = s->current_picture.motion_val[0][xy][1];

  2109.         s->current_picture.motion_val[0][xy + wrap + 1][0] = s->current_picture.motion_val[0][xy][0];

  2110.         s->current_picture.motion_val[0][xy + wrap + 1][1] = s->current_picture.motion_val[0][xy][1];

  2111.     }

  2112. }

  2113. 

  2114. /** Motion compensation for direct or interpolated blocks in B-frames

  2115.  */

  2116. static void vc1_interp_mc(VC1Context *v)

  2117. {

  2118.     MpegEncContext *s = &v->s;

  2119.     DSPContext *dsp = &v->s.dsp;

  2120.     uint8_t *srcY, *srcU, *srcV;

  2121.     int dxy, uvdxy, mx, my, uvmx, uvmy, src_x, src_y, uvsrc_x, uvsrc_y;

  2122. 

  2123.     if(!v->s.next_picture.data[0])return;

  2124. 

  2125.     mx = s->mv[1][0][0];

  2126.     my = s->mv[1][0][1];

  2127.     uvmx = (mx + ((mx & 3) == 3)) >> 1;

  2128.     uvmy = (my + ((my & 3) == 3)) >> 1;

  2129.     if(v->fastuvmc) {

  2130.         uvmx = uvmx + ((uvmx<0)?-(uvmx&1):(uvmx&1));

  2131.         uvmy = uvmy + ((uvmy<0)?-(uvmy&1):(uvmy&1));

  2132.     }

  2133.     srcY = s->next_picture.data[0];

  2134.     srcU = s->next_picture.data[1];

  2135.     srcV = s->next_picture.data[2];

  2136. 

  2137.     src_x = s->mb_x * 16 + (mx >> 2);

  2138.     src_y = s->mb_y * 16 + (my >> 2);

  2139.     uvsrc_x = s->mb_x * 8 + (uvmx >> 2);

  2140.     uvsrc_y = s->mb_y * 8 + (uvmy >> 2);

  2141. 

  2142.     if(v->profile != PROFILE_ADVANCED){

  2143.         src_x   = av_clip(  src_x, -16, s->mb_width  * 16);

  2144.         src_y   = av_clip(  src_y, -16, s->mb_height * 16);

  2145.         uvsrc_x = av_clip(uvsrc_x,  -8, s->mb_width  *  8);

  2146.         uvsrc_y = av_clip(uvsrc_y,  -8, s->mb_height *  8);

  2147.     }else{

  2148.         src_x   = av_clip(  src_x, -17, s->avctx->coded_width);

  2149.         src_y   = av_clip(  src_y, -18, s->avctx->coded_height + 1);

  2150.         uvsrc_x = av_clip(uvsrc_x,  -8, s->avctx->coded_width  >> 1);

  2151.         uvsrc_y = av_clip(uvsrc_y,  -8, s->avctx->coded_height >> 1);

  2152.     }

  2153. 

  2154.     srcY += src_y * s->linesize + src_x;

  2155.     srcU += uvsrc_y * s->uvlinesize + uvsrc_x;

  2156.     srcV += uvsrc_y * s->uvlinesize + uvsrc_x;

  2157. 

  2158.     /* for grayscale we should not try to read from unknown area */

  2159.     if(s->flags & CODEC_FLAG_GRAY) {

  2160.         srcU = s->edge_emu_buffer + 18 * s->linesize;

  2161.         srcV = s->edge_emu_buffer + 18 * s->linesize;

  2162.     }

  2163. 

  2164.     if(v->rangeredfrm

  2165.        || (unsigned)src_x > s->h_edge_pos - (mx&3) - 16

  2166.        || (unsigned)src_y > s->v_edge_pos - (my&3) - 16){

  2167.         uint8_t *uvbuf= s->edge_emu_buffer + 19 * s->linesize;

  2168. 

  2169.         srcY -= s->mspel * (1 + s->linesize);

  2170.         ff_emulated_edge_mc(s->edge_emu_buffer, srcY, s->linesize, 17+s->mspel*2, 17+s->mspel*2,

  2171.                             src_x - s->mspel, src_y - s->mspel, s->h_edge_pos, s->v_edge_pos);

  2172.         srcY = s->edge_emu_buffer;

  2173.         ff_emulated_edge_mc(uvbuf     , srcU, s->uvlinesize, 8+1, 8+1,

  2174.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  2175.         ff_emulated_edge_mc(uvbuf + 16, srcV, s->uvlinesize, 8+1, 8+1,

  2176.                             uvsrc_x, uvsrc_y, s->h_edge_pos >> 1, s->v_edge_pos >> 1);

  2177.         srcU = uvbuf;

  2178.         srcV = uvbuf + 16;

  2179.         /* if we deal with range reduction we need to scale source blocks */

  2180.         if(v->rangeredfrm) {

  2181.             int i, j;

  2182.             uint8_t *src, *src2;

  2183. 

  2184.             src = srcY;

  2185.             for(j = 0; j < 17 + s->mspel*2; j++) {

  2186.                 for(i = 0; i < 17 + s->mspel*2; i++) src[i] = ((src[i] - 128) >> 1) + 128;

  2187.                 src += s->linesize;

  2188.             }

  2189.             src = srcU; src2 = srcV;

  2190.             for(j = 0; j < 9; j++) {

  2191.                 for(i = 0; i < 9; i++) {

  2192.                     src[i] = ((src[i] - 128) >> 1) + 128;

  2193.                     src2[i] = ((src2[i] - 128) >> 1) + 128;

  2194.                 }

  2195.                 src += s->uvlinesize;

  2196.                 src2 += s->uvlinesize;

  2197.             }

  2198.         }

  2199.         srcY += s->mspel * (1 + s->linesize);

  2200.     }

  2201. 

  2202.     mx >>= 1;

  2203.     my >>= 1;

  2204.     dxy = ((my & 1) << 1) | (mx & 1);

  2205. 

  2206.     dsp->avg_pixels_tab[0][dxy](s->dest[0], srcY, s->linesize, 16);

  2207. 

  2208.     if(s->flags & CODEC_FLAG_GRAY) return;

  2209.     /* Chroma MC always uses qpel blilinear */

  2210.     uvdxy = ((uvmy & 3) << 2) | (uvmx & 3);

  2211.     uvmx = (uvmx&3)<<1;

  2212.     uvmy = (uvmy&3)<<1;

  2213.     dsp->avg_h264_chroma_pixels_tab[0](s->dest[1], srcU, s->uvlinesize, 8, uvmx, uvmy);

  2214.     dsp->avg_h264_chroma_pixels_tab[0](s->dest[2], srcV, s->uvlinesize, 8, uvmx, uvmy);

  2215. }

  2216. 

  2217. static av_always_inline int scale_mv(int value, int bfrac, int inv, int qs)

  2218. {

  2219.     int n = bfrac;

  2220. 

  2221. #if B_FRACTION_DEN==256

  2222.     if(inv)

  2223.         n -= 256;

  2224.     if(!qs)

  2225.         return 2 * ((value * n + 255) >> 9);

  2226.     return (value * n + 128) >> 8;

  2227. #else

  2228.     if(inv)

  2229.         n -= B_FRACTION_DEN;

  2230.     if(!qs)

  2231.         return 2 * ((value * n + B_FRACTION_DEN - 1) / (2 * B_FRACTION_DEN));

  2232.     return (value * n + B_FRACTION_DEN/2) / B_FRACTION_DEN;

  2233. #endif

  2234. }

  2235. 

  2236. /** Reconstruct motion vector for B-frame and do motion compensation

  2237.  */

  2238. static inline void vc1_b_mc(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mode)

  2239. {

  2240.     if(v->use_ic) {

  2241.         v->mv_mode2 = v->mv_mode;

  2242.         v->mv_mode = MV_PMODE_INTENSITY_COMP;

  2243.     }

  2244.     if(direct) {

  2245.         vc1_mc_1mv(v, 0);

  2246.         vc1_interp_mc(v);

  2247.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  2248.         return;

  2249.     }

  2250.     if(mode == BMV_TYPE_INTERPOLATED) {

  2251.         vc1_mc_1mv(v, 0);

  2252.         vc1_interp_mc(v);

  2253.         if(v->use_ic) v->mv_mode = v->mv_mode2;

  2254.         return;

  2255.     }

  2256. 

  2257.     if(v->use_ic && (mode == BMV_TYPE_BACKWARD)) v->mv_mode = v->mv_mode2;

  2258.     vc1_mc_1mv(v, (mode == BMV_TYPE_BACKWARD));

  2259.     if(v->use_ic) v->mv_mode = v->mv_mode2;

  2260. }

  2261. 

  2262. static inline void vc1_pred_b_mv(VC1Context *v, int dmv_x[2], int dmv_y[2], int direct, int mvtype)

  2263. {

  2264.     MpegEncContext *s = &v->s;

  2265.     int xy, wrap, off = 0;

  2266.     int16_t *A, *B, *C;

  2267.     int px, py;

  2268.     int sum;

  2269.     int r_x, r_y;

  2270.     const uint8_t *is_intra = v->mb_type[0];

  2271. 

  2272.     r_x = v->range_x;

  2273.     r_y = v->range_y;

  2274.     /* scale MV difference to be quad-pel */

  2275.     dmv_x[0] <<= 1 - s->quarter_sample;

  2276.     dmv_y[0] <<= 1 - s->quarter_sample;

  2277.     dmv_x[1] <<= 1 - s->quarter_sample;

  2278.     dmv_y[1] <<= 1 - s->quarter_sample;

  2279. 

  2280.     wrap = s->b8_stride;

  2281.     xy = s->block_index[0];

  2282. 

  2283.     if(s->mb_intra) {

  2284.         s->current_picture.motion_val[0][xy][0] =

  2285.         s->current_picture.motion_val[0][xy][1] =

  2286.         s->current_picture.motion_val[1][xy][0] =

  2287.         s->current_picture.motion_val[1][xy][1] = 0;

  2288.         return;

  2289.     }

  2290.     s->mv[0][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 0, s->quarter_sample);

  2291.     s->mv[0][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 0, s->quarter_sample);

  2292.     s->mv[1][0][0] = scale_mv(s->next_picture.motion_val[1][xy][0], v->bfraction, 1, s->quarter_sample);

  2293.     s->mv[1][0][1] = scale_mv(s->next_picture.motion_val[1][xy][1], v->bfraction, 1, s->quarter_sample);

  2294.     if(direct) {

  2295.         s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2296.         s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2297.         s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2298.         s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2299.         return;

  2300.     }

  2301. 

  2302.     if((mvtype == BMV_TYPE_FORWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2303.         C = s->current_picture.motion_val[0][xy - 2];

  2304.         A = s->current_picture.motion_val[0][xy - wrap*2];

  2305.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2306.         B = s->current_picture.motion_val[0][xy - wrap*2 + off];

  2307. 

  2308.         if(!s->first_slice_line) { // predictor A is not out of bounds

  2309.             if(s->mb_width == 1) {

  2310.                 px = A[0];

  2311.                 py = A[1];

  2312.             } else {

  2313.                 px = mid_pred(A[0], B[0], C[0]);

  2314.                 py = mid_pred(A[1], B[1], C[1]);

  2315.             }

  2316.         } else if(s->mb_x) { // predictor C is not out of bounds

  2317.             px = C[0];

  2318.             py = C[1];

  2319.         } else {

  2320.             px = py = 0;

  2321.         }

  2322.         /* Pullback MV as specified in 8.3.5.3.4 */

  2323.         {

  2324.             int qx, qy, X, Y;

  2325.             if(v->profile < PROFILE_ADVANCED) {

  2326.                 qx = (s->mb_x << 5);

  2327.                 qy = (s->mb_y << 5);

  2328.                 X = (s->mb_width << 5) - 4;

  2329.                 Y = (s->mb_height << 5) - 4;

  2330.                 if(qx + px < -28) px = -28 - qx;

  2331.                 if(qy + py < -28) py = -28 - qy;

  2332.                 if(qx + px > X) px = X - qx;

  2333.                 if(qy + py > Y) py = Y - qy;

  2334.             } else {

  2335.                 qx = (s->mb_x << 6);

  2336.                 qy = (s->mb_y << 6);

  2337.                 X = (s->mb_width << 6) - 4;

  2338.                 Y = (s->mb_height << 6) - 4;

  2339.                 if(qx + px < -60) px = -60 - qx;

  2340.                 if(qy + py < -60) py = -60 - qy;

  2341.                 if(qx + px > X) px = X - qx;

  2342.                 if(qy + py > Y) py = Y - qy;

  2343.             }

  2344.         }

  2345.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2346.         if(0 && !s->first_slice_line && s->mb_x) {

  2347.             if(is_intra[xy - wrap])

  2348.                 sum = FFABS(px) + FFABS(py);

  2349.             else

  2350.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2351.             if(sum > 32) {

  2352.                 if(get_bits1(&s->gb)) {

  2353.                     px = A[0];

  2354.                     py = A[1];

  2355.                 } else {

  2356.                     px = C[0];

  2357.                     py = C[1];

  2358.                 }

  2359.             } else {

  2360.                 if(is_intra[xy - 2])

  2361.                     sum = FFABS(px) + FFABS(py);

  2362.                 else

  2363.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2364.                 if(sum > 32) {

  2365.                     if(get_bits1(&s->gb)) {

  2366.                         px = A[0];

  2367.                         py = A[1];

  2368.                     } else {

  2369.                         px = C[0];

  2370.                         py = C[1];

  2371.                     }

  2372.                 }

  2373.             }

  2374.         }

  2375.         /* store MV using signed modulus of MV range defined in 4.11 */

  2376.         s->mv[0][0][0] = ((px + dmv_x[0] + r_x) & ((r_x << 1) - 1)) - r_x;

  2377.         s->mv[0][0][1] = ((py + dmv_y[0] + r_y) & ((r_y << 1) - 1)) - r_y;

  2378.     }

  2379.     if((mvtype == BMV_TYPE_BACKWARD) || (mvtype == BMV_TYPE_INTERPOLATED)) {

  2380.         C = s->current_picture.motion_val[1][xy - 2];

  2381.         A = s->current_picture.motion_val[1][xy - wrap*2];

  2382.         off = (s->mb_x == (s->mb_width - 1)) ? -2 : 2;

  2383.         B = s->current_picture.motion_val[1][xy - wrap*2 + off];

  2384. 

  2385.         if(!s->first_slice_line) { // predictor A is not out of bounds

  2386.             if(s->mb_width == 1) {

  2387.                 px = A[0];

  2388.                 py = A[1];

  2389.             } else {

  2390.                 px = mid_pred(A[0], B[0], C[0]);

  2391.                 py = mid_pred(A[1], B[1], C[1]);

  2392.             }

  2393.         } else if(s->mb_x) { // predictor C is not out of bounds

  2394.             px = C[0];

  2395.             py = C[1];

  2396.         } else {

  2397.             px = py = 0;

  2398.         }

  2399.         /* Pullback MV as specified in 8.3.5.3.4 */

  2400.         {

  2401.             int qx, qy, X, Y;

  2402.             if(v->profile < PROFILE_ADVANCED) {

  2403.                 qx = (s->mb_x << 5);

  2404.                 qy = (s->mb_y << 5);

  2405.                 X = (s->mb_width << 5) - 4;

  2406.                 Y = (s->mb_height << 5) - 4;

  2407.                 if(qx + px < -28) px = -28 - qx;

  2408.                 if(qy + py < -28) py = -28 - qy;

  2409.                 if(qx + px > X) px = X - qx;

  2410.                 if(qy + py > Y) py = Y - qy;

  2411.             } else {

  2412.                 qx = (s->mb_x << 6);

  2413.                 qy = (s->mb_y << 6);

  2414.                 X = (s->mb_width << 6) - 4;

  2415.                 Y = (s->mb_height << 6) - 4;

  2416.                 if(qx + px < -60) px = -60 - qx;

  2417.                 if(qy + py < -60) py = -60 - qy;

  2418.                 if(qx + px > X) px = X - qx;

  2419.                 if(qy + py > Y) py = Y - qy;

  2420.             }

  2421.         }

  2422.         /* Calculate hybrid prediction as specified in 8.3.5.3.5 */

  2423.         if(0 && !s->first_slice_line && s->mb_x) {

  2424.             if(is_intra[xy - wrap])

  2425.                 sum = FFABS(px) + FFABS(py);

  2426.             else

  2427.                 sum = FFABS(px - A[0]) + FFABS(py - A[1]);

  2428.             if(sum > 32) {

  2429.                 if(get_bits1(&s->gb)) {

  2430.                     px = A[0];

  2431.                     py = A[1];

  2432.                 } else {

  2433.                     px = C[0];

  2434.                     py = C[1];

  2435.                 }

  2436.             } else {

  2437.                 if(is_intra[xy - 2])

  2438.                     sum = FFABS(px) + FFABS(py);

  2439.                 else

  2440.                     sum = FFABS(px - C[0]) + FFABS(py - C[1]);

  2441.                 if(sum > 32) {

  2442.                     if(get_bits1(&s->gb)) {

  2443.                         px = A[0];

  2444.                         py = A[1];

  2445.                     } else {

  2446.                         px = C[0];

  2447.                         py = C[1];

  2448.                     }

  2449.                 }

  2450.             }

  2451.         }

  2452.         /* store MV using signed modulus of MV range defined in 4.11 */

  2453. 

  2454.         s->mv[1][0][0] = ((px + dmv_x[1] + r_x) & ((r_x << 1) - 1)) - r_x;

  2455.         s->mv[1][0][1] = ((py + dmv_y[1] + r_y) & ((r_y << 1) - 1)) - r_y;

  2456.     }

  2457.     s->current_picture.motion_val[0][xy][0] = s->mv[0][0][0];

  2458.     s->current_picture.motion_val[0][xy][1] = s->mv[0][0][1];

  2459.     s->current_picture.motion_val[1][xy][0] = s->mv[1][0][0];

  2460.     s->current_picture.motion_val[1][xy][1] = s->mv[1][0][1];

  2461. }

  2462. 

  2463. /** Get predicted DC value for I-frames only

  2464.  * prediction dir: left=0, top=1

  2465.  * @param s MpegEncContext

  2466.  * @param[in] n block index in the current MB

  2467.  * @param dc_val_ptr Pointer to DC predictor

  2468.  * @param dir_ptr Prediction direction for use in AC prediction

  2469.  */

  2470. static inline int vc1_i_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2471.                               int16_t **dc_val_ptr, int *dir_ptr)

  2472. {

  2473.     int a, b, c, wrap, pred, scale;

  2474.     int16_t *dc_val;

  2475.     static const uint16_t dcpred[32] = {

  2476.     -1, 1024,  512,  341,  256,  205,  171,  146,  128,

  2477.          114,  102,   93,   85,   79,   73,   68,   64,

  2478.           60,   57,   54,   51,   49,   47,   45,   43,

  2479.           41,   39,   38,   37,   35,   34,   33

  2480.     };

  2481. 

  2482.     /* find prediction - wmv3_dc_scale always used here in fact */

  2483.     if (n < 4)     scale = s->y_dc_scale;

  2484.     else           scale = s->c_dc_scale;

  2485. 

  2486.     wrap = s->block_wrap[n];

  2487.     dc_val= s->dc_val[0] + s->block_index[n];

  2488. 

  2489.     /* B A

  2490.      * C X

  2491.      */

  2492.     c = dc_val[ - 1];

  2493.     b = dc_val[ - 1 - wrap];

  2494.     a = dc_val[ - wrap];

  2495. 

  2496.     if (pq < 9 || !overlap)

  2497.     {

  2498.         /* Set outer values */

  2499.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=dcpred[scale];

  2500.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=dcpred[scale];

  2501.     }

  2502.     else

  2503.     {

  2504.         /* Set outer values */

  2505.         if (s->first_slice_line && (n!=2 && n!=3)) b=a=0;

  2506.         if (s->mb_x == 0 && (n!=1 && n!=3)) b=c=0;

  2507.     }

  2508. 

  2509.     if (abs(a - b) <= abs(b - c)) {

  2510.         pred = c;

  2511.         *dir_ptr = 1;//left

  2512.     } else {

  2513.         pred = a;

  2514.         *dir_ptr = 0;//top

  2515.     }

  2516. 

  2517.     /* update predictor */

  2518.     *dc_val_ptr = &dc_val[0];

  2519.     return pred;

  2520. }

  2521. 

  2522. 

  2523. /** Get predicted DC value

  2524.  * prediction dir: left=0, top=1

  2525.  * @param s MpegEncContext

  2526.  * @param[in] n block index in the current MB

  2527.  * @param dc_val_ptr Pointer to DC predictor

  2528.  * @param dir_ptr Prediction direction for use in AC prediction

  2529.  */

  2530. static inline int vc1_pred_dc(MpegEncContext *s, int overlap, int pq, int n,

  2531.                               int a_avail, int c_avail,

  2532.                               int16_t **dc_val_ptr, int *dir_ptr)

  2533. {

  2534.     int a, b, c, wrap, pred, scale;

  2535.     int16_t *dc_val;

  2536.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2537.     int q1, q2 = 0;

  2538. 

  2539.     /* find prediction - wmv3_dc_scale always used here in fact */

  2540.     if (n < 4)     scale = s->y_dc_scale;

  2541.     else           scale = s->c_dc_scale;

  2542. 

  2543.     wrap = s->block_wrap[n];

  2544.     dc_val= s->dc_val[0] + s->block_index[n];

  2545. 

  2546.     /* B A

  2547.      * C X

  2548.      */

  2549.     c = dc_val[ - 1];

  2550.     b = dc_val[ - 1 - wrap];

  2551.     a = dc_val[ - wrap];

  2552.     /* scale predictors if needed */

  2553.     q1 = s->current_picture.qscale_table[mb_pos];

  2554.     if(c_avail && (n!= 1 && n!=3)) {

  2555.         q2 = s->current_picture.qscale_table[mb_pos - 1];

  2556.         if(q2 && q2 != q1)

  2557.             c = (c * s->y_dc_scale_table[q2] * vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2558.     }

  2559.     if(a_avail && (n!= 2 && n!=3)) {

  2560.         q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2561.         if(q2 && q2 != q1)

  2562.             a = (a * s->y_dc_scale_table[q2] * vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2563.     }

  2564.     if(a_avail && c_avail && (n!=3)) {

  2565.         int off = mb_pos;

  2566.         if(n != 1) off--;

  2567.         if(n != 2) off -= s->mb_stride;

  2568.         q2 = s->current_picture.qscale_table[off];

  2569.         if(q2 && q2 != q1)

  2570.             b = (b * s->y_dc_scale_table[q2] * vc1_dqscale[s->y_dc_scale_table[q1] - 1] + 0x20000) >> 18;

  2571.     }

  2572. 

  2573.     if(a_avail && c_avail) {

  2574.         if(abs(a - b) <= abs(b - c)) {

  2575.             pred = c;

  2576.             *dir_ptr = 1;//left

  2577.         } else {

  2578.             pred = a;

  2579.             *dir_ptr = 0;//top

  2580.         }

  2581.     } else if(a_avail) {

  2582.         pred = a;

  2583.         *dir_ptr = 0;//top

  2584.     } else if(c_avail) {

  2585.         pred = c;

  2586.         *dir_ptr = 1;//left

  2587.     } else {

  2588.         pred = 0;

  2589.         *dir_ptr = 1;//left

  2590.     }

  2591. 

  2592.     /* update predictor */

  2593.     *dc_val_ptr = &dc_val[0];

  2594.     return pred;

  2595. }

  2596. 

  2597. 

  2598. /**

  2599.  * @defgroup std_mb VC1 Macroblock-level functions in Simple/Main Profiles

  2600.  * @see 7.1.4, p91 and 8.1.1.7, p(1)04

  2601.  * @{

  2602.  */

  2603. 

  2604. static inline int vc1_coded_block_pred(MpegEncContext * s, int n, uint8_t **coded_block_ptr)

  2605. {

  2606.     int xy, wrap, pred, a, b, c;

  2607. 

  2608.     xy = s->block_index[n];

  2609.     wrap = s->b8_stride;

  2610. 

  2611.     /* B C

  2612.      * A X

  2613.      */

  2614.     a = s->coded_block[xy - 1       ];

  2615.     b = s->coded_block[xy - 1 - wrap];

  2616.     c = s->coded_block[xy     - wrap];

  2617. 

  2618.     if (b == c) {

  2619.         pred = a;

  2620.     } else {

  2621.         pred = c;

  2622.     }

  2623. 

  2624.     /* store value */

  2625.     *coded_block_ptr = &s->coded_block[xy];

  2626. 

  2627.     return pred;

  2628. }

  2629. 

  2630. /**

  2631.  * Decode one AC coefficient

  2632.  * @param v The VC1 context

  2633.  * @param last Last coefficient

  2634.  * @param skip How much zero coefficients to skip

  2635.  * @param value Decoded AC coefficient value

  2636.  * @see 8.1.3.4

  2637.  */

  2638. static void vc1_decode_ac_coeff(VC1Context *v, int *last, int *skip, int *value, int codingset)

  2639. {

  2640.     GetBitContext *gb = &v->s.gb;

  2641.     int index, escape, run = 0, level = 0, lst = 0;

  2642. 

  2643.     index = get_vlc2(gb, vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2644.     if (index != vc1_ac_sizes[codingset] - 1) {

  2645.         run = vc1_index_decode_table[codingset][index][0];

  2646.         level = vc1_index_decode_table[codingset][index][1];

  2647.         lst = index >= vc1_last_decode_table[codingset];

  2648.         if(get_bits(gb, 1))

  2649.             level = -level;

  2650.     } else {

  2651.         escape = decode210(gb);

  2652.         if (escape != 2) {

  2653.             index = get_vlc2(gb, vc1_ac_coeff_table[codingset].table, AC_VLC_BITS, 3);

  2654.             run = vc1_index_decode_table[codingset][index][0];

  2655.             level = vc1_index_decode_table[codingset][index][1];

  2656.             lst = index >= vc1_last_decode_table[codingset];

  2657.             if(escape == 0) {

  2658.                 if(lst)

  2659.                     level += vc1_last_delta_level_table[codingset][run];

  2660.                 else

  2661.                     level += vc1_delta_level_table[codingset][run];

  2662.             } else {

  2663.                 if(lst)

  2664.                     run += vc1_last_delta_run_table[codingset][level] + 1;

  2665.                 else

  2666.                     run += vc1_delta_run_table[codingset][level] + 1;

  2667.             }

  2668.             if(get_bits(gb, 1))

  2669.                 level = -level;

  2670.         } else {

  2671.             int sign;

  2672.             lst = get_bits(gb, 1);

  2673.             if(v->s.esc3_level_length == 0) {

  2674.                 if(v->pq < 8 || v->dquantfrm) { // table 59

  2675.                     v->s.esc3_level_length = get_bits(gb, 3);

  2676.                     if(!v->s.esc3_level_length)

  2677.                         v->s.esc3_level_length = get_bits(gb, 2) + 8;

  2678.                 } else { //table 60

  2679.                     v->s.esc3_level_length = get_prefix(gb, 1, 6) + 2;

  2680.                 }

  2681.                 v->s.esc3_run_length = 3 + get_bits(gb, 2);

  2682.             }

  2683.             run = get_bits(gb, v->s.esc3_run_length);

  2684.             sign = get_bits(gb, 1);

  2685.             level = get_bits(gb, v->s.esc3_level_length);

  2686.             if(sign)

  2687.                 level = -level;

  2688.         }

  2689.     }

  2690. 

  2691.     *last = lst;

  2692.     *skip = run;

  2693.     *value = level;

  2694. }

  2695. 

  2696. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2697.  * @param v VC1Context

  2698.  * @param block block to decode

  2699.  * @param coded are AC coeffs present or not

  2700.  * @param codingset set of VLC to decode data

  2701.  */

  2702. static int vc1_decode_i_block(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset)

  2703. {

  2704.     GetBitContext *gb = &v->s.gb;

  2705.     MpegEncContext *s = &v->s;

  2706.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2707.     int run_diff, i;

  2708.     int16_t *dc_val;

  2709.     int16_t *ac_val, *ac_val2;

  2710.     int dcdiff;

  2711. 

  2712.     /* Get DC differential */

  2713.     if (n < 4) {

  2714.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2715.     } else {

  2716.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2717.     }

  2718.     if (dcdiff < 0){

  2719.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2720.         return -1;

  2721.     }

  2722.     if (dcdiff)

  2723.     {

  2724.         if (dcdiff == 119 /* ESC index value */)

  2725.         {

  2726.             /* TODO: Optimize */

  2727.             if (v->pq == 1) dcdiff = get_bits(gb, 10);

  2728.             else if (v->pq == 2) dcdiff = get_bits(gb, 9);

  2729.             else dcdiff = get_bits(gb, 8);

  2730.         }

  2731.         else

  2732.         {

  2733.             if (v->pq == 1)

  2734.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2735.             else if (v->pq == 2)

  2736.                 dcdiff = (dcdiff<<1) + get_bits(gb, 1) - 1;

  2737.         }

  2738.         if (get_bits(gb, 1))

  2739.             dcdiff = -dcdiff;

  2740.     }

  2741. 

  2742.     /* Prediction */

  2743.     dcdiff += vc1_i_pred_dc(&v->s, v->overlap, v->pq, n, &dc_val, &dc_pred_dir);

  2744.     *dc_val = dcdiff;

  2745. 

  2746.     /* Store the quantized DC coeff, used for prediction */

  2747.     if (n < 4) {

  2748.         block[0] = dcdiff * s->y_dc_scale;

  2749.     } else {

  2750.         block[0] = dcdiff * s->c_dc_scale;

  2751.     }

  2752.     /* Skip ? */

  2753.     run_diff = 0;

  2754.     i = 0;

  2755.     if (!coded) {

  2756.         goto not_coded;

  2757.     }

  2758. 

  2759.     //AC Decoding

  2760.     i = 1;

  2761. 

  2762.     {

  2763.         int last = 0, skip, value;

  2764.         const int8_t *zz_table;

  2765.         int scale;

  2766.         int k;

  2767. 

  2768.         scale = v->pq * 2 + v->halfpq;

  2769. 

  2770.         if(v->s.ac_pred) {

  2771.             if(!dc_pred_dir)

  2772.                 zz_table = vc1_horizontal_zz;

  2773.             else

  2774.                 zz_table = vc1_vertical_zz;

  2775.         } else

  2776.             zz_table = vc1_normal_zz;

  2777. 

  2778.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2779.         ac_val2 = ac_val;

  2780.         if(dc_pred_dir) //left

  2781.             ac_val -= 16;

  2782.         else //top

  2783.             ac_val -= 16 * s->block_wrap[n];

  2784. 

  2785.         while (!last) {

  2786.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2787.             i += skip;

  2788.             if(i > 63)

  2789.                 break;

  2790.             block[zz_table[i++]] = value;

  2791.         }

  2792. 

  2793.         /* apply AC prediction if needed */

  2794.         if(s->ac_pred) {

  2795.             if(dc_pred_dir) { //left

  2796.                 for(k = 1; k < 8; k++)

  2797.                     block[k << 3] += ac_val[k];

  2798.             } else { //top

  2799.                 for(k = 1; k < 8; k++)

  2800.                     block[k] += ac_val[k + 8];

  2801.             }

  2802.         }

  2803.         /* save AC coeffs for further prediction */

  2804.         for(k = 1; k < 8; k++) {

  2805.             ac_val2[k] = block[k << 3];

  2806.             ac_val2[k + 8] = block[k];

  2807.         }

  2808. 

  2809.         /* scale AC coeffs */

  2810.         for(k = 1; k < 64; k++)

  2811.             if(block[k]) {

  2812.                 block[k] *= scale;

  2813.                 if(!v->pquantizer)

  2814.                     block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2815.             }

  2816. 

  2817.         if(s->ac_pred) i = 63;

  2818.     }

  2819. 

  2820. not_coded:

  2821.     if(!coded) {

  2822.         int k, scale;

  2823.         ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2824.         ac_val2 = ac_val;

  2825. 

  2826.         scale = v->pq * 2 + v->halfpq;

  2827.         memset(ac_val2, 0, 16 * 2);

  2828.         if(dc_pred_dir) {//left

  2829.             ac_val -= 16;

  2830.             if(s->ac_pred)

  2831.                 memcpy(ac_val2, ac_val, 8 * 2);

  2832.         } else {//top

  2833.             ac_val -= 16 * s->block_wrap[n];

  2834.             if(s->ac_pred)

  2835.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  2836.         }

  2837. 

  2838.         /* apply AC prediction if needed */

  2839.         if(s->ac_pred) {

  2840.             if(dc_pred_dir) { //left

  2841.                 for(k = 1; k < 8; k++) {

  2842.                     block[k << 3] = ac_val[k] * scale;

  2843.                     if(!v->pquantizer && block[k << 3])

  2844.                         block[k << 3] += (block[k << 3] < 0) ? -v->pq : v->pq;

  2845.                 }

  2846.             } else { //top

  2847.                 for(k = 1; k < 8; k++) {

  2848.                     block[k] = ac_val[k + 8] * scale;

  2849.                     if(!v->pquantizer && block[k])

  2850.                         block[k] += (block[k] < 0) ? -v->pq : v->pq;

  2851.                 }

  2852.             }

  2853.             i = 63;

  2854.         }

  2855.     }

  2856.     s->block_last_index[n] = i;

  2857. 

  2858.     return 0;

  2859. }

  2860. 

  2861. /** Decode intra block in intra frames - should be faster than decode_intra_block

  2862.  * @param v VC1Context

  2863.  * @param block block to decode

  2864.  * @param coded are AC coeffs present or not

  2865.  * @param codingset set of VLC to decode data

  2866.  */

  2867. static int vc1_decode_i_block_adv(VC1Context *v, DCTELEM block[64], int n, int coded, int codingset, int mquant)

  2868. {

  2869.     GetBitContext *gb = &v->s.gb;

  2870.     MpegEncContext *s = &v->s;

  2871.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  2872.     int run_diff, i;

  2873.     int16_t *dc_val;

  2874.     int16_t *ac_val, *ac_val2;

  2875.     int dcdiff;

  2876.     int a_avail = v->a_avail, c_avail = v->c_avail;

  2877.     int use_pred = s->ac_pred;

  2878.     int scale;

  2879.     int q1, q2 = 0;

  2880.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  2881. 

  2882.     /* Get DC differential */

  2883.     if (n < 4) {

  2884.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2885.     } else {

  2886.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  2887.     }

  2888.     if (dcdiff < 0){

  2889.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  2890.         return -1;

  2891.     }

  2892.     if (dcdiff)

  2893.     {

  2894.         if (dcdiff == 119 /* ESC index value */)

  2895.         {

  2896.             /* TODO: Optimize */

  2897.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  2898.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  2899.             else dcdiff = get_bits(gb, 8);

  2900.         }

  2901.         else

  2902.         {

  2903.             if (mquant == 1)

  2904.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  2905.             else if (mquant == 2)

  2906.                 dcdiff = (dcdiff<<1) + get_bits(gb, 1) - 1;

  2907.         }

  2908.         if (get_bits(gb, 1))

  2909.             dcdiff = -dcdiff;

  2910.     }

  2911. 

  2912.     /* Prediction */

  2913.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, v->a_avail, v->c_avail, &dc_val, &dc_pred_dir);

  2914.     *dc_val = dcdiff;

  2915. 

  2916.     /* Store the quantized DC coeff, used for prediction */

  2917.     if (n < 4) {

  2918.         block[0] = dcdiff * s->y_dc_scale;

  2919.     } else {

  2920.         block[0] = dcdiff * s->c_dc_scale;

  2921.     }

  2922.     /* Skip ? */

  2923.     run_diff = 0;

  2924.     i = 0;

  2925. 

  2926.     //AC Decoding

  2927.     i = 1;

  2928. 

  2929.     /* check if AC is needed at all and adjust direction if needed */

  2930.     if(!a_avail) dc_pred_dir = 1;

  2931.     if(!c_avail) dc_pred_dir = 0;

  2932.     if(!a_avail && !c_avail) use_pred = 0;

  2933.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  2934.     ac_val2 = ac_val;

  2935. 

  2936.     scale = mquant * 2 + v->halfpq;

  2937. 

  2938.     if(dc_pred_dir) //left

  2939.         ac_val -= 16;

  2940.     else //top

  2941.         ac_val -= 16 * s->block_wrap[n];

  2942. 

  2943.     q1 = s->current_picture.qscale_table[mb_pos];

  2944.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  2945.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  2946.     if(n && n<4) q2 = q1;

  2947. 

  2948.     if(coded) {

  2949.         int last = 0, skip, value;

  2950.         const int8_t *zz_table;

  2951.         int k;

  2952. 

  2953.         if(v->s.ac_pred) {

  2954.             if(!dc_pred_dir)

  2955.                 zz_table = vc1_horizontal_zz;

  2956.             else

  2957.                 zz_table = vc1_vertical_zz;

  2958.         } else

  2959.             zz_table = vc1_normal_zz;

  2960. 

  2961.         while (!last) {

  2962.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  2963.             i += skip;

  2964.             if(i > 63)

  2965.                 break;

  2966.             block[zz_table[i++]] = value;

  2967.         }

  2968. 

  2969.         /* apply AC prediction if needed */

  2970.         if(use_pred) {

  2971.             /* scale predictors if needed*/

  2972.             if(q2 && q1!=q2) {

  2973.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  2974.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  2975. 

  2976.                 if(dc_pred_dir) { //left

  2977.                     for(k = 1; k < 8; k++)

  2978.                         block[k << 3] += (ac_val[k] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2979.                 } else { //top

  2980.                     for(k = 1; k < 8; k++)

  2981.                         block[k] += (ac_val[k + 8] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  2982.                 }

  2983.             } else {

  2984.                 if(dc_pred_dir) { //left

  2985.                     for(k = 1; k < 8; k++)

  2986.                         block[k << 3] += ac_val[k];

  2987.                 } else { //top

  2988.                     for(k = 1; k < 8; k++)

  2989.                         block[k] += ac_val[k + 8];

  2990.                 }

  2991.             }

  2992.         }

  2993.         /* save AC coeffs for further prediction */

  2994.         for(k = 1; k < 8; k++) {

  2995.             ac_val2[k] = block[k << 3];

  2996.             ac_val2[k + 8] = block[k];

  2997.         }

  2998. 

  2999.         /* scale AC coeffs */

  3000.         for(k = 1; k < 64; k++)

  3001.             if(block[k]) {

  3002.                 block[k] *= scale;

  3003.                 if(!v->pquantizer)

  3004.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  3005.             }

  3006. 

  3007.         if(use_pred) i = 63;

  3008.     } else { // no AC coeffs

  3009.         int k;

  3010. 

  3011.         memset(ac_val2, 0, 16 * 2);

  3012.         if(dc_pred_dir) {//left

  3013.             if(use_pred) {

  3014.                 memcpy(ac_val2, ac_val, 8 * 2);

  3015.                 if(q2 && q1!=q2) {

  3016.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3017.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3018.                     for(k = 1; k < 8; k++)

  3019.                         ac_val2[k] = (ac_val2[k] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3020.                 }

  3021.             }

  3022.         } else {//top

  3023.             if(use_pred) {

  3024.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  3025.                 if(q2 && q1!=q2) {

  3026.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3027.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3028.                     for(k = 1; k < 8; k++)

  3029.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3030.                 }

  3031.             }

  3032.         }

  3033. 

  3034.         /* apply AC prediction if needed */

  3035.         if(use_pred) {

  3036.             if(dc_pred_dir) { //left

  3037.                 for(k = 1; k < 8; k++) {

  3038.                     block[k << 3] = ac_val2[k] * scale;

  3039.                     if(!v->pquantizer && block[k << 3])

  3040.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  3041.                 }

  3042.             } else { //top

  3043.                 for(k = 1; k < 8; k++) {

  3044.                     block[k] = ac_val2[k + 8] * scale;

  3045.                     if(!v->pquantizer && block[k])

  3046.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  3047.                 }

  3048.             }

  3049.             i = 63;

  3050.         }

  3051.     }

  3052.     s->block_last_index[n] = i;

  3053. 

  3054.     return 0;

  3055. }

  3056. 

  3057. /** Decode intra block in inter frames - more generic version than vc1_decode_i_block

  3058.  * @param v VC1Context

  3059.  * @param block block to decode

  3060.  * @param coded are AC coeffs present or not

  3061.  * @param mquant block quantizer

  3062.  * @param codingset set of VLC to decode data

  3063.  */

  3064. static int vc1_decode_intra_block(VC1Context *v, DCTELEM block[64], int n, int coded, int mquant, int codingset)

  3065. {

  3066.     GetBitContext *gb = &v->s.gb;

  3067.     MpegEncContext *s = &v->s;

  3068.     int dc_pred_dir = 0; /* Direction of the DC prediction used */

  3069.     int run_diff, i;

  3070.     int16_t *dc_val;

  3071.     int16_t *ac_val, *ac_val2;

  3072.     int dcdiff;

  3073.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3074.     int a_avail = v->a_avail, c_avail = v->c_avail;

  3075.     int use_pred = s->ac_pred;

  3076.     int scale;

  3077.     int q1, q2 = 0;

  3078. 

  3079.     /* XXX: Guard against dumb values of mquant */

  3080.     mquant = (mquant < 1) ? 0 : ( (mquant>31) ? 31 : mquant );

  3081. 

  3082.     /* Set DC scale - y and c use the same */

  3083.     s->y_dc_scale = s->y_dc_scale_table[mquant];

  3084.     s->c_dc_scale = s->c_dc_scale_table[mquant];

  3085. 

  3086.     /* Get DC differential */

  3087.     if (n < 4) {

  3088.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_luma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  3089.     } else {

  3090.         dcdiff = get_vlc2(&s->gb, ff_msmp4_dc_chroma_vlc[s->dc_table_index].table, DC_VLC_BITS, 3);

  3091.     }

  3092.     if (dcdiff < 0){

  3093.         av_log(s->avctx, AV_LOG_ERROR, "Illegal DC VLC\n");

  3094.         return -1;

  3095.     }

  3096.     if (dcdiff)

  3097.     {

  3098.         if (dcdiff == 119 /* ESC index value */)

  3099.         {

  3100.             /* TODO: Optimize */

  3101.             if (mquant == 1) dcdiff = get_bits(gb, 10);

  3102.             else if (mquant == 2) dcdiff = get_bits(gb, 9);

  3103.             else dcdiff = get_bits(gb, 8);

  3104.         }

  3105.         else

  3106.         {

  3107.             if (mquant == 1)

  3108.                 dcdiff = (dcdiff<<2) + get_bits(gb, 2) - 3;

  3109.             else if (mquant == 2)

  3110.                 dcdiff = (dcdiff<<1) + get_bits(gb, 1) - 1;

  3111.         }

  3112.         if (get_bits(gb, 1))

  3113.             dcdiff = -dcdiff;

  3114.     }

  3115. 

  3116.     /* Prediction */

  3117.     dcdiff += vc1_pred_dc(&v->s, v->overlap, mquant, n, a_avail, c_avail, &dc_val, &dc_pred_dir);

  3118.     *dc_val = dcdiff;

  3119. 

  3120.     /* Store the quantized DC coeff, used for prediction */

  3121. 

  3122.     if (n < 4) {

  3123.         block[0] = dcdiff * s->y_dc_scale;

  3124.     } else {

  3125.         block[0] = dcdiff * s->c_dc_scale;

  3126.     }

  3127.     /* Skip ? */

  3128.     run_diff = 0;

  3129.     i = 0;

  3130. 

  3131.     //AC Decoding

  3132.     i = 1;

  3133. 

  3134.     /* check if AC is needed at all and adjust direction if needed */

  3135.     if(!a_avail) dc_pred_dir = 1;

  3136.     if(!c_avail) dc_pred_dir = 0;

  3137.     if(!a_avail && !c_avail) use_pred = 0;

  3138.     ac_val = s->ac_val[0][0] + s->block_index[n] * 16;

  3139.     ac_val2 = ac_val;

  3140. 

  3141.     scale = mquant * 2 + v->halfpq;

  3142. 

  3143.     if(dc_pred_dir) //left

  3144.         ac_val -= 16;

  3145.     else //top

  3146.         ac_val -= 16 * s->block_wrap[n];

  3147. 

  3148.     q1 = s->current_picture.qscale_table[mb_pos];

  3149.     if(dc_pred_dir && c_avail && mb_pos) q2 = s->current_picture.qscale_table[mb_pos - 1];

  3150.     if(!dc_pred_dir && a_avail && mb_pos >= s->mb_stride) q2 = s->current_picture.qscale_table[mb_pos - s->mb_stride];

  3151.     if(n && n<4) q2 = q1;

  3152. 

  3153.     if(coded) {

  3154.         int last = 0, skip, value;

  3155.         const int8_t *zz_table;

  3156.         int k;

  3157. 

  3158.         zz_table = vc1_simple_progressive_8x8_zz;

  3159. 

  3160.         while (!last) {

  3161.             vc1_decode_ac_coeff(v, &last, &skip, &value, codingset);

  3162.             i += skip;

  3163.             if(i > 63)

  3164.                 break;

  3165.             block[zz_table[i++]] = value;

  3166.         }

  3167. 

  3168.         /* apply AC prediction if needed */

  3169.         if(use_pred) {

  3170.             /* scale predictors if needed*/

  3171.             if(q2 && q1!=q2) {

  3172.                 q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3173.                 q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3174. 

  3175.                 if(dc_pred_dir) { //left

  3176.                     for(k = 1; k < 8; k++)

  3177.                         block[k << 3] += (ac_val[k] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3178.                 } else { //top

  3179.                     for(k = 1; k < 8; k++)

  3180.                         block[k] += (ac_val[k + 8] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3181.                 }

  3182.             } else {

  3183.                 if(dc_pred_dir) { //left

  3184.                     for(k = 1; k < 8; k++)

  3185.                         block[k << 3] += ac_val[k];

  3186.                 } else { //top

  3187.                     for(k = 1; k < 8; k++)

  3188.                         block[k] += ac_val[k + 8];

  3189.                 }

  3190.             }

  3191.         }

  3192.         /* save AC coeffs for further prediction */

  3193.         for(k = 1; k < 8; k++) {

  3194.             ac_val2[k] = block[k << 3];

  3195.             ac_val2[k + 8] = block[k];

  3196.         }

  3197. 

  3198.         /* scale AC coeffs */

  3199.         for(k = 1; k < 64; k++)

  3200.             if(block[k]) {

  3201.                 block[k] *= scale;

  3202.                 if(!v->pquantizer)

  3203.                     block[k] += (block[k] < 0) ? -mquant : mquant;

  3204.             }

  3205. 

  3206.         if(use_pred) i = 63;

  3207.     } else { // no AC coeffs

  3208.         int k;

  3209. 

  3210.         memset(ac_val2, 0, 16 * 2);

  3211.         if(dc_pred_dir) {//left

  3212.             if(use_pred) {

  3213.                 memcpy(ac_val2, ac_val, 8 * 2);

  3214.                 if(q2 && q1!=q2) {

  3215.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3216.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3217.                     for(k = 1; k < 8; k++)

  3218.                         ac_val2[k] = (ac_val2[k] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3219.                 }

  3220.             }

  3221.         } else {//top

  3222.             if(use_pred) {

  3223.                 memcpy(ac_val2 + 8, ac_val + 8, 8 * 2);

  3224.                 if(q2 && q1!=q2) {

  3225.                     q1 = q1 * 2 + ((q1 == v->pq) ? v->halfpq : 0) - 1;

  3226.                     q2 = q2 * 2 + ((q2 == v->pq) ? v->halfpq : 0) - 1;

  3227.                     for(k = 1; k < 8; k++)

  3228.                         ac_val2[k + 8] = (ac_val2[k + 8] * q2 * vc1_dqscale[q1 - 1] + 0x20000) >> 18;

  3229.                 }

  3230.             }

  3231.         }

  3232. 

  3233.         /* apply AC prediction if needed */

  3234.         if(use_pred) {

  3235.             if(dc_pred_dir) { //left

  3236.                 for(k = 1; k < 8; k++) {

  3237.                     block[k << 3] = ac_val2[k] * scale;

  3238.                     if(!v->pquantizer && block[k << 3])

  3239.                         block[k << 3] += (block[k << 3] < 0) ? -mquant : mquant;

  3240.                 }

  3241.             } else { //top

  3242.                 for(k = 1; k < 8; k++) {

  3243.                     block[k] = ac_val2[k + 8] * scale;

  3244.                     if(!v->pquantizer && block[k])

  3245.                         block[k] += (block[k] < 0) ? -mquant : mquant;

  3246.                 }

  3247.             }

  3248.             i = 63;

  3249.         }

  3250.     }

  3251.     s->block_last_index[n] = i;

  3252. 

  3253.     return 0;

  3254. }

  3255. 

  3256. /** Decode P block

  3257.  */

  3258. static int vc1_decode_p_block(VC1Context *v, DCTELEM block[64], int n, int mquant, int ttmb, int first_block)

  3259. {

  3260.     MpegEncContext *s = &v->s;

  3261.     GetBitContext *gb = &s->gb;

  3262.     int i, j;

  3263.     int subblkpat = 0;

  3264.     int scale, off, idx, last, skip, value;

  3265.     int ttblk = ttmb & 7;

  3266. 

  3267.     if(ttmb == -1) {

  3268.         ttblk = ttblk_to_tt[v->tt_index][get_vlc2(gb, vc1_ttblk_vlc[v->tt_index].table, VC1_TTBLK_VLC_BITS, 1)];

  3269.     }

  3270.     if(ttblk == TT_4X4) {

  3271.         subblkpat = ~(get_vlc2(gb, vc1_subblkpat_vlc[v->tt_index].table, VC1_SUBBLKPAT_VLC_BITS, 1) + 1);

  3272.     }

  3273.     if((ttblk != TT_8X8 && ttblk != TT_4X4) && (v->ttmbf || (ttmb != -1 && (ttmb & 8) && !first_block))) {

  3274.         subblkpat = decode012(gb);

  3275.         if(subblkpat) subblkpat ^= 3; //swap decoded pattern bits

  3276.         if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) ttblk = TT_8X4;

  3277.         if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) ttblk = TT_4X8;

  3278.     }

  3279.     scale = 2 * mquant + v->halfpq;

  3280. 

  3281.     // convert transforms like 8X4_TOP to generic TT and SUBBLKPAT

  3282.     if(ttblk == TT_8X4_TOP || ttblk == TT_8X4_BOTTOM) {

  3283.         subblkpat = 2 - (ttblk == TT_8X4_TOP);

  3284.         ttblk = TT_8X4;

  3285.     }

  3286.     if(ttblk == TT_4X8_RIGHT || ttblk == TT_4X8_LEFT) {

  3287.         subblkpat = 2 - (ttblk == TT_4X8_LEFT);

  3288.         ttblk = TT_4X8;

  3289.     }

  3290.     switch(ttblk) {

  3291.     case TT_8X8:

  3292.         i = 0;

  3293.         last = 0;

  3294.         while (!last) {

  3295.             vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3296.             i += skip;

  3297.             if(i > 63)

  3298.                 break;

  3299.             idx = vc1_simple_progressive_8x8_zz[i++];

  3300.             block[idx] = value * scale;

  3301.             if(!v->pquantizer)

  3302.                 block[idx] += (block[idx] < 0) ? -mquant : mquant;

  3303.         }

  3304.         s->dsp.vc1_inv_trans_8x8(block);

  3305.         break;

  3306.     case TT_4X4:

  3307.         for(j = 0; j < 4; j++) {

  3308.             last = subblkpat & (1 << (3 - j));

  3309.             i = 0;

  3310.             off = (j & 1) * 4 + (j & 2) * 16;

  3311.             while (!last) {

  3312.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3313.                 i += skip;

  3314.                 if(i > 15)

  3315.                     break;

  3316.                 idx = vc1_simple_progressive_4x4_zz[i++];

  3317.                 block[idx + off] = value * scale;

  3318.                 if(!v->pquantizer)

  3319.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  3320.             }

  3321.             if(!(subblkpat & (1 << (3 - j))))

  3322.                 s->dsp.vc1_inv_trans_4x4(block, j);

  3323.         }

  3324.         break;

  3325.     case TT_8X4:

  3326.         for(j = 0; j < 2; j++) {

  3327.             last = subblkpat & (1 << (1 - j));

  3328.             i = 0;

  3329.             off = j * 32;

  3330.             while (!last) {

  3331.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3332.                 i += skip;

  3333.                 if(i > 31)

  3334.                     break;

  3335.                 if(v->profile < PROFILE_ADVANCED)

  3336.                     idx = vc1_simple_progressive_8x4_zz[i++];

  3337.                 else

  3338.                     idx = vc1_adv_progressive_8x4_zz[i++];

  3339.                 block[idx + off] = value * scale;

  3340.                 if(!v->pquantizer)

  3341.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  3342.             }

  3343.             if(!(subblkpat & (1 << (1 - j))))

  3344.                 s->dsp.vc1_inv_trans_8x4(block, j);

  3345.         }

  3346.         break;

  3347.     case TT_4X8:

  3348.         for(j = 0; j < 2; j++) {

  3349.             last = subblkpat & (1 << (1 - j));

  3350.             i = 0;

  3351.             off = j * 4;

  3352.             while (!last) {

  3353.                 vc1_decode_ac_coeff(v, &last, &skip, &value, v->codingset2);

  3354.                 i += skip;

  3355.                 if(i > 31)

  3356.                     break;

  3357.                 if(v->profile < PROFILE_ADVANCED)

  3358.                     idx = vc1_simple_progressive_4x8_zz[i++];

  3359.                 else

  3360.                     idx = vc1_adv_progressive_4x8_zz[i++];

  3361.                 block[idx + off] = value * scale;

  3362.                 if(!v->pquantizer)

  3363.                     block[idx + off] += (block[idx + off] < 0) ? -mquant : mquant;

  3364.             }

  3365.             if(!(subblkpat & (1 << (1 - j))))

  3366.                 s->dsp.vc1_inv_trans_4x8(block, j);

  3367.         }

  3368.         break;

  3369.     }

  3370.     return 0;

  3371. }

  3372. 

  3373. 

  3374. /** Decode one P-frame MB (in Simple/Main profile)

  3375.  */

  3376. static int vc1_decode_p_mb(VC1Context *v)

  3377. {

  3378.     MpegEncContext *s = &v->s;

  3379.     GetBitContext *gb = &s->gb;

  3380.     int i, j;

  3381.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3382.     int cbp; /* cbp decoding stuff */

  3383.     int mqdiff, mquant; /* MB quantization */

  3384.     int ttmb = v->ttfrm; /* MB Transform type */

  3385.     int status;

  3386. 

  3387.     static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },

  3388.       offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3389.     int mb_has_coeffs = 1; /* last_flag */

  3390.     int dmv_x, dmv_y; /* Differential MV components */

  3391.     int index, index1; /* LUT indices */

  3392.     int val, sign; /* temp values */

  3393.     int first_block = 1;

  3394.     int dst_idx, off;

  3395.     int skipped, fourmv;

  3396. 

  3397.     mquant = v->pq; /* Loosy initialization */

  3398. 

  3399.     if (v->mv_type_is_raw)

  3400.         fourmv = get_bits1(gb);

  3401.     else

  3402.         fourmv = v->mv_type_mb_plane[mb_pos];

  3403.     if (v->skip_is_raw)

  3404.         skipped = get_bits1(gb);

  3405.     else

  3406.         skipped = v->s.mbskip_table[mb_pos];

  3407. 

  3408.     s->dsp.clear_blocks(s->block[0]);

  3409. 

  3410.     if (!fourmv) /* 1MV mode */

  3411.     {

  3412.         if (!skipped)

  3413.         {

  3414.             GET_MVDATA(dmv_x, dmv_y);

  3415. 

  3416.             if (s->mb_intra) {

  3417.                 s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3418.                 s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3419.             }

  3420.             s->current_picture.mb_type[mb_pos] = s->mb_intra ? MB_TYPE_INTRA : MB_TYPE_16x16;

  3421.             vc1_pred_mv(s, 0, dmv_x, dmv_y, 1, v->range_x, v->range_y, v->mb_type[0]);

  3422. 

  3423.             /* FIXME Set DC val for inter block ? */

  3424.             if (s->mb_intra && !mb_has_coeffs)

  3425.             {

  3426.                 GET_MQUANT();

  3427.                 s->ac_pred = get_bits(gb, 1);

  3428.                 cbp = 0;

  3429.             }

  3430.             else if (mb_has_coeffs)

  3431.             {

  3432.                 if (s->mb_intra) s->ac_pred = get_bits(gb, 1);

  3433.                 cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3434.                 GET_MQUANT();

  3435.             }

  3436.             else

  3437.             {

  3438.                 mquant = v->pq;

  3439.                 cbp = 0;

  3440.             }

  3441.             s->current_picture.qscale_table[mb_pos] = mquant;

  3442. 

  3443.             if (!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3444.                 ttmb = get_vlc2(gb, vc1_ttmb_vlc[v->tt_index].table,

  3445.                                 VC1_TTMB_VLC_BITS, 2);

  3446.             if(!s->mb_intra) vc1_mc_1mv(v, 0);

  3447.             dst_idx = 0;

  3448.             for (i=0; i<6; i++)

  3449.             {

  3450.                 s->dc_val[0][s->block_index[i]] = 0;

  3451.                 dst_idx += i >> 2;

  3452.                 val = ((cbp >> (5 - i)) & 1);

  3453.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3454.                 v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3455.                 if(s->mb_intra) {

  3456.                     /* check if prediction blocks A and C are available */

  3457.                     v->a_avail = v->c_avail = 0;

  3458.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3459.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3460.                     if(i == 1 || i == 3 || s->mb_x)

  3461.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3462. 

  3463.                     vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3464.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3465.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3466.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3467.                     for(j = 0; j < 64; j++) s->block[i][j] += 128;

  3468.                     if(!v->res_fasttx && v->res_x8) for(j = 0; j < 64; j++) s->block[i][j] += 16;

  3469.                     s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3470.                     if(v->pq >= 9 && v->overlap) {

  3471.                         if(v->c_avail)

  3472.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3473.                         if(v->a_avail)

  3474.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3475.                     }

  3476.                 } else if(val) {

  3477.                     vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);

  3478.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3479.                     first_block = 0;

  3480.                     if((i<4) || !(s->flags & CODEC_FLAG_GRAY))

  3481.                         s->dsp.add_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3482.                 }

  3483.             }

  3484.         }

  3485.         else //Skipped

  3486.         {

  3487.             s->mb_intra = 0;

  3488.             for(i = 0; i < 6; i++) {

  3489.                 v->mb_type[0][s->block_index[i]] = 0;

  3490.                 s->dc_val[0][s->block_index[i]] = 0;

  3491.             }

  3492.             s->current_picture.mb_type[mb_pos] = MB_TYPE_SKIP;

  3493.             s->current_picture.qscale_table[mb_pos] = 0;

  3494.             vc1_pred_mv(s, 0, 0, 0, 1, v->range_x, v->range_y, v->mb_type[0]);

  3495.             vc1_mc_1mv(v, 0);

  3496.             return 0;

  3497.         }

  3498.     } //1MV mode

  3499.     else //4MV mode

  3500.     {

  3501.         if (!skipped /* unskipped MB */)

  3502.         {

  3503.             int intra_count = 0, coded_inter = 0;

  3504.             int is_intra[6], is_coded[6];

  3505.             /* Get CBPCY */

  3506.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3507.             for (i=0; i<6; i++)

  3508.             {

  3509.                 val = ((cbp >> (5 - i)) & 1);

  3510.                 s->dc_val[0][s->block_index[i]] = 0;

  3511.                 s->mb_intra = 0;

  3512.                 if(i < 4) {

  3513.                     dmv_x = dmv_y = 0;

  3514.                     s->mb_intra = 0;

  3515.                     mb_has_coeffs = 0;

  3516.                     if(val) {

  3517.                         GET_MVDATA(dmv_x, dmv_y);

  3518.                     }

  3519.                     vc1_pred_mv(s, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0]);

  3520.                     if(!s->mb_intra) vc1_mc_4mv_luma(v, i);

  3521.                     intra_count += s->mb_intra;

  3522.                     is_intra[i] = s->mb_intra;

  3523.                     is_coded[i] = mb_has_coeffs;

  3524.                 }

  3525.                 if(i&4){

  3526.                     is_intra[i] = (intra_count >= 3);

  3527.                     is_coded[i] = val;

  3528.                 }

  3529.                 if(i == 4) vc1_mc_4mv_chroma(v);

  3530.                 v->mb_type[0][s->block_index[i]] = is_intra[i];

  3531.                 if(!coded_inter) coded_inter = !is_intra[i] & is_coded[i];

  3532.             }

  3533.             // if there are no coded blocks then don't do anything more

  3534.             if(!intra_count && !coded_inter) return 0;

  3535.             dst_idx = 0;

  3536.             GET_MQUANT();

  3537.             s->current_picture.qscale_table[mb_pos] = mquant;

  3538.             /* test if block is intra and has pred */

  3539.             {

  3540.                 int intrapred = 0;

  3541.                 for(i=0; i<6; i++)

  3542.                     if(is_intra[i]) {

  3543.                         if(((!s->first_slice_line || (i==2 || i==3)) && v->mb_type[0][s->block_index[i] - s->block_wrap[i]])

  3544.                             || ((s->mb_x || (i==1 || i==3)) && v->mb_type[0][s->block_index[i] - 1])) {

  3545.                             intrapred = 1;

  3546.                             break;

  3547.                         }

  3548.                     }

  3549.                 if(intrapred)s->ac_pred = get_bits(gb, 1);

  3550.                 else s->ac_pred = 0;

  3551.             }

  3552.             if (!v->ttmbf && coded_inter)

  3553.                 ttmb = get_vlc2(gb, vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3554.             for (i=0; i<6; i++)

  3555.             {

  3556.                 dst_idx += i >> 2;

  3557.                 off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3558.                 s->mb_intra = is_intra[i];

  3559.                 if (is_intra[i]) {

  3560.                     /* check if prediction blocks A and C are available */

  3561.                     v->a_avail = v->c_avail = 0;

  3562.                     if(i == 2 || i == 3 || !s->first_slice_line)

  3563.                         v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3564.                     if(i == 1 || i == 3 || s->mb_x)

  3565.                         v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3566. 

  3567.                     vc1_decode_intra_block(v, s->block[i], i, is_coded[i], mquant, (i&4)?v->codingset2:v->codingset);

  3568.                     if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3569.                     s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3570.                     if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3571.                     for(j = 0; j < 64; j++) s->block[i][j] += 128;

  3572.                     if(!v->res_fasttx && v->res_x8) for(j = 0; j < 64; j++) s->block[i][j] += 16;

  3573.                     s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3574.                     if(v->pq >= 9 && v->overlap) {

  3575.                         if(v->c_avail)

  3576.                             s->dsp.vc1_h_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3577.                         if(v->a_avail)

  3578.                             s->dsp.vc1_v_overlap(s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3579.                     }

  3580.                 } else if(is_coded[i]) {

  3581.                     status = vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);

  3582.                     if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3583.                     first_block = 0;

  3584.                     if((i<4) || !(s->flags & CODEC_FLAG_GRAY))

  3585.                         s->dsp.add_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3586.                 }

  3587.             }

  3588.             return status;

  3589.         }

  3590.         else //Skipped MB

  3591.         {

  3592.             s->mb_intra = 0;

  3593.             s->current_picture.qscale_table[mb_pos] = 0;

  3594.             for (i=0; i<6; i++) {

  3595.                 v->mb_type[0][s->block_index[i]] = 0;

  3596.                 s->dc_val[0][s->block_index[i]] = 0;

  3597.             }

  3598.             for (i=0; i<4; i++)

  3599.             {

  3600.                 vc1_pred_mv(s, i, 0, 0, 0, v->range_x, v->range_y, v->mb_type[0]);

  3601.                 vc1_mc_4mv_luma(v, i);

  3602.             }

  3603.             vc1_mc_4mv_chroma(v);

  3604.             s->current_picture.qscale_table[mb_pos] = 0;

  3605.             return 0;

  3606.         }

  3607.     }

  3608. 

  3609.     /* Should never happen */

  3610.     return -1;

  3611. }

  3612. 

  3613. /** Decode one B-frame MB (in Main profile)

  3614.  */

  3615. static void vc1_decode_b_mb(VC1Context *v)

  3616. {

  3617.     MpegEncContext *s = &v->s;

  3618.     GetBitContext *gb = &s->gb;

  3619.     int i, j;

  3620.     int mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3621.     int cbp = 0; /* cbp decoding stuff */

  3622.     int mqdiff, mquant; /* MB quantization */

  3623.     int ttmb = v->ttfrm; /* MB Transform type */

  3624. 

  3625.     static const int size_table[6] = { 0, 2, 3, 4, 5, 8 },

  3626.       offset_table[6] = { 0, 1, 3, 7, 15, 31 };

  3627.     int mb_has_coeffs = 0; /* last_flag */

  3628.     int index, index1; /* LUT indices */

  3629.     int val, sign; /* temp values */

  3630.     int first_block = 1;

  3631.     int dst_idx, off;

  3632.     int skipped, direct;

  3633.     int dmv_x[2], dmv_y[2];

  3634.     int bmvtype = BMV_TYPE_BACKWARD;

  3635. 

  3636.     mquant = v->pq; /* Loosy initialization */

  3637.     s->mb_intra = 0;

  3638. 

  3639.     if (v->dmb_is_raw)

  3640.         direct = get_bits1(gb);

  3641.     else

  3642.         direct = v->direct_mb_plane[mb_pos];

  3643.     if (v->skip_is_raw)

  3644.         skipped = get_bits1(gb);

  3645.     else

  3646.         skipped = v->s.mbskip_table[mb_pos];

  3647. 

  3648.     s->dsp.clear_blocks(s->block[0]);

  3649.     dmv_x[0] = dmv_x[1] = dmv_y[0] = dmv_y[1] = 0;

  3650.     for(i = 0; i < 6; i++) {

  3651.         v->mb_type[0][s->block_index[i]] = 0;

  3652.         s->dc_val[0][s->block_index[i]] = 0;

  3653.     }

  3654.     s->current_picture.qscale_table[mb_pos] = 0;

  3655. 

  3656.     if (!direct) {

  3657.         if (!skipped) {

  3658.             GET_MVDATA(dmv_x[0], dmv_y[0]);

  3659.             dmv_x[1] = dmv_x[0];

  3660.             dmv_y[1] = dmv_y[0];

  3661.         }

  3662.         if(skipped || !s->mb_intra) {

  3663.             bmvtype = decode012(gb);

  3664.             switch(bmvtype) {

  3665.             case 0:

  3666.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_BACKWARD : BMV_TYPE_FORWARD;

  3667.                 break;

  3668.             case 1:

  3669.                 bmvtype = (v->bfraction >= (B_FRACTION_DEN/2)) ? BMV_TYPE_FORWARD : BMV_TYPE_BACKWARD;

  3670.                 break;

  3671.             case 2:

  3672.                 bmvtype = BMV_TYPE_INTERPOLATED;

  3673.                 dmv_x[0] = dmv_y[0] = 0;

  3674.             }

  3675.         }

  3676.     }

  3677.     for(i = 0; i < 6; i++)

  3678.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3679. 

  3680.     if (skipped) {

  3681.         if(direct) bmvtype = BMV_TYPE_INTERPOLATED;

  3682.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3683.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3684.         return;

  3685.     }

  3686.     if (direct) {

  3687.         cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3688.         GET_MQUANT();

  3689.         s->mb_intra = 0;

  3690.         mb_has_coeffs = 0;

  3691.         s->current_picture.qscale_table[mb_pos] = mquant;

  3692.         if(!v->ttmbf)

  3693.             ttmb = get_vlc2(gb, vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3694.         dmv_x[0] = dmv_y[0] = dmv_x[1] = dmv_y[1] = 0;

  3695.         vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3696.         vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3697.     } else {

  3698.         if(!mb_has_coeffs && !s->mb_intra) {

  3699.             /* no coded blocks - effectively skipped */

  3700.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3701.             vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3702.             return;

  3703.         }

  3704.         if(s->mb_intra && !mb_has_coeffs) {

  3705.             GET_MQUANT();

  3706.             s->current_picture.qscale_table[mb_pos] = mquant;

  3707.             s->ac_pred = get_bits1(gb);

  3708.             cbp = 0;

  3709.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3710.         } else {

  3711.             if(bmvtype == BMV_TYPE_INTERPOLATED) {

  3712.                 GET_MVDATA(dmv_x[0], dmv_y[0]);

  3713.                 if(!mb_has_coeffs) {

  3714.                     /* interpolated skipped block */

  3715.                     vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3716.                     vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3717.                     return;

  3718.                 }

  3719.             }

  3720.             vc1_pred_b_mv(v, dmv_x, dmv_y, direct, bmvtype);

  3721.             if(!s->mb_intra) {

  3722.                 vc1_b_mc(v, dmv_x, dmv_y, direct, bmvtype);

  3723.             }

  3724.             if(s->mb_intra)

  3725.                 s->ac_pred = get_bits1(gb);

  3726.             cbp = get_vlc2(&v->s.gb, v->cbpcy_vlc->table, VC1_CBPCY_P_VLC_BITS, 2);

  3727.             GET_MQUANT();

  3728.             s->current_picture.qscale_table[mb_pos] = mquant;

  3729.             if(!v->ttmbf && !s->mb_intra && mb_has_coeffs)

  3730.                 ttmb = get_vlc2(gb, vc1_ttmb_vlc[v->tt_index].table, VC1_TTMB_VLC_BITS, 2);

  3731.         }

  3732.     }

  3733.     dst_idx = 0;

  3734.     for (i=0; i<6; i++)

  3735.     {

  3736.         s->dc_val[0][s->block_index[i]] = 0;

  3737.         dst_idx += i >> 2;

  3738.         val = ((cbp >> (5 - i)) & 1);

  3739.         off = (i & 4) ? 0 : ((i & 1) * 8 + (i & 2) * 4 * s->linesize);

  3740.         v->mb_type[0][s->block_index[i]] = s->mb_intra;

  3741.         if(s->mb_intra) {

  3742.             /* check if prediction blocks A and C are available */

  3743.             v->a_avail = v->c_avail = 0;

  3744.             if(i == 2 || i == 3 || !s->first_slice_line)

  3745.                 v->a_avail = v->mb_type[0][s->block_index[i] - s->block_wrap[i]];

  3746.             if(i == 1 || i == 3 || s->mb_x)

  3747.                 v->c_avail = v->mb_type[0][s->block_index[i] - 1];

  3748. 

  3749.             vc1_decode_intra_block(v, s->block[i], i, val, mquant, (i&4)?v->codingset2:v->codingset);

  3750.             if((i>3) && (s->flags & CODEC_FLAG_GRAY)) continue;

  3751.             s->dsp.vc1_inv_trans_8x8(s->block[i]);

  3752.             if(v->rangeredfrm) for(j = 0; j < 64; j++) s->block[i][j] <<= 1;

  3753.             for(j = 0; j < 64; j++) s->block[i][j] += 128;

  3754.             s->dsp.put_pixels_clamped(s->block[i], s->dest[dst_idx] + off, s->linesize >> ((i & 4) >> 2));

  3755.         } else if(val) {

  3756.             vc1_decode_p_block(v, s->block[i], i, mquant, ttmb, first_block);

  3757.             if(!v->ttmbf && ttmb < 8) ttmb = -1;

  3758.             first_block = 0;

  3759.             if((i<4) || !(s->flags & CODEC_FLAG_GRAY))

  3760.                 s->dsp.add_pixels_clamped(s->block[i], s->dest[dst_idx] + off, (i&4)?s->uvlinesize:s->linesize);

  3761.         }

  3762.     }

  3763. }

  3764. 

  3765. /** Decode blocks of I-frame

  3766.  */

  3767. static void vc1_decode_i_blocks(VC1Context *v)

  3768. {

  3769.     int k, j;

  3770.     MpegEncContext *s = &v->s;

  3771.     int cbp, val;

  3772.     uint8_t *coded_val;

  3773.     int mb_pos;

  3774. 

  3775.     /* select codingmode used for VLC tables selection */

  3776.     switch(v->y_ac_table_index){

  3777.     case 0:

  3778.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3779.         break;

  3780.     case 1:

  3781.         v->codingset = CS_HIGH_MOT_INTRA;

  3782.         break;

  3783.     case 2:

  3784.         v->codingset = CS_MID_RATE_INTRA;

  3785.         break;

  3786.     }

  3787. 

  3788.     switch(v->c_ac_table_index){

  3789.     case 0:

  3790.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3791.         break;

  3792.     case 1:

  3793.         v->codingset2 = CS_HIGH_MOT_INTER;

  3794.         break;

  3795.     case 2:

  3796.         v->codingset2 = CS_MID_RATE_INTER;

  3797.         break;

  3798.     }

  3799. 

  3800.     /* Set DC scale - y and c use the same */

  3801.     s->y_dc_scale = s->y_dc_scale_table[v->pq];

  3802.     s->c_dc_scale = s->c_dc_scale_table[v->pq];

  3803. 

  3804.     //do frame decode

  3805.     s->mb_x = s->mb_y = 0;

  3806.     s->mb_intra = 1;

  3807.     s->first_slice_line = 1;

  3808.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3809.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3810.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3811.             ff_init_block_index(s);

  3812.             ff_update_block_index(s);

  3813.             s->dsp.clear_blocks(s->block[0]);

  3814.             mb_pos = s->mb_x + s->mb_y * s->mb_width;

  3815.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3816.             s->current_picture.qscale_table[mb_pos] = v->pq;

  3817.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3818.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3819. 

  3820.             // do actual MB decoding and displaying

  3821.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3822.             v->s.ac_pred = get_bits(&v->s.gb, 1);

  3823. 

  3824.             for(k = 0; k < 6; k++) {

  3825.                 val = ((cbp >> (5 - k)) & 1);

  3826. 

  3827.                 if (k < 4) {

  3828.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3829.                     val = val ^ pred;

  3830.                     *coded_val = val;

  3831.                 }

  3832.                 cbp |= val << (5 - k);

  3833. 

  3834.                 vc1_decode_i_block(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2);

  3835. 

  3836.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3837.                 if(v->pq >= 9 && v->overlap) {

  3838.                     for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3839.                 }

  3840.             }

  3841. 

  3842.             vc1_put_block(v, s->block);

  3843.             if(v->pq >= 9 && v->overlap) {

  3844.                 if(s->mb_x) {

  3845.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3846.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3847.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3848.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3849.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3850.                     }

  3851.                 }

  3852.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3853.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3854.                 if(!s->first_slice_line) {

  3855.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3856.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3857.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3858.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3859.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3860.                     }

  3861.                 }

  3862.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3863.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3864.             }

  3865. 

  3866.             if(get_bits_count(&s->gb) > v->bits) {

  3867.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3868.                 return;

  3869.             }

  3870.         }

  3871.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  3872.         s->first_slice_line = 0;

  3873.     }

  3874. }

  3875. 

  3876. /** Decode blocks of I-frame for advanced profile

  3877.  */

  3878. static void vc1_decode_i_blocks_adv(VC1Context *v)

  3879. {

  3880.     int k, j;

  3881.     MpegEncContext *s = &v->s;

  3882.     int cbp, val;

  3883.     uint8_t *coded_val;

  3884.     int mb_pos;

  3885.     int mquant = v->pq;

  3886.     int mqdiff;

  3887.     int overlap;

  3888.     GetBitContext *gb = &s->gb;

  3889. 

  3890.     /* select codingmode used for VLC tables selection */

  3891.     switch(v->y_ac_table_index){

  3892.     case 0:

  3893.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  3894.         break;

  3895.     case 1:

  3896.         v->codingset = CS_HIGH_MOT_INTRA;

  3897.         break;

  3898.     case 2:

  3899.         v->codingset = CS_MID_RATE_INTRA;

  3900.         break;

  3901.     }

  3902. 

  3903.     switch(v->c_ac_table_index){

  3904.     case 0:

  3905.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  3906.         break;

  3907.     case 1:

  3908.         v->codingset2 = CS_HIGH_MOT_INTER;

  3909.         break;

  3910.     case 2:

  3911.         v->codingset2 = CS_MID_RATE_INTER;

  3912.         break;

  3913.     }

  3914. 

  3915.     //do frame decode

  3916.     s->mb_x = s->mb_y = 0;

  3917.     s->mb_intra = 1;

  3918.     s->first_slice_line = 1;

  3919.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  3920.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  3921.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  3922.             ff_init_block_index(s);

  3923.             ff_update_block_index(s);

  3924.             s->dsp.clear_blocks(s->block[0]);

  3925.             mb_pos = s->mb_x + s->mb_y * s->mb_stride;

  3926.             s->current_picture.mb_type[mb_pos] = MB_TYPE_INTRA;

  3927.             s->current_picture.motion_val[1][s->block_index[0]][0] = 0;

  3928.             s->current_picture.motion_val[1][s->block_index[0]][1] = 0;

  3929. 

  3930.             // do actual MB decoding and displaying

  3931.             cbp = get_vlc2(&v->s.gb, ff_msmp4_mb_i_vlc.table, MB_INTRA_VLC_BITS, 2);

  3932.             if(v->acpred_is_raw)

  3933.                 v->s.ac_pred = get_bits(&v->s.gb, 1);

  3934.             else

  3935.                 v->s.ac_pred = v->acpred_plane[mb_pos];

  3936. 

  3937.             if(v->condover == CONDOVER_SELECT) {

  3938.                 if(v->overflg_is_raw)

  3939.                     overlap = get_bits(&v->s.gb, 1);

  3940.                 else

  3941.                     overlap = v->over_flags_plane[mb_pos];

  3942.             } else

  3943.                 overlap = (v->condover == CONDOVER_ALL);

  3944. 

  3945.             GET_MQUANT();

  3946. 

  3947.             s->current_picture.qscale_table[mb_pos] = mquant;

  3948.             /* Set DC scale - y and c use the same */

  3949.             s->y_dc_scale = s->y_dc_scale_table[mquant];

  3950.             s->c_dc_scale = s->c_dc_scale_table[mquant];

  3951. 

  3952.             for(k = 0; k < 6; k++) {

  3953.                 val = ((cbp >> (5 - k)) & 1);

  3954. 

  3955.                 if (k < 4) {

  3956.                     int pred = vc1_coded_block_pred(&v->s, k, &coded_val);

  3957.                     val = val ^ pred;

  3958.                     *coded_val = val;

  3959.                 }

  3960.                 cbp |= val << (5 - k);

  3961. 

  3962.                 v->a_avail = !s->first_slice_line || (k==2 || k==3);

  3963.                 v->c_avail = !!s->mb_x || (k==1 || k==3);

  3964. 

  3965.                 vc1_decode_i_block_adv(v, s->block[k], k, val, (k<4)? v->codingset : v->codingset2, mquant);

  3966. 

  3967.                 s->dsp.vc1_inv_trans_8x8(s->block[k]);

  3968.                 for(j = 0; j < 64; j++) s->block[k][j] += 128;

  3969.             }

  3970. 

  3971.             vc1_put_block(v, s->block);

  3972.             if(overlap) {

  3973.                 if(s->mb_x) {

  3974.                     s->dsp.vc1_h_overlap(s->dest[0], s->linesize);

  3975.                     s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3976.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3977.                         s->dsp.vc1_h_overlap(s->dest[1], s->uvlinesize);

  3978.                         s->dsp.vc1_h_overlap(s->dest[2], s->uvlinesize);

  3979.                     }

  3980.                 }

  3981.                 s->dsp.vc1_h_overlap(s->dest[0] + 8, s->linesize);

  3982.                 s->dsp.vc1_h_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3983.                 if(!s->first_slice_line) {

  3984.                     s->dsp.vc1_v_overlap(s->dest[0], s->linesize);

  3985.                     s->dsp.vc1_v_overlap(s->dest[0] + 8, s->linesize);

  3986.                     if(!(s->flags & CODEC_FLAG_GRAY)) {

  3987.                         s->dsp.vc1_v_overlap(s->dest[1], s->uvlinesize);

  3988.                         s->dsp.vc1_v_overlap(s->dest[2], s->uvlinesize);

  3989.                     }

  3990.                 }

  3991.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize, s->linesize);

  3992.                 s->dsp.vc1_v_overlap(s->dest[0] + 8 * s->linesize + 8, s->linesize);

  3993.             }

  3994. 

  3995.             if(get_bits_count(&s->gb) > v->bits) {

  3996.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i\n", get_bits_count(&s->gb), v->bits);

  3997.                 return;

  3998.             }

  3999.         }

  4000.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  4001.         s->first_slice_line = 0;

  4002.     }

  4003. }

  4004. 

  4005. static void vc1_decode_p_blocks(VC1Context *v)

  4006. {

  4007.     MpegEncContext *s = &v->s;

  4008. 

  4009.     /* select codingmode used for VLC tables selection */

  4010.     switch(v->c_ac_table_index){

  4011.     case 0:

  4012.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  4013.         break;

  4014.     case 1:

  4015.         v->codingset = CS_HIGH_MOT_INTRA;

  4016.         break;

  4017.     case 2:

  4018.         v->codingset = CS_MID_RATE_INTRA;

  4019.         break;

  4020.     }

  4021. 

  4022.     switch(v->c_ac_table_index){

  4023.     case 0:

  4024.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  4025.         break;

  4026.     case 1:

  4027.         v->codingset2 = CS_HIGH_MOT_INTER;

  4028.         break;

  4029.     case 2:

  4030.         v->codingset2 = CS_MID_RATE_INTER;

  4031.         break;

  4032.     }

  4033. 

  4034.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  4035.     s->first_slice_line = 1;

  4036.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  4037.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  4038.             ff_init_block_index(s);

  4039.             ff_update_block_index(s);

  4040.             s->dsp.clear_blocks(s->block[0]);

  4041. 

  4042.             vc1_decode_p_mb(v);

  4043.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  4044.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n", get_bits_count(&s->gb), v->bits,s->mb_x,s->mb_y);

  4045.                 return;

  4046.             }

  4047.         }

  4048.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  4049.         s->first_slice_line = 0;

  4050.     }

  4051. }

  4052. 

  4053. static void vc1_decode_b_blocks(VC1Context *v)

  4054. {

  4055.     MpegEncContext *s = &v->s;

  4056. 

  4057.     /* select codingmode used for VLC tables selection */

  4058.     switch(v->c_ac_table_index){

  4059.     case 0:

  4060.         v->codingset = (v->pqindex <= 8) ? CS_HIGH_RATE_INTRA : CS_LOW_MOT_INTRA;

  4061.         break;

  4062.     case 1:

  4063.         v->codingset = CS_HIGH_MOT_INTRA;

  4064.         break;

  4065.     case 2:

  4066.         v->codingset = CS_MID_RATE_INTRA;

  4067.         break;

  4068.     }

  4069. 

  4070.     switch(v->c_ac_table_index){

  4071.     case 0:

  4072.         v->codingset2 = (v->pqindex <= 8) ? CS_HIGH_RATE_INTER : CS_LOW_MOT_INTER;

  4073.         break;

  4074.     case 1:

  4075.         v->codingset2 = CS_HIGH_MOT_INTER;

  4076.         break;

  4077.     case 2:

  4078.         v->codingset2 = CS_MID_RATE_INTER;

  4079.         break;

  4080.     }

  4081. 

  4082.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  4083.     s->first_slice_line = 1;

  4084.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  4085.         for(s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  4086.             ff_init_block_index(s);

  4087.             ff_update_block_index(s);

  4088.             s->dsp.clear_blocks(s->block[0]);

  4089. 

  4090.             vc1_decode_b_mb(v);

  4091.             if(get_bits_count(&s->gb) > v->bits || get_bits_count(&s->gb) < 0) {

  4092.                 av_log(s->avctx, AV_LOG_ERROR, "Bits overconsumption: %i > %i at %ix%i\n", get_bits_count(&s->gb), v->bits,s->mb_x,s->mb_y);

  4093.                 return;

  4094.             }

  4095.         }

  4096.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  4097.         s->first_slice_line = 0;

  4098.     }

  4099. }

  4100. 

  4101. static void vc1_decode_skip_blocks(VC1Context *v)

  4102. {

  4103.     MpegEncContext *s = &v->s;

  4104. 

  4105.     ff_er_add_slice(s, 0, 0, s->mb_width - 1, s->mb_height - 1, (AC_END|DC_END|MV_END));

  4106.     s->first_slice_line = 1;

  4107.     for(s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  4108.         s->mb_x = 0;

  4109.         ff_init_block_index(s);

  4110.         ff_update_block_index(s);

  4111.         memcpy(s->dest[0], s->last_picture.data[0] + s->mb_y * 16 * s->linesize, s->linesize * 16);

  4112.         memcpy(s->dest[1], s->last_picture.data[1] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  4113.         memcpy(s->dest[2], s->last_picture.data[2] + s->mb_y * 8 * s->uvlinesize, s->uvlinesize * 8);

  4114.         ff_draw_horiz_band(s, s->mb_y * 16, 16);

  4115.         s->first_slice_line = 0;

  4116.     }

  4117.     s->pict_type = P_TYPE;

  4118. }

  4119. 

  4120. static void vc1_decode_blocks(VC1Context *v)

  4121. {

  4122. 

  4123.     v->s.esc3_level_length = 0;

  4124. 

  4125.     switch(v->s.pict_type) {

  4126.     case I_TYPE:

  4127.         if(v->profile == PROFILE_ADVANCED)

  4128.             vc1_decode_i_blocks_adv(v);

  4129.         else

  4130.             vc1_decode_i_blocks(v);

  4131.         break;

  4132.     case P_TYPE:

  4133.         if(v->p_frame_skipped)

  4134.             vc1_decode_skip_blocks(v);

  4135.         else

  4136.             vc1_decode_p_blocks(v);

  4137.         break;

  4138.     case B_TYPE:

  4139.         if(v->bi_type){

  4140.             if(v->profile == PROFILE_ADVANCED)

  4141.                 vc1_decode_i_blocks_adv(v);

  4142.             else

  4143.                 vc1_decode_i_blocks(v);

  4144.         }else

  4145.             vc1_decode_b_blocks(v);

  4146.         break;

  4147.     }

  4148. }

  4149. 

  4150. #define IS_MARKER(x) (((x) & ~0xFF) == VC1_CODE_RES0)

  4151. 

  4152. /** Find VC-1 marker in buffer

  4153.  * @return position where next marker starts or end of buffer if no marker found

  4154.  */

  4155. static av_always_inline uint8_t* find_next_marker(uint8_t *src, uint8_t *end)

  4156. {

  4157.     uint32_t mrk = 0xFFFFFFFF;

  4158. 

  4159.     if(end-src < 4) return end;

  4160.     while(src < end){

  4161.         mrk = (mrk << 8) | *src++;

  4162.         if(IS_MARKER(mrk))

  4163.             return src-4;

  4164.     }

  4165.     return end;

  4166. }

  4167. 

  4168. static av_always_inline int vc1_unescape_buffer(uint8_t *src, int size, uint8_t *dst)

  4169. {

  4170.     int dsize = 0, i;

  4171. 

  4172.     if(size < 4){

  4173.         for(dsize = 0; dsize < size; dsize++) *dst++ = *src++;

  4174.         return size;

  4175.     }

  4176.     for(i = 0; i < size; i++, src++) {

  4177.         if(src[0] == 3 && i >= 2 && !src[-1] && !src[-2] && i < size-1 && src[1] < 4) {

  4178.             dst[dsize++] = src[1];

  4179.             src++;

  4180.             i++;

  4181.         } else

  4182.             dst[dsize++] = *src;

  4183.     }

  4184.     return dsize;

  4185. }

  4186. 

  4187. /** Initialize a VC1/WMV3 decoder

  4188.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  4189.  * @todo TODO: Decypher remaining bits in extra_data

  4190.  */

  4191. static int vc1_decode_init(AVCodecContext *avctx)

  4192. {

  4193.     VC1Context *v = avctx->priv_data;

  4194.     MpegEncContext *s = &v->s;

  4195.     GetBitContext gb;

  4196. 

  4197.     if (!avctx->extradata_size || !avctx->extradata) return -1;

  4198.     if (!(avctx->flags & CODEC_FLAG_GRAY))

  4199.         avctx->pix_fmt = PIX_FMT_YUV420P;

  4200.     else

  4201.         avctx->pix_fmt = PIX_FMT_GRAY8;

  4202.     v->s.avctx = avctx;

  4203.     avctx->flags |= CODEC_FLAG_EMU_EDGE;

  4204.     v->s.flags |= CODEC_FLAG_EMU_EDGE;

  4205. 

  4206.     if(ff_h263_decode_init(avctx) < 0)

  4207.         return -1;

  4208.     if (vc1_init_common(v) < 0) return -1;

  4209. 

  4210.     avctx->coded_width = avctx->width;

  4211.     avctx->coded_height = avctx->height;

  4212.     if (avctx->codec_id == CODEC_ID_WMV3)

  4213.     {

  4214.         int count = 0;

  4215. 

  4216.         // looks like WMV3 has a sequence header stored in the extradata

  4217.         // advanced sequence header may be before the first frame

  4218.         // the last byte of the extradata is a version number, 1 for the

  4219.         // samples we can decode

  4220. 

  4221.         init_get_bits(&gb, avctx->extradata, avctx->extradata_size*8);

  4222. 

  4223.         if (decode_sequence_header(avctx, &gb) < 0)

  4224.           return -1;

  4225. 

  4226.         count = avctx->extradata_size*8 - get_bits_count(&gb);

  4227.         if (count>0)

  4228.         {

  4229.             av_log(avctx, AV_LOG_INFO, "Extra data: %i bits left, value: %X\n",

  4230.                    count, get_bits(&gb, count));

  4231.         }

  4232.         else if (count < 0)

  4233.         {

  4234.             av_log(avctx, AV_LOG_INFO, "Read %i bits in overflow\n", -count);

  4235.         }

  4236.     } else { // VC1/WVC1

  4237.         uint8_t *start = avctx->extradata, *end = avctx->extradata + avctx->extradata_size;

  4238.         uint8_t *next; int size, buf2_size;

  4239.         uint8_t *buf2 = NULL;

  4240.         int seq_inited = 0, ep_inited = 0;

  4241. 

  4242.         if(avctx->extradata_size < 16) {

  4243.             av_log(avctx, AV_LOG_ERROR, "Extradata size too small: %i\n", avctx->extradata_size);

  4244.             return -1;

  4245.         }

  4246. 

  4247.         buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4248.         if(start[0]) start++; // in WVC1 extradata first byte is its size

  4249.         next = start;

  4250.         for(; next < end; start = next){

  4251.             next = find_next_marker(start + 4, end);

  4252.             size = next - start - 4;

  4253.             if(size <= 0) continue;

  4254.             buf2_size = vc1_unescape_buffer(start + 4, size, buf2);

  4255.             init_get_bits(&gb, buf2, buf2_size * 8);

  4256.             switch(AV_RB32(start)){

  4257.             case VC1_CODE_SEQHDR:

  4258.                 if(decode_sequence_header(avctx, &gb) < 0){

  4259.                     av_free(buf2);

  4260.                     return -1;

  4261.                 }

  4262.                 seq_inited = 1;

  4263.                 break;

  4264.             case VC1_CODE_ENTRYPOINT:

  4265.                 if(decode_entry_point(avctx, &gb) < 0){

  4266.                     av_free(buf2);

  4267.                     return -1;

  4268.                 }

  4269.                 ep_inited = 1;

  4270.                 break;

  4271.             }

  4272.         }

  4273.         av_free(buf2);

  4274.         if(!seq_inited || !ep_inited){

  4275.             av_log(avctx, AV_LOG_ERROR, "Incomplete extradata\n");

  4276.             return -1;

  4277.         }

  4278.     }

  4279.     avctx->has_b_frames= !!(avctx->max_b_frames);

  4280.     s->low_delay = !avctx->has_b_frames;

  4281. 

  4282.     s->mb_width = (avctx->coded_width+15)>>4;

  4283.     s->mb_height = (avctx->coded_height+15)>>4;

  4284. 

  4285.     /* Allocate mb bitplanes */

  4286.     v->mv_type_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4287.     v->direct_mb_plane = av_malloc(s->mb_stride * s->mb_height);

  4288.     v->acpred_plane = av_malloc(s->mb_stride * s->mb_height);

  4289.     v->over_flags_plane = av_malloc(s->mb_stride * s->mb_height);

  4290. 

  4291.     /* allocate block type info in that way so it could be used with s->block_index[] */

  4292.     v->mb_type_base = av_malloc(s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride * (s->mb_height + 1) * 2);

  4293.     v->mb_type[0] = v->mb_type_base + s->b8_stride + 1;

  4294.     v->mb_type[1] = v->mb_type_base + s->b8_stride * (s->mb_height * 2 + 1) + s->mb_stride + 1;

  4295.     v->mb_type[2] = v->mb_type[1] + s->mb_stride * (s->mb_height + 1);

  4296. 

  4297.     /* Init coded blocks info */

  4298.     if (v->profile == PROFILE_ADVANCED)

  4299.     {

  4300. //        if (alloc_bitplane(&v->over_flags_plane, s->mb_width, s->mb_height) < 0)

  4301. //            return -1;

  4302. //        if (alloc_bitplane(&v->ac_pred_plane, s->mb_width, s->mb_height) < 0)

  4303. //            return -1;

  4304.     }

  4305. 

  4306.     return 0;

  4307. }

  4308. 

  4309. 

  4310. /** Decode a VC1/WMV3 frame

  4311.  * @todo TODO: Handle VC-1 IDUs (Transport level?)

  4312.  */

  4313. static int vc1_decode_frame(AVCodecContext *avctx,

  4314.                             void *data, int *data_size,

  4315.                             uint8_t *buf, int buf_size)

  4316. {

  4317.     VC1Context *v = avctx->priv_data;

  4318.     MpegEncContext *s = &v->s;

  4319.     AVFrame *pict = data;

  4320.     uint8_t *buf2 = NULL;

  4321. 

  4322.     /* no supplementary picture */

  4323.     if (buf_size == 0) {

  4324.         /* special case for last picture */

  4325.         if (s->low_delay==0 && s->next_picture_ptr) {

  4326.             *pict= *(AVFrame*)s->next_picture_ptr;

  4327.             s->next_picture_ptr= NULL;

  4328. 

  4329.             *data_size = sizeof(AVFrame);

  4330.         }

  4331. 

  4332.         return 0;

  4333.     }

  4334. 

  4335.     //we need to set current_picture_ptr before reading the header, otherwise we cant store anyting im there

  4336.     if(s->current_picture_ptr==NULL || s->current_picture_ptr->data[0]){

  4337.         int i= ff_find_unused_picture(s, 0);

  4338.         s->current_picture_ptr= &s->picture[i];

  4339.     }

  4340. 

  4341.     //for advanced profile we may need to parse and unescape data

  4342.     if (avctx->codec_id == CODEC_ID_VC1) {

  4343.         int buf_size2 = 0;

  4344.         buf2 = av_mallocz(buf_size + FF_INPUT_BUFFER_PADDING_SIZE);

  4345. 

  4346.         if(IS_MARKER(AV_RB32(buf))){ /* frame starts with marker and needs to be parsed */

  4347.             uint8_t *dst = buf2, *start, *end, *next;

  4348.             int size;

  4349. 

  4350.             next = buf;

  4351.             for(start = buf, end = buf + buf_size; next < end; start = next){

  4352.                 next = find_next_marker(start + 4, end);

  4353.                 size = next - start - 4;

  4354.                 if(size <= 0) continue;

  4355.                 switch(AV_RB32(start)){

  4356.                 case VC1_CODE_FRAME:

  4357.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4358.                     break;

  4359.                 case VC1_CODE_ENTRYPOINT: /* it should be before frame data */

  4360.                     buf_size2 = vc1_unescape_buffer(start + 4, size, buf2);

  4361.                     init_get_bits(&s->gb, buf2, buf_size2*8);

  4362.                     decode_entry_point(avctx, &s->gb);

  4363.                     break;

  4364.                 case VC1_CODE_SLICE:

  4365.                     av_log(avctx, AV_LOG_ERROR, "Sliced decoding is not implemented (yet)\n");

  4366.                     av_free(buf2);

  4367.                     return -1;

  4368.                 }

  4369.             }

  4370.         }else if(v->interlace && ((buf[0] & 0xC0) == 0xC0)){ /* WVC1 interlaced stores both fields divided by marker */

  4371.             uint8_t *divider;

  4372. 

  4373.             divider = find_next_marker(buf, buf + buf_size);

  4374.             if((divider == (buf + buf_size)) || AV_RB32(divider) != VC1_CODE_FIELD){

  4375.                 av_log(avctx, AV_LOG_ERROR, "Error in WVC1 interlaced frame\n");

  4376.                 return -1;

  4377.             }

  4378. 

  4379.             buf_size2 = vc1_unescape_buffer(buf, divider - buf, buf2);

  4380.             // TODO

  4381.             av_free(buf2);return -1;

  4382.         }else{

  4383.             buf_size2 = vc1_unescape_buffer(buf, buf_size, buf2);

  4384.         }

  4385.         init_get_bits(&s->gb, buf2, buf_size2*8);

  4386.     } else

  4387.         init_get_bits(&s->gb, buf, buf_size*8);

  4388.     // do parse frame header

  4389.     if(v->profile < PROFILE_ADVANCED) {

  4390.         if(vc1_parse_frame_header(v, &s->gb) == -1) {

  4391.             av_free(buf2);

  4392.             return -1;

  4393.         }

  4394.     } else {

  4395.         if(vc1_parse_frame_header_adv(v, &s->gb) == -1) {

  4396.             av_free(buf2);

  4397.             return -1;

  4398.         }

  4399.     }

  4400. 

  4401.     if(s->pict_type != I_TYPE && !v->res_rtm_flag){

  4402.         av_free(buf2);

  4403.         return -1;

  4404.     }

  4405. 

  4406.     // for hurry_up==5

  4407.     s->current_picture.pict_type= s->pict_type;

  4408.     s->current_picture.key_frame= s->pict_type == I_TYPE;

  4409. 

  4410.     /* skip B-frames if we don't have reference frames */

  4411.     if(s->last_picture_ptr==NULL && (s->pict_type==B_TYPE || s->dropable)){

  4412.         av_free(buf2);

  4413.         return -1;//buf_size;

  4414.     }

  4415.     /* skip b frames if we are in a hurry */

  4416.     if(avctx->hurry_up && s->pict_type==B_TYPE) return -1;//buf_size;

  4417.     if(   (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==B_TYPE)

  4418.        || (avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=I_TYPE)

  4419.        ||  avctx->skip_frame >= AVDISCARD_ALL) {

  4420.         av_free(buf2);

  4421.         return buf_size;

  4422.     }

  4423.     /* skip everything if we are in a hurry>=5 */

  4424.     if(avctx->hurry_up>=5) {

  4425.         av_free(buf2);

  4426.         return -1;//buf_size;

  4427.     }

  4428. 

  4429.     if(s->next_p_frame_damaged){

  4430.         if(s->pict_type==B_TYPE)

  4431.             return buf_size;

  4432.         else

  4433.             s->next_p_frame_damaged=0;

  4434.     }

  4435. 

  4436.     if(MPV_frame_start(s, avctx) < 0) {

  4437.         av_free(buf2);

  4438.         return -1;

  4439.     }

  4440. 

  4441.     ff_er_frame_start(s);

  4442. 

  4443.     v->bits = buf_size * 8;

  4444.     vc1_decode_blocks(v);

  4445. //av_log(s->avctx, AV_LOG_INFO, "Consumed %i/%i bits\n", get_bits_count(&s->gb), buf_size*8);

  4446. //  if(get_bits_count(&s->gb) > buf_size * 8)

  4447. //      return -1;

  4448.     ff_er_frame_end(s);

  4449. 

  4450.     MPV_frame_end(s);

  4451. 

  4452. assert(s->current_picture.pict_type == s->current_picture_ptr->pict_type);

  4453. assert(s->current_picture.pict_type == s->pict_type);

  4454.     if (s->pict_type == B_TYPE || s->low_delay) {

  4455.         *pict= *(AVFrame*)s->current_picture_ptr;

  4456.     } else if (s->last_picture_ptr != NULL) {

  4457.         *pict= *(AVFrame*)s->last_picture_ptr;

  4458.     }

  4459. 

  4460.     if(s->last_picture_ptr || s->low_delay){

  4461.         *data_size = sizeof(AVFrame);

  4462.         ff_print_debug_info(s, pict);

  4463.     }

  4464. 

  4465.     /* Return the Picture timestamp as the frame number */

  4466.     /* we substract 1 because it is added on utils.c    */

  4467.     avctx->frame_number = s->picture_number - 1;

  4468. 

  4469.     av_free(buf2);

  4470.     return buf_size;

  4471. }

  4472. 

  4473. 

  4474. /** Close a VC1/WMV3 decoder

  4475.  * @warning Initial try at using MpegEncContext stuff

  4476.  */

  4477. static int vc1_decode_end(AVCodecContext *avctx)

  4478. {

  4479.     VC1Context *v = avctx->priv_data;

  4480. 

  4481.     av_freep(&v->hrd_rate);

  4482.     av_freep(&v->hrd_buffer);

  4483.     MPV_common_end(&v->s);

  4484.     av_freep(&v->mv_type_mb_plane);

  4485.     av_freep(&v->direct_mb_plane);

  4486.     av_freep(&v->acpred_plane);

  4487.     av_freep(&v->over_flags_plane);

  4488.     av_freep(&v->mb_type_base);

  4489.     return 0;

  4490. }

  4491. 

  4492. 

  4493. AVCodec vc1_decoder = {

  4494.     "vc1",

  4495.     CODEC_TYPE_VIDEO,

  4496.     CODEC_ID_VC1,

  4497.     sizeof(VC1Context),

  4498.     vc1_decode_init,

  4499.     NULL,

  4500.     vc1_decode_end,

  4501.     vc1_decode_frame,

  4502.     CODEC_CAP_DELAY,

  4503.     NULL

  4504. };

  4505. 

  4506. AVCodec wmv3_decoder = {

  4507.     "wmv3",

  4508.     CODEC_TYPE_VIDEO,

  4509.     CODEC_ID_WMV3,

  4510.     sizeof(VC1Context),

  4511.     vc1_decode_init,

  4512.     NULL,

  4513.     vc1_decode_end,

  4514.     vc1_decode_frame,

  4515.     CODEC_CAP_DELAY,

  4516.     NULL

  4517. };

  4518. 

  4519. #ifdef CONFIG_VC1_PARSER

  4520. /**

  4521.  * finds the end of the current frame in the bitstream.

  4522.  * @return the position of the first byte of the next frame, or -1

  4523.  */

  4524. static int vc1_find_frame_end(ParseContext *pc, const uint8_t *buf,

  4525.                                int buf_size) {

  4526.     int pic_found, i;

  4527.     uint32_t state;

  4528. 

  4529.     pic_found= pc->frame_start_found;

  4530.     state= pc->state;

  4531. 

  4532.     i=0;

  4533.     if(!pic_found){

  4534.         for(i=0; i<buf_size; i++){

  4535.             state= (state<<8) | buf[i];

  4536.             if(state == VC1_CODE_FRAME || state == VC1_CODE_FIELD){

  4537.                 i++;

  4538.                 pic_found=1;

  4539.                 break;

  4540.             }

  4541.         }

  4542.     }

  4543. 

  4544.     if(pic_found){

  4545.         /* EOF considered as end of frame */

  4546.         if (buf_size == 0)

  4547.             return 0;

  4548.         for(; i<buf_size; i++){

  4549.             state= (state<<8) | buf[i];

  4550.             if(IS_MARKER(state) && state != VC1_CODE_FIELD && state != VC1_CODE_SLICE){

  4551.                 pc->frame_start_found=0;

  4552.                 pc->state=-1;

  4553.                 return i-3;

  4554.             }

  4555.         }

  4556.     }

  4557.     pc->frame_start_found= pic_found;

  4558.     pc->state= state;

  4559.     return END_NOT_FOUND;

  4560. }

  4561. 

  4562. static int vc1_parse(AVCodecParserContext *s,

  4563.                            AVCodecContext *avctx,

  4564.                            uint8_t **poutbuf, int *poutbuf_size,

  4565.                            const uint8_t *buf, int buf_size)

  4566. {

  4567.     ParseContext *pc = s->priv_data;

  4568.     int next;

  4569. 

  4570.     if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){

  4571.         next= buf_size;

  4572.     }else{

  4573.         next= vc1_find_frame_end(pc, buf, buf_size);

  4574. 

  4575.         if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {

  4576.             *poutbuf = NULL;

  4577.             *poutbuf_size = 0;

  4578.             return buf_size;

  4579.         }

  4580.     }

  4581.     *poutbuf = (uint8_t *)buf;

  4582.     *poutbuf_size = buf_size;

  4583.     return next;

  4584. }

  4585. 

  4586. int vc1_split(AVCodecContext *avctx,

  4587.                            const uint8_t *buf, int buf_size)

  4588. {

  4589.     int i;

  4590.     uint32_t state= -1;

  4591. 

  4592.     for(i=0; i<buf_size; i++){

  4593.         state= (state<<8) | buf[i];

  4594.         if(IS_MARKER(state) && state != VC1_CODE_SEQHDR && state != VC1_CODE_ENTRYPOINT)

  4595.             return i-3;

  4596.     }

  4597.     return 0;

  4598. }

  4599. 

  4600. AVCodecParser vc1_parser = {

  4601.     { CODEC_ID_VC1 },

  4602.     sizeof(ParseContext1),

  4603.     NULL,

  4604.     vc1_parse,

  4605.     ff_parse1_close,

  4606.     vc1_split,

  4607. };

  4608. #endif /* CONFIG_VC1_PARSER */