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FFmpeg/libavcodec/svq3.c

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  1. /*

  2.  * Copyright (c) 2003 The FFmpeg Project

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

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

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

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

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

  10.  *

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

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

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

  14.  * Lesser General Public License for more details.

  15.  *

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

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

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

  19.  */

  20. 

  21. /*

  22.  * How to use this decoder:

  23.  * SVQ3 data is transported within Apple Quicktime files. Quicktime files

  24.  * have stsd atoms to describe media trak properties. A stsd atom for a

  25.  * video trak contains 1 or more ImageDescription atoms. These atoms begin

  26.  * with the 4-byte length of the atom followed by the codec fourcc. Some

  27.  * decoders need information in this atom to operate correctly. Such

  28.  * is the case with SVQ3. In order to get the best use out of this decoder,

  29.  * the calling app must make the SVQ3 ImageDescription atom available

  30.  * via the AVCodecContext's extradata[_size] field:

  31.  *

  32.  * AVCodecContext.extradata = pointer to ImageDescription, first characters

  33.  * are expected to be 'S', 'V', 'Q', and '3', NOT the 4-byte atom length

  34.  * AVCodecContext.extradata_size = size of ImageDescription atom memory

  35.  * buffer (which will be the same as the ImageDescription atom size field

  36.  * from the QT file, minus 4 bytes since the length is missing)

  37.  *

  38.  * You will know you have these parameters passed correctly when the decoder

  39.  * correctly decodes this file:

  40.  *  http://samples.mplayerhq.hu/V-codecs/SVQ3/Vertical400kbit.sorenson3.mov

  41.  */

  42. 

  43. #include <inttypes.h>

  44. 

  45. #include "libavutil/attributes.h"

  46. #include "libavutil/crc.h"

  47. 

  48. #include "internal.h"

  49. #include "avcodec.h"

  50. #include "mpegutils.h"

  51. #include "h264dec.h"

  52. #include "h264data.h"

  53. #include "golomb.h"

  54. #include "hpeldsp.h"

  55. #include "mathops.h"

  56. #include "rectangle.h"

  57. #include "tpeldsp.h"

  58. 

  59. #if CONFIG_ZLIB

  60. #include <zlib.h>

  61. #endif

  62. 

  63. #include "svq1.h"

  64. 

  65. /**

  66.  * @file

  67.  * svq3 decoder.

  68.  */

  69. 

  70. typedef struct SVQ3Frame {

  71.     AVFrame *f;

  72. 

  73.     int16_t (*motion_val_buf[2])[2];

  74.     int16_t (*motion_val[2])[2];

  75. 

  76.     uint32_t *mb_type_buf, *mb_type;

  77. } SVQ3Frame;

  78. 

  79. typedef struct SVQ3Context {

  80.     AVCodecContext *avctx;

  81. 

  82.     H264DSPContext  h264dsp;

  83.     H264PredContext hpc;

  84.     HpelDSPContext hdsp;

  85.     TpelDSPContext tdsp;

  86.     VideoDSPContext vdsp;

  87. 

  88.     SVQ3Frame *cur_pic;

  89.     SVQ3Frame *next_pic;

  90.     SVQ3Frame *last_pic;

  91.     GetBitContext gb;

  92.     GetBitContext gb_slice;

  93.     uint8_t *slice_buf;

  94.     int slice_size;

  95.     int halfpel_flag;

  96.     int thirdpel_flag;

  97.     int has_watermark;

  98.     uint32_t watermark_key;

  99.     uint8_t *buf;

  100.     int buf_size;

  101.     int adaptive_quant;

  102.     int next_p_frame_damaged;

  103.     int h_edge_pos;

  104.     int v_edge_pos;

  105.     int last_frame_output;

  106.     int slice_num;

  107.     int qscale;

  108.     int cbp;

  109.     int frame_num;

  110.     int frame_num_offset;

  111.     int prev_frame_num_offset;

  112.     int prev_frame_num;

  113. 

  114.     enum AVPictureType pict_type;

  115.     enum AVPictureType slice_type;

  116.     int low_delay;

  117. 

  118.     int mb_x, mb_y;

  119.     int mb_xy;

  120.     int mb_width, mb_height;

  121.     int mb_stride, mb_num;

  122.     int b_stride;

  123. 

  124.     uint32_t *mb2br_xy;

  125. 

  126.     int chroma_pred_mode;

  127.     int intra16x16_pred_mode;

  128. 

  129.     int8_t   intra4x4_pred_mode_cache[5 * 8];

  130.     int8_t (*intra4x4_pred_mode);

  131. 

  132.     unsigned int top_samples_available;

  133.     unsigned int topright_samples_available;

  134.     unsigned int left_samples_available;

  135. 

  136.     uint8_t *edge_emu_buffer;

  137. 

  138.     DECLARE_ALIGNED(16, int16_t, mv_cache)[2][5 * 8][2];

  139.     DECLARE_ALIGNED(8,  int8_t, ref_cache)[2][5 * 8];

  140.     DECLARE_ALIGNED(16, int16_t, mb)[16 * 48 * 2];

  141.     DECLARE_ALIGNED(16, int16_t, mb_luma_dc)[3][16 * 2];

  142.     DECLARE_ALIGNED(8, uint8_t, non_zero_count_cache)[15 * 8];

  143.     uint32_t dequant4_coeff[QP_MAX_NUM + 1][16];

  144.     int block_offset[2 * (16 * 3)];

  145.     SVQ3Frame frames[3];

  146. } SVQ3Context;

  147. 

  148. #define FULLPEL_MODE  1

  149. #define HALFPEL_MODE  2

  150. #define THIRDPEL_MODE 3

  151. #define PREDICT_MODE  4

  152. 

  153. /* dual scan (from some older H.264 draft)

  154.  * o-->o-->o   o

  155.  *         |  /|

  156.  * o   o   o / o

  157.  * | / |   |/  |

  158.  * o   o   o   o

  159.  *   /

  160.  * o-->o-->o-->o

  161.  */

  162. static const uint8_t svq3_scan[16] = {

  163.     0 + 0 * 4, 1 + 0 * 4, 2 + 0 * 4, 2 + 1 * 4,

  164.     2 + 2 * 4, 3 + 0 * 4, 3 + 1 * 4, 3 + 2 * 4,

  165.     0 + 1 * 4, 0 + 2 * 4, 1 + 1 * 4, 1 + 2 * 4,

  166.     0 + 3 * 4, 1 + 3 * 4, 2 + 3 * 4, 3 + 3 * 4,

  167. };

  168. 

  169. static const uint8_t luma_dc_zigzag_scan[16] = {

  170.     0 * 16 + 0 * 64, 1 * 16 + 0 * 64, 2 * 16 + 0 * 64, 0 * 16 + 2 * 64,

  171.     3 * 16 + 0 * 64, 0 * 16 + 1 * 64, 1 * 16 + 1 * 64, 2 * 16 + 1 * 64,

  172.     1 * 16 + 2 * 64, 2 * 16 + 2 * 64, 3 * 16 + 2 * 64, 0 * 16 + 3 * 64,

  173.     3 * 16 + 1 * 64, 1 * 16 + 3 * 64, 2 * 16 + 3 * 64, 3 * 16 + 3 * 64,

  174. };

  175. 

  176. static const uint8_t svq3_pred_0[25][2] = {

  177.     { 0, 0 },

  178.     { 1, 0 }, { 0, 1 },

  179.     { 0, 2 }, { 1, 1 }, { 2, 0 },

  180.     { 3, 0 }, { 2, 1 }, { 1, 2 }, { 0, 3 },

  181.     { 0, 4 }, { 1, 3 }, { 2, 2 }, { 3, 1 }, { 4, 0 },

  182.     { 4, 1 }, { 3, 2 }, { 2, 3 }, { 1, 4 },

  183.     { 2, 4 }, { 3, 3 }, { 4, 2 },

  184.     { 4, 3 }, { 3, 4 },

  185.     { 4, 4 }

  186. };

  187. 

  188. static const int8_t svq3_pred_1[6][6][5] = {

  189.     { { 2, -1, -1, -1, -1 }, { 2, 1, -1, -1, -1 }, { 1, 2, -1, -1, -1 },

  190.       { 2,  1, -1, -1, -1 }, { 1, 2, -1, -1, -1 }, { 1, 2, -1, -1, -1 } },

  191.     { { 0,  2, -1, -1, -1 }, { 0, 2,  1,  4,  3 }, { 0, 1,  2,  4,  3 },

  192.       { 0,  2,  1,  4,  3 }, { 2, 0,  1,  3,  4 }, { 0, 4,  2,  1,  3 } },

  193.     { { 2,  0, -1, -1, -1 }, { 2, 1,  0,  4,  3 }, { 1, 2,  4,  0,  3 },

  194.       { 2,  1,  0,  4,  3 }, { 2, 1,  4,  3,  0 }, { 1, 2,  4,  0,  3 } },

  195.     { { 2,  0, -1, -1, -1 }, { 2, 0,  1,  4,  3 }, { 1, 2,  0,  4,  3 },

  196.       { 2,  1,  0,  4,  3 }, { 2, 1,  3,  4,  0 }, { 2, 4,  1,  0,  3 } },

  197.     { { 0,  2, -1, -1, -1 }, { 0, 2,  1,  3,  4 }, { 1, 2,  3,  0,  4 },

  198.       { 2,  0,  1,  3,  4 }, { 2, 1,  3,  0,  4 }, { 2, 0,  4,  3,  1 } },

  199.     { { 0,  2, -1, -1, -1 }, { 0, 2,  4,  1,  3 }, { 1, 4,  2,  0,  3 },

  200.       { 4,  2,  0,  1,  3 }, { 2, 0,  1,  4,  3 }, { 4, 2,  1,  0,  3 } },

  201. };

  202. 

  203. static const struct {

  204.     uint8_t run;

  205.     uint8_t level;

  206. } svq3_dct_tables[2][16] = {

  207.     { { 0, 0 }, { 0, 1 }, { 1, 1 }, { 2, 1 }, { 0, 2 }, { 3, 1 }, { 4, 1 }, { 5, 1 },

  208.       { 0, 3 }, { 1, 2 }, { 2, 2 }, { 6, 1 }, { 7, 1 }, { 8, 1 }, { 9, 1 }, { 0, 4 } },

  209.     { { 0, 0 }, { 0, 1 }, { 1, 1 }, { 0, 2 }, { 2, 1 }, { 0, 3 }, { 0, 4 }, { 0, 5 },

  210.       { 3, 1 }, { 4, 1 }, { 1, 2 }, { 1, 3 }, { 0, 6 }, { 0, 7 }, { 0, 8 }, { 0, 9 } }

  211. };

  212. 

  213. static const uint32_t svq3_dequant_coeff[32] = {

  214.      3881,  4351,  4890,  5481,   6154,   6914,   7761,   8718,

  215.      9781, 10987, 12339, 13828,  15523,  17435,  19561,  21873,

  216.     24552, 27656, 30847, 34870,  38807,  43747,  49103,  54683,

  217.     61694, 68745, 77615, 89113, 100253, 109366, 126635, 141533

  218. };

  219. 

  220. static void svq3_luma_dc_dequant_idct_c(int16_t *output, int16_t *input, int qp)

  221. {

  222.     const unsigned qmul = svq3_dequant_coeff[qp];

  223. #define stride 16

  224.     int i;

  225.     int temp[16];

  226.     static const uint8_t x_offset[4] = { 0, 1 * stride, 4 * stride, 5 * stride };

  227. 

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

  229.         const int z0 = 13 * (input[4 * i + 0] +      input[4 * i + 2]);

  230.         const int z1 = 13 * (input[4 * i + 0] -      input[4 * i + 2]);

  231.         const int z2 =  7 *  input[4 * i + 1] - 17 * input[4 * i + 3];

  232.         const int z3 = 17 *  input[4 * i + 1] +  7 * input[4 * i + 3];

  233. 

  234.         temp[4 * i + 0] = z0 + z3;

  235.         temp[4 * i + 1] = z1 + z2;

  236.         temp[4 * i + 2] = z1 - z2;

  237.         temp[4 * i + 3] = z0 - z3;

  238.     }

  239. 

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

  241.         const int offset = x_offset[i];

  242.         const int z0     = 13 * (temp[4 * 0 + i] +      temp[4 * 2 + i]);

  243.         const int z1     = 13 * (temp[4 * 0 + i] -      temp[4 * 2 + i]);

  244.         const int z2     =  7 *  temp[4 * 1 + i] - 17 * temp[4 * 3 + i];

  245.         const int z3     = 17 *  temp[4 * 1 + i] +  7 * temp[4 * 3 + i];

  246. 

  247.         output[stride *  0 + offset] = (int)((z0 + z3) * qmul + 0x80000) >> 20;

  248.         output[stride *  2 + offset] = (int)((z1 + z2) * qmul + 0x80000) >> 20;

  249.         output[stride *  8 + offset] = (int)((z1 - z2) * qmul + 0x80000) >> 20;

  250.         output[stride * 10 + offset] = (int)((z0 - z3) * qmul + 0x80000) >> 20;

  251.     }

  252. }

  253. #undef stride

  254. 

  255. static void svq3_add_idct_c(uint8_t *dst, int16_t *block,

  256.                             int stride, int qp, int dc)

  257. {

  258.     const int qmul = svq3_dequant_coeff[qp];

  259.     int i;

  260. 

  261.     if (dc) {

  262.         dc       = 13 * 13 * (dc == 1 ? 1538U* block[0]

  263.                                       : qmul * (block[0] >> 3) / 2);

  264.         block[0] = 0;

  265.     }

  266. 

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

  268.         const int z0 = 13 * (block[0 + 4 * i] +      block[2 + 4 * i]);

  269.         const int z1 = 13 * (block[0 + 4 * i] -      block[2 + 4 * i]);

  270.         const int z2 =  7 *  block[1 + 4 * i] - 17 * block[3 + 4 * i];

  271.         const int z3 = 17 *  block[1 + 4 * i] +  7 * block[3 + 4 * i];

  272. 

  273.         block[0 + 4 * i] = z0 + z3;

  274.         block[1 + 4 * i] = z1 + z2;

  275.         block[2 + 4 * i] = z1 - z2;

  276.         block[3 + 4 * i] = z0 - z3;

  277.     }

  278. 

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

  280.         const unsigned z0 = 13 * (block[i + 4 * 0] +      block[i + 4 * 2]);

  281.         const unsigned z1 = 13 * (block[i + 4 * 0] -      block[i + 4 * 2]);

  282.         const unsigned z2 =  7 *  block[i + 4 * 1] - 17 * block[i + 4 * 3];

  283.         const unsigned z3 = 17 *  block[i + 4 * 1] +  7 * block[i + 4 * 3];

  284.         const int rr = (dc + 0x80000u);

  285. 

  286.         dst[i + stride * 0] = av_clip_uint8(dst[i + stride * 0] + ((int)((z0 + z3) * qmul + rr) >> 20));

  287.         dst[i + stride * 1] = av_clip_uint8(dst[i + stride * 1] + ((int)((z1 + z2) * qmul + rr) >> 20));

  288.         dst[i + stride * 2] = av_clip_uint8(dst[i + stride * 2] + ((int)((z1 - z2) * qmul + rr) >> 20));

  289.         dst[i + stride * 3] = av_clip_uint8(dst[i + stride * 3] + ((int)((z0 - z3) * qmul + rr) >> 20));

  290.     }

  291. 

  292.     memset(block, 0, 16 * sizeof(int16_t));

  293. }

  294. 

  295. static inline int svq3_decode_block(GetBitContext *gb, int16_t *block,

  296.                                     int index, const int type)

  297. {

  298.     static const uint8_t *const scan_patterns[4] = {

  299.         luma_dc_zigzag_scan, ff_zigzag_scan, svq3_scan, ff_h264_chroma_dc_scan

  300.     };

  301. 

  302.     int run, level, sign, limit;

  303.     unsigned vlc;

  304.     const int intra           = 3 * type >> 2;

  305.     const uint8_t *const scan = scan_patterns[type];

  306. 

  307.     for (limit = (16 >> intra); index < 16; index = limit, limit += 8) {

  308.         for (; (vlc = get_interleaved_ue_golomb(gb)) != 0; index++) {

  309.             if ((int32_t)vlc < 0)

  310.                 return -1;

  311. 

  312.             sign     = (vlc & 1) ? 0 : -1;

  313.             vlc      = vlc + 1 >> 1;

  314. 

  315.             if (type == 3) {

  316.                 if (vlc < 3) {

  317.                     run   = 0;

  318.                     level = vlc;

  319.                 } else if (vlc < 4) {

  320.                     run   = 1;

  321.                     level = 1;

  322.                 } else {

  323.                     run   = vlc & 0x3;

  324.                     level = (vlc + 9 >> 2) - run;

  325.                 }

  326.             } else {

  327.                 if (vlc < 16U) {

  328.                     run   = svq3_dct_tables[intra][vlc].run;

  329.                     level = svq3_dct_tables[intra][vlc].level;

  330.                 } else if (intra) {

  331.                     run   = vlc & 0x7;

  332.                     level = (vlc >> 3) + ((run == 0) ? 8 : ((run < 2) ? 2 : ((run < 5) ? 0 : -1)));

  333.                 } else {

  334.                     run   = vlc & 0xF;

  335.                     level = (vlc >> 4) + ((run == 0) ? 4 : ((run < 3) ? 2 : ((run < 10) ? 1 : 0)));

  336.                 }

  337.             }

  338. 

  339. 

  340.             if ((index += run) >= limit)

  341.                 return -1;

  342. 

  343.             block[scan[index]] = (level ^ sign) - sign;

  344.         }

  345. 

  346.         if (type != 2) {

  347.             break;

  348.         }

  349.     }

  350. 

  351.     return 0;

  352. }

  353. 

  354. static av_always_inline int

  355. svq3_fetch_diagonal_mv(const SVQ3Context *s, const int16_t **C,

  356.                        int i, int list, int part_width)

  357. {

  358.     const int topright_ref = s->ref_cache[list][i - 8 + part_width];

  359. 

  360.     if (topright_ref != PART_NOT_AVAILABLE) {

  361.         *C = s->mv_cache[list][i - 8 + part_width];

  362.         return topright_ref;

  363.     } else {

  364.         *C = s->mv_cache[list][i - 8 - 1];

  365.         return s->ref_cache[list][i - 8 - 1];

  366.     }

  367. }

  368. 

  369. /**

  370.  * Get the predicted MV.

  371.  * @param n the block index

  372.  * @param part_width the width of the partition (4, 8,16) -> (1, 2, 4)

  373.  * @param mx the x component of the predicted motion vector

  374.  * @param my the y component of the predicted motion vector

  375.  */

  376. static av_always_inline void svq3_pred_motion(const SVQ3Context *s, int n,

  377.                                               int part_width, int list,

  378.                                               int ref, int *const mx, int *const my)

  379. {

  380.     const int index8       = scan8[n];

  381.     const int top_ref      = s->ref_cache[list][index8 - 8];

  382.     const int left_ref     = s->ref_cache[list][index8 - 1];

  383.     const int16_t *const A = s->mv_cache[list][index8 - 1];

  384.     const int16_t *const B = s->mv_cache[list][index8 - 8];

  385.     const int16_t *C;

  386.     int diagonal_ref, match_count;

  387. 

  388. /* mv_cache

  389.  * B . . A T T T T

  390.  * U . . L . . , .

  391.  * U . . L . . . .

  392.  * U . . L . . , .

  393.  * . . . L . . . .

  394.  */

  395. 

  396.     diagonal_ref = svq3_fetch_diagonal_mv(s, &C, index8, list, part_width);

  397.     match_count  = (diagonal_ref == ref) + (top_ref == ref) + (left_ref == ref);

  398.     if (match_count > 1) { //most common

  399.         *mx = mid_pred(A[0], B[0], C[0]);

  400.         *my = mid_pred(A[1], B[1], C[1]);

  401.     } else if (match_count == 1) {

  402.         if (left_ref == ref) {

  403.             *mx = A[0];

  404.             *my = A[1];

  405.         } else if (top_ref == ref) {

  406.             *mx = B[0];

  407.             *my = B[1];

  408.         } else {

  409.             *mx = C[0];

  410.             *my = C[1];

  411.         }

  412.     } else {

  413.         if (top_ref      == PART_NOT_AVAILABLE &&

  414.             diagonal_ref == PART_NOT_AVAILABLE &&

  415.             left_ref     != PART_NOT_AVAILABLE) {

  416.             *mx = A[0];

  417.             *my = A[1];

  418.         } else {

  419.             *mx = mid_pred(A[0], B[0], C[0]);

  420.             *my = mid_pred(A[1], B[1], C[1]);

  421.         }

  422.     }

  423. }

  424. 

  425. static inline void svq3_mc_dir_part(SVQ3Context *s,

  426.                                     int x, int y, int width, int height,

  427.                                     int mx, int my, int dxy,

  428.                                     int thirdpel, int dir, int avg)

  429. {

  430.     const SVQ3Frame *pic = (dir == 0) ? s->last_pic : s->next_pic;

  431.     uint8_t *src, *dest;

  432.     int i, emu = 0;

  433.     int blocksize = 2 - (width >> 3); // 16->0, 8->1, 4->2

  434.     int linesize   = s->cur_pic->f->linesize[0];

  435.     int uvlinesize = s->cur_pic->f->linesize[1];

  436. 

  437.     mx += x;

  438.     my += y;

  439. 

  440.     if (mx < 0 || mx >= s->h_edge_pos - width  - 1 ||

  441.         my < 0 || my >= s->v_edge_pos - height - 1) {

  442.         emu = 1;

  443.         mx = av_clip(mx, -16, s->h_edge_pos - width  + 15);

  444.         my = av_clip(my, -16, s->v_edge_pos - height + 15);

  445.     }

  446. 

  447.     /* form component predictions */

  448.     dest = s->cur_pic->f->data[0] + x + y * linesize;

  449.     src  = pic->f->data[0] + mx + my * linesize;

  450. 

  451.     if (emu) {

  452.         s->vdsp.emulated_edge_mc(s->edge_emu_buffer, src,

  453.                                  linesize, linesize,

  454.                                  width + 1, height + 1,

  455.                                  mx, my, s->h_edge_pos, s->v_edge_pos);

  456.         src = s->edge_emu_buffer;

  457.     }

  458.     if (thirdpel)

  459.         (avg ? s->tdsp.avg_tpel_pixels_tab

  460.              : s->tdsp.put_tpel_pixels_tab)[dxy](dest, src, linesize,

  461.                                                  width, height);

  462.     else

  463.         (avg ? s->hdsp.avg_pixels_tab

  464.              : s->hdsp.put_pixels_tab)[blocksize][dxy](dest, src, linesize,

  465.                                                        height);

  466. 

  467.     if (!(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {

  468.         mx     = mx + (mx < (int) x) >> 1;

  469.         my     = my + (my < (int) y) >> 1;

  470.         width  = width  >> 1;

  471.         height = height >> 1;

  472.         blocksize++;

  473. 

  474.         for (i = 1; i < 3; i++) {

  475.             dest = s->cur_pic->f->data[i] + (x >> 1) + (y >> 1) * uvlinesize;

  476.             src  = pic->f->data[i] + mx + my * uvlinesize;

  477. 

  478.             if (emu) {

  479.                 s->vdsp.emulated_edge_mc(s->edge_emu_buffer, src,

  480.                                          uvlinesize, uvlinesize,

  481.                                          width + 1, height + 1,

  482.                                          mx, my, (s->h_edge_pos >> 1),

  483.                                          s->v_edge_pos >> 1);

  484.                 src = s->edge_emu_buffer;

  485.             }

  486.             if (thirdpel)

  487.                 (avg ? s->tdsp.avg_tpel_pixels_tab

  488.                      : s->tdsp.put_tpel_pixels_tab)[dxy](dest, src,

  489.                                                          uvlinesize,

  490.                                                          width, height);

  491.             else

  492.                 (avg ? s->hdsp.avg_pixels_tab

  493.                      : s->hdsp.put_pixels_tab)[blocksize][dxy](dest, src,

  494.                                                                uvlinesize,

  495.                                                                height);

  496.         }

  497.     }

  498. }

  499. 

  500. static inline int svq3_mc_dir(SVQ3Context *s, int size, int mode,

  501.                               int dir, int avg)

  502. {

  503.     int i, j, k, mx, my, dx, dy, x, y;

  504.     const int part_width    = ((size & 5) == 4) ? 4 : 16 >> (size & 1);

  505.     const int part_height   = 16 >> ((unsigned)(size + 1) / 3);

  506.     const int extra_width   = (mode == PREDICT_MODE) ? -16 * 6 : 0;

  507.     const int h_edge_pos    = 6 * (s->h_edge_pos - part_width)  - extra_width;

  508.     const int v_edge_pos    = 6 * (s->v_edge_pos - part_height) - extra_width;

  509. 

  510.     for (i = 0; i < 16; i += part_height)

  511.         for (j = 0; j < 16; j += part_width) {

  512.             const int b_xy = (4 * s->mb_x + (j >> 2)) +

  513.                              (4 * s->mb_y + (i >> 2)) * s->b_stride;

  514.             int dxy;

  515.             x = 16 * s->mb_x + j;

  516.             y = 16 * s->mb_y + i;

  517.             k = (j >> 2 & 1) + (i >> 1 & 2) +

  518.                 (j >> 1 & 4) + (i      & 8);

  519. 

  520.             if (mode != PREDICT_MODE) {

  521.                 svq3_pred_motion(s, k, part_width >> 2, dir, 1, &mx, &my);

  522.             } else {

  523.                 mx = s->next_pic->motion_val[0][b_xy][0] * 2;

  524.                 my = s->next_pic->motion_val[0][b_xy][1] * 2;

  525. 

  526.                 if (dir == 0) {

  527.                     mx = mx * s->frame_num_offset /

  528.                          s->prev_frame_num_offset + 1 >> 1;

  529.                     my = my * s->frame_num_offset /

  530.                          s->prev_frame_num_offset + 1 >> 1;

  531.                 } else {

  532.                     mx = mx * (s->frame_num_offset - s->prev_frame_num_offset) /

  533.                          s->prev_frame_num_offset + 1 >> 1;

  534.                     my = my * (s->frame_num_offset - s->prev_frame_num_offset) /

  535.                          s->prev_frame_num_offset + 1 >> 1;

  536.                 }

  537.             }

  538. 

  539.             /* clip motion vector prediction to frame border */

  540.             mx = av_clip(mx, extra_width - 6 * x, h_edge_pos - 6 * x);

  541.             my = av_clip(my, extra_width - 6 * y, v_edge_pos - 6 * y);

  542. 

  543.             /* get (optional) motion vector differential */

  544.             if (mode == PREDICT_MODE) {

  545.                 dx = dy = 0;

  546.             } else {

  547.                 dy = get_interleaved_se_golomb(&s->gb_slice);

  548.                 dx = get_interleaved_se_golomb(&s->gb_slice);

  549. 

  550.                 if (dx != (int16_t)dx || dy != (int16_t)dy) {

  551.                     av_log(s->avctx, AV_LOG_ERROR, "invalid MV vlc\n");

  552.                     return -1;

  553.                 }

  554.             }

  555. 

  556.             /* compute motion vector */

  557.             if (mode == THIRDPEL_MODE) {

  558.                 int fx, fy;

  559.                 mx  = (mx + 1 >> 1) + dx;

  560.                 my  = (my + 1 >> 1) + dy;

  561.                 fx  = (unsigned)(mx + 0x30000) / 3 - 0x10000;

  562.                 fy  = (unsigned)(my + 0x30000) / 3 - 0x10000;

  563.                 dxy = (mx - 3 * fx) + 4 * (my - 3 * fy);

  564. 

  565.                 svq3_mc_dir_part(s, x, y, part_width, part_height,

  566.                                  fx, fy, dxy, 1, dir, avg);

  567.                 mx += mx;

  568.                 my += my;

  569.             } else if (mode == HALFPEL_MODE || mode == PREDICT_MODE) {

  570.                 mx  = (unsigned)(mx + 1 + 0x30000) / 3 + dx - 0x10000;

  571.                 my  = (unsigned)(my + 1 + 0x30000) / 3 + dy - 0x10000;

  572.                 dxy = (mx & 1) + 2 * (my & 1);

  573. 

  574.                 svq3_mc_dir_part(s, x, y, part_width, part_height,

  575.                                  mx >> 1, my >> 1, dxy, 0, dir, avg);

  576.                 mx *= 3;

  577.                 my *= 3;

  578.             } else {

  579.                 mx = (unsigned)(mx + 3 + 0x60000) / 6 + dx - 0x10000;

  580.                 my = (unsigned)(my + 3 + 0x60000) / 6 + dy - 0x10000;

  581. 

  582.                 svq3_mc_dir_part(s, x, y, part_width, part_height,

  583.                                  mx, my, 0, 0, dir, avg);

  584.                 mx *= 6;

  585.                 my *= 6;

  586.             }

  587. 

  588.             /* update mv_cache */

  589.             if (mode != PREDICT_MODE) {

  590.                 int32_t mv = pack16to32(mx, my);

  591. 

  592.                 if (part_height == 8 && i < 8) {

  593.                     AV_WN32A(s->mv_cache[dir][scan8[k] + 1 * 8], mv);

  594. 

  595.                     if (part_width == 8 && j < 8)

  596.                         AV_WN32A(s->mv_cache[dir][scan8[k] + 1 + 1 * 8], mv);

  597.                 }

  598.                 if (part_width == 8 && j < 8)

  599.                     AV_WN32A(s->mv_cache[dir][scan8[k] + 1], mv);

  600.                 if (part_width == 4 || part_height == 4)

  601.                     AV_WN32A(s->mv_cache[dir][scan8[k]], mv);

  602.             }

  603. 

  604.             /* write back motion vectors */

  605.             fill_rectangle(s->cur_pic->motion_val[dir][b_xy],

  606.                            part_width >> 2, part_height >> 2, s->b_stride,

  607.                            pack16to32(mx, my), 4);

  608.         }

  609. 

  610.     return 0;

  611. }

  612. 

  613. static av_always_inline void hl_decode_mb_idct_luma(SVQ3Context *s,

  614.                                                     int mb_type, const int *block_offset,

  615.                                                     int linesize, uint8_t *dest_y)

  616. {

  617.     int i;

  618.     if (!IS_INTRA4x4(mb_type)) {

  619.         for (i = 0; i < 16; i++)

  620.             if (s->non_zero_count_cache[scan8[i]] || s->mb[i * 16]) {

  621.                 uint8_t *const ptr = dest_y + block_offset[i];

  622.                 svq3_add_idct_c(ptr, s->mb + i * 16, linesize,

  623.                                 s->qscale, IS_INTRA(mb_type) ? 1 : 0);

  624.             }

  625.     }

  626. }

  627. 

  628. static av_always_inline void hl_decode_mb_predict_luma(SVQ3Context *s,

  629.                                                        int mb_type,

  630.                                                        const int *block_offset,

  631.                                                        int linesize,

  632.                                                        uint8_t *dest_y)

  633. {

  634.     int i;

  635.     int qscale = s->qscale;

  636. 

  637.     if (IS_INTRA4x4(mb_type)) {

  638.         for (i = 0; i < 16; i++) {

  639.             uint8_t *const ptr = dest_y + block_offset[i];

  640.             const int dir      = s->intra4x4_pred_mode_cache[scan8[i]];

  641. 

  642.             uint8_t *topright;

  643.             int nnz, tr;

  644.             if (dir == DIAG_DOWN_LEFT_PRED || dir == VERT_LEFT_PRED) {

  645.                 const int topright_avail = (s->topright_samples_available << i) & 0x8000;

  646.                 av_assert2(s->mb_y || linesize <= block_offset[i]);

  647.                 if (!topright_avail) {

  648.                     tr       = ptr[3 - linesize] * 0x01010101u;

  649.                     topright = (uint8_t *)&tr;

  650.                 } else

  651.                     topright = ptr + 4 - linesize;

  652.             } else

  653.                 topright = NULL;

  654. 

  655.             s->hpc.pred4x4[dir](ptr, topright, linesize);

  656.             nnz = s->non_zero_count_cache[scan8[i]];

  657.             if (nnz) {

  658.                 svq3_add_idct_c(ptr, s->mb + i * 16, linesize, qscale, 0);

  659.             }

  660.         }

  661.     } else {

  662.         s->hpc.pred16x16[s->intra16x16_pred_mode](dest_y, linesize);

  663.         svq3_luma_dc_dequant_idct_c(s->mb, s->mb_luma_dc[0], qscale);

  664.     }

  665. }

  666. 

  667. static void hl_decode_mb(SVQ3Context *s)

  668. {

  669.     const int mb_x    = s->mb_x;

  670.     const int mb_y    = s->mb_y;

  671.     const int mb_xy   = s->mb_xy;

  672.     const int mb_type = s->cur_pic->mb_type[mb_xy];

  673.     uint8_t *dest_y, *dest_cb, *dest_cr;

  674.     int linesize, uvlinesize;

  675.     int i, j;

  676.     const int *block_offset = &s->block_offset[0];

  677.     const int block_h   = 16 >> 1;

  678. 

  679.     linesize   = s->cur_pic->f->linesize[0];

  680.     uvlinesize = s->cur_pic->f->linesize[1];

  681. 

  682.     dest_y  = s->cur_pic->f->data[0] + (mb_x     + mb_y * linesize)  * 16;

  683.     dest_cb = s->cur_pic->f->data[1] +  mb_x * 8 + mb_y * uvlinesize * block_h;

  684.     dest_cr = s->cur_pic->f->data[2] +  mb_x * 8 + mb_y * uvlinesize * block_h;

  685. 

  686.     s->vdsp.prefetch(dest_y  + (s->mb_x & 3) * 4 * linesize   + 64, linesize,      4);

  687.     s->vdsp.prefetch(dest_cb + (s->mb_x & 7)     * uvlinesize + 64, dest_cr - dest_cb, 2);

  688. 

  689.     if (IS_INTRA(mb_type)) {

  690.         s->hpc.pred8x8[s->chroma_pred_mode](dest_cb, uvlinesize);

  691.         s->hpc.pred8x8[s->chroma_pred_mode](dest_cr, uvlinesize);

  692. 

  693.         hl_decode_mb_predict_luma(s, mb_type, block_offset, linesize, dest_y);

  694.     }

  695. 

  696.     hl_decode_mb_idct_luma(s, mb_type, block_offset, linesize, dest_y);

  697. 

  698.     if (s->cbp & 0x30) {

  699.         uint8_t *dest[2] = { dest_cb, dest_cr };

  700.         s->h264dsp.h264_chroma_dc_dequant_idct(s->mb + 16 * 16 * 1,

  701.                                                s->dequant4_coeff[4][0]);

  702.         s->h264dsp.h264_chroma_dc_dequant_idct(s->mb + 16 * 16 * 2,

  703.                                                s->dequant4_coeff[4][0]);

  704.         for (j = 1; j < 3; j++) {

  705.             for (i = j * 16; i < j * 16 + 4; i++)

  706.                 if (s->non_zero_count_cache[scan8[i]] || s->mb[i * 16]) {

  707.                     uint8_t *const ptr = dest[j - 1] + block_offset[i];

  708.                     svq3_add_idct_c(ptr, s->mb + i * 16,

  709.                                     uvlinesize, ff_h264_chroma_qp[0][s->qscale + 12] - 12, 2);

  710.                 }

  711.         }

  712.     }

  713. }

  714. 

  715. static int svq3_decode_mb(SVQ3Context *s, unsigned int mb_type)

  716. {

  717.     int i, j, k, m, dir, mode;

  718.     int cbp = 0;

  719.     uint32_t vlc;

  720.     int8_t *top, *left;

  721.     const int mb_xy = s->mb_xy;

  722.     const int b_xy  = 4 * s->mb_x + 4 * s->mb_y * s->b_stride;

  723. 

  724.     s->top_samples_available      = (s->mb_y == 0) ? 0x33FF : 0xFFFF;

  725.     s->left_samples_available     = (s->mb_x == 0) ? 0x5F5F : 0xFFFF;

  726.     s->topright_samples_available = 0xFFFF;

  727. 

  728.     if (mb_type == 0) {           /* SKIP */

  729.         if (s->pict_type == AV_PICTURE_TYPE_P ||

  730.             s->next_pic->mb_type[mb_xy] == -1) {

  731.             svq3_mc_dir_part(s, 16 * s->mb_x, 16 * s->mb_y, 16, 16,

  732.                              0, 0, 0, 0, 0, 0);

  733. 

  734.             if (s->pict_type == AV_PICTURE_TYPE_B)

  735.                 svq3_mc_dir_part(s, 16 * s->mb_x, 16 * s->mb_y, 16, 16,

  736.                                  0, 0, 0, 0, 1, 1);

  737. 

  738.             mb_type = MB_TYPE_SKIP;

  739.         } else {

  740.             mb_type = FFMIN(s->next_pic->mb_type[mb_xy], 6);

  741.             if (svq3_mc_dir(s, mb_type, PREDICT_MODE, 0, 0) < 0)

  742.                 return -1;

  743.             if (svq3_mc_dir(s, mb_type, PREDICT_MODE, 1, 1) < 0)

  744.                 return -1;

  745. 

  746.             mb_type = MB_TYPE_16x16;

  747.         }

  748.     } else if (mb_type < 8) {     /* INTER */

  749.         if (s->thirdpel_flag && s->halfpel_flag == !get_bits1(&s->gb_slice))

  750.             mode = THIRDPEL_MODE;

  751.         else if (s->halfpel_flag &&

  752.                  s->thirdpel_flag == !get_bits1(&s->gb_slice))

  753.             mode = HALFPEL_MODE;

  754.         else

  755.             mode = FULLPEL_MODE;

  756. 

  757.         /* fill caches */

  758.         /* note ref_cache should contain here:

  759.          *  ????????

  760.          *  ???11111

  761.          *  N??11111

  762.          *  N??11111

  763.          *  N??11111

  764.          */

  765. 

  766.         for (m = 0; m < 2; m++) {

  767.             if (s->mb_x > 0 && s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - 1] + 6] != -1) {

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

  769.                     AV_COPY32(s->mv_cache[m][scan8[0] - 1 + i * 8],

  770.                               s->cur_pic->motion_val[m][b_xy - 1 + i * s->b_stride]);

  771.             } else {

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

  773.                     AV_ZERO32(s->mv_cache[m][scan8[0] - 1 + i * 8]);

  774.             }

  775.             if (s->mb_y > 0) {

  776.                 memcpy(s->mv_cache[m][scan8[0] - 1 * 8],

  777.                        s->cur_pic->motion_val[m][b_xy - s->b_stride],

  778.                        4 * 2 * sizeof(int16_t));

  779.                 memset(&s->ref_cache[m][scan8[0] - 1 * 8],

  780.                        (s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride]] == -1) ? PART_NOT_AVAILABLE : 1, 4);

  781. 

  782.                 if (s->mb_x < s->mb_width - 1) {

  783.                     AV_COPY32(s->mv_cache[m][scan8[0] + 4 - 1 * 8],

  784.                               s->cur_pic->motion_val[m][b_xy - s->b_stride + 4]);

  785.                     s->ref_cache[m][scan8[0] + 4 - 1 * 8] =

  786.                         (s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride + 1] + 6] == -1 ||

  787.                          s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride]] == -1) ? PART_NOT_AVAILABLE : 1;

  788.                 } else

  789.                     s->ref_cache[m][scan8[0] + 4 - 1 * 8] = PART_NOT_AVAILABLE;

  790.                 if (s->mb_x > 0) {

  791.                     AV_COPY32(s->mv_cache[m][scan8[0] - 1 - 1 * 8],

  792.                               s->cur_pic->motion_val[m][b_xy - s->b_stride - 1]);

  793.                     s->ref_cache[m][scan8[0] - 1 - 1 * 8] =

  794.                         (s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride - 1] + 3] == -1) ? PART_NOT_AVAILABLE : 1;

  795.                 } else

  796.                     s->ref_cache[m][scan8[0] - 1 - 1 * 8] = PART_NOT_AVAILABLE;

  797.             } else

  798.                 memset(&s->ref_cache[m][scan8[0] - 1 * 8 - 1],

  799.                        PART_NOT_AVAILABLE, 8);

  800. 

  801.             if (s->pict_type != AV_PICTURE_TYPE_B)

  802.                 break;

  803.         }

  804. 

  805.         /* decode motion vector(s) and form prediction(s) */

  806.         if (s->pict_type == AV_PICTURE_TYPE_P) {

  807.             if (svq3_mc_dir(s, mb_type - 1, mode, 0, 0) < 0)

  808.                 return -1;

  809.         } else {        /* AV_PICTURE_TYPE_B */

  810.             if (mb_type != 2) {

  811.                 if (svq3_mc_dir(s, 0, mode, 0, 0) < 0)

  812.                     return -1;

  813.             } else {

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

  815.                     memset(s->cur_pic->motion_val[0][b_xy + i * s->b_stride],

  816.                            0, 4 * 2 * sizeof(int16_t));

  817.             }

  818.             if (mb_type != 1) {

  819.                 if (svq3_mc_dir(s, 0, mode, 1, mb_type == 3) < 0)

  820.                     return -1;

  821.             } else {

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

  823.                     memset(s->cur_pic->motion_val[1][b_xy + i * s->b_stride],

  824.                            0, 4 * 2 * sizeof(int16_t));

  825.             }

  826.         }

  827. 

  828.         mb_type = MB_TYPE_16x16;

  829.     } else if (mb_type == 8 || mb_type == 33) {   /* INTRA4x4 */

  830.         int8_t *i4x4       = s->intra4x4_pred_mode + s->mb2br_xy[s->mb_xy];

  831.         int8_t *i4x4_cache = s->intra4x4_pred_mode_cache;

  832. 

  833.         memset(s->intra4x4_pred_mode_cache, -1, 8 * 5 * sizeof(int8_t));

  834. 

  835.         if (mb_type == 8) {

  836.             if (s->mb_x > 0) {

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

  838.                     s->intra4x4_pred_mode_cache[scan8[0] - 1 + i * 8] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - 1] + 6 - i];

  839.                 if (s->intra4x4_pred_mode_cache[scan8[0] - 1] == -1)

  840.                     s->left_samples_available = 0x5F5F;

  841.             }

  842.             if (s->mb_y > 0) {

  843.                 s->intra4x4_pred_mode_cache[4 + 8 * 0] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride] + 0];

  844.                 s->intra4x4_pred_mode_cache[5 + 8 * 0] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride] + 1];

  845.                 s->intra4x4_pred_mode_cache[6 + 8 * 0] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride] + 2];

  846.                 s->intra4x4_pred_mode_cache[7 + 8 * 0] = s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride] + 3];

  847. 

  848.                 if (s->intra4x4_pred_mode_cache[4 + 8 * 0] == -1)

  849.                     s->top_samples_available = 0x33FF;

  850.             }

  851. 

  852.             /* decode prediction codes for luma blocks */

  853.             for (i = 0; i < 16; i += 2) {

  854.                 vlc = get_interleaved_ue_golomb(&s->gb_slice);

  855. 

  856.                 if (vlc >= 25U) {

  857.                     av_log(s->avctx, AV_LOG_ERROR,

  858.                            "luma prediction:%"PRIu32"\n", vlc);

  859.                     return -1;

  860.                 }

  861. 

  862.                 left = &s->intra4x4_pred_mode_cache[scan8[i] - 1];

  863.                 top  = &s->intra4x4_pred_mode_cache[scan8[i] - 8];

  864. 

  865.                 left[1] = svq3_pred_1[top[0] + 1][left[0] + 1][svq3_pred_0[vlc][0]];

  866.                 left[2] = svq3_pred_1[top[1] + 1][left[1] + 1][svq3_pred_0[vlc][1]];

  867. 

  868.                 if (left[1] == -1 || left[2] == -1) {

  869.                     av_log(s->avctx, AV_LOG_ERROR, "weird prediction\n");

  870.                     return -1;

  871.                 }

  872.             }

  873.         } else {    /* mb_type == 33, DC_128_PRED block type */

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

  875.                 memset(&s->intra4x4_pred_mode_cache[scan8[0] + 8 * i], DC_PRED, 4);

  876.         }

  877. 

  878.         AV_COPY32(i4x4, i4x4_cache + 4 + 8 * 4);

  879.         i4x4[4] = i4x4_cache[7 + 8 * 3];

  880.         i4x4[5] = i4x4_cache[7 + 8 * 2];

  881.         i4x4[6] = i4x4_cache[7 + 8 * 1];

  882. 

  883.         if (mb_type == 8) {

  884.             ff_h264_check_intra4x4_pred_mode(s->intra4x4_pred_mode_cache,

  885.                                              s->avctx, s->top_samples_available,

  886.                                              s->left_samples_available);

  887. 

  888.             s->top_samples_available  = (s->mb_y == 0) ? 0x33FF : 0xFFFF;

  889.             s->left_samples_available = (s->mb_x == 0) ? 0x5F5F : 0xFFFF;

  890.         } else {

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

  892.                 memset(&s->intra4x4_pred_mode_cache[scan8[0] + 8 * i], DC_128_PRED, 4);

  893. 

  894.             s->top_samples_available  = 0x33FF;

  895.             s->left_samples_available = 0x5F5F;

  896.         }

  897. 

  898.         mb_type = MB_TYPE_INTRA4x4;

  899.     } else {                      /* INTRA16x16 */

  900.         dir = ff_h264_i_mb_type_info[mb_type - 8].pred_mode;

  901.         dir = (dir >> 1) ^ 3 * (dir & 1) ^ 1;

  902. 

  903.         if ((s->intra16x16_pred_mode = ff_h264_check_intra_pred_mode(s->avctx, s->top_samples_available,

  904.                                                                      s->left_samples_available, dir, 0)) < 0) {

  905.             av_log(s->avctx, AV_LOG_ERROR, "ff_h264_check_intra_pred_mode < 0\n");

  906.             return s->intra16x16_pred_mode;

  907.         }

  908. 

  909.         cbp     = ff_h264_i_mb_type_info[mb_type - 8].cbp;

  910.         mb_type = MB_TYPE_INTRA16x16;

  911.     }

  912. 

  913.     if (!IS_INTER(mb_type) && s->pict_type != AV_PICTURE_TYPE_I) {

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

  915.             memset(s->cur_pic->motion_val[0][b_xy + i * s->b_stride],

  916.                    0, 4 * 2 * sizeof(int16_t));

  917.         if (s->pict_type == AV_PICTURE_TYPE_B) {

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

  919.                 memset(s->cur_pic->motion_val[1][b_xy + i * s->b_stride],

  920.                        0, 4 * 2 * sizeof(int16_t));

  921.         }

  922.     }

  923.     if (!IS_INTRA4x4(mb_type)) {

  924.         memset(s->intra4x4_pred_mode + s->mb2br_xy[mb_xy], DC_PRED, 8);

  925.     }

  926.     if (!IS_SKIP(mb_type) || s->pict_type == AV_PICTURE_TYPE_B) {

  927.         memset(s->non_zero_count_cache + 8, 0, 14 * 8 * sizeof(uint8_t));

  928.     }

  929. 

  930.     if (!IS_INTRA16x16(mb_type) &&

  931.         (!IS_SKIP(mb_type) || s->pict_type == AV_PICTURE_TYPE_B)) {

  932.         if ((vlc = get_interleaved_ue_golomb(&s->gb_slice)) >= 48U){

  933.             av_log(s->avctx, AV_LOG_ERROR, "cbp_vlc=%"PRIu32"\n", vlc);

  934.             return -1;

  935.         }

  936. 

  937.         cbp = IS_INTRA(mb_type) ? ff_h264_golomb_to_intra4x4_cbp[vlc]

  938.                                 : ff_h264_golomb_to_inter_cbp[vlc];

  939.     }

  940.     if (IS_INTRA16x16(mb_type) ||

  941.         (s->pict_type != AV_PICTURE_TYPE_I && s->adaptive_quant && cbp)) {

  942.         s->qscale += get_interleaved_se_golomb(&s->gb_slice);

  943. 

  944.         if (s->qscale > 31u) {

  945.             av_log(s->avctx, AV_LOG_ERROR, "qscale:%d\n", s->qscale);

  946.             return -1;

  947.         }

  948.     }

  949.     if (IS_INTRA16x16(mb_type)) {

  950.         AV_ZERO128(s->mb_luma_dc[0] + 0);

  951.         AV_ZERO128(s->mb_luma_dc[0] + 8);

  952.         if (svq3_decode_block(&s->gb_slice, s->mb_luma_dc[0], 0, 1)) {

  953.             av_log(s->avctx, AV_LOG_ERROR,

  954.                    "error while decoding intra luma dc\n");

  955.             return -1;

  956.         }

  957.     }

  958. 

  959.     if (cbp) {

  960.         const int index = IS_INTRA16x16(mb_type) ? 1 : 0;

  961.         const int type  = ((s->qscale < 24 && IS_INTRA4x4(mb_type)) ? 2 : 1);

  962. 

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

  964.             if ((cbp & (1 << i))) {

  965.                 for (j = 0; j < 4; j++) {

  966.                     k = index ? (1 * (j & 1) + 2 * (i & 1) +

  967.                                  2 * (j & 2) + 4 * (i & 2))

  968.                               : (4 * i + j);

  969.                     s->non_zero_count_cache[scan8[k]] = 1;

  970. 

  971.                     if (svq3_decode_block(&s->gb_slice, &s->mb[16 * k], index, type)) {

  972.                         av_log(s->avctx, AV_LOG_ERROR,

  973.                                "error while decoding block\n");

  974.                         return -1;

  975.                     }

  976.                 }

  977.             }

  978. 

  979.         if ((cbp & 0x30)) {

  980.             for (i = 1; i < 3; ++i)

  981.                 if (svq3_decode_block(&s->gb_slice, &s->mb[16 * 16 * i], 0, 3)) {

  982.                     av_log(s->avctx, AV_LOG_ERROR,

  983.                            "error while decoding chroma dc block\n");

  984.                     return -1;

  985.                 }

  986. 

  987.             if ((cbp & 0x20)) {

  988.                 for (i = 1; i < 3; i++) {

  989.                     for (j = 0; j < 4; j++) {

  990.                         k                                 = 16 * i + j;

  991.                         s->non_zero_count_cache[scan8[k]] = 1;

  992. 

  993.                         if (svq3_decode_block(&s->gb_slice, &s->mb[16 * k], 1, 1)) {

  994.                             av_log(s->avctx, AV_LOG_ERROR,

  995.                                    "error while decoding chroma ac block\n");

  996.                             return -1;

  997.                         }

  998.                     }

  999.                 }

  1000.             }

  1001.         }

  1002.     }

  1003. 

  1004.     s->cbp                     = cbp;

  1005.     s->cur_pic->mb_type[mb_xy] = mb_type;

  1006. 

  1007.     if (IS_INTRA(mb_type))

  1008.         s->chroma_pred_mode = ff_h264_check_intra_pred_mode(s->avctx, s->top_samples_available,

  1009.                                                             s->left_samples_available, DC_PRED8x8, 1);

  1010. 

  1011.     return 0;

  1012. }

  1013. 

  1014. static int svq3_decode_slice_header(AVCodecContext *avctx)

  1015. {

  1016.     SVQ3Context *s = avctx->priv_data;

  1017.     const int mb_xy   = s->mb_xy;

  1018.     int i, header;

  1019.     unsigned slice_id;

  1020. 

  1021.     header = get_bits(&s->gb, 8);

  1022. 

  1023.     if (((header & 0x9F) != 1 && (header & 0x9F) != 2) || (header & 0x60) == 0) {

  1024.         /* TODO: what? */

  1025.         av_log(avctx, AV_LOG_ERROR, "unsupported slice header (%02X)\n", header);

  1026.         return -1;

  1027.     } else {

  1028.         int slice_bits, slice_bytes, slice_length;

  1029.         int length = header >> 5 & 3;

  1030. 

  1031.         slice_length = show_bits(&s->gb, 8 * length);

  1032.         slice_bits   = slice_length * 8;

  1033.         slice_bytes  = slice_length + length - 1;

  1034. 

  1035.         skip_bits(&s->gb, 8);

  1036. 

  1037.         av_fast_malloc(&s->slice_buf, &s->slice_size, slice_bytes + AV_INPUT_BUFFER_PADDING_SIZE);

  1038.         if (!s->slice_buf)

  1039.             return AVERROR(ENOMEM);

  1040. 

  1041.         if (slice_bytes * 8LL > get_bits_left(&s->gb)) {

  1042.             av_log(avctx, AV_LOG_ERROR, "slice after bitstream end\n");

  1043.             return AVERROR_INVALIDDATA;

  1044.         }

  1045.         memcpy(s->slice_buf, s->gb.buffer + s->gb.index / 8, slice_bytes);

  1046. 

  1047.         if (s->watermark_key) {

  1048.             uint32_t header = AV_RL32(&s->slice_buf[1]);

  1049.             AV_WL32(&s->slice_buf[1], header ^ s->watermark_key);

  1050.         }

  1051.         init_get_bits(&s->gb_slice, s->slice_buf, slice_bits);

  1052. 

  1053.         if (length > 0) {

  1054.             memmove(s->slice_buf, &s->slice_buf[slice_length], length - 1);

  1055.         }

  1056.         skip_bits_long(&s->gb, slice_bytes * 8);

  1057.     }

  1058. 

  1059.     if ((slice_id = get_interleaved_ue_golomb(&s->gb_slice)) >= 3) {

  1060.         av_log(s->avctx, AV_LOG_ERROR, "illegal slice type %u \n", slice_id);

  1061.         return -1;

  1062.     }

  1063. 

  1064.     s->slice_type = ff_h264_golomb_to_pict_type[slice_id];

  1065. 

  1066.     if ((header & 0x9F) == 2) {

  1067.         i = (s->mb_num < 64) ? 6 : (1 + av_log2(s->mb_num - 1));

  1068.         get_bits(&s->gb_slice, i);

  1069.     } else if (get_bits1(&s->gb_slice)) {

  1070.         avpriv_report_missing_feature(s->avctx, "Media key encryption");

  1071.         return AVERROR_PATCHWELCOME;

  1072.     }

  1073. 

  1074.     s->slice_num      = get_bits(&s->gb_slice, 8);

  1075.     s->qscale         = get_bits(&s->gb_slice, 5);

  1076.     s->adaptive_quant = get_bits1(&s->gb_slice);

  1077. 

  1078.     /* unknown fields */

  1079.     skip_bits1(&s->gb_slice);

  1080. 

  1081.     if (s->has_watermark)

  1082.         skip_bits1(&s->gb_slice);

  1083. 

  1084.     skip_bits1(&s->gb_slice);

  1085.     skip_bits(&s->gb_slice, 2);

  1086. 

  1087.     if (skip_1stop_8data_bits(&s->gb_slice) < 0)

  1088.         return AVERROR_INVALIDDATA;

  1089. 

  1090.     /* reset intra predictors and invalidate motion vector references */

  1091.     if (s->mb_x > 0) {

  1092.         memset(s->intra4x4_pred_mode + s->mb2br_xy[mb_xy - 1] + 3,

  1093.                -1, 4 * sizeof(int8_t));

  1094.         memset(s->intra4x4_pred_mode + s->mb2br_xy[mb_xy - s->mb_x],

  1095.                -1, 8 * sizeof(int8_t) * s->mb_x);

  1096.     }

  1097.     if (s->mb_y > 0) {

  1098.         memset(s->intra4x4_pred_mode + s->mb2br_xy[mb_xy - s->mb_stride],

  1099.                -1, 8 * sizeof(int8_t) * (s->mb_width - s->mb_x));

  1100. 

  1101.         if (s->mb_x > 0)

  1102.             s->intra4x4_pred_mode[s->mb2br_xy[mb_xy - s->mb_stride - 1] + 3] = -1;

  1103.     }

  1104. 

  1105.     return 0;

  1106. }

  1107. 

  1108. static void init_dequant4_coeff_table(SVQ3Context *s)

  1109. {

  1110.     int q, x;

  1111.     const int max_qp = 51;

  1112. 

  1113.     for (q = 0; q < max_qp + 1; q++) {

  1114.         int shift = ff_h264_quant_div6[q] + 2;

  1115.         int idx   = ff_h264_quant_rem6[q];

  1116.         for (x = 0; x < 16; x++)

  1117.             s->dequant4_coeff[q][(x >> 2) | ((x << 2) & 0xF)] =

  1118.                 ((uint32_t)ff_h264_dequant4_coeff_init[idx][(x & 1) + ((x >> 2) & 1)] * 16) << shift;

  1119.     }

  1120. }

  1121. 

  1122. static av_cold int svq3_decode_init(AVCodecContext *avctx)

  1123. {

  1124.     SVQ3Context *s = avctx->priv_data;

  1125.     int m, x, y;

  1126.     unsigned char *extradata;

  1127.     unsigned char *extradata_end;

  1128.     unsigned int size;

  1129.     int marker_found = 0;

  1130.     int ret;

  1131. 

  1132.     s->cur_pic  = &s->frames[0];

  1133.     s->last_pic = &s->frames[1];

  1134.     s->next_pic = &s->frames[2];

  1135. 

  1136.     s->cur_pic->f  = av_frame_alloc();

  1137.     s->last_pic->f = av_frame_alloc();

  1138.     s->next_pic->f = av_frame_alloc();

  1139.     if (!s->cur_pic->f || !s->last_pic->f || !s->next_pic->f)

  1140.         return AVERROR(ENOMEM);

  1141. 

  1142.     ff_h264dsp_init(&s->h264dsp, 8, 1);

  1143.     ff_h264_pred_init(&s->hpc, AV_CODEC_ID_SVQ3, 8, 1);

  1144.     ff_videodsp_init(&s->vdsp, 8);

  1145. 

  1146. 

  1147.     avctx->bits_per_raw_sample = 8;

  1148. 

  1149.     ff_hpeldsp_init(&s->hdsp, avctx->flags);

  1150.     ff_tpeldsp_init(&s->tdsp);

  1151. 

  1152.     avctx->pix_fmt     = AV_PIX_FMT_YUVJ420P;

  1153.     avctx->color_range = AVCOL_RANGE_JPEG;

  1154. 

  1155.     s->avctx         = avctx;

  1156.     s->halfpel_flag  = 1;

  1157.     s->thirdpel_flag = 1;

  1158.     s->has_watermark = 0;

  1159. 

  1160.     /* prowl for the "SEQH" marker in the extradata */

  1161.     extradata     = (unsigned char *)avctx->extradata;

  1162.     extradata_end = avctx->extradata + avctx->extradata_size;

  1163.     if (extradata) {

  1164.         for (m = 0; m + 8 < avctx->extradata_size; m++) {

  1165.             if (!memcmp(extradata, "SEQH", 4)) {

  1166.                 marker_found = 1;

  1167.                 break;

  1168.             }

  1169.             extradata++;

  1170.         }

  1171.     }

  1172. 

  1173.     /* if a match was found, parse the extra data */

  1174.     if (marker_found) {

  1175.         GetBitContext gb;

  1176.         int frame_size_code;

  1177.         int unk0, unk1, unk2, unk3, unk4;

  1178.         int w,h;

  1179. 

  1180.         size = AV_RB32(&extradata[4]);

  1181.         if (size > extradata_end - extradata - 8)

  1182.             return AVERROR_INVALIDDATA;

  1183.         init_get_bits(&gb, extradata + 8, size * 8);

  1184. 

  1185.         /* 'frame size code' and optional 'width, height' */

  1186.         frame_size_code = get_bits(&gb, 3);

  1187.         switch (frame_size_code) {

  1188.         case 0:

  1189.             w = 160;

  1190.             h = 120;

  1191.             break;

  1192.         case 1:

  1193.             w = 128;

  1194.             h =  96;

  1195.             break;

  1196.         case 2:

  1197.             w = 176;

  1198.             h = 144;

  1199.             break;

  1200.         case 3:

  1201.             w = 352;

  1202.             h = 288;

  1203.             break;

  1204.         case 4:

  1205.             w = 704;

  1206.             h = 576;

  1207.             break;

  1208.         case 5:

  1209.             w = 240;

  1210.             h = 180;

  1211.             break;

  1212.         case 6:

  1213.             w = 320;

  1214.             h = 240;

  1215.             break;

  1216.         case 7:

  1217.             w = get_bits(&gb, 12);

  1218.             h = get_bits(&gb, 12);

  1219.             break;

  1220.         }

  1221.         ret = ff_set_dimensions(avctx, w, h);

  1222.         if (ret < 0)

  1223.             return ret;

  1224. 

  1225.         s->halfpel_flag  = get_bits1(&gb);

  1226.         s->thirdpel_flag = get_bits1(&gb);

  1227. 

  1228.         /* unknown fields */

  1229.         unk0 = get_bits1(&gb);

  1230.         unk1 = get_bits1(&gb);

  1231.         unk2 = get_bits1(&gb);

  1232.         unk3 = get_bits1(&gb);

  1233. 

  1234.         s->low_delay = get_bits1(&gb);

  1235. 

  1236.         /* unknown field */

  1237.         unk4 = get_bits1(&gb);

  1238. 

  1239.         av_log(avctx, AV_LOG_DEBUG, "Unknown fields %d %d %d %d %d\n",

  1240.                unk0, unk1, unk2, unk3, unk4);

  1241. 

  1242.         if (skip_1stop_8data_bits(&gb) < 0)

  1243.             return AVERROR_INVALIDDATA;

  1244. 

  1245.         s->has_watermark  = get_bits1(&gb);

  1246.         avctx->has_b_frames = !s->low_delay;

  1247.         if (s->has_watermark) {

  1248. #if CONFIG_ZLIB

  1249.             unsigned watermark_width  = get_interleaved_ue_golomb(&gb);

  1250.             unsigned watermark_height = get_interleaved_ue_golomb(&gb);

  1251.             int u1                    = get_interleaved_ue_golomb(&gb);

  1252.             int u2                    = get_bits(&gb, 8);

  1253.             int u3                    = get_bits(&gb, 2);

  1254.             int u4                    = get_interleaved_ue_golomb(&gb);

  1255.             unsigned long buf_len     = watermark_width *

  1256.                                         watermark_height * 4;

  1257.             int offset                = get_bits_count(&gb) + 7 >> 3;

  1258.             uint8_t *buf;

  1259. 

  1260.             if (watermark_height <= 0 ||

  1261.                 (uint64_t)watermark_width * 4 > UINT_MAX / watermark_height)

  1262.                 return AVERROR_INVALIDDATA;

  1263. 

  1264.             buf = av_malloc(buf_len);

  1265.             if (!buf)

  1266.                 return AVERROR(ENOMEM);

  1267. 

  1268.             av_log(avctx, AV_LOG_DEBUG, "watermark size: %ux%u\n",

  1269.                    watermark_width, watermark_height);

  1270.             av_log(avctx, AV_LOG_DEBUG,

  1271.                    "u1: %x u2: %x u3: %x compressed data size: %d offset: %d\n",

  1272.                    u1, u2, u3, u4, offset);

  1273.             if (uncompress(buf, &buf_len, extradata + 8 + offset,

  1274.                            size - offset) != Z_OK) {

  1275.                 av_log(avctx, AV_LOG_ERROR,

  1276.                        "could not uncompress watermark logo\n");

  1277.                 av_free(buf);

  1278.                 return -1;

  1279.             }

  1280.             s->watermark_key = av_bswap16(av_crc(av_crc_get_table(AV_CRC_16_CCITT), 0, buf, buf_len));

  1281. 

  1282.             s->watermark_key = s->watermark_key << 16 | s->watermark_key;

  1283.             av_log(avctx, AV_LOG_DEBUG,

  1284.                    "watermark key %#"PRIx32"\n", s->watermark_key);

  1285.             av_free(buf);

  1286. #else

  1287.             av_log(avctx, AV_LOG_ERROR,

  1288.                    "this svq3 file contains watermark which need zlib support compiled in\n");

  1289.             return AVERROR(ENOSYS);

  1290. #endif

  1291.         }

  1292.     }

  1293. 

  1294.     s->mb_width   = (avctx->width + 15) / 16;

  1295.     s->mb_height  = (avctx->height + 15) / 16;

  1296.     s->mb_stride  = s->mb_width + 1;

  1297.     s->mb_num     = s->mb_width * s->mb_height;

  1298.     s->b_stride   = 4 * s->mb_width;

  1299.     s->h_edge_pos = s->mb_width * 16;

  1300.     s->v_edge_pos = s->mb_height * 16;

  1301. 

  1302.     s->intra4x4_pred_mode = av_mallocz(s->mb_stride * 2 * 8);

  1303.     if (!s->intra4x4_pred_mode)

  1304.         return AVERROR(ENOMEM);

  1305. 

  1306.     s->mb2br_xy = av_mallocz(s->mb_stride * (s->mb_height + 1) *

  1307.                              sizeof(*s->mb2br_xy));

  1308.     if (!s->mb2br_xy)

  1309.         return AVERROR(ENOMEM);

  1310. 

  1311.     for (y = 0; y < s->mb_height; y++)

  1312.         for (x = 0; x < s->mb_width; x++) {

  1313.             const int mb_xy = x + y * s->mb_stride;

  1314. 

  1315.             s->mb2br_xy[mb_xy] = 8 * (mb_xy % (2 * s->mb_stride));

  1316.         }

  1317. 

  1318.     init_dequant4_coeff_table(s);

  1319. 

  1320.     return 0;

  1321. }

  1322. 

  1323. static void free_picture(AVCodecContext *avctx, SVQ3Frame *pic)

  1324. {

  1325.     int i;

  1326.     for (i = 0; i < 2; i++) {

  1327.         av_freep(&pic->motion_val_buf[i]);

  1328.     }

  1329.     av_freep(&pic->mb_type_buf);

  1330. 

  1331.     av_frame_unref(pic->f);

  1332. }

  1333. 

  1334. static int get_buffer(AVCodecContext *avctx, SVQ3Frame *pic)

  1335. {

  1336.     SVQ3Context *s = avctx->priv_data;

  1337.     const int big_mb_num    = s->mb_stride * (s->mb_height + 1) + 1;

  1338.     const int b4_stride     = s->mb_width * 4 + 1;

  1339.     const int b4_array_size = b4_stride * s->mb_height * 4;

  1340.     int ret;

  1341. 

  1342.     if (!pic->motion_val_buf[0]) {

  1343.         int i;

  1344. 

  1345.         pic->mb_type_buf = av_calloc(big_mb_num + s->mb_stride, sizeof(uint32_t));

  1346.         if (!pic->mb_type_buf)

  1347.             return AVERROR(ENOMEM);

  1348.         pic->mb_type = pic->mb_type_buf + 2 * s->mb_stride + 1;

  1349. 

  1350.         for (i = 0; i < 2; i++) {

  1351.             pic->motion_val_buf[i] = av_calloc(b4_array_size + 4, 2 * sizeof(int16_t));

  1352.             if (!pic->motion_val_buf[i]) {

  1353.                 ret = AVERROR(ENOMEM);

  1354.                 goto fail;

  1355.             }

  1356. 

  1357.             pic->motion_val[i] = pic->motion_val_buf[i] + 4;

  1358.         }

  1359.     }

  1360. 

  1361.     ret = ff_get_buffer(avctx, pic->f,

  1362.                         (s->pict_type != AV_PICTURE_TYPE_B) ?

  1363.                          AV_GET_BUFFER_FLAG_REF : 0);

  1364.     if (ret < 0)

  1365.         goto fail;

  1366. 

  1367.     if (!s->edge_emu_buffer) {

  1368.         s->edge_emu_buffer = av_mallocz_array(pic->f->linesize[0], 17);

  1369.         if (!s->edge_emu_buffer)

  1370.             return AVERROR(ENOMEM);

  1371.     }

  1372. 

  1373.     return 0;

  1374. fail:

  1375.     free_picture(avctx, pic);

  1376.     return ret;

  1377. }

  1378. 

  1379. static int svq3_decode_frame(AVCodecContext *avctx, void *data,

  1380.                              int *got_frame, AVPacket *avpkt)

  1381. {

  1382.     SVQ3Context *s     = avctx->priv_data;

  1383.     int buf_size       = avpkt->size;

  1384.     int left;

  1385.     uint8_t *buf;

  1386.     int ret, m, i;

  1387. 

  1388.     /* special case for last picture */

  1389.     if (buf_size == 0) {

  1390.         if (s->next_pic->f->data[0] && !s->low_delay && !s->last_frame_output) {

  1391.             ret = av_frame_ref(data, s->next_pic->f);

  1392.             if (ret < 0)

  1393.                 return ret;

  1394.             s->last_frame_output = 1;

  1395.             *got_frame          = 1;

  1396.         }

  1397.         return 0;

  1398.     }

  1399. 

  1400.     s->mb_x = s->mb_y = s->mb_xy = 0;

  1401. 

  1402.     if (s->watermark_key) {

  1403.         av_fast_padded_malloc(&s->buf, &s->buf_size, buf_size);

  1404.         if (!s->buf)

  1405.             return AVERROR(ENOMEM);

  1406.         memcpy(s->buf, avpkt->data, buf_size);

  1407.         buf = s->buf;

  1408.     } else {

  1409.         buf = avpkt->data;

  1410.     }

  1411. 

  1412.     ret = init_get_bits(&s->gb, buf, 8 * buf_size);

  1413.     if (ret < 0)

  1414.         return ret;

  1415. 

  1416.     if (svq3_decode_slice_header(avctx))

  1417.         return -1;

  1418. 

  1419.     s->pict_type = s->slice_type;

  1420. 

  1421.     if (s->pict_type != AV_PICTURE_TYPE_B)

  1422.         FFSWAP(SVQ3Frame*, s->next_pic, s->last_pic);

  1423. 

  1424.     av_frame_unref(s->cur_pic->f);

  1425. 

  1426.     /* for skipping the frame */

  1427.     s->cur_pic->f->pict_type = s->pict_type;

  1428.     s->cur_pic->f->key_frame = (s->pict_type == AV_PICTURE_TYPE_I);

  1429. 

  1430.     ret = get_buffer(avctx, s->cur_pic);

  1431.     if (ret < 0)

  1432.         return ret;

  1433. 

  1434.     for (i = 0; i < 16; i++) {

  1435.         s->block_offset[i]           = (4 * ((scan8[i] - scan8[0]) & 7)) + 4 * s->cur_pic->f->linesize[0] * ((scan8[i] - scan8[0]) >> 3);

  1436.         s->block_offset[48 + i]      = (4 * ((scan8[i] - scan8[0]) & 7)) + 8 * s->cur_pic->f->linesize[0] * ((scan8[i] - scan8[0]) >> 3);

  1437.     }

  1438.     for (i = 0; i < 16; i++) {

  1439.         s->block_offset[16 + i]      =

  1440.         s->block_offset[32 + i]      = (4 * ((scan8[i] - scan8[0]) & 7)) + 4 * s->cur_pic->f->linesize[1] * ((scan8[i] - scan8[0]) >> 3);

  1441.         s->block_offset[48 + 16 + i] =

  1442.         s->block_offset[48 + 32 + i] = (4 * ((scan8[i] - scan8[0]) & 7)) + 8 * s->cur_pic->f->linesize[1] * ((scan8[i] - scan8[0]) >> 3);

  1443.     }

  1444. 

  1445.     if (s->pict_type != AV_PICTURE_TYPE_I) {

  1446.         if (!s->last_pic->f->data[0]) {

  1447.             av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");

  1448.             av_frame_unref(s->last_pic->f);

  1449.             ret = get_buffer(avctx, s->last_pic);

  1450.             if (ret < 0)

  1451.                 return ret;

  1452.             memset(s->last_pic->f->data[0], 0, avctx->height * s->last_pic->f->linesize[0]);

  1453.             memset(s->last_pic->f->data[1], 0x80, (avctx->height / 2) *

  1454.                    s->last_pic->f->linesize[1]);

  1455.             memset(s->last_pic->f->data[2], 0x80, (avctx->height / 2) *

  1456.                    s->last_pic->f->linesize[2]);

  1457.         }

  1458. 

  1459.         if (s->pict_type == AV_PICTURE_TYPE_B && !s->next_pic->f->data[0]) {

  1460.             av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n");

  1461.             av_frame_unref(s->next_pic->f);

  1462.             ret = get_buffer(avctx, s->next_pic);

  1463.             if (ret < 0)

  1464.                 return ret;

  1465.             memset(s->next_pic->f->data[0], 0, avctx->height * s->next_pic->f->linesize[0]);

  1466.             memset(s->next_pic->f->data[1], 0x80, (avctx->height / 2) *

  1467.                    s->next_pic->f->linesize[1]);

  1468.             memset(s->next_pic->f->data[2], 0x80, (avctx->height / 2) *

  1469.                    s->next_pic->f->linesize[2]);

  1470.         }

  1471.     }

  1472. 

  1473.     if (avctx->debug & FF_DEBUG_PICT_INFO)

  1474.         av_log(s->avctx, AV_LOG_DEBUG,

  1475.                "%c hpel:%d, tpel:%d aqp:%d qp:%d, slice_num:%02X\n",

  1476.                av_get_picture_type_char(s->pict_type),

  1477.                s->halfpel_flag, s->thirdpel_flag,

  1478.                s->adaptive_quant, s->qscale, s->slice_num);

  1479. 

  1480.     if (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type == AV_PICTURE_TYPE_B ||

  1481.         avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type != AV_PICTURE_TYPE_I ||

  1482.         avctx->skip_frame >= AVDISCARD_ALL)

  1483.         return 0;

  1484. 

  1485.     if (s->next_p_frame_damaged) {

  1486.         if (s->pict_type == AV_PICTURE_TYPE_B)

  1487.             return 0;

  1488.         else

  1489.             s->next_p_frame_damaged = 0;

  1490.     }

  1491. 

  1492.     if (s->pict_type == AV_PICTURE_TYPE_B) {

  1493.         s->frame_num_offset = s->slice_num - s->prev_frame_num;

  1494. 

  1495.         if (s->frame_num_offset < 0)

  1496.             s->frame_num_offset += 256;

  1497.         if (s->frame_num_offset == 0 ||

  1498.             s->frame_num_offset >= s->prev_frame_num_offset) {

  1499.             av_log(s->avctx, AV_LOG_ERROR, "error in B-frame picture id\n");

  1500.             return -1;

  1501.         }

  1502.     } else {

  1503.         s->prev_frame_num        = s->frame_num;

  1504.         s->frame_num             = s->slice_num;

  1505.         s->prev_frame_num_offset = s->frame_num - s->prev_frame_num;

  1506. 

  1507.         if (s->prev_frame_num_offset < 0)

  1508.             s->prev_frame_num_offset += 256;

  1509.     }

  1510. 

  1511.     for (m = 0; m < 2; m++) {

  1512.         int i;

  1513.         for (i = 0; i < 4; i++) {

  1514.             int j;

  1515.             for (j = -1; j < 4; j++)

  1516.                 s->ref_cache[m][scan8[0] + 8 * i + j] = 1;

  1517.             if (i < 3)

  1518.                 s->ref_cache[m][scan8[0] + 8 * i + j] = PART_NOT_AVAILABLE;

  1519.         }

  1520.     }

  1521. 

  1522.     for (s->mb_y = 0; s->mb_y < s->mb_height; s->mb_y++) {

  1523.         for (s->mb_x = 0; s->mb_x < s->mb_width; s->mb_x++) {

  1524.             unsigned mb_type;

  1525.             s->mb_xy = s->mb_x + s->mb_y * s->mb_stride;

  1526. 

  1527.             if ((get_bits_left(&s->gb_slice)) <= 7) {

  1528.                 if (((get_bits_count(&s->gb_slice) & 7) == 0 ||

  1529.                     show_bits(&s->gb_slice, get_bits_left(&s->gb_slice) & 7) == 0)) {

  1530. 

  1531.                     if (svq3_decode_slice_header(avctx))

  1532.                         return -1;

  1533.                 }

  1534.                 if (s->slice_type != s->pict_type) {

  1535.                     avpriv_request_sample(avctx, "non constant slice type");

  1536.                 }

  1537.                 /* TODO: support s->mb_skip_run */

  1538.             }

  1539. 

  1540.             mb_type = get_interleaved_ue_golomb(&s->gb_slice);

  1541. 

  1542.             if (s->pict_type == AV_PICTURE_TYPE_I)

  1543.                 mb_type += 8;

  1544.             else if (s->pict_type == AV_PICTURE_TYPE_B && mb_type >= 4)

  1545.                 mb_type += 4;

  1546.             if (mb_type > 33 || svq3_decode_mb(s, mb_type)) {

  1547.                 av_log(s->avctx, AV_LOG_ERROR,

  1548.                        "error while decoding MB %d %d\n", s->mb_x, s->mb_y);

  1549.                 return -1;

  1550.             }

  1551. 

  1552.             if (mb_type != 0 || s->cbp)

  1553.                 hl_decode_mb(s);

  1554. 

  1555.             if (s->pict_type != AV_PICTURE_TYPE_B && !s->low_delay)

  1556.                 s->cur_pic->mb_type[s->mb_x + s->mb_y * s->mb_stride] =

  1557.                     (s->pict_type == AV_PICTURE_TYPE_P && mb_type < 8) ? (mb_type - 1) : -1;

  1558.         }

  1559. 

  1560.         ff_draw_horiz_band(avctx, s->cur_pic->f,

  1561.                            s->last_pic->f->data[0] ? s->last_pic->f : NULL,

  1562.                            16 * s->mb_y, 16, PICT_FRAME, 0,

  1563.                            s->low_delay);

  1564.     }

  1565. 

  1566.     left = buf_size*8 - get_bits_count(&s->gb_slice);

  1567. 

  1568.     if (s->mb_y != s->mb_height || s->mb_x != s->mb_width) {

  1569.         av_log(avctx, AV_LOG_INFO, "frame num %d incomplete pic x %d y %d left %d\n", avctx->frame_number, s->mb_y, s->mb_x, left);

  1570.         //av_hex_dump(stderr, buf+buf_size-8, 8);

  1571.     }

  1572. 

  1573.     if (left < 0) {

  1574.         av_log(avctx, AV_LOG_ERROR, "frame num %d left %d\n", avctx->frame_number, left);

  1575.         return -1;

  1576.     }

  1577. 

  1578.     if (s->pict_type == AV_PICTURE_TYPE_B || s->low_delay)

  1579.         ret = av_frame_ref(data, s->cur_pic->f);

  1580.     else if (s->last_pic->f->data[0])

  1581.         ret = av_frame_ref(data, s->last_pic->f);

  1582.     if (ret < 0)

  1583.         return ret;

  1584. 

  1585.     /* Do not output the last pic after seeking. */

  1586.     if (s->last_pic->f->data[0] || s->low_delay)

  1587.         *got_frame = 1;

  1588. 

  1589.     if (s->pict_type != AV_PICTURE_TYPE_B) {

  1590.         FFSWAP(SVQ3Frame*, s->cur_pic, s->next_pic);

  1591.     } else {

  1592.         av_frame_unref(s->cur_pic->f);

  1593.     }

  1594. 

  1595.     return buf_size;

  1596. }

  1597. 

  1598. static av_cold int svq3_decode_end(AVCodecContext *avctx)

  1599. {

  1600.     SVQ3Context *s = avctx->priv_data;

  1601. 

  1602.     free_picture(avctx, s->cur_pic);

  1603.     free_picture(avctx, s->next_pic);

  1604.     free_picture(avctx, s->last_pic);

  1605.     av_frame_free(&s->cur_pic->f);

  1606.     av_frame_free(&s->next_pic->f);

  1607.     av_frame_free(&s->last_pic->f);

  1608.     av_freep(&s->slice_buf);

  1609.     av_freep(&s->intra4x4_pred_mode);

  1610.     av_freep(&s->edge_emu_buffer);

  1611.     av_freep(&s->mb2br_xy);

  1612. 

  1613. 

  1614.     av_freep(&s->buf);

  1615.     s->buf_size = 0;

  1616. 

  1617.     return 0;

  1618. }

  1619. 

  1620. AVCodec ff_svq3_decoder = {

  1621.     .name           = "svq3",

  1622.     .long_name      = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 3 / Sorenson Video 3 / SVQ3"),

  1623.     .type           = AVMEDIA_TYPE_VIDEO,

  1624.     .id             = AV_CODEC_ID_SVQ3,

  1625.     .priv_data_size = sizeof(SVQ3Context),

  1626.     .init           = svq3_decode_init,

  1627.     .close          = svq3_decode_end,

  1628.     .decode         = svq3_decode_frame,

  1629.     .capabilities   = AV_CODEC_CAP_DRAW_HORIZ_BAND |

  1630.                       AV_CODEC_CAP_DR1             |

  1631.                       AV_CODEC_CAP_DELAY,

  1632.     .pix_fmts       = (const enum AVPixelFormat[]) { AV_PIX_FMT_YUVJ420P,

  1633.                                                      AV_PIX_FMT_NONE},

  1634.     .caps_internal  = FF_CODEC_CAP_INIT_CLEANUP,

  1635. };