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FFmpeg/libavcodec/mpegvideo.h

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  1. /*

  2.  * Generic DCT based hybrid video encoder

  3.  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.

  4.  *

  5.  * This library is free software; you can redistribute it and/or

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

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

  8.  * version 2 of the License, or (at your option) any later version.

  9.  *

  10.  * This library is distributed in the hope that it will be useful,

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

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

  13.  * Lesser General Public License for more details.

  14.  *

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

  16.  * License along with this library; if not, write to the Free Software

  17.  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  18.  */

  19. 

  20. /**

  21.  * @file mpegvideo.h

  22.  * mpegvideo header.

  23.  */

  24.  

  25. #ifndef AVCODEC_MPEGVIDEO_H

  26. #define AVCODEC_MPEGVIDEO_H

  27. 

  28. #include "dsputil.h"

  29. 

  30. #define FRAME_SKIPED 100 ///< return value for header parsers if frame is not coded

  31. 

  32. enum OutputFormat {

  33.     FMT_MPEG1,

  34.     FMT_H263,

  35.     FMT_MJPEG, 

  36. };

  37. 

  38. #define EDGE_WIDTH 16

  39. 

  40. #define MPEG_BUF_SIZE (16 * 1024)

  41. 

  42. #define QMAT_SHIFT_MMX 16

  43. #define QMAT_SHIFT 22

  44. 

  45. #define MAX_FCODE 7

  46. #define MAX_MV 2048

  47. 

  48. #define MAX_PICTURE_COUNT 15

  49. 

  50. #define ME_MAP_SIZE 64

  51. #define ME_MAP_SHIFT 3

  52. #define ME_MAP_MV_BITS 11

  53. 

  54. /* run length table */

  55. #define MAX_RUN    64

  56. #define MAX_LEVEL  64

  57. 

  58. #define I_TYPE FF_I_TYPE  ///< Intra

  59. #define P_TYPE FF_P_TYPE  ///< Predicted

  60. #define B_TYPE FF_B_TYPE  ///< Bi-dir predicted

  61. #define S_TYPE FF_S_TYPE  ///< S(GMC)-VOP MPEG4

  62. 

  63. typedef struct Predictor{

  64.     double coeff;

  65.     double count;

  66.     double decay;

  67. } Predictor;

  68. 

  69. typedef struct RateControlEntry{

  70.     int pict_type;

  71.     float qscale;

  72.     int mv_bits;

  73.     int i_tex_bits;

  74.     int p_tex_bits;

  75.     int misc_bits;

  76.     uint64_t expected_bits;

  77.     int new_pict_type;

  78.     float new_qscale;

  79.     int mc_mb_var_sum;

  80.     int mb_var_sum;

  81.     int i_count;

  82.     int f_code;

  83.     int b_code;

  84. }RateControlEntry;

  85. 

  86. /**

  87.  * rate control context.

  88.  */

  89. typedef struct RateControlContext{

  90.     FILE *stats_file;

  91.     int num_entries;              ///< number of RateControlEntries 

  92.     RateControlEntry *entry;

  93.     int buffer_index;             ///< amount of bits in the video/audio buffer 

  94.     Predictor pred[5];

  95.     double short_term_qsum;       ///< sum of recent qscales 

  96.     double short_term_qcount;     ///< count of recent qscales 

  97.     double pass1_rc_eq_output_sum;///< sum of the output of the rc equation, this is used for normalization  

  98.     double pass1_wanted_bits;     ///< bits which should have been outputed by the pass1 code (including complexity init) 

  99.     double last_qscale;

  100.     double last_qscale_for[5];    ///< last qscale for a specific pict type, used for max_diff & ipb factor stuff 

  101.     int last_mc_mb_var_sum;

  102.     int last_mb_var_sum;

  103.     uint64_t i_cplx_sum[5];

  104.     uint64_t p_cplx_sum[5];

  105.     uint64_t mv_bits_sum[5];

  106.     uint64_t qscale_sum[5];

  107.     int frame_count[5];

  108.     int last_non_b_pict_type;

  109. }RateControlContext;

  110. 

  111. /**

  112.  * Scantable.

  113.  */

  114. typedef struct ScanTable{

  115.     const uint8_t *scantable;

  116.     uint8_t permutated[64];

  117.     uint8_t raster_end[64];

  118. #ifdef ARCH_POWERPC

  119. 		/** Used by dct_quantise_alitvec to find last-non-zero */

  120.     uint8_t __align8 inverse[64];

  121. #endif

  122. } ScanTable;

  123. 

  124. /**

  125.  * Picture.

  126.  */

  127. typedef struct Picture{

  128.     FF_COMMON_FRAME

  129. 

  130.     int mb_var_sum;             ///< sum of MB variance for current frame 

  131.     int mc_mb_var_sum;          ///< motion compensated MB variance for current frame 

  132.     uint16_t *mb_var;           ///< Table for MB variances 

  133.     uint16_t *mc_mb_var;        ///< Table for motion compensated MB variances 

  134.     uint8_t *mb_mean;           ///< Table for MB luminance 

  135.     int32_t *mb_cmp_score;	///< Table for MB cmp scores, for mb decission 

  136.     int b_frame_score;          /* */

  137. } Picture;

  138. 

  139. typedef struct ParseContext{

  140.     uint8_t *buffer;

  141.     int index;

  142.     int last_index;

  143.     int buffer_size;

  144.     int state;

  145.     int frame_start_found;

  146. } ParseContext;

  147. 

  148. struct MpegEncContext;

  149. 

  150. /**

  151.  * Motion estimation context.

  152.  */

  153. typedef struct MotionEstContext{

  154.     int skip;                          ///< set if ME is skiped for the current MB 

  155.     int co_located_mv[4][2];           ///< mv from last p frame for direct mode ME 

  156.     int direct_basis_mv[4][2];

  157.     uint8_t *scratchpad;               ///< data area for the me algo, so that the ME doesnt need to malloc/free 

  158.     uint32_t *map;                     ///< map to avoid duplicate evaluations 

  159.     uint32_t *score_map;               ///< map to store the scores 

  160.     int map_generation;  

  161.     int pre_penalty_factor;

  162.     int penalty_factor;

  163.     int sub_penalty_factor;

  164.     int mb_penalty_factor;

  165.     int pre_pass;                      ///< = 1 for the pre pass 

  166.     int dia_size;

  167.     uint16_t (*mv_penalty)[MAX_MV*2+1];  ///< amount of bits needed to encode a MV 

  168.     int (*sub_motion_search)(struct MpegEncContext * s,

  169. 				  int *mx_ptr, int *my_ptr, int dmin,

  170. 				  int xmin, int ymin, int xmax, int ymax,

  171.                                   int pred_x, int pred_y, Picture *ref_picture, 

  172.                                   int n, int size, uint16_t * const mv_penalty);

  173.     int (*motion_search[7])(struct MpegEncContext * s, int block,

  174.                              int *mx_ptr, int *my_ptr,

  175.                              int P[10][2], int pred_x, int pred_y,

  176.                              int xmin, int ymin, int xmax, int ymax, Picture *ref_picture, int16_t (*last_mv)[2], 

  177.                              int ref_mv_scale, uint16_t * const mv_penalty);

  178.     int (*pre_motion_search)(struct MpegEncContext * s, int block,

  179.                              int *mx_ptr, int *my_ptr,

  180.                              int P[10][2], int pred_x, int pred_y,

  181.                              int xmin, int ymin, int xmax, int ymax, Picture *ref_picture, int16_t (*last_mv)[2], 

  182.                              int ref_mv_scale, uint16_t * const mv_penalty);

  183.     int (*get_mb_score)(struct MpegEncContext * s, int mx, int my, int pred_x, int pred_y, Picture *ref_picture, 

  184.                                   uint16_t * const mv_penalty);

  185. }MotionEstContext;

  186. 

  187. /**

  188.  * MpegEncContext.

  189.  */

  190. typedef struct MpegEncContext {

  191.     struct AVCodecContext *avctx;

  192.     /* the following parameters must be initialized before encoding */

  193.     int width, height;///< picture size. must be a multiple of 16 

  194.     int gop_size;

  195.     int intra_only;   ///< if true, only intra pictures are generated 

  196.     int bit_rate;     ///< wanted bit rate 

  197.     int bit_rate_tolerance; ///< amount of +- bits (>0)

  198.     enum OutputFormat out_format; ///< output format 

  199.     int h263_pred;    ///< use mpeg4/h263 ac/dc predictions 

  200. 

  201. /* the following codec id fields are deprecated in favor of codec_id */

  202.     int h263_plus;    ///< h263 plus headers 

  203.     int h263_rv10;    ///< use RV10 variation for H263 

  204.     int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)

  205.     int h263_intel;   ///< use I263 intel h263 header 

  206.     

  207.     int codec_id;     /* see CODEC_ID_xxx */

  208.     int fixed_qscale; ///< fixed qscale if non zero 

  209.     float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0) 

  210.     float qblur;      ///< amount of qscale smoothing over time (0.0-1.0) 

  211.     int qmin;         ///< min qscale 

  212.     int qmax;         ///< max qscale 

  213.     int max_qdiff;    ///< max qscale difference between frames 

  214.     int encoding;     ///< true if we are encoding (vs decoding) 

  215.     int flags;        ///< AVCodecContext.flags (HQ, MV4, ...) 

  216.     int max_b_frames; ///< max number of b-frames for encoding 

  217.     int b_frame_strategy;

  218.     int luma_elim_threshold;

  219.     int chroma_elim_threshold;

  220.     int strict_std_compliance; ///< strictly follow the std (MPEG4, ...) 

  221.     int workaround_bugs;       ///< workaround bugs in encoders which cannot be detected automatically 

  222.     /* the following fields are managed internally by the encoder */

  223. 

  224.     /** bit output */

  225.     PutBitContext pb;

  226. 

  227.     /* sequence parameters */

  228.     int context_initialized;

  229.     int input_picture_number;

  230.     int picture_number;

  231.     int picture_in_gop_number; ///< 0-> first pic in gop, ... 

  232.     int b_frames_since_non_b;  ///< used for encoding, relative to not yet reordered input 

  233.     int mb_width, mb_height;   ///< number of MBs horizontally & vertically 

  234.     int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replicateion)

  235.     int mb_num;                ///< number of MBs of a picture 

  236.     int linesize;              ///< line size, in bytes, may be different from width 

  237.     int uvlinesize;            ///< line size, for chroma in bytes, may be different from width 

  238.     Picture picture[MAX_PICTURE_COUNT]; ///< main picture buffer 

  239.     Picture *input_picture[MAX_PICTURE_COUNT]; ///< next pictures on display order for encoding

  240.     Picture *reordered_input_picture[MAX_PICTURE_COUNT]; ///< pointer to the next pictures in codedorder for encoding

  241.     

  242.     /** 

  243.      * copy of the previous picture structure.

  244.      * note, linesize & data, might not match the previous picture (for field pictures)

  245.      */

  246.     Picture last_picture;       

  247.     

  248.     /** 

  249.      * copy of the next picture structure.

  250.      * note, linesize & data, might not match the next picture (for field pictures)

  251.      */

  252.     Picture next_picture;

  253.     

  254.     /** 

  255.      * copy of the source picture structure for encoding.

  256.      * note, linesize & data, might not match the source picture (for field pictures)

  257.      */

  258.     Picture new_picture;

  259.     

  260.     /** 

  261.      * copy of the current picture structure.

  262.      * note, linesize & data, might not match the current picture (for field pictures)

  263.      */

  264.     Picture current_picture;    ///< buffer to store the decompressed current picture 

  265.     

  266.     Picture *last_picture_ptr;     ///< pointer to the previous picture.

  267.     Picture *next_picture_ptr;     ///< pointer to the next picture (for bidir pred) 

  268.     Picture *new_picture_ptr;      ///< pointer to the source picture for encoding 

  269.     Picture *current_picture_ptr;  ///< pointer to the current picture

  270.     int last_dc[3];                ///< last DC values for MPEG1 

  271.     int16_t *dc_val[3];            ///< used for mpeg4 DC prediction, all 3 arrays must be continuous 

  272.     int y_dc_scale, c_dc_scale;

  273.     uint8_t *y_dc_scale_table;     ///< qscale -> y_dc_scale table 

  274.     uint8_t *c_dc_scale_table;     ///< qscale -> c_dc_scale table 

  275.     uint8_t *coded_block;          ///< used for coded block pattern prediction (msmpeg4v3, wmv1)

  276.     int16_t (*ac_val[3])[16];      ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous 

  277.     int ac_pred;

  278.     uint8_t *prev_pict_types;     ///< previous picture types in bitstream order, used for mb skip 

  279. #define PREV_PICT_TYPES_BUFFER_SIZE 256

  280.     int mb_skiped;                ///< MUST BE SET only during DECODING 

  281.     uint8_t *mbskip_table;        /**< used to avoid copy if macroblock skipped (for black regions for example) 

  282.                                    and used for b-frame encoding & decoding (contains skip table of next P Frame) */

  283.     uint8_t *mbintra_table;       ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding 

  284.     uint8_t *cbp_table;           ///< used to store cbp, ac_pred for partitioned decoding 

  285.     uint8_t *pred_dir_table;      ///< used to store pred_dir for partitioned decoding 

  286.     uint8_t *allocated_edge_emu_buffer;

  287.     uint8_t *edge_emu_buffer;     ///< points into the middle of allocated_edge_emu_buffer  

  288. 

  289.     int qscale;                 ///< QP 

  290.     float frame_qscale;         ///< qscale from the frame level rc FIXME remove

  291.     int adaptive_quant;         ///< use adaptive quantization 

  292.     int dquant;                 ///< qscale difference to prev qscale  

  293.     int pict_type;              ///< I_TYPE, P_TYPE, B_TYPE, ... 

  294.     int last_pict_type;

  295.     int last_non_b_pict_type;   ///< used for mpeg4 gmc b-frames & ratecontrol 

  296.     int frame_rate_index;

  297.     /* motion compensation */

  298.     int unrestricted_mv;        ///< mv can point outside of the coded picture 

  299.     int h263_long_vectors;      ///< use horrible h263v1 long vector mode 

  300. 

  301.     DSPContext dsp;             ///< pointers for accelerated dsp fucntions 

  302.     int f_code;                 ///< forward MV resolution 

  303.     int b_code;                 ///< backward MV resolution for B Frames (mpeg4) 

  304.     int16_t (*motion_val)[2];            ///< used for MV prediction (4MV per MB) 

  305.     int16_t (*p_mv_table)[2];            ///< MV table (1MV per MB) p-frame encoding 

  306.     int16_t (*b_forw_mv_table)[2];       ///< MV table (1MV per MB) forward mode b-frame encoding 

  307.     int16_t (*b_back_mv_table)[2];       ///< MV table (1MV per MB) backward mode b-frame encoding 

  308.     int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding 

  309.     int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding 

  310.     int16_t (*b_direct_mv_table)[2];     ///< MV table (1MV per MB) direct mode b-frame encoding 

  311.     int me_method;                       ///< ME algorithm 

  312.     int scene_change_score;

  313.     int mv_dir;

  314. #define MV_DIR_BACKWARD  1

  315. #define MV_DIR_FORWARD   2

  316. #define MV_DIRECT        4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)

  317.     int mv_type;

  318. #define MV_TYPE_16X16       0   ///< 1 vector for the whole mb 

  319. #define MV_TYPE_8X8         1   ///< 4 vectors (h263, mpeg4 4MV) 

  320. #define MV_TYPE_16X8        2   ///< 2 vectors, one per 16x8 block  

  321. #define MV_TYPE_FIELD       3   ///< 2 vectors, one per field  

  322. #define MV_TYPE_DMV         4   ///< 2 vectors, special mpeg2 Dual Prime Vectors 

  323.     /**motion vectors for a macroblock 

  324.        first coordinate : 0 = forward 1 = backward

  325.        second "         : depend on type

  326.        third  "         : 0 = x, 1 = y

  327.     */

  328.     int mv[2][4][2];

  329.     int field_select[2][2];

  330.     int last_mv[2][2][2];             ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4 

  331.     uint8_t *fcode_tab;               ///< smallest fcode needed for each MV 

  332.     

  333.     MotionEstContext me;

  334. 

  335.     int no_rounding;  /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...) 

  336.                         for b-frames rounding mode is allways 0 */

  337. 

  338.     int hurry_up;     /**< when set to 1 during decoding, b frames will be skiped

  339.                          when set to 2 idct/dequant will be skipped too */

  340.                         

  341.     /* macroblock layer */

  342.     int mb_x, mb_y;

  343.     int mb_incr;

  344.     int mb_intra;

  345.     uint8_t *mb_type;       ///< Table for MB type 

  346. #define MB_TYPE_INTRA    0x01

  347. #define MB_TYPE_INTER    0x02

  348. #define MB_TYPE_INTER4V  0x04

  349. #define MB_TYPE_SKIPED   0x08

  350. #define MB_TYPE_GMC      0x10

  351. 

  352. #define MB_TYPE_DIRECT   0x10

  353. #define MB_TYPE_FORWARD  0x20

  354. #define MB_TYPE_BACKWARD 0x40

  355. #define MB_TYPE_BIDIR    0x80

  356. 

  357.     int block_index[6]; ///< index to current MB in block based arrays with edges

  358.     int block_wrap[6];

  359. 

  360.     /** matrix transmitted in the bitstream */

  361.     uint16_t intra_matrix[64];

  362.     uint16_t chroma_intra_matrix[64];

  363.     uint16_t inter_matrix[64];

  364.     uint16_t chroma_inter_matrix[64];

  365. #define QUANT_BIAS_SHIFT 4

  366.     int intra_quant_bias;    ///< bias for the quantizer 

  367.     int inter_quant_bias;    ///< bias for the quantizer 

  368.     int min_qcoeff;          ///< minimum encodable coefficient 

  369.     int max_qcoeff;          ///< maximum encodable coefficient 

  370.     int ac_esc_length;       ///< num of bits needed to encode the longest esc 

  371.     uint8_t *intra_ac_vlc_length;

  372.     uint8_t *intra_ac_vlc_last_length;

  373.     uint8_t *inter_ac_vlc_length;

  374.     uint8_t *inter_ac_vlc_last_length;

  375.     uint8_t *luma_dc_vlc_length;

  376.     uint8_t *chroma_dc_vlc_length;

  377. #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))

  378. 

  379.     /** precomputed matrix (combine qscale and DCT renorm) */

  380.     int __align8 q_intra_matrix[32][64];

  381.     int __align8 q_inter_matrix[32][64];

  382.     /** identical to the above but for MMX & these are not permutated */

  383.     uint16_t __align8 q_intra_matrix16[32][64];

  384.     uint16_t __align8 q_inter_matrix16[32][64];

  385.     uint16_t __align8 q_intra_matrix16_bias[32][64];

  386.     uint16_t __align8 q_inter_matrix16_bias[32][64];

  387.     int block_last_index[6];  ///< last non zero coefficient in block

  388.     /* scantables */

  389.     ScanTable __align8 intra_scantable;

  390.     ScanTable intra_h_scantable;

  391.     ScanTable intra_v_scantable;

  392.     ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage

  393. 

  394.     void *opaque;              ///< private data for the user

  395. 

  396.     /* bit rate control */

  397.     int I_frame_bits; //FIXME used in mpeg12 ...

  398.     int64_t wanted_bits;

  399.     int64_t total_bits;

  400.     int frame_bits;                ///< bits used for the current frame 

  401.     RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c

  402. 

  403.     /* statistics, used for 2-pass encoding */

  404.     int mv_bits;

  405.     int header_bits;

  406.     int i_tex_bits;

  407.     int p_tex_bits;

  408.     int i_count;

  409.     int f_count;

  410.     int b_count;

  411.     int skip_count;

  412.     int misc_bits; ///< cbp, mb_type

  413.     int last_bits; ///< temp var used for calculating the above vars

  414.     

  415.     /* error concealment / resync */

  416.     uint8_t *error_status_table;       ///< table of the error status of each MB  

  417. #define VP_START            1          ///< current MB is the first after a resync marker 

  418. #define AC_ERROR            2

  419. #define DC_ERROR            4

  420. #define MV_ERROR            8

  421. #define AC_END              16

  422. #define DC_END              32

  423. #define MV_END              64

  424. //FIXME some prefix?

  425.     

  426.     int resync_mb_x;                 ///< x position of last resync marker 

  427.     int resync_mb_y;                 ///< y position of last resync marker 

  428.     GetBitContext last_resync_gb;    ///< used to search for the next resync marker 

  429.     int mb_num_left;                 ///< number of MBs left in this video packet (for partitioned Slices only)

  430.     int next_p_frame_damaged;        ///< set if the next p frame is damaged, to avoid showing trashed b frames 

  431.     int error_resilience;

  432.     

  433.     ParseContext parse_context;

  434. 

  435.     /* H.263 specific */

  436.     int gob_number;

  437.     int gob_index;

  438.         

  439.     /* H.263+ specific */

  440.     int umvplus;                    ///< == H263+ && unrestricted_mv 

  441.     int h263_aic;                   ///< Advanded INTRA Coding (AIC) 

  442.     int h263_aic_dir;               ///< AIC direction: 0 = left, 1 = top 

  443.     

  444.     /* mpeg4 specific */

  445.     int time_increment_resolution;

  446.     int time_increment_bits;        ///< number of bits to represent the fractional part of time 

  447.     int last_time_base;

  448.     int time_base;                  ///< time in seconds of last I,P,S Frame 

  449.     int64_t time;                   ///< time of current frame  

  450.     int64_t last_non_b_time;

  451.     uint16_t pp_time;               ///< time distance between the last 2 p,s,i frames 

  452.     uint16_t pb_time;               ///< time distance between the last b and p,s,i frame 

  453.     uint16_t pp_field_time;

  454.     uint16_t pb_field_time;         ///< like above, just for interlaced 

  455.     int shape;

  456.     int vol_sprite_usage;

  457.     int sprite_width;

  458.     int sprite_height;

  459.     int sprite_left;

  460.     int sprite_top;

  461.     int sprite_brightness_change;

  462.     int num_sprite_warping_points;

  463.     int real_sprite_warping_points;

  464.     int sprite_offset[2][2];         ///< sprite offset[isChroma][isMVY] 

  465.     int sprite_delta[2][2];          ///< sprite_delta [isY][isMVY]  

  466.     int sprite_shift[2];             ///< sprite shift [isChroma] 

  467.     int mcsel;

  468.     int quant_precision;

  469.     int quarter_sample;              ///< 1->qpel, 0->half pel ME/MC  

  470.     int scalability;

  471.     int hierachy_type;

  472.     int enhancement_type;

  473.     int new_pred;

  474.     int reduced_res_vop;

  475.     int aspect_ratio_info;

  476.     int aspected_width;

  477.     int aspected_height;

  478.     int sprite_warping_accuracy;

  479.     int low_latency_sprite;

  480.     int data_partitioning;           ///< data partitioning flag from header 

  481.     int partitioned_frame;           ///< is current frame partitioned 

  482.     int rvlc;                        ///< reversible vlc 

  483.     int resync_marker;               ///< could this stream contain resync markers

  484.     int low_delay;                   ///< no reordering needed / has no b-frames 

  485.     int vo_type;

  486.     int vol_control_parameters;      ///< does the stream contain the low_delay flag, used to workaround buggy encoders 

  487.     PutBitContext tex_pb;            ///< used for data partitioned VOPs 

  488.     PutBitContext pb2;               ///< used for data partitioned VOPs 

  489. #define PB_BUFFER_SIZE 1024*256

  490.     uint8_t *tex_pb_buffer;          

  491.     uint8_t *pb2_buffer;

  492.     int mpeg_quant;

  493. #define CO_LOCATED_TYPE_4MV     1

  494. #define CO_LOCATED_TYPE_FIELDMV 2

  495.     int8_t *co_located_type_table;     ///< 4mv & field_mv info for next b frame 

  496.     int16_t (*field_mv_table)[2][2];   ///< used for interlaced b frame decoding 

  497.     int8_t (*field_select_table)[2];   ///< wtf, no really another table for interlaced b frames 

  498.     int t_frame;                       ///< time distance of first I -> B, used for interlaced b frames 

  499.     int padding_bug_score;             ///< used to detect the VERY common padding bug in MPEG4 

  500. 

  501.     /* divx specific, used to workaround (many) bugs in divx5 */

  502.     int divx_version;

  503.     int divx_build;

  504. #define BITSTREAM_BUFFER_SIZE 1024*256

  505.     uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them

  506.     int bitstream_buffer_size;

  507.     

  508.     int xvid_build;

  509.     

  510.     /* lavc specific stuff, used to workaround bugs in libavcodec */

  511.     int ffmpeg_version;

  512.     int lavc_build;

  513.     

  514.     /* RV10 specific */

  515.     int rv10_version; ///< RV10 version: 0 or 3 

  516.     int rv10_first_dc_coded[3];

  517.     

  518.     /* MJPEG specific */

  519.     struct MJpegContext *mjpeg_ctx;

  520.     int mjpeg_vsample[3];       ///< vertical sampling factors, default = {2, 1, 1} 

  521.     int mjpeg_hsample[3];       ///< horizontal sampling factors, default = {2, 1, 1} 

  522.     int mjpeg_write_tables;     ///< do we want to have quantisation- and huffmantables in the jpeg file ? 

  523.     int mjpeg_data_only_frames; ///< frames only with SOI, SOS and EOI markers 

  524. 

  525.     /* MSMPEG4 specific */

  526.     int mv_table_index;

  527.     int rl_table_index;

  528.     int rl_chroma_table_index;

  529.     int dc_table_index;

  530.     int use_skip_mb_code;

  531.     int slice_height;      ///< in macroblocks 

  532.     int first_slice_line;  ///< used in mpeg4 too to handle resync markers 

  533.     int flipflop_rounding;

  534.     int msmpeg4_version;   ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8

  535.     int per_mb_rl_table;

  536.     int esc3_level_length;

  537.     int esc3_run_length;

  538.     /** [mb_intra][isChroma][level][run][last] */

  539.     int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];

  540.     int inter_intra_pred;

  541.     int mspel;

  542. 

  543.     /* decompression specific */

  544.     GetBitContext gb;

  545. 

  546.     /* Mpeg1 specific */

  547.     int fake_picture_number; ///< picture number at the bitstream frame rate 

  548.     int gop_picture_number;  ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific 

  549.     int last_mv_dir;         ///< last mv_dir, used for b frame encoding 

  550.     

  551.     /* MPEG2 specific - I wish I had not to support this mess. */

  552.     int progressive_sequence;

  553.     int mpeg_f_code[2][2];

  554.     int picture_structure;

  555. /* picture type */

  556. #define PICT_TOP_FIELD     1

  557. #define PICT_BOTTOM_FIELD  2

  558. #define PICT_FRAME         3

  559. 

  560.     int intra_dc_precision;

  561.     int frame_pred_frame_dct;

  562.     int top_field_first;

  563.     int concealment_motion_vectors;

  564.     int q_scale_type;

  565.     int intra_vlc_format;

  566.     int alternate_scan;

  567.     int repeat_first_field;

  568.     int chroma_420_type;

  569.     int progressive_frame;

  570.     int mpeg2;

  571.     int full_pel[2];

  572.     int interlaced_dct;

  573.     int first_slice;

  574.     int first_field;

  575.     

  576.     /* RTP specific */

  577.     /* These are explained on avcodec.h */

  578.     int rtp_mode;

  579.     int rtp_payload_size;

  580.     void (*rtp_callback)(void *data, int size, int packet_number);

  581.     uint8_t *ptr_lastgob;

  582.     uint8_t *ptr_last_mb_line;

  583.     uint32_t mb_line_avgsize;

  584.     

  585.     DCTELEM (*block)[64]; ///< points to one of the following blocks 

  586.     DCTELEM blocks[2][6][64] __align8; // for HQ mode we need to keep the best block

  587.     int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()

  588. #define SLICE_OK         0

  589. #define SLICE_ERROR     -1

  590. #define SLICE_END       -2 //end marker found

  591. #define SLICE_NOEND     -3 //no end marker or error found but mb count exceeded

  592.     

  593.     void (*dct_unquantize_mpeg1)(struct MpegEncContext *s, 

  594.                            DCTELEM *block/*align 16*/, int n, int qscale);

  595.     void (*dct_unquantize_mpeg2)(struct MpegEncContext *s, 

  596.                            DCTELEM *block/*align 16*/, int n, int qscale);

  597.     void (*dct_unquantize_h263)(struct MpegEncContext *s, 

  598.                            DCTELEM *block/*align 16*/, int n, int qscale);

  599.     void (*dct_unquantize)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)

  600.                            DCTELEM *block/*align 16*/, int n, int qscale);

  601.     int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);

  602.     int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);

  603. } MpegEncContext;

  604. 

  605. 

  606. int DCT_common_init(MpegEncContext *s);

  607. int MPV_common_init(MpegEncContext *s);

  608. void MPV_common_end(MpegEncContext *s);

  609. void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);

  610. int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);

  611. void MPV_frame_end(MpegEncContext *s);

  612. int MPV_encode_init(AVCodecContext *avctx);

  613. int MPV_encode_end(AVCodecContext *avctx);

  614. int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);

  615. #ifdef HAVE_MMX

  616. void MPV_common_init_mmx(MpegEncContext *s);

  617. #endif

  618. #ifdef ARCH_ALPHA

  619. void MPV_common_init_axp(MpegEncContext *s);

  620. #endif

  621. #ifdef HAVE_MLIB

  622. void MPV_common_init_mlib(MpegEncContext *s);

  623. #endif

  624. #ifdef HAVE_MMI

  625. void MPV_common_init_mmi(MpegEncContext *s);

  626. #endif

  627. #ifdef ARCH_ARMV4L

  628. void MPV_common_init_armv4l(MpegEncContext *s);

  629. #endif

  630. #ifdef ARCH_POWERPC

  631. void MPV_common_init_ppc(MpegEncContext *s);

  632. #endif

  633. extern void (*draw_edges)(uint8_t *buf, int wrap, int width, int height, int w);

  634. void ff_conceal_past_errors(MpegEncContext *s, int conceal_all);

  635. void ff_copy_bits(PutBitContext *pb, uint8_t *src, int length);

  636. void ff_clean_intra_table_entries(MpegEncContext *s);

  637. void ff_init_scantable(MpegEncContext *s, ScanTable *st, const uint8_t *src_scantable);

  638. void ff_error_resilience(MpegEncContext *s);

  639. void ff_draw_horiz_band(MpegEncContext *s, int y, int h);

  640. void ff_emulated_edge_mc(MpegEncContext *s, uint8_t *src, int linesize, int block_w, int block_h, 

  641.                                     int src_x, int src_y, int w, int h);

  642. char ff_get_pict_type_char(int pict_type);

  643. int ff_combine_frame( MpegEncContext *s, int next, uint8_t **buf, int *buf_size);

  644. 

  645. extern enum PixelFormat ff_yuv420p_list[2];

  646. 

  647. static inline void ff_init_block_index(MpegEncContext *s){

  648.     s->block_index[0]= s->block_wrap[0]*(s->mb_y*2 + 1) - 1 + s->mb_x*2;

  649.     s->block_index[1]= s->block_wrap[0]*(s->mb_y*2 + 1)     + s->mb_x*2;

  650.     s->block_index[2]= s->block_wrap[0]*(s->mb_y*2 + 2) - 1 + s->mb_x*2;

  651.     s->block_index[3]= s->block_wrap[0]*(s->mb_y*2 + 2)     + s->mb_x*2;

  652.     s->block_index[4]= s->block_wrap[4]*(s->mb_y + 1)                    + s->block_wrap[0]*(s->mb_height*2 + 2) + s->mb_x;

  653.     s->block_index[5]= s->block_wrap[4]*(s->mb_y + 1 + s->mb_height + 2) + s->block_wrap[0]*(s->mb_height*2 + 2) + s->mb_x;

  654. }

  655. 

  656. static inline void ff_update_block_index(MpegEncContext *s){

  657.     s->block_index[0]+=2;

  658.     s->block_index[1]+=2;

  659.     s->block_index[2]+=2;

  660.     s->block_index[3]+=2;

  661.     s->block_index[4]++;

  662.     s->block_index[5]++;

  663. }

  664. 

  665. 

  666. /* motion_est.c */

  667. void ff_estimate_p_frame_motion(MpegEncContext * s,

  668.                              int mb_x, int mb_y);

  669. void ff_estimate_b_frame_motion(MpegEncContext * s,

  670.                              int mb_x, int mb_y);

  671. int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);

  672. void ff_fix_long_p_mvs(MpegEncContext * s);

  673. void ff_fix_long_b_mvs(MpegEncContext * s, int16_t (*mv_table)[2], int f_code, int type);

  674. void ff_init_me(MpegEncContext *s);

  675. int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);

  676. 

  677. 

  678. /* mpeg12.c */

  679. extern const int16_t ff_mpeg1_default_intra_matrix[64];

  680. extern const int16_t ff_mpeg1_default_non_intra_matrix[64];

  681. extern uint8_t ff_mpeg1_dc_scale_table[128];

  682. 

  683. void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);

  684. void mpeg1_encode_mb(MpegEncContext *s,

  685.                      DCTELEM block[6][64],

  686.                      int motion_x, int motion_y);

  687. void ff_mpeg1_encode_init(MpegEncContext *s);

  688. 

  689. 

  690. /** RLTable. */

  691. typedef struct RLTable {

  692.     int n;                         ///< number of entries of table_vlc minus 1 

  693.     int last;                      ///< number of values for last = 0 

  694.     const uint16_t (*table_vlc)[2];

  695.     const int8_t *table_run;

  696.     const int8_t *table_level;

  697.     uint8_t *index_run[2];         ///< encoding only 

  698.     int8_t *max_level[2];          ///< encoding & decoding 

  699.     int8_t *max_run[2];            ///< encoding & decoding 

  700.     VLC vlc;                       ///< decoding only deprected FIXME remove

  701.     RL_VLC_ELEM *rl_vlc[32];       ///< decoding only 

  702. } RLTable;

  703. 

  704. void init_rl(RLTable *rl);

  705. void init_vlc_rl(RLTable *rl);

  706. 

  707. static inline int get_rl_index(const RLTable *rl, int last, int run, int level)

  708. {

  709.     int index;

  710.     index = rl->index_run[last][run];

  711.     if (index >= rl->n)

  712.         return rl->n;

  713.     if (level > rl->max_level[last][run])

  714.         return rl->n;

  715.     return index + level - 1;

  716. }

  717. 

  718. extern uint8_t ff_mpeg4_y_dc_scale_table[32];

  719. extern uint8_t ff_mpeg4_c_dc_scale_table[32];

  720. extern const int16_t ff_mpeg4_default_intra_matrix[64];

  721. extern const int16_t ff_mpeg4_default_non_intra_matrix[64];

  722. int ff_h263_decode_init(AVCodecContext *avctx);

  723. int ff_h263_decode_frame(AVCodecContext *avctx, 

  724.                              void *data, int *data_size,

  725.                              uint8_t *buf, int buf_size);

  726. int ff_h263_decode_end(AVCodecContext *avctx);

  727. void h263_encode_mb(MpegEncContext *s, 

  728.                     DCTELEM block[6][64],

  729.                     int motion_x, int motion_y);

  730. void mpeg4_encode_mb(MpegEncContext *s, 

  731.                     DCTELEM block[6][64],

  732.                     int motion_x, int motion_y);

  733. void h263_encode_picture_header(MpegEncContext *s, int picture_number);

  734. int h263_encode_gob_header(MpegEncContext * s, int mb_line);

  735. int16_t *h263_pred_motion(MpegEncContext * s, int block, 

  736.                         int *px, int *py);

  737. void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n, 

  738.                    int dir);

  739. void ff_set_mpeg4_time(MpegEncContext * s, int picture_number);

  740. void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);

  741. void h263_encode_init(MpegEncContext *s);

  742. void h263_decode_init_vlc(MpegEncContext *s);

  743. int h263_decode_picture_header(MpegEncContext *s);

  744. int ff_h263_decode_gob_header(MpegEncContext *s);

  745. int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);

  746. 

  747. 

  748. int intel_h263_decode_picture_header(MpegEncContext *s);

  749. int ff_h263_decode_mb(MpegEncContext *s,

  750.                       DCTELEM block[6][64]);

  751. int h263_get_picture_format(int width, int height);

  752. void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);

  753. void ff_mpeg4_clean_buffers(MpegEncContext *s);

  754. void ff_mpeg4_stuffing(PutBitContext * pbc);

  755. void ff_mpeg4_init_partitions(MpegEncContext *s);

  756. void ff_mpeg4_merge_partitions(MpegEncContext *s);

  757. void ff_clean_mpeg4_qscales(MpegEncContext *s);

  758. void ff_clean_h263_qscales(MpegEncContext *s);

  759. int ff_mpeg4_decode_partitions(MpegEncContext *s);

  760. int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);

  761. int ff_h263_resync(MpegEncContext *s);

  762. int ff_h263_get_gob_height(MpegEncContext *s);

  763. void ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);

  764. inline int ff_h263_round_chroma(int x);

  765. 

  766. 

  767. /* rv10.c */

  768. void rv10_encode_picture_header(MpegEncContext *s, int picture_number);

  769. int rv_decode_dc(MpegEncContext *s, int n);

  770. 

  771. 

  772. /* msmpeg4.c */

  773. void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);

  774. void msmpeg4_encode_ext_header(MpegEncContext * s);

  775. void msmpeg4_encode_mb(MpegEncContext * s, 

  776.                        DCTELEM block[6][64],

  777.                        int motion_x, int motion_y);

  778. int msmpeg4_decode_picture_header(MpegEncContext * s);

  779. int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);

  780. int ff_msmpeg4_decode_init(MpegEncContext *s);

  781. void ff_msmpeg4_encode_init(MpegEncContext *s);

  782. int ff_wmv2_decode_picture_header(MpegEncContext * s);

  783. void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);

  784. void ff_mspel_motion(MpegEncContext *s,

  785.                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

  786.                                uint8_t **ref_picture, op_pixels_func (*pix_op)[4],

  787.                                int motion_x, int motion_y, int h);

  788. int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);

  789. void ff_wmv2_encode_mb(MpegEncContext * s, 

  790.                        DCTELEM block[6][64],

  791.                        int motion_x, int motion_y);

  792. 

  793. /* mjpegenc.c */

  794. int mjpeg_init(MpegEncContext *s);

  795. void mjpeg_close(MpegEncContext *s);

  796. void mjpeg_encode_mb(MpegEncContext *s, 

  797.                      DCTELEM block[6][64]);

  798. void mjpeg_picture_header(MpegEncContext *s);

  799. void mjpeg_picture_trailer(MpegEncContext *s);

  800. 

  801. 

  802. /* rate control */

  803. int ff_rate_control_init(MpegEncContext *s);

  804. float ff_rate_estimate_qscale(MpegEncContext *s);

  805. void ff_write_pass1_stats(MpegEncContext *s);

  806. void ff_rate_control_uninit(MpegEncContext *s);

  807. double ff_eval(char *s, double *const_value, const char **const_name,

  808.                double (**func1)(void *, double), const char **func1_name,

  809.                double (**func2)(void *, double, double), char **func2_name,

  810.                void *opaque);

  811. 

  812. 

  813. #endif /* AVCODEC_MPEGVIDEO_H */