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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.  * Copyright (c) 2002-2004 Michael Niedermayer

  5.  *

  6.  * This file is part of Libav.

  7.  *

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

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

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

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

  12.  *

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

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

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

  16.  * Lesser General Public License for more details.

  17.  *

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

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

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

  21.  */

  22. 

  23. /**

  24.  * @file

  25.  * mpegvideo header.

  26.  */

  27. 

  28. #ifndef AVCODEC_MPEGVIDEO_H

  29. #define AVCODEC_MPEGVIDEO_H

  30. 

  31. #include <float.h>

  32. 

  33. #include "avcodec.h"

  34. #include "bitstream.h"

  35. #include "blockdsp.h"

  36. #include "error_resilience.h"

  37. #include "fdctdsp.h"

  38. #include "get_bits.h"

  39. #include "h263dsp.h"

  40. #include "hpeldsp.h"

  41. #include "idctdsp.h"

  42. #include "internal.h"

  43. #include "me_cmp.h"

  44. #include "motion_est.h"

  45. #include "mpegpicture.h"

  46. #include "mpegvideodsp.h"

  47. #include "mpegvideoencdsp.h"

  48. #include "pixblockdsp.h"

  49. #include "put_bits.h"

  50. #include "ratecontrol.h"

  51. #include "parser.h"

  52. #include "mpegutils.h"

  53. #include "mpeg12data.h"

  54. #include "qpeldsp.h"

  55. #include "thread.h"

  56. #include "videodsp.h"

  57. 

  58. #include "libavutil/opt.h"

  59. 

  60. #define MAX_THREADS 16

  61. 

  62. #define MAX_B_FRAMES 16

  63. 

  64. /* Start codes. */

  65. #define SEQ_END_CODE            0x000001b7

  66. #define SEQ_START_CODE          0x000001b3

  67. #define GOP_START_CODE          0x000001b8

  68. #define PICTURE_START_CODE      0x00000100

  69. #define SLICE_MIN_START_CODE    0x00000101

  70. #define SLICE_MAX_START_CODE    0x000001af

  71. #define EXT_START_CODE          0x000001b5

  72. #define USER_START_CODE         0x000001b2

  73. 

  74. /**

  75.  * MpegEncContext.

  76.  */

  77. typedef struct MpegEncContext {

  78.     AVClass *class;

  79. 

  80.     int y_dc_scale, c_dc_scale;

  81.     int ac_pred;

  82.     int block_last_index[12];  ///< last non zero coefficient in block

  83.     int h263_aic;              ///< Advanced INTRA Coding (AIC)

  84. 

  85.     /* scantables */

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

  87.     ScanTable intra_scantable;

  88.     ScanTable intra_h_scantable;

  89.     ScanTable intra_v_scantable;

  90. 

  91.     /* WARNING: changes above this line require updates to hardcoded

  92.      *          offsets used in ASM. */

  93. 

  94.     struct AVCodecContext *avctx;

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

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

  97.     int gop_size;

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

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

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

  101.     int h263_pred;    ///< use MPEG-4/H.263 ac/dc predictions

  102.     int pb_frame;     ///< PB-frame mode (0 = none, 1 = base, 2 = improved)

  103. 

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

  105.     int h263_plus;    ///< H.263+ headers

  106.     int h263_flv;     ///< use flv H.263 header

  107. 

  108.     enum AVCodecID codec_id;     /* see AV_CODEC_ID_xxx */

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

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

  111.     int max_b_frames; ///< max number of B-frames for encoding

  112.     int luma_elim_threshold;

  113.     int chroma_elim_threshold;

  114.     int strict_std_compliance; ///< strictly follow the std (MPEG-4, ...)

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

  116.     int codec_tag;             ///< internal codec_tag upper case converted from avctx codec_tag

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

  118. 

  119.     /* sequence parameters */

  120.     int context_initialized;

  121.     int input_picture_number;  ///< used to set pic->display_picture_number, should not be used for/by anything else

  122.     int coded_picture_number;  ///< used to set pic->coded_picture_number, should not be used for/by anything else

  123.     int picture_number;       //FIXME remove, unclear definition

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

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

  126.     int mb_stride;             ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11

  127.     int b8_stride;             ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing

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

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

  130.     ptrdiff_t linesize;        ///< line size, in bytes, may be different from width

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

  132.     Picture *picture;          ///< main picture buffer

  133.     Picture **input_picture;   ///< next pictures on display order for encoding

  134.     Picture **reordered_input_picture; ///< pointer to the next pictures in coded order for encoding

  135. 

  136.     int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_encode_video2()

  137.     /**

  138.      * pts difference between the first and second input frame, used for

  139.      * calculating dts of the first frame when there's a delay */

  140.     int64_t dts_delta;

  141.     /**

  142.      * reordered pts to be used as dts for the next output frame when there's

  143.      * a delay */

  144.     int64_t reordered_pts;

  145. 

  146.     /** bit output */

  147.     PutBitContext pb;

  148. 

  149.     int start_mb_y;            ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)

  150.     int end_mb_y;              ///< end   mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)

  151.     struct MpegEncContext *thread_context[MAX_THREADS];

  152.     int slice_context_count;   ///< number of used thread_contexts

  153. 

  154.     /**

  155.      * copy of the previous picture structure.

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

  157.      */

  158.     Picture last_picture;

  159. 

  160.     /**

  161.      * copy of the next picture structure.

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

  163.      */

  164.     Picture next_picture;

  165. 

  166.     /**

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

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

  169.      */

  170.     Picture new_picture;

  171. 

  172.     /**

  173.      * copy of the current picture structure.

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

  175.      */

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

  177. 

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

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

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

  181.     int last_dc[3];                ///< last DC values for MPEG-1

  182.     int16_t *dc_val_base;

  183.     int16_t *dc_val[3];            ///< used for MPEG-4 DC prediction, all 3 arrays must be continuous

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

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

  186.     const uint8_t *chroma_qscale_table;  ///< qscale -> chroma_qscale (H.263)

  187.     uint8_t *coded_block_base;

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

  189.     int16_t (*ac_val_base)[16];

  190.     int16_t (*ac_val[3])[16];      ///< used for for MPEG-4 AC prediction, all 3 arrays must be continuous

  191.     int mb_skipped;                ///< MUST BE SET only during DECODING

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

  193.                                    and used for B-frame encoding & decoding (contains skip table of next P-frame) */

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

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

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

  197. 

  198.     ScratchpadContext sc;

  199. 

  200.     int qscale;                 ///< QP

  201.     int chroma_qscale;          ///< chroma QP

  202.     unsigned int lambda;        ///< Lagrange multiplier used in rate distortion

  203.     unsigned int lambda2;       ///< (lambda*lambda) >> FF_LAMBDA_SHIFT

  204.     int *lambda_table;

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

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

  207.     int pict_type;              ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...

  208.     int last_pict_type; //FIXME removes

  209.     int last_non_b_pict_type;   ///< used for MPEG-4 gmc B-frames & ratecontrol

  210.     int droppable;

  211.     int frame_rate_index;

  212.     int last_lambda_for[5];     ///< last lambda for a specific pict type

  213.     int skipdct;                ///< skip dct and code zero residual

  214. 

  215.     /* motion compensation */

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

  217.     int h263_long_vectors;      ///< use horrible H.263v1 long vector mode

  218. 

  219.     BlockDSPContext bdsp;

  220.     FDCTDSPContext fdsp;

  221.     HpelDSPContext hdsp;

  222.     IDCTDSPContext idsp;

  223.     MECmpContext mecc;

  224.     MpegVideoDSPContext mdsp;

  225.     MpegvideoEncDSPContext mpvencdsp;

  226.     PixblockDSPContext pdsp;

  227.     QpelDSPContext qdsp;

  228.     VideoDSPContext vdsp;

  229.     H263DSPContext h263dsp;

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

  231.     int b_code;                 ///< backward MV resolution for B-frames (MPEG-4)

  232.     int16_t (*p_mv_table_base)[2];

  233.     int16_t (*b_forw_mv_table_base)[2];

  234.     int16_t (*b_back_mv_table_base)[2];

  235.     int16_t (*b_bidir_forw_mv_table_base)[2];

  236.     int16_t (*b_bidir_back_mv_table_base)[2];

  237.     int16_t (*b_direct_mv_table_base)[2];

  238.     int16_t (*p_field_mv_table_base[2][2])[2];

  239.     int16_t (*b_field_mv_table_base[2][2][2])[2];

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

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

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

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

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

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

  246.     int16_t (*p_field_mv_table[2][2])[2];   ///< MV table (2MV per MB) interlaced P-frame encoding

  247.     int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced B-frame encoding

  248.     uint8_t (*p_field_select_table[2]);

  249.     uint8_t (*b_field_select_table[2][2]);

  250.     int motion_est;                      ///< ME algorithm

  251.     int me_penalty_compensation;

  252.     int me_pre;                          ///< prepass for motion estimation

  253.     int mv_dir;

  254. #define MV_DIR_FORWARD   1

  255. #define MV_DIR_BACKWARD  2

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

  257.     int mv_type;

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

  259. #define MV_TYPE_8X8         1   ///< 4 vectors (H.263, MPEG-4 4MV)

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

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

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

  263.     /**motion vectors for a macroblock

  264.        first coordinate : 0 = forward 1 = backward

  265.        second "         : depend on type

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

  267.     */

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

  269.     int field_select[2][2];

  270.     int last_mv[2][2][2];             ///< last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4

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

  272.     int16_t direct_scale_mv[2][64];   ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv

  273. 

  274.     MotionEstContext me;

  275. 

  276.     int no_rounding;  /**< apply no rounding to motion compensation (MPEG-4, msmpeg4, ...)

  277.                         for B-frames rounding mode is always 0 */

  278. 

  279.     /* macroblock layer */

  280.     int mb_x, mb_y;

  281.     int mb_skip_run;

  282.     int mb_intra;

  283.     uint16_t *mb_type;  ///< Table for candidate MB types for encoding (defines in mpegutils.h)

  284. 

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

  286.     int block_wrap[6];

  287.     uint8_t *dest[3];

  288. 

  289.     int *mb_index2xy;        ///< mb_index -> mb_x + mb_y*mb_stride

  290. 

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

  292.     uint16_t intra_matrix[64];

  293.     uint16_t chroma_intra_matrix[64];

  294.     uint16_t inter_matrix[64];

  295.     uint16_t chroma_inter_matrix[64];

  296. 

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

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

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

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

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

  302.     uint8_t *intra_ac_vlc_length;

  303.     uint8_t *intra_ac_vlc_last_length;

  304.     uint8_t *inter_ac_vlc_length;

  305.     uint8_t *inter_ac_vlc_last_length;

  306.     uint8_t *luma_dc_vlc_length;

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

  308. 

  309.     int coded_score[8];

  310. 

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

  312.     int (*q_intra_matrix)[64];

  313.     int (*q_inter_matrix)[64];

  314.     /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/

  315.     uint16_t (*q_intra_matrix16)[2][64];

  316.     uint16_t (*q_inter_matrix16)[2][64];

  317. 

  318.     /* noise reduction */

  319.     int (*dct_error_sum)[64];

  320.     int dct_count[2];

  321.     uint16_t (*dct_offset)[64];

  322. 

  323.     /* bit rate control */

  324.     int64_t total_bits;

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

  326.     int next_lambda;               ///< next lambda used for retrying to encode a frame

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

  328. 

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

  330.     int mv_bits;

  331.     int header_bits;

  332.     int i_tex_bits;

  333.     int p_tex_bits;

  334.     int i_count;

  335.     int f_count;

  336.     int b_count;

  337.     int skip_count;

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

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

  340. 

  341.     /* error concealment / resync */

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

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

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

  345.     BitstreamContext last_resync_bc; ///< used to search for the next resync marker

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

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

  348. 

  349.     ParseContext parse_context;

  350. 

  351.     /* H.263 specific */

  352.     int gob_index;

  353.     int obmc;                       ///< overlapped block motion compensation

  354.     int mb_info;                    ///< interval for outputting info about mb offsets as side data

  355.     int prev_mb_info, last_mb_info;

  356.     uint8_t *mb_info_ptr;

  357.     int mb_info_size;

  358. 

  359.     /* H.263+ specific */

  360.     int umvplus;                    ///< == H.263+ && unrestricted_mv

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

  362.     int h263_slice_structured;

  363.     int alt_inter_vlc;              ///< alternative inter vlc

  364.     int modified_quant;

  365.     int loop_filter;

  366.     int custom_pcf;

  367. 

  368.     /* MPEG-4 specific */

  369.     ///< number of bits to represent the fractional part of time (encoder only)

  370.     int time_increment_bits;

  371.     int last_time_base;

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

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

  374.     int64_t last_non_b_time;

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

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

  377.     uint16_t pp_field_time;

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

  379.     int real_sprite_warping_points;

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

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

  382.     int mcsel;

  383.     int quant_precision;

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

  385.     int aspect_ratio_info; //FIXME remove

  386.     int sprite_warping_accuracy;

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

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

  389.     int low_delay;                   ///< no reordering needed / has no B-frames

  390.     int vo_type;

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

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

  393.     int mpeg_quant;

  394.     int padding_bug_score;             ///< used to detect the VERY common padding bug in MPEG-4

  395. 

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

  397.     int divx_packed;

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

  399.     int bitstream_buffer_size;

  400.     unsigned int allocated_bitstream_buffer_size;

  401. 

  402.     /* RV10 specific */

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

  404.     int rv10_first_dc_coded[3];

  405. 

  406.     /* MJPEG specific */

  407.     struct MJpegContext *mjpeg_ctx;

  408.     int pred;

  409. 

  410.     /* MSMPEG4 specific */

  411.     int mv_table_index;

  412.     int rl_table_index;

  413.     int rl_chroma_table_index;

  414.     int dc_table_index;

  415.     int use_skip_mb_code;

  416.     int slice_height;      ///< in macroblocks

  417.     int first_slice_line;  ///< used in MPEG-4 too to handle resync markers

  418.     int flipflop_rounding;

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

  420.     int per_mb_rl_table;

  421.     int esc3_level_length;

  422.     int esc3_run_length;

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

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

  425.     int inter_intra_pred;

  426.     int mspel;

  427. 

  428.     /* decompression specific */

  429.     GetBitContext gb;

  430.     BitstreamContext bc;

  431. 

  432.     /* MPEG-1 specific */

  433.     int gop_picture_number;  ///< index of the first picture of a GOP based on fake_pic_num & MPEG-1 specific

  434.     int last_mv_dir;         ///< last mv_dir, used for B-frame encoding

  435.     uint8_t *vbv_delay_ptr;  ///< pointer to vbv_delay in the bitstream

  436. 

  437.     /* MPEG-2-specific - I wished not to have to support this mess. */

  438.     int progressive_sequence;

  439.     int mpeg_f_code[2][2];

  440. 

  441.     // picture structure defines are loaded from mpegutils.h

  442.     int picture_structure;

  443. 

  444.     int64_t timecode_frame_start; ///< GOP timecode frame start number, in non drop frame format

  445.     int intra_dc_precision;

  446.     int frame_pred_frame_dct;

  447.     int top_field_first;

  448.     int concealment_motion_vectors;

  449.     int q_scale_type;

  450.     int brd_scale;

  451.     int intra_vlc_format;

  452.     int alternate_scan;

  453.     int repeat_first_field;

  454.     int chroma_420_type;

  455.     int chroma_format;

  456. #define CHROMA_420 1

  457. #define CHROMA_422 2

  458.     int chroma_x_shift;//depend on pix_format, that depend on chroma_format

  459.     int chroma_y_shift;

  460. 

  461.     int progressive_frame;

  462.     int full_pel[2];

  463.     int interlaced_dct;

  464.     int first_field;         ///< is 1 for the first field of a field picture 0 otherwise

  465.     int drop_frame_timecode; ///< timecode is in drop frame format.

  466.     int scan_offset;         ///< reserve space for SVCD scan offset user data.

  467. 

  468.     /* RTP specific */

  469.     int rtp_mode;

  470.     int rtp_payload_size;

  471. 

  472.     uint8_t *ptr_lastgob;

  473.     int16_t (*pblocks[12])[64];

  474. 

  475.     int16_t (*block)[64]; ///< points to one of the following blocks

  476.     int16_t (*blocks)[12][64]; // for HQ mode we need to keep the best block

  477.     int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()

  478. #define SLICE_OK         0

  479. #define SLICE_ERROR     -1

  480. #define SLICE_END       -2 ///<end marker found

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

  482. 

  483.     void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,

  484.                            int16_t *block/*align 16*/, int n, int qscale);

  485.     void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,

  486.                            int16_t *block/*align 16*/, int n, int qscale);

  487.     void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,

  488.                            int16_t *block/*align 16*/, int n, int qscale);

  489.     void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,

  490.                            int16_t *block/*align 16*/, int n, int qscale);

  491.     void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,

  492.                            int16_t *block/*align 16*/, int n, int qscale);

  493.     void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,

  494.                            int16_t *block/*align 16*/, int n, int qscale);

  495.     void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both)

  496.                            int16_t *block/*align 16*/, int n, int qscale);

  497.     void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both)

  498.                            int16_t *block/*align 16*/, int n, int qscale);

  499.     int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);

  500.     int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);

  501.     void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);

  502. 

  503.     int mpv_flags;      ///< flags set by private options

  504.     int quantizer_noise_shaping;

  505. 

  506.     /**

  507.      * ratecontrol qmin qmax limiting method

  508.      * 0-> clipping, 1-> use a nice continuous function to limit qscale within qmin/qmax.

  509.      */

  510.     float rc_qsquish;

  511.     float rc_qmod_amp;

  512.     int   rc_qmod_freq;

  513.     float rc_initial_cplx;

  514.     float rc_buffer_aggressivity;

  515.     float border_masking;

  516.     int lmin, lmax;

  517. 

  518.     char *rc_eq;

  519. 

  520.     /* temp buffers for rate control */

  521.     float *cplx_tab, *bits_tab;

  522. 

  523.     /* flag to indicate a reinitialization is required, e.g. after

  524.      * a frame size change */

  525.     int context_reinit;

  526. 

  527.     ERContext er;

  528. 

  529.     int error_rate;

  530. 

  531.     /* temporary frames used by b_frame_strategy = 2 */

  532.     AVFrame *tmp_frames[MAX_B_FRAMES + 2];

  533.     int b_frame_strategy;

  534.     int b_sensitivity;

  535. 

  536.     /* frame skip options for encoding */

  537.     int frame_skip_threshold;

  538.     int frame_skip_factor;

  539.     int frame_skip_exp;

  540.     int frame_skip_cmp;

  541. 

  542.     int scenechange_threshold;

  543.     int noise_reduction;

  544. } MpegEncContext;

  545. 

  546. /* mpegvideo_enc common options */

  547. #define FF_MPV_FLAG_SKIP_RD      0x0001

  548. #define FF_MPV_FLAG_STRICT_GOP   0x0002

  549. #define FF_MPV_FLAG_QP_RD        0x0004

  550. #define FF_MPV_FLAG_CBP_RD       0x0008

  551. #define FF_MPV_FLAG_NAQ          0x0010

  552. #define FF_MPV_FLAG_MV0          0x0020

  553. 

  554. #define FF_MPV_OPT_CMP_FUNC \

  555. { "sad",    "Sum of absolute differences, fast", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_SAD }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \

  556. { "sse",    "Sum of squared errors", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_SSE }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \

  557. { "satd",   "Sum of absolute Hadamard transformed differences", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_SATD }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \

  558. { "dct",    "Sum of absolute DCT transformed differences", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_DCT }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \

  559. { "psnr",   "Sum of squared quantization errors, low quality", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_PSNR }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \

  560. { "bit",    "Number of bits needed for the block", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_BIT }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \

  561. { "rd",     "Rate distortion optimal, slow", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_RD }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \

  562. { "zero",   "Zero", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_ZERO }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \

  563. { "vsad",   "Sum of absolute vertical differences", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_VSAD }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \

  564. { "vsse",   "Sum of squared vertical differences", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_VSSE }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \

  565. { "nsse",   "Noise preserving sum of squared differences", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_NSSE }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \

  566. { "dct264", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_DCT264 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \

  567. { "dctmax", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_DCTMAX }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \

  568. { "chroma", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_CHROMA }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }

  569. 

  570. #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)

  571. #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)

  572. #define FF_MPV_COMMON_OPTS \

  573. FF_MPV_OPT_CMP_FUNC, \

  574. { "mpv_flags",      "Flags common for all mpegvideo-based encoders.", FF_MPV_OFFSET(mpv_flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "mpv_flags" },\

  575. { "skip_rd",        "RD optimal MB level residual skipping", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_SKIP_RD },    0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\

  576. { "strict_gop",     "Strictly enforce gop size",             0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_STRICT_GOP }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\

  577. { "qp_rd",          "Use rate distortion optimization for qp selection", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_QP_RD },  0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\

  578. { "cbp_rd",         "use rate distortion optimization for CBP",          0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_CBP_RD }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\

  579. { "naq",            "normalize adaptive quantization",                   0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_NAQ },    0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\

  580. { "mv0",            "always try a mb with mv=<0,0>",                     0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_MV0 },    0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\

  581. { "luma_elim_threshold",   "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\

  582.                                                                       FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\

  583. { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\

  584.                                                                       FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\

  585. { "quantizer_noise_shaping", NULL,                                  FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 },       0, INT_MAX, FF_MPV_OPT_FLAGS },\

  586. { "error_rate", "Simulate errors in the bitstream to test error concealment.",                                                                                                  \

  587.                                                                     FF_MPV_OFFSET(error_rate),              AV_OPT_TYPE_INT, { .i64 = 0 },       0, INT_MAX, FF_MPV_OPT_FLAGS },\

  588. {"qsquish", "how to keep quantizer between qmin and qmax (0 = clip, 1 = use differentiable function)",                                                                          \

  589.                                                                     FF_MPV_OFFSET(rc_qsquish), AV_OPT_TYPE_FLOAT, {.dbl = 0 }, 0, 99, FF_MPV_OPT_FLAGS},                        \

  590. {"rc_qmod_amp", "experimental quantizer modulation",                FF_MPV_OFFSET(rc_qmod_amp), AV_OPT_TYPE_FLOAT, {.dbl = 0 }, -FLT_MAX, FLT_MAX, FF_MPV_OPT_FLAGS},           \

  591. {"rc_qmod_freq", "experimental quantizer modulation",               FF_MPV_OFFSET(rc_qmod_freq), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS},             \

  592. {"rc_eq", "Set rate control equation. When computing the expression, besides the standard functions "                                                                           \

  593.           "defined in the section 'Expression Evaluation', the following functions are available: "                                                                             \

  594.           "bits2qp(bits), qp2bits(qp). Also the following constants are available: iTex pTex tex mv "                                                                           \

  595.           "fCode iCount mcVar var isI isP isB avgQP qComp avgIITex avgPITex avgPPTex avgBPTex avgTex.",                                                                         \

  596.                                                                     FF_MPV_OFFSET(rc_eq), AV_OPT_TYPE_STRING,                           .flags = FF_MPV_OPT_FLAGS },            \

  597. {"rc_init_cplx", "initial complexity for 1-pass encoding",          FF_MPV_OFFSET(rc_initial_cplx), AV_OPT_TYPE_FLOAT, {.dbl = 0 }, -FLT_MAX, FLT_MAX, FF_MPV_OPT_FLAGS},       \

  598. {"rc_buf_aggressivity", "currently useless",                        FF_MPV_OFFSET(rc_buffer_aggressivity), AV_OPT_TYPE_FLOAT, {.dbl = 1.0 }, -FLT_MAX, FLT_MAX, FF_MPV_OPT_FLAGS}, \

  599. {"border_mask", "increase the quantizer for macroblocks close to borders", FF_MPV_OFFSET(border_masking), AV_OPT_TYPE_FLOAT, {.dbl = 0 }, -FLT_MAX, FLT_MAX, FF_MPV_OPT_FLAGS},    \

  600. {"lmin", "minimum Lagrange factor (VBR)",                           FF_MPV_OFFSET(lmin), AV_OPT_TYPE_INT, {.i64 =  2*FF_QP2LAMBDA }, 0, INT_MAX, FF_MPV_OPT_FLAGS },            \

  601. {"lmax", "maximum Lagrange factor (VBR)",                           FF_MPV_OFFSET(lmax), AV_OPT_TYPE_INT, {.i64 = 31*FF_QP2LAMBDA }, 0, INT_MAX, FF_MPV_OPT_FLAGS },            \

  602. {"ibias", "intra quant bias",                                       FF_MPV_OFFSET(intra_quant_bias), AV_OPT_TYPE_INT, {.i64 = FF_DEFAULT_QUANT_BIAS }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },   \

  603. {"pbias", "inter quant bias",                                       FF_MPV_OFFSET(inter_quant_bias), AV_OPT_TYPE_INT, {.i64 = FF_DEFAULT_QUANT_BIAS }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },   \

  604. {"motion_est", "motion estimation algorithm",                       FF_MPV_OFFSET(motion_est), AV_OPT_TYPE_INT, {.i64 = FF_ME_EPZS }, FF_ME_ZERO, FF_ME_XONE, FF_MPV_OPT_FLAGS, "motion_est" }, \

  605. { "zero", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_ZERO }, 0, 0, FF_MPV_OPT_FLAGS, "motion_est" }, \

  606. { "epzs", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_EPZS }, 0, 0, FF_MPV_OPT_FLAGS, "motion_est" }, \

  607. { "xone", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_XONE }, 0, 0, FF_MPV_OPT_FLAGS, "motion_est" }, \

  608. {"b_strategy", "Strategy to choose between I/P/B-frames",           FF_MPV_OFFSET(b_frame_strategy), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 2, FF_MPV_OPT_FLAGS }, \

  609. {"b_sensitivity", "Adjust sensitivity of b_frame_strategy 1",       FF_MPV_OFFSET(b_sensitivity), AV_OPT_TYPE_INT, {.i64 = 40 }, 1, INT_MAX, FF_MPV_OPT_FLAGS }, \

  610. {"brd_scale", "Downscale frames for dynamic B-frame decision",      FF_MPV_OFFSET(brd_scale), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 3, FF_MPV_OPT_FLAGS }, \

  611. {"skip_threshold", "Frame skip threshold",                          FF_MPV_OFFSET(frame_skip_threshold), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \

  612. {"skip_factor", "Frame skip factor",                                FF_MPV_OFFSET(frame_skip_factor), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \

  613. {"skip_exp", "Frame skip exponent",                                 FF_MPV_OFFSET(frame_skip_exp), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \

  614. {"skip_cmp", "Frame skip compare function",                         FF_MPV_OFFSET(frame_skip_cmp), AV_OPT_TYPE_INT, {.i64 = FF_CMP_DCTMAX }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \

  615. {"sc_threshold", "Scene change threshold",                          FF_MPV_OFFSET(scenechange_threshold), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \

  616. {"noise_reduction", "Noise reduction",                              FF_MPV_OFFSET(noise_reduction), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \

  617. {"mpeg_quant", "Use MPEG quantizers instead of H.263",              FF_MPV_OFFSET(mpeg_quant), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FF_MPV_OPT_FLAGS }, \

  618. {"ps", "RTP payload size in bytes",                             FF_MPV_OFFSET(rtp_payload_size), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \

  619. {"mepc", "Motion estimation bitrate penalty compensation (1.0 = 256)", FF_MPV_OFFSET(me_penalty_compensation), AV_OPT_TYPE_INT, {.i64 = 256 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \

  620. {"mepre", "pre motion estimation", FF_MPV_OFFSET(me_pre), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \

  621. 

  622. extern const AVOption ff_mpv_generic_options[];

  623. 

  624. /**

  625.  * Set the given MpegEncContext to common defaults (same for encoding

  626.  * and decoding).  The changed fields will not depend upon the prior

  627.  * state of the MpegEncContext.

  628.  */

  629. void ff_mpv_common_defaults(MpegEncContext *s);

  630. 

  631. int ff_mpv_common_init(MpegEncContext *s);

  632. void ff_mpv_common_init_arm(MpegEncContext *s);

  633. void ff_mpv_common_init_neon(MpegEncContext *s);

  634. void ff_mpv_common_init_ppc(MpegEncContext *s);

  635. void ff_mpv_common_init_x86(MpegEncContext *s);

  636. 

  637. int ff_mpv_common_frame_size_change(MpegEncContext *s);

  638. void ff_mpv_common_end(MpegEncContext *s);

  639. 

  640. void ff_mpv_decode_defaults(MpegEncContext *s);

  641. void ff_mpv_decode_mb(MpegEncContext *s, int16_t block[12][64]);

  642. void ff_mpv_report_decode_progress(MpegEncContext *s);

  643. 

  644. int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx);

  645. void ff_mpv_frame_end(MpegEncContext *s);

  646. 

  647. int ff_mpv_encode_init(AVCodecContext *avctx);

  648. void ff_mpv_encode_init_x86(MpegEncContext *s);

  649. 

  650. int ff_mpv_encode_end(AVCodecContext *avctx);

  651. int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,

  652.                           const AVFrame *frame, int *got_packet);

  653. 

  654. void ff_clean_intra_table_entries(MpegEncContext *s);

  655. void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);

  656. void ff_mpeg_flush(AVCodecContext *avctx);

  657. void ff_print_debug_info(MpegEncContext *s, Picture *p);

  658. void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);

  659. 

  660. int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);

  661. int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);

  662. void ff_set_qscale(MpegEncContext * s, int qscale);

  663. 

  664. void ff_mpv_idct_init(MpegEncContext *s);

  665. void ff_convert_matrix(MpegEncContext *s, int (*qmat)[64], uint16_t (*qmat16)[2][64],

  666.                        const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);

  667. int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);

  668. 

  669. void ff_init_block_index(MpegEncContext *s);

  670. 

  671. void ff_mpv_motion(MpegEncContext *s,

  672.                    uint8_t *dest_y, uint8_t *dest_cb,

  673.                    uint8_t *dest_cr, int dir,

  674.                    uint8_t **ref_picture,

  675.                    op_pixels_func (*pix_op)[4],

  676.                    qpel_mc_func (*qpix_op)[16]);

  677. 

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

  679.     const int block_size = 8;

  680. 

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

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

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

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

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

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

  687.     s->dest[0]+= 2*block_size;

  688.     s->dest[1]+= block_size;

  689.     s->dest[2]+= block_size;

  690. }

  691. 

  692. static inline int get_bits_diff(MpegEncContext *s){

  693.     const int bits= put_bits_count(&s->pb);

  694.     const int last= s->last_bits;

  695. 

  696.     s->last_bits = bits;

  697. 

  698.     return bits - last;

  699. }

  700. 

  701. #endif /* AVCODEC_MPEGVIDEO_H */