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ffmpeg / libavcodec / mpegvideo.h @ 0da71265

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/*
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 * Generic DCT based hybrid video encoder
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 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 */
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/**
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 * @file mpegvideo.h
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 * mpegvideo header.
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 */
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#ifndef AVCODEC_MPEGVIDEO_H
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#define AVCODEC_MPEGVIDEO_H
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#include "dsputil.h"
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#define FRAME_SKIPED 100 ///< return value for header parsers if frame is not coded
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enum OutputFormat {
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    FMT_MPEG1,
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    FMT_H263,
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    FMT_MJPEG, 
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    FMT_H264,
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};
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#define EDGE_WIDTH 16
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#define MPEG_BUF_SIZE (16 * 1024)
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#define QMAT_SHIFT_MMX 16
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#define QMAT_SHIFT 22
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#define MAX_FCODE 7
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#define MAX_MV 2048
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#define MAX_PICTURE_COUNT 15
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#define ME_MAP_SIZE 64
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#define ME_MAP_SHIFT 3
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#define ME_MAP_MV_BITS 11
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/* run length table */
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#define MAX_RUN    64
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#define MAX_LEVEL  64
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#define I_TYPE FF_I_TYPE  ///< Intra
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#define P_TYPE FF_P_TYPE  ///< Predicted
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#define B_TYPE FF_B_TYPE  ///< Bi-dir predicted
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#define S_TYPE FF_S_TYPE  ///< S(GMC)-VOP MPEG4
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#define SI_TYPE FF_SI_TYPE  ///< Switching Intra
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#define SP_TYPE FF_SP_TYPE  ///< Switching Predicted
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typedef struct Predictor{
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    double coeff;
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    double count;
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    double decay;
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} Predictor;
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typedef struct RateControlEntry{
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    int pict_type;
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    float qscale;
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    int mv_bits;
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    int i_tex_bits;
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    int p_tex_bits;
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    int misc_bits;
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    uint64_t expected_bits;
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    int new_pict_type;
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    float new_qscale;
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    int mc_mb_var_sum;
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    int mb_var_sum;
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    int i_count;
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    int f_code;
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    int b_code;
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}RateControlEntry;
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/**
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 * rate control context.
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 */
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typedef struct RateControlContext{
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    FILE *stats_file;
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    int num_entries;              ///< number of RateControlEntries 
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    RateControlEntry *entry;
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    int buffer_index;             ///< amount of bits in the video/audio buffer 
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    Predictor pred[5];
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    double short_term_qsum;       ///< sum of recent qscales 
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    double short_term_qcount;     ///< count of recent qscales 
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    double pass1_rc_eq_output_sum;///< sum of the output of the rc equation, this is used for normalization  
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    double pass1_wanted_bits;     ///< bits which should have been outputed by the pass1 code (including complexity init) 
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    double last_qscale;
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    double last_qscale_for[5];    ///< last qscale for a specific pict type, used for max_diff & ipb factor stuff 
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    int last_mc_mb_var_sum;
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    int last_mb_var_sum;
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    uint64_t i_cplx_sum[5];
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    uint64_t p_cplx_sum[5];
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    uint64_t mv_bits_sum[5];
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    uint64_t qscale_sum[5];
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    int frame_count[5];
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    int last_non_b_pict_type;
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}RateControlContext;
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/**
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 * Scantable.
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 */
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typedef struct ScanTable{
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    const uint8_t *scantable;
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    uint8_t permutated[64];
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    uint8_t raster_end[64];
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#ifdef ARCH_POWERPC
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                /** Used by dct_quantise_alitvec to find last-non-zero */
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    uint8_t __align8 inverse[64];
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#endif
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} ScanTable;
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/**
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 * Picture.
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 */
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typedef struct Picture{
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    FF_COMMON_FRAME
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    /**
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     * halfpel luma planes.
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     */
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    uint8_t *interpolated[3];
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    int16_t (*motion_val[2])[2];
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    int8_t *ref_index[2];
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    uint16_t *mb_type_base;
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    uint16_t *mb_type;           ///< mb_type_base + mb_width + 2
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#define MB_TYPE_INTRA4x4   0x0001
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#define MB_TYPE_INTRA16x16 0x0002
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#define MB_TYPE_INTRA_PCM  0x0004
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#define MB_TYPE_16x16      0x0008
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#define MB_TYPE_16x8       0x0010
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#define MB_TYPE_8x16       0x0020
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#define MB_TYPE_8x8        0x0040
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#define MB_TYPE_INTERLACED 0x0080
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#define MB_TYPE_DIRECT2     0x0100 //FIXME
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#define MB_TYPE_REF0       0x0200
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#define MB_TYPE_GMC2        0x0400 //FIXME
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#define MB_TYPE_P0L0       0x1000
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#define MB_TYPE_P1L0       0x2000
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#define MB_TYPE_P0L1       0x4000
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#define MB_TYPE_P1L1       0x8000
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#define IS_INTRA4x4(a)   ((a)&MB_TYPE_INTRA4x4)
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#define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
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#define IS_INTRA(a)      ((a)&3)
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#define IS_INTER(a)      ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
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#define IS_INTRA_PCM(a)  ((a)&MB_TYPE_INTRA_PCM)
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#define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
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#define IS_DIRECT(a)     ((a)&MB_TYPE_DIRECT2)
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#define IS_16X16(a)      ((a)&MB_TYPE_16x16)
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#define IS_16X8(a)       ((a)&MB_TYPE_16x8)
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#define IS_8X16(a)       ((a)&MB_TYPE_8x16)
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#define IS_8X8(a)        ((a)&MB_TYPE_8x8)
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#define IS_SUB_8X8(a)    ((a)&MB_TYPE_16x16) //note reused
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#define IS_SUB_8X4(a)    ((a)&MB_TYPE_16x8)  //note reused
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#define IS_SUB_4X8(a)    ((a)&MB_TYPE_8x16)  //note reused
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#define IS_SUB_4X4(a)    ((a)&MB_TYPE_8x8)   //note reused
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#define IS_REF0(a)       ((a)&MB_TYPE_REF0)
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#define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
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#define USES_LIST(a, list) ((a) & ((MB_TYPE_P0L0|MB_TYPE_P1L0)<<(2*(list)))) ///< does this mb use listX, note doesnt work if subMBs
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    int field_poc[2];           ///< h264 top/bottom POC
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    int poc;                    ///< h264 frame POC
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    int frame_num;              ///< h264 frame_num
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    int pic_id;                 ///< h264 pic_num or long_term_pic_idx
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    int long_ref;               ///< 1->long term reference 0->short term reference
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    int mb_var_sum;             ///< sum of MB variance for current frame 
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    int mc_mb_var_sum;          ///< motion compensated MB variance for current frame 
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    uint16_t *mb_var;           ///< Table for MB variances 
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    uint16_t *mc_mb_var;        ///< Table for motion compensated MB variances 
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    uint8_t *mb_mean;           ///< Table for MB luminance 
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    int32_t *mb_cmp_score;        ///< Table for MB cmp scores, for mb decission 
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    int b_frame_score;          /* */
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} Picture;
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typedef struct ParseContext{
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    uint8_t *buffer;
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    int index;
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    int last_index;
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    int buffer_size;
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    int state;
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    int frame_start_found;
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} ParseContext;
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struct MpegEncContext;
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/**
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 * Motion estimation context.
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 */
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typedef struct MotionEstContext{
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    int skip;                          ///< set if ME is skiped for the current MB 
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    int co_located_mv[4][2];           ///< mv from last p frame for direct mode ME 
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    int direct_basis_mv[4][2];
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    uint8_t *scratchpad;               ///< data area for the me algo, so that the ME doesnt need to malloc/free 
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    uint32_t *map;                     ///< map to avoid duplicate evaluations 
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    uint32_t *score_map;               ///< map to store the scores 
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    int map_generation;  
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    int pre_penalty_factor;
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    int penalty_factor;
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    int sub_penalty_factor;
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    int mb_penalty_factor;
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    int pre_pass;                      ///< = 1 for the pre pass 
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    int dia_size;
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    uint8_t (*mv_penalty)[MAX_MV*2+1];  ///< amount of bits needed to encode a MV 
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    int (*sub_motion_search)(struct MpegEncContext * s,
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                                  int *mx_ptr, int *my_ptr, int dmin,
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                                  int xmin, int ymin, int xmax, int ymax,
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                                  int pred_x, int pred_y, Picture *ref_picture, 
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                                  int n, int size, uint8_t * const mv_penalty);
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    int (*motion_search[7])(struct MpegEncContext * s, int block,
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                             int *mx_ptr, int *my_ptr,
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                             int P[10][2], int pred_x, int pred_y,
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                             int xmin, int ymin, int xmax, int ymax, Picture *ref_picture, int16_t (*last_mv)[2], 
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                             int ref_mv_scale, uint8_t * const mv_penalty);
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    int (*pre_motion_search)(struct MpegEncContext * s, int block,
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                             int *mx_ptr, int *my_ptr,
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                             int P[10][2], int pred_x, int pred_y,
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                             int xmin, int ymin, int xmax, int ymax, Picture *ref_picture, int16_t (*last_mv)[2], 
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                             int ref_mv_scale, uint8_t * const mv_penalty);
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    int (*get_mb_score)(struct MpegEncContext * s, int mx, int my, int pred_x, int pred_y, Picture *ref_picture, 
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                                  uint8_t * const mv_penalty);
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}MotionEstContext;
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/**
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 * MpegEncContext.
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 */
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typedef struct MpegEncContext {
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    struct AVCodecContext *avctx;
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    /* the following parameters must be initialized before encoding */
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    int width, height;///< picture size. must be a multiple of 16 
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    int gop_size;
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    int intra_only;   ///< if true, only intra pictures are generated 
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    int bit_rate;     ///< wanted bit rate 
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    int bit_rate_tolerance; ///< amount of +- bits (>0)
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    enum OutputFormat out_format; ///< output format 
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    int h263_pred;    ///< use mpeg4/h263 ac/dc predictions 
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/* the following codec id fields are deprecated in favor of codec_id */
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    int h263_plus;    ///< h263 plus headers 
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    int h263_rv10;    ///< use RV10 variation for H263 
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    int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
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    int h263_intel;   ///< use I263 intel h263 header 
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    int codec_id;     /* see CODEC_ID_xxx */
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    int fixed_qscale; ///< fixed qscale if non zero 
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    float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0) 
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    float qblur;      ///< amount of qscale smoothing over time (0.0-1.0) 
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    int max_qdiff;    ///< max qscale difference between frames 
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    int encoding;     ///< true if we are encoding (vs decoding) 
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    int flags;        ///< AVCodecContext.flags (HQ, MV4, ...) 
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    int max_b_frames; ///< max number of b-frames for encoding 
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    int b_frame_strategy;
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    int luma_elim_threshold;
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    int chroma_elim_threshold;
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    int strict_std_compliance; ///< strictly follow the std (MPEG4, ...) 
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    int workaround_bugs;       ///< workaround bugs in encoders which cannot be detected automatically 
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    /* the following fields are managed internally by the encoder */
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    /** bit output */
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    PutBitContext pb;
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    /* sequence parameters */
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    int context_initialized;
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    int input_picture_number;
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    int picture_number;
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    int picture_in_gop_number; ///< 0-> first pic in gop, ... 
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    int b_frames_since_non_b;  ///< used for encoding, relative to not yet reordered input 
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    int mb_width, mb_height;   ///< number of MBs horizontally & vertically 
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    int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replicateion)
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    int mb_num;                ///< number of MBs of a picture 
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    int linesize;              ///< line size, in bytes, may be different from width 
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    int uvlinesize;            ///< line size, for chroma in bytes, may be different from width 
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    Picture picture[MAX_PICTURE_COUNT]; ///< main picture buffer 
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    Picture *input_picture[MAX_PICTURE_COUNT]; ///< next pictures on display order for encoding
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    Picture *reordered_input_picture[MAX_PICTURE_COUNT]; ///< pointer to the next pictures in codedorder for encoding
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    /** 
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     * copy of the previous picture structure.
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     * note, linesize & data, might not match the previous picture (for field pictures)
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     */
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    Picture last_picture;       
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    /** 
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     * copy of the next picture structure.
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     * note, linesize & data, might not match the next picture (for field pictures)
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     */
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    Picture next_picture;
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    /** 
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     * copy of the source picture structure for encoding.
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     * note, linesize & data, might not match the source picture (for field pictures)
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     */
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    Picture new_picture;
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    /** 
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     * copy of the current picture structure.
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     * note, linesize & data, might not match the current picture (for field pictures)
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     */
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    Picture current_picture;    ///< buffer to store the decompressed current picture 
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    Picture *last_picture_ptr;     ///< pointer to the previous picture.
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    Picture *next_picture_ptr;     ///< pointer to the next picture (for bidir pred) 
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    Picture *new_picture_ptr;      ///< pointer to the source picture for encoding 
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    Picture *current_picture_ptr;  ///< pointer to the current picture
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    int last_dc[3];                ///< last DC values for MPEG1 
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    int16_t *dc_val[3];            ///< used for mpeg4 DC prediction, all 3 arrays must be continuous 
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    int16_t dc_cache[4*5];
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    int y_dc_scale, c_dc_scale;
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    uint8_t *y_dc_scale_table;     ///< qscale -> y_dc_scale table 
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    uint8_t *c_dc_scale_table;     ///< qscale -> c_dc_scale table 
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    uint8_t *coded_block;          ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
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    int16_t (*ac_val[3])[16];      ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous 
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    int ac_pred;
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    uint8_t *prev_pict_types;     ///< previous picture types in bitstream order, used for mb skip 
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#define PREV_PICT_TYPES_BUFFER_SIZE 256
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    int mb_skiped;                ///< MUST BE SET only during DECODING 
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    uint8_t *mbskip_table;        /**< used to avoid copy if macroblock skipped (for black regions for example) 
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                                   and used for b-frame encoding & decoding (contains skip table of next P Frame) */
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    uint8_t *mbintra_table;       ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding 
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    uint8_t *cbp_table;           ///< used to store cbp, ac_pred for partitioned decoding 
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    uint8_t *pred_dir_table;      ///< used to store pred_dir for partitioned decoding 
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    uint8_t *allocated_edge_emu_buffer;
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    uint8_t *edge_emu_buffer;     ///< points into the middle of allocated_edge_emu_buffer  
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    int qscale;                 ///< QP 
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    float frame_qscale;         ///< qscale from the frame level rc FIXME remove
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    int adaptive_quant;         ///< use adaptive quantization 
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    int dquant;                 ///< qscale difference to prev qscale  
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    int pict_type;              ///< I_TYPE, P_TYPE, B_TYPE, ... 
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    int last_pict_type;
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    int last_non_b_pict_type;   ///< used for mpeg4 gmc b-frames & ratecontrol 
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    int frame_rate_index;
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    /* motion compensation */
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    int unrestricted_mv;        ///< mv can point outside of the coded picture 
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    int h263_long_vectors;      ///< use horrible h263v1 long vector mode 
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    int decode;                 ///< if 0 then decoding will be skiped (for encoding b frames for example)
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    DSPContext dsp;             ///< pointers for accelerated dsp fucntions 
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    int f_code;                 ///< forward MV resolution 
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    int b_code;                 ///< backward MV resolution for B Frames (mpeg4) 
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    int16_t (*motion_val)[2];            ///< used for MV prediction (4MV per MB) 
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    int16_t (*p_mv_table)[2];            ///< MV table (1MV per MB) p-frame encoding 
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    int16_t (*b_forw_mv_table)[2];       ///< MV table (1MV per MB) forward mode b-frame encoding 
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    int16_t (*b_back_mv_table)[2];       ///< MV table (1MV per MB) backward mode b-frame encoding 
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    int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding 
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    int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding 
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    int16_t (*b_direct_mv_table)[2];     ///< MV table (1MV per MB) direct mode b-frame encoding 
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    int me_method;                       ///< ME algorithm 
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    int scene_change_score;
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    int mv_dir;
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#define MV_DIR_BACKWARD  1
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#define MV_DIR_FORWARD   2
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#define MV_DIRECT        4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
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    int mv_type;
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#define MV_TYPE_16X16       0   ///< 1 vector for the whole mb 
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#define MV_TYPE_8X8         1   ///< 4 vectors (h263, mpeg4 4MV) 
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#define MV_TYPE_16X8        2   ///< 2 vectors, one per 16x8 block  
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#define MV_TYPE_FIELD       3   ///< 2 vectors, one per field  
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#define MV_TYPE_DMV         4   ///< 2 vectors, special mpeg2 Dual Prime Vectors 
377
    /**motion vectors for a macroblock 
378
       first coordinate : 0 = forward 1 = backward
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       second "         : depend on type
380
       third  "         : 0 = x, 1 = y
381
    */
382
    int mv[2][4][2];
383
    int field_select[2][2];
384
    int last_mv[2][2][2];             ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4 
385
    uint8_t *fcode_tab;               ///< smallest fcode needed for each MV 
386
    
387
    MotionEstContext me;
388

    
389
    int no_rounding;  /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...) 
390
                        for b-frames rounding mode is allways 0 */
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392
    int hurry_up;     /**< when set to 1 during decoding, b frames will be skiped
393
                         when set to 2 idct/dequant will be skipped too */
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395
    /* macroblock layer */
396
    int mb_x, mb_y;
397
    int mb_skip_run;
398
    int mb_intra;
399
    uint8_t *mb_type;       ///< Table for MB type 
400
#define MB_TYPE_INTRA    0x01
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#define MB_TYPE_INTER    0x02
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#define MB_TYPE_INTER4V  0x04
403
#define MB_TYPE_SKIPED   0x08
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#define MB_TYPE_GMC      0x10
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406
#define MB_TYPE_DIRECT   0x10
407
#define MB_TYPE_FORWARD  0x20
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#define MB_TYPE_BACKWARD 0x40
409
#define MB_TYPE_BIDIR    0x80
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411
    int block_index[6]; ///< index to current MB in block based arrays with edges
412
    int block_wrap[6];
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414
    /** matrix transmitted in the bitstream */
415
    uint16_t intra_matrix[64];
416
    uint16_t chroma_intra_matrix[64];
417
    uint16_t inter_matrix[64];
418
    uint16_t chroma_inter_matrix[64];
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#define QUANT_BIAS_SHIFT 8
420
    int intra_quant_bias;    ///< bias for the quantizer 
421
    int inter_quant_bias;    ///< bias for the quantizer 
422
    int min_qcoeff;          ///< minimum encodable coefficient 
423
    int max_qcoeff;          ///< maximum encodable coefficient 
424
    int ac_esc_length;       ///< num of bits needed to encode the longest esc 
425
    uint8_t *intra_ac_vlc_length;
426
    uint8_t *intra_ac_vlc_last_length;
427
    uint8_t *inter_ac_vlc_length;
428
    uint8_t *inter_ac_vlc_last_length;
429
    uint8_t *luma_dc_vlc_length;
430
    uint8_t *chroma_dc_vlc_length;
431
#define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
432

    
433
    /** precomputed matrix (combine qscale and DCT renorm) */
434
    int __align8 q_intra_matrix[32][64];
435
    int __align8 q_inter_matrix[32][64];
436
    /** identical to the above but for MMX & these are not permutated */
437
    uint16_t __align8 q_intra_matrix16[32][64];
438
    uint16_t __align8 q_inter_matrix16[32][64];
439
    uint16_t __align8 q_intra_matrix16_bias[32][64];
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    uint16_t __align8 q_inter_matrix16_bias[32][64];
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    int block_last_index[6];  ///< last non zero coefficient in block
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    /* scantables */
443
    ScanTable __align8 intra_scantable;
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    ScanTable intra_h_scantable;
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    ScanTable intra_v_scantable;
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    ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
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448
    void *opaque;              ///< private data for the user
449

    
450
    /* bit rate control */
451
    int I_frame_bits; //FIXME used in mpeg12 ...
452
    int64_t wanted_bits;
453
    int64_t total_bits;
454
    int frame_bits;                ///< bits used for the current frame 
455
    RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
456

    
457
    /* statistics, used for 2-pass encoding */
458
    int mv_bits;
459
    int header_bits;
460
    int i_tex_bits;
461
    int p_tex_bits;
462
    int i_count;
463
    int f_count;
464
    int b_count;
465
    int skip_count;
466
    int misc_bits; ///< cbp, mb_type
467
    int last_bits; ///< temp var used for calculating the above vars
468
    
469
    /* error concealment / resync */
470
    uint8_t *error_status_table;       ///< table of the error status of each MB  
471
#define VP_START            1          ///< current MB is the first after a resync marker 
472
#define AC_ERROR            2
473
#define DC_ERROR            4
474
#define MV_ERROR            8
475
#define AC_END              16
476
#define DC_END              32
477
#define MV_END              64
478
//FIXME some prefix?
479
    
480
    int resync_mb_x;                 ///< x position of last resync marker 
481
    int resync_mb_y;                 ///< y position of last resync marker 
482
    GetBitContext last_resync_gb;    ///< used to search for the next resync marker 
483
    int mb_num_left;                 ///< number of MBs left in this video packet (for partitioned Slices only)
484
    int next_p_frame_damaged;        ///< set if the next p frame is damaged, to avoid showing trashed b frames 
485
    int error_resilience;
486
    
487
    ParseContext parse_context;
488

    
489
    /* H.263 specific */
490
    int gob_number;
491
    int gob_index;
492
        
493
    /* H.263+ specific */
494
    int umvplus;                    ///< == H263+ && unrestricted_mv 
495
    int h263_aic;                   ///< Advanded INTRA Coding (AIC) 
496
    int h263_aic_dir;               ///< AIC direction: 0 = left, 1 = top 
497
    
498
    /* mpeg4 specific */
499
    int time_increment_resolution;
500
    int time_increment_bits;        ///< number of bits to represent the fractional part of time 
501
    int last_time_base;
502
    int time_base;                  ///< time in seconds of last I,P,S Frame 
503
    int64_t time;                   ///< time of current frame  
504
    int64_t last_non_b_time;
505
    uint16_t pp_time;               ///< time distance between the last 2 p,s,i frames 
506
    uint16_t pb_time;               ///< time distance between the last b and p,s,i frame 
507
    uint16_t pp_field_time;
508
    uint16_t pb_field_time;         ///< like above, just for interlaced 
509
    int shape;
510
    int vol_sprite_usage;
511
    int sprite_width;
512
    int sprite_height;
513
    int sprite_left;
514
    int sprite_top;
515
    int sprite_brightness_change;
516
    int num_sprite_warping_points;
517
    int real_sprite_warping_points;
518
    int sprite_offset[2][2];         ///< sprite offset[isChroma][isMVY] 
519
    int sprite_delta[2][2];          ///< sprite_delta [isY][isMVY]  
520
    int sprite_shift[2];             ///< sprite shift [isChroma] 
521
    int mcsel;
522
    int quant_precision;
523
    int quarter_sample;              ///< 1->qpel, 0->half pel ME/MC  
524
    int scalability;
525
    int hierachy_type;
526
    int enhancement_type;
527
    int new_pred;
528
    int reduced_res_vop;
529
    int aspect_ratio_info; //FIXME remove
530
    int aspected_width;    //FIXME remove
531
    int aspected_height;   //FIXME remove
532
    int sprite_warping_accuracy;
533
    int low_latency_sprite;
534
    int data_partitioning;           ///< data partitioning flag from header 
535
    int partitioned_frame;           ///< is current frame partitioned 
536
    int rvlc;                        ///< reversible vlc 
537
    int resync_marker;               ///< could this stream contain resync markers
538
    int low_delay;                   ///< no reordering needed / has no b-frames 
539
    int vo_type;
540
    int vol_control_parameters;      ///< does the stream contain the low_delay flag, used to workaround buggy encoders 
541
    PutBitContext tex_pb;            ///< used for data partitioned VOPs 
542
    PutBitContext pb2;               ///< used for data partitioned VOPs 
543
#define PB_BUFFER_SIZE 1024*256
544
    uint8_t *tex_pb_buffer;          
545
    uint8_t *pb2_buffer;
546
    int mpeg_quant;
547
#define CO_LOCATED_TYPE_4MV     1
548
#define CO_LOCATED_TYPE_FIELDMV 2
549
    int8_t *co_located_type_table;     ///< 4mv & field_mv info for next b frame 
550
    int16_t (*field_mv_table)[2][2];   ///< used for interlaced b frame decoding 
551
    int8_t (*field_select_table)[2];   ///< wtf, no really another table for interlaced b frames 
552
    int t_frame;                       ///< time distance of first I -> B, used for interlaced b frames 
553
    int padding_bug_score;             ///< used to detect the VERY common padding bug in MPEG4 
554

    
555
    /* divx specific, used to workaround (many) bugs in divx5 */
556
    int divx_version;
557
    int divx_build;
558
    int divx_packed;
559
#define BITSTREAM_BUFFER_SIZE 1024*256
560
    uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
561
    int bitstream_buffer_size;
562
    
563
    int xvid_build;
564
    
565
    /* lavc specific stuff, used to workaround bugs in libavcodec */
566
    int ffmpeg_version;
567
    int lavc_build;
568
    
569
    /* RV10 specific */
570
    int rv10_version; ///< RV10 version: 0 or 3 
571
    int rv10_first_dc_coded[3];
572
    
573
    /* MJPEG specific */
574
    struct MJpegContext *mjpeg_ctx;
575
    int mjpeg_vsample[3];       ///< vertical sampling factors, default = {2, 1, 1} 
576
    int mjpeg_hsample[3];       ///< horizontal sampling factors, default = {2, 1, 1} 
577
    int mjpeg_write_tables;     ///< do we want to have quantisation- and huffmantables in the jpeg file ? 
578
    int mjpeg_data_only_frames; ///< frames only with SOI, SOS and EOI markers 
579

    
580
    /* MSMPEG4 specific */
581
    int mv_table_index;
582
    int rl_table_index;
583
    int rl_chroma_table_index;
584
    int dc_table_index;
585
    int use_skip_mb_code;
586
    int slice_height;      ///< in macroblocks 
587
    int first_slice_line;  ///< used in mpeg4 too to handle resync markers 
588
    int flipflop_rounding;
589
    int msmpeg4_version;   ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
590
    int per_mb_rl_table;
591
    int esc3_level_length;
592
    int esc3_run_length;
593
    /** [mb_intra][isChroma][level][run][last] */
594
    int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
595
    int inter_intra_pred;
596
    int mspel;
597

    
598
    /* decompression specific */
599
    GetBitContext gb;
600

    
601
    /* Mpeg1 specific */
602
    int fake_picture_number; ///< picture number at the bitstream frame rate 
603
    int gop_picture_number;  ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific 
604
    int last_mv_dir;         ///< last mv_dir, used for b frame encoding 
605
    int broken_link;         ///< no_output_of_prior_pics_flag
606
    
607
    /* MPEG2 specific - I wish I had not to support this mess. */
608
    int progressive_sequence;
609
    int mpeg_f_code[2][2];
610
    int picture_structure;
611
/* picture type */
612
#define PICT_TOP_FIELD     1
613
#define PICT_BOTTOM_FIELD  2
614
#define PICT_FRAME         3
615

    
616
    int intra_dc_precision;
617
    int frame_pred_frame_dct;
618
    int top_field_first;
619
    int concealment_motion_vectors;
620
    int q_scale_type;
621
    int intra_vlc_format;
622
    int alternate_scan;
623
    int repeat_first_field;
624
    int chroma_420_type;
625
    int progressive_frame;
626
    int mpeg2;
627
    int full_pel[2];
628
    int interlaced_dct;
629
    int first_slice;
630
    int first_field;
631
    
632
    /* RTP specific */
633
    /* These are explained on avcodec.h */
634
    int rtp_mode;
635
    int rtp_payload_size;
636
    void (*rtp_callback)(void *data, int size, int packet_number);
637
    uint8_t *ptr_lastgob;
638
    
639
    DCTELEM (*block)[64]; ///< points to one of the following blocks 
640
    DCTELEM blocks[2][6][64] __align8; // for HQ mode we need to keep the best block
641
    int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
642
#define SLICE_OK         0
643
#define SLICE_ERROR     -1
644
#define SLICE_END       -2 //end marker found
645
#define SLICE_NOEND     -3 //no end marker or error found but mb count exceeded
646
    
647
    void (*dct_unquantize_mpeg1)(struct MpegEncContext *s, 
648
                           DCTELEM *block/*align 16*/, int n, int qscale);
649
    void (*dct_unquantize_mpeg2)(struct MpegEncContext *s, 
650
                           DCTELEM *block/*align 16*/, int n, int qscale);
651
    void (*dct_unquantize_h263)(struct MpegEncContext *s, 
652
                           DCTELEM *block/*align 16*/, int n, int qscale);
653
    void (*dct_unquantize)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
654
                           DCTELEM *block/*align 16*/, int n, int qscale);
655
    int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
656
    int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
657
} MpegEncContext;
658

    
659

    
660
int DCT_common_init(MpegEncContext *s);
661
int MPV_common_init(MpegEncContext *s);
662
void MPV_common_end(MpegEncContext *s);
663
void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);
664
int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
665
void MPV_frame_end(MpegEncContext *s);
666
int MPV_encode_init(AVCodecContext *avctx);
667
int MPV_encode_end(AVCodecContext *avctx);
668
int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
669
#ifdef HAVE_MMX
670
void MPV_common_init_mmx(MpegEncContext *s);
671
#endif
672
#ifdef ARCH_ALPHA
673
void MPV_common_init_axp(MpegEncContext *s);
674
#endif
675
#ifdef HAVE_MLIB
676
void MPV_common_init_mlib(MpegEncContext *s);
677
#endif
678
#ifdef HAVE_MMI
679
void MPV_common_init_mmi(MpegEncContext *s);
680
#endif
681
#ifdef ARCH_ARMV4L
682
void MPV_common_init_armv4l(MpegEncContext *s);
683
#endif
684
#ifdef ARCH_POWERPC
685
void MPV_common_init_ppc(MpegEncContext *s);
686
#endif
687
extern void (*draw_edges)(uint8_t *buf, int wrap, int width, int height, int w);
688
void ff_copy_bits(PutBitContext *pb, uint8_t *src, int length);
689
void ff_clean_intra_table_entries(MpegEncContext *s);
690
void ff_init_scantable(MpegEncContext *s, ScanTable *st, const uint8_t *src_scantable);
691
void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
692
void ff_emulated_edge_mc(MpegEncContext *s, uint8_t *src, int linesize, int block_w, int block_h, 
693
                                    int src_x, int src_y, int w, int h);
694
char ff_get_pict_type_char(int pict_type);
695
int ff_combine_frame( MpegEncContext *s, int next, uint8_t **buf, int *buf_size);
696

    
697
void ff_er_frame_start(MpegEncContext *s);
698
void ff_er_frame_end(MpegEncContext *s);
699
void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
700

    
701

    
702
extern enum PixelFormat ff_yuv420p_list[2];
703

    
704
static inline void ff_init_block_index(MpegEncContext *s){
705
    s->block_index[0]= s->block_wrap[0]*(s->mb_y*2 + 1) - 1 + s->mb_x*2;
706
    s->block_index[1]= s->block_wrap[0]*(s->mb_y*2 + 1)     + s->mb_x*2;
707
    s->block_index[2]= s->block_wrap[0]*(s->mb_y*2 + 2) - 1 + s->mb_x*2;
708
    s->block_index[3]= s->block_wrap[0]*(s->mb_y*2 + 2)     + s->mb_x*2;
709
    s->block_index[4]= s->block_wrap[4]*(s->mb_y + 1)                    + s->block_wrap[0]*(s->mb_height*2 + 2) + s->mb_x;
710
    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;
711
}
712

    
713
static inline void ff_update_block_index(MpegEncContext *s){
714
    s->block_index[0]+=2;
715
    s->block_index[1]+=2;
716
    s->block_index[2]+=2;
717
    s->block_index[3]+=2;
718
    s->block_index[4]++;
719
    s->block_index[5]++;
720
}
721

    
722
static inline int get_bits_diff(MpegEncContext *s){
723
    const int bits= get_bit_count(&s->pb);
724
    const int last= s->last_bits;
725

    
726
    s->last_bits = bits;
727

    
728
    return bits - last;
729
}
730

    
731
/* motion_est.c */
732
void ff_estimate_p_frame_motion(MpegEncContext * s,
733
                             int mb_x, int mb_y);
734
void ff_estimate_b_frame_motion(MpegEncContext * s,
735
                             int mb_x, int mb_y);
736
int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
737
void ff_fix_long_p_mvs(MpegEncContext * s);
738
void ff_fix_long_b_mvs(MpegEncContext * s, int16_t (*mv_table)[2], int f_code, int type);
739
void ff_init_me(MpegEncContext *s);
740
int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
741

    
742

    
743
/* mpeg12.c */
744
extern const int16_t ff_mpeg1_default_intra_matrix[64];
745
extern const int16_t ff_mpeg1_default_non_intra_matrix[64];
746
extern uint8_t ff_mpeg1_dc_scale_table[128];
747

    
748
void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
749
void mpeg1_encode_mb(MpegEncContext *s,
750
                     DCTELEM block[6][64],
751
                     int motion_x, int motion_y);
752
void ff_mpeg1_encode_init(MpegEncContext *s);
753
void ff_mpeg1_encode_slice_header(MpegEncContext *s);
754
void ff_mpeg1_clean_buffers(MpegEncContext *s);
755

    
756

    
757
/** RLTable. */
758
typedef struct RLTable {
759
    int n;                         ///< number of entries of table_vlc minus 1 
760
    int last;                      ///< number of values for last = 0 
761
    const uint16_t (*table_vlc)[2];
762
    const int8_t *table_run;
763
    const int8_t *table_level;
764
    uint8_t *index_run[2];         ///< encoding only 
765
    int8_t *max_level[2];          ///< encoding & decoding 
766
    int8_t *max_run[2];            ///< encoding & decoding 
767
    VLC vlc;                       ///< decoding only deprected FIXME remove
768
    RL_VLC_ELEM *rl_vlc[32];       ///< decoding only 
769
} RLTable;
770

    
771
void init_rl(RLTable *rl);
772
void init_vlc_rl(RLTable *rl);
773

    
774
static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
775
{
776
    int index;
777
    index = rl->index_run[last][run];
778
    if (index >= rl->n)
779
        return rl->n;
780
    if (level > rl->max_level[last][run])
781
        return rl->n;
782
    return index + level - 1;
783
}
784

    
785
extern uint8_t ff_mpeg4_y_dc_scale_table[32];
786
extern uint8_t ff_mpeg4_c_dc_scale_table[32];
787
extern const int16_t ff_mpeg4_default_intra_matrix[64];
788
extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
789
int ff_h263_decode_init(AVCodecContext *avctx);
790
int ff_h263_decode_frame(AVCodecContext *avctx, 
791
                             void *data, int *data_size,
792
                             uint8_t *buf, int buf_size);
793
int ff_h263_decode_end(AVCodecContext *avctx);
794
void h263_encode_mb(MpegEncContext *s, 
795
                    DCTELEM block[6][64],
796
                    int motion_x, int motion_y);
797
void mpeg4_encode_mb(MpegEncContext *s, 
798
                    DCTELEM block[6][64],
799
                    int motion_x, int motion_y);
800
void h263_encode_picture_header(MpegEncContext *s, int picture_number);
801
int h263_encode_gob_header(MpegEncContext * s, int mb_line);
802
int16_t *h263_pred_motion(MpegEncContext * s, int block, 
803
                        int *px, int *py);
804
void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n, 
805
                   int dir);
806
void ff_set_mpeg4_time(MpegEncContext * s, int picture_number);
807
void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
808
void h263_encode_init(MpegEncContext *s);
809
void h263_decode_init_vlc(MpegEncContext *s);
810
int h263_decode_picture_header(MpegEncContext *s);
811
int ff_h263_decode_gob_header(MpegEncContext *s);
812
int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
813

    
814

    
815
int intel_h263_decode_picture_header(MpegEncContext *s);
816
int ff_h263_decode_mb(MpegEncContext *s,
817
                      DCTELEM block[6][64]);
818
int h263_get_picture_format(int width, int height);
819
void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
820
void ff_mpeg4_clean_buffers(MpegEncContext *s);
821
void ff_mpeg4_stuffing(PutBitContext * pbc);
822
void ff_mpeg4_init_partitions(MpegEncContext *s);
823
void ff_mpeg4_merge_partitions(MpegEncContext *s);
824
void ff_clean_mpeg4_qscales(MpegEncContext *s);
825
void ff_clean_h263_qscales(MpegEncContext *s);
826
int ff_mpeg4_decode_partitions(MpegEncContext *s);
827
int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
828
int ff_h263_resync(MpegEncContext *s);
829
int ff_h263_get_gob_height(MpegEncContext *s);
830
void ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
831
inline int ff_h263_round_chroma(int x);
832

    
833

    
834
/* rv10.c */
835
void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
836
int rv_decode_dc(MpegEncContext *s, int n);
837

    
838

    
839
/* msmpeg4.c */
840
void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
841
void msmpeg4_encode_ext_header(MpegEncContext * s);
842
void msmpeg4_encode_mb(MpegEncContext * s, 
843
                       DCTELEM block[6][64],
844
                       int motion_x, int motion_y);
845
int msmpeg4_decode_picture_header(MpegEncContext * s);
846
int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
847
int ff_msmpeg4_decode_init(MpegEncContext *s);
848
void ff_msmpeg4_encode_init(MpegEncContext *s);
849
int ff_wmv2_decode_picture_header(MpegEncContext * s);
850
void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
851
void ff_mspel_motion(MpegEncContext *s,
852
                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
853
                               uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
854
                               int motion_x, int motion_y, int h);
855
int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
856
void ff_wmv2_encode_mb(MpegEncContext * s, 
857
                       DCTELEM block[6][64],
858
                       int motion_x, int motion_y);
859

    
860
/* mjpegenc.c */
861
int mjpeg_init(MpegEncContext *s);
862
void mjpeg_close(MpegEncContext *s);
863
void mjpeg_encode_mb(MpegEncContext *s, 
864
                     DCTELEM block[6][64]);
865
void mjpeg_picture_header(MpegEncContext *s);
866
void mjpeg_picture_trailer(MpegEncContext *s);
867

    
868

    
869
/* rate control */
870
int ff_rate_control_init(MpegEncContext *s);
871
float ff_rate_estimate_qscale(MpegEncContext *s);
872
void ff_write_pass1_stats(MpegEncContext *s);
873
void ff_rate_control_uninit(MpegEncContext *s);
874
double ff_eval(char *s, double *const_value, const char **const_name,
875
               double (**func1)(void *, double), const char **func1_name,
876
               double (**func2)(void *, double, double), char **func2_name,
877
               void *opaque);
878

    
879

    
880
#endif /* AVCODEC_MPEGVIDEO_H */