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ffmpeg / libavcodec / mpegvideo.h @ f038fe8b

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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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 * Copyright (c) 2002-2004 Michael Niedermayer
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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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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#include "bitstream.h"
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#define FRAME_SKIPPED 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_H261,
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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_THREADS 8
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#define MAX_PICTURE_COUNT 32
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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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#define MAX_MB_BYTES (30*16*16*3/8 + 120)
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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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    int header_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 skip_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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    double 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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    void *non_lavc_opaque;        ///< context for non lavc rc code (for example xvid)
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    float dry_run_qscale;         ///< for xvid rc
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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_base[2])[2];
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    uint32_t *mb_type_base;
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#define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if theres just one type
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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_PCM(a)        ((a)&MB_TYPE_INTRA_PCM)
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#define IS_INTRA(a)      ((a)&7)
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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_SKIP(a)       ((a)&MB_TYPE_SKIP)
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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_GMC(a)        ((a)&MB_TYPE_GMC)
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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_ACPRED(a)     ((a)&MB_TYPE_ACPRED)
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#define IS_QUANT(a)      ((a)&MB_TYPE_QUANT)
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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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#define HAS_CBP(a)        ((a)&MB_TYPE_CBP)
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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 ref_poc[2][16];         ///< h264 POCs of the frames used as reference
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    int ref_count[2];           ///< number of entries in ref_poc
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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 decision FIXME remove
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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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    unsigned int buffer_size;
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    uint32_t state;             ///< contains the last few bytes in MSB order
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    int frame_start_found;
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    int overread;               ///< the number of bytes which where irreversibly read from the next frame
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    int overread_index;         ///< the index into ParseContext.buffer of the overreaded bytes
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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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    AVCodecContext *avctx;
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    int skip;                          ///< set if ME is skipped 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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    uint8_t *best_mb;
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    uint8_t *temp_mb[2];
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    uint8_t *temp;
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    int best_bits;
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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 flags;
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    int sub_flags;
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    int mb_flags;
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    int pre_pass;                      ///< = 1 for the pre pass
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    int dia_size;
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    int xmin;
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    int xmax;
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    int ymin;
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    int ymax;
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    int pred_x;
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    int pred_y;
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    uint8_t *src[4][4];
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    uint8_t *ref[4][4];
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    int stride;
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    int uvstride;
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    /* temp variables for picture complexity calculation */
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    int mc_mb_var_sum_temp;
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    int mb_var_sum_temp;
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    int scene_change_score;
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/*    cmp, chroma_cmp;*/
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    op_pixels_func (*hpel_put)[4];
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    op_pixels_func (*hpel_avg)[4];
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    qpel_mc_func (*qpel_put)[16];
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    qpel_mc_func (*qpel_avg)[16];
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    uint8_t (*mv_penalty)[MAX_MV*2+1];  ///< amount of bits needed to encode a MV
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    uint8_t *current_mv_penalty;
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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 src_index, int ref_index,
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                                  int size, int h);
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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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    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_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
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    int h263_flv;     ///< use flv h263 header
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    enum CodecID codec_id;     /* see CODEC_ID_xxx */
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    int fixed_qscale; ///< fixed qscale if non zero
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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 flags2;       ///< AVCodecContext.flags2
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    int max_b_frames; ///< max number of b-frames for encoding
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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;  ///< used to set pic->display_picture_number, shouldnt be used for/by anything else
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    int coded_picture_number;  ///< used to set pic->coded_picture_number, shouldnt be used for/by anything else
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    int picture_number;       //FIXME remove, unclear definition
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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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    int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
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    int mb_width, mb_height;   ///< number of MBs horizontally & vertically
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    int mb_stride;             ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
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    int b8_stride;             ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
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    int b4_stride;             ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
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    int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
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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;          ///< main picture buffer
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    Picture **input_picture;   ///< next pictures on display order for encoding
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    Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
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    int start_mb_y;            ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
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    int end_mb_y;              ///< end   mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
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    struct MpegEncContext *thread_context[MAX_THREADS];
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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 *current_picture_ptr;  ///< pointer to the current picture
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    uint8_t *visualization_buffer[3]; //< temporary buffer vor MV visualization
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    int last_dc[3];                ///< last DC values for MPEG1
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    int16_t *dc_val_base;
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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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    const uint8_t *y_dc_scale_table;     ///< qscale -> y_dc_scale table
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    const uint8_t *c_dc_scale_table;     ///< qscale -> c_dc_scale table
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    const uint8_t *chroma_qscale_table;  ///< qscale -> chroma_qscale (h263)
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    uint8_t *coded_block_base;
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    uint8_t *coded_block;          ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
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    int16_t (*ac_val_base)[16];
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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_skipped;                ///< 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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    uint8_t *rd_scratchpad;       ///< scratchpad for rate distortion mb decision
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    uint8_t *obmc_scratchpad;
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    uint8_t *b_scratchpad;        ///< scratchpad used for writing into write only buffers
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    int qscale;                 ///< QP
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    int chroma_qscale;          ///< chroma QP
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    int lambda;                 ///< lagrange multipler used in rate distortion
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    int lambda2;                ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
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    int *lambda_table;
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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; //FIXME removes
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    int last_non_b_pict_type;   ///< used for mpeg4 gmc b-frames & ratecontrol
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    int dropable;
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    int frame_rate_index;
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    int last_lambda_for[5];     ///< last lambda for a specific pict type
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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 skipped (for encoding b frames for example)
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    DSPContext dsp;             ///< pointers for accelerated dsp functions
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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 (*p_mv_table_base)[2];
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    int16_t (*b_forw_mv_table_base)[2];
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    int16_t (*b_back_mv_table_base)[2];
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    int16_t (*b_bidir_forw_mv_table_base)[2];
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    int16_t (*b_bidir_back_mv_table_base)[2];
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    int16_t (*b_direct_mv_table_base)[2];
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    int16_t (*p_field_mv_table_base[2][2])[2];
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    int16_t (*b_field_mv_table_base[2][2][2])[2];
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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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    int16_t (*p_field_mv_table[2][2])[2];   ///< MV table (2MV per MB) interlaced p-frame encoding
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    int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
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    uint8_t (*p_field_select_table[2]);
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    uint8_t (*b_field_select_table[2][2]);
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    int me_method;                       ///< ME algorithm
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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
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    /**motion vectors for a macroblock
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       first coordinate : 0 = forward 1 = backward
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       second "         : depend on type
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       third  "         : 0 = x, 1 = y
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    */
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    int mv[2][4][2];
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    int field_select[2][2];
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    int last_mv[2][2][2];             ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
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    uint8_t *fcode_tab;               ///< smallest fcode needed for each MV
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    MotionEstContext me;
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    int no_rounding;  /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
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                        for b-frames rounding mode is allways 0 */
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    int hurry_up;     /**< when set to 1 during decoding, b frames will be skipped
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                         when set to 2 idct/dequant will be skipped too */
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    /* macroblock layer */
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    int mb_x, mb_y;
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    int mb_skip_run;
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    int mb_intra;
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    uint16_t *mb_type;           ///< Table for candidate MB types for encoding
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#define CANDIDATE_MB_TYPE_INTRA    0x01
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#define CANDIDATE_MB_TYPE_INTER    0x02
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#define CANDIDATE_MB_TYPE_INTER4V  0x04
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#define CANDIDATE_MB_TYPE_SKIPPED   0x08
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//#define MB_TYPE_GMC      0x10
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#define CANDIDATE_MB_TYPE_DIRECT   0x10
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#define CANDIDATE_MB_TYPE_FORWARD  0x20
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#define CANDIDATE_MB_TYPE_BACKWARD 0x40
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#define CANDIDATE_MB_TYPE_BIDIR    0x80
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#define CANDIDATE_MB_TYPE_INTER_I    0x100
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#define CANDIDATE_MB_TYPE_FORWARD_I  0x200
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#define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
458
#define CANDIDATE_MB_TYPE_BIDIR_I    0x800
459

    
460
    int block_index[6]; ///< index to current MB in block based arrays with edges
461
    int block_wrap[6];
462
    uint8_t *dest[3];
463

    
464
    int *mb_index2xy;        ///< mb_index -> mb_x + mb_y*mb_stride
465

    
466
    /** matrix transmitted in the bitstream */
467
    uint16_t intra_matrix[64];
468
    uint16_t chroma_intra_matrix[64];
469
    uint16_t inter_matrix[64];
470
    uint16_t chroma_inter_matrix[64];
471
#define QUANT_BIAS_SHIFT 8
472
    int intra_quant_bias;    ///< bias for the quantizer
473
    int inter_quant_bias;    ///< bias for the quantizer
474
    int min_qcoeff;          ///< minimum encodable coefficient
475
    int max_qcoeff;          ///< maximum encodable coefficient
476
    int ac_esc_length;       ///< num of bits needed to encode the longest esc
477
    uint8_t *intra_ac_vlc_length;
478
    uint8_t *intra_ac_vlc_last_length;
479
    uint8_t *inter_ac_vlc_length;
480
    uint8_t *inter_ac_vlc_last_length;
481
    uint8_t *luma_dc_vlc_length;
482
    uint8_t *chroma_dc_vlc_length;
483
#define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
484

    
485
    int coded_score[6];
486

    
487
    /** precomputed matrix (combine qscale and DCT renorm) */
488
    int (*q_intra_matrix)[64];
489
    int (*q_inter_matrix)[64];
490
    /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
491
    uint16_t (*q_intra_matrix16)[2][64];
492
    uint16_t (*q_inter_matrix16)[2][64];
493
    int block_last_index[12];  ///< last non zero coefficient in block
494
    /* scantables */
495
    ScanTable __align8 intra_scantable;
496
    ScanTable intra_h_scantable;
497
    ScanTable intra_v_scantable;
498
    ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
499

    
500
    /* noise reduction */
501
    int (*dct_error_sum)[64];
502
    int dct_count[2];
503
    uint16_t (*dct_offset)[64];
504

    
505
    void *opaque;              ///< private data for the user
506

    
507
    /* bit rate control */
508
    int64_t wanted_bits;
509
    int64_t total_bits;
510
    int frame_bits;                ///< bits used for the current frame
511
    RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
512

    
513
    /* statistics, used for 2-pass encoding */
514
    int mv_bits;
515
    int header_bits;
516
    int i_tex_bits;
517
    int p_tex_bits;
518
    int i_count;
519
    int f_count;
520
    int b_count;
521
    int skip_count;
522
    int misc_bits; ///< cbp, mb_type
523
    int last_bits; ///< temp var used for calculating the above vars
524

    
525
    /* error concealment / resync */
526
    int error_count;
527
    uint8_t *error_status_table;       ///< table of the error status of each MB
528
#define VP_START            1          ///< current MB is the first after a resync marker
529
#define AC_ERROR            2
530
#define DC_ERROR            4
531
#define MV_ERROR            8
532
#define AC_END              16
533
#define DC_END              32
534
#define MV_END              64
535
//FIXME some prefix?
536

    
537
    int resync_mb_x;                 ///< x position of last resync marker
538
    int resync_mb_y;                 ///< y position of last resync marker
539
    GetBitContext last_resync_gb;    ///< used to search for the next resync marker
540
    int mb_num_left;                 ///< number of MBs left in this video packet (for partitioned Slices only)
541
    int next_p_frame_damaged;        ///< set if the next p frame is damaged, to avoid showing trashed b frames
542
    int error_resilience;
543

    
544
    ParseContext parse_context;
545

    
546
    /* H.263 specific */
547
    int gob_index;
548
    int obmc;                       ///< overlapped block motion compensation
549

    
550
    /* H.263+ specific */
551
    int umvplus;                    ///< == H263+ && unrestricted_mv
552
    int h263_aic;                   ///< Advanded INTRA Coding (AIC)
553
    int h263_aic_dir;               ///< AIC direction: 0 = left, 1 = top
554
    int h263_slice_structured;
555
    int alt_inter_vlc;              ///< alternative inter vlc
556
    int modified_quant;
557
    int loop_filter;
558
    int custom_pcf;
559

    
560
    /* mpeg4 specific */
561
    int time_increment_bits;        ///< number of bits to represent the fractional part of time
562
    int last_time_base;
563
    int time_base;                  ///< time in seconds of last I,P,S Frame
564
    int64_t time;                   ///< time of current frame
565
    int64_t last_non_b_time;
566
    uint16_t pp_time;               ///< time distance between the last 2 p,s,i frames
567
    uint16_t pb_time;               ///< time distance between the last b and p,s,i frame
568
    uint16_t pp_field_time;
569
    uint16_t pb_field_time;         ///< like above, just for interlaced
570
    int shape;
571
    int vol_sprite_usage;
572
    int sprite_width;
573
    int sprite_height;
574
    int sprite_left;
575
    int sprite_top;
576
    int sprite_brightness_change;
577
    int num_sprite_warping_points;
578
    int real_sprite_warping_points;
579
    int sprite_offset[2][2];         ///< sprite offset[isChroma][isMVY]
580
    int sprite_delta[2][2];          ///< sprite_delta [isY][isMVY]
581
    int sprite_shift[2];             ///< sprite shift [isChroma]
582
    int mcsel;
583
    int quant_precision;
584
    int quarter_sample;              ///< 1->qpel, 0->half pel ME/MC
585
    int scalability;
586
    int hierachy_type;
587
    int enhancement_type;
588
    int new_pred;
589
    int reduced_res_vop;
590
    int aspect_ratio_info; //FIXME remove
591
    int sprite_warping_accuracy;
592
    int low_latency_sprite;
593
    int data_partitioning;           ///< data partitioning flag from header
594
    int partitioned_frame;           ///< is current frame partitioned
595
    int rvlc;                        ///< reversible vlc
596
    int resync_marker;               ///< could this stream contain resync markers
597
    int low_delay;                   ///< no reordering needed / has no b-frames
598
    int vo_type;
599
    int vol_control_parameters;      ///< does the stream contain the low_delay flag, used to workaround buggy encoders
600
    int intra_dc_threshold;          ///< QP above whch the ac VLC should be used for intra dc
601
    PutBitContext tex_pb;            ///< used for data partitioned VOPs
602
    PutBitContext pb2;               ///< used for data partitioned VOPs
603
    int mpeg_quant;
604
    int t_frame;                       ///< time distance of first I -> B, used for interlaced b frames
605
    int padding_bug_score;             ///< used to detect the VERY common padding bug in MPEG4
606

    
607
    /* divx specific, used to workaround (many) bugs in divx5 */
608
    int divx_version;
609
    int divx_build;
610
    int divx_packed;
611
    uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
612
    int bitstream_buffer_size;
613
    unsigned int allocated_bitstream_buffer_size;
614

    
615
    int xvid_build;
616

    
617
    /* lavc specific stuff, used to workaround bugs in libavcodec */
618
    int lavc_build;
619

    
620
    /* RV10 specific */
621
    int rv10_version; ///< RV10 version: 0 or 3
622
    int rv10_first_dc_coded[3];
623

    
624
    /* MJPEG specific */
625
    struct MJpegContext *mjpeg_ctx;
626
    int mjpeg_vsample[3];       ///< vertical sampling factors, default = {2, 1, 1}
627
    int mjpeg_hsample[3];       ///< horizontal sampling factors, default = {2, 1, 1}
628
    int mjpeg_write_tables;     ///< do we want to have quantisation- and huffmantables in the jpeg file ?
629
    int mjpeg_data_only_frames; ///< frames only with SOI, SOS and EOI markers
630

    
631
    /* MSMPEG4 specific */
632
    int mv_table_index;
633
    int rl_table_index;
634
    int rl_chroma_table_index;
635
    int dc_table_index;
636
    int use_skip_mb_code;
637
    int slice_height;      ///< in macroblocks
638
    int first_slice_line;  ///< used in mpeg4 too to handle resync markers
639
    int flipflop_rounding;
640
    int msmpeg4_version;   ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
641
    int per_mb_rl_table;
642
    int esc3_level_length;
643
    int esc3_run_length;
644
    /** [mb_intra][isChroma][level][run][last] */
645
    int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
646
    int inter_intra_pred;
647
    int mspel;
648

    
649
    /* decompression specific */
650
    GetBitContext gb;
651

    
652
    /* Mpeg1 specific */
653
    int gop_picture_number;  ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
654
    int last_mv_dir;         ///< last mv_dir, used for b frame encoding
655
    int broken_link;         ///< no_output_of_prior_pics_flag
656
    uint8_t *vbv_delay_ptr;  ///< pointer to vbv_delay in the bitstream
657

    
658
    /* MPEG2 specific - I wish I had not to support this mess. */
659
    int progressive_sequence;
660
    int mpeg_f_code[2][2];
661
    int picture_structure;
662
/* picture type */
663
#define PICT_TOP_FIELD     1
664
#define PICT_BOTTOM_FIELD  2
665
#define PICT_FRAME         3
666

    
667
    int intra_dc_precision;
668
    int frame_pred_frame_dct;
669
    int top_field_first;
670
    int concealment_motion_vectors;
671
    int q_scale_type;
672
    int intra_vlc_format;
673
    int alternate_scan;
674
    int repeat_first_field;
675
    int chroma_420_type;
676
    int chroma_format;
677
#define CHROMA_420 1
678
#define CHROMA_422 2
679
#define CHROMA_444 3
680
    int chroma_x_shift;//depend on pix_format, that depend on chroma_format
681
    int chroma_y_shift;
682

    
683
    int progressive_frame;
684
    int full_pel[2];
685
    int interlaced_dct;
686
    int first_slice;
687
    int first_field;         ///< is 1 for the first field of a field picture 0 otherwise
688

    
689
    /* RTP specific */
690
    int rtp_mode;
691

    
692
    uint8_t *ptr_lastgob;
693
    int swap_uv;//vcr2 codec is mpeg2 varint with UV swaped
694
    short * pblocks[12];
695

    
696
    DCTELEM (*block)[64]; ///< points to one of the following blocks
697
    DCTELEM (*blocks)[6][64]; // for HQ mode we need to keep the best block
698
    int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
699
#define SLICE_OK         0
700
#define SLICE_ERROR     -1
701
#define SLICE_END       -2 ///<end marker found
702
#define SLICE_NOEND     -3 ///<no end marker or error found but mb count exceeded
703

    
704
    void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
705
                           DCTELEM *block/*align 16*/, int n, int qscale);
706
    void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
707
                           DCTELEM *block/*align 16*/, int n, int qscale);
708
    void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
709
                           DCTELEM *block/*align 16*/, int n, int qscale);
710
    void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
711
                           DCTELEM *block/*align 16*/, int n, int qscale);
712
    void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
713
                           DCTELEM *block/*align 16*/, int n, int qscale);
714
    void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
715
                           DCTELEM *block/*align 16*/, int n, int qscale);
716
    void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
717
                           DCTELEM *block/*align 16*/, int n, int qscale);
718
    void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
719
                           DCTELEM *block/*align 16*/, int n, int qscale);
720
    void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
721
                           DCTELEM *block/*align 16*/, int n, int qscale);
722
    void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
723
                           DCTELEM *block/*align 16*/, int n, int qscale);
724
    int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
725
    int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
726
    void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
727
} MpegEncContext;
728

    
729

    
730
int DCT_common_init(MpegEncContext *s);
731
void MPV_decode_defaults(MpegEncContext *s);
732
int MPV_common_init(MpegEncContext *s);
733
void MPV_common_end(MpegEncContext *s);
734
void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
735
int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
736
void MPV_frame_end(MpegEncContext *s);
737
int MPV_encode_init(AVCodecContext *avctx);
738
int MPV_encode_end(AVCodecContext *avctx);
739
int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
740
#ifdef HAVE_MMX
741
void MPV_common_init_mmx(MpegEncContext *s);
742
#endif
743
#ifdef ARCH_ALPHA
744
void MPV_common_init_axp(MpegEncContext *s);
745
#endif
746
#ifdef HAVE_MLIB
747
void MPV_common_init_mlib(MpegEncContext *s);
748
#endif
749
#ifdef HAVE_MMI
750
void MPV_common_init_mmi(MpegEncContext *s);
751
#endif
752
#ifdef ARCH_ARMV4L
753
void MPV_common_init_armv4l(MpegEncContext *s);
754
#endif
755
#ifdef ARCH_POWERPC
756
void MPV_common_init_ppc(MpegEncContext *s);
757
#endif
758
extern void (*draw_edges)(uint8_t *buf, int wrap, int width, int height, int w);
759
void ff_copy_bits(PutBitContext *pb, uint8_t *src, int length);
760
void ff_clean_intra_table_entries(MpegEncContext *s);
761
void ff_init_scantable(uint8_t *, ScanTable *st, const uint8_t *src_scantable);
762
void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
763
void ff_emulated_edge_mc(uint8_t *buf, uint8_t *src, int linesize, int block_w, int block_h,
764
                                    int src_x, int src_y, int w, int h);
765
#define END_NOT_FOUND -100
766
int ff_combine_frame(ParseContext *pc, int next, uint8_t **buf, int *buf_size);
767
void ff_parse_close(AVCodecParserContext *s);
768
void ff_mpeg_flush(AVCodecContext *avctx);
769
void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
770
void ff_write_quant_matrix(PutBitContext *pb, int16_t *matrix);
771
int ff_find_unused_picture(MpegEncContext *s, int shared);
772
void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
773
void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
774

    
775
void ff_er_frame_start(MpegEncContext *s);
776
void ff_er_frame_end(MpegEncContext *s);
777
void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
778

    
779

    
780
extern enum PixelFormat ff_yuv420p_list[2];
781

    
782
void ff_init_block_index(MpegEncContext *s);
783

    
784
static inline void ff_update_block_index(MpegEncContext *s){
785
    const int block_size= 8>>s->avctx->lowres;
786

    
787
    s->block_index[0]+=2;
788
    s->block_index[1]+=2;
789
    s->block_index[2]+=2;
790
    s->block_index[3]+=2;
791
    s->block_index[4]++;
792
    s->block_index[5]++;
793
    s->dest[0]+= 2*block_size;
794
    s->dest[1]+= block_size;
795
    s->dest[2]+= block_size;
796
}
797

    
798
static inline int get_bits_diff(MpegEncContext *s){
799
    const int bits= put_bits_count(&s->pb);
800
    const int last= s->last_bits;
801

    
802
    s->last_bits = bits;
803

    
804
    return bits - last;
805
}
806

    
807
/* motion_est.c */
808
void ff_estimate_p_frame_motion(MpegEncContext * s,
809
                             int mb_x, int mb_y);
810
void ff_estimate_b_frame_motion(MpegEncContext * s,
811
                             int mb_x, int mb_y);
812
int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
813
void ff_fix_long_p_mvs(MpegEncContext * s);
814
void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
815
                     int16_t (*mv_table)[2], int f_code, int type, int truncate);
816
void ff_init_me(MpegEncContext *s);
817
int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
818
inline int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
819
                             int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
820
                             int ref_mv_scale, int size, int h);
821
int inline ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
822
                               int ref_index, int size, int h, int add_rate);
823

    
824
/* mpeg12.c */
825
extern const int16_t ff_mpeg1_default_intra_matrix[64];
826
extern const int16_t ff_mpeg1_default_non_intra_matrix[64];
827
extern const uint8_t ff_mpeg1_dc_scale_table[128];
828

    
829
void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
830
void mpeg1_encode_mb(MpegEncContext *s,
831
                     DCTELEM block[6][64],
832
                     int motion_x, int motion_y);
833
void ff_mpeg1_encode_init(MpegEncContext *s);
834
void ff_mpeg1_encode_slice_header(MpegEncContext *s);
835
void ff_mpeg1_clean_buffers(MpegEncContext *s);
836
int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
837

    
838

    
839
/** RLTable. */
840
typedef struct RLTable {
841
    int n;                         ///< number of entries of table_vlc minus 1
842
    int last;                      ///< number of values for last = 0
843
    const uint16_t (*table_vlc)[2];
844
    const int8_t *table_run;
845
    const int8_t *table_level;
846
    uint8_t *index_run[2];         ///< encoding only
847
    int8_t *max_level[2];          ///< encoding & decoding
848
    int8_t *max_run[2];            ///< encoding & decoding
849
    VLC vlc;                       ///< decoding only deprected FIXME remove
850
    RL_VLC_ELEM *rl_vlc[32];       ///< decoding only
851
} RLTable;
852

    
853
void init_rl(RLTable *rl, int use_static);
854
void init_vlc_rl(RLTable *rl, int use_static);
855

    
856
static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
857
{
858
    int index;
859
    index = rl->index_run[last][run];
860
    if (index >= rl->n)
861
        return rl->n;
862
    if (level > rl->max_level[last][run])
863
        return rl->n;
864
    return index + level - 1;
865
}
866

    
867
extern const uint8_t ff_mpeg4_y_dc_scale_table[32];
868
extern const uint8_t ff_mpeg4_c_dc_scale_table[32];
869
extern const uint8_t ff_aic_dc_scale_table[32];
870
extern const int16_t ff_mpeg4_default_intra_matrix[64];
871
extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
872
extern const uint8_t ff_h263_chroma_qscale_table[32];
873
extern const uint8_t ff_h263_loop_filter_strength[32];
874

    
875
/* h261.c */
876
void ff_h261_loop_filter(MpegEncContext *s);
877
void ff_h261_reorder_mb_index(MpegEncContext* s);
878
void ff_h261_encode_mb(MpegEncContext *s,
879
                    DCTELEM block[6][64],
880
                    int motion_x, int motion_y);
881
void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
882
void ff_h261_encode_init(MpegEncContext *s);
883

    
884

    
885
/* h263.c, h263dec.c */
886
int ff_h263_decode_init(AVCodecContext *avctx);
887
int ff_h263_decode_frame(AVCodecContext *avctx,
888
                             void *data, int *data_size,
889
                             uint8_t *buf, int buf_size);
890
int ff_h263_decode_end(AVCodecContext *avctx);
891
void h263_encode_mb(MpegEncContext *s,
892
                    DCTELEM block[6][64],
893
                    int motion_x, int motion_y);
894
void mpeg4_encode_mb(MpegEncContext *s,
895
                    DCTELEM block[6][64],
896
                    int motion_x, int motion_y);
897
void h263_encode_picture_header(MpegEncContext *s, int picture_number);
898
void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number);
899
void h263_encode_gob_header(MpegEncContext * s, int mb_line);
900
int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir,
901
                        int *px, int *py);
902
void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
903
                   int dir);
904
void ff_set_mpeg4_time(MpegEncContext * s, int picture_number);
905
void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
906
void h263_encode_init(MpegEncContext *s);
907
void h263_decode_init_vlc(MpegEncContext *s);
908
int h263_decode_picture_header(MpegEncContext *s);
909
int ff_h263_decode_gob_header(MpegEncContext *s);
910
int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
911
void ff_h263_update_motion_val(MpegEncContext * s);
912
void ff_h263_loop_filter(MpegEncContext * s);
913
void ff_set_qscale(MpegEncContext * s, int qscale);
914
int ff_h263_decode_mba(MpegEncContext *s);
915
void ff_h263_encode_mba(MpegEncContext *s);
916

    
917
int intel_h263_decode_picture_header(MpegEncContext *s);
918
int flv_h263_decode_picture_header(MpegEncContext *s);
919
int ff_h263_decode_mb(MpegEncContext *s,
920
                      DCTELEM block[6][64]);
921
int ff_mpeg4_decode_mb(MpegEncContext *s,
922
                      DCTELEM block[6][64]);
923
int h263_get_picture_format(int width, int height);
924
void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
925
void ff_mpeg4_clean_buffers(MpegEncContext *s);
926
void ff_mpeg4_stuffing(PutBitContext * pbc);
927
void ff_mpeg4_init_partitions(MpegEncContext *s);
928
void ff_mpeg4_merge_partitions(MpegEncContext *s);
929
void ff_clean_mpeg4_qscales(MpegEncContext *s);
930
void ff_clean_h263_qscales(MpegEncContext *s);
931
int ff_mpeg4_decode_partitions(MpegEncContext *s);
932
int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
933
int ff_h263_resync(MpegEncContext *s);
934
int ff_h263_get_gob_height(MpegEncContext *s);
935
int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
936
int ff_h263_round_chroma(int x);
937
void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
938
int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
939

    
940

    
941
/* rv10.c */
942
void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
943
int rv_decode_dc(MpegEncContext *s, int n);
944
void rv20_encode_picture_header(MpegEncContext *s, int picture_number);
945

    
946

    
947
/* msmpeg4.c */
948
void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
949
void msmpeg4_encode_ext_header(MpegEncContext * s);
950
void msmpeg4_encode_mb(MpegEncContext * s,
951
                       DCTELEM block[6][64],
952
                       int motion_x, int motion_y);
953
int msmpeg4_decode_picture_header(MpegEncContext * s);
954
int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
955
int ff_msmpeg4_decode_init(MpegEncContext *s);
956
void ff_msmpeg4_encode_init(MpegEncContext *s);
957
int ff_wmv2_decode_picture_header(MpegEncContext * s);
958
int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
959
void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
960
void ff_mspel_motion(MpegEncContext *s,
961
                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
962
                               uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
963
                               int motion_x, int motion_y, int h);
964
int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
965
void ff_wmv2_encode_mb(MpegEncContext * s,
966
                       DCTELEM block[6][64],
967
                       int motion_x, int motion_y);
968

    
969
/* mjpeg.c */
970
int mjpeg_init(MpegEncContext *s);
971
void mjpeg_close(MpegEncContext *s);
972
void mjpeg_encode_mb(MpegEncContext *s,
973
                     DCTELEM block[6][64]);
974
void mjpeg_picture_header(MpegEncContext *s);
975
void mjpeg_picture_trailer(MpegEncContext *s);
976
void ff_mjpeg_stuffing(PutBitContext * pbc);
977

    
978

    
979
/* rate control */
980
int ff_rate_control_init(MpegEncContext *s);
981
float ff_rate_estimate_qscale(MpegEncContext *s, int dry_run);
982
void ff_write_pass1_stats(MpegEncContext *s);
983
void ff_rate_control_uninit(MpegEncContext *s);
984
double ff_eval(char *s, double *const_value, const char **const_name,
985
               double (**func1)(void *, double), const char **func1_name,
986
               double (**func2)(void *, double, double), char **func2_name,
987
               void *opaque);
988
int ff_vbv_update(MpegEncContext *s, int frame_size);
989
void ff_get_2pass_fcode(MpegEncContext *s);
990

    
991
int ff_xvid_rate_control_init(MpegEncContext *s);
992
void ff_xvid_rate_control_uninit(MpegEncContext *s);
993
float ff_xvid_rate_estimate_qscale(MpegEncContext *s, int dry_run);
994

    
995
#endif /* AVCODEC_MPEGVIDEO_H */