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ffmpeg / libavcodec / mpegvideo.h @ 5b21bdab

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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 file is part of FFmpeg.
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 *
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 * FFmpeg 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 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg 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 FFmpeg; 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 FFMPEG_MPEGVIDEO_H
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#define FFMPEG_MPEGVIDEO_H
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#include "dsputil.h"
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#include "bitstream.h"
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#include "ratecontrol.h"
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#include "parser.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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#define INPLACE_OFFSET 16
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/* Start codes. */
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#define SEQ_END_CODE            0x000001b7
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#define SEQ_START_CODE          0x000001b3
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#define GOP_START_CODE          0x000001b8
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#define PICTURE_START_CODE      0x00000100
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#define SLICE_MIN_START_CODE    0x00000101
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#define SLICE_MAX_START_CODE    0x000001af
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#define EXT_START_CODE          0x000001b5
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#define USER_START_CODE         0x000001b2
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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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    DECLARE_ALIGNED_8(uint8_t, 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 does not 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 (raw frame_num from slice header)
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    int pic_id;                 /**< h264 pic_num (short -> no wrap version of pic_num,
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                                     pic_num & max_pic_num; long -> long_pic_num) */
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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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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 does not 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;                /*!< an estimate of the bits required to
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                                        code a given mv value, e.g. (1,0) takes
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                                        more bits than (0,0). We have to
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                                        estimate whether any reduction in
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                                        residual is worth the extra bits. */
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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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    int codec_tag;             ///< internal codec_tag upper case converted from avctx codec_tag
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    int stream_codec_tag;      ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
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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, should not be used for/by anything else
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    int coded_picture_number;  ///< used to set pic->coded_picture_number, should not 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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    unsigned int lambda;        ///< lagrange multipler used in rate distortion
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    unsigned 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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    int skipdct;                ///< skip dct and code zero residual
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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_FORWARD   1
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#define MV_DIR_BACKWARD  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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    int16_t direct_scale_mv[2][64];   ///< precomputed to avoid divisions in ff_mpeg4_set_direct_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 always 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
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#define CANDIDATE_MB_TYPE_BIDIR_I    0x800
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#define CANDIDATE_MB_TYPE_DIRECT0    0x1000
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    int block_index[6]; ///< index to current MB in block based arrays with edges
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    int block_wrap[6];
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    uint8_t *dest[3];
426

    
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    int *mb_index2xy;        ///< mb_index -> mb_x + mb_y*mb_stride
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    /** matrix transmitted in the bitstream */
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    uint16_t intra_matrix[64];
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    uint16_t chroma_intra_matrix[64];
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    uint16_t inter_matrix[64];
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    uint16_t chroma_inter_matrix[64];
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#define QUANT_BIAS_SHIFT 8
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    int intra_quant_bias;    ///< bias for the quantizer
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    int inter_quant_bias;    ///< bias for the quantizer
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    int min_qcoeff;          ///< minimum encodable coefficient
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    int max_qcoeff;          ///< maximum encodable coefficient
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    int ac_esc_length;       ///< num of bits needed to encode the longest esc
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    uint8_t *intra_ac_vlc_length;
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    uint8_t *intra_ac_vlc_last_length;
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    uint8_t *inter_ac_vlc_length;
443
    uint8_t *inter_ac_vlc_last_length;
444
    uint8_t *luma_dc_vlc_length;
445
    uint8_t *chroma_dc_vlc_length;
446
#define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
447

    
448
    int coded_score[8];
449

    
450
    /** precomputed matrix (combine qscale and DCT renorm) */
451
    int (*q_intra_matrix)[64];
452
    int (*q_inter_matrix)[64];
453
    /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
454
    uint16_t (*q_intra_matrix16)[2][64];
455
    uint16_t (*q_inter_matrix16)[2][64];
456
    int block_last_index[12];  ///< last non zero coefficient in block
457
    /* scantables */
458
    DECLARE_ALIGNED_8(ScanTable, intra_scantable);
459
    ScanTable intra_h_scantable;
460
    ScanTable intra_v_scantable;
461
    ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
462

    
463
    /* noise reduction */
464
    int (*dct_error_sum)[64];
465
    int dct_count[2];
466
    uint16_t (*dct_offset)[64];
467

    
468
    void *opaque;              ///< private data for the user
469

    
470
    /* bit rate control */
471
    int64_t wanted_bits;
472
    int64_t total_bits;
473
    int frame_bits;                ///< bits used for the current frame
474
    int next_lambda;               ///< next lambda used for retrying to encode a frame
475
    RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
476

    
477
    /* statistics, used for 2-pass encoding */
478
    int mv_bits;
479
    int header_bits;
480
    int i_tex_bits;
481
    int p_tex_bits;
482
    int i_count;
483
    int f_count;
484
    int b_count;
485
    int skip_count;
486
    int misc_bits; ///< cbp, mb_type
487
    int last_bits; ///< temp var used for calculating the above vars
488

    
489
    /* error concealment / resync */
490
    int error_count;
491
    uint8_t *error_status_table;       ///< table of the error status of each MB
492
#define VP_START            1          ///< current MB is the first after a resync marker
493
#define AC_ERROR            2
494
#define DC_ERROR            4
495
#define MV_ERROR            8
496
#define AC_END              16
497
#define DC_END              32
498
#define MV_END              64
499
//FIXME some prefix?
500

    
501
    int resync_mb_x;                 ///< x position of last resync marker
502
    int resync_mb_y;                 ///< y position of last resync marker
503
    GetBitContext last_resync_gb;    ///< used to search for the next resync marker
504
    int mb_num_left;                 ///< number of MBs left in this video packet (for partitioned Slices only)
505
    int next_p_frame_damaged;        ///< set if the next p frame is damaged, to avoid showing trashed b frames
506
    int error_resilience;
507

    
508
    ParseContext parse_context;
509

    
510
    /* H.263 specific */
511
    int gob_index;
512
    int obmc;                       ///< overlapped block motion compensation
513

    
514
    /* H.263+ specific */
515
    int umvplus;                    ///< == H263+ && unrestricted_mv
516
    int h263_aic;                   ///< Advanded INTRA Coding (AIC)
517
    int h263_aic_dir;               ///< AIC direction: 0 = left, 1 = top
518
    int h263_slice_structured;
519
    int alt_inter_vlc;              ///< alternative inter vlc
520
    int modified_quant;
521
    int loop_filter;
522
    int custom_pcf;
523

    
524
    /* mpeg4 specific */
525
    int time_increment_bits;        ///< number of bits to represent the fractional part of time
526
    int last_time_base;
527
    int time_base;                  ///< time in seconds of last I,P,S Frame
528
    int64_t time;                   ///< time of current frame
529
    int64_t last_non_b_time;
530
    uint16_t pp_time;               ///< time distance between the last 2 p,s,i frames
531
    uint16_t pb_time;               ///< time distance between the last b and p,s,i frame
532
    uint16_t pp_field_time;
533
    uint16_t pb_field_time;         ///< like above, just for interlaced
534
    int shape;
535
    int vol_sprite_usage;
536
    int sprite_width;
537
    int sprite_height;
538
    int sprite_left;
539
    int sprite_top;
540
    int sprite_brightness_change;
541
    int num_sprite_warping_points;
542
    int real_sprite_warping_points;
543
    int sprite_offset[2][2];         ///< sprite offset[isChroma][isMVY]
544
    int sprite_delta[2][2];          ///< sprite_delta [isY][isMVY]
545
    int sprite_shift[2];             ///< sprite shift [isChroma]
546
    int mcsel;
547
    int quant_precision;
548
    int quarter_sample;              ///< 1->qpel, 0->half pel ME/MC
549
    int scalability;
550
    int hierachy_type;
551
    int enhancement_type;
552
    int new_pred;
553
    int reduced_res_vop;
554
    int aspect_ratio_info; //FIXME remove
555
    int sprite_warping_accuracy;
556
    int low_latency_sprite;
557
    int data_partitioning;           ///< data partitioning flag from header
558
    int partitioned_frame;           ///< is current frame partitioned
559
    int rvlc;                        ///< reversible vlc
560
    int resync_marker;               ///< could this stream contain resync markers
561
    int low_delay;                   ///< no reordering needed / has no b-frames
562
    int vo_type;
563
    int vol_control_parameters;      ///< does the stream contain the low_delay flag, used to workaround buggy encoders
564
    int intra_dc_threshold;          ///< QP above whch the ac VLC should be used for intra dc
565
    int use_intra_dc_vlc;
566
    PutBitContext tex_pb;            ///< used for data partitioned VOPs
567
    PutBitContext pb2;               ///< used for data partitioned VOPs
568
    int mpeg_quant;
569
    int t_frame;                       ///< time distance of first I -> B, used for interlaced b frames
570
    int padding_bug_score;             ///< used to detect the VERY common padding bug in MPEG4
571

    
572
    /* divx specific, used to workaround (many) bugs in divx5 */
573
    int divx_version;
574
    int divx_build;
575
    int divx_packed;
576
    uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
577
    int bitstream_buffer_size;
578
    unsigned int allocated_bitstream_buffer_size;
579

    
580
    int xvid_build;
581

    
582
    /* lavc specific stuff, used to workaround bugs in libavcodec */
583
    int lavc_build;
584

    
585
    /* RV10 specific */
586
    int rv10_version; ///< RV10 version: 0 or 3
587
    int rv10_first_dc_coded[3];
588

    
589
    /* MJPEG specific */
590
    struct MJpegContext *mjpeg_ctx;
591
    int mjpeg_vsample[3];       ///< vertical sampling factors, default = {2, 1, 1}
592
    int mjpeg_hsample[3];       ///< horizontal sampling factors, default = {2, 1, 1}
593

    
594
    /* MSMPEG4 specific */
595
    int mv_table_index;
596
    int rl_table_index;
597
    int rl_chroma_table_index;
598
    int dc_table_index;
599
    int use_skip_mb_code;
600
    int slice_height;      ///< in macroblocks
601
    int first_slice_line;  ///< used in mpeg4 too to handle resync markers
602
    int flipflop_rounding;
603
    int msmpeg4_version;   ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
604
    int per_mb_rl_table;
605
    int esc3_level_length;
606
    int esc3_run_length;
607
    /** [mb_intra][isChroma][level][run][last] */
608
    int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
609
    int inter_intra_pred;
610
    int mspel;
611

    
612
    /* decompression specific */
613
    GetBitContext gb;
614

    
615
    /* Mpeg1 specific */
616
    int gop_picture_number;  ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
617
    int last_mv_dir;         ///< last mv_dir, used for b frame encoding
618
    int broken_link;         ///< no_output_of_prior_pics_flag
619
    uint8_t *vbv_delay_ptr;  ///< pointer to vbv_delay in the bitstream
620

    
621
    /* MPEG2 specific - I wish I had not to support this mess. */
622
    int progressive_sequence;
623
    int mpeg_f_code[2][2];
624
    int picture_structure;
625
/* picture type */
626
#define PICT_TOP_FIELD     1
627
#define PICT_BOTTOM_FIELD  2
628
#define PICT_FRAME         3
629

    
630
    int intra_dc_precision;
631
    int frame_pred_frame_dct;
632
    int top_field_first;
633
    int concealment_motion_vectors;
634
    int q_scale_type;
635
    int intra_vlc_format;
636
    int alternate_scan;
637
    int repeat_first_field;
638
    int chroma_420_type;
639
    int chroma_format;
640
#define CHROMA_420 1
641
#define CHROMA_422 2
642
#define CHROMA_444 3
643
    int chroma_x_shift;//depend on pix_format, that depend on chroma_format
644
    int chroma_y_shift;
645

    
646
    int progressive_frame;
647
    int full_pel[2];
648
    int interlaced_dct;
649
    int first_slice;
650
    int first_field;         ///< is 1 for the first field of a field picture 0 otherwise
651

    
652
    /* RTP specific */
653
    int rtp_mode;
654

    
655
    uint8_t *ptr_lastgob;
656
    int swap_uv;//vcr2 codec is mpeg2 varint with UV swaped
657
    short * pblocks[12];
658

    
659
    DCTELEM (*block)[64]; ///< points to one of the following blocks
660
    DCTELEM (*blocks)[8][64]; // for HQ mode we need to keep the best block
661
    int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
662
#define SLICE_OK         0
663
#define SLICE_ERROR     -1
664
#define SLICE_END       -2 ///<end marker found
665
#define SLICE_NOEND     -3 ///<no end marker or error found but mb count exceeded
666

    
667
    void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
668
                           DCTELEM *block/*align 16*/, int n, int qscale);
669
    void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
670
                           DCTELEM *block/*align 16*/, int n, int qscale);
671
    void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
672
                           DCTELEM *block/*align 16*/, int n, int qscale);
673
    void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
674
                           DCTELEM *block/*align 16*/, int n, int qscale);
675
    void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
676
                           DCTELEM *block/*align 16*/, int n, int qscale);
677
    void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
678
                           DCTELEM *block/*align 16*/, int n, int qscale);
679
    void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
680
                           DCTELEM *block/*align 16*/, int n, int qscale);
681
    void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
682
                           DCTELEM *block/*align 16*/, int n, int qscale);
683
    void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
684
                           DCTELEM *block/*align 16*/, int n, int qscale);
685
    void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
686
                           DCTELEM *block/*align 16*/, int n, int qscale);
687
    int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
688
    int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
689
    void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
690
} MpegEncContext;
691

    
692

    
693
void MPV_decode_defaults(MpegEncContext *s);
694
int MPV_common_init(MpegEncContext *s);
695
void MPV_common_end(MpegEncContext *s);
696
void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
697
int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
698
void MPV_frame_end(MpegEncContext *s);
699
int MPV_encode_init(AVCodecContext *avctx);
700
int MPV_encode_end(AVCodecContext *avctx);
701
int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
702
void MPV_common_init_mmx(MpegEncContext *s);
703
void MPV_common_init_axp(MpegEncContext *s);
704
void MPV_common_init_mlib(MpegEncContext *s);
705
void MPV_common_init_mmi(MpegEncContext *s);
706
void MPV_common_init_armv4l(MpegEncContext *s);
707
void MPV_common_init_altivec(MpegEncContext *s);
708
extern void (*draw_edges)(uint8_t *buf, int wrap, int width, int height, int w);
709
void ff_clean_intra_table_entries(MpegEncContext *s);
710
void ff_init_scantable(uint8_t *, ScanTable *st, const uint8_t *src_scantable);
711
void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
712
void ff_emulated_edge_mc(uint8_t *buf, uint8_t *src, int linesize, int block_w, int block_h,
713
                                    int src_x, int src_y, int w, int h);
714
void ff_mpeg_flush(AVCodecContext *avctx);
715
void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
716
void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
717
int ff_find_unused_picture(MpegEncContext *s, int shared);
718
void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
719
void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
720
const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
721

    
722
void ff_er_frame_start(MpegEncContext *s);
723
void ff_er_frame_end(MpegEncContext *s);
724
void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
725

    
726
int ff_dct_common_init(MpegEncContext *s);
727
void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
728
                       const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
729

    
730
extern enum PixelFormat ff_yuv420p_list[2];
731

    
732
void ff_init_block_index(MpegEncContext *s);
733

    
734
static inline void ff_update_block_index(MpegEncContext *s){
735
    const int block_size= 8>>s->avctx->lowres;
736

    
737
    s->block_index[0]+=2;
738
    s->block_index[1]+=2;
739
    s->block_index[2]+=2;
740
    s->block_index[3]+=2;
741
    s->block_index[4]++;
742
    s->block_index[5]++;
743
    s->dest[0]+= 2*block_size;
744
    s->dest[1]+= block_size;
745
    s->dest[2]+= block_size;
746
}
747

    
748
static inline int get_bits_diff(MpegEncContext *s){
749
    const int bits= put_bits_count(&s->pb);
750
    const int last= s->last_bits;
751

    
752
    s->last_bits = bits;
753

    
754
    return bits - last;
755
}
756

    
757
static inline int ff_h263_round_chroma(int x){
758
    static const uint8_t h263_chroma_roundtab[16] = {
759
    //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
760
        0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
761
    };
762
    return h263_chroma_roundtab[x & 0xf] + (x >> 3);
763
}
764

    
765
/* motion_est.c */
766
void ff_estimate_p_frame_motion(MpegEncContext * s,
767
                             int mb_x, int mb_y);
768
void ff_estimate_b_frame_motion(MpegEncContext * s,
769
                             int mb_x, int mb_y);
770
int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
771
void ff_fix_long_p_mvs(MpegEncContext * s);
772
void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
773
                     int16_t (*mv_table)[2], int f_code, int type, int truncate);
774
void ff_init_me(MpegEncContext *s);
775
int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
776
inline int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
777
                             int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
778
                             int ref_mv_scale, int size, int h);
779
inline int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
780
                               int ref_index, int size, int h, int add_rate);
781

    
782
/* mpeg12.c */
783
extern const uint16_t ff_mpeg1_default_intra_matrix[64];
784
extern const uint16_t ff_mpeg1_default_non_intra_matrix[64];
785
extern const uint8_t ff_mpeg1_dc_scale_table[128];
786
extern const AVRational ff_frame_rate_tab[];
787

    
788
void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
789
void mpeg1_encode_mb(MpegEncContext *s,
790
                     DCTELEM block[6][64],
791
                     int motion_x, int motion_y);
792
void ff_mpeg1_encode_init(MpegEncContext *s);
793
void ff_mpeg1_encode_slice_header(MpegEncContext *s);
794
void ff_mpeg1_clean_buffers(MpegEncContext *s);
795
int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
796

    
797
#include "rl.h"
798

    
799
extern const uint8_t ff_mpeg4_y_dc_scale_table[32];
800
extern const uint8_t ff_mpeg4_c_dc_scale_table[32];
801
extern const uint8_t ff_aic_dc_scale_table[32];
802
extern const int16_t ff_mpeg4_default_intra_matrix[64];
803
extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
804
extern const uint8_t ff_h263_chroma_qscale_table[32];
805
extern const uint8_t ff_h263_loop_filter_strength[32];
806

    
807
/* h261.c */
808
void ff_h261_loop_filter(MpegEncContext *s);
809
void ff_h261_reorder_mb_index(MpegEncContext* s);
810
void ff_h261_encode_mb(MpegEncContext *s,
811
                    DCTELEM block[6][64],
812
                    int motion_x, int motion_y);
813
void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
814
void ff_h261_encode_init(MpegEncContext *s);
815
int ff_h261_get_picture_format(int width, int height);
816

    
817

    
818
/* h263.c, h263dec.c */
819
int ff_h263_decode_init(AVCodecContext *avctx);
820
int ff_h263_decode_frame(AVCodecContext *avctx,
821
                             void *data, int *data_size,
822
                             uint8_t *buf, int buf_size);
823
int ff_h263_decode_end(AVCodecContext *avctx);
824
void h263_encode_mb(MpegEncContext *s,
825
                    DCTELEM block[6][64],
826
                    int motion_x, int motion_y);
827
void mpeg4_encode_mb(MpegEncContext *s,
828
                    DCTELEM block[6][64],
829
                    int motion_x, int motion_y);
830
void h263_encode_picture_header(MpegEncContext *s, int picture_number);
831
void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number);
832
void h263_encode_gob_header(MpegEncContext * s, int mb_line);
833
int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir,
834
                        int *px, int *py);
835
void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
836
                   int dir);
837
void ff_set_mpeg4_time(MpegEncContext * s);
838
void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
839
void h263_encode_init(MpegEncContext *s);
840
void h263_decode_init_vlc(MpegEncContext *s);
841
int h263_decode_picture_header(MpegEncContext *s);
842
int ff_h263_decode_gob_header(MpegEncContext *s);
843
int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
844
void ff_h263_update_motion_val(MpegEncContext * s);
845
void ff_h263_loop_filter(MpegEncContext * s);
846
void ff_set_qscale(MpegEncContext * s, int qscale);
847
int ff_h263_decode_mba(MpegEncContext *s);
848
void ff_h263_encode_mba(MpegEncContext *s);
849

    
850
int intel_h263_decode_picture_header(MpegEncContext *s);
851
int flv_h263_decode_picture_header(MpegEncContext *s);
852
int ff_h263_decode_mb(MpegEncContext *s,
853
                      DCTELEM block[6][64]);
854
int ff_mpeg4_decode_mb(MpegEncContext *s,
855
                      DCTELEM block[6][64]);
856
int h263_get_picture_format(int width, int height);
857
void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
858
void ff_mpeg4_clean_buffers(MpegEncContext *s);
859
void ff_mpeg4_stuffing(PutBitContext * pbc);
860
void ff_mpeg4_init_partitions(MpegEncContext *s);
861
void ff_mpeg4_merge_partitions(MpegEncContext *s);
862
void ff_clean_mpeg4_qscales(MpegEncContext *s);
863
void ff_clean_h263_qscales(MpegEncContext *s);
864
int ff_mpeg4_decode_partitions(MpegEncContext *s);
865
int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
866
int ff_h263_resync(MpegEncContext *s);
867
int ff_h263_get_gob_height(MpegEncContext *s);
868
void ff_mpeg4_init_direct_mv(MpegEncContext *s);
869
int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
870
void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
871

    
872

    
873
/* rv10.c */
874
void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
875
int rv_decode_dc(MpegEncContext *s, int n);
876
void rv20_encode_picture_header(MpegEncContext *s, int picture_number);
877

    
878

    
879
/* msmpeg4.c */
880
void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
881
void msmpeg4_encode_ext_header(MpegEncContext * s);
882
void msmpeg4_encode_mb(MpegEncContext * s,
883
                       DCTELEM block[6][64],
884
                       int motion_x, int motion_y);
885
int msmpeg4_decode_picture_header(MpegEncContext * s);
886
int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
887
int ff_msmpeg4_decode_init(MpegEncContext *s);
888
void ff_msmpeg4_encode_init(MpegEncContext *s);
889
int ff_wmv2_decode_picture_header(MpegEncContext * s);
890
int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
891
void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
892
void ff_mspel_motion(MpegEncContext *s,
893
                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
894
                               uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
895
                               int motion_x, int motion_y, int h);
896
int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
897
void ff_wmv2_encode_mb(MpegEncContext * s,
898
                       DCTELEM block[6][64],
899
                       int motion_x, int motion_y);
900

    
901
#endif /* FFMPEG_MPEGVIDEO_H */
902