PeerStreamer

/*

 * Generic DCT based hybrid video encoder

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

 *

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

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

 * License as published by the Free Software Foundation; either

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

 *

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

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

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

 * Lesser General Public License for more details.

 *

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

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

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

 */

/**

 * @file mpegvideo.h

 * mpegvideo header.

 */

#ifndef AVCODEC_MPEGVIDEO_H

#define AVCODEC_MPEGVIDEO_H

#include "dsputil.h"

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

enum OutputFormat {

    FMT_MPEG1,

    FMT_H263,

    FMT_MJPEG, 

};

#define EDGE_WIDTH 16

#define MPEG_BUF_SIZE (16 * 1024)

#define QMAT_SHIFT_MMX 16

#define QMAT_SHIFT 22

#define MAX_FCODE 7

#define MAX_MV 2048

#define MAX_PICTURE_COUNT 15

#define ME_MAP_SIZE 64

#define ME_MAP_SHIFT 3

#define ME_MAP_MV_BITS 11

/* run length table */

#define MAX_RUN    64

#define MAX_LEVEL  64

#define I_TYPE FF_I_TYPE  // Intra

#define P_TYPE FF_P_TYPE  // Predicted

#define B_TYPE FF_B_TYPE  // Bi-dir predicted

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

typedef struct Predictor{

    double coeff;

    double count;

    double decay;

} Predictor;

typedef struct RateControlEntry{

    int pict_type;

    float qscale;

    int mv_bits;

    int i_tex_bits;

    int p_tex_bits;

    int misc_bits;

    uint64_t expected_bits;

    int new_pict_type;

    float new_qscale;

    int mc_mb_var_sum;

    int mb_var_sum;

    int i_count;

    int f_code;

    int b_code;

}RateControlEntry;

typedef struct RateControlContext{

    FILE *stats_file;

    int num_entries;          /* number of RateControlEntries */

    RateControlEntry *entry;

    int buffer_index;         /* amount of bits in the video/audio buffer */

    Predictor pred[5];

    double short_term_qsum;   /* sum of recent qscales */

    double short_term_qcount; /* count of recent qscales */

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

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

    double last_qscale;

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

    int last_mc_mb_var_sum;

    int last_mb_var_sum;

    uint64_t i_cplx_sum[5];

    uint64_t p_cplx_sum[5];

    uint64_t mv_bits_sum[5];

    uint64_t qscale_sum[5];

    int frame_count[5];

    int last_non_b_pict_type;

}RateControlContext;

typedef struct ScanTable{

    const uint8_t *scantable;

    uint8_t permutated[64];

    uint8_t raster_end[64];

#ifdef ARCH_POWERPC

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

    uint8_t __align8 inverse[64];

#endif

} ScanTable;

typedef struct Picture{

    FF_COMMON_FRAME

    int mb_var_sum;             /* sum of MB variance for current frame */

    int mc_mb_var_sum;          /* motion compensated MB variance for current frame */

    uint16_t *mb_var;           /* Table for MB variances */

    uint16_t *mc_mb_var;        /* Table for motion compensated MB variances */

    uint8_t *mb_mean;           /* Table for MB luminance */

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

    int b_frame_score;          /* */

} Picture;

typedef struct ParseContext{

    uint8_t *buffer;

    int index;

    int last_index;

    int buffer_size;

    int state;

    int frame_start_found;

} ParseContext;

struct MpegEncContext;

typedef struct MotionEstContext{

    int skip;                          /* set if ME is skiped for the current MB */

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

    int direct_basis_mv[4][2];

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

    uint32_t *map;                     /* map to avoid duplicate evaluations */

    uint32_t *score_map;               /* map to store the scores */

    int map_generation;  

    int pre_penalty_factor;

    int penalty_factor;

    int sub_penalty_factor;

    int mb_penalty_factor;

    int pre_pass;                      /* = 1 for the pre pass */

    int dia_size;

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

    int (*sub_motion_search)(struct MpegEncContext * s,

                                  int *mx_ptr, int *my_ptr, int dmin,

                                  int xmin, int ymin, int xmax, int ymax,

                                  int pred_x, int pred_y, Picture *ref_picture, 

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

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

                             int *mx_ptr, int *my_ptr,

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

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

                             int ref_mv_scale, uint16_t * const mv_penalty);

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

                             int *mx_ptr, int *my_ptr,

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

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

                             int ref_mv_scale, uint16_t * const mv_penalty);

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

                                  uint16_t * const mv_penalty);

}MotionEstContext;

typedef struct MpegEncContext {

    struct AVCodecContext *avctx;

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

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

    int gop_size;

    int frame_rate; /* number of frames per second */

    int intra_only; /* if true, only intra pictures are generated */

    int bit_rate;        /* wanted bit rate */

    int bit_rate_tolerance; /* amount of +- bits (>0)*/

    enum OutputFormat out_format; /* output format */

    int h263_pred;    /* use mpeg4/h263 ac/dc predictions */

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

    int h263_plus; /* h263 plus headers */

    int h263_rv10; /* use RV10 variation for H263 */

    int h263_msmpeg4; /* generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)*/

    int h263_intel; /* use I263 intel h263 header */

    int codec_id;     /* see CODEC_ID_xxx */

    int fixed_qscale; /* fixed qscale if non zero */

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

    float qblur;      /* amount of qscale smoothing over time (0.0-1.0) */

    int qmin;         /* min qscale */

    int qmax;         /* max qscale */

    int max_qdiff;    /* max qscale difference between frames */

    int encoding;     /* true if we are encoding (vs decoding) */

    int flags;        /* AVCodecContext.flags (HQ, MV4, ...) */

    int max_b_frames; /* max number of b-frames for encoding */

    int b_frame_strategy;

    int luma_elim_threshold;

    int chroma_elim_threshold;

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

    int workaround_bugs;       /* workaround bugs in encoders which cannot be detected automatically */

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

    /* bit output */

    PutBitContext pb;

    /* sequence parameters */

    int context_initialized;

    int input_picture_number;

    int picture_number;

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

    int b_frames_since_non_b;  /* used for encoding, relative to not yet reordered input */

    int mb_width, mb_height;   /* number of MBs horizontally & vertically */

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

    int mb_num;                /* number of MBs of a picture */

    int linesize;              /* line size, in bytes, may be different from width */

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

    Picture picture[MAX_PICTURE_COUNT]; /* main picture buffer */

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

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

    Picture last_picture;       /* previous picture */

    Picture next_picture;       /* previous picture (for bidir pred) */

    Picture new_picture;        /* source picture for encoding */

    Picture current_picture;    /* buffer to store the decompressed current picture */

    int last_dc[3];              /* last DC values for MPEG1 */

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

    int y_dc_scale, c_dc_scale;

    uint8_t *y_dc_scale_table;     /* qscale -> y_dc_scale table */

    uint8_t *c_dc_scale_table;     /* qscale -> c_dc_scale table */

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

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

    int ac_pred;

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

#define PREV_PICT_TYPES_BUFFER_SIZE 256

    int mb_skiped;              /* MUST BE SET only during DECODING */

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

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

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

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

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

    uint8_t *allocated_edge_emu_buffer;

    uint8_t *edge_emu_buffer;     /* points into the middle of allocated_edge_emu_buffer */ 

    int qscale;                 /* QP */

    float frame_qscale;         /* qscale from the frame level rc FIXME remove*/

    int adaptive_quant;         /* use adaptive quantization */

    int dquant;                 /* qscale difference to prev qscale */ 

    int pict_type;              /* I_TYPE, P_TYPE, B_TYPE, ... */

    int last_pict_type;

    int last_non_b_pict_type;   /* used for mpeg4 gmc b-frames & ratecontrol */

    int frame_rate_index;

    /* motion compensation */

    int unrestricted_mv;          /* mv can point outside of the coded picture */

    int h263_long_vectors; /* use horrible h263v1 long vector mode */

    DSPContext dsp;             /* pointers for accelerated dsp fucntions */

    int f_code; /* forward MV resolution */

    int b_code; /* backward MV resolution for B Frames (mpeg4) */

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

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

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

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

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

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

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

    int me_method;                     /* ME algorithm */

    int scene_change_score;

    int mv_dir;

#define MV_DIR_BACKWARD  1

#define MV_DIR_FORWARD   2

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

    int mv_type;

#define MV_TYPE_16X16       0   /* 1 vector for the whole mb */

#define MV_TYPE_8X8         1   /* 4 vectors (h263, mpeg4 4MV) */

#define MV_TYPE_16X8        2   /* 2 vectors, one per 16x8 block */ 

#define MV_TYPE_FIELD       3   /* 2 vectors, one per field */ 

#define MV_TYPE_DMV         4   /* 2 vectors, special mpeg2 Dual Prime Vectors */

    /* motion vectors for a macroblock 

       first coordinate : 0 = forward 1 = backward

       second "         : depend on type

       third  "         : 0 = x, 1 = y

    */

    int mv[2][4][2];

    int field_select[2][2];

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

    uint8_t *fcode_tab; /* smallest fcode needed for each MV */

    MotionEstContext me;

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

                        for b-frames rounding mode is allways 0 */

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

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

    /* macroblock layer */

    int mb_x, mb_y;

    int mb_incr;

    int mb_intra;

    uint8_t *mb_type;       /* Table for MB type */

#define MB_TYPE_INTRA    0x01

#define MB_TYPE_INTER    0x02

#define MB_TYPE_INTER4V  0x04

#define MB_TYPE_SKIPED   0x08

#define MB_TYPE_GMC      0x10

#define MB_TYPE_DIRECT   0x10

#define MB_TYPE_FORWARD  0x20

#define MB_TYPE_BACKWARD 0x40

#define MB_TYPE_BIDIR    0x80

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

    int block_wrap[6];

    /* matrix transmitted in the bitstream */

    uint16_t intra_matrix[64];

    uint16_t chroma_intra_matrix[64];

    uint16_t inter_matrix[64];

    uint16_t chroma_inter_matrix[64];

#define QUANT_BIAS_SHIFT 4

    int intra_quant_bias;    /* bias for the quantizer */

    int inter_quant_bias;    /* bias for the quantizer */

    int min_qcoeff;          /* minimum encodable coefficient */

    int max_qcoeff;          /* maximum encodable coefficient */

    int ac_esc_length;       /* num of bits needed to encode the longest esc */

    uint8_t *intra_ac_vlc_length;

    uint8_t *intra_ac_vlc_last_length;

    uint8_t *inter_ac_vlc_length;

    uint8_t *inter_ac_vlc_last_length;

    uint8_t *luma_dc_vlc_length;

    uint8_t *chroma_dc_vlc_length;

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

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

    int __align8 q_intra_matrix[32][64];

    int __align8 q_inter_matrix[32][64];

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

    uint16_t __align8 q_intra_matrix16[32][64];

    uint16_t __align8 q_inter_matrix16[32][64];

    uint16_t __align8 q_intra_matrix16_bias[32][64];

    uint16_t __align8 q_inter_matrix16_bias[32][64];

    int block_last_index[6];  /* last non zero coefficient in block */

    /* scantables */

    ScanTable __align8 intra_scantable;

    ScanTable intra_h_scantable;

    ScanTable intra_v_scantable;

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

    void *opaque; /* private data for the user */

    /* bit rate control */

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

    int64_t wanted_bits;

    int64_t total_bits;

    int frame_bits;        /* bits used for the current frame */

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

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

    int mv_bits;

    int header_bits;

    int i_tex_bits;

    int p_tex_bits;

    int i_count;

    int f_count;

    int b_count;

    int skip_count;

    int misc_bits; // cbp, mb_type

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

    /* error concealment / resync */

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

#define VP_START            1        /* current MB is the first after a resync marker */

#define AC_ERROR            2

#define DC_ERROR            4

#define MV_ERROR            8

#define AC_END              16

#define DC_END              32

#define MV_END              64

//FIXME some prefix?

    int resync_mb_x;                 /* x position of last resync marker */

    int resync_mb_y;                 /* y position of last resync marker */

    GetBitContext last_resync_gb;    /* used to search for the next resync marker */

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

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

    int error_resilience;

    ParseContext parse_context;

    /* H.263 specific */

    int gob_number;

    int gob_index;

    /* H.263+ specific */

    int umvplus;                    /* == H263+ && unrestricted_mv */

    int h263_aic; /* Advanded INTRA Coding (AIC) */

    int h263_aic_dir; /* AIC direction: 0 = left, 1 = top */

    /* mpeg4 specific */

    int time_increment_resolution;

    int time_increment_bits;        /* number of bits to represent the fractional part of time */

    int last_time_base;

    int time_base;                  /* time in seconds of last I,P,S Frame */

    int64_t time;                   /* time of current frame */ 

    int64_t last_non_b_time;

    uint16_t pp_time;               /* time distance between the last 2 p,s,i frames */

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

    uint16_t pp_field_time;

    uint16_t pb_field_time;         /* like above, just for interlaced */

    int shape;

    int vol_sprite_usage;

    int sprite_width;

    int sprite_height;

    int sprite_left;

    int sprite_top;

    int sprite_brightness_change;

    int num_sprite_warping_points;

    int real_sprite_warping_points;

    int sprite_offset[2][2];         /* sprite offset[isChroma][isMVY] */

    int sprite_delta[2][2];          /* sprite_delta [isY][isMVY] */ 

    int sprite_shift[2];             /* sprite shift [isChroma] */

    int mcsel;

    int quant_precision;

    int quarter_sample;              /* 1->qpel, 0->half pel ME/MC */ 

    int scalability;

    int hierachy_type;

    int enhancement_type;

    int new_pred;

    int reduced_res_vop;

    int aspect_ratio_info;

    int aspected_width;

    int aspected_height;

    int sprite_warping_accuracy;

    int low_latency_sprite;

    int data_partitioning;           /* data partitioning flag from header */

    int partitioned_frame;           /* is current frame partitioned */

    int rvlc;                        /* reversible vlc */

    int resync_marker;               /* could this stream contain resync markers*/

    int low_delay;                   /* no reordering needed / has no b-frames */

    int vo_type;

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

    PutBitContext tex_pb;            /* used for data partitioned VOPs */

    PutBitContext pb2;               /* used for data partitioned VOPs */

#define PB_BUFFER_SIZE 1024*256

    uint8_t *tex_pb_buffer;          

    uint8_t *pb2_buffer;

    int mpeg_quant;

#define CO_LOCATED_TYPE_4MV     1

#define CO_LOCATED_TYPE_FIELDMV 2

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

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

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

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

    int padding_bug_score;           /* used to detect the VERY common padding bug in MPEG4 */

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

    int divx_version;

    int divx_build;

#define BITSTREAM_BUFFER_SIZE 1024*256

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

    int bitstream_buffer_size;

    int xvid_build;

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

    int ffmpeg_version;

    int lavc_build;

    /* RV10 specific */

    int rv10_version; /* RV10 version: 0 or 3 */

    int rv10_first_dc_coded[3];

    /* MJPEG specific */

    struct MJpegContext *mjpeg_ctx;

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

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

    int mjpeg_write_tables; /* do we want to have quantisation- and

                               huffmantables in the jpeg file ? */

    int mjpeg_data_only_frames; /* frames only with SOI, SOS and EOI markers */

    /* MSMPEG4 specific */

    int mv_table_index;

    int rl_table_index;

    int rl_chroma_table_index;

    int dc_table_index;

    int use_skip_mb_code;

    int slice_height;      /* in macroblocks */

    int first_slice_line;  /* used in mpeg4 too to handle resync markers */

    int flipflop_rounding;

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

    int per_mb_rl_table;

    int esc3_level_length;

    int esc3_run_length;

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

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

    int inter_intra_pred;

    int mspel;

    /* decompression specific */

    GetBitContext gb;

    /* Mpeg1 specific */

    int fake_picture_number; /* picture number at the bitstream frame rate */

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

    int last_mv_dir;         /* last mv_dir, used for b frame encoding */

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

    int progressive_sequence;

    int mpeg_f_code[2][2];

    int picture_structure;

/* picture type */

#define PICT_TOP_FIELD     1

#define PICT_BOTTOM_FIELD  2

#define PICT_FRAME         3

    int intra_dc_precision;

    int frame_pred_frame_dct;

    int top_field_first;

    int concealment_motion_vectors;

    int q_scale_type;

    int intra_vlc_format;

    int alternate_scan;

    int repeat_first_field;

    int chroma_420_type;

    int progressive_frame;

    int mpeg2;

    int full_pel[2];

    int interlaced_dct;

    int first_slice;

    int first_field;

    /* RTP specific */

    /* These are explained on avcodec.h */

    int rtp_mode;

    int rtp_payload_size;

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

    uint8_t *ptr_lastgob;

    uint8_t *ptr_last_mb_line;

    uint32_t mb_line_avgsize;

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

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

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

#define SLICE_OK         0

#define SLICE_ERROR     -1

#define SLICE_END       -2 //end marker found

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

    void (*dct_unquantize_mpeg1)(struct MpegEncContext *s, 

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

    void (*dct_unquantize_mpeg2)(struct MpegEncContext *s, 

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

    void (*dct_unquantize_h263)(struct MpegEncContext *s, 

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

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

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

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

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

} MpegEncContext;

int DCT_common_init(MpegEncContext *s);

int MPV_common_init(MpegEncContext *s);

void MPV_common_end(MpegEncContext *s);

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

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

void MPV_frame_end(MpegEncContext *s);

int MPV_encode_init(AVCodecContext *avctx);

int MPV_encode_end(AVCodecContext *avctx);

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

#ifdef HAVE_MMX

void MPV_common_init_mmx(MpegEncContext *s);

#endif

#ifdef ARCH_ALPHA

void MPV_common_init_axp(MpegEncContext *s);

#endif

#ifdef HAVE_MLIB

void MPV_common_init_mlib(MpegEncContext *s);

#endif

#ifdef HAVE_MMI

void MPV_common_init_mmi(MpegEncContext *s);

#endif

#ifdef ARCH_ARMV4L

void MPV_common_init_armv4l(MpegEncContext *s);

#endif

#ifdef ARCH_POWERPC

void MPV_common_init_ppc(MpegEncContext *s);

#endif

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

void ff_conceal_past_errors(MpegEncContext *s, int conceal_all);

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

void ff_clean_intra_table_entries(MpegEncContext *s);

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

void ff_error_resilience(MpegEncContext *s);

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

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

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

char ff_get_pict_type_char(int pict_type);

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

extern enum PixelFormat ff_yuv420p_list[2];

static inline void ff_init_block_index(MpegEncContext *s){

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

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

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

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

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

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

}

static inline void ff_update_block_index(MpegEncContext *s){

    s->block_index[0]+=2;

    s->block_index[1]+=2;

    s->block_index[2]+=2;

    s->block_index[3]+=2;

    s->block_index[4]++;

    s->block_index[5]++;

}

/* motion_est.c */

void ff_estimate_p_frame_motion(MpegEncContext * s,

                             int mb_x, int mb_y);

void ff_estimate_b_frame_motion(MpegEncContext * s,

                             int mb_x, int mb_y);

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

void ff_fix_long_p_mvs(MpegEncContext * s);

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

void ff_init_me(MpegEncContext *s);

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

/* mpeg12.c */

extern const int16_t ff_mpeg1_default_intra_matrix[64];

extern const int16_t ff_mpeg1_default_non_intra_matrix[64];

extern uint8_t ff_mpeg1_dc_scale_table[128];

void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);

void mpeg1_encode_mb(MpegEncContext *s,

                     DCTELEM block[6][64],

                     int motion_x, int motion_y);

void ff_mpeg1_encode_init(MpegEncContext *s);

/* h263enc.c */

typedef struct RLTable {

    int n; /* number of entries of table_vlc minus 1 */

    int last; /* number of values for last = 0 */

    const uint16_t (*table_vlc)[2];

    const int8_t *table_run;

    const int8_t *table_level;

    uint8_t *index_run[2]; /* encoding only */

    int8_t *max_level[2]; /* encoding & decoding */

    int8_t *max_run[2];   /* encoding & decoding */

    VLC vlc;            /* decoding only deprected FIXME remove*/

    RL_VLC_ELEM *rl_vlc[32]; /* decoding only */

} RLTable;

void init_rl(RLTable *rl);

void init_vlc_rl(RLTable *rl);

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

{

    int index;

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

    if (index >= rl->n)

        return rl->n;

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

        return rl->n;

    return index + level - 1;

}

extern uint8_t ff_mpeg4_y_dc_scale_table[32];

extern uint8_t ff_mpeg4_c_dc_scale_table[32];

extern const int16_t ff_mpeg4_default_intra_matrix[64];

extern const int16_t ff_mpeg4_default_non_intra_matrix[64];

int ff_h263_decode_init(AVCodecContext *avctx);

int ff_h263_decode_frame(AVCodecContext *avctx, 

                             void *data, int *data_size,

                             uint8_t *buf, int buf_size);

int ff_h263_decode_end(AVCodecContext *avctx);

void h263_encode_mb(MpegEncContext *s, 

                    DCTELEM block[6][64],

                    int motion_x, int motion_y);

void mpeg4_encode_mb(MpegEncContext *s, 

                    DCTELEM block[6][64],

                    int motion_x, int motion_y);

void h263_encode_picture_header(MpegEncContext *s, int picture_number);

int h263_encode_gob_header(MpegEncContext * s, int mb_line);

int16_t *h263_pred_motion(MpegEncContext * s, int block, 

                        int *px, int *py);

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

                   int dir);

void ff_set_mpeg4_time(MpegEncContext * s, int picture_number);

void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);

void h263_encode_init(MpegEncContext *s);

void h263_decode_init_vlc(MpegEncContext *s);

int h263_decode_picture_header(MpegEncContext *s);

int ff_h263_decode_gob_header(MpegEncContext *s);

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

int intel_h263_decode_picture_header(MpegEncContext *s);

int ff_h263_decode_mb(MpegEncContext *s,

                      DCTELEM block[6][64]);

int h263_get_picture_format(int width, int height);

void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);

void ff_mpeg4_clean_buffers(MpegEncContext *s);

void ff_mpeg4_stuffing(PutBitContext * pbc);

void ff_mpeg4_init_partitions(MpegEncContext *s);

void ff_mpeg4_merge_partitions(MpegEncContext *s);

void ff_clean_mpeg4_qscales(MpegEncContext *s);

void ff_clean_h263_qscales(MpegEncContext *s);

int ff_mpeg4_decode_partitions(MpegEncContext *s);

int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);

int ff_h263_resync(MpegEncContext *s);

int ff_h263_get_gob_height(MpegEncContext *s);

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

inline int ff_h263_round_chroma(int x);

/* rv10.c */

void rv10_encode_picture_header(MpegEncContext *s, int picture_number);

int rv_decode_dc(MpegEncContext *s, int n);

/* msmpeg4.c */

void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);

void msmpeg4_encode_ext_header(MpegEncContext * s);

void msmpeg4_encode_mb(MpegEncContext * s, 

                       DCTELEM block[6][64],

                       int motion_x, int motion_y);

int msmpeg4_decode_picture_header(MpegEncContext * s);

int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);

int ff_msmpeg4_decode_init(MpegEncContext *s);

void ff_msmpeg4_encode_init(MpegEncContext *s);

int ff_wmv2_decode_picture_header(MpegEncContext * s);

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

void ff_mspel_motion(MpegEncContext *s,

                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,

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

                               int motion_x, int motion_y, int h);

int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);

void ff_wmv2_encode_mb(MpegEncContext * s, 

                       DCTELEM block[6][64],

                       int motion_x, int motion_y);

/* mjpegenc.c */

int mjpeg_init(MpegEncContext *s);

void mjpeg_close(MpegEncContext *s);

void mjpeg_encode_mb(MpegEncContext *s, 

                     DCTELEM block[6][64]);

void mjpeg_picture_header(MpegEncContext *s);

void mjpeg_picture_trailer(MpegEncContext *s);

/* rate control */

int ff_rate_control_init(MpegEncContext *s);

float ff_rate_estimate_qscale(MpegEncContext *s);

void ff_write_pass1_stats(MpegEncContext *s);

void ff_rate_control_uninit(MpegEncContext *s);

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

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

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

               void *opaque);

#endif /* AVCODEC_MPEGVIDEO_H */