libavcodec/mpegvideo.h

   1 /*
   2  * Generic DCT based hybrid video encoder
   3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
   4  * Copyright (c) 2002-2004 Michael Niedermayer
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 /**
  22  * @file mpegvideo.h
  23  * mpegvideo header.
  24  */
  25
  26 #ifndef AVCODEC_MPEGVIDEO_H
  27 #define AVCODEC_MPEGVIDEO_H
  28
  29 #include "dsputil.h"
  30
  31 #define FRAME_SKIPED 100 ///< return value for header parsers if frame is not coded
  32
  33 enum OutputFormat {
  34     FMT_MPEG1,
  35     FMT_H261,
  36     FMT_H263,
  37     FMT_MJPEG,
  38     FMT_H264,
  39 };
  40
  41 #define EDGE_WIDTH 16
  42
  43 #define MPEG_BUF_SIZE (16 * 1024)
  44
  45 #define QMAT_SHIFT_MMX 16
  46 #define QMAT_SHIFT 22
  47
  48 #define MAX_FCODE 7
  49 #define MAX_MV 2048
  50
  51 #define MAX_THREADS 8
  52
  53 #define MAX_PICTURE_COUNT 32
  54
  55 #define ME_MAP_SIZE 64
  56 #define ME_MAP_SHIFT 3
  57 #define ME_MAP_MV_BITS 11
  58
  59 /* run length table */
  60 #define MAX_RUN    64
  61 #define MAX_LEVEL  64
  62
  63 #define I_TYPE FF_I_TYPE  ///< Intra
  64 #define P_TYPE FF_P_TYPE  ///< Predicted
  65 #define B_TYPE FF_B_TYPE  ///< Bi-dir predicted
  66 #define S_TYPE FF_S_TYPE  ///< S(GMC)-VOP MPEG4
  67 #define SI_TYPE FF_SI_TYPE  ///< Switching Intra
  68 #define SP_TYPE FF_SP_TYPE  ///< Switching Predicted
  69
  70 typedef struct Predictor{
  71     double coeff;
  72     double count;
  73     double decay;
  74 } Predictor;
  75
  76 typedef struct RateControlEntry{
  77     int pict_type;
  78     float qscale;
  79     int mv_bits;
  80     int i_tex_bits;
  81     int p_tex_bits;
  82     int misc_bits;
  83     uint64_t expected_bits;
  84     int new_pict_type;
  85     float new_qscale;
  86     int mc_mb_var_sum;
  87     int mb_var_sum;
  88     int i_count;
  89     int f_code;
  90     int b_code;
  91 }RateControlEntry;
  92
  93 /**
  94  * rate control context.
  95  */
  96 typedef struct RateControlContext{
  97     FILE *stats_file;
  98     int num_entries;              ///< number of RateControlEntries
  99     RateControlEntry *entry;
 100     double buffer_index;          ///< amount of bits in the video/audio buffer
 101     Predictor pred[5];
 102     double short_term_qsum;       ///< sum of recent qscales
 103     double short_term_qcount;     ///< count of recent qscales
 104     double pass1_rc_eq_output_sum;///< sum of the output of the rc equation, this is used for normalization
 105     double pass1_wanted_bits;     ///< bits which should have been outputed by the pass1 code (including complexity init)
 106     double last_qscale;
 107     double last_qscale_for[5];    ///< last qscale for a specific pict type, used for max_diff & ipb factor stuff
 108     int last_mc_mb_var_sum;
 109     int last_mb_var_sum;
 110     uint64_t i_cplx_sum[5];
 111     uint64_t p_cplx_sum[5];
 112     uint64_t mv_bits_sum[5];
 113     uint64_t qscale_sum[5];
 114     int frame_count[5];
 115     int last_non_b_pict_type;
 116 }RateControlContext;
 117
 118 /**
 119  * Scantable.
 120  */
 121 typedef struct ScanTable{
 122     const uint8_t *scantable;
 123     uint8_t permutated[64];
 124     uint8_t raster_end[64];
 125 #ifdef ARCH_POWERPC
 126                 /** Used by dct_quantise_alitvec to find last-non-zero */
 127     uint8_t __align8 inverse[64];
 128 #endif
 129 } ScanTable;
 130
 131 /**
 132  * Picture.
 133  */
 134 typedef struct Picture{
 135     FF_COMMON_FRAME
 136
 137     /**
 138      * halfpel luma planes.
 139      */
 140     uint8_t *interpolated[3];
 141     int16_t (*motion_val_base[2])[2];
 142     uint32_t *mb_type_base;
 143 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if theres just one type
 144 #define IS_INTRA4x4(a)   ((a)&MB_TYPE_INTRA4x4)
 145 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
 146 #define IS_PCM(a)        ((a)&MB_TYPE_INTRA_PCM)
 147 #define IS_INTRA(a)      ((a)&7)
 148 #define IS_INTER(a)      ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
 149 #define IS_SKIP(a)       ((a)&MB_TYPE_SKIP)
 150 #define IS_INTRA_PCM(a)  ((a)&MB_TYPE_INTRA_PCM)
 151 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
 152 #define IS_DIRECT(a)     ((a)&MB_TYPE_DIRECT2)
 153 #define IS_GMC(a)        ((a)&MB_TYPE_GMC)
 154 #define IS_16X16(a)      ((a)&MB_TYPE_16x16)
 155 #define IS_16X8(a)       ((a)&MB_TYPE_16x8)
 156 #define IS_8X16(a)       ((a)&MB_TYPE_8x16)
 157 #define IS_8X8(a)        ((a)&MB_TYPE_8x8)
 158 #define IS_SUB_8X8(a)    ((a)&MB_TYPE_16x16) //note reused
 159 #define IS_SUB_8X4(a)    ((a)&MB_TYPE_16x8)  //note reused
 160 #define IS_SUB_4X8(a)    ((a)&MB_TYPE_8x16)  //note reused
 161 #define IS_SUB_4X4(a)    ((a)&MB_TYPE_8x8)   //note reused
 162 #define IS_ACPRED(a)     ((a)&MB_TYPE_ACPRED)
 163 #define IS_QUANT(a)      ((a)&MB_TYPE_QUANT)
 164 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
 165 #define USES_LIST(a, list) ((a) & ((MB_TYPE_P0L0|MB_TYPE_P1L0)<<(2*(list)))) ///< does this mb use listX, note doesnt work if subMBs
 166 #define HAS_CBP(a)        ((a)&MB_TYPE_CBP)
 167
 168     int field_poc[2];           ///< h264 top/bottom POC
 169     int poc;                    ///< h264 frame POC
 170     int frame_num;              ///< h264 frame_num
 171     int pic_id;                 ///< h264 pic_num or long_term_pic_idx
 172     int long_ref;               ///< 1->long term reference 0->short term reference
 173
 174     int mb_var_sum;             ///< sum of MB variance for current frame
 175     int mc_mb_var_sum;          ///< motion compensated MB variance for current frame
 176     uint16_t *mb_var;           ///< Table for MB variances
 177     uint16_t *mc_mb_var;        ///< Table for motion compensated MB variances
 178     uint8_t *mb_mean;           ///< Table for MB luminance
 179     int32_t *mb_cmp_score;      ///< Table for MB cmp scores, for mb decission FIXME remove
 180     int b_frame_score;          /* */
 181 } Picture;
 182
 183 typedef struct ParseContext{
 184     uint8_t *buffer;
 185     int index;
 186     int last_index;
 187     int buffer_size;
 188     uint32_t state;             ///< contains the last few bytes in MSB order
 189     int frame_start_found;
 190     int overread;               ///< the number of bytes which where irreversibly read from the next frame
 191     int overread_index;         ///< the index into ParseContext.buffer of the overreaded bytes
 192 } ParseContext;
 193
 194 struct MpegEncContext;
 195
 196 /**
 197  * Motion estimation context.
 198  */
 199 typedef struct MotionEstContext{
 200     AVCodecContext *avctx;
 201     int skip;                          ///< set if ME is skiped for the current MB
 202     int co_located_mv[4][2];           ///< mv from last p frame for direct mode ME
 203     int direct_basis_mv[4][2];
 204     uint8_t *scratchpad;               ///< data area for the me algo, so that the ME doesnt need to malloc/free
 205     uint8_t *best_mb;
 206     uint8_t *temp_mb[2];
 207     uint8_t *temp;
 208     int best_bits;
 209     uint32_t *map;                     ///< map to avoid duplicate evaluations
 210     uint32_t *score_map;               ///< map to store the scores
 211     int map_generation;
 212     int pre_penalty_factor;
 213     int penalty_factor;
 214     int sub_penalty_factor;
 215     int mb_penalty_factor;
 216     int flags;
 217     int sub_flags;
 218     int mb_flags;
 219     int pre_pass;                      ///< = 1 for the pre pass
 220     int dia_size;
 221     int xmin;
 222     int xmax;
 223     int ymin;
 224     int ymax;
 225     int pred_x;
 226     int pred_y;
 227     uint8_t *src[4][4];
 228     uint8_t *ref[4][4];
 229     int stride;
 230     int uvstride;
 231     /* temp variables for picture complexity calculation */
 232     int mc_mb_var_sum_temp;
 233     int mb_var_sum_temp;
 234     int scene_change_score;
 235 /*    cmp, chroma_cmp;*/
 236     op_pixels_func (*hpel_put)[4];
 237     op_pixels_func (*hpel_avg)[4];
 238     qpel_mc_func (*qpel_put)[16];
 239     qpel_mc_func (*qpel_avg)[16];
 240     uint8_t (*mv_penalty)[MAX_MV*2+1];  ///< amount of bits needed to encode a MV
 241     uint8_t *current_mv_penalty;
 242     int (*sub_motion_search)(struct MpegEncContext * s,
 243                                   int *mx_ptr, int *my_ptr, int dmin,
 244                                   int src_index, int ref_index,
 245                                   int size, int h);
 246 }MotionEstContext;
 247
 248 /**
 249  * MpegEncContext.
 250  */
 251 typedef struct MpegEncContext {
 252     struct AVCodecContext *avctx;
 253     /* the following parameters must be initialized before encoding */
 254     int width, height;///< picture size. must be a multiple of 16
 255     int gop_size;
 256     int intra_only;   ///< if true, only intra pictures are generated
 257     int bit_rate;     ///< wanted bit rate
 258     enum OutputFormat out_format; ///< output format
 259     int h263_pred;    ///< use mpeg4/h263 ac/dc predictions
 260
 261 /* the following codec id fields are deprecated in favor of codec_id */
 262     int h263_plus;    ///< h263 plus headers
 263     int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
 264     int h263_flv;     ///< use flv h263 header
 265
 266     int codec_id;     /* see CODEC_ID_xxx */
 267     int fixed_qscale; ///< fixed qscale if non zero
 268     int encoding;     ///< true if we are encoding (vs decoding)
 269     int flags;        ///< AVCodecContext.flags (HQ, MV4, ...)
 270     int flags2;       ///< AVCodecContext.flags2
 271     int max_b_frames; ///< max number of b-frames for encoding
 272     int luma_elim_threshold;
 273     int chroma_elim_threshold;
 274     int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
 275     int workaround_bugs;       ///< workaround bugs in encoders which cannot be detected automatically
 276     /* the following fields are managed internally by the encoder */
 277
 278     /** bit output */
 279     PutBitContext pb;
 280
 281     /* sequence parameters */
 282     int context_initialized;
 283     int input_picture_number;  ///< used to set pic->display_picture_number, shouldnt be used for/by anything else
 284     int coded_picture_number;  ///< used to set pic->coded_picture_number, shouldnt be used for/by anything else
 285     int picture_number;       //FIXME remove, unclear definition
 286     int picture_in_gop_number; ///< 0-> first pic in gop, ...
 287     int b_frames_since_non_b;  ///< used for encoding, relative to not yet reordered input
 288     int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
 289     int mb_width, mb_height;   ///< number of MBs horizontally & vertically
 290     int mb_stride;             ///< mb_width+1 used for some arrays to allow simple addressng of left & top MBs withoutt sig11
 291     int b8_stride;             ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressng
 292     int b4_stride;             ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressng
 293     int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replicateion)
 294     int mb_num;                ///< number of MBs of a picture
 295     int linesize;              ///< line size, in bytes, may be different from width
 296     int uvlinesize;            ///< line size, for chroma in bytes, may be different from width
 297     Picture *picture;          ///< main picture buffer
 298     Picture **input_picture;   ///< next pictures on display order for encoding
 299     Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
 300
 301     int start_mb_y;            ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
 302     int end_mb_y;              ///< end   mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
 303     struct MpegEncContext *thread_context[MAX_THREADS];
 304
 305     /**
 306      * copy of the previous picture structure.
 307      * note, linesize & data, might not match the previous picture (for field pictures)
 308      */
 309     Picture last_picture;
 310
 311     /**
 312      * copy of the next picture structure.
 313      * note, linesize & data, might not match the next picture (for field pictures)
 314      */
 315     Picture next_picture;
 316
 317     /**
 318      * copy of the source picture structure for encoding.
 319      * note, linesize & data, might not match the source picture (for field pictures)
 320      */
 321     Picture new_picture;
 322
 323     /**
 324      * copy of the current picture structure.
 325      * note, linesize & data, might not match the current picture (for field pictures)
 326      */
 327     Picture current_picture;    ///< buffer to store the decompressed current picture
 328
 329     Picture *last_picture_ptr;     ///< pointer to the previous picture.
 330     Picture *next_picture_ptr;     ///< pointer to the next picture (for bidir pred)
 331     Picture *current_picture_ptr;  ///< pointer to the current picture
 332     uint8_t *visualization_buffer[3]; //< temporary buffer vor MV visualization
 333     int last_dc[3];                ///< last DC values for MPEG1
 334     int16_t *dc_val_base;
 335     int16_t *dc_val[3];            ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
 336     int16_t dc_cache[4*5];
 337     int y_dc_scale, c_dc_scale;
 338     uint8_t *y_dc_scale_table;     ///< qscale -> y_dc_scale table
 339     uint8_t *c_dc_scale_table;     ///< qscale -> c_dc_scale table
 340     const uint8_t *chroma_qscale_table;  ///< qscale -> chroma_qscale (h263)
 341     uint8_t *coded_block_base;
 342     uint8_t *coded_block;          ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
 343     int16_t (*ac_val_base)[16];
 344     int16_t (*ac_val[3])[16];      ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
 345     int ac_pred;
 346     uint8_t *prev_pict_types;     ///< previous picture types in bitstream order, used for mb skip
 347 #define PREV_PICT_TYPES_BUFFER_SIZE 256
 348     int mb_skiped;                ///< MUST BE SET only during DECODING
 349     uint8_t *mbskip_table;        /**< used to avoid copy if macroblock skipped (for black regions for example)
 350                                    and used for b-frame encoding & decoding (contains skip table of next P Frame) */
 351     uint8_t *mbintra_table;       ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
 352     uint8_t *cbp_table;           ///< used to store cbp, ac_pred for partitioned decoding
 353     uint8_t *pred_dir_table;      ///< used to store pred_dir for partitioned decoding
 354     uint8_t *allocated_edge_emu_buffer;
 355     uint8_t *edge_emu_buffer;     ///< points into the middle of allocated_edge_emu_buffer
 356     uint8_t *rd_scratchpad;       ///< scartchpad for rate distortion mb decission
 357     uint8_t *obmc_scratchpad;
 358     uint8_t *b_scratchpad;        ///< scratchpad used for writing into write only buffers
 359
 360     int qscale;                 ///< QP
 361     int chroma_qscale;          ///< chroma QP
 362     int lambda;                 ///< lagrange multipler used in rate distortion
 363     int lambda2;                ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
 364     int *lambda_table;
 365     int adaptive_quant;         ///< use adaptive quantization
 366     int dquant;                 ///< qscale difference to prev qscale
 367     int pict_type;              ///< I_TYPE, P_TYPE, B_TYPE, ...
 368     int last_pict_type; //FIXME removes
 369     int last_non_b_pict_type;   ///< used for mpeg4 gmc b-frames & ratecontrol
 370     int dropable;
 371     int frame_rate_index;
 372
 373     /* motion compensation */
 374     int unrestricted_mv;        ///< mv can point outside of the coded picture
 375     int h263_long_vectors;      ///< use horrible h263v1 long vector mode
 376     int decode;                 ///< if 0 then decoding will be skiped (for encoding b frames for example)
 377
 378     DSPContext dsp;             ///< pointers for accelerated dsp fucntions
 379     int f_code;                 ///< forward MV resolution
 380     int b_code;                 ///< backward MV resolution for B Frames (mpeg4)
 381     int16_t (*p_mv_table_base)[2];
 382     int16_t (*b_forw_mv_table_base)[2];
 383     int16_t (*b_back_mv_table_base)[2];
 384     int16_t (*b_bidir_forw_mv_table_base)[2];
 385     int16_t (*b_bidir_back_mv_table_base)[2];
 386     int16_t (*b_direct_mv_table_base)[2];
 387     int16_t (*p_field_mv_table_base[2][2])[2];
 388     int16_t (*b_field_mv_table_base[2][2][2])[2];
 389     int16_t (*p_mv_table)[2];            ///< MV table (1MV per MB) p-frame encoding
 390     int16_t (*b_forw_mv_table)[2];       ///< MV table (1MV per MB) forward mode b-frame encoding
 391     int16_t (*b_back_mv_table)[2];       ///< MV table (1MV per MB) backward mode b-frame encoding
 392     int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
 393     int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
 394     int16_t (*b_direct_mv_table)[2];     ///< MV table (1MV per MB) direct mode b-frame encoding
 395     int16_t (*p_field_mv_table[2][2])[2];   ///< MV table (2MV per MB) interlaced p-frame encoding
 396     int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
 397     uint8_t (*p_field_select_table[2]);
 398     uint8_t (*b_field_select_table[2][2]);
 399     int me_method;                       ///< ME algorithm
 400     int mv_dir;
 401 #define MV_DIR_BACKWARD  1
 402 #define MV_DIR_FORWARD   2
 403 #define MV_DIRECT        4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
 404     int mv_type;
 405 #define MV_TYPE_16X16       0   ///< 1 vector for the whole mb
 406 #define MV_TYPE_8X8         1   ///< 4 vectors (h263, mpeg4 4MV)
 407 #define MV_TYPE_16X8        2   ///< 2 vectors, one per 16x8 block
 408 #define MV_TYPE_FIELD       3   ///< 2 vectors, one per field
 409 #define MV_TYPE_DMV         4   ///< 2 vectors, special mpeg2 Dual Prime Vectors
 410     /**motion vectors for a macroblock
 411        first coordinate : 0 = forward 1 = backward
 412        second "         : depend on type
 413        third  "         : 0 = x, 1 = y
 414     */
 415     int mv[2][4][2];
 416     int field_select[2][2];
 417     int last_mv[2][2][2];             ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
 418     uint8_t *fcode_tab;               ///< smallest fcode needed for each MV
 419
 420     MotionEstContext me;
 421
 422     int no_rounding;  /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
 423                         for b-frames rounding mode is allways 0 */
 424
 425     int hurry_up;     /**< when set to 1 during decoding, b frames will be skiped
 426                          when set to 2 idct/dequant will be skipped too */
 427
 428     /* macroblock layer */
 429     int mb_x, mb_y;
 430     int mb_skip_run;
 431     int mb_intra;
 432     uint16_t *mb_type;           ///< Table for candidate MB types for encoding
 433 #define CANDIDATE_MB_TYPE_INTRA    0x01
 434 #define CANDIDATE_MB_TYPE_INTER    0x02
 435 #define CANDIDATE_MB_TYPE_INTER4V  0x04
 436 #define CANDIDATE_MB_TYPE_SKIPED   0x08
 437 //#define MB_TYPE_GMC      0x10
 438
 439 #define CANDIDATE_MB_TYPE_DIRECT   0x10
 440 #define CANDIDATE_MB_TYPE_FORWARD  0x20
 441 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
 442 #define CANDIDATE_MB_TYPE_BIDIR    0x80
 443
 444 #define CANDIDATE_MB_TYPE_INTER_I    0x100
 445 #define CANDIDATE_MB_TYPE_FORWARD_I  0x200
 446 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
 447 #define CANDIDATE_MB_TYPE_BIDIR_I    0x800
 448
 449     int block_index[6]; ///< index to current MB in block based arrays with edges
 450     int block_wrap[6];
 451     uint8_t *dest[3];
 452
 453     int *mb_index2xy;        ///< mb_index -> mb_x + mb_y*mb_stride
 454
 455     /** matrix transmitted in the bitstream */
 456     uint16_t intra_matrix[64];
 457     uint16_t chroma_intra_matrix[64];
 458     uint16_t inter_matrix[64];
 459     uint16_t chroma_inter_matrix[64];
 460 #define QUANT_BIAS_SHIFT 8
 461     int intra_quant_bias;    ///< bias for the quantizer
 462     int inter_quant_bias;    ///< bias for the quantizer
 463     int min_qcoeff;          ///< minimum encodable coefficient
 464     int max_qcoeff;          ///< maximum encodable coefficient
 465     int ac_esc_length;       ///< num of bits needed to encode the longest esc
 466     uint8_t *intra_ac_vlc_length;
 467     uint8_t *intra_ac_vlc_last_length;
 468     uint8_t *inter_ac_vlc_length;
 469     uint8_t *inter_ac_vlc_last_length;
 470     uint8_t *luma_dc_vlc_length;
 471     uint8_t *chroma_dc_vlc_length;
 472 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
 473
 474     int coded_score[6];
 475
 476     /** precomputed matrix (combine qscale and DCT renorm) */
 477     int (*q_intra_matrix)[64];
 478     int (*q_inter_matrix)[64];
 479     /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
 480     uint16_t (*q_intra_matrix16)[2][64];
 481     uint16_t (*q_inter_matrix16)[2][64];
 482     int block_last_index[12];  ///< last non zero coefficient in block
 483     /* scantables */
 484     ScanTable __align8 intra_scantable;
 485     ScanTable intra_h_scantable;
 486     ScanTable intra_v_scantable;
 487     ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
 488
 489     /* noise reduction */
 490     int (*dct_error_sum)[64];
 491     int dct_count[2];
 492     uint16_t (*dct_offset)[64];
 493
 494     void *opaque;              ///< private data for the user
 495
 496     /* bit rate control */
 497     int64_t wanted_bits;
 498     int64_t total_bits;
 499     int frame_bits;                ///< bits used for the current frame
 500     RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
 501
 502     /* statistics, used for 2-pass encoding */
 503     int mv_bits;
 504     int header_bits;
 505     int i_tex_bits;
 506     int p_tex_bits;
 507     int i_count;
 508     int f_count;
 509     int b_count;
 510     int skip_count;
 511     int misc_bits; ///< cbp, mb_type
 512     int last_bits; ///< temp var used for calculating the above vars
 513
 514     /* error concealment / resync */
 515     int error_count;
 516     uint8_t *error_status_table;       ///< table of the error status of each MB
 517 #define VP_START            1          ///< current MB is the first after a resync marker
 518 #define AC_ERROR            2
 519 #define DC_ERROR            4
 520 #define MV_ERROR            8
 521 #define AC_END              16
 522 #define DC_END              32
 523 #define MV_END              64
 524 //FIXME some prefix?
 525
 526     int resync_mb_x;                 ///< x position of last resync marker
 527     int resync_mb_y;                 ///< y position of last resync marker
 528     GetBitContext last_resync_gb;    ///< used to search for the next resync marker
 529     int mb_num_left;                 ///< number of MBs left in this video packet (for partitioned Slices only)
 530     int next_p_frame_damaged;        ///< set if the next p frame is damaged, to avoid showing trashed b frames
 531     int error_resilience;
 532
 533     ParseContext parse_context;
 534
 535     /* H.263 specific */
 536     int gob_index;
 537     int obmc;                       ///< overlapped block motion compensation
 538
 539     /* H.263+ specific */
 540     int umvplus;                    ///< == H263+ && unrestricted_mv
 541     int h263_aic;                   ///< Advanded INTRA Coding (AIC)
 542     int h263_aic_dir;               ///< AIC direction: 0 = left, 1 = top
 543     int h263_slice_structured;
 544     int alt_inter_vlc;              ///< alternative inter vlc
 545     int modified_quant;
 546     int loop_filter;
 547     int custom_pcf;
 548
 549     /* mpeg4 specific */
 550     int time_increment_resolution;
 551     int time_increment_bits;        ///< number of bits to represent the fractional part of time
 552     int last_time_base;
 553     int time_base;                  ///< time in seconds of last I,P,S Frame
 554     int64_t time;                   ///< time of current frame
 555     int64_t last_non_b_time;
 556     uint16_t pp_time;               ///< time distance between the last 2 p,s,i frames
 557     uint16_t pb_time;               ///< time distance between the last b and p,s,i frame
 558     uint16_t pp_field_time;
 559     uint16_t pb_field_time;         ///< like above, just for interlaced
 560     int shape;
 561     int vol_sprite_usage;
 562     int sprite_width;
 563     int sprite_height;
 564     int sprite_left;
 565     int sprite_top;
 566     int sprite_brightness_change;
 567     int num_sprite_warping_points;
 568     int real_sprite_warping_points;
 569     int sprite_offset[2][2];         ///< sprite offset[isChroma][isMVY]
 570     int sprite_delta[2][2];          ///< sprite_delta [isY][isMVY]
 571     int sprite_shift[2];             ///< sprite shift [isChroma]
 572     int mcsel;
 573     int quant_precision;
 574     int quarter_sample;              ///< 1->qpel, 0->half pel ME/MC
 575     int scalability;
 576     int hierachy_type;
 577     int enhancement_type;
 578     int new_pred;
 579     int reduced_res_vop;
 580     int aspect_ratio_info; //FIXME remove
 581     int sprite_warping_accuracy;
 582     int low_latency_sprite;
 583     int data_partitioning;           ///< data partitioning flag from header
 584     int partitioned_frame;           ///< is current frame partitioned
 585     int rvlc;                        ///< reversible vlc
 586     int resync_marker;               ///< could this stream contain resync markers
 587     int low_delay;                   ///< no reordering needed / has no b-frames
 588     int vo_type;
 589     int vol_control_parameters;      ///< does the stream contain the low_delay flag, used to workaround buggy encoders
 590     int intra_dc_threshold;          ///< QP above whch the ac VLC should be used for intra dc
 591     PutBitContext tex_pb;            ///< used for data partitioned VOPs
 592     PutBitContext pb2;               ///< used for data partitioned VOPs
 593     int mpeg_quant;
 594     int t_frame;                       ///< time distance of first I -> B, used for interlaced b frames
 595     int padding_bug_score;             ///< used to detect the VERY common padding bug in MPEG4
 596
 597     /* divx specific, used to workaround (many) bugs in divx5 */
 598     int divx_version;
 599     int divx_build;
 600     int divx_packed;
 601 #define BITSTREAM_BUFFER_SIZE 1024*256
 602     uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
 603     int bitstream_buffer_size;
 604
 605     int xvid_build;
 606
 607     /* lavc specific stuff, used to workaround bugs in libavcodec */
 608     int ffmpeg_version;
 609     int lavc_build;
 610
 611     /* RV10 specific */
 612     int rv10_version; ///< RV10 version: 0 or 3
 613     int rv10_first_dc_coded[3];
 614
 615     /* MJPEG specific */
 616     struct MJpegContext *mjpeg_ctx;
 617     int mjpeg_vsample[3];       ///< vertical sampling factors, default = {2, 1, 1}
 618     int mjpeg_hsample[3];       ///< horizontal sampling factors, default = {2, 1, 1}
 619     int mjpeg_write_tables;     ///< do we want to have quantisation- and huffmantables in the jpeg file ?
 620     int mjpeg_data_only_frames; ///< frames only with SOI, SOS and EOI markers
 621
 622     /* MSMPEG4 specific */
 623     int mv_table_index;
 624     int rl_table_index;
 625     int rl_chroma_table_index;
 626     int dc_table_index;
 627     int use_skip_mb_code;
 628     int slice_height;      ///< in macroblocks
 629     int first_slice_line;  ///< used in mpeg4 too to handle resync markers
 630     int flipflop_rounding;
 631     int msmpeg4_version;   ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
 632     int per_mb_rl_table;
 633     int esc3_level_length;
 634     int esc3_run_length;
 635     /** [mb_intra][isChroma][level][run][last] */
 636     int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
 637     int inter_intra_pred;
 638     int mspel;
 639
 640     /* decompression specific */
 641     GetBitContext gb;
 642
 643     /* Mpeg1 specific */
 644     int gop_picture_number;  ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
 645     int last_mv_dir;         ///< last mv_dir, used for b frame encoding
 646     int broken_link;         ///< no_output_of_prior_pics_flag
 647     uint8_t *vbv_delay_ptr;  ///< pointer to vbv_delay in the bitstream
 648
 649     /* MPEG2 specific - I wish I had not to support this mess. */
 650     int progressive_sequence;
 651     int mpeg_f_code[2][2];
 652     int picture_structure;
 653 /* picture type */
 654 #define PICT_TOP_FIELD     1
 655 #define PICT_BOTTOM_FIELD  2
 656 #define PICT_FRAME         3
 657
 658     int intra_dc_precision;
 659     int frame_pred_frame_dct;
 660     int top_field_first;
 661     int concealment_motion_vectors;
 662     int q_scale_type;
 663     int intra_vlc_format;
 664     int alternate_scan;
 665     int repeat_first_field;
 666     int chroma_420_type;
 667     int chroma_format;
 668 #define CHROMA_420 1
 669 #define CHROMA_422 2
 670 #define CHROMA_444 3
 671     int chroma_x_shift;//depend on pix_format, that depend on chroma_format
 672     int chroma_y_shift;
 673
 674     int progressive_frame;
 675     int full_pel[2];
 676     int interlaced_dct;
 677     int first_slice;
 678     int first_field;         ///< is 1 for the first field of a field picture 0 otherwise
 679
 680     /* RTP specific */
 681     int rtp_mode;
 682
 683     uint8_t *ptr_lastgob;
 684     int swap_uv;//vcr2 codec is mpeg2 varint with UV swaped
 685     short * pblocks[12];
 686
 687     DCTELEM (*block)[64]; ///< points to one of the following blocks
 688     DCTELEM (*blocks)[6][64]; // for HQ mode we need to keep the best block
 689     int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
 690 #define SLICE_OK         0
 691 #define SLICE_ERROR     -1
 692 #define SLICE_END       -2 ///<end marker found
 693 #define SLICE_NOEND     -3 ///<no end marker or error found but mb count exceeded
 694
 695     void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
 696                            DCTELEM *block/*align 16*/, int n, int qscale);
 697     void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
 698                            DCTELEM *block/*align 16*/, int n, int qscale);
 699     void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
 700                            DCTELEM *block/*align 16*/, int n, int qscale);
 701     void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
 702                            DCTELEM *block/*align 16*/, int n, int qscale);
 703     void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
 704                            DCTELEM *block/*align 16*/, int n, int qscale);
 705     void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
 706                            DCTELEM *block/*align 16*/, int n, int qscale);
 707     void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
 708                            DCTELEM *block/*align 16*/, int n, int qscale);
 709     void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
 710                            DCTELEM *block/*align 16*/, int n, int qscale);
 711     void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
 712                            DCTELEM *block/*align 16*/, int n, int qscale);
 713     void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
 714                            DCTELEM *block/*align 16*/, int n, int qscale);
 715     int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
 716     int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
 717     void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
 718 } MpegEncContext;
 719
 720
 721 int DCT_common_init(MpegEncContext *s);
 722 void MPV_decode_defaults(MpegEncContext *s);
 723 int MPV_common_init(MpegEncContext *s);
 724 void MPV_common_end(MpegEncContext *s);
 725 void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
 726 int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
 727 void MPV_frame_end(MpegEncContext *s);
 728 int MPV_encode_init(AVCodecContext *avctx);
 729 int MPV_encode_end(AVCodecContext *avctx);
 730 int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
 731 #ifdef HAVE_MMX
 732 void MPV_common_init_mmx(MpegEncContext *s);
 733 #endif
 734 #ifdef ARCH_ALPHA
 735 void MPV_common_init_axp(MpegEncContext *s);
 736 #endif
 737 #ifdef HAVE_MLIB
 738 void MPV_common_init_mlib(MpegEncContext *s);
 739 #endif
 740 #ifdef HAVE_MMI
 741 void MPV_common_init_mmi(MpegEncContext *s);
 742 #endif
 743 #ifdef ARCH_ARMV4L
 744 void MPV_common_init_armv4l(MpegEncContext *s);
 745 #endif
 746 #ifdef ARCH_POWERPC
 747 void MPV_common_init_ppc(MpegEncContext *s);
 748 #endif
 749 extern void (*draw_edges)(uint8_t *buf, int wrap, int width, int height, int w);
 750 void ff_copy_bits(PutBitContext *pb, uint8_t *src, int length);
 751 void ff_clean_intra_table_entries(MpegEncContext *s);
 752 void ff_init_scantable(uint8_t *, ScanTable *st, const uint8_t *src_scantable);
 753 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
 754 void ff_emulated_edge_mc(uint8_t *buf, uint8_t *src, int linesize, int block_w, int block_h,
 755                                     int src_x, int src_y, int w, int h);
 756 #define END_NOT_FOUND -100
 757 int ff_combine_frame(ParseContext *pc, int next, uint8_t **buf, int *buf_size);
 758 void ff_parse_close(AVCodecParserContext *s);
 759 void ff_mpeg_flush(AVCodecContext *avctx);
 760 void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
 761 void ff_write_quant_matrix(PutBitContext *pb, int16_t *matrix);
 762 int ff_find_unused_picture(MpegEncContext *s, int shared);
 763 void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
 764 void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
 765
 766 void ff_er_frame_start(MpegEncContext *s);
 767 void ff_er_frame_end(MpegEncContext *s);
 768 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
 769
 770
 771 extern enum PixelFormat ff_yuv420p_list[2];
 772
 773 void ff_init_block_index(MpegEncContext *s);
 774
 775 static inline void ff_update_block_index(MpegEncContext *s){
 776     const int block_size= 8>>s->avctx->lowres;
 777
 778     s->block_index[0]+=2;
 779     s->block_index[1]+=2;
 780     s->block_index[2]+=2;
 781     s->block_index[3]+=2;
 782     s->block_index[4]++;
 783     s->block_index[5]++;
 784     s->dest[0]+= 2*block_size;
 785     s->dest[1]+= block_size;
 786     s->dest[2]+= block_size;
 787 }
 788
 789 static inline int get_bits_diff(MpegEncContext *s){
 790     const int bits= put_bits_count(&s->pb);
 791     const int last= s->last_bits;
 792
 793     s->last_bits = bits;
 794
 795     return bits - last;
 796 }
 797
 798 /* motion_est.c */
 799 void ff_estimate_p_frame_motion(MpegEncContext * s,
 800                              int mb_x, int mb_y);
 801 void ff_estimate_b_frame_motion(MpegEncContext * s,
 802                              int mb_x, int mb_y);
 803 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
 804 void ff_fix_long_p_mvs(MpegEncContext * s);
 805 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
 806                      int16_t (*mv_table)[2], int f_code, int type, int truncate);
 807 void ff_init_me(MpegEncContext *s);
 808 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
 809 inline int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
 810                              int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
 811                              int ref_mv_scale, int size, int h);
 812 int inline ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
 813                                int ref_index, int size, int h, int add_rate);
 814
 815 /* mpeg12.c */
 816 extern const int16_t ff_mpeg1_default_intra_matrix[64];
 817 extern const int16_t ff_mpeg1_default_non_intra_matrix[64];
 818 extern uint8_t ff_mpeg1_dc_scale_table[128];
 819
 820 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
 821 void mpeg1_encode_mb(MpegEncContext *s,
 822                      DCTELEM block[6][64],
 823                      int motion_x, int motion_y);
 824 void ff_mpeg1_encode_init(MpegEncContext *s);
 825 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
 826 void ff_mpeg1_clean_buffers(MpegEncContext *s);
 827 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
 828
 829
 830 /** RLTable. */
 831 typedef struct RLTable {
 832     int n;                         ///< number of entries of table_vlc minus 1
 833     int last;                      ///< number of values for last = 0
 834     const uint16_t (*table_vlc)[2];
 835     const int8_t *table_run;
 836     const int8_t *table_level;
 837     uint8_t *index_run[2];         ///< encoding only
 838     int8_t *max_level[2];          ///< encoding & decoding
 839     int8_t *max_run[2];            ///< encoding & decoding
 840     VLC vlc;                       ///< decoding only deprected FIXME remove
 841     RL_VLC_ELEM *rl_vlc[32];       ///< decoding only
 842 } RLTable;
 843
 844 void init_rl(RLTable *rl);
 845 void init_vlc_rl(RLTable *rl);
 846
 847 static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
 848 {
 849     int index;
 850     index = rl->index_run[last][run];
 851     if (index >= rl->n)
 852         return rl->n;
 853     if (level > rl->max_level[last][run])
 854         return rl->n;
 855     return index + level - 1;
 856 }
 857
 858 extern uint8_t ff_mpeg4_y_dc_scale_table[32];
 859 extern uint8_t ff_mpeg4_c_dc_scale_table[32];
 860 extern uint8_t ff_aic_dc_scale_table[32];
 861 extern const int16_t ff_mpeg4_default_intra_matrix[64];
 862 extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
 863 extern const uint8_t ff_h263_chroma_qscale_table[32];
 864 extern const uint8_t ff_h263_loop_filter_strength[32];
 865
 866
 867 /* h263.c, h263dec.c */
 868 int ff_h263_decode_init(AVCodecContext *avctx);
 869 int ff_h263_decode_frame(AVCodecContext *avctx,
 870                              void *data, int *data_size,
 871                              uint8_t *buf, int buf_size);
 872 int ff_h263_decode_end(AVCodecContext *avctx);
 873 void h263_encode_mb(MpegEncContext *s,
 874                     DCTELEM block[6][64],
 875                     int motion_x, int motion_y);
 876 void mpeg4_encode_mb(MpegEncContext *s,
 877                     DCTELEM block[6][64],
 878                     int motion_x, int motion_y);
 879 void h263_encode_picture_header(MpegEncContext *s, int picture_number);
 880 void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number);
 881 void h263_encode_gob_header(MpegEncContext * s, int mb_line);
 882 int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir,
 883                         int *px, int *py);
 884 void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
 885                    int dir);
 886 void ff_set_mpeg4_time(MpegEncContext * s, int picture_number);
 887 void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
 888 void h263_encode_init(MpegEncContext *s);
 889 void h263_decode_init_vlc(MpegEncContext *s);
 890 int h263_decode_picture_header(MpegEncContext *s);
 891 int ff_h263_decode_gob_header(MpegEncContext *s);
 892 int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
 893 void ff_h263_update_motion_val(MpegEncContext * s);
 894 void ff_h263_loop_filter(MpegEncContext * s);
 895 void ff_set_qscale(MpegEncContext * s, int qscale);
 896 int ff_h263_decode_mba(MpegEncContext *s);
 897 void ff_h263_encode_mba(MpegEncContext *s);
 898
 899 int intel_h263_decode_picture_header(MpegEncContext *s);
 900 int flv_h263_decode_picture_header(MpegEncContext *s);
 901 int ff_h263_decode_mb(MpegEncContext *s,
 902                       DCTELEM block[6][64]);
 903 int ff_mpeg4_decode_mb(MpegEncContext *s,
 904                       DCTELEM block[6][64]);
 905 int h263_get_picture_format(int width, int height);
 906 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
 907 void ff_mpeg4_clean_buffers(MpegEncContext *s);
 908 void ff_mpeg4_stuffing(PutBitContext * pbc);
 909 void ff_mpeg4_init_partitions(MpegEncContext *s);
 910 void ff_mpeg4_merge_partitions(MpegEncContext *s);
 911 void ff_clean_mpeg4_qscales(MpegEncContext *s);
 912 void ff_clean_h263_qscales(MpegEncContext *s);
 913 int ff_mpeg4_decode_partitions(MpegEncContext *s);
 914 int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
 915 int ff_h263_resync(MpegEncContext *s);
 916 int ff_h263_get_gob_height(MpegEncContext *s);
 917 int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
 918 int ff_h263_round_chroma(int x);
 919 void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
 920 int ff_mpeg4_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
 921
 922
 923 /* rv10.c */
 924 void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
 925 int rv_decode_dc(MpegEncContext *s, int n);
 926
 927
 928 /* msmpeg4.c */
 929 void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
 930 void msmpeg4_encode_ext_header(MpegEncContext * s);
 931 void msmpeg4_encode_mb(MpegEncContext * s,
 932                        DCTELEM block[6][64],
 933                        int motion_x, int motion_y);
 934 int msmpeg4_decode_picture_header(MpegEncContext * s);
 935 int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
 936 int ff_msmpeg4_decode_init(MpegEncContext *s);
 937 void ff_msmpeg4_encode_init(MpegEncContext *s);
 938 int ff_wmv2_decode_picture_header(MpegEncContext * s);
 939 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
 940 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
 941 void ff_mspel_motion(MpegEncContext *s,
 942                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 943                                uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
 944                                int motion_x, int motion_y, int h);
 945 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
 946 void ff_wmv2_encode_mb(MpegEncContext * s,
 947                        DCTELEM block[6][64],
 948                        int motion_x, int motion_y);
 949
 950 /* mjpeg.c */
 951 int mjpeg_init(MpegEncContext *s);
 952 void mjpeg_close(MpegEncContext *s);
 953 void mjpeg_encode_mb(MpegEncContext *s,
 954                      DCTELEM block[6][64]);
 955 void mjpeg_picture_header(MpegEncContext *s);
 956 void mjpeg_picture_trailer(MpegEncContext *s);
 957 void ff_mjpeg_stuffing(PutBitContext * pbc);
 958
 959
 960 /* rate control */
 961 int ff_rate_control_init(MpegEncContext *s);
 962 float ff_rate_estimate_qscale(MpegEncContext *s);
 963 void ff_write_pass1_stats(MpegEncContext *s);
 964 void ff_rate_control_uninit(MpegEncContext *s);
 965 double ff_eval(char *s, double *const_value, const char **const_name,
 966                double (**func1)(void *, double), const char **func1_name,
 967                double (**func2)(void *, double, double), char **func2_name,
 968                void *opaque);
 969 int ff_vbv_update(MpegEncContext *s, int frame_size);
 970
 971
 972 #endif /* AVCODEC_MPEGVIDEO_H */