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 file is part of Libav.
   7  *
   8  * Libav is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * Libav is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with Libav; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22
  23 /**
  24  * @file
  25  * mpegvideo header.
  26  */
  27
  28 #ifndef AVCODEC_MPEGVIDEO_H
  29 #define AVCODEC_MPEGVIDEO_H
  30
  31 #include "avcodec.h"
  32 #include "dsputil.h"
  33 #include "error_resilience.h"
  34 #include "get_bits.h"
  35 #include "put_bits.h"
  36 #include "ratecontrol.h"
  37 #include "parser.h"
  38 #include "mpeg12data.h"
  39 #include "rl.h"
  40 #include "thread.h"
  41 #include "videodsp.h"
  42
  43 #include "libavutil/opt.h"
  44
  45 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
  46
  47 enum OutputFormat {
  48     FMT_MPEG1,
  49     FMT_H261,
  50     FMT_H263,
  51     FMT_MJPEG,
  52 };
  53
  54 #define MPEG_BUF_SIZE (16 * 1024)
  55
  56 #define QMAT_SHIFT_MMX 16
  57 #define QMAT_SHIFT 22
  58
  59 #define MAX_FCODE 7
  60 #define MAX_MV 2048
  61
  62 #define MAX_THREADS 16
  63
  64 #define MAX_PICTURE_COUNT 32
  65
  66 #define ME_MAP_SIZE 64
  67 #define ME_MAP_SHIFT 3
  68 #define ME_MAP_MV_BITS 11
  69
  70 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
  71
  72 #define INPLACE_OFFSET 16
  73
  74 /* Start codes. */
  75 #define SEQ_END_CODE            0x000001b7
  76 #define SEQ_START_CODE          0x000001b3
  77 #define GOP_START_CODE          0x000001b8
  78 #define PICTURE_START_CODE      0x00000100
  79 #define SLICE_MIN_START_CODE    0x00000101
  80 #define SLICE_MAX_START_CODE    0x000001af
  81 #define EXT_START_CODE          0x000001b5
  82 #define USER_START_CODE         0x000001b2
  83
  84 /**
  85  * Value of Picture.reference when Picture is not a reference picture, but
  86  * is held for delayed output.
  87  */
  88 #define DELAYED_PIC_REF 4
  89
  90 struct MpegEncContext;
  91
  92 /**
  93  * Picture.
  94  */
  95 typedef struct Picture{
  96     struct AVFrame f;
  97     ThreadFrame tf;
  98
  99     AVBufferRef *qscale_table_buf;
 100     int8_t *qscale_table;
 101
 102     AVBufferRef *motion_val_buf[2];
 103     int16_t (*motion_val[2])[2];
 104
 105     AVBufferRef *mb_type_buf;
 106     uint32_t *mb_type;
 107
 108     AVBufferRef *mbskip_table_buf;
 109     uint8_t *mbskip_table;
 110
 111     AVBufferRef *ref_index_buf[2];
 112     int8_t *ref_index[2];
 113
 114     AVBufferRef *mb_var_buf;
 115     uint16_t *mb_var;           ///< Table for MB variances
 116
 117     AVBufferRef *mc_mb_var_buf;
 118     uint16_t *mc_mb_var;        ///< Table for motion compensated MB variances
 119
 120     AVBufferRef *mb_mean_buf;
 121     uint8_t *mb_mean;           ///< Table for MB luminance
 122
 123     AVBufferRef *hwaccel_priv_buf;
 124     /**
 125      * hardware accelerator private data
 126      */
 127     void *hwaccel_picture_private;
 128
 129 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
 130 #define IS_INTRA4x4(a)   ((a)&MB_TYPE_INTRA4x4)
 131 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
 132 #define IS_PCM(a)        ((a)&MB_TYPE_INTRA_PCM)
 133 #define IS_INTRA(a)      ((a)&7)
 134 #define IS_INTER(a)      ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
 135 #define IS_SKIP(a)       ((a)&MB_TYPE_SKIP)
 136 #define IS_INTRA_PCM(a)  ((a)&MB_TYPE_INTRA_PCM)
 137 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
 138 #define IS_DIRECT(a)     ((a)&MB_TYPE_DIRECT2)
 139 #define IS_GMC(a)        ((a)&MB_TYPE_GMC)
 140 #define IS_16X16(a)      ((a)&MB_TYPE_16x16)
 141 #define IS_16X8(a)       ((a)&MB_TYPE_16x8)
 142 #define IS_8X16(a)       ((a)&MB_TYPE_8x16)
 143 #define IS_8X8(a)        ((a)&MB_TYPE_8x8)
 144 #define IS_SUB_8X8(a)    ((a)&MB_TYPE_16x16) //note reused
 145 #define IS_SUB_8X4(a)    ((a)&MB_TYPE_16x8)  //note reused
 146 #define IS_SUB_4X8(a)    ((a)&MB_TYPE_8x16)  //note reused
 147 #define IS_SUB_4X4(a)    ((a)&MB_TYPE_8x8)   //note reused
 148 #define IS_ACPRED(a)     ((a)&MB_TYPE_ACPRED)
 149 #define IS_QUANT(a)      ((a)&MB_TYPE_QUANT)
 150 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
 151 #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
 152 #define HAS_CBP(a)        ((a)&MB_TYPE_CBP)
 153
 154     int field_poc[2];           ///< h264 top/bottom POC
 155     int poc;                    ///< h264 frame POC
 156     int frame_num;              ///< h264 frame_num (raw frame_num from slice header)
 157     int mmco_reset;             ///< h264 MMCO_RESET set this 1. Reordering code must not mix pictures before and after MMCO_RESET.
 158     int pic_id;                 /**< h264 pic_num (short -> no wrap version of pic_num,
 159                                      pic_num & max_pic_num; long -> long_pic_num) */
 160     int long_ref;               ///< 1->long term reference 0->short term reference
 161     int ref_poc[2][2][32];      ///< h264 POCs of the frames used as reference (FIXME need per slice)
 162     int ref_count[2][2];        ///< number of entries in ref_poc              (FIXME need per slice)
 163     int mbaff;                  ///< h264 1 -> MBAFF frame 0-> not MBAFF
 164     int field_picture;          ///< whether or not the picture was encoded in separate fields
 165
 166     int mb_var_sum;             ///< sum of MB variance for current frame
 167     int mc_mb_var_sum;          ///< motion compensated MB variance for current frame
 168
 169     int b_frame_score;          /* */
 170     int needs_realloc;          ///< Picture needs to be reallocated (eg due to a frame size change)
 171
 172     int reference;
 173     int shared;
 174 } Picture;
 175
 176 /**
 177  * Motion estimation context.
 178  */
 179 typedef struct MotionEstContext{
 180     AVCodecContext *avctx;
 181     int skip;                          ///< set if ME is skipped for the current MB
 182     int co_located_mv[4][2];           ///< mv from last P-frame for direct mode ME
 183     int direct_basis_mv[4][2];
 184     uint8_t *scratchpad;               ///< data area for the ME algo, so that the ME does not need to malloc/free
 185     uint8_t *best_mb;
 186     uint8_t *temp_mb[2];
 187     uint8_t *temp;
 188     int best_bits;
 189     uint32_t *map;                     ///< map to avoid duplicate evaluations
 190     uint32_t *score_map;               ///< map to store the scores
 191     unsigned map_generation;
 192     int pre_penalty_factor;
 193     int penalty_factor;                /**< an estimate of the bits required to
 194                                         code a given mv value, e.g. (1,0) takes
 195                                         more bits than (0,0). We have to
 196                                         estimate whether any reduction in
 197                                         residual is worth the extra bits. */
 198     int sub_penalty_factor;
 199     int mb_penalty_factor;
 200     int flags;
 201     int sub_flags;
 202     int mb_flags;
 203     int pre_pass;                      ///< = 1 for the pre pass
 204     int dia_size;
 205     int xmin;
 206     int xmax;
 207     int ymin;
 208     int ymax;
 209     int pred_x;
 210     int pred_y;
 211     uint8_t *src[4][4];
 212     uint8_t *ref[4][4];
 213     int stride;
 214     int uvstride;
 215     /* temp variables for picture complexity calculation */
 216     int mc_mb_var_sum_temp;
 217     int mb_var_sum_temp;
 218     int scene_change_score;
 219 /*    cmp, chroma_cmp;*/
 220     op_pixels_func (*hpel_put)[4];
 221     op_pixels_func (*hpel_avg)[4];
 222     qpel_mc_func (*qpel_put)[16];
 223     qpel_mc_func (*qpel_avg)[16];
 224     uint8_t (*mv_penalty)[MAX_MV*2+1];  ///< amount of bits needed to encode a MV
 225     uint8_t *current_mv_penalty;
 226     int (*sub_motion_search)(struct MpegEncContext * s,
 227                                   int *mx_ptr, int *my_ptr, int dmin,
 228                                   int src_index, int ref_index,
 229                                   int size, int h);
 230 }MotionEstContext;
 231
 232 /**
 233  * MpegEncContext.
 234  */
 235 typedef struct MpegEncContext {
 236     AVClass *class;
 237     struct AVCodecContext *avctx;
 238     /* the following parameters must be initialized before encoding */
 239     int width, height;///< picture size. must be a multiple of 16
 240     int gop_size;
 241     int intra_only;   ///< if true, only intra pictures are generated
 242     int bit_rate;     ///< wanted bit rate
 243     enum OutputFormat out_format; ///< output format
 244     int h263_pred;    ///< use mpeg4/h263 ac/dc predictions
 245     int pb_frame;     ///< PB frame mode (0 = none, 1 = base, 2 = improved)
 246
 247 /* the following codec id fields are deprecated in favor of codec_id */
 248     int h263_plus;    ///< h263 plus headers
 249     int h263_flv;     ///< use flv h263 header
 250
 251     enum AVCodecID codec_id;     /* see AV_CODEC_ID_xxx */
 252     int fixed_qscale; ///< fixed qscale if non zero
 253     int encoding;     ///< true if we are encoding (vs decoding)
 254     int flags;        ///< AVCodecContext.flags (HQ, MV4, ...)
 255     int flags2;       ///< AVCodecContext.flags2
 256     int max_b_frames; ///< max number of b-frames for encoding
 257     int luma_elim_threshold;
 258     int chroma_elim_threshold;
 259     int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
 260     int workaround_bugs;       ///< workaround bugs in encoders which cannot be detected automatically
 261     int codec_tag;             ///< internal codec_tag upper case converted from avctx codec_tag
 262     int stream_codec_tag;      ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
 263     /* the following fields are managed internally by the encoder */
 264
 265     /* sequence parameters */
 266     int context_initialized;
 267     int input_picture_number;  ///< used to set pic->display_picture_number, should not be used for/by anything else
 268     int coded_picture_number;  ///< used to set pic->coded_picture_number, should not be used for/by anything else
 269     int picture_number;       //FIXME remove, unclear definition
 270     int picture_in_gop_number; ///< 0-> first pic in gop, ...
 271     int mb_width, mb_height;   ///< number of MBs horizontally & vertically
 272     int mb_stride;             ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
 273     int b8_stride;             ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
 274     int b4_stride;             ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
 275     int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
 276     int mb_num;                ///< number of MBs of a picture
 277     int linesize;              ///< line size, in bytes, may be different from width
 278     int uvlinesize;            ///< line size, for chroma in bytes, may be different from width
 279     Picture *picture;          ///< main picture buffer
 280     Picture **input_picture;   ///< next pictures on display order for encoding
 281     Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
 282
 283     int y_dc_scale, c_dc_scale;
 284     int ac_pred;
 285     int block_last_index[12];  ///< last non zero coefficient in block
 286     int h263_aic;              ///< Advanded INTRA Coding (AIC)
 287
 288     /* scantables */
 289     ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
 290     ScanTable intra_scantable;
 291     ScanTable intra_h_scantable;
 292     ScanTable intra_v_scantable;
 293
 294     /* WARNING: changes above this line require updates to hardcoded
 295      *          offsets used in asm. */
 296
 297     int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
 298     /**
 299      * pts difference between the first and second input frame, used for
 300      * calculating dts of the first frame when there's a delay */
 301     int64_t dts_delta;
 302     /**
 303      * reordered pts to be used as dts for the next output frame when there's
 304      * a delay */
 305     int64_t reordered_pts;
 306
 307     /** bit output */
 308     PutBitContext pb;
 309
 310     int start_mb_y;            ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
 311     int end_mb_y;              ///< end   mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
 312     struct MpegEncContext *thread_context[MAX_THREADS];
 313     int slice_context_count;   ///< number of used thread_contexts
 314
 315     /**
 316      * copy of the previous picture structure.
 317      * note, linesize & data, might not match the previous picture (for field pictures)
 318      */
 319     Picture last_picture;
 320
 321     /**
 322      * copy of the next picture structure.
 323      * note, linesize & data, might not match the next picture (for field pictures)
 324      */
 325     Picture next_picture;
 326
 327     /**
 328      * copy of the source picture structure for encoding.
 329      * note, linesize & data, might not match the source picture (for field pictures)
 330      */
 331     Picture new_picture;
 332
 333     /**
 334      * copy of the current picture structure.
 335      * note, linesize & data, might not match the current picture (for field pictures)
 336      */
 337     Picture current_picture;    ///< buffer to store the decompressed current picture
 338
 339     Picture *last_picture_ptr;     ///< pointer to the previous picture.
 340     Picture *next_picture_ptr;     ///< pointer to the next picture (for bidir pred)
 341     Picture *current_picture_ptr;  ///< pointer to the current picture
 342     int last_dc[3];                ///< last DC values for MPEG1
 343     int16_t *dc_val_base;
 344     int16_t *dc_val[3];            ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
 345     const uint8_t *y_dc_scale_table;     ///< qscale -> y_dc_scale table
 346     const uint8_t *c_dc_scale_table;     ///< qscale -> c_dc_scale table
 347     const uint8_t *chroma_qscale_table;  ///< qscale -> chroma_qscale (h263)
 348     uint8_t *coded_block_base;
 349     uint8_t *coded_block;          ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
 350     int16_t (*ac_val_base)[16];
 351     int16_t (*ac_val[3])[16];      ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
 352     int mb_skipped;                ///< MUST BE SET only during DECODING
 353     uint8_t *mbskip_table;        /**< used to avoid copy if macroblock skipped (for black regions for example)
 354                                    and used for b-frame encoding & decoding (contains skip table of next P Frame) */
 355     uint8_t *mbintra_table;       ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
 356     uint8_t *cbp_table;           ///< used to store cbp, ac_pred for partitioned decoding
 357     uint8_t *pred_dir_table;      ///< used to store pred_dir for partitioned decoding
 358     uint8_t *edge_emu_buffer;     ///< temporary buffer for if MVs point to out-of-frame data
 359     uint8_t *rd_scratchpad;       ///< scratchpad for rate distortion mb decision
 360     uint8_t *obmc_scratchpad;
 361     uint8_t *b_scratchpad;        ///< scratchpad used for writing into write only buffers
 362
 363     int qscale;                 ///< QP
 364     int chroma_qscale;          ///< chroma QP
 365     unsigned int lambda;        ///< lagrange multipler used in rate distortion
 366     unsigned int lambda2;       ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
 367     int *lambda_table;
 368     int adaptive_quant;         ///< use adaptive quantization
 369     int dquant;                 ///< qscale difference to prev qscale
 370     int pict_type;              ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
 371     int last_pict_type; //FIXME removes
 372     int last_non_b_pict_type;   ///< used for mpeg4 gmc b-frames & ratecontrol
 373     int droppable;
 374     int frame_rate_index;
 375     int last_lambda_for[5];     ///< last lambda for a specific pict type
 376     int skipdct;                ///< skip dct and code zero residual
 377
 378     /* motion compensation */
 379     int unrestricted_mv;        ///< mv can point outside of the coded picture
 380     int h263_long_vectors;      ///< use horrible h263v1 long vector mode
 381
 382     DSPContext dsp;             ///< pointers for accelerated dsp functions
 383     VideoDSPContext vdsp;
 384     int f_code;                 ///< forward MV resolution
 385     int b_code;                 ///< backward MV resolution for B Frames (mpeg4)
 386     int16_t (*p_mv_table_base)[2];
 387     int16_t (*b_forw_mv_table_base)[2];
 388     int16_t (*b_back_mv_table_base)[2];
 389     int16_t (*b_bidir_forw_mv_table_base)[2];
 390     int16_t (*b_bidir_back_mv_table_base)[2];
 391     int16_t (*b_direct_mv_table_base)[2];
 392     int16_t (*p_field_mv_table_base[2][2])[2];
 393     int16_t (*b_field_mv_table_base[2][2][2])[2];
 394     int16_t (*p_mv_table)[2];            ///< MV table (1MV per MB) p-frame encoding
 395     int16_t (*b_forw_mv_table)[2];       ///< MV table (1MV per MB) forward mode b-frame encoding
 396     int16_t (*b_back_mv_table)[2];       ///< MV table (1MV per MB) backward mode b-frame encoding
 397     int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
 398     int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
 399     int16_t (*b_direct_mv_table)[2];     ///< MV table (1MV per MB) direct mode b-frame encoding
 400     int16_t (*p_field_mv_table[2][2])[2];   ///< MV table (2MV per MB) interlaced p-frame encoding
 401     int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
 402     uint8_t (*p_field_select_table[2]);
 403     uint8_t (*b_field_select_table[2][2]);
 404     int me_method;                       ///< ME algorithm
 405     int mv_dir;
 406 #define MV_DIR_FORWARD   1
 407 #define MV_DIR_BACKWARD  2
 408 #define MV_DIRECT        4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
 409     int mv_type;
 410 #define MV_TYPE_16X16       0   ///< 1 vector for the whole mb
 411 #define MV_TYPE_8X8         1   ///< 4 vectors (h263, mpeg4 4MV)
 412 #define MV_TYPE_16X8        2   ///< 2 vectors, one per 16x8 block
 413 #define MV_TYPE_FIELD       3   ///< 2 vectors, one per field
 414 #define MV_TYPE_DMV         4   ///< 2 vectors, special mpeg2 Dual Prime Vectors
 415     /**motion vectors for a macroblock
 416        first coordinate : 0 = forward 1 = backward
 417        second "         : depend on type
 418        third  "         : 0 = x, 1 = y
 419     */
 420     int mv[2][4][2];
 421     int field_select[2][2];
 422     int last_mv[2][2][2];             ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
 423     uint8_t *fcode_tab;               ///< smallest fcode needed for each MV
 424     int16_t direct_scale_mv[2][64];   ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
 425
 426     MotionEstContext me;
 427
 428     int no_rounding;  /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
 429                         for b-frames rounding mode is always 0 */
 430
 431     /* macroblock layer */
 432     int mb_x, mb_y;
 433     int mb_skip_run;
 434     int mb_intra;
 435     uint16_t *mb_type;           ///< Table for candidate MB types for encoding
 436 #define CANDIDATE_MB_TYPE_INTRA    0x01
 437 #define CANDIDATE_MB_TYPE_INTER    0x02
 438 #define CANDIDATE_MB_TYPE_INTER4V  0x04
 439 #define CANDIDATE_MB_TYPE_SKIPPED   0x08
 440 //#define MB_TYPE_GMC      0x10
 441
 442 #define CANDIDATE_MB_TYPE_DIRECT   0x10
 443 #define CANDIDATE_MB_TYPE_FORWARD  0x20
 444 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
 445 #define CANDIDATE_MB_TYPE_BIDIR    0x80
 446
 447 #define CANDIDATE_MB_TYPE_INTER_I    0x100
 448 #define CANDIDATE_MB_TYPE_FORWARD_I  0x200
 449 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
 450 #define CANDIDATE_MB_TYPE_BIDIR_I    0x800
 451
 452 #define CANDIDATE_MB_TYPE_DIRECT0    0x1000
 453
 454     int block_index[6]; ///< index to current MB in block based arrays with edges
 455     int block_wrap[6];
 456     uint8_t *dest[3];
 457
 458     int *mb_index2xy;        ///< mb_index -> mb_x + mb_y*mb_stride
 459
 460     /** matrix transmitted in the bitstream */
 461     uint16_t intra_matrix[64];
 462     uint16_t chroma_intra_matrix[64];
 463     uint16_t inter_matrix[64];
 464     uint16_t chroma_inter_matrix[64];
 465 #define QUANT_BIAS_SHIFT 8
 466     int intra_quant_bias;    ///< bias for the quantizer
 467     int inter_quant_bias;    ///< bias for the quantizer
 468     int min_qcoeff;          ///< minimum encodable coefficient
 469     int max_qcoeff;          ///< maximum encodable coefficient
 470     int ac_esc_length;       ///< num of bits needed to encode the longest esc
 471     uint8_t *intra_ac_vlc_length;
 472     uint8_t *intra_ac_vlc_last_length;
 473     uint8_t *inter_ac_vlc_length;
 474     uint8_t *inter_ac_vlc_last_length;
 475     uint8_t *luma_dc_vlc_length;
 476 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
 477
 478     int coded_score[8];
 479
 480     /** precomputed matrix (combine qscale and DCT renorm) */
 481     int (*q_intra_matrix)[64];
 482     int (*q_inter_matrix)[64];
 483     /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
 484     uint16_t (*q_intra_matrix16)[2][64];
 485     uint16_t (*q_inter_matrix16)[2][64];
 486
 487     /* noise reduction */
 488     int (*dct_error_sum)[64];
 489     int dct_count[2];
 490     uint16_t (*dct_offset)[64];
 491
 492     void *opaque;              ///< private data for the user
 493
 494     /* bit rate control */
 495     int64_t total_bits;
 496     int frame_bits;                ///< bits used for the current frame
 497     int next_lambda;               ///< next lambda used for retrying to encode a frame
 498     RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
 499
 500     /* statistics, used for 2-pass encoding */
 501     int mv_bits;
 502     int header_bits;
 503     int i_tex_bits;
 504     int p_tex_bits;
 505     int i_count;
 506     int f_count;
 507     int b_count;
 508     int skip_count;
 509     int misc_bits; ///< cbp, mb_type
 510     int last_bits; ///< temp var used for calculating the above vars
 511
 512     /* error concealment / resync */
 513     int resync_mb_x;                 ///< x position of last resync marker
 514     int resync_mb_y;                 ///< y position of last resync marker
 515     GetBitContext last_resync_gb;    ///< used to search for the next resync marker
 516     int mb_num_left;                 ///< number of MBs left in this video packet (for partitioned Slices only)
 517     int next_p_frame_damaged;        ///< set if the next p frame is damaged, to avoid showing trashed b frames
 518     int err_recognition;
 519
 520     ParseContext parse_context;
 521
 522     /* H.263 specific */
 523     int gob_index;
 524     int obmc;                       ///< overlapped block motion compensation
 525     int showed_packed_warning;      ///< flag for having shown the warning about divxs invalid b frames
 526     int mb_info;                    ///< interval for outputting info about mb offsets as side data
 527     int prev_mb_info, last_mb_info;
 528     uint8_t *mb_info_ptr;
 529     int mb_info_size;
 530
 531     /* H.263+ specific */
 532     int umvplus;                    ///< == H263+ && unrestricted_mv
 533     int h263_aic_dir;               ///< AIC direction: 0 = left, 1 = top
 534     int h263_slice_structured;
 535     int alt_inter_vlc;              ///< alternative inter vlc
 536     int modified_quant;
 537     int loop_filter;
 538     int custom_pcf;
 539
 540     /* mpeg4 specific */
 541     int time_increment_bits;        ///< number of bits to represent the fractional part of time
 542     int last_time_base;
 543     int time_base;                  ///< time in seconds of last I,P,S Frame
 544     int64_t time;                   ///< time of current frame
 545     int64_t last_non_b_time;
 546     uint16_t pp_time;               ///< time distance between the last 2 p,s,i frames
 547     uint16_t pb_time;               ///< time distance between the last b and p,s,i frame
 548     uint16_t pp_field_time;
 549     uint16_t pb_field_time;         ///< like above, just for interlaced
 550     int shape;
 551     int vol_sprite_usage;
 552     int sprite_width;
 553     int sprite_height;
 554     int sprite_left;
 555     int sprite_top;
 556     int sprite_brightness_change;
 557     int num_sprite_warping_points;
 558     int real_sprite_warping_points;
 559     uint16_t sprite_traj[4][2];      ///< sprite trajectory points
 560     int sprite_offset[2][2];         ///< sprite offset[isChroma][isMVY]
 561     int sprite_delta[2][2];          ///< sprite_delta [isY][isMVY]
 562     int sprite_shift[2];             ///< sprite shift [isChroma]
 563     int mcsel;
 564     int quant_precision;
 565     int quarter_sample;              ///< 1->qpel, 0->half pel ME/MC
 566     int scalability;
 567     int hierachy_type;
 568     int enhancement_type;
 569     int new_pred;
 570     int reduced_res_vop;
 571     int aspect_ratio_info; //FIXME remove
 572     int sprite_warping_accuracy;
 573     int low_latency_sprite;
 574     int data_partitioning;           ///< data partitioning flag from header
 575     int partitioned_frame;           ///< is current frame partitioned
 576     int rvlc;                        ///< reversible vlc
 577     int resync_marker;               ///< could this stream contain resync markers
 578     int low_delay;                   ///< no reordering needed / has no b-frames
 579     int vo_type;
 580     int vol_control_parameters;      ///< does the stream contain the low_delay flag, used to workaround buggy encoders
 581     int intra_dc_threshold;          ///< QP above whch the ac VLC should be used for intra dc
 582     int use_intra_dc_vlc;
 583     PutBitContext tex_pb;            ///< used for data partitioned VOPs
 584     PutBitContext pb2;               ///< used for data partitioned VOPs
 585     int mpeg_quant;
 586     int t_frame;                       ///< time distance of first I -> B, used for interlaced b frames
 587     int padding_bug_score;             ///< used to detect the VERY common padding bug in MPEG4
 588     int cplx_estimation_trash_i;
 589     int cplx_estimation_trash_p;
 590     int cplx_estimation_trash_b;
 591
 592     /* divx specific, used to workaround (many) bugs in divx5 */
 593     int divx_version;
 594     int divx_build;
 595     int divx_packed;
 596     uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
 597     int bitstream_buffer_size;
 598     unsigned int allocated_bitstream_buffer_size;
 599
 600     int xvid_build;
 601
 602     /* lavc specific stuff, used to workaround bugs in libavcodec */
 603     int lavc_build;
 604
 605     /* RV10 specific */
 606     int rv10_version; ///< RV10 version: 0 or 3
 607     int rv10_first_dc_coded[3];
 608     int orig_width, orig_height;
 609
 610     /* MJPEG specific */
 611     struct MJpegContext *mjpeg_ctx;
 612     int mjpeg_vsample[3];       ///< vertical sampling factors, default = {2, 1, 1}
 613     int mjpeg_hsample[3];       ///< horizontal sampling factors, default = {2, 1, 1}
 614
 615     /* MSMPEG4 specific */
 616     int mv_table_index;
 617     int rl_table_index;
 618     int rl_chroma_table_index;
 619     int dc_table_index;
 620     int use_skip_mb_code;
 621     int slice_height;      ///< in macroblocks
 622     int first_slice_line;  ///< used in mpeg4 too to handle resync markers
 623     int flipflop_rounding;
 624     int msmpeg4_version;   ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
 625     int per_mb_rl_table;
 626     int esc3_level_length;
 627     int esc3_run_length;
 628     /** [mb_intra][isChroma][level][run][last] */
 629     int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
 630     int inter_intra_pred;
 631     int mspel;
 632
 633     /* decompression specific */
 634     GetBitContext gb;
 635
 636     /* Mpeg1 specific */
 637     int gop_picture_number;  ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
 638     int last_mv_dir;         ///< last mv_dir, used for b frame encoding
 639     int broken_link;         ///< no_output_of_prior_pics_flag
 640     uint8_t *vbv_delay_ptr;  ///< pointer to vbv_delay in the bitstream
 641
 642     /* MPEG-2-specific - I wished not to have to support this mess. */
 643     int progressive_sequence;
 644     int mpeg_f_code[2][2];
 645     int picture_structure;
 646 /* picture type */
 647 #define PICT_TOP_FIELD     1
 648 #define PICT_BOTTOM_FIELD  2
 649 #define PICT_FRAME         3
 650
 651     int intra_dc_precision;
 652     int frame_pred_frame_dct;
 653     int top_field_first;
 654     int concealment_motion_vectors;
 655     int q_scale_type;
 656     int intra_vlc_format;
 657     int alternate_scan;
 658     int repeat_first_field;
 659     int chroma_420_type;
 660     int chroma_format;
 661 #define CHROMA_420 1
 662 #define CHROMA_422 2
 663 #define CHROMA_444 3
 664     int chroma_x_shift;//depend on pix_format, that depend on chroma_format
 665     int chroma_y_shift;
 666
 667     int progressive_frame;
 668     int full_pel[2];
 669     int interlaced_dct;
 670     int first_slice;
 671     int first_field;         ///< is 1 for the first field of a field picture 0 otherwise
 672     int drop_frame_timecode; ///< timecode is in drop frame format.
 673     int scan_offset;         ///< reserve space for SVCD scan offset user data.
 674
 675     /* RTP specific */
 676     int rtp_mode;
 677
 678     uint8_t *ptr_lastgob;
 679     int swap_uv;             //vcr2 codec is an MPEG-2 variant with U and V swapped
 680     int16_t (*pblocks[12])[64];
 681
 682     int16_t (*block)[64]; ///< points to one of the following blocks
 683     int16_t (*blocks)[8][64]; // for HQ mode we need to keep the best block
 684     int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()
 685 #define SLICE_OK         0
 686 #define SLICE_ERROR     -1
 687 #define SLICE_END       -2 ///<end marker found
 688 #define SLICE_NOEND     -3 ///<no end marker or error found but mb count exceeded
 689
 690     void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
 691                            int16_t *block/*align 16*/, int n, int qscale);
 692     void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
 693                            int16_t *block/*align 16*/, int n, int qscale);
 694     void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
 695                            int16_t *block/*align 16*/, int n, int qscale);
 696     void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
 697                            int16_t *block/*align 16*/, int n, int qscale);
 698     void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
 699                            int16_t *block/*align 16*/, int n, int qscale);
 700     void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
 701                            int16_t *block/*align 16*/, int n, int qscale);
 702     void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
 703                            int16_t *block/*align 16*/, int n, int qscale);
 704     void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
 705                            int16_t *block/*align 16*/, int n, int qscale);
 706     void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
 707                            int16_t *block/*align 16*/, int n, int qscale);
 708     void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
 709                            int16_t *block/*align 16*/, int n, int qscale);
 710     int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
 711     int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
 712     void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
 713
 714     int mpv_flags;      ///< flags set by private options
 715     int quantizer_noise_shaping;
 716
 717     /* temp buffers for rate control */
 718     float *cplx_tab, *bits_tab;
 719
 720     /* flag to indicate a reinitialization is required, e.g. after
 721      * a frame size change */
 722     int context_reinit;
 723
 724     ERContext er;
 725 } MpegEncContext;
 726
 727 #define REBASE_PICTURE(pic, new_ctx, old_ctx)             \
 728     ((pic && pic >= old_ctx->picture &&                   \
 729       pic < old_ctx->picture + MAX_PICTURE_COUNT) ?  \
 730         &new_ctx->picture[pic - old_ctx->picture] : NULL)
 731
 732 /* mpegvideo_enc common options */
 733 #define FF_MPV_FLAG_SKIP_RD      0x0001
 734 #define FF_MPV_FLAG_STRICT_GOP   0x0002
 735 #define FF_MPV_FLAG_QP_RD        0x0004
 736 #define FF_MPV_FLAG_CBP_RD       0x0008
 737
 738 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
 739 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
 740 #define FF_MPV_COMMON_OPTS \
 741 { "mpv_flags",      "Flags common for all mpegvideo-based encoders.", FF_MPV_OFFSET(mpv_flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "mpv_flags" },\
 742 { "skip_rd",        "RD optimal MB level residual skipping", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_SKIP_RD },    0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
 743 { "strict_gop",     "Strictly enforce gop size",             0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_STRICT_GOP }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
 744 { "qp_rd",          "Use rate distortion optimization for qp selection", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_QP_RD },  0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
 745 { "cbp_rd",         "use rate distortion optimization for CBP",          0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_CBP_RD }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
 746 { "luma_elim_threshold",   "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
 747                                                                       FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
 748 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
 749                                                                       FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
 750 { "quantizer_noise_shaping", NULL,                                  FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 },       0, INT_MAX, FF_MPV_OPT_FLAGS },
 751
 752 extern const AVOption ff_mpv_generic_options[];
 753
 754 #define FF_MPV_GENERIC_CLASS(name) \
 755 static const AVClass name ## _class = {\
 756     .class_name = #name " encoder",\
 757     .item_name  = av_default_item_name,\
 758     .option     = ff_mpv_generic_options,\
 759     .version    = LIBAVUTIL_VERSION_INT,\
 760 };
 761
 762 /**
 763  * Set the given MpegEncContext to common defaults (same for encoding
 764  * and decoding).  The changed fields will not depend upon the prior
 765  * state of the MpegEncContext.
 766  */
 767 void ff_MPV_common_defaults(MpegEncContext *s);
 768
 769 void ff_MPV_decode_defaults(MpegEncContext *s);
 770 int ff_MPV_common_init(MpegEncContext *s);
 771 int ff_mpv_frame_size_alloc(MpegEncContext *s, int linesize);
 772 int ff_MPV_common_frame_size_change(MpegEncContext *s);
 773 void ff_MPV_common_end(MpegEncContext *s);
 774 void ff_MPV_decode_mb(MpegEncContext *s, int16_t block[12][64]);
 775 int ff_MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
 776 void ff_MPV_frame_end(MpegEncContext *s);
 777 int ff_MPV_encode_init(AVCodecContext *avctx);
 778 int ff_MPV_encode_end(AVCodecContext *avctx);
 779 int ff_MPV_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
 780                           const AVFrame *frame, int *got_packet);
 781 void ff_MPV_encode_init_x86(MpegEncContext *s);
 782 void ff_MPV_common_init_x86(MpegEncContext *s);
 783 void ff_MPV_common_init_axp(MpegEncContext *s);
 784 void ff_MPV_common_init_arm(MpegEncContext *s);
 785 void ff_MPV_common_init_altivec(MpegEncContext *s);
 786 void ff_MPV_common_init_bfin(MpegEncContext *s);
 787 void ff_clean_intra_table_entries(MpegEncContext *s);
 788 void ff_draw_horiz_band(AVCodecContext *avctx, DSPContext *dsp, Picture *cur,
 789                         Picture *last, int y, int h, int picture_structure,
 790                         int first_field, int draw_edges, int low_delay,
 791                         int v_edge_pos, int h_edge_pos);
 792 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
 793 void ff_mpeg_flush(AVCodecContext *avctx);
 794 void ff_print_debug_info(MpegEncContext *s, Picture *p);
 795 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
 796 void ff_release_unused_pictures(MpegEncContext *s, int remove_current);
 797 int ff_find_unused_picture(MpegEncContext *s, int shared);
 798 void ff_denoise_dct(MpegEncContext *s, int16_t *block);
 799 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
 800 int ff_MPV_lowest_referenced_row(MpegEncContext *s, int dir);
 801 void ff_MPV_report_decode_progress(MpegEncContext *s);
 802 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
 803 const uint8_t *avpriv_mpv_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
 804 void ff_set_qscale(MpegEncContext * s, int qscale);
 805
 806 void ff_mpeg_er_frame_start(MpegEncContext *s);
 807
 808 int ff_dct_common_init(MpegEncContext *s);
 809 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
 810                        const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
 811 int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
 812
 813 void ff_init_block_index(MpegEncContext *s);
 814
 815 void ff_MPV_motion(MpegEncContext *s,
 816                    uint8_t *dest_y, uint8_t *dest_cb,
 817                    uint8_t *dest_cr, int dir,
 818                    uint8_t **ref_picture,
 819                    op_pixels_func (*pix_op)[4],
 820                    qpel_mc_func (*qpix_op)[16]);
 821
 822 /**
 823  * Allocate a Picture.
 824  * The pixels are allocated/set by calling get_buffer() if shared = 0.
 825  */
 826 int ff_alloc_picture(MpegEncContext *s, Picture *pic, int shared);
 827
 828 extern const enum AVPixelFormat ff_pixfmt_list_420[];
 829
 830 /**
 831  * permute block according to permuatation.
 832  * @param last last non zero element in scantable order
 833  */
 834 void ff_block_permute(int16_t *block, uint8_t *permutation, const uint8_t *scantable, int last);
 835
 836 static inline void ff_update_block_index(MpegEncContext *s){
 837     const int block_size = 8;
 838
 839     s->block_index[0]+=2;
 840     s->block_index[1]+=2;
 841     s->block_index[2]+=2;
 842     s->block_index[3]+=2;
 843     s->block_index[4]++;
 844     s->block_index[5]++;
 845     s->dest[0]+= 2*block_size;
 846     s->dest[1]+= block_size;
 847     s->dest[2]+= block_size;
 848 }
 849
 850 static inline int get_bits_diff(MpegEncContext *s){
 851     const int bits= put_bits_count(&s->pb);
 852     const int last= s->last_bits;
 853
 854     s->last_bits = bits;
 855
 856     return bits - last;
 857 }
 858
 859 static inline int ff_h263_round_chroma(int x){
 860     static const uint8_t h263_chroma_roundtab[16] = {
 861     //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
 862         0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
 863     };
 864     return h263_chroma_roundtab[x & 0xf] + (x >> 3);
 865 }
 866
 867 /* motion_est.c */
 868 void ff_estimate_p_frame_motion(MpegEncContext * s,
 869                              int mb_x, int mb_y);
 870 void ff_estimate_b_frame_motion(MpegEncContext * s,
 871                              int mb_x, int mb_y);
 872 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
 873 void ff_fix_long_p_mvs(MpegEncContext * s);
 874 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
 875                      int16_t (*mv_table)[2], int f_code, int type, int truncate);
 876 int ff_init_me(MpegEncContext *s);
 877 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
 878 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
 879                              int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
 880                              int ref_mv_scale, int size, int h);
 881 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
 882                                int ref_index, int size, int h, int add_rate);
 883
 884 /* mpeg12.c */
 885 extern const uint8_t ff_mpeg1_dc_scale_table[128];
 886 extern const uint8_t * const ff_mpeg2_dc_scale_table[4];
 887
 888 void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
 889 void ff_mpeg1_encode_mb(MpegEncContext *s,
 890                         int16_t block[6][64],
 891                         int motion_x, int motion_y);
 892 void ff_mpeg1_encode_init(MpegEncContext *s);
 893 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
 894 void ff_mpeg1_clean_buffers(MpegEncContext *s);
 895 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s);
 896
 897 extern const uint8_t ff_aic_dc_scale_table[32];
 898 extern const uint8_t ff_h263_chroma_qscale_table[32];
 899 extern const uint8_t ff_h263_loop_filter_strength[32];
 900
 901 /* h261.c */
 902 void ff_h261_loop_filter(MpegEncContext *s);
 903 void ff_h261_reorder_mb_index(MpegEncContext* s);
 904 void ff_h261_encode_mb(MpegEncContext *s,
 905                     int16_t block[6][64],
 906                     int motion_x, int motion_y);
 907 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
 908 void ff_h261_encode_init(MpegEncContext *s);
 909 int ff_h261_get_picture_format(int width, int height);
 910
 911
 912 /* rv10.c */
 913 void ff_rv10_encode_picture_header(MpegEncContext *s, int picture_number);
 914 int ff_rv_decode_dc(MpegEncContext *s, int n);
 915 void ff_rv20_encode_picture_header(MpegEncContext *s, int picture_number);
 916
 917
 918 /* msmpeg4.c */
 919 void ff_msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
 920 void ff_msmpeg4_encode_ext_header(MpegEncContext * s);
 921 void ff_msmpeg4_encode_mb(MpegEncContext * s,
 922                           int16_t block[6][64],
 923                           int motion_x, int motion_y);
 924 int ff_msmpeg4_decode_picture_header(MpegEncContext * s);
 925 int ff_msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
 926 int ff_msmpeg4_decode_init(AVCodecContext *avctx);
 927 void ff_msmpeg4_encode_init(MpegEncContext *s);
 928 int ff_wmv2_decode_picture_header(MpegEncContext * s);
 929 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
 930 void ff_wmv2_add_mb(MpegEncContext *s, int16_t block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
 931 void ff_mspel_motion(MpegEncContext *s,
 932                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 933                                uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
 934                                int motion_x, int motion_y, int h);
 935 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
 936 void ff_wmv2_encode_mb(MpegEncContext * s,
 937                        int16_t block[6][64],
 938                        int motion_x, int motion_y);
 939
 940 int ff_mpeg_ref_picture(MpegEncContext *s, Picture *dst, Picture *src);
 941 void ff_mpeg_unref_picture(MpegEncContext *s, Picture *picture);
 942
 943 #endif /* AVCODEC_MPEGVIDEO_H */