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 FFmpeg.
   7  *
   8  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 mpegvideo.h
  25  * mpegvideo header.
  26  */
  27
  28 #ifndef AVCODEC_MPEGVIDEO_H
  29 #define AVCODEC_MPEGVIDEO_H
  30
  31 #include "dsputil.h"
  32 #include "bitstream.h"
  33 #include "ratecontrol.h"
  34 #include "parser.h"
  35 #include "mpeg12data.h"
  36 #include "rl.h"
  37
  38 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
  39
  40 enum OutputFormat {
  41     FMT_MPEG1,
  42     FMT_H261,
  43     FMT_H263,
  44     FMT_MJPEG,
  45     FMT_H264,
  46 };
  47
  48 #define MPEG_BUF_SIZE (16 * 1024)
  49
  50 #define QMAT_SHIFT_MMX 16
  51 #define QMAT_SHIFT 22
  52
  53 #define MAX_FCODE 7
  54 #define MAX_MV 2048
  55
  56 #define MAX_THREADS 8
  57
  58 #define MAX_PICTURE_COUNT 32
  59
  60 #define ME_MAP_SIZE 64
  61 #define ME_MAP_SHIFT 3
  62 #define ME_MAP_MV_BITS 11
  63
  64 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
  65
  66 #define INPLACE_OFFSET 16
  67
  68 /* Start codes. */
  69 #define SEQ_END_CODE            0x000001b7
  70 #define SEQ_START_CODE          0x000001b3
  71 #define GOP_START_CODE          0x000001b8
  72 #define PICTURE_START_CODE      0x00000100
  73 #define SLICE_MIN_START_CODE    0x00000101
  74 #define SLICE_MAX_START_CODE    0x000001af
  75 #define EXT_START_CODE          0x000001b5
  76 #define USER_START_CODE         0x000001b2
  77
  78 /**
  79  * Picture.
  80  */
  81 typedef struct Picture{
  82     FF_COMMON_FRAME
  83
  84     /**
  85      * halfpel luma planes.
  86      */
  87     uint8_t *interpolated[3];
  88     int16_t (*motion_val_base[2])[2];
  89     uint32_t *mb_type_base;
  90 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
  91 #define IS_INTRA4x4(a)   ((a)&MB_TYPE_INTRA4x4)
  92 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
  93 #define IS_PCM(a)        ((a)&MB_TYPE_INTRA_PCM)
  94 #define IS_INTRA(a)      ((a)&7)
  95 #define IS_INTER(a)      ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
  96 #define IS_SKIP(a)       ((a)&MB_TYPE_SKIP)
  97 #define IS_INTRA_PCM(a)  ((a)&MB_TYPE_INTRA_PCM)
  98 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
  99 #define IS_DIRECT(a)     ((a)&MB_TYPE_DIRECT2)
 100 #define IS_GMC(a)        ((a)&MB_TYPE_GMC)
 101 #define IS_16X16(a)      ((a)&MB_TYPE_16x16)
 102 #define IS_16X8(a)       ((a)&MB_TYPE_16x8)
 103 #define IS_8X16(a)       ((a)&MB_TYPE_8x16)
 104 #define IS_8X8(a)        ((a)&MB_TYPE_8x8)
 105 #define IS_SUB_8X8(a)    ((a)&MB_TYPE_16x16) //note reused
 106 #define IS_SUB_8X4(a)    ((a)&MB_TYPE_16x8)  //note reused
 107 #define IS_SUB_4X8(a)    ((a)&MB_TYPE_8x16)  //note reused
 108 #define IS_SUB_4X4(a)    ((a)&MB_TYPE_8x8)   //note reused
 109 #define IS_ACPRED(a)     ((a)&MB_TYPE_ACPRED)
 110 #define IS_QUANT(a)      ((a)&MB_TYPE_QUANT)
 111 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
 112 #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
 113 #define HAS_CBP(a)        ((a)&MB_TYPE_CBP)
 114
 115     int field_poc[2];           ///< h264 top/bottom POC
 116     int poc;                    ///< h264 frame POC
 117     int frame_num;              ///< h264 frame_num (raw frame_num from slice header)
 118     int pic_id;                 /**< h264 pic_num (short -> no wrap version of pic_num,
 119                                      pic_num & max_pic_num; long -> long_pic_num) */
 120     int long_ref;               ///< 1->long term reference 0->short term reference
 121     int ref_poc[2][2][16];      ///< h264 POCs of the frames used as reference (FIXME need per slice)
 122     int ref_count[2][2];        ///< number of entries in ref_poc              (FIXME need per slice)
 123     int mbaff;                  ///< h264 1 -> MBAFF frame 0-> not MBAFF
 124
 125     int mb_var_sum;             ///< sum of MB variance for current frame
 126     int mc_mb_var_sum;          ///< motion compensated MB variance for current frame
 127     uint16_t *mb_var;           ///< Table for MB variances
 128     uint16_t *mc_mb_var;        ///< Table for motion compensated MB variances
 129     uint8_t *mb_mean;           ///< Table for MB luminance
 130     int32_t *mb_cmp_score;      ///< Table for MB cmp scores, for mb decision FIXME remove
 131     int b_frame_score;          /* */
 132 } Picture;
 133
 134 struct MpegEncContext;
 135
 136 /**
 137  * Motion estimation context.
 138  */
 139 typedef struct MotionEstContext{
 140     AVCodecContext *avctx;
 141     int skip;                          ///< set if ME is skipped for the current MB
 142     int co_located_mv[4][2];           ///< mv from last P-frame for direct mode ME
 143     int direct_basis_mv[4][2];
 144     uint8_t *scratchpad;               ///< data area for the ME algo, so that the ME does not need to malloc/free
 145     uint8_t *best_mb;
 146     uint8_t *temp_mb[2];
 147     uint8_t *temp;
 148     int best_bits;
 149     uint32_t *map;                     ///< map to avoid duplicate evaluations
 150     uint32_t *score_map;               ///< map to store the scores
 151     int map_generation;
 152     int pre_penalty_factor;
 153     int penalty_factor;                /*!< an estimate of the bits required to
 154                                         code a given mv value, e.g. (1,0) takes
 155                                         more bits than (0,0). We have to
 156                                         estimate whether any reduction in
 157                                         residual is worth the extra bits. */
 158     int sub_penalty_factor;
 159     int mb_penalty_factor;
 160     int flags;
 161     int sub_flags;
 162     int mb_flags;
 163     int pre_pass;                      ///< = 1 for the pre pass
 164     int dia_size;
 165     int xmin;
 166     int xmax;
 167     int ymin;
 168     int ymax;
 169     int pred_x;
 170     int pred_y;
 171     uint8_t *src[4][4];
 172     uint8_t *ref[4][4];
 173     int stride;
 174     int uvstride;
 175     /* temp variables for picture complexity calculation */
 176     int mc_mb_var_sum_temp;
 177     int mb_var_sum_temp;
 178     int scene_change_score;
 179 /*    cmp, chroma_cmp;*/
 180     op_pixels_func (*hpel_put)[4];
 181     op_pixels_func (*hpel_avg)[4];
 182     qpel_mc_func (*qpel_put)[16];
 183     qpel_mc_func (*qpel_avg)[16];
 184     uint8_t (*mv_penalty)[MAX_MV*2+1];  ///< amount of bits needed to encode a MV
 185     uint8_t *current_mv_penalty;
 186     int (*sub_motion_search)(struct MpegEncContext * s,
 187                                   int *mx_ptr, int *my_ptr, int dmin,
 188                                   int src_index, int ref_index,
 189                                   int size, int h);
 190 }MotionEstContext;
 191
 192 /**
 193  * MpegEncContext.
 194  */
 195 typedef struct MpegEncContext {
 196     struct AVCodecContext *avctx;
 197     /* the following parameters must be initialized before encoding */
 198     int width, height;///< picture size. must be a multiple of 16
 199     int gop_size;
 200     int intra_only;   ///< if true, only intra pictures are generated
 201     int bit_rate;     ///< wanted bit rate
 202     enum OutputFormat out_format; ///< output format
 203     int h263_pred;    ///< use mpeg4/h263 ac/dc predictions
 204
 205 /* the following codec id fields are deprecated in favor of codec_id */
 206     int h263_plus;    ///< h263 plus headers
 207     int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
 208     int h263_flv;     ///< use flv h263 header
 209
 210     enum CodecID codec_id;     /* see CODEC_ID_xxx */
 211     int fixed_qscale; ///< fixed qscale if non zero
 212     int encoding;     ///< true if we are encoding (vs decoding)
 213     int flags;        ///< AVCodecContext.flags (HQ, MV4, ...)
 214     int flags2;       ///< AVCodecContext.flags2
 215     int max_b_frames; ///< max number of b-frames for encoding
 216     int luma_elim_threshold;
 217     int chroma_elim_threshold;
 218     int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
 219     int workaround_bugs;       ///< workaround bugs in encoders which cannot be detected automatically
 220     int codec_tag;             ///< internal codec_tag upper case converted from avctx codec_tag
 221     int stream_codec_tag;      ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
 222     /* the following fields are managed internally by the encoder */
 223
 224     /** bit output */
 225     PutBitContext pb;
 226
 227     /* sequence parameters */
 228     int context_initialized;
 229     int input_picture_number;  ///< used to set pic->display_picture_number, should not be used for/by anything else
 230     int coded_picture_number;  ///< used to set pic->coded_picture_number, should not be used for/by anything else
 231     int picture_number;       //FIXME remove, unclear definition
 232     int picture_in_gop_number; ///< 0-> first pic in gop, ...
 233     int b_frames_since_non_b;  ///< used for encoding, relative to not yet reordered input
 234     int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
 235     int mb_width, mb_height;   ///< number of MBs horizontally & vertically
 236     int mb_stride;             ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
 237     int b8_stride;             ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
 238     int b4_stride;             ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
 239     int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
 240     int mb_num;                ///< number of MBs of a picture
 241     int linesize;              ///< line size, in bytes, may be different from width
 242     int uvlinesize;            ///< line size, for chroma in bytes, may be different from width
 243     Picture *picture;          ///< main picture buffer
 244     Picture **input_picture;   ///< next pictures on display order for encoding
 245     Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
 246
 247     int start_mb_y;            ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
 248     int end_mb_y;              ///< end   mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
 249     struct MpegEncContext *thread_context[MAX_THREADS];
 250
 251     /**
 252      * copy of the previous picture structure.
 253      * note, linesize & data, might not match the previous picture (for field pictures)
 254      */
 255     Picture last_picture;
 256
 257     /**
 258      * copy of the next picture structure.
 259      * note, linesize & data, might not match the next picture (for field pictures)
 260      */
 261     Picture next_picture;
 262
 263     /**
 264      * copy of the source picture structure for encoding.
 265      * note, linesize & data, might not match the source picture (for field pictures)
 266      */
 267     Picture new_picture;
 268
 269     /**
 270      * copy of the current picture structure.
 271      * note, linesize & data, might not match the current picture (for field pictures)
 272      */
 273     Picture current_picture;    ///< buffer to store the decompressed current picture
 274
 275     Picture *last_picture_ptr;     ///< pointer to the previous picture.
 276     Picture *next_picture_ptr;     ///< pointer to the next picture (for bidir pred)
 277     Picture *current_picture_ptr;  ///< pointer to the current picture
 278     uint8_t *visualization_buffer[3]; //< temporary buffer vor MV visualization
 279     int last_dc[3];                ///< last DC values for MPEG1
 280     int16_t *dc_val_base;
 281     int16_t *dc_val[3];            ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
 282     int16_t dc_cache[4*5];
 283     int y_dc_scale, c_dc_scale;
 284     const uint8_t *y_dc_scale_table;     ///< qscale -> y_dc_scale table
 285     const uint8_t *c_dc_scale_table;     ///< qscale -> c_dc_scale table
 286     const uint8_t *chroma_qscale_table;  ///< qscale -> chroma_qscale (h263)
 287     uint8_t *coded_block_base;
 288     uint8_t *coded_block;          ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
 289     int16_t (*ac_val_base)[16];
 290     int16_t (*ac_val[3])[16];      ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
 291     int ac_pred;
 292     uint8_t *prev_pict_types;     ///< previous picture types in bitstream order, used for mb skip
 293 #define PREV_PICT_TYPES_BUFFER_SIZE 256
 294     int mb_skipped;                ///< MUST BE SET only during DECODING
 295     uint8_t *mbskip_table;        /**< used to avoid copy if macroblock skipped (for black regions for example)
 296                                    and used for b-frame encoding & decoding (contains skip table of next P Frame) */
 297     uint8_t *mbintra_table;       ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
 298     uint8_t *cbp_table;           ///< used to store cbp, ac_pred for partitioned decoding
 299     uint8_t *pred_dir_table;      ///< used to store pred_dir for partitioned decoding
 300     uint8_t *allocated_edge_emu_buffer;
 301     uint8_t *edge_emu_buffer;     ///< points into the middle of allocated_edge_emu_buffer
 302     uint8_t *rd_scratchpad;       ///< scratchpad for rate distortion mb decision
 303     uint8_t *obmc_scratchpad;
 304     uint8_t *b_scratchpad;        ///< scratchpad used for writing into write only buffers
 305
 306     int qscale;                 ///< QP
 307     int chroma_qscale;          ///< chroma QP
 308     unsigned int lambda;        ///< lagrange multipler used in rate distortion
 309     unsigned int lambda2;       ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
 310     int *lambda_table;
 311     int adaptive_quant;         ///< use adaptive quantization
 312     int dquant;                 ///< qscale difference to prev qscale
 313     int pict_type;              ///< FF_I_TYPE, FF_P_TYPE, FF_B_TYPE, ...
 314     int last_pict_type; //FIXME removes
 315     int last_non_b_pict_type;   ///< used for mpeg4 gmc b-frames & ratecontrol
 316     int dropable;
 317     int frame_rate_index;
 318     int last_lambda_for[5];     ///< last lambda for a specific pict type
 319     int skipdct;                ///< skip dct and code zero residual
 320
 321     /* motion compensation */
 322     int unrestricted_mv;        ///< mv can point outside of the coded picture
 323     int h263_long_vectors;      ///< use horrible h263v1 long vector mode
 324     int decode;                 ///< if 0 then decoding will be skipped (for encoding b frames for example)
 325
 326     DSPContext dsp;             ///< pointers for accelerated dsp functions
 327     int f_code;                 ///< forward MV resolution
 328     int b_code;                 ///< backward MV resolution for B Frames (mpeg4)
 329     int16_t (*p_mv_table_base)[2];
 330     int16_t (*b_forw_mv_table_base)[2];
 331     int16_t (*b_back_mv_table_base)[2];
 332     int16_t (*b_bidir_forw_mv_table_base)[2];
 333     int16_t (*b_bidir_back_mv_table_base)[2];
 334     int16_t (*b_direct_mv_table_base)[2];
 335     int16_t (*p_field_mv_table_base[2][2])[2];
 336     int16_t (*b_field_mv_table_base[2][2][2])[2];
 337     int16_t (*p_mv_table)[2];            ///< MV table (1MV per MB) p-frame encoding
 338     int16_t (*b_forw_mv_table)[2];       ///< MV table (1MV per MB) forward mode b-frame encoding
 339     int16_t (*b_back_mv_table)[2];       ///< MV table (1MV per MB) backward mode b-frame encoding
 340     int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
 341     int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
 342     int16_t (*b_direct_mv_table)[2];     ///< MV table (1MV per MB) direct mode b-frame encoding
 343     int16_t (*p_field_mv_table[2][2])[2];   ///< MV table (2MV per MB) interlaced p-frame encoding
 344     int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
 345     uint8_t (*p_field_select_table[2]);
 346     uint8_t (*b_field_select_table[2][2]);
 347     int me_method;                       ///< ME algorithm
 348     int mv_dir;
 349 #define MV_DIR_FORWARD   1
 350 #define MV_DIR_BACKWARD  2
 351 #define MV_DIRECT        4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
 352     int mv_type;
 353 #define MV_TYPE_16X16       0   ///< 1 vector for the whole mb
 354 #define MV_TYPE_8X8         1   ///< 4 vectors (h263, mpeg4 4MV)
 355 #define MV_TYPE_16X8        2   ///< 2 vectors, one per 16x8 block
 356 #define MV_TYPE_FIELD       3   ///< 2 vectors, one per field
 357 #define MV_TYPE_DMV         4   ///< 2 vectors, special mpeg2 Dual Prime Vectors
 358     /**motion vectors for a macroblock
 359        first coordinate : 0 = forward 1 = backward
 360        second "         : depend on type
 361        third  "         : 0 = x, 1 = y
 362     */
 363     int mv[2][4][2];
 364     int field_select[2][2];
 365     int last_mv[2][2][2];             ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
 366     uint8_t *fcode_tab;               ///< smallest fcode needed for each MV
 367     int16_t direct_scale_mv[2][64];   ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
 368
 369     MotionEstContext me;
 370
 371     int no_rounding;  /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
 372                         for b-frames rounding mode is always 0 */
 373
 374     int hurry_up;     /**< when set to 1 during decoding, b frames will be skipped
 375                          when set to 2 idct/dequant will be skipped too */
 376
 377     /* macroblock layer */
 378     int mb_x, mb_y;
 379     int mb_skip_run;
 380     int mb_intra;
 381     uint16_t *mb_type;           ///< Table for candidate MB types for encoding
 382 #define CANDIDATE_MB_TYPE_INTRA    0x01
 383 #define CANDIDATE_MB_TYPE_INTER    0x02
 384 #define CANDIDATE_MB_TYPE_INTER4V  0x04
 385 #define CANDIDATE_MB_TYPE_SKIPPED   0x08
 386 //#define MB_TYPE_GMC      0x10
 387
 388 #define CANDIDATE_MB_TYPE_DIRECT   0x10
 389 #define CANDIDATE_MB_TYPE_FORWARD  0x20
 390 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
 391 #define CANDIDATE_MB_TYPE_BIDIR    0x80
 392
 393 #define CANDIDATE_MB_TYPE_INTER_I    0x100
 394 #define CANDIDATE_MB_TYPE_FORWARD_I  0x200
 395 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
 396 #define CANDIDATE_MB_TYPE_BIDIR_I    0x800
 397
 398 #define CANDIDATE_MB_TYPE_DIRECT0    0x1000
 399
 400     int block_index[6]; ///< index to current MB in block based arrays with edges
 401     int block_wrap[6];
 402     uint8_t *dest[3];
 403
 404     int *mb_index2xy;        ///< mb_index -> mb_x + mb_y*mb_stride
 405
 406     /** matrix transmitted in the bitstream */
 407     uint16_t intra_matrix[64];
 408     uint16_t chroma_intra_matrix[64];
 409     uint16_t inter_matrix[64];
 410     uint16_t chroma_inter_matrix[64];
 411 #define QUANT_BIAS_SHIFT 8
 412     int intra_quant_bias;    ///< bias for the quantizer
 413     int inter_quant_bias;    ///< bias for the quantizer
 414     int min_qcoeff;          ///< minimum encodable coefficient
 415     int max_qcoeff;          ///< maximum encodable coefficient
 416     int ac_esc_length;       ///< num of bits needed to encode the longest esc
 417     uint8_t *intra_ac_vlc_length;
 418     uint8_t *intra_ac_vlc_last_length;
 419     uint8_t *inter_ac_vlc_length;
 420     uint8_t *inter_ac_vlc_last_length;
 421     uint8_t *luma_dc_vlc_length;
 422     uint8_t *chroma_dc_vlc_length;
 423 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
 424
 425     int coded_score[8];
 426
 427     /** precomputed matrix (combine qscale and DCT renorm) */
 428     int (*q_intra_matrix)[64];
 429     int (*q_inter_matrix)[64];
 430     /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
 431     uint16_t (*q_intra_matrix16)[2][64];
 432     uint16_t (*q_inter_matrix16)[2][64];
 433     int block_last_index[12];  ///< last non zero coefficient in block
 434     /* scantables */
 435     DECLARE_ALIGNED_8(ScanTable, intra_scantable);
 436     ScanTable intra_h_scantable;
 437     ScanTable intra_v_scantable;
 438     ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
 439
 440     /* noise reduction */
 441     int (*dct_error_sum)[64];
 442     int dct_count[2];
 443     uint16_t (*dct_offset)[64];
 444
 445     void *opaque;              ///< private data for the user
 446
 447     /* bit rate control */
 448     int64_t wanted_bits;
 449     int64_t total_bits;
 450     int frame_bits;                ///< bits used for the current frame
 451     int next_lambda;               ///< next lambda used for retrying to encode a frame
 452     RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
 453
 454     /* statistics, used for 2-pass encoding */
 455     int mv_bits;
 456     int header_bits;
 457     int i_tex_bits;
 458     int p_tex_bits;
 459     int i_count;
 460     int f_count;
 461     int b_count;
 462     int skip_count;
 463     int misc_bits; ///< cbp, mb_type
 464     int last_bits; ///< temp var used for calculating the above vars
 465
 466     /* error concealment / resync */
 467     int error_count;
 468     uint8_t *error_status_table;       ///< table of the error status of each MB
 469 #define VP_START            1          ///< current MB is the first after a resync marker
 470 #define AC_ERROR            2
 471 #define DC_ERROR            4
 472 #define MV_ERROR            8
 473 #define AC_END              16
 474 #define DC_END              32
 475 #define MV_END              64
 476 //FIXME some prefix?
 477
 478     int resync_mb_x;                 ///< x position of last resync marker
 479     int resync_mb_y;                 ///< y position of last resync marker
 480     GetBitContext last_resync_gb;    ///< used to search for the next resync marker
 481     int mb_num_left;                 ///< number of MBs left in this video packet (for partitioned Slices only)
 482     int next_p_frame_damaged;        ///< set if the next p frame is damaged, to avoid showing trashed b frames
 483     int error_recognition;
 484
 485     ParseContext parse_context;
 486
 487     /* H.263 specific */
 488     int gob_index;
 489     int obmc;                       ///< overlapped block motion compensation
 490     int showed_packed_warning;      ///< flag for having shown the warning about divxs invalid b frames
 491
 492     /* H.263+ specific */
 493     int umvplus;                    ///< == H263+ && unrestricted_mv
 494     int h263_aic;                   ///< Advanded INTRA Coding (AIC)
 495     int h263_aic_dir;               ///< AIC direction: 0 = left, 1 = top
 496     int h263_slice_structured;
 497     int alt_inter_vlc;              ///< alternative inter vlc
 498     int modified_quant;
 499     int loop_filter;
 500     int custom_pcf;
 501
 502     /* mpeg4 specific */
 503     int time_increment_bits;        ///< number of bits to represent the fractional part of time
 504     int last_time_base;
 505     int time_base;                  ///< time in seconds of last I,P,S Frame
 506     int64_t time;                   ///< time of current frame
 507     int64_t last_non_b_time;
 508     uint16_t pp_time;               ///< time distance between the last 2 p,s,i frames
 509     uint16_t pb_time;               ///< time distance between the last b and p,s,i frame
 510     uint16_t pp_field_time;
 511     uint16_t pb_field_time;         ///< like above, just for interlaced
 512     int shape;
 513     int vol_sprite_usage;
 514     int sprite_width;
 515     int sprite_height;
 516     int sprite_left;
 517     int sprite_top;
 518     int sprite_brightness_change;
 519     int num_sprite_warping_points;
 520     int real_sprite_warping_points;
 521     int sprite_offset[2][2];         ///< sprite offset[isChroma][isMVY]
 522     int sprite_delta[2][2];          ///< sprite_delta [isY][isMVY]
 523     int sprite_shift[2];             ///< sprite shift [isChroma]
 524     int mcsel;
 525     int quant_precision;
 526     int quarter_sample;              ///< 1->qpel, 0->half pel ME/MC
 527     int scalability;
 528     int hierachy_type;
 529     int enhancement_type;
 530     int new_pred;
 531     int reduced_res_vop;
 532     int aspect_ratio_info; //FIXME remove
 533     int sprite_warping_accuracy;
 534     int low_latency_sprite;
 535     int data_partitioning;           ///< data partitioning flag from header
 536     int partitioned_frame;           ///< is current frame partitioned
 537     int rvlc;                        ///< reversible vlc
 538     int resync_marker;               ///< could this stream contain resync markers
 539     int low_delay;                   ///< no reordering needed / has no b-frames
 540     int vo_type;
 541     int vol_control_parameters;      ///< does the stream contain the low_delay flag, used to workaround buggy encoders
 542     int intra_dc_threshold;          ///< QP above whch the ac VLC should be used for intra dc
 543     int use_intra_dc_vlc;
 544     PutBitContext tex_pb;            ///< used for data partitioned VOPs
 545     PutBitContext pb2;               ///< used for data partitioned VOPs
 546     int mpeg_quant;
 547     int t_frame;                       ///< time distance of first I -> B, used for interlaced b frames
 548     int padding_bug_score;             ///< used to detect the VERY common padding bug in MPEG4
 549
 550     /* divx specific, used to workaround (many) bugs in divx5 */
 551     int divx_version;
 552     int divx_build;
 553     int divx_packed;
 554     uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
 555     int bitstream_buffer_size;
 556     unsigned int allocated_bitstream_buffer_size;
 557
 558     int xvid_build;
 559
 560     /* lavc specific stuff, used to workaround bugs in libavcodec */
 561     int lavc_build;
 562
 563     /* RV10 specific */
 564     int rv10_version; ///< RV10 version: 0 or 3
 565     int rv10_first_dc_coded[3];
 566
 567     /* MJPEG specific */
 568     struct MJpegContext *mjpeg_ctx;
 569     int mjpeg_vsample[3];       ///< vertical sampling factors, default = {2, 1, 1}
 570     int mjpeg_hsample[3];       ///< horizontal sampling factors, default = {2, 1, 1}
 571
 572     /* MSMPEG4 specific */
 573     int mv_table_index;
 574     int rl_table_index;
 575     int rl_chroma_table_index;
 576     int dc_table_index;
 577     int use_skip_mb_code;
 578     int slice_height;      ///< in macroblocks
 579     int first_slice_line;  ///< used in mpeg4 too to handle resync markers
 580     int flipflop_rounding;
 581     int msmpeg4_version;   ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
 582     int per_mb_rl_table;
 583     int esc3_level_length;
 584     int esc3_run_length;
 585     /** [mb_intra][isChroma][level][run][last] */
 586     int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
 587     int inter_intra_pred;
 588     int mspel;
 589
 590     /* decompression specific */
 591     GetBitContext gb;
 592
 593     /* Mpeg1 specific */
 594     int gop_picture_number;  ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
 595     int last_mv_dir;         ///< last mv_dir, used for b frame encoding
 596     int broken_link;         ///< no_output_of_prior_pics_flag
 597     uint8_t *vbv_delay_ptr;  ///< pointer to vbv_delay in the bitstream
 598
 599     /* MPEG2 specific - I wish I had not to support this mess. */
 600     int progressive_sequence;
 601     int mpeg_f_code[2][2];
 602     int picture_structure;
 603 /* picture type */
 604 #define PICT_TOP_FIELD     1
 605 #define PICT_BOTTOM_FIELD  2
 606 #define PICT_FRAME         3
 607
 608     int intra_dc_precision;
 609     int frame_pred_frame_dct;
 610     int top_field_first;
 611     int concealment_motion_vectors;
 612     int q_scale_type;
 613     int intra_vlc_format;
 614     int alternate_scan;
 615     int repeat_first_field;
 616     int chroma_420_type;
 617     int chroma_format;
 618 #define CHROMA_420 1
 619 #define CHROMA_422 2
 620 #define CHROMA_444 3
 621     int chroma_x_shift;//depend on pix_format, that depend on chroma_format
 622     int chroma_y_shift;
 623
 624     int progressive_frame;
 625     int full_pel[2];
 626     int interlaced_dct;
 627     int first_slice;
 628     int first_field;         ///< is 1 for the first field of a field picture 0 otherwise
 629
 630     /* RTP specific */
 631     int rtp_mode;
 632
 633     uint8_t *ptr_lastgob;
 634     int swap_uv;//vcr2 codec is mpeg2 varint with UV swaped
 635     short * pblocks[12];
 636
 637     DCTELEM (*block)[64]; ///< points to one of the following blocks
 638     DCTELEM (*blocks)[8][64]; // for HQ mode we need to keep the best block
 639     int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
 640 #define SLICE_OK         0
 641 #define SLICE_ERROR     -1
 642 #define SLICE_END       -2 ///<end marker found
 643 #define SLICE_NOEND     -3 ///<no end marker or error found but mb count exceeded
 644
 645     void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
 646                            DCTELEM *block/*align 16*/, int n, int qscale);
 647     void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
 648                            DCTELEM *block/*align 16*/, int n, int qscale);
 649     void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
 650                            DCTELEM *block/*align 16*/, int n, int qscale);
 651     void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
 652                            DCTELEM *block/*align 16*/, int n, int qscale);
 653     void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
 654                            DCTELEM *block/*align 16*/, int n, int qscale);
 655     void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
 656                            DCTELEM *block/*align 16*/, int n, int qscale);
 657     void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
 658                            DCTELEM *block/*align 16*/, int n, int qscale);
 659     void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
 660                            DCTELEM *block/*align 16*/, int n, int qscale);
 661     void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
 662                            DCTELEM *block/*align 16*/, int n, int qscale);
 663     void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
 664                            DCTELEM *block/*align 16*/, int n, int qscale);
 665     int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
 666     int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
 667     void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
 668 } MpegEncContext;
 669
 670
 671 void MPV_decode_defaults(MpegEncContext *s);
 672 int MPV_common_init(MpegEncContext *s);
 673 void MPV_common_end(MpegEncContext *s);
 674 void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
 675 int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
 676 void MPV_frame_end(MpegEncContext *s);
 677 int MPV_encode_init(AVCodecContext *avctx);
 678 int MPV_encode_end(AVCodecContext *avctx);
 679 int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
 680 void MPV_common_init_mmx(MpegEncContext *s);
 681 void MPV_common_init_axp(MpegEncContext *s);
 682 void MPV_common_init_mlib(MpegEncContext *s);
 683 void MPV_common_init_mmi(MpegEncContext *s);
 684 void MPV_common_init_armv4l(MpegEncContext *s);
 685 void MPV_common_init_altivec(MpegEncContext *s);
 686 void ff_clean_intra_table_entries(MpegEncContext *s);
 687 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
 688 void ff_mpeg_flush(AVCodecContext *avctx);
 689 void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
 690 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
 691 int ff_find_unused_picture(MpegEncContext *s, int shared);
 692 void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
 693 void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
 694 const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
 695
 696 void ff_er_frame_start(MpegEncContext *s);
 697 void ff_er_frame_end(MpegEncContext *s);
 698 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
 699
 700 int ff_dct_common_init(MpegEncContext *s);
 701 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
 702                        const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
 703
 704 void ff_init_block_index(MpegEncContext *s);
 705 void ff_copy_picture(Picture *dst, Picture *src);
 706
 707 static inline void ff_update_block_index(MpegEncContext *s){
 708     const int block_size= 8>>s->avctx->lowres;
 709
 710     s->block_index[0]+=2;
 711     s->block_index[1]+=2;
 712     s->block_index[2]+=2;
 713     s->block_index[3]+=2;
 714     s->block_index[4]++;
 715     s->block_index[5]++;
 716     s->dest[0]+= 2*block_size;
 717     s->dest[1]+= block_size;
 718     s->dest[2]+= block_size;
 719 }
 720
 721 static inline int get_bits_diff(MpegEncContext *s){
 722     const int bits= put_bits_count(&s->pb);
 723     const int last= s->last_bits;
 724
 725     s->last_bits = bits;
 726
 727     return bits - last;
 728 }
 729
 730 static inline int ff_h263_round_chroma(int x){
 731     static const uint8_t h263_chroma_roundtab[16] = {
 732     //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
 733         0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
 734     };
 735     return h263_chroma_roundtab[x & 0xf] + (x >> 3);
 736 }
 737
 738 /* motion_est.c */
 739 void ff_estimate_p_frame_motion(MpegEncContext * s,
 740                              int mb_x, int mb_y);
 741 void ff_estimate_b_frame_motion(MpegEncContext * s,
 742                              int mb_x, int mb_y);
 743 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
 744 void ff_fix_long_p_mvs(MpegEncContext * s);
 745 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
 746                      int16_t (*mv_table)[2], int f_code, int type, int truncate);
 747 int ff_init_me(MpegEncContext *s);
 748 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
 749 int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
 750                              int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
 751                              int ref_mv_scale, int size, int h);
 752 int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
 753                                int ref_index, int size, int h, int add_rate);
 754
 755 /* mpeg12.c */
 756 extern const uint8_t ff_mpeg1_dc_scale_table[128];
 757
 758 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
 759 void mpeg1_encode_mb(MpegEncContext *s,
 760                      DCTELEM block[6][64],
 761                      int motion_x, int motion_y);
 762 void ff_mpeg1_encode_init(MpegEncContext *s);
 763 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
 764 void ff_mpeg1_clean_buffers(MpegEncContext *s);
 765 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
 766
 767 extern const uint8_t ff_mpeg4_y_dc_scale_table[32];
 768 extern const uint8_t ff_mpeg4_c_dc_scale_table[32];
 769 extern const uint8_t ff_aic_dc_scale_table[32];
 770 extern const int16_t ff_mpeg4_default_intra_matrix[64];
 771 extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
 772 extern const uint8_t ff_h263_chroma_qscale_table[32];
 773 extern const uint8_t ff_h263_loop_filter_strength[32];
 774
 775 /* h261.c */
 776 void ff_h261_loop_filter(MpegEncContext *s);
 777 void ff_h261_reorder_mb_index(MpegEncContext* s);
 778 void ff_h261_encode_mb(MpegEncContext *s,
 779                     DCTELEM block[6][64],
 780                     int motion_x, int motion_y);
 781 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
 782 void ff_h261_encode_init(MpegEncContext *s);
 783 int ff_h261_get_picture_format(int width, int height);
 784
 785
 786 /* h263.c, h263dec.c */
 787 int ff_h263_decode_init(AVCodecContext *avctx);
 788 int ff_h263_decode_frame(AVCodecContext *avctx,
 789                              void *data, int *data_size,
 790                              const uint8_t *buf, int buf_size);
 791 int ff_h263_decode_end(AVCodecContext *avctx);
 792 void h263_encode_mb(MpegEncContext *s,
 793                     DCTELEM block[6][64],
 794                     int motion_x, int motion_y);
 795 void mpeg4_encode_mb(MpegEncContext *s,
 796                     DCTELEM block[6][64],
 797                     int motion_x, int motion_y);
 798 void h263_encode_picture_header(MpegEncContext *s, int picture_number);
 799 void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number);
 800 void h263_encode_gob_header(MpegEncContext * s, int mb_line);
 801 int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir,
 802                         int *px, int *py);
 803 void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
 804                    int dir);
 805 void ff_set_mpeg4_time(MpegEncContext * s);
 806 void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
 807 void h263_encode_init(MpegEncContext *s);
 808 void h263_decode_init_vlc(MpegEncContext *s);
 809 int h263_decode_picture_header(MpegEncContext *s);
 810 int ff_h263_decode_gob_header(MpegEncContext *s);
 811 int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
 812 void ff_h263_update_motion_val(MpegEncContext * s);
 813 void ff_h263_loop_filter(MpegEncContext * s);
 814 void ff_set_qscale(MpegEncContext * s, int qscale);
 815 int ff_h263_decode_mba(MpegEncContext *s);
 816 void ff_h263_encode_mba(MpegEncContext *s);
 817
 818 int intel_h263_decode_picture_header(MpegEncContext *s);
 819 int flv_h263_decode_picture_header(MpegEncContext *s);
 820 int ff_h263_decode_mb(MpegEncContext *s,
 821                       DCTELEM block[6][64]);
 822 int ff_mpeg4_decode_mb(MpegEncContext *s,
 823                       DCTELEM block[6][64]);
 824 int h263_get_picture_format(int width, int height);
 825 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
 826 void ff_mpeg4_clean_buffers(MpegEncContext *s);
 827 void ff_mpeg4_stuffing(PutBitContext * pbc);
 828 void ff_mpeg4_init_partitions(MpegEncContext *s);
 829 void ff_mpeg4_merge_partitions(MpegEncContext *s);
 830 void ff_clean_mpeg4_qscales(MpegEncContext *s);
 831 void ff_clean_h263_qscales(MpegEncContext *s);
 832 int ff_mpeg4_decode_partitions(MpegEncContext *s);
 833 int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
 834 int ff_h263_resync(MpegEncContext *s);
 835 int ff_h263_get_gob_height(MpegEncContext *s);
 836 void ff_mpeg4_init_direct_mv(MpegEncContext *s);
 837 int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
 838 void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
 839
 840
 841 /* rv10.c */
 842 void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
 843 int rv_decode_dc(MpegEncContext *s, int n);
 844 void rv20_encode_picture_header(MpegEncContext *s, int picture_number);
 845
 846
 847 /* msmpeg4.c */
 848 void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
 849 void msmpeg4_encode_ext_header(MpegEncContext * s);
 850 void msmpeg4_encode_mb(MpegEncContext * s,
 851                        DCTELEM block[6][64],
 852                        int motion_x, int motion_y);
 853 int msmpeg4_decode_picture_header(MpegEncContext * s);
 854 int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
 855 int ff_msmpeg4_decode_init(MpegEncContext *s);
 856 void ff_msmpeg4_encode_init(MpegEncContext *s);
 857 int ff_wmv2_decode_picture_header(MpegEncContext * s);
 858 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
 859 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
 860 void ff_mspel_motion(MpegEncContext *s,
 861                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 862                                uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
 863                                int motion_x, int motion_y, int h);
 864 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
 865 void ff_wmv2_encode_mb(MpegEncContext * s,
 866                        DCTELEM block[6][64],
 867                        int motion_x, int motion_y);
 868
 869 #endif /* AVCODEC_MPEGVIDEO_H */
 870