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