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
  36 #define FRAME_SKIPPED 100 ///< return value for header parsers if frame is not coded
  37
  38 enum OutputFormat {
  39     FMT_MPEG1,
  40     FMT_H261,
  41     FMT_H263,
  42     FMT_MJPEG,
  43     FMT_H264,
  44 };
  45
  46 #define EDGE_WIDTH 16
  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 /* run length table */
  65 #define MAX_RUN    64
  66 #define MAX_LEVEL  64
  67
  68 #define I_TYPE FF_I_TYPE  ///< Intra
  69 #define P_TYPE FF_P_TYPE  ///< Predicted
  70 #define B_TYPE FF_B_TYPE  ///< Bi-dir predicted
  71 #define S_TYPE FF_S_TYPE  ///< S(GMC)-VOP MPEG4
  72 #define SI_TYPE FF_SI_TYPE  ///< Switching Intra
  73 #define SP_TYPE FF_SP_TYPE  ///< Switching Predicted
  74
  75 #define MAX_MB_BYTES (30*16*16*3/8 + 120)
  76
  77 #define INPLACE_OFFSET 16
  78
  79 /* Start codes. */
  80 #define SEQ_END_CODE            0x000001b7
  81 #define SEQ_START_CODE          0x000001b3
  82 #define GOP_START_CODE          0x000001b8
  83 #define PICTURE_START_CODE      0x00000100
  84 #define SLICE_MIN_START_CODE    0x00000101
  85 #define SLICE_MAX_START_CODE    0x000001af
  86 #define EXT_START_CODE          0x000001b5
  87 #define USER_START_CODE         0x000001b2
  88
  89 /**
  90  * Scantable.
  91  */
  92 typedef struct ScanTable{
  93     const uint8_t *scantable;
  94     uint8_t permutated[64];
  95     uint8_t raster_end[64];
  96 #ifdef ARCH_POWERPC
  97                 /** Used by dct_quantize_altivec to find last-non-zero */
  98     DECLARE_ALIGNED_8(uint8_t, inverse[64]);
  99 #endif
 100 } ScanTable;
 101
 102 /**
 103  * Picture.
 104  */
 105 typedef struct Picture{
 106     FF_COMMON_FRAME
 107
 108     /**
 109      * halfpel luma planes.
 110      */
 111     uint8_t *interpolated[3];
 112     int16_t (*motion_val_base[2])[2];
 113     uint32_t *mb_type_base;
 114 #define MB_TYPE_INTRA MB_TYPE_INTRA4x4 //default mb_type if there is just one type
 115 #define IS_INTRA4x4(a)   ((a)&MB_TYPE_INTRA4x4)
 116 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
 117 #define IS_PCM(a)        ((a)&MB_TYPE_INTRA_PCM)
 118 #define IS_INTRA(a)      ((a)&7)
 119 #define IS_INTER(a)      ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
 120 #define IS_SKIP(a)       ((a)&MB_TYPE_SKIP)
 121 #define IS_INTRA_PCM(a)  ((a)&MB_TYPE_INTRA_PCM)
 122 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
 123 #define IS_DIRECT(a)     ((a)&MB_TYPE_DIRECT2)
 124 #define IS_GMC(a)        ((a)&MB_TYPE_GMC)
 125 #define IS_16X16(a)      ((a)&MB_TYPE_16x16)
 126 #define IS_16X8(a)       ((a)&MB_TYPE_16x8)
 127 #define IS_8X16(a)       ((a)&MB_TYPE_8x16)
 128 #define IS_8X8(a)        ((a)&MB_TYPE_8x8)
 129 #define IS_SUB_8X8(a)    ((a)&MB_TYPE_16x16) //note reused
 130 #define IS_SUB_8X4(a)    ((a)&MB_TYPE_16x8)  //note reused
 131 #define IS_SUB_4X8(a)    ((a)&MB_TYPE_8x16)  //note reused
 132 #define IS_SUB_4X4(a)    ((a)&MB_TYPE_8x8)   //note reused
 133 #define IS_ACPRED(a)     ((a)&MB_TYPE_ACPRED)
 134 #define IS_QUANT(a)      ((a)&MB_TYPE_QUANT)
 135 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
 136 #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
 137 #define HAS_CBP(a)        ((a)&MB_TYPE_CBP)
 138
 139     int field_poc[2];           ///< h264 top/bottom POC
 140     int poc;                    ///< h264 frame POC
 141     int frame_num;              ///< h264 frame_num (raw frame_num from slice header)
 142     int pic_id;                 /**< h264 pic_num (short -> no wrap version of pic_num,
 143                                      pic_num & max_pic_num; long -> long_pic_num) */
 144     int long_ref;               ///< 1->long term reference 0->short term reference
 145     int ref_poc[2][16];         ///< h264 POCs of the frames used as reference
 146     int ref_count[2];           ///< number of entries in ref_poc
 147
 148     int mb_var_sum;             ///< sum of MB variance for current frame
 149     int mc_mb_var_sum;          ///< motion compensated MB variance for current frame
 150     uint16_t *mb_var;           ///< Table for MB variances
 151     uint16_t *mc_mb_var;        ///< Table for motion compensated MB variances
 152     uint8_t *mb_mean;           ///< Table for MB luminance
 153     int32_t *mb_cmp_score;      ///< Table for MB cmp scores, for mb decision FIXME remove
 154     int b_frame_score;          /* */
 155 } Picture;
 156
 157 struct MpegEncContext;
 158
 159 /**
 160  * Motion estimation context.
 161  */
 162 typedef struct MotionEstContext{
 163     AVCodecContext *avctx;
 164     int skip;                          ///< set if ME is skipped for the current MB
 165     int co_located_mv[4][2];           ///< mv from last P-frame for direct mode ME
 166     int direct_basis_mv[4][2];
 167     uint8_t *scratchpad;               ///< data area for the ME algo, so that the ME does not need to malloc/free
 168     uint8_t *best_mb;
 169     uint8_t *temp_mb[2];
 170     uint8_t *temp;
 171     int best_bits;
 172     uint32_t *map;                     ///< map to avoid duplicate evaluations
 173     uint32_t *score_map;               ///< map to store the scores
 174     int map_generation;
 175     int pre_penalty_factor;
 176     int penalty_factor;                /*!< an estimate of the bits required to
 177                                         code a given mv value, e.g. (1,0) takes
 178                                         more bits than (0,0). We have to
 179                                         estimate whether any reduction in
 180                                         residual is worth the extra bits. */
 181     int sub_penalty_factor;
 182     int mb_penalty_factor;
 183     int flags;
 184     int sub_flags;
 185     int mb_flags;
 186     int pre_pass;                      ///< = 1 for the pre pass
 187     int dia_size;
 188     int xmin;
 189     int xmax;
 190     int ymin;
 191     int ymax;
 192     int pred_x;
 193     int pred_y;
 194     uint8_t *src[4][4];
 195     uint8_t *ref[4][4];
 196     int stride;
 197     int uvstride;
 198     /* temp variables for picture complexity calculation */
 199     int mc_mb_var_sum_temp;
 200     int mb_var_sum_temp;
 201     int scene_change_score;
 202 /*    cmp, chroma_cmp;*/
 203     op_pixels_func (*hpel_put)[4];
 204     op_pixels_func (*hpel_avg)[4];
 205     qpel_mc_func (*qpel_put)[16];
 206     qpel_mc_func (*qpel_avg)[16];
 207     uint8_t (*mv_penalty)[MAX_MV*2+1];  ///< amount of bits needed to encode a MV
 208     uint8_t *current_mv_penalty;
 209     int (*sub_motion_search)(struct MpegEncContext * s,
 210                                   int *mx_ptr, int *my_ptr, int dmin,
 211                                   int src_index, int ref_index,
 212                                   int size, int h);
 213 }MotionEstContext;
 214
 215 /**
 216  * MpegEncContext.
 217  */
 218 typedef struct MpegEncContext {
 219     struct AVCodecContext *avctx;
 220     /* the following parameters must be initialized before encoding */
 221     int width, height;///< picture size. must be a multiple of 16
 222     int gop_size;
 223     int intra_only;   ///< if true, only intra pictures are generated
 224     int bit_rate;     ///< wanted bit rate
 225     enum OutputFormat out_format; ///< output format
 226     int h263_pred;    ///< use mpeg4/h263 ac/dc predictions
 227
 228 /* the following codec id fields are deprecated in favor of codec_id */
 229     int h263_plus;    ///< h263 plus headers
 230     int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
 231     int h263_flv;     ///< use flv h263 header
 232
 233     enum CodecID codec_id;     /* see CODEC_ID_xxx */
 234     int fixed_qscale; ///< fixed qscale if non zero
 235     int encoding;     ///< true if we are encoding (vs decoding)
 236     int flags;        ///< AVCodecContext.flags (HQ, MV4, ...)
 237     int flags2;       ///< AVCodecContext.flags2
 238     int max_b_frames; ///< max number of b-frames for encoding
 239     int luma_elim_threshold;
 240     int chroma_elim_threshold;
 241     int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
 242     int workaround_bugs;       ///< workaround bugs in encoders which cannot be detected automatically
 243     int codec_tag;             ///< internal codec_tag upper case converted from avctx codec_tag
 244     int stream_codec_tag;      ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
 245     /* the following fields are managed internally by the encoder */
 246
 247     /** bit output */
 248     PutBitContext pb;
 249
 250     /* sequence parameters */
 251     int context_initialized;
 252     int input_picture_number;  ///< used to set pic->display_picture_number, should not be used for/by anything else
 253     int coded_picture_number;  ///< used to set pic->coded_picture_number, should not be used for/by anything else
 254     int picture_number;       //FIXME remove, unclear definition
 255     int picture_in_gop_number; ///< 0-> first pic in gop, ...
 256     int b_frames_since_non_b;  ///< used for encoding, relative to not yet reordered input
 257     int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
 258     int mb_width, mb_height;   ///< number of MBs horizontally & vertically
 259     int mb_stride;             ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
 260     int b8_stride;             ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
 261     int b4_stride;             ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
 262     int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
 263     int mb_num;                ///< number of MBs of a picture
 264     int linesize;              ///< line size, in bytes, may be different from width
 265     int uvlinesize;            ///< line size, for chroma in bytes, may be different from width
 266     Picture *picture;          ///< main picture buffer
 267     Picture **input_picture;   ///< next pictures on display order for encoding
 268     Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
 269
 270     int start_mb_y;            ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
 271     int end_mb_y;              ///< end   mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
 272     struct MpegEncContext *thread_context[MAX_THREADS];
 273
 274     /**
 275      * copy of the previous picture structure.
 276      * note, linesize & data, might not match the previous picture (for field pictures)
 277      */
 278     Picture last_picture;
 279
 280     /**
 281      * copy of the next picture structure.
 282      * note, linesize & data, might not match the next picture (for field pictures)
 283      */
 284     Picture next_picture;
 285
 286     /**
 287      * copy of the source picture structure for encoding.
 288      * note, linesize & data, might not match the source picture (for field pictures)
 289      */
 290     Picture new_picture;
 291
 292     /**
 293      * copy of the current picture structure.
 294      * note, linesize & data, might not match the current picture (for field pictures)
 295      */
 296     Picture current_picture;    ///< buffer to store the decompressed current picture
 297
 298     Picture *last_picture_ptr;     ///< pointer to the previous picture.
 299     Picture *next_picture_ptr;     ///< pointer to the next picture (for bidir pred)
 300     Picture *current_picture_ptr;  ///< pointer to the current picture
 301     uint8_t *visualization_buffer[3]; //< temporary buffer vor MV visualization
 302     int last_dc[3];                ///< last DC values for MPEG1
 303     int16_t *dc_val_base;
 304     int16_t *dc_val[3];            ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
 305     int16_t dc_cache[4*5];
 306     int y_dc_scale, c_dc_scale;
 307     const uint8_t *y_dc_scale_table;     ///< qscale -> y_dc_scale table
 308     const uint8_t *c_dc_scale_table;     ///< qscale -> c_dc_scale table
 309     const uint8_t *chroma_qscale_table;  ///< qscale -> chroma_qscale (h263)
 310     uint8_t *coded_block_base;
 311     uint8_t *coded_block;          ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
 312     int16_t (*ac_val_base)[16];
 313     int16_t (*ac_val[3])[16];      ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
 314     int ac_pred;
 315     uint8_t *prev_pict_types;     ///< previous picture types in bitstream order, used for mb skip
 316 #define PREV_PICT_TYPES_BUFFER_SIZE 256
 317     int mb_skipped;                ///< MUST BE SET only during DECODING
 318     uint8_t *mbskip_table;        /**< used to avoid copy if macroblock skipped (for black regions for example)
 319                                    and used for b-frame encoding & decoding (contains skip table of next P Frame) */
 320     uint8_t *mbintra_table;       ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
 321     uint8_t *cbp_table;           ///< used to store cbp, ac_pred for partitioned decoding
 322     uint8_t *pred_dir_table;      ///< used to store pred_dir for partitioned decoding
 323     uint8_t *allocated_edge_emu_buffer;
 324     uint8_t *edge_emu_buffer;     ///< points into the middle of allocated_edge_emu_buffer
 325     uint8_t *rd_scratchpad;       ///< scratchpad for rate distortion mb decision
 326     uint8_t *obmc_scratchpad;
 327     uint8_t *b_scratchpad;        ///< scratchpad used for writing into write only buffers
 328
 329     int qscale;                 ///< QP
 330     int chroma_qscale;          ///< chroma QP
 331     unsigned int lambda;        ///< lagrange multipler used in rate distortion
 332     unsigned int lambda2;       ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
 333     int *lambda_table;
 334     int adaptive_quant;         ///< use adaptive quantization
 335     int dquant;                 ///< qscale difference to prev qscale
 336     int pict_type;              ///< I_TYPE, P_TYPE, B_TYPE, ...
 337     int last_pict_type; //FIXME removes
 338     int last_non_b_pict_type;   ///< used for mpeg4 gmc b-frames & ratecontrol
 339     int dropable;
 340     int frame_rate_index;
 341     int last_lambda_for[5];     ///< last lambda for a specific pict type
 342     int skipdct;                ///< skip dct and code zero residual
 343
 344     /* motion compensation */
 345     int unrestricted_mv;        ///< mv can point outside of the coded picture
 346     int h263_long_vectors;      ///< use horrible h263v1 long vector mode
 347     int decode;                 ///< if 0 then decoding will be skipped (for encoding b frames for example)
 348
 349     DSPContext dsp;             ///< pointers for accelerated dsp functions
 350     int f_code;                 ///< forward MV resolution
 351     int b_code;                 ///< backward MV resolution for B Frames (mpeg4)
 352     int16_t (*p_mv_table_base)[2];
 353     int16_t (*b_forw_mv_table_base)[2];
 354     int16_t (*b_back_mv_table_base)[2];
 355     int16_t (*b_bidir_forw_mv_table_base)[2];
 356     int16_t (*b_bidir_back_mv_table_base)[2];
 357     int16_t (*b_direct_mv_table_base)[2];
 358     int16_t (*p_field_mv_table_base[2][2])[2];
 359     int16_t (*b_field_mv_table_base[2][2][2])[2];
 360     int16_t (*p_mv_table)[2];            ///< MV table (1MV per MB) p-frame encoding
 361     int16_t (*b_forw_mv_table)[2];       ///< MV table (1MV per MB) forward mode b-frame encoding
 362     int16_t (*b_back_mv_table)[2];       ///< MV table (1MV per MB) backward mode b-frame encoding
 363     int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
 364     int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
 365     int16_t (*b_direct_mv_table)[2];     ///< MV table (1MV per MB) direct mode b-frame encoding
 366     int16_t (*p_field_mv_table[2][2])[2];   ///< MV table (2MV per MB) interlaced p-frame encoding
 367     int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
 368     uint8_t (*p_field_select_table[2]);
 369     uint8_t (*b_field_select_table[2][2]);
 370     int me_method;                       ///< ME algorithm
 371     int mv_dir;
 372 #define MV_DIR_FORWARD   1
 373 #define MV_DIR_BACKWARD  2
 374 #define MV_DIRECT        4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
 375     int mv_type;
 376 #define MV_TYPE_16X16       0   ///< 1 vector for the whole mb
 377 #define MV_TYPE_8X8         1   ///< 4 vectors (h263, mpeg4 4MV)
 378 #define MV_TYPE_16X8        2   ///< 2 vectors, one per 16x8 block
 379 #define MV_TYPE_FIELD       3   ///< 2 vectors, one per field
 380 #define MV_TYPE_DMV         4   ///< 2 vectors, special mpeg2 Dual Prime Vectors
 381     /**motion vectors for a macroblock
 382        first coordinate : 0 = forward 1 = backward
 383        second "         : depend on type
 384        third  "         : 0 = x, 1 = y
 385     */
 386     int mv[2][4][2];
 387     int field_select[2][2];
 388     int last_mv[2][2][2];             ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
 389     uint8_t *fcode_tab;               ///< smallest fcode needed for each MV
 390     int16_t direct_scale_mv[2][64];   ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
 391
 392     MotionEstContext me;
 393
 394     int no_rounding;  /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
 395                         for b-frames rounding mode is always 0 */
 396
 397     int hurry_up;     /**< when set to 1 during decoding, b frames will be skipped
 398                          when set to 2 idct/dequant will be skipped too */
 399
 400     /* macroblock layer */
 401     int mb_x, mb_y;
 402     int mb_skip_run;
 403     int mb_intra;
 404     uint16_t *mb_type;           ///< Table for candidate MB types for encoding
 405 #define CANDIDATE_MB_TYPE_INTRA    0x01
 406 #define CANDIDATE_MB_TYPE_INTER    0x02
 407 #define CANDIDATE_MB_TYPE_INTER4V  0x04
 408 #define CANDIDATE_MB_TYPE_SKIPPED   0x08
 409 //#define MB_TYPE_GMC      0x10
 410
 411 #define CANDIDATE_MB_TYPE_DIRECT   0x10
 412 #define CANDIDATE_MB_TYPE_FORWARD  0x20
 413 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
 414 #define CANDIDATE_MB_TYPE_BIDIR    0x80
 415
 416 #define CANDIDATE_MB_TYPE_INTER_I    0x100
 417 #define CANDIDATE_MB_TYPE_FORWARD_I  0x200
 418 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
 419 #define CANDIDATE_MB_TYPE_BIDIR_I    0x800
 420
 421 #define CANDIDATE_MB_TYPE_DIRECT0    0x1000
 422
 423     int block_index[6]; ///< index to current MB in block based arrays with edges
 424     int block_wrap[6];
 425     uint8_t *dest[3];
 426
 427     int *mb_index2xy;        ///< mb_index -> mb_x + mb_y*mb_stride
 428
 429     /** matrix transmitted in the bitstream */
 430     uint16_t intra_matrix[64];
 431     uint16_t chroma_intra_matrix[64];
 432     uint16_t inter_matrix[64];
 433     uint16_t chroma_inter_matrix[64];
 434 #define QUANT_BIAS_SHIFT 8
 435     int intra_quant_bias;    ///< bias for the quantizer
 436     int inter_quant_bias;    ///< bias for the quantizer
 437     int min_qcoeff;          ///< minimum encodable coefficient
 438     int max_qcoeff;          ///< maximum encodable coefficient
 439     int ac_esc_length;       ///< num of bits needed to encode the longest esc
 440     uint8_t *intra_ac_vlc_length;
 441     uint8_t *intra_ac_vlc_last_length;
 442     uint8_t *inter_ac_vlc_length;
 443     uint8_t *inter_ac_vlc_last_length;
 444     uint8_t *luma_dc_vlc_length;
 445     uint8_t *chroma_dc_vlc_length;
 446 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
 447
 448     int coded_score[8];
 449
 450     /** precomputed matrix (combine qscale and DCT renorm) */
 451     int (*q_intra_matrix)[64];
 452     int (*q_inter_matrix)[64];
 453     /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
 454     uint16_t (*q_intra_matrix16)[2][64];
 455     uint16_t (*q_inter_matrix16)[2][64];
 456     int block_last_index[12];  ///< last non zero coefficient in block
 457     /* scantables */
 458     DECLARE_ALIGNED_8(ScanTable, intra_scantable);
 459     ScanTable intra_h_scantable;
 460     ScanTable intra_v_scantable;
 461     ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
 462
 463     /* noise reduction */
 464     int (*dct_error_sum)[64];
 465     int dct_count[2];
 466     uint16_t (*dct_offset)[64];
 467
 468     void *opaque;              ///< private data for the user
 469
 470     /* bit rate control */
 471     int64_t wanted_bits;
 472     int64_t total_bits;
 473     int frame_bits;                ///< bits used for the current frame
 474     int next_lambda;               ///< next lambda used for retrying to encode a frame
 475     RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
 476
 477     /* statistics, used for 2-pass encoding */
 478     int mv_bits;
 479     int header_bits;
 480     int i_tex_bits;
 481     int p_tex_bits;
 482     int i_count;
 483     int f_count;
 484     int b_count;
 485     int skip_count;
 486     int misc_bits; ///< cbp, mb_type
 487     int last_bits; ///< temp var used for calculating the above vars
 488
 489     /* error concealment / resync */
 490     int error_count;
 491     uint8_t *error_status_table;       ///< table of the error status of each MB
 492 #define VP_START            1          ///< current MB is the first after a resync marker
 493 #define AC_ERROR            2
 494 #define DC_ERROR            4
 495 #define MV_ERROR            8
 496 #define AC_END              16
 497 #define DC_END              32
 498 #define MV_END              64
 499 //FIXME some prefix?
 500
 501     int resync_mb_x;                 ///< x position of last resync marker
 502     int resync_mb_y;                 ///< y position of last resync marker
 503     GetBitContext last_resync_gb;    ///< used to search for the next resync marker
 504     int mb_num_left;                 ///< number of MBs left in this video packet (for partitioned Slices only)
 505     int next_p_frame_damaged;        ///< set if the next p frame is damaged, to avoid showing trashed b frames
 506     int error_resilience;
 507
 508     ParseContext parse_context;
 509
 510     /* H.263 specific */
 511     int gob_index;
 512     int obmc;                       ///< overlapped block motion compensation
 513
 514     /* H.263+ specific */
 515     int umvplus;                    ///< == H263+ && unrestricted_mv
 516     int h263_aic;                   ///< Advanded INTRA Coding (AIC)
 517     int h263_aic_dir;               ///< AIC direction: 0 = left, 1 = top
 518     int h263_slice_structured;
 519     int alt_inter_vlc;              ///< alternative inter vlc
 520     int modified_quant;
 521     int loop_filter;
 522     int custom_pcf;
 523
 524     /* mpeg4 specific */
 525     int time_increment_bits;        ///< number of bits to represent the fractional part of time
 526     int last_time_base;
 527     int time_base;                  ///< time in seconds of last I,P,S Frame
 528     int64_t time;                   ///< time of current frame
 529     int64_t last_non_b_time;
 530     uint16_t pp_time;               ///< time distance between the last 2 p,s,i frames
 531     uint16_t pb_time;               ///< time distance between the last b and p,s,i frame
 532     uint16_t pp_field_time;
 533     uint16_t pb_field_time;         ///< like above, just for interlaced
 534     int shape;
 535     int vol_sprite_usage;
 536     int sprite_width;
 537     int sprite_height;
 538     int sprite_left;
 539     int sprite_top;
 540     int sprite_brightness_change;
 541     int num_sprite_warping_points;
 542     int real_sprite_warping_points;
 543     int sprite_offset[2][2];         ///< sprite offset[isChroma][isMVY]
 544     int sprite_delta[2][2];          ///< sprite_delta [isY][isMVY]
 545     int sprite_shift[2];             ///< sprite shift [isChroma]
 546     int mcsel;
 547     int quant_precision;
 548     int quarter_sample;              ///< 1->qpel, 0->half pel ME/MC
 549     int scalability;
 550     int hierachy_type;
 551     int enhancement_type;
 552     int new_pred;
 553     int reduced_res_vop;
 554     int aspect_ratio_info; //FIXME remove
 555     int sprite_warping_accuracy;
 556     int low_latency_sprite;
 557     int data_partitioning;           ///< data partitioning flag from header
 558     int partitioned_frame;           ///< is current frame partitioned
 559     int rvlc;                        ///< reversible vlc
 560     int resync_marker;               ///< could this stream contain resync markers
 561     int low_delay;                   ///< no reordering needed / has no b-frames
 562     int vo_type;
 563     int vol_control_parameters;      ///< does the stream contain the low_delay flag, used to workaround buggy encoders
 564     int intra_dc_threshold;          ///< QP above whch the ac VLC should be used for intra dc
 565     int use_intra_dc_vlc;
 566     PutBitContext tex_pb;            ///< used for data partitioned VOPs
 567     PutBitContext pb2;               ///< used for data partitioned VOPs
 568     int mpeg_quant;
 569     int t_frame;                       ///< time distance of first I -> B, used for interlaced b frames
 570     int padding_bug_score;             ///< used to detect the VERY common padding bug in MPEG4
 571
 572     /* divx specific, used to workaround (many) bugs in divx5 */
 573     int divx_version;
 574     int divx_build;
 575     int divx_packed;
 576     uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
 577     int bitstream_buffer_size;
 578     unsigned int allocated_bitstream_buffer_size;
 579
 580     int xvid_build;
 581
 582     /* lavc specific stuff, used to workaround bugs in libavcodec */
 583     int lavc_build;
 584
 585     /* RV10 specific */
 586     int rv10_version; ///< RV10 version: 0 or 3
 587     int rv10_first_dc_coded[3];
 588
 589     /* MJPEG specific */
 590     struct MJpegContext *mjpeg_ctx;
 591     int mjpeg_vsample[3];       ///< vertical sampling factors, default = {2, 1, 1}
 592     int mjpeg_hsample[3];       ///< horizontal sampling factors, default = {2, 1, 1}
 593
 594     /* MSMPEG4 specific */
 595     int mv_table_index;
 596     int rl_table_index;
 597     int rl_chroma_table_index;
 598     int dc_table_index;
 599     int use_skip_mb_code;
 600     int slice_height;      ///< in macroblocks
 601     int first_slice_line;  ///< used in mpeg4 too to handle resync markers
 602     int flipflop_rounding;
 603     int msmpeg4_version;   ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
 604     int per_mb_rl_table;
 605     int esc3_level_length;
 606     int esc3_run_length;
 607     /** [mb_intra][isChroma][level][run][last] */
 608     int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
 609     int inter_intra_pred;
 610     int mspel;
 611
 612     /* decompression specific */
 613     GetBitContext gb;
 614
 615     /* Mpeg1 specific */
 616     int gop_picture_number;  ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
 617     int last_mv_dir;         ///< last mv_dir, used for b frame encoding
 618     int broken_link;         ///< no_output_of_prior_pics_flag
 619     uint8_t *vbv_delay_ptr;  ///< pointer to vbv_delay in the bitstream
 620
 621     /* MPEG2 specific - I wish I had not to support this mess. */
 622     int progressive_sequence;
 623     int mpeg_f_code[2][2];
 624     int picture_structure;
 625 /* picture type */
 626 #define PICT_TOP_FIELD     1
 627 #define PICT_BOTTOM_FIELD  2
 628 #define PICT_FRAME         3
 629
 630     int intra_dc_precision;
 631     int frame_pred_frame_dct;
 632     int top_field_first;
 633     int concealment_motion_vectors;
 634     int q_scale_type;
 635     int intra_vlc_format;
 636     int alternate_scan;
 637     int repeat_first_field;
 638     int chroma_420_type;
 639     int chroma_format;
 640 #define CHROMA_420 1
 641 #define CHROMA_422 2
 642 #define CHROMA_444 3
 643     int chroma_x_shift;//depend on pix_format, that depend on chroma_format
 644     int chroma_y_shift;
 645
 646     int progressive_frame;
 647     int full_pel[2];
 648     int interlaced_dct;
 649     int first_slice;
 650     int first_field;         ///< is 1 for the first field of a field picture 0 otherwise
 651
 652     /* RTP specific */
 653     int rtp_mode;
 654
 655     uint8_t *ptr_lastgob;
 656     int swap_uv;//vcr2 codec is mpeg2 varint with UV swaped
 657     short * pblocks[12];
 658
 659     DCTELEM (*block)[64]; ///< points to one of the following blocks
 660     DCTELEM (*blocks)[8][64]; // for HQ mode we need to keep the best block
 661     int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
 662 #define SLICE_OK         0
 663 #define SLICE_ERROR     -1
 664 #define SLICE_END       -2 ///<end marker found
 665 #define SLICE_NOEND     -3 ///<no end marker or error found but mb count exceeded
 666
 667     void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
 668                            DCTELEM *block/*align 16*/, int n, int qscale);
 669     void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
 670                            DCTELEM *block/*align 16*/, int n, int qscale);
 671     void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
 672                            DCTELEM *block/*align 16*/, int n, int qscale);
 673     void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
 674                            DCTELEM *block/*align 16*/, int n, int qscale);
 675     void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
 676                            DCTELEM *block/*align 16*/, int n, int qscale);
 677     void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
 678                            DCTELEM *block/*align 16*/, int n, int qscale);
 679     void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
 680                            DCTELEM *block/*align 16*/, int n, int qscale);
 681     void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
 682                            DCTELEM *block/*align 16*/, int n, int qscale);
 683     void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
 684                            DCTELEM *block/*align 16*/, int n, int qscale);
 685     void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
 686                            DCTELEM *block/*align 16*/, int n, int qscale);
 687     int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
 688     int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
 689     void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
 690 } MpegEncContext;
 691
 692
 693 void MPV_decode_defaults(MpegEncContext *s);
 694 int MPV_common_init(MpegEncContext *s);
 695 void MPV_common_end(MpegEncContext *s);
 696 void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
 697 int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
 698 void MPV_frame_end(MpegEncContext *s);
 699 int MPV_encode_init(AVCodecContext *avctx);
 700 int MPV_encode_end(AVCodecContext *avctx);
 701 int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
 702 void MPV_common_init_mmx(MpegEncContext *s);
 703 void MPV_common_init_axp(MpegEncContext *s);
 704 void MPV_common_init_mlib(MpegEncContext *s);
 705 void MPV_common_init_mmi(MpegEncContext *s);
 706 void MPV_common_init_armv4l(MpegEncContext *s);
 707 void MPV_common_init_altivec(MpegEncContext *s);
 708 extern void (*draw_edges)(uint8_t *buf, int wrap, int width, int height, int w);
 709 void ff_clean_intra_table_entries(MpegEncContext *s);
 710 void ff_init_scantable(uint8_t *, ScanTable *st, const uint8_t *src_scantable);
 711 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
 712 void ff_emulated_edge_mc(uint8_t *buf, uint8_t *src, int linesize, int block_w, int block_h,
 713                                     int src_x, int src_y, int w, int h);
 714 void ff_mpeg_flush(AVCodecContext *avctx);
 715 void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
 716 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
 717 int ff_find_unused_picture(MpegEncContext *s, int shared);
 718 void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
 719 void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
 720 const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
 721
 722 void ff_er_frame_start(MpegEncContext *s);
 723 void ff_er_frame_end(MpegEncContext *s);
 724 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
 725
 726 int ff_dct_common_init(MpegEncContext *s);
 727 void ff_convert_matrix(DSPContext *dsp, int (*qmat)[64], uint16_t (*qmat16)[2][64],
 728                        const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
 729
 730 extern enum PixelFormat ff_yuv420p_list[2];
 731
 732 void ff_init_block_index(MpegEncContext *s);
 733
 734 static inline void ff_update_block_index(MpegEncContext *s){
 735     const int block_size= 8>>s->avctx->lowres;
 736
 737     s->block_index[0]+=2;
 738     s->block_index[1]+=2;
 739     s->block_index[2]+=2;
 740     s->block_index[3]+=2;
 741     s->block_index[4]++;
 742     s->block_index[5]++;
 743     s->dest[0]+= 2*block_size;
 744     s->dest[1]+= block_size;
 745     s->dest[2]+= block_size;
 746 }
 747
 748 static inline int get_bits_diff(MpegEncContext *s){
 749     const int bits= put_bits_count(&s->pb);
 750     const int last= s->last_bits;
 751
 752     s->last_bits = bits;
 753
 754     return bits - last;
 755 }
 756
 757 static inline int ff_h263_round_chroma(int x){
 758     static const uint8_t h263_chroma_roundtab[16] = {
 759     //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
 760         0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
 761     };
 762     return h263_chroma_roundtab[x & 0xf] + (x >> 3);
 763 }
 764
 765 /* motion_est.c */
 766 void ff_estimate_p_frame_motion(MpegEncContext * s,
 767                              int mb_x, int mb_y);
 768 void ff_estimate_b_frame_motion(MpegEncContext * s,
 769                              int mb_x, int mb_y);
 770 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
 771 void ff_fix_long_p_mvs(MpegEncContext * s);
 772 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
 773                      int16_t (*mv_table)[2], int f_code, int type, int truncate);
 774 void ff_init_me(MpegEncContext *s);
 775 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
 776 inline int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
 777                              int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
 778                              int ref_mv_scale, int size, int h);
 779 inline int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
 780                                int ref_index, int size, int h, int add_rate);
 781
 782 /* mpeg12.c */
 783 extern const uint16_t ff_mpeg1_default_intra_matrix[64];
 784 extern const uint16_t ff_mpeg1_default_non_intra_matrix[64];
 785 extern const uint8_t ff_mpeg1_dc_scale_table[128];
 786 extern const AVRational ff_frame_rate_tab[];
 787
 788 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
 789 void mpeg1_encode_mb(MpegEncContext *s,
 790                      DCTELEM block[6][64],
 791                      int motion_x, int motion_y);
 792 void ff_mpeg1_encode_init(MpegEncContext *s);
 793 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
 794 void ff_mpeg1_clean_buffers(MpegEncContext *s);
 795 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
 796
 797 #include "rl.h"
 798
 799 extern const uint8_t ff_mpeg4_y_dc_scale_table[32];
 800 extern const uint8_t ff_mpeg4_c_dc_scale_table[32];
 801 extern const uint8_t ff_aic_dc_scale_table[32];
 802 extern const int16_t ff_mpeg4_default_intra_matrix[64];
 803 extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
 804 extern const uint8_t ff_h263_chroma_qscale_table[32];
 805 extern const uint8_t ff_h263_loop_filter_strength[32];
 806
 807 /* h261.c */
 808 void ff_h261_loop_filter(MpegEncContext *s);
 809 void ff_h261_reorder_mb_index(MpegEncContext* s);
 810 void ff_h261_encode_mb(MpegEncContext *s,
 811                     DCTELEM block[6][64],
 812                     int motion_x, int motion_y);
 813 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
 814 void ff_h261_encode_init(MpegEncContext *s);
 815 int ff_h261_get_picture_format(int width, int height);
 816
 817
 818 /* h263.c, h263dec.c */
 819 int ff_h263_decode_init(AVCodecContext *avctx);
 820 int ff_h263_decode_frame(AVCodecContext *avctx,
 821                              void *data, int *data_size,
 822                              uint8_t *buf, int buf_size);
 823 int ff_h263_decode_end(AVCodecContext *avctx);
 824 void h263_encode_mb(MpegEncContext *s,
 825                     DCTELEM block[6][64],
 826                     int motion_x, int motion_y);
 827 void mpeg4_encode_mb(MpegEncContext *s,
 828                     DCTELEM block[6][64],
 829                     int motion_x, int motion_y);
 830 void h263_encode_picture_header(MpegEncContext *s, int picture_number);
 831 void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number);
 832 void h263_encode_gob_header(MpegEncContext * s, int mb_line);
 833 int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir,
 834                         int *px, int *py);
 835 void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
 836                    int dir);
 837 void ff_set_mpeg4_time(MpegEncContext * s);
 838 void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
 839 void h263_encode_init(MpegEncContext *s);
 840 void h263_decode_init_vlc(MpegEncContext *s);
 841 int h263_decode_picture_header(MpegEncContext *s);
 842 int ff_h263_decode_gob_header(MpegEncContext *s);
 843 int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
 844 void ff_h263_update_motion_val(MpegEncContext * s);
 845 void ff_h263_loop_filter(MpegEncContext * s);
 846 void ff_set_qscale(MpegEncContext * s, int qscale);
 847 int ff_h263_decode_mba(MpegEncContext *s);
 848 void ff_h263_encode_mba(MpegEncContext *s);
 849
 850 int intel_h263_decode_picture_header(MpegEncContext *s);
 851 int flv_h263_decode_picture_header(MpegEncContext *s);
 852 int ff_h263_decode_mb(MpegEncContext *s,
 853                       DCTELEM block[6][64]);
 854 int ff_mpeg4_decode_mb(MpegEncContext *s,
 855                       DCTELEM block[6][64]);
 856 int h263_get_picture_format(int width, int height);
 857 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
 858 void ff_mpeg4_clean_buffers(MpegEncContext *s);
 859 void ff_mpeg4_stuffing(PutBitContext * pbc);
 860 void ff_mpeg4_init_partitions(MpegEncContext *s);
 861 void ff_mpeg4_merge_partitions(MpegEncContext *s);
 862 void ff_clean_mpeg4_qscales(MpegEncContext *s);
 863 void ff_clean_h263_qscales(MpegEncContext *s);
 864 int ff_mpeg4_decode_partitions(MpegEncContext *s);
 865 int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
 866 int ff_h263_resync(MpegEncContext *s);
 867 int ff_h263_get_gob_height(MpegEncContext *s);
 868 void ff_mpeg4_init_direct_mv(MpegEncContext *s);
 869 int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
 870 void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
 871
 872
 873 /* rv10.c */
 874 void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
 875 int rv_decode_dc(MpegEncContext *s, int n);
 876 void rv20_encode_picture_header(MpegEncContext *s, int picture_number);
 877
 878
 879 /* msmpeg4.c */
 880 void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
 881 void msmpeg4_encode_ext_header(MpegEncContext * s);
 882 void msmpeg4_encode_mb(MpegEncContext * s,
 883                        DCTELEM block[6][64],
 884                        int motion_x, int motion_y);
 885 int msmpeg4_decode_picture_header(MpegEncContext * s);
 886 int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
 887 int ff_msmpeg4_decode_init(MpegEncContext *s);
 888 void ff_msmpeg4_encode_init(MpegEncContext *s);
 889 int ff_wmv2_decode_picture_header(MpegEncContext * s);
 890 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
 891 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
 892 void ff_mspel_motion(MpegEncContext *s,
 893                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 894                                uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
 895                                int motion_x, int motion_y, int h);
 896 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
 897 void ff_wmv2_encode_mb(MpegEncContext * s,
 898                        DCTELEM block[6][64],
 899                        int motion_x, int motion_y);
 900
 901 #endif /* FFMPEG_MPEGVIDEO_H */
 902