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
  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_quantise_alitvec 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 theres 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
 142     int pic_id;                 ///< h264 pic_num or long_term_pic_idx
 143     int long_ref;               ///< 1->long term reference 0->short term reference
 144     int ref_poc[2][16];         ///< h264 POCs of the frames used as reference
 145     int ref_count[2];           ///< number of entries in ref_poc
 146
 147     int mb_var_sum;             ///< sum of MB variance for current frame
 148     int mc_mb_var_sum;          ///< motion compensated MB variance for current frame
 149     uint16_t *mb_var;           ///< Table for MB variances
 150     uint16_t *mc_mb_var;        ///< Table for motion compensated MB variances
 151     uint8_t *mb_mean;           ///< Table for MB luminance
 152     int32_t *mb_cmp_score;      ///< Table for MB cmp scores, for mb decision FIXME remove
 153     int b_frame_score;          /* */
 154 } Picture;
 155
 156 struct MpegEncContext;
 157
 158 /**
 159  * Motion estimation context.
 160  */
 161 typedef struct MotionEstContext{
 162     AVCodecContext *avctx;
 163     int skip;                          ///< set if ME is skipped for the current MB
 164     int co_located_mv[4][2];           ///< mv from last P-frame for direct mode ME
 165     int direct_basis_mv[4][2];
 166     uint8_t *scratchpad;               ///< data area for the ME algo, so that the ME does not need to malloc/free
 167     uint8_t *best_mb;
 168     uint8_t *temp_mb[2];
 169     uint8_t *temp;
 170     int best_bits;
 171     uint32_t *map;                     ///< map to avoid duplicate evaluations
 172     uint32_t *score_map;               ///< map to store the scores
 173     int map_generation;
 174     int pre_penalty_factor;
 175     int penalty_factor;                /*!< an estimate of the bits required to
 176                                         code a given mv value, e.g. (1,0) takes
 177                                         more bits than (0,0). We have to
 178                                         estimate whether any reduction in
 179                                         residual is worth the extra bits. */
 180     int sub_penalty_factor;
 181     int mb_penalty_factor;
 182     int flags;
 183     int sub_flags;
 184     int mb_flags;
 185     int pre_pass;                      ///< = 1 for the pre pass
 186     int dia_size;
 187     int xmin;
 188     int xmax;
 189     int ymin;
 190     int ymax;
 191     int pred_x;
 192     int pred_y;
 193     uint8_t *src[4][4];
 194     uint8_t *ref[4][4];
 195     int stride;
 196     int uvstride;
 197     /* temp variables for picture complexity calculation */
 198     int mc_mb_var_sum_temp;
 199     int mb_var_sum_temp;
 200     int scene_change_score;
 201 /*    cmp, chroma_cmp;*/
 202     op_pixels_func (*hpel_put)[4];
 203     op_pixels_func (*hpel_avg)[4];
 204     qpel_mc_func (*qpel_put)[16];
 205     qpel_mc_func (*qpel_avg)[16];
 206     uint8_t (*mv_penalty)[MAX_MV*2+1];  ///< amount of bits needed to encode a MV
 207     uint8_t *current_mv_penalty;
 208     int (*sub_motion_search)(struct MpegEncContext * s,
 209                                   int *mx_ptr, int *my_ptr, int dmin,
 210                                   int src_index, int ref_index,
 211                                   int size, int h);
 212 }MotionEstContext;
 213
 214 /**
 215  * MpegEncContext.
 216  */
 217 typedef struct MpegEncContext {
 218     struct AVCodecContext *avctx;
 219     /* the following parameters must be initialized before encoding */
 220     int width, height;///< picture size. must be a multiple of 16
 221     int gop_size;
 222     int intra_only;   ///< if true, only intra pictures are generated
 223     int bit_rate;     ///< wanted bit rate
 224     enum OutputFormat out_format; ///< output format
 225     int h263_pred;    ///< use mpeg4/h263 ac/dc predictions
 226
 227 /* the following codec id fields are deprecated in favor of codec_id */
 228     int h263_plus;    ///< h263 plus headers
 229     int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
 230     int h263_flv;     ///< use flv h263 header
 231
 232     enum CodecID codec_id;     /* see CODEC_ID_xxx */
 233     int fixed_qscale; ///< fixed qscale if non zero
 234     int encoding;     ///< true if we are encoding (vs decoding)
 235     int flags;        ///< AVCodecContext.flags (HQ, MV4, ...)
 236     int flags2;       ///< AVCodecContext.flags2
 237     int max_b_frames; ///< max number of b-frames for encoding
 238     int luma_elim_threshold;
 239     int chroma_elim_threshold;
 240     int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
 241     int workaround_bugs;       ///< workaround bugs in encoders which cannot be detected automatically
 242     int codec_tag;             ///< internal codec_tag upper case converted from avctx codec_tag
 243     int stream_codec_tag;      ///< internal stream_codec_tag upper case converted from avctx stream_codec_tag
 244     /* the following fields are managed internally by the encoder */
 245
 246     /** bit output */
 247     PutBitContext pb;
 248
 249     /* sequence parameters */
 250     int context_initialized;
 251     int input_picture_number;  ///< used to set pic->display_picture_number, should not be used for/by anything else
 252     int coded_picture_number;  ///< used to set pic->coded_picture_number, should not be used for/by anything else
 253     int picture_number;       //FIXME remove, unclear definition
 254     int picture_in_gop_number; ///< 0-> first pic in gop, ...
 255     int b_frames_since_non_b;  ///< used for encoding, relative to not yet reordered input
 256     int64_t user_specified_pts;///< last non zero pts from AVFrame which was passed into avcodec_encode_video()
 257     int mb_width, mb_height;   ///< number of MBs horizontally & vertically
 258     int mb_stride;             ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
 259     int b8_stride;             ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
 260     int b4_stride;             ///< 4*mb_width+1 used for some 4x4 block arrays to allow simple addressing
 261     int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
 262     int mb_num;                ///< number of MBs of a picture
 263     int linesize;              ///< line size, in bytes, may be different from width
 264     int uvlinesize;            ///< line size, for chroma in bytes, may be different from width
 265     Picture *picture;          ///< main picture buffer
 266     Picture **input_picture;   ///< next pictures on display order for encoding
 267     Picture **reordered_input_picture; ///< pointer to the next pictures in codedorder for encoding
 268
 269     int start_mb_y;            ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
 270     int end_mb_y;              ///< end   mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
 271     struct MpegEncContext *thread_context[MAX_THREADS];
 272
 273     /**
 274      * copy of the previous picture structure.
 275      * note, linesize & data, might not match the previous picture (for field pictures)
 276      */
 277     Picture last_picture;
 278
 279     /**
 280      * copy of the next picture structure.
 281      * note, linesize & data, might not match the next picture (for field pictures)
 282      */
 283     Picture next_picture;
 284
 285     /**
 286      * copy of the source picture structure for encoding.
 287      * note, linesize & data, might not match the source picture (for field pictures)
 288      */
 289     Picture new_picture;
 290
 291     /**
 292      * copy of the current picture structure.
 293      * note, linesize & data, might not match the current picture (for field pictures)
 294      */
 295     Picture current_picture;    ///< buffer to store the decompressed current picture
 296
 297     Picture *last_picture_ptr;     ///< pointer to the previous picture.
 298     Picture *next_picture_ptr;     ///< pointer to the next picture (for bidir pred)
 299     Picture *current_picture_ptr;  ///< pointer to the current picture
 300     uint8_t *visualization_buffer[3]; //< temporary buffer vor MV visualization
 301     int last_dc[3];                ///< last DC values for MPEG1
 302     int16_t *dc_val_base;
 303     int16_t *dc_val[3];            ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
 304     int16_t dc_cache[4*5];
 305     int y_dc_scale, c_dc_scale;
 306     const uint8_t *y_dc_scale_table;     ///< qscale -> y_dc_scale table
 307     const uint8_t *c_dc_scale_table;     ///< qscale -> c_dc_scale table
 308     const uint8_t *chroma_qscale_table;  ///< qscale -> chroma_qscale (h263)
 309     uint8_t *coded_block_base;
 310     uint8_t *coded_block;          ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
 311     int16_t (*ac_val_base)[16];
 312     int16_t (*ac_val[3])[16];      ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
 313     int ac_pred;
 314     uint8_t *prev_pict_types;     ///< previous picture types in bitstream order, used for mb skip
 315 #define PREV_PICT_TYPES_BUFFER_SIZE 256
 316     int mb_skipped;                ///< MUST BE SET only during DECODING
 317     uint8_t *mbskip_table;        /**< used to avoid copy if macroblock skipped (for black regions for example)
 318                                    and used for b-frame encoding & decoding (contains skip table of next P Frame) */
 319     uint8_t *mbintra_table;       ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
 320     uint8_t *cbp_table;           ///< used to store cbp, ac_pred for partitioned decoding
 321     uint8_t *pred_dir_table;      ///< used to store pred_dir for partitioned decoding
 322     uint8_t *allocated_edge_emu_buffer;
 323     uint8_t *edge_emu_buffer;     ///< points into the middle of allocated_edge_emu_buffer
 324     uint8_t *rd_scratchpad;       ///< scratchpad for rate distortion mb decision
 325     uint8_t *obmc_scratchpad;
 326     uint8_t *b_scratchpad;        ///< scratchpad used for writing into write only buffers
 327
 328     int qscale;                 ///< QP
 329     int chroma_qscale;          ///< chroma QP
 330     unsigned int lambda;        ///< lagrange multipler used in rate distortion
 331     unsigned int lambda2;       ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
 332     int *lambda_table;
 333     int adaptive_quant;         ///< use adaptive quantization
 334     int dquant;                 ///< qscale difference to prev qscale
 335     int pict_type;              ///< I_TYPE, P_TYPE, B_TYPE, ...
 336     int last_pict_type; //FIXME removes
 337     int last_non_b_pict_type;   ///< used for mpeg4 gmc b-frames & ratecontrol
 338     int dropable;
 339     int frame_rate_index;
 340     int last_lambda_for[5];     ///< last lambda for a specific pict type
 341     int skipdct;                ///< skip dct and code zero residual
 342
 343     /* motion compensation */
 344     int unrestricted_mv;        ///< mv can point outside of the coded picture
 345     int h263_long_vectors;      ///< use horrible h263v1 long vector mode
 346     int decode;                 ///< if 0 then decoding will be skipped (for encoding b frames for example)
 347
 348     DSPContext dsp;             ///< pointers for accelerated dsp functions
 349     int f_code;                 ///< forward MV resolution
 350     int b_code;                 ///< backward MV resolution for B Frames (mpeg4)
 351     int16_t (*p_mv_table_base)[2];
 352     int16_t (*b_forw_mv_table_base)[2];
 353     int16_t (*b_back_mv_table_base)[2];
 354     int16_t (*b_bidir_forw_mv_table_base)[2];
 355     int16_t (*b_bidir_back_mv_table_base)[2];
 356     int16_t (*b_direct_mv_table_base)[2];
 357     int16_t (*p_field_mv_table_base[2][2])[2];
 358     int16_t (*b_field_mv_table_base[2][2][2])[2];
 359     int16_t (*p_mv_table)[2];            ///< MV table (1MV per MB) p-frame encoding
 360     int16_t (*b_forw_mv_table)[2];       ///< MV table (1MV per MB) forward mode b-frame encoding
 361     int16_t (*b_back_mv_table)[2];       ///< MV table (1MV per MB) backward mode b-frame encoding
 362     int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
 363     int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
 364     int16_t (*b_direct_mv_table)[2];     ///< MV table (1MV per MB) direct mode b-frame encoding
 365     int16_t (*p_field_mv_table[2][2])[2];   ///< MV table (2MV per MB) interlaced p-frame encoding
 366     int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced b-frame encoding
 367     uint8_t (*p_field_select_table[2]);
 368     uint8_t (*b_field_select_table[2][2]);
 369     int me_method;                       ///< ME algorithm
 370     int mv_dir;
 371 #define MV_DIR_BACKWARD  1
 372 #define MV_DIR_FORWARD   2
 373 #define MV_DIRECT        4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
 374     int mv_type;
 375 #define MV_TYPE_16X16       0   ///< 1 vector for the whole mb
 376 #define MV_TYPE_8X8         1   ///< 4 vectors (h263, mpeg4 4MV)
 377 #define MV_TYPE_16X8        2   ///< 2 vectors, one per 16x8 block
 378 #define MV_TYPE_FIELD       3   ///< 2 vectors, one per field
 379 #define MV_TYPE_DMV         4   ///< 2 vectors, special mpeg2 Dual Prime Vectors
 380     /**motion vectors for a macroblock
 381        first coordinate : 0 = forward 1 = backward
 382        second "         : depend on type
 383        third  "         : 0 = x, 1 = y
 384     */
 385     int mv[2][4][2];
 386     int field_select[2][2];
 387     int last_mv[2][2][2];             ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
 388     uint8_t *fcode_tab;               ///< smallest fcode needed for each MV
 389     int16_t direct_scale_mv[2][64];   ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
 390
 391     MotionEstContext me;
 392
 393     int no_rounding;  /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
 394                         for b-frames rounding mode is always 0 */
 395
 396     int hurry_up;     /**< when set to 1 during decoding, b frames will be skipped
 397                          when set to 2 idct/dequant will be skipped too */
 398
 399     /* macroblock layer */
 400     int mb_x, mb_y;
 401     int mb_skip_run;
 402     int mb_intra;
 403     uint16_t *mb_type;           ///< Table for candidate MB types for encoding
 404 #define CANDIDATE_MB_TYPE_INTRA    0x01
 405 #define CANDIDATE_MB_TYPE_INTER    0x02
 406 #define CANDIDATE_MB_TYPE_INTER4V  0x04
 407 #define CANDIDATE_MB_TYPE_SKIPPED   0x08
 408 //#define MB_TYPE_GMC      0x10
 409
 410 #define CANDIDATE_MB_TYPE_DIRECT   0x10
 411 #define CANDIDATE_MB_TYPE_FORWARD  0x20
 412 #define CANDIDATE_MB_TYPE_BACKWARD 0x40
 413 #define CANDIDATE_MB_TYPE_BIDIR    0x80
 414
 415 #define CANDIDATE_MB_TYPE_INTER_I    0x100
 416 #define CANDIDATE_MB_TYPE_FORWARD_I  0x200
 417 #define CANDIDATE_MB_TYPE_BACKWARD_I 0x400
 418 #define CANDIDATE_MB_TYPE_BIDIR_I    0x800
 419
 420 #define CANDIDATE_MB_TYPE_DIRECT0    0x1000
 421
 422     int block_index[6]; ///< index to current MB in block based arrays with edges
 423     int block_wrap[6];
 424     uint8_t *dest[3];
 425
 426     int *mb_index2xy;        ///< mb_index -> mb_x + mb_y*mb_stride
 427
 428     /** matrix transmitted in the bitstream */
 429     uint16_t intra_matrix[64];
 430     uint16_t chroma_intra_matrix[64];
 431     uint16_t inter_matrix[64];
 432     uint16_t chroma_inter_matrix[64];
 433 #define QUANT_BIAS_SHIFT 8
 434     int intra_quant_bias;    ///< bias for the quantizer
 435     int inter_quant_bias;    ///< bias for the quantizer
 436     int min_qcoeff;          ///< minimum encodable coefficient
 437     int max_qcoeff;          ///< maximum encodable coefficient
 438     int ac_esc_length;       ///< num of bits needed to encode the longest esc
 439     uint8_t *intra_ac_vlc_length;
 440     uint8_t *intra_ac_vlc_last_length;
 441     uint8_t *inter_ac_vlc_length;
 442     uint8_t *inter_ac_vlc_last_length;
 443     uint8_t *luma_dc_vlc_length;
 444     uint8_t *chroma_dc_vlc_length;
 445 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
 446
 447     int coded_score[8];
 448
 449     /** precomputed matrix (combine qscale and DCT renorm) */
 450     int (*q_intra_matrix)[64];
 451     int (*q_inter_matrix)[64];
 452     /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
 453     uint16_t (*q_intra_matrix16)[2][64];
 454     uint16_t (*q_inter_matrix16)[2][64];
 455     int block_last_index[12];  ///< last non zero coefficient in block
 456     /* scantables */
 457     DECLARE_ALIGNED_8(ScanTable, intra_scantable);
 458     ScanTable intra_h_scantable;
 459     ScanTable intra_v_scantable;
 460     ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
 461
 462     /* noise reduction */
 463     int (*dct_error_sum)[64];
 464     int dct_count[2];
 465     uint16_t (*dct_offset)[64];
 466
 467     void *opaque;              ///< private data for the user
 468
 469     /* bit rate control */
 470     int64_t wanted_bits;
 471     int64_t total_bits;
 472     int frame_bits;                ///< bits used for the current frame
 473     int next_lambda;               ///< next lambda used for retrying to encode a frame
 474     RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
 475
 476     /* statistics, used for 2-pass encoding */
 477     int mv_bits;
 478     int header_bits;
 479     int i_tex_bits;
 480     int p_tex_bits;
 481     int i_count;
 482     int f_count;
 483     int b_count;
 484     int skip_count;
 485     int misc_bits; ///< cbp, mb_type
 486     int last_bits; ///< temp var used for calculating the above vars
 487
 488     /* error concealment / resync */
 489     int error_count;
 490     uint8_t *error_status_table;       ///< table of the error status of each MB
 491 #define VP_START            1          ///< current MB is the first after a resync marker
 492 #define AC_ERROR            2
 493 #define DC_ERROR            4
 494 #define MV_ERROR            8
 495 #define AC_END              16
 496 #define DC_END              32
 497 #define MV_END              64
 498 //FIXME some prefix?
 499
 500     int resync_mb_x;                 ///< x position of last resync marker
 501     int resync_mb_y;                 ///< y position of last resync marker
 502     GetBitContext last_resync_gb;    ///< used to search for the next resync marker
 503     int mb_num_left;                 ///< number of MBs left in this video packet (for partitioned Slices only)
 504     int next_p_frame_damaged;        ///< set if the next p frame is damaged, to avoid showing trashed b frames
 505     int error_resilience;
 506
 507     ParseContext parse_context;
 508
 509     /* H.263 specific */
 510     int gob_index;
 511     int obmc;                       ///< overlapped block motion compensation
 512
 513     /* H.263+ specific */
 514     int umvplus;                    ///< == H263+ && unrestricted_mv
 515     int h263_aic;                   ///< Advanded INTRA Coding (AIC)
 516     int h263_aic_dir;               ///< AIC direction: 0 = left, 1 = top
 517     int h263_slice_structured;
 518     int alt_inter_vlc;              ///< alternative inter vlc
 519     int modified_quant;
 520     int loop_filter;
 521     int custom_pcf;
 522
 523     /* mpeg4 specific */
 524     int time_increment_bits;        ///< number of bits to represent the fractional part of time
 525     int last_time_base;
 526     int time_base;                  ///< time in seconds of last I,P,S Frame
 527     int64_t time;                   ///< time of current frame
 528     int64_t last_non_b_time;
 529     uint16_t pp_time;               ///< time distance between the last 2 p,s,i frames
 530     uint16_t pb_time;               ///< time distance between the last b and p,s,i frame
 531     uint16_t pp_field_time;
 532     uint16_t pb_field_time;         ///< like above, just for interlaced
 533     int shape;
 534     int vol_sprite_usage;
 535     int sprite_width;
 536     int sprite_height;
 537     int sprite_left;
 538     int sprite_top;
 539     int sprite_brightness_change;
 540     int num_sprite_warping_points;
 541     int real_sprite_warping_points;
 542     int sprite_offset[2][2];         ///< sprite offset[isChroma][isMVY]
 543     int sprite_delta[2][2];          ///< sprite_delta [isY][isMVY]
 544     int sprite_shift[2];             ///< sprite shift [isChroma]
 545     int mcsel;
 546     int quant_precision;
 547     int quarter_sample;              ///< 1->qpel, 0->half pel ME/MC
 548     int scalability;
 549     int hierachy_type;
 550     int enhancement_type;
 551     int new_pred;
 552     int reduced_res_vop;
 553     int aspect_ratio_info; //FIXME remove
 554     int sprite_warping_accuracy;
 555     int low_latency_sprite;
 556     int data_partitioning;           ///< data partitioning flag from header
 557     int partitioned_frame;           ///< is current frame partitioned
 558     int rvlc;                        ///< reversible vlc
 559     int resync_marker;               ///< could this stream contain resync markers
 560     int low_delay;                   ///< no reordering needed / has no b-frames
 561     int vo_type;
 562     int vol_control_parameters;      ///< does the stream contain the low_delay flag, used to workaround buggy encoders
 563     int intra_dc_threshold;          ///< QP above whch the ac VLC should be used for intra dc
 564     int use_intra_dc_vlc;
 565     PutBitContext tex_pb;            ///< used for data partitioned VOPs
 566     PutBitContext pb2;               ///< used for data partitioned VOPs
 567     int mpeg_quant;
 568     int t_frame;                       ///< time distance of first I -> B, used for interlaced b frames
 569     int padding_bug_score;             ///< used to detect the VERY common padding bug in MPEG4
 570
 571     /* divx specific, used to workaround (many) bugs in divx5 */
 572     int divx_version;
 573     int divx_build;
 574     int divx_packed;
 575     uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
 576     int bitstream_buffer_size;
 577     unsigned int allocated_bitstream_buffer_size;
 578
 579     int xvid_build;
 580
 581     /* lavc specific stuff, used to workaround bugs in libavcodec */
 582     int lavc_build;
 583
 584     /* RV10 specific */
 585     int rv10_version; ///< RV10 version: 0 or 3
 586     int rv10_first_dc_coded[3];
 587
 588     /* MJPEG specific */
 589     struct MJpegContext *mjpeg_ctx;
 590     int mjpeg_vsample[3];       ///< vertical sampling factors, default = {2, 1, 1}
 591     int mjpeg_hsample[3];       ///< horizontal sampling factors, default = {2, 1, 1}
 592
 593     /* MSMPEG4 specific */
 594     int mv_table_index;
 595     int rl_table_index;
 596     int rl_chroma_table_index;
 597     int dc_table_index;
 598     int use_skip_mb_code;
 599     int slice_height;      ///< in macroblocks
 600     int first_slice_line;  ///< used in mpeg4 too to handle resync markers
 601     int flipflop_rounding;
 602     int msmpeg4_version;   ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
 603     int per_mb_rl_table;
 604     int esc3_level_length;
 605     int esc3_run_length;
 606     /** [mb_intra][isChroma][level][run][last] */
 607     int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
 608     int inter_intra_pred;
 609     int mspel;
 610
 611     /* decompression specific */
 612     GetBitContext gb;
 613
 614     /* Mpeg1 specific */
 615     int gop_picture_number;  ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
 616     int last_mv_dir;         ///< last mv_dir, used for b frame encoding
 617     int broken_link;         ///< no_output_of_prior_pics_flag
 618     uint8_t *vbv_delay_ptr;  ///< pointer to vbv_delay in the bitstream
 619
 620     /* MPEG2 specific - I wish I had not to support this mess. */
 621     int progressive_sequence;
 622     int mpeg_f_code[2][2];
 623     int picture_structure;
 624 /* picture type */
 625 #define PICT_TOP_FIELD     1
 626 #define PICT_BOTTOM_FIELD  2
 627 #define PICT_FRAME         3
 628
 629     int intra_dc_precision;
 630     int frame_pred_frame_dct;
 631     int top_field_first;
 632     int concealment_motion_vectors;
 633     int q_scale_type;
 634     int intra_vlc_format;
 635     int alternate_scan;
 636     int repeat_first_field;
 637     int chroma_420_type;
 638     int chroma_format;
 639 #define CHROMA_420 1
 640 #define CHROMA_422 2
 641 #define CHROMA_444 3
 642     int chroma_x_shift;//depend on pix_format, that depend on chroma_format
 643     int chroma_y_shift;
 644
 645     int progressive_frame;
 646     int full_pel[2];
 647     int interlaced_dct;
 648     int first_slice;
 649     int first_field;         ///< is 1 for the first field of a field picture 0 otherwise
 650
 651     /* RTP specific */
 652     int rtp_mode;
 653
 654     uint8_t *ptr_lastgob;
 655     int swap_uv;//vcr2 codec is mpeg2 varint with UV swaped
 656     short * pblocks[12];
 657
 658     DCTELEM (*block)[64]; ///< points to one of the following blocks
 659     DCTELEM (*blocks)[8][64]; // for HQ mode we need to keep the best block
 660     int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
 661 #define SLICE_OK         0
 662 #define SLICE_ERROR     -1
 663 #define SLICE_END       -2 ///<end marker found
 664 #define SLICE_NOEND     -3 ///<no end marker or error found but mb count exceeded
 665
 666     void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
 667                            DCTELEM *block/*align 16*/, int n, int qscale);
 668     void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
 669                            DCTELEM *block/*align 16*/, int n, int qscale);
 670     void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
 671                            DCTELEM *block/*align 16*/, int n, int qscale);
 672     void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
 673                            DCTELEM *block/*align 16*/, int n, int qscale);
 674     void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
 675                            DCTELEM *block/*align 16*/, int n, int qscale);
 676     void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
 677                            DCTELEM *block/*align 16*/, int n, int qscale);
 678     void (*dct_unquantize_h261_intra)(struct MpegEncContext *s,
 679                            DCTELEM *block/*align 16*/, int n, int qscale);
 680     void (*dct_unquantize_h261_inter)(struct MpegEncContext *s,
 681                            DCTELEM *block/*align 16*/, int n, int qscale);
 682     void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
 683                            DCTELEM *block/*align 16*/, int n, int qscale);
 684     void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
 685                            DCTELEM *block/*align 16*/, int n, int qscale);
 686     int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
 687     int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
 688     void (*denoise_dct)(struct MpegEncContext *s, DCTELEM *block);
 689 } MpegEncContext;
 690
 691
 692 void MPV_decode_defaults(MpegEncContext *s);
 693 int MPV_common_init(MpegEncContext *s);
 694 void MPV_common_end(MpegEncContext *s);
 695 void MPV_decode_mb(MpegEncContext *s, DCTELEM block[12][64]);
 696 int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
 697 void MPV_frame_end(MpegEncContext *s);
 698 int MPV_encode_init(AVCodecContext *avctx);
 699 int MPV_encode_end(AVCodecContext *avctx);
 700 int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
 701 #ifdef HAVE_MMX
 702 void MPV_common_init_mmx(MpegEncContext *s);
 703 #endif
 704 #ifdef ARCH_ALPHA
 705 void MPV_common_init_axp(MpegEncContext *s);
 706 #endif
 707 #ifdef HAVE_MLIB
 708 void MPV_common_init_mlib(MpegEncContext *s);
 709 #endif
 710 #ifdef HAVE_MMI
 711 void MPV_common_init_mmi(MpegEncContext *s);
 712 #endif
 713 #ifdef ARCH_ARMV4L
 714 void MPV_common_init_armv4l(MpegEncContext *s);
 715 #endif
 716 #ifdef ARCH_POWERPC
 717 void MPV_common_init_ppc(MpegEncContext *s);
 718 #endif
 719 extern void (*draw_edges)(uint8_t *buf, int wrap, int width, int height, int w);
 720 void ff_clean_intra_table_entries(MpegEncContext *s);
 721 void ff_init_scantable(uint8_t *, ScanTable *st, const uint8_t *src_scantable);
 722 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
 723 void ff_emulated_edge_mc(uint8_t *buf, uint8_t *src, int linesize, int block_w, int block_h,
 724                                     int src_x, int src_y, int w, int h);
 725 void ff_mpeg_flush(AVCodecContext *avctx);
 726 void ff_print_debug_info(MpegEncContext *s, AVFrame *pict);
 727 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
 728 int ff_find_unused_picture(MpegEncContext *s, int shared);
 729 void ff_denoise_dct(MpegEncContext *s, DCTELEM *block);
 730 void ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
 731 const uint8_t *ff_find_start_code(const uint8_t *p, const uint8_t *end, uint32_t *state);
 732
 733 void ff_er_frame_start(MpegEncContext *s);
 734 void ff_er_frame_end(MpegEncContext *s);
 735 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
 736
 737
 738 extern enum PixelFormat ff_yuv420p_list[2];
 739
 740 void ff_init_block_index(MpegEncContext *s);
 741
 742 static inline void ff_update_block_index(MpegEncContext *s){
 743     const int block_size= 8>>s->avctx->lowres;
 744
 745     s->block_index[0]+=2;
 746     s->block_index[1]+=2;
 747     s->block_index[2]+=2;
 748     s->block_index[3]+=2;
 749     s->block_index[4]++;
 750     s->block_index[5]++;
 751     s->dest[0]+= 2*block_size;
 752     s->dest[1]+= block_size;
 753     s->dest[2]+= block_size;
 754 }
 755
 756 static inline int get_bits_diff(MpegEncContext *s){
 757     const int bits= put_bits_count(&s->pb);
 758     const int last= s->last_bits;
 759
 760     s->last_bits = bits;
 761
 762     return bits - last;
 763 }
 764
 765 static inline int ff_h263_round_chroma(int x){
 766     static const uint8_t h263_chroma_roundtab[16] = {
 767     //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
 768         0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1,
 769     };
 770     return h263_chroma_roundtab[x & 0xf] + (x >> 3);
 771 }
 772
 773 /* motion_est.c */
 774 void ff_estimate_p_frame_motion(MpegEncContext * s,
 775                              int mb_x, int mb_y);
 776 void ff_estimate_b_frame_motion(MpegEncContext * s,
 777                              int mb_x, int mb_y);
 778 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
 779 void ff_fix_long_p_mvs(MpegEncContext * s);
 780 void ff_fix_long_mvs(MpegEncContext * s, uint8_t *field_select_table, int field_select,
 781                      int16_t (*mv_table)[2], int f_code, int type, int truncate);
 782 void ff_init_me(MpegEncContext *s);
 783 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
 784 inline int ff_epzs_motion_search(MpegEncContext * s, int *mx_ptr, int *my_ptr,
 785                              int P[10][2], int src_index, int ref_index, int16_t (*last_mv)[2],
 786                              int ref_mv_scale, int size, int h);
 787 inline int ff_get_mb_score(MpegEncContext * s, int mx, int my, int src_index,
 788                                int ref_index, int size, int h, int add_rate);
 789
 790 /* mpeg12.c */
 791 extern const uint16_t ff_mpeg1_default_intra_matrix[64];
 792 extern const uint16_t ff_mpeg1_default_non_intra_matrix[64];
 793 extern const uint8_t ff_mpeg1_dc_scale_table[128];
 794 extern const AVRational ff_frame_rate_tab[];
 795
 796 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
 797 void mpeg1_encode_mb(MpegEncContext *s,
 798                      DCTELEM block[6][64],
 799                      int motion_x, int motion_y);
 800 void ff_mpeg1_encode_init(MpegEncContext *s);
 801 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
 802 void ff_mpeg1_clean_buffers(MpegEncContext *s);
 803 int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size);
 804
 805 #include "rl.h"
 806
 807 extern const uint8_t ff_mpeg4_y_dc_scale_table[32];
 808 extern const uint8_t ff_mpeg4_c_dc_scale_table[32];
 809 extern const uint8_t ff_aic_dc_scale_table[32];
 810 extern const int16_t ff_mpeg4_default_intra_matrix[64];
 811 extern const int16_t ff_mpeg4_default_non_intra_matrix[64];
 812 extern const uint8_t ff_h263_chroma_qscale_table[32];
 813 extern const uint8_t ff_h263_loop_filter_strength[32];
 814
 815 /* h261.c */
 816 void ff_h261_loop_filter(MpegEncContext *s);
 817 void ff_h261_reorder_mb_index(MpegEncContext* s);
 818 void ff_h261_encode_mb(MpegEncContext *s,
 819                     DCTELEM block[6][64],
 820                     int motion_x, int motion_y);
 821 void ff_h261_encode_picture_header(MpegEncContext * s, int picture_number);
 822 void ff_h261_encode_init(MpegEncContext *s);
 823 int ff_h261_get_picture_format(int width, int height);
 824
 825
 826 /* h263.c, h263dec.c */
 827 int ff_h263_decode_init(AVCodecContext *avctx);
 828 int ff_h263_decode_frame(AVCodecContext *avctx,
 829                              void *data, int *data_size,
 830                              uint8_t *buf, int buf_size);
 831 int ff_h263_decode_end(AVCodecContext *avctx);
 832 void h263_encode_mb(MpegEncContext *s,
 833                     DCTELEM block[6][64],
 834                     int motion_x, int motion_y);
 835 void mpeg4_encode_mb(MpegEncContext *s,
 836                     DCTELEM block[6][64],
 837                     int motion_x, int motion_y);
 838 void h263_encode_picture_header(MpegEncContext *s, int picture_number);
 839 void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number);
 840 void h263_encode_gob_header(MpegEncContext * s, int mb_line);
 841 int16_t *h263_pred_motion(MpegEncContext * s, int block, int dir,
 842                         int *px, int *py);
 843 void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
 844                    int dir);
 845 void ff_set_mpeg4_time(MpegEncContext * s);
 846 void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
 847 #ifdef CONFIG_ENCODERS
 848 void h263_encode_init(MpegEncContext *s);
 849 #else
 850 static void h263_encode_init(MpegEncContext *s) {assert(0);}
 851 #endif
 852 void h263_decode_init_vlc(MpegEncContext *s);
 853 int h263_decode_picture_header(MpegEncContext *s);
 854 int ff_h263_decode_gob_header(MpegEncContext *s);
 855 int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
 856 void ff_h263_update_motion_val(MpegEncContext * s);
 857 void ff_h263_loop_filter(MpegEncContext * s);
 858 void ff_set_qscale(MpegEncContext * s, int qscale);
 859 int ff_h263_decode_mba(MpegEncContext *s);
 860 void ff_h263_encode_mba(MpegEncContext *s);
 861
 862 int intel_h263_decode_picture_header(MpegEncContext *s);
 863 int flv_h263_decode_picture_header(MpegEncContext *s);
 864 int ff_h263_decode_mb(MpegEncContext *s,
 865                       DCTELEM block[6][64]);
 866 int ff_mpeg4_decode_mb(MpegEncContext *s,
 867                       DCTELEM block[6][64]);
 868 int h263_get_picture_format(int width, int height);
 869 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
 870 void ff_mpeg4_clean_buffers(MpegEncContext *s);
 871 void ff_mpeg4_stuffing(PutBitContext * pbc);
 872 void ff_mpeg4_init_partitions(MpegEncContext *s);
 873 void ff_mpeg4_merge_partitions(MpegEncContext *s);
 874 void ff_clean_mpeg4_qscales(MpegEncContext *s);
 875 void ff_clean_h263_qscales(MpegEncContext *s);
 876 int ff_mpeg4_decode_partitions(MpegEncContext *s);
 877 int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
 878 int ff_h263_resync(MpegEncContext *s);
 879 int ff_h263_get_gob_height(MpegEncContext *s);
 880 void ff_mpeg4_init_direct_mv(MpegEncContext *s);
 881 int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
 882 void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);
 883
 884
 885 /* rv10.c */
 886 void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
 887 int rv_decode_dc(MpegEncContext *s, int n);
 888 void rv20_encode_picture_header(MpegEncContext *s, int picture_number);
 889
 890
 891 /* msmpeg4.c */
 892 void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
 893 void msmpeg4_encode_ext_header(MpegEncContext * s);
 894 void msmpeg4_encode_mb(MpegEncContext * s,
 895                        DCTELEM block[6][64],
 896                        int motion_x, int motion_y);
 897 int msmpeg4_decode_picture_header(MpegEncContext * s);
 898 int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
 899 int ff_msmpeg4_decode_init(MpegEncContext *s);
 900 void ff_msmpeg4_encode_init(MpegEncContext *s);
 901 int ff_wmv2_decode_picture_header(MpegEncContext * s);
 902 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
 903 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
 904 void ff_mspel_motion(MpegEncContext *s,
 905                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 906                                uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
 907                                int motion_x, int motion_y, int h);
 908 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
 909 void ff_wmv2_encode_mb(MpegEncContext * s,
 910                        DCTELEM block[6][64],
 911                        int motion_x, int motion_y);
 912
 913 #endif /* AVCODEC_MPEGVIDEO_H */
 914