libavcodec/mpegvideo.h

   1 /*
   2  * Generic DCT based hybrid video encoder
   3  * Copyright (c) 2000, 2001, 2002 Fabrice Bellard.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  18  */
  19
  20 /**
  21  * @file mpegvideo.h
  22  * mpegvideo header.
  23  */
  24
  25 #ifndef AVCODEC_MPEGVIDEO_H
  26 #define AVCODEC_MPEGVIDEO_H
  27
  28 #include "dsputil.h"
  29
  30 #define FRAME_SKIPED 100 ///< return value for header parsers if frame is not coded
  31
  32 enum OutputFormat {
  33     FMT_MPEG1,
  34     FMT_H263,
  35     FMT_MJPEG,
  36     FMT_H264,
  37 };
  38
  39 #define EDGE_WIDTH 16
  40
  41 #define MPEG_BUF_SIZE (16 * 1024)
  42
  43 #define QMAT_SHIFT_MMX 16
  44 #define QMAT_SHIFT 22
  45
  46 #define MAX_FCODE 7
  47 #define MAX_MV 2048
  48
  49 #define MAX_PICTURE_COUNT 15
  50
  51 #define ME_MAP_SIZE 64
  52 #define ME_MAP_SHIFT 3
  53 #define ME_MAP_MV_BITS 11
  54
  55 /* run length table */
  56 #define MAX_RUN    64
  57 #define MAX_LEVEL  64
  58
  59 #define I_TYPE FF_I_TYPE  ///< Intra
  60 #define P_TYPE FF_P_TYPE  ///< Predicted
  61 #define B_TYPE FF_B_TYPE  ///< Bi-dir predicted
  62 #define S_TYPE FF_S_TYPE  ///< S(GMC)-VOP MPEG4
  63 #define SI_TYPE FF_SI_TYPE  ///< Switching Intra
  64 #define SP_TYPE FF_SP_TYPE  ///< Switching Predicted
  65
  66 typedef struct Predictor{
  67     double coeff;
  68     double count;
  69     double decay;
  70 } Predictor;
  71
  72 typedef struct RateControlEntry{
  73     int pict_type;
  74     float qscale;
  75     int mv_bits;
  76     int i_tex_bits;
  77     int p_tex_bits;
  78     int misc_bits;
  79     uint64_t expected_bits;
  80     int new_pict_type;
  81     float new_qscale;
  82     int mc_mb_var_sum;
  83     int mb_var_sum;
  84     int i_count;
  85     int f_code;
  86     int b_code;
  87 }RateControlEntry;
  88
  89 /**
  90  * rate control context.
  91  */
  92 typedef struct RateControlContext{
  93     FILE *stats_file;
  94     int num_entries;              ///< number of RateControlEntries
  95     RateControlEntry *entry;
  96     int buffer_index;             ///< amount of bits in the video/audio buffer
  97     Predictor pred[5];
  98     double short_term_qsum;       ///< sum of recent qscales
  99     double short_term_qcount;     ///< count of recent qscales
 100     double pass1_rc_eq_output_sum;///< sum of the output of the rc equation, this is used for normalization
 101     double pass1_wanted_bits;     ///< bits which should have been outputed by the pass1 code (including complexity init)
 102     double last_qscale;
 103     double last_qscale_for[5];    ///< last qscale for a specific pict type, used for max_diff & ipb factor stuff
 104     int last_mc_mb_var_sum;
 105     int last_mb_var_sum;
 106     uint64_t i_cplx_sum[5];
 107     uint64_t p_cplx_sum[5];
 108     uint64_t mv_bits_sum[5];
 109     uint64_t qscale_sum[5];
 110     int frame_count[5];
 111     int last_non_b_pict_type;
 112 }RateControlContext;
 113
 114 /**
 115  * Scantable.
 116  */
 117 typedef struct ScanTable{
 118     const uint8_t *scantable;
 119     uint8_t permutated[64];
 120     uint8_t raster_end[64];
 121 #ifdef ARCH_POWERPC
 122                 /** Used by dct_quantise_alitvec to find last-non-zero */
 123     uint8_t __align8 inverse[64];
 124 #endif
 125 } ScanTable;
 126
 127 /**
 128  * Picture.
 129  */
 130 typedef struct Picture{
 131     FF_COMMON_FRAME
 132
 133     /**
 134      * halfpel luma planes.
 135      */
 136     uint8_t *interpolated[3];
 137
 138     int16_t (*motion_val[2])[2];
 139     int8_t *ref_index[2];
 140     uint32_t *mb_type_base;
 141     uint32_t *mb_type;           ///< mb_type_base + mb_width + 2, note: only used for decoding currently
 142 #define MB_TYPE_INTRA4x4   0x0001
 143 #define MB_TYPE_INTRA16x16 0x0002 //FIXME h264 specific
 144 #define MB_TYPE_INTRA_PCM  0x0004 //FIXME h264 specific
 145 #define MB_TYPE_16x16      0x0008
 146 #define MB_TYPE_16x8       0x0010
 147 #define MB_TYPE_8x16       0x0020
 148 #define MB_TYPE_8x8        0x0040
 149 #define MB_TYPE_INTERLACED 0x0080
 150 #define MB_TYPE_DIRECT2     0x0100 //FIXME
 151 #define MB_TYPE_ACPRED     0x0200
 152 #define MB_TYPE_GMC        0x0400 //FIXME mpeg4 specific
 153 #define MB_TYPE_SKIP       0x0800
 154 #define MB_TYPE_P0L0       0x1000
 155 #define MB_TYPE_P1L0       0x2000
 156 #define MB_TYPE_P0L1       0x4000
 157 #define MB_TYPE_P1L1       0x8000
 158 #define MB_TYPE_L0         (MB_TYPE_P0L0 | MB_TYPE_P1L0)
 159 #define MB_TYPE_L1         (MB_TYPE_P0L1 | MB_TYPE_P1L1)
 160 #define MB_TYPE_L0L1       (MB_TYPE_L0   | MB_TYPE_L1)
 161 #define MB_TYPE_QUANT      0x00010000
 162 //Note bits 24-31 are reserved for codec specific use (h264 ref0, mpeg1 pat, ...)
 163
 164 #define IS_INTRA4x4(a)   ((a)&MB_TYPE_INTRA4x4)
 165 #define IS_INTRA16x16(a) ((a)&MB_TYPE_INTRA16x16)
 166 #define IS_PCM(a)        ((a)&MB_TYPE_INTRA_PCM)
 167 #define IS_INTRA(a)      ((a)&7)
 168 #define IS_INTER(a)      ((a)&(MB_TYPE_16x16|MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8))
 169 #define IS_SKIP(a)       ((a)&MB_TYPE_SKIP)
 170 #define IS_INTRA_PCM(a)  ((a)&MB_TYPE_INTRA_PCM)
 171 #define IS_INTERLACED(a) ((a)&MB_TYPE_INTERLACED)
 172 #define IS_DIRECT(a)     ((a)&MB_TYPE_DIRECT2)
 173 #define IS_GMC(a)        ((a)&MB_TYPE_GMC)
 174 #define IS_16X16(a)      ((a)&MB_TYPE_16x16)
 175 #define IS_16X8(a)       ((a)&MB_TYPE_16x8)
 176 #define IS_8X16(a)       ((a)&MB_TYPE_8x16)
 177 #define IS_8X8(a)        ((a)&MB_TYPE_8x8)
 178 #define IS_SUB_8X8(a)    ((a)&MB_TYPE_16x16) //note reused
 179 #define IS_SUB_8X4(a)    ((a)&MB_TYPE_16x8)  //note reused
 180 #define IS_SUB_4X8(a)    ((a)&MB_TYPE_8x16)  //note reused
 181 #define IS_SUB_4X4(a)    ((a)&MB_TYPE_8x8)   //note reused
 182 #define IS_ACPRED(a)     ((a)&MB_TYPE_ACPRED)
 183 #define IS_QUANT(a)      ((a)&MB_TYPE_QUANT)
 184 #define IS_DIR(a, part, list) ((a) & (MB_TYPE_P0L0<<((part)+2*(list))))
 185 #define USES_LIST(a, list) ((a) & ((MB_TYPE_P0L0|MB_TYPE_P1L0)<<(2*(list)))) ///< does this mb use listX, note doesnt work if subMBs
 186
 187
 188     int field_poc[2];           ///< h264 top/bottom POC
 189     int poc;                    ///< h264 frame POC
 190     int frame_num;              ///< h264 frame_num
 191     int pic_id;                 ///< h264 pic_num or long_term_pic_idx
 192     int long_ref;               ///< 1->long term reference 0->short term reference
 193
 194     int mb_var_sum;             ///< sum of MB variance for current frame
 195     int mc_mb_var_sum;          ///< motion compensated MB variance for current frame
 196     uint16_t *mb_var;           ///< Table for MB variances
 197     uint16_t *mc_mb_var;        ///< Table for motion compensated MB variances
 198     uint8_t *mb_mean;           ///< Table for MB luminance
 199     int32_t *mb_cmp_score;      ///< Table for MB cmp scores, for mb decission
 200     int b_frame_score;          /* */
 201 } Picture;
 202
 203 typedef struct ParseContext{
 204     uint8_t *buffer;
 205     int index;
 206     int last_index;
 207     int buffer_size;
 208     uint32_t state;             ///< contains the last few bytes in MSB order
 209     int frame_start_found;
 210     int overread;               ///< the number of bytes which where irreversibly read from the next frame
 211     int overread_index;         ///< the index into ParseContext.buffer of the overreaded bytes
 212 } ParseContext;
 213
 214 struct MpegEncContext;
 215
 216 /**
 217  * Motion estimation context.
 218  */
 219 typedef struct MotionEstContext{
 220     int skip;                          ///< set if ME is skiped for the current MB
 221     int co_located_mv[4][2];           ///< mv from last p frame for direct mode ME
 222     int direct_basis_mv[4][2];
 223     uint8_t *scratchpad;               ///< data area for the me algo, so that the ME doesnt need to malloc/free
 224     uint32_t *map;                     ///< map to avoid duplicate evaluations
 225     uint32_t *score_map;               ///< map to store the scores
 226     int map_generation;
 227     int pre_penalty_factor;
 228     int penalty_factor;
 229     int sub_penalty_factor;
 230     int mb_penalty_factor;
 231     int pre_pass;                      ///< = 1 for the pre pass
 232     int dia_size;
 233     uint8_t (*mv_penalty)[MAX_MV*2+1];  ///< amount of bits needed to encode a MV
 234     int (*sub_motion_search)(struct MpegEncContext * s,
 235                                   int *mx_ptr, int *my_ptr, int dmin,
 236                                   int xmin, int ymin, int xmax, int ymax,
 237                                   int pred_x, int pred_y, Picture *ref_picture,
 238                                   int n, int size, uint8_t * const mv_penalty);
 239     int (*motion_search[7])(struct MpegEncContext * s, int block,
 240                              int *mx_ptr, int *my_ptr,
 241                              int P[10][2], int pred_x, int pred_y,
 242                              int xmin, int ymin, int xmax, int ymax, Picture *ref_picture, int16_t (*last_mv)[2],
 243                              int ref_mv_scale, uint8_t * const mv_penalty);
 244     int (*pre_motion_search)(struct MpegEncContext * s, int block,
 245                              int *mx_ptr, int *my_ptr,
 246                              int P[10][2], int pred_x, int pred_y,
 247                              int xmin, int ymin, int xmax, int ymax, Picture *ref_picture, int16_t (*last_mv)[2],
 248                              int ref_mv_scale, uint8_t * const mv_penalty);
 249     int (*get_mb_score)(struct MpegEncContext * s, int mx, int my, int pred_x, int pred_y, Picture *ref_picture,
 250                                   uint8_t * const mv_penalty);
 251 }MotionEstContext;
 252
 253 /**
 254  * MpegEncContext.
 255  */
 256 typedef struct MpegEncContext {
 257     struct AVCodecContext *avctx;
 258     /* the following parameters must be initialized before encoding */
 259     int width, height;///< picture size. must be a multiple of 16
 260     int gop_size;
 261     int intra_only;   ///< if true, only intra pictures are generated
 262     int bit_rate;     ///< wanted bit rate
 263     int bit_rate_tolerance; ///< amount of +- bits (>0)
 264     enum OutputFormat out_format; ///< output format
 265     int h263_pred;    ///< use mpeg4/h263 ac/dc predictions
 266
 267 /* the following codec id fields are deprecated in favor of codec_id */
 268     int h263_plus;    ///< h263 plus headers
 269     int h263_rv10;    ///< use RV10 variation for H263
 270     int h263_msmpeg4; ///< generate MSMPEG4 compatible stream (deprecated, use msmpeg4_version instead)
 271     int h263_intel;   ///< use I263 intel h263 header
 272     int h263_flv;     ///< use flv h263 header
 273
 274     int codec_id;     /* see CODEC_ID_xxx */
 275     int fixed_qscale; ///< fixed qscale if non zero
 276     float qcompress;  ///< amount of qscale change between easy & hard scenes (0.0-1.0)
 277     float qblur;      ///< amount of qscale smoothing over time (0.0-1.0)
 278     int max_qdiff;    ///< max qscale difference between frames
 279     int encoding;     ///< true if we are encoding (vs decoding)
 280     int flags;        ///< AVCodecContext.flags (HQ, MV4, ...)
 281     int max_b_frames; ///< max number of b-frames for encoding
 282     int b_frame_strategy;
 283     int luma_elim_threshold;
 284     int chroma_elim_threshold;
 285     int strict_std_compliance; ///< strictly follow the std (MPEG4, ...)
 286     int workaround_bugs;       ///< workaround bugs in encoders which cannot be detected automatically
 287     /* the following fields are managed internally by the encoder */
 288
 289     /** bit output */
 290     PutBitContext pb;
 291
 292     /* sequence parameters */
 293     int context_initialized;
 294     int input_picture_number;
 295     int picture_number;
 296     int picture_in_gop_number; ///< 0-> first pic in gop, ...
 297     int b_frames_since_non_b;  ///< used for encoding, relative to not yet reordered input
 298     int mb_width, mb_height;   ///< number of MBs horizontally & vertically
 299     int mb_stride;             ///< mb_width+1 used for some arrays to allow simple addressng of left & top MBs withoutt sig11
 300     int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replicateion)
 301     int mb_num;                ///< number of MBs of a picture
 302     int linesize;              ///< line size, in bytes, may be different from width
 303     int uvlinesize;            ///< line size, for chroma in bytes, may be different from width
 304     Picture picture[MAX_PICTURE_COUNT]; ///< main picture buffer
 305     Picture *input_picture[MAX_PICTURE_COUNT]; ///< next pictures on display order for encoding
 306     Picture *reordered_input_picture[MAX_PICTURE_COUNT]; ///< pointer to the next pictures in codedorder for encoding
 307
 308     /**
 309      * copy of the previous picture structure.
 310      * note, linesize & data, might not match the previous picture (for field pictures)
 311      */
 312     Picture last_picture;
 313
 314     /**
 315      * copy of the next picture structure.
 316      * note, linesize & data, might not match the next picture (for field pictures)
 317      */
 318     Picture next_picture;
 319
 320     /**
 321      * copy of the source picture structure for encoding.
 322      * note, linesize & data, might not match the source picture (for field pictures)
 323      */
 324     Picture new_picture;
 325
 326     /**
 327      * copy of the current picture structure.
 328      * note, linesize & data, might not match the current picture (for field pictures)
 329      */
 330     Picture current_picture;    ///< buffer to store the decompressed current picture
 331
 332     Picture *last_picture_ptr;     ///< pointer to the previous picture.
 333     Picture *next_picture_ptr;     ///< pointer to the next picture (for bidir pred)
 334     Picture *current_picture_ptr;  ///< pointer to the current picture
 335     int last_dc[3];                ///< last DC values for MPEG1
 336     int16_t *dc_val[3];            ///< used for mpeg4 DC prediction, all 3 arrays must be continuous
 337     int16_t dc_cache[4*5];
 338     int y_dc_scale, c_dc_scale;
 339     uint8_t *y_dc_scale_table;     ///< qscale -> y_dc_scale table
 340     uint8_t *c_dc_scale_table;     ///< qscale -> c_dc_scale table
 341     uint8_t *coded_block;          ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
 342     int16_t (*ac_val[3])[16];      ///< used for for mpeg4 AC prediction, all 3 arrays must be continuous
 343     int ac_pred;
 344     uint8_t *prev_pict_types;     ///< previous picture types in bitstream order, used for mb skip
 345 #define PREV_PICT_TYPES_BUFFER_SIZE 256
 346     int mb_skiped;                ///< MUST BE SET only during DECODING
 347     uint8_t *mbskip_table;        /**< used to avoid copy if macroblock skipped (for black regions for example)
 348                                    and used for b-frame encoding & decoding (contains skip table of next P Frame) */
 349     uint8_t *mbintra_table;       ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
 350     uint8_t *cbp_table;           ///< used to store cbp, ac_pred for partitioned decoding
 351     uint8_t *pred_dir_table;      ///< used to store pred_dir for partitioned decoding
 352     uint8_t *allocated_edge_emu_buffer;
 353     uint8_t *edge_emu_buffer;     ///< points into the middle of allocated_edge_emu_buffer
 354
 355     int qscale;                 ///< QP
 356     int lambda;                 ///< lagrange multipler used in rate distortion
 357     int lambda2;                ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
 358     int *lambda_table;
 359     int adaptive_quant;         ///< use adaptive quantization
 360     int dquant;                 ///< qscale difference to prev qscale
 361     int pict_type;              ///< I_TYPE, P_TYPE, B_TYPE, ...
 362     int last_pict_type;
 363     int last_non_b_pict_type;   ///< used for mpeg4 gmc b-frames & ratecontrol
 364     int frame_rate_index;
 365     /* motion compensation */
 366     int unrestricted_mv;        ///< mv can point outside of the coded picture
 367     int h263_long_vectors;      ///< use horrible h263v1 long vector mode
 368     int decode;                 ///< if 0 then decoding will be skiped (for encoding b frames for example)
 369
 370     DSPContext dsp;             ///< pointers for accelerated dsp fucntions
 371     int f_code;                 ///< forward MV resolution
 372     int b_code;                 ///< backward MV resolution for B Frames (mpeg4)
 373     int16_t (*motion_val)[2];
 374     int16_t (*p_mv_table_base)[2];
 375     int16_t (*b_forw_mv_table_base)[2];
 376     int16_t (*b_back_mv_table_base)[2];
 377     int16_t (*b_bidir_forw_mv_table_base)[2];
 378     int16_t (*b_bidir_back_mv_table_base)[2];
 379     int16_t (*b_direct_mv_table_base)[2];
 380     int16_t (*p_mv_table)[2];            ///< MV table (1MV per MB) p-frame encoding
 381     int16_t (*b_forw_mv_table)[2];       ///< MV table (1MV per MB) forward mode b-frame encoding
 382     int16_t (*b_back_mv_table)[2];       ///< MV table (1MV per MB) backward mode b-frame encoding
 383     int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
 384     int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode b-frame encoding
 385     int16_t (*b_direct_mv_table)[2];     ///< MV table (1MV per MB) direct mode b-frame encoding
 386     int me_method;                       ///< ME algorithm
 387     int scene_change_score;
 388     int mv_dir;
 389 #define MV_DIR_BACKWARD  1
 390 #define MV_DIR_FORWARD   2
 391 #define MV_DIRECT        4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4)
 392     int mv_type;
 393 #define MV_TYPE_16X16       0   ///< 1 vector for the whole mb
 394 #define MV_TYPE_8X8         1   ///< 4 vectors (h263, mpeg4 4MV)
 395 #define MV_TYPE_16X8        2   ///< 2 vectors, one per 16x8 block
 396 #define MV_TYPE_FIELD       3   ///< 2 vectors, one per field
 397 #define MV_TYPE_DMV         4   ///< 2 vectors, special mpeg2 Dual Prime Vectors
 398     /**motion vectors for a macroblock
 399        first coordinate : 0 = forward 1 = backward
 400        second "         : depend on type
 401        third  "         : 0 = x, 1 = y
 402     */
 403     int mv[2][4][2];
 404     int field_select[2][2];
 405     int last_mv[2][2][2];             ///< last MV, used for MV prediction in MPEG1 & B-frame MPEG4
 406     uint8_t *fcode_tab;               ///< smallest fcode needed for each MV
 407
 408     MotionEstContext me;
 409
 410     int no_rounding;  /**< apply no rounding to motion compensation (MPEG4, msmpeg4, ...)
 411                         for b-frames rounding mode is allways 0 */
 412
 413     int hurry_up;     /**< when set to 1 during decoding, b frames will be skiped
 414                          when set to 2 idct/dequant will be skipped too */
 415
 416     /* macroblock layer */
 417     int mb_x, mb_y;
 418     int mb_skip_run;
 419     int mb_intra;
 420     uint8_t *mb_type;       ///< Table for MB type FIXME remove and use picture->mb_type
 421 #define MB_TYPE_INTRA    0x01
 422 #define MB_TYPE_INTER    0x02
 423 #define MB_TYPE_INTER4V  0x04
 424 #define MB_TYPE_SKIPED   0x08
 425 //#define MB_TYPE_GMC      0x10
 426
 427 #define MB_TYPE_DIRECT   0x10
 428 #define MB_TYPE_FORWARD  0x20
 429 #define MB_TYPE_BACKWARD 0x40
 430 #define MB_TYPE_BIDIR    0x80
 431
 432     int block_index[6]; ///< index to current MB in block based arrays with edges
 433     int block_wrap[6];
 434     uint8_t *dest[3];
 435
 436     int *mb_index2xy;        ///< mb_index -> mb_x + mb_y*mb_stride
 437
 438     /** matrix transmitted in the bitstream */
 439     uint16_t intra_matrix[64];
 440     uint16_t chroma_intra_matrix[64];
 441     uint16_t inter_matrix[64];
 442     uint16_t chroma_inter_matrix[64];
 443 #define QUANT_BIAS_SHIFT 8
 444     int intra_quant_bias;    ///< bias for the quantizer
 445     int inter_quant_bias;    ///< bias for the quantizer
 446     int min_qcoeff;          ///< minimum encodable coefficient
 447     int max_qcoeff;          ///< maximum encodable coefficient
 448     int ac_esc_length;       ///< num of bits needed to encode the longest esc
 449     uint8_t *intra_ac_vlc_length;
 450     uint8_t *intra_ac_vlc_last_length;
 451     uint8_t *inter_ac_vlc_length;
 452     uint8_t *inter_ac_vlc_last_length;
 453     uint8_t *luma_dc_vlc_length;
 454     uint8_t *chroma_dc_vlc_length;
 455 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
 456
 457     int coded_score[6];
 458
 459     /** precomputed matrix (combine qscale and DCT renorm) */
 460     int __align8 q_intra_matrix[32][64];
 461     int __align8 q_inter_matrix[32][64];
 462     /** identical to the above but for MMX & these are not permutated */
 463     uint16_t __align8 q_intra_matrix16[32][64];
 464     uint16_t __align8 q_inter_matrix16[32][64];
 465     uint16_t __align8 q_intra_matrix16_bias[32][64];
 466     uint16_t __align8 q_inter_matrix16_bias[32][64];
 467     int block_last_index[6];  ///< last non zero coefficient in block
 468     /* scantables */
 469     ScanTable __align8 intra_scantable;
 470     ScanTable intra_h_scantable;
 471     ScanTable intra_v_scantable;
 472     ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce tha cache usage
 473
 474     void *opaque;              ///< private data for the user
 475
 476     /* bit rate control */
 477     int I_frame_bits; //FIXME used in mpeg12 ...
 478     int64_t wanted_bits;
 479     int64_t total_bits;
 480     int frame_bits;                ///< bits used for the current frame
 481     RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
 482
 483     /* statistics, used for 2-pass encoding */
 484     int mv_bits;
 485     int header_bits;
 486     int i_tex_bits;
 487     int p_tex_bits;
 488     int i_count;
 489     int f_count;
 490     int b_count;
 491     int skip_count;
 492     int misc_bits; ///< cbp, mb_type
 493     int last_bits; ///< temp var used for calculating the above vars
 494
 495     /* error concealment / resync */
 496     int error_count;
 497     uint8_t *error_status_table;       ///< table of the error status of each MB
 498 #define VP_START            1          ///< current MB is the first after a resync marker
 499 #define AC_ERROR            2
 500 #define DC_ERROR            4
 501 #define MV_ERROR            8
 502 #define AC_END              16
 503 #define DC_END              32
 504 #define MV_END              64
 505 //FIXME some prefix?
 506
 507     int resync_mb_x;                 ///< x position of last resync marker
 508     int resync_mb_y;                 ///< y position of last resync marker
 509     GetBitContext last_resync_gb;    ///< used to search for the next resync marker
 510     int mb_num_left;                 ///< number of MBs left in this video packet (for partitioned Slices only)
 511     int next_p_frame_damaged;        ///< set if the next p frame is damaged, to avoid showing trashed b frames
 512     int error_resilience;
 513
 514     ParseContext parse_context;
 515
 516     /* H.263 specific */
 517     int gob_number;
 518     int gob_index;
 519
 520     /* H.263+ specific */
 521     int umvplus;                    ///< == H263+ && unrestricted_mv
 522     int h263_aic;                   ///< Advanded INTRA Coding (AIC)
 523     int h263_aic_dir;               ///< AIC direction: 0 = left, 1 = top
 524
 525     /* mpeg4 specific */
 526     int time_increment_resolution;
 527     int time_increment_bits;        ///< number of bits to represent the fractional part of time
 528     int last_time_base;
 529     int time_base;                  ///< time in seconds of last I,P,S Frame
 530     int64_t time;                   ///< time of current frame
 531     int64_t last_non_b_time;
 532     uint16_t pp_time;               ///< time distance between the last 2 p,s,i frames
 533     uint16_t pb_time;               ///< time distance between the last b and p,s,i frame
 534     uint16_t pp_field_time;
 535     uint16_t pb_field_time;         ///< like above, just for interlaced
 536     int shape;
 537     int vol_sprite_usage;
 538     int sprite_width;
 539     int sprite_height;
 540     int sprite_left;
 541     int sprite_top;
 542     int sprite_brightness_change;
 543     int num_sprite_warping_points;
 544     int real_sprite_warping_points;
 545     int sprite_offset[2][2];         ///< sprite offset[isChroma][isMVY]
 546     int sprite_delta[2][2];          ///< sprite_delta [isY][isMVY]
 547     int sprite_shift[2];             ///< sprite shift [isChroma]
 548     int mcsel;
 549     int quant_precision;
 550     int quarter_sample;              ///< 1->qpel, 0->half pel ME/MC
 551     int scalability;
 552     int hierachy_type;
 553     int enhancement_type;
 554     int new_pred;
 555     int reduced_res_vop;
 556     int aspect_ratio_info; //FIXME remove
 557     int aspected_width;    //FIXME remove
 558     int aspected_height;   //FIXME remove
 559     int sprite_warping_accuracy;
 560     int low_latency_sprite;
 561     int data_partitioning;           ///< data partitioning flag from header
 562     int partitioned_frame;           ///< is current frame partitioned
 563     int rvlc;                        ///< reversible vlc
 564     int resync_marker;               ///< could this stream contain resync markers
 565     int low_delay;                   ///< no reordering needed / has no b-frames
 566     int vo_type;
 567     int vol_control_parameters;      ///< does the stream contain the low_delay flag, used to workaround buggy encoders
 568     int intra_dc_threshold;          ///< QP above whch the ac VLC should be used for intra dc
 569     PutBitContext tex_pb;            ///< used for data partitioned VOPs
 570     PutBitContext pb2;               ///< used for data partitioned VOPs
 571 #define PB_BUFFER_SIZE 1024*256
 572     uint8_t *tex_pb_buffer;
 573     uint8_t *pb2_buffer;
 574     int mpeg_quant;
 575     int16_t (*field_mv_table)[2][2];   ///< used for interlaced b frame decoding
 576     int8_t (*field_select_table)[2];   ///< wtf, no really another table for interlaced b frames
 577     int t_frame;                       ///< time distance of first I -> B, used for interlaced b frames
 578     int padding_bug_score;             ///< used to detect the VERY common padding bug in MPEG4
 579
 580     /* divx specific, used to workaround (many) bugs in divx5 */
 581     int divx_version;
 582     int divx_build;
 583     int divx_packed;
 584 #define BITSTREAM_BUFFER_SIZE 1024*256
 585     uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
 586     int bitstream_buffer_size;
 587
 588     int xvid_build;
 589
 590     /* lavc specific stuff, used to workaround bugs in libavcodec */
 591     int ffmpeg_version;
 592     int lavc_build;
 593
 594     /* RV10 specific */
 595     int rv10_version; ///< RV10 version: 0 or 3
 596     int rv10_first_dc_coded[3];
 597
 598     /* MJPEG specific */
 599     struct MJpegContext *mjpeg_ctx;
 600     int mjpeg_vsample[3];       ///< vertical sampling factors, default = {2, 1, 1}
 601     int mjpeg_hsample[3];       ///< horizontal sampling factors, default = {2, 1, 1}
 602     int mjpeg_write_tables;     ///< do we want to have quantisation- and huffmantables in the jpeg file ?
 603     int mjpeg_data_only_frames; ///< frames only with SOI, SOS and EOI markers
 604
 605     /* MSMPEG4 specific */
 606     int mv_table_index;
 607     int rl_table_index;
 608     int rl_chroma_table_index;
 609     int dc_table_index;
 610     int use_skip_mb_code;
 611     int slice_height;      ///< in macroblocks
 612     int first_slice_line;  ///< used in mpeg4 too to handle resync markers
 613     int flipflop_rounding;
 614     int msmpeg4_version;   ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
 615     int per_mb_rl_table;
 616     int esc3_level_length;
 617     int esc3_run_length;
 618     /** [mb_intra][isChroma][level][run][last] */
 619     int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
 620     int inter_intra_pred;
 621     int mspel;
 622
 623     /* decompression specific */
 624     GetBitContext gb;
 625
 626     /* Mpeg1 specific */
 627     int fake_picture_number; ///< picture number at the bitstream frame rate
 628     int gop_picture_number;  ///< index of the first picture of a GOP based on fake_pic_num & mpeg1 specific
 629     int last_mv_dir;         ///< last mv_dir, used for b frame encoding
 630     int broken_link;         ///< no_output_of_prior_pics_flag
 631
 632     /* MPEG2 specific - I wish I had not to support this mess. */
 633     int progressive_sequence;
 634     int mpeg_f_code[2][2];
 635     int picture_structure;
 636 /* picture type */
 637 #define PICT_TOP_FIELD     1
 638 #define PICT_BOTTOM_FIELD  2
 639 #define PICT_FRAME         3
 640
 641     int intra_dc_precision;
 642     int frame_pred_frame_dct;
 643     int top_field_first;
 644     int concealment_motion_vectors;
 645     int q_scale_type;
 646     int intra_vlc_format;
 647     int alternate_scan;
 648     int repeat_first_field;
 649     int chroma_420_type;
 650     int progressive_frame;
 651     int full_pel[2];
 652     int interlaced_dct;
 653     int first_slice;
 654     int first_field;         ///< is 1 for the first field of a field picture 0 otherwise
 655
 656     /* RTP specific */
 657     /* These are explained on avcodec.h */
 658     int rtp_mode;
 659     int rtp_payload_size;
 660     void (*rtp_callback)(void *data, int size, int packet_number);
 661     uint8_t *ptr_lastgob;
 662
 663     DCTELEM (*block)[64]; ///< points to one of the following blocks
 664     DCTELEM blocks[2][6][64] __align8; // for HQ mode we need to keep the best block
 665     int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
 666 #define SLICE_OK         0
 667 #define SLICE_ERROR     -1
 668 #define SLICE_END       -2 ///<end marker found
 669 #define SLICE_NOEND     -3 ///<no end marker or error found but mb count exceeded
 670
 671     void (*dct_unquantize_mpeg1)(struct MpegEncContext *s,
 672                            DCTELEM *block/*align 16*/, int n, int qscale);
 673     void (*dct_unquantize_mpeg2)(struct MpegEncContext *s,
 674                            DCTELEM *block/*align 16*/, int n, int qscale);
 675     void (*dct_unquantize_h263)(struct MpegEncContext *s,
 676                            DCTELEM *block/*align 16*/, int n, int qscale);
 677     void (*dct_unquantize)(struct MpegEncContext *s, // unquantizer to use (mpeg4 can use both)
 678                            DCTELEM *block/*align 16*/, int n, int qscale);
 679     int (*dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
 680     int (*fast_dct_quantize)(struct MpegEncContext *s, DCTELEM *block/*align 16*/, int n, int qscale, int *overflow);
 681 } MpegEncContext;
 682
 683
 684 int DCT_common_init(MpegEncContext *s);
 685 int MPV_common_init(MpegEncContext *s);
 686 void MPV_common_end(MpegEncContext *s);
 687 void MPV_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);
 688 int MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx);
 689 void MPV_frame_end(MpegEncContext *s);
 690 int MPV_encode_init(AVCodecContext *avctx);
 691 int MPV_encode_end(AVCodecContext *avctx);
 692 int MPV_encode_picture(AVCodecContext *avctx, unsigned char *buf, int buf_size, void *data);
 693 #ifdef HAVE_MMX
 694 void MPV_common_init_mmx(MpegEncContext *s);
 695 #endif
 696 #ifdef ARCH_ALPHA
 697 void MPV_common_init_axp(MpegEncContext *s);
 698 #endif
 699 #ifdef HAVE_MLIB
 700 void MPV_common_init_mlib(MpegEncContext *s);
 701 #endif
 702 #ifdef HAVE_MMI
 703 void MPV_common_init_mmi(MpegEncContext *s);
 704 #endif
 705 #ifdef ARCH_ARMV4L
 706 void MPV_common_init_armv4l(MpegEncContext *s);
 707 #endif
 708 #ifdef ARCH_POWERPC
 709 void MPV_common_init_ppc(MpegEncContext *s);
 710 #endif
 711 extern void (*draw_edges)(uint8_t *buf, int wrap, int width, int height, int w);
 712 void ff_copy_bits(PutBitContext *pb, uint8_t *src, int length);
 713 void ff_clean_intra_table_entries(MpegEncContext *s);
 714 void ff_init_scantable(uint8_t *, ScanTable *st, const uint8_t *src_scantable);
 715 void ff_draw_horiz_band(MpegEncContext *s, int y, int h);
 716 void ff_emulated_edge_mc(uint8_t *buf, uint8_t *src, int linesize, int block_w, int block_h,
 717                                     int src_x, int src_y, int w, int h);
 718 #define END_NOT_FOUND -100
 719 int ff_combine_frame( MpegEncContext *s, int next, uint8_t **buf, int *buf_size);
 720 void ff_mpeg_flush(AVCodecContext *avctx);
 721 void ff_print_debug_info(MpegEncContext *s, Picture *pict);
 722 void ff_write_quant_matrix(PutBitContext *pb, int16_t *matrix);
 723
 724 void ff_er_frame_start(MpegEncContext *s);
 725 void ff_er_frame_end(MpegEncContext *s);
 726 void ff_er_add_slice(MpegEncContext *s, int startx, int starty, int endx, int endy, int status);
 727
 728
 729 extern enum PixelFormat ff_yuv420p_list[2];
 730
 731 void ff_init_block_index(MpegEncContext *s);
 732
 733 static inline void ff_update_block_index(MpegEncContext *s){
 734     s->block_index[0]+=2;
 735     s->block_index[1]+=2;
 736     s->block_index[2]+=2;
 737     s->block_index[3]+=2;
 738     s->block_index[4]++;
 739     s->block_index[5]++;
 740     s->dest[0]+= 16;
 741     s->dest[1]+= 8;
 742     s->dest[2]+= 8;
 743 }
 744
 745 static inline int get_bits_diff(MpegEncContext *s){
 746     const int bits= get_bit_count(&s->pb);
 747     const int last= s->last_bits;
 748
 749     s->last_bits = bits;
 750
 751     return bits - last;
 752 }
 753
 754 /* motion_est.c */
 755 void ff_estimate_p_frame_motion(MpegEncContext * s,
 756                              int mb_x, int mb_y);
 757 void ff_estimate_b_frame_motion(MpegEncContext * s,
 758                              int mb_x, int mb_y);
 759 int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
 760 void ff_fix_long_p_mvs(MpegEncContext * s);
 761 void ff_fix_long_b_mvs(MpegEncContext * s, int16_t (*mv_table)[2], int f_code, int type);
 762 void ff_init_me(MpegEncContext *s);
 763 int ff_pre_estimate_p_frame_motion(MpegEncContext * s, int mb_x, int mb_y);
 764
 765
 766 /* mpeg12.c */
 767 extern const int16_t ff_mpeg1_default_intra_matrix[64];
 768 extern const int16_t ff_mpeg1_default_non_intra_matrix[64];
 769 extern uint8_t ff_mpeg1_dc_scale_table[128];
 770
 771 void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number);
 772 void mpeg1_encode_mb(MpegEncContext *s,
 773                      DCTELEM block[6][64],
 774                      int motion_x, int motion_y);
 775 void ff_mpeg1_encode_init(MpegEncContext *s);
 776 void ff_mpeg1_encode_slice_header(MpegEncContext *s);
 777 void ff_mpeg1_clean_buffers(MpegEncContext *s);
 778
 779
 780 /** RLTable. */
 781 typedef struct RLTable {
 782     int n;                         ///< number of entries of table_vlc minus 1
 783     int last;                      ///< number of values for last = 0
 784     const uint16_t (*table_vlc)[2];
 785     const int8_t *table_run;
 786     const int8_t *table_level;
 787     uint8_t *index_run[2];         ///< encoding only
 788     int8_t *max_level[2];          ///< encoding & decoding
 789     int8_t *max_run[2];            ///< encoding & decoding
 790     VLC vlc;                       ///< decoding only deprected FIXME remove
 791     RL_VLC_ELEM *rl_vlc[32];       ///< decoding only
 792 } RLTable;
 793
 794 void init_rl(RLTable *rl);
 795 void init_vlc_rl(RLTable *rl);
 796
 797 static inline int get_rl_index(const RLTable *rl, int last, int run, int level)
 798 {
 799     int index;
 800     index = rl->index_run[last][run];
 801     if (index >= rl->n)
 802         return rl->n;
 803     if (level > rl->max_level[last][run])
 804         return rl->n;
 805     return index + level - 1;
 806 }
 807
 808 extern uint8_t ff_mpeg4_y_dc_scale_table[32];
 809 extern uint8_t ff_mpeg4_c_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 int ff_h263_decode_init(AVCodecContext *avctx);
 813 int ff_h263_decode_frame(AVCodecContext *avctx,
 814                              void *data, int *data_size,
 815                              uint8_t *buf, int buf_size);
 816 int ff_h263_decode_end(AVCodecContext *avctx);
 817 void h263_encode_mb(MpegEncContext *s,
 818                     DCTELEM block[6][64],
 819                     int motion_x, int motion_y);
 820 void mpeg4_encode_mb(MpegEncContext *s,
 821                     DCTELEM block[6][64],
 822                     int motion_x, int motion_y);
 823 void h263_encode_picture_header(MpegEncContext *s, int picture_number);
 824 void ff_flv_encode_picture_header(MpegEncContext *s, int picture_number);
 825 int h263_encode_gob_header(MpegEncContext * s, int mb_line);
 826 int16_t *h263_pred_motion(MpegEncContext * s, int block,
 827                         int *px, int *py);
 828 void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
 829                    int dir);
 830 void ff_set_mpeg4_time(MpegEncContext * s, int picture_number);
 831 void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
 832 void h263_encode_init(MpegEncContext *s);
 833 void h263_decode_init_vlc(MpegEncContext *s);
 834 int h263_decode_picture_header(MpegEncContext *s);
 835 int ff_h263_decode_gob_header(MpegEncContext *s);
 836 int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
 837 void ff_h263_update_motion_val(MpegEncContext * s);
 838
 839
 840 int intel_h263_decode_picture_header(MpegEncContext *s);
 841 int flv_h263_decode_picture_header(MpegEncContext *s);
 842 int ff_h263_decode_mb(MpegEncContext *s,
 843                       DCTELEM block[6][64]);
 844 int h263_get_picture_format(int width, int height);
 845 void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
 846 void ff_mpeg4_clean_buffers(MpegEncContext *s);
 847 void ff_mpeg4_stuffing(PutBitContext * pbc);
 848 void ff_mpeg4_init_partitions(MpegEncContext *s);
 849 void ff_mpeg4_merge_partitions(MpegEncContext *s);
 850 void ff_clean_mpeg4_qscales(MpegEncContext *s);
 851 void ff_clean_h263_qscales(MpegEncContext *s);
 852 int ff_mpeg4_decode_partitions(MpegEncContext *s);
 853 int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
 854 int ff_h263_resync(MpegEncContext *s);
 855 int ff_h263_get_gob_height(MpegEncContext *s);
 856 int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
 857 inline int ff_h263_round_chroma(int x);
 858
 859
 860 /* rv10.c */
 861 void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
 862 int rv_decode_dc(MpegEncContext *s, int n);
 863
 864
 865 /* msmpeg4.c */
 866 void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
 867 void msmpeg4_encode_ext_header(MpegEncContext * s);
 868 void msmpeg4_encode_mb(MpegEncContext * s,
 869                        DCTELEM block[6][64],
 870                        int motion_x, int motion_y);
 871 int msmpeg4_decode_picture_header(MpegEncContext * s);
 872 int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
 873 int ff_msmpeg4_decode_init(MpegEncContext *s);
 874 void ff_msmpeg4_encode_init(MpegEncContext *s);
 875 int ff_wmv2_decode_picture_header(MpegEncContext * s);
 876 int ff_wmv2_decode_secondary_picture_header(MpegEncContext * s);
 877 void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM block[6][64], uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr);
 878 void ff_mspel_motion(MpegEncContext *s,
 879                                uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
 880                                uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
 881                                int motion_x, int motion_y, int h);
 882 int ff_wmv2_encode_picture_header(MpegEncContext * s, int picture_number);
 883 void ff_wmv2_encode_mb(MpegEncContext * s,
 884                        DCTELEM block[6][64],
 885                        int motion_x, int motion_y);
 886
 887 /* mjpeg.c */
 888 int mjpeg_init(MpegEncContext *s);
 889 void mjpeg_close(MpegEncContext *s);
 890 void mjpeg_encode_mb(MpegEncContext *s,
 891                      DCTELEM block[6][64]);
 892 void mjpeg_picture_header(MpegEncContext *s);
 893 void mjpeg_picture_trailer(MpegEncContext *s);
 894
 895
 896 /* rate control */
 897 int ff_rate_control_init(MpegEncContext *s);
 898 float ff_rate_estimate_qscale(MpegEncContext *s);
 899 void ff_write_pass1_stats(MpegEncContext *s);
 900 void ff_rate_control_uninit(MpegEncContext *s);
 901 double ff_eval(char *s, double *const_value, const char **const_name,
 902                double (**func1)(void *, double), const char **func1_name,
 903                double (**func2)(void *, double, double), char **func2_name,
 904                void *opaque);
 905
 906
 907 #endif /* AVCODEC_MPEGVIDEO_H */