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 Libav.
   7  *
   8  * Libav 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  * Libav 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 Libav; 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
  25  * mpegvideo header.
  26  */
  27
  28 #ifndef AVCODEC_MPEGVIDEO_H
  29 #define AVCODEC_MPEGVIDEO_H
  30
  31 #include <float.h>
  32
  33 #include "avcodec.h"
  34 #include "bitstream.h"
  35 #include "blockdsp.h"
  36 #include "error_resilience.h"
  37 #include "fdctdsp.h"
  38 #include "get_bits.h"
  39 #include "h263dsp.h"
  40 #include "hpeldsp.h"
  41 #include "idctdsp.h"
  42 #include "internal.h"
  43 #include "me_cmp.h"
  44 #include "motion_est.h"
  45 #include "mpegpicture.h"
  46 #include "mpegvideodsp.h"
  47 #include "mpegvideoencdsp.h"
  48 #include "pixblockdsp.h"
  49 #include "put_bits.h"
  50 #include "ratecontrol.h"
  51 #include "parser.h"
  52 #include "mpegutils.h"
  53 #include "mpeg12data.h"
  54 #include "qpeldsp.h"
  55 #include "thread.h"
  56 #include "videodsp.h"
  57
  58 #include "libavutil/opt.h"
  59
  60 #define MAX_THREADS 16
  61
  62 #define MAX_B_FRAMES 16
  63
  64 /* Start codes. */
  65 #define SEQ_END_CODE            0x000001b7
  66 #define SEQ_START_CODE          0x000001b3
  67 #define GOP_START_CODE          0x000001b8
  68 #define PICTURE_START_CODE      0x00000100
  69 #define SLICE_MIN_START_CODE    0x00000101
  70 #define SLICE_MAX_START_CODE    0x000001af
  71 #define EXT_START_CODE          0x000001b5
  72 #define USER_START_CODE         0x000001b2
  73
  74 /**
  75  * MpegEncContext.
  76  */
  77 typedef struct MpegEncContext {
  78     AVClass *class;
  79
  80     int y_dc_scale, c_dc_scale;
  81     int ac_pred;
  82     int block_last_index[12];  ///< last non zero coefficient in block
  83     int h263_aic;              ///< Advanced INTRA Coding (AIC)
  84
  85     /* scantables */
  86     ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce the cache usage
  87     ScanTable intra_scantable;
  88     ScanTable intra_h_scantable;
  89     ScanTable intra_v_scantable;
  90
  91     /* WARNING: changes above this line require updates to hardcoded
  92      *          offsets used in ASM. */
  93
  94     struct AVCodecContext *avctx;
  95     /* the following parameters must be initialized before encoding */
  96     int width, height;///< picture size. must be a multiple of 16
  97     int gop_size;
  98     int intra_only;   ///< if true, only intra pictures are generated
  99     int bit_rate;     ///< wanted bit rate
 100     enum OutputFormat out_format; ///< output format
 101     int h263_pred;    ///< use MPEG-4/H.263 ac/dc predictions
 102     int pb_frame;     ///< PB-frame mode (0 = none, 1 = base, 2 = improved)
 103
 104 /* the following codec id fields are deprecated in favor of codec_id */
 105     int h263_plus;    ///< H.263+ headers
 106     int h263_flv;     ///< use flv H.263 header
 107
 108     enum AVCodecID codec_id;     /* see AV_CODEC_ID_xxx */
 109     int fixed_qscale; ///< fixed qscale if non zero
 110     int encoding;     ///< true if we are encoding (vs decoding)
 111     int max_b_frames; ///< max number of B-frames for encoding
 112     int luma_elim_threshold;
 113     int chroma_elim_threshold;
 114     int strict_std_compliance; ///< strictly follow the std (MPEG-4, ...)
 115     int workaround_bugs;       ///< workaround bugs in encoders which cannot be detected automatically
 116     int codec_tag;             ///< internal codec_tag upper case converted from avctx codec_tag
 117     /* the following fields are managed internally by the encoder */
 118
 119     /* sequence parameters */
 120     int context_initialized;
 121     int input_picture_number;  ///< used to set pic->display_picture_number, should not be used for/by anything else
 122     int coded_picture_number;  ///< used to set pic->coded_picture_number, should not be used for/by anything else
 123     int picture_number;       //FIXME remove, unclear definition
 124     int picture_in_gop_number; ///< 0-> first pic in gop, ...
 125     int mb_width, mb_height;   ///< number of MBs horizontally & vertically
 126     int mb_stride;             ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11
 127     int b8_stride;             ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
 128     int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)
 129     int mb_num;                ///< number of MBs of a picture
 130     ptrdiff_t linesize;        ///< line size, in bytes, may be different from width
 131     ptrdiff_t uvlinesize;      ///< line size, for chroma in bytes, may be different from width
 132     Picture *picture;          ///< main picture buffer
 133     Picture **input_picture;   ///< next pictures on display order for encoding
 134     Picture **reordered_input_picture; ///< pointer to the next pictures in coded order for encoding
 135
 136     int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_encode_video2()
 137     /**
 138      * pts difference between the first and second input frame, used for
 139      * calculating dts of the first frame when there's a delay */
 140     int64_t dts_delta;
 141     /**
 142      * reordered pts to be used as dts for the next output frame when there's
 143      * a delay */
 144     int64_t reordered_pts;
 145
 146     /** bit output */
 147     PutBitContext pb;
 148
 149     int start_mb_y;            ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
 150     int end_mb_y;              ///< end   mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)
 151     struct MpegEncContext *thread_context[MAX_THREADS];
 152     int slice_context_count;   ///< number of used thread_contexts
 153
 154     /**
 155      * copy of the previous picture structure.
 156      * note, linesize & data, might not match the previous picture (for field pictures)
 157      */
 158     Picture last_picture;
 159
 160     /**
 161      * copy of the next picture structure.
 162      * note, linesize & data, might not match the next picture (for field pictures)
 163      */
 164     Picture next_picture;
 165
 166     /**
 167      * copy of the source picture structure for encoding.
 168      * note, linesize & data, might not match the source picture (for field pictures)
 169      */
 170     Picture new_picture;
 171
 172     /**
 173      * copy of the current picture structure.
 174      * note, linesize & data, might not match the current picture (for field pictures)
 175      */
 176     Picture current_picture;    ///< buffer to store the decompressed current picture
 177
 178     Picture *last_picture_ptr;     ///< pointer to the previous picture.
 179     Picture *next_picture_ptr;     ///< pointer to the next picture (for bidir pred)
 180     Picture *current_picture_ptr;  ///< pointer to the current picture
 181     int last_dc[3];                ///< last DC values for MPEG-1
 182     int16_t *dc_val_base;
 183     int16_t *dc_val[3];            ///< used for MPEG-4 DC prediction, all 3 arrays must be continuous
 184     const uint8_t *y_dc_scale_table;     ///< qscale -> y_dc_scale table
 185     const uint8_t *c_dc_scale_table;     ///< qscale -> c_dc_scale table
 186     const uint8_t *chroma_qscale_table;  ///< qscale -> chroma_qscale (H.263)
 187     uint8_t *coded_block_base;
 188     uint8_t *coded_block;          ///< used for coded block pattern prediction (msmpeg4v3, wmv1)
 189     int16_t (*ac_val_base)[16];
 190     int16_t (*ac_val[3])[16];      ///< used for for MPEG-4 AC prediction, all 3 arrays must be continuous
 191     int mb_skipped;                ///< MUST BE SET only during DECODING
 192     uint8_t *mbskip_table;        /**< used to avoid copy if macroblock skipped (for black regions for example)
 193                                    and used for B-frame encoding & decoding (contains skip table of next P-frame) */
 194     uint8_t *mbintra_table;       ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
 195     uint8_t *cbp_table;           ///< used to store cbp, ac_pred for partitioned decoding
 196     uint8_t *pred_dir_table;      ///< used to store pred_dir for partitioned decoding
 197
 198     ScratchpadContext sc;
 199
 200     int qscale;                 ///< QP
 201     int chroma_qscale;          ///< chroma QP
 202     unsigned int lambda;        ///< Lagrange multiplier used in rate distortion
 203     unsigned int lambda2;       ///< (lambda*lambda) >> FF_LAMBDA_SHIFT
 204     int *lambda_table;
 205     int adaptive_quant;         ///< use adaptive quantization
 206     int dquant;                 ///< qscale difference to prev qscale
 207     int pict_type;              ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
 208     int last_pict_type; //FIXME removes
 209     int last_non_b_pict_type;   ///< used for MPEG-4 gmc B-frames & ratecontrol
 210     int droppable;
 211     int frame_rate_index;
 212     int last_lambda_for[5];     ///< last lambda for a specific pict type
 213     int skipdct;                ///< skip dct and code zero residual
 214
 215     /* motion compensation */
 216     int unrestricted_mv;        ///< mv can point outside of the coded picture
 217     int h263_long_vectors;      ///< use horrible H.263v1 long vector mode
 218
 219     BlockDSPContext bdsp;
 220     FDCTDSPContext fdsp;
 221     HpelDSPContext hdsp;
 222     IDCTDSPContext idsp;
 223     MECmpContext mecc;
 224     MpegVideoDSPContext mdsp;
 225     MpegvideoEncDSPContext mpvencdsp;
 226     PixblockDSPContext pdsp;
 227     QpelDSPContext qdsp;
 228     VideoDSPContext vdsp;
 229     H263DSPContext h263dsp;
 230     int f_code;                 ///< forward MV resolution
 231     int b_code;                 ///< backward MV resolution for B-frames (MPEG-4)
 232     int16_t (*p_mv_table_base)[2];
 233     int16_t (*b_forw_mv_table_base)[2];
 234     int16_t (*b_back_mv_table_base)[2];
 235     int16_t (*b_bidir_forw_mv_table_base)[2];
 236     int16_t (*b_bidir_back_mv_table_base)[2];
 237     int16_t (*b_direct_mv_table_base)[2];
 238     int16_t (*p_field_mv_table_base[2][2])[2];
 239     int16_t (*b_field_mv_table_base[2][2][2])[2];
 240     int16_t (*p_mv_table)[2];            ///< MV table (1MV per MB) P-frame encoding
 241     int16_t (*b_forw_mv_table)[2];       ///< MV table (1MV per MB) forward mode B-frame encoding
 242     int16_t (*b_back_mv_table)[2];       ///< MV table (1MV per MB) backward mode B-frame encoding
 243     int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode B-frame encoding
 244     int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode B-frame encoding
 245     int16_t (*b_direct_mv_table)[2];     ///< MV table (1MV per MB) direct mode B-frame encoding
 246     int16_t (*p_field_mv_table[2][2])[2];   ///< MV table (2MV per MB) interlaced P-frame encoding
 247     int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced B-frame encoding
 248     uint8_t (*p_field_select_table[2]);
 249     uint8_t (*b_field_select_table[2][2]);
 250     int motion_est;                      ///< ME algorithm
 251     int me_penalty_compensation;
 252     int me_pre;                          ///< prepass for motion estimation
 253     int mv_dir;
 254 #define MV_DIR_FORWARD   1
 255 #define MV_DIR_BACKWARD  2
 256 #define MV_DIRECT        4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (MPEG-4)
 257     int mv_type;
 258 #define MV_TYPE_16X16       0   ///< 1 vector for the whole mb
 259 #define MV_TYPE_8X8         1   ///< 4 vectors (H.263, MPEG-4 4MV)
 260 #define MV_TYPE_16X8        2   ///< 2 vectors, one per 16x8 block
 261 #define MV_TYPE_FIELD       3   ///< 2 vectors, one per field
 262 #define MV_TYPE_DMV         4   ///< 2 vectors, special mpeg2 Dual Prime Vectors
 263     /**motion vectors for a macroblock
 264        first coordinate : 0 = forward 1 = backward
 265        second "         : depend on type
 266        third  "         : 0 = x, 1 = y
 267     */
 268     int mv[2][4][2];
 269     int field_select[2][2];
 270     int last_mv[2][2][2];             ///< last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4
 271     uint8_t *fcode_tab;               ///< smallest fcode needed for each MV
 272     int16_t direct_scale_mv[2][64];   ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv
 273
 274     MotionEstContext me;
 275
 276     int no_rounding;  /**< apply no rounding to motion compensation (MPEG-4, msmpeg4, ...)
 277                         for B-frames rounding mode is always 0 */
 278
 279     /* macroblock layer */
 280     int mb_x, mb_y;
 281     int mb_skip_run;
 282     int mb_intra;
 283     uint16_t *mb_type;  ///< Table for candidate MB types for encoding (defines in mpegutils.h)
 284
 285     int block_index[6]; ///< index to current MB in block based arrays with edges
 286     int block_wrap[6];
 287     uint8_t *dest[3];
 288
 289     int *mb_index2xy;        ///< mb_index -> mb_x + mb_y*mb_stride
 290
 291     /** matrix transmitted in the bitstream */
 292     uint16_t intra_matrix[64];
 293     uint16_t chroma_intra_matrix[64];
 294     uint16_t inter_matrix[64];
 295     uint16_t chroma_inter_matrix[64];
 296
 297     int intra_quant_bias;    ///< bias for the quantizer
 298     int inter_quant_bias;    ///< bias for the quantizer
 299     int min_qcoeff;          ///< minimum encodable coefficient
 300     int max_qcoeff;          ///< maximum encodable coefficient
 301     int ac_esc_length;       ///< num of bits needed to encode the longest esc
 302     uint8_t *intra_ac_vlc_length;
 303     uint8_t *intra_ac_vlc_last_length;
 304     uint8_t *inter_ac_vlc_length;
 305     uint8_t *inter_ac_vlc_last_length;
 306     uint8_t *luma_dc_vlc_length;
 307 #define UNI_AC_ENC_INDEX(run,level) ((run)*128 + (level))
 308
 309     int coded_score[8];
 310
 311     /** precomputed matrix (combine qscale and DCT renorm) */
 312     int (*q_intra_matrix)[64];
 313     int (*q_inter_matrix)[64];
 314     /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/
 315     uint16_t (*q_intra_matrix16)[2][64];
 316     uint16_t (*q_inter_matrix16)[2][64];
 317
 318     /* noise reduction */
 319     int (*dct_error_sum)[64];
 320     int dct_count[2];
 321     uint16_t (*dct_offset)[64];
 322
 323     /* bit rate control */
 324     int64_t total_bits;
 325     int frame_bits;                ///< bits used for the current frame
 326     int next_lambda;               ///< next lambda used for retrying to encode a frame
 327     RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c
 328
 329     /* statistics, used for 2-pass encoding */
 330     int mv_bits;
 331     int header_bits;
 332     int i_tex_bits;
 333     int p_tex_bits;
 334     int i_count;
 335     int f_count;
 336     int b_count;
 337     int skip_count;
 338     int misc_bits; ///< cbp, mb_type
 339     int last_bits; ///< temp var used for calculating the above vars
 340
 341     /* error concealment / resync */
 342     int resync_mb_x;                 ///< x position of last resync marker
 343     int resync_mb_y;                 ///< y position of last resync marker
 344     GetBitContext last_resync_gb;    ///< used to search for the next resync marker
 345     BitstreamContext last_resync_bc; ///< used to search for the next resync marker
 346     int mb_num_left;                 ///< number of MBs left in this video packet (for partitioned Slices only)
 347     int next_p_frame_damaged;        ///< set if the next p frame is damaged, to avoid showing trashed B-frames
 348
 349     ParseContext parse_context;
 350
 351     /* H.263 specific */
 352     int gob_index;
 353     int obmc;                       ///< overlapped block motion compensation
 354     int mb_info;                    ///< interval for outputting info about mb offsets as side data
 355     int prev_mb_info, last_mb_info;
 356     uint8_t *mb_info_ptr;
 357     int mb_info_size;
 358
 359     /* H.263+ specific */
 360     int umvplus;                    ///< == H.263+ && unrestricted_mv
 361     int h263_aic_dir;               ///< AIC direction: 0 = left, 1 = top
 362     int h263_slice_structured;
 363     int alt_inter_vlc;              ///< alternative inter vlc
 364     int modified_quant;
 365     int loop_filter;
 366     int custom_pcf;
 367
 368     /* MPEG-4 specific */
 369     ///< number of bits to represent the fractional part of time (encoder only)
 370     int time_increment_bits;
 371     int last_time_base;
 372     int time_base;                  ///< time in seconds of last I,P,S Frame
 373     int64_t time;                   ///< time of current frame
 374     int64_t last_non_b_time;
 375     uint16_t pp_time;               ///< time distance between the last 2 p,s,i frames
 376     uint16_t pb_time;               ///< time distance between the last b and p,s,i frame
 377     uint16_t pp_field_time;
 378     uint16_t pb_field_time;         ///< like above, just for interlaced
 379     int real_sprite_warping_points;
 380     int sprite_offset[2][2];         ///< sprite offset[isChroma][isMVY]
 381     int sprite_delta[2][2];          ///< sprite_delta [isY][isMVY]
 382     int mcsel;
 383     int quant_precision;
 384     int quarter_sample;              ///< 1->qpel, 0->half pel ME/MC
 385     int aspect_ratio_info; //FIXME remove
 386     int sprite_warping_accuracy;
 387     int data_partitioning;           ///< data partitioning flag from header
 388     int partitioned_frame;           ///< is current frame partitioned
 389     int low_delay;                   ///< no reordering needed / has no B-frames
 390     int vo_type;
 391     PutBitContext tex_pb;            ///< used for data partitioned VOPs
 392     PutBitContext pb2;               ///< used for data partitioned VOPs
 393     int mpeg_quant;
 394     int padding_bug_score;             ///< used to detect the VERY common padding bug in MPEG-4
 395
 396     /* divx specific, used to workaround (many) bugs in divx5 */
 397     int divx_packed;
 398     uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
 399     int bitstream_buffer_size;
 400     unsigned int allocated_bitstream_buffer_size;
 401
 402     /* RV10 specific */
 403     int rv10_version; ///< RV10 version: 0 or 3
 404     int rv10_first_dc_coded[3];
 405
 406     /* MJPEG specific */
 407     struct MJpegContext *mjpeg_ctx;
 408     int pred;
 409
 410     /* MSMPEG4 specific */
 411     int mv_table_index;
 412     int rl_table_index;
 413     int rl_chroma_table_index;
 414     int dc_table_index;
 415     int use_skip_mb_code;
 416     int slice_height;      ///< in macroblocks
 417     int first_slice_line;  ///< used in MPEG-4 too to handle resync markers
 418     int flipflop_rounding;
 419     int msmpeg4_version;   ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8
 420     int per_mb_rl_table;
 421     int esc3_level_length;
 422     int esc3_run_length;
 423     /** [mb_intra][isChroma][level][run][last] */
 424     int (*ac_stats)[2][MAX_LEVEL+1][MAX_RUN+1][2];
 425     int inter_intra_pred;
 426     int mspel;
 427
 428     /* decompression specific */
 429     GetBitContext gb;
 430     BitstreamContext bc;
 431
 432     /* MPEG-1 specific */
 433     int gop_picture_number;  ///< index of the first picture of a GOP based on fake_pic_num & MPEG-1 specific
 434     int last_mv_dir;         ///< last mv_dir, used for B-frame encoding
 435     uint8_t *vbv_delay_ptr;  ///< pointer to vbv_delay in the bitstream
 436
 437     /* MPEG-2-specific - I wished not to have to support this mess. */
 438     int progressive_sequence;
 439     int mpeg_f_code[2][2];
 440
 441     // picture structure defines are loaded from mpegutils.h
 442     int picture_structure;
 443
 444     int64_t timecode_frame_start; ///< GOP timecode frame start number, in non drop frame format
 445     int intra_dc_precision;
 446     int frame_pred_frame_dct;
 447     int top_field_first;
 448     int concealment_motion_vectors;
 449     int q_scale_type;
 450     int brd_scale;
 451     int intra_vlc_format;
 452     int alternate_scan;
 453     int repeat_first_field;
 454     int chroma_420_type;
 455     int chroma_format;
 456 #define CHROMA_420 1
 457 #define CHROMA_422 2
 458     int chroma_x_shift;//depend on pix_format, that depend on chroma_format
 459     int chroma_y_shift;
 460
 461     int progressive_frame;
 462     int full_pel[2];
 463     int interlaced_dct;
 464     int first_field;         ///< is 1 for the first field of a field picture 0 otherwise
 465     int drop_frame_timecode; ///< timecode is in drop frame format.
 466     int scan_offset;         ///< reserve space for SVCD scan offset user data.
 467
 468     /* RTP specific */
 469     int rtp_mode;
 470     int rtp_payload_size;
 471
 472     uint8_t *ptr_lastgob;
 473     int16_t (*pblocks[12])[64];
 474
 475     int16_t (*block)[64]; ///< points to one of the following blocks
 476     int16_t (*blocks)[12][64]; // for HQ mode we need to keep the best block
 477     int (*decode_mb)(struct MpegEncContext *s, int16_t block[6][64]); // used by some codecs to avoid a switch()
 478 #define SLICE_OK         0
 479 #define SLICE_ERROR     -1
 480 #define SLICE_END       -2 ///<end marker found
 481 #define SLICE_NOEND     -3 ///<no end marker or error found but mb count exceeded
 482
 483     void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,
 484                            int16_t *block/*align 16*/, int n, int qscale);
 485     void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,
 486                            int16_t *block/*align 16*/, int n, int qscale);
 487     void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,
 488                            int16_t *block/*align 16*/, int n, int qscale);
 489     void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,
 490                            int16_t *block/*align 16*/, int n, int qscale);
 491     void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,
 492                            int16_t *block/*align 16*/, int n, int qscale);
 493     void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,
 494                            int16_t *block/*align 16*/, int n, int qscale);
 495     void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both)
 496                            int16_t *block/*align 16*/, int n, int qscale);
 497     void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both)
 498                            int16_t *block/*align 16*/, int n, int qscale);
 499     int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
 500     int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);
 501     void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);
 502
 503     int mpv_flags;      ///< flags set by private options
 504     int quantizer_noise_shaping;
 505
 506     /**
 507      * ratecontrol qmin qmax limiting method
 508      * 0-> clipping, 1-> use a nice continuous function to limit qscale within qmin/qmax.
 509      */
 510     float rc_qsquish;
 511     float rc_qmod_amp;
 512     int   rc_qmod_freq;
 513     float rc_initial_cplx;
 514     float rc_buffer_aggressivity;
 515     float border_masking;
 516     int lmin, lmax;
 517
 518     char *rc_eq;
 519
 520     /* temp buffers for rate control */
 521     float *cplx_tab, *bits_tab;
 522
 523     /* flag to indicate a reinitialization is required, e.g. after
 524      * a frame size change */
 525     int context_reinit;
 526
 527     ERContext er;
 528
 529     int error_rate;
 530
 531     /* temporary frames used by b_frame_strategy = 2 */
 532     AVFrame *tmp_frames[MAX_B_FRAMES + 2];
 533     int b_frame_strategy;
 534     int b_sensitivity;
 535
 536     /* frame skip options for encoding */
 537     int frame_skip_threshold;
 538     int frame_skip_factor;
 539     int frame_skip_exp;
 540     int frame_skip_cmp;
 541
 542     int scenechange_threshold;
 543     int noise_reduction;
 544 } MpegEncContext;
 545
 546 /* mpegvideo_enc common options */
 547 #define FF_MPV_FLAG_SKIP_RD      0x0001
 548 #define FF_MPV_FLAG_STRICT_GOP   0x0002
 549 #define FF_MPV_FLAG_QP_RD        0x0004
 550 #define FF_MPV_FLAG_CBP_RD       0x0008
 551 #define FF_MPV_FLAG_NAQ          0x0010
 552 #define FF_MPV_FLAG_MV0          0x0020
 553
 554 #define FF_MPV_OPT_CMP_FUNC \
 555 { "sad",    "Sum of absolute differences, fast", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_SAD }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \
 556 { "sse",    "Sum of squared errors", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_SSE }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \
 557 { "satd",   "Sum of absolute Hadamard transformed differences", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_SATD }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \
 558 { "dct",    "Sum of absolute DCT transformed differences", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_DCT }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \
 559 { "psnr",   "Sum of squared quantization errors, low quality", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_PSNR }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \
 560 { "bit",    "Number of bits needed for the block", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_BIT }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \
 561 { "rd",     "Rate distortion optimal, slow", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_RD }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \
 562 { "zero",   "Zero", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_ZERO }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \
 563 { "vsad",   "Sum of absolute vertical differences", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_VSAD }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \
 564 { "vsse",   "Sum of squared vertical differences", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_VSSE }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \
 565 { "nsse",   "Noise preserving sum of squared differences", 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_NSSE }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \
 566 { "dct264", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_DCT264 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \
 567 { "dctmax", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_DCTMAX }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \
 568 { "chroma", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = FF_CMP_CHROMA }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }
 569
 570 #define FF_MPV_OFFSET(x) offsetof(MpegEncContext, x)
 571 #define FF_MPV_OPT_FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM)
 572 #define FF_MPV_COMMON_OPTS \
 573 FF_MPV_OPT_CMP_FUNC, \
 574 { "mpv_flags",      "Flags common for all mpegvideo-based encoders.", FF_MPV_OFFSET(mpv_flags), AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "mpv_flags" },\
 575 { "skip_rd",        "RD optimal MB level residual skipping", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_SKIP_RD },    0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
 576 { "strict_gop",     "Strictly enforce gop size",             0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_STRICT_GOP }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
 577 { "qp_rd",          "Use rate distortion optimization for qp selection", 0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_QP_RD },  0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
 578 { "cbp_rd",         "use rate distortion optimization for CBP",          0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_CBP_RD }, 0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
 579 { "naq",            "normalize adaptive quantization",                   0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_NAQ },    0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
 580 { "mv0",            "always try a mb with mv=<0,0>",                     0, AV_OPT_TYPE_CONST, { .i64 = FF_MPV_FLAG_MV0 },    0, 0, FF_MPV_OPT_FLAGS, "mpv_flags" },\
 581 { "luma_elim_threshold",   "single coefficient elimination threshold for luminance (negative values also consider dc coefficient)",\
 582                                                                       FF_MPV_OFFSET(luma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
 583 { "chroma_elim_threshold", "single coefficient elimination threshold for chrominance (negative values also consider dc coefficient)",\
 584                                                                       FF_MPV_OFFSET(chroma_elim_threshold), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },\
 585 { "quantizer_noise_shaping", NULL,                                  FF_MPV_OFFSET(quantizer_noise_shaping), AV_OPT_TYPE_INT, { .i64 = 0 },       0, INT_MAX, FF_MPV_OPT_FLAGS },\
 586 { "error_rate", "Simulate errors in the bitstream to test error concealment.",                                                                                                  \
 587                                                                     FF_MPV_OFFSET(error_rate),              AV_OPT_TYPE_INT, { .i64 = 0 },       0, INT_MAX, FF_MPV_OPT_FLAGS },\
 588 {"qsquish", "how to keep quantizer between qmin and qmax (0 = clip, 1 = use differentiable function)",                                                                          \
 589                                                                     FF_MPV_OFFSET(rc_qsquish), AV_OPT_TYPE_FLOAT, {.dbl = 0 }, 0, 99, FF_MPV_OPT_FLAGS},                        \
 590 {"rc_qmod_amp", "experimental quantizer modulation",                FF_MPV_OFFSET(rc_qmod_amp), AV_OPT_TYPE_FLOAT, {.dbl = 0 }, -FLT_MAX, FLT_MAX, FF_MPV_OPT_FLAGS},           \
 591 {"rc_qmod_freq", "experimental quantizer modulation",               FF_MPV_OFFSET(rc_qmod_freq), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS},             \
 592 {"rc_eq", "Set rate control equation. When computing the expression, besides the standard functions "                                                                           \
 593           "defined in the section 'Expression Evaluation', the following functions are available: "                                                                             \
 594           "bits2qp(bits), qp2bits(qp). Also the following constants are available: iTex pTex tex mv "                                                                           \
 595           "fCode iCount mcVar var isI isP isB avgQP qComp avgIITex avgPITex avgPPTex avgBPTex avgTex.",                                                                         \
 596                                                                     FF_MPV_OFFSET(rc_eq), AV_OPT_TYPE_STRING,                           .flags = FF_MPV_OPT_FLAGS },            \
 597 {"rc_init_cplx", "initial complexity for 1-pass encoding",          FF_MPV_OFFSET(rc_initial_cplx), AV_OPT_TYPE_FLOAT, {.dbl = 0 }, -FLT_MAX, FLT_MAX, FF_MPV_OPT_FLAGS},       \
 598 {"rc_buf_aggressivity", "currently useless",                        FF_MPV_OFFSET(rc_buffer_aggressivity), AV_OPT_TYPE_FLOAT, {.dbl = 1.0 }, -FLT_MAX, FLT_MAX, FF_MPV_OPT_FLAGS}, \
 599 {"border_mask", "increase the quantizer for macroblocks close to borders", FF_MPV_OFFSET(border_masking), AV_OPT_TYPE_FLOAT, {.dbl = 0 }, -FLT_MAX, FLT_MAX, FF_MPV_OPT_FLAGS},    \
 600 {"lmin", "minimum Lagrange factor (VBR)",                           FF_MPV_OFFSET(lmin), AV_OPT_TYPE_INT, {.i64 =  2*FF_QP2LAMBDA }, 0, INT_MAX, FF_MPV_OPT_FLAGS },            \
 601 {"lmax", "maximum Lagrange factor (VBR)",                           FF_MPV_OFFSET(lmax), AV_OPT_TYPE_INT, {.i64 = 31*FF_QP2LAMBDA }, 0, INT_MAX, FF_MPV_OPT_FLAGS },            \
 602 {"ibias", "intra quant bias",                                       FF_MPV_OFFSET(intra_quant_bias), AV_OPT_TYPE_INT, {.i64 = FF_DEFAULT_QUANT_BIAS }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },   \
 603 {"pbias", "inter quant bias",                                       FF_MPV_OFFSET(inter_quant_bias), AV_OPT_TYPE_INT, {.i64 = FF_DEFAULT_QUANT_BIAS }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS },   \
 604 {"motion_est", "motion estimation algorithm",                       FF_MPV_OFFSET(motion_est), AV_OPT_TYPE_INT, {.i64 = FF_ME_EPZS }, FF_ME_ZERO, FF_ME_XONE, FF_MPV_OPT_FLAGS, "motion_est" }, \
 605 { "zero", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_ZERO }, 0, 0, FF_MPV_OPT_FLAGS, "motion_est" }, \
 606 { "epzs", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_EPZS }, 0, 0, FF_MPV_OPT_FLAGS, "motion_est" }, \
 607 { "xone", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = FF_ME_XONE }, 0, 0, FF_MPV_OPT_FLAGS, "motion_est" }, \
 608 {"b_strategy", "Strategy to choose between I/P/B-frames",           FF_MPV_OFFSET(b_frame_strategy), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 2, FF_MPV_OPT_FLAGS }, \
 609 {"b_sensitivity", "Adjust sensitivity of b_frame_strategy 1",       FF_MPV_OFFSET(b_sensitivity), AV_OPT_TYPE_INT, {.i64 = 40 }, 1, INT_MAX, FF_MPV_OPT_FLAGS }, \
 610 {"brd_scale", "Downscale frames for dynamic B-frame decision",      FF_MPV_OFFSET(brd_scale), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 3, FF_MPV_OPT_FLAGS }, \
 611 {"skip_threshold", "Frame skip threshold",                          FF_MPV_OFFSET(frame_skip_threshold), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \
 612 {"skip_factor", "Frame skip factor",                                FF_MPV_OFFSET(frame_skip_factor), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \
 613 {"skip_exp", "Frame skip exponent",                                 FF_MPV_OFFSET(frame_skip_exp), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \
 614 {"skip_cmp", "Frame skip compare function",                         FF_MPV_OFFSET(frame_skip_cmp), AV_OPT_TYPE_INT, {.i64 = FF_CMP_DCTMAX }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS, "cmp_func" }, \
 615 {"sc_threshold", "Scene change threshold",                          FF_MPV_OFFSET(scenechange_threshold), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \
 616 {"noise_reduction", "Noise reduction",                              FF_MPV_OFFSET(noise_reduction), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \
 617 {"mpeg_quant", "Use MPEG quantizers instead of H.263",              FF_MPV_OFFSET(mpeg_quant), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, FF_MPV_OPT_FLAGS }, \
 618 {"ps", "RTP payload size in bytes",                             FF_MPV_OFFSET(rtp_payload_size), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \
 619 {"mepc", "Motion estimation bitrate penalty compensation (1.0 = 256)", FF_MPV_OFFSET(me_penalty_compensation), AV_OPT_TYPE_INT, {.i64 = 256 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \
 620 {"mepre", "pre motion estimation", FF_MPV_OFFSET(me_pre), AV_OPT_TYPE_INT, {.i64 = 0 }, INT_MIN, INT_MAX, FF_MPV_OPT_FLAGS }, \
 621
 622 extern const AVOption ff_mpv_generic_options[];
 623
 624 /**
 625  * Set the given MpegEncContext to common defaults (same for encoding
 626  * and decoding).  The changed fields will not depend upon the prior
 627  * state of the MpegEncContext.
 628  */
 629 void ff_mpv_common_defaults(MpegEncContext *s);
 630
 631 int ff_mpv_common_init(MpegEncContext *s);
 632 void ff_mpv_common_init_arm(MpegEncContext *s);
 633 void ff_mpv_common_init_neon(MpegEncContext *s);
 634 void ff_mpv_common_init_ppc(MpegEncContext *s);
 635 void ff_mpv_common_init_x86(MpegEncContext *s);
 636
 637 int ff_mpv_common_frame_size_change(MpegEncContext *s);
 638 void ff_mpv_common_end(MpegEncContext *s);
 639
 640 void ff_mpv_decode_defaults(MpegEncContext *s);
 641 void ff_mpv_decode_mb(MpegEncContext *s, int16_t block[12][64]);
 642 void ff_mpv_report_decode_progress(MpegEncContext *s);
 643
 644 int ff_mpv_frame_start(MpegEncContext *s, AVCodecContext *avctx);
 645 void ff_mpv_frame_end(MpegEncContext *s);
 646
 647 int ff_mpv_encode_init(AVCodecContext *avctx);
 648 void ff_mpv_encode_init_x86(MpegEncContext *s);
 649
 650 int ff_mpv_encode_end(AVCodecContext *avctx);
 651 int ff_mpv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
 652                           const AVFrame *frame, int *got_packet);
 653
 654 void ff_clean_intra_table_entries(MpegEncContext *s);
 655 void ff_mpeg_draw_horiz_band(MpegEncContext *s, int y, int h);
 656 void ff_mpeg_flush(AVCodecContext *avctx);
 657 void ff_print_debug_info(MpegEncContext *s, Picture *p);
 658 void ff_write_quant_matrix(PutBitContext *pb, uint16_t *matrix);
 659
 660 int ff_update_duplicate_context(MpegEncContext *dst, MpegEncContext *src);
 661 int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src);
 662 void ff_set_qscale(MpegEncContext * s, int qscale);
 663
 664 void ff_mpv_idct_init(MpegEncContext *s);
 665 void ff_convert_matrix(MpegEncContext *s, int (*qmat)[64], uint16_t (*qmat16)[2][64],
 666                        const uint16_t *quant_matrix, int bias, int qmin, int qmax, int intra);
 667 int ff_dct_quantize_c(MpegEncContext *s, int16_t *block, int n, int qscale, int *overflow);
 668
 669 void ff_init_block_index(MpegEncContext *s);
 670
 671 void ff_mpv_motion(MpegEncContext *s,
 672                    uint8_t *dest_y, uint8_t *dest_cb,
 673                    uint8_t *dest_cr, int dir,
 674                    uint8_t **ref_picture,
 675                    op_pixels_func (*pix_op)[4],
 676                    qpel_mc_func (*qpix_op)[16]);
 677
 678 static inline void ff_update_block_index(MpegEncContext *s){
 679     const int block_size = 8;
 680
 681     s->block_index[0]+=2;
 682     s->block_index[1]+=2;
 683     s->block_index[2]+=2;
 684     s->block_index[3]+=2;
 685     s->block_index[4]++;
 686     s->block_index[5]++;
 687     s->dest[0]+= 2*block_size;
 688     s->dest[1]+= block_size;
 689     s->dest[2]+= block_size;
 690 }
 691
 692 static inline int get_bits_diff(MpegEncContext *s){
 693     const int bits= put_bits_count(&s->pb);
 694     const int last= s->last_bits;
 695
 696     s->last_bits = bits;
 697
 698     return bits - last;
 699 }
 700
 701 #endif /* AVCODEC_MPEGVIDEO_H */