git.sesse.net Git - ffmpeg/blob - libavcodec/h264.h

   1 /*
   2  * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
   3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file libavcodec/h264.h
  24  * H.264 / AVC / MPEG4 part10 codec.
  25  * @author Michael Niedermayer <michaelni@gmx.at>
  26  */
  27
  28 #ifndef AVCODEC_H264_H
  29 #define AVCODEC_H264_H
  30
  31 #include "dsputil.h"
  32 #include "cabac.h"
  33 #include "mpegvideo.h"
  34 #include "h264pred.h"
  35 #include "rectangle.h"
  36
  37 #define interlaced_dct interlaced_dct_is_a_bad_name
  38 #define mb_intra mb_intra_is_not_initialized_see_mb_type
  39
  40 #define LUMA_DC_BLOCK_INDEX   25
  41 #define CHROMA_DC_BLOCK_INDEX 26
  42
  43 #define CHROMA_DC_COEFF_TOKEN_VLC_BITS 8
  44 #define COEFF_TOKEN_VLC_BITS           8
  45 #define TOTAL_ZEROS_VLC_BITS           9
  46 #define CHROMA_DC_TOTAL_ZEROS_VLC_BITS 3
  47 #define RUN_VLC_BITS                   3
  48 #define RUN7_VLC_BITS                  6
  49
  50 #define MAX_SPS_COUNT 32
  51 #define MAX_PPS_COUNT 256
  52
  53 #define MAX_MMCO_COUNT 66
  54
  55 #define MAX_DELAYED_PIC_COUNT 16
  56
  57 /* Compiling in interlaced support reduces the speed
  58  * of progressive decoding by about 2%. */
  59 #define ALLOW_INTERLACE
  60
  61 #define ALLOW_NOCHROMA
  62
  63 /**
  64  * The maximum number of slices supported by the decoder.
  65  * must be a power of 2
  66  */
  67 #define MAX_SLICES 16
  68
  69 #ifdef ALLOW_INTERLACE
  70 #define MB_MBAFF h->mb_mbaff
  71 #define MB_FIELD h->mb_field_decoding_flag
  72 #define FRAME_MBAFF h->mb_aff_frame
  73 #define FIELD_PICTURE (s->picture_structure != PICT_FRAME)
  74 #else
  75 #define MB_MBAFF 0
  76 #define MB_FIELD 0
  77 #define FRAME_MBAFF 0
  78 #define FIELD_PICTURE 0
  79 #undef  IS_INTERLACED
  80 #define IS_INTERLACED(mb_type) 0
  81 #endif
  82 #define FIELD_OR_MBAFF_PICTURE (FRAME_MBAFF || FIELD_PICTURE)
  83
  84 #ifdef ALLOW_NOCHROMA
  85 #define CHROMA h->sps.chroma_format_idc
  86 #else
  87 #define CHROMA 1
  88 #endif
  89
  90 #ifndef CABAC
  91 #define CABAC h->pps.cabac
  92 #endif
  93
  94 #define EXTENDED_SAR          255
  95
  96 #define MB_TYPE_REF0       MB_TYPE_ACPRED //dirty but it fits in 16 bit
  97 #define MB_TYPE_8x8DCT     0x01000000
  98 #define IS_REF0(a)         ((a) & MB_TYPE_REF0)
  99 #define IS_8x8DCT(a)       ((a) & MB_TYPE_8x8DCT)
 100
 101 /**
 102  * Value of Picture.reference when Picture is not a reference picture, but
 103  * is held for delayed output.
 104  */
 105 #define DELAYED_PIC_REF 4
 106
 107
 108 /* NAL unit types */
 109 enum {
 110     NAL_SLICE=1,
 111     NAL_DPA,
 112     NAL_DPB,
 113     NAL_DPC,
 114     NAL_IDR_SLICE,
 115     NAL_SEI,
 116     NAL_SPS,
 117     NAL_PPS,
 118     NAL_AUD,
 119     NAL_END_SEQUENCE,
 120     NAL_END_STREAM,
 121     NAL_FILLER_DATA,
 122     NAL_SPS_EXT,
 123     NAL_AUXILIARY_SLICE=19
 124 };
 125
 126 /**
 127  * SEI message types
 128  */
 129 typedef enum {
 130     SEI_BUFFERING_PERIOD             =  0, ///< buffering period (H.264, D.1.1)
 131     SEI_TYPE_PIC_TIMING              =  1, ///< picture timing
 132     SEI_TYPE_USER_DATA_UNREGISTERED  =  5, ///< unregistered user data
 133     SEI_TYPE_RECOVERY_POINT          =  6  ///< recovery point (frame # to decoder sync)
 134 } SEI_Type;
 135
 136 /**
 137  * pic_struct in picture timing SEI message
 138  */
 139 typedef enum {
 140     SEI_PIC_STRUCT_FRAME             = 0, ///<  0: %frame
 141     SEI_PIC_STRUCT_TOP_FIELD         = 1, ///<  1: top field
 142     SEI_PIC_STRUCT_BOTTOM_FIELD      = 2, ///<  2: bottom field
 143     SEI_PIC_STRUCT_TOP_BOTTOM        = 3, ///<  3: top field, bottom field, in that order
 144     SEI_PIC_STRUCT_BOTTOM_TOP        = 4, ///<  4: bottom field, top field, in that order
 145     SEI_PIC_STRUCT_TOP_BOTTOM_TOP    = 5, ///<  5: top field, bottom field, top field repeated, in that order
 146     SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///<  6: bottom field, top field, bottom field repeated, in that order
 147     SEI_PIC_STRUCT_FRAME_DOUBLING    = 7, ///<  7: %frame doubling
 148     SEI_PIC_STRUCT_FRAME_TRIPLING    = 8  ///<  8: %frame tripling
 149 } SEI_PicStructType;
 150
 151 /**
 152  * Sequence parameter set
 153  */
 154 typedef struct SPS{
 155
 156     int profile_idc;
 157     int level_idc;
 158     int chroma_format_idc;
 159     int transform_bypass;              ///< qpprime_y_zero_transform_bypass_flag
 160     int log2_max_frame_num;            ///< log2_max_frame_num_minus4 + 4
 161     int poc_type;                      ///< pic_order_cnt_type
 162     int log2_max_poc_lsb;              ///< log2_max_pic_order_cnt_lsb_minus4
 163     int delta_pic_order_always_zero_flag;
 164     int offset_for_non_ref_pic;
 165     int offset_for_top_to_bottom_field;
 166     int poc_cycle_length;              ///< num_ref_frames_in_pic_order_cnt_cycle
 167     int ref_frame_count;               ///< num_ref_frames
 168     int gaps_in_frame_num_allowed_flag;
 169     int mb_width;                      ///< pic_width_in_mbs_minus1 + 1
 170     int mb_height;                     ///< pic_height_in_map_units_minus1 + 1
 171     int frame_mbs_only_flag;
 172     int mb_aff;                        ///<mb_adaptive_frame_field_flag
 173     int direct_8x8_inference_flag;
 174     int crop;                   ///< frame_cropping_flag
 175     unsigned int crop_left;            ///< frame_cropping_rect_left_offset
 176     unsigned int crop_right;           ///< frame_cropping_rect_right_offset
 177     unsigned int crop_top;             ///< frame_cropping_rect_top_offset
 178     unsigned int crop_bottom;          ///< frame_cropping_rect_bottom_offset
 179     int vui_parameters_present_flag;
 180     AVRational sar;
 181     int video_signal_type_present_flag;
 182     int full_range;
 183     int colour_description_present_flag;
 184     enum AVColorPrimaries color_primaries;
 185     enum AVColorTransferCharacteristic color_trc;
 186     enum AVColorSpace colorspace;
 187     int timing_info_present_flag;
 188     uint32_t num_units_in_tick;
 189     uint32_t time_scale;
 190     int fixed_frame_rate_flag;
 191     short offset_for_ref_frame[256]; //FIXME dyn aloc?
 192     int bitstream_restriction_flag;
 193     int num_reorder_frames;
 194     int scaling_matrix_present;
 195     uint8_t scaling_matrix4[6][16];
 196     uint8_t scaling_matrix8[2][64];
 197     int nal_hrd_parameters_present_flag;
 198     int vcl_hrd_parameters_present_flag;
 199     int pic_struct_present_flag;
 200     int time_offset_length;
 201     int cpb_cnt;                       ///< See H.264 E.1.2
 202     int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 +1
 203     int cpb_removal_delay_length;      ///< cpb_removal_delay_length_minus1 + 1
 204     int dpb_output_delay_length;       ///< dpb_output_delay_length_minus1 + 1
 205     int bit_depth_luma;                ///< bit_depth_luma_minus8 + 8
 206     int bit_depth_chroma;              ///< bit_depth_chroma_minus8 + 8
 207     int residual_color_transform_flag; ///< residual_colour_transform_flag
 208 }SPS;
 209
 210 /**
 211  * Picture parameter set
 212  */
 213 typedef struct PPS{
 214     unsigned int sps_id;
 215     int cabac;                  ///< entropy_coding_mode_flag
 216     int pic_order_present;      ///< pic_order_present_flag
 217     int slice_group_count;      ///< num_slice_groups_minus1 + 1
 218     int mb_slice_group_map_type;
 219     unsigned int ref_count[2];  ///< num_ref_idx_l0/1_active_minus1 + 1
 220     int weighted_pred;          ///< weighted_pred_flag
 221     int weighted_bipred_idc;
 222     int init_qp;                ///< pic_init_qp_minus26 + 26
 223     int init_qs;                ///< pic_init_qs_minus26 + 26
 224     int chroma_qp_index_offset[2];
 225     int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
 226     int constrained_intra_pred; ///< constrained_intra_pred_flag
 227     int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
 228     int transform_8x8_mode;     ///< transform_8x8_mode_flag
 229     uint8_t scaling_matrix4[6][16];
 230     uint8_t scaling_matrix8[2][64];
 231     uint8_t chroma_qp_table[2][64];  ///< pre-scaled (with chroma_qp_index_offset) version of qp_table
 232     int chroma_qp_diff;
 233 }PPS;
 234
 235 /**
 236  * Memory management control operation opcode.
 237  */
 238 typedef enum MMCOOpcode{
 239     MMCO_END=0,
 240     MMCO_SHORT2UNUSED,
 241     MMCO_LONG2UNUSED,
 242     MMCO_SHORT2LONG,
 243     MMCO_SET_MAX_LONG,
 244     MMCO_RESET,
 245     MMCO_LONG,
 246 } MMCOOpcode;
 247
 248 /**
 249  * Memory management control operation.
 250  */
 251 typedef struct MMCO{
 252     MMCOOpcode opcode;
 253     int short_pic_num;  ///< pic_num without wrapping (pic_num & max_pic_num)
 254     int long_arg;       ///< index, pic_num, or num long refs depending on opcode
 255 } MMCO;
 256
 257 /**
 258  * H264Context
 259  */
 260 typedef struct H264Context{
 261     MpegEncContext s;
 262     int nal_ref_idc;
 263     int nal_unit_type;
 264     uint8_t *rbsp_buffer[2];
 265     unsigned int rbsp_buffer_size[2];
 266
 267     /**
 268       * Used to parse AVC variant of h264
 269       */
 270     int is_avc; ///< this flag is != 0 if codec is avc1
 271     int got_avcC; ///< flag used to parse avcC data only once
 272     int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
 273
 274     int chroma_qp[2]; //QPc
 275
 276     int qp_thresh;      ///< QP threshold to skip loopfilter
 277
 278     int prev_mb_skipped;
 279     int next_mb_skipped;
 280
 281     //prediction stuff
 282     int chroma_pred_mode;
 283     int intra16x16_pred_mode;
 284
 285     int top_mb_xy;
 286     int left_mb_xy[2];
 287
 288     int8_t intra4x4_pred_mode_cache[5*8];
 289     int8_t (*intra4x4_pred_mode)[8];
 290     H264PredContext hpc;
 291     unsigned int topleft_samples_available;
 292     unsigned int top_samples_available;
 293     unsigned int topright_samples_available;
 294     unsigned int left_samples_available;
 295     uint8_t (*top_borders[2])[16+2*8];
 296     uint8_t left_border[2*(17+2*9)];
 297
 298     /**
 299      * non zero coeff count cache.
 300      * is 64 if not available.
 301      */
 302     DECLARE_ALIGNED_8(uint8_t, non_zero_count_cache[6*8]);
 303     uint8_t (*non_zero_count)[32];
 304
 305     /**
 306      * Motion vector cache.
 307      */
 308     DECLARE_ALIGNED_8(int16_t, mv_cache[2][5*8][2]);
 309     DECLARE_ALIGNED_8(int8_t, ref_cache[2][5*8]);
 310 #define LIST_NOT_USED -1 //FIXME rename?
 311 #define PART_NOT_AVAILABLE -2
 312
 313     /**
 314      * is 1 if the specific list MV&references are set to 0,0,-2.
 315      */
 316     int mv_cache_clean[2];
 317
 318     /**
 319      * number of neighbors (top and/or left) that used 8x8 dct
 320      */
 321     int neighbor_transform_size;
 322
 323     /**
 324      * block_offset[ 0..23] for frame macroblocks
 325      * block_offset[24..47] for field macroblocks
 326      */
 327     int block_offset[2*(16+8)];
 328
 329     uint32_t *mb2b_xy; //FIXME are these 4 a good idea?
 330     uint32_t *mb2b8_xy;
 331     int b_stride; //FIXME use s->b4_stride
 332     int b8_stride;
 333
 334     int mb_linesize;   ///< may be equal to s->linesize or s->linesize*2, for mbaff
 335     int mb_uvlinesize;
 336
 337     int emu_edge_width;
 338     int emu_edge_height;
 339
 340     int halfpel_flag;
 341     int thirdpel_flag;
 342
 343     int unknown_svq3_flag;
 344     int next_slice_index;
 345
 346     SPS *sps_buffers[MAX_SPS_COUNT];
 347     SPS sps; ///< current sps
 348
 349     PPS *pps_buffers[MAX_PPS_COUNT];
 350     /**
 351      * current pps
 352      */
 353     PPS pps; //FIXME move to Picture perhaps? (->no) do we need that?
 354
 355     uint32_t dequant4_buffer[6][52][16];
 356     uint32_t dequant8_buffer[2][52][64];
 357     uint32_t (*dequant4_coeff[6])[16];
 358     uint32_t (*dequant8_coeff[2])[64];
 359     int dequant_coeff_pps;     ///< reinit tables when pps changes
 360
 361     int slice_num;
 362     uint16_t *slice_table_base;
 363     uint16_t *slice_table;     ///< slice_table_base + 2*mb_stride + 1
 364     int slice_type;
 365     int slice_type_nos;        ///< S free slice type (SI/SP are remapped to I/P)
 366     int slice_type_fixed;
 367
 368     //interlacing specific flags
 369     int mb_aff_frame;
 370     int mb_field_decoding_flag;
 371     int mb_mbaff;              ///< mb_aff_frame && mb_field_decoding_flag
 372
 373     DECLARE_ALIGNED_8(uint16_t, sub_mb_type[4]);
 374
 375     //POC stuff
 376     int poc_lsb;
 377     int poc_msb;
 378     int delta_poc_bottom;
 379     int delta_poc[2];
 380     int frame_num;
 381     int prev_poc_msb;             ///< poc_msb of the last reference pic for POC type 0
 382     int prev_poc_lsb;             ///< poc_lsb of the last reference pic for POC type 0
 383     int frame_num_offset;         ///< for POC type 2
 384     int prev_frame_num_offset;    ///< for POC type 2
 385     int prev_frame_num;           ///< frame_num of the last pic for POC type 1/2
 386
 387     /**
 388      * frame_num for frames or 2*frame_num+1 for field pics.
 389      */
 390     int curr_pic_num;
 391
 392     /**
 393      * max_frame_num or 2*max_frame_num for field pics.
 394      */
 395     int max_pic_num;
 396
 397     //Weighted pred stuff
 398     int use_weight;
 399     int use_weight_chroma;
 400     int luma_log2_weight_denom;
 401     int chroma_log2_weight_denom;
 402     int luma_weight[2][48];
 403     int luma_offset[2][48];
 404     int chroma_weight[2][48][2];
 405     int chroma_offset[2][48][2];
 406     int implicit_weight[48][48];
 407
 408     //deblock
 409     int deblocking_filter;         ///< disable_deblocking_filter_idc with 1<->0
 410     int slice_alpha_c0_offset;
 411     int slice_beta_offset;
 412
 413     int redundant_pic_count;
 414
 415     int direct_spatial_mv_pred;
 416     int dist_scale_factor[16];
 417     int dist_scale_factor_field[2][32];
 418     int map_col_to_list0[2][16+32];
 419     int map_col_to_list0_field[2][2][16+32];
 420
 421     /**
 422      * num_ref_idx_l0/1_active_minus1 + 1
 423      */
 424     unsigned int ref_count[2];   ///< counts frames or fields, depending on current mb mode
 425     unsigned int list_count;
 426     uint8_t *list_counts;            ///< Array of list_count per MB specifying the slice type
 427     Picture *short_ref[32];
 428     Picture *long_ref[32];
 429     Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
 430     Picture ref_list[2][48];         /**< 0..15: frame refs, 16..47: mbaff field refs.
 431                                           Reordered version of default_ref_list
 432                                           according to picture reordering in slice header */
 433     int ref2frm[MAX_SLICES][2][64];  ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
 434     Picture *delayed_pic[MAX_DELAYED_PIC_COUNT+2]; //FIXME size?
 435     int outputed_poc;
 436
 437     /**
 438      * memory management control operations buffer.
 439      */
 440     MMCO mmco[MAX_MMCO_COUNT];
 441     int mmco_index;
 442
 443     int long_ref_count;  ///< number of actual long term references
 444     int short_ref_count; ///< number of actual short term references
 445
 446     //data partitioning
 447     GetBitContext intra_gb;
 448     GetBitContext inter_gb;
 449     GetBitContext *intra_gb_ptr;
 450     GetBitContext *inter_gb_ptr;
 451
 452     DECLARE_ALIGNED_16(DCTELEM, mb[16*24]);
 453     DCTELEM mb_padding[256];        ///< as mb is addressed by scantable[i] and scantable is uint8_t we can either check that i is not too large or ensure that there is some unused stuff after mb
 454
 455     /**
 456      * Cabac
 457      */
 458     CABACContext cabac;
 459     uint8_t      cabac_state[460];
 460     int          cabac_init_idc;
 461
 462     /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0,1,2), 0x0? luma_cbp */
 463     uint16_t     *cbp_table;
 464     int cbp;
 465     int top_cbp;
 466     int left_cbp;
 467     /* chroma_pred_mode for i4x4 or i16x16, else 0 */
 468     uint8_t     *chroma_pred_mode_table;
 469     int         last_qscale_diff;
 470     int16_t     (*mvd_table[2])[2];
 471     DECLARE_ALIGNED_8(int16_t, mvd_cache[2][5*8][2]);
 472     uint8_t     *direct_table;
 473     uint8_t     direct_cache[5*8];
 474
 475     uint8_t zigzag_scan[16];
 476     uint8_t zigzag_scan8x8[64];
 477     uint8_t zigzag_scan8x8_cavlc[64];
 478     uint8_t field_scan[16];
 479     uint8_t field_scan8x8[64];
 480     uint8_t field_scan8x8_cavlc[64];
 481     const uint8_t *zigzag_scan_q0;
 482     const uint8_t *zigzag_scan8x8_q0;
 483     const uint8_t *zigzag_scan8x8_cavlc_q0;
 484     const uint8_t *field_scan_q0;
 485     const uint8_t *field_scan8x8_q0;
 486     const uint8_t *field_scan8x8_cavlc_q0;
 487
 488     int x264_build;
 489
 490     /**
 491      * @defgroup multithreading Members for slice based multithreading
 492      * @{
 493      */
 494     struct H264Context *thread_context[MAX_THREADS];
 495
 496     /**
 497      * current slice number, used to initalize slice_num of each thread/context
 498      */
 499     int current_slice;
 500
 501     /**
 502      * Max number of threads / contexts.
 503      * This is equal to AVCodecContext.thread_count unless
 504      * multithreaded decoding is impossible, in which case it is
 505      * reduced to 1.
 506      */
 507     int max_contexts;
 508
 509     /**
 510      *  1 if the single thread fallback warning has already been
 511      *  displayed, 0 otherwise.
 512      */
 513     int single_decode_warning;
 514
 515     int last_slice_type;
 516     /** @} */
 517
 518     int mb_xy;
 519
 520     uint32_t svq3_watermark_key;
 521
 522     /**
 523      * pic_struct in picture timing SEI message
 524      */
 525     SEI_PicStructType sei_pic_struct;
 526
 527     /**
 528      * Complement sei_pic_struct
 529      * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
 530      * However, soft telecined frames may have these values.
 531      * This is used in an attempt to flag soft telecine progressive.
 532      */
 533     int prev_interlaced_frame;
 534
 535     /**
 536      * Bit set of clock types for fields/frames in picture timing SEI message.
 537      * For each found ct_type, appropriate bit is set (e.g., bit 1 for
 538      * interlaced).
 539      */
 540     int sei_ct_type;
 541
 542     /**
 543      * dpb_output_delay in picture timing SEI message, see H.264 C.2.2
 544      */
 545     int sei_dpb_output_delay;
 546
 547     /**
 548      * cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
 549      */
 550     int sei_cpb_removal_delay;
 551
 552     /**
 553      * recovery_frame_cnt from SEI message
 554      *
 555      * Set to -1 if no recovery point SEI message found or to number of frames
 556      * before playback synchronizes. Frames having recovery point are key
 557      * frames.
 558      */
 559     int sei_recovery_frame_cnt;
 560
 561     int is_complex;
 562
 563     int luma_weight_flag[2];   ///< 7.4.3.2 luma_weight_lX_flag
 564     int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
 565
 566     // Timestamp stuff
 567     int sei_buffering_period_present;  ///< Buffering period SEI flag
 568     int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
 569 }H264Context;
 570
 571
 572 extern const uint8_t ff_h264_chroma_qp[52];
 573
 574
 575 /**
 576  * Decode SEI
 577  */
 578 int ff_h264_decode_sei(H264Context *h);
 579
 580 /**
 581  * Decode SPS
 582  */
 583 int ff_h264_decode_seq_parameter_set(H264Context *h);
 584
 585 /**
 586  * Decode PPS
 587  */
 588 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length);
 589
 590 /**
 591  * Decodes a network abstraction layer unit.
 592  * @param consumed is the number of bytes used as input
 593  * @param length is the length of the array
 594  * @param dst_length is the number of decoded bytes FIXME here or a decode rbsp tailing?
 595  * @returns decoded bytes, might be src+1 if no escapes
 596  */
 597 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length);
 598
 599 /**
 600  * identifies the exact end of the bitstream
 601  * @return the length of the trailing, or 0 if damaged
 602  */
 603 int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src);
 604
 605 /**
 606  * frees any data that may have been allocated in the H264 context like SPS, PPS etc.
 607  */
 608 av_cold void ff_h264_free_context(H264Context *h);
 609
 610 /**
 611  * reconstructs bitstream slice_type.
 612  */
 613 int ff_h264_get_slice_type(H264Context *h);
 614
 615 /**
 616  * allocates tables.
 617  * needs width/height
 618  */
 619 int ff_h264_alloc_tables(H264Context *h);
 620
 621 /**
 622  * fills the default_ref_list.
 623  */
 624 int ff_h264_fill_default_ref_list(H264Context *h);
 625
 626 int ff_h264_decode_ref_pic_list_reordering(H264Context *h);
 627 void ff_h264_fill_mbaff_ref_list(H264Context *h);
 628 void ff_h264_remove_all_refs(H264Context *h);
 629
 630 /**
 631  * Executes the reference picture marking (memory management control operations).
 632  */
 633 int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count);
 634
 635 int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb);
 636
 637
 638 /**
 639  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 640  */
 641 int ff_h264_check_intra4x4_pred_mode(H264Context *h);
 642
 643 /**
 644  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 645  */
 646 int ff_h264_check_intra_pred_mode(H264Context *h, int mode);
 647
 648 void ff_h264_write_back_intra_pred_mode(H264Context *h);
 649 void ff_h264_hl_decode_mb(H264Context *h);
 650 int ff_h264_frame_start(H264Context *h);
 651 av_cold int ff_h264_decode_init(AVCodecContext *avctx);
 652 av_cold int ff_h264_decode_end(AVCodecContext *avctx);
 653 av_cold void ff_h264_decode_init_vlc(void);
 654
 655 /**
 656  * decodes a macroblock
 657  * @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
 658  */
 659 int ff_h264_decode_mb_cavlc(H264Context *h);
 660
 661 /**
 662  * decodes a CABAC coded macroblock
 663  * @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
 664  */
 665 int ff_h264_decode_mb_cabac(H264Context *h);
 666
 667 void ff_h264_init_cabac_states(H264Context *h);
 668
 669 void ff_h264_direct_dist_scale_factor(H264Context * const h);
 670 void ff_h264_direct_ref_list_init(H264Context * const h);
 671 void ff_h264_pred_direct_motion(H264Context * const h, int *mb_type);
 672
 673 void ff_h264_filter_mb_fast( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize);
 674 void ff_h264_filter_mb( H264Context *h, int mb_x, int mb_y, uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr, unsigned int linesize, unsigned int uvlinesize);
 675
 676 /**
 677  * Reset SEI values at the beginning of the frame.
 678  *
 679  * @param h H.264 context.
 680  */
 681 void ff_h264_reset_sei(H264Context *h);
 682
 683
 684 /*
 685 o-o o-o
 686  / / /
 687 o-o o-o
 688  ,---'
 689 o-o o-o
 690  / / /
 691 o-o o-o
 692 */
 693 //This table must be here because scan8[constant] must be known at compiletime
 694 static const uint8_t scan8[16 + 2*4]={
 695  4+1*8, 5+1*8, 4+2*8, 5+2*8,
 696  6+1*8, 7+1*8, 6+2*8, 7+2*8,
 697  4+3*8, 5+3*8, 4+4*8, 5+4*8,
 698  6+3*8, 7+3*8, 6+4*8, 7+4*8,
 699  1+1*8, 2+1*8,
 700  1+2*8, 2+2*8,
 701  1+4*8, 2+4*8,
 702  1+5*8, 2+5*8,
 703 };
 704
 705 static av_always_inline uint32_t pack16to32(int a, int b){
 706 #if HAVE_BIGENDIAN
 707    return (b&0xFFFF) + (a<<16);
 708 #else
 709    return (a&0xFFFF) + (b<<16);
 710 #endif
 711 }
 712
 713 /**
 714  * gets the chroma qp.
 715  */
 716 static inline int get_chroma_qp(H264Context *h, int t, int qscale){
 717     return h->pps.chroma_qp_table[t][qscale];
 718 }
 719
 720 static inline void pred_pskip_motion(H264Context * const h, int * const mx, int * const my);
 721
 722 static av_always_inline void fill_caches(H264Context *h, int mb_type, int for_deblock){
 723     MpegEncContext * const s = &h->s;
 724     const int mb_xy= h->mb_xy;
 725     int topleft_xy, top_xy, topright_xy, left_xy[2];
 726     int topleft_type, top_type, topright_type, left_type[2];
 727     const uint8_t * left_block;
 728     int topleft_partition= -1;
 729     int i;
 730     static const uint8_t left_block_options[4][8]={
 731         {0,1,2,3,7,10,8,11},
 732         {2,2,3,3,8,11,8,11},
 733         {0,0,1,1,7,10,7,10},
 734         {0,2,0,2,7,10,7,10}
 735     };
 736
 737     top_xy     = mb_xy  - (s->mb_stride << FIELD_PICTURE);
 738
 739     //FIXME deblocking could skip the intra and nnz parts.
 740 //     if(for_deblock && (h->slice_num == 1 || h->slice_table[mb_xy] == h->slice_table[top_xy]) && !FRAME_MBAFF)
 741 //         return;
 742
 743     /* Wow, what a mess, why didn't they simplify the interlacing & intra
 744      * stuff, I can't imagine that these complex rules are worth it. */
 745
 746     topleft_xy = top_xy - 1;
 747     topright_xy= top_xy + 1;
 748     left_xy[1] = left_xy[0] = mb_xy-1;
 749     left_block = left_block_options[0];
 750     if(FRAME_MBAFF){
 751         const int pair_xy          = s->mb_x     + (s->mb_y & ~1)*s->mb_stride;
 752         const int top_pair_xy      = pair_xy     - s->mb_stride;
 753         const int topleft_pair_xy  = top_pair_xy - 1;
 754         const int topright_pair_xy = top_pair_xy + 1;
 755         const int topleft_mb_field_flag  = IS_INTERLACED(s->current_picture.mb_type[topleft_pair_xy]);
 756         const int top_mb_field_flag      = IS_INTERLACED(s->current_picture.mb_type[top_pair_xy]);
 757         const int topright_mb_field_flag = IS_INTERLACED(s->current_picture.mb_type[topright_pair_xy]);
 758         const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.mb_type[pair_xy-1]);
 759         const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
 760         const int bottom = (s->mb_y & 1);
 761         tprintf(s->avctx, "fill_caches: curr_mb_field_flag:%d, left_mb_field_flag:%d, topleft_mb_field_flag:%d, top_mb_field_flag:%d, topright_mb_field_flag:%d\n", curr_mb_field_flag, left_mb_field_flag, topleft_mb_field_flag, top_mb_field_flag, topright_mb_field_flag);
 762
 763         if (curr_mb_field_flag && (bottom || top_mb_field_flag)){
 764             top_xy -= s->mb_stride;
 765         }
 766         if (curr_mb_field_flag && (bottom || topleft_mb_field_flag)){
 767             topleft_xy -= s->mb_stride;
 768         } else if(bottom && !curr_mb_field_flag && left_mb_field_flag) {
 769             topleft_xy += s->mb_stride;
 770             // take top left mv from the middle of the mb, as opposed to all other modes which use the bottom right partition
 771             topleft_partition = 0;
 772         }
 773         if (curr_mb_field_flag && (bottom || topright_mb_field_flag)){
 774             topright_xy -= s->mb_stride;
 775         }
 776         if (left_mb_field_flag != curr_mb_field_flag) {
 777             left_xy[1] = left_xy[0] = pair_xy - 1;
 778             if (curr_mb_field_flag) {
 779                 left_xy[1] += s->mb_stride;
 780                 left_block = left_block_options[3];
 781             } else {
 782                 left_block= left_block_options[2 - bottom];
 783             }
 784         }
 785     }
 786
 787     h->top_mb_xy = top_xy;
 788     h->left_mb_xy[0] = left_xy[0];
 789     h->left_mb_xy[1] = left_xy[1];
 790     if(for_deblock){
 791         topleft_type = 0;
 792         topright_type = 0;
 793         top_type     = h->slice_table[top_xy     ] < 0xFFFF ? s->current_picture.mb_type[top_xy]     : 0;
 794         left_type[0] = h->slice_table[left_xy[0] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[0]] : 0;
 795         left_type[1] = h->slice_table[left_xy[1] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[1]] : 0;
 796
 797         if(!IS_INTRA(mb_type)){
 798             int list;
 799             for(list=0; list<h->list_count; list++){
 800                 int8_t *ref;
 801                 int y, b_xy;
 802                 if(!USES_LIST(mb_type, list)){
 803                     fill_rectangle(  h->mv_cache[list][scan8[0]], 4, 4, 8, pack16to32(0,0), 4);
 804                     *(uint32_t*)&h->ref_cache[list][scan8[ 0]] =
 805                     *(uint32_t*)&h->ref_cache[list][scan8[ 2]] =
 806                     *(uint32_t*)&h->ref_cache[list][scan8[ 8]] =
 807                     *(uint32_t*)&h->ref_cache[list][scan8[10]] = ((LIST_NOT_USED)&0xFF)*0x01010101;
 808                     continue;
 809                 }
 810
 811                 ref = &s->current_picture.ref_index[list][h->mb2b8_xy[mb_xy]];
 812                 *(uint32_t*)&h->ref_cache[list][scan8[ 0]] =
 813                 *(uint32_t*)&h->ref_cache[list][scan8[ 2]] = (pack16to32(ref[0],ref[1])&0x00FF00FF)*0x0101;
 814                 ref += h->b8_stride;
 815                 *(uint32_t*)&h->ref_cache[list][scan8[ 8]] =
 816                 *(uint32_t*)&h->ref_cache[list][scan8[10]] = (pack16to32(ref[0],ref[1])&0x00FF00FF)*0x0101;
 817
 818                 b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
 819                 for(y=0; y<4; y++){
 820                     *(uint64_t*)h->mv_cache[list][scan8[0]+0 + 8*y]= *(uint64_t*)s->current_picture.motion_val[list][b_xy + 0 + y*h->b_stride];
 821                     *(uint64_t*)h->mv_cache[list][scan8[0]+2 + 8*y]= *(uint64_t*)s->current_picture.motion_val[list][b_xy + 2 + y*h->b_stride];
 822                 }
 823
 824             }
 825         }
 826     }else{
 827         topleft_type = h->slice_table[topleft_xy ] == h->slice_num ? s->current_picture.mb_type[topleft_xy] : 0;
 828         top_type     = h->slice_table[top_xy     ] == h->slice_num ? s->current_picture.mb_type[top_xy]     : 0;
 829         topright_type= h->slice_table[topright_xy] == h->slice_num ? s->current_picture.mb_type[topright_xy]: 0;
 830         left_type[0] = h->slice_table[left_xy[0] ] == h->slice_num ? s->current_picture.mb_type[left_xy[0]] : 0;
 831         left_type[1] = h->slice_table[left_xy[1] ] == h->slice_num ? s->current_picture.mb_type[left_xy[1]] : 0;
 832
 833     if(IS_INTRA(mb_type)){
 834         int type_mask= h->pps.constrained_intra_pred ? IS_INTRA(-1) : -1;
 835         h->topleft_samples_available=
 836         h->top_samples_available=
 837         h->left_samples_available= 0xFFFF;
 838         h->topright_samples_available= 0xEEEA;
 839
 840         if(!(top_type & type_mask)){
 841             h->topleft_samples_available= 0xB3FF;
 842             h->top_samples_available= 0x33FF;
 843             h->topright_samples_available= 0x26EA;
 844         }
 845         if(IS_INTERLACED(mb_type) != IS_INTERLACED(left_type[0])){
 846             if(IS_INTERLACED(mb_type)){
 847                 if(!(left_type[0] & type_mask)){
 848                     h->topleft_samples_available&= 0xDFFF;
 849                     h->left_samples_available&= 0x5FFF;
 850                 }
 851                 if(!(left_type[1] & type_mask)){
 852                     h->topleft_samples_available&= 0xFF5F;
 853                     h->left_samples_available&= 0xFF5F;
 854                 }
 855             }else{
 856                 int left_typei = h->slice_table[left_xy[0] + s->mb_stride ] == h->slice_num
 857                                 ? s->current_picture.mb_type[left_xy[0] + s->mb_stride] : 0;
 858                 assert(left_xy[0] == left_xy[1]);
 859                 if(!((left_typei & type_mask) && (left_type[0] & type_mask))){
 860                     h->topleft_samples_available&= 0xDF5F;
 861                     h->left_samples_available&= 0x5F5F;
 862                 }
 863             }
 864         }else{
 865             if(!(left_type[0] & type_mask)){
 866                 h->topleft_samples_available&= 0xDF5F;
 867                 h->left_samples_available&= 0x5F5F;
 868             }
 869         }
 870
 871         if(!(topleft_type & type_mask))
 872             h->topleft_samples_available&= 0x7FFF;
 873
 874         if(!(topright_type & type_mask))
 875             h->topright_samples_available&= 0xFBFF;
 876
 877         if(IS_INTRA4x4(mb_type)){
 878             if(IS_INTRA4x4(top_type)){
 879                 h->intra4x4_pred_mode_cache[4+8*0]= h->intra4x4_pred_mode[top_xy][4];
 880                 h->intra4x4_pred_mode_cache[5+8*0]= h->intra4x4_pred_mode[top_xy][5];
 881                 h->intra4x4_pred_mode_cache[6+8*0]= h->intra4x4_pred_mode[top_xy][6];
 882                 h->intra4x4_pred_mode_cache[7+8*0]= h->intra4x4_pred_mode[top_xy][3];
 883             }else{
 884                 int pred;
 885                 if(!(top_type & type_mask))
 886                     pred= -1;
 887                 else{
 888                     pred= 2;
 889                 }
 890                 h->intra4x4_pred_mode_cache[4+8*0]=
 891                 h->intra4x4_pred_mode_cache[5+8*0]=
 892                 h->intra4x4_pred_mode_cache[6+8*0]=
 893                 h->intra4x4_pred_mode_cache[7+8*0]= pred;
 894             }
 895             for(i=0; i<2; i++){
 896                 if(IS_INTRA4x4(left_type[i])){
 897                     h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[0+2*i]];
 898                     h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[1+2*i]];
 899                 }else{
 900                     int pred;
 901                     if(!(left_type[i] & type_mask))
 902                         pred= -1;
 903                     else{
 904                         pred= 2;
 905                     }
 906                     h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]=
 907                     h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= pred;
 908                 }
 909             }
 910         }
 911     }
 912     }
 913
 914
 915 /*
 916 0 . T T. T T T T
 917 1 L . .L . . . .
 918 2 L . .L . . . .
 919 3 . T TL . . . .
 920 4 L . .L . . . .
 921 5 L . .. . . . .
 922 */
 923 //FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
 924     if(top_type){
 925         h->non_zero_count_cache[4+8*0]= h->non_zero_count[top_xy][4];
 926         h->non_zero_count_cache[5+8*0]= h->non_zero_count[top_xy][5];
 927         h->non_zero_count_cache[6+8*0]= h->non_zero_count[top_xy][6];
 928         h->non_zero_count_cache[7+8*0]= h->non_zero_count[top_xy][3];
 929
 930         h->non_zero_count_cache[1+8*0]= h->non_zero_count[top_xy][9];
 931         h->non_zero_count_cache[2+8*0]= h->non_zero_count[top_xy][8];
 932
 933         h->non_zero_count_cache[1+8*3]= h->non_zero_count[top_xy][12];
 934         h->non_zero_count_cache[2+8*3]= h->non_zero_count[top_xy][11];
 935
 936     }else{
 937         h->non_zero_count_cache[4+8*0]=
 938         h->non_zero_count_cache[5+8*0]=
 939         h->non_zero_count_cache[6+8*0]=
 940         h->non_zero_count_cache[7+8*0]=
 941
 942         h->non_zero_count_cache[1+8*0]=
 943         h->non_zero_count_cache[2+8*0]=
 944
 945         h->non_zero_count_cache[1+8*3]=
 946         h->non_zero_count_cache[2+8*3]= CABAC && !IS_INTRA(mb_type) ? 0 : 64;
 947
 948     }
 949
 950     for (i=0; i<2; i++) {
 951         if(left_type[i]){
 952             h->non_zero_count_cache[3+8*1 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[0+2*i]];
 953             h->non_zero_count_cache[3+8*2 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[1+2*i]];
 954             h->non_zero_count_cache[0+8*1 +   8*i]= h->non_zero_count[left_xy[i]][left_block[4+2*i]];
 955             h->non_zero_count_cache[0+8*4 +   8*i]= h->non_zero_count[left_xy[i]][left_block[5+2*i]];
 956         }else{
 957             h->non_zero_count_cache[3+8*1 + 2*8*i]=
 958             h->non_zero_count_cache[3+8*2 + 2*8*i]=
 959             h->non_zero_count_cache[0+8*1 +   8*i]=
 960             h->non_zero_count_cache[0+8*4 +   8*i]= CABAC && !IS_INTRA(mb_type) ? 0 : 64;
 961         }
 962     }
 963
 964     if( CABAC ) {
 965         // top_cbp
 966         if(top_type) {
 967             h->top_cbp = h->cbp_table[top_xy];
 968         } else if(IS_INTRA(mb_type)) {
 969             h->top_cbp = 0x1C0;
 970         } else {
 971             h->top_cbp = 0;
 972         }
 973         // left_cbp
 974         if (left_type[0]) {
 975             h->left_cbp = h->cbp_table[left_xy[0]] & 0x1f0;
 976         } else if(IS_INTRA(mb_type)) {
 977             h->left_cbp = 0x1C0;
 978         } else {
 979             h->left_cbp = 0;
 980         }
 981         if (left_type[0]) {
 982             h->left_cbp |= ((h->cbp_table[left_xy[0]]>>((left_block[0]&(~1))+1))&0x1) << 1;
 983         }
 984         if (left_type[1]) {
 985             h->left_cbp |= ((h->cbp_table[left_xy[1]]>>((left_block[2]&(~1))+1))&0x1) << 3;
 986         }
 987     }
 988
 989 #if 1
 990     if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
 991         int list;
 992         for(list=0; list<h->list_count; list++){
 993             if(!USES_LIST(mb_type, list) && !IS_DIRECT(mb_type) && !h->deblocking_filter){
 994                 /*if(!h->mv_cache_clean[list]){
 995                     memset(h->mv_cache [list],  0, 8*5*2*sizeof(int16_t)); //FIXME clean only input? clean at all?
 996                     memset(h->ref_cache[list], PART_NOT_AVAILABLE, 8*5*sizeof(int8_t));
 997                     h->mv_cache_clean[list]= 1;
 998                 }*/
 999                 continue;
1000             }
1001             h->mv_cache_clean[list]= 0;
1002
1003             if(USES_LIST(top_type, list)){
1004                 const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
1005                 const int b8_xy= h->mb2b8_xy[top_xy] + h->b8_stride;
1006                 *(uint32_t*)h->mv_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 0];
1007                 *(uint32_t*)h->mv_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 1];
1008                 *(uint32_t*)h->mv_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 2];
1009                 *(uint32_t*)h->mv_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + 3];
1010                 h->ref_cache[list][scan8[0] + 0 - 1*8]=
1011                 h->ref_cache[list][scan8[0] + 1 - 1*8]= s->current_picture.ref_index[list][b8_xy + 0];
1012                 h->ref_cache[list][scan8[0] + 2 - 1*8]=
1013                 h->ref_cache[list][scan8[0] + 3 - 1*8]= s->current_picture.ref_index[list][b8_xy + 1];
1014             }else{
1015                 *(uint32_t*)h->mv_cache [list][scan8[0] + 0 - 1*8]=
1016                 *(uint32_t*)h->mv_cache [list][scan8[0] + 1 - 1*8]=
1017                 *(uint32_t*)h->mv_cache [list][scan8[0] + 2 - 1*8]=
1018                 *(uint32_t*)h->mv_cache [list][scan8[0] + 3 - 1*8]= 0;
1019                 *(uint32_t*)&h->ref_cache[list][scan8[0] + 0 - 1*8]= ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101;
1020             }
1021
1022             for(i=0; i<2; i++){
1023                 int cache_idx = scan8[0] - 1 + i*2*8;
1024                 if(USES_LIST(left_type[i], list)){
1025                     const int b_xy= h->mb2b_xy[left_xy[i]] + 3;
1026                     const int b8_xy= h->mb2b8_xy[left_xy[i]] + 1;
1027                     *(uint32_t*)h->mv_cache[list][cache_idx  ]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[0+i*2]];
1028                     *(uint32_t*)h->mv_cache[list][cache_idx+8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[1+i*2]];
1029                     h->ref_cache[list][cache_idx  ]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[0+i*2]>>1)];
1030                     h->ref_cache[list][cache_idx+8]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[1+i*2]>>1)];
1031                 }else{
1032                     *(uint32_t*)h->mv_cache [list][cache_idx  ]=
1033                     *(uint32_t*)h->mv_cache [list][cache_idx+8]= 0;
1034                     h->ref_cache[list][cache_idx  ]=
1035                     h->ref_cache[list][cache_idx+8]= left_type[i] ? LIST_NOT_USED : PART_NOT_AVAILABLE;
1036                 }
1037             }
1038
1039             if(for_deblock || ((IS_DIRECT(mb_type) && !h->direct_spatial_mv_pred) && !FRAME_MBAFF))
1040                 continue;
1041
1042             if(USES_LIST(topleft_type, list)){
1043                 const int b_xy = h->mb2b_xy[topleft_xy] + 3 + h->b_stride + (topleft_partition & 2*h->b_stride);
1044                 const int b8_xy= h->mb2b8_xy[topleft_xy] + 1 + (topleft_partition & h->b8_stride);
1045                 *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
1046                 h->ref_cache[list][scan8[0] - 1 - 1*8]= s->current_picture.ref_index[list][b8_xy];
1047             }else{
1048                 *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= 0;
1049                 h->ref_cache[list][scan8[0] - 1 - 1*8]= topleft_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
1050             }
1051
1052             if(USES_LIST(topright_type, list)){
1053                 const int b_xy= h->mb2b_xy[topright_xy] + 3*h->b_stride;
1054                 const int b8_xy= h->mb2b8_xy[topright_xy] + h->b8_stride;
1055                 *(uint32_t*)h->mv_cache[list][scan8[0] + 4 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
1056                 h->ref_cache[list][scan8[0] + 4 - 1*8]= s->current_picture.ref_index[list][b8_xy];
1057             }else{
1058                 *(uint32_t*)h->mv_cache [list][scan8[0] + 4 - 1*8]= 0;
1059                 h->ref_cache[list][scan8[0] + 4 - 1*8]= topright_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
1060             }
1061
1062             if((IS_SKIP(mb_type) || IS_DIRECT(mb_type)) && !FRAME_MBAFF)
1063                 continue;
1064
1065             h->ref_cache[list][scan8[5 ]+1] =
1066             h->ref_cache[list][scan8[7 ]+1] =
1067             h->ref_cache[list][scan8[13]+1] =  //FIXME remove past 3 (init somewhere else)
1068             h->ref_cache[list][scan8[4 ]] =
1069             h->ref_cache[list][scan8[12]] = PART_NOT_AVAILABLE;
1070             *(uint32_t*)h->mv_cache [list][scan8[5 ]+1]=
1071             *(uint32_t*)h->mv_cache [list][scan8[7 ]+1]=
1072             *(uint32_t*)h->mv_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
1073             *(uint32_t*)h->mv_cache [list][scan8[4 ]]=
1074             *(uint32_t*)h->mv_cache [list][scan8[12]]= 0;
1075
1076             if( CABAC ) {
1077                 /* XXX beurk, Load mvd */
1078                 if(USES_LIST(top_type, list)){
1079                     const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
1080                     *(uint32_t*)h->mvd_cache[list][scan8[0] + 0 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 0];
1081                     *(uint32_t*)h->mvd_cache[list][scan8[0] + 1 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 1];
1082                     *(uint32_t*)h->mvd_cache[list][scan8[0] + 2 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 2];
1083                     *(uint32_t*)h->mvd_cache[list][scan8[0] + 3 - 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + 3];
1084                 }else{
1085                     *(uint32_t*)h->mvd_cache [list][scan8[0] + 0 - 1*8]=
1086                     *(uint32_t*)h->mvd_cache [list][scan8[0] + 1 - 1*8]=
1087                     *(uint32_t*)h->mvd_cache [list][scan8[0] + 2 - 1*8]=
1088                     *(uint32_t*)h->mvd_cache [list][scan8[0] + 3 - 1*8]= 0;
1089                 }
1090                 if(USES_LIST(left_type[0], list)){
1091                     const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
1092                     *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 0*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[0]];
1093                     *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 1*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[1]];
1094                 }else{
1095                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 0*8]=
1096                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 1*8]= 0;
1097                 }
1098                 if(USES_LIST(left_type[1], list)){
1099                     const int b_xy= h->mb2b_xy[left_xy[1]] + 3;
1100                     *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 2*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[2]];
1101                     *(uint32_t*)h->mvd_cache[list][scan8[0] - 1 + 3*8]= *(uint32_t*)h->mvd_table[list][b_xy + h->b_stride*left_block[3]];
1102                 }else{
1103                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 2*8]=
1104                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 3*8]= 0;
1105                 }
1106                 *(uint32_t*)h->mvd_cache [list][scan8[5 ]+1]=
1107                 *(uint32_t*)h->mvd_cache [list][scan8[7 ]+1]=
1108                 *(uint32_t*)h->mvd_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
1109                 *(uint32_t*)h->mvd_cache [list][scan8[4 ]]=
1110                 *(uint32_t*)h->mvd_cache [list][scan8[12]]= 0;
1111
1112                 if(h->slice_type_nos == FF_B_TYPE){
1113                     fill_rectangle(&h->direct_cache[scan8[0]], 4, 4, 8, 0, 1);
1114
1115                     if(IS_DIRECT(top_type)){
1116                         *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0x01010101;
1117                     }else if(IS_8X8(top_type)){
1118                         int b8_xy = h->mb2b8_xy[top_xy] + h->b8_stride;
1119                         h->direct_cache[scan8[0] + 0 - 1*8]= h->direct_table[b8_xy];
1120                         h->direct_cache[scan8[0] + 2 - 1*8]= h->direct_table[b8_xy + 1];
1121                     }else{
1122                         *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0;
1123                     }
1124
1125                     if(IS_DIRECT(left_type[0]))
1126                         h->direct_cache[scan8[0] - 1 + 0*8]= 1;
1127                     else if(IS_8X8(left_type[0]))
1128                         h->direct_cache[scan8[0] - 1 + 0*8]= h->direct_table[h->mb2b8_xy[left_xy[0]] + 1 + h->b8_stride*(left_block[0]>>1)];
1129                     else
1130                         h->direct_cache[scan8[0] - 1 + 0*8]= 0;
1131
1132                     if(IS_DIRECT(left_type[1]))
1133                         h->direct_cache[scan8[0] - 1 + 2*8]= 1;
1134                     else if(IS_8X8(left_type[1]))
1135                         h->direct_cache[scan8[0] - 1 + 2*8]= h->direct_table[h->mb2b8_xy[left_xy[1]] + 1 + h->b8_stride*(left_block[2]>>1)];
1136                     else
1137                         h->direct_cache[scan8[0] - 1 + 2*8]= 0;
1138                 }
1139             }
1140
1141             if(FRAME_MBAFF){
1142 #define MAP_MVS\
1143                     MAP_F2F(scan8[0] - 1 - 1*8, topleft_type)\
1144                     MAP_F2F(scan8[0] + 0 - 1*8, top_type)\
1145                     MAP_F2F(scan8[0] + 1 - 1*8, top_type)\
1146                     MAP_F2F(scan8[0] + 2 - 1*8, top_type)\
1147                     MAP_F2F(scan8[0] + 3 - 1*8, top_type)\
1148                     MAP_F2F(scan8[0] + 4 - 1*8, topright_type)\
1149                     MAP_F2F(scan8[0] - 1 + 0*8, left_type[0])\
1150                     MAP_F2F(scan8[0] - 1 + 1*8, left_type[0])\
1151                     MAP_F2F(scan8[0] - 1 + 2*8, left_type[1])\
1152                     MAP_F2F(scan8[0] - 1 + 3*8, left_type[1])
1153                 if(MB_FIELD){
1154 #define MAP_F2F(idx, mb_type)\
1155                     if(!IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
1156                         h->ref_cache[list][idx] <<= 1;\
1157                         h->mv_cache[list][idx][1] /= 2;\
1158                         h->mvd_cache[list][idx][1] /= 2;\
1159                     }
1160                     MAP_MVS
1161 #undef MAP_F2F
1162                 }else{
1163 #define MAP_F2F(idx, mb_type)\
1164                     if(IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
1165                         h->ref_cache[list][idx] >>= 1;\
1166                         h->mv_cache[list][idx][1] <<= 1;\
1167                         h->mvd_cache[list][idx][1] <<= 1;\
1168                     }
1169                     MAP_MVS
1170 #undef MAP_F2F
1171                 }
1172             }
1173         }
1174     }
1175 #endif
1176
1177     h->neighbor_transform_size= !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[0]);
1178 }
1179
1180 static void fill_decode_caches(H264Context *h, int mb_type){
1181     fill_caches(h, mb_type, 0);
1182 }
1183
1184 static void fill_filter_caches(H264Context *h, int mb_type){
1185     fill_caches(h, mb_type, 1);
1186 }
1187
1188 /**
1189  * gets the predicted intra4x4 prediction mode.
1190  */
1191 static inline int pred_intra_mode(H264Context *h, int n){
1192     const int index8= scan8[n];
1193     const int left= h->intra4x4_pred_mode_cache[index8 - 1];
1194     const int top = h->intra4x4_pred_mode_cache[index8 - 8];
1195     const int min= FFMIN(left, top);
1196
1197     tprintf(h->s.avctx, "mode:%d %d min:%d\n", left ,top, min);
1198
1199     if(min<0) return DC_PRED;
1200     else      return min;
1201 }
1202
1203 static inline void write_back_non_zero_count(H264Context *h){
1204     const int mb_xy= h->mb_xy;
1205
1206     h->non_zero_count[mb_xy][0]= h->non_zero_count_cache[7+8*1];
1207     h->non_zero_count[mb_xy][1]= h->non_zero_count_cache[7+8*2];
1208     h->non_zero_count[mb_xy][2]= h->non_zero_count_cache[7+8*3];
1209     h->non_zero_count[mb_xy][3]= h->non_zero_count_cache[7+8*4];
1210     h->non_zero_count[mb_xy][4]= h->non_zero_count_cache[4+8*4];
1211     h->non_zero_count[mb_xy][5]= h->non_zero_count_cache[5+8*4];
1212     h->non_zero_count[mb_xy][6]= h->non_zero_count_cache[6+8*4];
1213
1214     h->non_zero_count[mb_xy][9]= h->non_zero_count_cache[1+8*2];
1215     h->non_zero_count[mb_xy][8]= h->non_zero_count_cache[2+8*2];
1216     h->non_zero_count[mb_xy][7]= h->non_zero_count_cache[2+8*1];
1217
1218     h->non_zero_count[mb_xy][12]=h->non_zero_count_cache[1+8*5];
1219     h->non_zero_count[mb_xy][11]=h->non_zero_count_cache[2+8*5];
1220     h->non_zero_count[mb_xy][10]=h->non_zero_count_cache[2+8*4];
1221
1222     //FIXME sort better how things are stored in non_zero_count
1223
1224
1225     h->non_zero_count[mb_xy][13]= h->non_zero_count_cache[6+8*1];
1226     h->non_zero_count[mb_xy][14]= h->non_zero_count_cache[6+8*2];
1227     h->non_zero_count[mb_xy][15]= h->non_zero_count_cache[6+8*3];
1228     h->non_zero_count[mb_xy][16]= h->non_zero_count_cache[5+8*1];
1229     h->non_zero_count[mb_xy][17]= h->non_zero_count_cache[5+8*2];
1230     h->non_zero_count[mb_xy][18]= h->non_zero_count_cache[5+8*3];
1231     h->non_zero_count[mb_xy][19]= h->non_zero_count_cache[4+8*1];
1232     h->non_zero_count[mb_xy][20]= h->non_zero_count_cache[4+8*2];
1233     h->non_zero_count[mb_xy][21]= h->non_zero_count_cache[4+8*3];
1234
1235     h->non_zero_count[mb_xy][22]= h->non_zero_count_cache[1+8*1];
1236     h->non_zero_count[mb_xy][23]= h->non_zero_count_cache[1+8*4];
1237
1238 }
1239
1240 static inline void write_back_motion(H264Context *h, int mb_type){
1241     MpegEncContext * const s = &h->s;
1242     const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
1243     const int b8_xy= 2*s->mb_x + 2*s->mb_y*h->b8_stride;
1244     int list;
1245
1246     if(!USES_LIST(mb_type, 0))
1247         fill_rectangle(&s->current_picture.ref_index[0][b8_xy], 2, 2, h->b8_stride, (uint8_t)LIST_NOT_USED, 1);
1248
1249     for(list=0; list<h->list_count; list++){
1250         int y;
1251         if(!USES_LIST(mb_type, list))
1252             continue;
1253
1254         for(y=0; y<4; y++){
1255             *(uint64_t*)s->current_picture.motion_val[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mv_cache[list][scan8[0]+0 + 8*y];
1256             *(uint64_t*)s->current_picture.motion_val[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mv_cache[list][scan8[0]+2 + 8*y];
1257         }
1258         if( CABAC ) {
1259             if(IS_SKIP(mb_type))
1260                 fill_rectangle(h->mvd_table[list][b_xy], 4, 4, h->b_stride, 0, 4);
1261             else
1262             for(y=0; y<4; y++){
1263                 *(uint64_t*)h->mvd_table[list][b_xy + 0 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+0 + 8*y];
1264                 *(uint64_t*)h->mvd_table[list][b_xy + 2 + y*h->b_stride]= *(uint64_t*)h->mvd_cache[list][scan8[0]+2 + 8*y];
1265             }
1266         }
1267
1268         {
1269             int8_t *ref_index = &s->current_picture.ref_index[list][b8_xy];
1270             ref_index[0+0*h->b8_stride]= h->ref_cache[list][scan8[0]];
1271             ref_index[1+0*h->b8_stride]= h->ref_cache[list][scan8[4]];
1272             ref_index[0+1*h->b8_stride]= h->ref_cache[list][scan8[8]];
1273             ref_index[1+1*h->b8_stride]= h->ref_cache[list][scan8[12]];
1274         }
1275     }
1276
1277     if(h->slice_type_nos == FF_B_TYPE && CABAC){
1278         if(IS_8X8(mb_type)){
1279             uint8_t *direct_table = &h->direct_table[b8_xy];
1280             direct_table[1+0*h->b8_stride] = IS_DIRECT(h->sub_mb_type[1]) ? 1 : 0;
1281             direct_table[0+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[2]) ? 1 : 0;
1282             direct_table[1+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[3]) ? 1 : 0;
1283         }
1284     }
1285 }
1286
1287 static inline int get_dct8x8_allowed(H264Context *h){
1288     if(h->sps.direct_8x8_inference_flag)
1289         return !(*(uint64_t*)h->sub_mb_type & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8                )*0x0001000100010001ULL));
1290     else
1291         return !(*(uint64_t*)h->sub_mb_type & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8|MB_TYPE_DIRECT2)*0x0001000100010001ULL));
1292 }
1293
1294 static void predict_field_decoding_flag(H264Context *h){
1295     MpegEncContext * const s = &h->s;
1296     const int mb_xy= h->mb_xy;
1297     int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
1298                 ? s->current_picture.mb_type[mb_xy-1]
1299                 : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
1300                 ? s->current_picture.mb_type[mb_xy-s->mb_stride]
1301                 : 0;
1302     h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
1303 }
1304
1305 /**
1306  * decodes a P_SKIP or B_SKIP macroblock
1307  */
1308 static void decode_mb_skip(H264Context *h){
1309     MpegEncContext * const s = &h->s;
1310     const int mb_xy= h->mb_xy;
1311     int mb_type=0;
1312
1313     memset(h->non_zero_count[mb_xy], 0, 32);
1314     memset(h->non_zero_count_cache + 8, 0, 8*5); //FIXME ugly, remove pfui
1315
1316     if(MB_FIELD)
1317         mb_type|= MB_TYPE_INTERLACED;
1318
1319     if( h->slice_type_nos == FF_B_TYPE )
1320     {
1321         // just for fill_caches. pred_direct_motion will set the real mb_type
1322         mb_type|= MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2|MB_TYPE_SKIP;
1323
1324         fill_decode_caches(h, mb_type); //FIXME check what is needed and what not ...
1325         ff_h264_pred_direct_motion(h, &mb_type);
1326         mb_type|= MB_TYPE_SKIP;
1327     }
1328     else
1329     {
1330         int mx, my;
1331         mb_type|= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P1L0|MB_TYPE_SKIP;
1332
1333         fill_decode_caches(h, mb_type); //FIXME check what is needed and what not ...
1334         pred_pskip_motion(h, &mx, &my);
1335         fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, 0, 1);
1336         fill_rectangle(  h->mv_cache[0][scan8[0]], 4, 4, 8, pack16to32(mx,my), 4);
1337     }
1338
1339     write_back_motion(h, mb_type);
1340     s->current_picture.mb_type[mb_xy]= mb_type;
1341     s->current_picture.qscale_table[mb_xy]= s->qscale;
1342     h->slice_table[ mb_xy ]= h->slice_num;
1343     h->prev_mb_skipped= 1;
1344 }
1345
1346 #include "h264_mvpred.h" //For pred_pskip_motion()
1347
1348 #endif /* AVCODEC_H264_H */