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   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     int top_type;
 289     int left_type[2];
 290
 291     int8_t intra4x4_pred_mode_cache[5*8];
 292     int8_t (*intra4x4_pred_mode)[8];
 293     H264PredContext hpc;
 294     unsigned int topleft_samples_available;
 295     unsigned int top_samples_available;
 296     unsigned int topright_samples_available;
 297     unsigned int left_samples_available;
 298     uint8_t (*top_borders[2])[16+2*8];
 299     uint8_t left_border[2*(17+2*9)];
 300
 301     /**
 302      * non zero coeff count cache.
 303      * is 64 if not available.
 304      */
 305     DECLARE_ALIGNED_8(uint8_t, non_zero_count_cache)[6*8];
 306
 307     /*
 308     .UU.YYYY
 309     .UU.YYYY
 310     .vv.YYYY
 311     .VV.YYYY
 312     */
 313     uint8_t (*non_zero_count)[32];
 314
 315     /**
 316      * Motion vector cache.
 317      */
 318     DECLARE_ALIGNED_16(int16_t, mv_cache)[2][5*8][2];
 319     DECLARE_ALIGNED_8(int8_t, ref_cache)[2][5*8];
 320 #define LIST_NOT_USED -1 //FIXME rename?
 321 #define PART_NOT_AVAILABLE -2
 322
 323     /**
 324      * is 1 if the specific list MV&references are set to 0,0,-2.
 325      */
 326     int mv_cache_clean[2];
 327
 328     /**
 329      * number of neighbors (top and/or left) that used 8x8 dct
 330      */
 331     int neighbor_transform_size;
 332
 333     /**
 334      * block_offset[ 0..23] for frame macroblocks
 335      * block_offset[24..47] for field macroblocks
 336      */
 337     int block_offset[2*(16+8)];
 338
 339     uint32_t *mb2b_xy; //FIXME are these 4 a good idea?
 340     uint32_t *mb2b8_xy;
 341     int b_stride; //FIXME use s->b4_stride
 342     int b8_stride;
 343
 344     int mb_linesize;   ///< may be equal to s->linesize or s->linesize*2, for mbaff
 345     int mb_uvlinesize;
 346
 347     int emu_edge_width;
 348     int emu_edge_height;
 349
 350     int halfpel_flag;
 351     int thirdpel_flag;
 352
 353     int unknown_svq3_flag;
 354     int next_slice_index;
 355
 356     SPS *sps_buffers[MAX_SPS_COUNT];
 357     SPS sps; ///< current sps
 358
 359     PPS *pps_buffers[MAX_PPS_COUNT];
 360     /**
 361      * current pps
 362      */
 363     PPS pps; //FIXME move to Picture perhaps? (->no) do we need that?
 364
 365     uint32_t dequant4_buffer[6][52][16];
 366     uint32_t dequant8_buffer[2][52][64];
 367     uint32_t (*dequant4_coeff[6])[16];
 368     uint32_t (*dequant8_coeff[2])[64];
 369     int dequant_coeff_pps;     ///< reinit tables when pps changes
 370
 371     int slice_num;
 372     uint16_t *slice_table_base;
 373     uint16_t *slice_table;     ///< slice_table_base + 2*mb_stride + 1
 374     int slice_type;
 375     int slice_type_nos;        ///< S free slice type (SI/SP are remapped to I/P)
 376     int slice_type_fixed;
 377
 378     //interlacing specific flags
 379     int mb_aff_frame;
 380     int mb_field_decoding_flag;
 381     int mb_mbaff;              ///< mb_aff_frame && mb_field_decoding_flag
 382
 383     DECLARE_ALIGNED_8(uint16_t, sub_mb_type)[4];
 384
 385     //POC stuff
 386     int poc_lsb;
 387     int poc_msb;
 388     int delta_poc_bottom;
 389     int delta_poc[2];
 390     int frame_num;
 391     int prev_poc_msb;             ///< poc_msb of the last reference pic for POC type 0
 392     int prev_poc_lsb;             ///< poc_lsb of the last reference pic for POC type 0
 393     int frame_num_offset;         ///< for POC type 2
 394     int prev_frame_num_offset;    ///< for POC type 2
 395     int prev_frame_num;           ///< frame_num of the last pic for POC type 1/2
 396
 397     /**
 398      * frame_num for frames or 2*frame_num+1 for field pics.
 399      */
 400     int curr_pic_num;
 401
 402     /**
 403      * max_frame_num or 2*max_frame_num for field pics.
 404      */
 405     int max_pic_num;
 406
 407     //Weighted pred stuff
 408     int use_weight;
 409     int use_weight_chroma;
 410     int luma_log2_weight_denom;
 411     int chroma_log2_weight_denom;
 412     int luma_weight[2][48];
 413     int luma_offset[2][48];
 414     int chroma_weight[2][48][2];
 415     int chroma_offset[2][48][2];
 416     int implicit_weight[48][48];
 417
 418     //deblock
 419     int deblocking_filter;         ///< disable_deblocking_filter_idc with 1<->0
 420     int slice_alpha_c0_offset;
 421     int slice_beta_offset;
 422
 423     int redundant_pic_count;
 424
 425     int direct_spatial_mv_pred;
 426     int dist_scale_factor[16];
 427     int dist_scale_factor_field[2][32];
 428     int map_col_to_list0[2][16+32];
 429     int map_col_to_list0_field[2][2][16+32];
 430
 431     /**
 432      * num_ref_idx_l0/1_active_minus1 + 1
 433      */
 434     unsigned int ref_count[2];   ///< counts frames or fields, depending on current mb mode
 435     unsigned int list_count;
 436     uint8_t *list_counts;            ///< Array of list_count per MB specifying the slice type
 437     Picture *short_ref[32];
 438     Picture *long_ref[32];
 439     Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
 440     Picture ref_list[2][48];         /**< 0..15: frame refs, 16..47: mbaff field refs.
 441                                           Reordered version of default_ref_list
 442                                           according to picture reordering in slice header */
 443     int ref2frm[MAX_SLICES][2][64];  ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
 444     Picture *delayed_pic[MAX_DELAYED_PIC_COUNT+2]; //FIXME size?
 445     int outputed_poc;
 446
 447     /**
 448      * memory management control operations buffer.
 449      */
 450     MMCO mmco[MAX_MMCO_COUNT];
 451     int mmco_index;
 452
 453     int long_ref_count;  ///< number of actual long term references
 454     int short_ref_count; ///< number of actual short term references
 455
 456     //data partitioning
 457     GetBitContext intra_gb;
 458     GetBitContext inter_gb;
 459     GetBitContext *intra_gb_ptr;
 460     GetBitContext *inter_gb_ptr;
 461
 462     DECLARE_ALIGNED_16(DCTELEM, mb)[16*24];
 463     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
 464
 465     /**
 466      * Cabac
 467      */
 468     CABACContext cabac;
 469     uint8_t      cabac_state[460];
 470     int          cabac_init_idc;
 471
 472     /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0,1,2), 0x0? luma_cbp */
 473     uint16_t     *cbp_table;
 474     int cbp;
 475     int top_cbp;
 476     int left_cbp;
 477     /* chroma_pred_mode for i4x4 or i16x16, else 0 */
 478     uint8_t     *chroma_pred_mode_table;
 479     int         last_qscale_diff;
 480     int16_t     (*mvd_table[2])[2];
 481     DECLARE_ALIGNED_16(int16_t, mvd_cache)[2][5*8][2];
 482     uint8_t     *direct_table;
 483     uint8_t     direct_cache[5*8];
 484
 485     uint8_t zigzag_scan[16];
 486     uint8_t zigzag_scan8x8[64];
 487     uint8_t zigzag_scan8x8_cavlc[64];
 488     uint8_t field_scan[16];
 489     uint8_t field_scan8x8[64];
 490     uint8_t field_scan8x8_cavlc[64];
 491     const uint8_t *zigzag_scan_q0;
 492     const uint8_t *zigzag_scan8x8_q0;
 493     const uint8_t *zigzag_scan8x8_cavlc_q0;
 494     const uint8_t *field_scan_q0;
 495     const uint8_t *field_scan8x8_q0;
 496     const uint8_t *field_scan8x8_cavlc_q0;
 497
 498     int x264_build;
 499
 500     /**
 501      * @defgroup multithreading Members for slice based multithreading
 502      * @{
 503      */
 504     struct H264Context *thread_context[MAX_THREADS];
 505
 506     /**
 507      * current slice number, used to initalize slice_num of each thread/context
 508      */
 509     int current_slice;
 510
 511     /**
 512      * Max number of threads / contexts.
 513      * This is equal to AVCodecContext.thread_count unless
 514      * multithreaded decoding is impossible, in which case it is
 515      * reduced to 1.
 516      */
 517     int max_contexts;
 518
 519     /**
 520      *  1 if the single thread fallback warning has already been
 521      *  displayed, 0 otherwise.
 522      */
 523     int single_decode_warning;
 524
 525     int last_slice_type;
 526     /** @} */
 527
 528     int mb_xy;
 529
 530     uint32_t svq3_watermark_key;
 531
 532     /**
 533      * pic_struct in picture timing SEI message
 534      */
 535     SEI_PicStructType sei_pic_struct;
 536
 537     /**
 538      * Complement sei_pic_struct
 539      * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
 540      * However, soft telecined frames may have these values.
 541      * This is used in an attempt to flag soft telecine progressive.
 542      */
 543     int prev_interlaced_frame;
 544
 545     /**
 546      * Bit set of clock types for fields/frames in picture timing SEI message.
 547      * For each found ct_type, appropriate bit is set (e.g., bit 1 for
 548      * interlaced).
 549      */
 550     int sei_ct_type;
 551
 552     /**
 553      * dpb_output_delay in picture timing SEI message, see H.264 C.2.2
 554      */
 555     int sei_dpb_output_delay;
 556
 557     /**
 558      * cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
 559      */
 560     int sei_cpb_removal_delay;
 561
 562     /**
 563      * recovery_frame_cnt from SEI message
 564      *
 565      * Set to -1 if no recovery point SEI message found or to number of frames
 566      * before playback synchronizes. Frames having recovery point are key
 567      * frames.
 568      */
 569     int sei_recovery_frame_cnt;
 570
 571     int is_complex;
 572
 573     int luma_weight_flag[2];   ///< 7.4.3.2 luma_weight_lX_flag
 574     int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
 575
 576     // Timestamp stuff
 577     int sei_buffering_period_present;  ///< Buffering period SEI flag
 578     int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
 579 }H264Context;
 580
 581
 582 extern const uint8_t ff_h264_chroma_qp[52];
 583
 584 void ff_svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp);
 585
 586 void ff_svq3_add_idct_c(uint8_t *dst, DCTELEM *block, int stride, int qp, int dc);
 587
 588 /**
 589  * Decode SEI
 590  */
 591 int ff_h264_decode_sei(H264Context *h);
 592
 593 /**
 594  * Decode SPS
 595  */
 596 int ff_h264_decode_seq_parameter_set(H264Context *h);
 597
 598 /**
 599  * Decode PPS
 600  */
 601 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length);
 602
 603 /**
 604  * Decodes a network abstraction layer unit.
 605  * @param consumed is the number of bytes used as input
 606  * @param length is the length of the array
 607  * @param dst_length is the number of decoded bytes FIXME here or a decode rbsp tailing?
 608  * @returns decoded bytes, might be src+1 if no escapes
 609  */
 610 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length);
 611
 612 /**
 613  * identifies the exact end of the bitstream
 614  * @return the length of the trailing, or 0 if damaged
 615  */
 616 int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src);
 617
 618 /**
 619  * frees any data that may have been allocated in the H264 context like SPS, PPS etc.
 620  */
 621 av_cold void ff_h264_free_context(H264Context *h);
 622
 623 /**
 624  * reconstructs bitstream slice_type.
 625  */
 626 int ff_h264_get_slice_type(const H264Context *h);
 627
 628 /**
 629  * allocates tables.
 630  * needs width/height
 631  */
 632 int ff_h264_alloc_tables(H264Context *h);
 633
 634 /**
 635  * fills the default_ref_list.
 636  */
 637 int ff_h264_fill_default_ref_list(H264Context *h);
 638
 639 int ff_h264_decode_ref_pic_list_reordering(H264Context *h);
 640 void ff_h264_fill_mbaff_ref_list(H264Context *h);
 641 void ff_h264_remove_all_refs(H264Context *h);
 642
 643 /**
 644  * Executes the reference picture marking (memory management control operations).
 645  */
 646 int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count);
 647
 648 int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb);
 649
 650
 651 /**
 652  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 653  */
 654 int ff_h264_check_intra4x4_pred_mode(H264Context *h);
 655
 656 /**
 657  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 658  */
 659 int ff_h264_check_intra_pred_mode(H264Context *h, int mode);
 660
 661 void ff_h264_write_back_intra_pred_mode(H264Context *h);
 662 void ff_h264_hl_decode_mb(H264Context *h);
 663 int ff_h264_frame_start(H264Context *h);
 664 av_cold int ff_h264_decode_init(AVCodecContext *avctx);
 665 av_cold int ff_h264_decode_end(AVCodecContext *avctx);
 666 av_cold void ff_h264_decode_init_vlc(void);
 667
 668 /**
 669  * decodes a macroblock
 670  * @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
 671  */
 672 int ff_h264_decode_mb_cavlc(H264Context *h);
 673
 674 /**
 675  * decodes a CABAC coded macroblock
 676  * @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
 677  */
 678 int ff_h264_decode_mb_cabac(H264Context *h);
 679
 680 void ff_h264_init_cabac_states(H264Context *h);
 681
 682 void ff_h264_direct_dist_scale_factor(H264Context * const h);
 683 void ff_h264_direct_ref_list_init(H264Context * const h);
 684 void ff_h264_pred_direct_motion(H264Context * const h, int *mb_type);
 685
 686 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);
 687 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);
 688
 689 /**
 690  * Reset SEI values at the beginning of the frame.
 691  *
 692  * @param h H.264 context.
 693  */
 694 void ff_h264_reset_sei(H264Context *h);
 695
 696
 697 /*
 698 o-o o-o
 699  / / /
 700 o-o o-o
 701  ,---'
 702 o-o o-o
 703  / / /
 704 o-o o-o
 705 */
 706 //This table must be here because scan8[constant] must be known at compiletime
 707 static const uint8_t scan8[16 + 2*4]={
 708  4+1*8, 5+1*8, 4+2*8, 5+2*8,
 709  6+1*8, 7+1*8, 6+2*8, 7+2*8,
 710  4+3*8, 5+3*8, 4+4*8, 5+4*8,
 711  6+3*8, 7+3*8, 6+4*8, 7+4*8,
 712  1+1*8, 2+1*8,
 713  1+2*8, 2+2*8,
 714  1+4*8, 2+4*8,
 715  1+5*8, 2+5*8,
 716 };
 717
 718 static av_always_inline uint32_t pack16to32(int a, int b){
 719 #if HAVE_BIGENDIAN
 720    return (b&0xFFFF) + (a<<16);
 721 #else
 722    return (a&0xFFFF) + (b<<16);
 723 #endif
 724 }
 725
 726 /**
 727  * gets the chroma qp.
 728  */
 729 static inline int get_chroma_qp(H264Context *h, int t, int qscale){
 730     return h->pps.chroma_qp_table[t][qscale];
 731 }
 732
 733 static inline void pred_pskip_motion(H264Context * const h, int * const mx, int * const my);
 734
 735 static void fill_decode_caches(H264Context *h, int mb_type){
 736     MpegEncContext * const s = &h->s;
 737     const int mb_xy= h->mb_xy;
 738     int topleft_xy, top_xy, topright_xy, left_xy[2];
 739     int topleft_type, top_type, topright_type, left_type[2];
 740     const uint8_t * left_block;
 741     int topleft_partition= -1;
 742     int i;
 743     static const uint8_t left_block_options[4][16]={
 744         {0,1,2,3,7,10,8,11,7+0*8, 7+1*8, 7+2*8, 7+3*8, 2+0*8, 2+3*8, 2+1*8, 2+2*8},
 745         {2,2,3,3,8,11,8,11,7+2*8, 7+2*8, 7+3*8, 7+3*8, 2+1*8, 2+2*8, 2+1*8, 2+2*8},
 746         {0,0,1,1,7,10,7,10,7+0*8, 7+0*8, 7+1*8, 7+1*8, 2+0*8, 2+3*8, 2+0*8, 2+3*8},
 747         {0,2,0,2,7,10,7,10,7+0*8, 7+2*8, 7+0*8, 7+2*8, 2+0*8, 2+3*8, 2+0*8, 2+3*8}
 748     };
 749
 750     top_xy     = mb_xy  - (s->mb_stride << MB_FIELD);
 751
 752     /* Wow, what a mess, why didn't they simplify the interlacing & intra
 753      * stuff, I can't imagine that these complex rules are worth it. */
 754
 755     topleft_xy = top_xy - 1;
 756     topright_xy= top_xy + 1;
 757     left_xy[1] = left_xy[0] = mb_xy-1;
 758     left_block = left_block_options[0];
 759     if(FRAME_MBAFF){
 760         const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.mb_type[mb_xy-1]);
 761         const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
 762         if(s->mb_y&1){
 763             if (left_mb_field_flag != curr_mb_field_flag) {
 764                 left_xy[1] = left_xy[0] = mb_xy - s->mb_stride - 1;
 765                 if (curr_mb_field_flag) {
 766                     left_xy[1] += s->mb_stride;
 767                     left_block = left_block_options[3];
 768                 } else {
 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                     left_block = left_block_options[1];
 773                 }
 774             }
 775         }else{
 776             if(curr_mb_field_flag){
 777                 topleft_xy  += s->mb_stride & (((s->current_picture.mb_type[top_xy - 1]>>7)&1)-1);
 778                 topright_xy += s->mb_stride & (((s->current_picture.mb_type[top_xy + 1]>>7)&1)-1);
 779                 top_xy      += s->mb_stride & (((s->current_picture.mb_type[top_xy    ]>>7)&1)-1);
 780             }
 781             if (left_mb_field_flag != curr_mb_field_flag) {
 782                 left_xy[1] = left_xy[0] = mb_xy - 1;
 783                 if (curr_mb_field_flag) {
 784                     left_xy[1] += s->mb_stride;
 785                     left_block = left_block_options[3];
 786                 } else {
 787                     left_block = left_block_options[2];
 788                 }
 789             }
 790         }
 791     }
 792
 793     h->top_mb_xy = top_xy;
 794     h->left_mb_xy[0] = left_xy[0];
 795     h->left_mb_xy[1] = left_xy[1];
 796         topleft_type = h->slice_table[topleft_xy ] == h->slice_num ? s->current_picture.mb_type[topleft_xy] : 0;
 797         top_type     = h->slice_table[top_xy     ] == h->slice_num ? s->current_picture.mb_type[top_xy]     : 0;
 798         topright_type= h->slice_table[topright_xy] == h->slice_num ? s->current_picture.mb_type[topright_xy]: 0;
 799         left_type[0] = h->slice_table[left_xy[0] ] == h->slice_num ? s->current_picture.mb_type[left_xy[0]] : 0;
 800         left_type[1] = h->slice_table[left_xy[1] ] == h->slice_num ? s->current_picture.mb_type[left_xy[1]] : 0;
 801
 802         if(IS_INTRA(mb_type)){
 803             int type_mask= h->pps.constrained_intra_pred ? IS_INTRA(-1) : -1;
 804             h->topleft_samples_available=
 805             h->top_samples_available=
 806             h->left_samples_available= 0xFFFF;
 807             h->topright_samples_available= 0xEEEA;
 808
 809             if(!(top_type & type_mask)){
 810                 h->topleft_samples_available= 0xB3FF;
 811                 h->top_samples_available= 0x33FF;
 812                 h->topright_samples_available= 0x26EA;
 813             }
 814             if(IS_INTERLACED(mb_type) != IS_INTERLACED(left_type[0])){
 815                 if(IS_INTERLACED(mb_type)){
 816                     if(!(left_type[0] & type_mask)){
 817                         h->topleft_samples_available&= 0xDFFF;
 818                         h->left_samples_available&= 0x5FFF;
 819                     }
 820                     if(!(left_type[1] & type_mask)){
 821                         h->topleft_samples_available&= 0xFF5F;
 822                         h->left_samples_available&= 0xFF5F;
 823                     }
 824                 }else{
 825                     int left_typei = h->slice_table[left_xy[0] + s->mb_stride ] == h->slice_num
 826                                     ? s->current_picture.mb_type[left_xy[0] + s->mb_stride] : 0;
 827                     assert(left_xy[0] == left_xy[1]);
 828                     if(!((left_typei & type_mask) && (left_type[0] & type_mask))){
 829                         h->topleft_samples_available&= 0xDF5F;
 830                         h->left_samples_available&= 0x5F5F;
 831                     }
 832                 }
 833             }else{
 834                 if(!(left_type[0] & type_mask)){
 835                     h->topleft_samples_available&= 0xDF5F;
 836                     h->left_samples_available&= 0x5F5F;
 837                 }
 838             }
 839
 840             if(!(topleft_type & type_mask))
 841                 h->topleft_samples_available&= 0x7FFF;
 842
 843             if(!(topright_type & type_mask))
 844                 h->topright_samples_available&= 0xFBFF;
 845
 846             if(IS_INTRA4x4(mb_type)){
 847                 if(IS_INTRA4x4(top_type)){
 848                     h->intra4x4_pred_mode_cache[4+8*0]= h->intra4x4_pred_mode[top_xy][4];
 849                     h->intra4x4_pred_mode_cache[5+8*0]= h->intra4x4_pred_mode[top_xy][5];
 850                     h->intra4x4_pred_mode_cache[6+8*0]= h->intra4x4_pred_mode[top_xy][6];
 851                     h->intra4x4_pred_mode_cache[7+8*0]= h->intra4x4_pred_mode[top_xy][3];
 852                 }else{
 853                     int pred;
 854                     if(!(top_type & type_mask))
 855                         pred= -1;
 856                     else{
 857                         pred= 2;
 858                     }
 859                     h->intra4x4_pred_mode_cache[4+8*0]=
 860                     h->intra4x4_pred_mode_cache[5+8*0]=
 861                     h->intra4x4_pred_mode_cache[6+8*0]=
 862                     h->intra4x4_pred_mode_cache[7+8*0]= pred;
 863                 }
 864                 for(i=0; i<2; i++){
 865                     if(IS_INTRA4x4(left_type[i])){
 866                         h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[0+2*i]];
 867                         h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[1+2*i]];
 868                     }else{
 869                         int pred;
 870                         if(!(left_type[i] & type_mask))
 871                             pred= -1;
 872                         else{
 873                             pred= 2;
 874                         }
 875                         h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]=
 876                         h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= pred;
 877                     }
 878                 }
 879             }
 880         }
 881
 882
 883 /*
 884 0 . T T. T T T T
 885 1 L . .L . . . .
 886 2 L . .L . . . .
 887 3 . T TL . . . .
 888 4 L . .L . . . .
 889 5 L . .. . . . .
 890 */
 891 //FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
 892     if(top_type){
 893         *(uint32_t*)&h->non_zero_count_cache[4+8*0]= *(uint32_t*)&h->non_zero_count[top_xy][4+3*8];
 894             h->non_zero_count_cache[1+8*0]= h->non_zero_count[top_xy][1+1*8];
 895             h->non_zero_count_cache[2+8*0]= h->non_zero_count[top_xy][2+1*8];
 896
 897             h->non_zero_count_cache[1+8*3]= h->non_zero_count[top_xy][1+2*8];
 898             h->non_zero_count_cache[2+8*3]= h->non_zero_count[top_xy][2+2*8];
 899     }else {
 900             h->non_zero_count_cache[1+8*0]=
 901             h->non_zero_count_cache[2+8*0]=
 902
 903             h->non_zero_count_cache[1+8*3]=
 904             h->non_zero_count_cache[2+8*3]=
 905             *(uint32_t*)&h->non_zero_count_cache[4+8*0]= CABAC && !IS_INTRA(mb_type) ? 0 : 0x40404040;
 906     }
 907
 908     for (i=0; i<2; i++) {
 909         if(left_type[i]){
 910             h->non_zero_count_cache[3+8*1 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[8+0+2*i]];
 911             h->non_zero_count_cache[3+8*2 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[8+1+2*i]];
 912                 h->non_zero_count_cache[0+8*1 +   8*i]= h->non_zero_count[left_xy[i]][left_block[8+4+2*i]];
 913                 h->non_zero_count_cache[0+8*4 +   8*i]= h->non_zero_count[left_xy[i]][left_block[8+5+2*i]];
 914         }else{
 915                 h->non_zero_count_cache[3+8*1 + 2*8*i]=
 916                 h->non_zero_count_cache[3+8*2 + 2*8*i]=
 917                 h->non_zero_count_cache[0+8*1 +   8*i]=
 918                 h->non_zero_count_cache[0+8*4 +   8*i]= CABAC && !IS_INTRA(mb_type) ? 0 : 64;
 919         }
 920     }
 921
 922     if( CABAC ) {
 923         // top_cbp
 924         if(top_type) {
 925             h->top_cbp = h->cbp_table[top_xy];
 926         } else if(IS_INTRA(mb_type)) {
 927             h->top_cbp = 0x1C0;
 928         } else {
 929             h->top_cbp = 0;
 930         }
 931         // left_cbp
 932         if (left_type[0]) {
 933             h->left_cbp = h->cbp_table[left_xy[0]] & 0x1f0;
 934         } else if(IS_INTRA(mb_type)) {
 935             h->left_cbp = 0x1C0;
 936         } else {
 937             h->left_cbp = 0;
 938         }
 939         if (left_type[0]) {
 940             h->left_cbp |= ((h->cbp_table[left_xy[0]]>>((left_block[0]&(~1))+1))&0x1) << 1;
 941         }
 942         if (left_type[1]) {
 943             h->left_cbp |= ((h->cbp_table[left_xy[1]]>>((left_block[2]&(~1))+1))&0x1) << 3;
 944         }
 945     }
 946
 947 #if 1
 948     if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
 949         int list;
 950         for(list=0; list<h->list_count; list++){
 951             if(!USES_LIST(mb_type, list) && !IS_DIRECT(mb_type)){
 952                 /*if(!h->mv_cache_clean[list]){
 953                     memset(h->mv_cache [list],  0, 8*5*2*sizeof(int16_t)); //FIXME clean only input? clean at all?
 954                     memset(h->ref_cache[list], PART_NOT_AVAILABLE, 8*5*sizeof(int8_t));
 955                     h->mv_cache_clean[list]= 1;
 956                 }*/
 957                 continue;
 958             }
 959             h->mv_cache_clean[list]= 0;
 960
 961             if(USES_LIST(top_type, list)){
 962                 const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
 963                 const int b8_xy= h->mb2b8_xy[top_xy] + h->b8_stride;
 964                 AV_COPY128(h->mv_cache[list][scan8[0] + 0 - 1*8], s->current_picture.motion_val[list][b_xy + 0]);
 965                     h->ref_cache[list][scan8[0] + 0 - 1*8]=
 966                     h->ref_cache[list][scan8[0] + 1 - 1*8]= s->current_picture.ref_index[list][b8_xy + 0];
 967                     h->ref_cache[list][scan8[0] + 2 - 1*8]=
 968                     h->ref_cache[list][scan8[0] + 3 - 1*8]= s->current_picture.ref_index[list][b8_xy + 1];
 969             }else{
 970                 AV_ZERO128(h->mv_cache[list][scan8[0] + 0 - 1*8]);
 971                 *(uint32_t*)&h->ref_cache[list][scan8[0] + 0 - 1*8]= ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101;
 972             }
 973
 974             for(i=0; i<2; i++){
 975                 int cache_idx = scan8[0] - 1 + i*2*8;
 976                 if(USES_LIST(left_type[i], list)){
 977                     const int b_xy= h->mb2b_xy[left_xy[i]] + 3;
 978                     const int b8_xy= h->mb2b8_xy[left_xy[i]] + 1;
 979                     *(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]];
 980                     *(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]];
 981                         h->ref_cache[list][cache_idx  ]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[0+i*2]>>1)];
 982                         h->ref_cache[list][cache_idx+8]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[1+i*2]>>1)];
 983                 }else{
 984                     *(uint32_t*)h->mv_cache [list][cache_idx  ]=
 985                     *(uint32_t*)h->mv_cache [list][cache_idx+8]= 0;
 986                     h->ref_cache[list][cache_idx  ]=
 987                     h->ref_cache[list][cache_idx+8]= (left_type[i]) ? LIST_NOT_USED : PART_NOT_AVAILABLE;
 988                 }
 989             }
 990
 991             if((IS_DIRECT(mb_type) && !h->direct_spatial_mv_pred) && !FRAME_MBAFF)
 992                 continue;
 993
 994             if(USES_LIST(topleft_type, list)){
 995                 const int b_xy = h->mb2b_xy[topleft_xy] + 3 + h->b_stride + (topleft_partition & 2*h->b_stride);
 996                 const int b8_xy= h->mb2b8_xy[topleft_xy] + 1 + (topleft_partition & h->b8_stride);
 997                 *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
 998                 h->ref_cache[list][scan8[0] - 1 - 1*8]= s->current_picture.ref_index[list][b8_xy];
 999             }else{
1000                 *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= 0;
1001                 h->ref_cache[list][scan8[0] - 1 - 1*8]= topleft_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
1002             }
1003
1004             if(USES_LIST(topright_type, list)){
1005                 const int b_xy= h->mb2b_xy[topright_xy] + 3*h->b_stride;
1006                 const int b8_xy= h->mb2b8_xy[topright_xy] + h->b8_stride;
1007                 *(uint32_t*)h->mv_cache[list][scan8[0] + 4 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
1008                 h->ref_cache[list][scan8[0] + 4 - 1*8]= s->current_picture.ref_index[list][b8_xy];
1009             }else{
1010                 *(uint32_t*)h->mv_cache [list][scan8[0] + 4 - 1*8]= 0;
1011                 h->ref_cache[list][scan8[0] + 4 - 1*8]= topright_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
1012             }
1013
1014             if((IS_SKIP(mb_type) || IS_DIRECT(mb_type)) && !FRAME_MBAFF)
1015                 continue;
1016
1017             h->ref_cache[list][scan8[5 ]+1] =
1018             h->ref_cache[list][scan8[7 ]+1] =
1019             h->ref_cache[list][scan8[13]+1] =  //FIXME remove past 3 (init somewhere else)
1020             h->ref_cache[list][scan8[4 ]] =
1021             h->ref_cache[list][scan8[12]] = PART_NOT_AVAILABLE;
1022             *(uint32_t*)h->mv_cache [list][scan8[5 ]+1]=
1023             *(uint32_t*)h->mv_cache [list][scan8[7 ]+1]=
1024             *(uint32_t*)h->mv_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
1025             *(uint32_t*)h->mv_cache [list][scan8[4 ]]=
1026             *(uint32_t*)h->mv_cache [list][scan8[12]]= 0;
1027
1028             if( CABAC ) {
1029                 /* XXX beurk, Load mvd */
1030                 if(USES_LIST(top_type, list)){
1031                     const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
1032                     AV_COPY128(h->mvd_cache[list][scan8[0] + 0 - 1*8], h->mvd_table[list][b_xy + 0]);
1033                 }else{
1034                     AV_ZERO128(h->mvd_cache[list][scan8[0] + 0 - 1*8]);
1035                 }
1036                 if(USES_LIST(left_type[0], list)){
1037                     const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
1038                     *(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]];
1039                     *(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]];
1040                 }else{
1041                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 0*8]=
1042                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 1*8]= 0;
1043                 }
1044                 if(USES_LIST(left_type[1], list)){
1045                     const int b_xy= h->mb2b_xy[left_xy[1]] + 3;
1046                     *(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]];
1047                     *(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]];
1048                 }else{
1049                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 2*8]=
1050                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 3*8]= 0;
1051                 }
1052                 *(uint32_t*)h->mvd_cache [list][scan8[5 ]+1]=
1053                 *(uint32_t*)h->mvd_cache [list][scan8[7 ]+1]=
1054                 *(uint32_t*)h->mvd_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
1055                 *(uint32_t*)h->mvd_cache [list][scan8[4 ]]=
1056                 *(uint32_t*)h->mvd_cache [list][scan8[12]]= 0;
1057
1058                 if(h->slice_type_nos == FF_B_TYPE){
1059                     fill_rectangle(&h->direct_cache[scan8[0]], 4, 4, 8, 0, 1);
1060
1061                     if(IS_DIRECT(top_type)){
1062                         *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0x01010101;
1063                     }else if(IS_8X8(top_type)){
1064                         int b8_xy = h->mb2b8_xy[top_xy] + h->b8_stride;
1065                         h->direct_cache[scan8[0] + 0 - 1*8]= h->direct_table[b8_xy];
1066                         h->direct_cache[scan8[0] + 2 - 1*8]= h->direct_table[b8_xy + 1];
1067                     }else{
1068                         *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0;
1069                     }
1070
1071                     if(IS_DIRECT(left_type[0]))
1072                         h->direct_cache[scan8[0] - 1 + 0*8]= 1;
1073                     else if(IS_8X8(left_type[0]))
1074                         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)];
1075                     else
1076                         h->direct_cache[scan8[0] - 1 + 0*8]= 0;
1077
1078                     if(IS_DIRECT(left_type[1]))
1079                         h->direct_cache[scan8[0] - 1 + 2*8]= 1;
1080                     else if(IS_8X8(left_type[1]))
1081                         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)];
1082                     else
1083                         h->direct_cache[scan8[0] - 1 + 2*8]= 0;
1084                 }
1085             }
1086
1087             if(FRAME_MBAFF){
1088 #define MAP_MVS\
1089                     MAP_F2F(scan8[0] - 1 - 1*8, topleft_type)\
1090                     MAP_F2F(scan8[0] + 0 - 1*8, top_type)\
1091                     MAP_F2F(scan8[0] + 1 - 1*8, top_type)\
1092                     MAP_F2F(scan8[0] + 2 - 1*8, top_type)\
1093                     MAP_F2F(scan8[0] + 3 - 1*8, top_type)\
1094                     MAP_F2F(scan8[0] + 4 - 1*8, topright_type)\
1095                     MAP_F2F(scan8[0] - 1 + 0*8, left_type[0])\
1096                     MAP_F2F(scan8[0] - 1 + 1*8, left_type[0])\
1097                     MAP_F2F(scan8[0] - 1 + 2*8, left_type[1])\
1098                     MAP_F2F(scan8[0] - 1 + 3*8, left_type[1])
1099                 if(MB_FIELD){
1100 #define MAP_F2F(idx, mb_type)\
1101                     if(!IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
1102                         h->ref_cache[list][idx] <<= 1;\
1103                         h->mv_cache[list][idx][1] /= 2;\
1104                         h->mvd_cache[list][idx][1] /= 2;\
1105                     }
1106                     MAP_MVS
1107 #undef MAP_F2F
1108                 }else{
1109 #define MAP_F2F(idx, mb_type)\
1110                     if(IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
1111                         h->ref_cache[list][idx] >>= 1;\
1112                         h->mv_cache[list][idx][1] <<= 1;\
1113                         h->mvd_cache[list][idx][1] <<= 1;\
1114                     }
1115                     MAP_MVS
1116 #undef MAP_F2F
1117                 }
1118             }
1119         }
1120     }
1121 #endif
1122
1123         h->neighbor_transform_size= !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[0]);
1124 }
1125
1126 /**
1127  *
1128  * @returns non zero if the loop filter can be skiped
1129  */
1130 static int fill_filter_caches(H264Context *h, int mb_type){
1131     MpegEncContext * const s = &h->s;
1132     const int mb_xy= h->mb_xy;
1133     int top_xy, left_xy[2];
1134     int top_type, left_type[2];
1135     int i;
1136
1137     top_xy     = mb_xy  - (s->mb_stride << MB_FIELD);
1138
1139     //FIXME deblocking could skip the intra and nnz parts.
1140
1141     /* Wow, what a mess, why didn't they simplify the interlacing & intra
1142      * stuff, I can't imagine that these complex rules are worth it. */
1143
1144     left_xy[1] = left_xy[0] = mb_xy-1;
1145     if(FRAME_MBAFF){
1146         const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.mb_type[mb_xy-1]);
1147         const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
1148         if(s->mb_y&1){
1149             if (left_mb_field_flag != curr_mb_field_flag) {
1150                 left_xy[0] -= s->mb_stride;
1151             }
1152         }else{
1153             if(curr_mb_field_flag){
1154                 top_xy      += s->mb_stride & (((s->current_picture.mb_type[top_xy    ]>>7)&1)-1);
1155             }
1156             if (left_mb_field_flag != curr_mb_field_flag) {
1157                 left_xy[1] += s->mb_stride;
1158             }
1159         }
1160     }
1161
1162     h->top_mb_xy = top_xy;
1163     h->left_mb_xy[0] = left_xy[0];
1164     h->left_mb_xy[1] = left_xy[1];
1165     {
1166         //for sufficiently low qp, filtering wouldn't do anything
1167         //this is a conservative estimate: could also check beta_offset and more accurate chroma_qp
1168         int qp_thresh = h->qp_thresh; //FIXME strictly we should store qp_thresh for each mb of a slice
1169         int qp = s->current_picture.qscale_table[mb_xy];
1170         if(qp <= qp_thresh
1171            && (left_xy[0]<0 || ((qp + s->current_picture.qscale_table[left_xy[0]] + 1)>>1) <= qp_thresh)
1172            && (top_xy   < 0 || ((qp + s->current_picture.qscale_table[top_xy    ] + 1)>>1) <= qp_thresh)){
1173             if(!FRAME_MBAFF)
1174                 return 1;
1175             if(   (left_xy[0]< 0            || ((qp + s->current_picture.qscale_table[left_xy[1]             ] + 1)>>1) <= qp_thresh)
1176                && (top_xy    < s->mb_stride || ((qp + s->current_picture.qscale_table[top_xy    -s->mb_stride] + 1)>>1) <= qp_thresh))
1177                 return 1;
1178         }
1179     }
1180
1181     if(h->deblocking_filter == 2){
1182         h->top_type    = top_type     = h->slice_table[top_xy     ] == h->slice_num ? s->current_picture.mb_type[top_xy]     : 0;
1183         h->left_type[0]= left_type[0] = h->slice_table[left_xy[0] ] == h->slice_num ? s->current_picture.mb_type[left_xy[0]] : 0;
1184         h->left_type[1]= left_type[1] = h->slice_table[left_xy[1] ] == h->slice_num ? s->current_picture.mb_type[left_xy[1]] : 0;
1185     }else{
1186         h->top_type    = top_type     = h->slice_table[top_xy     ] < 0xFFFF ? s->current_picture.mb_type[top_xy]     : 0;
1187         h->left_type[0]= left_type[0] = h->slice_table[left_xy[0] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[0]] : 0;
1188         h->left_type[1]= left_type[1] = h->slice_table[left_xy[1] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[1]] : 0;
1189     }
1190     if(IS_INTRA(mb_type))
1191         return 0;
1192
1193     AV_COPY64(&h->non_zero_count_cache[0+8*1], &h->non_zero_count[mb_xy][ 0]);
1194     AV_COPY64(&h->non_zero_count_cache[0+8*2], &h->non_zero_count[mb_xy][ 8]);
1195     *((uint32_t*)&h->non_zero_count_cache[0+8*5])= *((uint32_t*)&h->non_zero_count[mb_xy][16]);
1196     *((uint32_t*)&h->non_zero_count_cache[4+8*3])= *((uint32_t*)&h->non_zero_count[mb_xy][20]);
1197     AV_COPY64(&h->non_zero_count_cache[0+8*4], &h->non_zero_count[mb_xy][24]);
1198
1199     h->cbp= h->cbp_table[mb_xy];
1200
1201     {
1202         int list;
1203         for(list=0; list<h->list_count; list++){
1204             int8_t *ref;
1205             int y, b_stride;
1206             int16_t (*mv_dst)[2];
1207             int16_t (*mv_src)[2];
1208
1209             if(!USES_LIST(mb_type, list)){
1210                 fill_rectangle(  h->mv_cache[list][scan8[0]], 4, 4, 8, pack16to32(0,0), 4);
1211                 *(uint32_t*)&h->ref_cache[list][scan8[ 0]] =
1212                 *(uint32_t*)&h->ref_cache[list][scan8[ 2]] =
1213                 *(uint32_t*)&h->ref_cache[list][scan8[ 8]] =
1214                 *(uint32_t*)&h->ref_cache[list][scan8[10]] = ((LIST_NOT_USED)&0xFF)*0x01010101;
1215                 continue;
1216             }
1217
1218             ref = &s->current_picture.ref_index[list][h->mb2b8_xy[mb_xy]];
1219             {
1220                 int (*ref2frm)[64] = h->ref2frm[ h->slice_num&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
1221                 *(uint32_t*)&h->ref_cache[list][scan8[ 0]] =
1222                 *(uint32_t*)&h->ref_cache[list][scan8[ 2]] = (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101;
1223                 ref += h->b8_stride;
1224                 *(uint32_t*)&h->ref_cache[list][scan8[ 8]] =
1225                 *(uint32_t*)&h->ref_cache[list][scan8[10]] = (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101;
1226             }
1227
1228             b_stride = h->b_stride;
1229             mv_dst   = &h->mv_cache[list][scan8[0]];
1230             mv_src   = &s->current_picture.motion_val[list][4*s->mb_x + 4*s->mb_y*b_stride];
1231             for(y=0; y<4; y++){
1232                 AV_COPY128(mv_dst + 8*y, mv_src + y*b_stride);
1233             }
1234
1235         }
1236     }
1237
1238
1239 /*
1240 0 . T T. T T T T
1241 1 L . .L . . . .
1242 2 L . .L . . . .
1243 3 . T TL . . . .
1244 4 L . .L . . . .
1245 5 L . .. . . . .
1246 */
1247 //FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
1248     if(top_type){
1249         *(uint32_t*)&h->non_zero_count_cache[4+8*0]= *(uint32_t*)&h->non_zero_count[top_xy][4+3*8];
1250     }
1251
1252     if(left_type[0]){
1253         h->non_zero_count_cache[3+8*1]= h->non_zero_count[left_xy[0]][7+0*8];
1254         h->non_zero_count_cache[3+8*2]= h->non_zero_count[left_xy[0]][7+1*8];
1255         h->non_zero_count_cache[3+8*3]= h->non_zero_count[left_xy[0]][7+2*8];
1256         h->non_zero_count_cache[3+8*4]= h->non_zero_count[left_xy[0]][7+3*8];
1257     }
1258
1259     // CAVLC 8x8dct requires NNZ values for residual decoding that differ from what the loop filter needs
1260     if(!CABAC && h->pps.transform_8x8_mode){
1261         if(IS_8x8DCT(top_type)){
1262             h->non_zero_count_cache[4+8*0]=
1263             h->non_zero_count_cache[5+8*0]= h->cbp_table[top_xy] & 4;
1264             h->non_zero_count_cache[6+8*0]=
1265             h->non_zero_count_cache[7+8*0]= h->cbp_table[top_xy] & 8;
1266         }
1267         if(IS_8x8DCT(left_type[0])){
1268             h->non_zero_count_cache[3+8*1]=
1269             h->non_zero_count_cache[3+8*2]= h->cbp_table[left_xy[0]]&2; //FIXME check MBAFF
1270         }
1271         if(IS_8x8DCT(left_type[1])){
1272             h->non_zero_count_cache[3+8*3]=
1273             h->non_zero_count_cache[3+8*4]= h->cbp_table[left_xy[1]]&8; //FIXME check MBAFF
1274         }
1275
1276         if(IS_8x8DCT(mb_type)){
1277             h->non_zero_count_cache[scan8[0   ]]= h->non_zero_count_cache[scan8[1   ]]=
1278             h->non_zero_count_cache[scan8[2   ]]= h->non_zero_count_cache[scan8[3   ]]= h->cbp & 1;
1279
1280             h->non_zero_count_cache[scan8[0+ 4]]= h->non_zero_count_cache[scan8[1+ 4]]=
1281             h->non_zero_count_cache[scan8[2+ 4]]= h->non_zero_count_cache[scan8[3+ 4]]= h->cbp & 2;
1282
1283             h->non_zero_count_cache[scan8[0+ 8]]= h->non_zero_count_cache[scan8[1+ 8]]=
1284             h->non_zero_count_cache[scan8[2+ 8]]= h->non_zero_count_cache[scan8[3+ 8]]= h->cbp & 4;
1285
1286             h->non_zero_count_cache[scan8[0+12]]= h->non_zero_count_cache[scan8[1+12]]=
1287             h->non_zero_count_cache[scan8[2+12]]= h->non_zero_count_cache[scan8[3+12]]= h->cbp & 8;
1288         }
1289     }
1290
1291     if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
1292         int list;
1293         for(list=0; list<h->list_count; list++){
1294             if(USES_LIST(top_type, list)){
1295                 const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
1296                 const int b8_xy= h->mb2b8_xy[top_xy] + h->b8_stride;
1297                 int (*ref2frm)[64] = h->ref2frm[ h->slice_table[top_xy]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
1298                 AV_COPY128(h->mv_cache[list][scan8[0] + 0 - 1*8], s->current_picture.motion_val[list][b_xy + 0]);
1299                 h->ref_cache[list][scan8[0] + 0 - 1*8]=
1300                 h->ref_cache[list][scan8[0] + 1 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 0]];
1301                 h->ref_cache[list][scan8[0] + 2 - 1*8]=
1302                 h->ref_cache[list][scan8[0] + 3 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 1]];
1303             }else{
1304                 AV_ZERO128(h->mv_cache[list][scan8[0] + 0 - 1*8]);
1305                 *(uint32_t*)&h->ref_cache[list][scan8[0] + 0 - 1*8]= ((LIST_NOT_USED)&0xFF)*0x01010101;
1306             }
1307
1308             if(!IS_INTERLACED(mb_type^left_type[0])){
1309                 if(USES_LIST(left_type[0], list)){
1310                     const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
1311                     const int b8_xy= h->mb2b8_xy[left_xy[0]] + 1;
1312                     int (*ref2frm)[64] = h->ref2frm[ h->slice_table[left_xy[0]]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
1313                     *(uint32_t*)h->mv_cache[list][scan8[0] - 1 + 0 ]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*0];
1314                     *(uint32_t*)h->mv_cache[list][scan8[0] - 1 + 8 ]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*1];
1315                     *(uint32_t*)h->mv_cache[list][scan8[0] - 1 +16 ]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*2];
1316                     *(uint32_t*)h->mv_cache[list][scan8[0] - 1 +24 ]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*3];
1317                     h->ref_cache[list][scan8[0] - 1 + 0 ]=
1318                     h->ref_cache[list][scan8[0] - 1 + 8 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + h->b8_stride*0]];
1319                     h->ref_cache[list][scan8[0] - 1 +16 ]=
1320                     h->ref_cache[list][scan8[0] - 1 +24 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + h->b8_stride*1]];
1321                 }else{
1322                     *(uint32_t*)h->mv_cache [list][scan8[0] - 1 + 0 ]=
1323                     *(uint32_t*)h->mv_cache [list][scan8[0] - 1 + 8 ]=
1324                     *(uint32_t*)h->mv_cache [list][scan8[0] - 1 +16 ]=
1325                     *(uint32_t*)h->mv_cache [list][scan8[0] - 1 +24 ]= 0;
1326                     h->ref_cache[list][scan8[0] - 1 + 0  ]=
1327                     h->ref_cache[list][scan8[0] - 1 + 8  ]=
1328                     h->ref_cache[list][scan8[0] - 1 + 16 ]=
1329                     h->ref_cache[list][scan8[0] - 1 + 24 ]= LIST_NOT_USED;
1330                 }
1331             }
1332         }
1333     }
1334
1335     return 0;
1336 }
1337
1338 /**
1339  * gets the predicted intra4x4 prediction mode.
1340  */
1341 static inline int pred_intra_mode(H264Context *h, int n){
1342     const int index8= scan8[n];
1343     const int left= h->intra4x4_pred_mode_cache[index8 - 1];
1344     const int top = h->intra4x4_pred_mode_cache[index8 - 8];
1345     const int min= FFMIN(left, top);
1346
1347     tprintf(h->s.avctx, "mode:%d %d min:%d\n", left ,top, min);
1348
1349     if(min<0) return DC_PRED;
1350     else      return min;
1351 }
1352
1353 static inline void write_back_non_zero_count(H264Context *h){
1354     const int mb_xy= h->mb_xy;
1355
1356     AV_COPY64(&h->non_zero_count[mb_xy][ 0], &h->non_zero_count_cache[0+8*1]);
1357     AV_COPY64(&h->non_zero_count[mb_xy][ 8], &h->non_zero_count_cache[0+8*2]);
1358     *((uint32_t*)&h->non_zero_count[mb_xy][16]) = *((uint32_t*)&h->non_zero_count_cache[0+8*5]);
1359     *((uint32_t*)&h->non_zero_count[mb_xy][20]) = *((uint32_t*)&h->non_zero_count_cache[4+8*3]);
1360     AV_COPY64(&h->non_zero_count[mb_xy][24], &h->non_zero_count_cache[0+8*4]);
1361 }
1362
1363 static inline void write_back_motion(H264Context *h, int mb_type){
1364     MpegEncContext * const s = &h->s;
1365     const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
1366     const int b8_xy= 2*s->mb_x + 2*s->mb_y*h->b8_stride;
1367     int list;
1368
1369     if(!USES_LIST(mb_type, 0))
1370         fill_rectangle(&s->current_picture.ref_index[0][b8_xy], 2, 2, h->b8_stride, (uint8_t)LIST_NOT_USED, 1);
1371
1372     for(list=0; list<h->list_count; list++){
1373         int y, b_stride;
1374         int16_t (*mv_dst)[2];
1375         int16_t (*mv_src)[2];
1376
1377         if(!USES_LIST(mb_type, list))
1378             continue;
1379
1380         b_stride = h->b_stride;
1381         mv_dst   = &s->current_picture.motion_val[list][b_xy];
1382         mv_src   = &h->mv_cache[list][scan8[0]];
1383         for(y=0; y<4; y++){
1384             AV_COPY128(mv_dst + y*b_stride, mv_src + 8*y);
1385         }
1386         if( CABAC ) {
1387             int16_t (*mvd_dst)[2] = &h->mvd_table[list][b_xy];
1388             int16_t (*mvd_src)[2] = &h->mvd_cache[list][scan8[0]];
1389             if(IS_SKIP(mb_type))
1390                 fill_rectangle(mvd_dst, 4, 4, h->b_stride, 0, 4);
1391             else
1392             for(y=0; y<4; y++){
1393                 AV_COPY128(mvd_dst + y*b_stride, mvd_src + 8*y);
1394             }
1395         }
1396
1397         {
1398             int8_t *ref_index = &s->current_picture.ref_index[list][b8_xy];
1399             ref_index[0+0*h->b8_stride]= h->ref_cache[list][scan8[0]];
1400             ref_index[1+0*h->b8_stride]= h->ref_cache[list][scan8[4]];
1401             ref_index[0+1*h->b8_stride]= h->ref_cache[list][scan8[8]];
1402             ref_index[1+1*h->b8_stride]= h->ref_cache[list][scan8[12]];
1403         }
1404     }
1405
1406     if(h->slice_type_nos == FF_B_TYPE && CABAC){
1407         if(IS_8X8(mb_type)){
1408             uint8_t *direct_table = &h->direct_table[b8_xy];
1409             direct_table[1+0*h->b8_stride] = IS_DIRECT(h->sub_mb_type[1]) ? 1 : 0;
1410             direct_table[0+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[2]) ? 1 : 0;
1411             direct_table[1+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[3]) ? 1 : 0;
1412         }
1413     }
1414 }
1415
1416 static inline int get_dct8x8_allowed(H264Context *h){
1417     if(h->sps.direct_8x8_inference_flag)
1418         return !(*(uint64_t*)h->sub_mb_type & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8                )*0x0001000100010001ULL));
1419     else
1420         return !(*(uint64_t*)h->sub_mb_type & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8|MB_TYPE_DIRECT2)*0x0001000100010001ULL));
1421 }
1422
1423 static void predict_field_decoding_flag(H264Context *h){
1424     MpegEncContext * const s = &h->s;
1425     const int mb_xy= h->mb_xy;
1426     int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
1427                 ? s->current_picture.mb_type[mb_xy-1]
1428                 : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
1429                 ? s->current_picture.mb_type[mb_xy-s->mb_stride]
1430                 : 0;
1431     h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
1432 }
1433
1434 /**
1435  * decodes a P_SKIP or B_SKIP macroblock
1436  */
1437 static void decode_mb_skip(H264Context *h){
1438     MpegEncContext * const s = &h->s;
1439     const int mb_xy= h->mb_xy;
1440     int mb_type=0;
1441
1442     memset(h->non_zero_count[mb_xy], 0, 32);
1443     memset(h->non_zero_count_cache + 8, 0, 8*5); //FIXME ugly, remove pfui
1444
1445     if(MB_FIELD)
1446         mb_type|= MB_TYPE_INTERLACED;
1447
1448     if( h->slice_type_nos == FF_B_TYPE )
1449     {
1450         // just for fill_caches. pred_direct_motion will set the real mb_type
1451         mb_type|= MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2|MB_TYPE_SKIP;
1452
1453         fill_decode_caches(h, mb_type); //FIXME check what is needed and what not ...
1454         ff_h264_pred_direct_motion(h, &mb_type);
1455         mb_type|= MB_TYPE_SKIP;
1456     }
1457     else
1458     {
1459         int mx, my;
1460         mb_type|= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P1L0|MB_TYPE_SKIP;
1461
1462         fill_decode_caches(h, mb_type); //FIXME check what is needed and what not ...
1463         pred_pskip_motion(h, &mx, &my);
1464         fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, 0, 1);
1465         fill_rectangle(  h->mv_cache[0][scan8[0]], 4, 4, 8, pack16to32(mx,my), 4);
1466     }
1467
1468     write_back_motion(h, mb_type);
1469     s->current_picture.mb_type[mb_xy]= mb_type;
1470     s->current_picture.qscale_table[mb_xy]= s->qscale;
1471     h->slice_table[ mb_xy ]= h->slice_num;
1472     h->prev_mb_skipped= 1;
1473 }
1474
1475 #include "h264_mvpred.h" //For pred_pskip_motion()
1476
1477 #endif /* AVCODEC_H264_H */