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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 col_parity;
 427     int col_fieldoff;
 428     int dist_scale_factor[16];
 429     int dist_scale_factor_field[2][32];
 430     int map_col_to_list0[2][16+32];
 431     int map_col_to_list0_field[2][2][16+32];
 432
 433     /**
 434      * num_ref_idx_l0/1_active_minus1 + 1
 435      */
 436     unsigned int ref_count[2];   ///< counts frames or fields, depending on current mb mode
 437     unsigned int list_count;
 438     uint8_t *list_counts;            ///< Array of list_count per MB specifying the slice type
 439     Picture *short_ref[32];
 440     Picture *long_ref[32];
 441     Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
 442     Picture ref_list[2][48];         /**< 0..15: frame refs, 16..47: mbaff field refs.
 443                                           Reordered version of default_ref_list
 444                                           according to picture reordering in slice header */
 445     int ref2frm[MAX_SLICES][2][64];  ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
 446     Picture *delayed_pic[MAX_DELAYED_PIC_COUNT+2]; //FIXME size?
 447     int outputed_poc;
 448
 449     /**
 450      * memory management control operations buffer.
 451      */
 452     MMCO mmco[MAX_MMCO_COUNT];
 453     int mmco_index;
 454
 455     int long_ref_count;  ///< number of actual long term references
 456     int short_ref_count; ///< number of actual short term references
 457
 458     //data partitioning
 459     GetBitContext intra_gb;
 460     GetBitContext inter_gb;
 461     GetBitContext *intra_gb_ptr;
 462     GetBitContext *inter_gb_ptr;
 463
 464     DECLARE_ALIGNED_16(DCTELEM, mb)[16*24];
 465     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
 466
 467     /**
 468      * Cabac
 469      */
 470     CABACContext cabac;
 471     uint8_t      cabac_state[460];
 472     int          cabac_init_idc;
 473
 474     /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0,1,2), 0x0? luma_cbp */
 475     uint16_t     *cbp_table;
 476     int cbp;
 477     int top_cbp;
 478     int left_cbp;
 479     /* chroma_pred_mode for i4x4 or i16x16, else 0 */
 480     uint8_t     *chroma_pred_mode_table;
 481     int         last_qscale_diff;
 482     int16_t     (*mvd_table[2])[2];
 483     DECLARE_ALIGNED_16(int16_t, mvd_cache)[2][5*8][2];
 484     uint8_t     *direct_table;
 485     uint8_t     direct_cache[5*8];
 486
 487     uint8_t zigzag_scan[16];
 488     uint8_t zigzag_scan8x8[64];
 489     uint8_t zigzag_scan8x8_cavlc[64];
 490     uint8_t field_scan[16];
 491     uint8_t field_scan8x8[64];
 492     uint8_t field_scan8x8_cavlc[64];
 493     const uint8_t *zigzag_scan_q0;
 494     const uint8_t *zigzag_scan8x8_q0;
 495     const uint8_t *zigzag_scan8x8_cavlc_q0;
 496     const uint8_t *field_scan_q0;
 497     const uint8_t *field_scan8x8_q0;
 498     const uint8_t *field_scan8x8_cavlc_q0;
 499
 500     int x264_build;
 501
 502     /**
 503      * @defgroup multithreading Members for slice based multithreading
 504      * @{
 505      */
 506     struct H264Context *thread_context[MAX_THREADS];
 507
 508     /**
 509      * current slice number, used to initalize slice_num of each thread/context
 510      */
 511     int current_slice;
 512
 513     /**
 514      * Max number of threads / contexts.
 515      * This is equal to AVCodecContext.thread_count unless
 516      * multithreaded decoding is impossible, in which case it is
 517      * reduced to 1.
 518      */
 519     int max_contexts;
 520
 521     /**
 522      *  1 if the single thread fallback warning has already been
 523      *  displayed, 0 otherwise.
 524      */
 525     int single_decode_warning;
 526
 527     int last_slice_type;
 528     /** @} */
 529
 530     int mb_xy;
 531
 532     uint32_t svq3_watermark_key;
 533
 534     /**
 535      * pic_struct in picture timing SEI message
 536      */
 537     SEI_PicStructType sei_pic_struct;
 538
 539     /**
 540      * Complement sei_pic_struct
 541      * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
 542      * However, soft telecined frames may have these values.
 543      * This is used in an attempt to flag soft telecine progressive.
 544      */
 545     int prev_interlaced_frame;
 546
 547     /**
 548      * Bit set of clock types for fields/frames in picture timing SEI message.
 549      * For each found ct_type, appropriate bit is set (e.g., bit 1 for
 550      * interlaced).
 551      */
 552     int sei_ct_type;
 553
 554     /**
 555      * dpb_output_delay in picture timing SEI message, see H.264 C.2.2
 556      */
 557     int sei_dpb_output_delay;
 558
 559     /**
 560      * cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
 561      */
 562     int sei_cpb_removal_delay;
 563
 564     /**
 565      * recovery_frame_cnt from SEI message
 566      *
 567      * Set to -1 if no recovery point SEI message found or to number of frames
 568      * before playback synchronizes. Frames having recovery point are key
 569      * frames.
 570      */
 571     int sei_recovery_frame_cnt;
 572
 573     int is_complex;
 574
 575     int luma_weight_flag[2];   ///< 7.4.3.2 luma_weight_lX_flag
 576     int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
 577
 578     // Timestamp stuff
 579     int sei_buffering_period_present;  ///< Buffering period SEI flag
 580     int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
 581 }H264Context;
 582
 583
 584 extern const uint8_t ff_h264_chroma_qp[52];
 585
 586 void ff_svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp);
 587
 588 void ff_svq3_add_idct_c(uint8_t *dst, DCTELEM *block, int stride, int qp, int dc);
 589
 590 /**
 591  * Decode SEI
 592  */
 593 int ff_h264_decode_sei(H264Context *h);
 594
 595 /**
 596  * Decode SPS
 597  */
 598 int ff_h264_decode_seq_parameter_set(H264Context *h);
 599
 600 /**
 601  * Decode PPS
 602  */
 603 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length);
 604
 605 /**
 606  * Decodes a network abstraction layer unit.
 607  * @param consumed is the number of bytes used as input
 608  * @param length is the length of the array
 609  * @param dst_length is the number of decoded bytes FIXME here or a decode rbsp tailing?
 610  * @returns decoded bytes, might be src+1 if no escapes
 611  */
 612 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length);
 613
 614 /**
 615  * identifies the exact end of the bitstream
 616  * @return the length of the trailing, or 0 if damaged
 617  */
 618 int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src);
 619
 620 /**
 621  * frees any data that may have been allocated in the H264 context like SPS, PPS etc.
 622  */
 623 av_cold void ff_h264_free_context(H264Context *h);
 624
 625 /**
 626  * reconstructs bitstream slice_type.
 627  */
 628 int ff_h264_get_slice_type(const H264Context *h);
 629
 630 /**
 631  * allocates tables.
 632  * needs width/height
 633  */
 634 int ff_h264_alloc_tables(H264Context *h);
 635
 636 /**
 637  * fills the default_ref_list.
 638  */
 639 int ff_h264_fill_default_ref_list(H264Context *h);
 640
 641 int ff_h264_decode_ref_pic_list_reordering(H264Context *h);
 642 void ff_h264_fill_mbaff_ref_list(H264Context *h);
 643 void ff_h264_remove_all_refs(H264Context *h);
 644
 645 /**
 646  * Executes the reference picture marking (memory management control operations).
 647  */
 648 int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count);
 649
 650 int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb);
 651
 652
 653 /**
 654  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 655  */
 656 int ff_h264_check_intra4x4_pred_mode(H264Context *h);
 657
 658 /**
 659  * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
 660  */
 661 int ff_h264_check_intra_pred_mode(H264Context *h, int mode);
 662
 663 void ff_h264_write_back_intra_pred_mode(H264Context *h);
 664 void ff_h264_hl_decode_mb(H264Context *h);
 665 int ff_h264_frame_start(H264Context *h);
 666 av_cold int ff_h264_decode_init(AVCodecContext *avctx);
 667 av_cold int ff_h264_decode_end(AVCodecContext *avctx);
 668 av_cold void ff_h264_decode_init_vlc(void);
 669
 670 /**
 671  * decodes a macroblock
 672  * @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
 673  */
 674 int ff_h264_decode_mb_cavlc(H264Context *h);
 675
 676 /**
 677  * decodes a CABAC coded macroblock
 678  * @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
 679  */
 680 int ff_h264_decode_mb_cabac(H264Context *h);
 681
 682 void ff_h264_init_cabac_states(H264Context *h);
 683
 684 void ff_h264_direct_dist_scale_factor(H264Context * const h);
 685 void ff_h264_direct_ref_list_init(H264Context * const h);
 686 void ff_h264_pred_direct_motion(H264Context * const h, int *mb_type);
 687
 688 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);
 689 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);
 690
 691 /**
 692  * Reset SEI values at the beginning of the frame.
 693  *
 694  * @param h H.264 context.
 695  */
 696 void ff_h264_reset_sei(H264Context *h);
 697
 698
 699 /*
 700 o-o o-o
 701  / / /
 702 o-o o-o
 703  ,---'
 704 o-o o-o
 705  / / /
 706 o-o o-o
 707 */
 708 //This table must be here because scan8[constant] must be known at compiletime
 709 static const uint8_t scan8[16 + 2*4]={
 710  4+1*8, 5+1*8, 4+2*8, 5+2*8,
 711  6+1*8, 7+1*8, 6+2*8, 7+2*8,
 712  4+3*8, 5+3*8, 4+4*8, 5+4*8,
 713  6+3*8, 7+3*8, 6+4*8, 7+4*8,
 714  1+1*8, 2+1*8,
 715  1+2*8, 2+2*8,
 716  1+4*8, 2+4*8,
 717  1+5*8, 2+5*8,
 718 };
 719
 720 static av_always_inline uint32_t pack16to32(int a, int b){
 721 #if HAVE_BIGENDIAN
 722    return (b&0xFFFF) + (a<<16);
 723 #else
 724    return (a&0xFFFF) + (b<<16);
 725 #endif
 726 }
 727
 728 /**
 729  * gets the chroma qp.
 730  */
 731 static inline int get_chroma_qp(H264Context *h, int t, int qscale){
 732     return h->pps.chroma_qp_table[t][qscale];
 733 }
 734
 735 static inline void pred_pskip_motion(H264Context * const h, int * const mx, int * const my);
 736
 737 static void fill_decode_caches(H264Context *h, int mb_type){
 738     MpegEncContext * const s = &h->s;
 739     const int mb_xy= h->mb_xy;
 740     int topleft_xy, top_xy, topright_xy, left_xy[2];
 741     int topleft_type, top_type, topright_type, left_type[2];
 742     const uint8_t * left_block;
 743     int topleft_partition= -1;
 744     int i;
 745     static const uint8_t left_block_options[4][16]={
 746         {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},
 747         {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},
 748         {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},
 749         {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}
 750     };
 751
 752     top_xy     = mb_xy  - (s->mb_stride << MB_FIELD);
 753
 754     /* Wow, what a mess, why didn't they simplify the interlacing & intra
 755      * stuff, I can't imagine that these complex rules are worth it. */
 756
 757     topleft_xy = top_xy - 1;
 758     topright_xy= top_xy + 1;
 759     left_xy[1] = left_xy[0] = mb_xy-1;
 760     left_block = left_block_options[0];
 761     if(FRAME_MBAFF){
 762         const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.mb_type[mb_xy-1]);
 763         const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
 764         if(s->mb_y&1){
 765             if (left_mb_field_flag != curr_mb_field_flag) {
 766                 left_xy[1] = left_xy[0] = mb_xy - s->mb_stride - 1;
 767                 if (curr_mb_field_flag) {
 768                     left_xy[1] += s->mb_stride;
 769                     left_block = left_block_options[3];
 770                 } else {
 771                     topleft_xy += s->mb_stride;
 772                     // take top left mv from the middle of the mb, as opposed to all other modes which use the bottom right partition
 773                     topleft_partition = 0;
 774                     left_block = left_block_options[1];
 775                 }
 776             }
 777         }else{
 778             if(curr_mb_field_flag){
 779                 topleft_xy  += s->mb_stride & (((s->current_picture.mb_type[top_xy - 1]>>7)&1)-1);
 780                 topright_xy += s->mb_stride & (((s->current_picture.mb_type[top_xy + 1]>>7)&1)-1);
 781                 top_xy      += s->mb_stride & (((s->current_picture.mb_type[top_xy    ]>>7)&1)-1);
 782             }
 783             if (left_mb_field_flag != curr_mb_field_flag) {
 784                 left_xy[1] = left_xy[0] = mb_xy - 1;
 785                 if (curr_mb_field_flag) {
 786                     left_xy[1] += s->mb_stride;
 787                     left_block = left_block_options[3];
 788                 } else {
 789                     left_block = left_block_options[2];
 790                 }
 791             }
 792         }
 793     }
 794
 795     h->top_mb_xy = top_xy;
 796     h->left_mb_xy[0] = left_xy[0];
 797     h->left_mb_xy[1] = left_xy[1];
 798         topleft_type = h->slice_table[topleft_xy ] == h->slice_num ? s->current_picture.mb_type[topleft_xy] : 0;
 799         top_type     = h->slice_table[top_xy     ] == h->slice_num ? s->current_picture.mb_type[top_xy]     : 0;
 800         topright_type= h->slice_table[topright_xy] == h->slice_num ? s->current_picture.mb_type[topright_xy]: 0;
 801         left_type[0] = h->slice_table[left_xy[0] ] == h->slice_num ? s->current_picture.mb_type[left_xy[0]] : 0;
 802         left_type[1] = h->slice_table[left_xy[1] ] == h->slice_num ? s->current_picture.mb_type[left_xy[1]] : 0;
 803
 804         if(IS_INTRA(mb_type)){
 805             int type_mask= h->pps.constrained_intra_pred ? IS_INTRA(-1) : -1;
 806             h->topleft_samples_available=
 807             h->top_samples_available=
 808             h->left_samples_available= 0xFFFF;
 809             h->topright_samples_available= 0xEEEA;
 810
 811             if(!(top_type & type_mask)){
 812                 h->topleft_samples_available= 0xB3FF;
 813                 h->top_samples_available= 0x33FF;
 814                 h->topright_samples_available= 0x26EA;
 815             }
 816             if(IS_INTERLACED(mb_type) != IS_INTERLACED(left_type[0])){
 817                 if(IS_INTERLACED(mb_type)){
 818                     if(!(left_type[0] & type_mask)){
 819                         h->topleft_samples_available&= 0xDFFF;
 820                         h->left_samples_available&= 0x5FFF;
 821                     }
 822                     if(!(left_type[1] & type_mask)){
 823                         h->topleft_samples_available&= 0xFF5F;
 824                         h->left_samples_available&= 0xFF5F;
 825                     }
 826                 }else{
 827                     int left_typei = h->slice_table[left_xy[0] + s->mb_stride ] == h->slice_num
 828                                     ? s->current_picture.mb_type[left_xy[0] + s->mb_stride] : 0;
 829                     assert(left_xy[0] == left_xy[1]);
 830                     if(!((left_typei & type_mask) && (left_type[0] & type_mask))){
 831                         h->topleft_samples_available&= 0xDF5F;
 832                         h->left_samples_available&= 0x5F5F;
 833                     }
 834                 }
 835             }else{
 836                 if(!(left_type[0] & type_mask)){
 837                     h->topleft_samples_available&= 0xDF5F;
 838                     h->left_samples_available&= 0x5F5F;
 839                 }
 840             }
 841
 842             if(!(topleft_type & type_mask))
 843                 h->topleft_samples_available&= 0x7FFF;
 844
 845             if(!(topright_type & type_mask))
 846                 h->topright_samples_available&= 0xFBFF;
 847
 848             if(IS_INTRA4x4(mb_type)){
 849                 if(IS_INTRA4x4(top_type)){
 850                     h->intra4x4_pred_mode_cache[4+8*0]= h->intra4x4_pred_mode[top_xy][4];
 851                     h->intra4x4_pred_mode_cache[5+8*0]= h->intra4x4_pred_mode[top_xy][5];
 852                     h->intra4x4_pred_mode_cache[6+8*0]= h->intra4x4_pred_mode[top_xy][6];
 853                     h->intra4x4_pred_mode_cache[7+8*0]= h->intra4x4_pred_mode[top_xy][3];
 854                 }else{
 855                     int pred;
 856                     if(!(top_type & type_mask))
 857                         pred= -1;
 858                     else{
 859                         pred= 2;
 860                     }
 861                     h->intra4x4_pred_mode_cache[4+8*0]=
 862                     h->intra4x4_pred_mode_cache[5+8*0]=
 863                     h->intra4x4_pred_mode_cache[6+8*0]=
 864                     h->intra4x4_pred_mode_cache[7+8*0]= pred;
 865                 }
 866                 for(i=0; i<2; i++){
 867                     if(IS_INTRA4x4(left_type[i])){
 868                         h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[0+2*i]];
 869                         h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= h->intra4x4_pred_mode[left_xy[i]][left_block[1+2*i]];
 870                     }else{
 871                         int pred;
 872                         if(!(left_type[i] & type_mask))
 873                             pred= -1;
 874                         else{
 875                             pred= 2;
 876                         }
 877                         h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]=
 878                         h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= pred;
 879                     }
 880                 }
 881             }
 882         }
 883
 884
 885 /*
 886 0 . T T. T T T T
 887 1 L . .L . . . .
 888 2 L . .L . . . .
 889 3 . T TL . . . .
 890 4 L . .L . . . .
 891 5 L . .. . . . .
 892 */
 893 //FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
 894     if(top_type){
 895         *(uint32_t*)&h->non_zero_count_cache[4+8*0]= *(uint32_t*)&h->non_zero_count[top_xy][4+3*8];
 896             h->non_zero_count_cache[1+8*0]= h->non_zero_count[top_xy][1+1*8];
 897             h->non_zero_count_cache[2+8*0]= h->non_zero_count[top_xy][2+1*8];
 898
 899             h->non_zero_count_cache[1+8*3]= h->non_zero_count[top_xy][1+2*8];
 900             h->non_zero_count_cache[2+8*3]= h->non_zero_count[top_xy][2+2*8];
 901     }else {
 902             h->non_zero_count_cache[1+8*0]=
 903             h->non_zero_count_cache[2+8*0]=
 904
 905             h->non_zero_count_cache[1+8*3]=
 906             h->non_zero_count_cache[2+8*3]=
 907             *(uint32_t*)&h->non_zero_count_cache[4+8*0]= CABAC && !IS_INTRA(mb_type) ? 0 : 0x40404040;
 908     }
 909
 910     for (i=0; i<2; i++) {
 911         if(left_type[i]){
 912             h->non_zero_count_cache[3+8*1 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[8+0+2*i]];
 913             h->non_zero_count_cache[3+8*2 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[8+1+2*i]];
 914                 h->non_zero_count_cache[0+8*1 +   8*i]= h->non_zero_count[left_xy[i]][left_block[8+4+2*i]];
 915                 h->non_zero_count_cache[0+8*4 +   8*i]= h->non_zero_count[left_xy[i]][left_block[8+5+2*i]];
 916         }else{
 917                 h->non_zero_count_cache[3+8*1 + 2*8*i]=
 918                 h->non_zero_count_cache[3+8*2 + 2*8*i]=
 919                 h->non_zero_count_cache[0+8*1 +   8*i]=
 920                 h->non_zero_count_cache[0+8*4 +   8*i]= CABAC && !IS_INTRA(mb_type) ? 0 : 64;
 921         }
 922     }
 923
 924     if( CABAC ) {
 925         // top_cbp
 926         if(top_type) {
 927             h->top_cbp = h->cbp_table[top_xy];
 928         } else if(IS_INTRA(mb_type)) {
 929             h->top_cbp = 0x1C0;
 930         } else {
 931             h->top_cbp = 0;
 932         }
 933         // left_cbp
 934         if (left_type[0]) {
 935             h->left_cbp = h->cbp_table[left_xy[0]] & 0x1f0;
 936         } else if(IS_INTRA(mb_type)) {
 937             h->left_cbp = 0x1C0;
 938         } else {
 939             h->left_cbp = 0;
 940         }
 941         if (left_type[0]) {
 942             h->left_cbp |= ((h->cbp_table[left_xy[0]]>>((left_block[0]&(~1))+1))&0x1) << 1;
 943         }
 944         if (left_type[1]) {
 945             h->left_cbp |= ((h->cbp_table[left_xy[1]]>>((left_block[2]&(~1))+1))&0x1) << 3;
 946         }
 947     }
 948
 949 #if 1
 950     if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
 951         int list;
 952         for(list=0; list<h->list_count; list++){
 953             if(!USES_LIST(mb_type, list) && !IS_DIRECT(mb_type)){
 954                 /*if(!h->mv_cache_clean[list]){
 955                     memset(h->mv_cache [list],  0, 8*5*2*sizeof(int16_t)); //FIXME clean only input? clean at all?
 956                     memset(h->ref_cache[list], PART_NOT_AVAILABLE, 8*5*sizeof(int8_t));
 957                     h->mv_cache_clean[list]= 1;
 958                 }*/
 959                 continue;
 960             }
 961             h->mv_cache_clean[list]= 0;
 962
 963             if(USES_LIST(top_type, list)){
 964                 const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
 965                 const int b8_xy= h->mb2b8_xy[top_xy] + h->b8_stride;
 966                 AV_COPY128(h->mv_cache[list][scan8[0] + 0 - 1*8], s->current_picture.motion_val[list][b_xy + 0]);
 967                     h->ref_cache[list][scan8[0] + 0 - 1*8]=
 968                     h->ref_cache[list][scan8[0] + 1 - 1*8]= s->current_picture.ref_index[list][b8_xy + 0];
 969                     h->ref_cache[list][scan8[0] + 2 - 1*8]=
 970                     h->ref_cache[list][scan8[0] + 3 - 1*8]= s->current_picture.ref_index[list][b8_xy + 1];
 971             }else{
 972                 AV_ZERO128(h->mv_cache[list][scan8[0] + 0 - 1*8]);
 973                 *(uint32_t*)&h->ref_cache[list][scan8[0] + 0 - 1*8]= ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101;
 974             }
 975
 976             for(i=0; i<2; i++){
 977                 int cache_idx = scan8[0] - 1 + i*2*8;
 978                 if(USES_LIST(left_type[i], list)){
 979                     const int b_xy= h->mb2b_xy[left_xy[i]] + 3;
 980                     const int b8_xy= h->mb2b8_xy[left_xy[i]] + 1;
 981                     *(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]];
 982                     *(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]];
 983                         h->ref_cache[list][cache_idx  ]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[0+i*2]>>1)];
 984                         h->ref_cache[list][cache_idx+8]= s->current_picture.ref_index[list][b8_xy + h->b8_stride*(left_block[1+i*2]>>1)];
 985                 }else{
 986                     *(uint32_t*)h->mv_cache [list][cache_idx  ]=
 987                     *(uint32_t*)h->mv_cache [list][cache_idx+8]= 0;
 988                     h->ref_cache[list][cache_idx  ]=
 989                     h->ref_cache[list][cache_idx+8]= (left_type[i]) ? LIST_NOT_USED : PART_NOT_AVAILABLE;
 990                 }
 991             }
 992
 993             if((IS_DIRECT(mb_type) && !h->direct_spatial_mv_pred))
 994                 continue;
 995
 996             if(USES_LIST(topleft_type, list)){
 997                 const int b_xy = h->mb2b_xy[topleft_xy] + 3 + h->b_stride + (topleft_partition & 2*h->b_stride);
 998                 const int b8_xy= h->mb2b8_xy[topleft_xy] + 1 + (topleft_partition & h->b8_stride);
 999                 *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
1000                 h->ref_cache[list][scan8[0] - 1 - 1*8]= s->current_picture.ref_index[list][b8_xy];
1001             }else{
1002                 *(uint32_t*)h->mv_cache[list][scan8[0] - 1 - 1*8]= 0;
1003                 h->ref_cache[list][scan8[0] - 1 - 1*8]= topleft_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
1004             }
1005
1006             if(USES_LIST(topright_type, list)){
1007                 const int b_xy= h->mb2b_xy[topright_xy] + 3*h->b_stride;
1008                 const int b8_xy= h->mb2b8_xy[topright_xy] + h->b8_stride;
1009                 *(uint32_t*)h->mv_cache[list][scan8[0] + 4 - 1*8]= *(uint32_t*)s->current_picture.motion_val[list][b_xy];
1010                 h->ref_cache[list][scan8[0] + 4 - 1*8]= s->current_picture.ref_index[list][b8_xy];
1011             }else{
1012                 *(uint32_t*)h->mv_cache [list][scan8[0] + 4 - 1*8]= 0;
1013                 h->ref_cache[list][scan8[0] + 4 - 1*8]= topright_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
1014             }
1015
1016             if((IS_SKIP(mb_type) || IS_DIRECT(mb_type)) && !FRAME_MBAFF)
1017                 continue;
1018
1019             h->ref_cache[list][scan8[5 ]+1] =
1020             h->ref_cache[list][scan8[7 ]+1] =
1021             h->ref_cache[list][scan8[13]+1] =  //FIXME remove past 3 (init somewhere else)
1022             h->ref_cache[list][scan8[4 ]] =
1023             h->ref_cache[list][scan8[12]] = PART_NOT_AVAILABLE;
1024             *(uint32_t*)h->mv_cache [list][scan8[5 ]+1]=
1025             *(uint32_t*)h->mv_cache [list][scan8[7 ]+1]=
1026             *(uint32_t*)h->mv_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
1027             *(uint32_t*)h->mv_cache [list][scan8[4 ]]=
1028             *(uint32_t*)h->mv_cache [list][scan8[12]]= 0;
1029
1030             if( CABAC ) {
1031                 /* XXX beurk, Load mvd */
1032                 if(USES_LIST(top_type, list)){
1033                     const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
1034                     AV_COPY128(h->mvd_cache[list][scan8[0] + 0 - 1*8], h->mvd_table[list][b_xy + 0]);
1035                 }else{
1036                     AV_ZERO128(h->mvd_cache[list][scan8[0] + 0 - 1*8]);
1037                 }
1038                 if(USES_LIST(left_type[0], list)){
1039                     const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
1040                     *(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]];
1041                     *(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]];
1042                 }else{
1043                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 0*8]=
1044                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 1*8]= 0;
1045                 }
1046                 if(USES_LIST(left_type[1], list)){
1047                     const int b_xy= h->mb2b_xy[left_xy[1]] + 3;
1048                     *(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]];
1049                     *(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]];
1050                 }else{
1051                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 2*8]=
1052                     *(uint32_t*)h->mvd_cache [list][scan8[0] - 1 + 3*8]= 0;
1053                 }
1054                 *(uint32_t*)h->mvd_cache [list][scan8[5 ]+1]=
1055                 *(uint32_t*)h->mvd_cache [list][scan8[7 ]+1]=
1056                 *(uint32_t*)h->mvd_cache [list][scan8[13]+1]= //FIXME remove past 3 (init somewhere else)
1057                 *(uint32_t*)h->mvd_cache [list][scan8[4 ]]=
1058                 *(uint32_t*)h->mvd_cache [list][scan8[12]]= 0;
1059
1060                 if(h->slice_type_nos == FF_B_TYPE){
1061                     fill_rectangle(&h->direct_cache[scan8[0]], 4, 4, 8, 0, 1);
1062
1063                     if(IS_DIRECT(top_type)){
1064                         *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0x01010101;
1065                     }else if(IS_8X8(top_type)){
1066                         int b8_xy = h->mb2b8_xy[top_xy] + h->b8_stride;
1067                         h->direct_cache[scan8[0] + 0 - 1*8]= h->direct_table[b8_xy];
1068                         h->direct_cache[scan8[0] + 2 - 1*8]= h->direct_table[b8_xy + 1];
1069                     }else{
1070                         *(uint32_t*)&h->direct_cache[scan8[0] - 1*8]= 0;
1071                     }
1072
1073                     if(IS_DIRECT(left_type[0]))
1074                         h->direct_cache[scan8[0] - 1 + 0*8]= 1;
1075                     else if(IS_8X8(left_type[0]))
1076                         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)];
1077                     else
1078                         h->direct_cache[scan8[0] - 1 + 0*8]= 0;
1079
1080                     if(IS_DIRECT(left_type[1]))
1081                         h->direct_cache[scan8[0] - 1 + 2*8]= 1;
1082                     else if(IS_8X8(left_type[1]))
1083                         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)];
1084                     else
1085                         h->direct_cache[scan8[0] - 1 + 2*8]= 0;
1086                 }
1087             }
1088
1089             if(FRAME_MBAFF){
1090 #define MAP_MVS\
1091                     MAP_F2F(scan8[0] - 1 - 1*8, topleft_type)\
1092                     MAP_F2F(scan8[0] + 0 - 1*8, top_type)\
1093                     MAP_F2F(scan8[0] + 1 - 1*8, top_type)\
1094                     MAP_F2F(scan8[0] + 2 - 1*8, top_type)\
1095                     MAP_F2F(scan8[0] + 3 - 1*8, top_type)\
1096                     MAP_F2F(scan8[0] + 4 - 1*8, topright_type)\
1097                     MAP_F2F(scan8[0] - 1 + 0*8, left_type[0])\
1098                     MAP_F2F(scan8[0] - 1 + 1*8, left_type[0])\
1099                     MAP_F2F(scan8[0] - 1 + 2*8, left_type[1])\
1100                     MAP_F2F(scan8[0] - 1 + 3*8, left_type[1])
1101                 if(MB_FIELD){
1102 #define MAP_F2F(idx, mb_type)\
1103                     if(!IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
1104                         h->ref_cache[list][idx] <<= 1;\
1105                         h->mv_cache[list][idx][1] /= 2;\
1106                         h->mvd_cache[list][idx][1] /= 2;\
1107                     }
1108                     MAP_MVS
1109 #undef MAP_F2F
1110                 }else{
1111 #define MAP_F2F(idx, mb_type)\
1112                     if(IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
1113                         h->ref_cache[list][idx] >>= 1;\
1114                         h->mv_cache[list][idx][1] <<= 1;\
1115                         h->mvd_cache[list][idx][1] <<= 1;\
1116                     }
1117                     MAP_MVS
1118 #undef MAP_F2F
1119                 }
1120             }
1121         }
1122     }
1123 #endif
1124
1125         h->neighbor_transform_size= !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[0]);
1126 }
1127
1128 /**
1129  *
1130  * @returns non zero if the loop filter can be skiped
1131  */
1132 static int fill_filter_caches(H264Context *h, int mb_type){
1133     MpegEncContext * const s = &h->s;
1134     const int mb_xy= h->mb_xy;
1135     int top_xy, left_xy[2];
1136     int top_type, left_type[2];
1137     int i;
1138
1139     top_xy     = mb_xy  - (s->mb_stride << MB_FIELD);
1140
1141     //FIXME deblocking could skip the intra and nnz parts.
1142
1143     /* Wow, what a mess, why didn't they simplify the interlacing & intra
1144      * stuff, I can't imagine that these complex rules are worth it. */
1145
1146     left_xy[1] = left_xy[0] = mb_xy-1;
1147     if(FRAME_MBAFF){
1148         const int left_mb_field_flag     = IS_INTERLACED(s->current_picture.mb_type[mb_xy-1]);
1149         const int curr_mb_field_flag     = IS_INTERLACED(mb_type);
1150         if(s->mb_y&1){
1151             if (left_mb_field_flag != curr_mb_field_flag) {
1152                 left_xy[0] -= s->mb_stride;
1153             }
1154         }else{
1155             if(curr_mb_field_flag){
1156                 top_xy      += s->mb_stride & (((s->current_picture.mb_type[top_xy    ]>>7)&1)-1);
1157             }
1158             if (left_mb_field_flag != curr_mb_field_flag) {
1159                 left_xy[1] += s->mb_stride;
1160             }
1161         }
1162     }
1163
1164     h->top_mb_xy = top_xy;
1165     h->left_mb_xy[0] = left_xy[0];
1166     h->left_mb_xy[1] = left_xy[1];
1167     {
1168         //for sufficiently low qp, filtering wouldn't do anything
1169         //this is a conservative estimate: could also check beta_offset and more accurate chroma_qp
1170         int qp_thresh = h->qp_thresh; //FIXME strictly we should store qp_thresh for each mb of a slice
1171         int qp = s->current_picture.qscale_table[mb_xy];
1172         if(qp <= qp_thresh
1173            && (left_xy[0]<0 || ((qp + s->current_picture.qscale_table[left_xy[0]] + 1)>>1) <= qp_thresh)
1174            && (top_xy   < 0 || ((qp + s->current_picture.qscale_table[top_xy    ] + 1)>>1) <= qp_thresh)){
1175             if(!FRAME_MBAFF)
1176                 return 1;
1177             if(   (left_xy[0]< 0            || ((qp + s->current_picture.qscale_table[left_xy[1]             ] + 1)>>1) <= qp_thresh)
1178                && (top_xy    < s->mb_stride || ((qp + s->current_picture.qscale_table[top_xy    -s->mb_stride] + 1)>>1) <= qp_thresh))
1179                 return 1;
1180         }
1181     }
1182
1183     if(h->deblocking_filter == 2){
1184         h->top_type    = top_type     = h->slice_table[top_xy     ] == h->slice_num ? s->current_picture.mb_type[top_xy]     : 0;
1185         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;
1186         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;
1187     }else{
1188         h->top_type    = top_type     = h->slice_table[top_xy     ] < 0xFFFF ? s->current_picture.mb_type[top_xy]     : 0;
1189         h->left_type[0]= left_type[0] = h->slice_table[left_xy[0] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[0]] : 0;
1190         h->left_type[1]= left_type[1] = h->slice_table[left_xy[1] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[1]] : 0;
1191     }
1192     if(IS_INTRA(mb_type))
1193         return 0;
1194
1195     AV_COPY64(&h->non_zero_count_cache[0+8*1], &h->non_zero_count[mb_xy][ 0]);
1196     AV_COPY64(&h->non_zero_count_cache[0+8*2], &h->non_zero_count[mb_xy][ 8]);
1197     *((uint32_t*)&h->non_zero_count_cache[0+8*5])= *((uint32_t*)&h->non_zero_count[mb_xy][16]);
1198     *((uint32_t*)&h->non_zero_count_cache[4+8*3])= *((uint32_t*)&h->non_zero_count[mb_xy][20]);
1199     AV_COPY64(&h->non_zero_count_cache[0+8*4], &h->non_zero_count[mb_xy][24]);
1200
1201     h->cbp= h->cbp_table[mb_xy];
1202
1203     {
1204         int list;
1205         for(list=0; list<h->list_count; list++){
1206             int8_t *ref;
1207             int y, b_stride;
1208             int16_t (*mv_dst)[2];
1209             int16_t (*mv_src)[2];
1210
1211             if(!USES_LIST(mb_type, list)){
1212                 fill_rectangle(  h->mv_cache[list][scan8[0]], 4, 4, 8, pack16to32(0,0), 4);
1213                 *(uint32_t*)&h->ref_cache[list][scan8[ 0]] =
1214                 *(uint32_t*)&h->ref_cache[list][scan8[ 2]] =
1215                 *(uint32_t*)&h->ref_cache[list][scan8[ 8]] =
1216                 *(uint32_t*)&h->ref_cache[list][scan8[10]] = ((LIST_NOT_USED)&0xFF)*0x01010101;
1217                 continue;
1218             }
1219
1220             ref = &s->current_picture.ref_index[list][h->mb2b8_xy[mb_xy]];
1221             {
1222                 int (*ref2frm)[64] = h->ref2frm[ h->slice_num&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
1223                 *(uint32_t*)&h->ref_cache[list][scan8[ 0]] =
1224                 *(uint32_t*)&h->ref_cache[list][scan8[ 2]] = (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101;
1225                 ref += h->b8_stride;
1226                 *(uint32_t*)&h->ref_cache[list][scan8[ 8]] =
1227                 *(uint32_t*)&h->ref_cache[list][scan8[10]] = (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101;
1228             }
1229
1230             b_stride = h->b_stride;
1231             mv_dst   = &h->mv_cache[list][scan8[0]];
1232             mv_src   = &s->current_picture.motion_val[list][4*s->mb_x + 4*s->mb_y*b_stride];
1233             for(y=0; y<4; y++){
1234                 AV_COPY128(mv_dst + 8*y, mv_src + y*b_stride);
1235             }
1236
1237         }
1238     }
1239
1240
1241 /*
1242 0 . T T. T T T T
1243 1 L . .L . . . .
1244 2 L . .L . . . .
1245 3 . T TL . . . .
1246 4 L . .L . . . .
1247 5 L . .. . . . .
1248 */
1249 //FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
1250     if(top_type){
1251         *(uint32_t*)&h->non_zero_count_cache[4+8*0]= *(uint32_t*)&h->non_zero_count[top_xy][4+3*8];
1252     }
1253
1254     if(left_type[0]){
1255         h->non_zero_count_cache[3+8*1]= h->non_zero_count[left_xy[0]][7+0*8];
1256         h->non_zero_count_cache[3+8*2]= h->non_zero_count[left_xy[0]][7+1*8];
1257         h->non_zero_count_cache[3+8*3]= h->non_zero_count[left_xy[0]][7+2*8];
1258         h->non_zero_count_cache[3+8*4]= h->non_zero_count[left_xy[0]][7+3*8];
1259     }
1260
1261     // CAVLC 8x8dct requires NNZ values for residual decoding that differ from what the loop filter needs
1262     if(!CABAC && h->pps.transform_8x8_mode){
1263         if(IS_8x8DCT(top_type)){
1264             h->non_zero_count_cache[4+8*0]=
1265             h->non_zero_count_cache[5+8*0]= h->cbp_table[top_xy] & 4;
1266             h->non_zero_count_cache[6+8*0]=
1267             h->non_zero_count_cache[7+8*0]= h->cbp_table[top_xy] & 8;
1268         }
1269         if(IS_8x8DCT(left_type[0])){
1270             h->non_zero_count_cache[3+8*1]=
1271             h->non_zero_count_cache[3+8*2]= h->cbp_table[left_xy[0]]&2; //FIXME check MBAFF
1272         }
1273         if(IS_8x8DCT(left_type[1])){
1274             h->non_zero_count_cache[3+8*3]=
1275             h->non_zero_count_cache[3+8*4]= h->cbp_table[left_xy[1]]&8; //FIXME check MBAFF
1276         }
1277
1278         if(IS_8x8DCT(mb_type)){
1279             h->non_zero_count_cache[scan8[0   ]]= h->non_zero_count_cache[scan8[1   ]]=
1280             h->non_zero_count_cache[scan8[2   ]]= h->non_zero_count_cache[scan8[3   ]]= h->cbp & 1;
1281
1282             h->non_zero_count_cache[scan8[0+ 4]]= h->non_zero_count_cache[scan8[1+ 4]]=
1283             h->non_zero_count_cache[scan8[2+ 4]]= h->non_zero_count_cache[scan8[3+ 4]]= h->cbp & 2;
1284
1285             h->non_zero_count_cache[scan8[0+ 8]]= h->non_zero_count_cache[scan8[1+ 8]]=
1286             h->non_zero_count_cache[scan8[2+ 8]]= h->non_zero_count_cache[scan8[3+ 8]]= h->cbp & 4;
1287
1288             h->non_zero_count_cache[scan8[0+12]]= h->non_zero_count_cache[scan8[1+12]]=
1289             h->non_zero_count_cache[scan8[2+12]]= h->non_zero_count_cache[scan8[3+12]]= h->cbp & 8;
1290         }
1291     }
1292
1293     if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
1294         int list;
1295         for(list=0; list<h->list_count; list++){
1296             if(USES_LIST(top_type, list)){
1297                 const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
1298                 const int b8_xy= h->mb2b8_xy[top_xy] + h->b8_stride;
1299                 int (*ref2frm)[64] = h->ref2frm[ h->slice_table[top_xy]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
1300                 AV_COPY128(h->mv_cache[list][scan8[0] + 0 - 1*8], s->current_picture.motion_val[list][b_xy + 0]);
1301                 h->ref_cache[list][scan8[0] + 0 - 1*8]=
1302                 h->ref_cache[list][scan8[0] + 1 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 0]];
1303                 h->ref_cache[list][scan8[0] + 2 - 1*8]=
1304                 h->ref_cache[list][scan8[0] + 3 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 1]];
1305             }else{
1306                 AV_ZERO128(h->mv_cache[list][scan8[0] + 0 - 1*8]);
1307                 *(uint32_t*)&h->ref_cache[list][scan8[0] + 0 - 1*8]= ((LIST_NOT_USED)&0xFF)*0x01010101;
1308             }
1309
1310             if(!IS_INTERLACED(mb_type^left_type[0])){
1311                 if(USES_LIST(left_type[0], list)){
1312                     const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
1313                     const int b8_xy= h->mb2b8_xy[left_xy[0]] + 1;
1314                     int (*ref2frm)[64] = h->ref2frm[ h->slice_table[left_xy[0]]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
1315                     *(uint32_t*)h->mv_cache[list][scan8[0] - 1 + 0 ]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*0];
1316                     *(uint32_t*)h->mv_cache[list][scan8[0] - 1 + 8 ]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*1];
1317                     *(uint32_t*)h->mv_cache[list][scan8[0] - 1 +16 ]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*2];
1318                     *(uint32_t*)h->mv_cache[list][scan8[0] - 1 +24 ]= *(uint32_t*)s->current_picture.motion_val[list][b_xy + h->b_stride*3];
1319                     h->ref_cache[list][scan8[0] - 1 + 0 ]=
1320                     h->ref_cache[list][scan8[0] - 1 + 8 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + h->b8_stride*0]];
1321                     h->ref_cache[list][scan8[0] - 1 +16 ]=
1322                     h->ref_cache[list][scan8[0] - 1 +24 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + h->b8_stride*1]];
1323                 }else{
1324                     *(uint32_t*)h->mv_cache [list][scan8[0] - 1 + 0 ]=
1325                     *(uint32_t*)h->mv_cache [list][scan8[0] - 1 + 8 ]=
1326                     *(uint32_t*)h->mv_cache [list][scan8[0] - 1 +16 ]=
1327                     *(uint32_t*)h->mv_cache [list][scan8[0] - 1 +24 ]= 0;
1328                     h->ref_cache[list][scan8[0] - 1 + 0  ]=
1329                     h->ref_cache[list][scan8[0] - 1 + 8  ]=
1330                     h->ref_cache[list][scan8[0] - 1 + 16 ]=
1331                     h->ref_cache[list][scan8[0] - 1 + 24 ]= LIST_NOT_USED;
1332                 }
1333             }
1334         }
1335     }
1336
1337     return 0;
1338 }
1339
1340 /**
1341  * gets the predicted intra4x4 prediction mode.
1342  */
1343 static inline int pred_intra_mode(H264Context *h, int n){
1344     const int index8= scan8[n];
1345     const int left= h->intra4x4_pred_mode_cache[index8 - 1];
1346     const int top = h->intra4x4_pred_mode_cache[index8 - 8];
1347     const int min= FFMIN(left, top);
1348
1349     tprintf(h->s.avctx, "mode:%d %d min:%d\n", left ,top, min);
1350
1351     if(min<0) return DC_PRED;
1352     else      return min;
1353 }
1354
1355 static inline void write_back_non_zero_count(H264Context *h){
1356     const int mb_xy= h->mb_xy;
1357
1358     AV_COPY64(&h->non_zero_count[mb_xy][ 0], &h->non_zero_count_cache[0+8*1]);
1359     AV_COPY64(&h->non_zero_count[mb_xy][ 8], &h->non_zero_count_cache[0+8*2]);
1360     *((uint32_t*)&h->non_zero_count[mb_xy][16]) = *((uint32_t*)&h->non_zero_count_cache[0+8*5]);
1361     *((uint32_t*)&h->non_zero_count[mb_xy][20]) = *((uint32_t*)&h->non_zero_count_cache[4+8*3]);
1362     AV_COPY64(&h->non_zero_count[mb_xy][24], &h->non_zero_count_cache[0+8*4]);
1363 }
1364
1365 static inline void write_back_motion(H264Context *h, int mb_type){
1366     MpegEncContext * const s = &h->s;
1367     const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride;
1368     const int b8_xy= 2*s->mb_x + 2*s->mb_y*h->b8_stride;
1369     int list;
1370
1371     if(!USES_LIST(mb_type, 0))
1372         fill_rectangle(&s->current_picture.ref_index[0][b8_xy], 2, 2, h->b8_stride, (uint8_t)LIST_NOT_USED, 1);
1373
1374     for(list=0; list<h->list_count; list++){
1375         int y, b_stride;
1376         int16_t (*mv_dst)[2];
1377         int16_t (*mv_src)[2];
1378
1379         if(!USES_LIST(mb_type, list))
1380             continue;
1381
1382         b_stride = h->b_stride;
1383         mv_dst   = &s->current_picture.motion_val[list][b_xy];
1384         mv_src   = &h->mv_cache[list][scan8[0]];
1385         for(y=0; y<4; y++){
1386             AV_COPY128(mv_dst + y*b_stride, mv_src + 8*y);
1387         }
1388         if( CABAC ) {
1389             int16_t (*mvd_dst)[2] = &h->mvd_table[list][b_xy];
1390             int16_t (*mvd_src)[2] = &h->mvd_cache[list][scan8[0]];
1391             if(IS_SKIP(mb_type))
1392                 fill_rectangle(mvd_dst, 4, 4, h->b_stride, 0, 4);
1393             else
1394             for(y=0; y<4; y++){
1395                 AV_COPY128(mvd_dst + y*b_stride, mvd_src + 8*y);
1396             }
1397         }
1398
1399         {
1400             int8_t *ref_index = &s->current_picture.ref_index[list][b8_xy];
1401             ref_index[0+0*h->b8_stride]= h->ref_cache[list][scan8[0]];
1402             ref_index[1+0*h->b8_stride]= h->ref_cache[list][scan8[4]];
1403             ref_index[0+1*h->b8_stride]= h->ref_cache[list][scan8[8]];
1404             ref_index[1+1*h->b8_stride]= h->ref_cache[list][scan8[12]];
1405         }
1406     }
1407
1408     if(h->slice_type_nos == FF_B_TYPE && CABAC){
1409         if(IS_8X8(mb_type)){
1410             uint8_t *direct_table = &h->direct_table[b8_xy];
1411             direct_table[1+0*h->b8_stride] = IS_DIRECT(h->sub_mb_type[1]) ? 1 : 0;
1412             direct_table[0+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[2]) ? 1 : 0;
1413             direct_table[1+1*h->b8_stride] = IS_DIRECT(h->sub_mb_type[3]) ? 1 : 0;
1414         }
1415     }
1416 }
1417
1418 static inline int get_dct8x8_allowed(H264Context *h){
1419     if(h->sps.direct_8x8_inference_flag)
1420         return !(*(uint64_t*)h->sub_mb_type & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8                )*0x0001000100010001ULL));
1421     else
1422         return !(*(uint64_t*)h->sub_mb_type & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8|MB_TYPE_DIRECT2)*0x0001000100010001ULL));
1423 }
1424
1425 static void predict_field_decoding_flag(H264Context *h){
1426     MpegEncContext * const s = &h->s;
1427     const int mb_xy= h->mb_xy;
1428     int mb_type = (h->slice_table[mb_xy-1] == h->slice_num)
1429                 ? s->current_picture.mb_type[mb_xy-1]
1430                 : (h->slice_table[mb_xy-s->mb_stride] == h->slice_num)
1431                 ? s->current_picture.mb_type[mb_xy-s->mb_stride]
1432                 : 0;
1433     h->mb_mbaff = h->mb_field_decoding_flag = IS_INTERLACED(mb_type) ? 1 : 0;
1434 }
1435
1436 /**
1437  * decodes a P_SKIP or B_SKIP macroblock
1438  */
1439 static void decode_mb_skip(H264Context *h){
1440     MpegEncContext * const s = &h->s;
1441     const int mb_xy= h->mb_xy;
1442     int mb_type=0;
1443
1444     memset(h->non_zero_count[mb_xy], 0, 32);
1445     memset(h->non_zero_count_cache + 8, 0, 8*5); //FIXME ugly, remove pfui
1446
1447     if(MB_FIELD)
1448         mb_type|= MB_TYPE_INTERLACED;
1449
1450     if( h->slice_type_nos == FF_B_TYPE )
1451     {
1452         // just for fill_caches. pred_direct_motion will set the real mb_type
1453         mb_type|= MB_TYPE_P0L0|MB_TYPE_P0L1|MB_TYPE_DIRECT2|MB_TYPE_SKIP;
1454
1455         fill_decode_caches(h, mb_type); //FIXME check what is needed and what not ...
1456         ff_h264_pred_direct_motion(h, &mb_type);
1457         mb_type|= MB_TYPE_SKIP;
1458     }
1459     else
1460     {
1461         int mx, my;
1462         mb_type|= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P1L0|MB_TYPE_SKIP;
1463
1464         fill_decode_caches(h, mb_type); //FIXME check what is needed and what not ...
1465         pred_pskip_motion(h, &mx, &my);
1466         fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, 0, 1);
1467         fill_rectangle(  h->mv_cache[0][scan8[0]], 4, 4, 8, pack16to32(mx,my), 4);
1468     }
1469
1470     write_back_motion(h, mb_type);
1471     s->current_picture.mb_type[mb_xy]= mb_type;
1472     s->current_picture.qscale_table[mb_xy]= s->qscale;
1473     h->slice_table[ mb_xy ]= h->slice_num;
1474     h->prev_mb_skipped= 1;
1475 }
1476
1477 #include "h264_mvpred.h" //For pred_pskip_motion()
1478
1479 #endif /* AVCODEC_H264_H */