2 * H.26L/H.264/AVC/JVT/14496-10/... encoder/decoder
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
5 * This file is part of FFmpeg.
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.
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.
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
24 * H.264 / AVC / MPEG4 part10 codec.
25 * @author Michael Niedermayer <michaelni@gmx.at>
28 #ifndef AVCODEC_H264_H
29 #define AVCODEC_H264_H
31 #include "libavutil/intreadwrite.h"
34 #include "mpegvideo.h"
37 #include "rectangle.h"
39 #define interlaced_dct interlaced_dct_is_a_bad_name
40 #define mb_intra mb_intra_is_not_initialized_see_mb_type
42 #define LUMA_DC_BLOCK_INDEX 24
43 #define CHROMA_DC_BLOCK_INDEX 25
45 #define CHROMA_DC_COEFF_TOKEN_VLC_BITS 8
46 #define COEFF_TOKEN_VLC_BITS 8
47 #define TOTAL_ZEROS_VLC_BITS 9
48 #define CHROMA_DC_TOTAL_ZEROS_VLC_BITS 3
49 #define RUN_VLC_BITS 3
50 #define RUN7_VLC_BITS 6
52 #define MAX_SPS_COUNT 32
53 #define MAX_PPS_COUNT 256
55 #define MAX_MMCO_COUNT 66
57 #define MAX_DELAYED_PIC_COUNT 16
59 /* Compiling in interlaced support reduces the speed
60 * of progressive decoding by about 2%. */
61 #define ALLOW_INTERLACE
63 #define ALLOW_NOCHROMA
68 * The maximum number of slices supported by the decoder.
69 * must be a power of 2
73 #ifdef ALLOW_INTERLACE
74 #define MB_MBAFF h->mb_mbaff
75 #define MB_FIELD h->mb_field_decoding_flag
76 #define FRAME_MBAFF h->mb_aff_frame
77 #define FIELD_PICTURE (s->picture_structure != PICT_FRAME)
82 #define FIELD_PICTURE 0
84 #define IS_INTERLACED(mb_type) 0
86 #define FIELD_OR_MBAFF_PICTURE (FRAME_MBAFF || FIELD_PICTURE)
89 #define CHROMA h->sps.chroma_format_idc
95 #define CABAC h->pps.cabac
98 #define EXTENDED_SAR 255
100 #define MB_TYPE_REF0 MB_TYPE_ACPRED //dirty but it fits in 16 bit
101 #define MB_TYPE_8x8DCT 0x01000000
102 #define IS_REF0(a) ((a) & MB_TYPE_REF0)
103 #define IS_8x8DCT(a) ((a) & MB_TYPE_8x8DCT)
106 * Value of Picture.reference when Picture is not a reference picture, but
107 * is held for delayed output.
109 #define DELAYED_PIC_REF 4
111 #define QP_MAX_NUM (51 + 2*6) // The maximum supported qp
128 NAL_AUXILIARY_SLICE=19
135 SEI_BUFFERING_PERIOD = 0, ///< buffering period (H.264, D.1.1)
136 SEI_TYPE_PIC_TIMING = 1, ///< picture timing
137 SEI_TYPE_USER_DATA_UNREGISTERED = 5, ///< unregistered user data
138 SEI_TYPE_RECOVERY_POINT = 6 ///< recovery point (frame # to decoder sync)
142 * pic_struct in picture timing SEI message
145 SEI_PIC_STRUCT_FRAME = 0, ///< 0: %frame
146 SEI_PIC_STRUCT_TOP_FIELD = 1, ///< 1: top field
147 SEI_PIC_STRUCT_BOTTOM_FIELD = 2, ///< 2: bottom field
148 SEI_PIC_STRUCT_TOP_BOTTOM = 3, ///< 3: top field, bottom field, in that order
149 SEI_PIC_STRUCT_BOTTOM_TOP = 4, ///< 4: bottom field, top field, in that order
150 SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, ///< 5: top field, bottom field, top field repeated, in that order
151 SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///< 6: bottom field, top field, bottom field repeated, in that order
152 SEI_PIC_STRUCT_FRAME_DOUBLING = 7, ///< 7: %frame doubling
153 SEI_PIC_STRUCT_FRAME_TRIPLING = 8 ///< 8: %frame tripling
157 * Sequence parameter set
163 int chroma_format_idc;
164 int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag
165 int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4
166 int poc_type; ///< pic_order_cnt_type
167 int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4
168 int delta_pic_order_always_zero_flag;
169 int offset_for_non_ref_pic;
170 int offset_for_top_to_bottom_field;
171 int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle
172 int ref_frame_count; ///< num_ref_frames
173 int gaps_in_frame_num_allowed_flag;
174 int mb_width; ///< pic_width_in_mbs_minus1 + 1
175 int mb_height; ///< pic_height_in_map_units_minus1 + 1
176 int frame_mbs_only_flag;
177 int mb_aff; ///<mb_adaptive_frame_field_flag
178 int direct_8x8_inference_flag;
179 int crop; ///< frame_cropping_flag
180 unsigned int crop_left; ///< frame_cropping_rect_left_offset
181 unsigned int crop_right; ///< frame_cropping_rect_right_offset
182 unsigned int crop_top; ///< frame_cropping_rect_top_offset
183 unsigned int crop_bottom; ///< frame_cropping_rect_bottom_offset
184 int vui_parameters_present_flag;
186 int video_signal_type_present_flag;
188 int colour_description_present_flag;
189 enum AVColorPrimaries color_primaries;
190 enum AVColorTransferCharacteristic color_trc;
191 enum AVColorSpace colorspace;
192 int timing_info_present_flag;
193 uint32_t num_units_in_tick;
195 int fixed_frame_rate_flag;
196 short offset_for_ref_frame[256]; //FIXME dyn aloc?
197 int bitstream_restriction_flag;
198 int num_reorder_frames;
199 int scaling_matrix_present;
200 uint8_t scaling_matrix4[6][16];
201 uint8_t scaling_matrix8[2][64];
202 int nal_hrd_parameters_present_flag;
203 int vcl_hrd_parameters_present_flag;
204 int pic_struct_present_flag;
205 int time_offset_length;
206 int cpb_cnt; ///< See H.264 E.1.2
207 int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 +1
208 int cpb_removal_delay_length; ///< cpb_removal_delay_length_minus1 + 1
209 int dpb_output_delay_length; ///< dpb_output_delay_length_minus1 + 1
210 int bit_depth_luma; ///< bit_depth_luma_minus8 + 8
211 int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8
212 int residual_color_transform_flag; ///< residual_colour_transform_flag
213 int constraint_set_flags; ///< constraint_set[0-3]_flag
217 * Picture parameter set
221 int cabac; ///< entropy_coding_mode_flag
222 int pic_order_present; ///< pic_order_present_flag
223 int slice_group_count; ///< num_slice_groups_minus1 + 1
224 int mb_slice_group_map_type;
225 unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1
226 int weighted_pred; ///< weighted_pred_flag
227 int weighted_bipred_idc;
228 int init_qp; ///< pic_init_qp_minus26 + 26
229 int init_qs; ///< pic_init_qs_minus26 + 26
230 int chroma_qp_index_offset[2];
231 int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
232 int constrained_intra_pred; ///< constrained_intra_pred_flag
233 int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
234 int transform_8x8_mode; ///< transform_8x8_mode_flag
235 uint8_t scaling_matrix4[6][16];
236 uint8_t scaling_matrix8[2][64];
237 uint8_t chroma_qp_table[2][64]; ///< pre-scaled (with chroma_qp_index_offset) version of qp_table
242 * Memory management control operation opcode.
244 typedef enum MMCOOpcode{
255 * Memory management control operation.
259 int short_pic_num; ///< pic_num without wrapping (pic_num & max_pic_num)
260 int long_arg; ///< index, pic_num, or num long refs depending on opcode
266 typedef struct H264Context{
268 H264DSPContext h264dsp;
269 int pixel_shift; ///< 0 for 8-bit H264, 1 for high-bit-depth H264
270 int chroma_qp[2]; //QPc
272 int qp_thresh; ///< QP threshold to skip loopfilter
278 int chroma_pred_mode;
279 int intra16x16_pred_mode;
291 const uint8_t * left_block;
292 int topleft_partition;
294 int8_t intra4x4_pred_mode_cache[5*8];
295 int8_t (*intra4x4_pred_mode);
297 unsigned int topleft_samples_available;
298 unsigned int top_samples_available;
299 unsigned int topright_samples_available;
300 unsigned int left_samples_available;
301 uint8_t (*top_borders[2])[(16+2*8)*2];
304 * non zero coeff count cache.
305 * is 64 if not available.
307 DECLARE_ALIGNED(8, uint8_t, non_zero_count_cache)[6*8];
315 uint8_t (*non_zero_count)[32];
318 * Motion vector cache.
320 DECLARE_ALIGNED(16, int16_t, mv_cache)[2][5*8][2];
321 DECLARE_ALIGNED(8, int8_t, ref_cache)[2][5*8];
322 #define LIST_NOT_USED -1 //FIXME rename?
323 #define PART_NOT_AVAILABLE -2
326 * is 1 if the specific list MV&references are set to 0,0,-2.
328 int mv_cache_clean[2];
331 * number of neighbors (top and/or left) that used 8x8 dct
333 int neighbor_transform_size;
336 * block_offset[ 0..23] for frame macroblocks
337 * block_offset[24..47] for field macroblocks
339 int block_offset[2*(16+8)];
341 uint32_t *mb2b_xy; //FIXME are these 4 a good idea?
343 int b_stride; //FIXME use s->b4_stride
345 int mb_linesize; ///< may be equal to s->linesize or s->linesize*2, for mbaff
351 SPS sps; ///< current sps
356 PPS pps; //FIXME move to Picture perhaps? (->no) do we need that?
358 uint32_t dequant4_buffer[6][QP_MAX_NUM+1][16]; //FIXME should these be moved down?
359 uint32_t dequant8_buffer[2][QP_MAX_NUM+1][64];
360 uint32_t (*dequant4_coeff[6])[16];
361 uint32_t (*dequant8_coeff[2])[64];
364 uint16_t *slice_table; ///< slice_table_base + 2*mb_stride + 1
366 int slice_type_nos; ///< S free slice type (SI/SP are remapped to I/P)
367 int slice_type_fixed;
369 //interlacing specific flags
371 int mb_field_decoding_flag;
372 int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag
374 DECLARE_ALIGNED(8, uint16_t, sub_mb_type)[4];
376 //Weighted pred stuff
378 int use_weight_chroma;
379 int luma_log2_weight_denom;
380 int chroma_log2_weight_denom;
381 //The following 2 can be changed to int8_t but that causes 10cpu cycles speedloss
382 int luma_weight[48][2][2];
383 int chroma_weight[48][2][2][2];
384 int implicit_weight[48][48][2];
386 int direct_spatial_mv_pred;
389 int dist_scale_factor[16];
390 int dist_scale_factor_field[2][32];
391 int map_col_to_list0[2][16+32];
392 int map_col_to_list0_field[2][2][16+32];
395 * num_ref_idx_l0/1_active_minus1 + 1
397 uint8_t *list_counts; ///< Array of list_count per MB specifying the slice type
398 unsigned int ref_count[2]; ///< counts frames or fields, depending on current mb mode
399 unsigned int list_count;
400 Picture ref_list[2][48]; /**< 0..15: frame refs, 16..47: mbaff field refs.
401 Reordered version of default_ref_list
402 according to picture reordering in slice header */
403 int ref2frm[MAX_SLICES][2][64]; ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
406 GetBitContext intra_gb;
407 GetBitContext inter_gb;
408 GetBitContext *intra_gb_ptr;
409 GetBitContext *inter_gb_ptr;
411 DECLARE_ALIGNED(16, DCTELEM, mb)[16*24*2]; ///< as a dct coeffecient is int32_t in high depth, we need to reserve twice the space.
412 DECLARE_ALIGNED(16, DCTELEM, mb_luma_dc)[16*2];
413 DCTELEM mb_padding[256*2]; ///< 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
419 uint8_t cabac_state[460];
421 /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0,1,2), 0x0? luma_cbp */
426 /* chroma_pred_mode for i4x4 or i16x16, else 0 */
427 uint8_t *chroma_pred_mode_table;
428 int last_qscale_diff;
429 uint8_t (*mvd_table[2])[2];
430 DECLARE_ALIGNED(16, uint8_t, mvd_cache)[2][5*8][2];
431 uint8_t *direct_table;
432 uint8_t direct_cache[5*8];
434 uint8_t zigzag_scan[16];
435 uint8_t zigzag_scan8x8[64];
436 uint8_t zigzag_scan8x8_cavlc[64];
437 uint8_t field_scan[16];
438 uint8_t field_scan8x8[64];
439 uint8_t field_scan8x8_cavlc[64];
440 const uint8_t *zigzag_scan_q0;
441 const uint8_t *zigzag_scan8x8_q0;
442 const uint8_t *zigzag_scan8x8_cavlc_q0;
443 const uint8_t *field_scan_q0;
444 const uint8_t *field_scan8x8_q0;
445 const uint8_t *field_scan8x8_cavlc_q0;
454 int deblocking_filter; ///< disable_deblocking_filter_idc with 1<->0
455 int slice_alpha_c0_offset;
456 int slice_beta_offset;
458 //=============================================================
459 //Things below are not used in the MB or more inner code
463 uint8_t *rbsp_buffer[2];
464 unsigned int rbsp_buffer_size[2];
467 * Used to parse AVC variant of h264
469 int is_avc; ///< this flag is != 0 if codec is avc1
470 int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
471 int got_first; ///< this flag is != 0 if we've parsed a frame
473 SPS *sps_buffers[MAX_SPS_COUNT];
474 PPS *pps_buffers[MAX_PPS_COUNT];
476 int dequant_coeff_pps; ///< reinit tables when pps changes
478 uint16_t *slice_table_base;
484 int delta_poc_bottom;
487 int prev_poc_msb; ///< poc_msb of the last reference pic for POC type 0
488 int prev_poc_lsb; ///< poc_lsb of the last reference pic for POC type 0
489 int frame_num_offset; ///< for POC type 2
490 int prev_frame_num_offset; ///< for POC type 2
491 int prev_frame_num; ///< frame_num of the last pic for POC type 1/2
494 * frame_num for frames or 2*frame_num+1 for field pics.
499 * max_frame_num or 2*max_frame_num for field pics.
503 int redundant_pic_count;
505 Picture *short_ref[32];
506 Picture *long_ref[32];
507 Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
508 Picture *delayed_pic[MAX_DELAYED_PIC_COUNT+2]; //FIXME size?
509 Picture *next_output_pic;
511 int next_outputed_poc;
514 * memory management control operations buffer.
516 MMCO mmco[MAX_MMCO_COUNT];
519 int long_ref_count; ///< number of actual long term references
520 int short_ref_count; ///< number of actual short term references
525 * @defgroup multithreading Members for slice based multithreading
528 struct H264Context *thread_context[MAX_THREADS];
531 * current slice number, used to initalize slice_num of each thread/context
536 * Max number of threads / contexts.
537 * This is equal to AVCodecContext.thread_count unless
538 * multithreaded decoding is impossible, in which case it is
544 * 1 if the single thread fallback warning has already been
545 * displayed, 0 otherwise.
547 int single_decode_warning;
553 * pic_struct in picture timing SEI message
555 SEI_PicStructType sei_pic_struct;
558 * Complement sei_pic_struct
559 * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
560 * However, soft telecined frames may have these values.
561 * This is used in an attempt to flag soft telecine progressive.
563 int prev_interlaced_frame;
566 * Bit set of clock types for fields/frames in picture timing SEI message.
567 * For each found ct_type, appropriate bit is set (e.g., bit 1 for
573 * dpb_output_delay in picture timing SEI message, see H.264 C.2.2
575 int sei_dpb_output_delay;
578 * cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
580 int sei_cpb_removal_delay;
583 * recovery_frame_cnt from SEI message
585 * Set to -1 if no recovery point SEI message found or to number of frames
586 * before playback synchronizes. Frames having recovery point are key
589 int sei_recovery_frame_cnt;
591 int luma_weight_flag[2]; ///< 7.4.3.2 luma_weight_lX_flag
592 int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
595 int sei_buffering_period_present; ///< Buffering period SEI flag
596 int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
600 extern const uint8_t ff_h264_chroma_qp[3][QP_MAX_NUM+1]; ///< One chroma qp table for each supported bit depth (8, 9, 10).
605 int ff_h264_decode_sei(H264Context *h);
610 int ff_h264_decode_seq_parameter_set(H264Context *h);
613 * compute profile from sps
615 int ff_h264_get_profile(SPS *sps);
620 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length);
623 * Decode a network abstraction layer unit.
624 * @param consumed is the number of bytes used as input
625 * @param length is the length of the array
626 * @param dst_length is the number of decoded bytes FIXME here or a decode rbsp tailing?
627 * @return decoded bytes, might be src+1 if no escapes
629 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length);
632 * Free any data that may have been allocated in the H264 context like SPS, PPS etc.
634 av_cold void ff_h264_free_context(H264Context *h);
637 * Reconstruct bitstream slice_type.
639 int ff_h264_get_slice_type(const H264Context *h);
645 int ff_h264_alloc_tables(H264Context *h);
648 * Fill the default_ref_list.
650 int ff_h264_fill_default_ref_list(H264Context *h);
652 int ff_h264_decode_ref_pic_list_reordering(H264Context *h);
653 void ff_h264_fill_mbaff_ref_list(H264Context *h);
654 void ff_h264_remove_all_refs(H264Context *h);
657 * Execute the reference picture marking (memory management control operations).
659 int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count);
661 int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb);
663 void ff_generate_sliding_window_mmcos(H264Context *h);
667 * Check if the top & left blocks are available if needed & change the dc mode so it only uses the available blocks.
669 int ff_h264_check_intra4x4_pred_mode(H264Context *h);
672 * Check if the top & left blocks are available if needed & change the dc mode so it only uses the available blocks.
674 int ff_h264_check_intra_pred_mode(H264Context *h, int mode);
676 void ff_h264_write_back_intra_pred_mode(H264Context *h);
677 void ff_h264_hl_decode_mb(H264Context *h);
678 int ff_h264_frame_start(H264Context *h);
679 int ff_h264_decode_extradata(H264Context *h);
680 av_cold int ff_h264_decode_init(AVCodecContext *avctx);
681 av_cold int ff_h264_decode_end(AVCodecContext *avctx);
682 av_cold void ff_h264_decode_init_vlc(void);
685 * Decode a macroblock
686 * @return 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
688 int ff_h264_decode_mb_cavlc(H264Context *h);
691 * Decode a CABAC coded macroblock
692 * @return 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
694 int ff_h264_decode_mb_cabac(H264Context *h);
696 void ff_h264_init_cabac_states(H264Context *h);
698 void ff_h264_direct_dist_scale_factor(H264Context * const h);
699 void ff_h264_direct_ref_list_init(H264Context * const h);
700 void ff_h264_pred_direct_motion(H264Context * const h, int *mb_type);
702 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);
703 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);
706 * Reset SEI values at the beginning of the frame.
708 * @param h H.264 context.
710 void ff_h264_reset_sei(H264Context *h);
713 void ff_hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
714 qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
715 qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
716 h264_weight_func *weight_op, h264_biweight_func *weight_avg);
729 /* Scan8 organization:
737 * DY/DU/DV are for luma/chroma DC.
740 //This table must be here because scan8[constant] must be known at compiletime
741 static const uint8_t scan8[16 + 2*4 + 3]={
742 4+1*8, 5+1*8, 4+2*8, 5+2*8,
743 6+1*8, 7+1*8, 6+2*8, 7+2*8,
744 4+3*8, 5+3*8, 4+4*8, 5+4*8,
745 6+3*8, 7+3*8, 6+4*8, 7+4*8,
753 static av_always_inline uint32_t pack16to32(int a, int b){
755 return (b&0xFFFF) + (a<<16);
757 return (a&0xFFFF) + (b<<16);
761 static av_always_inline uint16_t pack8to16(int a, int b){
763 return (b&0xFF) + (a<<8);
765 return (a&0xFF) + (b<<8);
770 * gets the chroma qp.
772 static inline int get_chroma_qp(H264Context *h, int t, int qscale){
773 return h->pps.chroma_qp_table[t][qscale];
776 static inline void pred_pskip_motion(H264Context * const h, int * const mx, int * const my);
778 static void fill_decode_neighbors(H264Context *h, int mb_type){
779 MpegEncContext * const s = &h->s;
780 const int mb_xy= h->mb_xy;
781 int topleft_xy, top_xy, topright_xy, left_xy[2];
782 static const uint8_t left_block_options[4][16]={
783 {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},
784 {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},
785 {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},
786 {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}
789 h->topleft_partition= -1;
791 top_xy = mb_xy - (s->mb_stride << MB_FIELD);
793 /* Wow, what a mess, why didn't they simplify the interlacing & intra
794 * stuff, I can't imagine that these complex rules are worth it. */
796 topleft_xy = top_xy - 1;
797 topright_xy= top_xy + 1;
798 left_xy[1] = left_xy[0] = mb_xy-1;
799 h->left_block = left_block_options[0];
801 const int left_mb_field_flag = IS_INTERLACED(s->current_picture.mb_type[mb_xy-1]);
802 const int curr_mb_field_flag = IS_INTERLACED(mb_type);
804 if (left_mb_field_flag != curr_mb_field_flag) {
805 left_xy[1] = left_xy[0] = mb_xy - s->mb_stride - 1;
806 if (curr_mb_field_flag) {
807 left_xy[1] += s->mb_stride;
808 h->left_block = left_block_options[3];
810 topleft_xy += s->mb_stride;
811 // take top left mv from the middle of the mb, as opposed to all other modes which use the bottom right partition
812 h->topleft_partition = 0;
813 h->left_block = left_block_options[1];
817 if(curr_mb_field_flag){
818 topleft_xy += s->mb_stride & (((s->current_picture.mb_type[top_xy - 1]>>7)&1)-1);
819 topright_xy += s->mb_stride & (((s->current_picture.mb_type[top_xy + 1]>>7)&1)-1);
820 top_xy += s->mb_stride & (((s->current_picture.mb_type[top_xy ]>>7)&1)-1);
822 if (left_mb_field_flag != curr_mb_field_flag) {
823 if (curr_mb_field_flag) {
824 left_xy[1] += s->mb_stride;
825 h->left_block = left_block_options[3];
827 h->left_block = left_block_options[2];
833 h->topleft_mb_xy = topleft_xy;
834 h->top_mb_xy = top_xy;
835 h->topright_mb_xy= topright_xy;
836 h->left_mb_xy[0] = left_xy[0];
837 h->left_mb_xy[1] = left_xy[1];
838 //FIXME do we need all in the context?
840 h->topleft_type = s->current_picture.mb_type[topleft_xy] ;
841 h->top_type = s->current_picture.mb_type[top_xy] ;
842 h->topright_type= s->current_picture.mb_type[topright_xy];
843 h->left_type[0] = s->current_picture.mb_type[left_xy[0]] ;
844 h->left_type[1] = s->current_picture.mb_type[left_xy[1]] ;
847 if(h->slice_table[topleft_xy ] != h->slice_num) h->topleft_type = 0;
848 if(h->slice_table[top_xy ] != h->slice_num) h->top_type = 0;
849 if(h->slice_table[left_xy[0] ] != h->slice_num) h->left_type[0] = h->left_type[1] = 0;
851 if(h->slice_table[topleft_xy ] != h->slice_num){
853 if(h->slice_table[top_xy ] != h->slice_num) h->top_type = 0;
854 if(h->slice_table[left_xy[0] ] != h->slice_num) h->left_type[0] = h->left_type[1] = 0;
857 if(h->slice_table[topright_xy] != h->slice_num) h->topright_type= 0;
860 static void fill_decode_caches(H264Context *h, int mb_type){
861 MpegEncContext * const s = &h->s;
862 int topleft_xy, top_xy, topright_xy, left_xy[2];
863 int topleft_type, top_type, topright_type, left_type[2];
864 const uint8_t * left_block= h->left_block;
867 topleft_xy = h->topleft_mb_xy ;
868 top_xy = h->top_mb_xy ;
869 topright_xy = h->topright_mb_xy;
870 left_xy[0] = h->left_mb_xy[0] ;
871 left_xy[1] = h->left_mb_xy[1] ;
872 topleft_type = h->topleft_type ;
873 top_type = h->top_type ;
874 topright_type= h->topright_type ;
875 left_type[0] = h->left_type[0] ;
876 left_type[1] = h->left_type[1] ;
878 if(!IS_SKIP(mb_type)){
879 if(IS_INTRA(mb_type)){
880 int type_mask= h->pps.constrained_intra_pred ? IS_INTRA(-1) : -1;
881 h->topleft_samples_available=
882 h->top_samples_available=
883 h->left_samples_available= 0xFFFF;
884 h->topright_samples_available= 0xEEEA;
886 if(!(top_type & type_mask)){
887 h->topleft_samples_available= 0xB3FF;
888 h->top_samples_available= 0x33FF;
889 h->topright_samples_available= 0x26EA;
891 if(IS_INTERLACED(mb_type) != IS_INTERLACED(left_type[0])){
892 if(IS_INTERLACED(mb_type)){
893 if(!(left_type[0] & type_mask)){
894 h->topleft_samples_available&= 0xDFFF;
895 h->left_samples_available&= 0x5FFF;
897 if(!(left_type[1] & type_mask)){
898 h->topleft_samples_available&= 0xFF5F;
899 h->left_samples_available&= 0xFF5F;
902 int left_typei = s->current_picture.mb_type[left_xy[0] + s->mb_stride];
904 assert(left_xy[0] == left_xy[1]);
905 if(!((left_typei & type_mask) && (left_type[0] & type_mask))){
906 h->topleft_samples_available&= 0xDF5F;
907 h->left_samples_available&= 0x5F5F;
911 if(!(left_type[0] & type_mask)){
912 h->topleft_samples_available&= 0xDF5F;
913 h->left_samples_available&= 0x5F5F;
917 if(!(topleft_type & type_mask))
918 h->topleft_samples_available&= 0x7FFF;
920 if(!(topright_type & type_mask))
921 h->topright_samples_available&= 0xFBFF;
923 if(IS_INTRA4x4(mb_type)){
924 if(IS_INTRA4x4(top_type)){
925 AV_COPY32(h->intra4x4_pred_mode_cache+4+8*0, h->intra4x4_pred_mode + h->mb2br_xy[top_xy]);
927 h->intra4x4_pred_mode_cache[4+8*0]=
928 h->intra4x4_pred_mode_cache[5+8*0]=
929 h->intra4x4_pred_mode_cache[6+8*0]=
930 h->intra4x4_pred_mode_cache[7+8*0]= 2 - 3*!(top_type & type_mask);
933 if(IS_INTRA4x4(left_type[i])){
934 int8_t *mode= h->intra4x4_pred_mode + h->mb2br_xy[left_xy[i]];
935 h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]= mode[6-left_block[0+2*i]];
936 h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= mode[6-left_block[1+2*i]];
938 h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]=
939 h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= 2 - 3*!(left_type[i] & type_mask);
954 //FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
956 AV_COPY32(&h->non_zero_count_cache[4+8*0], &h->non_zero_count[top_xy][4+3*8]);
957 h->non_zero_count_cache[1+8*0]= h->non_zero_count[top_xy][1+1*8];
958 h->non_zero_count_cache[2+8*0]= h->non_zero_count[top_xy][2+1*8];
960 h->non_zero_count_cache[1+8*3]= h->non_zero_count[top_xy][1+2*8];
961 h->non_zero_count_cache[2+8*3]= h->non_zero_count[top_xy][2+2*8];
963 h->non_zero_count_cache[1+8*0]=
964 h->non_zero_count_cache[2+8*0]=
966 h->non_zero_count_cache[1+8*3]=
967 h->non_zero_count_cache[2+8*3]=
968 AV_WN32A(&h->non_zero_count_cache[4+8*0], CABAC && !IS_INTRA(mb_type) ? 0 : 0x40404040);
971 for (i=0; i<2; i++) {
973 h->non_zero_count_cache[3+8*1 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[8+0+2*i]];
974 h->non_zero_count_cache[3+8*2 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[8+1+2*i]];
975 h->non_zero_count_cache[0+8*1 + 8*i]= h->non_zero_count[left_xy[i]][left_block[8+4+2*i]];
976 h->non_zero_count_cache[0+8*4 + 8*i]= h->non_zero_count[left_xy[i]][left_block[8+5+2*i]];
978 h->non_zero_count_cache[3+8*1 + 2*8*i]=
979 h->non_zero_count_cache[3+8*2 + 2*8*i]=
980 h->non_zero_count_cache[0+8*1 + 8*i]=
981 h->non_zero_count_cache[0+8*4 + 8*i]= CABAC && !IS_INTRA(mb_type) ? 0 : 64;
988 h->top_cbp = h->cbp_table[top_xy];
990 h->top_cbp = IS_INTRA(mb_type) ? 0x1CF : 0x00F;
994 h->left_cbp = (h->cbp_table[left_xy[0]] & 0x1f0)
995 | ((h->cbp_table[left_xy[0]]>>(left_block[0]&(~1)))&2)
996 | (((h->cbp_table[left_xy[1]]>>(left_block[2]&(~1)))&2) << 2);
998 h->left_cbp = IS_INTRA(mb_type) ? 0x1CF : 0x00F;
1003 if(IS_INTER(mb_type) || (IS_DIRECT(mb_type) && h->direct_spatial_mv_pred)){
1005 for(list=0; list<h->list_count; list++){
1006 if(!USES_LIST(mb_type, list)){
1007 /*if(!h->mv_cache_clean[list]){
1008 memset(h->mv_cache [list], 0, 8*5*2*sizeof(int16_t)); //FIXME clean only input? clean at all?
1009 memset(h->ref_cache[list], PART_NOT_AVAILABLE, 8*5*sizeof(int8_t));
1010 h->mv_cache_clean[list]= 1;
1014 assert(!(IS_DIRECT(mb_type) && !h->direct_spatial_mv_pred));
1016 h->mv_cache_clean[list]= 0;
1018 if(USES_LIST(top_type, list)){
1019 const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
1020 AV_COPY128(h->mv_cache[list][scan8[0] + 0 - 1*8], s->current_picture.motion_val[list][b_xy + 0]);
1021 h->ref_cache[list][scan8[0] + 0 - 1*8]=
1022 h->ref_cache[list][scan8[0] + 1 - 1*8]= s->current_picture.ref_index[list][4*top_xy + 2];
1023 h->ref_cache[list][scan8[0] + 2 - 1*8]=
1024 h->ref_cache[list][scan8[0] + 3 - 1*8]= s->current_picture.ref_index[list][4*top_xy + 3];
1026 AV_ZERO128(h->mv_cache[list][scan8[0] + 0 - 1*8]);
1027 AV_WN32A(&h->ref_cache[list][scan8[0] + 0 - 1*8], ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101);
1030 if(mb_type & (MB_TYPE_16x8|MB_TYPE_8x8)){
1032 int cache_idx = scan8[0] - 1 + i*2*8;
1033 if(USES_LIST(left_type[i], list)){
1034 const int b_xy= h->mb2b_xy[left_xy[i]] + 3;
1035 const int b8_xy= 4*left_xy[i] + 1;
1036 AV_COPY32(h->mv_cache[list][cache_idx ], s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[0+i*2]]);
1037 AV_COPY32(h->mv_cache[list][cache_idx+8], s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[1+i*2]]);
1038 h->ref_cache[list][cache_idx ]= s->current_picture.ref_index[list][b8_xy + (left_block[0+i*2]&~1)];
1039 h->ref_cache[list][cache_idx+8]= s->current_picture.ref_index[list][b8_xy + (left_block[1+i*2]&~1)];
1041 AV_ZERO32(h->mv_cache [list][cache_idx ]);
1042 AV_ZERO32(h->mv_cache [list][cache_idx+8]);
1043 h->ref_cache[list][cache_idx ]=
1044 h->ref_cache[list][cache_idx+8]= (left_type[i]) ? LIST_NOT_USED : PART_NOT_AVAILABLE;
1048 if(USES_LIST(left_type[0], list)){
1049 const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
1050 const int b8_xy= 4*left_xy[0] + 1;
1051 AV_COPY32(h->mv_cache[list][scan8[0] - 1], s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[0]]);
1052 h->ref_cache[list][scan8[0] - 1]= s->current_picture.ref_index[list][b8_xy + (left_block[0]&~1)];
1054 AV_ZERO32(h->mv_cache [list][scan8[0] - 1]);
1055 h->ref_cache[list][scan8[0] - 1]= left_type[0] ? LIST_NOT_USED : PART_NOT_AVAILABLE;
1059 if(USES_LIST(topright_type, list)){
1060 const int b_xy= h->mb2b_xy[topright_xy] + 3*h->b_stride;
1061 AV_COPY32(h->mv_cache[list][scan8[0] + 4 - 1*8], s->current_picture.motion_val[list][b_xy]);
1062 h->ref_cache[list][scan8[0] + 4 - 1*8]= s->current_picture.ref_index[list][4*topright_xy + 2];
1064 AV_ZERO32(h->mv_cache [list][scan8[0] + 4 - 1*8]);
1065 h->ref_cache[list][scan8[0] + 4 - 1*8]= topright_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
1067 if(h->ref_cache[list][scan8[0] + 4 - 1*8] < 0){
1068 if(USES_LIST(topleft_type, list)){
1069 const int b_xy = h->mb2b_xy [topleft_xy] + 3 + h->b_stride + (h->topleft_partition & 2*h->b_stride);
1070 const int b8_xy= 4*topleft_xy + 1 + (h->topleft_partition & 2);
1071 AV_COPY32(h->mv_cache[list][scan8[0] - 1 - 1*8], s->current_picture.motion_val[list][b_xy]);
1072 h->ref_cache[list][scan8[0] - 1 - 1*8]= s->current_picture.ref_index[list][b8_xy];
1074 AV_ZERO32(h->mv_cache[list][scan8[0] - 1 - 1*8]);
1075 h->ref_cache[list][scan8[0] - 1 - 1*8]= topleft_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
1079 if((mb_type&(MB_TYPE_SKIP|MB_TYPE_DIRECT2)) && !FRAME_MBAFF)
1082 if(!(mb_type&(MB_TYPE_SKIP|MB_TYPE_DIRECT2))) {
1083 h->ref_cache[list][scan8[4 ]] =
1084 h->ref_cache[list][scan8[12]] = PART_NOT_AVAILABLE;
1085 AV_ZERO32(h->mv_cache [list][scan8[4 ]]);
1086 AV_ZERO32(h->mv_cache [list][scan8[12]]);
1089 /* XXX beurk, Load mvd */
1090 if(USES_LIST(top_type, list)){
1091 const int b_xy= h->mb2br_xy[top_xy];
1092 AV_COPY64(h->mvd_cache[list][scan8[0] + 0 - 1*8], h->mvd_table[list][b_xy + 0]);
1094 AV_ZERO64(h->mvd_cache[list][scan8[0] + 0 - 1*8]);
1096 if(USES_LIST(left_type[0], list)){
1097 const int b_xy= h->mb2br_xy[left_xy[0]] + 6;
1098 AV_COPY16(h->mvd_cache[list][scan8[0] - 1 + 0*8], h->mvd_table[list][b_xy - left_block[0]]);
1099 AV_COPY16(h->mvd_cache[list][scan8[0] - 1 + 1*8], h->mvd_table[list][b_xy - left_block[1]]);
1101 AV_ZERO16(h->mvd_cache [list][scan8[0] - 1 + 0*8]);
1102 AV_ZERO16(h->mvd_cache [list][scan8[0] - 1 + 1*8]);
1104 if(USES_LIST(left_type[1], list)){
1105 const int b_xy= h->mb2br_xy[left_xy[1]] + 6;
1106 AV_COPY16(h->mvd_cache[list][scan8[0] - 1 + 2*8], h->mvd_table[list][b_xy - left_block[2]]);
1107 AV_COPY16(h->mvd_cache[list][scan8[0] - 1 + 3*8], h->mvd_table[list][b_xy - left_block[3]]);
1109 AV_ZERO16(h->mvd_cache [list][scan8[0] - 1 + 2*8]);
1110 AV_ZERO16(h->mvd_cache [list][scan8[0] - 1 + 3*8]);
1112 AV_ZERO16(h->mvd_cache [list][scan8[4 ]]);
1113 AV_ZERO16(h->mvd_cache [list][scan8[12]]);
1114 if(h->slice_type_nos == AV_PICTURE_TYPE_B){
1115 fill_rectangle(&h->direct_cache[scan8[0]], 4, 4, 8, MB_TYPE_16x16>>1, 1);
1117 if(IS_DIRECT(top_type)){
1118 AV_WN32A(&h->direct_cache[scan8[0] - 1*8], 0x01010101u*(MB_TYPE_DIRECT2>>1));
1119 }else if(IS_8X8(top_type)){
1120 int b8_xy = 4*top_xy;
1121 h->direct_cache[scan8[0] + 0 - 1*8]= h->direct_table[b8_xy + 2];
1122 h->direct_cache[scan8[0] + 2 - 1*8]= h->direct_table[b8_xy + 3];
1124 AV_WN32A(&h->direct_cache[scan8[0] - 1*8], 0x01010101*(MB_TYPE_16x16>>1));
1127 if(IS_DIRECT(left_type[0]))
1128 h->direct_cache[scan8[0] - 1 + 0*8]= MB_TYPE_DIRECT2>>1;
1129 else if(IS_8X8(left_type[0]))
1130 h->direct_cache[scan8[0] - 1 + 0*8]= h->direct_table[4*left_xy[0] + 1 + (left_block[0]&~1)];
1132 h->direct_cache[scan8[0] - 1 + 0*8]= MB_TYPE_16x16>>1;
1134 if(IS_DIRECT(left_type[1]))
1135 h->direct_cache[scan8[0] - 1 + 2*8]= MB_TYPE_DIRECT2>>1;
1136 else if(IS_8X8(left_type[1]))
1137 h->direct_cache[scan8[0] - 1 + 2*8]= h->direct_table[4*left_xy[1] + 1 + (left_block[2]&~1)];
1139 h->direct_cache[scan8[0] - 1 + 2*8]= MB_TYPE_16x16>>1;
1145 MAP_F2F(scan8[0] - 1 - 1*8, topleft_type)\
1146 MAP_F2F(scan8[0] + 0 - 1*8, top_type)\
1147 MAP_F2F(scan8[0] + 1 - 1*8, top_type)\
1148 MAP_F2F(scan8[0] + 2 - 1*8, top_type)\
1149 MAP_F2F(scan8[0] + 3 - 1*8, top_type)\
1150 MAP_F2F(scan8[0] + 4 - 1*8, topright_type)\
1151 MAP_F2F(scan8[0] - 1 + 0*8, left_type[0])\
1152 MAP_F2F(scan8[0] - 1 + 1*8, left_type[0])\
1153 MAP_F2F(scan8[0] - 1 + 2*8, left_type[1])\
1154 MAP_F2F(scan8[0] - 1 + 3*8, left_type[1])
1156 #define MAP_F2F(idx, mb_type)\
1157 if(!IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
1158 h->ref_cache[list][idx] <<= 1;\
1159 h->mv_cache[list][idx][1] /= 2;\
1160 h->mvd_cache[list][idx][1] >>=1;\
1165 #define MAP_F2F(idx, mb_type)\
1166 if(IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
1167 h->ref_cache[list][idx] >>= 1;\
1168 h->mv_cache[list][idx][1] <<= 1;\
1169 h->mvd_cache[list][idx][1] <<= 1;\
1178 h->neighbor_transform_size= !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[0]);
1182 * gets the predicted intra4x4 prediction mode.
1184 static inline int pred_intra_mode(H264Context *h, int n){
1185 const int index8= scan8[n];
1186 const int left= h->intra4x4_pred_mode_cache[index8 - 1];
1187 const int top = h->intra4x4_pred_mode_cache[index8 - 8];
1188 const int min= FFMIN(left, top);
1190 tprintf(h->s.avctx, "mode:%d %d min:%d\n", left ,top, min);
1192 if(min<0) return DC_PRED;
1196 static inline void write_back_non_zero_count(H264Context *h){
1197 const int mb_xy= h->mb_xy;
1199 AV_COPY64(&h->non_zero_count[mb_xy][ 0], &h->non_zero_count_cache[0+8*1]);
1200 AV_COPY64(&h->non_zero_count[mb_xy][ 8], &h->non_zero_count_cache[0+8*2]);
1201 AV_COPY32(&h->non_zero_count[mb_xy][16], &h->non_zero_count_cache[0+8*5]);
1202 AV_COPY32(&h->non_zero_count[mb_xy][20], &h->non_zero_count_cache[4+8*3]);
1203 AV_COPY64(&h->non_zero_count[mb_xy][24], &h->non_zero_count_cache[0+8*4]);
1206 static inline void write_back_motion(H264Context *h, int mb_type){
1207 MpegEncContext * const s = &h->s;
1208 const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride; //try mb2b(8)_xy
1209 const int b8_xy= 4*h->mb_xy;
1212 if(!USES_LIST(mb_type, 0))
1213 fill_rectangle(&s->current_picture.ref_index[0][b8_xy], 2, 2, 2, (uint8_t)LIST_NOT_USED, 1);
1215 for(list=0; list<h->list_count; list++){
1217 int16_t (*mv_dst)[2];
1218 int16_t (*mv_src)[2];
1220 if(!USES_LIST(mb_type, list))
1223 b_stride = h->b_stride;
1224 mv_dst = &s->current_picture.motion_val[list][b_xy];
1225 mv_src = &h->mv_cache[list][scan8[0]];
1227 AV_COPY128(mv_dst + y*b_stride, mv_src + 8*y);
1230 uint8_t (*mvd_dst)[2] = &h->mvd_table[list][FMO ? 8*h->mb_xy : h->mb2br_xy[h->mb_xy]];
1231 uint8_t (*mvd_src)[2] = &h->mvd_cache[list][scan8[0]];
1232 if(IS_SKIP(mb_type))
1233 AV_ZERO128(mvd_dst);
1235 AV_COPY64(mvd_dst, mvd_src + 8*3);
1236 AV_COPY16(mvd_dst + 3 + 3, mvd_src + 3 + 8*0);
1237 AV_COPY16(mvd_dst + 3 + 2, mvd_src + 3 + 8*1);
1238 AV_COPY16(mvd_dst + 3 + 1, mvd_src + 3 + 8*2);
1243 int8_t *ref_index = &s->current_picture.ref_index[list][b8_xy];
1244 ref_index[0+0*2]= h->ref_cache[list][scan8[0]];
1245 ref_index[1+0*2]= h->ref_cache[list][scan8[4]];
1246 ref_index[0+1*2]= h->ref_cache[list][scan8[8]];
1247 ref_index[1+1*2]= h->ref_cache[list][scan8[12]];
1251 if(h->slice_type_nos == AV_PICTURE_TYPE_B && CABAC){
1252 if(IS_8X8(mb_type)){
1253 uint8_t *direct_table = &h->direct_table[4*h->mb_xy];
1254 direct_table[1] = h->sub_mb_type[1]>>1;
1255 direct_table[2] = h->sub_mb_type[2]>>1;
1256 direct_table[3] = h->sub_mb_type[3]>>1;
1261 static inline int get_dct8x8_allowed(H264Context *h){
1262 if(h->sps.direct_8x8_inference_flag)
1263 return !(AV_RN64A(h->sub_mb_type) & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8 )*0x0001000100010001ULL));
1265 return !(AV_RN64A(h->sub_mb_type) & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8|MB_TYPE_DIRECT2)*0x0001000100010001ULL));
1269 * decodes a P_SKIP or B_SKIP macroblock
1271 static void av_unused decode_mb_skip(H264Context *h){
1272 MpegEncContext * const s = &h->s;
1273 const int mb_xy= h->mb_xy;
1276 memset(h->non_zero_count[mb_xy], 0, 32);
1277 memset(h->non_zero_count_cache + 8, 0, 8*5); //FIXME ugly, remove pfui
1280 mb_type|= MB_TYPE_INTERLACED;
1282 if( h->slice_type_nos == AV_PICTURE_TYPE_B )
1284 // just for fill_caches. pred_direct_motion will set the real mb_type
1285 mb_type|= MB_TYPE_L0L1|MB_TYPE_DIRECT2|MB_TYPE_SKIP;
1286 if(h->direct_spatial_mv_pred){
1287 fill_decode_neighbors(h, mb_type);
1288 fill_decode_caches(h, mb_type); //FIXME check what is needed and what not ...
1290 ff_h264_pred_direct_motion(h, &mb_type);
1291 mb_type|= MB_TYPE_SKIP;
1296 mb_type|= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P1L0|MB_TYPE_SKIP;
1298 fill_decode_neighbors(h, mb_type);
1299 fill_decode_caches(h, mb_type); //FIXME check what is needed and what not ...
1300 pred_pskip_motion(h, &mx, &my);
1301 fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, 0, 1);
1302 fill_rectangle( h->mv_cache[0][scan8[0]], 4, 4, 8, pack16to32(mx,my), 4);
1305 write_back_motion(h, mb_type);
1306 s->current_picture.mb_type[mb_xy]= mb_type;
1307 s->current_picture.qscale_table[mb_xy]= s->qscale;
1308 h->slice_table[ mb_xy ]= h->slice_num;
1309 h->prev_mb_skipped= 1;
1312 #include "h264_mvpred.h" //For pred_pskip_motion()
1314 #endif /* AVCODEC_H264_H */