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
23 * @file libavcodec/h264.h
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"
36 #include "rectangle.h"
38 #define interlaced_dct interlaced_dct_is_a_bad_name
39 #define mb_intra mb_intra_is_not_initialized_see_mb_type
41 #define LUMA_DC_BLOCK_INDEX 25
42 #define CHROMA_DC_BLOCK_INDEX 26
44 #define CHROMA_DC_COEFF_TOKEN_VLC_BITS 8
45 #define COEFF_TOKEN_VLC_BITS 8
46 #define TOTAL_ZEROS_VLC_BITS 9
47 #define CHROMA_DC_TOTAL_ZEROS_VLC_BITS 3
48 #define RUN_VLC_BITS 3
49 #define RUN7_VLC_BITS 6
51 #define MAX_SPS_COUNT 32
52 #define MAX_PPS_COUNT 256
54 #define MAX_MMCO_COUNT 66
56 #define MAX_DELAYED_PIC_COUNT 16
58 /* Compiling in interlaced support reduces the speed
59 * of progressive decoding by about 2%. */
60 #define ALLOW_INTERLACE
62 #define ALLOW_NOCHROMA
67 * The maximum number of slices supported by the decoder.
68 * must be a power of 2
72 #ifdef ALLOW_INTERLACE
73 #define MB_MBAFF h->mb_mbaff
74 #define MB_FIELD h->mb_field_decoding_flag
75 #define FRAME_MBAFF h->mb_aff_frame
76 #define FIELD_PICTURE (s->picture_structure != PICT_FRAME)
81 #define FIELD_PICTURE 0
83 #define IS_INTERLACED(mb_type) 0
85 #define FIELD_OR_MBAFF_PICTURE (FRAME_MBAFF || FIELD_PICTURE)
88 #define CHROMA h->sps.chroma_format_idc
94 #define CABAC h->pps.cabac
97 #define EXTENDED_SAR 255
99 #define MB_TYPE_REF0 MB_TYPE_ACPRED //dirty but it fits in 16 bit
100 #define MB_TYPE_8x8DCT 0x01000000
101 #define IS_REF0(a) ((a) & MB_TYPE_REF0)
102 #define IS_8x8DCT(a) ((a) & MB_TYPE_8x8DCT)
105 * Value of Picture.reference when Picture is not a reference picture, but
106 * is held for delayed output.
108 #define DELAYED_PIC_REF 4
126 NAL_AUXILIARY_SLICE=19
133 SEI_BUFFERING_PERIOD = 0, ///< buffering period (H.264, D.1.1)
134 SEI_TYPE_PIC_TIMING = 1, ///< picture timing
135 SEI_TYPE_USER_DATA_UNREGISTERED = 5, ///< unregistered user data
136 SEI_TYPE_RECOVERY_POINT = 6 ///< recovery point (frame # to decoder sync)
140 * pic_struct in picture timing SEI message
143 SEI_PIC_STRUCT_FRAME = 0, ///< 0: %frame
144 SEI_PIC_STRUCT_TOP_FIELD = 1, ///< 1: top field
145 SEI_PIC_STRUCT_BOTTOM_FIELD = 2, ///< 2: bottom field
146 SEI_PIC_STRUCT_TOP_BOTTOM = 3, ///< 3: top field, bottom field, in that order
147 SEI_PIC_STRUCT_BOTTOM_TOP = 4, ///< 4: bottom field, top field, in that order
148 SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, ///< 5: top field, bottom field, top field repeated, in that order
149 SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///< 6: bottom field, top field, bottom field repeated, in that order
150 SEI_PIC_STRUCT_FRAME_DOUBLING = 7, ///< 7: %frame doubling
151 SEI_PIC_STRUCT_FRAME_TRIPLING = 8 ///< 8: %frame tripling
155 * Sequence parameter set
161 int chroma_format_idc;
162 int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag
163 int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4
164 int poc_type; ///< pic_order_cnt_type
165 int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4
166 int delta_pic_order_always_zero_flag;
167 int offset_for_non_ref_pic;
168 int offset_for_top_to_bottom_field;
169 int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle
170 int ref_frame_count; ///< num_ref_frames
171 int gaps_in_frame_num_allowed_flag;
172 int mb_width; ///< pic_width_in_mbs_minus1 + 1
173 int mb_height; ///< pic_height_in_map_units_minus1 + 1
174 int frame_mbs_only_flag;
175 int mb_aff; ///<mb_adaptive_frame_field_flag
176 int direct_8x8_inference_flag;
177 int crop; ///< frame_cropping_flag
178 unsigned int crop_left; ///< frame_cropping_rect_left_offset
179 unsigned int crop_right; ///< frame_cropping_rect_right_offset
180 unsigned int crop_top; ///< frame_cropping_rect_top_offset
181 unsigned int crop_bottom; ///< frame_cropping_rect_bottom_offset
182 int vui_parameters_present_flag;
184 int video_signal_type_present_flag;
186 int colour_description_present_flag;
187 enum AVColorPrimaries color_primaries;
188 enum AVColorTransferCharacteristic color_trc;
189 enum AVColorSpace colorspace;
190 int timing_info_present_flag;
191 uint32_t num_units_in_tick;
193 int fixed_frame_rate_flag;
194 short offset_for_ref_frame[256]; //FIXME dyn aloc?
195 int bitstream_restriction_flag;
196 int num_reorder_frames;
197 int scaling_matrix_present;
198 uint8_t scaling_matrix4[6][16];
199 uint8_t scaling_matrix8[2][64];
200 int nal_hrd_parameters_present_flag;
201 int vcl_hrd_parameters_present_flag;
202 int pic_struct_present_flag;
203 int time_offset_length;
204 int cpb_cnt; ///< See H.264 E.1.2
205 int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 +1
206 int cpb_removal_delay_length; ///< cpb_removal_delay_length_minus1 + 1
207 int dpb_output_delay_length; ///< dpb_output_delay_length_minus1 + 1
208 int bit_depth_luma; ///< bit_depth_luma_minus8 + 8
209 int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8
210 int residual_color_transform_flag; ///< residual_colour_transform_flag
214 * Picture parameter set
218 int cabac; ///< entropy_coding_mode_flag
219 int pic_order_present; ///< pic_order_present_flag
220 int slice_group_count; ///< num_slice_groups_minus1 + 1
221 int mb_slice_group_map_type;
222 unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1
223 int weighted_pred; ///< weighted_pred_flag
224 int weighted_bipred_idc;
225 int init_qp; ///< pic_init_qp_minus26 + 26
226 int init_qs; ///< pic_init_qs_minus26 + 26
227 int chroma_qp_index_offset[2];
228 int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
229 int constrained_intra_pred; ///< constrained_intra_pred_flag
230 int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
231 int transform_8x8_mode; ///< transform_8x8_mode_flag
232 uint8_t scaling_matrix4[6][16];
233 uint8_t scaling_matrix8[2][64];
234 uint8_t chroma_qp_table[2][64]; ///< pre-scaled (with chroma_qp_index_offset) version of qp_table
239 * Memory management control operation opcode.
241 typedef enum MMCOOpcode{
252 * Memory management control operation.
256 int short_pic_num; ///< pic_num without wrapping (pic_num & max_pic_num)
257 int long_arg; ///< index, pic_num, or num long refs depending on opcode
263 typedef struct H264Context{
267 uint8_t *rbsp_buffer[2];
268 unsigned int rbsp_buffer_size[2];
271 * Used to parse AVC variant of h264
273 int is_avc; ///< this flag is != 0 if codec is avc1
274 int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
276 int chroma_qp[2]; //QPc
278 int qp_thresh; ///< QP threshold to skip loopfilter
284 int chroma_pred_mode;
285 int intra16x16_pred_mode;
297 const uint8_t * left_block;
298 int topleft_partition;
300 int8_t intra4x4_pred_mode_cache[5*8];
301 int8_t (*intra4x4_pred_mode);
303 unsigned int topleft_samples_available;
304 unsigned int top_samples_available;
305 unsigned int topright_samples_available;
306 unsigned int left_samples_available;
307 uint8_t (*top_borders[2])[16+2*8];
308 uint8_t left_border[2*(17+2*9)];
311 * non zero coeff count cache.
312 * is 64 if not available.
314 DECLARE_ALIGNED_8(uint8_t, non_zero_count_cache)[6*8];
322 uint8_t (*non_zero_count)[32];
325 * Motion vector cache.
327 DECLARE_ALIGNED_16(int16_t, mv_cache)[2][5*8][2];
328 DECLARE_ALIGNED_8(int8_t, ref_cache)[2][5*8];
329 #define LIST_NOT_USED -1 //FIXME rename?
330 #define PART_NOT_AVAILABLE -2
333 * is 1 if the specific list MV&references are set to 0,0,-2.
335 int mv_cache_clean[2];
338 * number of neighbors (top and/or left) that used 8x8 dct
340 int neighbor_transform_size;
343 * block_offset[ 0..23] for frame macroblocks
344 * block_offset[24..47] for field macroblocks
346 int block_offset[2*(16+8)];
348 uint32_t *mb2b_xy; //FIXME are these 4 a good idea?
350 int b_stride; //FIXME use s->b4_stride
352 int mb_linesize; ///< may be equal to s->linesize or s->linesize*2, for mbaff
361 int unknown_svq3_flag;
362 int next_slice_index;
364 SPS *sps_buffers[MAX_SPS_COUNT];
365 SPS sps; ///< current sps
367 PPS *pps_buffers[MAX_PPS_COUNT];
371 PPS pps; //FIXME move to Picture perhaps? (->no) do we need that?
373 uint32_t dequant4_buffer[6][52][16];
374 uint32_t dequant8_buffer[2][52][64];
375 uint32_t (*dequant4_coeff[6])[16];
376 uint32_t (*dequant8_coeff[2])[64];
377 int dequant_coeff_pps; ///< reinit tables when pps changes
380 uint16_t *slice_table_base;
381 uint16_t *slice_table; ///< slice_table_base + 2*mb_stride + 1
383 int slice_type_nos; ///< S free slice type (SI/SP are remapped to I/P)
384 int slice_type_fixed;
386 //interlacing specific flags
388 int mb_field_decoding_flag;
389 int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag
391 DECLARE_ALIGNED_8(uint16_t, sub_mb_type)[4];
396 int delta_poc_bottom;
399 int prev_poc_msb; ///< poc_msb of the last reference pic for POC type 0
400 int prev_poc_lsb; ///< poc_lsb of the last reference pic for POC type 0
401 int frame_num_offset; ///< for POC type 2
402 int prev_frame_num_offset; ///< for POC type 2
403 int prev_frame_num; ///< frame_num of the last pic for POC type 1/2
406 * frame_num for frames or 2*frame_num+1 for field pics.
411 * max_frame_num or 2*max_frame_num for field pics.
415 //Weighted pred stuff
417 int use_weight_chroma;
418 int luma_log2_weight_denom;
419 int chroma_log2_weight_denom;
420 int luma_weight[2][48];
421 int luma_offset[2][48];
422 int chroma_weight[2][48][2];
423 int chroma_offset[2][48][2];
424 int implicit_weight[48][48];
427 int deblocking_filter; ///< disable_deblocking_filter_idc with 1<->0
428 int slice_alpha_c0_offset;
429 int slice_beta_offset;
431 int redundant_pic_count;
433 int direct_spatial_mv_pred;
436 int dist_scale_factor[16];
437 int dist_scale_factor_field[2][32];
438 int map_col_to_list0[2][16+32];
439 int map_col_to_list0_field[2][2][16+32];
442 * num_ref_idx_l0/1_active_minus1 + 1
444 unsigned int ref_count[2]; ///< counts frames or fields, depending on current mb mode
445 unsigned int list_count;
446 uint8_t *list_counts; ///< Array of list_count per MB specifying the slice type
447 Picture *short_ref[32];
448 Picture *long_ref[32];
449 Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
450 Picture ref_list[2][48]; /**< 0..15: frame refs, 16..47: mbaff field refs.
451 Reordered version of default_ref_list
452 according to picture reordering in slice header */
453 int ref2frm[MAX_SLICES][2][64]; ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
454 Picture *delayed_pic[MAX_DELAYED_PIC_COUNT+2]; //FIXME size?
458 * memory management control operations buffer.
460 MMCO mmco[MAX_MMCO_COUNT];
463 int long_ref_count; ///< number of actual long term references
464 int short_ref_count; ///< number of actual short term references
467 GetBitContext intra_gb;
468 GetBitContext inter_gb;
469 GetBitContext *intra_gb_ptr;
470 GetBitContext *inter_gb_ptr;
472 DECLARE_ALIGNED_16(DCTELEM, mb)[16*24];
473 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
479 uint8_t cabac_state[460];
482 /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0,1,2), 0x0? luma_cbp */
487 /* chroma_pred_mode for i4x4 or i16x16, else 0 */
488 uint8_t *chroma_pred_mode_table;
489 int last_qscale_diff;
490 uint8_t (*mvd_table[2])[2];
491 DECLARE_ALIGNED_16(uint8_t, mvd_cache)[2][5*8][2];
492 uint8_t *direct_table;
493 uint8_t direct_cache[5*8];
495 uint8_t zigzag_scan[16];
496 uint8_t zigzag_scan8x8[64];
497 uint8_t zigzag_scan8x8_cavlc[64];
498 uint8_t field_scan[16];
499 uint8_t field_scan8x8[64];
500 uint8_t field_scan8x8_cavlc[64];
501 const uint8_t *zigzag_scan_q0;
502 const uint8_t *zigzag_scan8x8_q0;
503 const uint8_t *zigzag_scan8x8_cavlc_q0;
504 const uint8_t *field_scan_q0;
505 const uint8_t *field_scan8x8_q0;
506 const uint8_t *field_scan8x8_cavlc_q0;
511 * @defgroup multithreading Members for slice based multithreading
514 struct H264Context *thread_context[MAX_THREADS];
517 * current slice number, used to initalize slice_num of each thread/context
522 * Max number of threads / contexts.
523 * This is equal to AVCodecContext.thread_count unless
524 * multithreaded decoding is impossible, in which case it is
530 * 1 if the single thread fallback warning has already been
531 * displayed, 0 otherwise.
533 int single_decode_warning;
540 uint32_t svq3_watermark_key;
543 * pic_struct in picture timing SEI message
545 SEI_PicStructType sei_pic_struct;
548 * Complement sei_pic_struct
549 * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
550 * However, soft telecined frames may have these values.
551 * This is used in an attempt to flag soft telecine progressive.
553 int prev_interlaced_frame;
556 * Bit set of clock types for fields/frames in picture timing SEI message.
557 * For each found ct_type, appropriate bit is set (e.g., bit 1 for
563 * dpb_output_delay in picture timing SEI message, see H.264 C.2.2
565 int sei_dpb_output_delay;
568 * cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
570 int sei_cpb_removal_delay;
573 * recovery_frame_cnt from SEI message
575 * Set to -1 if no recovery point SEI message found or to number of frames
576 * before playback synchronizes. Frames having recovery point are key
579 int sei_recovery_frame_cnt;
583 int luma_weight_flag[2]; ///< 7.4.3.2 luma_weight_lX_flag
584 int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
587 int sei_buffering_period_present; ///< Buffering period SEI flag
588 int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
592 extern const uint8_t ff_h264_chroma_qp[52];
594 void ff_svq3_luma_dc_dequant_idct_c(DCTELEM *block, int qp);
596 void ff_svq3_add_idct_c(uint8_t *dst, DCTELEM *block, int stride, int qp, int dc);
601 int ff_h264_decode_sei(H264Context *h);
606 int ff_h264_decode_seq_parameter_set(H264Context *h);
611 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length);
614 * Decodes a network abstraction layer unit.
615 * @param consumed is the number of bytes used as input
616 * @param length is the length of the array
617 * @param dst_length is the number of decoded bytes FIXME here or a decode rbsp tailing?
618 * @returns decoded bytes, might be src+1 if no escapes
620 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src, int *dst_length, int *consumed, int length);
623 * identifies the exact end of the bitstream
624 * @return the length of the trailing, or 0 if damaged
626 int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src);
629 * frees any data that may have been allocated in the H264 context like SPS, PPS etc.
631 av_cold void ff_h264_free_context(H264Context *h);
634 * reconstructs bitstream slice_type.
636 int ff_h264_get_slice_type(const H264Context *h);
642 int ff_h264_alloc_tables(H264Context *h);
645 * fills the default_ref_list.
647 int ff_h264_fill_default_ref_list(H264Context *h);
649 int ff_h264_decode_ref_pic_list_reordering(H264Context *h);
650 void ff_h264_fill_mbaff_ref_list(H264Context *h);
651 void ff_h264_remove_all_refs(H264Context *h);
654 * Executes the reference picture marking (memory management control operations).
656 int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count);
658 int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb);
662 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
664 int ff_h264_check_intra4x4_pred_mode(H264Context *h);
667 * checks if the top & left blocks are available if needed & changes the dc mode so it only uses the available blocks.
669 int ff_h264_check_intra_pred_mode(H264Context *h, int mode);
671 void ff_h264_write_back_intra_pred_mode(H264Context *h);
672 void ff_h264_hl_decode_mb(H264Context *h);
673 int ff_h264_frame_start(H264Context *h);
674 av_cold int ff_h264_decode_init(AVCodecContext *avctx);
675 av_cold int ff_h264_decode_end(AVCodecContext *avctx);
676 av_cold void ff_h264_decode_init_vlc(void);
679 * decodes a macroblock
680 * @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
682 int ff_h264_decode_mb_cavlc(H264Context *h);
685 * decodes a CABAC coded macroblock
686 * @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
688 int ff_h264_decode_mb_cabac(H264Context *h);
690 void ff_h264_init_cabac_states(H264Context *h);
692 void ff_h264_direct_dist_scale_factor(H264Context * const h);
693 void ff_h264_direct_ref_list_init(H264Context * const h);
694 void ff_h264_pred_direct_motion(H264Context * const h, int *mb_type);
696 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);
697 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);
700 * Reset SEI values at the beginning of the frame.
702 * @param h H.264 context.
704 void ff_h264_reset_sei(H264Context *h);
716 //This table must be here because scan8[constant] must be known at compiletime
717 static const uint8_t scan8[16 + 2*4]={
718 4+1*8, 5+1*8, 4+2*8, 5+2*8,
719 6+1*8, 7+1*8, 6+2*8, 7+2*8,
720 4+3*8, 5+3*8, 4+4*8, 5+4*8,
721 6+3*8, 7+3*8, 6+4*8, 7+4*8,
728 static av_always_inline uint32_t pack16to32(int a, int b){
730 return (b&0xFFFF) + (a<<16);
732 return (a&0xFFFF) + (b<<16);
736 static av_always_inline uint16_t pack8to16(int a, int b){
738 return (b&0xFF) + (a<<8);
740 return (a&0xFF) + (b<<8);
745 * gets the chroma qp.
747 static inline int get_chroma_qp(H264Context *h, int t, int qscale){
748 return h->pps.chroma_qp_table[t][qscale];
751 static inline void pred_pskip_motion(H264Context * const h, int * const mx, int * const my);
753 static void fill_decode_neighbors(H264Context *h, int mb_type){
754 MpegEncContext * const s = &h->s;
755 const int mb_xy= h->mb_xy;
756 int topleft_xy, top_xy, topright_xy, left_xy[2];
757 static const uint8_t left_block_options[4][16]={
758 {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},
759 {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},
760 {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},
761 {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}
764 h->topleft_partition= -1;
766 top_xy = mb_xy - (s->mb_stride << MB_FIELD);
768 /* Wow, what a mess, why didn't they simplify the interlacing & intra
769 * stuff, I can't imagine that these complex rules are worth it. */
771 topleft_xy = top_xy - 1;
772 topright_xy= top_xy + 1;
773 left_xy[1] = left_xy[0] = mb_xy-1;
774 h->left_block = left_block_options[0];
776 const int left_mb_field_flag = IS_INTERLACED(s->current_picture.mb_type[mb_xy-1]);
777 const int curr_mb_field_flag = IS_INTERLACED(mb_type);
779 if (left_mb_field_flag != curr_mb_field_flag) {
780 left_xy[1] = left_xy[0] = mb_xy - s->mb_stride - 1;
781 if (curr_mb_field_flag) {
782 left_xy[1] += s->mb_stride;
783 h->left_block = left_block_options[3];
785 topleft_xy += s->mb_stride;
786 // take top left mv from the middle of the mb, as opposed to all other modes which use the bottom right partition
787 h->topleft_partition = 0;
788 h->left_block = left_block_options[1];
792 if(curr_mb_field_flag){
793 topleft_xy += s->mb_stride & (((s->current_picture.mb_type[top_xy - 1]>>7)&1)-1);
794 topright_xy += s->mb_stride & (((s->current_picture.mb_type[top_xy + 1]>>7)&1)-1);
795 top_xy += s->mb_stride & (((s->current_picture.mb_type[top_xy ]>>7)&1)-1);
797 if (left_mb_field_flag != curr_mb_field_flag) {
798 if (curr_mb_field_flag) {
799 left_xy[1] += s->mb_stride;
800 h->left_block = left_block_options[3];
802 h->left_block = left_block_options[2];
808 h->topleft_mb_xy = topleft_xy;
809 h->top_mb_xy = top_xy;
810 h->topright_mb_xy= topright_xy;
811 h->left_mb_xy[0] = left_xy[0];
812 h->left_mb_xy[1] = left_xy[1];
813 //FIXME do we need all in the context?
814 h->topleft_type = h->slice_table[topleft_xy ] == h->slice_num ? s->current_picture.mb_type[topleft_xy] : 0;
815 h->top_type = h->slice_table[top_xy ] == h->slice_num ? s->current_picture.mb_type[top_xy] : 0;
816 h->topright_type= h->slice_table[topright_xy] == h->slice_num ? s->current_picture.mb_type[topright_xy]: 0;
817 h->left_type[0] = h->slice_table[left_xy[0] ] == h->slice_num ? s->current_picture.mb_type[left_xy[0]] : 0;
818 h->left_type[1] = h->slice_table[left_xy[1] ] == h->slice_num ? s->current_picture.mb_type[left_xy[1]] : 0;
821 static void fill_decode_caches(H264Context *h, int mb_type){
822 MpegEncContext * const s = &h->s;
823 int topleft_xy, top_xy, topright_xy, left_xy[2];
824 int topleft_type, top_type, topright_type, left_type[2];
825 const uint8_t * left_block= h->left_block;
828 topleft_xy = h->topleft_mb_xy ;
829 top_xy = h->top_mb_xy ;
830 topright_xy = h->topright_mb_xy;
831 left_xy[0] = h->left_mb_xy[0] ;
832 left_xy[1] = h->left_mb_xy[1] ;
833 topleft_type = h->topleft_type ;
834 top_type = h->top_type ;
835 topright_type= h->topright_type ;
836 left_type[0] = h->left_type[0] ;
837 left_type[1] = h->left_type[1] ;
839 if(!IS_SKIP(mb_type)){
840 if(IS_INTRA(mb_type)){
841 int type_mask= h->pps.constrained_intra_pred ? IS_INTRA(-1) : -1;
842 h->topleft_samples_available=
843 h->top_samples_available=
844 h->left_samples_available= 0xFFFF;
845 h->topright_samples_available= 0xEEEA;
847 if(!(top_type & type_mask)){
848 h->topleft_samples_available= 0xB3FF;
849 h->top_samples_available= 0x33FF;
850 h->topright_samples_available= 0x26EA;
852 if(IS_INTERLACED(mb_type) != IS_INTERLACED(left_type[0])){
853 if(IS_INTERLACED(mb_type)){
854 if(!(left_type[0] & type_mask)){
855 h->topleft_samples_available&= 0xDFFF;
856 h->left_samples_available&= 0x5FFF;
858 if(!(left_type[1] & type_mask)){
859 h->topleft_samples_available&= 0xFF5F;
860 h->left_samples_available&= 0xFF5F;
863 int left_typei = s->current_picture.mb_type[left_xy[0] + s->mb_stride];
865 assert(left_xy[0] == left_xy[1]);
866 if(!((left_typei & type_mask) && (left_type[0] & type_mask))){
867 h->topleft_samples_available&= 0xDF5F;
868 h->left_samples_available&= 0x5F5F;
872 if(!(left_type[0] & type_mask)){
873 h->topleft_samples_available&= 0xDF5F;
874 h->left_samples_available&= 0x5F5F;
878 if(!(topleft_type & type_mask))
879 h->topleft_samples_available&= 0x7FFF;
881 if(!(topright_type & type_mask))
882 h->topright_samples_available&= 0xFBFF;
884 if(IS_INTRA4x4(mb_type)){
885 if(IS_INTRA4x4(top_type)){
886 AV_COPY32(h->intra4x4_pred_mode_cache+4+8*0, h->intra4x4_pred_mode + h->mb2br_xy[top_xy]);
888 h->intra4x4_pred_mode_cache[4+8*0]=
889 h->intra4x4_pred_mode_cache[5+8*0]=
890 h->intra4x4_pred_mode_cache[6+8*0]=
891 h->intra4x4_pred_mode_cache[7+8*0]= 2 - 3*!(top_type & type_mask);
894 if(IS_INTRA4x4(left_type[i])){
895 int8_t *mode= h->intra4x4_pred_mode + h->mb2br_xy[left_xy[i]];
896 h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]= mode[6-left_block[0+2*i]];
897 h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= mode[6-left_block[1+2*i]];
899 h->intra4x4_pred_mode_cache[3+8*1 + 2*8*i]=
900 h->intra4x4_pred_mode_cache[3+8*2 + 2*8*i]= 2 - 3*!(left_type[i] & type_mask);
915 //FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
917 AV_COPY32(&h->non_zero_count_cache[4+8*0], &h->non_zero_count[top_xy][4+3*8]);
918 h->non_zero_count_cache[1+8*0]= h->non_zero_count[top_xy][1+1*8];
919 h->non_zero_count_cache[2+8*0]= h->non_zero_count[top_xy][2+1*8];
921 h->non_zero_count_cache[1+8*3]= h->non_zero_count[top_xy][1+2*8];
922 h->non_zero_count_cache[2+8*3]= h->non_zero_count[top_xy][2+2*8];
924 h->non_zero_count_cache[1+8*0]=
925 h->non_zero_count_cache[2+8*0]=
927 h->non_zero_count_cache[1+8*3]=
928 h->non_zero_count_cache[2+8*3]=
929 AV_WN32A(&h->non_zero_count_cache[4+8*0], CABAC && !IS_INTRA(mb_type) ? 0 : 0x40404040);
932 for (i=0; i<2; i++) {
934 h->non_zero_count_cache[3+8*1 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[8+0+2*i]];
935 h->non_zero_count_cache[3+8*2 + 2*8*i]= h->non_zero_count[left_xy[i]][left_block[8+1+2*i]];
936 h->non_zero_count_cache[0+8*1 + 8*i]= h->non_zero_count[left_xy[i]][left_block[8+4+2*i]];
937 h->non_zero_count_cache[0+8*4 + 8*i]= h->non_zero_count[left_xy[i]][left_block[8+5+2*i]];
939 h->non_zero_count_cache[3+8*1 + 2*8*i]=
940 h->non_zero_count_cache[3+8*2 + 2*8*i]=
941 h->non_zero_count_cache[0+8*1 + 8*i]=
942 h->non_zero_count_cache[0+8*4 + 8*i]= CABAC && !IS_INTRA(mb_type) ? 0 : 64;
949 h->top_cbp = h->cbp_table[top_xy];
950 } else if(IS_INTRA(mb_type)) {
957 h->left_cbp = h->cbp_table[left_xy[0]] & 0x1f0;
958 } else if(IS_INTRA(mb_type)) {
964 h->left_cbp |= ((h->cbp_table[left_xy[0]]>>((left_block[0]&(~1))+1))&0x1) << 1;
967 h->left_cbp |= ((h->cbp_table[left_xy[1]]>>((left_block[2]&(~1))+1))&0x1) << 3;
973 if(IS_INTER(mb_type) || (IS_DIRECT(mb_type) && h->direct_spatial_mv_pred)){
975 for(list=0; list<h->list_count; list++){
976 if(!USES_LIST(mb_type, list)){
977 /*if(!h->mv_cache_clean[list]){
978 memset(h->mv_cache [list], 0, 8*5*2*sizeof(int16_t)); //FIXME clean only input? clean at all?
979 memset(h->ref_cache[list], PART_NOT_AVAILABLE, 8*5*sizeof(int8_t));
980 h->mv_cache_clean[list]= 1;
984 assert(!(IS_DIRECT(mb_type) && !h->direct_spatial_mv_pred));
986 h->mv_cache_clean[list]= 0;
988 if(USES_LIST(top_type, list)){
989 const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
990 AV_COPY128(h->mv_cache[list][scan8[0] + 0 - 1*8], s->current_picture.motion_val[list][b_xy + 0]);
991 h->ref_cache[list][scan8[0] + 0 - 1*8]=
992 h->ref_cache[list][scan8[0] + 1 - 1*8]= s->current_picture.ref_index[list][4*top_xy + 2];
993 h->ref_cache[list][scan8[0] + 2 - 1*8]=
994 h->ref_cache[list][scan8[0] + 3 - 1*8]= s->current_picture.ref_index[list][4*top_xy + 3];
996 AV_ZERO128(h->mv_cache[list][scan8[0] + 0 - 1*8]);
997 AV_WN32A(&h->ref_cache[list][scan8[0] + 0 - 1*8], ((top_type ? LIST_NOT_USED : PART_NOT_AVAILABLE)&0xFF)*0x01010101);
1001 int cache_idx = scan8[0] - 1 + i*2*8;
1002 if(USES_LIST(left_type[i], list)){
1003 const int b_xy= h->mb2b_xy[left_xy[i]] + 3;
1004 const int b8_xy= 4*left_xy[i] + 1;
1005 AV_COPY32(h->mv_cache[list][cache_idx ], s->current_picture.motion_val[list][b_xy + h->b_stride*left_block[0+i*2]]);
1006 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]]);
1007 h->ref_cache[list][cache_idx ]= s->current_picture.ref_index[list][b8_xy + (left_block[0+i*2]&~1)];
1008 h->ref_cache[list][cache_idx+8]= s->current_picture.ref_index[list][b8_xy + (left_block[1+i*2]&~1)];
1010 AV_ZERO32(h->mv_cache [list][cache_idx ]);
1011 AV_ZERO32(h->mv_cache [list][cache_idx+8]);
1012 h->ref_cache[list][cache_idx ]=
1013 h->ref_cache[list][cache_idx+8]= (left_type[i]) ? LIST_NOT_USED : PART_NOT_AVAILABLE;
1017 if(USES_LIST(topleft_type, list)){
1018 const int b_xy = h->mb2b_xy [topleft_xy] + 3 + h->b_stride + (h->topleft_partition & 2*h->b_stride);
1019 const int b8_xy= 4*topleft_xy + 1 + (h->topleft_partition & 2);
1020 AV_COPY32(h->mv_cache[list][scan8[0] - 1 - 1*8], s->current_picture.motion_val[list][b_xy]);
1021 h->ref_cache[list][scan8[0] - 1 - 1*8]= s->current_picture.ref_index[list][b8_xy];
1023 AV_ZERO32(h->mv_cache[list][scan8[0] - 1 - 1*8]);
1024 h->ref_cache[list][scan8[0] - 1 - 1*8]= topleft_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
1027 if(USES_LIST(topright_type, list)){
1028 const int b_xy= h->mb2b_xy[topright_xy] + 3*h->b_stride;
1029 AV_COPY32(h->mv_cache[list][scan8[0] + 4 - 1*8], s->current_picture.motion_val[list][b_xy]);
1030 h->ref_cache[list][scan8[0] + 4 - 1*8]= s->current_picture.ref_index[list][4*topright_xy + 2];
1032 AV_ZERO32(h->mv_cache [list][scan8[0] + 4 - 1*8]);
1033 h->ref_cache[list][scan8[0] + 4 - 1*8]= topright_type ? LIST_NOT_USED : PART_NOT_AVAILABLE;
1036 if((mb_type&(MB_TYPE_SKIP|MB_TYPE_DIRECT2)) && !FRAME_MBAFF)
1039 if(!(mb_type&(MB_TYPE_SKIP|MB_TYPE_DIRECT2))) {
1040 h->ref_cache[list][scan8[4 ]] =
1041 h->ref_cache[list][scan8[12]] = PART_NOT_AVAILABLE;
1042 AV_ZERO32(h->mv_cache [list][scan8[4 ]]);
1043 AV_ZERO32(h->mv_cache [list][scan8[12]]);
1046 /* XXX beurk, Load mvd */
1047 if(USES_LIST(top_type, list)){
1048 const int b_xy= h->mb2br_xy[top_xy];
1049 AV_COPY64(h->mvd_cache[list][scan8[0] + 0 - 1*8], h->mvd_table[list][b_xy + 0]);
1051 AV_ZERO64(h->mvd_cache[list][scan8[0] + 0 - 1*8]);
1053 if(USES_LIST(left_type[0], list)){
1054 const int b_xy= h->mb2br_xy[left_xy[0]] + 6;
1055 AV_COPY16(h->mvd_cache[list][scan8[0] - 1 + 0*8], h->mvd_table[list][b_xy - left_block[0]]);
1056 AV_COPY16(h->mvd_cache[list][scan8[0] - 1 + 1*8], h->mvd_table[list][b_xy - left_block[1]]);
1058 AV_ZERO16(h->mvd_cache [list][scan8[0] - 1 + 0*8]);
1059 AV_ZERO16(h->mvd_cache [list][scan8[0] - 1 + 1*8]);
1061 if(USES_LIST(left_type[1], list)){
1062 const int b_xy= h->mb2br_xy[left_xy[1]] + 6;
1063 AV_COPY16(h->mvd_cache[list][scan8[0] - 1 + 2*8], h->mvd_table[list][b_xy - left_block[2]]);
1064 AV_COPY16(h->mvd_cache[list][scan8[0] - 1 + 3*8], h->mvd_table[list][b_xy - left_block[3]]);
1066 AV_ZERO16(h->mvd_cache [list][scan8[0] - 1 + 2*8]);
1067 AV_ZERO16(h->mvd_cache [list][scan8[0] - 1 + 3*8]);
1069 AV_ZERO16(h->mvd_cache [list][scan8[5 ]+1]);
1070 AV_ZERO16(h->mvd_cache [list][scan8[7 ]+1]);
1071 AV_ZERO16(h->mvd_cache [list][scan8[13]+1]); //FIXME remove past 3 (init somewhere else)
1072 AV_ZERO16(h->mvd_cache [list][scan8[4 ]]);
1073 AV_ZERO16(h->mvd_cache [list][scan8[12]]);
1074 if(h->slice_type_nos == FF_B_TYPE){
1075 fill_rectangle(&h->direct_cache[scan8[0]], 4, 4, 8, MB_TYPE_16x16>>1, 1);
1077 if(IS_DIRECT(top_type)){
1078 AV_WN32A(&h->direct_cache[scan8[0] - 1*8], 0x01010101*(MB_TYPE_DIRECT2>>1));
1079 }else if(IS_8X8(top_type)){
1080 int b8_xy = 4*top_xy;
1081 h->direct_cache[scan8[0] + 0 - 1*8]= h->direct_table[b8_xy + 2];
1082 h->direct_cache[scan8[0] + 2 - 1*8]= h->direct_table[b8_xy + 3];
1084 AV_WN32A(&h->direct_cache[scan8[0] - 1*8], 0x01010101*(MB_TYPE_16x16>>1));
1087 if(IS_DIRECT(left_type[0]))
1088 h->direct_cache[scan8[0] - 1 + 0*8]= MB_TYPE_DIRECT2>>1;
1089 else if(IS_8X8(left_type[0]))
1090 h->direct_cache[scan8[0] - 1 + 0*8]= h->direct_table[4*left_xy[0] + 1 + (left_block[0]&~1)];
1092 h->direct_cache[scan8[0] - 1 + 0*8]= MB_TYPE_16x16>>1;
1094 if(IS_DIRECT(left_type[1]))
1095 h->direct_cache[scan8[0] - 1 + 2*8]= MB_TYPE_DIRECT2>>1;
1096 else if(IS_8X8(left_type[1]))
1097 h->direct_cache[scan8[0] - 1 + 2*8]= h->direct_table[4*left_xy[1] + 1 + (left_block[2]&~1)];
1099 h->direct_cache[scan8[0] - 1 + 2*8]= MB_TYPE_16x16>>1;
1105 MAP_F2F(scan8[0] - 1 - 1*8, topleft_type)\
1106 MAP_F2F(scan8[0] + 0 - 1*8, top_type)\
1107 MAP_F2F(scan8[0] + 1 - 1*8, top_type)\
1108 MAP_F2F(scan8[0] + 2 - 1*8, top_type)\
1109 MAP_F2F(scan8[0] + 3 - 1*8, top_type)\
1110 MAP_F2F(scan8[0] + 4 - 1*8, topright_type)\
1111 MAP_F2F(scan8[0] - 1 + 0*8, left_type[0])\
1112 MAP_F2F(scan8[0] - 1 + 1*8, left_type[0])\
1113 MAP_F2F(scan8[0] - 1 + 2*8, left_type[1])\
1114 MAP_F2F(scan8[0] - 1 + 3*8, left_type[1])
1116 #define MAP_F2F(idx, mb_type)\
1117 if(!IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
1118 h->ref_cache[list][idx] <<= 1;\
1119 h->mv_cache[list][idx][1] /= 2;\
1120 h->mvd_cache[list][idx][1] >>=1;\
1125 #define MAP_F2F(idx, mb_type)\
1126 if(IS_INTERLACED(mb_type) && h->ref_cache[list][idx] >= 0){\
1127 h->ref_cache[list][idx] >>= 1;\
1128 h->mv_cache[list][idx][1] <<= 1;\
1129 h->mvd_cache[list][idx][1] <<= 1;\
1139 h->neighbor_transform_size= !!IS_8x8DCT(top_type) + !!IS_8x8DCT(left_type[0]);
1144 * @returns non zero if the loop filter can be skiped
1146 static int fill_filter_caches(H264Context *h, int mb_type){
1147 MpegEncContext * const s = &h->s;
1148 const int mb_xy= h->mb_xy;
1149 int top_xy, left_xy[2];
1150 int top_type, left_type[2];
1152 top_xy = mb_xy - (s->mb_stride << MB_FIELD);
1154 //FIXME deblocking could skip the intra and nnz parts.
1156 /* Wow, what a mess, why didn't they simplify the interlacing & intra
1157 * stuff, I can't imagine that these complex rules are worth it. */
1159 left_xy[1] = left_xy[0] = mb_xy-1;
1161 const int left_mb_field_flag = IS_INTERLACED(s->current_picture.mb_type[mb_xy-1]);
1162 const int curr_mb_field_flag = IS_INTERLACED(mb_type);
1164 if (left_mb_field_flag != curr_mb_field_flag) {
1165 left_xy[0] -= s->mb_stride;
1168 if(curr_mb_field_flag){
1169 top_xy += s->mb_stride & (((s->current_picture.mb_type[top_xy ]>>7)&1)-1);
1171 if (left_mb_field_flag != curr_mb_field_flag) {
1172 left_xy[1] += s->mb_stride;
1177 h->top_mb_xy = top_xy;
1178 h->left_mb_xy[0] = left_xy[0];
1179 h->left_mb_xy[1] = left_xy[1];
1181 //for sufficiently low qp, filtering wouldn't do anything
1182 //this is a conservative estimate: could also check beta_offset and more accurate chroma_qp
1183 int qp_thresh = h->qp_thresh; //FIXME strictly we should store qp_thresh for each mb of a slice
1184 int qp = s->current_picture.qscale_table[mb_xy];
1186 && (left_xy[0]<0 || ((qp + s->current_picture.qscale_table[left_xy[0]] + 1)>>1) <= qp_thresh)
1187 && (top_xy < 0 || ((qp + s->current_picture.qscale_table[top_xy ] + 1)>>1) <= qp_thresh)){
1190 if( (left_xy[0]< 0 || ((qp + s->current_picture.qscale_table[left_xy[1] ] + 1)>>1) <= qp_thresh)
1191 && (top_xy < s->mb_stride || ((qp + s->current_picture.qscale_table[top_xy -s->mb_stride] + 1)>>1) <= qp_thresh))
1196 if(h->deblocking_filter == 2){
1197 h->top_type = top_type = h->slice_table[top_xy ] == h->slice_num ? s->current_picture.mb_type[top_xy] : 0;
1198 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;
1199 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;
1201 h->top_type = top_type = h->slice_table[top_xy ] < 0xFFFF ? s->current_picture.mb_type[top_xy] : 0;
1202 h->left_type[0]= left_type[0] = h->slice_table[left_xy[0] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[0]] : 0;
1203 h->left_type[1]= left_type[1] = h->slice_table[left_xy[1] ] < 0xFFFF ? s->current_picture.mb_type[left_xy[1]] : 0;
1205 if(IS_INTRA(mb_type))
1208 AV_COPY64(&h->non_zero_count_cache[0+8*1], &h->non_zero_count[mb_xy][ 0]);
1209 AV_COPY64(&h->non_zero_count_cache[0+8*2], &h->non_zero_count[mb_xy][ 8]);
1210 AV_COPY32(&h->non_zero_count_cache[0+8*5], &h->non_zero_count[mb_xy][16]);
1211 AV_COPY32(&h->non_zero_count_cache[4+8*3], &h->non_zero_count[mb_xy][20]);
1212 AV_COPY64(&h->non_zero_count_cache[0+8*4], &h->non_zero_count[mb_xy][24]);
1214 h->cbp= h->cbp_table[mb_xy];
1218 for(list=0; list<h->list_count; list++){
1221 int16_t (*mv_dst)[2];
1222 int16_t (*mv_src)[2];
1224 if(!USES_LIST(mb_type, list)){
1225 fill_rectangle( h->mv_cache[list][scan8[0]], 4, 4, 8, pack16to32(0,0), 4);
1226 AV_WN32A(&h->ref_cache[list][scan8[ 0]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
1227 AV_WN32A(&h->ref_cache[list][scan8[ 2]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
1228 AV_WN32A(&h->ref_cache[list][scan8[ 8]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
1229 AV_WN32A(&h->ref_cache[list][scan8[10]], ((LIST_NOT_USED)&0xFF)*0x01010101u);
1233 ref = &s->current_picture.ref_index[list][4*mb_xy];
1235 int (*ref2frm)[64] = h->ref2frm[ h->slice_num&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
1236 AV_WN32A(&h->ref_cache[list][scan8[ 0]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
1237 AV_WN32A(&h->ref_cache[list][scan8[ 2]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
1239 AV_WN32A(&h->ref_cache[list][scan8[ 8]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
1240 AV_WN32A(&h->ref_cache[list][scan8[10]], (pack16to32(ref2frm[list][ref[0]],ref2frm[list][ref[1]])&0x00FF00FF)*0x0101);
1243 b_stride = h->b_stride;
1244 mv_dst = &h->mv_cache[list][scan8[0]];
1245 mv_src = &s->current_picture.motion_val[list][4*s->mb_x + 4*s->mb_y*b_stride];
1247 AV_COPY128(mv_dst + 8*y, mv_src + y*b_stride);
1262 //FIXME constraint_intra_pred & partitioning & nnz (let us hope this is just a typo in the spec)
1264 AV_COPY32(&h->non_zero_count_cache[4+8*0], &h->non_zero_count[top_xy][4+3*8]);
1268 h->non_zero_count_cache[3+8*1]= h->non_zero_count[left_xy[0]][7+0*8];
1269 h->non_zero_count_cache[3+8*2]= h->non_zero_count[left_xy[0]][7+1*8];
1270 h->non_zero_count_cache[3+8*3]= h->non_zero_count[left_xy[0]][7+2*8];
1271 h->non_zero_count_cache[3+8*4]= h->non_zero_count[left_xy[0]][7+3*8];
1274 // CAVLC 8x8dct requires NNZ values for residual decoding that differ from what the loop filter needs
1275 if(!CABAC && h->pps.transform_8x8_mode){
1276 if(IS_8x8DCT(top_type)){
1277 h->non_zero_count_cache[4+8*0]=
1278 h->non_zero_count_cache[5+8*0]= h->cbp_table[top_xy] & 4;
1279 h->non_zero_count_cache[6+8*0]=
1280 h->non_zero_count_cache[7+8*0]= h->cbp_table[top_xy] & 8;
1282 if(IS_8x8DCT(left_type[0])){
1283 h->non_zero_count_cache[3+8*1]=
1284 h->non_zero_count_cache[3+8*2]= h->cbp_table[left_xy[0]]&2; //FIXME check MBAFF
1286 if(IS_8x8DCT(left_type[1])){
1287 h->non_zero_count_cache[3+8*3]=
1288 h->non_zero_count_cache[3+8*4]= h->cbp_table[left_xy[1]]&8; //FIXME check MBAFF
1291 if(IS_8x8DCT(mb_type)){
1292 h->non_zero_count_cache[scan8[0 ]]= h->non_zero_count_cache[scan8[1 ]]=
1293 h->non_zero_count_cache[scan8[2 ]]= h->non_zero_count_cache[scan8[3 ]]= h->cbp & 1;
1295 h->non_zero_count_cache[scan8[0+ 4]]= h->non_zero_count_cache[scan8[1+ 4]]=
1296 h->non_zero_count_cache[scan8[2+ 4]]= h->non_zero_count_cache[scan8[3+ 4]]= h->cbp & 2;
1298 h->non_zero_count_cache[scan8[0+ 8]]= h->non_zero_count_cache[scan8[1+ 8]]=
1299 h->non_zero_count_cache[scan8[2+ 8]]= h->non_zero_count_cache[scan8[3+ 8]]= h->cbp & 4;
1301 h->non_zero_count_cache[scan8[0+12]]= h->non_zero_count_cache[scan8[1+12]]=
1302 h->non_zero_count_cache[scan8[2+12]]= h->non_zero_count_cache[scan8[3+12]]= h->cbp & 8;
1306 if(IS_INTER(mb_type) || IS_DIRECT(mb_type)){
1308 for(list=0; list<h->list_count; list++){
1309 if(USES_LIST(top_type, list)){
1310 const int b_xy= h->mb2b_xy[top_xy] + 3*h->b_stride;
1311 const int b8_xy= 4*top_xy + 2;
1312 int (*ref2frm)[64] = h->ref2frm[ h->slice_table[top_xy]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
1313 AV_COPY128(h->mv_cache[list][scan8[0] + 0 - 1*8], s->current_picture.motion_val[list][b_xy + 0]);
1314 h->ref_cache[list][scan8[0] + 0 - 1*8]=
1315 h->ref_cache[list][scan8[0] + 1 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 0]];
1316 h->ref_cache[list][scan8[0] + 2 - 1*8]=
1317 h->ref_cache[list][scan8[0] + 3 - 1*8]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 1]];
1319 AV_ZERO128(h->mv_cache[list][scan8[0] + 0 - 1*8]);
1320 AV_WN32A(&h->ref_cache[list][scan8[0] + 0 - 1*8], ((LIST_NOT_USED)&0xFF)*0x01010101u);
1323 if(!IS_INTERLACED(mb_type^left_type[0])){
1324 if(USES_LIST(left_type[0], list)){
1325 const int b_xy= h->mb2b_xy[left_xy[0]] + 3;
1326 const int b8_xy= 4*left_xy[0] + 1;
1327 int (*ref2frm)[64] = h->ref2frm[ h->slice_table[left_xy[0]]&(MAX_SLICES-1) ][0] + (MB_MBAFF ? 20 : 2);
1328 AV_COPY32(h->mv_cache[list][scan8[0] - 1 + 0 ], s->current_picture.motion_val[list][b_xy + h->b_stride*0]);
1329 AV_COPY32(h->mv_cache[list][scan8[0] - 1 + 8 ], s->current_picture.motion_val[list][b_xy + h->b_stride*1]);
1330 AV_COPY32(h->mv_cache[list][scan8[0] - 1 +16 ], s->current_picture.motion_val[list][b_xy + h->b_stride*2]);
1331 AV_COPY32(h->mv_cache[list][scan8[0] - 1 +24 ], s->current_picture.motion_val[list][b_xy + h->b_stride*3]);
1332 h->ref_cache[list][scan8[0] - 1 + 0 ]=
1333 h->ref_cache[list][scan8[0] - 1 + 8 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 2*0]];
1334 h->ref_cache[list][scan8[0] - 1 +16 ]=
1335 h->ref_cache[list][scan8[0] - 1 +24 ]= ref2frm[list][s->current_picture.ref_index[list][b8_xy + 2*1]];
1337 AV_ZERO32(h->mv_cache [list][scan8[0] - 1 + 0 ]);
1338 AV_ZERO32(h->mv_cache [list][scan8[0] - 1 + 8 ]);
1339 AV_ZERO32(h->mv_cache [list][scan8[0] - 1 +16 ]);
1340 AV_ZERO32(h->mv_cache [list][scan8[0] - 1 +24 ]);
1341 h->ref_cache[list][scan8[0] - 1 + 0 ]=
1342 h->ref_cache[list][scan8[0] - 1 + 8 ]=
1343 h->ref_cache[list][scan8[0] - 1 + 16 ]=
1344 h->ref_cache[list][scan8[0] - 1 + 24 ]= LIST_NOT_USED;
1354 * gets the predicted intra4x4 prediction mode.
1356 static inline int pred_intra_mode(H264Context *h, int n){
1357 const int index8= scan8[n];
1358 const int left= h->intra4x4_pred_mode_cache[index8 - 1];
1359 const int top = h->intra4x4_pred_mode_cache[index8 - 8];
1360 const int min= FFMIN(left, top);
1362 tprintf(h->s.avctx, "mode:%d %d min:%d\n", left ,top, min);
1364 if(min<0) return DC_PRED;
1368 static inline void write_back_non_zero_count(H264Context *h){
1369 const int mb_xy= h->mb_xy;
1371 AV_COPY64(&h->non_zero_count[mb_xy][ 0], &h->non_zero_count_cache[0+8*1]);
1372 AV_COPY64(&h->non_zero_count[mb_xy][ 8], &h->non_zero_count_cache[0+8*2]);
1373 AV_COPY32(&h->non_zero_count[mb_xy][16], &h->non_zero_count_cache[0+8*5]);
1374 AV_COPY32(&h->non_zero_count[mb_xy][20], &h->non_zero_count_cache[4+8*3]);
1375 AV_COPY64(&h->non_zero_count[mb_xy][24], &h->non_zero_count_cache[0+8*4]);
1378 static inline void write_back_motion(H264Context *h, int mb_type){
1379 MpegEncContext * const s = &h->s;
1380 const int b_xy = 4*s->mb_x + 4*s->mb_y*h->b_stride; //try mb2b(8)_xy
1381 const int b8_xy= 4*h->mb_xy;
1384 if(!USES_LIST(mb_type, 0))
1385 fill_rectangle(&s->current_picture.ref_index[0][b8_xy], 2, 2, 2, (uint8_t)LIST_NOT_USED, 1);
1387 for(list=0; list<h->list_count; list++){
1389 int16_t (*mv_dst)[2];
1390 int16_t (*mv_src)[2];
1392 if(!USES_LIST(mb_type, list))
1395 b_stride = h->b_stride;
1396 mv_dst = &s->current_picture.motion_val[list][b_xy];
1397 mv_src = &h->mv_cache[list][scan8[0]];
1399 AV_COPY128(mv_dst + y*b_stride, mv_src + 8*y);
1402 uint8_t (*mvd_dst)[2] = &h->mvd_table[list][FMO ? 8*h->mb_xy : h->mb2br_xy[h->mb_xy]];
1403 uint8_t (*mvd_src)[2] = &h->mvd_cache[list][scan8[0]];
1404 if(IS_SKIP(mb_type))
1405 AV_ZERO128(mvd_dst);
1407 AV_COPY64(mvd_dst, mvd_src + 8*3);
1408 AV_COPY16(mvd_dst + 3 + 3, mvd_src + 3 + 8*0);
1409 AV_COPY16(mvd_dst + 3 + 2, mvd_src + 3 + 8*1);
1410 AV_COPY16(mvd_dst + 3 + 1, mvd_src + 3 + 8*2);
1415 int8_t *ref_index = &s->current_picture.ref_index[list][b8_xy];
1416 ref_index[0+0*2]= h->ref_cache[list][scan8[0]];
1417 ref_index[1+0*2]= h->ref_cache[list][scan8[4]];
1418 ref_index[0+1*2]= h->ref_cache[list][scan8[8]];
1419 ref_index[1+1*2]= h->ref_cache[list][scan8[12]];
1423 if(h->slice_type_nos == FF_B_TYPE && CABAC){
1424 if(IS_8X8(mb_type)){
1425 uint8_t *direct_table = &h->direct_table[4*h->mb_xy];
1426 direct_table[1] = h->sub_mb_type[1]>>1;
1427 direct_table[2] = h->sub_mb_type[2]>>1;
1428 direct_table[3] = h->sub_mb_type[3]>>1;
1433 static inline int get_dct8x8_allowed(H264Context *h){
1434 if(h->sps.direct_8x8_inference_flag)
1435 return !(AV_RN64A(h->sub_mb_type) & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8 )*0x0001000100010001ULL));
1437 return !(AV_RN64A(h->sub_mb_type) & ((MB_TYPE_16x8|MB_TYPE_8x16|MB_TYPE_8x8|MB_TYPE_DIRECT2)*0x0001000100010001ULL));
1441 * decodes a P_SKIP or B_SKIP macroblock
1443 static void decode_mb_skip(H264Context *h){
1444 MpegEncContext * const s = &h->s;
1445 const int mb_xy= h->mb_xy;
1448 memset(h->non_zero_count[mb_xy], 0, 32);
1449 memset(h->non_zero_count_cache + 8, 0, 8*5); //FIXME ugly, remove pfui
1452 mb_type|= MB_TYPE_INTERLACED;
1454 if( h->slice_type_nos == FF_B_TYPE )
1456 // just for fill_caches. pred_direct_motion will set the real mb_type
1457 mb_type|= MB_TYPE_L0L1|MB_TYPE_DIRECT2|MB_TYPE_SKIP;
1458 if(h->direct_spatial_mv_pred){
1459 fill_decode_neighbors(h, mb_type);
1460 fill_decode_caches(h, mb_type); //FIXME check what is needed and what not ...
1462 ff_h264_pred_direct_motion(h, &mb_type);
1463 mb_type|= MB_TYPE_SKIP;
1468 mb_type|= MB_TYPE_16x16|MB_TYPE_P0L0|MB_TYPE_P1L0|MB_TYPE_SKIP;
1470 fill_decode_neighbors(h, mb_type);
1471 fill_decode_caches(h, mb_type); //FIXME check what is needed and what not ...
1472 pred_pskip_motion(h, &mx, &my);
1473 fill_rectangle(&h->ref_cache[0][scan8[0]], 4, 4, 8, 0, 1);
1474 fill_rectangle( h->mv_cache[0][scan8[0]], 4, 4, 8, pack16to32(mx,my), 4);
1477 write_back_motion(h, mb_type);
1478 s->current_picture.mb_type[mb_xy]= mb_type;
1479 s->current_picture.qscale_table[mb_xy]= s->qscale;
1480 h->slice_table[ mb_xy ]= h->slice_num;
1481 h->prev_mb_skipped= 1;
1484 #include "h264_mvpred.h" //For pred_pskip_motion()
1486 #endif /* AVCODEC_H264_H */