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"
33 #include "error_resilience.h"
35 #include "mpegvideo.h"
36 #include "h264chroma.h"
40 #include "rectangle.h"
42 #define MAX_SPS_COUNT 32
43 #define MAX_PPS_COUNT 256
45 #define MAX_MMCO_COUNT 66
47 #define MAX_DELAYED_PIC_COUNT 16
49 #define MAX_MBPAIR_SIZE (256*1024) // a tighter bound could be calculated if someone cares about a few bytes
51 /* Compiling in interlaced support reduces the speed
52 * of progressive decoding by about 2%. */
53 #define ALLOW_INTERLACE
58 * The maximum number of slices supported by the decoder.
59 * must be a power of 2
63 #ifdef ALLOW_INTERLACE
64 #define MB_MBAFF(h) h->mb_mbaff
65 #define MB_FIELD(h) h->mb_field_decoding_flag
66 #define FRAME_MBAFF(h) h->mb_aff_frame
67 #define FIELD_PICTURE(h) (h->picture_structure != PICT_FRAME)
75 #define FRAME_MBAFF(h) 0
76 #define FIELD_PICTURE(h) 0
78 #define IS_INTERLACED(mb_type) 0
84 #define FIELD_OR_MBAFF_PICTURE(h) (FRAME_MBAFF(h) || FIELD_PICTURE(h))
87 #define CABAC(h) h->pps.cabac
90 #define CHROMA(h) (h->sps.chroma_format_idc)
91 #define CHROMA422(h) (h->sps.chroma_format_idc == 2)
92 #define CHROMA444(h) (h->sps.chroma_format_idc == 3)
94 #define EXTENDED_SAR 255
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)
101 #define QP_MAX_NUM (51 + 6*6) // The maximum supported qp
114 NAL_END_SEQUENCE = 10,
116 NAL_FILLER_DATA = 12,
118 NAL_AUXILIARY_SLICE = 19,
119 NAL_FF_IGNORE = 0xff0f001,
126 SEI_BUFFERING_PERIOD = 0, ///< buffering period (H.264, D.1.1)
127 SEI_TYPE_PIC_TIMING = 1, ///< picture timing
128 SEI_TYPE_USER_DATA_ITU_T_T35 = 4, ///< user data registered by ITU-T Recommendation T.35
129 SEI_TYPE_USER_DATA_UNREGISTERED = 5, ///< unregistered user data
130 SEI_TYPE_RECOVERY_POINT = 6, ///< recovery point (frame # to decoder sync)
131 SEI_TYPE_FRAME_PACKING = 45, ///< frame packing arrangement
135 * pic_struct in picture timing SEI message
138 SEI_PIC_STRUCT_FRAME = 0, ///< 0: %frame
139 SEI_PIC_STRUCT_TOP_FIELD = 1, ///< 1: top field
140 SEI_PIC_STRUCT_BOTTOM_FIELD = 2, ///< 2: bottom field
141 SEI_PIC_STRUCT_TOP_BOTTOM = 3, ///< 3: top field, bottom field, in that order
142 SEI_PIC_STRUCT_BOTTOM_TOP = 4, ///< 4: bottom field, top field, in that order
143 SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, ///< 5: top field, bottom field, top field repeated, in that order
144 SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///< 6: bottom field, top field, bottom field repeated, in that order
145 SEI_PIC_STRUCT_FRAME_DOUBLING = 7, ///< 7: %frame doubling
146 SEI_PIC_STRUCT_FRAME_TRIPLING = 8 ///< 8: %frame tripling
150 * frame_packing_arrangement types
153 SEI_FPA_TYPE_CHECKERBOARD = 0,
154 SEI_FPA_TYPE_INTERLEAVE_COLUMN = 1,
155 SEI_FPA_TYPE_INTERLEAVE_ROW = 2,
156 SEI_FPA_TYPE_SIDE_BY_SIDE = 3,
157 SEI_FPA_TYPE_TOP_BOTTOM = 4,
158 SEI_FPA_TYPE_INTERLEAVE_TEMPORAL = 5,
163 * Sequence parameter set
168 int chroma_format_idc;
169 int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag
170 int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4
171 int poc_type; ///< pic_order_cnt_type
172 int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4
173 int delta_pic_order_always_zero_flag;
174 int offset_for_non_ref_pic;
175 int offset_for_top_to_bottom_field;
176 int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle
177 int ref_frame_count; ///< num_ref_frames
178 int gaps_in_frame_num_allowed_flag;
179 int mb_width; ///< pic_width_in_mbs_minus1 + 1
180 int mb_height; ///< pic_height_in_map_units_minus1 + 1
181 int frame_mbs_only_flag;
182 int mb_aff; ///< mb_adaptive_frame_field_flag
183 int direct_8x8_inference_flag;
184 int crop; ///< frame_cropping_flag
186 /* those 4 are already in luma samples */
187 unsigned int crop_left; ///< frame_cropping_rect_left_offset
188 unsigned int crop_right; ///< frame_cropping_rect_right_offset
189 unsigned int crop_top; ///< frame_cropping_rect_top_offset
190 unsigned int crop_bottom; ///< frame_cropping_rect_bottom_offset
191 int vui_parameters_present_flag;
193 int video_signal_type_present_flag;
195 int colour_description_present_flag;
196 enum AVColorPrimaries color_primaries;
197 enum AVColorTransferCharacteristic color_trc;
198 enum AVColorSpace colorspace;
199 int timing_info_present_flag;
200 uint32_t num_units_in_tick;
202 int fixed_frame_rate_flag;
203 short offset_for_ref_frame[256]; // FIXME dyn aloc?
204 int bitstream_restriction_flag;
205 int num_reorder_frames;
206 int scaling_matrix_present;
207 uint8_t scaling_matrix4[6][16];
208 uint8_t scaling_matrix8[6][64];
209 int nal_hrd_parameters_present_flag;
210 int vcl_hrd_parameters_present_flag;
211 int pic_struct_present_flag;
212 int time_offset_length;
213 int cpb_cnt; ///< See H.264 E.1.2
214 int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 + 1
215 int cpb_removal_delay_length; ///< cpb_removal_delay_length_minus1 + 1
216 int dpb_output_delay_length; ///< dpb_output_delay_length_minus1 + 1
217 int bit_depth_luma; ///< bit_depth_luma_minus8 + 8
218 int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8
219 int residual_color_transform_flag; ///< residual_colour_transform_flag
220 int constraint_set_flags; ///< constraint_set[0-3]_flag
221 int new; ///< flag to keep track if the decoder context needs re-init due to changed SPS
225 * Picture parameter set
229 int cabac; ///< entropy_coding_mode_flag
230 int pic_order_present; ///< pic_order_present_flag
231 int slice_group_count; ///< num_slice_groups_minus1 + 1
232 int mb_slice_group_map_type;
233 unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1
234 int weighted_pred; ///< weighted_pred_flag
235 int weighted_bipred_idc;
236 int init_qp; ///< pic_init_qp_minus26 + 26
237 int init_qs; ///< pic_init_qs_minus26 + 26
238 int chroma_qp_index_offset[2];
239 int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
240 int constrained_intra_pred; ///< constrained_intra_pred_flag
241 int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
242 int transform_8x8_mode; ///< transform_8x8_mode_flag
243 uint8_t scaling_matrix4[6][16];
244 uint8_t scaling_matrix8[6][64];
245 uint8_t chroma_qp_table[2][QP_MAX_NUM+1]; ///< pre-scaled (with chroma_qp_index_offset) version of qp_table
250 * Frame Packing Arrangement Type
253 int frame_packing_arrangement_id;
254 int frame_packing_arrangement_cancel_flag; ///< is previous arrangement canceled, -1 if never received
255 SEI_FpaType frame_packing_arrangement_type;
256 int frame_packing_arrangement_repetition_period;
257 int content_interpretation_type;
258 int quincunx_sampling_flag;
262 * Memory management control operation opcode.
264 typedef enum MMCOOpcode {
275 * Memory management control operation.
277 typedef struct MMCO {
279 int short_pic_num; ///< pic_num without wrapping (pic_num & max_pic_num)
280 int long_arg; ///< index, pic_num, or num long refs depending on opcode
286 typedef struct H264Context {
287 AVCodecContext *avctx;
288 VideoDSPContext vdsp;
289 H264DSPContext h264dsp;
290 H264ChromaContext h264chroma;
291 H264QpelContext h264qpel;
293 ParseContext parse_context;
299 Picture *cur_pic_ptr;
302 int pixel_shift; ///< 0 for 8-bit H264, 1 for high-bit-depth H264
303 int chroma_qp[2]; // QPc
305 int qp_thresh; ///< QP threshold to skip loopfilter
307 /* coded dimensions -- 16 * mb w/h */
309 ptrdiff_t linesize, uvlinesize;
310 int chroma_x_shift, chroma_y_shift;
314 int data_partitioning;
315 int coded_picture_number;
318 int context_initialized;
326 int chroma_pred_mode;
327 int intra16x16_pred_mode;
332 int left_mb_xy[LEFT_MBS];
337 int left_type[LEFT_MBS];
339 const uint8_t *left_block;
340 int topleft_partition;
342 int8_t intra4x4_pred_mode_cache[5 * 8];
343 int8_t(*intra4x4_pred_mode);
345 unsigned int topleft_samples_available;
346 unsigned int top_samples_available;
347 unsigned int topright_samples_available;
348 unsigned int left_samples_available;
349 uint8_t (*top_borders[2])[(16 * 3) * 2];
352 * non zero coeff count cache.
353 * is 64 if not available.
355 DECLARE_ALIGNED(8, uint8_t, non_zero_count_cache)[15 * 8];
357 uint8_t (*non_zero_count)[48];
360 * Motion vector cache.
362 DECLARE_ALIGNED(16, int16_t, mv_cache)[2][5 * 8][2];
363 DECLARE_ALIGNED(8, int8_t, ref_cache)[2][5 * 8];
364 #define LIST_NOT_USED -1 // FIXME rename?
365 #define PART_NOT_AVAILABLE -2
368 * number of neighbors (top and/or left) that used 8x8 dct
370 int neighbor_transform_size;
373 * block_offset[ 0..23] for frame macroblocks
374 * block_offset[24..47] for field macroblocks
376 int block_offset[2 * (16 * 3)];
378 uint32_t *mb2b_xy; // FIXME are these 4 a good idea?
380 int b_stride; // FIXME use s->b4_stride
382 ptrdiff_t mb_linesize; ///< may be equal to s->linesize or s->linesize * 2, for mbaff
383 ptrdiff_t mb_uvlinesize;
385 unsigned current_sps_id; ///< id of the current SPS
386 SPS sps; ///< current sps
391 PPS pps; // FIXME move to Picture perhaps? (->no) do we need that?
393 int au_pps_id; ///< pps_id of current access unit
395 uint32_t dequant4_buffer[6][QP_MAX_NUM + 1][16]; // FIXME should these be moved down?
396 uint32_t dequant8_buffer[6][QP_MAX_NUM + 1][64];
397 uint32_t(*dequant4_coeff[6])[16];
398 uint32_t(*dequant8_coeff[6])[64];
401 uint16_t *slice_table; ///< slice_table_base + 2*mb_stride + 1
403 int slice_type_nos; ///< S free slice type (SI/SP are remapped to I/P)
404 int slice_type_fixed;
406 // interlacing specific flags
408 int mb_field_decoding_flag;
409 int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag
410 int picture_structure;
413 DECLARE_ALIGNED(8, uint16_t, sub_mb_type)[4];
415 // Weighted pred stuff
417 int use_weight_chroma;
418 int luma_log2_weight_denom;
419 int chroma_log2_weight_denom;
420 // The following 2 can be changed to int8_t but that causes 10cpu cycles speedloss
421 int luma_weight[48][2][2];
422 int chroma_weight[48][2][2][2];
423 int implicit_weight[48][48][2];
425 int direct_spatial_mv_pred;
428 int dist_scale_factor[32];
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];
434 * num_ref_idx_l0/1_active_minus1 + 1
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 ref_list[2][48]; /**< 0..15: frame refs, 16..47: mbaff field refs.
440 * Reordered version of default_ref_list
441 * according to picture reordering in slice header */
442 int ref2frm[MAX_SLICES][2][64]; ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
445 GetBitContext intra_gb;
446 GetBitContext inter_gb;
447 GetBitContext *intra_gb_ptr;
448 GetBitContext *inter_gb_ptr;
450 const uint8_t *intra_pcm_ptr;
451 DECLARE_ALIGNED(16, int16_t, mb)[16 * 48 * 2]; ///< as a dct coeffecient is int32_t in high depth, we need to reserve twice the space.
452 DECLARE_ALIGNED(16, int16_t, mb_luma_dc)[3][16 * 2];
453 int16_t 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
459 uint8_t cabac_state[1024];
461 /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0, 1, 2), 0x0? luma_cbp */
466 /* chroma_pred_mode for i4x4 or i16x16, else 0 */
467 uint8_t *chroma_pred_mode_table;
468 int last_qscale_diff;
469 uint8_t (*mvd_table[2])[2];
470 DECLARE_ALIGNED(16, uint8_t, mvd_cache)[2][5 * 8][2];
471 uint8_t *direct_table;
472 uint8_t direct_cache[5 * 8];
474 uint8_t zigzag_scan[16];
475 uint8_t zigzag_scan8x8[64];
476 uint8_t zigzag_scan8x8_cavlc[64];
477 uint8_t field_scan[16];
478 uint8_t field_scan8x8[64];
479 uint8_t field_scan8x8_cavlc[64];
480 uint8_t zigzag_scan_q0[16];
481 uint8_t zigzag_scan8x8_q0[64];
482 uint8_t zigzag_scan8x8_cavlc_q0[64];
483 uint8_t field_scan_q0[16];
484 uint8_t field_scan8x8_q0[64];
485 uint8_t field_scan8x8_cavlc_q0[64];
493 int mb_height, mb_width;
501 int deblocking_filter; ///< disable_deblocking_filter_idc with 1 <-> 0
502 int slice_alpha_c0_offset;
503 int slice_beta_offset;
505 // =============================================================
506 // Things below are not used in the MB or more inner code
510 uint8_t *rbsp_buffer[2];
511 unsigned int rbsp_buffer_size[2];
514 * Used to parse AVC variant of h264
516 int is_avc; ///< this flag is != 0 if codec is avc1
517 int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
518 int got_first; ///< this flag is != 0 if we've parsed a frame
520 int bit_depth_luma; ///< luma bit depth from sps to detect changes
521 int chroma_format_idc; ///< chroma format from sps to detect changes
523 SPS *sps_buffers[MAX_SPS_COUNT];
524 PPS *pps_buffers[MAX_PPS_COUNT];
526 int dequant_coeff_pps; ///< reinit tables when pps changes
528 uint16_t *slice_table_base;
533 int delta_poc_bottom;
536 int prev_poc_msb; ///< poc_msb of the last reference pic for POC type 0
537 int prev_poc_lsb; ///< poc_lsb of the last reference pic for POC type 0
538 int frame_num_offset; ///< for POC type 2
539 int prev_frame_num_offset; ///< for POC type 2
540 int prev_frame_num; ///< frame_num of the last pic for POC type 1/2
543 * frame_num for frames or 2 * frame_num + 1 for field pics.
548 * max_frame_num or 2 * max_frame_num for field pics.
552 int redundant_pic_count;
554 Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
555 Picture *short_ref[32];
556 Picture *long_ref[32];
557 Picture *delayed_pic[MAX_DELAYED_PIC_COUNT + 2]; // FIXME size?
558 int last_pocs[MAX_DELAYED_PIC_COUNT];
559 Picture *next_output_pic;
561 int next_outputed_poc;
564 * memory management control operations buffer.
566 MMCO mmco[MAX_MMCO_COUNT];
570 int long_ref_count; ///< number of actual long term references
571 int short_ref_count; ///< number of actual short term references
576 * @name Members for slice based multithreading
579 struct H264Context *thread_context[MAX_THREADS];
582 * current slice number, used to initialize slice_num of each thread/context
587 * Max number of threads / contexts.
588 * This is equal to AVCodecContext.thread_count unless
589 * multithreaded decoding is impossible, in which case it is
594 int slice_context_count;
597 * 1 if the single thread fallback warning has already been
598 * displayed, 0 otherwise.
600 int single_decode_warning;
602 enum AVPictureType pict_type;
605 unsigned int last_ref_count[2];
609 * pic_struct in picture timing SEI message
611 SEI_PicStructType sei_pic_struct;
614 * Complement sei_pic_struct
615 * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
616 * However, soft telecined frames may have these values.
617 * This is used in an attempt to flag soft telecine progressive.
619 int prev_interlaced_frame;
622 * frame_packing_arrangment SEI message
624 int sei_frame_packing_present;
625 int frame_packing_arrangement_type;
626 int content_interpretation_type;
627 int quincunx_subsampling;
630 * Bit set of clock types for fields/frames in picture timing SEI message.
631 * For each found ct_type, appropriate bit is set (e.g., bit 1 for
637 * dpb_output_delay in picture timing SEI message, see H.264 C.2.2
639 int sei_dpb_output_delay;
642 * cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
644 int sei_cpb_removal_delay;
647 * recovery_frame_cnt from SEI message
649 * Set to -1 if no recovery point SEI message found or to number of frames
650 * before playback synchronizes. Frames having recovery point are key
653 int sei_recovery_frame_cnt;
656 * Are the SEI recovery points looking valid.
658 int valid_recovery_point;
663 * recovery_frame is the frame_num at which the next frame should
664 * be fully constructed.
666 * Set to -1 when not expecting a recovery point.
671 * We have seen an IDR, so all the following frames in coded order are correctly
674 #define FRAME_RECOVERED_IDR (1 << 0)
676 * Sufficient number of frames have been decoded since a SEI recovery point,
677 * so all the following frames in presentation order are correct.
679 #define FRAME_RECOVERED_SEI (1 << 1)
681 int frame_recovered; ///< Initial frame has been completely recovered
683 int luma_weight_flag[2]; ///< 7.4.3.2 luma_weight_lX_flag
684 int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
687 int sei_buffering_period_present; ///< Buffering period SEI flag
688 int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
690 int cur_chroma_format_idc;
691 uint8_t *bipred_scratchpad;
693 int16_t slice_row[MAX_SLICES]; ///< to detect when MAX_SLICES is too low
695 uint8_t parse_history[4];
696 int parse_history_count;
698 uint8_t *edge_emu_buffer;
699 int16_t *dc_val_base;
701 AVBufferPool *qscale_table_pool;
702 AVBufferPool *mb_type_pool;
703 AVBufferPool *motion_val_pool;
704 AVBufferPool *ref_index_pool;
707 extern const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM + 1]; ///< One chroma qp table for each possible bit depth (8-14).
708 extern const uint16_t ff_h264_mb_sizes[4];
713 int ff_h264_decode_sei(H264Context *h);
718 int ff_h264_decode_seq_parameter_set(H264Context *h);
721 * compute profile from sps
723 int ff_h264_get_profile(SPS *sps);
728 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length);
731 * Decode a network abstraction layer unit.
732 * @param consumed is the number of bytes used as input
733 * @param length is the length of the array
734 * @param dst_length is the number of decoded bytes FIXME here
735 * or a decode rbsp tailing?
736 * @return decoded bytes, might be src+1 if no escapes
738 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src,
739 int *dst_length, int *consumed, int length);
742 * Free any data that may have been allocated in the H264 context
745 void ff_h264_free_context(H264Context *h);
748 * Reconstruct bitstream slice_type.
750 int ff_h264_get_slice_type(const H264Context *h);
756 int ff_h264_alloc_tables(H264Context *h);
759 * Fill the default_ref_list.
761 int ff_h264_fill_default_ref_list(H264Context *h);
763 int ff_h264_decode_ref_pic_list_reordering(H264Context *h);
764 void ff_h264_fill_mbaff_ref_list(H264Context *h);
765 void ff_h264_remove_all_refs(H264Context *h);
768 * Execute the reference picture marking (memory management control operations).
770 int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count);
772 int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb,
775 int ff_generate_sliding_window_mmcos(H264Context *h, int first_slice);
778 * Check if the top & left blocks are available if needed & change the
779 * dc mode so it only uses the available blocks.
781 int ff_h264_check_intra4x4_pred_mode(H264Context *h);
784 * Check if the top & left blocks are available if needed & change the
785 * dc mode so it only uses the available blocks.
787 int ff_h264_check_intra_pred_mode(H264Context *h, int mode, int is_chroma);
789 void ff_h264_hl_decode_mb(H264Context *h);
790 int ff_h264_decode_extradata(H264Context *h, const uint8_t *buf, int size);
791 int ff_h264_decode_init(AVCodecContext *avctx);
792 void ff_h264_decode_init_vlc(void);
795 * Decode a macroblock
796 * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
798 int ff_h264_decode_mb_cavlc(H264Context *h);
801 * Decode a CABAC coded macroblock
802 * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
804 int ff_h264_decode_mb_cabac(H264Context *h);
806 void ff_h264_init_cabac_states(H264Context *h);
808 void ff_h264_direct_dist_scale_factor(H264Context *const h);
809 void ff_h264_direct_ref_list_init(H264Context *const h);
810 void ff_h264_pred_direct_motion(H264Context *const h, int *mb_type);
812 void ff_h264_filter_mb_fast(H264Context *h, int mb_x, int mb_y,
813 uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
814 unsigned int linesize, unsigned int uvlinesize);
815 void ff_h264_filter_mb(H264Context *h, int mb_x, int mb_y,
816 uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
817 unsigned int linesize, unsigned int uvlinesize);
820 * Reset SEI values at the beginning of the frame.
822 * @param h H.264 context.
824 void ff_h264_reset_sei(H264Context *h);
827 * Get stereo_mode string from the h264 frame_packing_arrangement
828 * @param h H.264 context.
830 const char* ff_h264_sei_stereo_mode(H264Context *h);
842 /* Scan8 organization:
859 * DY/DU/DV are for luma/chroma DC.
862 #define LUMA_DC_BLOCK_INDEX 48
863 #define CHROMA_DC_BLOCK_INDEX 49
865 // This table must be here because scan8[constant] must be known at compiletime
866 static const uint8_t scan8[16 * 3 + 3] = {
867 4 + 1 * 8, 5 + 1 * 8, 4 + 2 * 8, 5 + 2 * 8,
868 6 + 1 * 8, 7 + 1 * 8, 6 + 2 * 8, 7 + 2 * 8,
869 4 + 3 * 8, 5 + 3 * 8, 4 + 4 * 8, 5 + 4 * 8,
870 6 + 3 * 8, 7 + 3 * 8, 6 + 4 * 8, 7 + 4 * 8,
871 4 + 6 * 8, 5 + 6 * 8, 4 + 7 * 8, 5 + 7 * 8,
872 6 + 6 * 8, 7 + 6 * 8, 6 + 7 * 8, 7 + 7 * 8,
873 4 + 8 * 8, 5 + 8 * 8, 4 + 9 * 8, 5 + 9 * 8,
874 6 + 8 * 8, 7 + 8 * 8, 6 + 9 * 8, 7 + 9 * 8,
875 4 + 11 * 8, 5 + 11 * 8, 4 + 12 * 8, 5 + 12 * 8,
876 6 + 11 * 8, 7 + 11 * 8, 6 + 12 * 8, 7 + 12 * 8,
877 4 + 13 * 8, 5 + 13 * 8, 4 + 14 * 8, 5 + 14 * 8,
878 6 + 13 * 8, 7 + 13 * 8, 6 + 14 * 8, 7 + 14 * 8,
879 0 + 0 * 8, 0 + 5 * 8, 0 + 10 * 8
882 static av_always_inline uint32_t pack16to32(int a, int b)
885 return (b & 0xFFFF) + (a << 16);
887 return (a & 0xFFFF) + (b << 16);
891 static av_always_inline uint16_t pack8to16(int a, int b)
894 return (b & 0xFF) + (a << 8);
896 return (a & 0xFF) + (b << 8);
903 static av_always_inline int get_chroma_qp(H264Context *h, int t, int qscale)
905 return h->pps.chroma_qp_table[t][qscale];
909 * Get the predicted intra4x4 prediction mode.
911 static av_always_inline int pred_intra_mode(H264Context *h, int n)
913 const int index8 = scan8[n];
914 const int left = h->intra4x4_pred_mode_cache[index8 - 1];
915 const int top = h->intra4x4_pred_mode_cache[index8 - 8];
916 const int min = FFMIN(left, top);
918 tprintf(h->avctx, "mode:%d %d min:%d\n", left, top, min);
926 static av_always_inline void write_back_intra_pred_mode(H264Context *h)
928 int8_t *i4x4 = h->intra4x4_pred_mode + h->mb2br_xy[h->mb_xy];
929 int8_t *i4x4_cache = h->intra4x4_pred_mode_cache;
931 AV_COPY32(i4x4, i4x4_cache + 4 + 8 * 4);
932 i4x4[4] = i4x4_cache[7 + 8 * 3];
933 i4x4[5] = i4x4_cache[7 + 8 * 2];
934 i4x4[6] = i4x4_cache[7 + 8 * 1];
937 static av_always_inline void write_back_non_zero_count(H264Context *h)
939 const int mb_xy = h->mb_xy;
940 uint8_t *nnz = h->non_zero_count[mb_xy];
941 uint8_t *nnz_cache = h->non_zero_count_cache;
943 AV_COPY32(&nnz[ 0], &nnz_cache[4 + 8 * 1]);
944 AV_COPY32(&nnz[ 4], &nnz_cache[4 + 8 * 2]);
945 AV_COPY32(&nnz[ 8], &nnz_cache[4 + 8 * 3]);
946 AV_COPY32(&nnz[12], &nnz_cache[4 + 8 * 4]);
947 AV_COPY32(&nnz[16], &nnz_cache[4 + 8 * 6]);
948 AV_COPY32(&nnz[20], &nnz_cache[4 + 8 * 7]);
949 AV_COPY32(&nnz[32], &nnz_cache[4 + 8 * 11]);
950 AV_COPY32(&nnz[36], &nnz_cache[4 + 8 * 12]);
952 if (!h->chroma_y_shift) {
953 AV_COPY32(&nnz[24], &nnz_cache[4 + 8 * 8]);
954 AV_COPY32(&nnz[28], &nnz_cache[4 + 8 * 9]);
955 AV_COPY32(&nnz[40], &nnz_cache[4 + 8 * 13]);
956 AV_COPY32(&nnz[44], &nnz_cache[4 + 8 * 14]);
960 static av_always_inline void write_back_motion_list(H264Context *h,
963 int mb_type, int list)
965 int16_t(*mv_dst)[2] = &h->cur_pic.motion_val[list][b_xy];
966 int16_t(*mv_src)[2] = &h->mv_cache[list][scan8[0]];
967 AV_COPY128(mv_dst + 0 * b_stride, mv_src + 8 * 0);
968 AV_COPY128(mv_dst + 1 * b_stride, mv_src + 8 * 1);
969 AV_COPY128(mv_dst + 2 * b_stride, mv_src + 8 * 2);
970 AV_COPY128(mv_dst + 3 * b_stride, mv_src + 8 * 3);
972 uint8_t (*mvd_dst)[2] = &h->mvd_table[list][FMO ? 8 * h->mb_xy
973 : h->mb2br_xy[h->mb_xy]];
974 uint8_t(*mvd_src)[2] = &h->mvd_cache[list][scan8[0]];
975 if (IS_SKIP(mb_type)) {
978 AV_COPY64(mvd_dst, mvd_src + 8 * 3);
979 AV_COPY16(mvd_dst + 3 + 3, mvd_src + 3 + 8 * 0);
980 AV_COPY16(mvd_dst + 3 + 2, mvd_src + 3 + 8 * 1);
981 AV_COPY16(mvd_dst + 3 + 1, mvd_src + 3 + 8 * 2);
986 int8_t *ref_index = &h->cur_pic.ref_index[list][b8_xy];
987 int8_t *ref_cache = h->ref_cache[list];
988 ref_index[0 + 0 * 2] = ref_cache[scan8[0]];
989 ref_index[1 + 0 * 2] = ref_cache[scan8[4]];
990 ref_index[0 + 1 * 2] = ref_cache[scan8[8]];
991 ref_index[1 + 1 * 2] = ref_cache[scan8[12]];
995 static av_always_inline void write_back_motion(H264Context *h, int mb_type)
997 const int b_stride = h->b_stride;
998 const int b_xy = 4 * h->mb_x + 4 * h->mb_y * h->b_stride; // try mb2b(8)_xy
999 const int b8_xy = 4 * h->mb_xy;
1001 if (USES_LIST(mb_type, 0)) {
1002 write_back_motion_list(h, b_stride, b_xy, b8_xy, mb_type, 0);
1004 fill_rectangle(&h->cur_pic.ref_index[0][b8_xy],
1005 2, 2, 2, (uint8_t)LIST_NOT_USED, 1);
1007 if (USES_LIST(mb_type, 1))
1008 write_back_motion_list(h, b_stride, b_xy, b8_xy, mb_type, 1);
1010 if (h->slice_type_nos == AV_PICTURE_TYPE_B && CABAC(h)) {
1011 if (IS_8X8(mb_type)) {
1012 uint8_t *direct_table = &h->direct_table[4 * h->mb_xy];
1013 direct_table[1] = h->sub_mb_type[1] >> 1;
1014 direct_table[2] = h->sub_mb_type[2] >> 1;
1015 direct_table[3] = h->sub_mb_type[3] >> 1;
1020 static av_always_inline int get_dct8x8_allowed(H264Context *h)
1022 if (h->sps.direct_8x8_inference_flag)
1023 return !(AV_RN64A(h->sub_mb_type) &
1024 ((MB_TYPE_16x8 | MB_TYPE_8x16 | MB_TYPE_8x8) *
1025 0x0001000100010001ULL));
1027 return !(AV_RN64A(h->sub_mb_type) &
1028 ((MB_TYPE_16x8 | MB_TYPE_8x16 | MB_TYPE_8x8 | MB_TYPE_DIRECT2) *
1029 0x0001000100010001ULL));
1032 void ff_h264_draw_horiz_band(H264Context *h, int y, int height);
1033 int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc);
1034 int ff_pred_weight_table(H264Context *h);
1035 int ff_set_ref_count(H264Context *h);
1037 #endif /* AVCODEC_H264_H */