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_TYPE_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
169 int chroma_format_idc;
170 int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag
171 int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4
172 int poc_type; ///< pic_order_cnt_type
173 int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4
174 int delta_pic_order_always_zero_flag;
175 int offset_for_non_ref_pic;
176 int offset_for_top_to_bottom_field;
177 int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle
178 int ref_frame_count; ///< num_ref_frames
179 int gaps_in_frame_num_allowed_flag;
180 int mb_width; ///< pic_width_in_mbs_minus1 + 1
181 int mb_height; ///< pic_height_in_map_units_minus1 + 1
182 int frame_mbs_only_flag;
183 int mb_aff; ///< mb_adaptive_frame_field_flag
184 int direct_8x8_inference_flag;
185 int crop; ///< frame_cropping_flag
187 /* those 4 are already in luma samples */
188 unsigned int crop_left; ///< frame_cropping_rect_left_offset
189 unsigned int crop_right; ///< frame_cropping_rect_right_offset
190 unsigned int crop_top; ///< frame_cropping_rect_top_offset
191 unsigned int crop_bottom; ///< frame_cropping_rect_bottom_offset
192 int vui_parameters_present_flag;
194 int video_signal_type_present_flag;
196 int colour_description_present_flag;
197 enum AVColorPrimaries color_primaries;
198 enum AVColorTransferCharacteristic color_trc;
199 enum AVColorSpace colorspace;
200 int timing_info_present_flag;
201 uint32_t num_units_in_tick;
203 int fixed_frame_rate_flag;
204 short offset_for_ref_frame[256]; // FIXME dyn aloc?
205 int bitstream_restriction_flag;
206 int num_reorder_frames;
207 int scaling_matrix_present;
208 uint8_t scaling_matrix4[6][16];
209 uint8_t scaling_matrix8[6][64];
210 int nal_hrd_parameters_present_flag;
211 int vcl_hrd_parameters_present_flag;
212 int pic_struct_present_flag;
213 int time_offset_length;
214 int cpb_cnt; ///< See H.264 E.1.2
215 int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 + 1
216 int cpb_removal_delay_length; ///< cpb_removal_delay_length_minus1 + 1
217 int dpb_output_delay_length; ///< dpb_output_delay_length_minus1 + 1
218 int bit_depth_luma; ///< bit_depth_luma_minus8 + 8
219 int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8
220 int residual_color_transform_flag; ///< residual_colour_transform_flag
221 int constraint_set_flags; ///< constraint_set[0-3]_flag
222 int new; ///< flag to keep track if the decoder context needs re-init due to changed SPS
226 * Picture parameter set
230 int cabac; ///< entropy_coding_mode_flag
231 int pic_order_present; ///< pic_order_present_flag
232 int slice_group_count; ///< num_slice_groups_minus1 + 1
233 int mb_slice_group_map_type;
234 unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1
235 int weighted_pred; ///< weighted_pred_flag
236 int weighted_bipred_idc;
237 int init_qp; ///< pic_init_qp_minus26 + 26
238 int init_qs; ///< pic_init_qs_minus26 + 26
239 int chroma_qp_index_offset[2];
240 int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
241 int constrained_intra_pred; ///< constrained_intra_pred_flag
242 int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
243 int transform_8x8_mode; ///< transform_8x8_mode_flag
244 uint8_t scaling_matrix4[6][16];
245 uint8_t scaling_matrix8[6][64];
246 uint8_t chroma_qp_table[2][QP_MAX_NUM+1]; ///< pre-scaled (with chroma_qp_index_offset) version of qp_table
251 * Frame Packing Arrangement Type
254 int frame_packing_arrangement_id;
255 int frame_packing_arrangement_cancel_flag; ///< is previous arrangement canceled, -1 if never received
256 SEI_FpaType frame_packing_arrangement_type;
257 int frame_packing_arrangement_repetition_period;
258 int content_interpretation_type;
259 int quincunx_sampling_flag;
263 * Memory management control operation opcode.
265 typedef enum MMCOOpcode {
276 * Memory management control operation.
278 typedef struct MMCO {
280 int short_pic_num; ///< pic_num without wrapping (pic_num & max_pic_num)
281 int long_arg; ///< index, pic_num, or num long refs depending on opcode
287 typedef struct H264Context {
288 AVCodecContext *avctx;
289 VideoDSPContext vdsp;
290 H264DSPContext h264dsp;
291 H264ChromaContext h264chroma;
292 H264QpelContext h264qpel;
294 ParseContext parse_context;
300 Picture *cur_pic_ptr;
303 int pixel_shift; ///< 0 for 8-bit H264, 1 for high-bit-depth H264
304 int chroma_qp[2]; // QPc
306 int qp_thresh; ///< QP threshold to skip loopfilter
308 /* coded dimensions -- 16 * mb w/h */
310 ptrdiff_t linesize, uvlinesize;
311 int chroma_x_shift, chroma_y_shift;
315 int data_partitioning;
316 int coded_picture_number;
319 int context_initialized;
327 int chroma_pred_mode;
328 int intra16x16_pred_mode;
333 int left_mb_xy[LEFT_MBS];
338 int left_type[LEFT_MBS];
340 const uint8_t *left_block;
341 int topleft_partition;
343 int8_t intra4x4_pred_mode_cache[5 * 8];
344 int8_t(*intra4x4_pred_mode);
346 unsigned int topleft_samples_available;
347 unsigned int top_samples_available;
348 unsigned int topright_samples_available;
349 unsigned int left_samples_available;
350 uint8_t (*top_borders[2])[(16 * 3) * 2];
353 * non zero coeff count cache.
354 * is 64 if not available.
356 DECLARE_ALIGNED(8, uint8_t, non_zero_count_cache)[15 * 8];
358 uint8_t (*non_zero_count)[48];
361 * Motion vector cache.
363 DECLARE_ALIGNED(16, int16_t, mv_cache)[2][5 * 8][2];
364 DECLARE_ALIGNED(8, int8_t, ref_cache)[2][5 * 8];
365 #define LIST_NOT_USED -1 // FIXME rename?
366 #define PART_NOT_AVAILABLE -2
369 * number of neighbors (top and/or left) that used 8x8 dct
371 int neighbor_transform_size;
374 * block_offset[ 0..23] for frame macroblocks
375 * block_offset[24..47] for field macroblocks
377 int block_offset[2 * (16 * 3)];
379 uint32_t *mb2b_xy; // FIXME are these 4 a good idea?
381 int b_stride; // FIXME use s->b4_stride
383 ptrdiff_t mb_linesize; ///< may be equal to s->linesize or s->linesize * 2, for mbaff
384 ptrdiff_t mb_uvlinesize;
386 unsigned current_sps_id; ///< id of the current SPS
387 SPS sps; ///< current sps
388 PPS pps; ///< current pps
390 int au_pps_id; ///< pps_id of current access unit
392 uint32_t dequant4_buffer[6][QP_MAX_NUM + 1][16]; // FIXME should these be moved down?
393 uint32_t dequant8_buffer[6][QP_MAX_NUM + 1][64];
394 uint32_t(*dequant4_coeff[6])[16];
395 uint32_t(*dequant8_coeff[6])[64];
398 uint16_t *slice_table; ///< slice_table_base + 2*mb_stride + 1
400 int slice_type_nos; ///< S free slice type (SI/SP are remapped to I/P)
401 int slice_type_fixed;
403 // interlacing specific flags
405 int mb_field_decoding_flag;
406 int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag
407 int picture_structure;
410 DECLARE_ALIGNED(8, uint16_t, sub_mb_type)[4];
412 // Weighted pred stuff
414 int use_weight_chroma;
415 int luma_log2_weight_denom;
416 int chroma_log2_weight_denom;
417 // The following 2 can be changed to int8_t but that causes 10cpu cycles speedloss
418 int luma_weight[48][2][2];
419 int chroma_weight[48][2][2][2];
420 int implicit_weight[48][48][2];
422 int direct_spatial_mv_pred;
425 int dist_scale_factor[32];
426 int dist_scale_factor_field[2][32];
427 int map_col_to_list0[2][16 + 32];
428 int map_col_to_list0_field[2][2][16 + 32];
431 * num_ref_idx_l0/1_active_minus1 + 1
433 unsigned int ref_count[2]; ///< counts frames or fields, depending on current mb mode
434 unsigned int list_count;
435 uint8_t *list_counts; ///< Array of list_count per MB specifying the slice type
436 Picture ref_list[2][48]; /**< 0..15: frame refs, 16..47: mbaff field refs.
437 * Reordered version of default_ref_list
438 * according to picture reordering in slice header */
439 int ref2frm[MAX_SLICES][2][64]; ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
442 GetBitContext intra_gb;
443 GetBitContext inter_gb;
444 GetBitContext *intra_gb_ptr;
445 GetBitContext *inter_gb_ptr;
447 const uint8_t *intra_pcm_ptr;
448 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.
449 DECLARE_ALIGNED(16, int16_t, mb_luma_dc)[3][16 * 2];
450 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
456 uint8_t cabac_state[1024];
458 /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0, 1, 2), 0x0? luma_cbp */
463 /* chroma_pred_mode for i4x4 or i16x16, else 0 */
464 uint8_t *chroma_pred_mode_table;
465 int last_qscale_diff;
466 uint8_t (*mvd_table[2])[2];
467 DECLARE_ALIGNED(16, uint8_t, mvd_cache)[2][5 * 8][2];
468 uint8_t *direct_table;
469 uint8_t direct_cache[5 * 8];
471 uint8_t zigzag_scan[16];
472 uint8_t zigzag_scan8x8[64];
473 uint8_t zigzag_scan8x8_cavlc[64];
474 uint8_t field_scan[16];
475 uint8_t field_scan8x8[64];
476 uint8_t field_scan8x8_cavlc[64];
477 uint8_t zigzag_scan_q0[16];
478 uint8_t zigzag_scan8x8_q0[64];
479 uint8_t zigzag_scan8x8_cavlc_q0[64];
480 uint8_t field_scan_q0[16];
481 uint8_t field_scan8x8_q0[64];
482 uint8_t field_scan8x8_cavlc_q0[64];
490 int mb_height, mb_width;
498 int deblocking_filter; ///< disable_deblocking_filter_idc with 1 <-> 0
499 int slice_alpha_c0_offset;
500 int slice_beta_offset;
502 // =============================================================
503 // Things below are not used in the MB or more inner code
507 uint8_t *rbsp_buffer[2];
508 unsigned int rbsp_buffer_size[2];
511 * Used to parse AVC variant of h264
513 int is_avc; ///< this flag is != 0 if codec is avc1
514 int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
515 int got_first; ///< this flag is != 0 if we've parsed a frame
517 int bit_depth_luma; ///< luma bit depth from sps to detect changes
518 int chroma_format_idc; ///< chroma format from sps to detect changes
520 SPS *sps_buffers[MAX_SPS_COUNT];
521 PPS *pps_buffers[MAX_PPS_COUNT];
523 int dequant_coeff_pps; ///< reinit tables when pps changes
525 uint16_t *slice_table_base;
530 int delta_poc_bottom;
533 int prev_poc_msb; ///< poc_msb of the last reference pic for POC type 0
534 int prev_poc_lsb; ///< poc_lsb of the last reference pic for POC type 0
535 int frame_num_offset; ///< for POC type 2
536 int prev_frame_num_offset; ///< for POC type 2
537 int prev_frame_num; ///< frame_num of the last pic for POC type 1/2
540 * frame_num for frames or 2 * frame_num + 1 for field pics.
545 * max_frame_num or 2 * max_frame_num for field pics.
549 int redundant_pic_count;
551 Picture default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
552 Picture *short_ref[32];
553 Picture *long_ref[32];
554 Picture *delayed_pic[MAX_DELAYED_PIC_COUNT + 2]; // FIXME size?
555 int last_pocs[MAX_DELAYED_PIC_COUNT];
556 Picture *next_output_pic;
558 int next_outputed_poc;
561 * memory management control operations buffer.
563 MMCO mmco[MAX_MMCO_COUNT];
567 int long_ref_count; ///< number of actual long term references
568 int short_ref_count; ///< number of actual short term references
573 * @name Members for slice based multithreading
576 struct H264Context *thread_context[MAX_THREADS];
579 * current slice number, used to initialize slice_num of each thread/context
584 * Max number of threads / contexts.
585 * This is equal to AVCodecContext.thread_count unless
586 * multithreaded decoding is impossible, in which case it is
591 int slice_context_count;
594 * 1 if the single thread fallback warning has already been
595 * displayed, 0 otherwise.
597 int single_decode_warning;
599 enum AVPictureType pict_type;
602 unsigned int last_ref_count[2];
606 * pic_struct in picture timing SEI message
608 SEI_PicStructType sei_pic_struct;
611 * Complement sei_pic_struct
612 * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
613 * However, soft telecined frames may have these values.
614 * This is used in an attempt to flag soft telecine progressive.
616 int prev_interlaced_frame;
619 * frame_packing_arrangment SEI message
621 int sei_frame_packing_present;
622 int frame_packing_arrangement_type;
623 int content_interpretation_type;
624 int quincunx_subsampling;
627 * Bit set of clock types for fields/frames in picture timing SEI message.
628 * For each found ct_type, appropriate bit is set (e.g., bit 1 for
634 * dpb_output_delay in picture timing SEI message, see H.264 C.2.2
636 int sei_dpb_output_delay;
639 * cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
641 int sei_cpb_removal_delay;
644 * recovery_frame_cnt from SEI message
646 * Set to -1 if no recovery point SEI message found or to number of frames
647 * before playback synchronizes. Frames having recovery point are key
650 int sei_recovery_frame_cnt;
653 * Are the SEI recovery points looking valid.
655 int valid_recovery_point;
660 * recovery_frame is the frame_num at which the next frame should
661 * be fully constructed.
663 * Set to -1 when not expecting a recovery point.
668 * We have seen an IDR, so all the following frames in coded order are correctly
671 #define FRAME_RECOVERED_IDR (1 << 0)
673 * Sufficient number of frames have been decoded since a SEI recovery point,
674 * so all the following frames in presentation order are correct.
676 #define FRAME_RECOVERED_SEI (1 << 1)
678 int frame_recovered; ///< Initial frame has been completely recovered
680 int luma_weight_flag[2]; ///< 7.4.3.2 luma_weight_lX_flag
681 int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
684 int sei_buffering_period_present; ///< Buffering period SEI flag
685 int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
687 int cur_chroma_format_idc;
688 uint8_t *bipred_scratchpad;
690 int16_t slice_row[MAX_SLICES]; ///< to detect when MAX_SLICES is too low
692 uint8_t parse_history[4];
693 int parse_history_count;
695 uint8_t *edge_emu_buffer;
696 int16_t *dc_val_base;
698 AVBufferPool *qscale_table_pool;
699 AVBufferPool *mb_type_pool;
700 AVBufferPool *motion_val_pool;
701 AVBufferPool *ref_index_pool;
704 extern const uint8_t ff_h264_chroma_qp[7][QP_MAX_NUM + 1]; ///< One chroma qp table for each possible bit depth (8-14).
705 extern const uint16_t ff_h264_mb_sizes[4];
710 int ff_h264_decode_sei(H264Context *h);
715 int ff_h264_decode_seq_parameter_set(H264Context *h);
718 * compute profile from sps
720 int ff_h264_get_profile(SPS *sps);
725 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length);
728 * Decode a network abstraction layer unit.
729 * @param consumed is the number of bytes used as input
730 * @param length is the length of the array
731 * @param dst_length is the number of decoded bytes FIXME here
732 * or a decode rbsp tailing?
733 * @return decoded bytes, might be src+1 if no escapes
735 const uint8_t *ff_h264_decode_nal(H264Context *h, const uint8_t *src,
736 int *dst_length, int *consumed, int length);
739 * Free any data that may have been allocated in the H264 context
742 void ff_h264_free_context(H264Context *h);
745 * Reconstruct bitstream slice_type.
747 int ff_h264_get_slice_type(const H264Context *h);
753 int ff_h264_alloc_tables(H264Context *h);
756 * Fill the default_ref_list.
758 int ff_h264_fill_default_ref_list(H264Context *h);
760 int ff_h264_decode_ref_pic_list_reordering(H264Context *h);
761 void ff_h264_fill_mbaff_ref_list(H264Context *h);
762 void ff_h264_remove_all_refs(H264Context *h);
765 * Execute the reference picture marking (memory management control operations).
767 int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count);
769 int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb,
772 int ff_generate_sliding_window_mmcos(H264Context *h, int first_slice);
775 * Check if the top & left blocks are available if needed & change the
776 * dc mode so it only uses the available blocks.
778 int ff_h264_check_intra4x4_pred_mode(H264Context *h);
781 * Check if the top & left blocks are available if needed & change the
782 * dc mode so it only uses the available blocks.
784 int ff_h264_check_intra_pred_mode(H264Context *h, int mode, int is_chroma);
786 void ff_h264_hl_decode_mb(H264Context *h);
787 int ff_h264_decode_extradata(H264Context *h, const uint8_t *buf, int size);
788 int ff_h264_decode_init(AVCodecContext *avctx);
789 void ff_h264_decode_init_vlc(void);
792 * Decode a macroblock
793 * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
795 int ff_h264_decode_mb_cavlc(H264Context *h);
798 * Decode a CABAC coded macroblock
799 * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
801 int ff_h264_decode_mb_cabac(H264Context *h);
803 void ff_h264_init_cabac_states(H264Context *h);
805 void ff_h264_direct_dist_scale_factor(H264Context *const h);
806 void ff_h264_direct_ref_list_init(H264Context *const h);
807 void ff_h264_pred_direct_motion(H264Context *const h, int *mb_type);
809 void ff_h264_filter_mb_fast(H264Context *h, int mb_x, int mb_y,
810 uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
811 unsigned int linesize, unsigned int uvlinesize);
812 void ff_h264_filter_mb(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);
817 * Reset SEI values at the beginning of the frame.
819 * @param h H.264 context.
821 void ff_h264_reset_sei(H264Context *h);
824 * Get stereo_mode string from the h264 frame_packing_arrangement
825 * @param h H.264 context.
827 const char* ff_h264_sei_stereo_mode(H264Context *h);
839 /* Scan8 organization:
856 * DY/DU/DV are for luma/chroma DC.
859 #define LUMA_DC_BLOCK_INDEX 48
860 #define CHROMA_DC_BLOCK_INDEX 49
862 // This table must be here because scan8[constant] must be known at compiletime
863 static const uint8_t scan8[16 * 3 + 3] = {
864 4 + 1 * 8, 5 + 1 * 8, 4 + 2 * 8, 5 + 2 * 8,
865 6 + 1 * 8, 7 + 1 * 8, 6 + 2 * 8, 7 + 2 * 8,
866 4 + 3 * 8, 5 + 3 * 8, 4 + 4 * 8, 5 + 4 * 8,
867 6 + 3 * 8, 7 + 3 * 8, 6 + 4 * 8, 7 + 4 * 8,
868 4 + 6 * 8, 5 + 6 * 8, 4 + 7 * 8, 5 + 7 * 8,
869 6 + 6 * 8, 7 + 6 * 8, 6 + 7 * 8, 7 + 7 * 8,
870 4 + 8 * 8, 5 + 8 * 8, 4 + 9 * 8, 5 + 9 * 8,
871 6 + 8 * 8, 7 + 8 * 8, 6 + 9 * 8, 7 + 9 * 8,
872 4 + 11 * 8, 5 + 11 * 8, 4 + 12 * 8, 5 + 12 * 8,
873 6 + 11 * 8, 7 + 11 * 8, 6 + 12 * 8, 7 + 12 * 8,
874 4 + 13 * 8, 5 + 13 * 8, 4 + 14 * 8, 5 + 14 * 8,
875 6 + 13 * 8, 7 + 13 * 8, 6 + 14 * 8, 7 + 14 * 8,
876 0 + 0 * 8, 0 + 5 * 8, 0 + 10 * 8
879 static av_always_inline uint32_t pack16to32(int a, int b)
882 return (b & 0xFFFF) + (a << 16);
884 return (a & 0xFFFF) + (b << 16);
888 static av_always_inline uint16_t pack8to16(int a, int b)
891 return (b & 0xFF) + (a << 8);
893 return (a & 0xFF) + (b << 8);
900 static av_always_inline int get_chroma_qp(H264Context *h, int t, int qscale)
902 return h->pps.chroma_qp_table[t][qscale];
906 * Get the predicted intra4x4 prediction mode.
908 static av_always_inline int pred_intra_mode(H264Context *h, int n)
910 const int index8 = scan8[n];
911 const int left = h->intra4x4_pred_mode_cache[index8 - 1];
912 const int top = h->intra4x4_pred_mode_cache[index8 - 8];
913 const int min = FFMIN(left, top);
915 tprintf(h->avctx, "mode:%d %d min:%d\n", left, top, min);
923 static av_always_inline void write_back_intra_pred_mode(H264Context *h)
925 int8_t *i4x4 = h->intra4x4_pred_mode + h->mb2br_xy[h->mb_xy];
926 int8_t *i4x4_cache = h->intra4x4_pred_mode_cache;
928 AV_COPY32(i4x4, i4x4_cache + 4 + 8 * 4);
929 i4x4[4] = i4x4_cache[7 + 8 * 3];
930 i4x4[5] = i4x4_cache[7 + 8 * 2];
931 i4x4[6] = i4x4_cache[7 + 8 * 1];
934 static av_always_inline void write_back_non_zero_count(H264Context *h)
936 const int mb_xy = h->mb_xy;
937 uint8_t *nnz = h->non_zero_count[mb_xy];
938 uint8_t *nnz_cache = h->non_zero_count_cache;
940 AV_COPY32(&nnz[ 0], &nnz_cache[4 + 8 * 1]);
941 AV_COPY32(&nnz[ 4], &nnz_cache[4 + 8 * 2]);
942 AV_COPY32(&nnz[ 8], &nnz_cache[4 + 8 * 3]);
943 AV_COPY32(&nnz[12], &nnz_cache[4 + 8 * 4]);
944 AV_COPY32(&nnz[16], &nnz_cache[4 + 8 * 6]);
945 AV_COPY32(&nnz[20], &nnz_cache[4 + 8 * 7]);
946 AV_COPY32(&nnz[32], &nnz_cache[4 + 8 * 11]);
947 AV_COPY32(&nnz[36], &nnz_cache[4 + 8 * 12]);
949 if (!h->chroma_y_shift) {
950 AV_COPY32(&nnz[24], &nnz_cache[4 + 8 * 8]);
951 AV_COPY32(&nnz[28], &nnz_cache[4 + 8 * 9]);
952 AV_COPY32(&nnz[40], &nnz_cache[4 + 8 * 13]);
953 AV_COPY32(&nnz[44], &nnz_cache[4 + 8 * 14]);
957 static av_always_inline void write_back_motion_list(H264Context *h,
960 int mb_type, int list)
962 int16_t(*mv_dst)[2] = &h->cur_pic.motion_val[list][b_xy];
963 int16_t(*mv_src)[2] = &h->mv_cache[list][scan8[0]];
964 AV_COPY128(mv_dst + 0 * b_stride, mv_src + 8 * 0);
965 AV_COPY128(mv_dst + 1 * b_stride, mv_src + 8 * 1);
966 AV_COPY128(mv_dst + 2 * b_stride, mv_src + 8 * 2);
967 AV_COPY128(mv_dst + 3 * b_stride, mv_src + 8 * 3);
969 uint8_t (*mvd_dst)[2] = &h->mvd_table[list][FMO ? 8 * h->mb_xy
970 : h->mb2br_xy[h->mb_xy]];
971 uint8_t(*mvd_src)[2] = &h->mvd_cache[list][scan8[0]];
972 if (IS_SKIP(mb_type)) {
975 AV_COPY64(mvd_dst, mvd_src + 8 * 3);
976 AV_COPY16(mvd_dst + 3 + 3, mvd_src + 3 + 8 * 0);
977 AV_COPY16(mvd_dst + 3 + 2, mvd_src + 3 + 8 * 1);
978 AV_COPY16(mvd_dst + 3 + 1, mvd_src + 3 + 8 * 2);
983 int8_t *ref_index = &h->cur_pic.ref_index[list][b8_xy];
984 int8_t *ref_cache = h->ref_cache[list];
985 ref_index[0 + 0 * 2] = ref_cache[scan8[0]];
986 ref_index[1 + 0 * 2] = ref_cache[scan8[4]];
987 ref_index[0 + 1 * 2] = ref_cache[scan8[8]];
988 ref_index[1 + 1 * 2] = ref_cache[scan8[12]];
992 static av_always_inline void write_back_motion(H264Context *h, int mb_type)
994 const int b_stride = h->b_stride;
995 const int b_xy = 4 * h->mb_x + 4 * h->mb_y * h->b_stride; // try mb2b(8)_xy
996 const int b8_xy = 4 * h->mb_xy;
998 if (USES_LIST(mb_type, 0)) {
999 write_back_motion_list(h, b_stride, b_xy, b8_xy, mb_type, 0);
1001 fill_rectangle(&h->cur_pic.ref_index[0][b8_xy],
1002 2, 2, 2, (uint8_t)LIST_NOT_USED, 1);
1004 if (USES_LIST(mb_type, 1))
1005 write_back_motion_list(h, b_stride, b_xy, b8_xy, mb_type, 1);
1007 if (h->slice_type_nos == AV_PICTURE_TYPE_B && CABAC(h)) {
1008 if (IS_8X8(mb_type)) {
1009 uint8_t *direct_table = &h->direct_table[4 * h->mb_xy];
1010 direct_table[1] = h->sub_mb_type[1] >> 1;
1011 direct_table[2] = h->sub_mb_type[2] >> 1;
1012 direct_table[3] = h->sub_mb_type[3] >> 1;
1017 static av_always_inline int get_dct8x8_allowed(H264Context *h)
1019 if (h->sps.direct_8x8_inference_flag)
1020 return !(AV_RN64A(h->sub_mb_type) &
1021 ((MB_TYPE_16x8 | MB_TYPE_8x16 | MB_TYPE_8x8) *
1022 0x0001000100010001ULL));
1024 return !(AV_RN64A(h->sub_mb_type) &
1025 ((MB_TYPE_16x8 | MB_TYPE_8x16 | MB_TYPE_8x8 | MB_TYPE_DIRECT2) *
1026 0x0001000100010001ULL));
1029 void ff_h264_draw_horiz_band(H264Context *h, int y, int height);
1030 int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc);
1031 int ff_pred_weight_table(H264Context *h);
1032 int ff_set_ref_count(H264Context *h);
1034 #endif /* AVCODEC_H264_H */