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 Libav.
7 * Libav 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 * Libav 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 Libav; 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"
32 #include "libavutil/thread.h"
34 #include "error_resilience.h"
36 #include "h264chroma.h"
41 #include "mpegutils.h"
44 #include "rectangle.h"
47 #define H264_MAX_PICTURE_COUNT 32
48 #define H264_MAX_THREADS 16
50 #define MAX_SPS_COUNT 32
51 #define MAX_PPS_COUNT 256
53 #define MAX_MMCO_COUNT 66
55 #define MAX_DELAYED_PIC_COUNT 16
57 /* Compiling in interlaced support reduces the speed
58 * of progressive decoding by about 2%. */
59 #define ALLOW_INTERLACE
64 * The maximum number of slices supported by the decoder.
65 * must be a power of 2
69 #ifdef ALLOW_INTERLACE
70 #define MB_MBAFF(h) h->mb_mbaff
71 #define MB_FIELD(h) h->mb_field_decoding_flag
72 #define FRAME_MBAFF(h) h->mb_aff_frame
73 #define FIELD_PICTURE(h) (h->picture_structure != PICT_FRAME)
81 #define FRAME_MBAFF(h) 0
82 #define FIELD_PICTURE(h) 0
84 #define IS_INTERLACED(mb_type) 0
90 #define FIELD_OR_MBAFF_PICTURE(h) (FRAME_MBAFF(h) || FIELD_PICTURE(h))
93 #define CABAC(h) h->pps.cabac
96 #define CHROMA422(h) (h->sps.chroma_format_idc == 2)
97 #define CHROMA444(h) (h->sps.chroma_format_idc == 3)
99 #define EXTENDED_SAR 255
101 #define MB_TYPE_REF0 MB_TYPE_ACPRED // dirty but it fits in 16 bit
102 #define MB_TYPE_8x8DCT 0x01000000
103 #define IS_REF0(a) ((a) & MB_TYPE_REF0)
104 #define IS_8x8DCT(a) ((a) & MB_TYPE_8x8DCT)
106 #define QP_MAX_NUM (51 + 2 * 6) // The maximum supported qp
119 NAL_END_SEQUENCE = 10,
121 NAL_FILLER_DATA = 12,
123 NAL_AUXILIARY_SLICE = 19,
124 NAL_FF_IGNORE = 0xff0f001,
131 SEI_TYPE_BUFFERING_PERIOD = 0, ///< buffering period (H.264, D.1.1)
132 SEI_TYPE_PIC_TIMING = 1, ///< picture timing
133 SEI_TYPE_USER_DATA_REGISTERED = 4, ///< registered user data as specified by Rec. ITU-T T.35
134 SEI_TYPE_USER_DATA_UNREGISTERED = 5, ///< unregistered user data
135 SEI_TYPE_RECOVERY_POINT = 6, ///< recovery point (frame # to decoder sync)
136 SEI_TYPE_FRAME_PACKING = 45, ///< frame packing arrangement
137 SEI_TYPE_DISPLAY_ORIENTATION = 47, ///< display orientation
141 * pic_struct in picture timing SEI message
144 SEI_PIC_STRUCT_FRAME = 0, ///< 0: %frame
145 SEI_PIC_STRUCT_TOP_FIELD = 1, ///< 1: top field
146 SEI_PIC_STRUCT_BOTTOM_FIELD = 2, ///< 2: bottom field
147 SEI_PIC_STRUCT_TOP_BOTTOM = 3, ///< 3: top field, bottom field, in that order
148 SEI_PIC_STRUCT_BOTTOM_TOP = 4, ///< 4: bottom field, top field, in that order
149 SEI_PIC_STRUCT_TOP_BOTTOM_TOP = 5, ///< 5: top field, bottom field, top field repeated, in that order
150 SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM = 6, ///< 6: bottom field, top field, bottom field repeated, in that order
151 SEI_PIC_STRUCT_FRAME_DOUBLING = 7, ///< 7: %frame doubling
152 SEI_PIC_STRUCT_FRAME_TRIPLING = 8 ///< 8: %frame tripling
156 * Sequence parameter set
162 int chroma_format_idc;
163 int transform_bypass; ///< qpprime_y_zero_transform_bypass_flag
164 int log2_max_frame_num; ///< log2_max_frame_num_minus4 + 4
165 int poc_type; ///< pic_order_cnt_type
166 int log2_max_poc_lsb; ///< log2_max_pic_order_cnt_lsb_minus4
167 int delta_pic_order_always_zero_flag;
168 int offset_for_non_ref_pic;
169 int offset_for_top_to_bottom_field;
170 int poc_cycle_length; ///< num_ref_frames_in_pic_order_cnt_cycle
171 int ref_frame_count; ///< num_ref_frames
172 int gaps_in_frame_num_allowed_flag;
173 int mb_width; ///< pic_width_in_mbs_minus1 + 1
174 int mb_height; ///< pic_height_in_map_units_minus1 + 1
175 int frame_mbs_only_flag;
176 int mb_aff; ///< mb_adaptive_frame_field_flag
177 int direct_8x8_inference_flag;
178 int crop; ///< frame_cropping_flag
180 /* those 4 are already in luma samples */
181 unsigned int crop_left; ///< frame_cropping_rect_left_offset
182 unsigned int crop_right; ///< frame_cropping_rect_right_offset
183 unsigned int crop_top; ///< frame_cropping_rect_top_offset
184 unsigned int crop_bottom; ///< frame_cropping_rect_bottom_offset
185 int vui_parameters_present_flag;
187 int video_signal_type_present_flag;
189 int colour_description_present_flag;
190 enum AVColorPrimaries color_primaries;
191 enum AVColorTransferCharacteristic color_trc;
192 enum AVColorSpace colorspace;
193 int timing_info_present_flag;
194 uint32_t num_units_in_tick;
196 int fixed_frame_rate_flag;
197 short offset_for_ref_frame[256]; // FIXME dyn aloc?
198 int bitstream_restriction_flag;
199 int num_reorder_frames;
200 int scaling_matrix_present;
201 uint8_t scaling_matrix4[6][16];
202 uint8_t scaling_matrix8[6][64];
203 int nal_hrd_parameters_present_flag;
204 int vcl_hrd_parameters_present_flag;
205 int pic_struct_present_flag;
206 int time_offset_length;
207 int cpb_cnt; ///< See H.264 E.1.2
208 int initial_cpb_removal_delay_length; ///< initial_cpb_removal_delay_length_minus1 + 1
209 int cpb_removal_delay_length; ///< cpb_removal_delay_length_minus1 + 1
210 int dpb_output_delay_length; ///< dpb_output_delay_length_minus1 + 1
211 int bit_depth_luma; ///< bit_depth_luma_minus8 + 8
212 int bit_depth_chroma; ///< bit_depth_chroma_minus8 + 8
213 int residual_color_transform_flag; ///< residual_colour_transform_flag
214 int constraint_set_flags; ///< constraint_set[0-3]_flag
215 int new; ///< flag to keep track if the decoder context needs re-init due to changed SPS
219 * Picture parameter set
223 int cabac; ///< entropy_coding_mode_flag
224 int pic_order_present; ///< pic_order_present_flag
225 int slice_group_count; ///< num_slice_groups_minus1 + 1
226 int mb_slice_group_map_type;
227 unsigned int ref_count[2]; ///< num_ref_idx_l0/1_active_minus1 + 1
228 int weighted_pred; ///< weighted_pred_flag
229 int weighted_bipred_idc;
230 int init_qp; ///< pic_init_qp_minus26 + 26
231 int init_qs; ///< pic_init_qs_minus26 + 26
232 int chroma_qp_index_offset[2];
233 int deblocking_filter_parameters_present; ///< deblocking_filter_parameters_present_flag
234 int constrained_intra_pred; ///< constrained_intra_pred_flag
235 int redundant_pic_cnt_present; ///< redundant_pic_cnt_present_flag
236 int transform_8x8_mode; ///< transform_8x8_mode_flag
237 uint8_t scaling_matrix4[6][16];
238 uint8_t scaling_matrix8[6][64];
239 uint8_t chroma_qp_table[2][64]; ///< pre-scaled (with chroma_qp_index_offset) version of qp_table
244 * Memory management control operation opcode.
246 typedef enum MMCOOpcode {
257 * Memory management control operation.
259 typedef struct MMCO {
261 int short_pic_num; ///< pic_num without wrapping (pic_num & max_pic_num)
262 int long_arg; ///< index, pic_num, or num long refs depending on opcode
265 typedef struct H264Picture {
269 AVBufferRef *qscale_table_buf;
270 int8_t *qscale_table;
272 AVBufferRef *motion_val_buf[2];
273 int16_t (*motion_val[2])[2];
275 AVBufferRef *mb_type_buf;
278 AVBufferRef *hwaccel_priv_buf;
279 void *hwaccel_picture_private; ///< hardware accelerator private data
281 AVBufferRef *ref_index_buf[2];
282 int8_t *ref_index[2];
284 int field_poc[2]; ///< top/bottom POC
285 int poc; ///< frame POC
286 int frame_num; ///< frame_num (raw frame_num from slice header)
287 int mmco_reset; /**< MMCO_RESET set this 1. Reordering code must
288 not mix pictures before and after MMCO_RESET. */
289 int pic_id; /**< pic_num (short -> no wrap version of pic_num,
290 pic_num & max_pic_num; long -> long_pic_num) */
291 int long_ref; ///< 1->long term reference 0->short term reference
292 int ref_poc[2][2][32]; ///< POCs of the frames used as reference (FIXME need per slice)
293 int ref_count[2][2]; ///< number of entries in ref_poc (FIXME need per slice)
294 int mbaff; ///< 1 -> MBAFF frame 0-> not MBAFF
295 int field_picture; ///< whether or not picture was encoded in separate fields
298 int recovered; ///< picture at IDR or recovery point + recovery count
301 typedef struct H264Ref {
312 typedef struct H264SliceContext {
313 struct H264Context *h264;
319 int slice_type_nos; ///< S free slice type (SI/SP are remapped to I/P)
320 int slice_type_fixed;
323 int chroma_qp[2]; // QPc
324 int qp_thresh; ///< QP threshold to skip loopfilter
325 int last_qscale_diff;
328 int deblocking_filter; ///< disable_deblocking_filter_idc with 1 <-> 0
329 int slice_alpha_c0_offset;
330 int slice_beta_offset;
332 // Weighted pred stuff
334 int use_weight_chroma;
335 int luma_log2_weight_denom;
336 int chroma_log2_weight_denom;
337 int luma_weight_flag[2]; ///< 7.4.3.2 luma_weight_lX_flag
338 int chroma_weight_flag[2]; ///< 7.4.3.2 chroma_weight_lX_flag
339 // The following 2 can be changed to int8_t but that causes 10cpu cycles speedloss
340 int luma_weight[48][2][2];
341 int chroma_weight[48][2][2][2];
342 int implicit_weight[48][48][2];
347 int chroma_pred_mode;
348 int intra16x16_pred_mode;
350 int8_t intra4x4_pred_mode_cache[5 * 8];
351 int8_t(*intra4x4_pred_mode);
356 int left_mb_xy[LEFT_MBS];
361 int left_type[LEFT_MBS];
363 const uint8_t *left_block;
364 int topleft_partition;
366 unsigned int topleft_samples_available;
367 unsigned int top_samples_available;
368 unsigned int topright_samples_available;
369 unsigned int left_samples_available;
371 ptrdiff_t linesize, uvlinesize;
372 ptrdiff_t mb_linesize; ///< may be equal to s->linesize or s->linesize * 2, for mbaff
373 ptrdiff_t mb_uvlinesize;
379 // index of the first MB of the next slice
384 int mb_field_decoding_flag;
385 int mb_mbaff; ///< mb_aff_frame && mb_field_decoding_flag
387 int redundant_pic_count;
390 * number of neighbors (top and/or left) that used 8x8 dct
392 int neighbor_transform_size;
394 int direct_spatial_mv_pred;
402 int dist_scale_factor[32];
403 int dist_scale_factor_field[2][32];
404 int map_col_to_list0[2][16 + 32];
405 int map_col_to_list0_field[2][2][16 + 32];
408 * num_ref_idx_l0/1_active_minus1 + 1
410 unsigned int ref_count[2]; ///< counts frames or fields, depending on current mb mode
411 unsigned int list_count;
412 H264Ref ref_list[2][48]; /**< 0..15: frame refs, 16..47: mbaff field refs.
413 * Reordered version of default_ref_list
414 * according to picture reordering in slice header */
415 int ref2frm[MAX_SLICES][2][64]; ///< reference to frame number lists, used in the loop filter, the first 2 are for -2,-1
417 const uint8_t *intra_pcm_ptr;
418 int16_t *dc_val_base;
420 uint8_t *bipred_scratchpad;
421 uint8_t *edge_emu_buffer;
422 uint8_t (*top_borders[2])[(16 * 3) * 2];
423 int bipred_scratchpad_allocated;
424 int edge_emu_buffer_allocated;
425 int top_borders_allocated[2];
428 * non zero coeff count cache.
429 * is 64 if not available.
431 DECLARE_ALIGNED(8, uint8_t, non_zero_count_cache)[15 * 8];
434 * Motion vector cache.
436 DECLARE_ALIGNED(16, int16_t, mv_cache)[2][5 * 8][2];
437 DECLARE_ALIGNED(8, int8_t, ref_cache)[2][5 * 8];
438 DECLARE_ALIGNED(16, uint8_t, mvd_cache)[2][5 * 8][2];
439 uint8_t direct_cache[5 * 8];
441 DECLARE_ALIGNED(8, uint16_t, sub_mb_type)[4];
443 ///< as a dct coeffecient is int32_t in high depth, we need to reserve twice the space.
444 DECLARE_ALIGNED(16, int16_t, mb)[16 * 48 * 2];
445 DECLARE_ALIGNED(16, int16_t, mb_luma_dc)[3][16 * 2];
446 ///< as mb is addressed by scantable[i] and scantable is uint8_t we can either
447 ///< check that i is not too large or ensure that there is some unused stuff after mb
448 int16_t mb_padding[256 * 2];
450 uint8_t (*mvd_table[2])[2];
456 uint8_t cabac_state[1024];
459 // rbsp buffer used for this slice
460 uint8_t *rbsp_buffer;
461 unsigned int rbsp_buffer_size;
467 typedef struct H264Context {
468 AVCodecContext *avctx;
469 VideoDSPContext vdsp;
470 H264DSPContext h264dsp;
471 H264ChromaContext h264chroma;
472 H264QpelContext h264qpel;
475 H264Picture DPB[H264_MAX_PICTURE_COUNT];
476 H264Picture *cur_pic_ptr;
479 H264SliceContext *slice_ctx;
482 int pixel_shift; ///< 0 for 8-bit H264, 1 for high-bit-depth H264
484 /* coded dimensions -- 16 * mb w/h */
486 int chroma_x_shift, chroma_y_shift;
489 int coded_picture_number;
492 int context_initialized;
496 int8_t(*intra4x4_pred_mode);
499 uint8_t (*non_zero_count)[48];
501 #define LIST_NOT_USED -1 // FIXME rename?
502 #define PART_NOT_AVAILABLE -2
505 * block_offset[ 0..23] for frame macroblocks
506 * block_offset[24..47] for field macroblocks
508 int block_offset[2 * (16 * 3)];
510 uint32_t *mb2b_xy; // FIXME are these 4 a good idea?
512 int b_stride; // FIXME use s->b4_stride
514 SPS sps; ///< current sps
515 PPS pps; ///< current pps
517 uint32_t dequant4_buffer[6][QP_MAX_NUM + 1][16]; // FIXME should these be moved down?
518 uint32_t dequant8_buffer[6][QP_MAX_NUM + 1][64];
519 uint32_t(*dequant4_coeff[6])[16];
520 uint32_t(*dequant8_coeff[6])[64];
522 uint16_t *slice_table; ///< slice_table_base + 2*mb_stride + 1
524 // interlacing specific flags
526 int picture_structure;
529 uint8_t *list_counts; ///< Array of list_count per MB specifying the slice type
531 /* 0x100 -> non null luma_dc, 0x80/0x40 -> non null chroma_dc (cb/cr), 0x?0 -> chroma_cbp(0, 1, 2), 0x0? luma_cbp */
534 /* chroma_pred_mode for i4x4 or i16x16, else 0 */
535 uint8_t *chroma_pred_mode_table;
536 uint8_t (*mvd_table[2])[2];
537 uint8_t *direct_table;
539 uint8_t zigzag_scan[16];
540 uint8_t zigzag_scan8x8[64];
541 uint8_t zigzag_scan8x8_cavlc[64];
542 uint8_t field_scan[16];
543 uint8_t field_scan8x8[64];
544 uint8_t field_scan8x8_cavlc[64];
545 const uint8_t *zigzag_scan_q0;
546 const uint8_t *zigzag_scan8x8_q0;
547 const uint8_t *zigzag_scan8x8_cavlc_q0;
548 const uint8_t *field_scan_q0;
549 const uint8_t *field_scan8x8_q0;
550 const uint8_t *field_scan8x8_cavlc_q0;
555 int mb_height, mb_width;
559 // =============================================================
560 // Things below are not used in the MB or more inner code
566 * Used to parse AVC variant of h264
568 int is_avc; ///< this flag is != 0 if codec is avc1
569 int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
571 int bit_depth_luma; ///< luma bit depth from sps to detect changes
572 int chroma_format_idc; ///< chroma format from sps to detect changes
574 SPS *sps_buffers[MAX_SPS_COUNT];
575 PPS *pps_buffers[MAX_PPS_COUNT];
577 int dequant_coeff_pps; ///< reinit tables when pps changes
579 uint16_t *slice_table_base;
584 int delta_poc_bottom;
587 int prev_poc_msb; ///< poc_msb of the last reference pic for POC type 0
588 int prev_poc_lsb; ///< poc_lsb of the last reference pic for POC type 0
589 int frame_num_offset; ///< for POC type 2
590 int prev_frame_num_offset; ///< for POC type 2
591 int prev_frame_num; ///< frame_num of the last pic for POC type 1/2
594 * frame_num for frames or 2 * frame_num + 1 for field pics.
599 * max_frame_num or 2 * max_frame_num for field pics.
603 H264Ref default_ref_list[2][32]; ///< base reference list for all slices of a coded picture
604 H264Picture *short_ref[32];
605 H264Picture *long_ref[32];
606 H264Picture *delayed_pic[MAX_DELAYED_PIC_COUNT + 2]; // FIXME size?
607 int last_pocs[MAX_DELAYED_PIC_COUNT];
608 H264Picture *next_output_pic;
609 int next_outputed_poc;
612 * memory management control operations buffer.
614 MMCO mmco[MAX_MMCO_COUNT];
618 int long_ref_count; ///< number of actual long term references
619 int short_ref_count; ///< number of actual short term references
622 * @name Members for slice based multithreading
626 * current slice number, used to initalize slice_num of each thread/context
631 * Max number of threads / contexts.
632 * This is equal to AVCodecContext.thread_count unless
633 * multithreaded decoding is impossible, in which case it is
638 int slice_context_count;
641 * 1 if the single thread fallback warning has already been
642 * displayed, 0 otherwise.
644 int single_decode_warning;
646 enum AVPictureType pict_type;
652 * pic_struct in picture timing SEI message
654 SEI_PicStructType sei_pic_struct;
657 * Complement sei_pic_struct
658 * SEI_PIC_STRUCT_TOP_BOTTOM and SEI_PIC_STRUCT_BOTTOM_TOP indicate interlaced frames.
659 * However, soft telecined frames may have these values.
660 * This is used in an attempt to flag soft telecine progressive.
662 int prev_interlaced_frame;
665 * frame_packing_arrangment SEI message
667 int sei_frame_packing_present;
668 int frame_packing_arrangement_type;
669 int content_interpretation_type;
670 int quincunx_subsampling;
673 * display orientation SEI message
675 int sei_display_orientation_present;
676 int sei_anticlockwise_rotation;
677 int sei_hflip, sei_vflip;
680 * User data registered by Rec. ITU-T T.35 SEI
682 int sei_reguserdata_afd_present;
683 uint8_t active_format_description;
684 int a53_caption_size;
685 uint8_t *a53_caption;
688 * Bit set of clock types for fields/frames in picture timing SEI message.
689 * For each found ct_type, appropriate bit is set (e.g., bit 1 for
695 * dpb_output_delay in picture timing SEI message, see H.264 C.2.2
697 int sei_dpb_output_delay;
700 * cpb_removal_delay in picture timing SEI message, see H.264 C.1.2
702 int sei_cpb_removal_delay;
705 * recovery_frame_cnt from SEI message
707 * Set to -1 if no recovery point SEI message found or to number of frames
708 * before playback synchronizes. Frames having recovery point are key
711 int sei_recovery_frame_cnt;
714 * recovery_frame is the frame_num at which the next frame should
715 * be fully constructed.
717 * Set to -1 when not expecting a recovery point.
722 * We have seen an IDR, so all the following frames in coded order are correctly
725 #define FRAME_RECOVERED_IDR (1 << 0)
727 * Sufficient number of frames have been decoded since a SEI recovery point,
728 * so all the following frames in presentation order are correct.
730 #define FRAME_RECOVERED_SEI (1 << 1)
732 int frame_recovered; ///< Initial frame has been completely recovered
734 /* for frame threading, this is set to 1
735 * after finish_setup() has been called, so we cannot modify
736 * some context properties (which are supposed to stay constant between
741 int sei_buffering_period_present; ///< Buffering period SEI flag
742 int initial_cpb_removal_delay[32]; ///< Initial timestamps for CPBs
746 AVBufferPool *qscale_table_pool;
747 AVBufferPool *mb_type_pool;
748 AVBufferPool *motion_val_pool;
749 AVBufferPool *ref_index_pool;
751 /* Motion Estimation */
752 qpel_mc_func (*qpel_put)[16];
753 qpel_mc_func (*qpel_avg)[16];
756 extern const uint8_t ff_h264_chroma_qp[3][QP_MAX_NUM + 1]; ///< One chroma qp table for each supported bit depth (8, 9, 10).
757 extern const uint16_t ff_h264_mb_sizes[4];
762 int ff_h264_decode_sei(H264Context *h);
767 int ff_h264_decode_seq_parameter_set(H264Context *h);
770 * compute profile from sps
772 int ff_h264_get_profile(SPS *sps);
777 int ff_h264_decode_picture_parameter_set(H264Context *h, int bit_length);
780 * Decode a network abstraction layer unit.
781 * @param consumed is the number of bytes used as input
782 * @param length is the length of the array
783 * @param dst_length is the number of decoded bytes FIXME here
784 * or a decode rbsp tailing?
785 * @return decoded bytes, might be src+1 if no escapes
787 const uint8_t *ff_h264_decode_nal(H264Context *h, H264SliceContext *sl, const uint8_t *src,
788 int *dst_length, int *consumed, int length);
791 * Free any data that may have been allocated in the H264 context
794 void ff_h264_free_context(H264Context *h);
797 * Reconstruct bitstream slice_type.
799 int ff_h264_get_slice_type(const H264SliceContext *sl);
805 int ff_h264_alloc_tables(H264Context *h);
808 * Fill the default_ref_list.
810 int ff_h264_fill_default_ref_list(H264Context *h, H264SliceContext *sl);
812 int ff_h264_decode_ref_pic_list_reordering(H264Context *h, H264SliceContext *sl);
813 void ff_h264_fill_mbaff_ref_list(H264Context *h, H264SliceContext *sl);
814 void ff_h264_remove_all_refs(H264Context *h);
817 * Execute the reference picture marking (memory management control operations).
819 int ff_h264_execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count);
821 int ff_h264_decode_ref_pic_marking(H264Context *h, GetBitContext *gb,
824 int ff_generate_sliding_window_mmcos(H264Context *h, int first_slice);
827 * Check if the top & left blocks are available if needed & change the
828 * dc mode so it only uses the available blocks.
830 int ff_h264_check_intra4x4_pred_mode(const H264Context *h, H264SliceContext *sl);
833 * Check if the top & left blocks are available if needed & change the
834 * dc mode so it only uses the available blocks.
836 int ff_h264_check_intra_pred_mode(const H264Context *h, H264SliceContext *sl,
837 int mode, int is_chroma);
839 void ff_h264_hl_decode_mb(const H264Context *h, H264SliceContext *sl);
840 int ff_h264_decode_extradata(H264Context *h);
841 int ff_h264_decode_init(AVCodecContext *avctx);
842 void ff_h264_decode_init_vlc(void);
845 * Decode a macroblock
846 * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
848 int ff_h264_decode_mb_cavlc(const H264Context *h, H264SliceContext *sl);
851 * Decode a CABAC coded macroblock
852 * @return 0 if OK, ER_AC_ERROR / ER_DC_ERROR / ER_MV_ERROR on error
854 int ff_h264_decode_mb_cabac(const H264Context *h, H264SliceContext *sl);
856 void ff_h264_init_cabac_states(const H264Context *h, H264SliceContext *sl);
858 void h264_init_dequant_tables(H264Context *h);
860 void ff_h264_direct_dist_scale_factor(const H264Context *const h, H264SliceContext *sl);
861 void ff_h264_direct_ref_list_init(const H264Context *const h, H264SliceContext *sl);
862 void ff_h264_pred_direct_motion(const H264Context *const h, H264SliceContext *sl,
865 void ff_h264_filter_mb_fast(const H264Context *h, H264SliceContext *sl, int mb_x, int mb_y,
866 uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
867 unsigned int linesize, unsigned int uvlinesize);
868 void ff_h264_filter_mb(const H264Context *h, H264SliceContext *sl, int mb_x, int mb_y,
869 uint8_t *img_y, uint8_t *img_cb, uint8_t *img_cr,
870 unsigned int linesize, unsigned int uvlinesize);
873 * Reset SEI values at the beginning of the frame.
875 * @param h H.264 context.
877 void ff_h264_reset_sei(H264Context *h);
889 /* Scan8 organization:
906 * DY/DU/DV are for luma/chroma DC.
909 #define LUMA_DC_BLOCK_INDEX 48
910 #define CHROMA_DC_BLOCK_INDEX 49
912 // This table must be here because scan8[constant] must be known at compiletime
913 static const uint8_t scan8[16 * 3 + 3] = {
914 4 + 1 * 8, 5 + 1 * 8, 4 + 2 * 8, 5 + 2 * 8,
915 6 + 1 * 8, 7 + 1 * 8, 6 + 2 * 8, 7 + 2 * 8,
916 4 + 3 * 8, 5 + 3 * 8, 4 + 4 * 8, 5 + 4 * 8,
917 6 + 3 * 8, 7 + 3 * 8, 6 + 4 * 8, 7 + 4 * 8,
918 4 + 6 * 8, 5 + 6 * 8, 4 + 7 * 8, 5 + 7 * 8,
919 6 + 6 * 8, 7 + 6 * 8, 6 + 7 * 8, 7 + 7 * 8,
920 4 + 8 * 8, 5 + 8 * 8, 4 + 9 * 8, 5 + 9 * 8,
921 6 + 8 * 8, 7 + 8 * 8, 6 + 9 * 8, 7 + 9 * 8,
922 4 + 11 * 8, 5 + 11 * 8, 4 + 12 * 8, 5 + 12 * 8,
923 6 + 11 * 8, 7 + 11 * 8, 6 + 12 * 8, 7 + 12 * 8,
924 4 + 13 * 8, 5 + 13 * 8, 4 + 14 * 8, 5 + 14 * 8,
925 6 + 13 * 8, 7 + 13 * 8, 6 + 14 * 8, 7 + 14 * 8,
926 0 + 0 * 8, 0 + 5 * 8, 0 + 10 * 8
929 static av_always_inline uint32_t pack16to32(int a, int b)
932 return (b & 0xFFFF) + (a << 16);
934 return (a & 0xFFFF) + (b << 16);
938 static av_always_inline uint16_t pack8to16(int a, int b)
941 return (b & 0xFF) + (a << 8);
943 return (a & 0xFF) + (b << 8);
950 static av_always_inline int get_chroma_qp(const H264Context *h, int t, int qscale)
952 return h->pps.chroma_qp_table[t][qscale];
956 * Get the predicted intra4x4 prediction mode.
958 static av_always_inline int pred_intra_mode(const H264Context *h,
959 H264SliceContext *sl, int n)
961 const int index8 = scan8[n];
962 const int left = sl->intra4x4_pred_mode_cache[index8 - 1];
963 const int top = sl->intra4x4_pred_mode_cache[index8 - 8];
964 const int min = FFMIN(left, top);
966 ff_tlog(h->avctx, "mode:%d %d min:%d\n", left, top, min);
974 static av_always_inline void write_back_intra_pred_mode(const H264Context *h,
975 H264SliceContext *sl)
977 int8_t *i4x4 = sl->intra4x4_pred_mode + h->mb2br_xy[sl->mb_xy];
978 int8_t *i4x4_cache = sl->intra4x4_pred_mode_cache;
980 AV_COPY32(i4x4, i4x4_cache + 4 + 8 * 4);
981 i4x4[4] = i4x4_cache[7 + 8 * 3];
982 i4x4[5] = i4x4_cache[7 + 8 * 2];
983 i4x4[6] = i4x4_cache[7 + 8 * 1];
986 static av_always_inline void write_back_non_zero_count(const H264Context *h,
987 H264SliceContext *sl)
989 const int mb_xy = sl->mb_xy;
990 uint8_t *nnz = h->non_zero_count[mb_xy];
991 uint8_t *nnz_cache = sl->non_zero_count_cache;
993 AV_COPY32(&nnz[ 0], &nnz_cache[4 + 8 * 1]);
994 AV_COPY32(&nnz[ 4], &nnz_cache[4 + 8 * 2]);
995 AV_COPY32(&nnz[ 8], &nnz_cache[4 + 8 * 3]);
996 AV_COPY32(&nnz[12], &nnz_cache[4 + 8 * 4]);
997 AV_COPY32(&nnz[16], &nnz_cache[4 + 8 * 6]);
998 AV_COPY32(&nnz[20], &nnz_cache[4 + 8 * 7]);
999 AV_COPY32(&nnz[32], &nnz_cache[4 + 8 * 11]);
1000 AV_COPY32(&nnz[36], &nnz_cache[4 + 8 * 12]);
1002 if (!h->chroma_y_shift) {
1003 AV_COPY32(&nnz[24], &nnz_cache[4 + 8 * 8]);
1004 AV_COPY32(&nnz[28], &nnz_cache[4 + 8 * 9]);
1005 AV_COPY32(&nnz[40], &nnz_cache[4 + 8 * 13]);
1006 AV_COPY32(&nnz[44], &nnz_cache[4 + 8 * 14]);
1010 static av_always_inline void write_back_motion_list(const H264Context *h,
1011 H264SliceContext *sl,
1013 int b_xy, int b8_xy,
1014 int mb_type, int list)
1016 int16_t(*mv_dst)[2] = &h->cur_pic.motion_val[list][b_xy];
1017 int16_t(*mv_src)[2] = &sl->mv_cache[list][scan8[0]];
1018 AV_COPY128(mv_dst + 0 * b_stride, mv_src + 8 * 0);
1019 AV_COPY128(mv_dst + 1 * b_stride, mv_src + 8 * 1);
1020 AV_COPY128(mv_dst + 2 * b_stride, mv_src + 8 * 2);
1021 AV_COPY128(mv_dst + 3 * b_stride, mv_src + 8 * 3);
1023 uint8_t (*mvd_dst)[2] = &sl->mvd_table[list][FMO ? 8 * sl->mb_xy
1024 : h->mb2br_xy[sl->mb_xy]];
1025 uint8_t(*mvd_src)[2] = &sl->mvd_cache[list][scan8[0]];
1026 if (IS_SKIP(mb_type)) {
1027 AV_ZERO128(mvd_dst);
1029 AV_COPY64(mvd_dst, mvd_src + 8 * 3);
1030 AV_COPY16(mvd_dst + 3 + 3, mvd_src + 3 + 8 * 0);
1031 AV_COPY16(mvd_dst + 3 + 2, mvd_src + 3 + 8 * 1);
1032 AV_COPY16(mvd_dst + 3 + 1, mvd_src + 3 + 8 * 2);
1037 int8_t *ref_index = &h->cur_pic.ref_index[list][b8_xy];
1038 int8_t *ref_cache = sl->ref_cache[list];
1039 ref_index[0 + 0 * 2] = ref_cache[scan8[0]];
1040 ref_index[1 + 0 * 2] = ref_cache[scan8[4]];
1041 ref_index[0 + 1 * 2] = ref_cache[scan8[8]];
1042 ref_index[1 + 1 * 2] = ref_cache[scan8[12]];
1046 static av_always_inline void write_back_motion(const H264Context *h,
1047 H264SliceContext *sl,
1050 const int b_stride = h->b_stride;
1051 const int b_xy = 4 * sl->mb_x + 4 * sl->mb_y * h->b_stride; // try mb2b(8)_xy
1052 const int b8_xy = 4 * sl->mb_xy;
1054 if (USES_LIST(mb_type, 0)) {
1055 write_back_motion_list(h, sl, b_stride, b_xy, b8_xy, mb_type, 0);
1057 fill_rectangle(&h->cur_pic.ref_index[0][b8_xy],
1058 2, 2, 2, (uint8_t)LIST_NOT_USED, 1);
1060 if (USES_LIST(mb_type, 1))
1061 write_back_motion_list(h, sl, b_stride, b_xy, b8_xy, mb_type, 1);
1063 if (sl->slice_type_nos == AV_PICTURE_TYPE_B && CABAC(h)) {
1064 if (IS_8X8(mb_type)) {
1065 uint8_t *direct_table = &h->direct_table[4 * sl->mb_xy];
1066 direct_table[1] = sl->sub_mb_type[1] >> 1;
1067 direct_table[2] = sl->sub_mb_type[2] >> 1;
1068 direct_table[3] = sl->sub_mb_type[3] >> 1;
1073 static av_always_inline int get_dct8x8_allowed(const H264Context *h, H264SliceContext *sl)
1075 if (h->sps.direct_8x8_inference_flag)
1076 return !(AV_RN64A(sl->sub_mb_type) &
1077 ((MB_TYPE_16x8 | MB_TYPE_8x16 | MB_TYPE_8x8) *
1078 0x0001000100010001ULL));
1080 return !(AV_RN64A(sl->sub_mb_type) &
1081 ((MB_TYPE_16x8 | MB_TYPE_8x16 | MB_TYPE_8x8 | MB_TYPE_DIRECT2) *
1082 0x0001000100010001ULL));
1085 int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup);
1087 int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src);
1088 void ff_h264_unref_picture(H264Context *h, H264Picture *pic);
1090 int ff_h264_slice_context_init(H264Context *h, H264SliceContext *sl);
1092 void ff_h264_draw_horiz_band(const H264Context *h, H264SliceContext *sl, int y, int height);
1093 int ff_init_poc(H264Context *h, int pic_field_poc[2], int *pic_poc);
1094 int ff_pred_weight_table(H264Context *h, H264SliceContext *sl);
1095 int ff_set_ref_count(H264Context *h, H264SliceContext *sl);
1097 int ff_h264_decode_slice_header(H264Context *h, H264SliceContext *sl);
1098 int ff_h264_execute_decode_slices(H264Context *h, unsigned context_count);
1099 int ff_h264_update_thread_context(AVCodecContext *dst,
1100 const AVCodecContext *src);
1102 void ff_h264_flush_change(H264Context *h);
1104 void ff_h264_free_tables(H264Context *h);
1106 #endif /* AVCODEC_H264_H */