4 * Copyright (C) 2012 - 2013 Guillaume Martres
6 * This file is part of Libav.
8 * Libav is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * Libav is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #ifndef AVCODEC_HEVC_H
24 #define AVCODEC_HEVC_H
29 #include "libavutil/buffer.h"
30 #include "libavutil/md5.h"
41 #define MAX_DPB_SIZE 16 // A.4.1
47 #define MAX_SUB_LAYERS 7
48 #define MAX_VPS_COUNT 16
49 #define MAX_SPS_COUNT 32
50 #define MAX_PPS_COUNT 256
51 #define MAX_SHORT_TERM_RPS_COUNT 64
52 #define MAX_CU_SIZE 128
54 //TODO: check if this is really the maximum
55 #define MAX_TRANSFORM_DEPTH 5
57 #define MAX_TB_SIZE 32
58 #define MAX_PB_SIZE 64
59 #define MAX_LOG2_CTB_SIZE 6
61 #define DEFAULT_INTRA_TC_OFFSET 2
63 #define HEVC_CONTEXTS 183
65 #define MRG_MAX_NUM_CANDS 5
70 #define EPEL_EXTRA_BEFORE 1
71 #define EPEL_EXTRA_AFTER 2
74 #define EDGE_EMU_BUFFER_STRIDE 80
77 * Value of the luma sample at position (x, y) in the 2D array tab.
79 #define SAMPLE(tab, x, y) ((tab)[(y) * s->sps->width + (x)])
80 #define SAMPLE_CTB(tab, x, y) ((tab)[(y) * min_cb_width + (x)])
81 #define SAMPLE_CBF(tab, x, y) ((tab)[((y) & ((1<<log2_trafo_size)-1)) * MAX_CU_SIZE + ((x) & ((1<<log2_trafo_size)-1))])
83 #define IS_IDR(s) (s->nal_unit_type == NAL_IDR_W_RADL || s->nal_unit_type == NAL_IDR_N_LP)
84 #define IS_BLA(s) (s->nal_unit_type == NAL_BLA_W_RADL || s->nal_unit_type == NAL_BLA_W_LP || \
85 s->nal_unit_type == NAL_BLA_N_LP)
86 #define IS_IRAP(s) (s->nal_unit_type >= 16 && s->nal_unit_type <= 23)
89 * Table 7-3: NAL unit type codes
142 SPLIT_CODING_UNIT_FLAG,
143 CU_TRANSQUANT_BYPASS_FLAG,
149 PREV_INTRA_LUMA_PRED_FLAG,
151 REM_INTRA_LUMA_PRED_MODE,
152 INTRA_CHROMA_PRED_MODE,
158 ABS_MVD_GREATER0_FLAG,
159 ABS_MVD_GREATER1_FLAG,
163 NO_RESIDUAL_DATA_FLAG,
164 SPLIT_TRANSFORM_FLAG,
168 LAST_SIGNIFICANT_COEFF_X_PREFIX,
169 LAST_SIGNIFICANT_COEFF_Y_PREFIX,
170 LAST_SIGNIFICANT_COEFF_X_SUFFIX,
171 LAST_SIGNIFICANT_COEFF_Y_SUFFIX,
172 SIGNIFICANT_COEFF_GROUP_FLAG,
173 SIGNIFICANT_COEFF_FLAG,
174 COEFF_ABS_LEVEL_GREATER1_FLAG,
175 COEFF_ABS_LEVEL_GREATER2_FLAG,
176 COEFF_ABS_LEVEL_REMAINING,
260 typedef struct ShortTermRPS {
261 int num_negative_pics;
263 int32_t delta_poc[32];
267 typedef struct LongTermRPS {
273 typedef struct RefPicList {
274 struct HEVCFrame *ref[MAX_REFS];
276 int isLongTerm[MAX_REFS];
280 typedef struct RefPicListTab {
281 RefPicList refPicList[2];
284 typedef struct HEVCWindow {
294 int overscan_info_present_flag;
295 int overscan_appropriate_flag;
297 int video_signal_type_present_flag;
299 int video_full_range_flag;
300 int colour_description_present_flag;
301 uint8_t colour_primaries;
302 uint8_t transfer_characteristic;
303 uint8_t matrix_coeffs;
305 int chroma_loc_info_present_flag;
306 int chroma_sample_loc_type_top_field;
307 int chroma_sample_loc_type_bottom_field;
308 int neutra_chroma_indication_flag;
311 int frame_field_info_present_flag;
313 int default_display_window_flag;
314 HEVCWindow def_disp_win;
316 int vui_timing_info_present_flag;
317 uint32_t vui_num_units_in_tick;
318 uint32_t vui_time_scale;
319 int vui_poc_proportional_to_timing_flag;
320 int vui_num_ticks_poc_diff_one_minus1;
321 int vui_hrd_parameters_present_flag;
323 int bitstream_restriction_flag;
324 int tiles_fixed_structure_flag;
325 int motion_vectors_over_pic_boundaries_flag;
326 int restricted_ref_pic_lists_flag;
327 int min_spatial_segmentation_idc;
328 int max_bytes_per_pic_denom;
329 int max_bits_per_min_cu_denom;
330 int log2_max_mv_length_horizontal;
331 int log2_max_mv_length_vertical;
334 typedef struct PTLCommon {
335 uint8_t profile_space;
338 uint8_t profile_compatibility_flag[32];
340 uint8_t progressive_source_flag;
341 uint8_t interlaced_source_flag;
342 uint8_t non_packed_constraint_flag;
343 uint8_t frame_only_constraint_flag;
347 PTLCommon general_ptl;
348 PTLCommon sub_layer_ptl[MAX_SUB_LAYERS];
350 uint8_t sub_layer_profile_present_flag[MAX_SUB_LAYERS];
351 uint8_t sub_layer_level_present_flag[MAX_SUB_LAYERS];
354 typedef struct HEVCVPS {
355 uint8_t vps_temporal_id_nesting_flag;
357 int vps_max_sub_layers; ///< vps_max_temporal_layers_minus1 + 1
360 int vps_sub_layer_ordering_info_present_flag;
361 unsigned int vps_max_dec_pic_buffering[MAX_SUB_LAYERS];
362 unsigned int vps_num_reorder_pics[MAX_SUB_LAYERS];
363 unsigned int vps_max_latency_increase[MAX_SUB_LAYERS];
364 int vps_max_layer_id;
365 int vps_num_layer_sets; ///< vps_num_layer_sets_minus1 + 1
366 uint8_t vps_timing_info_present_flag;
367 uint32_t vps_num_units_in_tick;
368 uint32_t vps_time_scale;
369 uint8_t vps_poc_proportional_to_timing_flag;
370 int vps_num_ticks_poc_diff_one; ///< vps_num_ticks_poc_diff_one_minus1 + 1
371 int vps_num_hrd_parameters;
374 typedef struct ScalingList {
375 /* This is a little wasteful, since sizeID 0 only needs 8 coeffs,
376 * and size ID 3 only has 2 arrays, not 6. */
377 uint8_t sl[4][6][64];
381 typedef struct HEVCSPS {
383 int chroma_format_idc;
384 uint8_t separate_colour_plane_flag;
386 ///< output (i.e. cropped) values
387 int output_width, output_height;
388 HEVCWindow output_window;
390 HEVCWindow pic_conf_win;
394 enum AVPixelFormat pix_fmt;
396 unsigned int log2_max_poc_lsb;
397 int pcm_enabled_flag;
401 int max_dec_pic_buffering;
402 int num_reorder_pics;
403 int max_latency_increase;
404 } temporal_layer[MAX_SUB_LAYERS];
409 uint8_t scaling_list_enable_flag;
410 ScalingList scaling_list;
412 unsigned int nb_st_rps;
413 ShortTermRPS st_rps[MAX_SHORT_TERM_RPS_COUNT];
415 uint8_t amp_enabled_flag;
418 uint8_t long_term_ref_pics_present_flag;
419 uint16_t lt_ref_pic_poc_lsb_sps[32];
420 uint8_t used_by_curr_pic_lt_sps_flag[32];
421 uint8_t num_long_term_ref_pics_sps;
425 uint8_t bit_depth_chroma;
426 unsigned int log2_min_pcm_cb_size;
427 unsigned int log2_max_pcm_cb_size;
428 uint8_t loop_filter_disable_flag;
430 uint8_t sps_temporal_mvp_enabled_flag;
431 uint8_t sps_strong_intra_smoothing_enable_flag;
433 unsigned int log2_min_cb_size;
434 unsigned int log2_diff_max_min_coding_block_size;
435 unsigned int log2_min_tb_size;
436 unsigned int log2_max_trafo_size;
437 unsigned int log2_ctb_size;
438 unsigned int log2_min_pu_size;
440 int max_transform_hierarchy_depth_inter;
441 int max_transform_hierarchy_depth_intra;
443 ///< coded frame dimension in various units
462 typedef struct HEVCPPS {
463 int sps_id; ///< seq_parameter_set_id
465 uint8_t sign_data_hiding_flag;
467 uint8_t cabac_init_present_flag;
469 int num_ref_idx_l0_default_active; ///< num_ref_idx_l0_default_active_minus1 + 1
470 int num_ref_idx_l1_default_active; ///< num_ref_idx_l1_default_active_minus1 + 1
471 int pic_init_qp_minus26;
473 uint8_t constrained_intra_pred_flag;
474 uint8_t transform_skip_enabled_flag;
476 uint8_t cu_qp_delta_enabled_flag;
477 int diff_cu_qp_delta_depth;
481 uint8_t pic_slice_level_chroma_qp_offsets_present_flag;
482 uint8_t weighted_pred_flag;
483 uint8_t weighted_bipred_flag;
484 uint8_t output_flag_present_flag;
485 uint8_t transquant_bypass_enable_flag;
487 uint8_t dependent_slice_segments_enabled_flag;
488 uint8_t tiles_enabled_flag;
489 uint8_t entropy_coding_sync_enabled_flag;
491 int num_tile_columns; ///< num_tile_columns_minus1 + 1
492 int num_tile_rows; ///< num_tile_rows_minus1 + 1
493 uint8_t uniform_spacing_flag;
494 uint8_t loop_filter_across_tiles_enabled_flag;
496 uint8_t seq_loop_filter_across_slices_enabled_flag;
498 uint8_t deblocking_filter_control_present_flag;
499 uint8_t deblocking_filter_override_enabled_flag;
501 int beta_offset; ///< beta_offset_div2 * 2
502 int tc_offset; ///< tc_offset_div2 * 2
504 uint8_t scaling_list_data_present_flag;
505 ScalingList scaling_list;
507 uint8_t lists_modification_present_flag;
508 int log2_parallel_merge_level; ///< log2_parallel_merge_level_minus2 + 2
509 int num_extra_slice_header_bits;
510 uint8_t slice_header_extension_present_flag;
512 // Inferred parameters
513 int *column_width; ///< ColumnWidth
514 int *row_height; ///< RowHeight
515 int *col_bd; ///< ColBd
516 int *row_bd; ///< RowBd
519 int *ctb_addr_rs_to_ts; ///< CtbAddrRSToTS
520 int *ctb_addr_ts_to_rs; ///< CtbAddrTSToRS
521 int *tile_id; ///< TileId
522 int *tile_pos_rs; ///< TilePosRS
523 int *min_cb_addr_zs; ///< MinCbAddrZS
524 int *min_tb_addr_zs; ///< MinTbAddrZS
527 typedef struct SliceHeader {
530 ///< address (in raster order) of the first block in the current slice segment
531 unsigned int slice_segment_addr;
532 ///< address (in raster order) of the first block in the current slice
533 unsigned int slice_addr;
535 enum SliceType slice_type;
537 int pic_order_cnt_lsb;
539 uint8_t first_slice_in_pic_flag;
540 uint8_t dependent_slice_segment_flag;
541 uint8_t pic_output_flag;
542 uint8_t colour_plane_id;
544 ///< RPS coded in the slice header itself is stored here
545 ShortTermRPS slice_rps;
546 const ShortTermRPS *short_term_rps;
547 LongTermRPS long_term_rps;
548 unsigned int list_entry_lx[2][32];
550 uint8_t rpl_modification_flag[2];
551 uint8_t no_output_of_prior_pics_flag;
552 uint8_t slice_temporal_mvp_enabled_flag;
554 unsigned int nb_refs[2];
556 uint8_t slice_sample_adaptive_offset_flag[3];
557 uint8_t mvd_l1_zero_flag;
559 uint8_t cabac_init_flag;
560 uint8_t disable_deblocking_filter_flag; ///< slice_header_disable_deblocking_filter_flag
561 uint8_t slice_loop_filter_across_slices_enabled_flag;
562 uint8_t collocated_list;
564 unsigned int collocated_ref_idx;
567 int slice_cb_qp_offset;
568 int slice_cr_qp_offset;
570 int beta_offset; ///< beta_offset_div2 * 2
571 int tc_offset; ///< tc_offset_div2 * 2
573 unsigned int max_num_merge_cand; ///< 5 - 5_minus_max_num_merge_cand
575 int num_entry_point_offsets;
579 uint8_t luma_log2_weight_denom;
580 int16_t chroma_log2_weight_denom;
582 int16_t luma_weight_l0[16];
583 int16_t chroma_weight_l0[16][2];
584 int16_t chroma_weight_l1[16][2];
585 int16_t luma_weight_l1[16];
587 int16_t luma_offset_l0[16];
588 int16_t chroma_offset_l0[16][2];
590 int16_t luma_offset_l1[16];
591 int16_t chroma_offset_l1[16][2];
593 int slice_ctb_addr_rs;
596 typedef struct CodingTree {
597 int depth; ///< ctDepth
600 typedef struct CodingUnit {
604 enum PredMode pred_mode; ///< PredMode
605 enum PartMode part_mode; ///< PartMode
607 uint8_t rqt_root_cbf;
611 // Inferred parameters
612 uint8_t intra_split_flag; ///< IntraSplitFlag
613 uint8_t max_trafo_depth; ///< MaxTrafoDepth
614 uint8_t cu_transquant_bypass_flag;
618 int16_t x; ///< horizontal component of motion vector
619 int16_t y; ///< vertical component of motion vector
622 typedef struct MvField {
629 typedef struct NeighbourAvailable {
630 int cand_bottom_left;
635 int cand_up_right_sap;
636 } NeighbourAvailable;
638 typedef struct PredictionUnit {
640 int rem_intra_luma_pred_mode;
641 uint8_t intra_pred_mode[4];
644 uint8_t intra_pred_mode_c;
647 typedef struct TransformTree {
648 uint8_t cbf_cb[MAX_TRANSFORM_DEPTH][MAX_CU_SIZE * MAX_CU_SIZE];
649 uint8_t cbf_cr[MAX_TRANSFORM_DEPTH][MAX_CU_SIZE * MAX_CU_SIZE];
652 // Inferred parameters
653 uint8_t inter_split_flag;
656 typedef struct TransformUnit {
659 // Inferred parameters;
660 int cur_intra_pred_mode;
661 uint8_t is_cu_qp_delta_coded;
664 typedef struct DBParams {
669 #define HEVC_FRAME_FLAG_OUTPUT (1 << 0)
670 #define HEVC_FRAME_FLAG_SHORT_REF (1 << 1)
671 #define HEVC_FRAME_FLAG_LONG_REF (1 << 2)
673 typedef struct HEVCFrame {
677 RefPicList *refPicList;
678 RefPicListTab **rpl_tab;
681 struct HEVCFrame *collocated_ref;
685 AVBufferRef *tab_mvf_buf;
686 AVBufferRef *rpl_tab_buf;
687 AVBufferRef *rpl_buf;
690 * A sequence counter, so that old frames are output first
696 * A combination of HEVC_FRAME_FLAG_*
701 typedef struct HEVCNAL {
702 uint8_t *rbsp_buffer;
703 int rbsp_buffer_size;
711 typedef struct HEVCPredContext {
712 void (*intra_pred)(struct HEVCContext *s, int x0, int y0,
713 int log2_size, int c_idx);
715 void (*pred_planar[4])(uint8_t *src, const uint8_t *top,
716 const uint8_t *left, ptrdiff_t stride);
717 void (*pred_dc)(uint8_t *src, const uint8_t *top, const uint8_t *left,
718 ptrdiff_t stride, int log2_size, int c_idx);
719 void (*pred_angular[4])(uint8_t *src, const uint8_t *top,
720 const uint8_t *left, ptrdiff_t stride,
721 int c_idx, int mode);
724 typedef struct HEVCLocalContext {
725 DECLARE_ALIGNED(16, int16_t, mc_buffer[(MAX_PB_SIZE + 7) * MAX_PB_SIZE]);
726 uint8_t cabac_state[HEVC_CONTEXTS];
728 uint8_t first_qp_group;
739 uint8_t ctb_left_flag;
741 uint8_t ctb_up_right_flag;
742 uint8_t ctb_up_left_flag;
743 int start_of_tiles_x;
746 /* +7 is for subpixel interpolation, *2 for high bit depths */
747 DECLARE_ALIGNED(32, uint8_t, edge_emu_buffer)[(MAX_PB_SIZE + 7) * EDGE_EMU_BUFFER_STRIDE * 2];
751 NeighbourAvailable na;
753 uint8_t slice_or_tiles_left_boundary;
754 uint8_t slice_or_tiles_up_boundary;
757 typedef struct HEVCContext {
758 const AVClass *c; // needed by private avoptions
759 AVCodecContext *avctx;
761 HEVCLocalContext HEVClc;
763 uint8_t cabac_state[HEVC_CONTEXTS];
765 /** 1 if the independent slice segment header was successfully parsed */
766 uint8_t slice_initialized;
771 AVFrame *output_frame;
776 AVBufferRef *vps_list[MAX_VPS_COUNT];
777 AVBufferRef *sps_list[MAX_SPS_COUNT];
778 AVBufferRef *pps_list[MAX_PPS_COUNT];
780 AVBufferPool *tab_mvf_pool;
781 AVBufferPool *rpl_tab_pool;
783 ///< candidate references for the current frame
789 enum NALUnitType nal_unit_type;
790 int temporal_id; ///< temporal_id_plus1 - 1
795 int slice_idx; ///< number of the slice being currently decoded
796 int eos; ///< current packet contains an EOS/EOB NAL
804 HEVCDSPContext hevcdsp;
805 VideoDSPContext vdsp;
808 uint8_t *split_cu_flag;
809 uint8_t *horizontal_bs;
810 uint8_t *vertical_bs;
812 int32_t *tab_slice_address;
816 uint8_t *tab_ct_depth;
820 uint8_t *cbf_luma; // cbf_luma of colocated TU
823 // CTB-level flags affecting loop filter operation
824 uint8_t *filter_slice_edges;
826 /** used on BE to byteswap the lines for checksumming */
827 uint8_t *checksum_buf;
828 int checksum_buf_size;
831 * Sequence counters for decoded and output frames, so that old
832 * frames are output first after a POC reset
841 // for checking the frame checksums
842 struct AVMD5 *md5_ctx;
846 uint8_t context_initialized;
847 uint8_t is_nalff; ///< this flag is != 0 if bitstream is encapsulated
848 ///< as a format defined in 14496-15
849 int apply_defdispwin;
851 int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
854 /** frame packing arrangement variables */
855 int sei_frame_packing_present;
856 int frame_packing_arrangement_type;
857 int content_interpretation_type;
858 int quincunx_subsampling;
861 int ff_hevc_decode_short_term_rps(HEVCContext *s, ShortTermRPS *rps,
862 const HEVCSPS *sps, int is_slice_header);
863 int ff_hevc_decode_nal_vps(HEVCContext *s);
864 int ff_hevc_decode_nal_sps(HEVCContext *s);
865 int ff_hevc_decode_nal_pps(HEVCContext *s);
866 int ff_hevc_decode_nal_sei(HEVCContext *s);
869 * Mark all frames in DPB as unused for reference.
871 void ff_hevc_clear_refs(HEVCContext *s);
874 * Drop all frames currently in DPB.
876 void ff_hevc_flush_dpb(HEVCContext *s);
879 * Compute POC of the current frame and return it.
881 int ff_hevc_compute_poc(HEVCContext *s, int poc_lsb);
883 RefPicList *ff_hevc_get_ref_list(HEVCContext *s, HEVCFrame *frame,
887 * Construct the reference picture sets for the current frame.
889 int ff_hevc_frame_rps(HEVCContext *s);
892 * Construct the reference picture list(s) for the current slice.
894 int ff_hevc_slice_rpl(HEVCContext *s);
896 void ff_hevc_save_states(HEVCContext *s, int ctb_addr_ts);
897 void ff_hevc_cabac_init(HEVCContext *s, int ctb_addr_ts);
898 int ff_hevc_sao_merge_flag_decode(HEVCContext *s);
899 int ff_hevc_sao_type_idx_decode(HEVCContext *s);
900 int ff_hevc_sao_band_position_decode(HEVCContext *s);
901 int ff_hevc_sao_offset_abs_decode(HEVCContext *s);
902 int ff_hevc_sao_offset_sign_decode(HEVCContext *s);
903 int ff_hevc_sao_eo_class_decode(HEVCContext *s);
904 int ff_hevc_end_of_slice_flag_decode(HEVCContext *s);
905 int ff_hevc_cu_transquant_bypass_flag_decode(HEVCContext *s);
906 int ff_hevc_skip_flag_decode(HEVCContext *s, int x0, int y0,
908 int ff_hevc_pred_mode_decode(HEVCContext *s);
909 int ff_hevc_split_coding_unit_flag_decode(HEVCContext *s, int ct_depth,
911 int ff_hevc_part_mode_decode(HEVCContext *s, int log2_cb_size);
912 int ff_hevc_pcm_flag_decode(HEVCContext *s);
913 int ff_hevc_prev_intra_luma_pred_flag_decode(HEVCContext *s);
914 int ff_hevc_mpm_idx_decode(HEVCContext *s);
915 int ff_hevc_rem_intra_luma_pred_mode_decode(HEVCContext *s);
916 int ff_hevc_intra_chroma_pred_mode_decode(HEVCContext *s);
917 int ff_hevc_merge_idx_decode(HEVCContext *s);
918 int ff_hevc_merge_flag_decode(HEVCContext *s);
919 int ff_hevc_inter_pred_idc_decode(HEVCContext *s, int nPbW, int nPbH);
920 int ff_hevc_ref_idx_lx_decode(HEVCContext *s, int num_ref_idx_lx);
921 int ff_hevc_mvp_lx_flag_decode(HEVCContext *s);
922 int ff_hevc_no_residual_syntax_flag_decode(HEVCContext *s);
923 int ff_hevc_abs_mvd_greater0_flag_decode(HEVCContext *s);
924 int ff_hevc_abs_mvd_greater1_flag_decode(HEVCContext *s);
925 int ff_hevc_mvd_decode(HEVCContext *s);
926 int ff_hevc_mvd_sign_flag_decode(HEVCContext *s);
927 int ff_hevc_split_transform_flag_decode(HEVCContext *s, int log2_trafo_size);
928 int ff_hevc_cbf_cb_cr_decode(HEVCContext *s, int trafo_depth);
929 int ff_hevc_cbf_luma_decode(HEVCContext *s, int trafo_depth);
930 int ff_hevc_transform_skip_flag_decode(HEVCContext *s, int c_idx);
931 int ff_hevc_last_significant_coeff_x_prefix_decode(HEVCContext *s, int c_idx,
933 int ff_hevc_last_significant_coeff_y_prefix_decode(HEVCContext *s, int c_idx,
935 int ff_hevc_last_significant_coeff_suffix_decode(HEVCContext *s,
936 int last_significant_coeff_prefix);
937 int ff_hevc_significant_coeff_group_flag_decode(HEVCContext *s, int c_idx,
939 int ff_hevc_significant_coeff_flag_decode(HEVCContext *s, int c_idx, int x_c,
940 int y_c, int log2_trafo_size,
941 int scan_idx, int prev_sig);
942 int ff_hevc_coeff_abs_level_greater1_flag_decode(HEVCContext *s, int c_idx,
944 int ff_hevc_coeff_abs_level_greater2_flag_decode(HEVCContext *s, int c_idx,
946 int ff_hevc_coeff_abs_level_remaining(HEVCContext *s, int base_level,
948 int ff_hevc_coeff_sign_flag(HEVCContext *s, uint8_t nb);
951 * Get the number of candidate references for the current frame.
953 int ff_hevc_frame_nb_refs(HEVCContext *s);
955 int ff_hevc_set_new_ref(HEVCContext *s, AVFrame **frame, int poc);
958 * Find next frame in output order and put a reference to it in frame.
959 * @return 1 if a frame was output, 0 otherwise
961 int ff_hevc_output_frame(HEVCContext *s, AVFrame *frame, int flush);
963 void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame *frame, int flags);
965 void ff_hevc_set_neighbour_available(HEVCContext *s, int x0, int y0,
967 void ff_hevc_luma_mv_merge_mode(HEVCContext *s, int x0, int y0,
968 int nPbW, int nPbH, int log2_cb_size,
969 int part_idx, int merge_idx, MvField *mv);
970 void ff_hevc_luma_mv_mvp_mode(HEVCContext *s, int x0, int y0,
971 int nPbW, int nPbH, int log2_cb_size,
972 int part_idx, int merge_idx,
973 MvField *mv, int mvp_lx_flag, int LX);
974 void ff_hevc_set_qPy(HEVCContext *s, int xC, int yC, int xBase, int yBase,
976 void ff_hevc_deblocking_boundary_strengths(HEVCContext *s, int x0, int y0,
978 int slice_or_tiles_up_boundary,
979 int slice_or_tiles_left_boundary);
980 int ff_hevc_cu_qp_delta_sign_flag(HEVCContext *s);
981 int ff_hevc_cu_qp_delta_abs(HEVCContext *s);
982 void ff_hevc_hls_filter(HEVCContext *s, int x, int y);
983 void ff_hevc_hls_filters(HEVCContext *s, int x_ctb, int y_ctb, int ctb_size);
985 void ff_hevc_pps_free(HEVCPPS **ppps);
987 void ff_hevc_pred_init(HEVCPredContext *hpc, int bit_depth);
989 extern const uint8_t ff_hevc_qpel_extra_before[4];
990 extern const uint8_t ff_hevc_qpel_extra_after[4];
991 extern const uint8_t ff_hevc_qpel_extra[4];
993 extern const uint8_t ff_hevc_diag_scan4x4_x[16];
994 extern const uint8_t ff_hevc_diag_scan4x4_y[16];
995 extern const uint8_t ff_hevc_diag_scan8x8_x[64];
996 extern const uint8_t ff_hevc_diag_scan8x8_y[64];
998 #endif /* AVCODEC_HEVC_H */