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)])
82 #define IS_IDR(s) (s->nal_unit_type == NAL_IDR_W_RADL || s->nal_unit_type == NAL_IDR_N_LP)
83 #define IS_BLA(s) (s->nal_unit_type == NAL_BLA_W_RADL || s->nal_unit_type == NAL_BLA_W_LP || \
84 s->nal_unit_type == NAL_BLA_N_LP)
85 #define IS_IRAP(s) (s->nal_unit_type >= 16 && s->nal_unit_type <= 23)
87 #define FFUDIV(a,b) (((a) > 0 ? (a) : (a) - (b) + 1) / (b))
88 #define FFUMOD(a,b) ((a) - (b) * FFUDIV(a,b))
91 * Table 7-3: NAL unit type codes
144 SPLIT_CODING_UNIT_FLAG,
145 CU_TRANSQUANT_BYPASS_FLAG,
151 PREV_INTRA_LUMA_PRED_FLAG,
153 REM_INTRA_LUMA_PRED_MODE,
154 INTRA_CHROMA_PRED_MODE,
160 ABS_MVD_GREATER0_FLAG,
161 ABS_MVD_GREATER1_FLAG,
165 NO_RESIDUAL_DATA_FLAG,
166 SPLIT_TRANSFORM_FLAG,
170 LAST_SIGNIFICANT_COEFF_X_PREFIX,
171 LAST_SIGNIFICANT_COEFF_Y_PREFIX,
172 LAST_SIGNIFICANT_COEFF_X_SUFFIX,
173 LAST_SIGNIFICANT_COEFF_Y_SUFFIX,
174 SIGNIFICANT_COEFF_GROUP_FLAG,
175 SIGNIFICANT_COEFF_FLAG,
176 COEFF_ABS_LEVEL_GREATER1_FLAG,
177 COEFF_ABS_LEVEL_GREATER2_FLAG,
178 COEFF_ABS_LEVEL_REMAINING,
262 typedef struct ShortTermRPS {
263 unsigned int num_negative_pics;
265 int32_t delta_poc[32];
269 typedef struct LongTermRPS {
275 typedef struct RefPicList {
276 struct HEVCFrame *ref[MAX_REFS];
278 int isLongTerm[MAX_REFS];
282 typedef struct RefPicListTab {
283 RefPicList refPicList[2];
286 typedef struct HEVCWindow {
287 unsigned int left_offset;
288 unsigned int right_offset;
289 unsigned int top_offset;
290 unsigned int bottom_offset;
296 int overscan_info_present_flag;
297 int overscan_appropriate_flag;
299 int video_signal_type_present_flag;
301 int video_full_range_flag;
302 int colour_description_present_flag;
303 uint8_t colour_primaries;
304 uint8_t transfer_characteristic;
305 uint8_t matrix_coeffs;
307 int chroma_loc_info_present_flag;
308 int chroma_sample_loc_type_top_field;
309 int chroma_sample_loc_type_bottom_field;
310 int neutra_chroma_indication_flag;
313 int frame_field_info_present_flag;
315 int default_display_window_flag;
316 HEVCWindow def_disp_win;
318 int vui_timing_info_present_flag;
319 uint32_t vui_num_units_in_tick;
320 uint32_t vui_time_scale;
321 int vui_poc_proportional_to_timing_flag;
322 int vui_num_ticks_poc_diff_one_minus1;
323 int vui_hrd_parameters_present_flag;
325 int bitstream_restriction_flag;
326 int tiles_fixed_structure_flag;
327 int motion_vectors_over_pic_boundaries_flag;
328 int restricted_ref_pic_lists_flag;
329 int min_spatial_segmentation_idc;
330 int max_bytes_per_pic_denom;
331 int max_bits_per_min_cu_denom;
332 int log2_max_mv_length_horizontal;
333 int log2_max_mv_length_vertical;
336 typedef struct PTLCommon {
337 uint8_t profile_space;
340 uint8_t profile_compatibility_flag[32];
342 uint8_t progressive_source_flag;
343 uint8_t interlaced_source_flag;
344 uint8_t non_packed_constraint_flag;
345 uint8_t frame_only_constraint_flag;
349 PTLCommon general_ptl;
350 PTLCommon sub_layer_ptl[MAX_SUB_LAYERS];
352 uint8_t sub_layer_profile_present_flag[MAX_SUB_LAYERS];
353 uint8_t sub_layer_level_present_flag[MAX_SUB_LAYERS];
356 typedef struct HEVCVPS {
357 uint8_t vps_temporal_id_nesting_flag;
359 int vps_max_sub_layers; ///< vps_max_temporal_layers_minus1 + 1
362 int vps_sub_layer_ordering_info_present_flag;
363 unsigned int vps_max_dec_pic_buffering[MAX_SUB_LAYERS];
364 unsigned int vps_num_reorder_pics[MAX_SUB_LAYERS];
365 unsigned int vps_max_latency_increase[MAX_SUB_LAYERS];
366 int vps_max_layer_id;
367 int vps_num_layer_sets; ///< vps_num_layer_sets_minus1 + 1
368 uint8_t vps_timing_info_present_flag;
369 uint32_t vps_num_units_in_tick;
370 uint32_t vps_time_scale;
371 uint8_t vps_poc_proportional_to_timing_flag;
372 int vps_num_ticks_poc_diff_one; ///< vps_num_ticks_poc_diff_one_minus1 + 1
373 int vps_num_hrd_parameters;
376 typedef struct ScalingList {
377 /* This is a little wasteful, since sizeID 0 only needs 8 coeffs,
378 * and size ID 3 only has 2 arrays, not 6. */
379 uint8_t sl[4][6][64];
383 typedef struct HEVCSPS {
385 int chroma_format_idc;
386 uint8_t separate_colour_plane_flag;
388 ///< output (i.e. cropped) values
389 int output_width, output_height;
390 HEVCWindow output_window;
392 HEVCWindow pic_conf_win;
396 enum AVPixelFormat pix_fmt;
398 unsigned int log2_max_poc_lsb;
399 int pcm_enabled_flag;
403 int max_dec_pic_buffering;
404 int num_reorder_pics;
405 int max_latency_increase;
406 } temporal_layer[MAX_SUB_LAYERS];
411 uint8_t scaling_list_enable_flag;
412 ScalingList scaling_list;
414 unsigned int nb_st_rps;
415 ShortTermRPS st_rps[MAX_SHORT_TERM_RPS_COUNT];
417 uint8_t amp_enabled_flag;
420 uint8_t long_term_ref_pics_present_flag;
421 uint16_t lt_ref_pic_poc_lsb_sps[32];
422 uint8_t used_by_curr_pic_lt_sps_flag[32];
423 uint8_t num_long_term_ref_pics_sps;
427 uint8_t bit_depth_chroma;
428 unsigned int log2_min_pcm_cb_size;
429 unsigned int log2_max_pcm_cb_size;
430 uint8_t loop_filter_disable_flag;
432 uint8_t sps_temporal_mvp_enabled_flag;
433 uint8_t sps_strong_intra_smoothing_enable_flag;
435 unsigned int log2_min_cb_size;
436 unsigned int log2_diff_max_min_coding_block_size;
437 unsigned int log2_min_tb_size;
438 unsigned int log2_max_trafo_size;
439 unsigned int log2_ctb_size;
440 unsigned int log2_min_pu_size;
442 int max_transform_hierarchy_depth_inter;
443 int max_transform_hierarchy_depth_intra;
445 ///< coded frame dimension in various units
464 typedef struct HEVCPPS {
465 unsigned int sps_id; ///< seq_parameter_set_id
467 uint8_t sign_data_hiding_flag;
469 uint8_t cabac_init_present_flag;
471 int num_ref_idx_l0_default_active; ///< num_ref_idx_l0_default_active_minus1 + 1
472 int num_ref_idx_l1_default_active; ///< num_ref_idx_l1_default_active_minus1 + 1
473 int pic_init_qp_minus26;
475 uint8_t constrained_intra_pred_flag;
476 uint8_t transform_skip_enabled_flag;
478 uint8_t cu_qp_delta_enabled_flag;
479 int diff_cu_qp_delta_depth;
483 uint8_t pic_slice_level_chroma_qp_offsets_present_flag;
484 uint8_t weighted_pred_flag;
485 uint8_t weighted_bipred_flag;
486 uint8_t output_flag_present_flag;
487 uint8_t transquant_bypass_enable_flag;
489 uint8_t dependent_slice_segments_enabled_flag;
490 uint8_t tiles_enabled_flag;
491 uint8_t entropy_coding_sync_enabled_flag;
493 int num_tile_columns; ///< num_tile_columns_minus1 + 1
494 int num_tile_rows; ///< num_tile_rows_minus1 + 1
495 uint8_t uniform_spacing_flag;
496 uint8_t loop_filter_across_tiles_enabled_flag;
498 uint8_t seq_loop_filter_across_slices_enabled_flag;
500 uint8_t deblocking_filter_control_present_flag;
501 uint8_t deblocking_filter_override_enabled_flag;
503 int beta_offset; ///< beta_offset_div2 * 2
504 int tc_offset; ///< tc_offset_div2 * 2
506 uint8_t scaling_list_data_present_flag;
507 ScalingList scaling_list;
509 uint8_t lists_modification_present_flag;
510 int log2_parallel_merge_level; ///< log2_parallel_merge_level_minus2 + 2
511 int num_extra_slice_header_bits;
512 uint8_t slice_header_extension_present_flag;
514 // Inferred parameters
515 unsigned int *column_width; ///< ColumnWidth
516 unsigned int *row_height; ///< RowHeight
517 unsigned int *col_bd; ///< ColBd
518 unsigned int *row_bd; ///< RowBd
521 int *ctb_addr_rs_to_ts; ///< CtbAddrRSToTS
522 int *ctb_addr_ts_to_rs; ///< CtbAddrTSToRS
523 int *tile_id; ///< TileId
524 int *tile_pos_rs; ///< TilePosRS
525 int *min_tb_addr_zs; ///< MinTbAddrZS
528 typedef struct HEVCParamSets {
529 AVBufferRef *vps_list[MAX_VPS_COUNT];
530 AVBufferRef *sps_list[MAX_SPS_COUNT];
531 AVBufferRef *pps_list[MAX_PPS_COUNT];
533 /* currently active parameter sets */
539 typedef struct SliceHeader {
542 ///< address (in raster order) of the first block in the current slice segment
543 unsigned int slice_segment_addr;
544 ///< address (in raster order) of the first block in the current slice
545 unsigned int slice_addr;
547 enum SliceType slice_type;
549 int pic_order_cnt_lsb;
551 uint8_t first_slice_in_pic_flag;
552 uint8_t dependent_slice_segment_flag;
553 uint8_t pic_output_flag;
554 uint8_t colour_plane_id;
556 ///< RPS coded in the slice header itself is stored here
557 int short_term_ref_pic_set_sps_flag;
558 int short_term_ref_pic_set_size;
559 ShortTermRPS slice_rps;
560 const ShortTermRPS *short_term_rps;
561 LongTermRPS long_term_rps;
562 unsigned int list_entry_lx[2][32];
564 uint8_t rpl_modification_flag[2];
565 uint8_t no_output_of_prior_pics_flag;
566 uint8_t slice_temporal_mvp_enabled_flag;
568 unsigned int nb_refs[2];
570 uint8_t slice_sample_adaptive_offset_flag[3];
571 uint8_t mvd_l1_zero_flag;
573 uint8_t cabac_init_flag;
574 uint8_t disable_deblocking_filter_flag; ///< slice_header_disable_deblocking_filter_flag
575 uint8_t slice_loop_filter_across_slices_enabled_flag;
576 uint8_t collocated_list;
578 unsigned int collocated_ref_idx;
581 int slice_cb_qp_offset;
582 int slice_cr_qp_offset;
584 int beta_offset; ///< beta_offset_div2 * 2
585 int tc_offset; ///< tc_offset_div2 * 2
587 unsigned int max_num_merge_cand; ///< 5 - 5_minus_max_num_merge_cand
589 int num_entry_point_offsets;
593 uint8_t luma_log2_weight_denom;
594 int16_t chroma_log2_weight_denom;
596 int16_t luma_weight_l0[16];
597 int16_t chroma_weight_l0[16][2];
598 int16_t chroma_weight_l1[16][2];
599 int16_t luma_weight_l1[16];
601 int16_t luma_offset_l0[16];
602 int16_t chroma_offset_l0[16][2];
604 int16_t luma_offset_l1[16];
605 int16_t chroma_offset_l1[16][2];
607 int slice_ctb_addr_rs;
610 typedef struct CodingTree {
611 int depth; ///< ctDepth
614 typedef struct CodingUnit {
618 enum PredMode pred_mode; ///< PredMode
619 enum PartMode part_mode; ///< PartMode
621 // Inferred parameters
622 uint8_t intra_split_flag; ///< IntraSplitFlag
623 uint8_t max_trafo_depth; ///< MaxTrafoDepth
624 uint8_t cu_transquant_bypass_flag;
628 int16_t x; ///< horizontal component of motion vector
629 int16_t y; ///< vertical component of motion vector
632 typedef struct MvField {
633 DECLARE_ALIGNED(4, Mv, mv)[2];
639 typedef struct NeighbourAvailable {
640 int cand_bottom_left;
645 int cand_up_right_sap;
646 } NeighbourAvailable;
648 typedef struct PredictionUnit {
650 int rem_intra_luma_pred_mode;
651 uint8_t intra_pred_mode[4];
654 uint8_t intra_pred_mode_c;
657 typedef struct TransformUnit {
660 // Inferred parameters;
661 int cur_intra_pred_mode;
662 uint8_t is_cu_qp_delta_coded;
665 typedef struct DBParams {
670 #define HEVC_FRAME_FLAG_OUTPUT (1 << 0)
671 #define HEVC_FRAME_FLAG_SHORT_REF (1 << 1)
672 #define HEVC_FRAME_FLAG_LONG_REF (1 << 2)
674 typedef struct HEVCFrame {
678 RefPicList *refPicList;
679 RefPicListTab **rpl_tab;
682 struct HEVCFrame *collocated_ref;
686 AVBufferRef *tab_mvf_buf;
687 AVBufferRef *rpl_tab_buf;
688 AVBufferRef *rpl_buf;
690 AVBufferRef *hwaccel_priv_buf;
691 void *hwaccel_picture_private;
694 * A sequence counter, so that old frames are output first
700 * A combination of HEVC_FRAME_FLAG_*
705 typedef struct HEVCNAL {
706 uint8_t *rbsp_buffer;
707 int rbsp_buffer_size;
713 const uint8_t *raw_data;
718 typedef struct HEVCPredContext {
719 void (*intra_pred[4])(struct HEVCContext *s, int x0, int y0, int c_idx);
721 void (*pred_planar[4])(uint8_t *src, const uint8_t *top,
722 const uint8_t *left, ptrdiff_t stride);
723 void (*pred_dc)(uint8_t *src, const uint8_t *top, const uint8_t *left,
724 ptrdiff_t stride, int log2_size, int c_idx);
725 void (*pred_angular[4])(uint8_t *src, const uint8_t *top,
726 const uint8_t *left, ptrdiff_t stride,
727 int c_idx, int mode);
730 typedef struct HEVCLocalContext {
731 DECLARE_ALIGNED(16, int16_t, mc_buffer[(MAX_PB_SIZE + 7) * MAX_PB_SIZE]);
732 uint8_t cabac_state[HEVC_CONTEXTS];
734 uint8_t first_qp_group;
744 uint8_t ctb_left_flag;
746 uint8_t ctb_up_right_flag;
747 uint8_t ctb_up_left_flag;
748 int start_of_tiles_x;
751 /* +7 is for subpixel interpolation, *2 for high bit depths */
752 DECLARE_ALIGNED(32, uint8_t, edge_emu_buffer)[(MAX_PB_SIZE + 7) * EDGE_EMU_BUFFER_STRIDE * 2];
756 NeighbourAvailable na;
758 #define BOUNDARY_LEFT_SLICE (1 << 0)
759 #define BOUNDARY_LEFT_TILE (1 << 1)
760 #define BOUNDARY_UPPER_SLICE (1 << 2)
761 #define BOUNDARY_UPPER_TILE (1 << 3)
762 /* properties of the boundary of the current CTB for the purposes
763 * of the deblocking filter */
767 typedef struct HEVCContext {
768 const AVClass *c; // needed by private avoptions
769 AVCodecContext *avctx;
771 HEVCLocalContext HEVClc;
773 uint8_t cabac_state[HEVC_CONTEXTS];
775 /** 1 if the independent slice segment header was successfully parsed */
776 uint8_t slice_initialized;
781 AVFrame *output_frame;
785 AVBufferPool *tab_mvf_pool;
786 AVBufferPool *rpl_tab_pool;
788 ///< candidate references for the current frame
794 enum NALUnitType nal_unit_type;
795 int temporal_id; ///< temporal_id_plus1 - 1
800 int slice_idx; ///< number of the slice being currently decoded
801 int eos; ///< current packet contains an EOS/EOB NAL
809 HEVCDSPContext hevcdsp;
810 VideoDSPContext vdsp;
811 BswapDSPContext bdsp;
813 uint8_t *horizontal_bs;
814 uint8_t *vertical_bs;
816 int32_t *tab_slice_address;
820 uint8_t *tab_ct_depth;
824 uint8_t *cbf_luma; // cbf_luma of colocated TU
827 // CTB-level flags affecting loop filter operation
828 uint8_t *filter_slice_edges;
830 /** used on BE to byteswap the lines for checksumming */
831 uint8_t *checksum_buf;
832 int checksum_buf_size;
835 * Sequence counters for decoded and output frames, so that old
836 * frames are output first after a POC reset
844 // type of the first VCL NAL of the current frame
845 enum NALUnitType first_nal_type;
847 // for checking the frame checksums
848 struct AVMD5 *md5_ctx;
852 uint8_t context_initialized;
853 uint8_t is_nalff; ///< this flag is != 0 if bitstream is encapsulated
854 ///< as a format defined in 14496-15
855 int apply_defdispwin;
857 int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4)
860 /** frame packing arrangement variables */
861 int sei_frame_packing_present;
862 int frame_packing_arrangement_type;
863 int content_interpretation_type;
864 int quincunx_subsampling;
866 /** display orientation */
867 int sei_display_orientation_present;
868 int sei_anticlockwise_rotation;
869 int sei_hflip, sei_vflip;
872 int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx,
873 ShortTermRPS *rps, const HEVCSPS *sps, int is_slice_header);
876 * Parse the SPS from the bitstream into the provided HEVCSPS struct.
878 * @param sps_id the SPS id will be written here
879 * @param apply_defdispwin if set 1, the default display window from the VUI
880 * will be applied to the video dimensions
881 * @param vps_list if non-NULL, this function will validate that the SPS refers
884 int ff_hevc_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id,
885 int apply_defdispwin, AVBufferRef **vps_list, AVCodecContext *avctx);
887 int ff_hevc_decode_nal_vps(GetBitContext *gb, AVCodecContext *avctx,
889 int ff_hevc_decode_nal_sps(GetBitContext *gb, AVCodecContext *avctx,
890 HEVCParamSets *ps, int apply_defdispwin);
891 int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,
893 int ff_hevc_decode_nal_sei(HEVCContext *s);
896 * Mark all frames in DPB as unused for reference.
898 void ff_hevc_clear_refs(HEVCContext *s);
901 * Drop all frames currently in DPB.
903 void ff_hevc_flush_dpb(HEVCContext *s);
906 * Compute POC of the current frame and return it.
908 int ff_hevc_compute_poc(HEVCContext *s, int poc_lsb);
910 RefPicList *ff_hevc_get_ref_list(HEVCContext *s, HEVCFrame *frame,
914 * Construct the reference picture sets for the current frame.
916 int ff_hevc_frame_rps(HEVCContext *s);
919 * Construct the reference picture list(s) for the current slice.
921 int ff_hevc_slice_rpl(HEVCContext *s);
923 void ff_hevc_save_states(HEVCContext *s, int ctb_addr_ts);
924 void ff_hevc_cabac_init(HEVCContext *s, int ctb_addr_ts);
925 int ff_hevc_sao_merge_flag_decode(HEVCContext *s);
926 int ff_hevc_sao_type_idx_decode(HEVCContext *s);
927 int ff_hevc_sao_band_position_decode(HEVCContext *s);
928 int ff_hevc_sao_offset_abs_decode(HEVCContext *s);
929 int ff_hevc_sao_offset_sign_decode(HEVCContext *s);
930 int ff_hevc_sao_eo_class_decode(HEVCContext *s);
931 int ff_hevc_end_of_slice_flag_decode(HEVCContext *s);
932 int ff_hevc_cu_transquant_bypass_flag_decode(HEVCContext *s);
933 int ff_hevc_skip_flag_decode(HEVCContext *s, int x0, int y0,
935 int ff_hevc_pred_mode_decode(HEVCContext *s);
936 int ff_hevc_split_coding_unit_flag_decode(HEVCContext *s, int ct_depth,
938 int ff_hevc_part_mode_decode(HEVCContext *s, int log2_cb_size);
939 int ff_hevc_pcm_flag_decode(HEVCContext *s);
940 int ff_hevc_prev_intra_luma_pred_flag_decode(HEVCContext *s);
941 int ff_hevc_mpm_idx_decode(HEVCContext *s);
942 int ff_hevc_rem_intra_luma_pred_mode_decode(HEVCContext *s);
943 int ff_hevc_intra_chroma_pred_mode_decode(HEVCContext *s);
944 int ff_hevc_merge_idx_decode(HEVCContext *s);
945 int ff_hevc_merge_flag_decode(HEVCContext *s);
946 int ff_hevc_inter_pred_idc_decode(HEVCContext *s, int nPbW, int nPbH);
947 int ff_hevc_ref_idx_lx_decode(HEVCContext *s, int num_ref_idx_lx);
948 int ff_hevc_mvp_lx_flag_decode(HEVCContext *s);
949 int ff_hevc_no_residual_syntax_flag_decode(HEVCContext *s);
950 int ff_hevc_abs_mvd_greater0_flag_decode(HEVCContext *s);
951 int ff_hevc_abs_mvd_greater1_flag_decode(HEVCContext *s);
952 int ff_hevc_mvd_decode(HEVCContext *s);
953 int ff_hevc_mvd_sign_flag_decode(HEVCContext *s);
954 int ff_hevc_split_transform_flag_decode(HEVCContext *s, int log2_trafo_size);
955 int ff_hevc_cbf_cb_cr_decode(HEVCContext *s, int trafo_depth);
956 int ff_hevc_cbf_luma_decode(HEVCContext *s, int trafo_depth);
957 int ff_hevc_transform_skip_flag_decode(HEVCContext *s, int c_idx);
958 int ff_hevc_last_significant_coeff_x_prefix_decode(HEVCContext *s, int c_idx,
960 int ff_hevc_last_significant_coeff_y_prefix_decode(HEVCContext *s, int c_idx,
962 int ff_hevc_last_significant_coeff_suffix_decode(HEVCContext *s,
963 int last_significant_coeff_prefix);
964 int ff_hevc_significant_coeff_group_flag_decode(HEVCContext *s, int c_idx,
966 int ff_hevc_significant_coeff_flag_decode(HEVCContext *s, int c_idx, int x_c,
967 int y_c, int log2_trafo_size,
968 int scan_idx, int prev_sig);
969 int ff_hevc_coeff_abs_level_greater1_flag_decode(HEVCContext *s, int c_idx,
971 int ff_hevc_coeff_abs_level_greater2_flag_decode(HEVCContext *s, int c_idx,
973 int ff_hevc_coeff_abs_level_remaining(HEVCContext *s, int base_level,
975 int ff_hevc_coeff_sign_flag(HEVCContext *s, uint8_t nb);
978 * Get the number of candidate references for the current frame.
980 int ff_hevc_frame_nb_refs(HEVCContext *s);
982 int ff_hevc_set_new_ref(HEVCContext *s, AVFrame **frame, int poc);
985 * Find next frame in output order and put a reference to it in frame.
986 * @return 1 if a frame was output, 0 otherwise
988 int ff_hevc_output_frame(HEVCContext *s, AVFrame *frame, int flush);
990 void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame *frame, int flags);
992 void ff_hevc_set_neighbour_available(HEVCContext *s, int x0, int y0,
994 void ff_hevc_luma_mv_merge_mode(HEVCContext *s, int x0, int y0,
995 int nPbW, int nPbH, int log2_cb_size,
996 int part_idx, int merge_idx, MvField *mv);
997 void ff_hevc_luma_mv_mvp_mode(HEVCContext *s, int x0, int y0,
998 int nPbW, int nPbH, int log2_cb_size,
999 int part_idx, int merge_idx,
1000 MvField *mv, int mvp_lx_flag, int LX);
1001 void ff_hevc_set_qPy(HEVCContext *s, int xC, int yC, int xBase, int yBase,
1003 void ff_hevc_deblocking_boundary_strengths(HEVCContext *s, int x0, int y0,
1004 int log2_trafo_size);
1005 int ff_hevc_cu_qp_delta_sign_flag(HEVCContext *s);
1006 int ff_hevc_cu_qp_delta_abs(HEVCContext *s);
1007 void ff_hevc_hls_filter(HEVCContext *s, int x, int y);
1008 void ff_hevc_hls_filters(HEVCContext *s, int x_ctb, int y_ctb, int ctb_size);
1010 void ff_hevc_pps_free(HEVCPPS **ppps);
1012 void ff_hevc_pred_init(HEVCPredContext *hpc, int bit_depth);
1015 * Extract the raw (unescaped) HEVC bitstream.
1017 int ff_hevc_extract_rbsp(const uint8_t *src, int length,
1020 int ff_hevc_encode_nal_vps(HEVCVPS *vps, unsigned int id,
1021 uint8_t *buf, int buf_size);
1023 extern const uint8_t ff_hevc_qpel_extra_before[4];
1024 extern const uint8_t ff_hevc_qpel_extra_after[4];
1025 extern const uint8_t ff_hevc_qpel_extra[4];
1027 extern const uint8_t ff_hevc_diag_scan4x4_x[16];
1028 extern const uint8_t ff_hevc_diag_scan4x4_y[16];
1029 extern const uint8_t ff_hevc_diag_scan8x8_x[64];
1030 extern const uint8_t ff_hevc_diag_scan8x8_y[64];
1032 #endif /* AVCODEC_HEVC_H */