Mercurial > hg > forks > libbpg
diff libavcodec/hevc.h @ 0:772086c29cc7
Initial import.
| author | Matti Hamalainen <ccr@tnsp.org> |
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| date | Wed, 16 Nov 2016 11:16:33 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libavcodec/hevc.h Wed Nov 16 11:16:33 2016 +0200 @@ -0,0 +1,1082 @@ +/* + * HEVC video decoder + * + * Copyright (C) 2012 - 2013 Guillaume Martres + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef AVCODEC_HEVC_H +#define AVCODEC_HEVC_H + +#include "libavutil/buffer.h" +#include "libavutil/md5.h" + +#include "avcodec.h" +#include "bswapdsp.h" +#include "cabac.h" +#include "get_bits.h" +#include "hevcdsp.h" +#include "hevcpred.h" +#include "internal.h" +#include "thread.h" +#include "videodsp.h" + +#define MAX_DPB_SIZE 16 // A.4.1 +#define MAX_REFS 16 + +#define MAX_NB_THREADS 16 +#define SHIFT_CTB_WPP 2 + +/** + * 7.4.2.1 + */ +#define MAX_SUB_LAYERS 7 +#ifdef USE_MSPS +#define MAX_VPS_COUNT 16 +#define MAX_SPS_COUNT 32 +#ifdef USE_PRED +#define MAX_DPB_COUNT 32 +#else +#define MAX_DPB_COUNT 1 +#endif +#else +#define MAX_VPS_COUNT 1 +#define MAX_SPS_COUNT 1 +#define MAX_DPB_COUNT 32 +#endif +#define MAX_PPS_COUNT 256 +#define MAX_SHORT_TERM_RPS_COUNT 64 +#define MAX_CU_SIZE 128 + +//TODO: check if this is really the maximum +#define MAX_TRANSFORM_DEPTH 5 + +#define MAX_TB_SIZE 32 +#define MAX_LOG2_CTB_SIZE 6 +#define MAX_QP 51 +#define DEFAULT_INTRA_TC_OFFSET 2 + +#define HEVC_CONTEXTS 199 + +#define MRG_MAX_NUM_CANDS 5 + +#define L0 0 +#define L1 1 + +#define EPEL_EXTRA_BEFORE 1 +#define EPEL_EXTRA_AFTER 2 +#define EPEL_EXTRA 3 +#define QPEL_EXTRA_BEFORE 3 +#define QPEL_EXTRA_AFTER 4 +#define QPEL_EXTRA 7 + +#define EDGE_EMU_BUFFER_STRIDE 80 + +/** + * Value of the luma sample at position (x, y) in the 2D array tab. + */ +#define SAMPLE(tab, x, y) ((tab)[(y) * s->sps->width + (x)]) +#define SAMPLE_CTB(tab, x, y) ((tab)[(y) * min_cb_width + (x)]) + +#define IS_IDR(s) ((s)->nal_unit_type == NAL_IDR_W_RADL || (s)->nal_unit_type == NAL_IDR_N_LP) +#define IS_BLA(s) ((s)->nal_unit_type == NAL_BLA_W_RADL || (s)->nal_unit_type == NAL_BLA_W_LP || \ + (s)->nal_unit_type == NAL_BLA_N_LP) +#define IS_IRAP(s) ((s)->nal_unit_type >= 16 && (s)->nal_unit_type <= 23) + +/** + * Table 7-3: NAL unit type codes + */ +enum NALUnitType { + NAL_TRAIL_N = 0, + NAL_TRAIL_R = 1, + NAL_TSA_N = 2, + NAL_TSA_R = 3, + NAL_STSA_N = 4, + NAL_STSA_R = 5, + NAL_RADL_N = 6, + NAL_RADL_R = 7, + NAL_RASL_N = 8, + NAL_RASL_R = 9, + NAL_BLA_W_LP = 16, + NAL_BLA_W_RADL = 17, + NAL_BLA_N_LP = 18, + NAL_IDR_W_RADL = 19, + NAL_IDR_N_LP = 20, + NAL_CRA_NUT = 21, + NAL_VPS = 32, + NAL_SPS = 33, + NAL_PPS = 34, + NAL_AUD = 35, + NAL_EOS_NUT = 36, + NAL_EOB_NUT = 37, + NAL_FD_NUT = 38, + NAL_SEI_PREFIX = 39, + NAL_SEI_SUFFIX = 40, +}; + +enum RPSType { + ST_CURR_BEF = 0, + ST_CURR_AFT, + ST_FOLL, + LT_CURR, + LT_FOLL, + NB_RPS_TYPE, +}; + +enum SliceType { + B_SLICE = 0, + P_SLICE = 1, + I_SLICE = 2, +}; + +enum SyntaxElement { + SAO_MERGE_FLAG = 0, + SAO_TYPE_IDX, + SAO_EO_CLASS, + SAO_BAND_POSITION, + SAO_OFFSET_ABS, + SAO_OFFSET_SIGN, + END_OF_SLICE_FLAG, + SPLIT_CODING_UNIT_FLAG, + CU_TRANSQUANT_BYPASS_FLAG, + SKIP_FLAG, + CU_QP_DELTA, + PRED_MODE_FLAG, + PART_MODE, + PCM_FLAG, + PREV_INTRA_LUMA_PRED_FLAG, + MPM_IDX, + REM_INTRA_LUMA_PRED_MODE, + INTRA_CHROMA_PRED_MODE, + MERGE_FLAG, + MERGE_IDX, + INTER_PRED_IDC, + REF_IDX_L0, + REF_IDX_L1, + ABS_MVD_GREATER0_FLAG, + ABS_MVD_GREATER1_FLAG, + ABS_MVD_MINUS2, + MVD_SIGN_FLAG, + MVP_LX_FLAG, + NO_RESIDUAL_DATA_FLAG, + SPLIT_TRANSFORM_FLAG, + CBF_LUMA, + CBF_CB_CR, + TRANSFORM_SKIP_FLAG, + EXPLICIT_RDPCM_FLAG, + EXPLICIT_RDPCM_DIR_FLAG, + LAST_SIGNIFICANT_COEFF_X_PREFIX, + LAST_SIGNIFICANT_COEFF_Y_PREFIX, + LAST_SIGNIFICANT_COEFF_X_SUFFIX, + LAST_SIGNIFICANT_COEFF_Y_SUFFIX, + SIGNIFICANT_COEFF_GROUP_FLAG, + SIGNIFICANT_COEFF_FLAG, + COEFF_ABS_LEVEL_GREATER1_FLAG, + COEFF_ABS_LEVEL_GREATER2_FLAG, + COEFF_ABS_LEVEL_REMAINING, + COEFF_SIGN_FLAG, + LOG2_RES_SCALE_ABS, + RES_SCALE_SIGN_FLAG, + CU_CHROMA_QP_OFFSET_FLAG, + CU_CHROMA_QP_OFFSET_IDX, +}; + +enum PartMode { + PART_2Nx2N = 0, + PART_2NxN = 1, + PART_Nx2N = 2, + PART_NxN = 3, + PART_2NxnU = 4, + PART_2NxnD = 5, + PART_nLx2N = 6, + PART_nRx2N = 7, +}; + +enum PredMode { + MODE_INTER = 0, + MODE_INTRA, + MODE_SKIP, +}; + +enum InterPredIdc { + PRED_L0 = 0, + PRED_L1, + PRED_BI, +}; + +enum PredFlag { + PF_INTRA = 0, + PF_L0, + PF_L1, + PF_BI, +}; + +enum IntraPredMode { + INTRA_PLANAR = 0, + INTRA_DC, + INTRA_ANGULAR_2, + INTRA_ANGULAR_3, + INTRA_ANGULAR_4, + INTRA_ANGULAR_5, + INTRA_ANGULAR_6, + INTRA_ANGULAR_7, + INTRA_ANGULAR_8, + INTRA_ANGULAR_9, + INTRA_ANGULAR_10, + INTRA_ANGULAR_11, + INTRA_ANGULAR_12, + INTRA_ANGULAR_13, + INTRA_ANGULAR_14, + INTRA_ANGULAR_15, + INTRA_ANGULAR_16, + INTRA_ANGULAR_17, + INTRA_ANGULAR_18, + INTRA_ANGULAR_19, + INTRA_ANGULAR_20, + INTRA_ANGULAR_21, + INTRA_ANGULAR_22, + INTRA_ANGULAR_23, + INTRA_ANGULAR_24, + INTRA_ANGULAR_25, + INTRA_ANGULAR_26, + INTRA_ANGULAR_27, + INTRA_ANGULAR_28, + INTRA_ANGULAR_29, + INTRA_ANGULAR_30, + INTRA_ANGULAR_31, + INTRA_ANGULAR_32, + INTRA_ANGULAR_33, + INTRA_ANGULAR_34, +}; + +enum SAOType { + SAO_NOT_APPLIED = 0, + SAO_BAND, + SAO_EDGE, + SAO_APPLIED +}; + +enum SAOEOClass { + SAO_EO_HORIZ = 0, + SAO_EO_VERT, + SAO_EO_135D, + SAO_EO_45D, +}; + +enum ScanType { + SCAN_DIAG = 0, + SCAN_HORIZ, + SCAN_VERT, +}; + +typedef struct ShortTermRPS { + unsigned int num_negative_pics; + int num_delta_pocs; + int32_t delta_poc[32]; + uint8_t used[32]; +} ShortTermRPS; + +typedef struct LongTermRPS { + int poc[32]; + uint8_t used[32]; + uint8_t nb_refs; +} LongTermRPS; + +typedef struct RefPicList { + struct HEVCFrame *ref[MAX_REFS]; + int list[MAX_REFS]; + int isLongTerm[MAX_REFS]; + int nb_refs; +} RefPicList; + +typedef struct RefPicListTab { + RefPicList refPicList[2]; +} RefPicListTab; + +typedef struct HEVCWindow { + int left_offset; + int right_offset; + int top_offset; + int bottom_offset; +} HEVCWindow; + +typedef struct VUI { + AVRational sar; + + int overscan_info_present_flag; + int overscan_appropriate_flag; + + int video_signal_type_present_flag; + int video_format; + int video_full_range_flag; + int colour_description_present_flag; + uint8_t colour_primaries; + uint8_t transfer_characteristic; + uint8_t matrix_coeffs; + + int chroma_loc_info_present_flag; + int chroma_sample_loc_type_top_field; + int chroma_sample_loc_type_bottom_field; + int neutra_chroma_indication_flag; + + int field_seq_flag; + int frame_field_info_present_flag; + + int default_display_window_flag; + HEVCWindow def_disp_win; + + int vui_timing_info_present_flag; + uint32_t vui_num_units_in_tick; + uint32_t vui_time_scale; + int vui_poc_proportional_to_timing_flag; + int vui_num_ticks_poc_diff_one_minus1; + int vui_hrd_parameters_present_flag; + + int bitstream_restriction_flag; + int tiles_fixed_structure_flag; + int motion_vectors_over_pic_boundaries_flag; + int restricted_ref_pic_lists_flag; + int min_spatial_segmentation_idc; + int max_bytes_per_pic_denom; + int max_bits_per_min_cu_denom; + int log2_max_mv_length_horizontal; + int log2_max_mv_length_vertical; +} VUI; + +typedef struct PTLCommon { + uint8_t profile_space; + uint8_t tier_flag; + uint8_t profile_idc; + uint8_t profile_compatibility_flag[32]; + uint8_t level_idc; + uint8_t progressive_source_flag; + uint8_t interlaced_source_flag; + uint8_t non_packed_constraint_flag; + uint8_t frame_only_constraint_flag; +} PTLCommon; + +typedef struct PTL { + PTLCommon general_ptl; + PTLCommon sub_layer_ptl[MAX_SUB_LAYERS]; + + uint8_t sub_layer_profile_present_flag[MAX_SUB_LAYERS]; + uint8_t sub_layer_level_present_flag[MAX_SUB_LAYERS]; +} PTL; + +typedef struct HEVCVPS { + uint8_t vps_temporal_id_nesting_flag; + int vps_max_layers; + int vps_max_sub_layers; ///< vps_max_temporal_layers_minus1 + 1 + + PTL ptl; + int vps_sub_layer_ordering_info_present_flag; + unsigned int vps_max_dec_pic_buffering[MAX_SUB_LAYERS]; + unsigned int vps_num_reorder_pics[MAX_SUB_LAYERS]; + unsigned int vps_max_latency_increase[MAX_SUB_LAYERS]; + int vps_max_layer_id; + int vps_num_layer_sets; ///< vps_num_layer_sets_minus1 + 1 + uint8_t vps_timing_info_present_flag; + uint32_t vps_num_units_in_tick; + uint32_t vps_time_scale; + uint8_t vps_poc_proportional_to_timing_flag; + int vps_num_ticks_poc_diff_one; ///< vps_num_ticks_poc_diff_one_minus1 + 1 + int vps_num_hrd_parameters; +} HEVCVPS; + +typedef struct ScalingList { + /* This is a little wasteful, since sizeID 0 only needs 8 coeffs, + * and size ID 3 only has 2 arrays, not 6. */ + uint8_t sl[4][6][64]; + uint8_t sl_dc[2][6]; +} ScalingList; + +typedef struct HEVCSPS { + unsigned vps_id; + int chroma_format_idc; + uint8_t separate_colour_plane_flag; + + ///< output (i.e. cropped) values + int output_width, output_height; + HEVCWindow output_window; + + HEVCWindow pic_conf_win; + + int bit_depth; + int pixel_shift; + enum AVPixelFormat pix_fmt; + + unsigned int log2_max_poc_lsb; + int pcm_enabled_flag; + + int max_sub_layers; + struct { + int max_dec_pic_buffering; + int num_reorder_pics; + int max_latency_increase; + } temporal_layer[MAX_SUB_LAYERS]; + + VUI vui; + PTL ptl; + + uint8_t scaling_list_enable_flag; + ScalingList scaling_list; + + unsigned int nb_st_rps; + ShortTermRPS st_rps[MAX_SHORT_TERM_RPS_COUNT]; + + uint8_t amp_enabled_flag; + uint8_t sao_enabled; + + uint8_t long_term_ref_pics_present_flag; + uint16_t lt_ref_pic_poc_lsb_sps[32]; + uint8_t used_by_curr_pic_lt_sps_flag[32]; + uint8_t num_long_term_ref_pics_sps; + + struct { + uint8_t bit_depth; + uint8_t bit_depth_chroma; + unsigned int log2_min_pcm_cb_size; + unsigned int log2_max_pcm_cb_size; + uint8_t loop_filter_disable_flag; + } pcm; + uint8_t sps_temporal_mvp_enabled_flag; + uint8_t sps_strong_intra_smoothing_enable_flag; + + unsigned int log2_min_cb_size; + unsigned int log2_diff_max_min_coding_block_size; + unsigned int log2_min_tb_size; + unsigned int log2_max_trafo_size; + unsigned int log2_ctb_size; + unsigned int log2_min_pu_size; + + int max_transform_hierarchy_depth_inter; + int max_transform_hierarchy_depth_intra; + + int transform_skip_rotation_enabled_flag; + int transform_skip_context_enabled_flag; + int implicit_rdpcm_enabled_flag; + int explicit_rdpcm_enabled_flag; + int intra_smoothing_disabled_flag; + int persistent_rice_adaptation_enabled_flag; + + ///< coded frame dimension in various units + int width; + int height; + int ctb_width; + int ctb_height; + int ctb_size; + int min_cb_width; + int min_cb_height; + int min_tb_width; + int min_tb_height; + int min_pu_width; + int min_pu_height; + int tb_mask; + + int hshift[3]; + int vshift[3]; + + int qp_bd_offset; +} HEVCSPS; + +typedef struct HEVCPPS { + unsigned int sps_id; ///< seq_parameter_set_id + + uint8_t sign_data_hiding_flag; + + uint8_t cabac_init_present_flag; + + int num_ref_idx_l0_default_active; ///< num_ref_idx_l0_default_active_minus1 + 1 + int num_ref_idx_l1_default_active; ///< num_ref_idx_l1_default_active_minus1 + 1 + int pic_init_qp_minus26; + + uint8_t constrained_intra_pred_flag; + uint8_t transform_skip_enabled_flag; + + uint8_t cu_qp_delta_enabled_flag; + int diff_cu_qp_delta_depth; + + int cb_qp_offset; + int cr_qp_offset; + uint8_t pic_slice_level_chroma_qp_offsets_present_flag; + uint8_t weighted_pred_flag; + uint8_t weighted_bipred_flag; + uint8_t output_flag_present_flag; + uint8_t transquant_bypass_enable_flag; + + uint8_t dependent_slice_segments_enabled_flag; + uint8_t tiles_enabled_flag; + uint8_t entropy_coding_sync_enabled_flag; + + int num_tile_columns; ///< num_tile_columns_minus1 + 1 + int num_tile_rows; ///< num_tile_rows_minus1 + 1 + uint8_t uniform_spacing_flag; + uint8_t loop_filter_across_tiles_enabled_flag; + + uint8_t seq_loop_filter_across_slices_enabled_flag; + + uint8_t deblocking_filter_control_present_flag; + uint8_t deblocking_filter_override_enabled_flag; + uint8_t disable_dbf; + int beta_offset; ///< beta_offset_div2 * 2 + int tc_offset; ///< tc_offset_div2 * 2 + + uint8_t scaling_list_data_present_flag; + ScalingList scaling_list; + + uint8_t lists_modification_present_flag; + int log2_parallel_merge_level; ///< log2_parallel_merge_level_minus2 + 2 + int num_extra_slice_header_bits; + uint8_t slice_header_extension_present_flag; + uint8_t log2_max_transform_skip_block_size; + uint8_t cross_component_prediction_enabled_flag; + uint8_t chroma_qp_offset_list_enabled_flag; + uint8_t diff_cu_chroma_qp_offset_depth; + uint8_t chroma_qp_offset_list_len_minus1; + int8_t cb_qp_offset_list[5]; + int8_t cr_qp_offset_list[5]; + uint8_t log2_sao_offset_scale_luma; + uint8_t log2_sao_offset_scale_chroma; + + // Inferred parameters + unsigned int *column_width; ///< ColumnWidth + unsigned int *row_height; ///< RowHeight + unsigned int *col_bd; ///< ColBd + unsigned int *row_bd; ///< RowBd + int *col_idxX; + + int *ctb_addr_rs_to_ts; ///< CtbAddrRSToTS + int *ctb_addr_ts_to_rs; ///< CtbAddrTSToRS + int *tile_id; ///< TileId + int *tile_pos_rs; ///< TilePosRS + int *min_tb_addr_zs; ///< MinTbAddrZS + int *min_tb_addr_zs_tab;///< MinTbAddrZS +} HEVCPPS; + +typedef struct SliceHeader { + unsigned int pps_id; + + ///< address (in raster order) of the first block in the current slice segment + unsigned int slice_segment_addr; + ///< address (in raster order) of the first block in the current slice + unsigned int slice_addr; + + enum SliceType slice_type; + + int pic_order_cnt_lsb; + + uint8_t first_slice_in_pic_flag; + uint8_t dependent_slice_segment_flag; + uint8_t pic_output_flag; + uint8_t colour_plane_id; + + ///< RPS coded in the slice header itself is stored here + ShortTermRPS slice_rps; + const ShortTermRPS *short_term_rps; + LongTermRPS long_term_rps; + unsigned int list_entry_lx[2][32]; + + uint8_t rpl_modification_flag[2]; + uint8_t no_output_of_prior_pics_flag; + uint8_t slice_temporal_mvp_enabled_flag; + + unsigned int nb_refs[2]; + + uint8_t slice_sample_adaptive_offset_flag[3]; + uint8_t mvd_l1_zero_flag; + + uint8_t cabac_init_flag; + uint8_t disable_deblocking_filter_flag; ///< slice_header_disable_deblocking_filter_flag + uint8_t slice_loop_filter_across_slices_enabled_flag; + uint8_t collocated_list; + + unsigned int collocated_ref_idx; + + int slice_qp_delta; + int slice_cb_qp_offset; + int slice_cr_qp_offset; + + uint8_t cu_chroma_qp_offset_enabled_flag; + + int beta_offset; ///< beta_offset_div2 * 2 + int tc_offset; ///< tc_offset_div2 * 2 + + unsigned int max_num_merge_cand; ///< 5 - 5_minus_max_num_merge_cand + + int *entry_point_offset; + int * offset; + int * size; + int num_entry_point_offsets; + + int8_t slice_qp; + + uint8_t luma_log2_weight_denom; + int16_t chroma_log2_weight_denom; + + int16_t luma_weight_l0[16]; + int16_t chroma_weight_l0[16][2]; + int16_t chroma_weight_l1[16][2]; + int16_t luma_weight_l1[16]; + + int16_t luma_offset_l0[16]; + int16_t chroma_offset_l0[16][2]; + + int16_t luma_offset_l1[16]; + int16_t chroma_offset_l1[16][2]; + + int slice_ctb_addr_rs; +} SliceHeader; + +typedef struct CodingUnit { + int x; + int y; + + enum PredMode pred_mode; ///< PredMode + enum PartMode part_mode; ///< PartMode + + uint8_t rqt_root_cbf; + + uint8_t pcm_flag; + + // Inferred parameters + uint8_t intra_split_flag; ///< IntraSplitFlag + uint8_t max_trafo_depth; ///< MaxTrafoDepth + uint8_t cu_transquant_bypass_flag; +} CodingUnit; + +typedef struct Mv { + int16_t x; ///< horizontal component of motion vector + int16_t y; ///< vertical component of motion vector +} Mv; + +typedef struct MvField { + DECLARE_ALIGNED(4, Mv, mv)[2]; + int8_t ref_idx[2]; + int8_t pred_flag; +} MvField; + +typedef struct NeighbourAvailable { + int cand_bottom_left; + int cand_left; + int cand_up; + int cand_up_left; + int cand_up_right; + int cand_up_right_sap; +} NeighbourAvailable; + +typedef struct PredictionUnit { + int mpm_idx; + int rem_intra_luma_pred_mode; + uint8_t intra_pred_mode[4]; + Mv mvd; + uint8_t merge_flag; + uint8_t intra_pred_mode_c[4]; + uint8_t chroma_mode_c[4]; +} PredictionUnit; + +typedef struct TransformUnit { + int cu_qp_delta; + + int res_scale_val; + + // Inferred parameters; + int intra_pred_mode; + int intra_pred_mode_c; + int chroma_mode_c; + uint8_t is_cu_qp_delta_coded; + uint8_t is_cu_chroma_qp_offset_coded; + int8_t cu_qp_offset_cb; + int8_t cu_qp_offset_cr; + uint8_t cross_pf; +} TransformUnit; + +typedef struct DBParams { + int beta_offset; + int tc_offset; +} DBParams; + +#define HEVC_FRAME_FLAG_OUTPUT (1 << 0) +#define HEVC_FRAME_FLAG_SHORT_REF (1 << 1) +#define HEVC_FRAME_FLAG_LONG_REF (1 << 2) +#define HEVC_FRAME_FLAG_BUMPING (1 << 3) + +typedef struct HEVCFrame { + AVFrame *frame; + ThreadFrame tf; +#ifdef USE_PRED + MvField *tab_mvf; + RefPicList *refPicList; + RefPicListTab **rpl_tab; +#endif + int ctb_count; + int poc; + struct HEVCFrame *collocated_ref; + + HEVCWindow window; + +#ifdef USE_PRED + AVBufferRef *tab_mvf_buf; + AVBufferRef *rpl_tab_buf; + AVBufferRef *rpl_buf; +#endif + + /** + * A sequence counter, so that old frames are output first + * after a POC reset + */ + uint16_t sequence; + + /** + * A combination of HEVC_FRAME_FLAG_* + */ + uint8_t flags; +} HEVCFrame; + +typedef struct HEVCNAL { + uint8_t *rbsp_buffer; + int rbsp_buffer_size; + + int size; + const uint8_t *data; +} HEVCNAL; + +typedef struct HEVCLocalContext { + uint8_t cabac_state[HEVC_CONTEXTS]; + + uint8_t stat_coeff[4]; + + uint8_t first_qp_group; + + GetBitContext gb; + CABACContext cc; + + int8_t qp_y; + int8_t curr_qp_y; + + int qPy_pred; + + TransformUnit tu; + + uint8_t ctb_left_flag; + uint8_t ctb_up_flag; + uint8_t ctb_up_right_flag; + uint8_t ctb_up_left_flag; + int end_of_tiles_x; + int end_of_tiles_y; + /* +7 is for subpixel interpolation, *2 for high bit depths */ + DECLARE_ALIGNED(32, uint8_t, edge_emu_buffer)[(MAX_PB_SIZE + 7) * EDGE_EMU_BUFFER_STRIDE * 2]; + DECLARE_ALIGNED(32, uint8_t, edge_emu_buffer2)[(MAX_PB_SIZE + 7) * EDGE_EMU_BUFFER_STRIDE * 2]; + DECLARE_ALIGNED(16, int16_t, tmp [MAX_PB_SIZE * MAX_PB_SIZE]); + + int ct_depth; + CodingUnit cu; + PredictionUnit pu; + NeighbourAvailable na; + +#define BOUNDARY_LEFT_SLICE (1 << 0) +#define BOUNDARY_LEFT_TILE (1 << 1) +#define BOUNDARY_UPPER_SLICE (1 << 2) +#define BOUNDARY_UPPER_TILE (1 << 3) + /* properties of the boundary of the current CTB for the purposes + * of the deblocking filter */ + int boundary_flags; +} HEVCLocalContext; + +typedef struct HEVCContext { + const AVClass *c; // needed by private avoptions + AVCodecContext *avctx; + + struct HEVCContext *sList[MAX_NB_THREADS]; + + HEVCLocalContext *HEVClcList[MAX_NB_THREADS]; + HEVCLocalContext *HEVClc; + + uint8_t threads_type; + uint8_t threads_number; + + int width; + int height; + + uint8_t *cabac_state; + + /** 1 if the independent slice segment header was successfully parsed */ + uint8_t slice_initialized; + + AVFrame *frame; + AVFrame *output_frame; +#ifdef USE_SAO_SMALL_BUFFER + uint8_t *sao_pixel_buffer; + uint8_t *sao_pixel_buffer_h[3]; + uint8_t *sao_pixel_buffer_v[3]; +#else + AVFrame *tmp_frame; + AVFrame *sao_frame; +#endif + const HEVCVPS *vps; + const HEVCSPS *sps; + const HEVCPPS *pps; + AVBufferRef *vps_list[MAX_VPS_COUNT]; + AVBufferRef *sps_list[MAX_SPS_COUNT]; + AVBufferRef *pps_list[MAX_PPS_COUNT]; + + AVBufferRef *current_sps; + +#ifdef USE_PRED + AVBufferPool *tab_mvf_pool; + AVBufferPool *rpl_tab_pool; + + ///< candidate references for the current frame + RefPicList rps[5]; +#endif + + SliceHeader sh; + SAOParams *sao; + DBParams *deblock; + enum NALUnitType nal_unit_type; + int temporal_id; ///< temporal_id_plus1 - 1 + HEVCFrame *ref; + HEVCFrame DPB[MAX_DPB_COUNT]; + int poc; + int pocTid0; + int slice_idx; ///< number of the slice being currently decoded + int eos; ///< current packet contains an EOS/EOB NAL + int last_eos; ///< last packet contains an EOS/EOB NAL + int max_ra; + int bs_width; + int bs_height; + + int is_decoded; + +#ifdef USE_FUNC_PTR + HEVCPredContext hpc; +#endif + HEVCDSPContext hevcdsp; +#ifdef USE_PRED + VideoDSPContext vdsp; +#endif +#if HAVE_BIGENDIAN + BswapDSPContext bdsp; +#endif + int8_t *qp_y_tab; + uint8_t *horizontal_bs; + uint8_t *vertical_bs; + + int32_t *tab_slice_address; + + // CU + uint8_t *skip_flag; + uint8_t *tab_ct_depth; + // PU + uint8_t *tab_ipm; + + uint8_t *cbf_luma; // cbf_luma of colocated TU + uint8_t *is_pcm; + + // CTB-level flags affecting loop filter operation + uint8_t *filter_slice_edges; + + /** used on BE to byteswap the lines for checksumming */ + uint8_t *checksum_buf; + int checksum_buf_size; + + /** + * Sequence counters for decoded and output frames, so that old + * frames are output first after a POC reset + */ + uint16_t seq_decode; + uint16_t seq_output; + + int enable_parallel_tiles; + int wpp_err; + int skipped_bytes; + int *skipped_bytes_pos; + int skipped_bytes_pos_size; + + int *skipped_bytes_nal; + int **skipped_bytes_pos_nal; + int *skipped_bytes_pos_size_nal; + + const uint8_t *data; + + HEVCNAL *nals; + int nb_nals; + int nals_allocated; + // type of the first VCL NAL of the current frame + enum NALUnitType first_nal_type; + +#ifdef USE_MD5 + // for checking the frame checksums + struct AVMD5 *md5_ctx; +#endif + uint8_t md5[3][16]; + uint8_t is_md5; + + uint8_t context_initialized; + uint8_t is_nalff; ///< this flag is != 0 if bitstream is encapsulated + ///< as a format defined in 14496-15 + int apply_defdispwin; + + int active_seq_parameter_set_id; + + int nal_length_size; ///< Number of bytes used for nal length (1, 2 or 4) + int nuh_layer_id; + + /** frame packing arrangement variables */ + int sei_frame_packing_present; + int frame_packing_arrangement_type; + int content_interpretation_type; + int quincunx_subsampling; + + /** display orientation */ + int sei_display_orientation_present; + int sei_anticlockwise_rotation; + int sei_hflip, sei_vflip; + + int picture_struct; +#ifdef USE_FRAME_DURATION_SEI + uint16_t frame_duration; +#endif +} HEVCContext; + +int ff_hevc_decode_short_term_rps(HEVCContext *s, ShortTermRPS *rps, + const HEVCSPS *sps, int is_slice_header); +int ff_hevc_decode_nal_vps(HEVCContext *s); +int ff_hevc_decode_nal_sps(HEVCContext *s); +int ff_hevc_decode_nal_pps(HEVCContext *s); +int ff_hevc_decode_nal_sei(HEVCContext *s); + +int ff_hevc_extract_rbsp(HEVCContext *s, const uint8_t *src, int length, + HEVCNAL *nal); + +/** + * Mark all frames in DPB as unused for reference. + */ +void ff_hevc_clear_refs(HEVCContext *s); + +/** + * Drop all frames currently in DPB. + */ +void ff_hevc_flush_dpb(HEVCContext *s); + +/** + * Compute POC of the current frame and return it. + */ +int ff_hevc_compute_poc(HEVCContext *s, int poc_lsb); + +RefPicList *ff_hevc_get_ref_list(HEVCContext *s, HEVCFrame *frame, + int x0, int y0); + +/** + * Construct the reference picture sets for the current frame. + */ +int ff_hevc_frame_rps(HEVCContext *s); + +/** + * Construct the reference picture list(s) for the current slice. + */ +int ff_hevc_slice_rpl(HEVCContext *s); + +void ff_hevc_save_states(HEVCContext *s, int ctb_addr_ts); +void ff_hevc_cabac_init(HEVCContext *s, int ctb_addr_ts); +int ff_hevc_sao_merge_flag_decode(HEVCContext *s); +int ff_hevc_sao_type_idx_decode(HEVCContext *s); +int ff_hevc_sao_band_position_decode(HEVCContext *s); +int ff_hevc_sao_offset_abs_decode(HEVCContext *s); +int ff_hevc_sao_offset_sign_decode(HEVCContext *s); +int ff_hevc_sao_eo_class_decode(HEVCContext *s); +int ff_hevc_end_of_slice_flag_decode(HEVCContext *s); +int ff_hevc_cu_transquant_bypass_flag_decode(HEVCContext *s); +int ff_hevc_skip_flag_decode(HEVCContext *s, int x0, int y0, + int x_cb, int y_cb); +int ff_hevc_pred_mode_decode(HEVCContext *s); +int ff_hevc_split_coding_unit_flag_decode(HEVCContext *s, int ct_depth, + int x0, int y0); +int ff_hevc_part_mode_decode(HEVCContext *s, int log2_cb_size); +int ff_hevc_pcm_flag_decode(HEVCContext *s); +int ff_hevc_prev_intra_luma_pred_flag_decode(HEVCContext *s); +int ff_hevc_mpm_idx_decode(HEVCContext *s); +int ff_hevc_rem_intra_luma_pred_mode_decode(HEVCContext *s); +int ff_hevc_intra_chroma_pred_mode_decode(HEVCContext *s); +int ff_hevc_merge_idx_decode(HEVCContext *s); +int ff_hevc_merge_flag_decode(HEVCContext *s); +int ff_hevc_inter_pred_idc_decode(HEVCContext *s, int nPbW, int nPbH); +int ff_hevc_ref_idx_lx_decode(HEVCContext *s, int num_ref_idx_lx); +int ff_hevc_mvp_lx_flag_decode(HEVCContext *s); +int ff_hevc_no_residual_syntax_flag_decode(HEVCContext *s); +int ff_hevc_split_transform_flag_decode(HEVCContext *s, int log2_trafo_size); +int ff_hevc_cbf_cb_cr_decode(HEVCContext *s, int trafo_depth); +int ff_hevc_cbf_luma_decode(HEVCContext *s, int trafo_depth); +int ff_hevc_log2_res_scale_abs(HEVCContext *s, int idx); +int ff_hevc_res_scale_sign_flag(HEVCContext *s, int idx); + +/** + * Get the number of candidate references for the current frame. + */ +int ff_hevc_frame_nb_refs(HEVCContext *s); + +int ff_hevc_set_new_ref(HEVCContext *s, AVFrame **frame, int poc); + +/** + * Find next frame in output order and put a reference to it in frame. + * @return 1 if a frame was output, 0 otherwise + */ +int ff_hevc_output_frame(HEVCContext *s, AVFrame *frame, int flush); + +void ff_hevc_bump_frame(HEVCContext *s); + +void ff_hevc_unref_frame(HEVCContext *s, HEVCFrame *frame, int flags); + +void ff_hevc_set_neighbour_available(HEVCContext *s, int x0, int y0, + int nPbW, int nPbH); +void ff_hevc_luma_mv_merge_mode(HEVCContext *s, int x0, int y0, + int nPbW, int nPbH, int log2_cb_size, + int part_idx, int merge_idx, MvField *mv); +void ff_hevc_luma_mv_mvp_mode(HEVCContext *s, int x0, int y0, + int nPbW, int nPbH, int log2_cb_size, + int part_idx, int merge_idx, + MvField *mv, int mvp_lx_flag, int LX); +void ff_hevc_set_qPy(HEVCContext *s, int xBase, int yBase, + int log2_cb_size); +void ff_hevc_deblocking_boundary_strengths(HEVCContext *s, int x0, int y0, + int log2_trafo_size); +int ff_hevc_cu_qp_delta_sign_flag(HEVCContext *s); +int ff_hevc_cu_qp_delta_abs(HEVCContext *s); +int ff_hevc_cu_chroma_qp_offset_flag(HEVCContext *s); +int ff_hevc_cu_chroma_qp_offset_idx(HEVCContext *s); +void ff_hevc_hls_filter(HEVCContext *s, int x, int y, int ctb_size); +void ff_hevc_hls_filters(HEVCContext *s, int x_ctb, int y_ctb, int ctb_size); +void ff_hevc_hls_residual_coding(HEVCContext *s, int x0, int y0, + int log2_trafo_size, enum ScanType scan_idx, + int c_idx); + +void ff_hevc_hls_mvd_coding(HEVCContext *s, int x0, int y0, int log2_cb_size); + +#ifndef USE_FUNC_PTR +void intra_pred (HEVCContext *s, int x0, int y0, int log2_size, int c_idx); +#endif + +extern const uint8_t ff_hevc_qpel_extra_before[4]; +extern const uint8_t ff_hevc_qpel_extra_after[4]; +extern const uint8_t ff_hevc_qpel_extra[4]; + +extern const uint8_t ff_hevc_diag_scan4x4_x[16]; +extern const uint8_t ff_hevc_diag_scan4x4_y[16]; +extern const uint8_t ff_hevc_diag_scan8x8_x[64]; +extern const uint8_t ff_hevc_diag_scan8x8_y[64]; + +#endif /* AVCODEC_HEVC_H */