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https://github.com/FFmpeg/FFmpeg.git
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4aaace8b25
This is in preparation for a following patch. Reviewed-by: Hendrik Leppkes <h.leppkes@gmail.com> Reviewed-by: Aaron Levinson <alevinsn@aracnet.com> Signed-off-by: James Almer <jamrial@gmail.com>
436 lines
13 KiB
C
436 lines
13 KiB
C
/*
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* HEVC parameter set parsing
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVCODEC_HEVC_PS_H
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#define AVCODEC_HEVC_PS_H
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#include <stdint.h>
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#include "libavutil/buffer.h"
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#include "libavutil/pixfmt.h"
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#include "libavutil/rational.h"
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#include "avcodec.h"
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#include "get_bits.h"
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#include "hevc.h"
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typedef struct ShortTermRPS {
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unsigned int num_negative_pics;
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int num_delta_pocs;
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int rps_idx_num_delta_pocs;
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int32_t delta_poc[32];
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uint8_t used[32];
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} ShortTermRPS;
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typedef struct LongTermRPS {
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int poc[32];
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uint8_t used[32];
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uint8_t nb_refs;
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} LongTermRPS;
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typedef struct SliceHeader {
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unsigned int pps_id;
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///< address (in raster order) of the first block in the current slice segment
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unsigned int slice_segment_addr;
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///< address (in raster order) of the first block in the current slice
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unsigned int slice_addr;
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enum HEVCSliceType slice_type;
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int pic_order_cnt_lsb;
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uint8_t first_slice_in_pic_flag;
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uint8_t dependent_slice_segment_flag;
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uint8_t pic_output_flag;
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uint8_t colour_plane_id;
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///< RPS coded in the slice header itself is stored here
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int short_term_ref_pic_set_sps_flag;
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int short_term_ref_pic_set_size;
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ShortTermRPS slice_rps;
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const ShortTermRPS *short_term_rps;
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int long_term_ref_pic_set_size;
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LongTermRPS long_term_rps;
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unsigned int list_entry_lx[2][32];
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uint8_t rpl_modification_flag[2];
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uint8_t no_output_of_prior_pics_flag;
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uint8_t slice_temporal_mvp_enabled_flag;
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unsigned int nb_refs[2];
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uint8_t slice_sample_adaptive_offset_flag[3];
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uint8_t mvd_l1_zero_flag;
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uint8_t cabac_init_flag;
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uint8_t disable_deblocking_filter_flag; ///< slice_header_disable_deblocking_filter_flag
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uint8_t slice_loop_filter_across_slices_enabled_flag;
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uint8_t collocated_list;
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unsigned int collocated_ref_idx;
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int slice_qp_delta;
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int slice_cb_qp_offset;
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int slice_cr_qp_offset;
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uint8_t cu_chroma_qp_offset_enabled_flag;
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int beta_offset; ///< beta_offset_div2 * 2
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int tc_offset; ///< tc_offset_div2 * 2
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unsigned int max_num_merge_cand; ///< 5 - 5_minus_max_num_merge_cand
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unsigned *entry_point_offset;
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int * offset;
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int * size;
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int num_entry_point_offsets;
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int8_t slice_qp;
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uint8_t luma_log2_weight_denom;
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int16_t chroma_log2_weight_denom;
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int16_t luma_weight_l0[16];
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int16_t chroma_weight_l0[16][2];
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int16_t chroma_weight_l1[16][2];
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int16_t luma_weight_l1[16];
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int16_t luma_offset_l0[16];
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int16_t chroma_offset_l0[16][2];
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int16_t luma_offset_l1[16];
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int16_t chroma_offset_l1[16][2];
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int slice_ctb_addr_rs;
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} SliceHeader;
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typedef struct HEVCWindow {
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unsigned int left_offset;
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unsigned int right_offset;
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unsigned int top_offset;
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unsigned int bottom_offset;
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} HEVCWindow;
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typedef struct VUI {
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AVRational sar;
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int overscan_info_present_flag;
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int overscan_appropriate_flag;
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int video_signal_type_present_flag;
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int video_format;
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int video_full_range_flag;
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int colour_description_present_flag;
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uint8_t colour_primaries;
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uint8_t transfer_characteristic;
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uint8_t matrix_coeffs;
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int chroma_loc_info_present_flag;
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int chroma_sample_loc_type_top_field;
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int chroma_sample_loc_type_bottom_field;
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int neutra_chroma_indication_flag;
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int field_seq_flag;
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int frame_field_info_present_flag;
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int default_display_window_flag;
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HEVCWindow def_disp_win;
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int vui_timing_info_present_flag;
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uint32_t vui_num_units_in_tick;
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uint32_t vui_time_scale;
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int vui_poc_proportional_to_timing_flag;
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int vui_num_ticks_poc_diff_one_minus1;
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int vui_hrd_parameters_present_flag;
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int bitstream_restriction_flag;
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int tiles_fixed_structure_flag;
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int motion_vectors_over_pic_boundaries_flag;
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int restricted_ref_pic_lists_flag;
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int min_spatial_segmentation_idc;
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int max_bytes_per_pic_denom;
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int max_bits_per_min_cu_denom;
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int log2_max_mv_length_horizontal;
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int log2_max_mv_length_vertical;
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} VUI;
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typedef struct PTLCommon {
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uint8_t profile_space;
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uint8_t tier_flag;
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uint8_t profile_idc;
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uint8_t profile_compatibility_flag[32];
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uint8_t level_idc;
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uint8_t progressive_source_flag;
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uint8_t interlaced_source_flag;
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uint8_t non_packed_constraint_flag;
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uint8_t frame_only_constraint_flag;
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} PTLCommon;
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typedef struct PTL {
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PTLCommon general_ptl;
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PTLCommon sub_layer_ptl[HEVC_MAX_SUB_LAYERS];
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uint8_t sub_layer_profile_present_flag[HEVC_MAX_SUB_LAYERS];
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uint8_t sub_layer_level_present_flag[HEVC_MAX_SUB_LAYERS];
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} PTL;
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typedef struct HEVCVPS {
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uint8_t vps_temporal_id_nesting_flag;
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int vps_max_layers;
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int vps_max_sub_layers; ///< vps_max_temporal_layers_minus1 + 1
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PTL ptl;
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int vps_sub_layer_ordering_info_present_flag;
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unsigned int vps_max_dec_pic_buffering[HEVC_MAX_SUB_LAYERS];
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unsigned int vps_num_reorder_pics[HEVC_MAX_SUB_LAYERS];
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unsigned int vps_max_latency_increase[HEVC_MAX_SUB_LAYERS];
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int vps_max_layer_id;
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int vps_num_layer_sets; ///< vps_num_layer_sets_minus1 + 1
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uint8_t vps_timing_info_present_flag;
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uint32_t vps_num_units_in_tick;
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uint32_t vps_time_scale;
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uint8_t vps_poc_proportional_to_timing_flag;
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int vps_num_ticks_poc_diff_one; ///< vps_num_ticks_poc_diff_one_minus1 + 1
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int vps_num_hrd_parameters;
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uint8_t data[4096];
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int data_size;
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} HEVCVPS;
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typedef struct ScalingList {
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/* This is a little wasteful, since sizeID 0 only needs 8 coeffs,
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* and size ID 3 only has 2 arrays, not 6. */
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uint8_t sl[4][6][64];
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uint8_t sl_dc[2][6];
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} ScalingList;
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typedef struct HEVCSPS {
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unsigned vps_id;
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int chroma_format_idc;
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uint8_t separate_colour_plane_flag;
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///< output (i.e. cropped) values
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int output_width, output_height;
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HEVCWindow output_window;
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HEVCWindow pic_conf_win;
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int bit_depth;
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int pixel_shift;
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enum AVPixelFormat pix_fmt;
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unsigned int log2_max_poc_lsb;
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int pcm_enabled_flag;
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int max_sub_layers;
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struct {
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int max_dec_pic_buffering;
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int num_reorder_pics;
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int max_latency_increase;
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} temporal_layer[HEVC_MAX_SUB_LAYERS];
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VUI vui;
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PTL ptl;
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uint8_t scaling_list_enable_flag;
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ScalingList scaling_list;
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unsigned int nb_st_rps;
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ShortTermRPS st_rps[HEVC_MAX_SHORT_TERM_RPS_COUNT];
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uint8_t amp_enabled_flag;
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uint8_t sao_enabled;
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uint8_t long_term_ref_pics_present_flag;
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uint16_t lt_ref_pic_poc_lsb_sps[32];
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uint8_t used_by_curr_pic_lt_sps_flag[32];
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uint8_t num_long_term_ref_pics_sps;
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struct {
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uint8_t bit_depth;
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uint8_t bit_depth_chroma;
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unsigned int log2_min_pcm_cb_size;
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unsigned int log2_max_pcm_cb_size;
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uint8_t loop_filter_disable_flag;
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} pcm;
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uint8_t sps_temporal_mvp_enabled_flag;
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uint8_t sps_strong_intra_smoothing_enable_flag;
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unsigned int log2_min_cb_size;
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unsigned int log2_diff_max_min_coding_block_size;
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unsigned int log2_min_tb_size;
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unsigned int log2_max_trafo_size;
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unsigned int log2_ctb_size;
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unsigned int log2_min_pu_size;
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int max_transform_hierarchy_depth_inter;
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int max_transform_hierarchy_depth_intra;
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int transform_skip_rotation_enabled_flag;
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int transform_skip_context_enabled_flag;
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int implicit_rdpcm_enabled_flag;
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int explicit_rdpcm_enabled_flag;
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int intra_smoothing_disabled_flag;
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int persistent_rice_adaptation_enabled_flag;
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///< coded frame dimension in various units
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int width;
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int height;
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int ctb_width;
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int ctb_height;
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int ctb_size;
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int min_cb_width;
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int min_cb_height;
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int min_tb_width;
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int min_tb_height;
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int min_pu_width;
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int min_pu_height;
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int tb_mask;
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int hshift[3];
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int vshift[3];
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int qp_bd_offset;
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uint8_t data[4096];
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int data_size;
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} HEVCSPS;
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typedef struct HEVCPPS {
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unsigned int sps_id; ///< seq_parameter_set_id
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uint8_t sign_data_hiding_flag;
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uint8_t cabac_init_present_flag;
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int num_ref_idx_l0_default_active; ///< num_ref_idx_l0_default_active_minus1 + 1
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int num_ref_idx_l1_default_active; ///< num_ref_idx_l1_default_active_minus1 + 1
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int pic_init_qp_minus26;
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uint8_t constrained_intra_pred_flag;
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uint8_t transform_skip_enabled_flag;
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uint8_t cu_qp_delta_enabled_flag;
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int diff_cu_qp_delta_depth;
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int cb_qp_offset;
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int cr_qp_offset;
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uint8_t pic_slice_level_chroma_qp_offsets_present_flag;
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uint8_t weighted_pred_flag;
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uint8_t weighted_bipred_flag;
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uint8_t output_flag_present_flag;
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uint8_t transquant_bypass_enable_flag;
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uint8_t dependent_slice_segments_enabled_flag;
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uint8_t tiles_enabled_flag;
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uint8_t entropy_coding_sync_enabled_flag;
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int num_tile_columns; ///< num_tile_columns_minus1 + 1
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int num_tile_rows; ///< num_tile_rows_minus1 + 1
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uint8_t uniform_spacing_flag;
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uint8_t loop_filter_across_tiles_enabled_flag;
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uint8_t seq_loop_filter_across_slices_enabled_flag;
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uint8_t deblocking_filter_control_present_flag;
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uint8_t deblocking_filter_override_enabled_flag;
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uint8_t disable_dbf;
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int beta_offset; ///< beta_offset_div2 * 2
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int tc_offset; ///< tc_offset_div2 * 2
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uint8_t scaling_list_data_present_flag;
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ScalingList scaling_list;
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uint8_t lists_modification_present_flag;
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int log2_parallel_merge_level; ///< log2_parallel_merge_level_minus2 + 2
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int num_extra_slice_header_bits;
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uint8_t slice_header_extension_present_flag;
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uint8_t log2_max_transform_skip_block_size;
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uint8_t cross_component_prediction_enabled_flag;
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uint8_t chroma_qp_offset_list_enabled_flag;
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uint8_t diff_cu_chroma_qp_offset_depth;
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uint8_t chroma_qp_offset_list_len_minus1;
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int8_t cb_qp_offset_list[5];
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int8_t cr_qp_offset_list[5];
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uint8_t log2_sao_offset_scale_luma;
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uint8_t log2_sao_offset_scale_chroma;
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// Inferred parameters
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unsigned int *column_width; ///< ColumnWidth
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unsigned int *row_height; ///< RowHeight
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unsigned int *col_bd; ///< ColBd
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unsigned int *row_bd; ///< RowBd
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int *col_idxX;
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int *ctb_addr_rs_to_ts; ///< CtbAddrRSToTS
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int *ctb_addr_ts_to_rs; ///< CtbAddrTSToRS
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int *tile_id; ///< TileId
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int *tile_pos_rs; ///< TilePosRS
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int *min_tb_addr_zs; ///< MinTbAddrZS
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int *min_tb_addr_zs_tab;///< MinTbAddrZS
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uint8_t data[4096];
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int data_size;
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} HEVCPPS;
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typedef struct HEVCParamSets {
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AVBufferRef *vps_list[HEVC_MAX_VPS_COUNT];
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AVBufferRef *sps_list[HEVC_MAX_SPS_COUNT];
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AVBufferRef *pps_list[HEVC_MAX_PPS_COUNT];
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/* currently active parameter sets */
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const HEVCVPS *vps;
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const HEVCSPS *sps;
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const HEVCPPS *pps;
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} HEVCParamSets;
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/**
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* Parse the SPS from the bitstream into the provided HEVCSPS struct.
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*
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* @param sps_id the SPS id will be written here
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* @param apply_defdispwin if set 1, the default display window from the VUI
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* will be applied to the video dimensions
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* @param vps_list if non-NULL, this function will validate that the SPS refers
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* to an existing VPS
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*/
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int ff_hevc_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id,
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int apply_defdispwin, AVBufferRef **vps_list, AVCodecContext *avctx);
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int ff_hevc_decode_nal_vps(GetBitContext *gb, AVCodecContext *avctx,
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HEVCParamSets *ps);
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int ff_hevc_decode_nal_sps(GetBitContext *gb, AVCodecContext *avctx,
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HEVCParamSets *ps, int apply_defdispwin);
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int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,
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HEVCParamSets *ps);
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int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx,
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ShortTermRPS *rps, const HEVCSPS *sps, int is_slice_header);
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int ff_hevc_encode_nal_vps(HEVCVPS *vps, unsigned int id,
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uint8_t *buf, int buf_size);
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/**
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* Compute POC of the current frame and return it.
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*/
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int ff_hevc_compute_poc(const HEVCSPS *sps, int pocTid0, int poc_lsb, int nal_unit_type);
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#endif /* AVCODEC_HEVC_PS_H */
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