2 * HEVC parameter set parsing
4 * This file is part of FFmpeg.
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #ifndef AVCODEC_HEVC_PS_H
22 #define AVCODEC_HEVC_PS_H
26 #include "libavutil/buffer.h"
27 #include "libavutil/pixfmt.h"
28 #include "libavutil/rational.h"
34 typedef struct ShortTermRPS {
35 unsigned int num_negative_pics;
37 int rps_idx_num_delta_pocs;
38 int32_t delta_poc[32];
42 typedef struct HEVCWindow {
43 unsigned int left_offset;
44 unsigned int right_offset;
45 unsigned int top_offset;
46 unsigned int bottom_offset;
52 int overscan_info_present_flag;
53 int overscan_appropriate_flag;
55 int video_signal_type_present_flag;
57 int video_full_range_flag;
58 int colour_description_present_flag;
59 uint8_t colour_primaries;
60 uint8_t transfer_characteristic;
61 uint8_t matrix_coeffs;
63 int chroma_loc_info_present_flag;
64 int chroma_sample_loc_type_top_field;
65 int chroma_sample_loc_type_bottom_field;
66 int neutra_chroma_indication_flag;
69 int frame_field_info_present_flag;
71 int default_display_window_flag;
72 HEVCWindow def_disp_win;
74 int vui_timing_info_present_flag;
75 uint32_t vui_num_units_in_tick;
76 uint32_t vui_time_scale;
77 int vui_poc_proportional_to_timing_flag;
78 int vui_num_ticks_poc_diff_one_minus1;
79 int vui_hrd_parameters_present_flag;
81 int bitstream_restriction_flag;
82 int tiles_fixed_structure_flag;
83 int motion_vectors_over_pic_boundaries_flag;
84 int restricted_ref_pic_lists_flag;
85 int min_spatial_segmentation_idc;
86 int max_bytes_per_pic_denom;
87 int max_bits_per_min_cu_denom;
88 int log2_max_mv_length_horizontal;
89 int log2_max_mv_length_vertical;
92 typedef struct PTLCommon {
93 uint8_t profile_space;
96 uint8_t profile_compatibility_flag[32];
97 uint8_t progressive_source_flag;
98 uint8_t interlaced_source_flag;
99 uint8_t non_packed_constraint_flag;
100 uint8_t frame_only_constraint_flag;
101 uint8_t max_12bit_constraint_flag;
102 uint8_t max_10bit_constraint_flag;
103 uint8_t max_8bit_constraint_flag;
104 uint8_t max_422chroma_constraint_flag;
105 uint8_t max_420chroma_constraint_flag;
106 uint8_t max_monochrome_constraint_flag;
107 uint8_t intra_constraint_flag;
108 uint8_t one_picture_only_constraint_flag;
109 uint8_t lower_bit_rate_constraint_flag;
110 uint8_t max_14bit_constraint_flag;
116 PTLCommon general_ptl;
117 PTLCommon sub_layer_ptl[HEVC_MAX_SUB_LAYERS];
119 uint8_t sub_layer_profile_present_flag[HEVC_MAX_SUB_LAYERS];
120 uint8_t sub_layer_level_present_flag[HEVC_MAX_SUB_LAYERS];
123 typedef struct HEVCVPS {
124 uint8_t vps_temporal_id_nesting_flag;
126 int vps_max_sub_layers; ///< vps_max_temporal_layers_minus1 + 1
129 int vps_sub_layer_ordering_info_present_flag;
130 unsigned int vps_max_dec_pic_buffering[HEVC_MAX_SUB_LAYERS];
131 unsigned int vps_num_reorder_pics[HEVC_MAX_SUB_LAYERS];
132 unsigned int vps_max_latency_increase[HEVC_MAX_SUB_LAYERS];
133 int vps_max_layer_id;
134 int vps_num_layer_sets; ///< vps_num_layer_sets_minus1 + 1
135 uint8_t vps_timing_info_present_flag;
136 uint32_t vps_num_units_in_tick;
137 uint32_t vps_time_scale;
138 uint8_t vps_poc_proportional_to_timing_flag;
139 int vps_num_ticks_poc_diff_one; ///< vps_num_ticks_poc_diff_one_minus1 + 1
140 int vps_num_hrd_parameters;
146 typedef struct ScalingList {
147 /* This is a little wasteful, since sizeID 0 only needs 8 coeffs,
148 * and size ID 3 only has 2 arrays, not 6. */
149 uint8_t sl[4][6][64];
153 typedef struct HEVCSPS {
155 int chroma_format_idc;
156 uint8_t separate_colour_plane_flag;
158 HEVCWindow output_window;
160 HEVCWindow pic_conf_win;
163 int bit_depth_chroma;
165 enum AVPixelFormat pix_fmt;
167 unsigned int log2_max_poc_lsb;
168 int pcm_enabled_flag;
172 int max_dec_pic_buffering;
173 int num_reorder_pics;
174 int max_latency_increase;
175 } temporal_layer[HEVC_MAX_SUB_LAYERS];
176 uint8_t temporal_id_nesting_flag;
181 uint8_t scaling_list_enable_flag;
182 ScalingList scaling_list;
184 unsigned int nb_st_rps;
185 ShortTermRPS st_rps[HEVC_MAX_SHORT_TERM_REF_PIC_SETS];
187 uint8_t amp_enabled_flag;
190 uint8_t long_term_ref_pics_present_flag;
191 uint16_t lt_ref_pic_poc_lsb_sps[HEVC_MAX_LONG_TERM_REF_PICS];
192 uint8_t used_by_curr_pic_lt_sps_flag[HEVC_MAX_LONG_TERM_REF_PICS];
193 uint8_t num_long_term_ref_pics_sps;
197 uint8_t bit_depth_chroma;
198 unsigned int log2_min_pcm_cb_size;
199 unsigned int log2_max_pcm_cb_size;
200 uint8_t loop_filter_disable_flag;
202 uint8_t sps_temporal_mvp_enabled_flag;
203 uint8_t sps_strong_intra_smoothing_enable_flag;
205 unsigned int log2_min_cb_size;
206 unsigned int log2_diff_max_min_coding_block_size;
207 unsigned int log2_min_tb_size;
208 unsigned int log2_max_trafo_size;
209 unsigned int log2_ctb_size;
210 unsigned int log2_min_pu_size;
212 int max_transform_hierarchy_depth_inter;
213 int max_transform_hierarchy_depth_intra;
215 int sps_range_extension_flag;
216 int transform_skip_rotation_enabled_flag;
217 int transform_skip_context_enabled_flag;
218 int implicit_rdpcm_enabled_flag;
219 int explicit_rdpcm_enabled_flag;
220 int extended_precision_processing_flag;
221 int intra_smoothing_disabled_flag;
222 int high_precision_offsets_enabled_flag;
223 int persistent_rice_adaptation_enabled_flag;
224 int cabac_bypass_alignment_enabled_flag;
226 ///< coded frame dimension in various units
249 typedef struct HEVCPPS {
250 unsigned int sps_id; ///< seq_parameter_set_id
252 uint8_t sign_data_hiding_flag;
254 uint8_t cabac_init_present_flag;
256 int num_ref_idx_l0_default_active; ///< num_ref_idx_l0_default_active_minus1 + 1
257 int num_ref_idx_l1_default_active; ///< num_ref_idx_l1_default_active_minus1 + 1
258 int pic_init_qp_minus26;
260 uint8_t constrained_intra_pred_flag;
261 uint8_t transform_skip_enabled_flag;
263 uint8_t cu_qp_delta_enabled_flag;
264 int diff_cu_qp_delta_depth;
268 uint8_t pic_slice_level_chroma_qp_offsets_present_flag;
269 uint8_t weighted_pred_flag;
270 uint8_t weighted_bipred_flag;
271 uint8_t output_flag_present_flag;
272 uint8_t transquant_bypass_enable_flag;
274 uint8_t dependent_slice_segments_enabled_flag;
275 uint8_t tiles_enabled_flag;
276 uint8_t entropy_coding_sync_enabled_flag;
278 uint16_t num_tile_columns; ///< num_tile_columns_minus1 + 1
279 uint16_t num_tile_rows; ///< num_tile_rows_minus1 + 1
280 uint8_t uniform_spacing_flag;
281 uint8_t loop_filter_across_tiles_enabled_flag;
283 uint8_t seq_loop_filter_across_slices_enabled_flag;
285 uint8_t deblocking_filter_control_present_flag;
286 uint8_t deblocking_filter_override_enabled_flag;
288 int beta_offset; ///< beta_offset_div2 * 2
289 int tc_offset; ///< tc_offset_div2 * 2
291 uint8_t scaling_list_data_present_flag;
292 ScalingList scaling_list;
294 uint8_t lists_modification_present_flag;
295 int log2_parallel_merge_level; ///< log2_parallel_merge_level_minus2 + 2
296 int num_extra_slice_header_bits;
297 uint8_t slice_header_extension_present_flag;
298 uint8_t log2_max_transform_skip_block_size;
299 uint8_t pps_range_extensions_flag;
300 uint8_t cross_component_prediction_enabled_flag;
301 uint8_t chroma_qp_offset_list_enabled_flag;
302 uint8_t diff_cu_chroma_qp_offset_depth;
303 uint8_t chroma_qp_offset_list_len_minus1;
304 int8_t cb_qp_offset_list[6];
305 int8_t cr_qp_offset_list[6];
306 uint8_t log2_sao_offset_scale_luma;
307 uint8_t log2_sao_offset_scale_chroma;
309 // Inferred parameters
310 unsigned int *column_width; ///< ColumnWidth
311 unsigned int *row_height; ///< RowHeight
312 unsigned int *col_bd; ///< ColBd
313 unsigned int *row_bd; ///< RowBd
316 int *ctb_addr_rs_to_ts; ///< CtbAddrRSToTS
317 int *ctb_addr_ts_to_rs; ///< CtbAddrTSToRS
318 int *tile_id; ///< TileId
319 int *tile_pos_rs; ///< TilePosRS
320 int *min_tb_addr_zs; ///< MinTbAddrZS
321 int *min_tb_addr_zs_tab;///< MinTbAddrZS
327 typedef struct HEVCParamSets {
328 AVBufferRef *vps_list[HEVC_MAX_VPS_COUNT];
329 AVBufferRef *sps_list[HEVC_MAX_SPS_COUNT];
330 AVBufferRef *pps_list[HEVC_MAX_PPS_COUNT];
332 /* currently active parameter sets */
339 * Parse the SPS from the bitstream into the provided HEVCSPS struct.
341 * @param sps_id the SPS id will be written here
342 * @param apply_defdispwin if set 1, the default display window from the VUI
343 * will be applied to the video dimensions
344 * @param vps_list if non-NULL, this function will validate that the SPS refers
347 int ff_hevc_parse_sps(HEVCSPS *sps, GetBitContext *gb, unsigned int *sps_id,
348 int apply_defdispwin, AVBufferRef **vps_list, AVCodecContext *avctx);
350 int ff_hevc_decode_nal_vps(GetBitContext *gb, AVCodecContext *avctx,
352 int ff_hevc_decode_nal_sps(GetBitContext *gb, AVCodecContext *avctx,
353 HEVCParamSets *ps, int apply_defdispwin);
354 int ff_hevc_decode_nal_pps(GetBitContext *gb, AVCodecContext *avctx,
357 void ff_hevc_ps_uninit(HEVCParamSets *ps);
359 int ff_hevc_decode_short_term_rps(GetBitContext *gb, AVCodecContext *avctx,
360 ShortTermRPS *rps, const HEVCSPS *sps, int is_slice_header);
362 int ff_hevc_encode_nal_vps(HEVCVPS *vps, unsigned int id,
363 uint8_t *buf, int buf_size);
366 * Compute POC of the current frame and return it.
368 int ff_hevc_compute_poc(const HEVCSPS *sps, int pocTid0, int poc_lsb, int nal_unit_type);
370 #endif /* AVCODEC_HEVC_PS_H */