2 * This file is part of FFmpeg.
4 * FFmpeg is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * FFmpeg is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with FFmpeg; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 #ifndef AVCODEC_CBS_H264_H
20 #define AVCODEC_CBS_H264_H
26 #include "cbs_h2645.h"
31 // This limit is arbitrary - it is sufficient for one message of each
32 // type plus some repeats, and will therefore easily cover all sane
33 // streams. However, it is possible to make technically-valid streams
34 // for which it will fail (for example, by including a large number of
35 // user-data-unregistered messages).
36 H264_MAX_SEI_PAYLOADS = 64,
40 typedef struct H264RawNALUnitHeader {
41 uint8_t forbidden_zero_bit;
43 uint8_t nal_unit_type;
45 uint8_t svc_extension_flag;
46 uint8_t avc_3d_extension_flag;
47 } H264RawNALUnitHeader;
49 typedef struct H264RawScalingList {
50 int8_t delta_scale[64];
53 typedef struct H264RawHRD {
54 uint8_t cpb_cnt_minus1;
55 uint8_t bit_rate_scale;
56 uint8_t cpb_size_scale;
58 uint32_t bit_rate_value_minus1[H264_MAX_CPB_CNT];
59 uint32_t cpb_size_value_minus1[H264_MAX_CPB_CNT];
60 uint8_t cbr_flag[H264_MAX_CPB_CNT];
62 uint8_t initial_cpb_removal_delay_length_minus1;
63 uint8_t cpb_removal_delay_length_minus1;
64 uint8_t dpb_output_delay_length_minus1;
65 uint8_t time_offset_length;
68 typedef struct H264RawVUI {
69 uint8_t aspect_ratio_info_present_flag;
70 uint8_t aspect_ratio_idc;
74 uint8_t overscan_info_present_flag;
75 uint8_t overscan_appropriate_flag;
77 uint8_t video_signal_type_present_flag;
79 uint8_t video_full_range_flag;
80 uint8_t colour_description_present_flag;
81 uint8_t colour_primaries;
82 uint8_t transfer_characteristics;
83 uint8_t matrix_coefficients;
85 uint8_t chroma_loc_info_present_flag;
86 uint8_t chroma_sample_loc_type_top_field;
87 uint8_t chroma_sample_loc_type_bottom_field;
89 uint8_t timing_info_present_flag;
90 uint32_t num_units_in_tick;
92 uint8_t fixed_frame_rate_flag;
94 uint8_t nal_hrd_parameters_present_flag;
95 H264RawHRD nal_hrd_parameters;
96 uint8_t vcl_hrd_parameters_present_flag;
97 H264RawHRD vcl_hrd_parameters;
98 uint8_t low_delay_hrd_flag;
100 uint8_t pic_struct_present_flag;
102 uint8_t bitstream_restriction_flag;
103 uint8_t motion_vectors_over_pic_boundaries_flag;
104 uint8_t max_bytes_per_pic_denom;
105 uint8_t max_bits_per_mb_denom;
106 uint8_t log2_max_mv_length_horizontal;
107 uint8_t log2_max_mv_length_vertical;
108 uint8_t max_num_reorder_frames;
109 uint8_t max_dec_frame_buffering;
112 typedef struct H264RawSPS {
113 H264RawNALUnitHeader nal_unit_header;
116 uint8_t constraint_set0_flag;
117 uint8_t constraint_set1_flag;
118 uint8_t constraint_set2_flag;
119 uint8_t constraint_set3_flag;
120 uint8_t constraint_set4_flag;
121 uint8_t constraint_set5_flag;
122 uint8_t reserved_zero_2bits;
125 uint8_t seq_parameter_set_id;
127 uint8_t chroma_format_idc;
128 uint8_t separate_colour_plane_flag;
129 uint8_t bit_depth_luma_minus8;
130 uint8_t bit_depth_chroma_minus8;
131 uint8_t qpprime_y_zero_transform_bypass_flag;
133 uint8_t seq_scaling_matrix_present_flag;
134 uint8_t seq_scaling_list_present_flag[12];
135 H264RawScalingList scaling_list_4x4[6];
136 H264RawScalingList scaling_list_8x8[6];
138 uint8_t log2_max_frame_num_minus4;
139 uint8_t pic_order_cnt_type;
140 uint8_t log2_max_pic_order_cnt_lsb_minus4;
141 uint8_t delta_pic_order_always_zero_flag;
142 int32_t offset_for_non_ref_pic;
143 int32_t offset_for_top_to_bottom_field;
144 uint8_t num_ref_frames_in_pic_order_cnt_cycle;
145 int32_t offset_for_ref_frame[256];
147 uint8_t max_num_ref_frames;
148 uint8_t gaps_in_frame_num_allowed_flag;
150 uint16_t pic_width_in_mbs_minus1;
151 uint16_t pic_height_in_map_units_minus1;
153 uint8_t frame_mbs_only_flag;
154 uint8_t mb_adaptive_frame_field_flag;
155 uint8_t direct_8x8_inference_flag;
157 uint8_t frame_cropping_flag;
158 uint16_t frame_crop_left_offset;
159 uint16_t frame_crop_right_offset;
160 uint16_t frame_crop_top_offset;
161 uint16_t frame_crop_bottom_offset;
163 uint8_t vui_parameters_present_flag;
167 typedef struct H264RawSPSExtension {
168 H264RawNALUnitHeader nal_unit_header;
170 uint8_t seq_parameter_set_id;
172 uint8_t aux_format_idc;
173 uint8_t bit_depth_aux_minus8;
174 uint8_t alpha_incr_flag;
175 uint16_t alpha_opaque_value;
176 uint16_t alpha_transparent_value;
178 uint8_t additional_extension_flag;
179 } H264RawSPSExtension;
181 typedef struct H264RawPPS {
182 H264RawNALUnitHeader nal_unit_header;
184 uint8_t pic_parameter_set_id;
185 uint8_t seq_parameter_set_id;
187 uint8_t entropy_coding_mode_flag;
188 uint8_t bottom_field_pic_order_in_frame_present_flag;
190 uint8_t num_slice_groups_minus1;
191 uint8_t slice_group_map_type;
192 uint16_t run_length_minus1[H264_MAX_SLICE_GROUPS];
193 uint16_t top_left[H264_MAX_SLICE_GROUPS];
194 uint16_t bottom_right[H264_MAX_SLICE_GROUPS];
195 uint8_t slice_group_change_direction_flag;
196 uint16_t slice_group_change_rate_minus1;
197 uint16_t pic_size_in_map_units_minus1;
199 uint8_t *slice_group_id;
200 AVBufferRef *slice_group_id_ref;
202 uint8_t num_ref_idx_l0_default_active_minus1;
203 uint8_t num_ref_idx_l1_default_active_minus1;
205 uint8_t weighted_pred_flag;
206 uint8_t weighted_bipred_idc;
208 int8_t pic_init_qp_minus26;
209 int8_t pic_init_qs_minus26;
210 int8_t chroma_qp_index_offset;
212 uint8_t deblocking_filter_control_present_flag;
213 uint8_t constrained_intra_pred_flag;
215 uint8_t more_rbsp_data;
217 uint8_t redundant_pic_cnt_present_flag;
218 uint8_t transform_8x8_mode_flag;
220 uint8_t pic_scaling_matrix_present_flag;
221 uint8_t pic_scaling_list_present_flag[12];
222 H264RawScalingList scaling_list_4x4[6];
223 H264RawScalingList scaling_list_8x8[6];
225 int8_t second_chroma_qp_index_offset;
228 typedef struct H264RawAUD {
229 H264RawNALUnitHeader nal_unit_header;
231 uint8_t primary_pic_type;
234 typedef struct H264RawSEIBufferingPeriod {
235 uint8_t seq_parameter_set_id;
237 uint32_t initial_cpb_removal_delay[H264_MAX_CPB_CNT];
238 uint32_t initial_cpb_removal_delay_offset[H264_MAX_CPB_CNT];
240 } H264RawSEIBufferingPeriod;
242 typedef struct H264RawSEIPicTimestamp {
244 uint8_t nuit_field_based_flag;
245 uint8_t counting_type;
246 uint8_t full_timestamp_flag;
247 uint8_t discontinuity_flag;
248 uint8_t cnt_dropped_flag;
250 uint8_t seconds_flag;
251 uint8_t seconds_value;
252 uint8_t minutes_flag;
253 uint8_t minutes_value;
256 uint32_t time_offset;
257 } H264RawSEIPicTimestamp;
259 typedef struct H264RawSEIPicTiming {
260 uint32_t cpb_removal_delay;
261 uint32_t dpb_output_delay;
263 uint8_t clock_timestamp_flag[3];
264 H264RawSEIPicTimestamp timestamp[3];
265 } H264RawSEIPicTiming;
267 typedef struct H264RawSEIUserDataRegistered {
268 uint8_t itu_t_t35_country_code;
269 uint8_t itu_t_t35_country_code_extension_byte;
272 AVBufferRef *data_ref;
273 } H264RawSEIUserDataRegistered;
275 typedef struct H264RawSEIUserDataUnregistered {
276 uint8_t uuid_iso_iec_11578[16];
279 AVBufferRef *data_ref;
280 } H264RawSEIUserDataUnregistered;
282 typedef struct H264RawSEIRecoveryPoint {
283 uint16_t recovery_frame_cnt;
284 uint8_t exact_match_flag;
285 uint8_t broken_link_flag;
286 uint8_t changing_slice_group_idc;
287 } H264RawSEIRecoveryPoint;
289 typedef struct H264RawSEIDisplayOrientation {
290 uint8_t display_orientation_cancel_flag;
293 uint16_t anticlockwise_rotation;
294 uint16_t display_orientation_repetition_period;
295 uint8_t display_orientation_extension_flag;
296 } H264RawSEIDisplayOrientation;
298 typedef struct H264RawSEIPayload {
299 uint32_t payload_type;
300 uint32_t payload_size;
302 H264RawSEIBufferingPeriod buffering_period;
303 H264RawSEIPicTiming pic_timing;
304 // H264RawSEIFiller filler -> no fields.
305 H264RawSEIUserDataRegistered user_data_registered;
306 H264RawSEIUserDataUnregistered user_data_unregistered;
307 H264RawSEIRecoveryPoint recovery_point;
308 H264RawSEIDisplayOrientation display_orientation;
312 AVBufferRef *data_ref;
317 typedef struct H264RawSEI {
318 H264RawNALUnitHeader nal_unit_header;
320 H264RawSEIPayload payload[H264_MAX_SEI_PAYLOADS];
321 uint8_t payload_count;
324 typedef struct H264RawSliceHeader {
325 H264RawNALUnitHeader nal_unit_header;
327 uint32_t first_mb_in_slice;
330 uint8_t pic_parameter_set_id;
332 uint8_t colour_plane_id;
335 uint8_t field_pic_flag;
336 uint8_t bottom_field_flag;
340 uint16_t pic_order_cnt_lsb;
341 int32_t delta_pic_order_cnt_bottom;
342 int32_t delta_pic_order_cnt[2];
344 uint8_t redundant_pic_cnt;
345 uint8_t direct_spatial_mv_pred_flag;
347 uint8_t num_ref_idx_active_override_flag;
348 uint8_t num_ref_idx_l0_active_minus1;
349 uint8_t num_ref_idx_l1_active_minus1;
351 uint8_t ref_pic_list_modification_flag_l0;
352 uint8_t ref_pic_list_modification_flag_l1;
354 uint8_t modification_of_pic_nums_idc;
355 int32_t abs_diff_pic_num_minus1;
356 uint8_t long_term_pic_num;
357 } rplm_l0[H264_MAX_RPLM_COUNT], rplm_l1[H264_MAX_RPLM_COUNT];
359 uint8_t luma_log2_weight_denom;
360 uint8_t chroma_log2_weight_denom;
362 uint8_t luma_weight_l0_flag[H264_MAX_REFS];
363 int8_t luma_weight_l0[H264_MAX_REFS];
364 int8_t luma_offset_l0[H264_MAX_REFS];
365 uint8_t chroma_weight_l0_flag[H264_MAX_REFS];
366 int8_t chroma_weight_l0[H264_MAX_REFS][2];
367 int8_t chroma_offset_l0[H264_MAX_REFS][2];
369 uint8_t luma_weight_l1_flag[H264_MAX_REFS];
370 int8_t luma_weight_l1[H264_MAX_REFS];
371 int8_t luma_offset_l1[H264_MAX_REFS];
372 uint8_t chroma_weight_l1_flag[H264_MAX_REFS];
373 int8_t chroma_weight_l1[H264_MAX_REFS][2];
374 int8_t chroma_offset_l1[H264_MAX_REFS][2];
376 uint8_t no_output_of_prior_pics_flag;
377 uint8_t long_term_reference_flag;
379 uint8_t adaptive_ref_pic_marking_mode_flag;
381 uint8_t memory_management_control_operation;
382 int32_t difference_of_pic_nums_minus1;
383 uint8_t long_term_pic_num;
384 uint8_t long_term_frame_idx;
385 uint8_t max_long_term_frame_idx_plus1;
386 } mmco[H264_MAX_MMCO_COUNT];
388 uint8_t cabac_init_idc;
390 int8_t slice_qp_delta;
392 uint8_t sp_for_switch_flag;
393 int8_t slice_qs_delta;
395 uint8_t disable_deblocking_filter_idc;
396 int8_t slice_alpha_c0_offset_div2;
397 int8_t slice_beta_offset_div2;
399 uint16_t slice_group_change_cycle;
400 } H264RawSliceHeader;
402 typedef struct H264RawSlice {
403 H264RawSliceHeader header;
408 AVBufferRef *data_ref;
411 typedef struct H264RawFiller {
412 H264RawNALUnitHeader nal_unit_header;
414 uint32_t filler_size;
418 typedef struct CodedBitstreamH264Context {
419 // Reader/writer context in common with the H.265 implementation.
420 CodedBitstreamH2645Context common;
422 // All currently available parameter sets. These are updated when
423 // any parameter set NAL unit is read/written with this context.
424 H264RawSPS *sps[H264_MAX_SPS_COUNT];
425 H264RawPPS *pps[H264_MAX_PPS_COUNT];
427 // The currently active parameter sets. These are updated when any
428 // NAL unit refers to the relevant parameter set. These pointers
429 // must also be present in the arrays above.
430 const H264RawSPS *active_sps;
431 const H264RawPPS *active_pps;
433 // The NAL unit type of the most recent normal slice. This is required
434 // to be able to read/write auxiliary slices, because IdrPicFlag is
435 // otherwise unknown.
436 uint8_t last_slice_nal_unit_type;
437 } CodedBitstreamH264Context;
441 * Add an SEI message to an access unit.
443 int ff_cbs_h264_add_sei_message(CodedBitstreamContext *ctx,
444 CodedBitstreamFragment *access_unit,
445 const H264RawSEIPayload *payload);
448 * Delete an SEI message from an access unit.
450 * Deletes from nal_unit, which must be an SEI NAL unit. If this is the
451 * last message in nal_unit, also deletes it from access_unit.
453 int ff_cbs_h264_delete_sei_message(CodedBitstreamContext *ctx,
454 CodedBitstreamFragment *access_unit,
455 CodedBitstreamUnit *nal_unit,
458 #endif /* AVCODEC_CBS_H264_H */