2 * HEVC Supplementary Enhancement Information messages
4 * Copyright (C) 2012 - 2013 Guillaume Martres
5 * Copyright (C) 2012 - 2013 Gildas Cocherel
6 * Copyright (C) 2013 Vittorio Giovara
8 * This file is part of FFmpeg.
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
29 static int decode_nal_sei_decoded_picture_hash(HEVCSEIPictureHash *s, GetBitContext *gb)
33 //uint16_t picture_crc;
34 //uint32_t picture_checksum;
35 hash_type = get_bits(gb, 8);
37 for (cIdx = 0; cIdx < 3/*((s->sps->chroma_format_idc == 0) ? 1 : 3)*/; cIdx++) {
40 for (i = 0; i < 16; i++)
41 s->md5[cIdx][i] = get_bits(gb, 8);
42 } else if (hash_type == 1) {
43 // picture_crc = get_bits(gb, 16);
45 } else if (hash_type == 2) {
46 // picture_checksum = get_bits_long(gb, 32);
53 static int decode_nal_sei_mastering_display_info(HEVCSEIMasteringDisplay *s, GetBitContext *gb)
56 // Mastering primaries
57 for (i = 0; i < 3; i++) {
58 s->display_primaries[i][0] = get_bits(gb, 16);
59 s->display_primaries[i][1] = get_bits(gb, 16);
62 s->white_point[0] = get_bits(gb, 16);
63 s->white_point[1] = get_bits(gb, 16);
65 // Max and min luminance of mastering display
66 s->max_luminance = get_bits_long(gb, 32);
67 s->min_luminance = get_bits_long(gb, 32);
69 // As this SEI message comes before the first frame that references it,
70 // initialize the flag to 2 and decrement on IRAP access unit so it
71 // persists for the coded video sequence (e.g., between two IRAPs)
76 static int decode_nal_sei_content_light_info(HEVCSEIContentLight *s, GetBitContext *gb)
78 // Max and average light levels
79 s->max_content_light_level = get_bits_long(gb, 16);
80 s->max_pic_average_light_level = get_bits_long(gb, 16);
81 // As this SEI message comes before the first frame that references it,
82 // initialize the flag to 2 and decrement on IRAP access unit so it
83 // persists for the coded video sequence (e.g., between two IRAPs)
88 static int decode_nal_sei_frame_packing_arrangement(HEVCSEIFramePacking *s, GetBitContext *gb)
90 get_ue_golomb_long(gb); // frame_packing_arrangement_id
91 s->present = !get_bits1(gb);
94 s->arrangement_type = get_bits(gb, 7);
95 s->quincunx_subsampling = get_bits1(gb);
96 s->content_interpretation_type = get_bits(gb, 6);
98 // the following skips spatial_flipping_flag frame0_flipped_flag
99 // field_views_flag current_frame_is_frame0_flag
100 // frame0_self_contained_flag frame1_self_contained_flag
103 if (!s->quincunx_subsampling && s->arrangement_type != 5)
104 skip_bits(gb, 16); // frame[01]_grid_position_[xy]
105 skip_bits(gb, 8); // frame_packing_arrangement_reserved_byte
106 skip_bits1(gb); // frame_packing_arrangement_persistence_flag
108 skip_bits1(gb); // upsampled_aspect_ratio_flag
112 static int decode_nal_sei_display_orientation(HEVCSEIDisplayOrientation *s, GetBitContext *gb)
114 s->present = !get_bits1(gb);
117 s->hflip = get_bits1(gb); // hor_flip
118 s->vflip = get_bits1(gb); // ver_flip
120 s->anticlockwise_rotation = get_bits(gb, 16);
121 skip_bits1(gb); // display_orientation_persistence_flag
127 static int decode_nal_sei_pic_timing(HEVCSEI *s, GetBitContext *gb, const HEVCParamSets *ps,
128 void *logctx, int size)
130 HEVCSEIPictureTiming *h = &s->picture_timing;
133 if (!ps->sps_list[s->active_seq_parameter_set_id])
134 return(AVERROR(ENOMEM));
135 sps = (HEVCSPS*)ps->sps_list[s->active_seq_parameter_set_id]->data;
137 if (sps->vui.frame_field_info_present_flag) {
138 int pic_struct = get_bits(gb, 4);
139 h->picture_struct = AV_PICTURE_STRUCTURE_UNKNOWN;
140 if (pic_struct == 2 || pic_struct == 10 || pic_struct == 12) {
141 av_log(logctx, AV_LOG_DEBUG, "BOTTOM Field\n");
142 h->picture_struct = AV_PICTURE_STRUCTURE_BOTTOM_FIELD;
143 } else if (pic_struct == 1 || pic_struct == 9 || pic_struct == 11) {
144 av_log(logctx, AV_LOG_DEBUG, "TOP Field\n");
145 h->picture_struct = AV_PICTURE_STRUCTURE_TOP_FIELD;
147 get_bits(gb, 2); // source_scan_type
148 get_bits(gb, 1); // duplicate_flag
152 skip_bits_long(gb, 8 * size);
157 static int decode_registered_user_data_closed_caption(HEVCSEIA53Caption *s, GetBitContext *gb,
161 int user_data_type_code;
165 return AVERROR(EINVAL);
167 user_data_type_code = get_bits(gb, 8);
168 if (user_data_type_code == 0x3) {
169 skip_bits(gb, 1); // reserved
171 flag = get_bits(gb, 1); // process_cc_data_flag
174 cc_count = get_bits(gb, 5);
175 skip_bits(gb, 8); // reserved
178 if (cc_count && size >= cc_count * 3) {
179 const uint64_t new_size = (s->a53_caption_size + cc_count
183 if (new_size > INT_MAX)
184 return AVERROR(EINVAL);
186 /* Allow merging of the cc data from two fields. */
187 ret = av_reallocp(&s->a53_caption, new_size);
191 for (i = 0; i < cc_count; i++) {
192 s->a53_caption[s->a53_caption_size++] = get_bits(gb, 8);
193 s->a53_caption[s->a53_caption_size++] = get_bits(gb, 8);
194 s->a53_caption[s->a53_caption_size++] = get_bits(gb, 8);
196 skip_bits(gb, 8); // marker_bits
201 for (i = 0; i < size - 1; i++)
208 static int decode_nal_sei_user_data_registered_itu_t_t35(HEVCSEI *s, GetBitContext *gb,
211 uint32_t country_code;
212 uint32_t user_identifier;
215 return AVERROR(EINVAL);
218 country_code = get_bits(gb, 8);
219 if (country_code == 0xFF) {
227 user_identifier = get_bits_long(gb, 32);
229 switch (user_identifier) {
230 case MKBETAG('G', 'A', '9', '4'):
231 return decode_registered_user_data_closed_caption(&s->a53_caption, gb, size);
233 skip_bits_long(gb, size * 8);
239 static int decode_nal_sei_active_parameter_sets(HEVCSEI *s, GetBitContext *gb, void *logctx)
241 int num_sps_ids_minus1;
243 unsigned active_seq_parameter_set_id;
245 get_bits(gb, 4); // active_video_parameter_set_id
246 get_bits(gb, 1); // self_contained_cvs_flag
247 get_bits(gb, 1); // num_sps_ids_minus1
248 num_sps_ids_minus1 = get_ue_golomb_long(gb); // num_sps_ids_minus1
250 if (num_sps_ids_minus1 < 0 || num_sps_ids_minus1 > 15) {
251 av_log(logctx, AV_LOG_ERROR, "num_sps_ids_minus1 %d invalid\n", num_sps_ids_minus1);
252 return AVERROR_INVALIDDATA;
255 active_seq_parameter_set_id = get_ue_golomb_long(gb);
256 if (active_seq_parameter_set_id >= HEVC_MAX_SPS_COUNT) {
257 av_log(logctx, AV_LOG_ERROR, "active_parameter_set_id %d invalid\n", active_seq_parameter_set_id);
258 return AVERROR_INVALIDDATA;
260 s->active_seq_parameter_set_id = active_seq_parameter_set_id;
262 for (i = 1; i <= num_sps_ids_minus1; i++)
263 get_ue_golomb_long(gb); // active_seq_parameter_set_id[i]
268 static int decode_nal_sei_alternative_transfer(HEVCSEIAlternativeTransfer *s, GetBitContext *gb)
271 s->preferred_transfer_characteristics = get_bits(gb, 8);
275 static int decode_nal_sei_prefix(GetBitContext *gb, void *logctx, HEVCSEI *s,
276 const HEVCParamSets *ps, int type, int size)
279 case 256: // Mismatched value from HM 8.1
280 return decode_nal_sei_decoded_picture_hash(&s->picture_hash, gb);
281 case HEVC_SEI_TYPE_FRAME_PACKING:
282 return decode_nal_sei_frame_packing_arrangement(&s->frame_packing, gb);
283 case HEVC_SEI_TYPE_DISPLAY_ORIENTATION:
284 return decode_nal_sei_display_orientation(&s->display_orientation, gb);
285 case HEVC_SEI_TYPE_PICTURE_TIMING:
286 return decode_nal_sei_pic_timing(s, gb, ps, logctx, size);
287 case HEVC_SEI_TYPE_MASTERING_DISPLAY_INFO:
288 return decode_nal_sei_mastering_display_info(&s->mastering_display, gb);
289 case HEVC_SEI_TYPE_CONTENT_LIGHT_LEVEL_INFO:
290 return decode_nal_sei_content_light_info(&s->content_light, gb);
291 case HEVC_SEI_TYPE_ACTIVE_PARAMETER_SETS:
292 return decode_nal_sei_active_parameter_sets(s, gb, logctx);
293 case HEVC_SEI_TYPE_USER_DATA_REGISTERED_ITU_T_T35:
294 return decode_nal_sei_user_data_registered_itu_t_t35(s, gb, size);
295 case HEVC_SEI_TYPE_ALTERNATIVE_TRANSFER_CHARACTERISTICS:
296 return decode_nal_sei_alternative_transfer(&s->alternative_transfer, gb);
298 av_log(logctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", type);
299 skip_bits_long(gb, 8 * size);
304 static int decode_nal_sei_suffix(GetBitContext *gb, void *logctx, HEVCSEI *s,
308 case HEVC_SEI_TYPE_DECODED_PICTURE_HASH:
309 return decode_nal_sei_decoded_picture_hash(&s->picture_hash, gb);
311 av_log(logctx, AV_LOG_DEBUG, "Skipped SUFFIX SEI %d\n", type);
312 skip_bits_long(gb, 8 * size);
317 static int decode_nal_sei_message(GetBitContext *gb, void *logctx, HEVCSEI *s,
318 const HEVCParamSets *ps, int nal_unit_type)
320 int payload_type = 0;
321 int payload_size = 0;
323 av_log(logctx, AV_LOG_DEBUG, "Decoding SEI\n");
325 while (byte == 0xFF) {
326 byte = get_bits(gb, 8);
327 payload_type += byte;
330 while (byte == 0xFF) {
331 byte = get_bits(gb, 8);
332 payload_size += byte;
334 if (nal_unit_type == HEVC_NAL_SEI_PREFIX) {
335 return decode_nal_sei_prefix(gb, logctx, s, ps, payload_type, payload_size);
336 } else { /* nal_unit_type == NAL_SEI_SUFFIX */
337 return decode_nal_sei_suffix(gb, logctx, s, payload_type, payload_size);
341 static int more_rbsp_data(GetBitContext *gb)
343 return get_bits_left(gb) > 0 && show_bits(gb, 8) != 0x80;
346 int ff_hevc_decode_nal_sei(GetBitContext *gb, void *logctx, HEVCSEI *s,
347 const HEVCParamSets *ps, int type)
352 ret = decode_nal_sei_message(gb, logctx, s, ps, type);
355 } while (more_rbsp_data(gb));
359 void ff_hevc_reset_sei(HEVCSEI *s)
361 s->a53_caption.a53_caption_size = 0;
362 av_freep(&s->a53_caption.a53_caption);