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1 | /* | ||
2 | * HEVC Supplementary Enhancement Information messages | ||
3 | * | ||
4 | * Copyright (C) 2012 - 2013 Guillaume Martres | ||
5 | * Copyright (C) 2012 - 2013 Gildas Cocherel | ||
6 | * Copyright (C) 2013 Vittorio Giovara | ||
7 | * | ||
8 | * This file is part of FFmpeg. | ||
9 | * | ||
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. | ||
14 | * | ||
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. | ||
19 | * | ||
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 | ||
23 | */ | ||
24 | |||
25 | #include "bytestream.h" | ||
26 | #include "golomb.h" | ||
27 | #include "ps.h" | ||
28 | #include "sei.h" | ||
29 | |||
30 | 6857 | static int decode_nal_sei_decoded_picture_hash(HEVCSEIPictureHash *s, | |
31 | GetByteContext *gb) | ||
32 | { | ||
33 | int cIdx; | ||
34 | uint8_t hash_type; | ||
35 | //uint16_t picture_crc; | ||
36 | //uint32_t picture_checksum; | ||
37 | 6857 | hash_type = bytestream2_get_byte(gb); | |
38 | |||
39 |
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27428 | for (cIdx = 0; cIdx < 3/*((s->sps->chroma_format_idc == 0) ? 1 : 3)*/; cIdx++) { |
40 |
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20571 | if (hash_type == 0) { |
41 | 19521 | s->is_md5 = 1; | |
42 | 19521 | bytestream2_get_buffer(gb, s->md5[cIdx], sizeof(s->md5[cIdx])); | |
43 | } else if (hash_type == 1) { | ||
44 | // picture_crc = get_bits(gb, 16); | ||
45 | } else if (hash_type == 2) { | ||
46 | // picture_checksum = get_bits_long(gb, 32); | ||
47 | } | ||
48 | } | ||
49 | 6857 | return 0; | |
50 | } | ||
51 | |||
52 | 1373 | static int decode_nal_sei_pic_timing(HEVCSEI *s, GetBitContext *gb, | |
53 | const HEVCParamSets *ps, void *logctx) | ||
54 | { | ||
55 | 1373 | HEVCSEIPictureTiming *h = &s->picture_timing; | |
56 | 1373 | const HEVCSPS *sps = ps->sps_list[s->active_seq_parameter_set_id]; | |
57 | |||
58 |
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1373 | if (!sps) |
59 | 66 | return AVERROR_INVALIDDATA; | |
60 | |||
61 |
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1307 | if (sps->vui.frame_field_info_present_flag) { |
62 | 727 | int pic_struct = get_bits(gb, 4); | |
63 | 727 | h->picture_struct = AV_PICTURE_STRUCTURE_UNKNOWN; | |
64 |
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727 | if (pic_struct == 2 || pic_struct == 10 || pic_struct == 12) { |
65 | 10 | av_log(logctx, AV_LOG_DEBUG, "BOTTOM Field\n"); | |
66 | 10 | h->picture_struct = AV_PICTURE_STRUCTURE_BOTTOM_FIELD; | |
67 |
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717 | } else if (pic_struct == 1 || pic_struct == 9 || pic_struct == 11) { |
68 | 11 | av_log(logctx, AV_LOG_DEBUG, "TOP Field\n"); | |
69 | 11 | h->picture_struct = AV_PICTURE_STRUCTURE_TOP_FIELD; | |
70 |
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706 | } else if (pic_struct == 7) { |
71 | ✗ | av_log(logctx, AV_LOG_DEBUG, "Frame/Field Doubling\n"); | |
72 | ✗ | h->picture_struct = HEVC_SEI_PIC_STRUCT_FRAME_DOUBLING; | |
73 |
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706 | } else if (pic_struct == 8) { |
74 | ✗ | av_log(logctx, AV_LOG_DEBUG, "Frame/Field Tripling\n"); | |
75 | ✗ | h->picture_struct = HEVC_SEI_PIC_STRUCT_FRAME_TRIPLING; | |
76 | } | ||
77 | } | ||
78 | |||
79 | 1307 | return 0; | |
80 | } | ||
81 | |||
82 | 32 | static int decode_nal_sei_active_parameter_sets(HEVCSEI *s, GetBitContext *gb, void *logctx) | |
83 | { | ||
84 | int num_sps_ids_minus1; | ||
85 | unsigned active_seq_parameter_set_id; | ||
86 | |||
87 | 32 | get_bits(gb, 4); // active_video_parameter_set_id | |
88 | 32 | get_bits(gb, 1); // self_contained_cvs_flag | |
89 | 32 | get_bits(gb, 1); // num_sps_ids_minus1 | |
90 | 32 | num_sps_ids_minus1 = get_ue_golomb_long(gb); // num_sps_ids_minus1 | |
91 | |||
92 |
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32 | if (num_sps_ids_minus1 < 0 || num_sps_ids_minus1 > 15) { |
93 | ✗ | av_log(logctx, AV_LOG_ERROR, "num_sps_ids_minus1 %d invalid\n", num_sps_ids_minus1); | |
94 | ✗ | return AVERROR_INVALIDDATA; | |
95 | } | ||
96 | |||
97 | 32 | active_seq_parameter_set_id = get_ue_golomb_long(gb); | |
98 |
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32 | if (active_seq_parameter_set_id >= HEVC_MAX_SPS_COUNT) { |
99 | ✗ | av_log(logctx, AV_LOG_ERROR, "active_parameter_set_id %d invalid\n", active_seq_parameter_set_id); | |
100 | ✗ | return AVERROR_INVALIDDATA; | |
101 | } | ||
102 | 32 | s->active_seq_parameter_set_id = active_seq_parameter_set_id; | |
103 | |||
104 | 32 | return 0; | |
105 | } | ||
106 | |||
107 | 136 | static int decode_nal_sei_timecode(HEVCSEITimeCode *s, GetBitContext *gb) | |
108 | { | ||
109 | 136 | s->num_clock_ts = get_bits(gb, 2); | |
110 | |||
111 |
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272 | for (int i = 0; i < s->num_clock_ts; i++) { |
112 | 136 | s->clock_timestamp_flag[i] = get_bits(gb, 1); | |
113 | |||
114 |
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136 | if (s->clock_timestamp_flag[i]) { |
115 | ✗ | s->units_field_based_flag[i] = get_bits(gb, 1); | |
116 | ✗ | s->counting_type[i] = get_bits(gb, 5); | |
117 | ✗ | s->full_timestamp_flag[i] = get_bits(gb, 1); | |
118 | ✗ | s->discontinuity_flag[i] = get_bits(gb, 1); | |
119 | ✗ | s->cnt_dropped_flag[i] = get_bits(gb, 1); | |
120 | |||
121 | ✗ | s->n_frames[i] = get_bits(gb, 9); | |
122 | |||
123 | ✗ | if (s->full_timestamp_flag[i]) { | |
124 | ✗ | s->seconds_value[i] = av_clip(get_bits(gb, 6), 0, 59); | |
125 | ✗ | s->minutes_value[i] = av_clip(get_bits(gb, 6), 0, 59); | |
126 | ✗ | s->hours_value[i] = av_clip(get_bits(gb, 5), 0, 23); | |
127 | } else { | ||
128 | ✗ | s->seconds_flag[i] = get_bits(gb, 1); | |
129 | ✗ | if (s->seconds_flag[i]) { | |
130 | ✗ | s->seconds_value[i] = av_clip(get_bits(gb, 6), 0, 59); | |
131 | ✗ | s->minutes_flag[i] = get_bits(gb, 1); | |
132 | ✗ | if (s->minutes_flag[i]) { | |
133 | ✗ | s->minutes_value[i] = av_clip(get_bits(gb, 6), 0, 59); | |
134 | ✗ | s->hours_flag[i] = get_bits(gb, 1); | |
135 | ✗ | if (s->hours_flag[i]) { | |
136 | ✗ | s->hours_value[i] = av_clip(get_bits(gb, 5), 0, 23); | |
137 | } | ||
138 | } | ||
139 | } | ||
140 | } | ||
141 | |||
142 | ✗ | s->time_offset_length[i] = get_bits(gb, 5); | |
143 | ✗ | if (s->time_offset_length[i] > 0) { | |
144 | ✗ | s->time_offset_value[i] = get_bits_long(gb, s->time_offset_length[i]); | |
145 | } | ||
146 | } | ||
147 | } | ||
148 | |||
149 | 136 | s->present = 1; | |
150 | 136 | return 0; | |
151 | } | ||
152 | |||
153 | 1844 | static int decode_nal_sei_prefix(GetBitContext *gb, GetByteContext *gbyte, | |
154 | void *logctx, HEVCSEI *s, | ||
155 | const HEVCParamSets *ps, int type) | ||
156 | { | ||
157 |
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1844 | switch (type) { |
158 | ✗ | case 256: // Mismatched value from HM 8.1 | |
159 | ✗ | return decode_nal_sei_decoded_picture_hash(&s->picture_hash, gbyte); | |
160 | 1373 | case SEI_TYPE_PIC_TIMING: | |
161 | 1373 | return decode_nal_sei_pic_timing(s, gb, ps, logctx); | |
162 | 32 | case SEI_TYPE_ACTIVE_PARAMETER_SETS: | |
163 | 32 | return decode_nal_sei_active_parameter_sets(s, gb, logctx); | |
164 | 136 | case SEI_TYPE_TIME_CODE: | |
165 | 136 | return decode_nal_sei_timecode(&s->timecode, gb); | |
166 | 303 | default: { | |
167 | 303 | int ret = ff_h2645_sei_message_decode(&s->common, type, AV_CODEC_ID_HEVC, | |
168 | gb, gbyte, logctx); | ||
169 |
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303 | if (ret == FF_H2645_SEI_MESSAGE_UNHANDLED) |
170 | 104 | av_log(logctx, AV_LOG_DEBUG, "Skipped PREFIX SEI %d\n", type); | |
171 | 303 | return ret; | |
172 | } | ||
173 | } | ||
174 | } | ||
175 | |||
176 | 6857 | static int decode_nal_sei_suffix(GetBitContext *gb, GetByteContext *gbyte, | |
177 | void *logctx, HEVCSEI *s, int type) | ||
178 | { | ||
179 |
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6857 | switch (type) { |
180 | 6857 | case SEI_TYPE_DECODED_PICTURE_HASH: | |
181 | 6857 | return decode_nal_sei_decoded_picture_hash(&s->picture_hash, gbyte); | |
182 | ✗ | default: | |
183 | ✗ | av_log(logctx, AV_LOG_DEBUG, "Skipped SUFFIX SEI %d\n", type); | |
184 | ✗ | return 0; | |
185 | } | ||
186 | } | ||
187 | |||
188 | 8701 | static int decode_nal_sei_message(GetByteContext *gb, void *logctx, HEVCSEI *s, | |
189 | const HEVCParamSets *ps, int nal_unit_type) | ||
190 | { | ||
191 | GetByteContext message_gbyte; | ||
192 | GetBitContext message_gb; | ||
193 | 8701 | int payload_type = 0; | |
194 | 8701 | int payload_size = 0; | |
195 | 8701 | int byte = 0xFF; | |
196 | av_unused int ret; | ||
197 | 8701 | av_log(logctx, AV_LOG_DEBUG, "Decoding SEI\n"); | |
198 | |||
199 |
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17402 | while (byte == 0xFF) { |
200 |
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8701 | if (bytestream2_get_bytes_left(gb) < 2 || payload_type > INT_MAX - 255) |
201 | ✗ | return AVERROR_INVALIDDATA; | |
202 | 8701 | byte = bytestream2_get_byteu(gb); | |
203 | 8701 | payload_type += byte; | |
204 | } | ||
205 | 8701 | byte = 0xFF; | |
206 |
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17493 | while (byte == 0xFF) { |
207 |
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8792 | if (bytestream2_get_bytes_left(gb) < 1 + payload_size) |
208 | ✗ | return AVERROR_INVALIDDATA; | |
209 | 8792 | byte = bytestream2_get_byteu(gb); | |
210 | 8792 | payload_size += byte; | |
211 | } | ||
212 |
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8701 | if (bytestream2_get_bytes_left(gb) < payload_size) |
213 | ✗ | return AVERROR_INVALIDDATA; | |
214 | 8701 | bytestream2_init(&message_gbyte, gb->buffer, payload_size); | |
215 | 8701 | ret = init_get_bits8(&message_gb, gb->buffer, payload_size); | |
216 | av_assert1(ret >= 0); | ||
217 | 8701 | bytestream2_skipu(gb, payload_size); | |
218 |
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8701 | if (nal_unit_type == HEVC_NAL_SEI_PREFIX) { |
219 | 1844 | return decode_nal_sei_prefix(&message_gb, &message_gbyte, | |
220 | logctx, s, ps, payload_type); | ||
221 | } else { /* nal_unit_type == NAL_SEI_SUFFIX */ | ||
222 | 6857 | return decode_nal_sei_suffix(&message_gb, &message_gbyte, | |
223 | logctx, s, payload_type); | ||
224 | } | ||
225 | } | ||
226 | |||
227 | 8689 | int ff_hevc_decode_nal_sei(GetBitContext *gb, void *logctx, HEVCSEI *s, | |
228 | const HEVCParamSets *ps, enum HEVCNALUnitType type) | ||
229 | { | ||
230 | GetByteContext gbyte; | ||
231 | int ret; | ||
232 | |||
233 | av_assert1((get_bits_count(gb) % 8) == 0); | ||
234 | 8689 | bytestream2_init(&gbyte, gb->buffer + get_bits_count(gb) / 8, | |
235 | 8689 | get_bits_left(gb) / 8); | |
236 | |||
237 | do { | ||
238 | 8701 | ret = decode_nal_sei_message(&gbyte, logctx, s, ps, type); | |
239 |
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8701 | if (ret < 0) |
240 | 66 | return ret; | |
241 |
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8635 | } while (bytestream2_get_bytes_left(&gbyte) > 0); |
242 | 8623 | return 1; | |
243 | } | ||
244 |