checkasm: Add unit tests for h264qpel
[libav.git] / libavcodec / h264_sei.c
CommitLineData
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1/*
2 * H.26L/H.264/AVC/JVT/14496-10/... sei decoding
3 * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4 *
2912e87a 5 * This file is part of Libav.
9c095463 6 *
2912e87a 7 * Libav is free software; you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
2912e87a 12 * Libav is distributed in the hope that it will be useful,
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
2912e87a 18 * License along with Libav; if not, write to the Free Software
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19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22/**
ba87f080 23 * @file
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24 * H.264 / AVC / MPEG4 part10 sei decoding.
25 * @author Michael Niedermayer <michaelni@gmx.at>
26 */
27
9c095463 28#include "avcodec.h"
9c095463 29#include "golomb.h"
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30#include "h264.h"
31#include "internal.h"
9c095463 32
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33static const uint8_t sei_num_clock_ts_table[9] = {
34 1, 1, 1, 2, 2, 3, 3, 2, 3
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35};
36
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37void ff_h264_reset_sei(H264Context *h)
38{
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39 h->sei_recovery_frame_cnt = -1;
40 h->sei_dpb_output_delay = 0;
41 h->sei_cpb_removal_delay = -1;
42 h->sei_buffering_period_present = 0;
5b10ef72 43 h->sei_frame_packing_present = 0;
18e3d61e 44 h->sei_display_orientation_present = 0;
271ce76d 45 h->sei_reguserdata_afd_present = 0;
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46}
47
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48static int decode_picture_timing(H264Context *h)
49{
50 if (h->sps.nal_hrd_parameters_present_flag ||
51 h->sps.vcl_hrd_parameters_present_flag) {
52 h->sei_cpb_removal_delay = get_bits(&h->gb,
53 h->sps.cpb_removal_delay_length);
54 h->sei_dpb_output_delay = get_bits(&h->gb,
55 h->sps.dpb_output_delay_length);
9c095463 56 }
b1841217 57 if (h->sps.pic_struct_present_flag) {
9c095463 58 unsigned int i, num_clock_ts;
b1841217 59
2c541554 60 h->sei_pic_struct = get_bits(&h->gb, 4);
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61 h->sei_ct_type = 0;
62
63 if (h->sei_pic_struct > SEI_PIC_STRUCT_FRAME_TRIPLING)
0d8b943d 64 return AVERROR_INVALIDDATA;
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65
66 num_clock_ts = sei_num_clock_ts_table[h->sei_pic_struct];
67
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68 for (i = 0; i < num_clock_ts; i++) {
69 if (get_bits(&h->gb, 1)) { /* clock_timestamp_flag */
9c095463 70 unsigned int full_timestamp_flag;
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71
72 h->sei_ct_type |= 1 << get_bits(&h->gb, 2);
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73 skip_bits(&h->gb, 1); /* nuit_field_based_flag */
74 skip_bits(&h->gb, 5); /* counting_type */
75 full_timestamp_flag = get_bits(&h->gb, 1);
76 skip_bits(&h->gb, 1); /* discontinuity_flag */
77 skip_bits(&h->gb, 1); /* cnt_dropped_flag */
78 skip_bits(&h->gb, 8); /* n_frames */
b1841217 79 if (full_timestamp_flag) {
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80 skip_bits(&h->gb, 6); /* seconds_value 0..59 */
81 skip_bits(&h->gb, 6); /* minutes_value 0..59 */
82 skip_bits(&h->gb, 5); /* hours_value 0..23 */
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83 } else {
84 if (get_bits(&h->gb, 1)) { /* seconds_flag */
2c541554 85 skip_bits(&h->gb, 6); /* seconds_value range 0..59 */
b1841217 86 if (get_bits(&h->gb, 1)) { /* minutes_flag */
2c541554 87 skip_bits(&h->gb, 6); /* minutes_value 0..59 */
b1841217 88 if (get_bits(&h->gb, 1)) /* hours_flag */
2c541554 89 skip_bits(&h->gb, 5); /* hours_value 0..23 */
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90 }
91 }
92 }
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93 if (h->sps.time_offset_length > 0)
94 skip_bits(&h->gb,
95 h->sps.time_offset_length); /* time_offset */
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96 }
97 }
98
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99 if (h->avctx->debug & FF_DEBUG_PICT_INFO)
100 av_log(h->avctx, AV_LOG_DEBUG, "ct_type:%X pic_struct:%d\n",
101 h->sei_ct_type, h->sei_pic_struct);
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102 }
103 return 0;
104}
105
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106static int decode_registered_user_data(H264Context *h, int size)
107{
108 uint32_t country_code;
109 uint32_t user_identifier;
110 int flag;
111
112 if (size < 7)
113 return AVERROR_INVALIDDATA;
114 size -= 7;
115
116 country_code = get_bits(&h->gb, 8); // itu_t_t35_country_code
117 if (country_code == 0xFF) {
118 skip_bits(&h->gb, 8); // itu_t_t35_country_code_extension_byte
119 size--;
120 }
121
122 /* itu_t_t35_payload_byte follows */
123 skip_bits(&h->gb, 8); // terminal provider code
124 skip_bits(&h->gb, 8); // terminal provider oriented code
125 user_identifier = get_bits_long(&h->gb, 32);
126
127 switch (user_identifier) {
128 case MKBETAG('D', 'T', 'G', '1'): // afd_data
129 if (size-- < 1)
130 return AVERROR_INVALIDDATA;
131 skip_bits(&h->gb, 1); // 0
132 flag = get_bits(&h->gb, 1); // active_format_flag
133 skip_bits(&h->gb, 6); // reserved
134
135 if (flag) {
136 if (size-- < 1)
137 return AVERROR_INVALIDDATA;
138 skip_bits(&h->gb, 4); // reserved
139 h->active_format_description = get_bits(&h->gb, 4);
140 h->sei_reguserdata_afd_present = 1;
141 }
142 break;
143 default:
144 skip_bits(&h->gb, size * 8);
145 break;
146 }
147
148 return 0;
149}
150
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151static int decode_unregistered_user_data(H264Context *h, int size)
152{
153 uint8_t user_data[16 + 256];
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154 int e, build, i;
155
b1841217 156 if (size < 16)
0d8b943d 157 return AVERROR_INVALIDDATA;
9c095463 158
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159 for (i = 0; i < sizeof(user_data) - 1 && i < size; i++)
160 user_data[i] = get_bits(&h->gb, 8);
9c095463 161
b1841217 162 user_data[i] = 0;
4c7fd58f 163 e = sscanf(user_data + 16, "x264 - core %d", &build);
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164 if (e == 1 && build > 0)
165 h->x264_build = build;
9c095463 166
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167 if (h->avctx->debug & FF_DEBUG_BUGS)
168 av_log(h->avctx, AV_LOG_DEBUG, "user data:\"%s\"\n", user_data + 16);
9c095463 169
b1841217 170 for (; i < size; i++)
2c541554 171 skip_bits(&h->gb, 8);
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172
173 return 0;
174}
175
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176static int decode_recovery_point(H264Context *h)
177{
2c541554 178 h->sei_recovery_frame_cnt = get_ue_golomb(&h->gb);
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179
180 /* 1b exact_match_flag,
181 * 1b broken_link_flag,
182 * 2b changing_slice_group_idc */
183 skip_bits(&h->gb, 4);
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184
185 return 0;
186}
187
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188static int decode_buffering_period(H264Context *h)
189{
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190 unsigned int sps_id;
191 int sched_sel_idx;
192 SPS *sps;
193
2c541554 194 sps_id = get_ue_golomb_31(&h->gb);
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195 if (sps_id > 31 || !h->sps_buffers[sps_id]) {
196 av_log(h->avctx, AV_LOG_ERROR,
197 "non-existing SPS %d referenced in buffering period\n", sps_id);
0d8b943d 198 return AVERROR_INVALIDDATA;
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199 }
200 sps = h->sps_buffers[sps_id];
201
202 // NOTE: This is really so duplicated in the standard... See H.264, D.1.1
203 if (sps->nal_hrd_parameters_present_flag) {
204 for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
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205 h->initial_cpb_removal_delay[sched_sel_idx] =
206 get_bits(&h->gb, sps->initial_cpb_removal_delay_length);
207 // initial_cpb_removal_delay_offset
208 skip_bits(&h->gb, sps->initial_cpb_removal_delay_length);
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209 }
210 }
211 if (sps->vcl_hrd_parameters_present_flag) {
212 for (sched_sel_idx = 0; sched_sel_idx < sps->cpb_cnt; sched_sel_idx++) {
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213 h->initial_cpb_removal_delay[sched_sel_idx] =
214 get_bits(&h->gb, sps->initial_cpb_removal_delay_length);
215 // initial_cpb_removal_delay_offset
216 skip_bits(&h->gb, sps->initial_cpb_removal_delay_length);
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217 }
218 }
219
220 h->sei_buffering_period_present = 1;
221 return 0;
222}
223
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224static int decode_frame_packing_arrangement(H264Context *h)
225{
5b10ef72 226 get_ue_golomb(&h->gb); // frame_packing_arrangement_id
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227 h->sei_frame_packing_present = !get_bits1(&h->gb);
228
229 if (h->sei_frame_packing_present) {
230 h->frame_packing_arrangement_type = get_bits(&h->gb, 7);
231 h->quincunx_subsampling = get_bits1(&h->gb);
232 h->content_interpretation_type = get_bits(&h->gb, 6);
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233
234 // the following skips: spatial_flipping_flag, frame0_flipped_flag,
235 // field_views_flag, current_frame_is_frame0_flag,
236 // frame0_self_contained_flag, frame1_self_contained_flag
237 skip_bits(&h->gb, 6);
238
3d9fc21e 239 if (!h->quincunx_subsampling && h->frame_packing_arrangement_type != 5)
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240 skip_bits(&h->gb, 16); // frame[01]_grid_position_[xy]
241 skip_bits(&h->gb, 8); // frame_packing_arrangement_reserved_byte
242 get_ue_golomb(&h->gb); // frame_packing_arrangement_repetition_period
243 }
244 skip_bits1(&h->gb); // frame_packing_arrangement_extension_flag
245
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246 return 0;
247}
248
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249static int decode_display_orientation(H264Context *h)
250{
251 h->sei_display_orientation_present = !get_bits1(&h->gb);
252
253 if (h->sei_display_orientation_present) {
254 h->sei_hflip = get_bits1(&h->gb); // hor_flip
255 h->sei_vflip = get_bits1(&h->gb); // ver_flip
256
257 h->sei_anticlockwise_rotation = get_bits(&h->gb, 16);
258 get_ue_golomb(&h->gb); // display_orientation_repetition_period
259 skip_bits1(&h->gb); // display_orientation_extension_flag
260 }
261
262 return 0;
263}
264
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265int ff_h264_decode_sei(H264Context *h)
266{
2c541554 267 while (get_bits_left(&h->gb) > 16) {
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268 int size = 0;
269 int type = 0;
0d8b943d 270 int ret = 0;
7ab551f9 271 int last = 0;
9c095463 272
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273 while (get_bits_left(&h->gb) >= 8 &&
274 (last = get_bits(&h->gb, 8)) == 255) {
275 type += 255;
276 }
277 type += last;
9c095463 278
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279 last = 0;
280 while (get_bits_left(&h->gb) >= 8 &&
281 (last = get_bits(&h->gb, 8)) == 255) {
282 size += 255;
283 }
284 size += last;
9c095463 285
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286 if (size > get_bits_left(&h->gb) / 8) {
287 av_log(h->avctx, AV_LOG_ERROR, "SEI type %d truncated at %d\n",
288 type, get_bits_left(&h->gb));
289 return AVERROR_INVALIDDATA;
290 }
291
b1841217 292 switch (type) {
9c095463 293 case SEI_TYPE_PIC_TIMING: // Picture timing SEI
0d8b943d 294 ret = decode_picture_timing(h);
9c095463 295 break;
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296 case SEI_TYPE_USER_DATA_REGISTERED:
297 ret = decode_registered_user_data(h, size);
298 break;
9c095463 299 case SEI_TYPE_USER_DATA_UNREGISTERED:
0d8b943d 300 ret = decode_unregistered_user_data(h, size);
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301 break;
302 case SEI_TYPE_RECOVERY_POINT:
0d8b943d 303 ret = decode_recovery_point(h);
9c095463 304 break;
304e916a 305 case SEI_TYPE_BUFFERING_PERIOD:
0d8b943d 306 ret = decode_buffering_period(h);
9c095463 307 break;
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308 case SEI_TYPE_FRAME_PACKING:
309 ret = decode_frame_packing_arrangement(h);
5b10ef72 310 break;
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311 case SEI_TYPE_DISPLAY_ORIENTATION:
312 ret = decode_display_orientation(h);
18e3d61e 313 break;
9c095463 314 default:
26179964 315 av_log(h->avctx, AV_LOG_DEBUG, "unknown SEI type %d\n", type);
b1841217 316 skip_bits(&h->gb, 8 * size);
9c095463 317 }
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318 if (ret < 0)
319 return ret;
9c095463 320
b1841217 321 // FIXME check bits here
2c541554 322 align_get_bits(&h->gb);
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323 }
324
325 return 0;
326}