FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavformat/iamf_reader.c
Date: 2024-05-04 02:01:39
Exec Total Coverage
Lines: 137 206 66.5%
Functions: 5 5 100.0%
Branches: 66 116 56.9%
Line Branch Exec Source
1 /*
2 * Immersive Audio Model and Formats demuxing utils
3 * Copyright (c) 2024 James Almer <jamrial@gmail.com>
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
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 *
12 * FFmpeg is distributed in the hope that it will be useful,
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
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "libavutil/avassert.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/log.h"
25 #include "libavutil/mem.h"
26 #include "libavcodec/mathops.h"
27 #include "libavcodec/packet.h"
28 #include "avformat.h"
29 #include "avio_internal.h"
30 #include "iamf.h"
31 #include "iamf_parse.h"
32 #include "iamf_reader.h"
33
34 504 static AVStream *find_stream_by_id(AVFormatContext *s, int id)
35 {
36
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 1573 for (int i = 0; i < s->nb_streams; i++)
37
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 1573 if (s->streams[i]->id == id)
38 504 return s->streams[i];
39
40 ✗ av_log(s, AV_LOG_ERROR, "Invalid stream id %d\n", id);
41 ✗ return NULL;
42 }
43
44 504 static int audio_frame_obu(AVFormatContext *s, const IAMFDemuxContext *c,
45 AVIOContext *pb, AVPacket *pkt,
46 int len, enum IAMF_OBU_Type type,
47 unsigned skip_samples, unsigned discard_padding,
48 int id_in_bitstream)
49 {
50 AVStream *st;
51 int ret, audio_substream_id;
52
53
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 504 if (id_in_bitstream) {
54 unsigned explicit_audio_substream_id;
55 ✗ int64_t pos = avio_tell(pb);
56 ✗ explicit_audio_substream_id = ffio_read_leb(pb);
57 ✗ len -= avio_tell(pb) - pos;
58 ✗ audio_substream_id = explicit_audio_substream_id;
59 } else
60 504 audio_substream_id = type - IAMF_OBU_IA_AUDIO_FRAME_ID0;
61
62 504 st = find_stream_by_id(s, audio_substream_id);
63
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 504 if (!st)
64 ✗ return AVERROR_INVALIDDATA;
65
66 504 ret = av_get_packet(pb, pkt, len);
67
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 504 if (ret < 0)
68 ✗ return ret;
69
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 504 if (ret != len)
70 ✗ return AVERROR_INVALIDDATA;
71
72
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 504 if (skip_samples || discard_padding) {
73 16 uint8_t *side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_SKIP_SAMPLES, 10);
74
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 16 if (!side_data)
75 ✗ return AVERROR(ENOMEM);
76 16 AV_WL32(side_data, skip_samples);
77 16 AV_WL32(side_data + 4, discard_padding);
78 }
79
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 504 if (c->mix) {
80 126 uint8_t *side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_IAMF_MIX_GAIN_PARAM, c->mix_size);
81
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 126 if (!side_data)
82 ✗ return AVERROR(ENOMEM);
83 126 memcpy(side_data, c->mix, c->mix_size);
84 }
85
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 504 if (c->demix) {
86 ✗ uint8_t *side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_IAMF_DEMIXING_INFO_PARAM, c->demix_size);
87 ✗ if (!side_data)
88 ✗ return AVERROR(ENOMEM);
89 ✗ memcpy(side_data, c->demix, c->demix_size);
90 }
91
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 504 if (c->recon) {
92 126 uint8_t *side_data = av_packet_new_side_data(pkt, AV_PKT_DATA_IAMF_RECON_GAIN_INFO_PARAM, c->recon_size);
93
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 126 if (!side_data)
94 ✗ return AVERROR(ENOMEM);
95 126 memcpy(side_data, c->recon, c->recon_size);
96 }
97
98 504 pkt->stream_index = st->index;
99 504 return 0;
100 }
101
102 64 static int parameter_block_obu(AVFormatContext *s, IAMFDemuxContext *c,
103 AVIOContext *pbc, int len)
104 {
105 const IAMFParamDefinition *param_definition;
106 const AVIAMFParamDefinition *param;
107 64 AVIAMFParamDefinition *out_param = NULL;
108 FFIOContext b;
109 AVIOContext *pb;
110 uint8_t *buf;
111 unsigned int duration, constant_subblock_duration;
112 unsigned int nb_subblocks;
113 unsigned int parameter_id;
114 size_t out_param_size;
115 int ret;
116
117 64 buf = av_malloc(len);
118
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 64 if (!buf)
119 ✗ return AVERROR(ENOMEM);
120
121 64 ret = avio_read(pbc, buf, len);
122
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 64 if (ret != len) {
123 ✗ if (ret >= 0)
124 ✗ ret = AVERROR_INVALIDDATA;
125 ✗ goto fail;
126 }
127
128 64 ffio_init_context(&b, buf, len, 0, NULL, NULL, NULL, NULL);
129 64 pb = &b.pub;
130
131 64 parameter_id = ffio_read_leb(pb);
132 64 param_definition = ff_iamf_get_param_definition(&c->iamf, parameter_id);
133
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 64 if (!param_definition) {
134 ✗ av_log(s, AV_LOG_VERBOSE, "Non existant parameter_id %d referenced in a parameter block. Ignoring\n",
135 parameter_id);
136 ✗ ret = 0;
137 ✗ goto fail;
138 }
139
140 64 param = param_definition->param;
141
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 64 if (!param_definition->mode) {
142 32 duration = ffio_read_leb(pb);
143
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 32 if (!duration) {
144 ✗ ret = AVERROR_INVALIDDATA;
145 ✗ goto fail;
146 }
147 32 constant_subblock_duration = ffio_read_leb(pb);
148
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 32 if (constant_subblock_duration == 0)
149 ✗ nb_subblocks = ffio_read_leb(pb);
150 else
151 32 nb_subblocks = duration / constant_subblock_duration;
152 } else {
153 32 duration = param->duration;
154 32 constant_subblock_duration = param->constant_subblock_duration;
155 32 nb_subblocks = param->nb_subblocks;
156 }
157
158 64 out_param = av_iamf_param_definition_alloc(param->type, nb_subblocks, &out_param_size);
159
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 64 if (!out_param) {
160 ✗ ret = AVERROR(ENOMEM);
161 ✗ goto fail;
162 }
163
164 64 out_param->parameter_id = param->parameter_id;
165 64 out_param->type = param->type;
166 64 out_param->parameter_rate = param->parameter_rate;
167 64 out_param->duration = duration;
168 64 out_param->constant_subblock_duration = constant_subblock_duration;
169 64 out_param->nb_subblocks = nb_subblocks;
170
171
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 128 for (int i = 0; i < nb_subblocks; i++) {
172 64 void *subblock = av_iamf_param_definition_get_subblock(out_param, i);
173 64 unsigned int subblock_duration = constant_subblock_duration;
174
175
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 64 if (!param_definition->mode && !constant_subblock_duration)
176 ✗ subblock_duration = ffio_read_leb(pb);
177
178
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 64 switch (param->type) {
179 32 case AV_IAMF_PARAMETER_DEFINITION_MIX_GAIN: {
180 32 AVIAMFMixGain *mix = subblock;
181
182 32 mix->animation_type = ffio_read_leb(pb);
183
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 32 if (mix->animation_type > AV_IAMF_ANIMATION_TYPE_BEZIER) {
184 ✗ ret = 0;
185 ✗ av_free(out_param);
186 ✗ goto fail;
187 }
188
189 32 mix->start_point_value = av_make_q(sign_extend(avio_rb16(pb), 16), 1 << 8);
190
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 32 if (mix->animation_type >= AV_IAMF_ANIMATION_TYPE_LINEAR)
191 ✗ mix->end_point_value = av_make_q(sign_extend(avio_rb16(pb), 16), 1 << 8);
192
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 32 if (mix->animation_type == AV_IAMF_ANIMATION_TYPE_BEZIER) {
193 ✗ mix->control_point_value = av_make_q(sign_extend(avio_rb16(pb), 16), 1 << 8);
194 ✗ mix->control_point_relative_time = av_make_q(avio_r8(pb), 1 << 8);
195 }
196 32 mix->subblock_duration = subblock_duration;
197 32 break;
198 }
199 ✗ case AV_IAMF_PARAMETER_DEFINITION_DEMIXING: {
200 ✗ AVIAMFDemixingInfo *demix = subblock;
201
202 ✗ demix->dmixp_mode = avio_r8(pb) >> 5;
203 ✗ demix->subblock_duration = subblock_duration;
204 ✗ break;
205 }
206 32 case AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN: {
207 32 AVIAMFReconGain *recon = subblock;
208 32 const IAMFAudioElement *audio_element = param_definition->audio_element;
209 32 const AVIAMFAudioElement *element = audio_element->celement;
210
211
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 32 av_assert0(audio_element && element);
212
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 96 for (int i = 0; i < element->nb_layers; i++) {
213 64 const AVIAMFLayer *layer = element->layers[i];
214
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 64 if (layer->flags & AV_IAMF_LAYER_FLAG_RECON_GAIN) {
215 32 unsigned int recon_gain_flags = ffio_read_leb(pb);
216
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 32 unsigned int bitcount = 7 + 5 * !!(recon_gain_flags & 0x80);
217 32 recon_gain_flags = (recon_gain_flags & 0x7F) | ((recon_gain_flags & 0xFF00) >> 1);
218
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 256 for (int j = 0; j < bitcount; j++) {
219
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 224 if (recon_gain_flags & (1 << j))
220 128 recon->recon_gain[i][j] = avio_r8(pb);
221 }
222 }
223 }
224 32 recon->subblock_duration = subblock_duration;
225 32 break;
226 }
227 ✗ default:
228 ✗ av_assert0(0);
229 }
230 }
231
232 64 len -= avio_tell(pb);
233
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 64 if (len) {
234 ✗ int level = (s->error_recognition & AV_EF_EXPLODE) ? AV_LOG_ERROR : AV_LOG_WARNING;
235 ✗ av_log(s, level, "Underread in parameter_block_obu. %d bytes left at the end\n", len);
236 }
237
238
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 64 switch (param->type) {
239 32 case AV_IAMF_PARAMETER_DEFINITION_MIX_GAIN:
240 32 av_free(c->mix);
241 32 c->mix = out_param;
242 32 c->mix_size = out_param_size;
243 32 break;
244 ✗ case AV_IAMF_PARAMETER_DEFINITION_DEMIXING:
245 ✗ av_free(c->demix);
246 ✗ c->demix = out_param;
247 ✗ c->demix_size = out_param_size;
248 ✗ break;
249 32 case AV_IAMF_PARAMETER_DEFINITION_RECON_GAIN:
250 32 av_free(c->recon);
251 32 c->recon = out_param;
252 32 c->recon_size = out_param_size;
253 32 break;
254 ✗ default:
255 ✗ av_assert0(0);
256 }
257
258 64 ret = 0;
259 64 fail:
260
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 64 if (ret < 0)
261 ✗ av_free(out_param);
262 64 av_free(buf);
263
264 64 return ret;
265 }
266
267 509 int ff_iamf_read_packet(AVFormatContext *s, IAMFDemuxContext *c,
268 AVIOContext *pb, int max_size, AVPacket *pkt)
269 {
270 509 int read = 0;
271
272 64 while (1) {
273 uint8_t header[MAX_IAMF_OBU_HEADER_SIZE + AV_INPUT_BUFFER_PADDING_SIZE];
274 enum IAMF_OBU_Type type;
275 unsigned obu_size;
276 unsigned skip_samples, discard_padding;
277 int ret, len, size, start_pos;
278
279
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 573 if ((ret = ffio_ensure_seekback(pb, FFMIN(MAX_IAMF_OBU_HEADER_SIZE, max_size))) < 0)
280 509 return ret;
281 573 size = avio_read(pb, header, FFMIN(MAX_IAMF_OBU_HEADER_SIZE, max_size));
282
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 573 if (size < 0)
283 5 return size;
284
285 568 len = ff_iamf_parse_obu_header(header, size, &obu_size, &start_pos, &type,
286 &skip_samples, &discard_padding);
287
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 568 if (len < 0 || obu_size > max_size || len > INT_MAX - read) {
288 ✗ av_log(s, AV_LOG_ERROR, "Failed to read obu\n");
289 ✗ return len < 0 ? len : AVERROR_INVALIDDATA;
290 }
291 568 avio_seek(pb, -(size - start_pos), SEEK_CUR);
292
293 568 read += len;
294
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 568 if (type >= IAMF_OBU_IA_AUDIO_FRAME && type <= IAMF_OBU_IA_AUDIO_FRAME_ID17) {
295 504 ret = audio_frame_obu(s, c, pb, pkt, obu_size, type,
296 skip_samples, discard_padding,
297 type == IAMF_OBU_IA_AUDIO_FRAME);
298
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 504 if (ret < 0)
299 ✗ return ret;
300 504 return read;
301
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 64 } else if (type == IAMF_OBU_IA_PARAMETER_BLOCK) {
302 64 ret = parameter_block_obu(s, c, pb, obu_size);
303
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 64 if (ret < 0)
304 ✗ return ret;
305 ✗ } else if (type == IAMF_OBU_IA_TEMPORAL_DELIMITER) {
306 ✗ av_freep(&c->mix);
307 ✗ c->mix_size = 0;
308 ✗ av_freep(&c->demix);
309 ✗ c->demix_size = 0;
310 ✗ av_freep(&c->recon);
311 ✗ c->recon_size = 0;
312 } else {
313 ✗ int64_t offset = avio_skip(pb, obu_size);
314 ✗ if (offset < 0)
315 ✗ return offset;
316 }
317 64 max_size -= len;
318
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 64 if (max_size < 0)
319 ✗ return AVERROR_INVALIDDATA;
320
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 64 if (!max_size)
321 ✗ break;
322 }
323
324 ✗ return read;
325 }
326
327 21 void ff_iamf_read_deinit(IAMFDemuxContext *c)
328 {
329 21 IAMFContext *const iamf = &c->iamf;
330
331 21 ff_iamf_uninit_context(iamf);
332
333 21 av_freep(&c->mix);
334 21 c->mix_size = 0;
335 21 av_freep(&c->demix);
336 21 c->demix_size = 0;
337 21 av_freep(&c->recon);
338 21 c->recon_size = 0;
339 21 }
340