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path: root/libavformat/r3d.c (plain)
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1/*
2 * R3D REDCODE demuxer
3 * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot 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/intreadwrite.h"
23#include "libavutil/dict.h"
24#include "libavutil/mathematics.h"
25#include "avformat.h"
26#include "internal.h"
27
28typedef struct R3DContext {
29 unsigned video_offsets_count;
30 unsigned *video_offsets;
31 unsigned rdvo_offset;
32
33 int audio_channels;
34} R3DContext;
35
36typedef struct Atom {
37 unsigned size;
38 uint32_t tag;
39 uint64_t offset;
40} Atom;
41
42static int read_atom(AVFormatContext *s, Atom *atom)
43{
44 atom->offset = avio_tell(s->pb);
45 atom->size = avio_rb32(s->pb);
46 if (atom->size < 8)
47 return -1;
48 atom->tag = avio_rl32(s->pb);
49 av_log(s, AV_LOG_TRACE, "atom %u %.4s offset %#"PRIx64"\n",
50 atom->size, (char*)&atom->tag, atom->offset);
51 return atom->size;
52}
53
54static int r3d_read_red1(AVFormatContext *s)
55{
56 AVStream *st = avformat_new_stream(s, NULL);
57 R3DContext *r3d = s->priv_data;
58 char filename[258];
59 int tmp;
60 int av_unused tmp2;
61 AVRational framerate;
62
63 if (!st)
64 return AVERROR(ENOMEM);
65 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
66 st->codecpar->codec_id = AV_CODEC_ID_JPEG2000;
67
68 tmp = avio_r8(s->pb); // major version
69 tmp2 = avio_r8(s->pb); // minor version
70 av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
71
72 tmp = avio_rb16(s->pb); // unknown
73 av_log(s, AV_LOG_TRACE, "unknown1 %d\n", tmp);
74
75 tmp = avio_rb32(s->pb);
76 avpriv_set_pts_info(st, 32, 1, tmp);
77
78 tmp = avio_rb32(s->pb); // filenum
79 av_log(s, AV_LOG_TRACE, "filenum %d\n", tmp);
80
81 avio_skip(s->pb, 32); // unknown
82
83 st->codecpar->width = avio_rb32(s->pb);
84 st->codecpar->height = avio_rb32(s->pb);
85
86 tmp = avio_rb16(s->pb); // unknown
87 av_log(s, AV_LOG_TRACE, "unknown2 %d\n", tmp);
88
89 framerate.num = avio_rb16(s->pb);
90 framerate.den = avio_rb16(s->pb);
91 if (framerate.num > 0 && framerate.den > 0) {
92#if FF_API_R_FRAME_RATE
93 st->r_frame_rate =
94#endif
95 st->avg_frame_rate = framerate;
96 }
97
98 r3d->audio_channels = avio_r8(s->pb); // audio channels
99 av_log(s, AV_LOG_TRACE, "audio channels %d\n", tmp);
100
101 avio_read(s->pb, filename, 257);
102 filename[sizeof(filename)-1] = 0;
103 av_dict_set(&st->metadata, "filename", filename, 0);
104
105 av_log(s, AV_LOG_TRACE, "filename %s\n", filename);
106 av_log(s, AV_LOG_TRACE, "resolution %dx%d\n", st->codecpar->width, st->codecpar->height);
107 av_log(s, AV_LOG_TRACE, "timescale %d\n", st->time_base.den);
108 av_log(s, AV_LOG_TRACE, "frame rate %d/%d\n",
109 framerate.num, framerate.den);
110
111 return 0;
112}
113
114static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
115{
116 R3DContext *r3d = s->priv_data;
117 AVStream *st = s->streams[0];
118 int i;
119
120 r3d->video_offsets_count = (atom->size - 8) / 4;
121 r3d->video_offsets = av_malloc(atom->size);
122 if (!r3d->video_offsets)
123 return AVERROR(ENOMEM);
124
125 for (i = 0; i < r3d->video_offsets_count; i++) {
126 r3d->video_offsets[i] = avio_rb32(s->pb);
127 if (!r3d->video_offsets[i]) {
128 r3d->video_offsets_count = i;
129 break;
130 }
131 av_log(s, AV_LOG_TRACE, "video offset %d: %#x\n", i, r3d->video_offsets[i]);
132 }
133
134 if (st->avg_frame_rate.num)
135 st->duration = av_rescale_q(r3d->video_offsets_count,
136 av_inv_q(st->avg_frame_rate),
137 st->time_base);
138 av_log(s, AV_LOG_TRACE, "duration %"PRId64"\n", st->duration);
139
140 return 0;
141}
142
143static void r3d_read_reos(AVFormatContext *s)
144{
145 R3DContext *r3d = s->priv_data;
146 int av_unused tmp;
147
148 r3d->rdvo_offset = avio_rb32(s->pb);
149 avio_rb32(s->pb); // rdvs offset
150 avio_rb32(s->pb); // rdao offset
151 avio_rb32(s->pb); // rdas offset
152
153 tmp = avio_rb32(s->pb);
154 av_log(s, AV_LOG_TRACE, "num video chunks %d\n", tmp);
155
156 tmp = avio_rb32(s->pb);
157 av_log(s, AV_LOG_TRACE, "num audio chunks %d\n", tmp);
158
159 avio_skip(s->pb, 6*4);
160}
161
162static int r3d_read_header(AVFormatContext *s)
163{
164 R3DContext *r3d = s->priv_data;
165 Atom atom;
166 int ret;
167
168 if (read_atom(s, &atom) < 0) {
169 av_log(s, AV_LOG_ERROR, "error reading atom\n");
170 return -1;
171 }
172 if (atom.tag == MKTAG('R','E','D','1')) {
173 if ((ret = r3d_read_red1(s)) < 0) {
174 av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
175 return ret;
176 }
177 } else {
178 av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
179 return -1;
180 }
181
182 /* we cannot create the audio stream now because we do not know the
183 * sample rate */
184 if (r3d->audio_channels)
185 s->ctx_flags |= AVFMTCTX_NOHEADER;
186
187 s->internal->data_offset = avio_tell(s->pb);
188 av_log(s, AV_LOG_TRACE, "data offset %#"PRIx64"\n", s->internal->data_offset);
189 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
190 return 0;
191 // find REOB/REOF/REOS to load index
192 avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET);
193 if (read_atom(s, &atom) < 0)
194 av_log(s, AV_LOG_ERROR, "error reading end atom\n");
195
196 if (atom.tag != MKTAG('R','E','O','B') &&
197 atom.tag != MKTAG('R','E','O','F') &&
198 atom.tag != MKTAG('R','E','O','S'))
199 goto out;
200
201 r3d_read_reos(s);
202
203 if (r3d->rdvo_offset) {
204 avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET);
205 if (read_atom(s, &atom) < 0)
206 av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
207 if (atom.tag == MKTAG('R','D','V','O')) {
208 if (r3d_read_rdvo(s, &atom) < 0)
209 av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
210 }
211 }
212
213 out:
214 avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
215 return 0;
216}
217
218static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
219{
220 AVStream *st = s->streams[0];
221 int tmp;
222 int av_unused tmp2;
223 int64_t pos = avio_tell(s->pb);
224 unsigned dts;
225 int ret;
226
227 dts = avio_rb32(s->pb);
228
229 tmp = avio_rb32(s->pb);
230 av_log(s, AV_LOG_TRACE, "frame num %d\n", tmp);
231
232 tmp = avio_r8(s->pb); // major version
233 tmp2 = avio_r8(s->pb); // minor version
234 av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
235
236 tmp = avio_rb16(s->pb); // unknown
237 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
238
239 if (tmp > 4) {
240 tmp = avio_rb16(s->pb); // unknown
241 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
242
243 tmp = avio_rb16(s->pb); // unknown
244 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
245
246 tmp = avio_rb32(s->pb);
247 av_log(s, AV_LOG_TRACE, "width %d\n", tmp);
248 tmp = avio_rb32(s->pb);
249 av_log(s, AV_LOG_TRACE, "height %d\n", tmp);
250
251 tmp = avio_rb32(s->pb);
252 av_log(s, AV_LOG_TRACE, "metadata len %d\n", tmp);
253 }
254 tmp = atom->size - 8 - (avio_tell(s->pb) - pos);
255 if (tmp < 0)
256 return -1;
257 ret = av_get_packet(s->pb, pkt, tmp);
258 if (ret < 0) {
259 av_log(s, AV_LOG_ERROR, "error reading video packet\n");
260 return -1;
261 }
262
263 pkt->stream_index = 0;
264 pkt->dts = dts;
265 if (st->avg_frame_rate.num)
266 pkt->duration = (uint64_t)st->time_base.den*
267 st->avg_frame_rate.den/st->avg_frame_rate.num;
268 av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64"\n", pkt->dts, pkt->duration);
269
270 return 0;
271}
272
273static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
274{
275 R3DContext *r3d = s->priv_data;
276 AVStream *st;
277 int av_unused tmp, tmp2;
278 int samples, size;
279 int64_t pos = avio_tell(s->pb);
280 unsigned dts;
281 int ret;
282
283 if (s->nb_streams < 2) {
284 st = avformat_new_stream(s, NULL);
285 if (!st)
286 return AVERROR(ENOMEM);
287 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
288 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE;
289 st->codecpar->channels = r3d->audio_channels;
290 avpriv_set_pts_info(st, 32, 1, s->streams[0]->time_base.den);
291 } else {
292 st = s->streams[1];
293 }
294
295 dts = avio_rb32(s->pb);
296
297 st->codecpar->sample_rate = avio_rb32(s->pb);
298 if (st->codecpar->sample_rate <= 0) {
299 av_log(s, AV_LOG_ERROR, "Bad sample rate\n");
300 return AVERROR_INVALIDDATA;
301 }
302
303 samples = avio_rb32(s->pb);
304
305 tmp = avio_rb32(s->pb);
306 av_log(s, AV_LOG_TRACE, "packet num %d\n", tmp);
307
308 tmp = avio_rb16(s->pb); // unknown
309 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
310
311 tmp = avio_r8(s->pb); // major version
312 tmp2 = avio_r8(s->pb); // minor version
313 av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
314
315 tmp = avio_rb32(s->pb); // unknown
316 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
317
318 size = atom->size - 8 - (avio_tell(s->pb) - pos);
319 if (size < 0)
320 return -1;
321 ret = av_get_packet(s->pb, pkt, size);
322 if (ret < 0) {
323 av_log(s, AV_LOG_ERROR, "error reading audio packet\n");
324 return ret;
325 }
326
327 pkt->stream_index = 1;
328 pkt->dts = dts;
329 if (st->codecpar->sample_rate)
330 pkt->duration = av_rescale(samples, st->time_base.den, st->codecpar->sample_rate);
331 av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64" samples %d sample rate %d\n",
332 pkt->dts, pkt->duration, samples, st->codecpar->sample_rate);
333
334 return 0;
335}
336
337static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
338{
339 R3DContext *r3d = s->priv_data;
340 Atom atom;
341 int err = 0;
342
343 while (!err) {
344 if (read_atom(s, &atom) < 0) {
345 err = -1;
346 break;
347 }
348 switch (atom.tag) {
349 case MKTAG('R','E','D','V'):
350 if (s->streams[0]->discard == AVDISCARD_ALL)
351 goto skip;
352 if (!(err = r3d_read_redv(s, pkt, &atom)))
353 return 0;
354 break;
355 case MKTAG('R','E','D','A'):
356 if (!r3d->audio_channels)
357 return -1;
358 if (s->nb_streams >= 2 && s->streams[1]->discard == AVDISCARD_ALL)
359 goto skip;
360 if (!(err = r3d_read_reda(s, pkt, &atom)))
361 return 0;
362 break;
363 default:
364 skip:
365 avio_skip(s->pb, atom.size-8);
366 }
367 }
368 return err;
369}
370
371static int r3d_probe(AVProbeData *p)
372{
373 if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
374 return AVPROBE_SCORE_MAX;
375 return 0;
376}
377
378static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
379{
380 AVStream *st = s->streams[0]; // video stream
381 R3DContext *r3d = s->priv_data;
382 int frame_num;
383
384 if (!st->avg_frame_rate.num)
385 return -1;
386
387 frame_num = av_rescale_q(sample_time, st->time_base,
388 av_inv_q(st->avg_frame_rate));
389 av_log(s, AV_LOG_TRACE, "seek frame num %d timestamp %"PRId64"\n",
390 frame_num, sample_time);
391
392 if (frame_num < r3d->video_offsets_count) {
393 if (avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET) < 0)
394 return -1;
395 } else {
396 av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
397 return -1;
398 }
399
400 return 0;
401}
402
403static int r3d_close(AVFormatContext *s)
404{
405 R3DContext *r3d = s->priv_data;
406
407 av_freep(&r3d->video_offsets);
408
409 return 0;
410}
411
412AVInputFormat ff_r3d_demuxer = {
413 .name = "r3d",
414 .long_name = NULL_IF_CONFIG_SMALL("REDCODE R3D"),
415 .priv_data_size = sizeof(R3DContext),
416 .read_probe = r3d_probe,
417 .read_header = r3d_read_header,
418 .read_packet = r3d_read_packet,
419 .read_close = r3d_close,
420 .read_seek = r3d_seek,
421};
422
generated by cgit at 2024-05-17 03:08:32 (GMT)