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
28 typedef struct R3DContext {
29 unsigned video_offsets_count;
30 unsigned rdvo_offset;
31
32 int audio_channels;
33 } R3DContext;
34
35 typedef struct Atom {
36 unsigned size;
37 uint32_t tag;
38 uint64_t offset;
39 } Atom;
40
read_atom(AVFormatContext *s, Atom *atom)41 static int read_atom(AVFormatContext *s, Atom *atom)
42 {
43 atom->offset = avio_tell(s->pb);
44 atom->size = avio_rb32(s->pb);
45 if (atom->size < 8)
46 return -1;
47 atom->tag = avio_rl32(s->pb);
48 av_log(s, AV_LOG_TRACE, "atom %u %.4s offset %#"PRIx64"\n",
49 atom->size, (char*)&atom->tag, atom->offset);
50 return atom->size;
51 }
52
r3d_read_red1(AVFormatContext *s)53 static int r3d_read_red1(AVFormatContext *s)
54 {
55 AVStream *st = avformat_new_stream(s, NULL);
56 R3DContext *r3d = s->priv_data;
57 char filename[258];
58 int tmp;
59 int ret;
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 ret = avio_read(s->pb, filename, 257);
102 if (ret < 257)
103 return ret < 0 ? ret : AVERROR_EOF;
104 filename[sizeof(filename)-1] = 0;
105 av_dict_set(&st->metadata, "filename", filename, 0);
106
107 av_log(s, AV_LOG_TRACE, "filename %s\n", filename);
108 av_log(s, AV_LOG_TRACE, "resolution %dx%d\n", st->codecpar->width, st->codecpar->height);
109 av_log(s, AV_LOG_TRACE, "timescale %d\n", st->time_base.den);
110 av_log(s, AV_LOG_TRACE, "frame rate %d/%d\n",
111 framerate.num, framerate.den);
112
113 return 0;
114 }
115
r3d_read_rdvo(AVFormatContext *s, Atom *atom)116 static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
117 {
118 R3DContext *r3d = s->priv_data;
119 AVStream *st = s->streams[0];
120 int i;
121
122 r3d->video_offsets_count = (atom->size - 8) / 4;
123
124 for (i = 0; i < r3d->video_offsets_count; i++) {
125 unsigned video_offset = avio_rb32(s->pb);
126 if (!video_offset) {
127 r3d->video_offsets_count = i;
128 break;
129 }
130 av_log(s, AV_LOG_TRACE, "video offset %d: %#x\n", i, video_offset);
131 }
132
133 if (st->avg_frame_rate.num)
134 st->duration = av_rescale_q(r3d->video_offsets_count,
135 av_inv_q(st->avg_frame_rate),
136 st->time_base);
137 av_log(s, AV_LOG_TRACE, "duration %"PRId64"\n", st->duration);
138
139 return 0;
140 }
141
r3d_read_reos(AVFormatContext *s)142 static void r3d_read_reos(AVFormatContext *s)
143 {
144 R3DContext *r3d = s->priv_data;
145 int av_unused tmp;
146
147 r3d->rdvo_offset = avio_rb32(s->pb);
148 avio_rb32(s->pb); // rdvs offset
149 avio_rb32(s->pb); // rdao offset
150 avio_rb32(s->pb); // rdas offset
151
152 tmp = avio_rb32(s->pb);
153 av_log(s, AV_LOG_TRACE, "num video chunks %d\n", tmp);
154
155 tmp = avio_rb32(s->pb);
156 av_log(s, AV_LOG_TRACE, "num audio chunks %d\n", tmp);
157
158 avio_skip(s->pb, 6*4);
159 }
160
r3d_read_header(AVFormatContext *s)161 static int r3d_read_header(AVFormatContext *s)
162 {
163 FFFormatContext *const si = ffformatcontext(s);
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 si->data_offset = avio_tell(s->pb);
188 av_log(s, AV_LOG_TRACE, "data offset %#"PRIx64"\n", si->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, si->data_offset, SEEK_SET);
215 return 0;
216 }
217
r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)218 static 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
r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)273 static 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->ch_layout.nb_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
330 if (st->codecpar->sample_rate && samples > 0)
331 pkt->duration = av_rescale(samples, st->time_base.den, st->codecpar->sample_rate);
332 av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64" samples %d sample rate %d\n",
333 pkt->dts, pkt->duration, samples, st->codecpar->sample_rate);
334
335 return 0;
336 }
337
r3d_read_packet(AVFormatContext *s, AVPacket *pkt)338 static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
339 {
340 R3DContext *r3d = s->priv_data;
341 Atom atom;
342 int err = 0;
343
344 while (!err) {
345 if (read_atom(s, &atom) < 0) {
346 err = -1;
347 break;
348 }
349 switch (atom.tag) {
350 case MKTAG('R','E','D','V'):
351 if (s->streams[0]->discard == AVDISCARD_ALL)
352 goto skip;
353 if (!(err = r3d_read_redv(s, pkt, &atom)))
354 return 0;
355 break;
356 case MKTAG('R','E','D','A'):
357 if (!r3d->audio_channels)
358 return -1;
359 if (s->nb_streams >= 2 && s->streams[1]->discard == AVDISCARD_ALL)
360 goto skip;
361 if (!(err = r3d_read_reda(s, pkt, &atom)))
362 return 0;
363 break;
364 default:
365 skip:
366 avio_skip(s->pb, atom.size-8);
367 }
368 }
369 return err;
370 }
371
r3d_probe(const AVProbeData *p)372 static int r3d_probe(const AVProbeData *p)
373 {
374 if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
375 return AVPROBE_SCORE_MAX;
376 return 0;
377 }
378
r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)379 static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
380 {
381 AVStream *st = s->streams[0]; // video stream
382 R3DContext *r3d = s->priv_data;
383 int frame_num;
384
385 if (!st->avg_frame_rate.num)
386 return -1;
387
388 frame_num = av_rescale_q(sample_time, st->time_base,
389 av_inv_q(st->avg_frame_rate));
390 av_log(s, AV_LOG_TRACE, "seek frame num %d timestamp %"PRId64"\n",
391 frame_num, sample_time);
392
393 if (frame_num < r3d->video_offsets_count) {
394 if (avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET) < 0)
395 return -1;
396 } else {
397 av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
398 return -1;
399 }
400
401 return 0;
402 }
403
404 const AVInputFormat ff_r3d_demuxer = {
405 .name = "r3d",
406 .long_name = NULL_IF_CONFIG_SMALL("REDCODE R3D"),
407 .priv_data_size = sizeof(R3DContext),
408 .read_probe = r3d_probe,
409 .read_header = r3d_read_header,
410 .read_packet = r3d_read_packet,
411 .read_seek = r3d_seek,
412 };
413