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 R3DContext *r3d = s->priv_data;
164 Atom atom;
165 int ret;
166
167 if (read_atom(s, &atom) < 0) {
168 av_log(s, AV_LOG_ERROR, "error reading atom\n");
169 return -1;
170 }
171 if (atom.tag == MKTAG('R','E','D','1')) {
172 if ((ret = r3d_read_red1(s)) < 0) {
173 av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
174 return ret;
175 }
176 } else {
177 av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
178 return -1;
179 }
180
181 /* we cannot create the audio stream now because we do not know the
182 * sample rate */
183 if (r3d->audio_channels)
184 s->ctx_flags |= AVFMTCTX_NOHEADER;
185
186 s->internal->data_offset = avio_tell(s->pb);
187 av_log(s, AV_LOG_TRACE, "data offset %#"PRIx64"\n", s->internal->data_offset);
188 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
189 return 0;
190 // find REOB/REOF/REOS to load index
191 avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET);
192 if (read_atom(s, &atom) < 0)
193 av_log(s, AV_LOG_ERROR, "error reading end atom\n");
194
195 if (atom.tag != MKTAG('R','E','O','B') &&
196 atom.tag != MKTAG('R','E','O','F') &&
197 atom.tag != MKTAG('R','E','O','S'))
198 goto out;
199
200 r3d_read_reos(s);
201
202 if (r3d->rdvo_offset) {
203 avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET);
204 if (read_atom(s, &atom) < 0)
205 av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
206 if (atom.tag == MKTAG('R','D','V','O')) {
207 if (r3d_read_rdvo(s, &atom) < 0)
208 av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
209 }
210 }
211
212 out:
213 avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
214 return 0;
215 }
216
r3d_read_redv(AVFormatContext * s,AVPacket * pkt,Atom * atom)217 static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
218 {
219 AVStream *st = s->streams[0];
220 int tmp;
221 int av_unused tmp2;
222 int64_t pos = avio_tell(s->pb);
223 unsigned dts;
224 int ret;
225
226 dts = avio_rb32(s->pb);
227
228 tmp = avio_rb32(s->pb);
229 av_log(s, AV_LOG_TRACE, "frame num %d\n", tmp);
230
231 tmp = avio_r8(s->pb); // major version
232 tmp2 = avio_r8(s->pb); // minor version
233 av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
234
235 tmp = avio_rb16(s->pb); // unknown
236 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
237
238 if (tmp > 4) {
239 tmp = avio_rb16(s->pb); // unknown
240 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
241
242 tmp = avio_rb16(s->pb); // unknown
243 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
244
245 tmp = avio_rb32(s->pb);
246 av_log(s, AV_LOG_TRACE, "width %d\n", tmp);
247 tmp = avio_rb32(s->pb);
248 av_log(s, AV_LOG_TRACE, "height %d\n", tmp);
249
250 tmp = avio_rb32(s->pb);
251 av_log(s, AV_LOG_TRACE, "metadata len %d\n", tmp);
252 }
253 tmp = atom->size - 8 - (avio_tell(s->pb) - pos);
254 if (tmp < 0)
255 return -1;
256 ret = av_get_packet(s->pb, pkt, tmp);
257 if (ret < 0) {
258 av_log(s, AV_LOG_ERROR, "error reading video packet\n");
259 return -1;
260 }
261
262 pkt->stream_index = 0;
263 pkt->dts = dts;
264 if (st->avg_frame_rate.num)
265 pkt->duration = (uint64_t)st->time_base.den*
266 st->avg_frame_rate.den/st->avg_frame_rate.num;
267 av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64"\n", pkt->dts, pkt->duration);
268
269 return 0;
270 }
271
r3d_read_reda(AVFormatContext * s,AVPacket * pkt,Atom * atom)272 static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
273 {
274 R3DContext *r3d = s->priv_data;
275 AVStream *st;
276 int av_unused tmp, tmp2;
277 int samples, size;
278 int64_t pos = avio_tell(s->pb);
279 unsigned dts;
280 int ret;
281
282 if (s->nb_streams < 2) {
283 st = avformat_new_stream(s, NULL);
284 if (!st)
285 return AVERROR(ENOMEM);
286 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
287 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE;
288 st->codecpar->channels = r3d->audio_channels;
289 avpriv_set_pts_info(st, 32, 1, s->streams[0]->time_base.den);
290 } else {
291 st = s->streams[1];
292 }
293
294 dts = avio_rb32(s->pb);
295
296 st->codecpar->sample_rate = avio_rb32(s->pb);
297 if (st->codecpar->sample_rate <= 0) {
298 av_log(s, AV_LOG_ERROR, "Bad sample rate\n");
299 return AVERROR_INVALIDDATA;
300 }
301
302 samples = avio_rb32(s->pb);
303
304 tmp = avio_rb32(s->pb);
305 av_log(s, AV_LOG_TRACE, "packet num %d\n", tmp);
306
307 tmp = avio_rb16(s->pb); // unknown
308 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
309
310 tmp = avio_r8(s->pb); // major version
311 tmp2 = avio_r8(s->pb); // minor version
312 av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
313
314 tmp = avio_rb32(s->pb); // unknown
315 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
316
317 size = atom->size - 8 - (avio_tell(s->pb) - pos);
318 if (size < 0)
319 return -1;
320 ret = av_get_packet(s->pb, pkt, size);
321 if (ret < 0) {
322 av_log(s, AV_LOG_ERROR, "error reading audio packet\n");
323 return ret;
324 }
325
326 pkt->stream_index = 1;
327 pkt->dts = dts;
328
329 if (st->codecpar->sample_rate && samples > 0)
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
r3d_read_packet(AVFormatContext * s,AVPacket * pkt)337 static 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
r3d_probe(const AVProbeData * p)371 static int r3d_probe(const 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
r3d_seek(AVFormatContext * s,int stream_index,int64_t sample_time,int flags)378 static 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
403 AVInputFormat ff_r3d_demuxer = {
404 .name = "r3d",
405 .long_name = NULL_IF_CONFIG_SMALL("REDCODE R3D"),
406 .priv_data_size = sizeof(R3DContext),
407 .read_probe = r3d_probe,
408 .read_header = r3d_read_header,
409 .read_packet = r3d_read_packet,
410 .read_seek = r3d_seek,
411 };
412