3 * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
5 * This file is part of Libav.
7 * Libav 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.
12 * Libav 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/intreadwrite.h"
23 #include "libavutil/dict.h"
24 #include "libavutil/mathematics.h"
28 typedef struct R3DContext {
29 unsigned video_offsets_count;
30 unsigned *video_offsets;
40 static int read_atom(AVFormatContext *s, Atom *atom)
42 atom->offset = avio_tell(s->pb);
43 atom->size = avio_rb32(s->pb);
46 atom->tag = avio_rl32(s->pb);
47 av_log(s, AV_LOG_TRACE, "atom %u %.4s offset %#"PRIx64"\n",
48 atom->size, (char*)&atom->tag, atom->offset);
52 static int r3d_read_red1(AVFormatContext *s)
54 AVStream *st = avformat_new_stream(s, NULL);
61 return AVERROR(ENOMEM);
62 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
63 st->codec->codec_id = AV_CODEC_ID_JPEG2000;
65 tmp = avio_r8(s->pb); // major version
66 tmp2 = avio_r8(s->pb); // minor version
67 av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
69 tmp = avio_rb16(s->pb); // unknown
70 av_log(s, AV_LOG_TRACE, "unknown1 %d\n", tmp);
72 tmp = avio_rb32(s->pb);
73 avpriv_set_pts_info(st, 32, 1, tmp);
75 tmp = avio_rb32(s->pb); // filenum
76 av_log(s, AV_LOG_TRACE, "filenum %d\n", tmp);
78 avio_skip(s->pb, 32); // unknown
80 st->codec->width = avio_rb32(s->pb);
81 st->codec->height = avio_rb32(s->pb);
83 tmp = avio_rb16(s->pb); // unknown
84 av_log(s, AV_LOG_TRACE, "unknown2 %d\n", tmp);
86 framerate.num = avio_rb16(s->pb);
87 framerate.den = avio_rb16(s->pb);
88 if (framerate.num > 0 && framerate.den > 0) {
89 st->avg_frame_rate = framerate;
92 tmp = avio_r8(s->pb); // audio channels
93 av_log(s, AV_LOG_TRACE, "audio channels %d\n", tmp);
95 AVStream *ast = avformat_new_stream(s, NULL);
97 return AVERROR(ENOMEM);
98 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
99 ast->codec->codec_id = AV_CODEC_ID_PCM_S32BE;
100 ast->codec->channels = tmp;
101 avpriv_set_pts_info(ast, 32, 1, st->time_base.den);
104 avio_read(s->pb, filename, 257);
105 filename[sizeof(filename)-1] = 0;
106 av_dict_set(&st->metadata, "filename", filename, 0);
108 av_log(s, AV_LOG_TRACE, "filename %s\n", filename);
109 av_log(s, AV_LOG_TRACE, "resolution %dx%d\n", st->codec->width, st->codec->height);
110 av_log(s, AV_LOG_TRACE, "timescale %d\n", st->time_base.den);
111 av_log(s, AV_LOG_TRACE, "frame rate %d/%d\n",
112 framerate.num, framerate.den);
117 static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
119 R3DContext *r3d = s->priv_data;
120 AVStream *st = s->streams[0];
123 r3d->video_offsets_count = (atom->size - 8) / 4;
124 r3d->video_offsets = av_malloc(atom->size);
125 if (!r3d->video_offsets)
126 return AVERROR(ENOMEM);
128 for (i = 0; i < r3d->video_offsets_count; i++) {
129 r3d->video_offsets[i] = avio_rb32(s->pb);
130 if (!r3d->video_offsets[i]) {
131 r3d->video_offsets_count = i;
134 av_log(s, AV_LOG_TRACE, "video offset %d: %#x\n", i, r3d->video_offsets[i]);
137 if (st->avg_frame_rate.num)
138 st->duration = av_rescale_q(r3d->video_offsets_count,
139 (AVRational){st->avg_frame_rate.den,
140 st->avg_frame_rate.num},
142 av_log(s, AV_LOG_TRACE, "duration %"PRId64"\n", st->duration);
147 static void r3d_read_reos(AVFormatContext *s)
149 R3DContext *r3d = s->priv_data;
152 r3d->rdvo_offset = avio_rb32(s->pb);
153 avio_rb32(s->pb); // rdvs offset
154 avio_rb32(s->pb); // rdao offset
155 avio_rb32(s->pb); // rdas offset
157 tmp = avio_rb32(s->pb);
158 av_log(s, AV_LOG_TRACE, "num video chunks %d\n", tmp);
160 tmp = avio_rb32(s->pb);
161 av_log(s, AV_LOG_TRACE, "num audio chunks %d\n", tmp);
163 avio_skip(s->pb, 6*4);
166 static int r3d_read_header(AVFormatContext *s)
168 R3DContext *r3d = s->priv_data;
172 if (read_atom(s, &atom) < 0) {
173 av_log(s, AV_LOG_ERROR, "error reading atom\n");
176 if (atom.tag == MKTAG('R','E','D','1')) {
177 if ((ret = r3d_read_red1(s)) < 0) {
178 av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
182 av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
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)
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");
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'))
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");
213 avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
217 static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
219 AVStream *st = s->streams[0];
222 int64_t pos = avio_tell(s->pb);
226 dts = avio_rb32(s->pb);
228 tmp = avio_rb32(s->pb);
229 av_log(s, AV_LOG_TRACE, "frame num %d\n", tmp);
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);
235 tmp = avio_rb16(s->pb); // unknown
236 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
239 tmp = avio_rb16(s->pb); // unknown
240 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
242 tmp = avio_rb16(s->pb); // unknown
243 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
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);
250 tmp = avio_rb32(s->pb);
251 av_log(s, AV_LOG_TRACE, "metadata len %d\n", tmp);
253 tmp = atom->size - 8 - (avio_tell(s->pb) - pos);
256 ret = av_get_packet(s->pb, pkt, tmp);
258 av_log(s, AV_LOG_ERROR, "error reading video packet\n");
262 pkt->stream_index = 0;
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);
272 static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
274 AVStream *st = s->streams[1];
275 int av_unused tmp, tmp2;
277 int64_t pos = avio_tell(s->pb);
281 dts = avio_rb32(s->pb);
283 st->codec->sample_rate = avio_rb32(s->pb);
284 if (st->codec->sample_rate <= 0) {
285 av_log(s, AV_LOG_ERROR, "Bad sample rate\n");
286 return AVERROR_INVALIDDATA;
289 samples = avio_rb32(s->pb);
291 tmp = avio_rb32(s->pb);
292 av_log(s, AV_LOG_TRACE, "packet num %d\n", tmp);
294 tmp = avio_rb16(s->pb); // unknown
295 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
297 tmp = avio_r8(s->pb); // major version
298 tmp2 = avio_r8(s->pb); // minor version
299 av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
301 tmp = avio_rb32(s->pb); // unknown
302 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
304 size = atom->size - 8 - (avio_tell(s->pb) - pos);
307 ret = av_get_packet(s->pb, pkt, size);
309 av_log(s, AV_LOG_ERROR, "error reading audio packet\n");
313 pkt->stream_index = 1;
315 pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate);
316 av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64" samples %d sample rate %d\n",
317 pkt->dts, pkt->duration, samples, st->codec->sample_rate);
322 static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
328 if (read_atom(s, &atom) < 0) {
333 case MKTAG('R','E','D','V'):
334 if (s->streams[0]->discard == AVDISCARD_ALL)
336 if (!(err = r3d_read_redv(s, pkt, &atom)))
339 case MKTAG('R','E','D','A'):
340 if (s->nb_streams < 2)
342 if (s->streams[1]->discard == AVDISCARD_ALL)
344 if (!(err = r3d_read_reda(s, pkt, &atom)))
349 avio_skip(s->pb, atom.size-8);
355 static int r3d_probe(AVProbeData *p)
357 if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
358 return AVPROBE_SCORE_MAX;
362 static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
364 AVStream *st = s->streams[0]; // video stream
365 R3DContext *r3d = s->priv_data;
368 if (!st->avg_frame_rate.num)
371 frame_num = av_rescale_q(sample_time, st->time_base,
372 (AVRational){st->avg_frame_rate.den, st->avg_frame_rate.num});
373 av_log(s, AV_LOG_TRACE, "seek frame num %d timestamp %"PRId64"\n",
374 frame_num, sample_time);
376 if (frame_num < r3d->video_offsets_count) {
377 if (avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET) < 0)
380 av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
387 static int r3d_close(AVFormatContext *s)
389 R3DContext *r3d = s->priv_data;
391 av_freep(&r3d->video_offsets);
396 AVInputFormat ff_r3d_demuxer = {
398 .long_name = NULL_IF_CONFIG_SMALL("REDCODE R3D"),
399 .priv_data_size = sizeof(R3DContext),
400 .read_probe = r3d_probe,
401 .read_header = r3d_read_header,
402 .read_packet = r3d_read_packet,
403 .read_close = r3d_close,
404 .read_seek = r3d_seek,