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;
42 static int read_atom(AVFormatContext *s, Atom *atom)
44 atom->offset = avio_tell(s->pb);
45 atom->size = avio_rb32(s->pb);
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);
54 static int r3d_read_red1(AVFormatContext *s)
56 AVStream *st = avformat_new_stream(s, NULL);
57 R3DContext *r3d = s->priv_data;
64 return AVERROR(ENOMEM);
65 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
66 st->codecpar->codec_id = AV_CODEC_ID_JPEG2000;
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);
72 tmp = avio_rb16(s->pb); // unknown
73 av_log(s, AV_LOG_TRACE, "unknown1 %d\n", tmp);
75 tmp = avio_rb32(s->pb);
76 avpriv_set_pts_info(st, 32, 1, tmp);
78 tmp = avio_rb32(s->pb); // filenum
79 av_log(s, AV_LOG_TRACE, "filenum %d\n", tmp);
81 avio_skip(s->pb, 32); // unknown
83 st->codecpar->width = avio_rb32(s->pb);
84 st->codecpar->height = avio_rb32(s->pb);
86 tmp = avio_rb16(s->pb); // unknown
87 av_log(s, AV_LOG_TRACE, "unknown2 %d\n", tmp);
89 framerate.num = avio_rb16(s->pb);
90 framerate.den = avio_rb16(s->pb);
91 if (framerate.num > 0 && framerate.den > 0) {
92 st->avg_frame_rate = framerate;
95 r3d->audio_channels = avio_r8(s->pb); // audio channels
96 av_log(s, AV_LOG_TRACE, "audio channels %d\n", tmp);
98 avio_read(s->pb, filename, 257);
99 filename[sizeof(filename)-1] = 0;
100 av_dict_set(&st->metadata, "filename", filename, 0);
102 av_log(s, AV_LOG_TRACE, "filename %s\n", filename);
103 av_log(s, AV_LOG_TRACE, "resolution %dx%d\n", st->codecpar->width, st->codecpar->height);
104 av_log(s, AV_LOG_TRACE, "timescale %d\n", st->time_base.den);
105 av_log(s, AV_LOG_TRACE, "frame rate %d/%d\n",
106 framerate.num, framerate.den);
111 static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
113 R3DContext *r3d = s->priv_data;
114 AVStream *st = s->streams[0];
117 r3d->video_offsets_count = (atom->size - 8) / 4;
118 r3d->video_offsets = av_malloc(atom->size);
119 if (!r3d->video_offsets)
120 return AVERROR(ENOMEM);
122 for (i = 0; i < r3d->video_offsets_count; i++) {
123 r3d->video_offsets[i] = avio_rb32(s->pb);
124 if (!r3d->video_offsets[i]) {
125 r3d->video_offsets_count = i;
128 av_log(s, AV_LOG_TRACE, "video offset %d: %#x\n", i, r3d->video_offsets[i]);
131 if (st->avg_frame_rate.num)
132 st->duration = av_rescale_q(r3d->video_offsets_count,
133 (AVRational){st->avg_frame_rate.den,
134 st->avg_frame_rate.num},
136 av_log(s, AV_LOG_TRACE, "duration %"PRId64"\n", st->duration);
141 static void r3d_read_reos(AVFormatContext *s)
143 R3DContext *r3d = s->priv_data;
146 r3d->rdvo_offset = avio_rb32(s->pb);
147 avio_rb32(s->pb); // rdvs offset
148 avio_rb32(s->pb); // rdao offset
149 avio_rb32(s->pb); // rdas offset
151 tmp = avio_rb32(s->pb);
152 av_log(s, AV_LOG_TRACE, "num video chunks %d\n", tmp);
154 tmp = avio_rb32(s->pb);
155 av_log(s, AV_LOG_TRACE, "num audio chunks %d\n", tmp);
157 avio_skip(s->pb, 6*4);
160 static int r3d_read_header(AVFormatContext *s)
162 R3DContext *r3d = s->priv_data;
166 if (read_atom(s, &atom) < 0) {
167 av_log(s, AV_LOG_ERROR, "error reading atom\n");
170 if (atom.tag == MKTAG('R','E','D','1')) {
171 if ((ret = r3d_read_red1(s)) < 0) {
172 av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
176 av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
180 /* we cannot create the audio stream now because we do not know the
182 if (r3d->audio_channels)
183 s->ctx_flags |= AVFMTCTX_NOHEADER;
185 s->internal->data_offset = avio_tell(s->pb);
186 av_log(s, AV_LOG_TRACE, "data offset %#"PRIx64"\n", s->internal->data_offset);
187 if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
189 // find REOB/REOF/REOS to load index
190 avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET);
191 if (read_atom(s, &atom) < 0)
192 av_log(s, AV_LOG_ERROR, "error reading end atom\n");
194 if (atom.tag != MKTAG('R','E','O','B') &&
195 atom.tag != MKTAG('R','E','O','F') &&
196 atom.tag != MKTAG('R','E','O','S'))
201 if (r3d->rdvo_offset) {
202 avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET);
203 if (read_atom(s, &atom) < 0)
204 av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
205 if (atom.tag == MKTAG('R','D','V','O')) {
206 if (r3d_read_rdvo(s, &atom) < 0)
207 av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
212 avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
216 static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
218 AVStream *st = s->streams[0];
221 int64_t pos = avio_tell(s->pb);
225 dts = avio_rb32(s->pb);
227 tmp = avio_rb32(s->pb);
228 av_log(s, AV_LOG_TRACE, "frame num %d\n", tmp);
230 tmp = avio_r8(s->pb); // major version
231 tmp2 = avio_r8(s->pb); // minor version
232 av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
234 tmp = avio_rb16(s->pb); // unknown
235 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
238 tmp = avio_rb16(s->pb); // unknown
239 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
241 tmp = avio_rb16(s->pb); // unknown
242 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
244 tmp = avio_rb32(s->pb);
245 av_log(s, AV_LOG_TRACE, "width %d\n", tmp);
246 tmp = avio_rb32(s->pb);
247 av_log(s, AV_LOG_TRACE, "height %d\n", tmp);
249 tmp = avio_rb32(s->pb);
250 av_log(s, AV_LOG_TRACE, "metadata len %d\n", tmp);
252 tmp = atom->size - 8 - (avio_tell(s->pb) - pos);
255 ret = av_get_packet(s->pb, pkt, tmp);
257 av_log(s, AV_LOG_ERROR, "error reading video packet\n");
261 pkt->stream_index = 0;
263 if (st->avg_frame_rate.num)
264 pkt->duration = (uint64_t)st->time_base.den*
265 st->avg_frame_rate.den/st->avg_frame_rate.num;
266 av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64"\n", pkt->dts, pkt->duration);
271 static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
273 R3DContext *r3d = s->priv_data;
275 int av_unused tmp, tmp2;
277 int64_t pos = avio_tell(s->pb);
281 if (s->nb_streams < 2) {
282 st = avformat_new_stream(s, NULL);
284 return AVERROR(ENOMEM);
285 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
286 st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE;
287 st->codecpar->channels = r3d->audio_channels;
288 avpriv_set_pts_info(st, 32, 1, s->streams[0]->time_base.den);
293 dts = avio_rb32(s->pb);
295 st->codecpar->sample_rate = avio_rb32(s->pb);
296 if (st->codecpar->sample_rate <= 0) {
297 av_log(s, AV_LOG_ERROR, "Bad sample rate\n");
298 return AVERROR_INVALIDDATA;
301 samples = avio_rb32(s->pb);
303 tmp = avio_rb32(s->pb);
304 av_log(s, AV_LOG_TRACE, "packet num %d\n", tmp);
306 tmp = avio_rb16(s->pb); // unknown
307 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
309 tmp = avio_r8(s->pb); // major version
310 tmp2 = avio_r8(s->pb); // minor version
311 av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
313 tmp = avio_rb32(s->pb); // unknown
314 av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
316 size = atom->size - 8 - (avio_tell(s->pb) - pos);
319 ret = av_get_packet(s->pb, pkt, size);
321 av_log(s, AV_LOG_ERROR, "error reading audio packet\n");
325 pkt->stream_index = 1;
327 pkt->duration = av_rescale(samples, st->time_base.den, st->codecpar->sample_rate);
328 av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64" samples %d sample rate %d\n",
329 pkt->dts, pkt->duration, samples, st->codecpar->sample_rate);
334 static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
336 R3DContext *r3d = s->priv_data;
341 if (read_atom(s, &atom) < 0) {
346 case MKTAG('R','E','D','V'):
347 if (s->streams[0]->discard == AVDISCARD_ALL)
349 if (!(err = r3d_read_redv(s, pkt, &atom)))
352 case MKTAG('R','E','D','A'):
353 if (!r3d->audio_channels)
355 if (s->nb_streams >= 2 && s->streams[1]->discard == AVDISCARD_ALL)
357 if (!(err = r3d_read_reda(s, pkt, &atom)))
362 avio_skip(s->pb, atom.size-8);
368 static int r3d_probe(AVProbeData *p)
370 if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
371 return AVPROBE_SCORE_MAX;
375 static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
377 AVStream *st = s->streams[0]; // video stream
378 R3DContext *r3d = s->priv_data;
381 if (!st->avg_frame_rate.num)
384 frame_num = av_rescale_q(sample_time, st->time_base,
385 (AVRational){st->avg_frame_rate.den, st->avg_frame_rate.num});
386 av_log(s, AV_LOG_TRACE, "seek frame num %d timestamp %"PRId64"\n",
387 frame_num, sample_time);
389 if (frame_num < r3d->video_offsets_count) {
390 if (avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET) < 0)
393 av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
400 static int r3d_close(AVFormatContext *s)
402 R3DContext *r3d = s->priv_data;
404 av_freep(&r3d->video_offsets);
409 AVInputFormat ff_r3d_demuxer = {
411 .long_name = NULL_IF_CONFIG_SMALL("REDCODE R3D"),
412 .priv_data_size = sizeof(R3DContext),
413 .read_probe = r3d_probe,
414 .read_header = r3d_read_header,
415 .read_packet = r3d_read_packet,
416 .read_close = r3d_close,
417 .read_seek = r3d_seek,