avio: avio_ prefixes for get_* functions
[libav.git] / libavformat / r3d.c
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 //#define DEBUG
23
24 #include "libavutil/intreadwrite.h"
25 #include "avformat.h"
26
27 typedef struct {
28 unsigned video_offsets_count;
29 unsigned *video_offsets;
30 unsigned rdvo_offset;
31 } R3DContext;
32
33 typedef struct {
34 unsigned size;
35 uint32_t tag;
36 uint64_t offset;
37 } Atom;
38
39 static int read_atom(AVFormatContext *s, Atom *atom)
40 {
41 atom->offset = url_ftell(s->pb);
42 atom->size = avio_rb32(s->pb);
43 if (atom->size < 8)
44 return -1;
45 atom->tag = avio_rl32(s->pb);
46 av_dlog(s, "atom %d %.4s offset %#llx\n",
47 atom->size, (char*)&atom->tag, atom->offset);
48 return atom->size;
49 }
50
51 static int r3d_read_red1(AVFormatContext *s)
52 {
53 AVStream *st = av_new_stream(s, 0);
54 char filename[258];
55 int tmp, tmp2;
56
57 if (!st)
58 return AVERROR(ENOMEM);
59 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
60 st->codec->codec_id = CODEC_ID_JPEG2000;
61
62 tmp = avio_r8(s->pb); // major version
63 tmp2 = avio_r8(s->pb); // minor version
64 av_dlog(s, "version %d.%d\n", tmp, tmp2);
65
66 tmp = avio_rb16(s->pb); // unknown
67 av_dlog(s, "unknown1 %d\n", tmp);
68
69 tmp = avio_rb32(s->pb);
70 av_set_pts_info(st, 32, 1, tmp);
71
72 tmp = avio_rb32(s->pb); // filenum
73 av_dlog(s, "filenum %d\n", tmp);
74
75 url_fskip(s->pb, 32); // unknown
76
77 st->codec->width = avio_rb32(s->pb);
78 st->codec->height = avio_rb32(s->pb);
79
80 tmp = avio_rb16(s->pb); // unknown
81 av_dlog(s, "unknown2 %d\n", tmp);
82
83 st->codec->time_base.den = avio_rb16(s->pb);
84 st->codec->time_base.num = avio_rb16(s->pb);
85
86 tmp = avio_r8(s->pb); // audio channels
87 av_dlog(s, "audio channels %d\n", tmp);
88 if (tmp > 0) {
89 AVStream *ast = av_new_stream(s, 1);
90 if (!ast)
91 return AVERROR(ENOMEM);
92 ast->codec->codec_type = AVMEDIA_TYPE_AUDIO;
93 ast->codec->codec_id = CODEC_ID_PCM_S32BE;
94 ast->codec->channels = tmp;
95 av_set_pts_info(ast, 32, 1, st->time_base.den);
96 }
97
98 avio_read(s->pb, filename, 257);
99 filename[sizeof(filename)-1] = 0;
100 av_metadata_set2(&st->metadata, "filename", filename, 0);
101
102 av_dlog(s, "filename %s\n", filename);
103 av_dlog(s, "resolution %dx%d\n", st->codec->width, st->codec->height);
104 av_dlog(s, "timescale %d\n", st->time_base.den);
105 av_dlog(s, "frame rate %d/%d\n",
106 st->codec->time_base.num, st->codec->time_base.den);
107
108 return 0;
109 }
110
111 static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
112 {
113 R3DContext *r3d = s->priv_data;
114 AVStream *st = s->streams[0];
115 int i;
116
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);
121
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;
126 break;
127 }
128 av_dlog(s, "video offset %d: %#x\n", i, r3d->video_offsets[i]);
129 }
130
131 if (st->codec->time_base.den)
132 st->duration = (uint64_t)r3d->video_offsets_count*
133 st->time_base.den*st->codec->time_base.num/st->codec->time_base.den;
134 av_dlog(s, "duration %lld\n", st->duration);
135
136 return 0;
137 }
138
139 static void r3d_read_reos(AVFormatContext *s)
140 {
141 R3DContext *r3d = s->priv_data;
142 int tmp;
143
144 r3d->rdvo_offset = avio_rb32(s->pb);
145 avio_rb32(s->pb); // rdvs offset
146 avio_rb32(s->pb); // rdao offset
147 avio_rb32(s->pb); // rdas offset
148
149 tmp = avio_rb32(s->pb);
150 av_dlog(s, "num video chunks %d\n", tmp);
151
152 tmp = avio_rb32(s->pb);
153 av_dlog(s, "num audio chunks %d\n", tmp);
154
155 url_fskip(s->pb, 6*4);
156 }
157
158 static int r3d_read_header(AVFormatContext *s, AVFormatParameters *ap)
159 {
160 R3DContext *r3d = s->priv_data;
161 Atom atom;
162 int ret;
163
164 if (read_atom(s, &atom) < 0) {
165 av_log(s, AV_LOG_ERROR, "error reading atom\n");
166 return -1;
167 }
168 if (atom.tag == MKTAG('R','E','D','1')) {
169 if ((ret = r3d_read_red1(s)) < 0) {
170 av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
171 return ret;
172 }
173 } else {
174 av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
175 return -1;
176 }
177
178 s->data_offset = url_ftell(s->pb);
179 av_dlog(s, "data offset %#llx\n", s->data_offset);
180 if (url_is_streamed(s->pb))
181 return 0;
182 // find REOB/REOF/REOS to load index
183 url_fseek(s->pb, url_fsize(s->pb)-48-8, SEEK_SET);
184 if (read_atom(s, &atom) < 0)
185 av_log(s, AV_LOG_ERROR, "error reading end atom\n");
186
187 if (atom.tag != MKTAG('R','E','O','B') &&
188 atom.tag != MKTAG('R','E','O','F') &&
189 atom.tag != MKTAG('R','E','O','S'))
190 goto out;
191
192 r3d_read_reos(s);
193
194 if (r3d->rdvo_offset) {
195 url_fseek(s->pb, r3d->rdvo_offset, SEEK_SET);
196 if (read_atom(s, &atom) < 0)
197 av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
198 if (atom.tag == MKTAG('R','D','V','O')) {
199 if (r3d_read_rdvo(s, &atom) < 0)
200 av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
201 }
202 }
203
204 out:
205 url_fseek(s->pb, s->data_offset, SEEK_SET);
206 return 0;
207 }
208
209 static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
210 {
211 AVStream *st = s->streams[0];
212 int tmp, tmp2;
213 uint64_t pos = url_ftell(s->pb);
214 unsigned dts;
215 int ret;
216
217 dts = avio_rb32(s->pb);
218
219 tmp = avio_rb32(s->pb);
220 av_dlog(s, "frame num %d\n", tmp);
221
222 tmp = avio_r8(s->pb); // major version
223 tmp2 = avio_r8(s->pb); // minor version
224 av_dlog(s, "version %d.%d\n", tmp, tmp2);
225
226 tmp = avio_rb16(s->pb); // unknown
227 av_dlog(s, "unknown %d\n", tmp);
228
229 if (tmp > 4) {
230 tmp = avio_rb16(s->pb); // unknown
231 av_dlog(s, "unknown %d\n", tmp);
232
233 tmp = avio_rb16(s->pb); // unknown
234 av_dlog(s, "unknown %d\n", tmp);
235
236 tmp = avio_rb32(s->pb);
237 av_dlog(s, "width %d\n", tmp);
238 tmp = avio_rb32(s->pb);
239 av_dlog(s, "height %d\n", tmp);
240
241 tmp = avio_rb32(s->pb);
242 av_dlog(s, "metadata len %d\n", tmp);
243 }
244 tmp = atom->size - 8 - (url_ftell(s->pb) - pos);
245 if (tmp < 0)
246 return -1;
247 ret = av_get_packet(s->pb, pkt, tmp);
248 if (ret < 0) {
249 av_log(s, AV_LOG_ERROR, "error reading video packet\n");
250 return -1;
251 }
252
253 pkt->stream_index = 0;
254 pkt->dts = dts;
255 if (st->codec->time_base.den)
256 pkt->duration = (uint64_t)st->time_base.den*
257 st->codec->time_base.num/st->codec->time_base.den;
258 av_dlog(s, "pkt dts %lld duration %d\n", pkt->dts, pkt->duration);
259
260 return 0;
261 }
262
263 static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
264 {
265 AVStream *st = s->streams[1];
266 int tmp, tmp2, samples, size;
267 uint64_t pos = url_ftell(s->pb);
268 unsigned dts;
269 int ret;
270
271 dts = avio_rb32(s->pb);
272
273 st->codec->sample_rate = avio_rb32(s->pb);
274
275 samples = avio_rb32(s->pb);
276
277 tmp = avio_rb32(s->pb);
278 av_dlog(s, "packet num %d\n", tmp);
279
280 tmp = avio_rb16(s->pb); // unkown
281 av_dlog(s, "unknown %d\n", tmp);
282
283 tmp = avio_r8(s->pb); // major version
284 tmp2 = avio_r8(s->pb); // minor version
285 av_dlog(s, "version %d.%d\n", tmp, tmp2);
286
287 tmp = avio_rb32(s->pb); // unknown
288 av_dlog(s, "unknown %d\n", tmp);
289
290 size = atom->size - 8 - (url_ftell(s->pb) - pos);
291 if (size < 0)
292 return -1;
293 ret = av_get_packet(s->pb, pkt, size);
294 if (ret < 0) {
295 av_log(s, AV_LOG_ERROR, "error reading audio packet\n");
296 return ret;
297 }
298
299 pkt->stream_index = 1;
300 pkt->dts = dts;
301 pkt->duration = av_rescale(samples, st->time_base.den, st->codec->sample_rate);
302 av_dlog(s, "pkt dts %lld duration %d samples %d sample rate %d\n",
303 pkt->dts, pkt->duration, samples, st->codec->sample_rate);
304
305 return 0;
306 }
307
308 static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
309 {
310 Atom atom;
311 int err = 0;
312
313 while (!err) {
314 if (read_atom(s, &atom) < 0) {
315 err = -1;
316 break;
317 }
318 switch (atom.tag) {
319 case MKTAG('R','E','D','V'):
320 if (s->streams[0]->discard == AVDISCARD_ALL)
321 goto skip;
322 if (!(err = r3d_read_redv(s, pkt, &atom)))
323 return 0;
324 break;
325 case MKTAG('R','E','D','A'):
326 if (s->nb_streams < 2)
327 return -1;
328 if (s->streams[1]->discard == AVDISCARD_ALL)
329 goto skip;
330 if (!(err = r3d_read_reda(s, pkt, &atom)))
331 return 0;
332 break;
333 default:
334 skip:
335 url_fskip(s->pb, atom.size-8);
336 }
337 }
338 return err;
339 }
340
341 static int r3d_probe(AVProbeData *p)
342 {
343 if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
344 return AVPROBE_SCORE_MAX;
345 return 0;
346 }
347
348 static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
349 {
350 AVStream *st = s->streams[0]; // video stream
351 R3DContext *r3d = s->priv_data;
352 int frame_num;
353
354 if (!st->codec->time_base.num || !st->time_base.den)
355 return -1;
356
357 frame_num = sample_time*st->codec->time_base.den/
358 ((int64_t)st->codec->time_base.num*st->time_base.den);
359 av_dlog(s, "seek frame num %d timestamp %lld\n", frame_num, sample_time);
360
361 if (frame_num < r3d->video_offsets_count) {
362 url_fseek(s->pb, r3d->video_offsets_count, SEEK_SET);
363 } else {
364 av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
365 return -1;
366 }
367
368 return 0;
369 }
370
371 static int r3d_close(AVFormatContext *s)
372 {
373 R3DContext *r3d = s->priv_data;
374
375 av_freep(&r3d->video_offsets);
376
377 return 0;
378 }
379
380 AVInputFormat ff_r3d_demuxer = {
381 "r3d",
382 NULL_IF_CONFIG_SMALL("REDCODE R3D format"),
383 sizeof(R3DContext),
384 r3d_probe,
385 r3d_read_header,
386 r3d_read_packet,
387 r3d_close,
388 r3d_seek,
389 };