libdts support by (Benjamin Zores <ben at geexbox dot org>)
[libav.git] / libavformat / raw.c
CommitLineData
de6d9b64
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1/*
2 * RAW encoder and decoder
19720f15 3 * Copyright (c) 2001 Fabrice Bellard.
de6d9b64 4 *
19720f15
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5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
de6d9b64 9 *
19720f15 10 * This library is distributed in the hope that it will be useful,
de6d9b64 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19720f15
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
de6d9b64 14 *
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15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
de6d9b64 18 */
de6d9b64
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19#include "avformat.h"
20
764ef400 21#ifdef CONFIG_ENCODERS
de6d9b64 22/* simple formats */
5c91a675 23static int raw_write_header(struct AVFormatContext *s)
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24{
25 return 0;
26}
27
e928649b 28static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
de6d9b64 29{
e928649b 30 put_buffer(&s->pb, pkt->data, pkt->size);
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31 put_flush_packet(&s->pb);
32 return 0;
33}
34
5c91a675 35static int raw_write_trailer(struct AVFormatContext *s)
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36{
37 return 0;
38}
764ef400 39#endif //CONFIG_ENCODERS
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40
41/* raw input */
0c1a9eda 42static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
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43{
44 AVStream *st;
c9a65ca8 45 int id;
de6d9b64 46
c9a65ca8 47 st = av_new_stream(s, 0);
de6d9b64 48 if (!st)
c9a65ca8 49 return AVERROR_NOMEM;
de6d9b64 50 if (ap) {
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51 id = s->iformat->value;
52 if (id == CODEC_ID_RAWVIDEO) {
de6d9b64 53 st->codec.codec_type = CODEC_TYPE_VIDEO;
de6d9b64 54 } else {
c9a65ca8 55 st->codec.codec_type = CODEC_TYPE_AUDIO;
de6d9b64 56 }
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57 st->codec.codec_id = id;
58
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59 switch(st->codec.codec_type) {
60 case CODEC_TYPE_AUDIO:
61 st->codec.sample_rate = ap->sample_rate;
62 st->codec.channels = ap->channels;
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63 break;
64 case CODEC_TYPE_VIDEO:
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65 st->codec.frame_rate = ap->frame_rate;
66 st->codec.frame_rate_base = ap->frame_rate_base;
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67 st->codec.width = ap->width;
68 st->codec.height = ap->height;
63167088 69 st->codec.pix_fmt = ap->pix_fmt;
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70 break;
71 default:
27e084bd 72 return -1;
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73 }
74 } else {
27e084bd 75 return -1;
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76 }
77 return 0;
78}
79
2e93e3aa 80#define RAW_PACKET_SIZE 1024
de6d9b64 81
5c91a675 82static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
de6d9b64 83{
7866eeff 84 int ret, size;
2a6874fd 85 // AVStream *st = s->streams[0];
7866eeff 86
231dd3f3 87 size= RAW_PACKET_SIZE;
de6d9b64 88
7866eeff 89 if (av_new_packet(pkt, size) < 0)
0bd586c5 90 return AVERROR_IO;
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91
92 pkt->stream_index = 0;
7866eeff 93 ret = get_buffer(&s->pb, pkt->data, size);
2e93e3aa 94 if (ret <= 0) {
de6d9b64 95 av_free_packet(pkt);
0bd586c5 96 return AVERROR_IO;
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97 }
98 /* note: we need to modify the packet size here to handle the last
99 packet */
100 pkt->size = ret;
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101 return ret;
102}
103
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104static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
105{
106 int ret, size;
107
108 size = RAW_PACKET_SIZE;
109
110 if (av_new_packet(pkt, size) < 0)
0bd586c5 111 return AVERROR_IO;
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112
113 pkt->stream_index = 0;
114 ret = get_partial_buffer(&s->pb, pkt->data, size);
115 if (ret <= 0) {
116 av_free_packet(pkt);
0bd586c5 117 return AVERROR_IO;
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118 }
119 pkt->size = ret;
120 return ret;
121}
122
5c91a675 123static int raw_read_close(AVFormatContext *s)
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124{
125 return 0;
126}
127
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128int pcm_read_seek(AVFormatContext *s,
129 int stream_index, int64_t timestamp)
130{
131 AVStream *st;
132 int block_align, byte_rate;
133 int64_t pos;
134
135 st = s->streams[0];
136 switch(st->codec.codec_id) {
137 case CODEC_ID_PCM_S16LE:
138 case CODEC_ID_PCM_S16BE:
139 case CODEC_ID_PCM_U16LE:
140 case CODEC_ID_PCM_U16BE:
141 block_align = 2 * st->codec.channels;
142 byte_rate = block_align * st->codec.sample_rate;
143 break;
144 case CODEC_ID_PCM_S8:
145 case CODEC_ID_PCM_U8:
146 case CODEC_ID_PCM_MULAW:
147 case CODEC_ID_PCM_ALAW:
148 block_align = st->codec.channels;
149 byte_rate = block_align * st->codec.sample_rate;
150 break;
151 default:
152 block_align = st->codec.block_align;
153 byte_rate = st->codec.bit_rate / 8;
154 break;
155 }
156
157 if (block_align <= 0 || byte_rate <= 0)
158 return -1;
159
160 /* compute the position by aligning it to block_align */
cdd5034f 161 pos = av_rescale(timestamp * byte_rate, st->time_base.num, st->time_base.den);
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162 pos = (pos / block_align) * block_align;
163
164 /* recompute exact position */
77405fc8 165 st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
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166 url_fseek(&s->pb, pos + s->data_offset, SEEK_SET);
167 return 0;
168}
169
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170/* ac3 read */
171static int ac3_read_header(AVFormatContext *s,
172 AVFormatParameters *ap)
173{
174 AVStream *st;
175
176 st = av_new_stream(s, 0);
177 if (!st)
178 return AVERROR_NOMEM;
179
180 st->codec.codec_type = CODEC_TYPE_AUDIO;
181 st->codec.codec_id = CODEC_ID_AC3;
4986a429 182 st->need_parsing = 1;
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183 /* the parameters will be extracted from the compressed bitstream */
184 return 0;
185}
186
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187/* dts read */
188static int dts_read_header(AVFormatContext *s,
189 AVFormatParameters *ap)
190{
191 AVStream *st;
192
193 st = av_new_stream(s, 0);
194 if (!st)
195 return AVERROR_NOMEM;
196
197 st->codec.codec_type = CODEC_TYPE_AUDIO;
198 st->codec.codec_id = CODEC_ID_DTS;
199 st->need_parsing = 1;
200 /* the parameters will be extracted from the compressed bitstream */
201 return 0;
202}
203
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204/* mpeg1/h263 input */
205static int video_read_header(AVFormatContext *s,
206 AVFormatParameters *ap)
207{
208 AVStream *st;
209
c9a65ca8 210 st = av_new_stream(s, 0);
de6d9b64 211 if (!st)
c9a65ca8 212 return AVERROR_NOMEM;
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213
214 st->codec.codec_type = CODEC_TYPE_VIDEO;
c9a65ca8 215 st->codec.codec_id = s->iformat->value;
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216 st->need_parsing = 1;
217
27e084bd 218 /* for mjpeg, specify frame rate */
7866eeff 219 /* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/
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220 if (st->codec.codec_id == CODEC_ID_MJPEG ||
221 st->codec.codec_id == CODEC_ID_MPEG4) {
222 if (ap && ap->frame_rate) {
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223 st->codec.frame_rate = ap->frame_rate;
224 st->codec.frame_rate_base = ap->frame_rate_base;
27e084bd 225 } else {
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226 st->codec.frame_rate = 25;
227 st->codec.frame_rate_base = 1;
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228 }
229 }
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230 return 0;
231}
232
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233#define SEQ_START_CODE 0x000001b3
234#define GOP_START_CODE 0x000001b8
235#define PICTURE_START_CODE 0x00000100
236
237/* XXX: improve that by looking at several start codes */
238static int mpegvideo_probe(AVProbeData *p)
239{
fa777321
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240 int code;
241 const uint8_t *d;
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242
243 /* we search the first start code. If it is a sequence, gop or
244 picture start code then we decide it is an mpeg video
245 stream. We do not send highest value to give a chance to mpegts */
fa777321
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246 /* NOTE: the search range was restricted to avoid too many false
247 detections */
248
249 if (p->buf_size < 6)
250 return 0;
251 d = p->buf;
252 code = (d[0] << 24) | (d[1] << 16) | (d[2] << 8) | (d[3]);
253 if ((code & 0xffffff00) == 0x100) {
254 if (code == SEQ_START_CODE ||
255 code == GOP_START_CODE ||
256 code == PICTURE_START_CODE)
257 return 50 - 1;
258 else
259 return 0;
c9a65ca8
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260 }
261 return 0;
262}
263
d07f9043
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264static int h263_probe(AVProbeData *p)
265{
266 int code;
267 const uint8_t *d;
268
269 if (p->buf_size < 6)
270 return 0;
271 d = p->buf;
272 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
273 if (code == 0x20) {
274 return 50;
275 }
276 return 0;
277}
278
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279static int h261_probe(AVProbeData *p)
280{
281 int code;
282 const uint8_t *d;
283
284 if (p->buf_size < 6)
285 return 0;
286 d = p->buf;
287 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
288 if (code == 0x10) {
289 return 50;
290 }
291 return 0;
292}
293
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294AVInputFormat ac3_iformat = {
295 "ac3",
296 "raw ac3",
297 0,
298 NULL,
cd66005d 299 ac3_read_header,
e15dec10 300 raw_read_partial_packet,
de6d9b64 301 raw_read_close,
bb76a117 302 .extensions = "ac3",
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303};
304
764ef400 305#ifdef CONFIG_ENCODERS
c9a65ca8 306AVOutputFormat ac3_oformat = {
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307 "ac3",
308 "raw ac3",
309 "audio/x-ac3",
310 "ac3",
c9a65ca8 311 0,
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312 CODEC_ID_AC3,
313 0,
314 raw_write_header,
315 raw_write_packet,
316 raw_write_trailer,
317};
764ef400 318#endif //CONFIG_ENCODERS
de6d9b64 319
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320AVInputFormat dts_iformat = {
321 "dts",
322 "raw dts",
323 0,
324 NULL,
325 dts_read_header,
326 raw_read_partial_packet,
327 raw_read_close,
328 .extensions = "dts",
329};
330
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331AVInputFormat h261_iformat = {
332 "h261",
333 "raw h261",
334 0,
335 h261_probe,
336 video_read_header,
337 raw_read_partial_packet,
338 raw_read_close,
339 .extensions = "h261",
340 .value = CODEC_ID_H261,
341};
342
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343AVInputFormat h263_iformat = {
344 "h263",
345 "raw h263",
346 0,
347 h263_probe,
348 video_read_header,
e15dec10 349 raw_read_partial_packet,
d07f9043
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350 raw_read_close,
351// .extensions = "h263", //FIXME remove after writing mpeg4_probe
352 .value = CODEC_ID_H263,
353};
354
764ef400 355#ifdef CONFIG_ENCODERS
c9a65ca8 356AVOutputFormat h263_oformat = {
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357 "h263",
358 "raw h263",
359 "video/x-h263",
360 "h263",
361 0,
c9a65ca8 362 0,
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363 CODEC_ID_H263,
364 raw_write_header,
365 raw_write_packet,
366 raw_write_trailer,
c9a65ca8 367};
764ef400 368#endif //CONFIG_ENCODERS
c9a65ca8 369
7866eeff
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370AVInputFormat m4v_iformat = {
371 "m4v",
372 "raw MPEG4 video format",
373 0,
2f0f5b20 374 NULL /*mpegvideo_probe*/,
7866eeff 375 video_read_header,
e15dec10 376 raw_read_partial_packet,
7866eeff 377 raw_read_close,
bb76a117
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378 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
379 .value = CODEC_ID_MPEG4,
7866eeff
MN
380};
381
764ef400 382#ifdef CONFIG_ENCODERS
89b3d7c9
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383AVOutputFormat m4v_oformat = {
384 "m4v",
385 "raw MPEG4 video format",
386 NULL,
387 "m4v",
388 0,
389 CODEC_ID_NONE,
390 CODEC_ID_MPEG4,
391 raw_write_header,
392 raw_write_packet,
393 raw_write_trailer,
394};
764ef400 395#endif //CONFIG_ENCODERS
89b3d7c9 396
0da71265
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397AVInputFormat h264_iformat = {
398 "h264",
399 "raw H264 video format",
400 0,
401 NULL /*mpegvideo_probe*/,
402 video_read_header,
e15dec10 403 raw_read_partial_packet,
0da71265
MN
404 raw_read_close,
405 .extensions = "h26l,h264", //FIXME remove after writing mpeg4_probe
406 .value = CODEC_ID_H264,
407};
408
764ef400 409#ifdef CONFIG_ENCODERS
0da71265
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410AVOutputFormat h264_oformat = {
411 "h264",
412 "raw H264 video format",
413 NULL,
414 "h264",
415 0,
416 CODEC_ID_NONE,
417 CODEC_ID_H264,
418 raw_write_header,
419 raw_write_packet,
420 raw_write_trailer,
421};
764ef400 422#endif //CONFIG_ENCODERS
0da71265 423
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424AVInputFormat mpegvideo_iformat = {
425 "mpegvideo",
426 "MPEG video",
427 0,
428 mpegvideo_probe,
de6d9b64 429 video_read_header,
e15dec10 430 raw_read_partial_packet,
de6d9b64 431 raw_read_close,
bb76a117 432 .value = CODEC_ID_MPEG1VIDEO,
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433};
434
764ef400 435#ifdef CONFIG_ENCODERS
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436AVOutputFormat mpeg1video_oformat = {
437 "mpeg1video",
de6d9b64
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438 "MPEG video",
439 "video/x-mpeg",
440 "mpg,mpeg",
441 0,
c9a65ca8 442 0,
de6d9b64
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443 CODEC_ID_MPEG1VIDEO,
444 raw_write_header,
445 raw_write_packet,
446 raw_write_trailer,
de6d9b64 447};
764ef400 448#endif //CONFIG_ENCODERS
de6d9b64 449
c9a65ca8 450AVInputFormat mjpeg_iformat = {
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451 "mjpeg",
452 "MJPEG video",
27e084bd 453 0,
c9a65ca8 454 NULL,
27e084bd 455 video_read_header,
e15dec10 456 raw_read_partial_packet,
27e084bd 457 raw_read_close,
bb76a117
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458 .extensions = "mjpg,mjpeg",
459 .value = CODEC_ID_MJPEG,
27e084bd
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460};
461
764ef400 462#ifdef CONFIG_ENCODERS
c9a65ca8
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463AVOutputFormat mjpeg_oformat = {
464 "mjpeg",
465 "MJPEG video",
466 "video/x-mjpeg",
467 "mjpg,mjpeg",
5ed8fafc 468 0,
5ed8fafc 469 0,
c9a65ca8 470 CODEC_ID_MJPEG,
5ed8fafc
FB
471 raw_write_header,
472 raw_write_packet,
473 raw_write_trailer,
5ed8fafc 474};
764ef400 475#endif //CONFIG_ENCODERS
5ed8fafc 476
c9a65ca8 477/* pcm formats */
764ef400 478
4986a429 479#define PCMINPUTDEF(name, long_name, ext, codec) \
764ef400
MM
480AVInputFormat pcm_ ## name ## _iformat = {\
481 #name,\
482 long_name,\
483 0,\
484 NULL,\
485 raw_read_header,\
486 raw_read_packet,\
487 raw_read_close,\
4986a429 488 pcm_read_seek,\
764ef400
MM
489 .extensions = ext,\
490 .value = codec,\
491};
492
4986a429
FB
493#if !defined(CONFIG_ENCODERS) && defined(CONFIG_DECODERS)
494
495#define PCMDEF(name, long_name, ext, codec) \
496 PCMINPUTDEF(name, long_name, ext, codec)
497
764ef400 498#else
5ed8fafc 499
c9a65ca8 500#define PCMDEF(name, long_name, ext, codec) \
4986a429 501 PCMINPUTDEF(name, long_name, ext, codec)\
c9a65ca8
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502\
503AVOutputFormat pcm_ ## name ## _oformat = {\
504 #name,\
505 long_name,\
506 NULL,\
507 ext,\
508 0,\
509 codec,\
510 0,\
511 raw_write_header,\
512 raw_write_packet,\
513 raw_write_trailer,\
5ed8fafc 514};
764ef400 515#endif //CONFIG_ENCODERS
5ed8fafc 516
5ed8fafc 517#ifdef WORDS_BIGENDIAN
c9a65ca8
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518#define BE_DEF(s) s
519#define LE_DEF(s) NULL
5ed8fafc 520#else
c9a65ca8
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521#define BE_DEF(s) NULL
522#define LE_DEF(s) s
5ed8fafc 523#endif
5ed8fafc 524
5ed8fafc 525
c9a65ca8
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526PCMDEF(s16le, "pcm signed 16 bit little endian format",
527 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
5ed8fafc 528
c9a65ca8
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529PCMDEF(s16be, "pcm signed 16 bit big endian format",
530 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
5ed8fafc 531
c9a65ca8
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532PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
533 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
5ed8fafc 534
c9a65ca8
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535PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
536 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
5ed8fafc 537
c9a65ca8
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538PCMDEF(s8, "pcm signed 8 bit format",
539 "sb", CODEC_ID_PCM_S8)
5ed8fafc 540
c9a65ca8
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541PCMDEF(u8, "pcm unsigned 8 bit format",
542 "ub", CODEC_ID_PCM_U8)
5ed8fafc 543
c9a65ca8
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544PCMDEF(mulaw, "pcm mu law format",
545 "ul", CODEC_ID_PCM_MULAW)
de6d9b64 546
c9a65ca8
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547PCMDEF(alaw, "pcm A law format",
548 "al", CODEC_ID_PCM_ALAW)
de6d9b64 549
5c91a675 550static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
de6d9b64
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551{
552 int packet_size, ret, width, height;
553 AVStream *st = s->streams[0];
554
555 width = st->codec.width;
556 height = st->codec.height;
557
63167088
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558 packet_size = avpicture_get_size(st->codec.pix_fmt, width, height);
559 if (packet_size < 0)
42343f7e 560 av_abort();
de6d9b64
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561
562 if (av_new_packet(pkt, packet_size) < 0)
0bd586c5 563 return AVERROR_IO;
de6d9b64
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564
565 pkt->stream_index = 0;
c2c2cd2d 566#if 0
de6d9b64
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567 /* bypass buffered I/O */
568 ret = url_read(url_fileno(&s->pb), pkt->data, pkt->size);
c2c2cd2d
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569#else
570 ret = get_buffer(&s->pb, pkt->data, pkt->size);
571#endif
de6d9b64
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572 if (ret != pkt->size) {
573 av_free_packet(pkt);
0bd586c5 574 return AVERROR_IO;
de6d9b64
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575 } else {
576 return 0;
577 }
578}
579
c9a65ca8
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580AVInputFormat rawvideo_iformat = {
581 "rawvideo",
582 "raw video format",
583 0,
584 NULL,
585 raw_read_header,
586 rawvideo_read_packet,
587 raw_read_close,
bb76a117
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588 .extensions = "yuv",
589 .value = CODEC_ID_RAWVIDEO,
c9a65ca8
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590};
591
764ef400 592#ifdef CONFIG_ENCODERS
c9a65ca8 593AVOutputFormat rawvideo_oformat = {
de6d9b64
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594 "rawvideo",
595 "raw video format",
596 NULL,
597 "yuv",
c9a65ca8 598 0,
de6d9b64
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599 CODEC_ID_NONE,
600 CODEC_ID_RAWVIDEO,
601 raw_write_header,
602 raw_write_packet,
603 raw_write_trailer,
de6d9b64 604};
764ef400 605#endif //CONFIG_ENCODERS
c9a65ca8 606
764ef400 607#ifdef CONFIG_ENCODERS
e928649b 608static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
87bdd3e5
FB
609{
610 return 0;
611}
612
613AVOutputFormat null_oformat = {
614 "null",
615 "null video format",
616 NULL,
617 NULL,
618 0,
619#ifdef WORDS_BIGENDIAN
620 CODEC_ID_PCM_S16BE,
621#else
622 CODEC_ID_PCM_S16LE,
623#endif
624 CODEC_ID_RAWVIDEO,
625 raw_write_header,
626 null_write_packet,
627 raw_write_trailer,
b1d89f82 628 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE,
87bdd3e5 629};
764ef400
MM
630#endif //CONFIG_ENCODERS
631
632#ifndef CONFIG_ENCODERS
633#define av_register_output_format(format)
634#endif
635#ifndef CONFIG_DECODERS
636#define av_register_input_format(format)
637#endif
87bdd3e5 638
c9a65ca8
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639int raw_init(void)
640{
c9a65ca8
FB
641 av_register_input_format(&ac3_iformat);
642 av_register_output_format(&ac3_oformat);
643
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644 av_register_input_format(&dts_iformat);
645
c6148de2
MN
646 av_register_input_format(&h261_iformat);
647
d07f9043 648 av_register_input_format(&h263_iformat);
c9a65ca8 649 av_register_output_format(&h263_oformat);
89b3d7c9 650
7866eeff 651 av_register_input_format(&m4v_iformat);
89b3d7c9 652 av_register_output_format(&m4v_oformat);
0da71265
MN
653
654 av_register_input_format(&h264_iformat);
655 av_register_output_format(&h264_oformat);
c9a65ca8
FB
656
657 av_register_input_format(&mpegvideo_iformat);
658 av_register_output_format(&mpeg1video_oformat);
659
660 av_register_input_format(&mjpeg_iformat);
661 av_register_output_format(&mjpeg_oformat);
662
663 av_register_input_format(&pcm_s16le_iformat);
664 av_register_output_format(&pcm_s16le_oformat);
665 av_register_input_format(&pcm_s16be_iformat);
666 av_register_output_format(&pcm_s16be_oformat);
667 av_register_input_format(&pcm_u16le_iformat);
668 av_register_output_format(&pcm_u16le_oformat);
669 av_register_input_format(&pcm_u16be_iformat);
670 av_register_output_format(&pcm_u16be_oformat);
671 av_register_input_format(&pcm_s8_iformat);
672 av_register_output_format(&pcm_s8_oformat);
673 av_register_input_format(&pcm_u8_iformat);
674 av_register_output_format(&pcm_u8_oformat);
675 av_register_input_format(&pcm_mulaw_iformat);
676 av_register_output_format(&pcm_mulaw_oformat);
677 av_register_input_format(&pcm_alaw_iformat);
678 av_register_output_format(&pcm_alaw_oformat);
679
680 av_register_input_format(&rawvideo_iformat);
681 av_register_output_format(&rawvideo_oformat);
87bdd3e5
FB
682
683 av_register_output_format(&null_oformat);
c9a65ca8
FB
684 return 0;
685}