100l (forgoten seeking functions)
[libav.git] / libavformat / raw.c
1 /*
2 * RAW encoder and decoder
3 * Copyright (c) 2001 Fabrice Bellard.
4 *
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.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
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
18 */
19 #include "avformat.h"
20
21 #ifdef CONFIG_ENCODERS
22 /* simple formats */
23 static int raw_write_header(struct AVFormatContext *s)
24 {
25 return 0;
26 }
27
28 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
29 {
30 put_buffer(&s->pb, pkt->data, pkt->size);
31 put_flush_packet(&s->pb);
32 return 0;
33 }
34
35 static int raw_write_trailer(struct AVFormatContext *s)
36 {
37 return 0;
38 }
39 #endif //CONFIG_ENCODERS
40
41 /* raw input */
42 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
43 {
44 AVStream *st;
45 int id;
46
47 st = av_new_stream(s, 0);
48 if (!st)
49 return AVERROR_NOMEM;
50 if (ap) {
51 id = s->iformat->value;
52 if (id == CODEC_ID_RAWVIDEO) {
53 st->codec.codec_type = CODEC_TYPE_VIDEO;
54 } else {
55 st->codec.codec_type = CODEC_TYPE_AUDIO;
56 }
57 st->codec.codec_id = id;
58
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;
63 break;
64 case CODEC_TYPE_VIDEO:
65 st->codec.frame_rate = ap->frame_rate;
66 st->codec.frame_rate_base = ap->frame_rate_base;
67 st->codec.width = ap->width;
68 st->codec.height = ap->height;
69 st->codec.pix_fmt = ap->pix_fmt;
70 break;
71 default:
72 return -1;
73 }
74 } else {
75 return -1;
76 }
77 return 0;
78 }
79
80 #define RAW_PACKET_SIZE 1024
81
82 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
83 {
84 int ret, size;
85 // AVStream *st = s->streams[0];
86
87 size= RAW_PACKET_SIZE;
88
89 if (av_new_packet(pkt, size) < 0)
90 return AVERROR_IO;
91
92 pkt->stream_index = 0;
93 ret = get_buffer(&s->pb, pkt->data, size);
94 if (ret <= 0) {
95 av_free_packet(pkt);
96 return AVERROR_IO;
97 }
98 /* note: we need to modify the packet size here to handle the last
99 packet */
100 pkt->size = ret;
101 return ret;
102 }
103
104 static 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)
111 return AVERROR_IO;
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);
117 return AVERROR_IO;
118 }
119 pkt->size = ret;
120 return ret;
121 }
122
123 static int raw_read_close(AVFormatContext *s)
124 {
125 return 0;
126 }
127
128 int pcm_read_seek(AVFormatContext *s,
129 int stream_index, int64_t timestamp, int flags)
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 */
161 pos = av_rescale_rnd(timestamp * byte_rate,
162 st->time_base.num,
163 st->time_base.den * (int64_t)block_align,
164 (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
165 pos *= block_align;
166
167 /* recompute exact position */
168 st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
169 url_fseek(&s->pb, pos + s->data_offset, SEEK_SET);
170 return 0;
171 }
172
173 /* ac3 read */
174 static int ac3_read_header(AVFormatContext *s,
175 AVFormatParameters *ap)
176 {
177 AVStream *st;
178
179 st = av_new_stream(s, 0);
180 if (!st)
181 return AVERROR_NOMEM;
182
183 st->codec.codec_type = CODEC_TYPE_AUDIO;
184 st->codec.codec_id = CODEC_ID_AC3;
185 st->need_parsing = 1;
186 /* the parameters will be extracted from the compressed bitstream */
187 return 0;
188 }
189
190 /* dts read */
191 static int dts_read_header(AVFormatContext *s,
192 AVFormatParameters *ap)
193 {
194 AVStream *st;
195
196 st = av_new_stream(s, 0);
197 if (!st)
198 return AVERROR_NOMEM;
199
200 st->codec.codec_type = CODEC_TYPE_AUDIO;
201 st->codec.codec_id = CODEC_ID_DTS;
202 st->need_parsing = 1;
203 /* the parameters will be extracted from the compressed bitstream */
204 return 0;
205 }
206
207 /* mpeg1/h263 input */
208 static int video_read_header(AVFormatContext *s,
209 AVFormatParameters *ap)
210 {
211 AVStream *st;
212
213 st = av_new_stream(s, 0);
214 if (!st)
215 return AVERROR_NOMEM;
216
217 st->codec.codec_type = CODEC_TYPE_VIDEO;
218 st->codec.codec_id = s->iformat->value;
219 st->need_parsing = 1;
220
221 /* for mjpeg, specify frame rate */
222 /* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/
223 if (st->codec.codec_id == CODEC_ID_MJPEG ||
224 st->codec.codec_id == CODEC_ID_MPEG4) {
225 if (ap && ap->frame_rate) {
226 st->codec.frame_rate = ap->frame_rate;
227 st->codec.frame_rate_base = ap->frame_rate_base;
228 } else {
229 st->codec.frame_rate = 25;
230 st->codec.frame_rate_base = 1;
231 }
232 }
233 return 0;
234 }
235
236 #define SEQ_START_CODE 0x000001b3
237 #define GOP_START_CODE 0x000001b8
238 #define PICTURE_START_CODE 0x00000100
239
240 /* XXX: improve that by looking at several start codes */
241 static int mpegvideo_probe(AVProbeData *p)
242 {
243 int code;
244 const uint8_t *d;
245
246 /* we search the first start code. If it is a sequence, gop or
247 picture start code then we decide it is an mpeg video
248 stream. We do not send highest value to give a chance to mpegts */
249 /* NOTE: the search range was restricted to avoid too many false
250 detections */
251
252 if (p->buf_size < 6)
253 return 0;
254 d = p->buf;
255 code = (d[0] << 24) | (d[1] << 16) | (d[2] << 8) | (d[3]);
256 if ((code & 0xffffff00) == 0x100) {
257 if (code == SEQ_START_CODE ||
258 code == GOP_START_CODE ||
259 code == PICTURE_START_CODE)
260 return 50 - 1;
261 else
262 return 0;
263 }
264 return 0;
265 }
266
267 static int h263_probe(AVProbeData *p)
268 {
269 int code;
270 const uint8_t *d;
271
272 if (p->buf_size < 6)
273 return 0;
274 d = p->buf;
275 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
276 if (code == 0x20) {
277 return 50;
278 }
279 return 0;
280 }
281
282 static int h261_probe(AVProbeData *p)
283 {
284 int code;
285 const uint8_t *d;
286
287 if (p->buf_size < 6)
288 return 0;
289 d = p->buf;
290 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
291 if (code == 0x10) {
292 return 50;
293 }
294 return 0;
295 }
296
297 AVInputFormat ac3_iformat = {
298 "ac3",
299 "raw ac3",
300 0,
301 NULL,
302 ac3_read_header,
303 raw_read_partial_packet,
304 raw_read_close,
305 .extensions = "ac3",
306 };
307
308 #ifdef CONFIG_ENCODERS
309 AVOutputFormat ac3_oformat = {
310 "ac3",
311 "raw ac3",
312 "audio/x-ac3",
313 "ac3",
314 0,
315 CODEC_ID_AC3,
316 0,
317 raw_write_header,
318 raw_write_packet,
319 raw_write_trailer,
320 };
321 #endif //CONFIG_ENCODERS
322
323 AVInputFormat dts_iformat = {
324 "dts",
325 "raw dts",
326 0,
327 NULL,
328 dts_read_header,
329 raw_read_partial_packet,
330 raw_read_close,
331 .extensions = "dts",
332 };
333
334 AVInputFormat h261_iformat = {
335 "h261",
336 "raw h261",
337 0,
338 h261_probe,
339 video_read_header,
340 raw_read_partial_packet,
341 raw_read_close,
342 .extensions = "h261",
343 .value = CODEC_ID_H261,
344 };
345
346 AVInputFormat h263_iformat = {
347 "h263",
348 "raw h263",
349 0,
350 h263_probe,
351 video_read_header,
352 raw_read_partial_packet,
353 raw_read_close,
354 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
355 .value = CODEC_ID_H263,
356 };
357
358 #ifdef CONFIG_ENCODERS
359 AVOutputFormat h263_oformat = {
360 "h263",
361 "raw h263",
362 "video/x-h263",
363 "h263",
364 0,
365 0,
366 CODEC_ID_H263,
367 raw_write_header,
368 raw_write_packet,
369 raw_write_trailer,
370 };
371 #endif //CONFIG_ENCODERS
372
373 AVInputFormat m4v_iformat = {
374 "m4v",
375 "raw MPEG4 video format",
376 0,
377 NULL /*mpegvideo_probe*/,
378 video_read_header,
379 raw_read_partial_packet,
380 raw_read_close,
381 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
382 .value = CODEC_ID_MPEG4,
383 };
384
385 #ifdef CONFIG_ENCODERS
386 AVOutputFormat m4v_oformat = {
387 "m4v",
388 "raw MPEG4 video format",
389 NULL,
390 "m4v",
391 0,
392 CODEC_ID_NONE,
393 CODEC_ID_MPEG4,
394 raw_write_header,
395 raw_write_packet,
396 raw_write_trailer,
397 };
398 #endif //CONFIG_ENCODERS
399
400 AVInputFormat h264_iformat = {
401 "h264",
402 "raw H264 video format",
403 0,
404 NULL /*mpegvideo_probe*/,
405 video_read_header,
406 raw_read_partial_packet,
407 raw_read_close,
408 .extensions = "h26l,h264", //FIXME remove after writing mpeg4_probe
409 .value = CODEC_ID_H264,
410 };
411
412 #ifdef CONFIG_ENCODERS
413 AVOutputFormat h264_oformat = {
414 "h264",
415 "raw H264 video format",
416 NULL,
417 "h264",
418 0,
419 CODEC_ID_NONE,
420 CODEC_ID_H264,
421 raw_write_header,
422 raw_write_packet,
423 raw_write_trailer,
424 };
425 #endif //CONFIG_ENCODERS
426
427 AVInputFormat mpegvideo_iformat = {
428 "mpegvideo",
429 "MPEG video",
430 0,
431 mpegvideo_probe,
432 video_read_header,
433 raw_read_partial_packet,
434 raw_read_close,
435 .value = CODEC_ID_MPEG1VIDEO,
436 };
437
438 #ifdef CONFIG_ENCODERS
439 AVOutputFormat mpeg1video_oformat = {
440 "mpeg1video",
441 "MPEG video",
442 "video/x-mpeg",
443 "mpg,mpeg",
444 0,
445 0,
446 CODEC_ID_MPEG1VIDEO,
447 raw_write_header,
448 raw_write_packet,
449 raw_write_trailer,
450 };
451 #endif //CONFIG_ENCODERS
452
453 AVInputFormat mjpeg_iformat = {
454 "mjpeg",
455 "MJPEG video",
456 0,
457 NULL,
458 video_read_header,
459 raw_read_partial_packet,
460 raw_read_close,
461 .extensions = "mjpg,mjpeg",
462 .value = CODEC_ID_MJPEG,
463 };
464
465 #ifdef CONFIG_ENCODERS
466 AVOutputFormat mjpeg_oformat = {
467 "mjpeg",
468 "MJPEG video",
469 "video/x-mjpeg",
470 "mjpg,mjpeg",
471 0,
472 0,
473 CODEC_ID_MJPEG,
474 raw_write_header,
475 raw_write_packet,
476 raw_write_trailer,
477 };
478 #endif //CONFIG_ENCODERS
479
480 /* pcm formats */
481
482 #define PCMINPUTDEF(name, long_name, ext, codec) \
483 AVInputFormat pcm_ ## name ## _iformat = {\
484 #name,\
485 long_name,\
486 0,\
487 NULL,\
488 raw_read_header,\
489 raw_read_packet,\
490 raw_read_close,\
491 pcm_read_seek,\
492 .extensions = ext,\
493 .value = codec,\
494 };
495
496 #if !defined(CONFIG_ENCODERS) && defined(CONFIG_DECODERS)
497
498 #define PCMDEF(name, long_name, ext, codec) \
499 PCMINPUTDEF(name, long_name, ext, codec)
500
501 #else
502
503 #define PCMDEF(name, long_name, ext, codec) \
504 PCMINPUTDEF(name, long_name, ext, codec)\
505 \
506 AVOutputFormat pcm_ ## name ## _oformat = {\
507 #name,\
508 long_name,\
509 NULL,\
510 ext,\
511 0,\
512 codec,\
513 0,\
514 raw_write_header,\
515 raw_write_packet,\
516 raw_write_trailer,\
517 };
518 #endif //CONFIG_ENCODERS
519
520 #ifdef WORDS_BIGENDIAN
521 #define BE_DEF(s) s
522 #define LE_DEF(s) NULL
523 #else
524 #define BE_DEF(s) NULL
525 #define LE_DEF(s) s
526 #endif
527
528
529 PCMDEF(s16le, "pcm signed 16 bit little endian format",
530 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
531
532 PCMDEF(s16be, "pcm signed 16 bit big endian format",
533 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
534
535 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
536 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
537
538 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
539 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
540
541 PCMDEF(s8, "pcm signed 8 bit format",
542 "sb", CODEC_ID_PCM_S8)
543
544 PCMDEF(u8, "pcm unsigned 8 bit format",
545 "ub", CODEC_ID_PCM_U8)
546
547 PCMDEF(mulaw, "pcm mu law format",
548 "ul", CODEC_ID_PCM_MULAW)
549
550 PCMDEF(alaw, "pcm A law format",
551 "al", CODEC_ID_PCM_ALAW)
552
553 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
554 {
555 int packet_size, ret, width, height;
556 AVStream *st = s->streams[0];
557
558 width = st->codec.width;
559 height = st->codec.height;
560
561 packet_size = avpicture_get_size(st->codec.pix_fmt, width, height);
562 if (packet_size < 0)
563 return -1;
564
565 if (av_new_packet(pkt, packet_size) < 0)
566 return AVERROR_IO;
567
568 pkt->stream_index = 0;
569 #if 0
570 /* bypass buffered I/O */
571 ret = url_read(url_fileno(&s->pb), pkt->data, pkt->size);
572 #else
573 ret = get_buffer(&s->pb, pkt->data, pkt->size);
574 #endif
575 if (ret != pkt->size) {
576 av_free_packet(pkt);
577 return AVERROR_IO;
578 } else {
579 return 0;
580 }
581 }
582
583 AVInputFormat rawvideo_iformat = {
584 "rawvideo",
585 "raw video format",
586 0,
587 NULL,
588 raw_read_header,
589 rawvideo_read_packet,
590 raw_read_close,
591 .extensions = "yuv",
592 .value = CODEC_ID_RAWVIDEO,
593 };
594
595 #ifdef CONFIG_ENCODERS
596 AVOutputFormat rawvideo_oformat = {
597 "rawvideo",
598 "raw video format",
599 NULL,
600 "yuv",
601 0,
602 CODEC_ID_NONE,
603 CODEC_ID_RAWVIDEO,
604 raw_write_header,
605 raw_write_packet,
606 raw_write_trailer,
607 };
608 #endif //CONFIG_ENCODERS
609
610 #ifdef CONFIG_ENCODERS
611 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
612 {
613 return 0;
614 }
615
616 AVOutputFormat null_oformat = {
617 "null",
618 "null video format",
619 NULL,
620 NULL,
621 0,
622 #ifdef WORDS_BIGENDIAN
623 CODEC_ID_PCM_S16BE,
624 #else
625 CODEC_ID_PCM_S16LE,
626 #endif
627 CODEC_ID_RAWVIDEO,
628 raw_write_header,
629 null_write_packet,
630 raw_write_trailer,
631 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE,
632 };
633 #endif //CONFIG_ENCODERS
634
635 #ifndef CONFIG_ENCODERS
636 #define av_register_output_format(format)
637 #endif
638 #ifndef CONFIG_DECODERS
639 #define av_register_input_format(format)
640 #endif
641
642 int raw_init(void)
643 {
644 av_register_input_format(&ac3_iformat);
645 av_register_output_format(&ac3_oformat);
646
647 av_register_input_format(&dts_iformat);
648
649 av_register_input_format(&h261_iformat);
650
651 av_register_input_format(&h263_iformat);
652 av_register_output_format(&h263_oformat);
653
654 av_register_input_format(&m4v_iformat);
655 av_register_output_format(&m4v_oformat);
656
657 av_register_input_format(&h264_iformat);
658 av_register_output_format(&h264_oformat);
659
660 av_register_input_format(&mpegvideo_iformat);
661 av_register_output_format(&mpeg1video_oformat);
662
663 av_register_input_format(&mjpeg_iformat);
664 av_register_output_format(&mjpeg_oformat);
665
666 av_register_input_format(&pcm_s16le_iformat);
667 av_register_output_format(&pcm_s16le_oformat);
668 av_register_input_format(&pcm_s16be_iformat);
669 av_register_output_format(&pcm_s16be_oformat);
670 av_register_input_format(&pcm_u16le_iformat);
671 av_register_output_format(&pcm_u16le_oformat);
672 av_register_input_format(&pcm_u16be_iformat);
673 av_register_output_format(&pcm_u16be_oformat);
674 av_register_input_format(&pcm_s8_iformat);
675 av_register_output_format(&pcm_s8_oformat);
676 av_register_input_format(&pcm_u8_iformat);
677 av_register_output_format(&pcm_u8_oformat);
678 av_register_input_format(&pcm_mulaw_iformat);
679 av_register_output_format(&pcm_mulaw_oformat);
680 av_register_input_format(&pcm_alaw_iformat);
681 av_register_output_format(&pcm_alaw_oformat);
682
683 av_register_input_format(&rawvideo_iformat);
684 av_register_output_format(&rawvideo_oformat);
685
686 av_register_output_format(&null_oformat);
687 return 0;
688 }