9a79ac7b06c24ab4bcf2197cafc330e0ab6df3e9
[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)
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(timestamp * byte_rate, st->time_base.num, st->time_base.den);
162 pos = (pos / block_align) * block_align;
163
164 /* recompute exact position */
165 st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
166 url_fseek(&s->pb, pos + s->data_offset, SEEK_SET);
167 return 0;
168 }
169
170 /* ac3 read */
171 static 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;
182 st->need_parsing = 1;
183 /* the parameters will be extracted from the compressed bitstream */
184 return 0;
185 }
186
187 /* mpeg1/h263 input */
188 static int video_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_VIDEO;
198 st->codec.codec_id = s->iformat->value;
199 st->need_parsing = 1;
200
201 /* for mjpeg, specify frame rate */
202 /* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/
203 if (st->codec.codec_id == CODEC_ID_MJPEG ||
204 st->codec.codec_id == CODEC_ID_MPEG4) {
205 if (ap && ap->frame_rate) {
206 st->codec.frame_rate = ap->frame_rate;
207 st->codec.frame_rate_base = ap->frame_rate_base;
208 } else {
209 st->codec.frame_rate = 25;
210 st->codec.frame_rate_base = 1;
211 }
212 }
213 return 0;
214 }
215
216 #define SEQ_START_CODE 0x000001b3
217 #define GOP_START_CODE 0x000001b8
218 #define PICTURE_START_CODE 0x00000100
219
220 /* XXX: improve that by looking at several start codes */
221 static int mpegvideo_probe(AVProbeData *p)
222 {
223 int code;
224 const uint8_t *d;
225
226 /* we search the first start code. If it is a sequence, gop or
227 picture start code then we decide it is an mpeg video
228 stream. We do not send highest value to give a chance to mpegts */
229 /* NOTE: the search range was restricted to avoid too many false
230 detections */
231
232 if (p->buf_size < 6)
233 return 0;
234 d = p->buf;
235 code = (d[0] << 24) | (d[1] << 16) | (d[2] << 8) | (d[3]);
236 if ((code & 0xffffff00) == 0x100) {
237 if (code == SEQ_START_CODE ||
238 code == GOP_START_CODE ||
239 code == PICTURE_START_CODE)
240 return 50 - 1;
241 else
242 return 0;
243 }
244 return 0;
245 }
246
247 static int h263_probe(AVProbeData *p)
248 {
249 int code;
250 const uint8_t *d;
251
252 if (p->buf_size < 6)
253 return 0;
254 d = p->buf;
255 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
256 if (code == 0x20) {
257 return 50;
258 }
259 return 0;
260 }
261
262 static int h261_probe(AVProbeData *p)
263 {
264 int code;
265 const uint8_t *d;
266
267 if (p->buf_size < 6)
268 return 0;
269 d = p->buf;
270 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
271 if (code == 0x10) {
272 return 50;
273 }
274 return 0;
275 }
276
277 AVInputFormat ac3_iformat = {
278 "ac3",
279 "raw ac3",
280 0,
281 NULL,
282 ac3_read_header,
283 raw_read_partial_packet,
284 raw_read_close,
285 .extensions = "ac3",
286 };
287
288 #ifdef CONFIG_ENCODERS
289 AVOutputFormat ac3_oformat = {
290 "ac3",
291 "raw ac3",
292 "audio/x-ac3",
293 "ac3",
294 0,
295 CODEC_ID_AC3,
296 0,
297 raw_write_header,
298 raw_write_packet,
299 raw_write_trailer,
300 };
301 #endif //CONFIG_ENCODERS
302
303 AVInputFormat h261_iformat = {
304 "h261",
305 "raw h261",
306 0,
307 h261_probe,
308 video_read_header,
309 raw_read_partial_packet,
310 raw_read_close,
311 .extensions = "h261",
312 .value = CODEC_ID_H261,
313 };
314
315 AVInputFormat h263_iformat = {
316 "h263",
317 "raw h263",
318 0,
319 h263_probe,
320 video_read_header,
321 raw_read_partial_packet,
322 raw_read_close,
323 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
324 .value = CODEC_ID_H263,
325 };
326
327 #ifdef CONFIG_ENCODERS
328 AVOutputFormat h263_oformat = {
329 "h263",
330 "raw h263",
331 "video/x-h263",
332 "h263",
333 0,
334 0,
335 CODEC_ID_H263,
336 raw_write_header,
337 raw_write_packet,
338 raw_write_trailer,
339 };
340 #endif //CONFIG_ENCODERS
341
342 AVInputFormat m4v_iformat = {
343 "m4v",
344 "raw MPEG4 video format",
345 0,
346 NULL /*mpegvideo_probe*/,
347 video_read_header,
348 raw_read_partial_packet,
349 raw_read_close,
350 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
351 .value = CODEC_ID_MPEG4,
352 };
353
354 #ifdef CONFIG_ENCODERS
355 AVOutputFormat m4v_oformat = {
356 "m4v",
357 "raw MPEG4 video format",
358 NULL,
359 "m4v",
360 0,
361 CODEC_ID_NONE,
362 CODEC_ID_MPEG4,
363 raw_write_header,
364 raw_write_packet,
365 raw_write_trailer,
366 };
367 #endif //CONFIG_ENCODERS
368
369 AVInputFormat h264_iformat = {
370 "h264",
371 "raw H264 video format",
372 0,
373 NULL /*mpegvideo_probe*/,
374 video_read_header,
375 raw_read_partial_packet,
376 raw_read_close,
377 .extensions = "h26l,h264", //FIXME remove after writing mpeg4_probe
378 .value = CODEC_ID_H264,
379 };
380
381 #ifdef CONFIG_ENCODERS
382 AVOutputFormat h264_oformat = {
383 "h264",
384 "raw H264 video format",
385 NULL,
386 "h264",
387 0,
388 CODEC_ID_NONE,
389 CODEC_ID_H264,
390 raw_write_header,
391 raw_write_packet,
392 raw_write_trailer,
393 };
394 #endif //CONFIG_ENCODERS
395
396 AVInputFormat mpegvideo_iformat = {
397 "mpegvideo",
398 "MPEG video",
399 0,
400 mpegvideo_probe,
401 video_read_header,
402 raw_read_partial_packet,
403 raw_read_close,
404 .value = CODEC_ID_MPEG1VIDEO,
405 };
406
407 #ifdef CONFIG_ENCODERS
408 AVOutputFormat mpeg1video_oformat = {
409 "mpeg1video",
410 "MPEG video",
411 "video/x-mpeg",
412 "mpg,mpeg",
413 0,
414 0,
415 CODEC_ID_MPEG1VIDEO,
416 raw_write_header,
417 raw_write_packet,
418 raw_write_trailer,
419 };
420 #endif //CONFIG_ENCODERS
421
422 AVInputFormat mjpeg_iformat = {
423 "mjpeg",
424 "MJPEG video",
425 0,
426 NULL,
427 video_read_header,
428 raw_read_partial_packet,
429 raw_read_close,
430 .extensions = "mjpg,mjpeg",
431 .value = CODEC_ID_MJPEG,
432 };
433
434 #ifdef CONFIG_ENCODERS
435 AVOutputFormat mjpeg_oformat = {
436 "mjpeg",
437 "MJPEG video",
438 "video/x-mjpeg",
439 "mjpg,mjpeg",
440 0,
441 0,
442 CODEC_ID_MJPEG,
443 raw_write_header,
444 raw_write_packet,
445 raw_write_trailer,
446 };
447 #endif //CONFIG_ENCODERS
448
449 /* pcm formats */
450
451 #define PCMINPUTDEF(name, long_name, ext, codec) \
452 AVInputFormat pcm_ ## name ## _iformat = {\
453 #name,\
454 long_name,\
455 0,\
456 NULL,\
457 raw_read_header,\
458 raw_read_packet,\
459 raw_read_close,\
460 pcm_read_seek,\
461 .extensions = ext,\
462 .value = codec,\
463 };
464
465 #if !defined(CONFIG_ENCODERS) && defined(CONFIG_DECODERS)
466
467 #define PCMDEF(name, long_name, ext, codec) \
468 PCMINPUTDEF(name, long_name, ext, codec)
469
470 #else
471
472 #define PCMDEF(name, long_name, ext, codec) \
473 PCMINPUTDEF(name, long_name, ext, codec)\
474 \
475 AVOutputFormat pcm_ ## name ## _oformat = {\
476 #name,\
477 long_name,\
478 NULL,\
479 ext,\
480 0,\
481 codec,\
482 0,\
483 raw_write_header,\
484 raw_write_packet,\
485 raw_write_trailer,\
486 };
487 #endif //CONFIG_ENCODERS
488
489 #ifdef WORDS_BIGENDIAN
490 #define BE_DEF(s) s
491 #define LE_DEF(s) NULL
492 #else
493 #define BE_DEF(s) NULL
494 #define LE_DEF(s) s
495 #endif
496
497
498 PCMDEF(s16le, "pcm signed 16 bit little endian format",
499 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
500
501 PCMDEF(s16be, "pcm signed 16 bit big endian format",
502 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
503
504 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
505 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
506
507 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
508 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
509
510 PCMDEF(s8, "pcm signed 8 bit format",
511 "sb", CODEC_ID_PCM_S8)
512
513 PCMDEF(u8, "pcm unsigned 8 bit format",
514 "ub", CODEC_ID_PCM_U8)
515
516 PCMDEF(mulaw, "pcm mu law format",
517 "ul", CODEC_ID_PCM_MULAW)
518
519 PCMDEF(alaw, "pcm A law format",
520 "al", CODEC_ID_PCM_ALAW)
521
522 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
523 {
524 int packet_size, ret, width, height;
525 AVStream *st = s->streams[0];
526
527 width = st->codec.width;
528 height = st->codec.height;
529
530 packet_size = avpicture_get_size(st->codec.pix_fmt, width, height);
531 if (packet_size < 0)
532 av_abort();
533
534 if (av_new_packet(pkt, packet_size) < 0)
535 return AVERROR_IO;
536
537 pkt->stream_index = 0;
538 #if 0
539 /* bypass buffered I/O */
540 ret = url_read(url_fileno(&s->pb), pkt->data, pkt->size);
541 #else
542 ret = get_buffer(&s->pb, pkt->data, pkt->size);
543 #endif
544 if (ret != pkt->size) {
545 av_free_packet(pkt);
546 return AVERROR_IO;
547 } else {
548 return 0;
549 }
550 }
551
552 AVInputFormat rawvideo_iformat = {
553 "rawvideo",
554 "raw video format",
555 0,
556 NULL,
557 raw_read_header,
558 rawvideo_read_packet,
559 raw_read_close,
560 .extensions = "yuv",
561 .value = CODEC_ID_RAWVIDEO,
562 };
563
564 #ifdef CONFIG_ENCODERS
565 AVOutputFormat rawvideo_oformat = {
566 "rawvideo",
567 "raw video format",
568 NULL,
569 "yuv",
570 0,
571 CODEC_ID_NONE,
572 CODEC_ID_RAWVIDEO,
573 raw_write_header,
574 raw_write_packet,
575 raw_write_trailer,
576 };
577 #endif //CONFIG_ENCODERS
578
579 #ifdef CONFIG_ENCODERS
580 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
581 {
582 return 0;
583 }
584
585 AVOutputFormat null_oformat = {
586 "null",
587 "null video format",
588 NULL,
589 NULL,
590 0,
591 #ifdef WORDS_BIGENDIAN
592 CODEC_ID_PCM_S16BE,
593 #else
594 CODEC_ID_PCM_S16LE,
595 #endif
596 CODEC_ID_RAWVIDEO,
597 raw_write_header,
598 null_write_packet,
599 raw_write_trailer,
600 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE,
601 };
602 #endif //CONFIG_ENCODERS
603
604 #ifndef CONFIG_ENCODERS
605 #define av_register_output_format(format)
606 #endif
607 #ifndef CONFIG_DECODERS
608 #define av_register_input_format(format)
609 #endif
610
611 int raw_init(void)
612 {
613 av_register_input_format(&ac3_iformat);
614 av_register_output_format(&ac3_oformat);
615
616 av_register_input_format(&h261_iformat);
617
618 av_register_input_format(&h263_iformat);
619 av_register_output_format(&h263_oformat);
620
621 av_register_input_format(&m4v_iformat);
622 av_register_output_format(&m4v_oformat);
623
624 av_register_input_format(&h264_iformat);
625 av_register_output_format(&h264_oformat);
626
627 av_register_input_format(&mpegvideo_iformat);
628 av_register_output_format(&mpeg1video_oformat);
629
630 av_register_input_format(&mjpeg_iformat);
631 av_register_output_format(&mjpeg_oformat);
632
633 av_register_input_format(&pcm_s16le_iformat);
634 av_register_output_format(&pcm_s16le_oformat);
635 av_register_input_format(&pcm_s16be_iformat);
636 av_register_output_format(&pcm_s16be_oformat);
637 av_register_input_format(&pcm_u16le_iformat);
638 av_register_output_format(&pcm_u16le_oformat);
639 av_register_input_format(&pcm_u16be_iformat);
640 av_register_output_format(&pcm_u16be_oformat);
641 av_register_input_format(&pcm_s8_iformat);
642 av_register_output_format(&pcm_s8_oformat);
643 av_register_input_format(&pcm_u8_iformat);
644 av_register_output_format(&pcm_u8_oformat);
645 av_register_input_format(&pcm_mulaw_iformat);
646 av_register_output_format(&pcm_mulaw_oformat);
647 av_register_input_format(&pcm_alaw_iformat);
648 av_register_output_format(&pcm_alaw_oformat);
649
650 av_register_input_format(&rawvideo_iformat);
651 av_register_output_format(&rawvideo_oformat);
652
653 av_register_output_format(&null_oformat);
654 return 0;
655 }