disable encoders where appropriate (patch courtesy of BERO
[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, int stream_index,
29 const uint8_t *buf, int size, int64_t pts)
30 {
31 put_buffer(&s->pb, buf, size);
32 put_flush_packet(&s->pb);
33 return 0;
34 }
35
36 static int raw_write_trailer(struct AVFormatContext *s)
37 {
38 return 0;
39 }
40 #endif //CONFIG_ENCODERS
41
42 /* raw input */
43 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
44 {
45 AVStream *st;
46 int id;
47
48 st = av_new_stream(s, 0);
49 if (!st)
50 return AVERROR_NOMEM;
51 if (ap) {
52 id = s->iformat->value;
53 if (id == CODEC_ID_RAWVIDEO) {
54 st->codec.codec_type = CODEC_TYPE_VIDEO;
55 } else {
56 st->codec.codec_type = CODEC_TYPE_AUDIO;
57 }
58 st->codec.codec_id = id;
59
60 switch(st->codec.codec_type) {
61 case CODEC_TYPE_AUDIO:
62 st->codec.sample_rate = ap->sample_rate;
63 st->codec.channels = ap->channels;
64 break;
65 case CODEC_TYPE_VIDEO:
66 st->codec.frame_rate = ap->frame_rate;
67 st->codec.frame_rate_base = ap->frame_rate_base;
68 st->codec.width = ap->width;
69 st->codec.height = ap->height;
70 st->codec.pix_fmt = ap->pix_fmt;
71 break;
72 default:
73 return -1;
74 }
75 } else {
76 return -1;
77 }
78 return 0;
79 }
80
81 #define RAW_PACKET_SIZE 1024
82
83 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
84 {
85 int ret, size;
86 // AVStream *st = s->streams[0];
87
88 size= RAW_PACKET_SIZE;
89
90 if (av_new_packet(pkt, size) < 0)
91 return -EIO;
92
93 pkt->stream_index = 0;
94 ret = get_buffer(&s->pb, pkt->data, size);
95 if (ret <= 0) {
96 av_free_packet(pkt);
97 return -EIO;
98 }
99 /* note: we need to modify the packet size here to handle the last
100 packet */
101 pkt->size = ret;
102 return ret;
103 }
104
105 static int raw_read_close(AVFormatContext *s)
106 {
107 return 0;
108 }
109
110 /* ac3 read */
111 static int ac3_read_header(AVFormatContext *s,
112 AVFormatParameters *ap)
113 {
114 AVStream *st;
115
116 st = av_new_stream(s, 0);
117 if (!st)
118 return AVERROR_NOMEM;
119
120 st->codec.codec_type = CODEC_TYPE_AUDIO;
121 st->codec.codec_id = CODEC_ID_AC3;
122 /* the parameters will be extracted from the compressed bitstream */
123 return 0;
124 }
125
126 /* mpeg1/h263 input */
127 static int video_read_header(AVFormatContext *s,
128 AVFormatParameters *ap)
129 {
130 AVStream *st;
131
132 st = av_new_stream(s, 0);
133 if (!st)
134 return AVERROR_NOMEM;
135
136 st->codec.codec_type = CODEC_TYPE_VIDEO;
137 st->codec.codec_id = s->iformat->value;
138 /* for mjpeg, specify frame rate */
139 /* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/
140 if (st->codec.codec_id == CODEC_ID_MJPEG || st->codec.codec_id == CODEC_ID_MPEG4) {
141 if (ap) {
142 st->codec.frame_rate = ap->frame_rate;
143 st->codec.frame_rate_base = ap->frame_rate_base;
144 } else {
145 st->codec.frame_rate = 25;
146 st->codec.frame_rate_base = 1;
147 }
148 }
149 return 0;
150 }
151
152 #define SEQ_START_CODE 0x000001b3
153 #define GOP_START_CODE 0x000001b8
154 #define PICTURE_START_CODE 0x00000100
155
156 /* XXX: improve that by looking at several start codes */
157 static int mpegvideo_probe(AVProbeData *p)
158 {
159 int code;
160 const uint8_t *d;
161
162 /* we search the first start code. If it is a sequence, gop or
163 picture start code then we decide it is an mpeg video
164 stream. We do not send highest value to give a chance to mpegts */
165 /* NOTE: the search range was restricted to avoid too many false
166 detections */
167
168 if (p->buf_size < 6)
169 return 0;
170 d = p->buf;
171 code = (d[0] << 24) | (d[1] << 16) | (d[2] << 8) | (d[3]);
172 if ((code & 0xffffff00) == 0x100) {
173 if (code == SEQ_START_CODE ||
174 code == GOP_START_CODE ||
175 code == PICTURE_START_CODE)
176 return 50 - 1;
177 else
178 return 0;
179 }
180 return 0;
181 }
182
183 static int h263_probe(AVProbeData *p)
184 {
185 int code;
186 const uint8_t *d;
187
188 if (p->buf_size < 6)
189 return 0;
190 d = p->buf;
191 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
192 if (code == 0x20) {
193 return 50;
194 }
195 return 0;
196 }
197
198 AVInputFormat ac3_iformat = {
199 "ac3",
200 "raw ac3",
201 0,
202 NULL,
203 ac3_read_header,
204 raw_read_packet,
205 raw_read_close,
206 .extensions = "ac3",
207 };
208
209 #ifdef CONFIG_ENCODERS
210 AVOutputFormat ac3_oformat = {
211 "ac3",
212 "raw ac3",
213 "audio/x-ac3",
214 "ac3",
215 0,
216 CODEC_ID_AC3,
217 0,
218 raw_write_header,
219 raw_write_packet,
220 raw_write_trailer,
221 };
222 #endif //CONFIG_ENCODERS
223
224 AVInputFormat h263_iformat = {
225 "h263",
226 "raw h263",
227 0,
228 h263_probe,
229 video_read_header,
230 raw_read_packet,
231 raw_read_close,
232 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
233 .value = CODEC_ID_H263,
234 };
235
236 #ifdef CONFIG_ENCODERS
237 AVOutputFormat h263_oformat = {
238 "h263",
239 "raw h263",
240 "video/x-h263",
241 "h263",
242 0,
243 0,
244 CODEC_ID_H263,
245 raw_write_header,
246 raw_write_packet,
247 raw_write_trailer,
248 };
249 #endif //CONFIG_ENCODERS
250
251 AVInputFormat m4v_iformat = {
252 "m4v",
253 "raw MPEG4 video format",
254 0,
255 NULL /*mpegvideo_probe*/,
256 video_read_header,
257 raw_read_packet,
258 raw_read_close,
259 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
260 .value = CODEC_ID_MPEG4,
261 };
262
263 #ifdef CONFIG_ENCODERS
264 AVOutputFormat m4v_oformat = {
265 "m4v",
266 "raw MPEG4 video format",
267 NULL,
268 "m4v",
269 0,
270 CODEC_ID_NONE,
271 CODEC_ID_MPEG4,
272 raw_write_header,
273 raw_write_packet,
274 raw_write_trailer,
275 };
276 #endif //CONFIG_ENCODERS
277
278 AVInputFormat h264_iformat = {
279 "h264",
280 "raw H264 video format",
281 0,
282 NULL /*mpegvideo_probe*/,
283 video_read_header,
284 raw_read_packet,
285 raw_read_close,
286 .extensions = "h26l,h264", //FIXME remove after writing mpeg4_probe
287 .value = CODEC_ID_H264,
288 };
289
290 #ifdef CONFIG_ENCODERS
291 AVOutputFormat h264_oformat = {
292 "h264",
293 "raw H264 video format",
294 NULL,
295 "h264",
296 0,
297 CODEC_ID_NONE,
298 CODEC_ID_H264,
299 raw_write_header,
300 raw_write_packet,
301 raw_write_trailer,
302 };
303 #endif //CONFIG_ENCODERS
304
305 AVInputFormat mpegvideo_iformat = {
306 "mpegvideo",
307 "MPEG video",
308 0,
309 mpegvideo_probe,
310 video_read_header,
311 raw_read_packet,
312 raw_read_close,
313 .value = CODEC_ID_MPEG1VIDEO,
314 };
315
316 #ifdef CONFIG_ENCODERS
317 AVOutputFormat mpeg1video_oformat = {
318 "mpeg1video",
319 "MPEG video",
320 "video/x-mpeg",
321 "mpg,mpeg",
322 0,
323 0,
324 CODEC_ID_MPEG1VIDEO,
325 raw_write_header,
326 raw_write_packet,
327 raw_write_trailer,
328 };
329 #endif //CONFIG_ENCODERS
330
331 AVInputFormat mjpeg_iformat = {
332 "mjpeg",
333 "MJPEG video",
334 0,
335 NULL,
336 video_read_header,
337 raw_read_packet,
338 raw_read_close,
339 .extensions = "mjpg,mjpeg",
340 .value = CODEC_ID_MJPEG,
341 };
342
343 #ifdef CONFIG_ENCODERS
344 AVOutputFormat mjpeg_oformat = {
345 "mjpeg",
346 "MJPEG video",
347 "video/x-mjpeg",
348 "mjpg,mjpeg",
349 0,
350 0,
351 CODEC_ID_MJPEG,
352 raw_write_header,
353 raw_write_packet,
354 raw_write_trailer,
355 };
356 #endif //CONFIG_ENCODERS
357
358 /* pcm formats */
359 #if !defined(CONFIG_ENCODERS) && defined(CONFIG_DECODERS)
360
361 #define PCMDEF(name, long_name, ext, codec) \
362 AVInputFormat pcm_ ## name ## _iformat = {\
363 #name,\
364 long_name,\
365 0,\
366 NULL,\
367 raw_read_header,\
368 raw_read_packet,\
369 raw_read_close,\
370 .extensions = ext,\
371 .value = codec,\
372 };
373
374 #else
375
376 #define PCMDEF(name, long_name, ext, codec) \
377 AVInputFormat pcm_ ## name ## _iformat = {\
378 #name,\
379 long_name,\
380 0,\
381 NULL,\
382 raw_read_header,\
383 raw_read_packet,\
384 raw_read_close,\
385 .extensions = ext,\
386 .value = codec,\
387 };\
388 \
389 AVOutputFormat pcm_ ## name ## _oformat = {\
390 #name,\
391 long_name,\
392 NULL,\
393 ext,\
394 0,\
395 codec,\
396 0,\
397 raw_write_header,\
398 raw_write_packet,\
399 raw_write_trailer,\
400 };
401 #endif //CONFIG_ENCODERS
402
403 #ifdef WORDS_BIGENDIAN
404 #define BE_DEF(s) s
405 #define LE_DEF(s) NULL
406 #else
407 #define BE_DEF(s) NULL
408 #define LE_DEF(s) s
409 #endif
410
411
412 PCMDEF(s16le, "pcm signed 16 bit little endian format",
413 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
414
415 PCMDEF(s16be, "pcm signed 16 bit big endian format",
416 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
417
418 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
419 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
420
421 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
422 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
423
424 PCMDEF(s8, "pcm signed 8 bit format",
425 "sb", CODEC_ID_PCM_S8)
426
427 PCMDEF(u8, "pcm unsigned 8 bit format",
428 "ub", CODEC_ID_PCM_U8)
429
430 PCMDEF(mulaw, "pcm mu law format",
431 "ul", CODEC_ID_PCM_MULAW)
432
433 PCMDEF(alaw, "pcm A law format",
434 "al", CODEC_ID_PCM_ALAW)
435
436 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
437 {
438 int packet_size, ret, width, height;
439 AVStream *st = s->streams[0];
440
441 width = st->codec.width;
442 height = st->codec.height;
443
444 packet_size = avpicture_get_size(st->codec.pix_fmt, width, height);
445 if (packet_size < 0)
446 av_abort();
447
448 if (av_new_packet(pkt, packet_size) < 0)
449 return -EIO;
450
451 pkt->stream_index = 0;
452 #if 0
453 /* bypass buffered I/O */
454 ret = url_read(url_fileno(&s->pb), pkt->data, pkt->size);
455 #else
456 ret = get_buffer(&s->pb, pkt->data, pkt->size);
457 #endif
458 if (ret != pkt->size) {
459 av_free_packet(pkt);
460 return -EIO;
461 } else {
462 return 0;
463 }
464 }
465
466 AVInputFormat rawvideo_iformat = {
467 "rawvideo",
468 "raw video format",
469 0,
470 NULL,
471 raw_read_header,
472 rawvideo_read_packet,
473 raw_read_close,
474 .extensions = "yuv",
475 .value = CODEC_ID_RAWVIDEO,
476 };
477
478 #ifdef CONFIG_ENCODERS
479 AVOutputFormat rawvideo_oformat = {
480 "rawvideo",
481 "raw video format",
482 NULL,
483 "yuv",
484 0,
485 CODEC_ID_NONE,
486 CODEC_ID_RAWVIDEO,
487 raw_write_header,
488 raw_write_packet,
489 raw_write_trailer,
490 };
491 #endif //CONFIG_ENCODERS
492
493 #ifdef CONFIG_ENCODERS
494 static int null_write_packet(struct AVFormatContext *s,
495 int stream_index,
496 const uint8_t *buf, int size, int64_t pts)
497 {
498 return 0;
499 }
500
501 AVOutputFormat null_oformat = {
502 "null",
503 "null video format",
504 NULL,
505 NULL,
506 0,
507 #ifdef WORDS_BIGENDIAN
508 CODEC_ID_PCM_S16BE,
509 #else
510 CODEC_ID_PCM_S16LE,
511 #endif
512 CODEC_ID_RAWVIDEO,
513 raw_write_header,
514 null_write_packet,
515 raw_write_trailer,
516 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE,
517 };
518 #endif //CONFIG_ENCODERS
519
520 #ifndef CONFIG_ENCODERS
521 #define av_register_output_format(format)
522 #endif
523 #ifndef CONFIG_DECODERS
524 #define av_register_input_format(format)
525 #endif
526
527 int raw_init(void)
528 {
529 av_register_input_format(&ac3_iformat);
530 av_register_output_format(&ac3_oformat);
531
532 av_register_input_format(&h263_iformat);
533 av_register_output_format(&h263_oformat);
534
535 av_register_input_format(&m4v_iformat);
536 av_register_output_format(&m4v_oformat);
537
538 av_register_input_format(&h264_iformat);
539 av_register_output_format(&h264_oformat);
540
541 av_register_input_format(&mpegvideo_iformat);
542 av_register_output_format(&mpeg1video_oformat);
543
544 av_register_input_format(&mjpeg_iformat);
545 av_register_output_format(&mjpeg_oformat);
546
547 av_register_input_format(&pcm_s16le_iformat);
548 av_register_output_format(&pcm_s16le_oformat);
549 av_register_input_format(&pcm_s16be_iformat);
550 av_register_output_format(&pcm_s16be_oformat);
551 av_register_input_format(&pcm_u16le_iformat);
552 av_register_output_format(&pcm_u16le_oformat);
553 av_register_input_format(&pcm_u16be_iformat);
554 av_register_output_format(&pcm_u16be_oformat);
555 av_register_input_format(&pcm_s8_iformat);
556 av_register_output_format(&pcm_s8_oformat);
557 av_register_input_format(&pcm_u8_iformat);
558 av_register_output_format(&pcm_u8_oformat);
559 av_register_input_format(&pcm_mulaw_iformat);
560 av_register_output_format(&pcm_mulaw_oformat);
561 av_register_input_format(&pcm_alaw_iformat);
562 av_register_output_format(&pcm_alaw_oformat);
563
564 av_register_input_format(&rawvideo_iformat);
565 av_register_output_format(&rawvideo_oformat);
566
567 av_register_output_format(&null_oformat);
568 return 0;
569 }