raw ac3 auto detects parameters
[libav.git] / libavformat / raw.c
CommitLineData
de6d9b64
FB
1/*
2 * RAW encoder and decoder
19720f15 3 * Copyright (c) 2001 Fabrice Bellard.
de6d9b64 4 *
19720f15
FB
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
FB
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
de6d9b64 14 *
19720f15
FB
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
FB
19#include "avformat.h"
20
21/* simple formats */
22int raw_write_header(struct AVFormatContext *s)
23{
24 return 0;
25}
26
27int raw_write_packet(struct AVFormatContext *s,
28 int stream_index,
10bb7023 29 unsigned char *buf, int size, int force_pts)
de6d9b64
FB
30{
31 put_buffer(&s->pb, buf, size);
32 put_flush_packet(&s->pb);
33 return 0;
34}
35
36int raw_write_trailer(struct AVFormatContext *s)
37{
38 return 0;
39}
40
41/* raw input */
42static int raw_read_header(AVFormatContext *s,
43 AVFormatParameters *ap)
44{
45 AVStream *st;
c9a65ca8 46 int id;
de6d9b64 47
c9a65ca8 48 st = av_new_stream(s, 0);
de6d9b64 49 if (!st)
c9a65ca8 50 return AVERROR_NOMEM;
de6d9b64 51 if (ap) {
c9a65ca8
FB
52 id = s->iformat->value;
53 if (id == CODEC_ID_RAWVIDEO) {
de6d9b64 54 st->codec.codec_type = CODEC_TYPE_VIDEO;
de6d9b64 55 } else {
c9a65ca8 56 st->codec.codec_type = CODEC_TYPE_AUDIO;
de6d9b64 57 }
c9a65ca8
FB
58 st->codec.codec_id = id;
59
de6d9b64
FB
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;
de6d9b64
FB
64 break;
65 case CODEC_TYPE_VIDEO:
66 st->codec.frame_rate = ap->frame_rate;
67 st->codec.width = ap->width;
68 st->codec.height = ap->height;
69 break;
70 default:
27e084bd 71 return -1;
de6d9b64
FB
72 }
73 } else {
27e084bd 74 return -1;
de6d9b64
FB
75 }
76 return 0;
77}
78
2e93e3aa 79#define RAW_PACKET_SIZE 1024
de6d9b64
FB
80
81int raw_read_packet(AVFormatContext *s,
82 AVPacket *pkt)
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)
de6d9b64
FB
90 return -EIO;
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);
2e93e3aa
FB
96 return -EIO;
97 }
98 /* note: we need to modify the packet size here to handle the last
99 packet */
100 pkt->size = ret;
de6d9b64
FB
101 return ret;
102}
103
104int raw_read_close(AVFormatContext *s)
105{
106 return 0;
107}
108
109/* mp3 read */
110static int mp3_read_header(AVFormatContext *s,
111 AVFormatParameters *ap)
112{
113 AVStream *st;
114
c9a65ca8 115 st = av_new_stream(s, 0);
de6d9b64 116 if (!st)
c9a65ca8 117 return AVERROR_NOMEM;
de6d9b64
FB
118
119 st->codec.codec_type = CODEC_TYPE_AUDIO;
120 st->codec.codec_id = CODEC_ID_MP2;
27e084bd 121 /* the parameters will be extracted from the compressed bitstream */
de6d9b64
FB
122 return 0;
123}
124
cd66005d
FB
125/* ac3 read */
126static int ac3_read_header(AVFormatContext *s,
127 AVFormatParameters *ap)
128{
129 AVStream *st;
130
131 st = av_new_stream(s, 0);
132 if (!st)
133 return AVERROR_NOMEM;
134
135 st->codec.codec_type = CODEC_TYPE_AUDIO;
136 st->codec.codec_id = CODEC_ID_AC3;
137 /* the parameters will be extracted from the compressed bitstream */
138 return 0;
139}
140
de6d9b64
FB
141/* mpeg1/h263 input */
142static int video_read_header(AVFormatContext *s,
143 AVFormatParameters *ap)
144{
145 AVStream *st;
146
c9a65ca8 147 st = av_new_stream(s, 0);
de6d9b64 148 if (!st)
c9a65ca8 149 return AVERROR_NOMEM;
de6d9b64
FB
150
151 st->codec.codec_type = CODEC_TYPE_VIDEO;
c9a65ca8 152 st->codec.codec_id = s->iformat->value;
27e084bd 153 /* for mjpeg, specify frame rate */
7866eeff
MN
154 /* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/
155 if (st->codec.codec_id == CODEC_ID_MJPEG || st->codec.codec_id == CODEC_ID_MPEG4) {
27e084bd
FB
156 if (ap) {
157 st->codec.frame_rate = ap->frame_rate;
158 } else {
159 st->codec.frame_rate = 25 * FRAME_RATE_BASE;
160 }
161 }
de6d9b64
FB
162 return 0;
163}
164
c9a65ca8
FB
165#define SEQ_START_CODE 0x000001b3
166#define GOP_START_CODE 0x000001b8
167#define PICTURE_START_CODE 0x00000100
168
169/* XXX: improve that by looking at several start codes */
170static int mpegvideo_probe(AVProbeData *p)
171{
fa777321
FB
172 int code;
173 const uint8_t *d;
c9a65ca8
FB
174
175 /* we search the first start code. If it is a sequence, gop or
176 picture start code then we decide it is an mpeg video
177 stream. We do not send highest value to give a chance to mpegts */
fa777321
FB
178 /* NOTE: the search range was restricted to avoid too many false
179 detections */
180
181 if (p->buf_size < 6)
182 return 0;
183 d = p->buf;
184 code = (d[0] << 24) | (d[1] << 16) | (d[2] << 8) | (d[3]);
185 if ((code & 0xffffff00) == 0x100) {
186 if (code == SEQ_START_CODE ||
187 code == GOP_START_CODE ||
188 code == PICTURE_START_CODE)
189 return 50 - 1;
190 else
191 return 0;
c9a65ca8
FB
192 }
193 return 0;
194}
195
196AVInputFormat mp3_iformat = {
197 "mp3",
de6d9b64 198 "MPEG audio",
c9a65ca8
FB
199 0,
200 NULL,
201 mp3_read_header,
202 raw_read_packet,
203 raw_read_close,
bb76a117 204 .extensions = "mp2,mp3", /* XXX: use probe */
c9a65ca8
FB
205};
206
207AVOutputFormat mp2_oformat = {
208 "mp2",
209 "MPEG audio layer 2",
de6d9b64
FB
210 "audio/x-mpeg",
211 "mp2,mp3",
c9a65ca8 212 0,
de6d9b64
FB
213 CODEC_ID_MP2,
214 0,
215 raw_write_header,
216 raw_write_packet,
217 raw_write_trailer,
c9a65ca8 218};
de6d9b64 219
c9a65ca8
FB
220
221AVInputFormat ac3_iformat = {
222 "ac3",
223 "raw ac3",
224 0,
225 NULL,
cd66005d 226 ac3_read_header,
de6d9b64
FB
227 raw_read_packet,
228 raw_read_close,
bb76a117 229 .extensions = "ac3",
de6d9b64
FB
230};
231
c9a65ca8 232AVOutputFormat ac3_oformat = {
de6d9b64
FB
233 "ac3",
234 "raw ac3",
235 "audio/x-ac3",
236 "ac3",
c9a65ca8 237 0,
de6d9b64
FB
238 CODEC_ID_AC3,
239 0,
240 raw_write_header,
241 raw_write_packet,
242 raw_write_trailer,
243};
244
c9a65ca8 245AVOutputFormat h263_oformat = {
de6d9b64
FB
246 "h263",
247 "raw h263",
248 "video/x-h263",
249 "h263",
250 0,
c9a65ca8 251 0,
de6d9b64
FB
252 CODEC_ID_H263,
253 raw_write_header,
254 raw_write_packet,
255 raw_write_trailer,
c9a65ca8
FB
256};
257
7866eeff
MN
258AVInputFormat m4v_iformat = {
259 "m4v",
260 "raw MPEG4 video format",
261 0,
2f0f5b20 262 NULL /*mpegvideo_probe*/,
7866eeff
MN
263 video_read_header,
264 raw_read_packet,
265 raw_read_close,
bb76a117
MR
266 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
267 .value = CODEC_ID_MPEG4,
7866eeff
MN
268};
269
89b3d7c9
MK
270AVOutputFormat m4v_oformat = {
271 "m4v",
272 "raw MPEG4 video format",
273 NULL,
274 "m4v",
275 0,
276 CODEC_ID_NONE,
277 CODEC_ID_MPEG4,
278 raw_write_header,
279 raw_write_packet,
280 raw_write_trailer,
281};
282
c9a65ca8
FB
283AVInputFormat mpegvideo_iformat = {
284 "mpegvideo",
285 "MPEG video",
286 0,
287 mpegvideo_probe,
de6d9b64
FB
288 video_read_header,
289 raw_read_packet,
290 raw_read_close,
bb76a117 291 .value = CODEC_ID_MPEG1VIDEO,
de6d9b64
FB
292};
293
c9a65ca8
FB
294AVOutputFormat mpeg1video_oformat = {
295 "mpeg1video",
de6d9b64
FB
296 "MPEG video",
297 "video/x-mpeg",
298 "mpg,mpeg",
299 0,
c9a65ca8 300 0,
de6d9b64
FB
301 CODEC_ID_MPEG1VIDEO,
302 raw_write_header,
303 raw_write_packet,
304 raw_write_trailer,
de6d9b64
FB
305};
306
c9a65ca8 307AVInputFormat mjpeg_iformat = {
27e084bd
FB
308 "mjpeg",
309 "MJPEG video",
27e084bd 310 0,
c9a65ca8 311 NULL,
27e084bd
FB
312 video_read_header,
313 raw_read_packet,
314 raw_read_close,
bb76a117
MR
315 .extensions = "mjpg,mjpeg",
316 .value = CODEC_ID_MJPEG,
27e084bd
FB
317};
318
c9a65ca8
FB
319AVOutputFormat mjpeg_oformat = {
320 "mjpeg",
321 "MJPEG video",
322 "video/x-mjpeg",
323 "mjpg,mjpeg",
5ed8fafc 324 0,
5ed8fafc 325 0,
c9a65ca8 326 CODEC_ID_MJPEG,
5ed8fafc
FB
327 raw_write_header,
328 raw_write_packet,
329 raw_write_trailer,
5ed8fafc
FB
330};
331
c9a65ca8 332/* pcm formats */
5ed8fafc 333
c9a65ca8
FB
334#define PCMDEF(name, long_name, ext, codec) \
335AVInputFormat pcm_ ## name ## _iformat = {\
336 #name,\
337 long_name,\
338 0,\
339 NULL,\
340 raw_read_header,\
341 raw_read_packet,\
342 raw_read_close,\
bb76a117
MR
343 .extensions = ext,\
344 .value = codec,\
c9a65ca8
FB
345};\
346\
347AVOutputFormat pcm_ ## name ## _oformat = {\
348 #name,\
349 long_name,\
350 NULL,\
351 ext,\
352 0,\
353 codec,\
354 0,\
355 raw_write_header,\
356 raw_write_packet,\
357 raw_write_trailer,\
5ed8fafc
FB
358};
359
5ed8fafc 360#ifdef WORDS_BIGENDIAN
c9a65ca8
FB
361#define BE_DEF(s) s
362#define LE_DEF(s) NULL
5ed8fafc 363#else
c9a65ca8
FB
364#define BE_DEF(s) NULL
365#define LE_DEF(s) s
5ed8fafc 366#endif
5ed8fafc 367
5ed8fafc 368
c9a65ca8
FB
369PCMDEF(s16le, "pcm signed 16 bit little endian format",
370 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
5ed8fafc 371
c9a65ca8
FB
372PCMDEF(s16be, "pcm signed 16 bit big endian format",
373 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
5ed8fafc 374
c9a65ca8
FB
375PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
376 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
5ed8fafc 377
c9a65ca8
FB
378PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
379 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
5ed8fafc 380
c9a65ca8
FB
381PCMDEF(s8, "pcm signed 8 bit format",
382 "sb", CODEC_ID_PCM_S8)
5ed8fafc 383
c9a65ca8
FB
384PCMDEF(u8, "pcm unsigned 8 bit format",
385 "ub", CODEC_ID_PCM_U8)
5ed8fafc 386
c9a65ca8
FB
387PCMDEF(mulaw, "pcm mu law format",
388 "ul", CODEC_ID_PCM_MULAW)
de6d9b64 389
c9a65ca8
FB
390PCMDEF(alaw, "pcm A law format",
391 "al", CODEC_ID_PCM_ALAW)
de6d9b64
FB
392
393int rawvideo_read_packet(AVFormatContext *s,
394 AVPacket *pkt)
395{
396 int packet_size, ret, width, height;
397 AVStream *st = s->streams[0];
398
399 width = st->codec.width;
400 height = st->codec.height;
401
402 switch(st->codec.pix_fmt) {
403 case PIX_FMT_YUV420P:
404 packet_size = (width * height * 3) / 2;
405 break;
406 case PIX_FMT_YUV422:
407 packet_size = (width * height * 2);
408 break;
409 case PIX_FMT_BGR24:
410 case PIX_FMT_RGB24:
411 packet_size = (width * height * 3);
412 break;
413 default:
42343f7e 414 av_abort();
de6d9b64
FB
415 break;
416 }
417
418 if (av_new_packet(pkt, packet_size) < 0)
419 return -EIO;
420
421 pkt->stream_index = 0;
c2c2cd2d 422#if 0
de6d9b64
FB
423 /* bypass buffered I/O */
424 ret = url_read(url_fileno(&s->pb), pkt->data, pkt->size);
c2c2cd2d
MN
425#else
426 ret = get_buffer(&s->pb, pkt->data, pkt->size);
427#endif
de6d9b64
FB
428 if (ret != pkt->size) {
429 av_free_packet(pkt);
430 return -EIO;
431 } else {
432 return 0;
433 }
434}
435
c9a65ca8
FB
436AVInputFormat rawvideo_iformat = {
437 "rawvideo",
438 "raw video format",
439 0,
440 NULL,
441 raw_read_header,
442 rawvideo_read_packet,
443 raw_read_close,
bb76a117
MR
444 .extensions = "yuv",
445 .value = CODEC_ID_RAWVIDEO,
c9a65ca8
FB
446};
447
448AVOutputFormat rawvideo_oformat = {
de6d9b64
FB
449 "rawvideo",
450 "raw video format",
451 NULL,
452 "yuv",
c9a65ca8 453 0,
de6d9b64
FB
454 CODEC_ID_NONE,
455 CODEC_ID_RAWVIDEO,
456 raw_write_header,
457 raw_write_packet,
458 raw_write_trailer,
de6d9b64 459};
c9a65ca8 460
87bdd3e5
FB
461static int null_write_packet(struct AVFormatContext *s,
462 int stream_index,
463 unsigned char *buf, int size, int force_pts)
464{
465 return 0;
466}
467
468AVOutputFormat null_oformat = {
469 "null",
470 "null video format",
471 NULL,
472 NULL,
473 0,
474#ifdef WORDS_BIGENDIAN
475 CODEC_ID_PCM_S16BE,
476#else
477 CODEC_ID_PCM_S16LE,
478#endif
479 CODEC_ID_RAWVIDEO,
480 raw_write_header,
481 null_write_packet,
482 raw_write_trailer,
b1d89f82 483 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE,
87bdd3e5
FB
484};
485
c9a65ca8
FB
486int raw_init(void)
487{
488 av_register_input_format(&mp3_iformat);
489 av_register_output_format(&mp2_oformat);
490
491 av_register_input_format(&ac3_iformat);
492 av_register_output_format(&ac3_oformat);
493
494 av_register_output_format(&h263_oformat);
89b3d7c9 495
7866eeff 496 av_register_input_format(&m4v_iformat);
89b3d7c9 497 av_register_output_format(&m4v_oformat);
c9a65ca8
FB
498
499 av_register_input_format(&mpegvideo_iformat);
500 av_register_output_format(&mpeg1video_oformat);
501
502 av_register_input_format(&mjpeg_iformat);
503 av_register_output_format(&mjpeg_oformat);
504
505 av_register_input_format(&pcm_s16le_iformat);
506 av_register_output_format(&pcm_s16le_oformat);
507 av_register_input_format(&pcm_s16be_iformat);
508 av_register_output_format(&pcm_s16be_oformat);
509 av_register_input_format(&pcm_u16le_iformat);
510 av_register_output_format(&pcm_u16le_oformat);
511 av_register_input_format(&pcm_u16be_iformat);
512 av_register_output_format(&pcm_u16be_oformat);
513 av_register_input_format(&pcm_s8_iformat);
514 av_register_output_format(&pcm_s8_oformat);
515 av_register_input_format(&pcm_u8_iformat);
516 av_register_output_format(&pcm_u8_oformat);
517 av_register_input_format(&pcm_mulaw_iformat);
518 av_register_output_format(&pcm_mulaw_oformat);
519 av_register_input_format(&pcm_alaw_iformat);
520 av_register_output_format(&pcm_alaw_oformat);
521
522 av_register_input_format(&rawvideo_iformat);
523 av_register_output_format(&rawvideo_oformat);
87bdd3e5
FB
524
525 av_register_output_format(&null_oformat);
c9a65ca8
FB
526 return 0;
527}