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[libav.git] / libavformat / raw.c
CommitLineData
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1/*
2 * RAW encoder and decoder
19720f15 3 * Copyright (c) 2001 Fabrice Bellard.
de6d9b64 4 *
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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
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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 */
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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/* mpeg1/h263 input */
188static int video_read_header(AVFormatContext *s,
189 AVFormatParameters *ap)
190{
191 AVStream *st;
192
c9a65ca8 193 st = av_new_stream(s, 0);
de6d9b64 194 if (!st)
c9a65ca8 195 return AVERROR_NOMEM;
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196
197 st->codec.codec_type = CODEC_TYPE_VIDEO;
c9a65ca8 198 st->codec.codec_id = s->iformat->value;
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199 st->need_parsing = 1;
200
27e084bd 201 /* for mjpeg, specify frame rate */
7866eeff 202 /* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/
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203 if (st->codec.codec_id == CODEC_ID_MJPEG ||
204 st->codec.codec_id == CODEC_ID_MPEG4) {
205 if (ap && ap->frame_rate) {
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206 st->codec.frame_rate = ap->frame_rate;
207 st->codec.frame_rate_base = ap->frame_rate_base;
27e084bd 208 } else {
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209 st->codec.frame_rate = 25;
210 st->codec.frame_rate_base = 1;
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211 }
212 }
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213 return 0;
214}
215
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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 */
221static int mpegvideo_probe(AVProbeData *p)
222{
fa777321
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223 int code;
224 const uint8_t *d;
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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 */
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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;
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243 }
244 return 0;
245}
246
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247static 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
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262static 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
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277AVInputFormat ac3_iformat = {
278 "ac3",
279 "raw ac3",
280 0,
281 NULL,
cd66005d 282 ac3_read_header,
e15dec10 283 raw_read_partial_packet,
de6d9b64 284 raw_read_close,
bb76a117 285 .extensions = "ac3",
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286};
287
764ef400 288#ifdef CONFIG_ENCODERS
c9a65ca8 289AVOutputFormat ac3_oformat = {
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290 "ac3",
291 "raw ac3",
292 "audio/x-ac3",
293 "ac3",
c9a65ca8 294 0,
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295 CODEC_ID_AC3,
296 0,
297 raw_write_header,
298 raw_write_packet,
299 raw_write_trailer,
300};
764ef400 301#endif //CONFIG_ENCODERS
de6d9b64 302
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303AVInputFormat 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
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315AVInputFormat h263_iformat = {
316 "h263",
317 "raw h263",
318 0,
319 h263_probe,
320 video_read_header,
e15dec10 321 raw_read_partial_packet,
d07f9043
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322 raw_read_close,
323// .extensions = "h263", //FIXME remove after writing mpeg4_probe
324 .value = CODEC_ID_H263,
325};
326
764ef400 327#ifdef CONFIG_ENCODERS
c9a65ca8 328AVOutputFormat h263_oformat = {
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329 "h263",
330 "raw h263",
331 "video/x-h263",
332 "h263",
333 0,
c9a65ca8 334 0,
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335 CODEC_ID_H263,
336 raw_write_header,
337 raw_write_packet,
338 raw_write_trailer,
c9a65ca8 339};
764ef400 340#endif //CONFIG_ENCODERS
c9a65ca8 341
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342AVInputFormat m4v_iformat = {
343 "m4v",
344 "raw MPEG4 video format",
345 0,
2f0f5b20 346 NULL /*mpegvideo_probe*/,
7866eeff 347 video_read_header,
e15dec10 348 raw_read_partial_packet,
7866eeff 349 raw_read_close,
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350 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
351 .value = CODEC_ID_MPEG4,
7866eeff
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352};
353
764ef400 354#ifdef CONFIG_ENCODERS
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355AVOutputFormat 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};
764ef400 367#endif //CONFIG_ENCODERS
89b3d7c9 368
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369AVInputFormat h264_iformat = {
370 "h264",
371 "raw H264 video format",
372 0,
373 NULL /*mpegvideo_probe*/,
374 video_read_header,
e15dec10 375 raw_read_partial_packet,
0da71265
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376 raw_read_close,
377 .extensions = "h26l,h264", //FIXME remove after writing mpeg4_probe
378 .value = CODEC_ID_H264,
379};
380
764ef400 381#ifdef CONFIG_ENCODERS
0da71265
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382AVOutputFormat 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};
764ef400 394#endif //CONFIG_ENCODERS
0da71265 395
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396AVInputFormat mpegvideo_iformat = {
397 "mpegvideo",
398 "MPEG video",
399 0,
400 mpegvideo_probe,
de6d9b64 401 video_read_header,
e15dec10 402 raw_read_partial_packet,
de6d9b64 403 raw_read_close,
bb76a117 404 .value = CODEC_ID_MPEG1VIDEO,
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405};
406
764ef400 407#ifdef CONFIG_ENCODERS
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408AVOutputFormat mpeg1video_oformat = {
409 "mpeg1video",
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410 "MPEG video",
411 "video/x-mpeg",
412 "mpg,mpeg",
413 0,
c9a65ca8 414 0,
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415 CODEC_ID_MPEG1VIDEO,
416 raw_write_header,
417 raw_write_packet,
418 raw_write_trailer,
de6d9b64 419};
764ef400 420#endif //CONFIG_ENCODERS
de6d9b64 421
c9a65ca8 422AVInputFormat mjpeg_iformat = {
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423 "mjpeg",
424 "MJPEG video",
27e084bd 425 0,
c9a65ca8 426 NULL,
27e084bd 427 video_read_header,
e15dec10 428 raw_read_partial_packet,
27e084bd 429 raw_read_close,
bb76a117
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430 .extensions = "mjpg,mjpeg",
431 .value = CODEC_ID_MJPEG,
27e084bd
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432};
433
764ef400 434#ifdef CONFIG_ENCODERS
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435AVOutputFormat mjpeg_oformat = {
436 "mjpeg",
437 "MJPEG video",
438 "video/x-mjpeg",
439 "mjpg,mjpeg",
5ed8fafc 440 0,
5ed8fafc 441 0,
c9a65ca8 442 CODEC_ID_MJPEG,
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443 raw_write_header,
444 raw_write_packet,
445 raw_write_trailer,
5ed8fafc 446};
764ef400 447#endif //CONFIG_ENCODERS
5ed8fafc 448
c9a65ca8 449/* pcm formats */
764ef400 450
4986a429 451#define PCMINPUTDEF(name, long_name, ext, codec) \
764ef400
MM
452AVInputFormat pcm_ ## name ## _iformat = {\
453 #name,\
454 long_name,\
455 0,\
456 NULL,\
457 raw_read_header,\
458 raw_read_packet,\
459 raw_read_close,\
4986a429 460 pcm_read_seek,\
764ef400
MM
461 .extensions = ext,\
462 .value = codec,\
463};
464
4986a429
FB
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
764ef400 470#else
5ed8fafc 471
c9a65ca8 472#define PCMDEF(name, long_name, ext, codec) \
4986a429 473 PCMINPUTDEF(name, long_name, ext, codec)\
c9a65ca8
FB
474\
475AVOutputFormat 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,\
5ed8fafc 486};
764ef400 487#endif //CONFIG_ENCODERS
5ed8fafc 488
5ed8fafc 489#ifdef WORDS_BIGENDIAN
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490#define BE_DEF(s) s
491#define LE_DEF(s) NULL
5ed8fafc 492#else
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493#define BE_DEF(s) NULL
494#define LE_DEF(s) s
5ed8fafc 495#endif
5ed8fafc 496
5ed8fafc 497
c9a65ca8
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498PCMDEF(s16le, "pcm signed 16 bit little endian format",
499 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
5ed8fafc 500
c9a65ca8
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501PCMDEF(s16be, "pcm signed 16 bit big endian format",
502 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
5ed8fafc 503
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504PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
505 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
5ed8fafc 506
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507PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
508 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
5ed8fafc 509
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510PCMDEF(s8, "pcm signed 8 bit format",
511 "sb", CODEC_ID_PCM_S8)
5ed8fafc 512
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513PCMDEF(u8, "pcm unsigned 8 bit format",
514 "ub", CODEC_ID_PCM_U8)
5ed8fafc 515
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516PCMDEF(mulaw, "pcm mu law format",
517 "ul", CODEC_ID_PCM_MULAW)
de6d9b64 518
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519PCMDEF(alaw, "pcm A law format",
520 "al", CODEC_ID_PCM_ALAW)
de6d9b64 521
5c91a675 522static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
de6d9b64
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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
63167088
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530 packet_size = avpicture_get_size(st->codec.pix_fmt, width, height);
531 if (packet_size < 0)
42343f7e 532 av_abort();
de6d9b64
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533
534 if (av_new_packet(pkt, packet_size) < 0)
0bd586c5 535 return AVERROR_IO;
de6d9b64
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536
537 pkt->stream_index = 0;
c2c2cd2d 538#if 0
de6d9b64
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539 /* bypass buffered I/O */
540 ret = url_read(url_fileno(&s->pb), pkt->data, pkt->size);
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541#else
542 ret = get_buffer(&s->pb, pkt->data, pkt->size);
543#endif
de6d9b64
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544 if (ret != pkt->size) {
545 av_free_packet(pkt);
0bd586c5 546 return AVERROR_IO;
de6d9b64
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547 } else {
548 return 0;
549 }
550}
551
c9a65ca8
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552AVInputFormat rawvideo_iformat = {
553 "rawvideo",
554 "raw video format",
555 0,
556 NULL,
557 raw_read_header,
558 rawvideo_read_packet,
559 raw_read_close,
bb76a117
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560 .extensions = "yuv",
561 .value = CODEC_ID_RAWVIDEO,
c9a65ca8
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562};
563
764ef400 564#ifdef CONFIG_ENCODERS
c9a65ca8 565AVOutputFormat rawvideo_oformat = {
de6d9b64
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566 "rawvideo",
567 "raw video format",
568 NULL,
569 "yuv",
c9a65ca8 570 0,
de6d9b64
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571 CODEC_ID_NONE,
572 CODEC_ID_RAWVIDEO,
573 raw_write_header,
574 raw_write_packet,
575 raw_write_trailer,
de6d9b64 576};
764ef400 577#endif //CONFIG_ENCODERS
c9a65ca8 578
764ef400 579#ifdef CONFIG_ENCODERS
e928649b 580static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
87bdd3e5
FB
581{
582 return 0;
583}
584
585AVOutputFormat 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,
b1d89f82 600 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE,
87bdd3e5 601};
764ef400
MM
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
87bdd3e5 610
c9a65ca8
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611int raw_init(void)
612{
c9a65ca8
FB
613 av_register_input_format(&ac3_iformat);
614 av_register_output_format(&ac3_oformat);
615
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MN
616 av_register_input_format(&h261_iformat);
617
d07f9043 618 av_register_input_format(&h263_iformat);
c9a65ca8 619 av_register_output_format(&h263_oformat);
89b3d7c9 620
7866eeff 621 av_register_input_format(&m4v_iformat);
89b3d7c9 622 av_register_output_format(&m4v_oformat);
0da71265
MN
623
624 av_register_input_format(&h264_iformat);
625 av_register_output_format(&h264_oformat);
c9a65ca8
FB
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);
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652
653 av_register_output_format(&null_oformat);
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654 return 0;
655}