2 * RAW encoder and decoder
3 * Copyright (c) 2001 Fabrice Bellard.
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.
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.
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
22 int raw_write_header(struct AVFormatContext *s)
27 int raw_write_packet(struct AVFormatContext *s,
29 unsigned char *buf, int size, int force_pts)
31 put_buffer(&s->pb, buf, size);
32 put_flush_packet(&s->pb);
36 int raw_write_trailer(struct AVFormatContext *s)
42 static int raw_read_header(AVFormatContext *s,
43 AVFormatParameters *ap)
48 st = av_new_stream(s, 0);
52 id = s->iformat->value;
53 if (id == CODEC_ID_RAWVIDEO) {
54 st->codec.codec_type = CODEC_TYPE_VIDEO;
56 st->codec.codec_type = CODEC_TYPE_AUDIO;
58 st->codec.codec_id = id;
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;
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;
79 #define RAW_PACKET_SIZE 1024
81 int raw_read_packet(AVFormatContext *s,
86 if (av_new_packet(pkt, RAW_PACKET_SIZE) < 0)
89 pkt->stream_index = 0;
90 ret = get_buffer(&s->pb, pkt->data, RAW_PACKET_SIZE);
95 /* note: we need to modify the packet size here to handle the last
101 int raw_read_close(AVFormatContext *s)
107 static int mp3_read_header(AVFormatContext *s,
108 AVFormatParameters *ap)
112 st = av_new_stream(s, 0);
114 return AVERROR_NOMEM;
116 st->codec.codec_type = CODEC_TYPE_AUDIO;
117 st->codec.codec_id = CODEC_ID_MP2;
118 /* the parameters will be extracted from the compressed bitstream */
122 /* mpeg1/h263 input */
123 static int video_read_header(AVFormatContext *s,
124 AVFormatParameters *ap)
128 st = av_new_stream(s, 0);
130 return AVERROR_NOMEM;
132 st->codec.codec_type = CODEC_TYPE_VIDEO;
133 st->codec.codec_id = s->iformat->value;
134 /* for mjpeg, specify frame rate */
135 if (st->codec.codec_id == CODEC_ID_MJPEG) {
137 st->codec.frame_rate = ap->frame_rate;
139 st->codec.frame_rate = 25 * FRAME_RATE_BASE;
145 #define SEQ_START_CODE 0x000001b3
146 #define GOP_START_CODE 0x000001b8
147 #define PICTURE_START_CODE 0x00000100
149 /* XXX: improve that by looking at several start codes */
150 static int mpegvideo_probe(AVProbeData *p)
155 /* we search the first start code. If it is a sequence, gop or
156 picture start code then we decide it is an mpeg video
157 stream. We do not send highest value to give a chance to mpegts */
158 for(i=0;i<p->buf_size;i++) {
160 code = (code << 8) | c;
161 if ((code & 0xffffff00) == 0x100) {
162 if (code == SEQ_START_CODE ||
163 code == GOP_START_CODE ||
164 code == PICTURE_START_CODE)
165 return AVPROBE_SCORE_MAX - 1;
173 AVInputFormat mp3_iformat = {
181 extensions: "mp2,mp3", /* XXX: use probe */
184 AVOutputFormat mp2_oformat = {
186 "MPEG audio layer 2",
198 AVInputFormat ac3_iformat = {
210 AVOutputFormat ac3_oformat = {
223 AVOutputFormat h263_oformat = {
236 AVInputFormat mpegvideo_iformat = {
244 value: CODEC_ID_MPEG1VIDEO,
247 AVOutputFormat mpeg1video_oformat = {
260 AVInputFormat mjpeg_iformat = {
268 extensions: "mjpg,mjpeg",
269 value: CODEC_ID_MJPEG,
272 AVOutputFormat mjpeg_oformat = {
287 #define PCMDEF(name, long_name, ext, codec) \
288 AVInputFormat pcm_ ## name ## _iformat = {\
300 AVOutputFormat pcm_ ## name ## _oformat = {\
313 #ifdef WORDS_BIGENDIAN
315 #define LE_DEF(s) NULL
317 #define BE_DEF(s) NULL
322 PCMDEF(s16le, "pcm signed 16 bit little endian format",
323 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
325 PCMDEF(s16be, "pcm signed 16 bit big endian format",
326 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
328 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
329 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
331 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
332 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
334 PCMDEF(s8, "pcm signed 8 bit format",
335 "sb", CODEC_ID_PCM_S8)
337 PCMDEF(u8, "pcm unsigned 8 bit format",
338 "ub", CODEC_ID_PCM_U8)
340 PCMDEF(mulaw, "pcm mu law format",
341 "ul", CODEC_ID_PCM_MULAW)
343 PCMDEF(alaw, "pcm A law format",
344 "al", CODEC_ID_PCM_ALAW)
346 int rawvideo_read_packet(AVFormatContext *s,
349 int packet_size, ret, width, height;
350 AVStream *st = s->streams[0];
352 width = st->codec.width;
353 height = st->codec.height;
355 switch(st->codec.pix_fmt) {
356 case PIX_FMT_YUV420P:
357 packet_size = (width * height * 3) / 2;
360 packet_size = (width * height * 2);
364 packet_size = (width * height * 3);
371 if (av_new_packet(pkt, packet_size) < 0)
374 pkt->stream_index = 0;
375 /* bypass buffered I/O */
376 ret = url_read(url_fileno(&s->pb), pkt->data, pkt->size);
377 if (ret != pkt->size) {
385 AVInputFormat rawvideo_iformat = {
391 rawvideo_read_packet,
394 value: CODEC_ID_RAWVIDEO,
397 AVOutputFormat rawvideo_oformat = {
412 av_register_input_format(&mp3_iformat);
413 av_register_output_format(&mp2_oformat);
415 av_register_input_format(&ac3_iformat);
416 av_register_output_format(&ac3_oformat);
418 av_register_output_format(&h263_oformat);
420 av_register_input_format(&mpegvideo_iformat);
421 av_register_output_format(&mpeg1video_oformat);
423 av_register_input_format(&mjpeg_iformat);
424 av_register_output_format(&mjpeg_oformat);
426 av_register_input_format(&pcm_s16le_iformat);
427 av_register_output_format(&pcm_s16le_oformat);
428 av_register_input_format(&pcm_s16be_iformat);
429 av_register_output_format(&pcm_s16be_oformat);
430 av_register_input_format(&pcm_u16le_iformat);
431 av_register_output_format(&pcm_u16le_oformat);
432 av_register_input_format(&pcm_u16be_iformat);
433 av_register_output_format(&pcm_u16be_oformat);
434 av_register_input_format(&pcm_s8_iformat);
435 av_register_output_format(&pcm_s8_oformat);
436 av_register_input_format(&pcm_u8_iformat);
437 av_register_output_format(&pcm_u8_oformat);
438 av_register_input_format(&pcm_mulaw_iformat);
439 av_register_output_format(&pcm_mulaw_oformat);
440 av_register_input_format(&pcm_alaw_iformat);
441 av_register_output_format(&pcm_alaw_oformat);
443 av_register_input_format(&rawvideo_iformat);
444 av_register_output_format(&rawvideo_oformat);