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
21 #ifdef CONFIG_ENCODERS
23 static int raw_write_header(struct AVFormatContext *s)
28 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
30 put_buffer(&s->pb, pkt->data, pkt->size);
31 put_flush_packet(&s->pb);
35 static int raw_write_trailer(struct AVFormatContext *s)
39 #endif //CONFIG_ENCODERS
42 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
47 st = av_new_stream(s, 0);
51 id = s->iformat->value;
52 if (id == CODEC_ID_RAWVIDEO) {
53 st->codec.codec_type = CODEC_TYPE_VIDEO;
55 st->codec.codec_type = CODEC_TYPE_AUDIO;
57 st->codec.codec_id = id;
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;
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;
80 #define RAW_PACKET_SIZE 1024
82 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
85 // AVStream *st = s->streams[0];
87 size= RAW_PACKET_SIZE;
89 if (av_new_packet(pkt, size) < 0)
92 pkt->stream_index = 0;
93 ret = get_buffer(&s->pb, pkt->data, size);
98 /* note: we need to modify the packet size here to handle the last
104 static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
108 size = RAW_PACKET_SIZE;
110 if (av_new_packet(pkt, size) < 0)
113 pkt->stream_index = 0;
114 ret = get_partial_buffer(&s->pb, pkt->data, size);
123 static int raw_read_close(AVFormatContext *s)
128 int pcm_read_seek(AVFormatContext *s,
129 int stream_index, int64_t timestamp)
132 int block_align, byte_rate;
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;
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;
152 block_align = st->codec.block_align;
153 byte_rate = st->codec.bit_rate / 8;
157 if (block_align <= 0 || byte_rate <= 0)
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;
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);
171 static int ac3_read_header(AVFormatContext *s,
172 AVFormatParameters *ap)
176 st = av_new_stream(s, 0);
178 return AVERROR_NOMEM;
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 */
188 static int dts_read_header(AVFormatContext *s,
189 AVFormatParameters *ap)
193 st = av_new_stream(s, 0);
195 return AVERROR_NOMEM;
197 st->codec.codec_type = CODEC_TYPE_AUDIO;
198 st->codec.codec_id = CODEC_ID_DTS;
199 st->need_parsing = 1;
200 /* the parameters will be extracted from the compressed bitstream */
204 /* mpeg1/h263 input */
205 static int video_read_header(AVFormatContext *s,
206 AVFormatParameters *ap)
210 st = av_new_stream(s, 0);
212 return AVERROR_NOMEM;
214 st->codec.codec_type = CODEC_TYPE_VIDEO;
215 st->codec.codec_id = s->iformat->value;
216 st->need_parsing = 1;
218 /* for mjpeg, specify frame rate */
219 /* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/
220 if (st->codec.codec_id == CODEC_ID_MJPEG ||
221 st->codec.codec_id == CODEC_ID_MPEG4) {
222 if (ap && ap->frame_rate) {
223 st->codec.frame_rate = ap->frame_rate;
224 st->codec.frame_rate_base = ap->frame_rate_base;
226 st->codec.frame_rate = 25;
227 st->codec.frame_rate_base = 1;
233 #define SEQ_START_CODE 0x000001b3
234 #define GOP_START_CODE 0x000001b8
235 #define PICTURE_START_CODE 0x00000100
237 /* XXX: improve that by looking at several start codes */
238 static int mpegvideo_probe(AVProbeData *p)
243 /* we search the first start code. If it is a sequence, gop or
244 picture start code then we decide it is an mpeg video
245 stream. We do not send highest value to give a chance to mpegts */
246 /* NOTE: the search range was restricted to avoid too many false
252 code = (d[0] << 24) | (d[1] << 16) | (d[2] << 8) | (d[3]);
253 if ((code & 0xffffff00) == 0x100) {
254 if (code == SEQ_START_CODE ||
255 code == GOP_START_CODE ||
256 code == PICTURE_START_CODE)
264 static int h263_probe(AVProbeData *p)
272 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
279 static int h261_probe(AVProbeData *p)
287 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
294 AVInputFormat ac3_iformat = {
300 raw_read_partial_packet,
305 #ifdef CONFIG_ENCODERS
306 AVOutputFormat ac3_oformat = {
318 #endif //CONFIG_ENCODERS
320 AVInputFormat dts_iformat = {
326 raw_read_partial_packet,
331 AVInputFormat h261_iformat = {
337 raw_read_partial_packet,
339 .extensions = "h261",
340 .value = CODEC_ID_H261,
343 AVInputFormat h263_iformat = {
349 raw_read_partial_packet,
351 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
352 .value = CODEC_ID_H263,
355 #ifdef CONFIG_ENCODERS
356 AVOutputFormat h263_oformat = {
368 #endif //CONFIG_ENCODERS
370 AVInputFormat m4v_iformat = {
372 "raw MPEG4 video format",
374 NULL /*mpegvideo_probe*/,
376 raw_read_partial_packet,
378 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
379 .value = CODEC_ID_MPEG4,
382 #ifdef CONFIG_ENCODERS
383 AVOutputFormat m4v_oformat = {
385 "raw MPEG4 video format",
395 #endif //CONFIG_ENCODERS
397 AVInputFormat h264_iformat = {
399 "raw H264 video format",
401 NULL /*mpegvideo_probe*/,
403 raw_read_partial_packet,
405 .extensions = "h26l,h264", //FIXME remove after writing mpeg4_probe
406 .value = CODEC_ID_H264,
409 #ifdef CONFIG_ENCODERS
410 AVOutputFormat h264_oformat = {
412 "raw H264 video format",
422 #endif //CONFIG_ENCODERS
424 AVInputFormat mpegvideo_iformat = {
430 raw_read_partial_packet,
432 .value = CODEC_ID_MPEG1VIDEO,
435 #ifdef CONFIG_ENCODERS
436 AVOutputFormat mpeg1video_oformat = {
448 #endif //CONFIG_ENCODERS
450 AVInputFormat mjpeg_iformat = {
456 raw_read_partial_packet,
458 .extensions = "mjpg,mjpeg",
459 .value = CODEC_ID_MJPEG,
462 #ifdef CONFIG_ENCODERS
463 AVOutputFormat mjpeg_oformat = {
475 #endif //CONFIG_ENCODERS
479 #define PCMINPUTDEF(name, long_name, ext, codec) \
480 AVInputFormat pcm_ ## name ## _iformat = {\
493 #if !defined(CONFIG_ENCODERS) && defined(CONFIG_DECODERS)
495 #define PCMDEF(name, long_name, ext, codec) \
496 PCMINPUTDEF(name, long_name, ext, codec)
500 #define PCMDEF(name, long_name, ext, codec) \
501 PCMINPUTDEF(name, long_name, ext, codec)\
503 AVOutputFormat pcm_ ## name ## _oformat = {\
515 #endif //CONFIG_ENCODERS
517 #ifdef WORDS_BIGENDIAN
519 #define LE_DEF(s) NULL
521 #define BE_DEF(s) NULL
526 PCMDEF(s16le, "pcm signed 16 bit little endian format",
527 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
529 PCMDEF(s16be, "pcm signed 16 bit big endian format",
530 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
532 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
533 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
535 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
536 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
538 PCMDEF(s8, "pcm signed 8 bit format",
539 "sb", CODEC_ID_PCM_S8)
541 PCMDEF(u8, "pcm unsigned 8 bit format",
542 "ub", CODEC_ID_PCM_U8)
544 PCMDEF(mulaw, "pcm mu law format",
545 "ul", CODEC_ID_PCM_MULAW)
547 PCMDEF(alaw, "pcm A law format",
548 "al", CODEC_ID_PCM_ALAW)
550 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
552 int packet_size, ret, width, height;
553 AVStream *st = s->streams[0];
555 width = st->codec.width;
556 height = st->codec.height;
558 packet_size = avpicture_get_size(st->codec.pix_fmt, width, height);
562 if (av_new_packet(pkt, packet_size) < 0)
565 pkt->stream_index = 0;
567 /* bypass buffered I/O */
568 ret = url_read(url_fileno(&s->pb), pkt->data, pkt->size);
570 ret = get_buffer(&s->pb, pkt->data, pkt->size);
572 if (ret != pkt->size) {
580 AVInputFormat rawvideo_iformat = {
586 rawvideo_read_packet,
589 .value = CODEC_ID_RAWVIDEO,
592 #ifdef CONFIG_ENCODERS
593 AVOutputFormat rawvideo_oformat = {
605 #endif //CONFIG_ENCODERS
607 #ifdef CONFIG_ENCODERS
608 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
613 AVOutputFormat null_oformat = {
619 #ifdef WORDS_BIGENDIAN
628 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE,
630 #endif //CONFIG_ENCODERS
632 #ifndef CONFIG_ENCODERS
633 #define av_register_output_format(format)
635 #ifndef CONFIG_DECODERS
636 #define av_register_input_format(format)
641 av_register_input_format(&ac3_iformat);
642 av_register_output_format(&ac3_oformat);
644 av_register_input_format(&dts_iformat);
646 av_register_input_format(&h261_iformat);
648 av_register_input_format(&h263_iformat);
649 av_register_output_format(&h263_oformat);
651 av_register_input_format(&m4v_iformat);
652 av_register_output_format(&m4v_oformat);
654 av_register_input_format(&h264_iformat);
655 av_register_output_format(&h264_oformat);
657 av_register_input_format(&mpegvideo_iformat);
658 av_register_output_format(&mpeg1video_oformat);
660 av_register_input_format(&mjpeg_iformat);
661 av_register_output_format(&mjpeg_oformat);
663 av_register_input_format(&pcm_s16le_iformat);
664 av_register_output_format(&pcm_s16le_oformat);
665 av_register_input_format(&pcm_s16be_iformat);
666 av_register_output_format(&pcm_s16be_oformat);
667 av_register_input_format(&pcm_u16le_iformat);
668 av_register_output_format(&pcm_u16le_oformat);
669 av_register_input_format(&pcm_u16be_iformat);
670 av_register_output_format(&pcm_u16be_oformat);
671 av_register_input_format(&pcm_s8_iformat);
672 av_register_output_format(&pcm_s8_oformat);
673 av_register_input_format(&pcm_u8_iformat);
674 av_register_output_format(&pcm_u8_oformat);
675 av_register_input_format(&pcm_mulaw_iformat);
676 av_register_output_format(&pcm_mulaw_oformat);
677 av_register_input_format(&pcm_alaw_iformat);
678 av_register_output_format(&pcm_alaw_oformat);
680 av_register_input_format(&rawvideo_iformat);
681 av_register_output_format(&rawvideo_oformat);
683 av_register_output_format(&null_oformat);