2 * RAW muxer and demuxer
3 * Copyright (c) 2001 Fabrice Bellard.
4 * Copyright (c) 2005 Alex Beregszaszi
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 static int raw_write_header(struct AVFormatContext *s)
31 static int flac_write_header(struct AVFormatContext *s)
33 static const uint8_t header[8] = {
34 0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22
36 uint8_t *streaminfo = s->streams[0]->codec->extradata;
37 int len = s->streams[0]->codec->extradata_size;
38 if(streaminfo != NULL && len > 0) {
39 put_buffer(&s->pb, header, 8);
40 put_buffer(&s->pb, streaminfo, len);
45 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
47 put_buffer(&s->pb, pkt->data, pkt->size);
48 put_flush_packet(&s->pb);
52 static int raw_write_trailer(struct AVFormatContext *s)
56 #endif //CONFIG_MUXERS
59 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
64 st = av_new_stream(s, 0);
68 id = s->iformat->value;
69 if (id == CODEC_ID_RAWVIDEO) {
70 st->codec->codec_type = CODEC_TYPE_VIDEO;
72 st->codec->codec_type = CODEC_TYPE_AUDIO;
74 st->codec->codec_id = id;
76 switch(st->codec->codec_type) {
77 case CODEC_TYPE_AUDIO:
78 st->codec->sample_rate = ap->sample_rate;
79 st->codec->channels = ap->channels;
80 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
82 case CODEC_TYPE_VIDEO:
83 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
84 st->codec->width = ap->width;
85 st->codec->height = ap->height;
86 st->codec->pix_fmt = ap->pix_fmt;
87 if(st->codec->pix_fmt == PIX_FMT_NONE)
88 st->codec->pix_fmt= PIX_FMT_YUV420P;
96 #define RAW_PACKET_SIZE 1024
98 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
101 // AVStream *st = s->streams[0];
103 size= RAW_PACKET_SIZE;
105 ret= av_get_packet(&s->pb, pkt, size);
107 pkt->stream_index = 0;
111 /* note: we need to modify the packet size here to handle the last
117 static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
121 size = RAW_PACKET_SIZE;
123 if (av_new_packet(pkt, size) < 0)
126 pkt->pos= url_ftell(&s->pb);
127 pkt->stream_index = 0;
128 ret = get_partial_buffer(&s->pb, pkt->data, size);
137 // http://www.artificis.hu/files/texts/ingenient.txt
138 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
140 int ret, size, w, h, unk1, unk2;
142 if (get_le32(&s->pb) != MKTAG('M', 'J', 'P', 'G'))
143 return AVERROR_IO; // FIXME
145 size = get_le32(&s->pb);
147 w = get_le16(&s->pb);
148 h = get_le16(&s->pb);
150 url_fskip(&s->pb, 8); // zero + size (padded?)
151 url_fskip(&s->pb, 2);
152 unk1 = get_le16(&s->pb);
153 unk2 = get_le16(&s->pb);
154 url_fskip(&s->pb, 22); // ascii timestamp
156 av_log(NULL, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
157 size, w, h, unk1, unk2);
159 if (av_new_packet(pkt, size) < 0)
162 pkt->pos = url_ftell(&s->pb);
163 pkt->stream_index = 0;
164 ret = get_buffer(&s->pb, pkt->data, size);
173 static int raw_read_close(AVFormatContext *s)
178 int pcm_read_seek(AVFormatContext *s,
179 int stream_index, int64_t timestamp, int flags)
182 int block_align, byte_rate;
187 block_align = st->codec->block_align ? st->codec->block_align :
188 (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
189 byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 :
190 block_align * st->codec->sample_rate;
192 if (block_align <= 0 || byte_rate <= 0)
195 /* compute the position by aligning it to block_align */
196 pos = av_rescale_rnd(timestamp * byte_rate,
198 st->time_base.den * (int64_t)block_align,
199 (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
202 /* recompute exact position */
203 st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
204 url_fseek(&s->pb, pos + s->data_offset, SEEK_SET);
209 static int ac3_read_header(AVFormatContext *s,
210 AVFormatParameters *ap)
214 st = av_new_stream(s, 0);
216 return AVERROR_NOMEM;
218 st->codec->codec_type = CODEC_TYPE_AUDIO;
219 st->codec->codec_id = CODEC_ID_AC3;
220 st->need_parsing = 1;
221 /* the parameters will be extracted from the compressed bitstream */
225 static int shorten_read_header(AVFormatContext *s,
226 AVFormatParameters *ap)
230 st = av_new_stream(s, 0);
232 return AVERROR_NOMEM;
233 st->codec->codec_type = CODEC_TYPE_AUDIO;
234 st->codec->codec_id = CODEC_ID_SHORTEN;
235 st->need_parsing = 1;
236 /* the parameters will be extracted from the compressed bitstream */
241 static int flac_read_header(AVFormatContext *s,
242 AVFormatParameters *ap)
246 st = av_new_stream(s, 0);
248 return AVERROR_NOMEM;
249 st->codec->codec_type = CODEC_TYPE_AUDIO;
250 st->codec->codec_id = CODEC_ID_FLAC;
251 st->need_parsing = 1;
252 /* the parameters will be extracted from the compressed bitstream */
257 static int dts_read_header(AVFormatContext *s,
258 AVFormatParameters *ap)
262 st = av_new_stream(s, 0);
264 return AVERROR_NOMEM;
266 st->codec->codec_type = CODEC_TYPE_AUDIO;
267 st->codec->codec_id = CODEC_ID_DTS;
268 st->need_parsing = 1;
269 /* the parameters will be extracted from the compressed bitstream */
274 static int aac_read_header(AVFormatContext *s,
275 AVFormatParameters *ap)
279 st = av_new_stream(s, 0);
281 return AVERROR_NOMEM;
283 st->codec->codec_type = CODEC_TYPE_AUDIO;
284 st->codec->codec_id = CODEC_ID_AAC;
285 st->need_parsing = 1;
286 /* the parameters will be extracted from the compressed bitstream */
290 /* mpeg1/h263 input */
291 static int video_read_header(AVFormatContext *s,
292 AVFormatParameters *ap)
296 st = av_new_stream(s, 0);
298 return AVERROR_NOMEM;
300 st->codec->codec_type = CODEC_TYPE_VIDEO;
301 st->codec->codec_id = s->iformat->value;
302 st->need_parsing = 1;
304 /* for mjpeg, specify frame rate */
305 /* for mpeg4 specify it too (most mpeg4 streams dont have the fixed_vop_rate set ...)*/
306 if (ap->time_base.num) {
307 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
308 } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
309 st->codec->codec_id == CODEC_ID_MPEG4 ||
310 st->codec->codec_id == CODEC_ID_H264) {
311 av_set_pts_info(st, 64, 1, 25);
317 #define SEQ_START_CODE 0x000001b3
318 #define GOP_START_CODE 0x000001b8
319 #define PICTURE_START_CODE 0x00000100
320 #define SLICE_START_CODE 0x00000101
321 #define PACK_START_CODE 0x000001ba
322 #define VIDEO_ID 0x000001e0
323 #define AUDIO_ID 0x000001c0
325 static int mpegvideo_probe(AVProbeData *p)
328 int pic=0, seq=0, slice=0, pspack=0, pes=0;
331 for(i=0; i<p->buf_size; i++){
332 code = (code<<8) + p->buf[i];
333 if ((code & 0xffffff00) == 0x100) {
335 case SEQ_START_CODE: seq++; break;
336 case PICTURE_START_CODE: pic++; break;
337 case SLICE_START_CODE: slice++; break;
338 case PACK_START_CODE: pspack++; break;
340 case AUDIO_ID: pes++; break;
344 if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
345 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
349 #define VIDEO_OBJECT_START_CODE 0x00000100
350 #define VIDEO_OBJECT_LAYER_START_CODE 0x00000120
351 #define VISUAL_OBJECT_START_CODE 0x000001b5
352 #define VOP_START_CODE 0x000001b6
354 static int mpeg4video_probe(AVProbeData *probe_packet)
356 uint32_t temp_buffer= -1;
357 int VO=0, VOL=0, VOP = 0, VISO = 0;
360 for(i=0; i<probe_packet->buf_size; i++){
361 temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
362 if ((temp_buffer & 0xffffff00) == 0x100) {
364 case VOP_START_CODE: VOP++; break;
365 case VISUAL_OBJECT_START_CODE: VISO++; break;
367 switch(temp_buffer & 0xfffffff0){
368 case VIDEO_OBJECT_START_CODE: VO++; break;
369 case VIDEO_OBJECT_LAYER_START_CODE: VOL++; break;
374 if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0)
375 return AVPROBE_SCORE_MAX/2;
379 static int h263_probe(AVProbeData *p)
387 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
394 static int h261_probe(AVProbeData *p)
402 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
409 AVInputFormat shorten_demuxer = {
415 raw_read_partial_packet,
420 AVInputFormat flac_demuxer = {
426 raw_read_partial_packet,
428 .extensions = "flac",
432 AVOutputFormat flac_muxer = {
443 .flags= AVFMT_NOTIMESTAMPS,
445 #endif //CONFIG_MUXERS
447 AVInputFormat ac3_demuxer = {
453 raw_read_partial_packet,
459 AVOutputFormat ac3_muxer = {
470 .flags= AVFMT_NOTIMESTAMPS,
472 #endif //CONFIG_MUXERS
474 AVInputFormat dts_demuxer = {
480 raw_read_partial_packet,
485 AVInputFormat aac_demuxer = {
491 raw_read_partial_packet,
496 AVInputFormat h261_demuxer = {
502 raw_read_partial_packet,
504 .extensions = "h261",
505 .value = CODEC_ID_H261,
509 AVOutputFormat h261_muxer = {
520 .flags= AVFMT_NOTIMESTAMPS,
522 #endif //CONFIG_MUXERS
524 AVInputFormat h263_demuxer = {
530 raw_read_partial_packet,
532 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
533 .value = CODEC_ID_H263,
537 AVOutputFormat h263_muxer = {
548 .flags= AVFMT_NOTIMESTAMPS,
550 #endif //CONFIG_MUXERS
552 AVInputFormat m4v_demuxer = {
554 "raw MPEG4 video format",
556 mpeg4video_probe, /** probing for mpeg4 data */
558 raw_read_partial_packet,
560 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
561 .value = CODEC_ID_MPEG4,
565 AVOutputFormat m4v_muxer = {
567 "raw MPEG4 video format",
576 .flags= AVFMT_NOTIMESTAMPS,
578 #endif //CONFIG_MUXERS
580 AVInputFormat h264_demuxer = {
582 "raw H264 video format",
584 NULL /*mpegvideo_probe*/,
586 raw_read_partial_packet,
588 .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
589 .value = CODEC_ID_H264,
593 AVOutputFormat h264_muxer = {
595 "raw H264 video format",
604 .flags= AVFMT_NOTIMESTAMPS,
606 #endif //CONFIG_MUXERS
608 AVInputFormat mpegvideo_demuxer = {
614 raw_read_partial_packet,
616 .value = CODEC_ID_MPEG1VIDEO,
620 AVOutputFormat mpeg1video_muxer = {
631 .flags= AVFMT_NOTIMESTAMPS,
633 #endif //CONFIG_MUXERS
636 AVOutputFormat mpeg2video_muxer = {
647 .flags= AVFMT_NOTIMESTAMPS,
649 #endif //CONFIG_MUXERS
651 AVInputFormat mjpeg_demuxer = {
657 raw_read_partial_packet,
659 .extensions = "mjpg,mjpeg",
660 .value = CODEC_ID_MJPEG,
663 AVInputFormat ingenient_demuxer = {
669 ingenient_read_packet,
671 .extensions = "cgi", // FIXME
672 .value = CODEC_ID_MJPEG,
676 AVOutputFormat mjpeg_muxer = {
687 .flags= AVFMT_NOTIMESTAMPS,
689 #endif //CONFIG_MUXERS
693 #define PCMINPUTDEF(name, long_name, ext, codec) \
694 AVInputFormat pcm_ ## name ## _demuxer = {\
707 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
708 AVOutputFormat pcm_ ## name ## _muxer = {\
719 .flags= AVFMT_NOTIMESTAMPS,\
723 #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
724 #define PCMDEF(name, long_name, ext, codec) \
725 PCMINPUTDEF(name, long_name, ext, codec)
726 #elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
727 #define PCMDEF(name, long_name, ext, codec) \
728 PCMOUTPUTDEF(name, long_name, ext, codec)
729 #elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
730 #define PCMDEF(name, long_name, ext, codec) \
731 PCMINPUTDEF(name, long_name, ext, codec)\
732 PCMOUTPUTDEF(name, long_name, ext, codec)
734 #define PCMDEF(name, long_name, ext, codec)
737 #ifdef WORDS_BIGENDIAN
739 #define LE_DEF(s) NULL
741 #define BE_DEF(s) NULL
746 PCMDEF(s16le, "pcm signed 16 bit little endian format",
747 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
749 PCMDEF(s16be, "pcm signed 16 bit big endian format",
750 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
752 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
753 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
755 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
756 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
758 PCMDEF(s8, "pcm signed 8 bit format",
759 "sb", CODEC_ID_PCM_S8)
761 PCMDEF(u8, "pcm unsigned 8 bit format",
762 "ub", CODEC_ID_PCM_U8)
764 PCMDEF(mulaw, "pcm mu law format",
765 "ul", CODEC_ID_PCM_MULAW)
767 PCMDEF(alaw, "pcm A law format",
768 "al", CODEC_ID_PCM_ALAW)
770 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
772 int packet_size, ret, width, height;
773 AVStream *st = s->streams[0];
775 width = st->codec->width;
776 height = st->codec->height;
778 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
782 ret= av_get_packet(&s->pb, pkt, packet_size);
784 pkt->stream_index = 0;
785 if (ret != packet_size) {
792 AVInputFormat rawvideo_demuxer = {
798 rawvideo_read_packet,
800 .extensions = "yuv,cif,qcif",
801 .value = CODEC_ID_RAWVIDEO,
805 AVOutputFormat rawvideo_muxer = {
816 .flags= AVFMT_NOTIMESTAMPS,
818 #endif //CONFIG_MUXERS
821 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
826 AVOutputFormat null_muxer = {
832 #ifdef WORDS_BIGENDIAN
841 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
843 #endif //CONFIG_MUXERS