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
23 #include "ac3_parser.h"
28 static int flac_write_header(struct AVFormatContext *s)
30 static const uint8_t header[8] = {
31 0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22
33 uint8_t *streaminfo = s->streams[0]->codec->extradata;
34 int len = s->streams[0]->codec->extradata_size;
35 if(streaminfo != NULL && len > 0) {
36 put_buffer(&s->pb, header, 8);
37 put_buffer(&s->pb, streaminfo, len);
43 static int roq_write_header(struct AVFormatContext *s)
45 static const uint8_t header[] = {
46 0x84, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, 0x1E, 0x00
49 put_buffer(&s->pb, header, 8);
50 put_flush_packet(&s->pb);
55 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
57 put_buffer(&s->pb, pkt->data, pkt->size);
58 put_flush_packet(&s->pb);
61 #endif //CONFIG_MUXERS
64 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
69 st = av_new_stream(s, 0);
71 return AVERROR(ENOMEM);
73 id = s->iformat->value;
74 if (id == CODEC_ID_RAWVIDEO) {
75 st->codec->codec_type = CODEC_TYPE_VIDEO;
77 st->codec->codec_type = CODEC_TYPE_AUDIO;
79 st->codec->codec_id = id;
81 switch(st->codec->codec_type) {
82 case CODEC_TYPE_AUDIO:
83 st->codec->sample_rate = ap->sample_rate;
84 st->codec->channels = ap->channels;
85 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
87 case CODEC_TYPE_VIDEO:
88 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
89 st->codec->width = ap->width;
90 st->codec->height = ap->height;
91 st->codec->pix_fmt = ap->pix_fmt;
92 if(st->codec->pix_fmt == PIX_FMT_NONE)
93 st->codec->pix_fmt= PIX_FMT_YUV420P;
101 #define RAW_PACKET_SIZE 1024
103 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
106 // AVStream *st = s->streams[0];
108 size= RAW_PACKET_SIZE;
110 ret= av_get_packet(&s->pb, pkt, size);
112 pkt->stream_index = 0;
116 /* note: we need to modify the packet size here to handle the last
122 static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
126 size = RAW_PACKET_SIZE;
128 if (av_new_packet(pkt, size) < 0)
131 pkt->pos= url_ftell(&s->pb);
132 pkt->stream_index = 0;
133 ret = get_partial_buffer(&s->pb, pkt->data, size);
142 // http://www.artificis.hu/files/texts/ingenient.txt
143 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
145 int ret, size, w, h, unk1, unk2;
147 if (get_le32(&s->pb) != MKTAG('M', 'J', 'P', 'G'))
148 return AVERROR(EIO); // FIXME
150 size = get_le32(&s->pb);
152 w = get_le16(&s->pb);
153 h = get_le16(&s->pb);
155 url_fskip(&s->pb, 8); // zero + size (padded?)
156 url_fskip(&s->pb, 2);
157 unk1 = get_le16(&s->pb);
158 unk2 = get_le16(&s->pb);
159 url_fskip(&s->pb, 22); // ascii timestamp
161 av_log(NULL, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
162 size, w, h, unk1, unk2);
164 if (av_new_packet(pkt, size) < 0)
167 pkt->pos = url_ftell(&s->pb);
168 pkt->stream_index = 0;
169 ret = get_buffer(&s->pb, pkt->data, size);
178 static int raw_read_close(AVFormatContext *s)
183 int pcm_read_seek(AVFormatContext *s,
184 int stream_index, int64_t timestamp, int flags)
187 int block_align, byte_rate;
192 block_align = st->codec->block_align ? st->codec->block_align :
193 (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
194 byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 :
195 block_align * st->codec->sample_rate;
197 if (block_align <= 0 || byte_rate <= 0)
200 /* compute the position by aligning it to block_align */
201 pos = av_rescale_rnd(timestamp * byte_rate,
203 st->time_base.den * (int64_t)block_align,
204 (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
207 /* recompute exact position */
208 st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
209 url_fseek(&s->pb, pos + s->data_offset, SEEK_SET);
214 static int ac3_read_header(AVFormatContext *s,
215 AVFormatParameters *ap)
219 st = av_new_stream(s, 0);
221 return AVERROR(ENOMEM);
223 st->codec->codec_type = CODEC_TYPE_AUDIO;
224 st->codec->codec_id = CODEC_ID_AC3;
225 st->need_parsing = AVSTREAM_PARSE_FULL;
226 /* the parameters will be extracted from the compressed bitstream */
230 static int shorten_read_header(AVFormatContext *s,
231 AVFormatParameters *ap)
235 st = av_new_stream(s, 0);
237 return AVERROR(ENOMEM);
238 st->codec->codec_type = CODEC_TYPE_AUDIO;
239 st->codec->codec_id = CODEC_ID_SHORTEN;
240 st->need_parsing = AVSTREAM_PARSE_FULL;
241 /* the parameters will be extracted from the compressed bitstream */
246 static int flac_read_header(AVFormatContext *s,
247 AVFormatParameters *ap)
251 st = av_new_stream(s, 0);
253 return AVERROR(ENOMEM);
254 st->codec->codec_type = CODEC_TYPE_AUDIO;
255 st->codec->codec_id = CODEC_ID_FLAC;
256 st->need_parsing = AVSTREAM_PARSE_FULL;
257 /* the parameters will be extracted from the compressed bitstream */
262 static int dts_read_header(AVFormatContext *s,
263 AVFormatParameters *ap)
267 st = av_new_stream(s, 0);
269 return AVERROR(ENOMEM);
271 st->codec->codec_type = CODEC_TYPE_AUDIO;
272 st->codec->codec_id = CODEC_ID_DTS;
273 st->need_parsing = AVSTREAM_PARSE_FULL;
274 /* the parameters will be extracted from the compressed bitstream */
279 static int aac_read_header(AVFormatContext *s,
280 AVFormatParameters *ap)
284 st = av_new_stream(s, 0);
286 return AVERROR(ENOMEM);
288 st->codec->codec_type = CODEC_TYPE_AUDIO;
289 st->codec->codec_id = CODEC_ID_AAC;
290 st->need_parsing = AVSTREAM_PARSE_FULL;
291 /* the parameters will be extracted from the compressed bitstream */
295 /* mpeg1/h263 input */
296 static int video_read_header(AVFormatContext *s,
297 AVFormatParameters *ap)
301 st = av_new_stream(s, 0);
303 return AVERROR(ENOMEM);
305 st->codec->codec_type = CODEC_TYPE_VIDEO;
306 st->codec->codec_id = s->iformat->value;
307 st->need_parsing = AVSTREAM_PARSE_FULL;
309 /* for mjpeg, specify frame rate */
310 /* for mpeg4 specify it too (most mpeg4 streams do not have the fixed_vop_rate set ...)*/
311 if (ap->time_base.num) {
312 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
313 } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
314 st->codec->codec_id == CODEC_ID_MPEG4 ||
315 st->codec->codec_id == CODEC_ID_H264) {
316 av_set_pts_info(st, 64, 1, 25);
322 #define SEQ_START_CODE 0x000001b3
323 #define GOP_START_CODE 0x000001b8
324 #define PICTURE_START_CODE 0x00000100
325 #define SLICE_START_CODE 0x00000101
326 #define PACK_START_CODE 0x000001ba
327 #define VIDEO_ID 0x000001e0
328 #define AUDIO_ID 0x000001c0
330 static int mpegvideo_probe(AVProbeData *p)
333 int pic=0, seq=0, slice=0, pspack=0, pes=0;
336 for(i=0; i<p->buf_size; i++){
337 code = (code<<8) + p->buf[i];
338 if ((code & 0xffffff00) == 0x100) {
340 case SEQ_START_CODE: seq++; break;
341 case PICTURE_START_CODE: pic++; break;
342 case SLICE_START_CODE: slice++; break;
343 case PACK_START_CODE: pspack++; break;
345 if ((code & 0x1f0) == VIDEO_ID) pes++;
346 else if((code & 0x1e0) == AUDIO_ID) pes++;
349 if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
350 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
354 #define VISUAL_OBJECT_START_CODE 0x000001b5
355 #define VOP_START_CODE 0x000001b6
357 static int mpeg4video_probe(AVProbeData *probe_packet)
359 uint32_t temp_buffer= -1;
360 int VO=0, VOL=0, VOP = 0, VISO = 0, res=0;
363 for(i=0; i<probe_packet->buf_size; i++){
364 temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
365 if ((temp_buffer & 0xffffff00) != 0x100)
368 if (temp_buffer == VOP_START_CODE) VOP++;
369 else if (temp_buffer == VISUAL_OBJECT_START_CODE) VISO++;
370 else if (temp_buffer < 0x120) VO++;
371 else if (temp_buffer < 0x130) VOL++;
372 else if ( !(0x1AF < temp_buffer && temp_buffer < 0x1B7)
373 && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++;
376 if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0)
377 return AVPROBE_SCORE_MAX/2;
381 static int h263_probe(AVProbeData *p)
387 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
394 static int h261_probe(AVProbeData *p)
400 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
407 static int ac3_probe(AVProbeData *p)
409 int max_frames, first_frames = 0, frames;
410 uint8_t *buf, *buf2, *end;
415 end = buf + p->buf_size;
417 for(; buf < end; buf++) {
420 for(frames = 0; buf2 < end; frames++) {
421 if(ff_ac3_parse_header(buf2, &hdr) < 0)
423 buf2 += hdr.frame_size;
425 max_frames = FFMAX(max_frames, frames);
427 first_frames = frames;
429 if (first_frames>=3) return AVPROBE_SCORE_MAX * 3 / 4;
430 else if(max_frames>=3) return AVPROBE_SCORE_MAX / 2;
431 else if(max_frames>=1) return 1;
435 static int flac_probe(AVProbeData *p)
437 if(memcmp(p->buf, "fLaC", 4)) return 0;
438 else return AVPROBE_SCORE_MAX / 2;
441 AVInputFormat shorten_demuxer = {
447 raw_read_partial_packet,
449 .flags= AVFMT_GENERIC_INDEX,
453 AVInputFormat flac_demuxer = {
459 raw_read_partial_packet,
461 .flags= AVFMT_GENERIC_INDEX,
462 .extensions = "flac",
466 AVOutputFormat flac_muxer = {
476 .flags= AVFMT_NOTIMESTAMPS,
478 #endif //CONFIG_MUXERS
480 #ifdef CONFIG_AC3_DEMUXER
481 AVInputFormat ac3_demuxer = {
487 raw_read_partial_packet,
489 .flags= AVFMT_GENERIC_INDEX,
495 AVOutputFormat ac3_muxer = {
505 .flags= AVFMT_NOTIMESTAMPS,
507 #endif //CONFIG_MUXERS
509 AVInputFormat dts_demuxer = {
515 raw_read_partial_packet,
517 .flags= AVFMT_GENERIC_INDEX,
521 AVInputFormat aac_demuxer = {
527 raw_read_partial_packet,
529 .flags= AVFMT_GENERIC_INDEX,
533 #ifdef CONFIG_ROQ_MUXER
534 AVOutputFormat roq_muxer =
546 #endif //CONFIG_ROQ_MUXER
548 AVInputFormat h261_demuxer = {
554 raw_read_partial_packet,
556 .flags= AVFMT_GENERIC_INDEX,
557 .extensions = "h261",
558 .value = CODEC_ID_H261,
562 AVOutputFormat h261_muxer = {
572 .flags= AVFMT_NOTIMESTAMPS,
574 #endif //CONFIG_MUXERS
576 AVInputFormat h263_demuxer = {
582 raw_read_partial_packet,
584 .flags= AVFMT_GENERIC_INDEX,
585 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
586 .value = CODEC_ID_H263,
590 AVOutputFormat h263_muxer = {
600 .flags= AVFMT_NOTIMESTAMPS,
602 #endif //CONFIG_MUXERS
604 AVInputFormat m4v_demuxer = {
606 "raw MPEG4 video format",
608 mpeg4video_probe, /** probing for mpeg4 data */
610 raw_read_partial_packet,
612 .flags= AVFMT_GENERIC_INDEX,
613 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
614 .value = CODEC_ID_MPEG4,
618 AVOutputFormat m4v_muxer = {
620 "raw MPEG4 video format",
628 .flags= AVFMT_NOTIMESTAMPS,
630 #endif //CONFIG_MUXERS
632 AVInputFormat h264_demuxer = {
634 "raw H264 video format",
636 NULL /*mpegvideo_probe*/,
638 raw_read_partial_packet,
640 .flags= AVFMT_GENERIC_INDEX,
641 .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
642 .value = CODEC_ID_H264,
646 AVOutputFormat h264_muxer = {
648 "raw H264 video format",
656 .flags= AVFMT_NOTIMESTAMPS,
658 #endif //CONFIG_MUXERS
660 AVInputFormat mpegvideo_demuxer = {
666 raw_read_partial_packet,
668 .flags= AVFMT_GENERIC_INDEX,
669 .value = CODEC_ID_MPEG1VIDEO,
673 AVOutputFormat mpeg1video_muxer = {
683 .flags= AVFMT_NOTIMESTAMPS,
685 #endif //CONFIG_MUXERS
688 AVOutputFormat mpeg2video_muxer = {
698 .flags= AVFMT_NOTIMESTAMPS,
700 #endif //CONFIG_MUXERS
702 AVInputFormat mjpeg_demuxer = {
708 raw_read_partial_packet,
710 .flags= AVFMT_GENERIC_INDEX,
711 .extensions = "mjpg,mjpeg",
712 .value = CODEC_ID_MJPEG,
715 AVInputFormat ingenient_demuxer = {
721 ingenient_read_packet,
723 .flags= AVFMT_GENERIC_INDEX,
724 .extensions = "cgi", // FIXME
725 .value = CODEC_ID_MJPEG,
729 AVOutputFormat mjpeg_muxer = {
739 .flags= AVFMT_NOTIMESTAMPS,
741 #endif //CONFIG_MUXERS
743 AVInputFormat vc1_demuxer = {
747 NULL /* vc1_probe */,
749 raw_read_partial_packet,
752 .value = CODEC_ID_VC1,
757 #define PCMINPUTDEF(name, long_name, ext, codec) \
758 AVInputFormat pcm_ ## name ## _demuxer = {\
767 .flags= AVFMT_GENERIC_INDEX,\
772 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
773 AVOutputFormat pcm_ ## name ## _muxer = {\
783 .flags= AVFMT_NOTIMESTAMPS,\
787 #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
788 #define PCMDEF(name, long_name, ext, codec) \
789 PCMINPUTDEF(name, long_name, ext, codec)
790 #elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
791 #define PCMDEF(name, long_name, ext, codec) \
792 PCMOUTPUTDEF(name, long_name, ext, codec)
793 #elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
794 #define PCMDEF(name, long_name, ext, codec) \
795 PCMINPUTDEF(name, long_name, ext, codec)\
796 PCMOUTPUTDEF(name, long_name, ext, codec)
798 #define PCMDEF(name, long_name, ext, codec)
801 #ifdef WORDS_BIGENDIAN
803 #define LE_DEF(s) NULL
805 #define BE_DEF(s) NULL
810 PCMDEF(s16le, "pcm signed 16 bit little endian format",
811 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
813 PCMDEF(s16be, "pcm signed 16 bit big endian format",
814 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
816 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
817 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
819 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
820 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
822 PCMDEF(s8, "pcm signed 8 bit format",
823 "sb", CODEC_ID_PCM_S8)
825 PCMDEF(u8, "pcm unsigned 8 bit format",
826 "ub", CODEC_ID_PCM_U8)
828 PCMDEF(mulaw, "pcm mu law format",
829 "ul", CODEC_ID_PCM_MULAW)
831 PCMDEF(alaw, "pcm A law format",
832 "al", CODEC_ID_PCM_ALAW)
834 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
836 int packet_size, ret, width, height;
837 AVStream *st = s->streams[0];
839 width = st->codec->width;
840 height = st->codec->height;
842 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
846 ret= av_get_packet(&s->pb, pkt, packet_size);
848 pkt->stream_index = 0;
849 if (ret != packet_size) {
856 AVInputFormat rawvideo_demuxer = {
862 rawvideo_read_packet,
864 .flags= AVFMT_GENERIC_INDEX,
865 .extensions = "yuv,cif,qcif,rgb",
866 .value = CODEC_ID_RAWVIDEO,
870 AVOutputFormat rawvideo_muxer = {
880 .flags= AVFMT_NOTIMESTAMPS,
882 #endif //CONFIG_MUXERS
885 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
890 AVOutputFormat null_muxer = {
896 #ifdef WORDS_BIGENDIAN
904 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
906 #endif //CONFIG_MUXERS