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:
89 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
91 av_set_pts_info(st, 64, 1, 25);
92 st->codec->width = ap->width;
93 st->codec->height = ap->height;
94 st->codec->pix_fmt = ap->pix_fmt;
95 if(st->codec->pix_fmt == PIX_FMT_NONE)
96 st->codec->pix_fmt= PIX_FMT_YUV420P;
104 #define RAW_PACKET_SIZE 1024
106 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
109 // AVStream *st = s->streams[0];
111 size= RAW_PACKET_SIZE;
113 ret= av_get_packet(s->pb, pkt, size);
115 pkt->stream_index = 0;
119 /* note: we need to modify the packet size here to handle the last
123 bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
124 assert(bps); // if false there IS a bug elsewhere (NOT in this function)
126 pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);
131 static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
135 size = RAW_PACKET_SIZE;
137 if (av_new_packet(pkt, size) < 0)
140 pkt->pos= url_ftell(s->pb);
141 pkt->stream_index = 0;
142 ret = get_partial_buffer(s->pb, pkt->data, size);
151 // http://www.artificis.hu/files/texts/ingenient.txt
152 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
154 int ret, size, w, h, unk1, unk2;
156 if (get_le32(s->pb) != MKTAG('M', 'J', 'P', 'G'))
157 return AVERROR(EIO); // FIXME
159 size = get_le32(s->pb);
164 url_fskip(s->pb, 8); // zero + size (padded?)
166 unk1 = get_le16(s->pb);
167 unk2 = get_le16(s->pb);
168 url_fskip(s->pb, 22); // ascii timestamp
170 av_log(NULL, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
171 size, w, h, unk1, unk2);
173 if (av_new_packet(pkt, size) < 0)
176 pkt->pos = url_ftell(s->pb);
177 pkt->stream_index = 0;
178 ret = get_buffer(s->pb, pkt->data, size);
187 static int raw_read_close(AVFormatContext *s)
192 int pcm_read_seek(AVFormatContext *s,
193 int stream_index, int64_t timestamp, int flags)
196 int block_align, byte_rate;
201 block_align = st->codec->block_align ? st->codec->block_align :
202 (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
203 byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 :
204 block_align * st->codec->sample_rate;
206 if (block_align <= 0 || byte_rate <= 0)
209 /* compute the position by aligning it to block_align */
210 pos = av_rescale_rnd(timestamp * byte_rate,
212 st->time_base.den * (int64_t)block_align,
213 (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
216 /* recompute exact position */
217 st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
218 url_fseek(s->pb, pos + s->data_offset, SEEK_SET);
223 static int ac3_read_header(AVFormatContext *s,
224 AVFormatParameters *ap)
228 st = av_new_stream(s, 0);
230 return AVERROR(ENOMEM);
232 st->codec->codec_type = CODEC_TYPE_AUDIO;
233 st->codec->codec_id = CODEC_ID_AC3;
234 st->need_parsing = AVSTREAM_PARSE_FULL;
235 /* the parameters will be extracted from the compressed bitstream */
239 static int shorten_read_header(AVFormatContext *s,
240 AVFormatParameters *ap)
244 st = av_new_stream(s, 0);
246 return AVERROR(ENOMEM);
247 st->codec->codec_type = CODEC_TYPE_AUDIO;
248 st->codec->codec_id = CODEC_ID_SHORTEN;
249 st->need_parsing = AVSTREAM_PARSE_FULL;
250 /* the parameters will be extracted from the compressed bitstream */
255 static int flac_read_header(AVFormatContext *s,
256 AVFormatParameters *ap)
260 st = av_new_stream(s, 0);
262 return AVERROR(ENOMEM);
263 st->codec->codec_type = CODEC_TYPE_AUDIO;
264 st->codec->codec_id = CODEC_ID_FLAC;
265 st->need_parsing = AVSTREAM_PARSE_FULL;
266 /* the parameters will be extracted from the compressed bitstream */
271 static int dts_read_header(AVFormatContext *s,
272 AVFormatParameters *ap)
276 st = av_new_stream(s, 0);
278 return AVERROR(ENOMEM);
280 st->codec->codec_type = CODEC_TYPE_AUDIO;
281 st->codec->codec_id = CODEC_ID_DTS;
282 st->need_parsing = AVSTREAM_PARSE_FULL;
283 /* the parameters will be extracted from the compressed bitstream */
288 static int aac_read_header(AVFormatContext *s,
289 AVFormatParameters *ap)
293 st = av_new_stream(s, 0);
295 return AVERROR(ENOMEM);
297 st->codec->codec_type = CODEC_TYPE_AUDIO;
298 st->codec->codec_id = CODEC_ID_AAC;
299 st->need_parsing = AVSTREAM_PARSE_FULL;
300 /* the parameters will be extracted from the compressed bitstream */
304 /* mpeg1/h263 input */
305 static int video_read_header(AVFormatContext *s,
306 AVFormatParameters *ap)
310 st = av_new_stream(s, 0);
312 return AVERROR(ENOMEM);
314 st->codec->codec_type = CODEC_TYPE_VIDEO;
315 st->codec->codec_id = s->iformat->value;
316 st->need_parsing = AVSTREAM_PARSE_FULL;
318 /* for mjpeg, specify frame rate */
319 /* for mpeg4 specify it too (most mpeg4 streams do not have the fixed_vop_rate set ...)*/
320 if (ap->time_base.num) {
321 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
322 } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
323 st->codec->codec_id == CODEC_ID_MPEG4 ||
324 st->codec->codec_id == CODEC_ID_H264) {
325 av_set_pts_info(st, 64, 1, 25);
331 #define SEQ_START_CODE 0x000001b3
332 #define GOP_START_CODE 0x000001b8
333 #define PICTURE_START_CODE 0x00000100
334 #define SLICE_START_CODE 0x00000101
335 #define PACK_START_CODE 0x000001ba
336 #define VIDEO_ID 0x000001e0
337 #define AUDIO_ID 0x000001c0
339 static int mpegvideo_probe(AVProbeData *p)
342 int pic=0, seq=0, slice=0, pspack=0, pes=0;
345 for(i=0; i<p->buf_size; i++){
346 code = (code<<8) + p->buf[i];
347 if ((code & 0xffffff00) == 0x100) {
349 case SEQ_START_CODE: seq++; break;
350 case PICTURE_START_CODE: pic++; break;
351 case SLICE_START_CODE: slice++; break;
352 case PACK_START_CODE: pspack++; break;
354 if ((code & 0x1f0) == VIDEO_ID) pes++;
355 else if((code & 0x1e0) == AUDIO_ID) pes++;
358 if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
359 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
363 #define VISUAL_OBJECT_START_CODE 0x000001b5
364 #define VOP_START_CODE 0x000001b6
366 static int mpeg4video_probe(AVProbeData *probe_packet)
368 uint32_t temp_buffer= -1;
369 int VO=0, VOL=0, VOP = 0, VISO = 0, res=0;
372 for(i=0; i<probe_packet->buf_size; i++){
373 temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
374 if ((temp_buffer & 0xffffff00) != 0x100)
377 if (temp_buffer == VOP_START_CODE) VOP++;
378 else if (temp_buffer == VISUAL_OBJECT_START_CODE) VISO++;
379 else if (temp_buffer < 0x120) VO++;
380 else if (temp_buffer < 0x130) VOL++;
381 else if ( !(0x1AF < temp_buffer && temp_buffer < 0x1B7)
382 && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++;
385 if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0)
386 return AVPROBE_SCORE_MAX/2;
390 static int h263_probe(AVProbeData *p)
396 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
403 static int h261_probe(AVProbeData *p)
409 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
416 static int ac3_probe(AVProbeData *p)
418 int max_frames, first_frames = 0, frames;
419 uint8_t *buf, *buf2, *end;
424 end = buf + p->buf_size;
426 for(; buf < end; buf++) {
429 for(frames = 0; buf2 < end; frames++) {
430 if(ff_ac3_parse_header(buf2, &hdr) < 0)
432 buf2 += hdr.frame_size;
434 max_frames = FFMAX(max_frames, frames);
436 first_frames = frames;
438 if (first_frames>=3) return AVPROBE_SCORE_MAX * 3 / 4;
439 else if(max_frames>=3) return AVPROBE_SCORE_MAX / 2;
440 else if(max_frames>=1) return 1;
444 static int flac_probe(AVProbeData *p)
446 if(memcmp(p->buf, "fLaC", 4)) return 0;
447 else return AVPROBE_SCORE_MAX / 2;
450 AVInputFormat shorten_demuxer = {
456 raw_read_partial_packet,
458 .flags= AVFMT_GENERIC_INDEX,
462 AVInputFormat flac_demuxer = {
468 raw_read_partial_packet,
470 .flags= AVFMT_GENERIC_INDEX,
471 .extensions = "flac",
475 AVOutputFormat flac_muxer = {
485 .flags= AVFMT_NOTIMESTAMPS,
487 #endif //CONFIG_MUXERS
489 #ifdef CONFIG_AC3_DEMUXER
490 AVInputFormat ac3_demuxer = {
496 raw_read_partial_packet,
498 .flags= AVFMT_GENERIC_INDEX,
504 AVOutputFormat ac3_muxer = {
514 .flags= AVFMT_NOTIMESTAMPS,
516 #endif //CONFIG_MUXERS
518 AVInputFormat dts_demuxer = {
524 raw_read_partial_packet,
526 .flags= AVFMT_GENERIC_INDEX,
530 AVInputFormat aac_demuxer = {
536 raw_read_partial_packet,
538 .flags= AVFMT_GENERIC_INDEX,
542 #ifdef CONFIG_ROQ_MUXER
543 AVOutputFormat roq_muxer =
555 #endif //CONFIG_ROQ_MUXER
557 AVInputFormat h261_demuxer = {
563 raw_read_partial_packet,
565 .flags= AVFMT_GENERIC_INDEX,
566 .extensions = "h261",
567 .value = CODEC_ID_H261,
571 AVOutputFormat h261_muxer = {
581 .flags= AVFMT_NOTIMESTAMPS,
583 #endif //CONFIG_MUXERS
585 AVInputFormat h263_demuxer = {
591 raw_read_partial_packet,
593 .flags= AVFMT_GENERIC_INDEX,
594 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
595 .value = CODEC_ID_H263,
599 AVOutputFormat h263_muxer = {
609 .flags= AVFMT_NOTIMESTAMPS,
611 #endif //CONFIG_MUXERS
613 AVInputFormat m4v_demuxer = {
615 "raw MPEG4 video format",
617 mpeg4video_probe, /** probing for mpeg4 data */
619 raw_read_partial_packet,
621 .flags= AVFMT_GENERIC_INDEX,
622 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
623 .value = CODEC_ID_MPEG4,
627 AVOutputFormat m4v_muxer = {
629 "raw MPEG4 video format",
637 .flags= AVFMT_NOTIMESTAMPS,
639 #endif //CONFIG_MUXERS
641 AVInputFormat h264_demuxer = {
643 "raw H264 video format",
645 NULL /*mpegvideo_probe*/,
647 raw_read_partial_packet,
649 .flags= AVFMT_GENERIC_INDEX,
650 .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
651 .value = CODEC_ID_H264,
655 AVOutputFormat h264_muxer = {
657 "raw H264 video format",
665 .flags= AVFMT_NOTIMESTAMPS,
667 #endif //CONFIG_MUXERS
669 AVInputFormat mpegvideo_demuxer = {
675 raw_read_partial_packet,
677 .flags= AVFMT_GENERIC_INDEX,
678 .value = CODEC_ID_MPEG1VIDEO,
682 AVOutputFormat mpeg1video_muxer = {
692 .flags= AVFMT_NOTIMESTAMPS,
694 #endif //CONFIG_MUXERS
697 AVOutputFormat mpeg2video_muxer = {
707 .flags= AVFMT_NOTIMESTAMPS,
709 #endif //CONFIG_MUXERS
711 AVInputFormat mjpeg_demuxer = {
717 raw_read_partial_packet,
719 .flags= AVFMT_GENERIC_INDEX,
720 .extensions = "mjpg,mjpeg",
721 .value = CODEC_ID_MJPEG,
724 AVInputFormat ingenient_demuxer = {
730 ingenient_read_packet,
732 .flags= AVFMT_GENERIC_INDEX,
733 .extensions = "cgi", // FIXME
734 .value = CODEC_ID_MJPEG,
738 AVOutputFormat mjpeg_muxer = {
748 .flags= AVFMT_NOTIMESTAMPS,
750 #endif //CONFIG_MUXERS
752 AVInputFormat vc1_demuxer = {
756 NULL /* vc1_probe */,
758 raw_read_partial_packet,
761 .value = CODEC_ID_VC1,
766 #define PCMINPUTDEF(name, long_name, ext, codec) \
767 AVInputFormat pcm_ ## name ## _demuxer = {\
776 .flags= AVFMT_GENERIC_INDEX,\
781 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
782 AVOutputFormat pcm_ ## name ## _muxer = {\
792 .flags= AVFMT_NOTIMESTAMPS,\
796 #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
797 #define PCMDEF(name, long_name, ext, codec) \
798 PCMINPUTDEF(name, long_name, ext, codec)
799 #elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
800 #define PCMDEF(name, long_name, ext, codec) \
801 PCMOUTPUTDEF(name, long_name, ext, codec)
802 #elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
803 #define PCMDEF(name, long_name, ext, codec) \
804 PCMINPUTDEF(name, long_name, ext, codec)\
805 PCMOUTPUTDEF(name, long_name, ext, codec)
807 #define PCMDEF(name, long_name, ext, codec)
810 #ifdef WORDS_BIGENDIAN
812 #define LE_DEF(s) NULL
814 #define BE_DEF(s) NULL
819 PCMDEF(s16le, "pcm signed 16 bit little endian format",
820 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
822 PCMDEF(s16be, "pcm signed 16 bit big endian format",
823 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
825 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
826 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
828 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
829 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
831 PCMDEF(s8, "pcm signed 8 bit format",
832 "sb", CODEC_ID_PCM_S8)
834 PCMDEF(u8, "pcm unsigned 8 bit format",
835 "ub", CODEC_ID_PCM_U8)
837 PCMDEF(mulaw, "pcm mu law format",
838 "ul", CODEC_ID_PCM_MULAW)
840 PCMDEF(alaw, "pcm A law format",
841 "al", CODEC_ID_PCM_ALAW)
843 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
845 int packet_size, ret, width, height;
846 AVStream *st = s->streams[0];
848 width = st->codec->width;
849 height = st->codec->height;
851 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
855 ret= av_get_packet(s->pb, pkt, packet_size);
857 pkt->dts= pkt->pos / packet_size;
859 pkt->stream_index = 0;
860 if (ret != packet_size) {
867 AVInputFormat rawvideo_demuxer = {
873 rawvideo_read_packet,
875 .flags= AVFMT_GENERIC_INDEX,
876 .extensions = "yuv,cif,qcif,rgb",
877 .value = CODEC_ID_RAWVIDEO,
881 AVOutputFormat rawvideo_muxer = {
891 .flags= AVFMT_NOTIMESTAMPS,
893 #endif //CONFIG_MUXERS
896 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
901 AVOutputFormat null_muxer = {
907 #ifdef WORDS_BIGENDIAN
915 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
917 #endif //CONFIG_MUXERS