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"
27 static int flac_write_header(struct AVFormatContext *s)
29 static const uint8_t header[8] = {
30 0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22
32 uint8_t *streaminfo = s->streams[0]->codec->extradata;
33 int len = s->streams[0]->codec->extradata_size;
34 if(streaminfo != NULL && len > 0) {
35 put_buffer(&s->pb, header, 8);
36 put_buffer(&s->pb, streaminfo, len);
42 static int roq_write_header(struct AVFormatContext *s)
44 static const uint8_t header[] = {
45 0x84, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, 0x1E, 0x00
48 put_buffer(&s->pb, header, 8);
49 put_flush_packet(&s->pb);
54 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
56 put_buffer(&s->pb, pkt->data, pkt->size);
57 put_flush_packet(&s->pb);
60 #endif //CONFIG_MUXERS
63 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
68 st = av_new_stream(s, 0);
70 return AVERROR(ENOMEM);
72 id = s->iformat->value;
73 if (id == CODEC_ID_RAWVIDEO) {
74 st->codec->codec_type = CODEC_TYPE_VIDEO;
76 st->codec->codec_type = CODEC_TYPE_AUDIO;
78 st->codec->codec_id = id;
80 switch(st->codec->codec_type) {
81 case CODEC_TYPE_AUDIO:
82 st->codec->sample_rate = ap->sample_rate;
83 st->codec->channels = ap->channels;
84 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
86 case CODEC_TYPE_VIDEO:
87 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
88 st->codec->width = ap->width;
89 st->codec->height = ap->height;
90 st->codec->pix_fmt = ap->pix_fmt;
91 if(st->codec->pix_fmt == PIX_FMT_NONE)
92 st->codec->pix_fmt= PIX_FMT_YUV420P;
100 #define RAW_PACKET_SIZE 1024
102 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
105 // AVStream *st = s->streams[0];
107 size= RAW_PACKET_SIZE;
109 ret= av_get_packet(&s->pb, pkt, size);
111 pkt->stream_index = 0;
115 /* note: we need to modify the packet size here to handle the last
121 static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
125 size = RAW_PACKET_SIZE;
127 if (av_new_packet(pkt, size) < 0)
130 pkt->pos= url_ftell(&s->pb);
131 pkt->stream_index = 0;
132 ret = get_partial_buffer(&s->pb, pkt->data, size);
141 // http://www.artificis.hu/files/texts/ingenient.txt
142 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
144 int ret, size, w, h, unk1, unk2;
146 if (get_le32(&s->pb) != MKTAG('M', 'J', 'P', 'G'))
147 return AVERROR(EIO); // FIXME
149 size = get_le32(&s->pb);
151 w = get_le16(&s->pb);
152 h = get_le16(&s->pb);
154 url_fskip(&s->pb, 8); // zero + size (padded?)
155 url_fskip(&s->pb, 2);
156 unk1 = get_le16(&s->pb);
157 unk2 = get_le16(&s->pb);
158 url_fskip(&s->pb, 22); // ascii timestamp
160 av_log(NULL, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
161 size, w, h, unk1, unk2);
163 if (av_new_packet(pkt, size) < 0)
166 pkt->pos = url_ftell(&s->pb);
167 pkt->stream_index = 0;
168 ret = get_buffer(&s->pb, pkt->data, size);
177 static int raw_read_close(AVFormatContext *s)
182 int pcm_read_seek(AVFormatContext *s,
183 int stream_index, int64_t timestamp, int flags)
186 int block_align, byte_rate;
191 block_align = st->codec->block_align ? st->codec->block_align :
192 (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
193 byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 :
194 block_align * st->codec->sample_rate;
196 if (block_align <= 0 || byte_rate <= 0)
199 /* compute the position by aligning it to block_align */
200 pos = av_rescale_rnd(timestamp * byte_rate,
202 st->time_base.den * (int64_t)block_align,
203 (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
206 /* recompute exact position */
207 st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
208 url_fseek(&s->pb, pos + s->data_offset, SEEK_SET);
213 static int ac3_read_header(AVFormatContext *s,
214 AVFormatParameters *ap)
218 st = av_new_stream(s, 0);
220 return AVERROR(ENOMEM);
222 st->codec->codec_type = CODEC_TYPE_AUDIO;
223 st->codec->codec_id = CODEC_ID_AC3;
224 st->need_parsing = AVSTREAM_PARSE_FULL;
225 /* the parameters will be extracted from the compressed bitstream */
229 static int shorten_read_header(AVFormatContext *s,
230 AVFormatParameters *ap)
234 st = av_new_stream(s, 0);
236 return AVERROR(ENOMEM);
237 st->codec->codec_type = CODEC_TYPE_AUDIO;
238 st->codec->codec_id = CODEC_ID_SHORTEN;
239 st->need_parsing = AVSTREAM_PARSE_FULL;
240 /* the parameters will be extracted from the compressed bitstream */
245 static int flac_read_header(AVFormatContext *s,
246 AVFormatParameters *ap)
250 st = av_new_stream(s, 0);
252 return AVERROR(ENOMEM);
253 st->codec->codec_type = CODEC_TYPE_AUDIO;
254 st->codec->codec_id = CODEC_ID_FLAC;
255 st->need_parsing = AVSTREAM_PARSE_FULL;
256 /* the parameters will be extracted from the compressed bitstream */
261 static int dts_read_header(AVFormatContext *s,
262 AVFormatParameters *ap)
266 st = av_new_stream(s, 0);
268 return AVERROR(ENOMEM);
270 st->codec->codec_type = CODEC_TYPE_AUDIO;
271 st->codec->codec_id = CODEC_ID_DTS;
272 st->need_parsing = AVSTREAM_PARSE_FULL;
273 /* the parameters will be extracted from the compressed bitstream */
278 static int aac_read_header(AVFormatContext *s,
279 AVFormatParameters *ap)
283 st = av_new_stream(s, 0);
285 return AVERROR(ENOMEM);
287 st->codec->codec_type = CODEC_TYPE_AUDIO;
288 st->codec->codec_id = CODEC_ID_AAC;
289 st->need_parsing = AVSTREAM_PARSE_FULL;
290 /* the parameters will be extracted from the compressed bitstream */
294 /* mpeg1/h263 input */
295 static int video_read_header(AVFormatContext *s,
296 AVFormatParameters *ap)
300 st = av_new_stream(s, 0);
302 return AVERROR(ENOMEM);
304 st->codec->codec_type = CODEC_TYPE_VIDEO;
305 st->codec->codec_id = s->iformat->value;
306 st->need_parsing = AVSTREAM_PARSE_FULL;
308 /* for mjpeg, specify frame rate */
309 /* for mpeg4 specify it too (most mpeg4 streams do not have the fixed_vop_rate set ...)*/
310 if (ap->time_base.num) {
311 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
312 } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
313 st->codec->codec_id == CODEC_ID_MPEG4 ||
314 st->codec->codec_id == CODEC_ID_H264) {
315 av_set_pts_info(st, 64, 1, 25);
321 #define SEQ_START_CODE 0x000001b3
322 #define GOP_START_CODE 0x000001b8
323 #define PICTURE_START_CODE 0x00000100
324 #define SLICE_START_CODE 0x00000101
325 #define PACK_START_CODE 0x000001ba
326 #define VIDEO_ID 0x000001e0
327 #define AUDIO_ID 0x000001c0
329 static int mpegvideo_probe(AVProbeData *p)
332 int pic=0, seq=0, slice=0, pspack=0, pes=0;
335 for(i=0; i<p->buf_size; i++){
336 code = (code<<8) + p->buf[i];
337 if ((code & 0xffffff00) == 0x100) {
339 case SEQ_START_CODE: seq++; break;
340 case PICTURE_START_CODE: pic++; break;
341 case SLICE_START_CODE: slice++; break;
342 case PACK_START_CODE: pspack++; break;
344 if ((code & 0x1f0) == VIDEO_ID) pes++;
345 else if((code & 0x1e0) == AUDIO_ID) pes++;
348 if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
349 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
353 #define VISUAL_OBJECT_START_CODE 0x000001b5
354 #define VOP_START_CODE 0x000001b6
356 static int mpeg4video_probe(AVProbeData *probe_packet)
358 uint32_t temp_buffer= -1;
359 int VO=0, VOL=0, VOP = 0, VISO = 0, res=0;
362 for(i=0; i<probe_packet->buf_size; i++){
363 temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
364 if ((temp_buffer & 0xffffff00) != 0x100)
367 if (temp_buffer == VOP_START_CODE) VOP++;
368 else if (temp_buffer == VISUAL_OBJECT_START_CODE) VISO++;
369 else if (temp_buffer < 0x120) VO++;
370 else if (temp_buffer < 0x130) VOL++;
371 else if ( !(0x1AF < temp_buffer && temp_buffer < 0x1B7)
372 && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++;
375 if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0)
376 return AVPROBE_SCORE_MAX/2;
380 static int h263_probe(AVProbeData *p)
386 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
393 static int h261_probe(AVProbeData *p)
399 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
406 static int ac3_probe(AVProbeData *p)
408 int max_frames, first_frames = 0, frames;
409 uint8_t *buf, *buf2, *end;
414 end = buf + p->buf_size;
416 for(; buf < end; buf++) {
419 for(frames = 0; buf2 < end; frames++) {
420 if(ff_ac3_parse_header(buf2, &hdr) < 0)
422 buf2 += hdr.frame_size;
424 max_frames = FFMAX(max_frames, frames);
426 first_frames = frames;
428 if (first_frames>=3) return AVPROBE_SCORE_MAX * 3 / 4;
429 else if(max_frames>=3) return AVPROBE_SCORE_MAX / 2;
430 else if(max_frames>=1) return 1;
434 static int flac_probe(AVProbeData *p)
436 if(memcmp(p->buf, "fLaC", 4)) return 0;
437 else return AVPROBE_SCORE_MAX / 2;
440 AVInputFormat shorten_demuxer = {
446 raw_read_partial_packet,
448 .flags= AVFMT_GENERIC_INDEX,
452 AVInputFormat flac_demuxer = {
458 raw_read_partial_packet,
460 .flags= AVFMT_GENERIC_INDEX,
461 .extensions = "flac",
465 AVOutputFormat flac_muxer = {
475 .flags= AVFMT_NOTIMESTAMPS,
477 #endif //CONFIG_MUXERS
479 #ifdef CONFIG_AC3_DEMUXER
480 AVInputFormat ac3_demuxer = {
486 raw_read_partial_packet,
488 .flags= AVFMT_GENERIC_INDEX,
494 AVOutputFormat ac3_muxer = {
504 .flags= AVFMT_NOTIMESTAMPS,
506 #endif //CONFIG_MUXERS
508 AVInputFormat dts_demuxer = {
514 raw_read_partial_packet,
516 .flags= AVFMT_GENERIC_INDEX,
520 AVInputFormat aac_demuxer = {
526 raw_read_partial_packet,
528 .flags= AVFMT_GENERIC_INDEX,
532 #ifdef CONFIG_ROQ_MUXER
533 AVOutputFormat roq_muxer =
545 #endif //CONFIG_ROQ_MUXER
547 AVInputFormat h261_demuxer = {
553 raw_read_partial_packet,
555 .flags= AVFMT_GENERIC_INDEX,
556 .extensions = "h261",
557 .value = CODEC_ID_H261,
561 AVOutputFormat h261_muxer = {
571 .flags= AVFMT_NOTIMESTAMPS,
573 #endif //CONFIG_MUXERS
575 AVInputFormat h263_demuxer = {
581 raw_read_partial_packet,
583 .flags= AVFMT_GENERIC_INDEX,
584 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
585 .value = CODEC_ID_H263,
589 AVOutputFormat h263_muxer = {
599 .flags= AVFMT_NOTIMESTAMPS,
601 #endif //CONFIG_MUXERS
603 AVInputFormat m4v_demuxer = {
605 "raw MPEG4 video format",
607 mpeg4video_probe, /** probing for mpeg4 data */
609 raw_read_partial_packet,
611 .flags= AVFMT_GENERIC_INDEX,
612 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
613 .value = CODEC_ID_MPEG4,
617 AVOutputFormat m4v_muxer = {
619 "raw MPEG4 video format",
627 .flags= AVFMT_NOTIMESTAMPS,
629 #endif //CONFIG_MUXERS
631 AVInputFormat h264_demuxer = {
633 "raw H264 video format",
635 NULL /*mpegvideo_probe*/,
637 raw_read_partial_packet,
639 .flags= AVFMT_GENERIC_INDEX,
640 .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
641 .value = CODEC_ID_H264,
645 AVOutputFormat h264_muxer = {
647 "raw H264 video format",
655 .flags= AVFMT_NOTIMESTAMPS,
657 #endif //CONFIG_MUXERS
659 AVInputFormat mpegvideo_demuxer = {
665 raw_read_partial_packet,
667 .flags= AVFMT_GENERIC_INDEX,
668 .value = CODEC_ID_MPEG1VIDEO,
672 AVOutputFormat mpeg1video_muxer = {
682 .flags= AVFMT_NOTIMESTAMPS,
684 #endif //CONFIG_MUXERS
687 AVOutputFormat mpeg2video_muxer = {
697 .flags= AVFMT_NOTIMESTAMPS,
699 #endif //CONFIG_MUXERS
701 AVInputFormat mjpeg_demuxer = {
707 raw_read_partial_packet,
709 .flags= AVFMT_GENERIC_INDEX,
710 .extensions = "mjpg,mjpeg",
711 .value = CODEC_ID_MJPEG,
714 AVInputFormat ingenient_demuxer = {
720 ingenient_read_packet,
722 .flags= AVFMT_GENERIC_INDEX,
723 .extensions = "cgi", // FIXME
724 .value = CODEC_ID_MJPEG,
728 AVOutputFormat mjpeg_muxer = {
738 .flags= AVFMT_NOTIMESTAMPS,
740 #endif //CONFIG_MUXERS
742 AVInputFormat vc1_demuxer = {
746 NULL /* vc1_probe */,
748 raw_read_partial_packet,
751 .value = CODEC_ID_VC1,
756 #define PCMINPUTDEF(name, long_name, ext, codec) \
757 AVInputFormat pcm_ ## name ## _demuxer = {\
766 .flags= AVFMT_GENERIC_INDEX,\
771 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
772 AVOutputFormat pcm_ ## name ## _muxer = {\
782 .flags= AVFMT_NOTIMESTAMPS,\
786 #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
787 #define PCMDEF(name, long_name, ext, codec) \
788 PCMINPUTDEF(name, long_name, ext, codec)
789 #elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
790 #define PCMDEF(name, long_name, ext, codec) \
791 PCMOUTPUTDEF(name, long_name, ext, codec)
792 #elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
793 #define PCMDEF(name, long_name, ext, codec) \
794 PCMINPUTDEF(name, long_name, ext, codec)\
795 PCMOUTPUTDEF(name, long_name, ext, codec)
797 #define PCMDEF(name, long_name, ext, codec)
800 #ifdef WORDS_BIGENDIAN
802 #define LE_DEF(s) NULL
804 #define BE_DEF(s) NULL
809 PCMDEF(s16le, "pcm signed 16 bit little endian format",
810 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
812 PCMDEF(s16be, "pcm signed 16 bit big endian format",
813 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
815 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
816 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
818 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
819 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
821 PCMDEF(s8, "pcm signed 8 bit format",
822 "sb", CODEC_ID_PCM_S8)
824 PCMDEF(u8, "pcm unsigned 8 bit format",
825 "ub", CODEC_ID_PCM_U8)
827 PCMDEF(mulaw, "pcm mu law format",
828 "ul", CODEC_ID_PCM_MULAW)
830 PCMDEF(alaw, "pcm A law format",
831 "al", CODEC_ID_PCM_ALAW)
833 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
835 int packet_size, ret, width, height;
836 AVStream *st = s->streams[0];
838 width = st->codec->width;
839 height = st->codec->height;
841 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
845 ret= av_get_packet(&s->pb, pkt, packet_size);
847 pkt->stream_index = 0;
848 if (ret != packet_size) {
855 AVInputFormat rawvideo_demuxer = {
861 rawvideo_read_packet,
863 .flags= AVFMT_GENERIC_INDEX,
864 .extensions = "yuv,cif,qcif,rgb",
865 .value = CODEC_ID_RAWVIDEO,
869 AVOutputFormat rawvideo_muxer = {
879 .flags= AVFMT_NOTIMESTAMPS,
881 #endif //CONFIG_MUXERS
884 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
889 AVOutputFormat null_muxer = {
895 #ifdef WORDS_BIGENDIAN
903 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
905 #endif //CONFIG_MUXERS