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"
29 static int flac_write_header(struct AVFormatContext *s)
31 static const uint8_t header[8] = {
32 0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22
34 uint8_t *streaminfo = s->streams[0]->codec->extradata;
35 int len = s->streams[0]->codec->extradata_size;
36 if(streaminfo != NULL && len > 0) {
37 put_buffer(s->pb, header, 8);
38 put_buffer(s->pb, streaminfo, len);
44 static int roq_write_header(struct AVFormatContext *s)
46 static const uint8_t header[] = {
47 0x84, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, 0x1E, 0x00
50 put_buffer(s->pb, header, 8);
51 put_flush_packet(s->pb);
56 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
58 put_buffer(s->pb, pkt->data, pkt->size);
59 put_flush_packet(s->pb);
62 #endif //CONFIG_MUXERS
65 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
70 st = av_new_stream(s, 0);
72 return AVERROR(ENOMEM);
74 id = s->iformat->value;
75 if (id == CODEC_ID_RAWVIDEO) {
76 st->codec->codec_type = CODEC_TYPE_VIDEO;
78 st->codec->codec_type = CODEC_TYPE_AUDIO;
80 st->codec->codec_id = id;
82 switch(st->codec->codec_type) {
83 case CODEC_TYPE_AUDIO:
84 st->codec->sample_rate = ap->sample_rate;
85 st->codec->channels = ap->channels;
86 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
88 case CODEC_TYPE_VIDEO:
90 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
92 av_set_pts_info(st, 64, 1, 25);
93 st->codec->width = ap->width;
94 st->codec->height = ap->height;
95 st->codec->pix_fmt = ap->pix_fmt;
96 if(st->codec->pix_fmt == PIX_FMT_NONE)
97 st->codec->pix_fmt= PIX_FMT_YUV420P;
105 #define RAW_PACKET_SIZE 1024
107 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
110 // AVStream *st = s->streams[0];
112 size= RAW_PACKET_SIZE;
114 ret= av_get_packet(s->pb, pkt, size);
116 pkt->stream_index = 0;
120 /* note: we need to modify the packet size here to handle the last
124 bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
125 assert(bps); // if false there IS a bug elsewhere (NOT in this function)
127 pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);
132 static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
136 size = RAW_PACKET_SIZE;
138 if (av_new_packet(pkt, size) < 0)
141 pkt->pos= url_ftell(s->pb);
142 pkt->stream_index = 0;
143 ret = get_partial_buffer(s->pb, pkt->data, size);
152 // http://www.artificis.hu/files/texts/ingenient.txt
153 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
155 int ret, size, w, h, unk1, unk2;
157 if (get_le32(s->pb) != MKTAG('M', 'J', 'P', 'G'))
158 return AVERROR(EIO); // FIXME
160 size = get_le32(s->pb);
165 url_fskip(s->pb, 8); // zero + size (padded?)
167 unk1 = get_le16(s->pb);
168 unk2 = get_le16(s->pb);
169 url_fskip(s->pb, 22); // ascii timestamp
171 av_log(NULL, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
172 size, w, h, unk1, unk2);
174 if (av_new_packet(pkt, size) < 0)
177 pkt->pos = url_ftell(s->pb);
178 pkt->stream_index = 0;
179 ret = get_buffer(s->pb, pkt->data, size);
188 static int raw_read_close(AVFormatContext *s)
193 int pcm_read_seek(AVFormatContext *s,
194 int stream_index, int64_t timestamp, int flags)
197 int block_align, byte_rate;
202 block_align = st->codec->block_align ? st->codec->block_align :
203 (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
204 byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 :
205 block_align * st->codec->sample_rate;
207 if (block_align <= 0 || byte_rate <= 0)
210 /* compute the position by aligning it to block_align */
211 pos = av_rescale_rnd(timestamp * byte_rate,
213 st->time_base.den * (int64_t)block_align,
214 (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
217 /* recompute exact position */
218 st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
219 url_fseek(s->pb, pos + s->data_offset, SEEK_SET);
224 static int ac3_read_header(AVFormatContext *s,
225 AVFormatParameters *ap)
229 st = av_new_stream(s, 0);
231 return AVERROR(ENOMEM);
233 st->codec->codec_type = CODEC_TYPE_AUDIO;
234 st->codec->codec_id = CODEC_ID_AC3;
235 st->need_parsing = AVSTREAM_PARSE_FULL;
236 /* the parameters will be extracted from the compressed bitstream */
240 static int shorten_read_header(AVFormatContext *s,
241 AVFormatParameters *ap)
245 st = av_new_stream(s, 0);
247 return AVERROR(ENOMEM);
248 st->codec->codec_type = CODEC_TYPE_AUDIO;
249 st->codec->codec_id = CODEC_ID_SHORTEN;
250 st->need_parsing = AVSTREAM_PARSE_FULL;
251 /* the parameters will be extracted from the compressed bitstream */
256 static int flac_read_header(AVFormatContext *s,
257 AVFormatParameters *ap)
261 st = av_new_stream(s, 0);
263 return AVERROR(ENOMEM);
264 st->codec->codec_type = CODEC_TYPE_AUDIO;
265 st->codec->codec_id = CODEC_ID_FLAC;
266 st->need_parsing = AVSTREAM_PARSE_FULL;
267 /* the parameters will be extracted from the compressed bitstream */
272 static int dts_read_header(AVFormatContext *s,
273 AVFormatParameters *ap)
277 st = av_new_stream(s, 0);
279 return AVERROR(ENOMEM);
281 st->codec->codec_type = CODEC_TYPE_AUDIO;
282 st->codec->codec_id = CODEC_ID_DTS;
283 st->need_parsing = AVSTREAM_PARSE_FULL;
284 /* the parameters will be extracted from the compressed bitstream */
289 static int aac_read_header(AVFormatContext *s,
290 AVFormatParameters *ap)
294 st = av_new_stream(s, 0);
296 return AVERROR(ENOMEM);
298 st->codec->codec_type = CODEC_TYPE_AUDIO;
299 st->codec->codec_id = CODEC_ID_AAC;
300 st->need_parsing = AVSTREAM_PARSE_FULL;
301 /* the parameters will be extracted from the compressed bitstream */
305 /* mpeg1/h263 input */
306 static int video_read_header(AVFormatContext *s,
307 AVFormatParameters *ap)
311 st = av_new_stream(s, 0);
313 return AVERROR(ENOMEM);
315 st->codec->codec_type = CODEC_TYPE_VIDEO;
316 st->codec->codec_id = s->iformat->value;
317 st->need_parsing = AVSTREAM_PARSE_FULL;
319 /* for mjpeg, specify frame rate */
320 /* for mpeg4 specify it too (most mpeg4 streams do not have the fixed_vop_rate set ...)*/
321 if (ap->time_base.num) {
322 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
323 } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
324 st->codec->codec_id == CODEC_ID_MPEG4 ||
325 st->codec->codec_id == CODEC_ID_H264) {
326 av_set_pts_info(st, 64, 1, 25);
332 #define SEQ_START_CODE 0x000001b3
333 #define GOP_START_CODE 0x000001b8
334 #define PICTURE_START_CODE 0x00000100
335 #define SLICE_START_CODE 0x00000101
336 #define PACK_START_CODE 0x000001ba
337 #define VIDEO_ID 0x000001e0
338 #define AUDIO_ID 0x000001c0
340 static int mpegvideo_probe(AVProbeData *p)
343 int pic=0, seq=0, slice=0, pspack=0, pes=0;
346 for(i=0; i<p->buf_size; i++){
347 code = (code<<8) + p->buf[i];
348 if ((code & 0xffffff00) == 0x100) {
350 case SEQ_START_CODE: seq++; break;
351 case PICTURE_START_CODE: pic++; break;
352 case SLICE_START_CODE: slice++; break;
353 case PACK_START_CODE: pspack++; break;
355 if ((code & 0x1f0) == VIDEO_ID) pes++;
356 else if((code & 0x1e0) == AUDIO_ID) pes++;
359 if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
360 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
364 #define VISUAL_OBJECT_START_CODE 0x000001b5
365 #define VOP_START_CODE 0x000001b6
367 static int mpeg4video_probe(AVProbeData *probe_packet)
369 uint32_t temp_buffer= -1;
370 int VO=0, VOL=0, VOP = 0, VISO = 0, res=0;
373 for(i=0; i<probe_packet->buf_size; i++){
374 temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
375 if ((temp_buffer & 0xffffff00) != 0x100)
378 if (temp_buffer == VOP_START_CODE) VOP++;
379 else if (temp_buffer == VISUAL_OBJECT_START_CODE) VISO++;
380 else if (temp_buffer < 0x120) VO++;
381 else if (temp_buffer < 0x130) VOL++;
382 else if ( !(0x1AF < temp_buffer && temp_buffer < 0x1B7)
383 && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++;
386 if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0)
387 return AVPROBE_SCORE_MAX/2;
391 static int h263_probe(AVProbeData *p)
397 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
404 static int h261_probe(AVProbeData *p)
410 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
417 static int ac3_probe(AVProbeData *p)
419 int max_frames, first_frames = 0, frames;
420 uint8_t *buf, *buf2, *end;
425 end = buf + p->buf_size;
427 for(; buf < end; buf++) {
430 for(frames = 0; buf2 < end; frames++) {
431 if(ff_ac3_parse_header(buf2, &hdr) < 0)
433 if(buf2 + hdr.frame_size > end ||
434 av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, buf2 + 2, hdr.frame_size - 2))
436 buf2 += hdr.frame_size;
438 max_frames = FFMAX(max_frames, frames);
440 first_frames = frames;
442 if (first_frames>=3) return AVPROBE_SCORE_MAX * 3 / 4;
443 else if(max_frames>=3) return AVPROBE_SCORE_MAX / 2;
444 else if(max_frames>=1) return 1;
448 static int flac_probe(AVProbeData *p)
450 if(memcmp(p->buf, "fLaC", 4)) return 0;
451 else return AVPROBE_SCORE_MAX / 2;
454 AVInputFormat shorten_demuxer = {
460 raw_read_partial_packet,
462 .flags= AVFMT_GENERIC_INDEX,
466 AVInputFormat flac_demuxer = {
472 raw_read_partial_packet,
474 .flags= AVFMT_GENERIC_INDEX,
475 .extensions = "flac",
479 AVOutputFormat flac_muxer = {
489 .flags= AVFMT_NOTIMESTAMPS,
491 #endif //CONFIG_MUXERS
493 #ifdef CONFIG_AC3_DEMUXER
494 AVInputFormat ac3_demuxer = {
500 raw_read_partial_packet,
502 .flags= AVFMT_GENERIC_INDEX,
508 AVOutputFormat ac3_muxer = {
518 .flags= AVFMT_NOTIMESTAMPS,
521 AVOutputFormat dts_muxer = {
531 .flags= AVFMT_NOTIMESTAMPS,
534 #endif //CONFIG_MUXERS
536 AVInputFormat dts_demuxer = {
542 raw_read_partial_packet,
544 .flags= AVFMT_GENERIC_INDEX,
548 AVInputFormat aac_demuxer = {
554 raw_read_partial_packet,
556 .flags= AVFMT_GENERIC_INDEX,
560 #ifdef CONFIG_ROQ_MUXER
561 AVOutputFormat roq_muxer =
573 #endif //CONFIG_ROQ_MUXER
575 AVInputFormat h261_demuxer = {
581 raw_read_partial_packet,
583 .flags= AVFMT_GENERIC_INDEX,
584 .extensions = "h261",
585 .value = CODEC_ID_H261,
589 AVOutputFormat h261_muxer = {
599 .flags= AVFMT_NOTIMESTAMPS,
601 #endif //CONFIG_MUXERS
603 AVInputFormat h263_demuxer = {
609 raw_read_partial_packet,
611 .flags= AVFMT_GENERIC_INDEX,
612 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
613 .value = CODEC_ID_H263,
617 AVOutputFormat h263_muxer = {
627 .flags= AVFMT_NOTIMESTAMPS,
629 #endif //CONFIG_MUXERS
631 AVInputFormat m4v_demuxer = {
633 "raw MPEG4 video format",
635 mpeg4video_probe, /** probing for mpeg4 data */
637 raw_read_partial_packet,
639 .flags= AVFMT_GENERIC_INDEX,
640 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
641 .value = CODEC_ID_MPEG4,
645 AVOutputFormat m4v_muxer = {
647 "raw MPEG4 video format",
655 .flags= AVFMT_NOTIMESTAMPS,
657 #endif //CONFIG_MUXERS
659 AVInputFormat h264_demuxer = {
661 "raw H264 video format",
663 NULL /*mpegvideo_probe*/,
665 raw_read_partial_packet,
667 .flags= AVFMT_GENERIC_INDEX,
668 .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
669 .value = CODEC_ID_H264,
673 AVOutputFormat h264_muxer = {
675 "raw H264 video format",
683 .flags= AVFMT_NOTIMESTAMPS,
685 #endif //CONFIG_MUXERS
687 AVInputFormat mpegvideo_demuxer = {
693 raw_read_partial_packet,
695 .flags= AVFMT_GENERIC_INDEX,
696 .value = CODEC_ID_MPEG1VIDEO,
700 AVOutputFormat mpeg1video_muxer = {
710 .flags= AVFMT_NOTIMESTAMPS,
712 #endif //CONFIG_MUXERS
715 AVOutputFormat mpeg2video_muxer = {
725 .flags= AVFMT_NOTIMESTAMPS,
727 #endif //CONFIG_MUXERS
729 AVInputFormat mjpeg_demuxer = {
735 raw_read_partial_packet,
737 .flags= AVFMT_GENERIC_INDEX,
738 .extensions = "mjpg,mjpeg",
739 .value = CODEC_ID_MJPEG,
742 AVInputFormat ingenient_demuxer = {
748 ingenient_read_packet,
750 .flags= AVFMT_GENERIC_INDEX,
751 .extensions = "cgi", // FIXME
752 .value = CODEC_ID_MJPEG,
756 AVOutputFormat mjpeg_muxer = {
766 .flags= AVFMT_NOTIMESTAMPS,
768 #endif //CONFIG_MUXERS
770 AVInputFormat vc1_demuxer = {
774 NULL /* vc1_probe */,
776 raw_read_partial_packet,
779 .value = CODEC_ID_VC1,
784 #define PCMINPUTDEF(name, long_name, ext, codec) \
785 AVInputFormat pcm_ ## name ## _demuxer = {\
794 .flags= AVFMT_GENERIC_INDEX,\
799 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
800 AVOutputFormat pcm_ ## name ## _muxer = {\
810 .flags= AVFMT_NOTIMESTAMPS,\
814 #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
815 #define PCMDEF(name, long_name, ext, codec) \
816 PCMINPUTDEF(name, long_name, ext, codec)
817 #elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
818 #define PCMDEF(name, long_name, ext, codec) \
819 PCMOUTPUTDEF(name, long_name, ext, codec)
820 #elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
821 #define PCMDEF(name, long_name, ext, codec) \
822 PCMINPUTDEF(name, long_name, ext, codec)\
823 PCMOUTPUTDEF(name, long_name, ext, codec)
825 #define PCMDEF(name, long_name, ext, codec)
828 #ifdef WORDS_BIGENDIAN
830 #define LE_DEF(s) NULL
832 #define BE_DEF(s) NULL
837 PCMDEF(s16le, "pcm signed 16 bit little endian format",
838 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
840 PCMDEF(s16be, "pcm signed 16 bit big endian format",
841 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
843 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
844 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
846 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
847 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
849 PCMDEF(s8, "pcm signed 8 bit format",
850 "sb", CODEC_ID_PCM_S8)
852 PCMDEF(u8, "pcm unsigned 8 bit format",
853 "ub", CODEC_ID_PCM_U8)
855 PCMDEF(mulaw, "pcm mu law format",
856 "ul", CODEC_ID_PCM_MULAW)
858 PCMDEF(alaw, "pcm A law format",
859 "al", CODEC_ID_PCM_ALAW)
861 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
863 int packet_size, ret, width, height;
864 AVStream *st = s->streams[0];
866 width = st->codec->width;
867 height = st->codec->height;
869 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
873 ret= av_get_packet(s->pb, pkt, packet_size);
875 pkt->dts= pkt->pos / packet_size;
877 pkt->stream_index = 0;
878 if (ret != packet_size) {
885 AVInputFormat rawvideo_demuxer = {
891 rawvideo_read_packet,
893 .flags= AVFMT_GENERIC_INDEX,
894 .extensions = "yuv,cif,qcif,rgb",
895 .value = CODEC_ID_RAWVIDEO,
899 AVOutputFormat rawvideo_muxer = {
909 .flags= AVFMT_NOTIMESTAMPS,
911 #endif //CONFIG_MUXERS
914 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
919 AVOutputFormat null_muxer = {
925 #ifdef WORDS_BIGENDIAN
933 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
935 #endif //CONFIG_MUXERS