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"
26 #include "bitstream.h"
30 static int flac_write_header(struct AVFormatContext *s)
32 static const uint8_t header[8] = {
33 0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22
35 uint8_t *streaminfo = s->streams[0]->codec->extradata;
36 int len = s->streams[0]->codec->extradata_size;
37 if(streaminfo != NULL && len > 0) {
38 put_buffer(s->pb, header, 8);
39 put_buffer(s->pb, streaminfo, len);
45 static int roq_write_header(struct AVFormatContext *s)
47 static const uint8_t header[] = {
48 0x84, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, 0x1E, 0x00
51 put_buffer(s->pb, header, 8);
52 put_flush_packet(s->pb);
57 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
59 put_buffer(s->pb, pkt->data, pkt->size);
60 put_flush_packet(s->pb);
63 #endif //CONFIG_MUXERS
66 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
71 st = av_new_stream(s, 0);
73 return AVERROR(ENOMEM);
75 id = s->iformat->value;
76 if (id == CODEC_ID_RAWVIDEO) {
77 st->codec->codec_type = CODEC_TYPE_VIDEO;
79 st->codec->codec_type = CODEC_TYPE_AUDIO;
81 st->codec->codec_id = id;
83 switch(st->codec->codec_type) {
84 case CODEC_TYPE_AUDIO:
85 st->codec->sample_rate = ap->sample_rate;
86 st->codec->channels = ap->channels;
87 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
89 case CODEC_TYPE_VIDEO:
91 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
93 av_set_pts_info(st, 64, 1, 25);
94 st->codec->width = ap->width;
95 st->codec->height = ap->height;
96 st->codec->pix_fmt = ap->pix_fmt;
97 if(st->codec->pix_fmt == PIX_FMT_NONE)
98 st->codec->pix_fmt= PIX_FMT_YUV420P;
106 #define RAW_PACKET_SIZE 1024
108 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
111 // AVStream *st = s->streams[0];
113 size= RAW_PACKET_SIZE;
115 ret= av_get_packet(s->pb, pkt, size);
117 pkt->stream_index = 0;
121 /* note: we need to modify the packet size here to handle the last
125 bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
126 assert(bps); // if false there IS a bug elsewhere (NOT in this function)
128 pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);
133 static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
137 size = RAW_PACKET_SIZE;
139 if (av_new_packet(pkt, size) < 0)
142 pkt->pos= url_ftell(s->pb);
143 pkt->stream_index = 0;
144 ret = get_partial_buffer(s->pb, pkt->data, size);
153 // http://www.artificis.hu/files/texts/ingenient.txt
154 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
156 int ret, size, w, h, unk1, unk2;
158 if (get_le32(s->pb) != MKTAG('M', 'J', 'P', 'G'))
159 return AVERROR(EIO); // FIXME
161 size = get_le32(s->pb);
166 url_fskip(s->pb, 8); // zero + size (padded?)
168 unk1 = get_le16(s->pb);
169 unk2 = get_le16(s->pb);
170 url_fskip(s->pb, 22); // ascii timestamp
172 av_log(NULL, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
173 size, w, h, unk1, unk2);
175 if (av_new_packet(pkt, size) < 0)
178 pkt->pos = url_ftell(s->pb);
179 pkt->stream_index = 0;
180 ret = get_buffer(s->pb, pkt->data, size);
189 static int raw_read_close(AVFormatContext *s)
194 int pcm_read_seek(AVFormatContext *s,
195 int stream_index, int64_t timestamp, int flags)
198 int block_align, byte_rate;
203 block_align = st->codec->block_align ? st->codec->block_align :
204 (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
205 byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 :
206 block_align * st->codec->sample_rate;
208 if (block_align <= 0 || byte_rate <= 0)
211 /* compute the position by aligning it to block_align */
212 pos = av_rescale_rnd(timestamp * byte_rate,
214 st->time_base.den * (int64_t)block_align,
215 (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
218 /* recompute exact position */
219 st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
220 url_fseek(s->pb, pos + s->data_offset, SEEK_SET);
225 static int ac3_read_header(AVFormatContext *s,
226 AVFormatParameters *ap)
230 st = av_new_stream(s, 0);
232 return AVERROR(ENOMEM);
234 st->codec->codec_type = CODEC_TYPE_AUDIO;
235 st->codec->codec_id = CODEC_ID_AC3;
236 st->need_parsing = AVSTREAM_PARSE_FULL;
237 /* the parameters will be extracted from the compressed bitstream */
241 static int shorten_read_header(AVFormatContext *s,
242 AVFormatParameters *ap)
246 st = av_new_stream(s, 0);
248 return AVERROR(ENOMEM);
249 st->codec->codec_type = CODEC_TYPE_AUDIO;
250 st->codec->codec_id = CODEC_ID_SHORTEN;
251 st->need_parsing = AVSTREAM_PARSE_FULL;
252 /* the parameters will be extracted from the compressed bitstream */
257 static int flac_read_header(AVFormatContext *s,
258 AVFormatParameters *ap)
262 st = av_new_stream(s, 0);
264 return AVERROR(ENOMEM);
265 st->codec->codec_type = CODEC_TYPE_AUDIO;
266 st->codec->codec_id = CODEC_ID_FLAC;
267 st->need_parsing = AVSTREAM_PARSE_FULL;
268 /* the parameters will be extracted from the compressed bitstream */
273 static int dts_read_header(AVFormatContext *s,
274 AVFormatParameters *ap)
278 st = av_new_stream(s, 0);
280 return AVERROR(ENOMEM);
282 st->codec->codec_type = CODEC_TYPE_AUDIO;
283 st->codec->codec_id = CODEC_ID_DTS;
284 st->need_parsing = AVSTREAM_PARSE_FULL;
285 /* the parameters will be extracted from the compressed bitstream */
290 static int aac_read_header(AVFormatContext *s,
291 AVFormatParameters *ap)
295 st = av_new_stream(s, 0);
297 return AVERROR(ENOMEM);
299 st->codec->codec_type = CODEC_TYPE_AUDIO;
300 st->codec->codec_id = CODEC_ID_AAC;
301 st->need_parsing = AVSTREAM_PARSE_FULL;
302 /* the parameters will be extracted from the compressed bitstream */
306 /* mpeg1/h263 input */
307 static int video_read_header(AVFormatContext *s,
308 AVFormatParameters *ap)
312 st = av_new_stream(s, 0);
314 return AVERROR(ENOMEM);
316 st->codec->codec_type = CODEC_TYPE_VIDEO;
317 st->codec->codec_id = s->iformat->value;
318 st->need_parsing = AVSTREAM_PARSE_FULL;
320 /* for mjpeg, specify frame rate */
321 /* for mpeg4 specify it too (most mpeg4 streams do not have the fixed_vop_rate set ...)*/
322 if (ap->time_base.num) {
323 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
324 } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
325 st->codec->codec_id == CODEC_ID_MPEG4 ||
326 st->codec->codec_id == CODEC_ID_H264) {
327 av_set_pts_info(st, 64, 1, 25);
333 #define SEQ_START_CODE 0x000001b3
334 #define GOP_START_CODE 0x000001b8
335 #define PICTURE_START_CODE 0x00000100
336 #define SLICE_START_CODE 0x00000101
337 #define PACK_START_CODE 0x000001ba
338 #define VIDEO_ID 0x000001e0
339 #define AUDIO_ID 0x000001c0
341 static int mpegvideo_probe(AVProbeData *p)
344 int pic=0, seq=0, slice=0, pspack=0, pes=0;
347 for(i=0; i<p->buf_size; i++){
348 code = (code<<8) + p->buf[i];
349 if ((code & 0xffffff00) == 0x100) {
351 case SEQ_START_CODE: seq++; break;
352 case PICTURE_START_CODE: pic++; break;
353 case SLICE_START_CODE: slice++; break;
354 case PACK_START_CODE: pspack++; break;
356 if ((code & 0x1f0) == VIDEO_ID) pes++;
357 else if((code & 0x1e0) == AUDIO_ID) pes++;
360 if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
361 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
365 #define VISUAL_OBJECT_START_CODE 0x000001b5
366 #define VOP_START_CODE 0x000001b6
368 static int mpeg4video_probe(AVProbeData *probe_packet)
370 uint32_t temp_buffer= -1;
371 int VO=0, VOL=0, VOP = 0, VISO = 0, res=0;
374 for(i=0; i<probe_packet->buf_size; i++){
375 temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
376 if ((temp_buffer & 0xffffff00) != 0x100)
379 if (temp_buffer == VOP_START_CODE) VOP++;
380 else if (temp_buffer == VISUAL_OBJECT_START_CODE) VISO++;
381 else if (temp_buffer < 0x120) VO++;
382 else if (temp_buffer < 0x130) VOL++;
383 else if ( !(0x1AF < temp_buffer && temp_buffer < 0x1B7)
384 && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++;
387 if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0)
388 return AVPROBE_SCORE_MAX/2;
392 static int h263_probe(AVProbeData *p)
398 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
405 static int h261_probe(AVProbeData *p)
411 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
418 static int ac3_probe(AVProbeData *p)
420 int max_frames, first_frames = 0, frames;
421 uint8_t *buf, *buf2, *end;
427 end = buf + p->buf_size;
429 for(; buf < end; buf++) {
432 for(frames = 0; buf2 < end; frames++) {
433 init_get_bits(&gbc, buf2, 54);
434 if(ff_ac3_parse_header(&gbc, &hdr) < 0)
436 if(buf2 + hdr.frame_size > end ||
437 av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, buf2 + 2, hdr.frame_size - 2))
439 buf2 += hdr.frame_size;
441 max_frames = FFMAX(max_frames, frames);
443 first_frames = frames;
445 if (first_frames>=3) return AVPROBE_SCORE_MAX * 3 / 4;
446 else if(max_frames>=3) return AVPROBE_SCORE_MAX / 2;
447 else if(max_frames>=1) return 1;
451 static int flac_probe(AVProbeData *p)
453 if(memcmp(p->buf, "fLaC", 4)) return 0;
454 else return AVPROBE_SCORE_MAX / 2;
457 AVInputFormat shorten_demuxer = {
463 raw_read_partial_packet,
465 .flags= AVFMT_GENERIC_INDEX,
469 AVInputFormat flac_demuxer = {
475 raw_read_partial_packet,
477 .flags= AVFMT_GENERIC_INDEX,
478 .extensions = "flac",
482 AVOutputFormat flac_muxer = {
492 .flags= AVFMT_NOTIMESTAMPS,
494 #endif //CONFIG_MUXERS
496 #ifdef CONFIG_AC3_DEMUXER
497 AVInputFormat ac3_demuxer = {
503 raw_read_partial_packet,
505 .flags= AVFMT_GENERIC_INDEX,
511 AVOutputFormat ac3_muxer = {
521 .flags= AVFMT_NOTIMESTAMPS,
524 AVOutputFormat dts_muxer = {
534 .flags= AVFMT_NOTIMESTAMPS,
537 #endif //CONFIG_MUXERS
539 AVInputFormat dts_demuxer = {
545 raw_read_partial_packet,
547 .flags= AVFMT_GENERIC_INDEX,
551 AVInputFormat aac_demuxer = {
557 raw_read_partial_packet,
559 .flags= AVFMT_GENERIC_INDEX,
563 #ifdef CONFIG_ROQ_MUXER
564 AVOutputFormat roq_muxer =
576 #endif //CONFIG_ROQ_MUXER
578 AVInputFormat h261_demuxer = {
584 raw_read_partial_packet,
586 .flags= AVFMT_GENERIC_INDEX,
587 .extensions = "h261",
588 .value = CODEC_ID_H261,
592 AVOutputFormat h261_muxer = {
602 .flags= AVFMT_NOTIMESTAMPS,
604 #endif //CONFIG_MUXERS
606 AVInputFormat h263_demuxer = {
612 raw_read_partial_packet,
614 .flags= AVFMT_GENERIC_INDEX,
615 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
616 .value = CODEC_ID_H263,
620 AVOutputFormat h263_muxer = {
630 .flags= AVFMT_NOTIMESTAMPS,
632 #endif //CONFIG_MUXERS
634 AVInputFormat m4v_demuxer = {
636 "raw MPEG4 video format",
638 mpeg4video_probe, /** probing for mpeg4 data */
640 raw_read_partial_packet,
642 .flags= AVFMT_GENERIC_INDEX,
643 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
644 .value = CODEC_ID_MPEG4,
648 AVOutputFormat m4v_muxer = {
650 "raw MPEG4 video format",
658 .flags= AVFMT_NOTIMESTAMPS,
660 #endif //CONFIG_MUXERS
662 AVInputFormat h264_demuxer = {
664 "raw H264 video format",
666 NULL /*mpegvideo_probe*/,
668 raw_read_partial_packet,
670 .flags= AVFMT_GENERIC_INDEX,
671 .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
672 .value = CODEC_ID_H264,
676 AVOutputFormat h264_muxer = {
678 "raw H264 video format",
686 .flags= AVFMT_NOTIMESTAMPS,
688 #endif //CONFIG_MUXERS
690 AVInputFormat mpegvideo_demuxer = {
696 raw_read_partial_packet,
698 .flags= AVFMT_GENERIC_INDEX,
699 .value = CODEC_ID_MPEG1VIDEO,
703 AVOutputFormat mpeg1video_muxer = {
713 .flags= AVFMT_NOTIMESTAMPS,
715 #endif //CONFIG_MUXERS
718 AVOutputFormat mpeg2video_muxer = {
728 .flags= AVFMT_NOTIMESTAMPS,
730 #endif //CONFIG_MUXERS
732 AVInputFormat mjpeg_demuxer = {
738 raw_read_partial_packet,
740 .flags= AVFMT_GENERIC_INDEX,
741 .extensions = "mjpg,mjpeg",
742 .value = CODEC_ID_MJPEG,
745 AVInputFormat ingenient_demuxer = {
751 ingenient_read_packet,
753 .flags= AVFMT_GENERIC_INDEX,
754 .extensions = "cgi", // FIXME
755 .value = CODEC_ID_MJPEG,
759 AVOutputFormat mjpeg_muxer = {
769 .flags= AVFMT_NOTIMESTAMPS,
771 #endif //CONFIG_MUXERS
773 AVInputFormat vc1_demuxer = {
777 NULL /* vc1_probe */,
779 raw_read_partial_packet,
782 .value = CODEC_ID_VC1,
787 #define PCMINPUTDEF(name, long_name, ext, codec) \
788 AVInputFormat pcm_ ## name ## _demuxer = {\
797 .flags= AVFMT_GENERIC_INDEX,\
802 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
803 AVOutputFormat pcm_ ## name ## _muxer = {\
813 .flags= AVFMT_NOTIMESTAMPS,\
817 #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
818 #define PCMDEF(name, long_name, ext, codec) \
819 PCMINPUTDEF(name, long_name, ext, codec)
820 #elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
821 #define PCMDEF(name, long_name, ext, codec) \
822 PCMOUTPUTDEF(name, long_name, ext, codec)
823 #elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
824 #define PCMDEF(name, long_name, ext, codec) \
825 PCMINPUTDEF(name, long_name, ext, codec)\
826 PCMOUTPUTDEF(name, long_name, ext, codec)
828 #define PCMDEF(name, long_name, ext, codec)
831 #ifdef WORDS_BIGENDIAN
833 #define LE_DEF(s) NULL
835 #define BE_DEF(s) NULL
840 PCMDEF(s16le, "pcm signed 16 bit little endian format",
841 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
843 PCMDEF(s16be, "pcm signed 16 bit big endian format",
844 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
846 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
847 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
849 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
850 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
852 PCMDEF(s8, "pcm signed 8 bit format",
853 "sb", CODEC_ID_PCM_S8)
855 PCMDEF(u8, "pcm unsigned 8 bit format",
856 "ub", CODEC_ID_PCM_U8)
858 PCMDEF(mulaw, "pcm mu law format",
859 "ul", CODEC_ID_PCM_MULAW)
861 PCMDEF(alaw, "pcm A law format",
862 "al", CODEC_ID_PCM_ALAW)
864 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
866 int packet_size, ret, width, height;
867 AVStream *st = s->streams[0];
869 width = st->codec->width;
870 height = st->codec->height;
872 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
876 ret= av_get_packet(s->pb, pkt, packet_size);
878 pkt->dts= pkt->pos / packet_size;
880 pkt->stream_index = 0;
881 if (ret != packet_size) {
888 AVInputFormat rawvideo_demuxer = {
894 rawvideo_read_packet,
896 .flags= AVFMT_GENERIC_INDEX,
897 .extensions = "yuv,cif,qcif,rgb",
898 .value = CODEC_ID_RAWVIDEO,
902 AVOutputFormat rawvideo_muxer = {
912 .flags= AVFMT_NOTIMESTAMPS,
914 #endif //CONFIG_MUXERS
917 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
922 AVOutputFormat null_muxer = {
928 #ifdef WORDS_BIGENDIAN
936 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
938 #endif //CONFIG_MUXERS