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 "libavutil/crc.h"
24 #include "libavcodec/ac3_parser.h"
25 #include "libavcodec/bitstream.h"
26 #include "libavcodec/bytestream.h"
32 static int flac_write_header(struct AVFormatContext *s)
34 static const uint8_t header[8] = {
35 0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22
37 uint8_t *streaminfo = s->streams[0]->codec->extradata;
38 int len = s->streams[0]->codec->extradata_size;
39 if(streaminfo != NULL && len > 0) {
40 put_buffer(s->pb, header, 8);
41 put_buffer(s->pb, streaminfo, len);
47 static int roq_write_header(struct AVFormatContext *s)
49 static const uint8_t header[] = {
50 0x84, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, 0x1E, 0x00
53 put_buffer(s->pb, header, 8);
54 put_flush_packet(s->pb);
59 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
61 put_buffer(s->pb, pkt->data, pkt->size);
62 put_flush_packet(s->pb);
65 #endif //CONFIG_MUXERS
68 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
73 st = av_new_stream(s, 0);
75 return AVERROR(ENOMEM);
77 id = s->iformat->value;
78 if (id == CODEC_ID_RAWVIDEO) {
79 st->codec->codec_type = CODEC_TYPE_VIDEO;
81 st->codec->codec_type = CODEC_TYPE_AUDIO;
83 st->codec->codec_id = id;
85 switch(st->codec->codec_type) {
86 case CODEC_TYPE_AUDIO:
87 st->codec->sample_rate = ap->sample_rate;
88 st->codec->channels = ap->channels;
89 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
91 case CODEC_TYPE_VIDEO:
93 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
95 av_set_pts_info(st, 64, 1, 25);
96 st->codec->width = ap->width;
97 st->codec->height = ap->height;
98 st->codec->pix_fmt = ap->pix_fmt;
99 if(st->codec->pix_fmt == PIX_FMT_NONE)
100 st->codec->pix_fmt= PIX_FMT_YUV420P;
108 #define RAW_PACKET_SIZE 1024
110 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
113 // AVStream *st = s->streams[0];
115 size= RAW_PACKET_SIZE;
117 ret= av_get_packet(s->pb, pkt, size);
119 pkt->stream_index = 0;
123 /* note: we need to modify the packet size here to handle the last
127 bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
128 assert(bps); // if false there IS a bug elsewhere (NOT in this function)
130 pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);
135 static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
139 size = RAW_PACKET_SIZE;
141 if (av_new_packet(pkt, size) < 0)
144 pkt->pos= url_ftell(s->pb);
145 pkt->stream_index = 0;
146 ret = get_partial_buffer(s->pb, pkt->data, size);
155 // http://www.artificis.hu/files/texts/ingenient.txt
156 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
158 int ret, size, w, h, unk1, unk2;
160 if (get_le32(s->pb) != MKTAG('M', 'J', 'P', 'G'))
161 return AVERROR(EIO); // FIXME
163 size = get_le32(s->pb);
168 url_fskip(s->pb, 8); // zero + size (padded?)
170 unk1 = get_le16(s->pb);
171 unk2 = get_le16(s->pb);
172 url_fskip(s->pb, 22); // ascii timestamp
174 av_log(NULL, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
175 size, w, h, unk1, unk2);
177 if (av_new_packet(pkt, size) < 0)
180 pkt->pos = url_ftell(s->pb);
181 pkt->stream_index = 0;
182 ret = get_buffer(s->pb, pkt->data, size);
191 static int raw_read_close(AVFormatContext *s)
196 int pcm_read_seek(AVFormatContext *s,
197 int stream_index, int64_t timestamp, int flags)
200 int block_align, byte_rate;
205 block_align = st->codec->block_align ? st->codec->block_align :
206 (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
207 byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 :
208 block_align * st->codec->sample_rate;
210 if (block_align <= 0 || byte_rate <= 0)
213 /* compute the position by aligning it to block_align */
214 pos = av_rescale_rnd(timestamp * byte_rate,
216 st->time_base.den * (int64_t)block_align,
217 (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
220 /* recompute exact position */
221 st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
222 url_fseek(s->pb, pos + s->data_offset, SEEK_SET);
226 static int audio_read_header(AVFormatContext *s,
227 AVFormatParameters *ap)
229 AVStream *st = av_new_stream(s, 0);
231 return AVERROR(ENOMEM);
232 st->codec->codec_type = CODEC_TYPE_AUDIO;
233 st->codec->codec_id = s->iformat->value;
234 st->need_parsing = AVSTREAM_PARSE_FULL;
235 /* the parameters will be extracted from the compressed bitstream */
239 /* mpeg1/h263 input */
240 static int video_read_header(AVFormatContext *s,
241 AVFormatParameters *ap)
245 st = av_new_stream(s, 0);
247 return AVERROR(ENOMEM);
249 st->codec->codec_type = CODEC_TYPE_VIDEO;
250 st->codec->codec_id = s->iformat->value;
251 st->need_parsing = AVSTREAM_PARSE_FULL;
253 /* for mjpeg, specify frame rate */
254 /* for mpeg4 specify it too (most mpeg4 streams do not have the fixed_vop_rate set ...)*/
255 if (ap->time_base.num) {
256 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
257 } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
258 st->codec->codec_id == CODEC_ID_MPEG4 ||
259 st->codec->codec_id == CODEC_ID_DIRAC ||
260 st->codec->codec_id == CODEC_ID_H264) {
261 av_set_pts_info(st, 64, 1, 25);
267 #define SEQ_START_CODE 0x000001b3
268 #define GOP_START_CODE 0x000001b8
269 #define PICTURE_START_CODE 0x00000100
270 #define SLICE_START_CODE 0x00000101
271 #define PACK_START_CODE 0x000001ba
272 #define VIDEO_ID 0x000001e0
273 #define AUDIO_ID 0x000001c0
275 static int mpegvideo_probe(AVProbeData *p)
278 int pic=0, seq=0, slice=0, pspack=0, pes=0;
281 for(i=0; i<p->buf_size; i++){
282 code = (code<<8) + p->buf[i];
283 if ((code & 0xffffff00) == 0x100) {
285 case SEQ_START_CODE: seq++; break;
286 case PICTURE_START_CODE: pic++; break;
287 case SLICE_START_CODE: slice++; break;
288 case PACK_START_CODE: pspack++; break;
290 if ((code & 0x1f0) == VIDEO_ID) pes++;
291 else if((code & 0x1e0) == AUDIO_ID) pes++;
294 if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
295 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
299 #define VISUAL_OBJECT_START_CODE 0x000001b5
300 #define VOP_START_CODE 0x000001b6
302 static int mpeg4video_probe(AVProbeData *probe_packet)
304 uint32_t temp_buffer= -1;
305 int VO=0, VOL=0, VOP = 0, VISO = 0, res=0;
308 for(i=0; i<probe_packet->buf_size; i++){
309 temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
310 if ((temp_buffer & 0xffffff00) != 0x100)
313 if (temp_buffer == VOP_START_CODE) VOP++;
314 else if (temp_buffer == VISUAL_OBJECT_START_CODE) VISO++;
315 else if (temp_buffer < 0x120) VO++;
316 else if (temp_buffer < 0x130) VOL++;
317 else if ( !(0x1AF < temp_buffer && temp_buffer < 0x1B7)
318 && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++;
321 if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0)
322 return AVPROBE_SCORE_MAX/2;
326 static int h263_probe(AVProbeData *p)
332 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
339 static int h261_probe(AVProbeData *p)
345 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
352 #define DCA_MARKER_14B_BE 0x1FFFE800
353 #define DCA_MARKER_14B_LE 0xFF1F00E8
354 #define DCA_MARKER_RAW_BE 0x7FFE8001
355 #define DCA_MARKER_RAW_LE 0xFE7F0180
356 static int dts_probe(AVProbeData *p)
358 const uint8_t *buf, *bufp;
363 for(; buf < (p->buf+p->buf_size)-2; buf+=2) {
365 state = (state << 16) | bytestream_get_be16(&bufp);
367 /* Regular bitstream */
368 if (state == DCA_MARKER_RAW_BE || state == DCA_MARKER_RAW_LE)
369 return AVPROBE_SCORE_MAX/2+1;
371 /* 14 bits big endian bitstream */
372 if (state == DCA_MARKER_14B_BE)
373 if ((bytestream_get_be16(&bufp) & 0xFFF0) == 0x07F0)
374 return AVPROBE_SCORE_MAX/2+1;
376 /* 14 bits little endian bitstream */
377 if (state == DCA_MARKER_14B_LE)
378 if ((bytestream_get_be16(&bufp) & 0xF0FF) == 0xF007)
379 return AVPROBE_SCORE_MAX/2+1;
385 static int dirac_probe(AVProbeData *p)
387 if (AV_RL32(p->buf) == MKTAG('B', 'B', 'C', 'D'))
388 return AVPROBE_SCORE_MAX;
393 static int ac3_probe(AVProbeData *p)
395 int max_frames, first_frames = 0, frames;
396 uint8_t *buf, *buf2, *end;
402 end = buf + p->buf_size;
404 for(; buf < end; buf++) {
407 for(frames = 0; buf2 < end; frames++) {
408 init_get_bits(&gbc, buf2, 54);
409 if(ff_ac3_parse_header(&gbc, &hdr) < 0)
411 if(buf2 + hdr.frame_size > end ||
412 av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, buf2 + 2, hdr.frame_size - 2))
414 buf2 += hdr.frame_size;
416 max_frames = FFMAX(max_frames, frames);
418 first_frames = frames;
420 if (first_frames>=3) return AVPROBE_SCORE_MAX * 3 / 4;
421 else if(max_frames>=3) return AVPROBE_SCORE_MAX / 2;
422 else if(max_frames>=1) return 1;
426 static int flac_probe(AVProbeData *p)
428 if(memcmp(p->buf, "fLaC", 4)) return 0;
429 else return AVPROBE_SCORE_MAX / 2;
432 AVInputFormat shorten_demuxer = {
434 NULL_IF_CONFIG_SMALL("raw Shorten"),
438 raw_read_partial_packet,
440 .flags= AVFMT_GENERIC_INDEX,
442 .value = CODEC_ID_SHORTEN,
445 AVInputFormat mlp_demuxer = {
447 NULL_IF_CONFIG_SMALL("raw MLP"),
451 raw_read_partial_packet,
453 .flags= AVFMT_GENERIC_INDEX,
455 .value = CODEC_ID_MLP,
458 AVInputFormat flac_demuxer = {
460 NULL_IF_CONFIG_SMALL("raw FLAC"),
464 raw_read_partial_packet,
466 .flags= AVFMT_GENERIC_INDEX,
467 .extensions = "flac",
468 .value = CODEC_ID_FLAC,
472 AVOutputFormat flac_muxer = {
474 NULL_IF_CONFIG_SMALL("raw FLAC"),
482 .flags= AVFMT_NOTIMESTAMPS,
484 #endif //CONFIG_MUXERS
486 #ifdef CONFIG_AC3_DEMUXER
487 AVInputFormat ac3_demuxer = {
489 NULL_IF_CONFIG_SMALL("raw AC-3"),
493 raw_read_partial_packet,
495 .flags= AVFMT_GENERIC_INDEX,
497 .value = CODEC_ID_AC3,
502 AVOutputFormat ac3_muxer = {
504 NULL_IF_CONFIG_SMALL("raw AC-3"),
512 .flags= AVFMT_NOTIMESTAMPS,
515 AVOutputFormat dts_muxer = {
517 NULL_IF_CONFIG_SMALL("raw DTS"),
525 .flags= AVFMT_NOTIMESTAMPS,
528 #endif //CONFIG_MUXERS
530 AVInputFormat dirac_demuxer = {
532 NULL_IF_CONFIG_SMALL("raw Dirac"),
536 raw_read_partial_packet,
538 .flags= AVFMT_GENERIC_INDEX,
539 .value = CODEC_ID_DIRAC,
543 AVOutputFormat dirac_muxer = {
545 NULL_IF_CONFIG_SMALL("raw Dirac"),
553 .flags= AVFMT_NOTIMESTAMPS,
557 AVInputFormat dts_demuxer = {
559 NULL_IF_CONFIG_SMALL("raw DTS"),
563 raw_read_partial_packet,
565 .flags= AVFMT_GENERIC_INDEX,
567 .value = CODEC_ID_DTS,
570 AVInputFormat aac_demuxer = {
572 NULL_IF_CONFIG_SMALL("ADTS AAC"),
576 raw_read_partial_packet,
578 .flags= AVFMT_GENERIC_INDEX,
580 .value = CODEC_ID_AAC,
583 AVInputFormat gsm_demuxer = {
585 NULL_IF_CONFIG_SMALL("GSM"),
589 raw_read_partial_packet,
591 .flags= AVFMT_GENERIC_INDEX,
593 .value = CODEC_ID_GSM,
596 #ifdef CONFIG_ROQ_MUXER
597 AVOutputFormat roq_muxer =
600 NULL_IF_CONFIG_SMALL("id RoQ format"),
609 #endif //CONFIG_ROQ_MUXER
611 AVInputFormat h261_demuxer = {
613 NULL_IF_CONFIG_SMALL("raw H.261"),
617 raw_read_partial_packet,
619 .flags= AVFMT_GENERIC_INDEX,
620 .extensions = "h261",
621 .value = CODEC_ID_H261,
625 AVOutputFormat h261_muxer = {
627 NULL_IF_CONFIG_SMALL("raw H.261"),
635 .flags= AVFMT_NOTIMESTAMPS,
637 #endif //CONFIG_MUXERS
639 AVInputFormat h263_demuxer = {
641 NULL_IF_CONFIG_SMALL("raw H.263"),
645 raw_read_partial_packet,
647 .flags= AVFMT_GENERIC_INDEX,
648 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
649 .value = CODEC_ID_H263,
653 AVOutputFormat h263_muxer = {
655 NULL_IF_CONFIG_SMALL("raw H.263"),
663 .flags= AVFMT_NOTIMESTAMPS,
665 #endif //CONFIG_MUXERS
667 AVInputFormat m4v_demuxer = {
669 NULL_IF_CONFIG_SMALL("raw MPEG-4 video format"),
671 mpeg4video_probe, /** probing for mpeg4 data */
673 raw_read_partial_packet,
675 .flags= AVFMT_GENERIC_INDEX,
676 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
677 .value = CODEC_ID_MPEG4,
681 AVOutputFormat m4v_muxer = {
683 NULL_IF_CONFIG_SMALL("raw MPEG-4 video format"),
691 .flags= AVFMT_NOTIMESTAMPS,
693 #endif //CONFIG_MUXERS
695 AVInputFormat h264_demuxer = {
697 NULL_IF_CONFIG_SMALL("raw H.264 video format"),
699 NULL /*mpegvideo_probe*/,
701 raw_read_partial_packet,
703 .flags= AVFMT_GENERIC_INDEX,
704 .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
705 .value = CODEC_ID_H264,
709 AVOutputFormat h264_muxer = {
711 NULL_IF_CONFIG_SMALL("raw H.264 video format"),
719 .flags= AVFMT_NOTIMESTAMPS,
721 #endif //CONFIG_MUXERS
723 AVInputFormat mpegvideo_demuxer = {
725 NULL_IF_CONFIG_SMALL("MPEG video"),
729 raw_read_partial_packet,
731 .flags= AVFMT_GENERIC_INDEX,
732 .value = CODEC_ID_MPEG1VIDEO,
736 AVOutputFormat mpeg1video_muxer = {
738 NULL_IF_CONFIG_SMALL("MPEG video"),
746 .flags= AVFMT_NOTIMESTAMPS,
748 #endif //CONFIG_MUXERS
751 AVOutputFormat mpeg2video_muxer = {
753 NULL_IF_CONFIG_SMALL("MPEG-2 video"),
761 .flags= AVFMT_NOTIMESTAMPS,
763 #endif //CONFIG_MUXERS
765 AVInputFormat mjpeg_demuxer = {
767 NULL_IF_CONFIG_SMALL("MJPEG video"),
771 raw_read_partial_packet,
773 .flags= AVFMT_GENERIC_INDEX,
774 .extensions = "mjpg,mjpeg",
775 .value = CODEC_ID_MJPEG,
778 AVInputFormat ingenient_demuxer = {
780 NULL_IF_CONFIG_SMALL("Ingenient MJPEG"),
784 ingenient_read_packet,
786 .flags= AVFMT_GENERIC_INDEX,
787 .extensions = "cgi", // FIXME
788 .value = CODEC_ID_MJPEG,
792 AVOutputFormat mjpeg_muxer = {
794 NULL_IF_CONFIG_SMALL("MJPEG video"),
802 .flags= AVFMT_NOTIMESTAMPS,
804 #endif //CONFIG_MUXERS
806 AVInputFormat vc1_demuxer = {
808 NULL_IF_CONFIG_SMALL("raw VC-1"),
810 NULL /* vc1_probe */,
812 raw_read_partial_packet,
815 .value = CODEC_ID_VC1,
820 #define PCMINPUTDEF(name, long_name, ext, codec) \
821 AVInputFormat pcm_ ## name ## _demuxer = {\
823 NULL_IF_CONFIG_SMALL(long_name),\
830 .flags= AVFMT_GENERIC_INDEX,\
835 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
836 AVOutputFormat pcm_ ## name ## _muxer = {\
838 NULL_IF_CONFIG_SMALL(long_name),\
846 .flags= AVFMT_NOTIMESTAMPS,\
850 #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
851 #define PCMDEF(name, long_name, ext, codec) \
852 PCMINPUTDEF(name, long_name, ext, codec)
853 #elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
854 #define PCMDEF(name, long_name, ext, codec) \
855 PCMOUTPUTDEF(name, long_name, ext, codec)
856 #elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
857 #define PCMDEF(name, long_name, ext, codec) \
858 PCMINPUTDEF(name, long_name, ext, codec)\
859 PCMOUTPUTDEF(name, long_name, ext, codec)
861 #define PCMDEF(name, long_name, ext, codec)
864 #ifdef WORDS_BIGENDIAN
866 #define LE_DEF(s) NULL
868 #define BE_DEF(s) NULL
873 PCMDEF(s16le, "pcm signed 16 bit little endian format",
874 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
876 PCMDEF(s16be, "pcm signed 16 bit big endian format",
877 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
879 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
880 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
882 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
883 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
885 PCMDEF(s8, "pcm signed 8 bit format",
886 "sb", CODEC_ID_PCM_S8)
888 PCMDEF(u8, "pcm unsigned 8 bit format",
889 "ub", CODEC_ID_PCM_U8)
891 PCMDEF(mulaw, "pcm mu law format",
892 "ul", CODEC_ID_PCM_MULAW)
894 PCMDEF(alaw, "pcm A law format",
895 "al", CODEC_ID_PCM_ALAW)
897 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
899 int packet_size, ret, width, height;
900 AVStream *st = s->streams[0];
902 width = st->codec->width;
903 height = st->codec->height;
905 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
909 ret= av_get_packet(s->pb, pkt, packet_size);
911 pkt->dts= pkt->pos / packet_size;
913 pkt->stream_index = 0;
914 if (ret != packet_size) {
921 AVInputFormat rawvideo_demuxer = {
923 NULL_IF_CONFIG_SMALL("raw video format"),
927 rawvideo_read_packet,
929 .flags= AVFMT_GENERIC_INDEX,
930 .extensions = "yuv,cif,qcif,rgb",
931 .value = CODEC_ID_RAWVIDEO,
935 AVOutputFormat rawvideo_muxer = {
937 NULL_IF_CONFIG_SMALL("raw video format"),
945 .flags= AVFMT_NOTIMESTAMPS,
947 #endif //CONFIG_MUXERS
950 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
955 AVOutputFormat null_muxer = {
957 NULL_IF_CONFIG_SMALL("null video format"),
961 #ifdef WORDS_BIGENDIAN
969 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
971 #endif //CONFIG_MUXERS