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"
27 #include "bytestream.h"
31 static int flac_write_header(struct AVFormatContext *s)
33 static const uint8_t header[8] = {
34 0x66, 0x4C, 0x61, 0x43, 0x80, 0x00, 0x00, 0x22
36 uint8_t *streaminfo = s->streams[0]->codec->extradata;
37 int len = s->streams[0]->codec->extradata_size;
38 if(streaminfo != NULL && len > 0) {
39 put_buffer(s->pb, header, 8);
40 put_buffer(s->pb, streaminfo, len);
46 static int roq_write_header(struct AVFormatContext *s)
48 static const uint8_t header[] = {
49 0x84, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, 0x1E, 0x00
52 put_buffer(s->pb, header, 8);
53 put_flush_packet(s->pb);
58 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
60 put_buffer(s->pb, pkt->data, pkt->size);
61 put_flush_packet(s->pb);
64 #endif //CONFIG_MUXERS
67 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
72 st = av_new_stream(s, 0);
74 return AVERROR(ENOMEM);
76 id = s->iformat->value;
77 if (id == CODEC_ID_RAWVIDEO) {
78 st->codec->codec_type = CODEC_TYPE_VIDEO;
80 st->codec->codec_type = CODEC_TYPE_AUDIO;
82 st->codec->codec_id = id;
84 switch(st->codec->codec_type) {
85 case CODEC_TYPE_AUDIO:
86 st->codec->sample_rate = ap->sample_rate;
87 st->codec->channels = ap->channels;
88 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
90 case CODEC_TYPE_VIDEO:
92 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
94 av_set_pts_info(st, 64, 1, 25);
95 st->codec->width = ap->width;
96 st->codec->height = ap->height;
97 st->codec->pix_fmt = ap->pix_fmt;
98 if(st->codec->pix_fmt == PIX_FMT_NONE)
99 st->codec->pix_fmt= PIX_FMT_YUV420P;
107 #define RAW_PACKET_SIZE 1024
109 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
112 // AVStream *st = s->streams[0];
114 size= RAW_PACKET_SIZE;
116 ret= av_get_packet(s->pb, pkt, size);
118 pkt->stream_index = 0;
122 /* note: we need to modify the packet size here to handle the last
126 bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
127 assert(bps); // if false there IS a bug elsewhere (NOT in this function)
129 pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);
134 static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
138 size = RAW_PACKET_SIZE;
140 if (av_new_packet(pkt, size) < 0)
143 pkt->pos= url_ftell(s->pb);
144 pkt->stream_index = 0;
145 ret = get_partial_buffer(s->pb, pkt->data, size);
154 // http://www.artificis.hu/files/texts/ingenient.txt
155 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
157 int ret, size, w, h, unk1, unk2;
159 if (get_le32(s->pb) != MKTAG('M', 'J', 'P', 'G'))
160 return AVERROR(EIO); // FIXME
162 size = get_le32(s->pb);
167 url_fskip(s->pb, 8); // zero + size (padded?)
169 unk1 = get_le16(s->pb);
170 unk2 = get_le16(s->pb);
171 url_fskip(s->pb, 22); // ascii timestamp
173 av_log(NULL, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
174 size, w, h, unk1, unk2);
176 if (av_new_packet(pkt, size) < 0)
179 pkt->pos = url_ftell(s->pb);
180 pkt->stream_index = 0;
181 ret = get_buffer(s->pb, pkt->data, size);
190 static int raw_read_close(AVFormatContext *s)
195 int pcm_read_seek(AVFormatContext *s,
196 int stream_index, int64_t timestamp, int flags)
199 int block_align, byte_rate;
204 block_align = st->codec->block_align ? st->codec->block_align :
205 (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
206 byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 :
207 block_align * st->codec->sample_rate;
209 if (block_align <= 0 || byte_rate <= 0)
212 /* compute the position by aligning it to block_align */
213 pos = av_rescale_rnd(timestamp * byte_rate,
215 st->time_base.den * (int64_t)block_align,
216 (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
219 /* recompute exact position */
220 st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
221 url_fseek(s->pb, pos + s->data_offset, SEEK_SET);
225 static int audio_read_header(AVFormatContext *s,
226 AVFormatParameters *ap)
228 AVStream *st = av_new_stream(s, 0);
230 return AVERROR(ENOMEM);
231 st->codec->codec_type = CODEC_TYPE_AUDIO;
232 st->codec->codec_id = s->iformat->value;
233 st->need_parsing = AVSTREAM_PARSE_FULL;
234 /* the parameters will be extracted from the compressed bitstream */
238 /* mpeg1/h263 input */
239 static int video_read_header(AVFormatContext *s,
240 AVFormatParameters *ap)
244 st = av_new_stream(s, 0);
246 return AVERROR(ENOMEM);
248 st->codec->codec_type = CODEC_TYPE_VIDEO;
249 st->codec->codec_id = s->iformat->value;
250 st->need_parsing = AVSTREAM_PARSE_FULL;
252 /* for mjpeg, specify frame rate */
253 /* for mpeg4 specify it too (most mpeg4 streams do not have the fixed_vop_rate set ...)*/
254 if (ap->time_base.num) {
255 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
256 } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
257 st->codec->codec_id == CODEC_ID_MPEG4 ||
258 st->codec->codec_id == CODEC_ID_DIRAC ||
259 st->codec->codec_id == CODEC_ID_H264) {
260 av_set_pts_info(st, 64, 1, 25);
266 #define SEQ_START_CODE 0x000001b3
267 #define GOP_START_CODE 0x000001b8
268 #define PICTURE_START_CODE 0x00000100
269 #define SLICE_START_CODE 0x00000101
270 #define PACK_START_CODE 0x000001ba
271 #define VIDEO_ID 0x000001e0
272 #define AUDIO_ID 0x000001c0
274 static int mpegvideo_probe(AVProbeData *p)
277 int pic=0, seq=0, slice=0, pspack=0, pes=0;
280 for(i=0; i<p->buf_size; i++){
281 code = (code<<8) + p->buf[i];
282 if ((code & 0xffffff00) == 0x100) {
284 case SEQ_START_CODE: seq++; break;
285 case PICTURE_START_CODE: pic++; break;
286 case SLICE_START_CODE: slice++; break;
287 case PACK_START_CODE: pspack++; break;
289 if ((code & 0x1f0) == VIDEO_ID) pes++;
290 else if((code & 0x1e0) == AUDIO_ID) pes++;
293 if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
294 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
298 #define VISUAL_OBJECT_START_CODE 0x000001b5
299 #define VOP_START_CODE 0x000001b6
301 static int mpeg4video_probe(AVProbeData *probe_packet)
303 uint32_t temp_buffer= -1;
304 int VO=0, VOL=0, VOP = 0, VISO = 0, res=0;
307 for(i=0; i<probe_packet->buf_size; i++){
308 temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
309 if ((temp_buffer & 0xffffff00) != 0x100)
312 if (temp_buffer == VOP_START_CODE) VOP++;
313 else if (temp_buffer == VISUAL_OBJECT_START_CODE) VISO++;
314 else if (temp_buffer < 0x120) VO++;
315 else if (temp_buffer < 0x130) VOL++;
316 else if ( !(0x1AF < temp_buffer && temp_buffer < 0x1B7)
317 && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++;
320 if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0)
321 return AVPROBE_SCORE_MAX/2;
325 static int h263_probe(AVProbeData *p)
331 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
338 static int h261_probe(AVProbeData *p)
344 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
351 #define DCA_MARKER_14B_BE 0x1FFFE800
352 #define DCA_MARKER_14B_LE 0xFF1F00E8
353 #define DCA_MARKER_RAW_BE 0x7FFE8001
354 #define DCA_MARKER_RAW_LE 0xFE7F0180
355 static int dts_probe(AVProbeData *p)
357 const uint8_t *buf, *bufp;
362 for(; buf < (p->buf+p->buf_size)-2; buf+=2) {
364 state = (state << 16) | bytestream_get_be16(&bufp);
366 /* Regular bitstream */
367 if (state == DCA_MARKER_RAW_BE || state == DCA_MARKER_RAW_LE)
368 return AVPROBE_SCORE_MAX/2+1;
370 /* 14 bits big endian bitstream */
371 if (state == DCA_MARKER_14B_BE)
372 if ((bytestream_get_be16(&bufp) & 0xFFF0) == 0x07F0)
373 return AVPROBE_SCORE_MAX/2+1;
375 /* 14 bits little endian bitstream */
376 if (state == DCA_MARKER_14B_LE)
377 if ((bytestream_get_be16(&bufp) & 0xF0FF) == 0xF007)
378 return AVPROBE_SCORE_MAX/2+1;
384 static int dirac_probe(AVProbeData *p)
386 if (AV_RL32(p->buf) == MKTAG('B', 'B', 'C', 'D'))
387 return AVPROBE_SCORE_MAX;
392 static int ac3_probe(AVProbeData *p)
394 int max_frames, first_frames = 0, frames;
395 uint8_t *buf, *buf2, *end;
401 end = buf + p->buf_size;
403 for(; buf < end; buf++) {
406 for(frames = 0; buf2 < end; frames++) {
407 init_get_bits(&gbc, buf2, 54);
408 if(ff_ac3_parse_header(&gbc, &hdr) < 0)
410 if(buf2 + hdr.frame_size > end ||
411 av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, buf2 + 2, hdr.frame_size - 2))
413 buf2 += hdr.frame_size;
415 max_frames = FFMAX(max_frames, frames);
417 first_frames = frames;
419 if (first_frames>=3) return AVPROBE_SCORE_MAX * 3 / 4;
420 else if(max_frames>=3) return AVPROBE_SCORE_MAX / 2;
421 else if(max_frames>=1) return 1;
425 static int flac_probe(AVProbeData *p)
427 if(memcmp(p->buf, "fLaC", 4)) return 0;
428 else return AVPROBE_SCORE_MAX / 2;
431 AVInputFormat shorten_demuxer = {
437 raw_read_partial_packet,
439 .flags= AVFMT_GENERIC_INDEX,
441 .value = CODEC_ID_SHORTEN,
444 AVInputFormat flac_demuxer = {
450 raw_read_partial_packet,
452 .flags= AVFMT_GENERIC_INDEX,
453 .extensions = "flac",
454 .value = CODEC_ID_FLAC,
458 AVOutputFormat flac_muxer = {
468 .flags= AVFMT_NOTIMESTAMPS,
470 #endif //CONFIG_MUXERS
472 #ifdef CONFIG_AC3_DEMUXER
473 AVInputFormat ac3_demuxer = {
479 raw_read_partial_packet,
481 .flags= AVFMT_GENERIC_INDEX,
483 .value = CODEC_ID_AC3,
488 AVOutputFormat ac3_muxer = {
498 .flags= AVFMT_NOTIMESTAMPS,
501 AVOutputFormat dts_muxer = {
511 .flags= AVFMT_NOTIMESTAMPS,
514 #endif //CONFIG_MUXERS
516 AVInputFormat dirac_demuxer = {
522 raw_read_partial_packet,
524 .flags= AVFMT_GENERIC_INDEX,
525 .value = CODEC_ID_DIRAC,
529 AVOutputFormat dirac_muxer = {
539 .flags= AVFMT_NOTIMESTAMPS,
543 AVInputFormat dts_demuxer = {
549 raw_read_partial_packet,
551 .flags= AVFMT_GENERIC_INDEX,
553 .value = CODEC_ID_DTS,
556 AVInputFormat aac_demuxer = {
562 raw_read_partial_packet,
564 .flags= AVFMT_GENERIC_INDEX,
566 .value = CODEC_ID_AAC,
569 AVInputFormat gsm_demuxer = {
575 raw_read_partial_packet,
577 .flags= AVFMT_GENERIC_INDEX,
579 .value = CODEC_ID_GSM,
582 #ifdef CONFIG_ROQ_MUXER
583 AVOutputFormat roq_muxer =
595 #endif //CONFIG_ROQ_MUXER
597 AVInputFormat h261_demuxer = {
603 raw_read_partial_packet,
605 .flags= AVFMT_GENERIC_INDEX,
606 .extensions = "h261",
607 .value = CODEC_ID_H261,
611 AVOutputFormat h261_muxer = {
621 .flags= AVFMT_NOTIMESTAMPS,
623 #endif //CONFIG_MUXERS
625 AVInputFormat h263_demuxer = {
631 raw_read_partial_packet,
633 .flags= AVFMT_GENERIC_INDEX,
634 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
635 .value = CODEC_ID_H263,
639 AVOutputFormat h263_muxer = {
649 .flags= AVFMT_NOTIMESTAMPS,
651 #endif //CONFIG_MUXERS
653 AVInputFormat m4v_demuxer = {
655 "raw MPEG4 video format",
657 mpeg4video_probe, /** probing for mpeg4 data */
659 raw_read_partial_packet,
661 .flags= AVFMT_GENERIC_INDEX,
662 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
663 .value = CODEC_ID_MPEG4,
667 AVOutputFormat m4v_muxer = {
669 "raw MPEG4 video format",
677 .flags= AVFMT_NOTIMESTAMPS,
679 #endif //CONFIG_MUXERS
681 AVInputFormat h264_demuxer = {
683 "raw H264 video format",
685 NULL /*mpegvideo_probe*/,
687 raw_read_partial_packet,
689 .flags= AVFMT_GENERIC_INDEX,
690 .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
691 .value = CODEC_ID_H264,
695 AVOutputFormat h264_muxer = {
697 "raw H264 video format",
705 .flags= AVFMT_NOTIMESTAMPS,
707 #endif //CONFIG_MUXERS
709 AVInputFormat mpegvideo_demuxer = {
715 raw_read_partial_packet,
717 .flags= AVFMT_GENERIC_INDEX,
718 .value = CODEC_ID_MPEG1VIDEO,
722 AVOutputFormat mpeg1video_muxer = {
732 .flags= AVFMT_NOTIMESTAMPS,
734 #endif //CONFIG_MUXERS
737 AVOutputFormat mpeg2video_muxer = {
747 .flags= AVFMT_NOTIMESTAMPS,
749 #endif //CONFIG_MUXERS
751 AVInputFormat mjpeg_demuxer = {
757 raw_read_partial_packet,
759 .flags= AVFMT_GENERIC_INDEX,
760 .extensions = "mjpg,mjpeg",
761 .value = CODEC_ID_MJPEG,
764 AVInputFormat ingenient_demuxer = {
770 ingenient_read_packet,
772 .flags= AVFMT_GENERIC_INDEX,
773 .extensions = "cgi", // FIXME
774 .value = CODEC_ID_MJPEG,
778 AVOutputFormat mjpeg_muxer = {
788 .flags= AVFMT_NOTIMESTAMPS,
790 #endif //CONFIG_MUXERS
792 AVInputFormat vc1_demuxer = {
796 NULL /* vc1_probe */,
798 raw_read_partial_packet,
801 .value = CODEC_ID_VC1,
806 #define PCMINPUTDEF(name, long_name, ext, codec) \
807 AVInputFormat pcm_ ## name ## _demuxer = {\
816 .flags= AVFMT_GENERIC_INDEX,\
821 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
822 AVOutputFormat pcm_ ## name ## _muxer = {\
832 .flags= AVFMT_NOTIMESTAMPS,\
836 #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
837 #define PCMDEF(name, long_name, ext, codec) \
838 PCMINPUTDEF(name, long_name, ext, codec)
839 #elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
840 #define PCMDEF(name, long_name, ext, codec) \
841 PCMOUTPUTDEF(name, long_name, ext, codec)
842 #elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
843 #define PCMDEF(name, long_name, ext, codec) \
844 PCMINPUTDEF(name, long_name, ext, codec)\
845 PCMOUTPUTDEF(name, long_name, ext, codec)
847 #define PCMDEF(name, long_name, ext, codec)
850 #ifdef WORDS_BIGENDIAN
852 #define LE_DEF(s) NULL
854 #define BE_DEF(s) NULL
859 PCMDEF(s16le, "pcm signed 16 bit little endian format",
860 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
862 PCMDEF(s16be, "pcm signed 16 bit big endian format",
863 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
865 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
866 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
868 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
869 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
871 PCMDEF(s8, "pcm signed 8 bit format",
872 "sb", CODEC_ID_PCM_S8)
874 PCMDEF(u8, "pcm unsigned 8 bit format",
875 "ub", CODEC_ID_PCM_U8)
877 PCMDEF(mulaw, "pcm mu law format",
878 "ul", CODEC_ID_PCM_MULAW)
880 PCMDEF(alaw, "pcm A law format",
881 "al", CODEC_ID_PCM_ALAW)
883 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
885 int packet_size, ret, width, height;
886 AVStream *st = s->streams[0];
888 width = st->codec->width;
889 height = st->codec->height;
891 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
895 ret= av_get_packet(s->pb, pkt, packet_size);
897 pkt->dts= pkt->pos / packet_size;
899 pkt->stream_index = 0;
900 if (ret != packet_size) {
907 AVInputFormat rawvideo_demuxer = {
913 rawvideo_read_packet,
915 .flags= AVFMT_GENERIC_INDEX,
916 .extensions = "yuv,cif,qcif,rgb",
917 .value = CODEC_ID_RAWVIDEO,
921 AVOutputFormat rawvideo_muxer = {
931 .flags= AVFMT_NOTIMESTAMPS,
933 #endif //CONFIG_MUXERS
936 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
941 AVOutputFormat null_muxer = {
947 #ifdef WORDS_BIGENDIAN
955 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
957 #endif //CONFIG_MUXERS