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);
224 static int audio_read_header(AVFormatContext *s,
225 AVFormatParameters *ap)
227 AVStream *st = av_new_stream(s, 0);
229 return AVERROR(ENOMEM);
230 st->codec->codec_type = CODEC_TYPE_AUDIO;
231 st->codec->codec_id = s->iformat->value;
232 st->need_parsing = AVSTREAM_PARSE_FULL;
233 /* the parameters will be extracted from the compressed bitstream */
237 /* mpeg1/h263 input */
238 static int video_read_header(AVFormatContext *s,
239 AVFormatParameters *ap)
243 st = av_new_stream(s, 0);
245 return AVERROR(ENOMEM);
247 st->codec->codec_type = CODEC_TYPE_VIDEO;
248 st->codec->codec_id = s->iformat->value;
249 st->need_parsing = AVSTREAM_PARSE_FULL;
251 /* for mjpeg, specify frame rate */
252 /* for mpeg4 specify it too (most mpeg4 streams do not have the fixed_vop_rate set ...)*/
253 if (ap->time_base.num) {
254 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
255 } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
256 st->codec->codec_id == CODEC_ID_MPEG4 ||
257 st->codec->codec_id == CODEC_ID_DIRAC ||
258 st->codec->codec_id == CODEC_ID_H264) {
259 av_set_pts_info(st, 64, 1, 25);
265 #define SEQ_START_CODE 0x000001b3
266 #define GOP_START_CODE 0x000001b8
267 #define PICTURE_START_CODE 0x00000100
268 #define SLICE_START_CODE 0x00000101
269 #define PACK_START_CODE 0x000001ba
270 #define VIDEO_ID 0x000001e0
271 #define AUDIO_ID 0x000001c0
273 static int mpegvideo_probe(AVProbeData *p)
276 int pic=0, seq=0, slice=0, pspack=0, pes=0;
279 for(i=0; i<p->buf_size; i++){
280 code = (code<<8) + p->buf[i];
281 if ((code & 0xffffff00) == 0x100) {
283 case SEQ_START_CODE: seq++; break;
284 case PICTURE_START_CODE: pic++; break;
285 case SLICE_START_CODE: slice++; break;
286 case PACK_START_CODE: pspack++; break;
288 if ((code & 0x1f0) == VIDEO_ID) pes++;
289 else if((code & 0x1e0) == AUDIO_ID) pes++;
292 if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
293 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
297 #define VISUAL_OBJECT_START_CODE 0x000001b5
298 #define VOP_START_CODE 0x000001b6
300 static int mpeg4video_probe(AVProbeData *probe_packet)
302 uint32_t temp_buffer= -1;
303 int VO=0, VOL=0, VOP = 0, VISO = 0, res=0;
306 for(i=0; i<probe_packet->buf_size; i++){
307 temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
308 if ((temp_buffer & 0xffffff00) != 0x100)
311 if (temp_buffer == VOP_START_CODE) VOP++;
312 else if (temp_buffer == VISUAL_OBJECT_START_CODE) VISO++;
313 else if (temp_buffer < 0x120) VO++;
314 else if (temp_buffer < 0x130) VOL++;
315 else if ( !(0x1AF < temp_buffer && temp_buffer < 0x1B7)
316 && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++;
319 if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0)
320 return AVPROBE_SCORE_MAX/2;
324 static int h263_probe(AVProbeData *p)
330 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
337 static int h261_probe(AVProbeData *p)
343 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
350 static int dirac_probe(AVProbeData *p)
352 if (AV_RL32(p->buf) == MKTAG('B', 'B', 'C', 'D'))
353 return AVPROBE_SCORE_MAX;
358 static int ac3_probe(AVProbeData *p)
360 int max_frames, first_frames = 0, frames;
361 uint8_t *buf, *buf2, *end;
367 end = buf + p->buf_size;
369 for(; buf < end; buf++) {
372 for(frames = 0; buf2 < end; frames++) {
373 init_get_bits(&gbc, buf2, 54);
374 if(ff_ac3_parse_header(&gbc, &hdr) < 0)
376 if(buf2 + hdr.frame_size > end ||
377 av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, buf2 + 2, hdr.frame_size - 2))
379 buf2 += hdr.frame_size;
381 max_frames = FFMAX(max_frames, frames);
383 first_frames = frames;
385 if (first_frames>=3) return AVPROBE_SCORE_MAX * 3 / 4;
386 else if(max_frames>=3) return AVPROBE_SCORE_MAX / 2;
387 else if(max_frames>=1) return 1;
391 static int flac_probe(AVProbeData *p)
393 if(memcmp(p->buf, "fLaC", 4)) return 0;
394 else return AVPROBE_SCORE_MAX / 2;
397 AVInputFormat shorten_demuxer = {
403 raw_read_partial_packet,
405 .flags= AVFMT_GENERIC_INDEX,
407 .value = CODEC_ID_SHORTEN,
410 AVInputFormat flac_demuxer = {
416 raw_read_partial_packet,
418 .flags= AVFMT_GENERIC_INDEX,
419 .extensions = "flac",
420 .value = CODEC_ID_FLAC,
424 AVOutputFormat flac_muxer = {
434 .flags= AVFMT_NOTIMESTAMPS,
436 #endif //CONFIG_MUXERS
438 #ifdef CONFIG_AC3_DEMUXER
439 AVInputFormat ac3_demuxer = {
445 raw_read_partial_packet,
447 .flags= AVFMT_GENERIC_INDEX,
449 .value = CODEC_ID_AC3,
454 AVOutputFormat ac3_muxer = {
464 .flags= AVFMT_NOTIMESTAMPS,
467 AVOutputFormat dts_muxer = {
477 .flags= AVFMT_NOTIMESTAMPS,
480 #endif //CONFIG_MUXERS
482 AVInputFormat dirac_demuxer = {
488 raw_read_partial_packet,
490 .flags= AVFMT_GENERIC_INDEX,
491 .value = CODEC_ID_DIRAC,
495 AVOutputFormat dirac_muxer = {
505 .flags= AVFMT_NOTIMESTAMPS,
509 AVInputFormat dts_demuxer = {
515 raw_read_partial_packet,
517 .flags= AVFMT_GENERIC_INDEX,
519 .value = CODEC_ID_DTS,
522 AVInputFormat aac_demuxer = {
528 raw_read_partial_packet,
530 .flags= AVFMT_GENERIC_INDEX,
532 .value = CODEC_ID_AAC,
535 AVInputFormat gsm_demuxer = {
541 raw_read_partial_packet,
543 .flags= AVFMT_GENERIC_INDEX,
545 .value = CODEC_ID_GSM,
548 #ifdef CONFIG_ROQ_MUXER
549 AVOutputFormat roq_muxer =
561 #endif //CONFIG_ROQ_MUXER
563 AVInputFormat h261_demuxer = {
569 raw_read_partial_packet,
571 .flags= AVFMT_GENERIC_INDEX,
572 .extensions = "h261",
573 .value = CODEC_ID_H261,
577 AVOutputFormat h261_muxer = {
587 .flags= AVFMT_NOTIMESTAMPS,
589 #endif //CONFIG_MUXERS
591 AVInputFormat h263_demuxer = {
597 raw_read_partial_packet,
599 .flags= AVFMT_GENERIC_INDEX,
600 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
601 .value = CODEC_ID_H263,
605 AVOutputFormat h263_muxer = {
615 .flags= AVFMT_NOTIMESTAMPS,
617 #endif //CONFIG_MUXERS
619 AVInputFormat m4v_demuxer = {
621 "raw MPEG4 video format",
623 mpeg4video_probe, /** probing for mpeg4 data */
625 raw_read_partial_packet,
627 .flags= AVFMT_GENERIC_INDEX,
628 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
629 .value = CODEC_ID_MPEG4,
633 AVOutputFormat m4v_muxer = {
635 "raw MPEG4 video format",
643 .flags= AVFMT_NOTIMESTAMPS,
645 #endif //CONFIG_MUXERS
647 AVInputFormat h264_demuxer = {
649 "raw H264 video format",
651 NULL /*mpegvideo_probe*/,
653 raw_read_partial_packet,
655 .flags= AVFMT_GENERIC_INDEX,
656 .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
657 .value = CODEC_ID_H264,
661 AVOutputFormat h264_muxer = {
663 "raw H264 video format",
671 .flags= AVFMT_NOTIMESTAMPS,
673 #endif //CONFIG_MUXERS
675 AVInputFormat mpegvideo_demuxer = {
681 raw_read_partial_packet,
683 .flags= AVFMT_GENERIC_INDEX,
684 .value = CODEC_ID_MPEG1VIDEO,
688 AVOutputFormat mpeg1video_muxer = {
698 .flags= AVFMT_NOTIMESTAMPS,
700 #endif //CONFIG_MUXERS
703 AVOutputFormat mpeg2video_muxer = {
713 .flags= AVFMT_NOTIMESTAMPS,
715 #endif //CONFIG_MUXERS
717 AVInputFormat mjpeg_demuxer = {
723 raw_read_partial_packet,
725 .flags= AVFMT_GENERIC_INDEX,
726 .extensions = "mjpg,mjpeg",
727 .value = CODEC_ID_MJPEG,
730 AVInputFormat ingenient_demuxer = {
736 ingenient_read_packet,
738 .flags= AVFMT_GENERIC_INDEX,
739 .extensions = "cgi", // FIXME
740 .value = CODEC_ID_MJPEG,
744 AVOutputFormat mjpeg_muxer = {
754 .flags= AVFMT_NOTIMESTAMPS,
756 #endif //CONFIG_MUXERS
758 AVInputFormat vc1_demuxer = {
762 NULL /* vc1_probe */,
764 raw_read_partial_packet,
767 .value = CODEC_ID_VC1,
772 #define PCMINPUTDEF(name, long_name, ext, codec) \
773 AVInputFormat pcm_ ## name ## _demuxer = {\
782 .flags= AVFMT_GENERIC_INDEX,\
787 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
788 AVOutputFormat pcm_ ## name ## _muxer = {\
798 .flags= AVFMT_NOTIMESTAMPS,\
802 #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
803 #define PCMDEF(name, long_name, ext, codec) \
804 PCMINPUTDEF(name, long_name, ext, codec)
805 #elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
806 #define PCMDEF(name, long_name, ext, codec) \
807 PCMOUTPUTDEF(name, long_name, ext, codec)
808 #elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
809 #define PCMDEF(name, long_name, ext, codec) \
810 PCMINPUTDEF(name, long_name, ext, codec)\
811 PCMOUTPUTDEF(name, long_name, ext, codec)
813 #define PCMDEF(name, long_name, ext, codec)
816 #ifdef WORDS_BIGENDIAN
818 #define LE_DEF(s) NULL
820 #define BE_DEF(s) NULL
825 PCMDEF(s16le, "pcm signed 16 bit little endian format",
826 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
828 PCMDEF(s16be, "pcm signed 16 bit big endian format",
829 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
831 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
832 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
834 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
835 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
837 PCMDEF(s8, "pcm signed 8 bit format",
838 "sb", CODEC_ID_PCM_S8)
840 PCMDEF(u8, "pcm unsigned 8 bit format",
841 "ub", CODEC_ID_PCM_U8)
843 PCMDEF(mulaw, "pcm mu law format",
844 "ul", CODEC_ID_PCM_MULAW)
846 PCMDEF(alaw, "pcm A law format",
847 "al", CODEC_ID_PCM_ALAW)
849 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
851 int packet_size, ret, width, height;
852 AVStream *st = s->streams[0];
854 width = st->codec->width;
855 height = st->codec->height;
857 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
861 ret= av_get_packet(s->pb, pkt, packet_size);
863 pkt->dts= pkt->pos / packet_size;
865 pkt->stream_index = 0;
866 if (ret != packet_size) {
873 AVInputFormat rawvideo_demuxer = {
879 rawvideo_read_packet,
881 .flags= AVFMT_GENERIC_INDEX,
882 .extensions = "yuv,cif,qcif,rgb",
883 .value = CODEC_ID_RAWVIDEO,
887 AVOutputFormat rawvideo_muxer = {
897 .flags= AVFMT_NOTIMESTAMPS,
899 #endif //CONFIG_MUXERS
902 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
907 AVOutputFormat null_muxer = {
913 #ifdef WORDS_BIGENDIAN
921 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
923 #endif //CONFIG_MUXERS