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 = {
438 raw_read_partial_packet,
440 .flags= AVFMT_GENERIC_INDEX,
442 .value = CODEC_ID_SHORTEN,
445 AVInputFormat flac_demuxer = {
451 raw_read_partial_packet,
453 .flags= AVFMT_GENERIC_INDEX,
454 .extensions = "flac",
455 .value = CODEC_ID_FLAC,
459 AVOutputFormat flac_muxer = {
469 .flags= AVFMT_NOTIMESTAMPS,
471 #endif //CONFIG_MUXERS
473 #ifdef CONFIG_AC3_DEMUXER
474 AVInputFormat ac3_demuxer = {
480 raw_read_partial_packet,
482 .flags= AVFMT_GENERIC_INDEX,
484 .value = CODEC_ID_AC3,
489 AVOutputFormat ac3_muxer = {
499 .flags= AVFMT_NOTIMESTAMPS,
502 AVOutputFormat dts_muxer = {
512 .flags= AVFMT_NOTIMESTAMPS,
515 #endif //CONFIG_MUXERS
517 AVInputFormat dirac_demuxer = {
523 raw_read_partial_packet,
525 .flags= AVFMT_GENERIC_INDEX,
526 .value = CODEC_ID_DIRAC,
530 AVOutputFormat dirac_muxer = {
540 .flags= AVFMT_NOTIMESTAMPS,
544 AVInputFormat dts_demuxer = {
550 raw_read_partial_packet,
552 .flags= AVFMT_GENERIC_INDEX,
554 .value = CODEC_ID_DTS,
557 AVInputFormat aac_demuxer = {
563 raw_read_partial_packet,
565 .flags= AVFMT_GENERIC_INDEX,
567 .value = CODEC_ID_AAC,
570 AVInputFormat gsm_demuxer = {
576 raw_read_partial_packet,
578 .flags= AVFMT_GENERIC_INDEX,
580 .value = CODEC_ID_GSM,
583 #ifdef CONFIG_ROQ_MUXER
584 AVOutputFormat roq_muxer =
596 #endif //CONFIG_ROQ_MUXER
598 AVInputFormat h261_demuxer = {
604 raw_read_partial_packet,
606 .flags= AVFMT_GENERIC_INDEX,
607 .extensions = "h261",
608 .value = CODEC_ID_H261,
612 AVOutputFormat h261_muxer = {
622 .flags= AVFMT_NOTIMESTAMPS,
624 #endif //CONFIG_MUXERS
626 AVInputFormat h263_demuxer = {
632 raw_read_partial_packet,
634 .flags= AVFMT_GENERIC_INDEX,
635 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
636 .value = CODEC_ID_H263,
640 AVOutputFormat h263_muxer = {
650 .flags= AVFMT_NOTIMESTAMPS,
652 #endif //CONFIG_MUXERS
654 AVInputFormat m4v_demuxer = {
656 "raw MPEG4 video format",
658 mpeg4video_probe, /** probing for mpeg4 data */
660 raw_read_partial_packet,
662 .flags= AVFMT_GENERIC_INDEX,
663 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
664 .value = CODEC_ID_MPEG4,
668 AVOutputFormat m4v_muxer = {
670 "raw MPEG4 video format",
678 .flags= AVFMT_NOTIMESTAMPS,
680 #endif //CONFIG_MUXERS
682 AVInputFormat h264_demuxer = {
684 "raw H264 video format",
686 NULL /*mpegvideo_probe*/,
688 raw_read_partial_packet,
690 .flags= AVFMT_GENERIC_INDEX,
691 .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
692 .value = CODEC_ID_H264,
696 AVOutputFormat h264_muxer = {
698 "raw H264 video format",
706 .flags= AVFMT_NOTIMESTAMPS,
708 #endif //CONFIG_MUXERS
710 AVInputFormat mpegvideo_demuxer = {
716 raw_read_partial_packet,
718 .flags= AVFMT_GENERIC_INDEX,
719 .value = CODEC_ID_MPEG1VIDEO,
723 AVOutputFormat mpeg1video_muxer = {
733 .flags= AVFMT_NOTIMESTAMPS,
735 #endif //CONFIG_MUXERS
738 AVOutputFormat mpeg2video_muxer = {
748 .flags= AVFMT_NOTIMESTAMPS,
750 #endif //CONFIG_MUXERS
752 AVInputFormat mjpeg_demuxer = {
758 raw_read_partial_packet,
760 .flags= AVFMT_GENERIC_INDEX,
761 .extensions = "mjpg,mjpeg",
762 .value = CODEC_ID_MJPEG,
765 AVInputFormat ingenient_demuxer = {
771 ingenient_read_packet,
773 .flags= AVFMT_GENERIC_INDEX,
774 .extensions = "cgi", // FIXME
775 .value = CODEC_ID_MJPEG,
779 AVOutputFormat mjpeg_muxer = {
789 .flags= AVFMT_NOTIMESTAMPS,
791 #endif //CONFIG_MUXERS
793 AVInputFormat vc1_demuxer = {
797 NULL /* vc1_probe */,
799 raw_read_partial_packet,
802 .value = CODEC_ID_VC1,
807 #define PCMINPUTDEF(name, long_name, ext, codec) \
808 AVInputFormat pcm_ ## name ## _demuxer = {\
817 .flags= AVFMT_GENERIC_INDEX,\
822 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
823 AVOutputFormat pcm_ ## name ## _muxer = {\
833 .flags= AVFMT_NOTIMESTAMPS,\
837 #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
838 #define PCMDEF(name, long_name, ext, codec) \
839 PCMINPUTDEF(name, long_name, ext, codec)
840 #elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
841 #define PCMDEF(name, long_name, ext, codec) \
842 PCMOUTPUTDEF(name, long_name, ext, codec)
843 #elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
844 #define PCMDEF(name, long_name, ext, codec) \
845 PCMINPUTDEF(name, long_name, ext, codec)\
846 PCMOUTPUTDEF(name, long_name, ext, codec)
848 #define PCMDEF(name, long_name, ext, codec)
851 #ifdef WORDS_BIGENDIAN
853 #define LE_DEF(s) NULL
855 #define BE_DEF(s) NULL
860 PCMDEF(s16le, "pcm signed 16 bit little endian format",
861 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
863 PCMDEF(s16be, "pcm signed 16 bit big endian format",
864 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
866 PCMDEF(u16le, "pcm unsigned 16 bit little endian format",
867 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
869 PCMDEF(u16be, "pcm unsigned 16 bit big endian format",
870 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
872 PCMDEF(s8, "pcm signed 8 bit format",
873 "sb", CODEC_ID_PCM_S8)
875 PCMDEF(u8, "pcm unsigned 8 bit format",
876 "ub", CODEC_ID_PCM_U8)
878 PCMDEF(mulaw, "pcm mu law format",
879 "ul", CODEC_ID_PCM_MULAW)
881 PCMDEF(alaw, "pcm A law format",
882 "al", CODEC_ID_PCM_ALAW)
884 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
886 int packet_size, ret, width, height;
887 AVStream *st = s->streams[0];
889 width = st->codec->width;
890 height = st->codec->height;
892 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
896 ret= av_get_packet(s->pb, pkt, packet_size);
898 pkt->dts= pkt->pos / packet_size;
900 pkt->stream_index = 0;
901 if (ret != packet_size) {
908 AVInputFormat rawvideo_demuxer = {
914 rawvideo_read_packet,
916 .flags= AVFMT_GENERIC_INDEX,
917 .extensions = "yuv,cif,qcif,rgb",
918 .value = CODEC_ID_RAWVIDEO,
922 AVOutputFormat rawvideo_muxer = {
932 .flags= AVFMT_NOTIMESTAMPS,
934 #endif //CONFIG_MUXERS
937 static int null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
942 AVOutputFormat null_muxer = {
948 #ifdef WORDS_BIGENDIAN
956 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
958 #endif //CONFIG_MUXERS