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 null_write_packet(struct AVFormatContext *s, AVPacket *pkt)
64 static int raw_write_packet(struct AVFormatContext *s, AVPacket *pkt)
66 put_buffer(s->pb, pkt->data, pkt->size);
67 put_flush_packet(s->pb);
70 #endif //CONFIG_MUXERS
73 static int raw_read_header(AVFormatContext *s, AVFormatParameters *ap)
78 st = av_new_stream(s, 0);
80 return AVERROR(ENOMEM);
82 id = s->iformat->value;
83 if (id == CODEC_ID_RAWVIDEO) {
84 st->codec->codec_type = CODEC_TYPE_VIDEO;
86 st->codec->codec_type = CODEC_TYPE_AUDIO;
88 st->codec->codec_id = id;
90 switch(st->codec->codec_type) {
91 case CODEC_TYPE_AUDIO:
92 st->codec->sample_rate = ap->sample_rate;
93 st->codec->channels = ap->channels;
94 av_set_pts_info(st, 64, 1, st->codec->sample_rate);
96 case CODEC_TYPE_VIDEO:
98 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
100 av_set_pts_info(st, 64, 1, 25);
101 st->codec->width = ap->width;
102 st->codec->height = ap->height;
103 st->codec->pix_fmt = ap->pix_fmt;
104 if(st->codec->pix_fmt == PIX_FMT_NONE)
105 st->codec->pix_fmt= PIX_FMT_YUV420P;
113 #define RAW_PACKET_SIZE 1024
115 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
118 // AVStream *st = s->streams[0];
120 size= RAW_PACKET_SIZE;
122 ret= av_get_packet(s->pb, pkt, size);
124 pkt->stream_index = 0;
128 /* note: we need to modify the packet size here to handle the last
132 bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
133 assert(bps); // if false there IS a bug elsewhere (NOT in this function)
135 pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);
140 static int raw_read_partial_packet(AVFormatContext *s, AVPacket *pkt)
144 size = RAW_PACKET_SIZE;
146 if (av_new_packet(pkt, size) < 0)
149 pkt->pos= url_ftell(s->pb);
150 pkt->stream_index = 0;
151 ret = get_partial_buffer(s->pb, pkt->data, size);
160 static int rawvideo_read_packet(AVFormatContext *s, AVPacket *pkt)
162 int packet_size, ret, width, height;
163 AVStream *st = s->streams[0];
165 width = st->codec->width;
166 height = st->codec->height;
168 packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
172 ret= av_get_packet(s->pb, pkt, packet_size);
174 pkt->dts= pkt->pos / packet_size;
176 pkt->stream_index = 0;
177 if (ret != packet_size) {
184 // http://www.artificis.hu/files/texts/ingenient.txt
185 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
187 int ret, size, w, h, unk1, unk2;
189 if (get_le32(s->pb) != MKTAG('M', 'J', 'P', 'G'))
190 return AVERROR(EIO); // FIXME
192 size = get_le32(s->pb);
197 url_fskip(s->pb, 8); // zero + size (padded?)
199 unk1 = get_le16(s->pb);
200 unk2 = get_le16(s->pb);
201 url_fskip(s->pb, 22); // ascii timestamp
203 av_log(NULL, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
204 size, w, h, unk1, unk2);
206 if (av_new_packet(pkt, size) < 0)
209 pkt->pos = url_ftell(s->pb);
210 pkt->stream_index = 0;
211 ret = get_buffer(s->pb, pkt->data, size);
220 int pcm_read_seek(AVFormatContext *s,
221 int stream_index, int64_t timestamp, int flags)
224 int block_align, byte_rate, ret;
229 block_align = st->codec->block_align ? st->codec->block_align :
230 (av_get_bits_per_sample(st->codec->codec_id) * st->codec->channels) >> 3;
231 byte_rate = st->codec->bit_rate ? st->codec->bit_rate >> 3 :
232 block_align * st->codec->sample_rate;
234 if (block_align <= 0 || byte_rate <= 0)
237 /* compute the position by aligning it to block_align */
238 pos = av_rescale_rnd(timestamp * byte_rate,
240 st->time_base.den * (int64_t)block_align,
241 (flags & AVSEEK_FLAG_BACKWARD) ? AV_ROUND_DOWN : AV_ROUND_UP);
244 /* recompute exact position */
245 st->cur_dts = av_rescale(pos, st->time_base.den, byte_rate * (int64_t)st->time_base.num);
246 if ((ret = url_fseek(s->pb, pos + s->data_offset, SEEK_SET)) < 0)
251 static int audio_read_header(AVFormatContext *s,
252 AVFormatParameters *ap)
254 AVStream *st = av_new_stream(s, 0);
256 return AVERROR(ENOMEM);
257 st->codec->codec_type = CODEC_TYPE_AUDIO;
258 st->codec->codec_id = s->iformat->value;
259 st->need_parsing = AVSTREAM_PARSE_FULL;
260 /* the parameters will be extracted from the compressed bitstream */
264 /* mpeg1/h263 input */
265 static int video_read_header(AVFormatContext *s,
266 AVFormatParameters *ap)
270 st = av_new_stream(s, 0);
272 return AVERROR(ENOMEM);
274 st->codec->codec_type = CODEC_TYPE_VIDEO;
275 st->codec->codec_id = s->iformat->value;
276 st->need_parsing = AVSTREAM_PARSE_FULL;
278 /* for mjpeg, specify frame rate */
279 /* for mpeg4 specify it too (most mpeg4 streams do not have the fixed_vop_rate set ...)*/
280 if (ap->time_base.num) {
281 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
282 } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
283 st->codec->codec_id == CODEC_ID_MPEG4 ||
284 st->codec->codec_id == CODEC_ID_DIRAC ||
285 st->codec->codec_id == CODEC_ID_H264) {
286 av_set_pts_info(st, 64, 1, 25);
292 #define SEQ_START_CODE 0x000001b3
293 #define GOP_START_CODE 0x000001b8
294 #define PICTURE_START_CODE 0x00000100
295 #define SLICE_START_CODE 0x00000101
296 #define PACK_START_CODE 0x000001ba
297 #define VIDEO_ID 0x000001e0
298 #define AUDIO_ID 0x000001c0
300 static int mpegvideo_probe(AVProbeData *p)
303 int pic=0, seq=0, slice=0, pspack=0, pes=0;
306 for(i=0; i<p->buf_size; i++){
307 code = (code<<8) + p->buf[i];
308 if ((code & 0xffffff00) == 0x100) {
310 case SEQ_START_CODE: seq++; break;
311 case PICTURE_START_CODE: pic++; break;
312 case SLICE_START_CODE: slice++; break;
313 case PACK_START_CODE: pspack++; break;
315 if ((code & 0x1f0) == VIDEO_ID) pes++;
316 else if((code & 0x1e0) == AUDIO_ID) pes++;
319 if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
320 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
324 #define VISUAL_OBJECT_START_CODE 0x000001b5
325 #define VOP_START_CODE 0x000001b6
327 static int mpeg4video_probe(AVProbeData *probe_packet)
329 uint32_t temp_buffer= -1;
330 int VO=0, VOL=0, VOP = 0, VISO = 0, res=0;
333 for(i=0; i<probe_packet->buf_size; i++){
334 temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
335 if ((temp_buffer & 0xffffff00) != 0x100)
338 if (temp_buffer == VOP_START_CODE) VOP++;
339 else if (temp_buffer == VISUAL_OBJECT_START_CODE) VISO++;
340 else if (temp_buffer < 0x120) VO++;
341 else if (temp_buffer < 0x130) VOL++;
342 else if ( !(0x1AF < temp_buffer && temp_buffer < 0x1B7)
343 && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++;
346 if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0)
347 return AVPROBE_SCORE_MAX/2;
351 static int h264_probe(AVProbeData *p)
354 int sps=0, pps=0, idr=0, res=0, sli=0;
357 for(i=0; i<p->buf_size; i++){
358 code = (code<<8) + p->buf[i];
359 if ((code & 0xffffff00) == 0x100) {
360 int ref_idc= (code>>5)&3;
361 int type = code & 0x1F;
362 static const int8_t ref_zero[32]={
363 2, 0, 0, 0, 0,-1, 1,-1,
364 -1, 1, 1, 1, 1,-1, 2, 2,
365 2, 2, 2, 0, 2, 2, 2, 2,
366 2, 2, 2, 2, 2, 2, 2, 2
369 if(code & 0x80) //forbidden bit
372 if(ref_zero[type] == 1 && ref_idc)
374 if(ref_zero[type] ==-1 && !ref_idc)
376 if(ref_zero[type] == 2)
380 case 1: sli++; break;
381 case 5: idr++; break;
387 case 8: pps++; break;
391 if(sps && pps && (idr||sli>3) && res<(sps+pps+idr))
392 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
396 static int h263_probe(AVProbeData *p)
402 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
409 static int h261_probe(AVProbeData *p)
415 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
422 #define DCA_MARKER_14B_BE 0x1FFFE800
423 #define DCA_MARKER_14B_LE 0xFF1F00E8
424 #define DCA_MARKER_RAW_BE 0x7FFE8001
425 #define DCA_MARKER_RAW_LE 0xFE7F0180
426 static int dts_probe(AVProbeData *p)
428 const uint8_t *buf, *bufp;
433 for(; buf < (p->buf+p->buf_size)-2; buf+=2) {
435 state = (state << 16) | bytestream_get_be16(&bufp);
437 /* Regular bitstream */
438 if (state == DCA_MARKER_RAW_BE || state == DCA_MARKER_RAW_LE)
439 return AVPROBE_SCORE_MAX/2+1;
441 /* 14 bits big endian bitstream */
442 if (state == DCA_MARKER_14B_BE)
443 if ((bytestream_get_be16(&bufp) & 0xFFF0) == 0x07F0)
444 return AVPROBE_SCORE_MAX/2+1;
446 /* 14 bits little endian bitstream */
447 if (state == DCA_MARKER_14B_LE)
448 if ((bytestream_get_be16(&bufp) & 0xF0FF) == 0xF007)
449 return AVPROBE_SCORE_MAX/2+1;
455 static int dirac_probe(AVProbeData *p)
457 if (AV_RL32(p->buf) == MKTAG('B', 'B', 'C', 'D'))
458 return AVPROBE_SCORE_MAX;
463 static int ac3_probe(AVProbeData *p)
465 int max_frames, first_frames = 0, frames;
466 uint8_t *buf, *buf2, *end;
472 end = buf + p->buf_size;
474 for(; buf < end; buf++) {
477 for(frames = 0; buf2 < end; frames++) {
478 init_get_bits(&gbc, buf2, 54);
479 if(ff_ac3_parse_header(&gbc, &hdr) < 0)
481 if(buf2 + hdr.frame_size > end ||
482 av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, buf2 + 2, hdr.frame_size - 2))
484 buf2 += hdr.frame_size;
486 max_frames = FFMAX(max_frames, frames);
488 first_frames = frames;
490 if (first_frames>=3) return AVPROBE_SCORE_MAX * 3 / 4;
491 else if(max_frames>=3) return AVPROBE_SCORE_MAX / 2;
492 else if(max_frames>=1) return 1;
496 static int flac_probe(AVProbeData *p)
498 if(memcmp(p->buf, "fLaC", 4)) return 0;
499 else return AVPROBE_SCORE_MAX / 2;
503 /* Note: Do not forget to add new entries to the Makefile as well. */
505 AVInputFormat aac_demuxer = {
507 NULL_IF_CONFIG_SMALL("ADTS AAC"),
511 raw_read_partial_packet,
512 .flags= AVFMT_GENERIC_INDEX,
514 .value = CODEC_ID_AAC,
517 #ifdef CONFIG_AC3_DEMUXER
518 AVInputFormat ac3_demuxer = {
520 NULL_IF_CONFIG_SMALL("raw AC-3"),
524 raw_read_partial_packet,
525 .flags= AVFMT_GENERIC_INDEX,
527 .value = CODEC_ID_AC3,
532 AVOutputFormat ac3_muxer = {
534 NULL_IF_CONFIG_SMALL("raw AC-3"),
542 .flags= AVFMT_NOTIMESTAMPS,
544 #endif //CONFIG_MUXERS
546 AVInputFormat dirac_demuxer = {
548 NULL_IF_CONFIG_SMALL("raw Dirac"),
552 raw_read_partial_packet,
553 .flags= AVFMT_GENERIC_INDEX,
554 .value = CODEC_ID_DIRAC,
558 AVOutputFormat dirac_muxer = {
560 NULL_IF_CONFIG_SMALL("raw Dirac"),
568 .flags= AVFMT_NOTIMESTAMPS,
572 AVInputFormat dts_demuxer = {
574 NULL_IF_CONFIG_SMALL("raw DTS"),
578 raw_read_partial_packet,
579 .flags= AVFMT_GENERIC_INDEX,
581 .value = CODEC_ID_DTS,
585 AVOutputFormat dts_muxer = {
587 NULL_IF_CONFIG_SMALL("raw DTS"),
595 .flags= AVFMT_NOTIMESTAMPS,
599 AVInputFormat flac_demuxer = {
601 NULL_IF_CONFIG_SMALL("raw FLAC"),
605 raw_read_partial_packet,
606 .flags= AVFMT_GENERIC_INDEX,
607 .extensions = "flac",
608 .value = CODEC_ID_FLAC,
612 AVOutputFormat flac_muxer = {
614 NULL_IF_CONFIG_SMALL("raw FLAC"),
622 .flags= AVFMT_NOTIMESTAMPS,
624 #endif //CONFIG_MUXERS
626 AVInputFormat gsm_demuxer = {
628 NULL_IF_CONFIG_SMALL("GSM"),
632 raw_read_partial_packet,
633 .flags= AVFMT_GENERIC_INDEX,
635 .value = CODEC_ID_GSM,
638 AVInputFormat h261_demuxer = {
640 NULL_IF_CONFIG_SMALL("raw H.261"),
644 raw_read_partial_packet,
645 .flags= AVFMT_GENERIC_INDEX,
646 .extensions = "h261",
647 .value = CODEC_ID_H261,
651 AVOutputFormat h261_muxer = {
653 NULL_IF_CONFIG_SMALL("raw H.261"),
661 .flags= AVFMT_NOTIMESTAMPS,
663 #endif //CONFIG_MUXERS
665 AVInputFormat h263_demuxer = {
667 NULL_IF_CONFIG_SMALL("raw H.263"),
671 raw_read_partial_packet,
672 .flags= AVFMT_GENERIC_INDEX,
673 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
674 .value = CODEC_ID_H263,
678 AVOutputFormat h263_muxer = {
680 NULL_IF_CONFIG_SMALL("raw H.263"),
688 .flags= AVFMT_NOTIMESTAMPS,
690 #endif //CONFIG_MUXERS
692 AVInputFormat h264_demuxer = {
694 NULL_IF_CONFIG_SMALL("raw H.264 video format"),
698 raw_read_partial_packet,
699 .flags= AVFMT_GENERIC_INDEX,
700 .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
701 .value = CODEC_ID_H264,
705 AVOutputFormat h264_muxer = {
707 NULL_IF_CONFIG_SMALL("raw H.264 video format"),
715 .flags= AVFMT_NOTIMESTAMPS,
717 #endif //CONFIG_MUXERS
719 AVInputFormat ingenient_demuxer = {
721 NULL_IF_CONFIG_SMALL("Ingenient MJPEG"),
725 ingenient_read_packet,
726 .flags= AVFMT_GENERIC_INDEX,
727 .extensions = "cgi", // FIXME
728 .value = CODEC_ID_MJPEG,
731 AVInputFormat m4v_demuxer = {
733 NULL_IF_CONFIG_SMALL("raw MPEG-4 video format"),
735 mpeg4video_probe, /** probing for mpeg4 data */
737 raw_read_partial_packet,
738 .flags= AVFMT_GENERIC_INDEX,
739 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
740 .value = CODEC_ID_MPEG4,
744 AVOutputFormat m4v_muxer = {
746 NULL_IF_CONFIG_SMALL("raw MPEG-4 video format"),
754 .flags= AVFMT_NOTIMESTAMPS,
756 #endif //CONFIG_MUXERS
758 AVInputFormat mjpeg_demuxer = {
760 NULL_IF_CONFIG_SMALL("MJPEG video"),
764 raw_read_partial_packet,
765 .flags= AVFMT_GENERIC_INDEX,
766 .extensions = "mjpg,mjpeg",
767 .value = CODEC_ID_MJPEG,
771 AVOutputFormat mjpeg_muxer = {
773 NULL_IF_CONFIG_SMALL("MJPEG video"),
781 .flags= AVFMT_NOTIMESTAMPS,
783 #endif //CONFIG_MUXERS
785 AVInputFormat mlp_demuxer = {
787 NULL_IF_CONFIG_SMALL("raw MLP"),
791 raw_read_partial_packet,
792 .flags= AVFMT_GENERIC_INDEX,
794 .value = CODEC_ID_MLP,
798 AVOutputFormat mpeg1video_muxer = {
800 NULL_IF_CONFIG_SMALL("MPEG video"),
808 .flags= AVFMT_NOTIMESTAMPS,
810 #endif //CONFIG_MUXERS
813 AVOutputFormat mpeg2video_muxer = {
815 NULL_IF_CONFIG_SMALL("MPEG-2 video"),
823 .flags= AVFMT_NOTIMESTAMPS,
825 #endif //CONFIG_MUXERS
827 AVInputFormat mpegvideo_demuxer = {
829 NULL_IF_CONFIG_SMALL("MPEG video"),
833 raw_read_partial_packet,
834 .flags= AVFMT_GENERIC_INDEX,
835 .value = CODEC_ID_MPEG1VIDEO,
839 AVOutputFormat null_muxer = {
841 NULL_IF_CONFIG_SMALL("null video format"),
845 #ifdef WORDS_BIGENDIAN
853 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
855 #endif //CONFIG_MUXERS
857 AVInputFormat rawvideo_demuxer = {
859 NULL_IF_CONFIG_SMALL("raw video format"),
863 rawvideo_read_packet,
864 .flags= AVFMT_GENERIC_INDEX,
865 .extensions = "yuv,cif,qcif,rgb",
866 .value = CODEC_ID_RAWVIDEO,
870 AVOutputFormat rawvideo_muxer = {
872 NULL_IF_CONFIG_SMALL("raw video format"),
880 .flags= AVFMT_NOTIMESTAMPS,
882 #endif //CONFIG_MUXERS
884 #ifdef CONFIG_ROQ_MUXER
885 AVOutputFormat roq_muxer =
888 NULL_IF_CONFIG_SMALL("id RoQ format"),
897 #endif //CONFIG_ROQ_MUXER
899 AVInputFormat shorten_demuxer = {
901 NULL_IF_CONFIG_SMALL("raw Shorten"),
905 raw_read_partial_packet,
906 .flags= AVFMT_GENERIC_INDEX,
908 .value = CODEC_ID_SHORTEN,
911 AVInputFormat vc1_demuxer = {
913 NULL_IF_CONFIG_SMALL("raw VC-1"),
915 NULL /* vc1_probe */,
917 raw_read_partial_packet,
919 .value = CODEC_ID_VC1,
924 #define PCMINPUTDEF(name, long_name, ext, codec) \
925 AVInputFormat pcm_ ## name ## _demuxer = {\
927 NULL_IF_CONFIG_SMALL(long_name),\
934 .flags= AVFMT_GENERIC_INDEX,\
939 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
940 AVOutputFormat pcm_ ## name ## _muxer = {\
942 NULL_IF_CONFIG_SMALL(long_name),\
950 .flags= AVFMT_NOTIMESTAMPS,\
954 #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
955 #define PCMDEF(name, long_name, ext, codec) \
956 PCMINPUTDEF(name, long_name, ext, codec)
957 #elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
958 #define PCMDEF(name, long_name, ext, codec) \
959 PCMOUTPUTDEF(name, long_name, ext, codec)
960 #elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
961 #define PCMDEF(name, long_name, ext, codec) \
962 PCMINPUTDEF(name, long_name, ext, codec)\
963 PCMOUTPUTDEF(name, long_name, ext, codec)
965 #define PCMDEF(name, long_name, ext, codec)
968 #ifdef WORDS_BIGENDIAN
970 #define LE_DEF(s) NULL
972 #define BE_DEF(s) NULL
977 PCMDEF(s16be, "PCM signed 16 bit big-endian format",
978 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
980 PCMDEF(s16le, "PCM signed 16 bit little-endian format",
981 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
983 PCMDEF(s8, "PCM signed 8 bit format",
984 "sb", CODEC_ID_PCM_S8)
986 PCMDEF(u16be, "PCM unsigned 16 bit big-endian format",
987 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
989 PCMDEF(u16le, "PCM unsigned 16 bit little-endian format",
990 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
992 PCMDEF(u8, "PCM unsigned 8 bit format",
993 "ub", CODEC_ID_PCM_U8)
995 PCMDEF(alaw, "PCM A-law format",
996 "al", CODEC_ID_PCM_ALAW)
998 PCMDEF(mulaw, "PCM mu-law format",
999 "ul", CODEC_ID_PCM_MULAW)