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;
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 url_fseek(s->pb, pos + s->data_offset, SEEK_SET);
250 static int audio_read_header(AVFormatContext *s,
251 AVFormatParameters *ap)
253 AVStream *st = av_new_stream(s, 0);
255 return AVERROR(ENOMEM);
256 st->codec->codec_type = CODEC_TYPE_AUDIO;
257 st->codec->codec_id = s->iformat->value;
258 st->need_parsing = AVSTREAM_PARSE_FULL;
259 /* the parameters will be extracted from the compressed bitstream */
263 /* mpeg1/h263 input */
264 static int video_read_header(AVFormatContext *s,
265 AVFormatParameters *ap)
269 st = av_new_stream(s, 0);
271 return AVERROR(ENOMEM);
273 st->codec->codec_type = CODEC_TYPE_VIDEO;
274 st->codec->codec_id = s->iformat->value;
275 st->need_parsing = AVSTREAM_PARSE_FULL;
277 /* for mjpeg, specify frame rate */
278 /* for mpeg4 specify it too (most mpeg4 streams do not have the fixed_vop_rate set ...)*/
279 if (ap->time_base.num) {
280 av_set_pts_info(st, 64, ap->time_base.num, ap->time_base.den);
281 } else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
282 st->codec->codec_id == CODEC_ID_MPEG4 ||
283 st->codec->codec_id == CODEC_ID_DIRAC ||
284 st->codec->codec_id == CODEC_ID_H264) {
285 av_set_pts_info(st, 64, 1, 25);
291 #define SEQ_START_CODE 0x000001b3
292 #define GOP_START_CODE 0x000001b8
293 #define PICTURE_START_CODE 0x00000100
294 #define SLICE_START_CODE 0x00000101
295 #define PACK_START_CODE 0x000001ba
296 #define VIDEO_ID 0x000001e0
297 #define AUDIO_ID 0x000001c0
299 static int mpegvideo_probe(AVProbeData *p)
302 int pic=0, seq=0, slice=0, pspack=0, pes=0;
305 for(i=0; i<p->buf_size; i++){
306 code = (code<<8) + p->buf[i];
307 if ((code & 0xffffff00) == 0x100) {
309 case SEQ_START_CODE: seq++; break;
310 case PICTURE_START_CODE: pic++; break;
311 case SLICE_START_CODE: slice++; break;
312 case PACK_START_CODE: pspack++; break;
314 if ((code & 0x1f0) == VIDEO_ID) pes++;
315 else if((code & 0x1e0) == AUDIO_ID) pes++;
318 if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !pes)
319 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
323 #define VISUAL_OBJECT_START_CODE 0x000001b5
324 #define VOP_START_CODE 0x000001b6
326 static int mpeg4video_probe(AVProbeData *probe_packet)
328 uint32_t temp_buffer= -1;
329 int VO=0, VOL=0, VOP = 0, VISO = 0, res=0;
332 for(i=0; i<probe_packet->buf_size; i++){
333 temp_buffer = (temp_buffer<<8) + probe_packet->buf[i];
334 if ((temp_buffer & 0xffffff00) != 0x100)
337 if (temp_buffer == VOP_START_CODE) VOP++;
338 else if (temp_buffer == VISUAL_OBJECT_START_CODE) VISO++;
339 else if (temp_buffer < 0x120) VO++;
340 else if (temp_buffer < 0x130) VOL++;
341 else if ( !(0x1AF < temp_buffer && temp_buffer < 0x1B7)
342 && !(0x1B9 < temp_buffer && temp_buffer < 0x1C4)) res++;
345 if ( VOP >= VISO && VOP >= VOL && VO >= VOL && VOL > 0 && res==0)
346 return AVPROBE_SCORE_MAX/2;
350 static int h264_probe(AVProbeData *p)
353 int sps=0, pps=0, idr=0, res=0;
356 for(i=0; i<p->buf_size; i++){
357 code = (code<<8) + p->buf[i];
358 if ((code & 0xffffff00) == 0x100) {
359 int ref_idc= (code>>5)&3;
360 int type = code & 0x1F;
361 static const int8_t ref_zero[32]={
362 2, 0, 0, 0, 0,-1, 1,-1,
363 -1, 1, 1, 1, 1,-1, 2, 2,
364 2, 2, 2, 0, 2, 2, 2, 2,
365 2, 2, 2, 2, 2, 2, 2, 2
368 if(code & 0x80) //forbidden bit
371 if(ref_zero[type] == 1 && ref_idc)
373 if(ref_zero[type] ==-1 && !ref_idc)
375 if(ref_zero[type] == 2)
379 case 5: idr++; break;
385 case 8: pps++; break;
389 if(sps && pps && idr && res<(sps+pps+idr))
390 return AVPROBE_SCORE_MAX/2+1; // +1 for .mpg
394 static int h263_probe(AVProbeData *p)
400 code = (d[0] << 14) | (d[1] << 6) | (d[2] >> 2);
407 static int h261_probe(AVProbeData *p)
413 code = (d[0] << 12) | (d[1] << 4) | (d[2] >> 4);
420 #define DCA_MARKER_14B_BE 0x1FFFE800
421 #define DCA_MARKER_14B_LE 0xFF1F00E8
422 #define DCA_MARKER_RAW_BE 0x7FFE8001
423 #define DCA_MARKER_RAW_LE 0xFE7F0180
424 static int dts_probe(AVProbeData *p)
426 const uint8_t *buf, *bufp;
431 for(; buf < (p->buf+p->buf_size)-2; buf+=2) {
433 state = (state << 16) | bytestream_get_be16(&bufp);
435 /* Regular bitstream */
436 if (state == DCA_MARKER_RAW_BE || state == DCA_MARKER_RAW_LE)
437 return AVPROBE_SCORE_MAX/2+1;
439 /* 14 bits big endian bitstream */
440 if (state == DCA_MARKER_14B_BE)
441 if ((bytestream_get_be16(&bufp) & 0xFFF0) == 0x07F0)
442 return AVPROBE_SCORE_MAX/2+1;
444 /* 14 bits little endian bitstream */
445 if (state == DCA_MARKER_14B_LE)
446 if ((bytestream_get_be16(&bufp) & 0xF0FF) == 0xF007)
447 return AVPROBE_SCORE_MAX/2+1;
453 static int dirac_probe(AVProbeData *p)
455 if (AV_RL32(p->buf) == MKTAG('B', 'B', 'C', 'D'))
456 return AVPROBE_SCORE_MAX;
461 static int ac3_probe(AVProbeData *p)
463 int max_frames, first_frames = 0, frames;
464 uint8_t *buf, *buf2, *end;
470 end = buf + p->buf_size;
472 for(; buf < end; buf++) {
475 for(frames = 0; buf2 < end; frames++) {
476 init_get_bits(&gbc, buf2, 54);
477 if(ff_ac3_parse_header(&gbc, &hdr) < 0)
479 if(buf2 + hdr.frame_size > end ||
480 av_crc(av_crc_get_table(AV_CRC_16_ANSI), 0, buf2 + 2, hdr.frame_size - 2))
482 buf2 += hdr.frame_size;
484 max_frames = FFMAX(max_frames, frames);
486 first_frames = frames;
488 if (first_frames>=3) return AVPROBE_SCORE_MAX * 3 / 4;
489 else if(max_frames>=3) return AVPROBE_SCORE_MAX / 2;
490 else if(max_frames>=1) return 1;
494 static int flac_probe(AVProbeData *p)
496 if(memcmp(p->buf, "fLaC", 4)) return 0;
497 else return AVPROBE_SCORE_MAX / 2;
501 /* Note: Do not forget to add new entries to the Makefile as well. */
503 AVInputFormat aac_demuxer = {
505 NULL_IF_CONFIG_SMALL("ADTS AAC"),
509 raw_read_partial_packet,
510 .flags= AVFMT_GENERIC_INDEX,
512 .value = CODEC_ID_AAC,
515 #ifdef CONFIG_AC3_DEMUXER
516 AVInputFormat ac3_demuxer = {
518 NULL_IF_CONFIG_SMALL("raw AC-3"),
522 raw_read_partial_packet,
523 .flags= AVFMT_GENERIC_INDEX,
525 .value = CODEC_ID_AC3,
530 AVOutputFormat ac3_muxer = {
532 NULL_IF_CONFIG_SMALL("raw AC-3"),
540 .flags= AVFMT_NOTIMESTAMPS,
542 #endif //CONFIG_MUXERS
544 AVInputFormat dirac_demuxer = {
546 NULL_IF_CONFIG_SMALL("raw Dirac"),
550 raw_read_partial_packet,
551 .flags= AVFMT_GENERIC_INDEX,
552 .value = CODEC_ID_DIRAC,
556 AVOutputFormat dirac_muxer = {
558 NULL_IF_CONFIG_SMALL("raw Dirac"),
566 .flags= AVFMT_NOTIMESTAMPS,
570 AVInputFormat dts_demuxer = {
572 NULL_IF_CONFIG_SMALL("raw DTS"),
576 raw_read_partial_packet,
577 .flags= AVFMT_GENERIC_INDEX,
579 .value = CODEC_ID_DTS,
583 AVOutputFormat dts_muxer = {
585 NULL_IF_CONFIG_SMALL("raw DTS"),
593 .flags= AVFMT_NOTIMESTAMPS,
597 AVInputFormat flac_demuxer = {
599 NULL_IF_CONFIG_SMALL("raw FLAC"),
603 raw_read_partial_packet,
604 .flags= AVFMT_GENERIC_INDEX,
605 .extensions = "flac",
606 .value = CODEC_ID_FLAC,
610 AVOutputFormat flac_muxer = {
612 NULL_IF_CONFIG_SMALL("raw FLAC"),
620 .flags= AVFMT_NOTIMESTAMPS,
622 #endif //CONFIG_MUXERS
624 AVInputFormat gsm_demuxer = {
626 NULL_IF_CONFIG_SMALL("GSM"),
630 raw_read_partial_packet,
631 .flags= AVFMT_GENERIC_INDEX,
633 .value = CODEC_ID_GSM,
636 AVInputFormat h261_demuxer = {
638 NULL_IF_CONFIG_SMALL("raw H.261"),
642 raw_read_partial_packet,
643 .flags= AVFMT_GENERIC_INDEX,
644 .extensions = "h261",
645 .value = CODEC_ID_H261,
649 AVOutputFormat h261_muxer = {
651 NULL_IF_CONFIG_SMALL("raw H.261"),
659 .flags= AVFMT_NOTIMESTAMPS,
661 #endif //CONFIG_MUXERS
663 AVInputFormat h263_demuxer = {
665 NULL_IF_CONFIG_SMALL("raw H.263"),
669 raw_read_partial_packet,
670 .flags= AVFMT_GENERIC_INDEX,
671 // .extensions = "h263", //FIXME remove after writing mpeg4_probe
672 .value = CODEC_ID_H263,
676 AVOutputFormat h263_muxer = {
678 NULL_IF_CONFIG_SMALL("raw H.263"),
686 .flags= AVFMT_NOTIMESTAMPS,
688 #endif //CONFIG_MUXERS
690 AVInputFormat h264_demuxer = {
692 NULL_IF_CONFIG_SMALL("raw H.264 video format"),
696 raw_read_partial_packet,
697 .flags= AVFMT_GENERIC_INDEX,
698 .extensions = "h26l,h264,264", //FIXME remove after writing mpeg4_probe
699 .value = CODEC_ID_H264,
703 AVOutputFormat h264_muxer = {
705 NULL_IF_CONFIG_SMALL("raw H.264 video format"),
713 .flags= AVFMT_NOTIMESTAMPS,
715 #endif //CONFIG_MUXERS
717 AVInputFormat ingenient_demuxer = {
719 NULL_IF_CONFIG_SMALL("Ingenient MJPEG"),
723 ingenient_read_packet,
724 .flags= AVFMT_GENERIC_INDEX,
725 .extensions = "cgi", // FIXME
726 .value = CODEC_ID_MJPEG,
729 AVInputFormat m4v_demuxer = {
731 NULL_IF_CONFIG_SMALL("raw MPEG-4 video format"),
733 mpeg4video_probe, /** probing for mpeg4 data */
735 raw_read_partial_packet,
736 .flags= AVFMT_GENERIC_INDEX,
737 .extensions = "m4v", //FIXME remove after writing mpeg4_probe
738 .value = CODEC_ID_MPEG4,
742 AVOutputFormat m4v_muxer = {
744 NULL_IF_CONFIG_SMALL("raw MPEG-4 video format"),
752 .flags= AVFMT_NOTIMESTAMPS,
754 #endif //CONFIG_MUXERS
756 AVInputFormat mjpeg_demuxer = {
758 NULL_IF_CONFIG_SMALL("MJPEG video"),
762 raw_read_partial_packet,
763 .flags= AVFMT_GENERIC_INDEX,
764 .extensions = "mjpg,mjpeg",
765 .value = CODEC_ID_MJPEG,
769 AVOutputFormat mjpeg_muxer = {
771 NULL_IF_CONFIG_SMALL("MJPEG video"),
779 .flags= AVFMT_NOTIMESTAMPS,
781 #endif //CONFIG_MUXERS
783 AVInputFormat mlp_demuxer = {
785 NULL_IF_CONFIG_SMALL("raw MLP"),
789 raw_read_partial_packet,
790 .flags= AVFMT_GENERIC_INDEX,
792 .value = CODEC_ID_MLP,
796 AVOutputFormat mpeg1video_muxer = {
798 NULL_IF_CONFIG_SMALL("MPEG video"),
806 .flags= AVFMT_NOTIMESTAMPS,
808 #endif //CONFIG_MUXERS
811 AVOutputFormat mpeg2video_muxer = {
813 NULL_IF_CONFIG_SMALL("MPEG-2 video"),
821 .flags= AVFMT_NOTIMESTAMPS,
823 #endif //CONFIG_MUXERS
825 AVInputFormat mpegvideo_demuxer = {
827 NULL_IF_CONFIG_SMALL("MPEG video"),
831 raw_read_partial_packet,
832 .flags= AVFMT_GENERIC_INDEX,
833 .value = CODEC_ID_MPEG1VIDEO,
837 AVOutputFormat null_muxer = {
839 NULL_IF_CONFIG_SMALL("null video format"),
843 #ifdef WORDS_BIGENDIAN
851 .flags = AVFMT_NOFILE | AVFMT_RAWPICTURE | AVFMT_NOTIMESTAMPS,
853 #endif //CONFIG_MUXERS
855 AVInputFormat rawvideo_demuxer = {
857 NULL_IF_CONFIG_SMALL("raw video format"),
861 rawvideo_read_packet,
862 .flags= AVFMT_GENERIC_INDEX,
863 .extensions = "yuv,cif,qcif,rgb",
864 .value = CODEC_ID_RAWVIDEO,
868 AVOutputFormat rawvideo_muxer = {
870 NULL_IF_CONFIG_SMALL("raw video format"),
878 .flags= AVFMT_NOTIMESTAMPS,
880 #endif //CONFIG_MUXERS
882 #ifdef CONFIG_ROQ_MUXER
883 AVOutputFormat roq_muxer =
886 NULL_IF_CONFIG_SMALL("id RoQ format"),
895 #endif //CONFIG_ROQ_MUXER
897 AVInputFormat shorten_demuxer = {
899 NULL_IF_CONFIG_SMALL("raw Shorten"),
903 raw_read_partial_packet,
904 .flags= AVFMT_GENERIC_INDEX,
906 .value = CODEC_ID_SHORTEN,
909 AVInputFormat vc1_demuxer = {
911 NULL_IF_CONFIG_SMALL("raw VC-1"),
913 NULL /* vc1_probe */,
915 raw_read_partial_packet,
917 .value = CODEC_ID_VC1,
922 #define PCMINPUTDEF(name, long_name, ext, codec) \
923 AVInputFormat pcm_ ## name ## _demuxer = {\
925 NULL_IF_CONFIG_SMALL(long_name),\
932 .flags= AVFMT_GENERIC_INDEX,\
937 #define PCMOUTPUTDEF(name, long_name, ext, codec) \
938 AVOutputFormat pcm_ ## name ## _muxer = {\
940 NULL_IF_CONFIG_SMALL(long_name),\
948 .flags= AVFMT_NOTIMESTAMPS,\
952 #if !defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
953 #define PCMDEF(name, long_name, ext, codec) \
954 PCMINPUTDEF(name, long_name, ext, codec)
955 #elif defined(CONFIG_MUXERS) && !defined(CONFIG_DEMUXERS)
956 #define PCMDEF(name, long_name, ext, codec) \
957 PCMOUTPUTDEF(name, long_name, ext, codec)
958 #elif defined(CONFIG_MUXERS) && defined(CONFIG_DEMUXERS)
959 #define PCMDEF(name, long_name, ext, codec) \
960 PCMINPUTDEF(name, long_name, ext, codec)\
961 PCMOUTPUTDEF(name, long_name, ext, codec)
963 #define PCMDEF(name, long_name, ext, codec)
966 #ifdef WORDS_BIGENDIAN
968 #define LE_DEF(s) NULL
970 #define BE_DEF(s) NULL
975 PCMDEF(s16be, "PCM signed 16 bit big-endian format",
976 BE_DEF("sw"), CODEC_ID_PCM_S16BE)
978 PCMDEF(s16le, "PCM signed 16 bit little-endian format",
979 LE_DEF("sw"), CODEC_ID_PCM_S16LE)
981 PCMDEF(s8, "PCM signed 8 bit format",
982 "sb", CODEC_ID_PCM_S8)
984 PCMDEF(u16be, "PCM unsigned 16 bit big-endian format",
985 BE_DEF("uw"), CODEC_ID_PCM_U16BE)
987 PCMDEF(u16le, "PCM unsigned 16 bit little-endian format",
988 LE_DEF("uw"), CODEC_ID_PCM_U16LE)
990 PCMDEF(u8, "PCM unsigned 8 bit format",
991 "ub", CODEC_ID_PCM_U8)
993 PCMDEF(alaw, "PCM A-law format",
994 "al", CODEC_ID_PCM_ALAW)
996 PCMDEF(mulaw, "PCM mu-law format",
997 "ul", CODEC_ID_PCM_MULAW)