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/* $OpenBSD: legacy.c,v 1.4 2008/11/08 10:40:52 ratchov Exp $ */
/*
* Copyright (c) 1997 Kenneth Stailey. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Kenneth Stailey.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/audioio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <err.h>
#include "wav.h"
/* headerless data files. played at /dev/audio's defaults.
*/
#define FMT_RAW 0
/* Sun/NeXT .au files. header is skipped and /dev/audio is configured
* for monaural 8-bit ulaw @ 8kHz, the de facto format for .au files,
* as well as the historical default configuration for /dev/audio.
*/
#define FMT_AU 1
/* RIFF WAV files. header is parsed for format details which are
* applied to /dev/audio.
*/
#define FMT_WAV 2
/*
* Convert sun device parameters to struct aparams
*/
int
sun_infotopar(struct audio_prinfo *ai, struct aparams *par)
{
par->rate = ai->sample_rate;
par->bps = ai->precision / 8;
par->bits = ai->precision;
par->cmax = par->cmin + ai->channels - 1;
if (par->cmax > NCHAN_MAX - 1) {
warnx("%u:%u: channel range out of bounds",
par->cmin, par->cmax);
return 0;
}
par->msb = 1;
switch (ai->encoding) {
case AUDIO_ENCODING_SLINEAR_LE:
par->le = 1;
par->sig = 1;
break;
case AUDIO_ENCODING_SLINEAR_BE:
par->le = 0;
par->sig = 1;
break;
case AUDIO_ENCODING_ULINEAR_LE:
par->le = 1;
par->sig = 0;
break;
case AUDIO_ENCODING_ULINEAR_BE:
par->le = 0;
par->sig = 0;
break;
case AUDIO_ENCODING_SLINEAR:
par->le = NATIVE_LE;
par->sig = 1;
break;
case AUDIO_ENCODING_ULINEAR:
par->le = NATIVE_LE;
par->sig = 0;
break;
default:
warnx("only linear encodings are supported for audio devices");
return 0;
}
return 1;
}
/*
* Convert struct aparams to sun device parameters.
*/
void
sun_partoinfo(struct audio_prinfo *ai, struct aparams *par)
{
ai->sample_rate = par->rate;
ai->precision = par->bps * 8;
ai->channels = par->cmax - par->cmin + 1;
if (par->le && par->sig) {
ai->encoding = AUDIO_ENCODING_SLINEAR_LE;
} else if (!par->le && par->sig) {
ai->encoding = AUDIO_ENCODING_SLINEAR_BE;
} else if (par->le && !par->sig) {
ai->encoding = AUDIO_ENCODING_ULINEAR_LE;
} else {
ai->encoding = AUDIO_ENCODING_ULINEAR_BE;
}
}
int
legacy_play(char *dev, char *aufile)
{
struct audio_prinfo ai;
struct audio_info info;
struct aparams par;
ssize_t rd;
off_t datasz;
char buf[5120];
int afd, fd, fmt = FMT_RAW;
u_int32_t pos = 0;
char magic[4];
if ((fd = open(aufile, O_RDONLY)) < 0) {
warn("cannot open %s", aufile);
return(1);
}
if (read(fd, magic, sizeof(magic)) != sizeof(magic)) {
/* read() error, or the file is smaller than sizeof(magic).
* treat as a raw file, like previous versions of aucat.
*/
} else if (!strncmp(magic, ".snd", 4)) {
fmt = FMT_AU;
if (read(fd, &pos, sizeof(pos)) == sizeof(pos))
pos = ntohl(pos);
} else if (!strncmp(magic, "RIFF", 4) &&
wav_readhdr(fd, &par, &datasz)) {
fmt = FMT_WAV;
}
/* seek to start of audio data. wav_readhdr already took care
* of this for FMT_WAV.
*/
if (fmt == FMT_RAW || fmt == FMT_AU)
if (lseek(fd, (off_t)pos, SEEK_SET) == -1)
warn("lseek");
if (dev == NULL) {
dev = getenv("AUDIODEVICE");
if (dev == NULL)
dev = "/dev/audio";
}
if ((afd = open(dev, O_WRONLY)) < 0) {
warn("can't open %s", dev);
return(1);
}
AUDIO_INITINFO(&info);
ai = info.play;
switch(fmt) {
case FMT_WAV:
sun_partoinfo(&ai, &par);
break;
case FMT_AU:
ai.encoding = AUDIO_ENCODING_ULAW;
ai.precision = 8;
ai.sample_rate = 8000;
ai.channels = 1;
break;
case FMT_RAW:
default:
break;
}
info.play = ai;
if (ioctl(afd, AUDIO_SETINFO, &info) < 0) {
warn("%s", dev);
/* only WAV could fail in previous aucat versions (unless
* the parameters returned by AUDIO_GETINFO would fail,
* which is unlikely)
*/
if (fmt == FMT_WAV)
return(1);
}
/* parameters may be silently modified. see audio(9)'s
* description of set_params. for compatability with previous
* aucat versions, continue running if something doesn't match.
*/
(void) ioctl(afd, AUDIO_GETINFO, &info);
if (info.play.encoding != ai.encoding ||
info.play.precision != ai.precision ||
info.play.channels != ai.channels ||
/* devices may return a very close rate, such as 44099 when
* 44100 was requested. the difference is inaudible. allow
* 2% deviation as an example of how to cope.
*/
(info.play.sample_rate > ai.sample_rate * 1.02 ||
info.play.sample_rate < ai.sample_rate * 0.98)) {
warnx("format not supported by %s", dev);
}
while ((rd = read(fd, buf, sizeof(buf))) > 0)
if (write(afd, buf, rd) != rd)
warn("write");
if (rd == -1)
warn("read");
(void) close(afd);
(void) close(fd);
return(0);
}
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