ref: c61a5fec6258b484fc7e5fbd2a088eff1c4571be
dir: /src/oss.c/
#if defined(OSS_PLAYER)
/*
* Copyright 1997 Chris Bagwell And Sundry Contributors
* This source code is freely redistributable and may be used for
* any purpose. This copyright notice must be maintained.
* Chris Bagwell And Sundry Contributors are not
* responsible for the consequences of using this software.
*/
/* Direct to Open Sound System (OSS) sound driver
* OSS is a popular unix sound driver for Intel x86 unices (eg. Linux)
* and several other unixes (such as SunOS/Solaris).
* This driver is compatible with OSS original source that was called
* USS, Voxware and TASD.
*
* added by Chris Bagwell (cbagwell@sprynet.com) on 2/19/96
* based on info grabed from vplay.c in Voxware snd-utils-3.5 package.
* and on LINUX_PLAYER patches added by Greg Lee
* which was originally from Directo to Sound Blaster device driver (sbdsp.c).
* SBLAST patches by John T. Kohl.
*/
#include <malloc.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/soundcard.h>
#include <sys/ioctl.h>
#include "st.h"
#include "libst.h"
/*
* Do anything required before you start reading samples.
* Read file header.
* Find out sampling rate,
* size and style of samples,
* mono/stereo/quad.
*/
void ossdspstartread(ft)
ft_t ft;
{
int tmp;
int samplesize = 8, dsp_stereo;
if (ft->info.rate == 0.0) ft->info.rate = 8000;
if (ft->info.size == -1) ft->info.size = BYTE;
if (ft->info.size == BYTE) {
samplesize = 8;
if (ft->info.style == -1)
ft->info.style = UNSIGNED;
if (ft->info.style != UNSIGNED) {
fail("OSS driver only supports unsigned with bytes");
}
}
else if (ft->info.size == WORD) {
samplesize = 16;
if (ft->info.style == -1)
ft->info.style = SIGN2;
if (ft->info.style != SIGN2) {
fail("OSS driver only supports signed with words");
}
}
else {
fail("OSS driver only supports bytes and words");
}
if (ft->info.channels == -1) ft->info.channels = 1;
else if (ft->info.channels > 2) ft->info.channels = 2;
ioctl(fileno(ft->fp), SNDCTL_DSP_RESET, 0);
ioctl (fileno(ft->fp), SNDCTL_DSP_GETBLKSIZE, &ft->file.size);
if (ft->file.size < 4 || ft->file.size > 65536) {
fail("Invalid audio buffer size %d", ft->file.size);
}
ft->file.count = 0;
ft->file.pos = 0;
ft->file.eof = 0;
if ((ft->file.buf = malloc (ft->file.size)) == NULL) {
fail("Unable to allocate input/output buffer of size %d", ft->file.size);
}
if (ioctl(fileno(ft->fp), SNDCTL_DSP_SYNC, NULL) < 0) {
fail("Unable to sync dsp");
}
tmp = samplesize;
ioctl(fileno(ft->fp), SNDCTL_DSP_SAMPLESIZE, &tmp);
if (tmp != samplesize) {
fail("Unable to set the sample size to %d", samplesize);
}
if (ft->info.channels == 2) dsp_stereo = 1;
else dsp_stereo = 0;
tmp = dsp_stereo;
ioctl(fileno(ft->fp), SNDCTL_DSP_STEREO, &tmp);
if (tmp != dsp_stereo) {
ft->info.channels = 1;
warn("Couldn't set to %s", dsp_stereo? "stereo":"mono");
dsp_stereo = 0;
}
tmp = ft->info.rate;
ioctl (fileno(ft->fp), SNDCTL_DSP_SPEED, &tmp);
if (ft->info.rate != tmp) {
if (ft->info.rate - tmp > tmp/10 || tmp - ft->info.rate > tmp/10)
warn("Unable to set audio speed to %d (set to %d)",
ft->info.rate, tmp);
ft->info.rate = tmp;
}
sigintreg(ft); /* Prepare to catch SIGINT */
}
void ossdspstartwrite(ft)
ft_t ft;
{
int samplesize = 8, dsp_stereo;
int tmp;
if (ft->info.rate == 0.0) ft->info.rate = 8000;
if (ft->info.size == -1) ft->info.size = BYTE;
if (ft->info.size == BYTE) {
samplesize = 8;
if (ft->info.style == -1)
ft->info.style = UNSIGNED;
if (ft->info.style != UNSIGNED) {
report("OSS driver only supports unsigned with bytes");
report("Forcing to unsigned");
ft->info.style = UNSIGNED;
}
}
else if (ft->info.size == WORD) {
samplesize = 16;
if (ft->info.style == -1)
ft->info.style = SIGN2;
if (ft->info.style != SIGN2) {
report("OSS driver only supports signed with words");
report("Forcing to signed linear");
ft->info.style = SIGN2;
}
}
else {
ft->info.size = WORD;
ft->info.style = SIGN2;
report("OSS driver only supports bytes and words");
report("Forcing to signed linear word");
}
if (ft->info.channels == -1) ft->info.channels = 1;
else if (ft->info.channels > 2) ft->info.channels = 2;
ioctl(fileno(ft->fp), SNDCTL_DSP_RESET, 0);
ioctl (fileno(ft->fp), SNDCTL_DSP_GETBLKSIZE, &ft->file.size);
if (ft->file.size < 4 || ft->file.size > 65536) {
fail("Invalid audio buffer size %d", ft->file.size);
}
ft->file.count = 0;
ft->file.pos = 0;
ft->file.eof = 0;
if ((ft->file.buf = malloc (ft->file.size)) == NULL) {
fail("Unable to allocate input/output buffer of size %d", ft->file.size);
}
if (ioctl(fileno(ft->fp), SNDCTL_DSP_SYNC, NULL) < 0) {
fail("Unable to sync dsp");
}
tmp = samplesize;
ioctl(fileno(ft->fp), SNDCTL_DSP_SAMPLESIZE, &tmp);
if (tmp != samplesize) {
fail("Unable to set the sample size to %d", samplesize);
}
if (ft->info.channels == 2) dsp_stereo = 1;
else dsp_stereo = 0;
tmp = dsp_stereo;
ioctl(fileno(ft->fp), SNDCTL_DSP_STEREO, &tmp);
if (tmp != dsp_stereo) {
ft->info.channels = 1;
warn("Couldn't set to %s", dsp_stereo? "stereo":"mono");
dsp_stereo = 0;
}
tmp = ft->info.rate;
ioctl (fileno(ft->fp), SNDCTL_DSP_SPEED, &tmp);
if (ft->info.rate != tmp) {
if (ft->info.rate - tmp > tmp/10 || tmp - ft->info.rate > tmp/10)
warn("Unable to set audio speed to %d (set to %d)",
ft->info.rate, tmp);
ft->info.rate = tmp;
}
}
#endif