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/*
*
* Copyright (C) 2009 Christian Gmeiner
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <sys/soundcard.h>
#include <unistd.h> // for close
#include "dxr3audio-oss.h"
#include "dxr3interface.h"
static const char *DEV_DXR3_OSS = "_ma";
void cAudioOss::openDevice()
{
if (open)
return;
fd = cDxr3Interface::Dxr3Open(DEV_DXR3_OSS, O_RDWR | O_NONBLOCK);
if (!fd) {
esyslog("[dxr3-audio-oss] failed to open dxr3 audio subdevice");
exit(1);
}
if (cDxr3ConfigData::instance()->GetUseDigitalOut()) {
dsyslog("[dxr3-audio-oss] audio mode: digital");
setAudioMode(DigitalPcm);
} else {
dsyslog("[dxr3-audio-oss] audio mode: analog");
setAudioMode(Analog);
}
open = true;
}
void cAudioOss::releaseDevice()
{
if (!open)
return;
close(fd);
open = false;
}
void cAudioOss::setup(const SampleContext& ctx)
{
if (!open)
return;
// set sample rate
if (curContext.samplerate != ctx.samplerate) {
dsyslog("[dxr3-audio-oss] changing samplerate to %d (old %d) ", ctx.samplerate, curContext.samplerate);
curContext.samplerate = ctx.samplerate;
CHECK( ioctl(fd, SNDCTL_DSP_SAMPLESIZE, &ctx.samplerate));
}
// set channels
if (curContext.channels != ctx.channels) {
dsyslog("[dxr3-audio-oss] changing num of channels to %d (old %d)", ctx.channels, curContext.channels);
curContext.channels = ctx.channels;
CHECK( ioctl(fd, SNDCTL_DSP_CHANNELS, &ctx.channels));
}
}
void cAudioOss::write(uchar* data, size_t size)
{
if (!open)
return;
size_t ret = WriteAllOrNothing(fd, data, size, 1000, 10);
if (ret != size) {
dsyslog("[dxr3-audio-oss] writing audio failed");
}
}
void cAudioOss::setAudioMode(AudioMode mode)
{
uint32_t ioval = 0;
switch (mode) {
case Analog:
ioval = EM8300_AUDIOMODE_ANALOG;
break;
case DigitalPcm:
ioval = EM8300_AUDIOMODE_DIGITALPCM;
break;
case Ac3:
ioval = EM8300_AUDIOMODE_DIGITALAC3;
break;
}
// we need to do it this way, as we dont have access
// to the file handle for the conrtol sub device.
if (cDxr3Interface::instance()->OssSetPlayMode(ioval)) {
this->mode = mode;
}
}
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