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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 <sys/ioctl.h>
#include "dxr3audio-oss.h"
#include "dxr3device.h"
#include "settings.h"
static const char *DEV_DXR3_OSS = "_ma";
void cAudioOss::openDevice()
{
if (open)
return;
fd = cDxr3Device::Dxr3Open(DEV_DXR3_OSS, O_RDWR | O_NONBLOCK);
if (!fd) {
esyslog("[dxr3-audio-oss] failed to open dxr3 audio subdevice");
exit(1);
}
open = true;
}
void cAudioOss::releaseDevice()
{
if (!open)
return;
close(fd);
open = false;
}
void cAudioOss::setup(int channels, int samplerate)
{
if (!open)
return;
// set sample rate
if (curContext.samplerate != samplerate) {
dsyslog("[dxr3-audio-oss] changing samplerate to %d (old %d) ", samplerate, curContext.samplerate);
curContext.samplerate = samplerate;
CHECK( ioctl(fd, SNDCTL_DSP_SAMPLESIZE, &samplerate));
}
// set channels
if (curContext.channels != channels) {
dsyslog("[dxr3-audio-oss] changing num of channels to %d (old %d)", channels, curContext.channels);
curContext.channels = channels;
CHECK( ioctl(fd, SNDCTL_DSP_CHANNELS, &channels));
}
}
void cAudioOss::write(uchar* data, size_t size)
{
if (!open || !enabled)
return;
size_t ret = WriteAllOrNothing(fd, data, size, 1000, 10);
if (ret != size) {
dsyslog("[dxr3-audio-oss] writing audio failed");
}
}
void cAudioOss::flush()
{
CHECK(cDxr3Device::instance()->ossFlush());
}
void cAudioOss::poll(cPoller &poller)
{
poller.Add(fd, true);
}
void cAudioOss::setDigitalAudio(bool on)
{
if (digitalAudio == on)
return;
reconfigure();
digitalAudio = on;
}
void cAudioOss::reconfigure()
{
uint32_t ioval = 0;
dsyslog("[dxr3-oss] reconfigure");
// this is quite an imporant part, as we need to
// decide how we set the audiomode of oss device.
if (digitalAudio) {
ioval = EM8300_AUDIOMODE_DIGITALAC3;
} else {
// digital or analog pcm?
if (cSettings::instance()->useDigitalOut()) {
ioval = EM8300_AUDIOMODE_DIGITALPCM;
} else {
ioval = EM8300_AUDIOMODE_ANALOG;
}
}
// we need to do it this way, as we dont have access
// to the file handle for the conrtol sub device.
cDxr3Device::instance()->ossSetPlayMode(ioval);
}
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