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#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()
{
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);
}
}
void cAudioOss::releaseDevice()
{
close(fd);
}
void cAudioOss::setup(SampleContext ctx)
{
// 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)
{
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;
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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