bool CCoreAudioDevice::GetPreferredChannelLayout(CCoreAudioChannelLayout& layout) const
{
if (!m_DeviceId)
return false;
AudioObjectPropertyAddress propertyAddress;
propertyAddress.mScope = kAudioDevicePropertyScopeOutput;
propertyAddress.mElement = 0;
propertyAddress.mSelector = kAudioDevicePropertyPreferredChannelLayout;
UInt32 propertySize = 0;
OSStatus ret = AudioObjectGetPropertyDataSize(m_DeviceId, &propertyAddress, 0, NULL, &propertySize);
if (ret)
return false;
void* pBuf = malloc(propertySize);
ret = AudioObjectGetPropertyData(m_DeviceId, &propertyAddress, 0, NULL, &propertySize, pBuf);
if (ret != noErr)
CLog::Log(LOGERROR, "CCoreAudioDevice::GetPreferredChannelLayout: "
"Unable to retrieve preferred channel layout. Error = %s", GetError(ret).c_str());
else
{
// Copy the result into the caller's instance
layout.CopyLayout(*((AudioChannelLayout*)pBuf));
}
free(pBuf);
return (ret == noErr);
}
bool CAUOutputDevice::GetPreferredChannelLayout(CCoreAudioChannelLayout& layout)
{
if (!m_DeviceId)
return false;
UInt32 propertySize = 0;
Boolean writable = false;
OSStatus ret = AudioDeviceGetPropertyInfo(m_DeviceId, 0, false,
kAudioDevicePropertyPreferredChannelLayout, &propertySize, &writable);
if (ret)
return false;
void* pBuf = malloc(propertySize);
ret = AudioDeviceGetProperty(m_DeviceId, 0, false,
kAudioDevicePropertyPreferredChannelLayout, &propertySize, pBuf);
if (ret)
CLog::Log(LOGERROR, "CAUOutputDevice::GetPreferredChannelLayout: "
"Unable to retrieve preferred channel layout. Error = %s", GetError(ret).c_str());
else
{
// Copy the result into the caller's instance
layout.CopyLayout(*((AudioChannelLayout*)pBuf));
}
free(pBuf);
return (ret == noErr);
}