BasiliskII/src/MacOSX/AudioDevice.cpp

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/*=============================================================================
	AudioDevice.cpp
	
=============================================================================*/

#include "AudioDevice.h"

void	AudioDevice::Init(AudioDeviceID devid, bool isInput)
{
	mID = devid;
	mIsInput = isInput;
	if (mID == kAudioDeviceUnknown) return;
	
	UInt32 propsize;
	
	propsize = sizeof(UInt32);
	verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertySafetyOffset, &propsize, &mSafetyOffset));
	
	propsize = sizeof(UInt32);
	verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyBufferFrameSize, &propsize, &mBufferSizeFrames));
	
	propsize = sizeof(AudioStreamBasicDescription);
	verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyStreamFormat, &propsize, &mFormat));

}

void	AudioDevice::SetBufferSize(UInt32 size)
{
	UInt32 propsize = sizeof(UInt32);
	verify_noerr(AudioDeviceSetProperty(mID, NULL, 0, mIsInput, kAudioDevicePropertyBufferFrameSize, propsize, &size));

	propsize = sizeof(UInt32);
	verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyBufferFrameSize, &propsize, &mBufferSizeFrames));
}

int		AudioDevice::CountChannels()
{
	OSStatus err;
	UInt32 propSize;
	int result = 0;
	
	err = AudioDeviceGetPropertyInfo(mID, 0, mIsInput, kAudioDevicePropertyStreamConfiguration, &propSize, NULL);
	if (err) return 0;

	AudioBufferList *buflist = (AudioBufferList *)malloc(propSize);
	err = AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyStreamConfiguration, &propSize, buflist);
	if (!err) {
		for (UInt32 i = 0; i < buflist->mNumberBuffers; ++i) {
			result += buflist->mBuffers[i].mNumberChannels;
		}
	}
	free(buflist);
	return result;
}

char *	AudioDevice::GetName(char *buf, UInt32 maxlen)
{
	verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyDeviceName, &maxlen, buf));
	return buf;
}