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/*******************************************************************************
* Copyright 2009-2021 Jörg Müller
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
#include "CoreAudioDevice.h"
#include "devices/DeviceManager.h"
#include "devices/IDeviceFactory.h"
#include "Exception.h"
#include "IReader.h"
AUD_NAMESPACE_BEGIN
OSStatus CoreAudioDevice::CoreAudio_mix(void* data, AudioUnitRenderActionFlags* flags, const AudioTimeStamp* time_stamp, UInt32 bus_number, UInt32 number_frames, AudioBufferList* buffer_list)
{
CoreAudioDevice* device = (CoreAudioDevice*)data;
for(int i = 0; i < buffer_list->mNumberBuffers; i++)
{
auto& buffer = buffer_list->mBuffers[i];
device->mix((data_t*)buffer.mData, buffer.mDataByteSize / AUD_DEVICE_SAMPLE_SIZE(device->m_specs));
}
return noErr;
}
void CoreAudioDevice::playing(bool playing)
{
if(m_playback != playing)
{
if(playing)
AudioOutputUnitStart(m_audio_unit);
else
AudioOutputUnitStop(m_audio_unit);
}
m_playback = playing;
}
CoreAudioDevice::CoreAudioDevice(DeviceSpecs specs, int buffersize) :
m_playback(false),
m_audio_unit(nullptr)
{
AudioComponentDescription component_description = {};
component_description.componentType = kAudioUnitType_Output;
component_description.componentSubType = kAudioUnitSubType_DefaultOutput;
component_description.componentManufacturer = kAudioUnitManufacturer_Apple;
AudioComponent component = AudioComponentFindNext(nullptr, &component_description);
if(!component)
AUD_THROW(DeviceException, "The audio device couldn't be opened with CoreAudio.");
OSStatus status = AudioComponentInstanceNew(component, &m_audio_unit);
if(status != noErr)
AUD_THROW(DeviceException, "The audio device couldn't be opened with CoreAudio.");
AudioStreamBasicDescription stream_basic_description = {};
if(specs.channels == CHANNELS_INVALID)
specs.channels = CHANNELS_STEREO;
if(specs.format == FORMAT_INVALID)
specs.format = FORMAT_FLOAT32;
if(specs.rate == RATE_INVALID)
specs.rate = RATE_48000;
switch(specs.format)
{
case FORMAT_U8:
stream_basic_description.mFormatFlags = 0;
stream_basic_description.mBitsPerChannel = 8;
break;
case FORMAT_S16:
stream_basic_description.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
stream_basic_description.mBitsPerChannel = 16;
break;
case FORMAT_S24:
stream_basic_description.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
stream_basic_description.mBitsPerChannel = 24;
break;
case FORMAT_S32:
stream_basic_description.mFormatFlags = kLinearPCMFormatFlagIsSignedInteger;
stream_basic_description.mBitsPerChannel = 32;
break;
case FORMAT_FLOAT32:
stream_basic_description.mFormatFlags = kLinearPCMFormatFlagIsFloat;
stream_basic_description.mBitsPerChannel = 32;
break;
case FORMAT_FLOAT64:
stream_basic_description.mFormatFlags = kLinearPCMFormatFlagIsFloat;
stream_basic_description.mBitsPerChannel = 64;
break;
default:
specs.format = FORMAT_FLOAT32;
stream_basic_description.mFormatFlags = kLinearPCMFormatFlagIsFloat;
stream_basic_description.mBitsPerChannel = 32;
break;
}
stream_basic_description.mSampleRate = specs.rate;
stream_basic_description.mFormatID = kAudioFormatLinearPCM;
stream_basic_description.mFormatFlags |= kAudioFormatFlagsNativeEndian | kLinearPCMFormatFlagIsPacked;
stream_basic_description.mBytesPerPacket = stream_basic_description.mBytesPerFrame = AUD_DEVICE_SAMPLE_SIZE(specs);
stream_basic_description.mFramesPerPacket = 1;
stream_basic_description.mChannelsPerFrame = specs.channels;
status = AudioUnitSetProperty(m_audio_unit, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &stream_basic_description, sizeof(stream_basic_description));
if(status != noErr)
{
AudioComponentInstanceDispose(m_audio_unit);
AUD_THROW(DeviceException, "The audio device couldn't be opened with CoreAudio.");
}
m_specs = specs;
AURenderCallbackStruct render_callback_struct;
render_callback_struct.inputProc = CoreAudioDevice::CoreAudio_mix;
render_callback_struct.inputProcRefCon = this;
status = AudioUnitSetProperty(m_audio_unit, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &render_callback_struct, sizeof(render_callback_struct));
if(status != noErr)
{
AudioComponentInstanceDispose(m_audio_unit);
AUD_THROW(DeviceException, "The audio device couldn't be opened with CoreAudio.");
}
status = AudioUnitInitialize(m_audio_unit);
if(status != noErr)
{
AudioComponentInstanceDispose(m_audio_unit);
AUD_THROW(DeviceException, "The audio device couldn't be opened with CoreAudio.");
}
try
{
m_synchronizer = std::unique_ptr<CoreAudioSynchronizer>(new CoreAudioSynchronizer(m_audio_unit));
}
catch(Exception&)
{
AudioComponentInstanceDispose(m_audio_unit);
throw;
}
create();
}
CoreAudioDevice::~CoreAudioDevice()
{
AudioOutputUnitStop(m_audio_unit);
AudioUnitUninitialize(m_audio_unit);
AudioComponentInstanceDispose(m_audio_unit);
destroy();
}
ISynchronizer* CoreAudioDevice::getSynchronizer()
{
return m_synchronizer.get();
}
class CoreAudioDeviceFactory : public IDeviceFactory
{
private:
DeviceSpecs m_specs;
int m_buffersize;
public:
CoreAudioDeviceFactory() :
m_buffersize(AUD_DEFAULT_BUFFER_SIZE)
{
m_specs.format = FORMAT_FLOAT32;
m_specs.channels = CHANNELS_STEREO;
m_specs.rate = RATE_48000;
}
virtual std::shared_ptr<IDevice> openDevice()
{
return std::shared_ptr<IDevice>(new CoreAudioDevice(m_specs, m_buffersize));
}
virtual int getPriority()
{
return 1 << 15;
}
virtual void setSpecs(DeviceSpecs specs)
{
m_specs = specs;
}
virtual void setBufferSize(int buffersize)
{
m_buffersize = buffersize;
}
virtual void setName(std::string name)
{
}
};
void CoreAudioDevice::registerPlugin()
{
DeviceManager::registerDevice("CoreAudio", std::shared_ptr<IDeviceFactory>(new CoreAudioDeviceFactory));
}
#ifdef COREAUDIO_PLUGIN
extern "C" AUD_PLUGIN_API void registerPlugin()
{
CoreAudioDevice::registerPlugin();
}
extern "C" AUD_PLUGIN_API const char* getName()
{
return "CoreAudio";
}
#endif
AUD_NAMESPACE_END
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