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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.
******************************************************************************/
#pragma once
#ifdef COREAUDIO_PLUGIN
#define AUD_BUILD_PLUGIN
#endif
/**
* @file CoreAudioDevice.h
* @ingroup plugin
* The CoreAudioDevice class.
*/
#include "CoreAudioSynchronizer.h"
#include "devices/SoftwareDevice.h"
#include <memory>
#include <AudioUnit/AudioUnit.h>
AUD_NAMESPACE_BEGIN
/**
* This device plays back through CoreAudio, the Apple audio API.
*/
class AUD_PLUGIN_API CoreAudioDevice : public SoftwareDevice
{
private:
/**
* Whether there is currently playback.
*/
bool m_playback;
/**
* The CoreAudio AudioUnit.
*/
AudioUnit m_audio_unit;
/**
* The Synchronizer.
*/
std::unique_ptr<CoreAudioSynchronizer> m_synchronizer;
/**
* Mixes the next bytes into the buffer.
* \param data The CoreAudio device.
* \param flags Unused flags.
* \param time_stamp Unused time stamp.
* \param bus_number Unused bus number.
* \param number_frames Unused number of frames.
* \param buffer_list The list of buffers to be filled.
*/
AUD_LOCAL static OSStatus CoreAudio_mix(void* data, AudioUnitRenderActionFlags* flags, const AudioTimeStamp* time_stamp, UInt32 bus_number, UInt32 number_frames, AudioBufferList* buffer_list);
// delete copy constructor and operator=
CoreAudioDevice(const CoreAudioDevice&) = delete;
CoreAudioDevice& operator=(const CoreAudioDevice&) = delete;
protected:
virtual void playing(bool playing);
public:
/**
* Opens the CoreAudio audio device for playback.
* \param specs The wanted audio specification.
* \param buffersize The size of the internal buffer.
* \note The specification really used for opening the device may differ.
* \exception Exception Thrown if the audio device cannot be opened.
*/
CoreAudioDevice(DeviceSpecs specs, int buffersize = AUD_DEFAULT_BUFFER_SIZE);
/**
* Closes the CoreAudio audio device.
*/
virtual ~CoreAudioDevice();
virtual ISynchronizer* getSynchronizer();
/**
* Registers this plugin.
*/
static void registerPlugin();
};
AUD_NAMESPACE_END
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