CoreAudioDriver.h

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/*
 * Hydrogen
 * Copyright(c) 2002-2008 by Alex >Comix< Cominu [comix@users.sourceforge.net]
 * Copyright(c) 2008-2025 The hydrogen development team [hydrogen-devel@lists.sourceforge.net]
 *
 * http://hydrogen.sourceforge.net
 *
 * CoreAudio Driver for Hydrogen
 * Copyright(c) 2005 by Jonathan Dempsey [jonathandempsey@fastmail.fm]
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY, without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see https://www.gnu.org/licenses
 *
 * Rewrote CoreAudio driver, now using AUHAL (2005/03/02 Jonathan Dempsey)
 * Cleaned up the code a bit and updated (2005/11/29 Jonathan Dempsey)
 * More cleaning . . . (2005/12/31 Jonathan Dempsey)
 */
 
#ifndef COREAUDIO_DRIVER_H
#define COREAUDIO_DRIVER_H
 
#include <core/IO/AudioOutput.h>
#include <core/IO/NullDriver.h>
 
#if defined(H2CORE_HAVE_COREAUDIO) || _DOXYGEN_
#include <AudioUnit/AudioUnit.h>
#include <AudioToolbox/AudioToolbox.h>
#include <AudioUnit/AudioComponent.h>
#endif
 
#include <core/Preferences/Preferences.h>
#include <inttypes.h>
#include <vector>
 
 
namespace H2Core
{
 
#if defined(H2CORE_HAVE_COREAUDIO) || _DOXYGEN_

class CoreAudioDriver : public Object<CoreAudioDriver>, public AudioOutput
{
        H2_OBJECT(CoreAudioDriver)
public:
 
        audioProcessCallback mProcessCallback;
        UInt32 m_nBufferSize;
 
        AudioUnit m_outputUnit;
        AudioDeviceID m_outputDevice;
 
        float* m_pOut_L;
        float* m_pOut_R;
 
        CoreAudioDriver( audioProcessCallback processCallback );
        virtual ~CoreAudioDriver();
 
        virtual int init( unsigned nBufferSize ) override;
 
        virtual unsigned getSampleRate() override;
        virtual unsigned getBufferSize() override;
 
        virtual int connect() override;
        virtual void disconnect() override;
 
        virtual float* getOut_L() override;
        virtual float* getOut_R() override;
 
        static QStringList getDevices();
 
        virtual int getLatency() override;
 
private:
        AudioDeviceID defaultOutputDevice(void);
        void retrieveBufferSize(void);
        void printStreamInfo(void);
 
        // Find the name of a given audio device
        static QString deviceName( AudioDeviceID deviceID );
 
        // Find suitable audio output devices
        static std::vector< AudioDeviceID > outputDeviceIDs();
 
        AudioDeviceID preferredOutputDevice();
 
        bool m_bIsRunning;
        unsigned m_nSampleRate;
        unsigned oSampleRate;
};
 
#else

class CoreAudioDriver : public Object<CoreAudioDriver>, public NullDriver
{
        H2_OBJECT(CoreAudioDriver)
public:
        CoreAudioDriver( audioProcessCallback processCallback ) : NullDriver ( processCallback ) {}
 
};
 
#endif // H2CORE_HAVE_COREAUDIO
 
}
 
#endif