view JackDevice/DeviceManagerJack.h @ 4:ab6db404403a

commented JackDevice

/*
 Copyright (c) 2015, The Cinder Project

 This code is intended to be used with the Cinder C++ library, http://libcinder.org

 Redistribution and use in source and binary forms, with or without modification, are permitted provided that
 the following conditions are met:

    * Redistributions of source code must retain the above copyright notice, this list of conditions and
	the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
	the following disclaimer in the documentation and/or other materials provided with the distribution.

 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGE.
*/

#pragma once

#include "cinder/audio/Device.h"

namespace cinder { namespace audio { namespace linux {

/**
 * DeviceManager ( as in cinder::audio::DeviceManager ) that handle the hardware device through the jack library.
 * Note that this is not suitable for general purpose use. Most of the functionalities are indeed hard coded
 * just to suit Collidoscope needs. In particular only two input and two output ports are assumed. 
 *
 */ 
class DeviceManagerJack : public DeviceManager {
  public:

	DeviceManagerJack();
	virtual ~DeviceManagerJack();

	const std::vector<DeviceRef>& getDevices()		override;
	DeviceRef getDefaultOutput()				override;
	DeviceRef getDefaultInput()				override;

	std::string getName( const DeviceRef &device ) 		override;
	size_t getNumInputChannels( const DeviceRef &device )	override;
	size_t getNumOutputChannels( const DeviceRef &device )	override;
	size_t getSampleRate( const DeviceRef &device )		override;
	size_t getFramesPerBlock( const DeviceRef &device )	override;

	void setSampleRate( const DeviceRef &device, size_t sampleRate )		override;
	void setFramesPerBlock( const DeviceRef &device, size_t framesPerBlock )	override;

	//! Returns the hardware's actual frames per block, which might not be a power of two.
	size_t getFramesPerBlockHardware( const DeviceRef &device );

private:

	std::vector<DeviceRef> mDevices;
	DeviceRef   mDefaultOutDevice;
	DeviceRef   mDefaultInDevice;
    size_t mSampleRate;
    size_t mBufferSize;
};	

} } } // namespace cinder::audio::linux