Collidoscope

/*

 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.

*/

#include "cinder/audio/linux/DeviceManagerJack.h"

#include "cinder/audio/Exception.h"

#include <jack/jack.h>

namespace cinder { namespace audio { namespace linux {

DeviceManagerJack::DeviceManagerJack()

{

    // hardcoded devices. They are always JackIn and JackOut

    mDevices.push_back( addDevice("JackIn") );

    mDevices.push_back( addDevice("JackOut") );

    jack_status_t status;

    // open a jack client, get info and close

        jack_client_t *client = jack_client_open ("device info", JackNullOption, &status, NULL);

    if( client == NULL){

        std::string msg = "jack_client_open() failed. ";

        if(status & JackServerFailed)

            msg += "Unable to connect to Jack server";

        throw cinder::audio::AudioContextExc(msg);

    }

    mSampleRate = jack_get_sample_rate( client );

    mBufferSize = jack_get_buffer_size( client );

    jack_client_close( client );

}

DeviceManagerJack::~DeviceManagerJack()

{

}

const std::vector<DeviceRef>& DeviceManagerJack::getDevices()

{

   return mDevices;

}

DeviceRef DeviceManagerJack::getDefaultOutput()

{

    return mDevices[1];

}

DeviceRef DeviceManagerJack::getDefaultInput()

{

    return mDevices[0];

}

//hardcoded name same as key

std::string DeviceManagerJack::getName( const DeviceRef &device )

{

    return device->getKey();

}

size_t DeviceManagerJack::getNumInputChannels( const DeviceRef &device )

{

    if( device->getKey() == mDevices[0]->getKey() )

        return 2;

    else

        return 0;

}

size_t DeviceManagerJack::getNumOutputChannels( const DeviceRef &device )

{

    if( device->getKey() == mDevices[1]->getKey() )

        return 2;

    else

        return 0;

}

size_t DeviceManagerJack::getSampleRate( const DeviceRef &device )

{

    return mSampleRate;

}

size_t DeviceManagerJack::getFramesPerBlock( const DeviceRef &device )

{

    return mBufferSize;

}

void DeviceManagerJack::setSampleRate( const DeviceRef &device, size_t sampleRate )

{

    throw "setSampleRate not supported";

}

void DeviceManagerJack::setFramesPerBlock( const DeviceRef &device, size_t framesPerBlock )

{

    throw "setFramesPerBlock not supported";

}

//! Returns the hardware's actual frames per block, which might not be a power of two.

//        size_t getFramesPerBlockHardware( const DeviceRef &device );

//

size_t DeviceManagerJack::getFramesPerBlockHardware( const DeviceRef &device )

{

    return mBufferSize;

}

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