/*  This file is part of the KDE project.

    Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

    This library is free software: you can redistribute it and/or modify

    it under the terms of the GNU Lesser General Public License as published by

    the Free Software Foundation, either version 2.1 or 3 of the License.

    This library 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 Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License

    along with this library.  If not, see <http://www.gnu.org/licenses/>.

*/

#include "audioconnection.h"

#include "medianode.h"

#include "audionode.h"

#include "audiograph.h"

QT_BEGIN_NAMESPACE

namespace Phonon

{

namespace QT7

{

    AudioConnection::AudioConnection()

        :   m_source(0), m_sourceAudioNode(0), m_sourceOutputBus(0),

            m_sink(0), m_sinkAudioNode(0), m_sinkInputBus(0),

            m_sourceChannelLayout(0), m_sinkChannelLayout(0),

            m_hasSourceSpecification(false), m_hasSinkSpecification(false), m_connected(false)

    {}

    AudioConnection::AudioConnection(MediaNode *source, int output, MediaNode *sink, int input)

        : m_source(source), m_sourceAudioNode(source->m_audioNode), m_sourceOutputBus(output),

        m_sink(sink), m_sinkAudioNode(sink->m_audioNode), m_sinkInputBus(input),

        m_sourceChannelLayout(0), m_sinkChannelLayout(0),

        m_hasSourceSpecification(false), m_hasSinkSpecification(false), m_connected(false)

    {}

    AudioConnection::AudioConnection(MediaNode *sink)

        : m_source(0), m_sourceAudioNode(0), m_sourceOutputBus(0),

        m_sink(sink), m_sinkAudioNode(sink->m_audioNode), m_sinkInputBus(0),

        m_sourceChannelLayout(0), m_sinkChannelLayout(0), m_connected(false)

    {}

    AudioConnection::AudioConnection(AudioNode *source, int output, AudioNode *sink, int input)

        : m_source(0), m_sourceAudioNode(source), m_sourceOutputBus(output),

        m_sink(0), m_sinkAudioNode(sink), m_sinkInputBus(input),

        m_sourceChannelLayout(0), m_sinkChannelLayout(0),

        m_hasSourceSpecification(false), m_hasSinkSpecification(false), m_connected(false)

    {}

    AudioConnection::AudioConnection(AudioNode *sink)

        : m_source(0), m_sourceAudioNode(0), m_sourceOutputBus(0),

        m_sink(0), m_sinkAudioNode(sink), m_sinkInputBus(0),

        m_sourceChannelLayout(0), m_sinkChannelLayout(0), m_connected(false)

    {}

    AudioConnection::~AudioConnection()

    {

        freeMemoryAllocations();

    }

    void AudioConnection::freeMemoryAllocations()

    {

        if (m_sinkChannelLayout && m_sourceChannelLayout != m_sinkChannelLayout)

            free(m_sinkChannelLayout);

        if (m_sourceChannelLayout)

            free(m_sourceChannelLayout);

        m_sinkChannelLayout = 0;

        m_sourceChannelLayout = 0;

    }

    bool AudioConnection::updateStreamSpecification()

    {

        m_hasSourceSpecification = false;

        m_hasSinkSpecification = false;

        freeMemoryAllocations();

        bool updateOk;

        if (m_sourceAudioNode){

            updateOk = m_sourceAudioNode->fillInStreamSpecification(this, AudioNode::Source);

            if (!updateOk)

                return false;

            updateOk = m_sourceAudioNode->setStreamSpecification(this, AudioNode::Source);

            if (!updateOk)

                return false;

        }

        updateOk = m_sinkAudioNode->fillInStreamSpecification(this, AudioNode::Sink);

        if (!updateOk)

            return false;

        updateOk = m_sinkAudioNode->setStreamSpecification(this, AudioNode::Sink);

        if (!updateOk)

            return false;

        return true;

    }

    bool AudioConnection::connect(AudioGraph *graph)

    {

        if (m_connected || !m_sourceAudioNode)

            return true;

        DEBUG_AUDIO_GRAPH("Connection" << int(this) << "connect"

        << int(m_sourceAudioNode) << m_sourceOutputBus << "->"

        << int(m_sinkAudioNode) << m_sinkInputBus)

        AUNode sourceOut = m_sourceAudioNode->getOutputAUNode();

        AUNode sinkIn = m_sinkAudioNode->getInputAUNode();

        OSStatus err = AUGraphConnectNodeInput(graph->audioGraphRef(), sourceOut, m_sourceOutputBus, sinkIn, m_sinkInputBus);

        m_connected = (err == noErr) ? true : false;

        return m_connected;

    }

    bool AudioConnection::disconnect(AudioGraph *graph)

    {

        if (!m_connected || !m_sourceAudioNode)

            return true;

        DEBUG_AUDIO_GRAPH("Connection" << int(this) << "disconnect"

        << int(m_sourceAudioNode) << m_sourceOutputBus << "->"

        << int(m_sinkAudioNode) << m_sinkInputBus)

        AUNode sinkIn = m_sinkAudioNode->getInputAUNode();

	    AUGraphDisconnectNodeInput(graph->audioGraphRef(), sinkIn, m_sinkInputBus);

        m_connected = false;

        return true;

    }

    void AudioConnection::invalidate()

    {

        m_connected = false;

    }

    bool AudioConnection::isBetween(MediaNode *source, MediaNode *sink){

        return (source == m_source) && (sink == m_sink);

    }

    bool AudioConnection::isValid(){

        return (m_sourceAudioNode != 0);

    }

    bool AudioConnection::isSinkOnly(){

        return (m_sourceAudioNode == 0) && (m_sinkAudioNode != 0);

    }

}} //namespace Phonon::QT7

QT_END_NAMESPACE