juce_AudioTransportSource.h

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/*
  ==============================================================================

   This file is part of the JUCE library - "Jules' Utility Class Extensions"
   Copyright 2004-7 by Raw Material Software ltd.

  ------------------------------------------------------------------------------

   JUCE can be redistributed and/or modified 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.

   JUCE 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 JUCE; if not, visit www.gnu.org/licenses or write to the
   Free Software Foundation, Inc., 59 Temple Place, Suite 330,
   Boston, MA 02111-1307 USA

  ------------------------------------------------------------------------------

   If you'd like to release a closed-source product which uses JUCE, commercial
   licenses are also available: visit www.rawmaterialsoftware.com/juce for
   more information.

  ==============================================================================
*/

#ifndef __JUCE_AUDIOTRANSPORTSOURCE_JUCEHEADER__
#define __JUCE_AUDIOTRANSPORTSOURCE_JUCEHEADER__

#include "juce_BufferingAudioSource.h"
#include "juce_ResamplingAudioSource.h"
#include "../../events/juce_ChangeBroadcaster.h"


//==============================================================================
class JUCE_API  AudioTransportSource  : public PositionableAudioSource,
                                        public ChangeBroadcaster
{
public:
    //==============================================================================
    AudioTransportSource();

    ~AudioTransportSource();

    //==============================================================================
    void setSource (PositionableAudioSource* const newSource,
                    int readAheadBufferSize = 0,
                    double sourceSampleRateToCorrectFor = 0.0);

    //==============================================================================
    void setPosition (double newPosition);

    double getCurrentPosition() const;

    bool hasStreamFinished() const throw()              { return inputStreamEOF; }

    //==============================================================================
    void start();

    void stop();

    bool isPlaying() const throw()      { return playing; }

    //==============================================================================
    void setGain (const float newGain) throw();

    float getGain() const throw()       { return gain; }


    //==============================================================================
    void prepareToPlay (int samplesPerBlockExpected, double sampleRate);

    void releaseResources();

    void getNextAudioBlock (const AudioSourceChannelInfo& bufferToFill);

    //==============================================================================
    void setNextReadPosition (int newPosition);

    int getNextReadPosition() const;

    int getTotalLength() const;

    bool isLooping() const;

    //==============================================================================
    juce_UseDebuggingNewOperator

private:
    PositionableAudioSource* source;
    ResamplingAudioSource* resamplerSource;
    BufferingAudioSource* bufferingSource;
    PositionableAudioSource* positionableSource;
    AudioSource* masterSource;

    CriticalSection callbackLock;
    float volatile gain, lastGain;
    bool volatile playing, stopped;
    double sampleRate, sourceSampleRate;
    int blockSize, readAheadBufferSize;
    bool isPrepared, inputStreamEOF;

    AudioTransportSource (const AudioTransportSource&);
    const AudioTransportSource& operator= (const AudioTransportSource&);
};


#endif   // __JUCE_AUDIOTRANSPORTSOURCE_JUCEHEADER__