juce_AudioTransportSource.h

Go to the documentation of this file.

/*
  ==============================================================================
 
   This file is part of the JUCE library.
   Copyright (c) 2015 - ROLI Ltd.
 
   Permission is granted to use this software under the terms of either:
   a) the GPL v2 (or any later version)
   b) the Affero GPL v3
 
   Details of these licenses can be found at: www.gnu.org/licenses
 
   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.
 
   ------------------------------------------------------------------------------
 
   To release a closed-source product which uses JUCE, commercial licenses are
   available: visit www.juce.com for more information.
 
  ==============================================================================
*/
 
#ifndef JUCE_AUDIOTRANSPORTSOURCE_H_INCLUDED
#define JUCE_AUDIOTRANSPORTSOURCE_H_INCLUDED
 
 
//==============================================================================
class JUCE_API  AudioTransportSource  : public PositionableAudioSource,
                                        public ChangeBroadcaster
{
public:
    //==============================================================================
    AudioTransportSource();
 
    ~AudioTransportSource();
 
    //==============================================================================
    void setSource (PositionableAudioSource* newSource,
                    int readAheadBufferSize = 0,
                    TimeSliceThread* readAheadThread = nullptr,
                    double sourceSampleRateToCorrectFor = 0.0,
                    int maxNumChannels = 2);
 
    //==============================================================================
    void setPosition (double newPosition);
 
    double getCurrentPosition() const;
 
    double getLengthInSeconds() const;
 
    bool hasStreamFinished() const noexcept             { return inputStreamEOF; }
 
    //==============================================================================
    void start();
 
    void stop();
 
    bool isPlaying() const noexcept     { return playing; }
 
    //==============================================================================
    void setGain (float newGain) noexcept;
 
    float getGain() const noexcept      { return gain; }
 
    //==============================================================================
    void prepareToPlay (int samplesPerBlockExpected, double sampleRate) override;
 
    void releaseResources() override;
 
    void getNextAudioBlock (const AudioSourceChannelInfo&) override;
 
    //==============================================================================
    void setNextReadPosition (int64 newPosition) override;
 
    int64 getNextReadPosition() const override;
 
    int64 getTotalLength() const override;
 
    bool isLooping() const override;
 
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 volatile isPrepared, inputStreamEOF;
 
    void releaseMasterResources();
 
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AudioTransportSource)
};
 
 
#endif   // JUCE_AUDIOTRANSPORTSOURCE_H_INCLUDED