100 lines
3.7 KiB
C++
100 lines
3.7 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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The code included in this file is provided under the terms of the ISC license
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http://www.isc.org/downloads/software-support-policy/isc-license. Permission
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To use, copy, modify, and/or distribute this software for any purpose with or
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without fee is hereby granted provided that the above copyright notice and
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this permission notice appear in all copies.
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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//==============================================================================
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/**
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An AudioSource that mixes together the output of a set of other AudioSources.
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Input sources can be added and removed while the mixer is running as long as their
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prepareToPlay() and releaseResources() methods are called before and after adding
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them to the mixer.
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@tags{Audio}
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*/
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class JUCE_API MixerAudioSource : public AudioSource
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{
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public:
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//==============================================================================
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/** Creates a MixerAudioSource. */
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MixerAudioSource();
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/** Destructor. */
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~MixerAudioSource();
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//==============================================================================
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/** Adds an input source to the mixer.
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If the mixer is running you'll need to make sure that the input source
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is ready to play by calling its prepareToPlay() method before adding it.
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If the mixer is stopped, then its input sources will be automatically
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prepared when the mixer's prepareToPlay() method is called.
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@param newInput the source to add to the mixer
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@param deleteWhenRemoved if true, then this source will be deleted when
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no longer needed by the mixer.
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*/
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void addInputSource (AudioSource* newInput, bool deleteWhenRemoved);
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/** Removes an input source.
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If the source was added by calling addInputSource() with the deleteWhenRemoved
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flag set, it will be deleted by this method.
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*/
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void removeInputSource (AudioSource* input);
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/** Removes all the input sources.
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Any sources which were added by calling addInputSource() with the deleteWhenRemoved
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flag set will be deleted by this method.
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*/
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void removeAllInputs();
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//==============================================================================
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/** Implementation of the AudioSource method.
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This will call prepareToPlay() on all its input sources.
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*/
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void prepareToPlay (int samplesPerBlockExpected, double sampleRate) override;
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/** Implementation of the AudioSource method.
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This will call releaseResources() on all its input sources.
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*/
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void releaseResources() override;
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/** Implementation of the AudioSource method. */
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void getNextAudioBlock (const AudioSourceChannelInfo&) override;
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private:
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//==============================================================================
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Array<AudioSource*> inputs;
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BigInteger inputsToDelete;
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CriticalSection lock;
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AudioBuffer<float> tempBuffer;
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double currentSampleRate;
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int bufferSizeExpected;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MixerAudioSource)
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};
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} // namespace juce
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