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127 lines
5 KiB
C++
127 lines
5 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE 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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Wrapper class to continuously stream audio from an audio source to an
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AudioIODevice.
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This object acts as an AudioIODeviceCallback, so can be attached to an
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output device, and will stream audio from an AudioSource.
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@tags{Audio}
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*/
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class JUCE_API AudioSourcePlayer : public AudioIODeviceCallback
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{
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public:
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//==============================================================================
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/** Creates an empty AudioSourcePlayer. */
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AudioSourcePlayer();
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/** Destructor.
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Make sure this object isn't still being used by an AudioIODevice before
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deleting it!
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*/
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~AudioSourcePlayer() override;
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//==============================================================================
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/** Changes the current audio source to play from.
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If the source passed in is already being used, this method will do nothing.
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If the source is not null, its prepareToPlay() method will be called
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before it starts being used for playback.
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If there's another source currently playing, its releaseResources() method
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will be called after it has been swapped for the new one.
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@param newSource the new source to use - this will NOT be deleted
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by this object when no longer needed, so it's the
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caller's responsibility to manage it.
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*/
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void setSource (AudioSource* newSource);
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/** Returns the source that's playing.
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May return nullptr if there's no source.
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*/
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AudioSource* getCurrentSource() const noexcept { return source; }
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/** Sets a gain to apply to the audio data.
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@see getGain
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*/
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void setGain (float newGain) noexcept;
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/** Returns the current gain.
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@see setGain
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*/
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float getGain() const noexcept { return gain; }
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//==============================================================================
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/** Implementation of the AudioIODeviceCallbackWithContext method. */
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void audioDeviceIOCallbackWithContext (const float* const* inputChannelData,
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int totalNumInputChannels,
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float* const* outputChannelData,
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int totalNumOutputChannels,
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int numSamples,
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const AudioIODeviceCallbackContext& context) override;
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/** Implementation of the AudioIODeviceCallback method. */
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void audioDeviceAboutToStart (AudioIODevice* device) override;
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/** Implementation of the AudioIODeviceCallback method. */
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void audioDeviceStopped() override;
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/** An alternative method for initialising the source without an AudioIODevice. */
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void prepareToPlay (double sampleRate, int blockSize);
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private:
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//==============================================================================
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CriticalSection readLock;
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AudioSource* source = nullptr;
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double sampleRate = 0;
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int bufferSize = 0;
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float* channels[128];
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float* outputChans[128];
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const float* inputChans[128];
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AudioBuffer<float> tempBuffer;
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float lastGain = 1.0f;
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std::atomic<float> gain { 1.0f };
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AudioSourcePlayer)
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};
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} // namespace juce
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