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https://github.com/juce-framework/JUCE.git
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81 lines
2.8 KiB
C++
81 lines
2.8 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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By using JUCE, you agree to the terms of both the JUCE 5 End-User License
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Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
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27th April 2017).
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End User License Agreement: www.juce.com/juce-5-licence
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Privacy Policy: www.juce.com/juce-5-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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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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#pragma once
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#include "../JuceDemoHeader.h"
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//==============================================================================
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/* This component scrolls a continuous waveform showing the audio that's
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coming into whatever audio inputs this object is connected to.
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*/
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class LiveScrollingAudioDisplay : public AudioVisualiserComponent,
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public AudioIODeviceCallback
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{
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public:
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LiveScrollingAudioDisplay() : AudioVisualiserComponent (1)
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{
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setSamplesPerBlock (256);
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setBufferSize (1024);
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}
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//==============================================================================
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void audioDeviceAboutToStart (AudioIODevice*) override
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{
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clear();
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}
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void audioDeviceStopped() override
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{
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clear();
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}
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void audioDeviceIOCallback (const float** inputChannelData, int numInputChannels,
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float** outputChannelData, int numOutputChannels,
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int numberOfSamples) override
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{
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for (int i = 0; i < numberOfSamples; ++i)
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{
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float inputSample = 0;
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for (int chan = 0; chan < numInputChannels; ++chan)
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if (const float* inputChannel = inputChannelData[chan])
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inputSample += inputChannel[i]; // find the sum of all the channels
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inputSample *= 10.0f; // boost the level to make it more easily visible.
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pushSample (&inputSample, 1);
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}
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// We need to clear the output buffers before returning, in case they're full of junk..
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for (int j = 0; j < numOutputChannels; ++j)
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if (float* outputChannel = outputChannelData[j])
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zeromem (outputChannel, sizeof (float) * (size_t) numberOfSamples);
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}
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LiveScrollingAudioDisplay)
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};
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