73 lines
2.7 KiB
C
73 lines
2.7 KiB
C
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/*
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==============================================================================
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This file is part of the JUCE examples.
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Copyright (c) 2020 - Raw Material Software Limited
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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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THE SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES,
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WHETHER EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR
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PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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#pragma once
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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, (size_t) numberOfSamples * sizeof (float));
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}
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LiveScrollingAudioDisplay)
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};
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