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https://github.com/juce-framework/JUCE.git
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83 lines
2.9 KiB
C++
83 lines
2.9 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2015 - ROLI Ltd.
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Permission is granted to use this software under the terms of either:
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a) the GPL v2 (or any later version)
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b) the Affero GPL v3
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Details of these licenses can be found at: www.gnu.org/licenses
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JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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------------------------------------------------------------------------------
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To release a closed-source product which uses JUCE, commercial licenses are
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available: visit www.juce.com for more information.
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==============================================================================
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*/
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#ifndef __AUDIOLIVESCROLLINGDISPLAY_H_4C3BD3A7__
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#define __AUDIOLIVESCROLLINGDISPLAY_H_4C3BD3A7__
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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 numSamples) override
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{
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for (int i = 0; i < numSamples; ++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) numSamples);
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}
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LiveScrollingAudioDisplay)
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};
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#endif // __AUDIOLIVESCROLLINGDISPLAY_H_4C3BD3A7__
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