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/*
==============================================================================
This file is part of the JUCE framework examples.
Copyright (c) Raw Material Software Limited
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
to use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
==============================================================================
*/
#pragma once
//==============================================================================
/* This component scrolls a continuous waveform showing the audio that's
coming into whatever audio inputs this object is connected to.
*/
class LiveScrollingAudioDisplay final : public AudioVisualiserComponent,
public AudioIODeviceCallback
{
public:
LiveScrollingAudioDisplay() : AudioVisualiserComponent (1)
{
setSamplesPerBlock (256);
setBufferSize (1024);
}
//==============================================================================
void audioDeviceAboutToStart (AudioIODevice*) override
{
clear();
}
void audioDeviceStopped() override
{
clear();
}
void audioDeviceIOCallbackWithContext (const float* const* inputChannelData, int numInputChannels,
float* const* outputChannelData, int numOutputChannels,
int numberOfSamples, const AudioIODeviceCallbackContext& context) override
{
ignoreUnused (context);
for (int i = 0; i < numberOfSamples; ++i)
{
float inputSample = 0;
for (int chan = 0; chan < numInputChannels; ++chan)
if (const float* inputChannel = inputChannelData[chan])
inputSample += inputChannel[i]; // find the sum of all the channels
inputSample *= 10.0f; // boost the level to make it more easily visible.
pushSample (&inputSample, 1);
}
// We need to clear the output buffers before returning, in case they're full of junk..
for (int j = 0; j < numOutputChannels; ++j)
if (float* outputChannel = outputChannelData[j])
zeromem (outputChannel, (size_t) numberOfSamples * sizeof (float));
}
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LiveScrollingAudioDisplay)
};
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