74 lines
2.4 KiB
C++
74 lines
2.4 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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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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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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namespace juce
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{
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MemoryAudioSource::MemoryAudioSource (AudioBuffer<float>& bufferToUse, bool copyMemory, bool shouldLoop)
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: isLooping (shouldLoop)
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{
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if (copyMemory)
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buffer.makeCopyOf (bufferToUse);
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else
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buffer.setDataToReferTo (bufferToUse.getArrayOfWritePointers(),
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bufferToUse.getNumChannels(),
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bufferToUse.getNumSamples());
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}
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//==============================================================================
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void MemoryAudioSource::prepareToPlay (int /*samplesPerBlockExpected*/, double /*sampleRate*/)
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{
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position = 0;
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}
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void MemoryAudioSource::releaseResources() {}
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void MemoryAudioSource::getNextAudioBlock (const AudioSourceChannelInfo& bufferToFill)
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{
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auto& dst = *bufferToFill.buffer;
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auto channels = jmin (dst.getNumChannels(), buffer.getNumChannels());
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auto max = 0, pos = 0;
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auto n = buffer.getNumSamples(), m = bufferToFill.numSamples;
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int i;
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for (i = position; (i < n || isLooping) && (pos < m); i += max)
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{
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max = jmin (m - pos, n - (i % n));
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int ch = 0;
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for (; ch < channels; ++ch)
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dst.copyFrom (ch, bufferToFill.startSample + pos, buffer, ch, i % n, max);
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for (; ch < dst.getNumChannels(); ++ch)
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dst.clear (ch, bufferToFill.startSample + pos, max);
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pos += max;
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}
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if (pos < m)
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dst.clear (bufferToFill.startSample + pos, m - pos);
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position = (i % n);
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}
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} // namespace juce
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