git subrepo clone --branch=sono6good https://github.com/essej/JUCE.git deps/juce

subrepo:
  subdir:   "deps/juce"
  merged:   "b13f9084e"
upstream:
  origin:   "https://github.com/essej/JUCE.git"
  branch:   "sono6good"
  commit:   "b13f9084e"
git-subrepo:
  version:  "0.4.3"
  origin:   "https://github.com/ingydotnet/git-subrepo.git"
  commit:   "2f68596"

deps/juce/modules/juce_audio_devices/sources/juce_AudioSourcePlayer.cpp

@@ -0,0 +1,180 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2020 - Raw Material Software Limited
+
+   JUCE is an open source library subject to commercial or open-source
+   licensing.
+
+   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.
+
+   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
+   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
+   DISCLAIMED.
+
+  ==============================================================================
+*/
+
+namespace juce
+{
+
+AudioSourcePlayer::AudioSourcePlayer()
+{
+}
+
+AudioSourcePlayer::~AudioSourcePlayer()
+{
+    setSource (nullptr);
+}
+
+void AudioSourcePlayer::setSource (AudioSource* newSource)
+{
+    if (source != newSource)
+    {
+        auto* oldSource = source;
+
+        if (newSource != nullptr && bufferSize > 0 && sampleRate > 0)
+            newSource->prepareToPlay (bufferSize, sampleRate);
+
+        {
+            const ScopedLock sl (readLock);
+            source = newSource;
+        }
+
+        if (oldSource != nullptr)
+            oldSource->releaseResources();
+    }
+}
+
+void AudioSourcePlayer::setGain (const float newGain) noexcept
+{
+    gain = newGain;
+}
+
+void AudioSourcePlayer::audioDeviceIOCallback (const float** inputChannelData,
+                                               int totalNumInputChannels,
+                                               float** outputChannelData,
+                                               int totalNumOutputChannels,
+                                               int numSamples)
+{
+    // these should have been prepared by audioDeviceAboutToStart()...
+    jassert (sampleRate > 0 && bufferSize > 0);
+
+    const ScopedLock sl (readLock);
+
+    if (source != nullptr)
+    {
+        int numActiveChans = 0, numInputs = 0, numOutputs = 0;
+
+        // messy stuff needed to compact the channels down into an array
+        // of non-zero pointers..
+        for (int i = 0; i < totalNumInputChannels; ++i)
+        {
+            if (inputChannelData[i] != nullptr)
+            {
+                inputChans [numInputs++] = inputChannelData[i];
+                if (numInputs >= numElementsInArray (inputChans))
+                    break;
+            }
+        }
+
+        for (int i = 0; i < totalNumOutputChannels; ++i)
+        {
+            if (outputChannelData[i] != nullptr)
+            {
+                outputChans [numOutputs++] = outputChannelData[i];
+                if (numOutputs >= numElementsInArray (outputChans))
+                    break;
+            }
+        }
+
+        if (numInputs > numOutputs)
+        {
+            // if there aren't enough output channels for the number of
+            // inputs, we need to create some temporary extra ones (can't
+            // use the input data in case it gets written to)
+            tempBuffer.setSize (numInputs - numOutputs, numSamples,
+                                false, false, true);
+
+            for (int i = 0; i < numOutputs; ++i)
+            {
+                channels[numActiveChans] = outputChans[i];
+                memcpy (channels[numActiveChans], inputChans[i], (size_t) numSamples * sizeof (float));
+                ++numActiveChans;
+            }
+
+            for (int i = numOutputs; i < numInputs; ++i)
+            {
+                channels[numActiveChans] = tempBuffer.getWritePointer (i - numOutputs);
+                memcpy (channels[numActiveChans], inputChans[i], (size_t) numSamples * sizeof (float));
+                ++numActiveChans;
+            }
+        }
+        else
+        {
+            for (int i = 0; i < numInputs; ++i)
+            {
+                channels[numActiveChans] = outputChans[i];
+                memcpy (channels[numActiveChans], inputChans[i], (size_t) numSamples * sizeof (float));
+                ++numActiveChans;
+            }
+
+            for (int i = numInputs; i < numOutputs; ++i)
+            {
+                channels[numActiveChans] = outputChans[i];
+                zeromem (channels[numActiveChans], (size_t) numSamples * sizeof (float));
+                ++numActiveChans;
+            }
+        }
+
+        AudioBuffer<float> buffer (channels, numActiveChans, numSamples);
+
+        AudioSourceChannelInfo info (&buffer, 0, numSamples);
+        source->getNextAudioBlock (info);
+
+        for (int i = info.buffer->getNumChannels(); --i >= 0;)
+            buffer.applyGainRamp (i, info.startSample, info.numSamples, lastGain, gain);
+
+        lastGain = gain;
+    }
+    else
+    {
+        for (int i = 0; i < totalNumOutputChannels; ++i)
+            if (outputChannelData[i] != nullptr)
+                zeromem (outputChannelData[i], (size_t) numSamples * sizeof (float));
+    }
+}
+
+void AudioSourcePlayer::audioDeviceAboutToStart (AudioIODevice* device)
+{
+    prepareToPlay (device->getCurrentSampleRate(),
+                   device->getCurrentBufferSizeSamples());
+}
+
+void AudioSourcePlayer::prepareToPlay (double newSampleRate, int newBufferSize)
+{
+    sampleRate = newSampleRate;
+    bufferSize = newBufferSize;
+    zeromem (channels, sizeof (channels));
+
+    if (source != nullptr)
+        source->prepareToPlay (bufferSize, sampleRate);
+}
+
+void AudioSourcePlayer::audioDeviceStopped()
+{
+    if (source != nullptr)
+        source->releaseResources();
+
+    sampleRate = 0.0;
+    bufferSize = 0;
+
+    tempBuffer.setSize (2, 8);
+}
+
+} // namespace juce