Added the JUCE DSP module

modules/juce_audio_basics/sources/juce_MemoryAudioSource.cpp

@@ -0,0 +1,66 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2017 - ROLI Ltd.
+
+   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.
+
+  ==============================================================================
+*/
+
+//==============================================================================
+MemoryAudioSource::MemoryAudioSource (AudioBuffer<float>& bufferToUse, bool copyMemory, bool shouldLoop)
+    : isLooping (shouldLoop)
+{
+    if (copyMemory)
+        buffer.makeCopyOf (bufferToUse);
+    else
+        buffer.setDataToReferTo (bufferToUse.getArrayOfWritePointers(),
+                                 bufferToUse.getNumChannels(),
+                                 bufferToUse.getNumSamples());
+}
+
+//==============================================================================
+void MemoryAudioSource::prepareToPlay (int /*samplesPerBlockExpected*/, double /*sampleRate*/)
+{
+    position = 0;
+}
+
+void MemoryAudioSource::releaseResources()   {}
+
+void MemoryAudioSource::getNextAudioBlock (const AudioSourceChannelInfo& bufferToFill)
+{
+    auto& dst = *bufferToFill.buffer;
+    auto channels = jmin (dst.getNumChannels(), buffer.getNumChannels());
+    auto max = 0, pos = 0;
+    auto n = buffer.getNumSamples(), m = bufferToFill.numSamples;
+
+    for (auto i = position; (i < n || isLooping) && (pos < m); i += max)
+    {
+        max = jmin (m - pos, n - (i % n));
+
+        int ch = 0;
+        for (; ch < channels; ++ch)
+            dst.copyFrom (ch, bufferToFill.startSample + pos, buffer, ch, i % n, max);
+
+        for (; ch < dst.getNumChannels(); ++ch)
+            dst.clear (ch, bufferToFill.startSample + pos, max);
+
+        pos += max;
+    }
+
+    if (pos < m)
+        dst.clear (bufferToFill.startSample + pos, m - pos);
+}

modules/juce_audio_basics/sources/juce_MemoryAudioSource.h

@@ -0,0 +1,61 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2017 - ROLI Ltd.
+
+   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.
+
+  ==============================================================================
+*/
+
+#pragma once
+
+
+//==============================================================================
+/**
+    An AudioSource which takes some float audio data as an input.
+*/
+class JUCE_API MemoryAudioSource   : public AudioSource
+{
+public:
+    //==============================================================================
+    /**  Creates a MemoryAudioSource by providing an audio buffer.
+
+         If copyMemory is true then the buffer will be copied into an internal
+         buffer which will be owned by the MemoryAudioSource. If copyMemory is
+         false, then you must ensure that the lifetime of the audio buffer is
+         at least as long as the MemoryAudioSource.
+    */
+    MemoryAudioSource (AudioBuffer<float>& audioBuffer, bool copyMemory, bool shouldLoop = false);
+
+    //==============================================================================
+    /** Implementation of the AudioSource method. */
+    void prepareToPlay (int samplesPerBlockExpected, double sampleRate) override;
+
+    /** Implementation of the AudioSource method. */
+    void releaseResources() override;
+
+    /** Implementation of the AudioSource method. */
+    void getNextAudioBlock (const AudioSourceChannelInfo& bufferToFill) override;
+
+private:
+    //==============================================================================
+    AudioBuffer<float> buffer;
+    int position = 0;
+    bool isLooping;
+
+    //==============================================================================
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MemoryAudioSource)
+};