- port to minGw

git-svn-id: http://moon:8086/svn/software/trunk/projects/JaySynth@235 b431acfa-c32f-4a4a-93f1-934dc6c82436
2015-02-21 17:09:43 +00:00
parent 843c6e300c
commit cfc9645b0b
1093 changed files with 426078 additions and 143 deletions
@@ -0,0 +1,94 @@
+/*
+  ==============================================================================
+
+   This file is part of the JUCE library.
+   Copyright (c) 2013 - Raw Material Software Ltd.
+
+   Permission is granted to use this software under the terms of either:
+   a) the GPL v2 (or any later version)
+   b) the Affero GPL v3
+
+   Details of these licenses can be found at: www.gnu.org/licenses
+
+   JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
+   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+   ------------------------------------------------------------------------------
+
+   To release a closed-source product which uses JUCE, commercial licenses are
+   available: visit www.juce.com for more information.
+
+  ==============================================================================
+*/
+
+#ifndef JUCE_LAGRANGEINTERPOLATOR_H_INCLUDED
+#define JUCE_LAGRANGEINTERPOLATOR_H_INCLUDED
+
+
+//==============================================================================
+/**
+    Interpolator for resampling a stream of floats using 4-point lagrange interpolation.
+
+    Note that the resampler is stateful, so when there's a break in the continuity
+    of the input stream you're feeding it, you should call reset() before feeding
+    it any new data. And like with any other stateful filter, if you're resampling
+    multiple channels, make sure each one uses its own LagrangeInterpolator
+    object.
+*/
+class JUCE_API  LagrangeInterpolator
+{
+public:
+    LagrangeInterpolator();
+    ~LagrangeInterpolator();
+
+    /** Resets the state of the interpolator.
+        Call this when there's a break in the continuity of the input data stream.
+    */
+    void reset() noexcept;
+
+    /** Resamples a stream of samples.
+
+        @param speedRatio       the number of input samples to use for each output sample
+        @param inputSamples     the source data to read from. This must contain at
+                                least (speedRatio * numOutputSamplesToProduce) samples.
+        @param outputSamples    the buffer to write the results into
+        @param numOutputSamplesToProduce    the number of output samples that should be created
+
+        @returns the actual number of input samples that were used
+    */
+    int process (double speedRatio,
+                 const float* inputSamples,
+                 float* outputSamples,
+                 int numOutputSamplesToProduce) noexcept;
+
+    /** Resamples a stream of samples, adding the results to the output data
+        with a gain.
+
+        @param speedRatio       the number of input samples to use for each output sample
+        @param inputSamples     the source data to read from. This must contain at
+                                least (speedRatio * numOutputSamplesToProduce) samples.
+        @param outputSamples    the buffer to write the results to - the result values will be added
+                                to any pre-existing data in this buffer after being multiplied by
+                                the gain factor
+        @param numOutputSamplesToProduce    the number of output samples that should be created
+        @param gain             a gain factor to multiply the resulting samples by before
+                                adding them to the destination buffer
+
+        @returns the actual number of input samples that were used
+     */
+    int processAdding (double speedRatio,
+                       const float* inputSamples,
+                       float* outputSamples,
+                       int numOutputSamplesToProduce,
+                       float gain) noexcept;
+
+private:
+    float lastInputSamples[5];
+    double subSamplePos;
+
+    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (LagrangeInterpolator)
+};
+
+
+#endif   // JUCE_LAGRANGEINTERPOLATOR_H_INCLUDED