From 3ef1ab02c6ed6fa6c8c21028836ef8fc7d3f04b2 Mon Sep 17 00:00:00 2001
From: jules <jules@rawmaterialsoftware.com>
Date: Wed, 11 Sep 2013 11:40:59 +0100
Subject: [PATCH] Added AudioSampleBuffer::reverse() method.

---
 .../buffers/juce_AudioSampleBuffer.cpp        | 36 ++++++++++---------
 .../buffers/juce_AudioSampleBuffer.h          | 18 +++++-----
 2 files changed, 29 insertions(+), 25 deletions(-)

diff --git a/modules/juce_audio_basics/buffers/juce_AudioSampleBuffer.cpp b/modules/juce_audio_basics/buffers/juce_AudioSampleBuffer.cpp
index 1dd3e3c28e..944140f71d 100644
--- a/modules/juce_audio_basics/buffers/juce_AudioSampleBuffer.cpp
+++ b/modules/juce_audio_basics/buffers/juce_AudioSampleBuffer.cpp
@@ -285,9 +285,7 @@ void AudioSampleBuffer::applyGainRamp (const int channel,
     }
 }
 
-void AudioSampleBuffer::applyGain (const int startSample,
-                                   const int numSamples,
-                                   const float gain) noexcept
+void AudioSampleBuffer::applyGain (int startSample, int numSamples, float gain) noexcept
 {
     for (int i = 0; i < numChannels; ++i)
         applyGain (i, startSample, numSamples, gain);
@@ -298,10 +296,8 @@ void AudioSampleBuffer::applyGain (const float gain) noexcept
     applyGain (0, size, gain);
 }
 
-void AudioSampleBuffer::applyGainRamp (const int startSample,
-                                       const int numSamples,
-                                       const float startGain,
-                                       const float endGain) noexcept
+void AudioSampleBuffer::applyGainRamp (int startSample, int numSamples,
+                                       float startGain, float endGain) noexcept
 {
     for (int i = 0; i < numChannels; ++i)
         applyGainRamp (i, startSample, numSamples, startGain, endGain);
@@ -399,11 +395,9 @@ void AudioSampleBuffer::copyFrom (const int destChannel,
     jassert (sourceStartSample >= 0 && sourceStartSample + numSamples <= source.size);
 
     if (numSamples > 0)
-    {
         FloatVectorOperations::copy (channels [destChannel] + destStartSample,
                                      source.channels [sourceChannel] + sourceStartSample,
                                      numSamples);
-    }
 }
 
 void AudioSampleBuffer::copyFrom (const int destChannel,
@@ -416,11 +410,7 @@ void AudioSampleBuffer::copyFrom (const int destChannel,
     jassert (source != nullptr);
 
     if (numSamples > 0)
-    {
-        FloatVectorOperations::copy (channels [destChannel] + destStartSample,
-                                     source,
-                                     numSamples);
-    }
+        FloatVectorOperations::copy (channels [destChannel] + destStartSample, source, numSamples);
 }
 
 void AudioSampleBuffer::copyFrom (const int destChannel,
@@ -482,6 +472,21 @@ void AudioSampleBuffer::copyFromWithRamp (const int destChannel,
     }
 }
 
+void AudioSampleBuffer::reverse (int channel, int startSample, int numSamples) const noexcept
+{
+    jassert (isPositiveAndBelow (channel, numChannels));
+    jassert (startSample >= 0 && startSample + numSamples <= size);
+
+    std::reverse (channels[channel] + startSample,
+                  channels[channel] + startSample + numSamples);
+}
+
+void AudioSampleBuffer::reverse (int startSample, int numSamples) const noexcept
+{
+    for (int i = 0; i < numChannels; ++i)
+        reverse (i, startSample, numSamples);
+}
+
 void AudioSampleBuffer::findMinMax (const int channel,
                                     const int startSample,
                                     int numSamples,
@@ -508,8 +513,7 @@ float AudioSampleBuffer::getMagnitude (const int channel,
     return jmax (mn, -mn, mx, -mx);
 }
 
-float AudioSampleBuffer::getMagnitude (const int startSample,
-                                       const int numSamples) const noexcept
+float AudioSampleBuffer::getMagnitude (int startSample, int numSamples) const noexcept
 {
     float mag = 0.0f;
 
diff --git a/modules/juce_audio_basics/buffers/juce_AudioSampleBuffer.h b/modules/juce_audio_basics/buffers/juce_AudioSampleBuffer.h
index bff2a0a7ce..cd71c3da2e 100644
--- a/modules/juce_audio_basics/buffers/juce_AudioSampleBuffer.h
+++ b/modules/juce_audio_basics/buffers/juce_AudioSampleBuffer.h
@@ -107,19 +107,16 @@ public:
 
     //==============================================================================
     /** Returns the number of channels of audio data that this buffer contains.
-
         @see getSampleData
     */
     int getNumChannels() const noexcept     { return numChannels; }
 
     /** Returns the number of samples allocated in each of the buffer's channels.
-
         @see getSampleData
     */
     int getNumSamples() const noexcept      { return size; }
 
     /** Returns a pointer one of the buffer's channels.
-
         For speed, this doesn't check whether the channel number is out of range,
         so be careful when using it!
     */
@@ -409,23 +406,26 @@ public:
                      float& minVal,
                      float& maxVal) const noexcept;
 
-    /** Finds the highest absolute sample value within a region of a channel.
-    */
+    /** Finds the highest absolute sample value within a region of a channel. */
     float getMagnitude (int channel,
                         int startSample,
                         int numSamples) const noexcept;
 
-    /** Finds the highest absolute sample value within a region on all channels.
-    */
+    /** Finds the highest absolute sample value within a region on all channels. */
     float getMagnitude (int startSample,
                         int numSamples) const noexcept;
 
-    /** Returns the root mean squared level for a region of a channel.
-    */
+    /** Returns the root mean squared level for a region of a channel. */
     float getRMSLevel (int channel,
                        int startSample,
                        int numSamples) const noexcept;
 
+    /** Reverses a part of a channel. */
+    void reverse (int channel, int startSample, int numSamples) const noexcept;
+
+    /** Reverses a part of the buffer. */
+    void reverse (int startSample, int numSamples) const noexcept;
+
 private:
     //==============================================================================
     int numChannels, size;