1 files changed, 92 insertions, 0 deletions
diff --git a/media/libsoundtouch/src/InterpolateLinear.h b/media/libsoundtouch/src/InterpolateLinear.h
new file mode 100644
index 000000000..b76299f88
--- /dev/null
+++ b/media/libsoundtouch/src/InterpolateLinear.h
@@ -0,0 +1,92 @@
+////////////////////////////////////////////////////////////////////////////////
+/// 
+/// Linear interpolation routine.
+///
+/// Author        : Copyright (c) Olli Parviainen
+/// Author e-mail : oparviai 'at' iki.fi
+/// SoundTouch WWW: http://www.surina.net/soundtouch
+///
+////////////////////////////////////////////////////////////////////////////////
+//
+// $Id: InterpolateLinear.h 179 2014-01-06 18:41:42Z oparviai $
+//
+////////////////////////////////////////////////////////////////////////////////
+//
+// License :
+//
+//  SoundTouch audio processing library
+//  Copyright (c) Olli Parviainen
+//
+//  This library is free software; you can redistribute it and/or
+//  modify it under the terms of the GNU Lesser General Public
+//  License as published by the Free Software Foundation; either
+//  version 2.1 of the License, or (at your option) any later version.
+//
+//  This library 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
+//  Lesser General Public License for more details.
+//
+//  You should have received a copy of the GNU Lesser General Public
+//  License along with this library; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#ifndef _InterpolateLinear_H_
+#define _InterpolateLinear_H_
+
+#include "RateTransposer.h"
+#include "STTypes.h"
+
+namespace soundtouch
+{
+
+/// Linear transposer class that uses integer arithmetics
+class InterpolateLinearInteger : public TransposerBase
+{
+protected:
+    int iFract;
+    int iRate;
+
+    virtual void resetRegisters();
+
+    virtual int transposeMono(SAMPLETYPE *dest, 
+                       const SAMPLETYPE *src, 
+                       int &srcSamples);
+    virtual int transposeStereo(SAMPLETYPE *dest, 
+                         const SAMPLETYPE *src, 
+                         int &srcSamples);
+    virtual int transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples);
+public:
+    InterpolateLinearInteger();
+
+    /// Sets new target rate. Normal rate = 1.0, smaller values represent slower 
+    /// rate, larger faster rates.
+    virtual void setRate(float newRate);
+};
+
+
+/// Linear transposer class that uses floating point arithmetics
+class InterpolateLinearFloat : public TransposerBase
+{
+protected:
+    float fract;
+
+    virtual void resetRegisters();
+
+    virtual int transposeMono(SAMPLETYPE *dest, 
+                       const SAMPLETYPE *src, 
+                       int &srcSamples);
+    virtual int transposeStereo(SAMPLETYPE *dest, 
+                         const SAMPLETYPE *src, 
+                         int &srcSamples);
+    virtual int transposeMulti(SAMPLETYPE *dest, const SAMPLETYPE *src, int &srcSamples);
+
+public:
+    InterpolateLinearFloat();
+};
+
+}
+
+#endif