KRDSP abstraction WIP

kraken/KRDSP_slow.cpp

@@ -0,0 +1,128 @@
+//
+//  KREngine.h
+//  KREngine
+//
+//  Copyright 2012 Kearwood Gilbert. All rights reserved.
+//  
+//  Redistribution and use in source and binary forms, with or without modification, are
+//  permitted provided that the following conditions are met:
+//  
+//  1. Redistributions of source code must retain the above copyright notice, this list of
+//  conditions and the following disclaimer.
+//  
+//  2. Redistributions in binary form must reproduce the above copyright notice, this list
+//  of conditions and the following disclaimer in the documentation and/or other materials
+//  provided with the distribution.
+//  
+//  THIS SOFTWARE IS PROVIDED BY KEARWOOD GILBERT ''AS IS'' AND ANY EXPRESS OR IMPLIED
+//  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+//  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KEARWOOD GILBERT OR
+//  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+//  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+//  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+//  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+//  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+//  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//  
+//  The views and conclusions contained in the software and documentation are those of the
+//  authors and should not be interpreted as representing official policies, either expressed
+//  or implied, of Kearwood Gilbert.
+//
+
+#include "KRDSP.h"
+
+#ifdef KRDSP_SLOW
+
+#include "KREngine-common.h"
+
+namespace KRDSP {
+
+FFTWorkspace::FFTWorkspace()
+{
+  sin_table = nullptr;
+  cos_table = nullptr;
+}
+
+FFTWorkspace::~FFTWorkspace()
+{
+  destroy();
+}
+
+void FFTWorkspace::create(size_t length)
+{
+  size_t size = (length / 2);
+  cos_table = new float[size];
+  sin_table = new float[size];
+  for (int i = 0; i < size / 2; i++) {
+    cos_table[i] = cos(2 * M_PI * i / length);
+    sin_table[i] = sin(2 * M_PI * i / length);
+  }
+}
+
+void FFTWorkspace::destroy()
+{
+  if (sin_table) {
+    delete sin_table;
+    sin_table = nullptr;
+  }
+  if (cos_table) {
+    delete cos_table;
+    cos_table = nullptr;
+  }
+}
+
+void FFTForward(const FFTWorkspace &workspace, SplitComplex *src, size_t count)
+{
+#error TODO - Implement
+}
+
+void FFTInverse(const FFTWorkspace &workspace, SplitComplex *src, size_t count)
+{
+#error TODO - Implement
+}
+
+void Int16ToFloat(const short *src, size_t srcStride, float *dest, size_t destStride, size_t count)
+{
+#error TODO - Implement
+}
+
+void Scale(float *buffer, float scale, size_t count)
+{
+#error TODO - Implement
+}
+
+void ScaleCopy(const float *src, float scale, float *dest, size_t count)
+{
+#error TODO - Implement
+}
+
+void ScaleCopy(const SplitComplex *src, float scale, SplitComplex *dest, size_t count)
+{
+  ScaleCopy(src->realp, scale, dest->realp, count);
+  ScaleCopy(src->imagp, scale, dest->imagp, count);
+}
+
+void ScaleRamp(float *buffer, float scaleStart, float scaleStep, size_t count)
+{
+#error TODO - Implement
+}
+
+void Accumulate(float *buffer, size_t bufferStride, const float *buffer2, size_t buffer2Stride, size_t count)
+{
+#error TODO - Implement
+}
+
+void Accumulate(SplitComplex *buffer, const SplitComplex *buffer2, size_t count)
+{
+#error TODO - Implement
+}
+
+
+void Multiply(const SplitComplex *a, const SplitComplex *b, SplitComplex *c, size_t count)
+{
+#error TODO - Implement
+}
+
+} // namespace KRDSP
+
+#endif // KRDSP_SLOW