Initial community commit

Src/replicant/nsmp3dec/polyphase.h

@@ -0,0 +1,61 @@
+/***************************************************************************\
+ *
+*                    MPEG Layer3-Audio Decoder
+*                  © 1997-2006 by Fraunhofer IIS
+ *                        All Rights Reserved
+ *
+ *   filename: polyphase.h
+ *   project : ISO/MPEG-Decoder
+ *   author  : Stefan Gewinner
+ *   date    : 1998-05-26
+ *   contents/description: polyphase class - HEADER
+ *
+ *
+\***************************************************************************/
+
+/*
+ * $Date: 2011/02/14 14:48:56 $
+ * $Id: polyphase.h,v 1.6 2011/02/14 14:48:56 bigg Exp $
+ */
+
+#pragma once
+//#ifndef __POLYPHASE_H__
+//#define __POLYPHASE_H__
+
+/* ------------------------ includes --------------------------------------*/
+
+#include "mpeg.h"
+#include "foundation/align.h"
+/*-------------------------------------------------------------------------*/
+
+#define HAN_SIZE 512
+
+/*-------------------------------------------------------------------------*/
+
+// Class for (inverse) Polyphase calculation.
+
+class CPolyphase
+{
+
+public:
+
+  CPolyphase(const MPEG_INFO &_info);
+
+  ~CPolyphase() {}
+
+  void Init();
+  float *Apply(POLYSPECTRUM &sample, float *pPcm, int frms=18);
+	static void Reorder(int channels, POLYSPECTRUM &output, const SPECTRUM &input);
+protected:
+
+  int   bufOffset;
+	NALIGN(16) float syn_buf[2][HAN_SIZE];
+
+  const MPEG_INFO &info ;      // info-structure
+
+  void window_band_m(int bufOffset, float *out_samples) const;
+  void window_band_s(int bufOffset, float *out_samples) const;
+};
+
+/*-------------------------------------------------------------------------*/
+//#endif