first performance version

1 files changed, 33 insertions, 0 deletions

diff --git a/07_performance/src/fft.h b/07_performance/src/fft.h
new file mode 100644
index 0000000..bae5b37
--- /dev/null
+++ b/07_performance/src/fft.h
@@ -0,0 +1,33 @@
+
+#ifndef _FFT
+#define _FFT
+
+#ifndef M_PI
+#define	M_PI		3.14159265358979323846  /* pi */
+#endif
+
+
+class fft {
+	
+	public:
+			
+		fft();
+		~fft();	
+		
+		/* Calculate the power spectrum */
+		void powerSpectrum(int start, int half, float *data, int windowSize,float *magnitude,float *phase, float *power, float *avg_power);
+		/* ... the inverse */
+		void inversePowerSpectrum(int start, int half, int windowSize, float *finalOut,float *magnitude,float *phase);	
+		
+		void processLogXScale(const float * data,unsigned int insize, double fMax,
+						  float * avout, float * pkout, unsigned int outsize,
+						  float f1, float f2);	
+	
+	
+		float avout[15];
+		float pkout[15];
+		
+};
+	
+	
+#endif