Phase 1: Original Port Completed.

Recommended additions:
add and update (doxygen) documentation

1 files changed, 34 insertions, 0 deletions

diff --git a/Graphic_Equalizer_Original_Port/include/fft.hch b/Graphic_Equalizer_Original_Port/include/fft.hch
new file mode 100644
index 0000000..635ea7b
--- /dev/null
+++ b/Graphic_Equalizer_Original_Port/include/fft.hch
@@ -0,0 +1,34 @@
+#define NUMBER_OF_COLUMNS 	8

+#define NUMBER_OF_POINTS 	(1<<NUMBER_OF_COLUMNS)

+#define NUMBER_OF_FREQUENCIES 	(NUMBER_OF_POINTS>>1)

+

+#if HARDWARE_MULTIPLY

+/*

+ * This routine obtains the audio data from the audio I/O component and copies this  

+ * data to local arrays for calculating purposes, and calls the FFT algorithm.

+*/

+void perform_fft(signed 18 *pcm_audio);

+

+/* This routine calls the ifft algorithm and after completing that it obtains the 

+ * modified audio data and copies that to the output arrays of the audio I/O component. 

+ * Besides that it also fills the array used by the display routine for displaying the waveform.

+*/

+void perform_ifft(signed 18 *modified_audio ,unsigned 6 *ifft_info);

+#else

+/*

+ * This routine obtains the audio data from the audio I/O component and copies this  

+ * data to local arrays for calculating purposes, and calls the FFT algorithm.

+*/

+void perform_fft(signed 16 *pcm_audio);

+

+/* This routine calls the ifft algorithm and after completing that it obtains the 

+ * modified audio data and copies that to the output arrays of the audio I/O component. 

+ * Besides that it also fills the array used by the display routine for displaying the waveform.

+*/

+void perform_ifft(signed 16 *modified_audio ,unsigned 6 *ifft_info);

+#endif

+

+/* This routine equalizes the frequencies derived by the FFT calculation, 

+ * according to the settings of the equalizer bars.

+*/

+void equalize_audio(audiodata_t *audiodata);