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authorGravatar Alexey Yakovenko <waker@users.sourceforge.net>2013-10-29 21:11:37 +0100
committerGravatar Alexey Yakovenko <waker@users.sourceforge.net>2013-10-29 21:11:37 +0100
commit87fc63d4b73bb977c0ebce1d560bd9b34b5f13d9 (patch)
tree886abdf22ac17b3b8fb21e847f51856916e52ad9 /fft.c
parent048fe67bef9965cb40712208e51f7f00df4e3b29 (diff)
use proper api for freq vis
Diffstat (limited to 'fft.c')
-rw-r--r--fft.c14
1 files changed, 7 insertions, 7 deletions
diff --git a/fft.c b/fft.c
index 7b6a3a75..59d36e91 100644
--- a/fft.c
+++ b/fft.c
@@ -27,9 +27,9 @@
#include <math.h>
#include <complex.h>
-static float hamming[DDB_AUDIO_MEMORY_FRAMES]; /* hamming window, scaled to sum to 1 */
-static int reversed[DDB_AUDIO_MEMORY_FRAMES]; /* bit-reversal table */
-static float complex roots[DDB_AUDIO_MEMORY_FRAMES / 2]; /* N-th roots of unity */
+static float hamming[DDB_FREQ_BANDS]; /* hamming window, scaled to sum to 1 */
+static int reversed[DDB_FREQ_BANDS]; /* bit-reversal table */
+static float complex roots[DDB_FREQ_BANDS / 2]; /* N-th roots of unity */
static int generated = 0;
static float LOGN; /* log N (base 2) */
@@ -59,7 +59,7 @@ static void generate_tables (void)
if (generated)
return;
- const int N = DDB_AUDIO_MEMORY_FRAMES;
+ const int N = DDB_FREQ_BANDS;
LOGN = log2(N);
for (int n = 0; n < N; n ++)
hamming[n] = 1 - 0.85 * cosf (2 * M_PI * n / N);
@@ -71,9 +71,9 @@ static void generate_tables (void)
generated = 1;
}
-static void do_fft (float complex a[DDB_AUDIO_MEMORY_FRAMES])
+static void do_fft (float complex a[DDB_FREQ_BANDS])
{
- const int N = DDB_AUDIO_MEMORY_FRAMES;
+ const int N = DDB_FREQ_BANDS;
int half = 1; /* (2^s)/2 */
int inv = N / 2; /* N/(2^s) */
@@ -104,7 +104,7 @@ calc_freq (float *data, float *freq) {
// fft code shamelessly stolen from audacious
// thanks, John
- int N = DDB_AUDIO_MEMORY_FRAMES;
+ int N = DDB_FREQ_BANDS;
float complex a[N];
for (int n = 0; n < N; n ++) {
a[reversed[n]] = data[n] * hamming[n];