\
/* Calculate magnitude in db */ \
for (i = 0; i < spectrum->bands; i++) { \
- gdouble val = (gdouble) freqdata[i].r * (gdouble) freqdata[i].r \
- + (gdouble) freqdata[i].i * (gdouble) freqdata[i].i; \
- val = sqrt (val); \
- val = 20.0 * log10 (val / max); \
+ gdouble val; \
+ val = (gdouble) freqdata[i].r * (gdouble) freqdata[i].r; \
+ val += (gdouble) freqdata[i].i * (gdouble) freqdata[i].i; \
+ val *= nfft; \
+ val /= max*max; \
+ val = 10.0 * log10 (val); \
if (val > spectrum->threshold) \
val -= spectrum->threshold; \
else \
\
/* Calculate magnitude in db */ \
for (i = 0; i < spectrum->bands; i++) { \
- gdouble val = freqdata[i].r * freqdata[i].r + freqdata[i].i * freqdata[i].i; \
- val = sqrt (val); \
- val = 20.0 * log10 (val / nfft); \
+ gdouble val; \
+ val = freqdata[i].r * freqdata[i].r; \
+ val += freqdata[i].i * freqdata[i].i; \
+ val /= nfft; \
+ val = 10.0 * log10 (val); \
if (val > spectrum->threshold) \
val -= spectrum->threshold; \
else \
#include <gst/gst.h>
#include <gtk/gtk.h>
-#define DEFAULT_AUDIOSINK "alsasink"
+#define DEFAULT_AUDIOSINK "autoaudiosink"
static GtkWidget *drawingarea = NULL;
static guint spect_height = 64;
bin = gst_pipeline_new ("bin");
src = gst_element_factory_make ("audiotestsrc", "src");
- g_object_set (G_OBJECT (src), "wave", 1, NULL);
+ g_object_set (G_OBJECT (src), "wave", 0, NULL);
spectrum = gst_element_factory_make ("spectrum", "spectrum");
g_object_set (G_OBJECT (spectrum), "bands", spect_bands, "threshold", -80,