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-rw-r--r--gst/spectrum/gstspectrum.c157
1 files changed, 79 insertions, 78 deletions
diff --git a/gst/spectrum/gstspectrum.c b/gst/spectrum/gstspectrum.c
index 920d69ee..aa309f1c 100644
--- a/gst/spectrum/gstspectrum.c
+++ b/gst/spectrum/gstspectrum.c
@@ -25,40 +25,44 @@
#include "gstspectrum.h"
/* elementfactory information */
-static GstElementDetails gst_spectrum_details = GST_ELEMENT_DETAILS (
- "Spectrum analyzer",
- "Filter/Analyzer/Audio",
- "Run an FFT on the audio signal, output spectrum data",
- "Erik Walthinsen <omega@cse.ogi.edu>"
-);
+static GstElementDetails gst_spectrum_details =
+GST_ELEMENT_DETAILS ("Spectrum analyzer",
+ "Filter/Analyzer/Audio",
+ "Run an FFT on the audio signal, output spectrum data",
+ "Erik Walthinsen <omega@cse.ogi.edu>");
/* Spectrum signals and args */
-enum {
+enum
+{
/* FILL ME */
LAST_SIGNAL
};
-enum {
+enum
+{
ARG_0,
ARG_WIDTH,
};
-static void gst_spectrum_base_init (gpointer g_class);
-static void gst_spectrum_class_init (GstSpectrumClass *klass);
-static void gst_spectrum_init (GstSpectrum *spectrum);
+static void gst_spectrum_base_init (gpointer g_class);
+static void gst_spectrum_class_init (GstSpectrumClass * klass);
+static void gst_spectrum_init (GstSpectrum * spectrum);
-static void gst_spectrum_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
+static void gst_spectrum_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec);
-static void gst_spectrum_chain (GstPad *pad, GstData *_data);
+static void gst_spectrum_chain (GstPad * pad, GstData * _data);
#define fixed short
-int gst_spectrum_fix_fft(fixed fr[], fixed fi[], int m, int inverse);
-void gst_spectrum_fix_loud(fixed loud[], fixed fr[], fixed fi[], int n, int scale_shift);
-void gst_spectrum_window(fixed fr[], int n);
+int gst_spectrum_fix_fft (fixed fr[], fixed fi[], int m, int inverse);
+void gst_spectrum_fix_loud (fixed loud[], fixed fr[], fixed fi[], int n,
+ int scale_shift);
+void gst_spectrum_window (fixed fr[], int n);
static GstElementClass *parent_class = NULL;
+
/*static guint gst_spectrum_signals[LAST_SIGNAL] = { 0 }; */
GType
@@ -68,17 +72,19 @@ gst_spectrum_get_type (void)
if (!spectrum_type) {
static const GTypeInfo spectrum_info = {
- sizeof(GstSpectrumClass),
+ sizeof (GstSpectrumClass),
gst_spectrum_base_init,
NULL,
- (GClassInitFunc)gst_spectrum_class_init,
+ (GClassInitFunc) gst_spectrum_class_init,
NULL,
NULL,
- sizeof(GstSpectrum),
+ sizeof (GstSpectrum),
0,
- (GInstanceInitFunc)gst_spectrum_init,
+ (GInstanceInitFunc) gst_spectrum_init,
};
- spectrum_type = g_type_register_static(GST_TYPE_ELEMENT, "GstSpectrum", &spectrum_info, 0);
+ spectrum_type =
+ g_type_register_static (GST_TYPE_ELEMENT, "GstSpectrum", &spectrum_info,
+ 0);
}
return spectrum_type;
}
@@ -91,41 +97,40 @@ gst_spectrum_base_init (gpointer g_class)
gst_element_class_set_details (element_class, &gst_spectrum_details);
}
static void
-gst_spectrum_class_init (GstSpectrumClass *klass)
+gst_spectrum_class_init (GstSpectrumClass * klass)
{
GObjectClass *gobject_class;
- gobject_class = (GObjectClass*)klass;
+ gobject_class = (GObjectClass *) klass;
- parent_class = g_type_class_ref(GST_TYPE_ELEMENT);
+ parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
- g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_WIDTH,
- g_param_spec_int("width","width","width",
- G_MININT,G_MAXINT,0,G_PARAM_WRITABLE)); /* CHECKME */
+ g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_WIDTH, g_param_spec_int ("width", "width", "width", G_MININT, G_MAXINT, 0, G_PARAM_WRITABLE)); /* CHECKME */
gobject_class->set_property = gst_spectrum_set_property;
}
static void
-gst_spectrum_init (GstSpectrum *spectrum)
+gst_spectrum_init (GstSpectrum * spectrum)
{
- spectrum->sinkpad = gst_pad_new("sink",GST_PAD_SINK);
- gst_element_add_pad(GST_ELEMENT(spectrum),spectrum->sinkpad);
- gst_pad_set_chain_function(spectrum->sinkpad,gst_spectrum_chain);
- spectrum->srcpad = gst_pad_new("src",GST_PAD_SRC);
- gst_element_add_pad(GST_ELEMENT(spectrum),spectrum->srcpad);
+ spectrum->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
+ gst_element_add_pad (GST_ELEMENT (spectrum), spectrum->sinkpad);
+ gst_pad_set_chain_function (spectrum->sinkpad, gst_spectrum_chain);
+ spectrum->srcpad = gst_pad_new ("src", GST_PAD_SRC);
+ gst_element_add_pad (GST_ELEMENT (spectrum), spectrum->srcpad);
spectrum->width = 75;
}
static void
-gst_spectrum_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
+gst_spectrum_set_property (GObject * object, guint prop_id,
+ const GValue * value, GParamSpec * pspec)
{
GstSpectrum *spectrum;
/* it's not null if we got it, but it might not be ours */
- g_return_if_fail(GST_IS_SPECTRUM(object));
- spectrum = GST_SPECTRUM(object);
+ g_return_if_fail (GST_IS_SPECTRUM (object));
+ spectrum = GST_SPECTRUM (object);
switch (prop_id) {
case ARG_WIDTH:
@@ -137,48 +142,49 @@ gst_spectrum_set_property (GObject *object, guint prop_id, const GValue *value,
}
static void
-gst_spectrum_chain (GstPad *pad, GstData *_data)
+gst_spectrum_chain (GstPad * pad, GstData * _data)
{
GstBuffer *buf = GST_BUFFER (_data);
GstSpectrum *spectrum;
gint spec_base, spec_len;
gint16 *re, *im, *loud;
gint16 *samples;
- gint step,pos,i;
+ gint step, pos, i;
guchar *spect;
GstBuffer *newbuf;
- g_return_if_fail(pad != NULL);
- g_return_if_fail(GST_IS_PAD(pad));
- g_return_if_fail(buf != NULL);
+ g_return_if_fail (pad != NULL);
+ g_return_if_fail (GST_IS_PAD (pad));
+ g_return_if_fail (buf != NULL);
spectrum = GST_SPECTRUM (GST_OBJECT_PARENT (pad));
- samples = (gint16 *)GST_BUFFER_DATA(buf);
+ samples = (gint16 *) GST_BUFFER_DATA (buf);
spec_base = 8;
spec_len = 1024;
- im = g_malloc(spec_len * sizeof(gint16));
- g_return_if_fail(im != NULL);
- loud = g_malloc(spec_len * sizeof(gint16));
- g_return_if_fail(loud != NULL);
+ im = g_malloc (spec_len * sizeof (gint16));
+ g_return_if_fail (im != NULL);
+ loud = g_malloc (spec_len * sizeof (gint16));
+ g_return_if_fail (loud != NULL);
- memset(im,0,spec_len * sizeof(gint16));
+ memset (im, 0, spec_len * sizeof (gint16));
/*if (spectrum->meta->channels == 2) { */
- re = g_malloc(spec_len * sizeof(gint16));
- for (i=0;i<spec_len;i++)
- re[i] = (samples[(i*2)] + samples[(i*2)+1]) >> 1;
+ re = g_malloc (spec_len * sizeof (gint16));
+ for (i = 0; i < spec_len; i++)
+ re[i] = (samples[(i * 2)] + samples[(i * 2) + 1]) >> 1;
/*} else */
/* re = samples; */
- gst_spectrum_window(re,spec_len);
- gst_spectrum_fix_fft(re,im,spec_base,FALSE);
- gst_spectrum_fix_loud(loud,re,im,spec_len,0);
- if (re != samples) g_free(re);
- g_free(im);
- step = spec_len / (spectrum->width*2);
- spect = (guchar *)g_malloc(spectrum->width);
- for (i=0,pos=0;i<spectrum->width;i++,pos += step) {
+ gst_spectrum_window (re, spec_len);
+ gst_spectrum_fix_fft (re, im, spec_base, FALSE);
+ gst_spectrum_fix_loud (loud, re, im, spec_len, 0);
+ if (re != samples)
+ g_free (re);
+ g_free (im);
+ step = spec_len / (spectrum->width * 2);
+ spect = (guchar *) g_malloc (spectrum->width);
+ for (i = 0, pos = 0; i < spectrum->width; i++, pos += step) {
if (loud[pos] > -60)
spect[i] = (loud[pos] + 60) / 2;
else
@@ -186,32 +192,27 @@ gst_spectrum_chain (GstPad *pad, GstData *_data)
/* if (spect[i] > 15); */
/* spect[i] = 15; */
}
- g_free(loud);
- gst_buffer_unref(buf);
+ g_free (loud);
+ gst_buffer_unref (buf);
/* g_free(samples); */
- newbuf = gst_buffer_new();
- g_return_if_fail(newbuf != NULL);
- GST_BUFFER_DATA(newbuf) = spect;
- GST_BUFFER_SIZE(newbuf) = spectrum->width;
+ newbuf = gst_buffer_new ();
+ g_return_if_fail (newbuf != NULL);
+ GST_BUFFER_DATA (newbuf) = spect;
+ GST_BUFFER_SIZE (newbuf) = spectrum->width;
- gst_pad_push(spectrum->srcpad,GST_DATA (newbuf));
+ gst_pad_push (spectrum->srcpad, GST_DATA (newbuf));
}
static gboolean
-plugin_init (GstPlugin *plugin)
+plugin_init (GstPlugin * plugin)
{
- return gst_element_register (plugin, "spectrum", GST_RANK_NONE, GST_TYPE_SPECTRUM);
+ return gst_element_register (plugin, "spectrum", GST_RANK_NONE,
+ GST_TYPE_SPECTRUM);
}
-GST_PLUGIN_DEFINE (
- GST_VERSION_MAJOR,
- GST_VERSION_MINOR,
- "spectrum",
- "Run an FFT on the audio signal, output spectrum data",
- plugin_init,
- VERSION,
- GST_LICENSE,
- GST_PACKAGE,
- GST_ORIGIN
-)
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+ GST_VERSION_MINOR,
+ "spectrum",
+ "Run an FFT on the audio signal, output spectrum data",
+ plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-28 16:44:25 +0000