* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
+/* TODO: add wave selection */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
+#include <stdio.h>
+#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <gst/gst.h>
#include <gtk/gtk.h>
-#define DEFAULT_AUDIOSINK "alsasink"
-#define SPECT_BANDS 256
+#ifndef DEFAULT_AUDIOSINK
+#define DEFAULT_AUDIOSINK "autoaudiosink"
+#endif
+
+static guint spect_height = 64;
+static guint spect_bands = 256;
+static gfloat height_scale = 1.0;
static GtkWidget *drawingarea = NULL;
+static GstClock *sync_clock = NULL;
static void
on_window_destroy (GtkObject * object, gpointer user_data)
g_object_set (machine, "freq", value, NULL);
}
+static gboolean
+on_configure_event (GtkWidget * widget, GdkEventConfigure * event,
+ gpointer user_data)
+{
+ GstElement *spectrum = GST_ELEMENT (user_data);
+
+ /*GST_INFO ("%d x %d", event->width, event->height); */
+ spect_height = event->height;
+ height_scale = event->height / 64.0;
+ spect_bands = event->width;
+
+ g_object_set (G_OBJECT (spectrum), "bands", spect_bands, NULL);
+ return FALSE;
+}
+
/* draw frequency spectrum as a bunch of bars */
static void
-draw_spectrum (guchar * data)
+draw_spectrum (gfloat * data)
{
gint i;
- GdkRectangle rect = { 0, 0, SPECT_BANDS, 50 };
+ GdkRectangle rect = { 0, 0, spect_bands, spect_height };
if (!drawingarea)
return;
gdk_window_begin_paint_rect (drawingarea->window, &rect);
gdk_draw_rectangle (drawingarea->window, drawingarea->style->black_gc,
- TRUE, 0, 0, SPECT_BANDS, 50);
- for (i = 0; i < SPECT_BANDS; i++) {
+ TRUE, 0, 0, spect_bands, spect_height);
+ for (i = 0; i < spect_bands; i++) {
gdk_draw_rectangle (drawingarea->window, drawingarea->style->white_gc,
- TRUE, i, 64 - data[i], 1, data[i]);
+ TRUE, i, -data[i], 1, spect_height + data[i]);
}
gdk_window_end_paint (drawingarea->window);
}
+/* process delayed message */
+static gboolean
+delayed_idle_spectrum_update (gpointer user_data)
+{
+ draw_spectrum ((gfloat *) user_data);
+ g_free (user_data);
+ return (FALSE);
+}
+
+static gboolean
+delayed_spectrum_update (GstClock * sync_clock, GstClockTime time,
+ GstClockID id, gpointer user_data)
+{
+ if (GST_CLOCK_TIME_IS_VALID (time))
+ g_idle_add (delayed_idle_spectrum_update, user_data);
+ else
+ g_free (user_data);
+ return (TRUE);
+}
+
/* receive spectral data from element message */
-gboolean
+static gboolean
message_handler (GstBus * bus, GstMessage * message, gpointer data)
{
if (message->type == GST_MESSAGE_ELEMENT) {
const gchar *name = gst_structure_get_name (s);
if (strcmp (name, "spectrum") == 0) {
- guchar spect[SPECT_BANDS];
- const GValue *list;
- const GValue *value;
- guint i;
-
- list = gst_structure_get_value (s, "spectrum");
- for (i = 0; i < SPECT_BANDS; ++i) {
- value = gst_value_list_get_value (list, i);
- spect[i] = g_value_get_uchar (value);
+ GstElement *spectrum = GST_ELEMENT (GST_MESSAGE_SRC (message));
+ GstClockTime timestamp, duration;
+ GstClockTime waittime = GST_CLOCK_TIME_NONE;
+
+ if (gst_structure_get_clock_time (s, "running-time", ×tamp) &&
+ gst_structure_get_clock_time (s, "duration", &duration)) {
+ /* wait for middle of buffer */
+ waittime = timestamp + duration / 2;
+ } else if (gst_structure_get_clock_time (s, "endtime", ×tamp)) {
+ waittime = timestamp;
+ }
+ if (GST_CLOCK_TIME_IS_VALID (waittime)) {
+ GstClockID clock_id;
+ GstClockTime basetime = gst_element_get_base_time (spectrum);
+ gfloat *spect = g_new (gfloat, spect_bands);
+ const GValue *list;
+ const GValue *value;
+ guint i;
+
+ list = gst_structure_get_value (s, "magnitude");
+ for (i = 0; i < spect_bands; ++i) {
+ value = gst_value_list_get_value (list, i);
+ spect[i] = height_scale * g_value_get_float (value);
+ }
+
+ clock_id =
+ gst_clock_new_single_shot_id (sync_clock, waittime + basetime);
+ gst_clock_id_wait_async (clock_id, delayed_spectrum_update,
+ (gpointer) spect);
+ gst_clock_id_unref (clock_id);
}
- draw_spectrum (spect);
}
}
return TRUE;
main (int argc, char *argv[])
{
GstElement *bin;
- GstElement *src, *spectrum, *sink;
+ GstElement *src, *spectrum, *audioconvert, *sink;
GstBus *bus;
GtkWidget *appwindow, *vbox, *widget;
bin = gst_pipeline_new ("bin");
src = gst_element_factory_make ("audiotestsrc", "src");
- /*
- g_object_set (G_OBJECT (src), "wave", 0, 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,
+ g_object_set (G_OBJECT (spectrum), "bands", spect_bands, "threshold", -80,
"message", TRUE, NULL);
+ audioconvert = gst_element_factory_make ("audioconvert", "audioconvert");
+
sink = gst_element_factory_make (DEFAULT_AUDIOSINK, "sink");
- gst_bin_add_many (GST_BIN (bin), src, spectrum, sink, NULL);
- if (!gst_element_link_many (src, spectrum, sink, NULL)) {
- fprintf (stderr, "cant link elements\n");
+ gst_bin_add_many (GST_BIN (bin), src, spectrum, audioconvert, sink, NULL);
+ if (!gst_element_link_many (src, spectrum, audioconvert, sink, NULL)) {
+ fprintf (stderr, "can't link elements\n");
exit (1);
}
gst_bus_add_watch (bus, message_handler, NULL);
gst_object_unref (bus);
+ sync_clock = gst_pipeline_get_clock (GST_PIPELINE (bin));
+
appwindow = gtk_window_new (GTK_WINDOW_TOPLEVEL);
g_signal_connect (G_OBJECT (appwindow), "destroy",
G_CALLBACK (on_window_destroy), NULL);
gtk_range_set_value (GTK_RANGE (widget), 440.0);
g_signal_connect (G_OBJECT (widget), "value-changed",
G_CALLBACK (on_frequency_changed), (gpointer) src);
- gtk_container_add (GTK_CONTAINER (vbox), widget);
+ gtk_box_pack_start (GTK_BOX (vbox), widget, FALSE, FALSE, 0);
drawingarea = gtk_drawing_area_new ();
- gtk_widget_set_size_request (drawingarea, SPECT_BANDS, 64);
- gtk_container_add (GTK_CONTAINER (vbox), drawingarea);
+ gtk_widget_set_size_request (drawingarea, spect_bands, spect_height);
+ g_signal_connect (G_OBJECT (drawingarea), "configure-event",
+ G_CALLBACK (on_configure_event), (gpointer) spectrum);
+ gtk_box_pack_start (GTK_BOX (vbox), drawingarea, TRUE, TRUE, 0);
gtk_container_add (GTK_CONTAINER (appwindow), vbox);
gtk_widget_show_all (appwindow);
gtk_main ();
gst_element_set_state (bin, GST_STATE_NULL);
+ gst_object_unref (sync_clock);
gst_object_unref (bin);
return 0;
projects / platform / upstream / gstreamer.git / blobdiff