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gst/spectrum/: Handling window resize.

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Original commit message from CVS:
* gst/spectrum/demo-audiotest.c:
* gst/spectrum/demo-osssrc.c:
Handling window resize.
This commit is contained in:
Stefan Kost 2007-09-18 13:55:06 +00:00
parent 4bc97d6319
commit c364c7d630
3 changed files with 70 additions and 29 deletions
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6
ChangeLog
View file

@ -1,3 +1,9 @@
2007-09-18 Stefan Kost <ensonic@users.sf.net>
* gst/spectrum/demo-audiotest.c:
* gst/spectrum/demo-osssrc.c:
Handling window resize.
2007-09-18 Stefan Kost <ensonic@users.sf.net> 2007-09-18 Stefan Kost <ensonic@users.sf.net>
* ChangeLog: * ChangeLog:

50
gst/spectrum/demo-audiotest.c
View file

@ -16,6 +16,7 @@
* Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA. * Boston, MA 02111-1307, USA.
*/ */
/* TODO: add wave selection */
#ifdef HAVE_CONFIG_H #ifdef HAVE_CONFIG_H
#include "config.h" #include "config.h"
@ -28,9 +29,11 @@
#include <gtk/gtk.h> #include <gtk/gtk.h>
#define DEFAULT_AUDIOSINK "alsasink" #define DEFAULT_AUDIOSINK "alsasink"
#define SPECT_BANDS 256
static GtkWidget *drawingarea = NULL; static GtkWidget *drawingarea = NULL;
static guint spect_height = 64;
static guint spect_bands = 256;
static gfloat height_scale = 1.0;
static void static void
on_window_destroy (GtkObject * object, gpointer user_data) on_window_destroy (GtkObject * object, gpointer user_data)
@ -49,22 +52,37 @@ on_frequency_changed (GtkRange * range, gpointer user_data)
g_object_set (machine, "freq", value, NULL); g_object_set (machine, "freq", value, NULL);
} }
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 */ /* draw frequency spectrum as a bunch of bars */
static void static void
draw_spectrum (gfloat * data) draw_spectrum (gfloat * data)
{ {
gint i; gint i;
GdkRectangle rect = { 0, 0, SPECT_BANDS, 50 }; GdkRectangle rect = { 0, 0, spect_bands, spect_height };
if (!drawingarea) if (!drawingarea)
return; return;
gdk_window_begin_paint_rect (drawingarea->window, &rect); gdk_window_begin_paint_rect (drawingarea->window, &rect);
gdk_draw_rectangle (drawingarea->window, drawingarea->style->black_gc, gdk_draw_rectangle (drawingarea->window, drawingarea->style->black_gc,
TRUE, 0, 0, SPECT_BANDS, 50); TRUE, 0, 0, spect_bands, spect_height);
for (i = 0; i < SPECT_BANDS; i++) { for (i = 0; i < spect_bands; i++) {
gdk_draw_rectangle (drawingarea->window, drawingarea->style->white_gc, gdk_draw_rectangle (drawingarea->window, drawingarea->style->white_gc,
TRUE, i, 64 - data[i], 1, data[i]); TRUE, i, spect_height - data[i], 1, data[i]);
} }
gdk_window_end_paint (drawingarea->window); gdk_window_end_paint (drawingarea->window);
} }
@ -78,15 +96,15 @@ message_handler (GstBus * bus, GstMessage * message, gpointer data)
const gchar *name = gst_structure_get_name (s); const gchar *name = gst_structure_get_name (s);
if (strcmp (name, "spectrum") == 0) { if (strcmp (name, "spectrum") == 0) {
gfloat spect[SPECT_BANDS]; gfloat spect[spect_bands];
const GValue *list; const GValue *list;
const GValue *value; const GValue *value;
guint i; guint i;
list = gst_structure_get_value (s, "magnitude"); list = gst_structure_get_value (s, "magnitude");
for (i = 0; i < SPECT_BANDS; ++i) { for (i = 0; i < spect_bands; ++i) {
value = gst_value_list_get_value (list, i); value = gst_value_list_get_value (list, i);
spect[i] = g_value_get_float (value); spect[i] = height_scale * g_value_get_float (value);
} }
draw_spectrum (spect); draw_spectrum (spect);
} }
@ -108,12 +126,10 @@ main (int argc, char *argv[])
bin = gst_pipeline_new ("bin"); bin = gst_pipeline_new ("bin");
src = gst_element_factory_make ("audiotestsrc", "src"); 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"); 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); "message", TRUE, NULL);
audioconvert = gst_element_factory_make ("audioconvert", "audioconvert"); audioconvert = gst_element_factory_make ("audioconvert", "audioconvert");
@ -122,7 +138,7 @@ main (int argc, char *argv[])
gst_bin_add_many (GST_BIN (bin), src, spectrum, audioconvert, sink, NULL); gst_bin_add_many (GST_BIN (bin), src, spectrum, audioconvert, sink, NULL);
if (!gst_element_link_many (src, spectrum, audioconvert, sink, NULL)) { if (!gst_element_link_many (src, spectrum, audioconvert, sink, NULL)) {
fprintf (stderr, "cant link elements\n"); fprintf (stderr, "can't link elements\n");
exit (1); exit (1);
} }
@ -141,11 +157,13 @@ main (int argc, char *argv[])
gtk_range_set_value (GTK_RANGE (widget), 440.0); gtk_range_set_value (GTK_RANGE (widget), 440.0);
g_signal_connect (G_OBJECT (widget), "value-changed", g_signal_connect (G_OBJECT (widget), "value-changed",
G_CALLBACK (on_frequency_changed), (gpointer) src); 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 (); drawingarea = gtk_drawing_area_new ();
gtk_widget_set_size_request (drawingarea, SPECT_BANDS, 64); gtk_widget_set_size_request (drawingarea, spect_bands, spect_height);
gtk_container_add (GTK_CONTAINER (vbox), drawingarea); 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_container_add (GTK_CONTAINER (appwindow), vbox);
gtk_widget_show_all (appwindow); gtk_widget_show_all (appwindow);

43
gst/spectrum/demo-osssrc.c
View file

@ -28,9 +28,9 @@
#include <gtk/gtk.h> #include <gtk/gtk.h>
#define DEFAULT_AUDIOSRC "alsasrc" #define DEFAULT_AUDIOSRC "alsasrc"
#define SPECT_BANDS 256 static guint spect_height = 64;
#define SPECT_WIDTH (SPECT_BANDS) static guint spect_bands = 256;
#define SPECT_HEIGHT 64 static gfloat height_scale = 1.0;
static GtkWidget *drawingarea = NULL; static GtkWidget *drawingarea = NULL;
@ -41,22 +41,37 @@ on_window_destroy (GtkObject * object, gpointer user_data)
gtk_main_quit (); gtk_main_quit ();
} }
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 */ /* draw frequency spectrum as a bunch of bars */
static void static void
draw_spectrum (gfloat * data) draw_spectrum (gfloat * data)
{ {
gint i; gint i;
GdkRectangle rect = { 0, 0, SPECT_WIDTH, SPECT_HEIGHT }; GdkRectangle rect = { 0, 0, spect_bands, spect_height };
if (!drawingarea) if (!drawingarea)
return; return;
gdk_window_begin_paint_rect (drawingarea->window, &rect); gdk_window_begin_paint_rect (drawingarea->window, &rect);
gdk_draw_rectangle (drawingarea->window, drawingarea->style->black_gc, gdk_draw_rectangle (drawingarea->window, drawingarea->style->black_gc,
TRUE, 0, 0, SPECT_BANDS, SPECT_HEIGHT); TRUE, 0, 0, spect_bands, spect_height);
for (i = 0; i < SPECT_BANDS; i++) { for (i = 0; i < spect_bands; i++) {
gdk_draw_rectangle (drawingarea->window, drawingarea->style->white_gc, gdk_draw_rectangle (drawingarea->window, drawingarea->style->white_gc,
TRUE, i, SPECT_HEIGHT - data[i], 1, data[i]); TRUE, i, spect_height - data[i], 1, data[i]);
} }
gdk_window_end_paint (drawingarea->window); gdk_window_end_paint (drawingarea->window);
} }
@ -70,15 +85,15 @@ message_handler (GstBus * bus, GstMessage * message, gpointer data)
const gchar *name = gst_structure_get_name (s); const gchar *name = gst_structure_get_name (s);
if (strcmp (name, "spectrum") == 0) { if (strcmp (name, "spectrum") == 0) {
gfloat spect[SPECT_BANDS]; gfloat spect[spect_bands];
const GValue *list; const GValue *list;
const GValue *value; const GValue *value;
guint i; guint i;
list = gst_structure_get_value (s, "magnitude"); list = gst_structure_get_value (s, "magnitude");
for (i = 0; i < SPECT_BANDS; ++i) { for (i = 0; i < spect_bands; ++i) {
value = gst_value_list_get_value (list, i); value = gst_value_list_get_value (list, i);
spect[i] = g_value_get_float (value); spect[i] = height_scale * g_value_get_float (value);
} }
draw_spectrum (spect); draw_spectrum (spect);
} }
@ -102,14 +117,14 @@ main (int argc, char *argv[])
src = gst_element_factory_make (DEFAULT_AUDIOSRC, "src"); src = gst_element_factory_make (DEFAULT_AUDIOSRC, "src");
spectrum = gst_element_factory_make ("spectrum", "spectrum"); 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); "message", TRUE, NULL);
sink = gst_element_factory_make ("fakesink", "sink"); sink = gst_element_factory_make ("fakesink", "sink");
gst_bin_add_many (GST_BIN (bin), src, spectrum, sink, NULL); gst_bin_add_many (GST_BIN (bin), src, spectrum, sink, NULL);
if (!gst_element_link_many (src, spectrum, sink, NULL)) { if (!gst_element_link_many (src, spectrum, sink, NULL)) {
fprintf (stderr, "cant link elements\n"); fprintf (stderr, "can't link elements\n");
exit (1); exit (1);
} }
@ -122,7 +137,9 @@ main (int argc, char *argv[])
G_CALLBACK (on_window_destroy), NULL); G_CALLBACK (on_window_destroy), NULL);
drawingarea = gtk_drawing_area_new (); drawingarea = gtk_drawing_area_new ();
gtk_widget_set_size_request (drawingarea, SPECT_WIDTH, SPECT_HEIGHT); 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_container_add (GTK_CONTAINER (appwindow), drawingarea); gtk_container_add (GTK_CONTAINER (appwindow), drawingarea);
gtk_widget_show_all (appwindow); gtk_widget_show_all (appwindow);