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-rw-r--r--gst/equalizer/demo.c247
1 files changed, 0 insertions, 247 deletions
diff --git a/gst/equalizer/demo.c b/gst/equalizer/demo.c
deleted file mode 100644
index 43518463..00000000
--- a/gst/equalizer/demo.c
+++ /dev/null
@@ -1,247 +0,0 @@
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include <gst/gst.h>
-#include <gtk/gtk.h>
-
-#define NBANDS 10
-
-static GtkWidget *drawingarea = NULL;
-static guint spect_height = 128;
-static guint spect_bands = 256;
-static gfloat height_scale = 2.0;
-
-static void
-on_window_destroy (GtkObject * object, gpointer user_data)
-{
- drawingarea = NULL;
- gtk_main_quit ();
-}
-
-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;
-}
-
-/* control gains */
-static void
-on_gain_changed (GtkRange * range, gpointer user_data)
-{
- GstObject *band = GST_OBJECT (user_data);
- gdouble value = gtk_range_get_value (range);
-
- g_object_set (band, "gain", value, NULL);
-}
-
-/* control bandwidths */
-static void
-on_bandwidth_changed (GtkRange * range, gpointer user_data)
-{
- GstObject *band = GST_OBJECT (user_data);
- gdouble value = gtk_range_get_value (range);
-
- g_object_set (band, "bandwidth", value, NULL);
-}
-
-/* control frequency */
-static void
-on_freq_changed (GtkRange * range, gpointer user_data)
-{
- GstObject *band = GST_OBJECT (user_data);
- gdouble value = gtk_range_get_value (range);
-
- /* hbox */
- GtkWidget *parent = gtk_widget_get_parent (GTK_WIDGET (range));
-
- /* frame */
- GtkWidget *parent_parent = gtk_widget_get_parent (parent);
- gchar *label = g_strdup_printf ("%d Hz", (int) (value + 0.5));
-
- gtk_frame_set_label (GTK_FRAME (parent_parent), label);
- g_free (label);
-
- g_object_set (band, "freq", value, NULL);
-}
-
-/* draw frequency spectrum as a bunch of bars */
-static void
-draw_spectrum (gfloat * data)
-{
- gint i;
- 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, spect_height);
- for (i = 0; i < spect_bands; i++) {
- gdk_draw_rectangle (drawingarea->window, drawingarea->style->white_gc,
- TRUE, i, -data[i], 1, spect_height + data[i]);
- }
- gdk_window_end_paint (drawingarea->window);
-}
-
-/* receive spectral data from element message */
-gboolean
-message_handler (GstBus * bus, GstMessage * message, gpointer data)
-{
- if (message->type == GST_MESSAGE_ELEMENT) {
- const GstStructure *s = gst_message_get_structure (message);
- const gchar *name = gst_structure_get_name (s);
-
- if (strcmp (name, "spectrum") == 0) {
- gfloat spect[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);
- }
- draw_spectrum (spect);
- }
- }
- return TRUE;
-}
-
-int
-main (int argc, char *argv[])
-{
- GstElement *bin;
- GstElement *src, *capsfilter, *equalizer, *spectrum, *audioconvert, *sink;
- GstCaps *caps;
- GstBus *bus;
- GtkWidget *appwindow, *vbox, *hbox, *widget;
-
- gst_init (&argc, &argv);
- gtk_init (&argc, &argv);
-
- bin = gst_pipeline_new ("bin");
-
- /* White noise */
- src = gst_element_factory_make ("audiotestsrc", "src");
- g_object_set (G_OBJECT (src), "wave", 5, "volume", 0.8, NULL);
-
- /* Force float32 samples */
- capsfilter = gst_element_factory_make ("capsfilter", "capsfilter");
- caps =
- gst_caps_new_simple ("audio/x-raw-float", "width", G_TYPE_INT, 32, NULL);
- g_object_set (capsfilter, "caps", caps, NULL);
-
- equalizer = gst_element_factory_make ("equalizer-nbands", "equalizer");
- g_object_set (G_OBJECT (equalizer), "num-bands", NBANDS, NULL);
-
- spectrum = gst_element_factory_make ("spectrum", "spectrum");
- g_object_set (G_OBJECT (spectrum), "bands", spect_bands, "threshold", -80,
- "message", TRUE, "interval", 500 * GST_MSECOND, NULL);
-
- audioconvert = gst_element_factory_make ("audioconvert", "audioconvert");
-
- sink = gst_element_factory_make ("autoaudiosink", "sink");
-
- gst_bin_add_many (GST_BIN (bin), src, capsfilter, equalizer, spectrum,
- audioconvert, sink, NULL);
- if (!gst_element_link_many (src, capsfilter, equalizer, spectrum,
- audioconvert, sink, NULL)) {
- fprintf (stderr, "can't link elements\n");
- exit (1);
- }
-
- bus = gst_element_get_bus (bin);
- gst_bus_add_watch (bus, message_handler, NULL);
- gst_object_unref (bus);
-
- appwindow = gtk_window_new (GTK_WINDOW_TOPLEVEL);
- g_signal_connect (G_OBJECT (appwindow), "destroy",
- G_CALLBACK (on_window_destroy), NULL);
- vbox = gtk_vbox_new (FALSE, 6);
-
- drawingarea = gtk_drawing_area_new ();
- 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);
-
- hbox = gtk_hbox_new (FALSE, 20);
-
- int i;
-
- for (i = 0; i < NBANDS; i++) {
- GstObject *band;
- gdouble freq;
- gdouble bw;
- gdouble gain;
- gchar *label;
- GtkWidget *frame, *scales_hbox;
-
- band = gst_child_proxy_get_child_by_index (GST_CHILD_PROXY (equalizer), i);
- g_assert (band != NULL);
- g_object_get (G_OBJECT (band), "freq", &freq, NULL);
- g_object_get (G_OBJECT (band), "bandwidth", &bw, NULL);
- g_object_get (G_OBJECT (band), "gain", &gain, NULL);
-
- label = g_strdup_printf ("%d Hz", (int) (freq + 0.5));
- frame = gtk_frame_new (label);
- g_free (label);
-
- scales_hbox = gtk_hbox_new (FALSE, 6);
-
- widget = gtk_vscale_new_with_range (-24.0, 12.0, 0.5);
- gtk_scale_set_draw_value (GTK_SCALE (widget), TRUE);
- gtk_scale_set_value_pos (GTK_SCALE (widget), GTK_POS_TOP);
- gtk_range_set_value (GTK_RANGE (widget), gain);
- gtk_widget_set_size_request (widget, 25, 150);
- g_signal_connect (G_OBJECT (widget), "value-changed",
- G_CALLBACK (on_gain_changed), (gpointer) band);
- gtk_box_pack_start (GTK_BOX (scales_hbox), widget, FALSE, FALSE, 0);
-
- widget = gtk_vscale_new_with_range (0.0, 20000.0, 5.0);
- gtk_scale_set_draw_value (GTK_SCALE (widget), TRUE);
- gtk_scale_set_value_pos (GTK_SCALE (widget), GTK_POS_TOP);
- gtk_range_set_value (GTK_RANGE (widget), bw);
- gtk_widget_set_size_request (widget, 25, 150);
- g_signal_connect (G_OBJECT (widget), "value-changed",
- G_CALLBACK (on_bandwidth_changed), (gpointer) band);
- gtk_box_pack_start (GTK_BOX (scales_hbox), widget, TRUE, TRUE, 0);
-
- widget = gtk_vscale_new_with_range (20.0, 20000.0, 5.0);
- gtk_scale_set_draw_value (GTK_SCALE (widget), TRUE);
- gtk_scale_set_value_pos (GTK_SCALE (widget), GTK_POS_TOP);
- gtk_range_set_value (GTK_RANGE (widget), freq);
- gtk_widget_set_size_request (widget, 25, 150);
- g_signal_connect (G_OBJECT (widget), "value-changed",
- G_CALLBACK (on_freq_changed), (gpointer) band);
- gtk_box_pack_start (GTK_BOX (scales_hbox), widget, TRUE, TRUE, 0);
-
- gtk_container_add (GTK_CONTAINER (frame), scales_hbox);
-
- gtk_box_pack_start (GTK_BOX (hbox), frame, TRUE, TRUE, 0);
- }
-
- gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, TRUE, 0);
-
- gtk_container_add (GTK_CONTAINER (appwindow), vbox);
- gtk_widget_show_all (appwindow);
-
- gst_element_set_state (bin, GST_STATE_PLAYING);
- gtk_main ();
- gst_element_set_state (bin, GST_STATE_NULL);
-
- gst_object_unref (bin);
-
- return 0;
-}
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