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tests/examples/spectrum/: Demo how to draw analyzer results synced to the clock.
Original commit message from CVS: * tests/examples/spectrum/demo-audiotest.c: * tests/examples/spectrum/demo-osssrc.c: Demo how to draw analyzer results synced to the clock.
This commit is contained in:
Stefan Kost
parent
20b5b4c2d9
commit
0f6a6dc73a
3 changed files with 108 additions and 25 deletions
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@ -1,3 +1,9 @@
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2008-08-10 Stefan Kost <ensonic@users.sf.net>
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* tests/examples/spectrum/demo-audiotest.c:
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* tests/examples/spectrum/demo-osssrc.c:
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Demo how to draw analyzer results synced to the clock.
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2008-08-10 Stefan Kost <ensonic@users.sf.net>
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* gst/level/gstlevel.c:
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@ -32,11 +32,13 @@
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#define DEFAULT_AUDIOSINK "autoaudiosink"
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#endif
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static GtkWidget *drawingarea = NULL;
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static guint spect_height = 64;
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static guint spect_bands = 256;
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static gfloat height_scale = 1.0;
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static GtkWidget *drawingarea = NULL;
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static GstClock *sync_clock = NULL;
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static void
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on_window_destroy (GtkObject * object, gpointer user_data)
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{
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@ -54,7 +56,7 @@ on_frequency_changed (GtkRange * range, gpointer user_data)
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g_object_set (machine, "freq", value, NULL);
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}
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gboolean
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static gboolean
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on_configure_event (GtkWidget * widget, GdkEventConfigure * event,
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gpointer user_data)
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{
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@ -89,8 +91,23 @@ draw_spectrum (gfloat * data)
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gdk_window_end_paint (drawingarea->window);
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}
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/* process delayed message */
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static gboolean
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delayed_spectrum_update (GstClock * sync_clock, GstClockTime time,
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GstClockID id, gpointer user_data)
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{
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if (!GST_CLOCK_TIME_IS_VALID (time))
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goto done;
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draw_spectrum ((gfloat *) user_data);
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done:
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g_free (user_data);
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return (TRUE);
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}
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/* receive spectral data from element message */
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gboolean
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static gboolean
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message_handler (GstBus * bus, GstMessage * message, gpointer data)
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{
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if (message->type == GST_MESSAGE_ELEMENT) {
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@ -98,18 +115,37 @@ message_handler (GstBus * bus, GstMessage * message, gpointer data)
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const gchar *name = gst_structure_get_name (s);
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if (strcmp (name, "spectrum") == 0) {
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gfloat *spect = g_new (gfloat, spect_bands);
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const GValue *list;
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const GValue *value;
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guint i;
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GstElement *spectrum = GST_ELEMENT (GST_MESSAGE_SRC (message));
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GstClockTime timestamp, duration;
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GstClockTime waittime = GST_CLOCK_TIME_NONE;
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list = gst_structure_get_value (s, "magnitude");
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for (i = 0; i < spect_bands; ++i) {
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value = gst_value_list_get_value (list, i);
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spect[i] = height_scale * g_value_get_float (value);
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if (gst_structure_get_clock_time (s, "running-time", ×tamp) &&
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gst_structure_get_clock_time (s, "duration", &duration)) {
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/* wait for middle of buffer */
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waittime = timestamp + duration / 2;
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} else if (gst_structure_get_clock_time (s, "endtime", ×tamp)) {
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waittime = timestamp;
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}
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if (GST_CLOCK_TIME_IS_VALID (waittime)) {
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GstClockID clock_id;
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GstClockTime basetime = gst_element_get_base_time (spectrum);
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gfloat *spect = g_new (gfloat, spect_bands);
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const GValue *list;
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const GValue *value;
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guint i;
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list = gst_structure_get_value (s, "magnitude");
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for (i = 0; i < spect_bands; ++i) {
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value = gst_value_list_get_value (list, i);
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spect[i] = height_scale * g_value_get_float (value);
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}
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clock_id =
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gst_clock_new_single_shot_id (sync_clock, waittime + basetime);
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gst_clock_id_wait_async (clock_id, delayed_spectrum_update,
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(gpointer) spect);
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gst_clock_id_unref (clock_id);
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}
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draw_spectrum (spect);
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g_free (spect);
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}
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}
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return TRUE;
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@ -149,6 +185,8 @@ main (int argc, char *argv[])
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gst_bus_add_watch (bus, message_handler, NULL);
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gst_object_unref (bus);
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sync_clock = gst_pipeline_get_clock (GST_PIPELINE (bin));
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appwindow = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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g_signal_connect (G_OBJECT (appwindow), "destroy",
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G_CALLBACK (on_window_destroy), NULL);
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@ -175,6 +213,7 @@ main (int argc, char *argv[])
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gtk_main ();
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gst_element_set_state (bin, GST_STATE_NULL);
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gst_object_unref (sync_clock);
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gst_object_unref (bin);
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return 0;
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@ -36,6 +36,7 @@ static guint spect_bands = 256;
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static gfloat height_scale = 1.0;
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static GtkWidget *drawingarea = NULL;
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static GstClock *sync_clock = NULL;
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static void
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on_window_destroy (GtkObject * object, gpointer user_data)
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@ -44,7 +45,7 @@ on_window_destroy (GtkObject * object, gpointer user_data)
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gtk_main_quit ();
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}
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gboolean
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static gboolean
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on_configure_event (GtkWidget * widget, GdkEventConfigure * event,
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gpointer user_data)
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{
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@ -79,8 +80,23 @@ draw_spectrum (gfloat * data)
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gdk_window_end_paint (drawingarea->window);
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}
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/* process delayed message */
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static gboolean
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delayed_spectrum_update (GstClock * sync_clock, GstClockTime time,
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GstClockID id, gpointer user_data)
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{
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if (!GST_CLOCK_TIME_IS_VALID (time))
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goto done;
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draw_spectrum ((gfloat *) user_data);
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done:
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g_free (user_data);
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return (TRUE);
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}
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/* receive spectral data from element message */
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gboolean
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static gboolean
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message_handler (GstBus * bus, GstMessage * message, gpointer data)
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{
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if (message->type == GST_MESSAGE_ELEMENT) {
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@ -88,18 +104,37 @@ message_handler (GstBus * bus, GstMessage * message, gpointer data)
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const gchar *name = gst_structure_get_name (s);
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if (strcmp (name, "spectrum") == 0) {
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gfloat *spect = g_new (gfloat, spect_bands);
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const GValue *list;
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const GValue *value;
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guint i;
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GstElement *spectrum = GST_ELEMENT (GST_MESSAGE_SRC (message));
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GstClockTime timestamp, duration;
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GstClockTime waittime = GST_CLOCK_TIME_NONE;
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list = gst_structure_get_value (s, "magnitude");
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for (i = 0; i < spect_bands; ++i) {
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value = gst_value_list_get_value (list, i);
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spect[i] = height_scale * g_value_get_float (value);
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if (gst_structure_get_clock_time (s, "running-time", ×tamp) &&
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gst_structure_get_clock_time (s, "duration", &duration)) {
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/* wait for middle of buffer */
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waittime = timestamp + duration / 2;
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} else if (gst_structure_get_clock_time (s, "endtime", ×tamp)) {
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waittime = timestamp;
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}
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if (GST_CLOCK_TIME_IS_VALID (waittime)) {
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GstClockID clock_id;
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GstClockTime basetime = gst_element_get_base_time (spectrum);
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gfloat *spect = g_new (gfloat, spect_bands);
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const GValue *list;
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const GValue *value;
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guint i;
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list = gst_structure_get_value (s, "magnitude");
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for (i = 0; i < spect_bands; ++i) {
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value = gst_value_list_get_value (list, i);
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spect[i] = height_scale * g_value_get_float (value);
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}
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clock_id =
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gst_clock_new_single_shot_id (sync_clock, waittime + basetime);
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gst_clock_id_wait_async (clock_id, delayed_spectrum_update,
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(gpointer) spect);
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gst_clock_id_unref (clock_id);
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}
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draw_spectrum (spect);
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g_free (spect);
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}
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}
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return TRUE;
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@ -136,6 +171,8 @@ main (int argc, char *argv[])
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gst_bus_add_watch (bus, message_handler, NULL);
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gst_object_unref (bus);
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sync_clock = gst_pipeline_get_clock (GST_PIPELINE (bin));
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appwindow = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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g_signal_connect (G_OBJECT (appwindow), "destroy",
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G_CALLBACK (on_window_destroy), NULL);
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@ -151,6 +188,7 @@ main (int argc, char *argv[])
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gtk_main ();
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gst_element_set_state (bin, GST_STATE_NULL);
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gst_object_unref (sync_clock);
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gst_object_unref (bin);
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return 0;
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