tests/examples/spectrum/demo-audiotest.c - mtk-gst-plugins-good-debian - Git at Google

 /* GStreamer
  * Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public
  * License along with this library; if not, write to the
  * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 /* TODO: add wave selection */
 /* fast vs. slow mode - see update_spectrum_bands()
  * we are still cheating below, we only draw the first spect_bands and ignore a few :/
  *
  * xtime gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1441 ! fakesink
  * 2.29u 0.02s 2.14r 25504kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1441 ! fakesink
  * 2.20u 0.05s 2.10r 25664kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1441 ! fakesink
  * 2.23u 0.04s 2.10r 25664kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1441 ! fakesink
  *
  * xtime gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1440 ! fakesink
  * 25.01u 0.08s 25.00r 25552kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1440 ! fakesink
  * 24.96u 0.03s 24.88r 25568kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1440 ! fakesink
  * 25.11u 0.03s 25.03r 25536kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1440 ! fakesink
  */

 #ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif

 /* TODO: We use gdk_cairo_create() and others, which are deprecated */
 #define GDK_DISABLE_DEPRECATION_WARNINGS

 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
 #include <gst/gst.h>
 #include <gst/fft/gstfft.h>
 #include <gtk/gtk.h>

 #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 gboolean fast = FALSE;

 static GtkWidget *drawingarea = NULL;
 static GtkWidget *bands_used = NULL;
 static GstClock *sync_clock = NULL;

 static void
 on_window_destroy (GObject * object, gpointer user_data)
 {
   drawingarea = NULL;
   gtk_main_quit ();
 }

 /* control audiotestsrc frequency */
 static void
 on_frequency_changed (GtkRange * range, gpointer user_data)
 {
   GstElement *machine = GST_ELEMENT (user_data);
   gdouble value = gtk_range_get_value (range);

   g_object_set (machine, "freq", value, NULL);
 }

 static void
 update_spectrum_bands (GstElement * spectrum)
 {
   guint bands = spect_bands;
   gchar str[50];

   if (fast)
     bands = ((gst_fft_next_fast_length (2 * bands - 2) + 2) / 2);

   sprintf (str, "using %u bands", bands);

   g_object_set (bands_used, "label", str, NULL);
   g_object_set (G_OBJECT (spectrum), "bands", bands, NULL);
 }

 static gboolean
 on_configure_event (GtkWidget * widget, GdkEventConfigure * event,
     gpointer 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;

   update_spectrum_bands (GST_ELEMENT (user_data));
   return FALSE;
 }

 static void
 on_fast_slow_mode_changed (GtkToggleButton * togglebutton, gpointer user_data)
 {
   fast = gtk_toggle_button_get_active (togglebutton);
   update_spectrum_bands (GST_ELEMENT (user_data));
 }

 /* draw frequency spectrum as a bunch of bars */
 static void
 draw_spectrum (gfloat * data)
 {
   gint i;
   GdkRectangle rect = { 0, 0, spect_bands, spect_height };
   cairo_t *cr;

   if (!drawingarea)
     return;

   gdk_window_begin_paint_rect (gtk_widget_get_window (drawingarea), &rect);
   cr = gdk_cairo_create (gtk_widget_get_window (drawingarea));

   cairo_set_source_rgb (cr, 0, 0, 0);
   cairo_rectangle (cr, 0, 0, spect_bands, spect_height);
   cairo_fill (cr);
   cairo_set_source_rgb (cr, 1, 1, 1);
   for (i = 0; i < spect_bands; i++) {
     cairo_rectangle (cr, i, -data[i], 1, spect_height + data[i]);
     cairo_fill (cr);
   }
   cairo_destroy (cr);

   gdk_window_end_paint (gtk_widget_get_window (drawingarea));
 }

 /* 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 */
 static 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) {
       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", &timestamp) &&
           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", &timestamp)) {
         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, NULL);
         gst_clock_id_unref (clock_id);
       }
     }
   }
   return TRUE;
 }

 int
 main (int argc, char *argv[])
 {
   GstElement *bin;
   GstElement *src, *spectrum, *audioconvert, *sink;
   GstBus *bus;
   GtkWidget *appwindow, *vbox, *hbox, *widget;

   gst_init (&argc, &argv);
   gtk_init (&argc, &argv);

   bin = gst_pipeline_new ("bin");

   src = gst_element_factory_make ("audiotestsrc", "src");
   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,
       "post-messages", 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, audioconvert, sink, NULL);
   if (!gst_element_link_many (src, 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);

   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);
   vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);

   hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
   widget = gtk_check_button_new_with_label ("Fast");
   g_signal_connect (G_OBJECT (widget), "toggled",
       G_CALLBACK (on_fast_slow_mode_changed), (gpointer) spectrum);
   gtk_box_pack_start (GTK_BOX (hbox), widget, FALSE, FALSE, 0);
   bands_used = gtk_label_new ("");
   gtk_box_pack_start (GTK_BOX (hbox), bands_used, FALSE, FALSE, 0);

   gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);

   widget = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL,
       50.0, 20000.0, 10);
   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), 440.0);
   g_signal_connect (G_OBJECT (widget), "value-changed",
       G_CALLBACK (on_frequency_changed), (gpointer) src);
   gtk_box_pack_start (GTK_BOX (vbox), widget, FALSE, FALSE, 0);

   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);

   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 (sync_clock);
   gst_object_unref (bin);

   return 0;
 }
	/* GStreamer
	* Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
	*
	* This library is free software; you can redistribute it and/or
	* modify it under the terms of the GNU Library General Public
	* License as published by the Free Software Foundation; either
	* version 2 of the License, or (at your option) any later version.
	*
	* This library is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* Library General Public License for more details.
	*
	* You should have received a copy of the GNU Library General Public
	* License along with this library; if not, write to the
	* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
	* Boston, MA 02110-1301, USA.
	*/
	/* TODO: add wave selection */
	/* fast vs. slow mode - see update_spectrum_bands()
	* we are still cheating below, we only draw the first spect_bands and ignore a few :/
	*
	* xtime gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1441 ! fakesink
	* 2.29u 0.02s 2.14r 25504kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1441 ! fakesink
	* 2.20u 0.05s 2.10r 25664kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1441 ! fakesink
	* 2.23u 0.04s 2.10r 25664kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1441 ! fakesink
	*
	* xtime gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1440 ! fakesink
	* 25.01u 0.08s 25.00r 25552kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1440 ! fakesink
	* 24.96u 0.03s 24.88r 25568kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1440 ! fakesink
	* 25.11u 0.03s 25.03r 25536kB gst-launch-0.10 -q audiotestsrc num-buffers=10000 ! spectrum bands=1440 ! fakesink
	*/

	#ifdef HAVE_CONFIG_H
	#include "config.h"
	#endif

	/* TODO: We use gdk_cairo_create() and others, which are deprecated */
	#define GDK_DISABLE_DEPRECATION_WARNINGS

	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <math.h>
	#include <gst/gst.h>
	#include <gst/fft/gstfft.h>
	#include <gtk/gtk.h>

	#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 gboolean fast = FALSE;

	static GtkWidget *drawingarea = NULL;
	static GtkWidget *bands_used = NULL;
	static GstClock *sync_clock = NULL;

	static void
	on_window_destroy (GObject * object, gpointer user_data)
	{
	drawingarea = NULL;
	gtk_main_quit ();
	}

	/* control audiotestsrc frequency */
	static void
	on_frequency_changed (GtkRange * range, gpointer user_data)
	{
	GstElement *machine = GST_ELEMENT (user_data);
	gdouble value = gtk_range_get_value (range);

	g_object_set (machine, "freq", value, NULL);
	}

	static void
	update_spectrum_bands (GstElement * spectrum)
	{
	guint bands = spect_bands;
	gchar str[50];

	if (fast)
	bands = ((gst_fft_next_fast_length (2 * bands - 2) + 2) / 2);

	sprintf (str, "using %u bands", bands);

	g_object_set (bands_used, "label", str, NULL);
	g_object_set (G_OBJECT (spectrum), "bands", bands, NULL);
	}

	static gboolean
	on_configure_event (GtkWidget * widget, GdkEventConfigure * event,
	gpointer 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;

	update_spectrum_bands (GST_ELEMENT (user_data));
	return FALSE;
	}

	static void
	on_fast_slow_mode_changed (GtkToggleButton * togglebutton, gpointer user_data)
	{
	fast = gtk_toggle_button_get_active (togglebutton);
	update_spectrum_bands (GST_ELEMENT (user_data));
	}

	/* draw frequency spectrum as a bunch of bars */
	static void
	draw_spectrum (gfloat * data)
	{
	gint i;
	GdkRectangle rect = { 0, 0, spect_bands, spect_height };
	cairo_t *cr;

	if (!drawingarea)
	return;

	gdk_window_begin_paint_rect (gtk_widget_get_window (drawingarea), &rect);
	cr = gdk_cairo_create (gtk_widget_get_window (drawingarea));

	cairo_set_source_rgb (cr, 0, 0, 0);
	cairo_rectangle (cr, 0, 0, spect_bands, spect_height);
	cairo_fill (cr);
	cairo_set_source_rgb (cr, 1, 1, 1);
	for (i = 0; i < spect_bands; i++) {
	cairo_rectangle (cr, i, -data[i], 1, spect_height + data[i]);
	cairo_fill (cr);
	}
	cairo_destroy (cr);

	gdk_window_end_paint (gtk_widget_get_window (drawingarea));
	}

	/* 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 */
	static 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) {
	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", &timestamp) &&
	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", &timestamp)) {
	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, NULL);
	gst_clock_id_unref (clock_id);
	}
	}
	}
	return TRUE;
	}

	int
	main (int argc, char *argv[])
	{
	GstElement *bin;
	GstElement src, spectrum, audioconvert, sink;
	GstBus *bus;
	GtkWidget appwindow, vbox, hbox, widget;

	gst_init (&argc, &argv);
	gtk_init (&argc, &argv);

	bin = gst_pipeline_new ("bin");

	src = gst_element_factory_make ("audiotestsrc", "src");
	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,
	"post-messages", 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, audioconvert, sink, NULL);
	if (!gst_element_link_many (src, 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);

	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);
	vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);

	hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
	widget = gtk_check_button_new_with_label ("Fast");
	g_signal_connect (G_OBJECT (widget), "toggled",
	G_CALLBACK (on_fast_slow_mode_changed), (gpointer) spectrum);
	gtk_box_pack_start (GTK_BOX (hbox), widget, FALSE, FALSE, 0);
	bands_used = gtk_label_new ("");
	gtk_box_pack_start (GTK_BOX (hbox), bands_used, FALSE, FALSE, 0);

	gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);

	widget = gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL,
	50.0, 20000.0, 10);
	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), 440.0);
	g_signal_connect (G_OBJECT (widget), "value-changed",
	G_CALLBACK (on_frequency_changed), (gpointer) src);
	gtk_box_pack_start (GTK_BOX (vbox), widget, FALSE, FALSE, 0);

	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);

	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 (sync_clock);
	gst_object_unref (bin);

	return 0;
	}