diff options
Diffstat (limited to 'tests/examples/equalizer')
| -rw-r--r-- | tests/examples/equalizer/Makefile.am | 8 | ||||
| -rwxr-xr-x | tests/examples/equalizer/Makefile.in | 835 | ||||
| -rw-r--r-- | tests/examples/equalizer/demo.c | 258 |
3 files changed, 1101 insertions, 0 deletions
diff --git a/tests/examples/equalizer/Makefile.am b/tests/examples/equalizer/Makefile.am new file mode 100644 index 0000000..07f2b25 --- /dev/null +++ b/tests/examples/equalizer/Makefile.am @@ -0,0 +1,8 @@ +if HAVE_GTK +noinst_PROGRAMS = demo +endif + +demo_SOURCES = demo.c +demo_CFLAGS = $(GST_BASE_CFLAGS) $(GST_CFLAGS) $(GTK_CFLAGS) +demo_LDADD = $(GST_BASE_LIBS) $(GST_LIBS) $(GTK_LIBS) + diff --git a/tests/examples/equalizer/Makefile.in b/tests/examples/equalizer/Makefile.in new file mode 100755 index 0000000..d9f0da4 --- /dev/null +++ b/tests/examples/equalizer/Makefile.in @@ -0,0 +1,835 @@ +# Makefile.in generated by automake 1.14.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2013 Free Software Foundation, Inc. + +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; 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/dev/null +++ b/tests/examples/equalizer/demo.c @@ -0,0 +1,258 @@ +#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 (GObject * 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 }; + 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); + for (i = 0; i < spect_bands; i++) { + cairo_set_source_rgb (cr, 1, 1, 1); + 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)); +} + +/* 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) { + 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); + } + draw_spectrum (spect); + g_free (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; + int i; + + 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", "format", G_TYPE_STRING, "F32LE", + 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_box_new (GTK_ORIENTATION_VERTICAL, 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_box_new (GTK_ORIENTATION_HORIZONTAL, 20); + + for (i = 0; i < NBANDS; i++) { + GObject *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 (band, "freq", &freq, NULL); + g_object_get (band, "bandwidth", &bw, NULL); + g_object_get (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_box_new (GTK_ORIENTATION_HORIZONTAL, 6); + + widget = gtk_scale_new_with_range (GTK_ORIENTATION_VERTICAL, + -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_scale_new_with_range (GTK_ORIENTATION_VERTICAL, + 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_scale_new_with_range (GTK_ORIENTATION_VERTICAL, + 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; +} |