1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/*
* GStreamer
* Copyright (C) 2002 Andy Wingo <wingo at pobox dot com>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <stdlib.h>
#include <gtk/gtk.h>
#include <gst/gst.h>
void set_speed (GtkAdjustment *adj, gpointer data)
{
GstElement *speed = GST_ELEMENT(data);
g_object_set (speed, "speed", adj->value, NULL);
}
int main(int argc, char **argv)
{
GtkWidget *window, *vbox, *hscale, *button;
GstElement *filesrc, *mad, *stereo2mono, *speed, *osssink, *pipeline;
gst_init (&argc, &argv);
gtk_init (&argc, &argv);
if (argc!=2) {
g_print("usage: %s <your.mp3>\n", argv[0]);
exit(-1);
}
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size(GTK_WINDOW(window), 400, 80);
vbox = gtk_vbox_new(FALSE, 0);
gtk_widget_show(vbox);
hscale = gtk_hscale_new(GTK_ADJUSTMENT(gtk_adjustment_new(1.0, 0.01, 4.0,
0.1, 0.0, 0.0)));
gtk_scale_set_digits(GTK_SCALE(hscale), 2);
gtk_range_set_update_policy(GTK_RANGE(hscale), GTK_UPDATE_CONTINUOUS);
button = gtk_button_new_with_label("quit");
gtk_container_add(GTK_CONTAINER(window), vbox);
gtk_box_pack_start(GTK_BOX(vbox), hscale, TRUE, TRUE, 2);
gtk_box_pack_start(GTK_BOX(vbox), button, FALSE, FALSE, 2);
gtk_widget_show(hscale);
gtk_signal_connect(GTK_OBJECT(button), "clicked", gtk_main_quit, NULL);
gtk_widget_show(button);
filesrc = gst_element_factory_make("filesrc", "filesrc");
mad = gst_element_factory_make("mad", "mad");
stereo2mono = gst_element_factory_make("stereo2mono", "stereo2mono");
speed = gst_element_factory_make("speed", "speed");
osssink = gst_element_factory_make("osssink", "osssink");
g_object_set(osssink, "fragment", 0x00180008, NULL);
gtk_signal_connect(GTK_OBJECT(gtk_range_get_adjustment(GTK_RANGE(hscale))),
"value_changed", G_CALLBACK (set_speed), speed);
pipeline = gst_pipeline_new("app");
gst_bin_add_many (GST_BIN(pipeline), filesrc, mad, stereo2mono, speed, osssink, NULL);
gst_element_link_many (filesrc, mad, stereo2mono, speed, osssink, NULL);
g_object_set(G_OBJECT(filesrc), "location", argv[1], NULL);
gst_element_set_state(pipeline, GST_STATE_PLAYING);
gtk_widget_show(window);
gtk_idle_add((GtkFunction)gst_bin_iterate, pipeline);
gtk_main();
return 0;
}
|
