|
Packit |
971217 |
/* GStreamer
|
|
Packit |
971217 |
*
|
|
Packit |
971217 |
* audiomix.c: sample audio mixing application
|
|
Packit |
971217 |
*
|
|
Packit |
971217 |
* Copyright (C) 2011 Stefan Sauer <ensonic@users.sf.net>
|
|
Packit |
971217 |
*
|
|
Packit |
971217 |
* This library is free software; you can redistribute it and/or
|
|
Packit |
971217 |
* modify it under the terms of the GNU Library General Public
|
|
Packit |
971217 |
* License as published by the Free Software Foundation; either
|
|
Packit |
971217 |
* version 2 of the License, or (at your option) any later version.
|
|
Packit |
971217 |
*
|
|
Packit |
971217 |
* This library is distributed in the hope that it will be useful,
|
|
Packit |
971217 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
971217 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
971217 |
* Library General Public License for more details.
|
|
Packit |
971217 |
*
|
|
Packit |
971217 |
* You should have received a copy of the GNU Library General Public
|
|
Packit |
971217 |
* License along with this library; if not, write to the
|
|
Packit |
971217 |
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
|
Packit |
971217 |
* Boston, MA 02110-1301, USA.
|
|
Packit |
971217 |
*/
|
|
Packit |
971217 |
|
|
Packit |
971217 |
#ifdef HAVE_CONFIG_H
|
|
Packit |
971217 |
#include "config.h"
|
|
Packit |
971217 |
#endif
|
|
Packit |
971217 |
|
|
Packit |
971217 |
#include <string.h>
|
|
Packit |
971217 |
#include <gst/gst.h>
|
|
Packit |
971217 |
#include <gtk/gtk.h>
|
|
Packit |
971217 |
|
|
Packit |
971217 |
/* global items for the interaction */
|
|
Packit |
971217 |
static GtkWidget *scale;
|
|
Packit |
971217 |
static GObject *volumes[2];
|
|
Packit |
971217 |
static gint num_vol = 0;
|
|
Packit |
971217 |
|
|
Packit |
971217 |
|
|
Packit |
971217 |
static void
|
|
Packit |
971217 |
value_changed_callback (GtkWidget * widget, gpointer * user_data)
|
|
Packit |
971217 |
{
|
|
Packit |
971217 |
gdouble value = gtk_range_get_value (GTK_RANGE (widget));
|
|
Packit |
971217 |
g_object_set (volumes[0], "volume", 1.0 - value, NULL);
|
|
Packit |
971217 |
g_object_set (volumes[1], "volume", value, NULL);
|
|
Packit |
971217 |
}
|
|
Packit |
971217 |
|
|
Packit |
971217 |
static void
|
|
Packit |
971217 |
setup_gui (GstElement * volume, gchar * file_name1, gchar * file_name2)
|
|
Packit |
971217 |
{
|
|
Packit |
971217 |
GtkWidget *window, *layout, *label;
|
|
Packit |
971217 |
gchar *name, *ext;
|
|
Packit |
971217 |
|
|
Packit |
971217 |
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
|
|
Packit |
971217 |
gtk_window_set_title (GTK_WINDOW (window), "audiomix");
|
|
Packit |
971217 |
g_signal_connect (window, "destroy", gtk_main_quit, NULL);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
layout = gtk_grid_new ();
|
|
Packit |
971217 |
g_object_set (G_OBJECT (layout), "column-spacing", 6, NULL);
|
|
Packit |
971217 |
gtk_container_add (GTK_CONTAINER (window), layout);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
/* channel labels */
|
|
Packit |
971217 |
name = g_path_get_basename (file_name1);
|
|
Packit |
971217 |
if ((ext = strrchr (name, '.')))
|
|
Packit |
971217 |
*ext = '\0';
|
|
Packit |
971217 |
label = gtk_label_new (name);
|
|
Packit |
971217 |
g_free (name);
|
|
Packit |
971217 |
gtk_grid_attach (GTK_GRID (layout), label, 0, 0, 1, 1);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gtk_grid_attach (GTK_GRID (layout), gtk_label_new ("|"), 1, 0, 1, 1);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
name = g_path_get_basename (file_name2);
|
|
Packit |
971217 |
if ((ext = strrchr (name, '.')))
|
|
Packit |
971217 |
*ext = '\0';
|
|
Packit |
971217 |
label = gtk_label_new (name);
|
|
Packit |
971217 |
g_free (name);
|
|
Packit |
971217 |
gtk_grid_attach (GTK_GRID (layout), label, 2, 0, 1, 1);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
/* mix slider */
|
|
Packit |
971217 |
scale =
|
|
Packit |
971217 |
gtk_scale_new_with_range (GTK_ORIENTATION_HORIZONTAL, 0.0, 1.0,
|
|
Packit |
971217 |
1.0 / 200.0);
|
|
Packit |
971217 |
gtk_range_set_value (GTK_RANGE (scale), 0.0);
|
|
Packit |
971217 |
gtk_widget_set_size_request (scale, 200, -1);
|
|
Packit |
971217 |
gtk_widget_set_hexpand (scale, TRUE);
|
|
Packit |
971217 |
gtk_grid_attach (GTK_GRID (layout), scale, 0, 1, 3, 1);
|
|
Packit |
971217 |
g_signal_connect (scale, "value-changed",
|
|
Packit |
971217 |
G_CALLBACK (value_changed_callback), volume);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gtk_widget_show_all (GTK_WIDGET (window));
|
|
Packit |
971217 |
}
|
|
Packit |
971217 |
|
|
Packit |
971217 |
static void
|
|
Packit |
971217 |
message_received (GstBus * bus, GstMessage * message, GstPipeline * pipeline)
|
|
Packit |
971217 |
{
|
|
Packit |
971217 |
const GstStructure *s;
|
|
Packit |
971217 |
|
|
Packit |
971217 |
s = gst_message_get_structure (message);
|
|
Packit |
971217 |
g_print ("message from \"%s\" (%s): ",
|
|
Packit |
971217 |
GST_STR_NULL (GST_ELEMENT_NAME (GST_MESSAGE_SRC (message))),
|
|
Packit |
971217 |
gst_message_type_get_name (GST_MESSAGE_TYPE (message)));
|
|
Packit |
971217 |
if (s) {
|
|
Packit |
971217 |
gchar *sstr;
|
|
Packit |
971217 |
|
|
Packit |
971217 |
sstr = gst_structure_to_string (s);
|
|
Packit |
971217 |
g_print ("%s\n", sstr);
|
|
Packit |
971217 |
g_free (sstr);
|
|
Packit |
971217 |
} else {
|
|
Packit |
971217 |
g_print ("no message details\n");
|
|
Packit |
971217 |
}
|
|
Packit |
971217 |
}
|
|
Packit |
971217 |
|
|
Packit |
971217 |
static void
|
|
Packit |
971217 |
eos_message_received (GstBus * bus, GstMessage * message,
|
|
Packit |
971217 |
GstPipeline * pipeline)
|
|
Packit |
971217 |
{
|
|
Packit |
971217 |
message_received (bus, message, pipeline);
|
|
Packit |
971217 |
gtk_main_quit ();
|
|
Packit |
971217 |
}
|
|
Packit |
971217 |
|
|
Packit |
971217 |
static void
|
|
Packit |
971217 |
dynamic_link (GstPadTemplate * templ, GstPad * newpad, gpointer user_data)
|
|
Packit |
971217 |
{
|
|
Packit |
971217 |
GstPad *target = GST_PAD (user_data);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_pad_link (newpad, target);
|
|
Packit |
971217 |
gst_object_unref (target);
|
|
Packit |
971217 |
}
|
|
Packit |
971217 |
|
|
Packit |
971217 |
static void
|
|
Packit |
971217 |
make_mixer_channel (GstElement * pipeline, GstElement * mix, gchar * file_name)
|
|
Packit |
971217 |
{
|
|
Packit |
971217 |
GstElement *filesrc, *decodebin, *volume, *convert, *format;
|
|
Packit |
971217 |
GstCaps *caps;
|
|
Packit |
971217 |
|
|
Packit |
971217 |
/* prepare mixer channel */
|
|
Packit |
971217 |
filesrc = gst_element_factory_make ("filesrc", NULL);
|
|
Packit |
971217 |
decodebin = gst_element_factory_make ("decodebin", NULL);
|
|
Packit |
971217 |
volume = gst_element_factory_make ("volume", NULL);
|
|
Packit |
971217 |
convert = gst_element_factory_make ("audioconvert", NULL);
|
|
Packit |
971217 |
format = gst_element_factory_make ("capsfilter", NULL);
|
|
Packit |
971217 |
gst_bin_add_many (GST_BIN (pipeline), filesrc, decodebin, volume, convert,
|
|
Packit |
971217 |
format, NULL);
|
|
Packit |
971217 |
gst_element_link (filesrc, decodebin);
|
|
Packit |
971217 |
gst_element_link_many (volume, convert, format, mix, NULL);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
/* configure elements */
|
|
Packit |
971217 |
g_object_set (filesrc, "location", file_name, NULL);
|
|
Packit |
971217 |
g_object_set (volume, "volume", (num_vol == 0) ? 1.0 : 0.0, NULL);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
caps = gst_caps_from_string ("audio/x-raw, "
|
|
Packit |
971217 |
"format = (string) S16LE, " "channels = (int) 2");
|
|
Packit |
971217 |
g_object_set (format, "caps", caps, NULL);
|
|
Packit |
971217 |
gst_caps_unref (caps);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
/* remember volume element */
|
|
Packit |
971217 |
volumes[num_vol++] = (GObject *) volume;
|
|
Packit |
971217 |
|
|
Packit |
971217 |
/* handle dynamic pads */
|
|
Packit |
971217 |
g_signal_connect (G_OBJECT (decodebin), "pad-added",
|
|
Packit |
971217 |
G_CALLBACK (dynamic_link), gst_element_get_static_pad (volume, "sink"));
|
|
Packit |
971217 |
}
|
|
Packit |
971217 |
|
|
Packit |
971217 |
int
|
|
Packit |
971217 |
main (int argc, char *argv[])
|
|
Packit |
971217 |
{
|
|
Packit |
971217 |
GstElement *pipeline = NULL;
|
|
Packit |
971217 |
GstElement *mix, *convert, *sink;
|
|
Packit |
971217 |
GstBus *bus;
|
|
Packit |
971217 |
|
|
Packit |
971217 |
if (argc < 3) {
|
|
Packit |
971217 |
g_print ("Usage: audiomix <file1> <file2>\n");
|
|
Packit |
971217 |
return 1;
|
|
Packit |
971217 |
}
|
|
Packit |
971217 |
|
|
Packit |
971217 |
gst_init (&argc, &argv);
|
|
Packit |
971217 |
gtk_init (&argc, &argv);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
/* prepare tail of pipeline */
|
|
Packit |
971217 |
pipeline = gst_pipeline_new ("audiomix");
|
|
Packit |
971217 |
mix = gst_element_factory_make ("adder", NULL);
|
|
Packit |
971217 |
convert = gst_element_factory_make ("audioconvert", NULL);
|
|
Packit |
971217 |
sink = gst_element_factory_make ("autoaudiosink", NULL);
|
|
Packit |
971217 |
gst_bin_add_many (GST_BIN (pipeline), mix, convert, sink, NULL);
|
|
Packit |
971217 |
gst_element_link_many (mix, convert, sink, NULL);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
/* prepare mixer channel strips */
|
|
Packit |
971217 |
make_mixer_channel (pipeline, mix, argv[1]);
|
|
Packit |
971217 |
make_mixer_channel (pipeline, mix, argv[2]);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
/* setup message handling */
|
|
Packit |
971217 |
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
|
|
Packit |
971217 |
gst_bus_add_signal_watch_full (bus, G_PRIORITY_HIGH);
|
|
Packit |
971217 |
g_signal_connect (bus, "message::error", (GCallback) message_received,
|
|
Packit |
971217 |
pipeline);
|
|
Packit |
971217 |
g_signal_connect (bus, "message::warning", (GCallback) message_received,
|
|
Packit |
971217 |
pipeline);
|
|
Packit |
971217 |
g_signal_connect (bus, "message::eos", (GCallback) eos_message_received,
|
|
Packit |
971217 |
pipeline);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
/* setup GUI */
|
|
Packit |
971217 |
setup_gui (pipeline, argv[1], argv[2]);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
/* go to main loop */
|
|
Packit |
971217 |
gst_element_set_state (pipeline, GST_STATE_PLAYING);
|
|
Packit |
971217 |
gtk_main ();
|
|
Packit |
971217 |
gst_element_set_state (pipeline, GST_STATE_NULL);
|
|
Packit |
971217 |
gst_object_unref (pipeline);
|
|
Packit |
971217 |
gst_object_unref (bus);
|
|
Packit |
971217 |
|
|
Packit |
971217 |
return 0;
|
|
Packit |
971217 |
}
|