mutter/clutter/clutter-media.c
Emmanuele Bassi 7c6ae80bfe 2008-11-07 Emmanuele Bassi <ebassi@linux.intel.com>
* clutter/clutter-media.c: Improve documentation of the
	ClutterMedia interface.
2008-11-07 18:00:59 +00:00

444 lines
9.9 KiB
C

/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2006 OpenedHand
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*/
/**
* SECTION:clutter-media
* @short_description: An interface for controlling playback of media data.
*
* #ClutterMedia is an interface for controlling playback of media sources.
*
* It is not implemented inside Clutter, but other integration libraries
* like Clutter-GStreamer, implement it to offer a uniform API for
* applications.
*
* ClutterMedia is available since Clutter 0.2
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-media.h"
#include "clutter-main.h"
#include "clutter-enum-types.h"
#include "clutter-private.h" /* for DBG */
enum
{
EOS,
ERROR,
LAST_SIGNAL
};
static void clutter_media_base_init (gpointer g_class);
static guint media_signals[LAST_SIGNAL] = { 0, };
GType
clutter_media_get_type (void)
{
static GType media_type = 0;
if (!media_type)
{
static const GTypeInfo media_info =
{
sizeof (ClutterMediaInterface),
clutter_media_base_init,
NULL,
};
media_type = g_type_register_static (G_TYPE_INTERFACE, "ClutterMedia",
&media_info, 0);
}
return media_type;
}
static void
clutter_media_base_init (gpointer g_iface)
{
static gboolean initialized = FALSE;
if (G_UNLIKELY (!initialized))
{
initialized = TRUE;
/* props */
g_object_interface_install_property
(g_iface,
g_param_spec_string
("uri",
"URI",
"The loaded URI.",
NULL,
G_PARAM_READWRITE |
G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK |
G_PARAM_STATIC_BLURB));
g_object_interface_install_property
(g_iface,
g_param_spec_boolean
("playing",
"Playing",
"TRUE if playing.",
FALSE,
G_PARAM_READWRITE |
G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK |
G_PARAM_STATIC_BLURB));
g_object_interface_install_property
(g_iface,
g_param_spec_int
("position",
"Position",
"The position in the current stream in seconds.",
0, G_MAXINT, 0,
G_PARAM_READWRITE |
G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK |
G_PARAM_STATIC_BLURB));
g_object_interface_install_property
(g_iface,
g_param_spec_double
("volume",
"Volume",
"The audio volume.",
0, 100, 50,
G_PARAM_READWRITE |
G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK |
G_PARAM_STATIC_BLURB));
g_object_interface_install_property
(g_iface,
g_param_spec_boolean
("can-seek",
"Can seek",
"TRUE if the current stream is seekable.",
FALSE,
G_PARAM_READABLE |
G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK |
G_PARAM_STATIC_BLURB));
g_object_interface_install_property
(g_iface,
g_param_spec_int
("buffer-percent",
"Buffer percent",
"The percentage the current stream buffer is filled.",
0, 100, 0,
G_PARAM_READABLE |
G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK |
G_PARAM_STATIC_BLURB));
g_object_interface_install_property
(g_iface,
g_param_spec_int
("duration",
"Duration",
"The duration of the current stream in seconds.",
0, G_MAXINT, 0,
G_PARAM_READABLE |
G_PARAM_STATIC_NAME | G_PARAM_STATIC_NICK |
G_PARAM_STATIC_BLURB));
/**
* ClutterMedia::eos:
* @media: the #ClutterMedia instance that received the signal
*
* The ::eos signal is emitted each time the media stream ends.
*
* Since: 0.2
*/
media_signals[EOS] =
g_signal_new ("eos",
CLUTTER_TYPE_MEDIA,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterMediaInterface, eos),
NULL, NULL,
g_cclosure_marshal_VOID__VOID,
G_TYPE_NONE, 0);
/**
* ClutterMedia::error:
* @media: the #ClutterMedia instance that received the signal
* @error: the #GError
*
* The ::error signal is emitted each time an error occurred.
*
* Since: 0.2
*/
media_signals[ERROR] =
g_signal_new ("error",
CLUTTER_TYPE_MEDIA,
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (ClutterMediaInterface, error),
NULL, NULL,
g_cclosure_marshal_VOID__POINTER,
G_TYPE_NONE, 1,
G_TYPE_POINTER);
}
}
/**
* clutter_media_set_uri:
* @media: #ClutterMedia object
* @uri: URI
*
* Sets the URI of @media to @uri.
*
* Since: 0.2
*/
void
clutter_media_set_uri (ClutterMedia *media,
const char *uri)
{
g_return_if_fail (CLUTTER_IS_MEDIA(media));
CLUTTER_MEDIA_GET_INTERFACE (media)->set_uri (media, uri);
}
/**
* clutter_media_get_uri:
* @media: A #ClutterMedia object
*
* Retrieves the URI from @media.
*
* Return value: The URI as a string.
*
* Since: 0.2
*/
const char*
clutter_media_get_uri (ClutterMedia *media)
{
g_return_val_if_fail (CLUTTER_IS_MEDIA(media), NULL);
return CLUTTER_MEDIA_GET_INTERFACE (media)->get_uri (media);
}
/**
* clutter_media_set_playing:
* @media: A #ClutterMedia object
* @playing: TRUE to start playing, FALSE to stop.
*
* Starts or stops @media playing.
*
* Since: 0.2
*/
void
clutter_media_set_playing (ClutterMedia *media,
gboolean playing)
{
g_return_if_fail (CLUTTER_IS_MEDIA(media));
CLUTTER_MEDIA_GET_INTERFACE (media)->set_playing (media, playing);
}
/**
* clutter_media_get_playing:
* @media: A #ClutterMedia object
*
* Retrieves the playing status of @media.
*
* Return value: %TRUE if playing, %FALSE if stopped.
*
* Since: 0.2
*/
gboolean
clutter_media_get_playing (ClutterMedia *media)
{
g_return_val_if_fail (CLUTTER_IS_MEDIA(media), FALSE);
return CLUTTER_MEDIA_GET_INTERFACE (media)->get_playing (media);
}
/**
* clutter_media_set_position:
* @media: A #ClutterMedia object
* @position: The desired position.
*
* Sets the playback position of @media to @position.
*
* Since: 0.2
*/
void
clutter_media_set_position (ClutterMedia *media,
int position)
{
g_return_if_fail (CLUTTER_IS_MEDIA(media));
CLUTTER_MEDIA_GET_INTERFACE (media)->set_position (media, position);
}
/**
* clutter_media_get_position:
* @media: A #ClutterMedia object
*
* Retrieves the position of @media.
*
* Return value: The playback position.
*
* Since: 0.2
*/
int
clutter_media_get_position (ClutterMedia *media)
{
g_return_val_if_fail (CLUTTER_IS_MEDIA(media), 0);
return CLUTTER_MEDIA_GET_INTERFACE (media)->get_position (media);
}
/**
* clutter_media_set_volume:
* @media: A #ClutterMedia object
* @volume: The volume as a double between 0.0 and 1.0
*
* Sets the playback volume of @media to @volume.
*
* Since: 0.2
*/
void
clutter_media_set_volume (ClutterMedia *media,
double volume)
{
g_return_if_fail (CLUTTER_IS_MEDIA(media));
CLUTTER_MEDIA_GET_INTERFACE (media)->set_volume (media, volume);
}
/**
* clutter_media_get_volume:
* @media: A #ClutterMedia object
*
* Retrieves the playback volume of @media.
*
* Return value: The playback volume between 0.0 and 1.0
*
* Since: 0.2
*/
double
clutter_media_get_volume (ClutterMedia *media)
{
g_return_val_if_fail (CLUTTER_IS_MEDIA(media), 0.0);
return CLUTTER_MEDIA_GET_INTERFACE (media)->get_volume (media);
}
/**
* clutter_media_get_can_seek:
* @media: A #ClutterMedia object
*
* Retrieves whether @media is seekable or not.
*
* Return value: %TRUE if @media can seek, %FALSE otherwise.
*
* Since: 0.2
*/
gboolean
clutter_media_get_can_seek (ClutterMedia *media)
{
g_return_val_if_fail (CLUTTER_IS_MEDIA(media), FALSE);
return CLUTTER_MEDIA_GET_INTERFACE (media)->can_seek (media);
}
/**
* clutter_media_get_buffer_percent:
* @media: A #ClutterMedia object
*
* Retrieves the amount of the stream that is buffered.
*
* Return value: percentage value
*
* Since: 0.2
*/
int
clutter_media_get_buffer_percent (ClutterMedia *media)
{
g_return_val_if_fail (CLUTTER_IS_MEDIA(media), 0);
return CLUTTER_MEDIA_GET_INTERFACE (media)->get_buffer_percent (media);
}
/**
* clutter_media_get_duration:
* @media: A #ClutterMedia object
*
* Retrieves the duration of the media stream that @media represents.
*
* Return value: The length of the media stream.
*
* Since: 0.2
*/
int
clutter_media_get_duration (ClutterMedia *media)
{
g_return_val_if_fail (CLUTTER_IS_MEDIA(media), 0);
return CLUTTER_MEDIA_GET_INTERFACE (media)->get_duration (media);
}
/* helper funcs */
/**
* clutter_media_set_filename:
* @media: A #ClutterMedia object
* @filename: A filename to media file.
*
* Sets the filename of the media source.
*
* Since: 0.2
*/
void
clutter_media_set_filename (ClutterMedia *media,
const gchar *filename)
{
gchar *uri;
GError *uri_error = NULL;
if (!g_path_is_absolute (filename))
{
gchar *abs_path;
abs_path = g_build_filename (g_get_current_dir (), filename, NULL);
uri = g_filename_to_uri (abs_path, NULL, &uri_error);
g_free (abs_path);
}
else
uri = g_filename_to_uri (filename, NULL, &uri_error);
if (uri_error)
{
g_signal_emit (media, media_signals[ERROR], 0, uri_error);
g_error_free (uri_error);
return;
}
clutter_media_set_uri (media, uri);
g_free (uri);
}