1 /* GStreamer

     2  * Copyright (C) 2005-2006 Tim-Philipp Müller <tim centricular net>

     3  *

     4  * This library is free software; you can redistribute it and/or

     5  * modify it under the terms of the GNU Library General Public

     6  * License as published by the Free Software Foundation; either

     7  * version 2 of the License, or (at your option) any later version.

     8  *

     9  * This library is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    12  * Library General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU Library General Public

    15  * License along with this library; if not, write to the

    16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,

    17  * Boston, MA 02111-1307, USA.

    18  */

    19 

    20 #ifndef __GST_AUDIO_MIXERUTILS_H__

    21 #define __GST_AUDIO_MIXERUTILS_H__

    22 

    23 #include <gst/gst.h>

    24 #include <gst/interfaces/mixer.h>

    25 

    26 G_BEGIN_DECLS

    27 

    28 /**

    29  * GstAudioMixerFilterFunc:

    30  * @mixer: a #GstElement implementing the #GstMixer interface

    31  * @user_data: user data

    32  *

    33  * Function that will be called by gst_audio_default_registry_mixer_filter()

    34  * so the caller can decide which mixer elements should be kept and returned.

    35  * When the mixer element is passed to the callback function, it is opened

    36  * and in READY state. If you decide to keep the element, you need to set it

    37  * back to NULL state yourself (unless you want to keep it opened of course).

    38  *

    39  * Returns: TRUE if the element should be kept, FALSE otherwise.

    40  */

    41 typedef gboolean (*GstAudioMixerFilterFunc) (GstMixer * mixer, gpointer user_data);

    42 #ifdef __SYMBIAN32__

    43 IMPORT_C

    44 #endif

    45 

    46 

    47 

    48 GList * gst_audio_default_registry_mixer_filter (GstAudioMixerFilterFunc  filter_func,

    49                                                  gboolean                 first,

    50                                                  gpointer                 user_data);

    51 

    52 G_END_DECLS

    53 

    54 #endif /* __GST_AUDIO_MIXERUTILS_H__ */