1 /* 

     2  * GStreamer

     3  * Copyright (C) 2008 Wim Taymans <wim.taymans@gmail.com>

     4  *

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

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

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

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

     9  *

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

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

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

    13  * Library General Public License for more details.

    14  *

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

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

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

    18  * Boston, MA 02111-1307, USA.

    19  */

    20 

    21 #ifndef __GST_AUDIO_KARAOKE_H__

    22 #define __GST_AUDIO_KARAOKE_H__

    23 

    24 #include <gst/gst.h>

    25 #include <gst/gst_global.h>

    26 #include <gst/base/gstbasetransform.h>

    27 #include <gst/audio/audio.h>

    28 #include <gst/audio/gstaudiofilter.h>

    29 

    30 G_BEGIN_DECLS

    31 #define GST_TYPE_AUDIO_KARAOKE            (gst_audio_karaoke_get_type())

    32 #define GST_AUDIO_KARAOKE(obj)            (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_KARAOKE,GstAudioKaraoke))

    33 #define GST_IS_AUDIO_KARAOKE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_KARAOKE))

    34 #define GST_AUDIO_KARAOKE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_AUDIO_KARAOKE,GstAudioKaraokeClass))

    35 #define GST_IS_AUDIO_KARAOKE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_AUDIO_KARAOKE))

    36 #define GST_AUDIO_KARAOKE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_AUDIO_KARAOKE,GstAudioKaraokeClass))

    37 typedef struct _GstAudioKaraoke GstAudioKaraoke;

    38 typedef struct _GstAudioKaraokeClass GstAudioKaraokeClass;

    39 

    40 typedef void (*GstAudioKaraokeProcessFunc) (GstAudioKaraoke *, guint8 *, guint);

    41 

    42 struct _GstAudioKaraoke

    43 {

    44   GstAudioFilter audiofilter;

    45 

    46   gint channels;

    47   gint rate;

    48 

    49   /* properties */

    50   gfloat level;

    51   gfloat mono_level;

    52   gfloat filter_band;

    53   gfloat filter_width;

    54 

    55   /* filter coef */

    56   gfloat A, B, C;

    57   gfloat y1, y2;

    58 

    59   /* < private > */

    60   GstAudioKaraokeProcessFunc process;

    61 };

    62 

    63 struct _GstAudioKaraokeClass

    64 {

    65   GstAudioFilterClass parent;

    66 };

    67 #ifdef __SYMBIAN32__

    68 IMPORT_C

    69 #endif

    70 

    71 

    72 GType gst_audio_karaoke_get_type (void);

    73 

    74 G_END_DECLS

    75 #endif /* __GST_AUDIO_KARAOKE_H__ */