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., 51 Franklin St, Fifth Floor, 18 * Boston, MA 02110-1301, USA. 19 */ 20 21 #ifndef __GST_AUDIO_KARAOKE_H__ 22 #define __GST_AUDIO_KARAOKE_H__ 23 24 #include <gst/gst.h> 25 #include <gst/base/gstbasetransform.h> 26 #include <gst/audio/audio.h> 27 #include <gst/audio/gstaudiofilter.h> 28 29 G_BEGIN_DECLS 30 #define GST_TYPE_AUDIO_KARAOKE (gst_audio_karaoke_get_type()) 31 #define GST_AUDIO_KARAOKE(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_KARAOKE,GstAudioKaraoke)) 32 #define GST_IS_AUDIO_KARAOKE(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_KARAOKE)) 33 #define GST_AUDIO_KARAOKE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_AUDIO_KARAOKE,GstAudioKaraokeClass)) 34 #define GST_IS_AUDIO_KARAOKE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_AUDIO_KARAOKE)) 35 #define GST_AUDIO_KARAOKE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_AUDIO_KARAOKE,GstAudioKaraokeClass)) 36 typedef struct _GstAudioKaraoke GstAudioKaraoke; 37 typedef struct _GstAudioKaraokeClass GstAudioKaraokeClass; 38 39 typedef void (*GstAudioKaraokeProcessFunc) (GstAudioKaraoke *, guint8 *, guint); 40 41 struct _GstAudioKaraoke 42 { 43 GstAudioFilter audiofilter; 44 45 /* properties */ 46 gfloat level; 47 gfloat mono_level; 48 gfloat filter_band; 49 gfloat filter_width; 50 51 /* filter coef */ 52 gfloat A, B, C; 53 gfloat y1, y2; 54 55 /* < private > */ 56 GstAudioKaraokeProcessFunc process; 57 }; 58 59 struct _GstAudioKaraokeClass 60 { 61 GstAudioFilterClass parent; 62 }; 63 64 GType gst_audio_karaoke_get_type (void); 65 66 GST_ELEMENT_REGISTER_DECLARE (audiokaraoke); 67 68 G_END_DECLS 69 #endif /* __GST_AUDIO_KARAOKE_H__ */ 70