1 /* GStreamer 2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu> 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., 51 Franklin St, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 */ 19 20 #ifndef __GST_AUDIO_AUDIO_H__ 21 #include <gst/audio/audio.h> 22 #endif 23 24 #ifndef __GST_AUDIO_FILTER_H__ 25 #define __GST_AUDIO_FILTER_H__ 26 27 #include <gst/gst.h> 28 #include <gst/base/gstbasetransform.h> 29 30 G_BEGIN_DECLS 31 32 typedef struct _GstAudioFilter GstAudioFilter; 33 typedef struct _GstAudioFilterClass GstAudioFilterClass; 34 35 #define GST_TYPE_AUDIO_FILTER \ 36 (gst_audio_filter_get_type()) 37 #define GST_AUDIO_FILTER(obj) \ 38 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_FILTER,GstAudioFilter)) 39 #define GST_AUDIO_FILTER_CAST(obj) \ 40 ((GstAudioFilter *) (obj)) 41 #define GST_AUDIO_FILTER_CLASS(klass) \ 42 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_AUDIO_FILTER,GstAudioFilterClass)) 43 #define GST_AUDIO_FILTER_CLASS_CAST(klass) \ 44 ((GstAudioFilterClass *) (klass)) 45 #define GST_AUDIO_FILTER_GET_CLASS(obj) \ 46 (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_AUDIO_FILTER,GstAudioFilterClass)) 47 #define GST_IS_AUDIO_FILTER(obj) \ 48 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_FILTER)) 49 #define GST_IS_AUDIO_FILTER_CLASS(klass) \ 50 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_AUDIO_FILTER)) 51 52 /** 53 * GstAudioFilter: 54 * 55 * Base class for audio filters with the same format for input and output. 56 */ 57 struct _GstAudioFilter { 58 GstBaseTransform basetransform; 59 60 /*< protected >*/ 61 GstAudioInfo info; /* currently configured format */ 62 63 /*< private >*/ 64 gpointer _gst_reserved[GST_PADDING]; 65 }; 66 67 #define GST_AUDIO_FILTER_INFO(filter) (&GST_AUDIO_FILTER_CAST(filter)->info) 68 69 #define GST_AUDIO_FILTER_FORMAT(filter) (GST_AUDIO_INFO_FORMAT(GST_AUDIO_FILTER_INFO(filter))) 70 #define GST_AUDIO_FILTER_RATE(filter) (GST_AUDIO_INFO_RATE(GST_AUDIO_FILTER_INFO(filter))) 71 #define GST_AUDIO_FILTER_CHANNELS(filter) (GST_AUDIO_INFO_CHANNELS(GST_AUDIO_FILTER_INFO(filter))) 72 #define GST_AUDIO_FILTER_BPF(filter) (GST_AUDIO_INFO_BPF(GST_AUDIO_FILTER_INFO(filter))) 73 #define GST_AUDIO_FILTER_BPS(filter) (GST_AUDIO_INFO_BPS(GST_AUDIO_FILTER_INFO(filter))) 74 75 /** 76 * GstAudioFilterClass: 77 * @basetransformclass: parent class 78 * @setup: virtual function called whenever the format changes 79 * 80 * In addition to the @setup virtual function, you should also override the 81 * GstBaseTransform::transform and/or GstBaseTransform::transform_ip virtual 82 * function. 83 */ 84 85 struct _GstAudioFilterClass { 86 GstBaseTransformClass basetransformclass; 87 88 /* virtual function, called whenever the format changes */ 89 gboolean (*setup) (GstAudioFilter * filter, const GstAudioInfo * info); 90 91 /*< private >*/ 92 gpointer _gst_reserved[GST_PADDING]; 93 }; 94 95 GST_AUDIO_API 96 GType gst_audio_filter_get_type (void); 97 98 GST_AUDIO_API 99 void gst_audio_filter_class_add_pad_templates (GstAudioFilterClass * klass, 100 GstCaps * allowed_caps); 101 102 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstAudioFilter, gst_object_unref) 103 104 G_END_DECLS 105 106 #endif /* __GST_AUDIO_FILTER_H__ */ 107 108