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 21 #ifndef __GST_CUTTER_H__ 22 #define __GST_CUTTER_H__ 23 24 25 #include <gst/gst.h> 26 /* #include <gst/meta/audioraw.h> */ 27 28 29 #ifdef __cplusplus 30 extern "C" { 31 #endif /* __cplusplus */ 32 33 34 #define GST_TYPE_CUTTER \ 35 (gst_cutter_get_type()) 36 #define GST_CUTTER(obj) \ 37 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CUTTER,GstCutter)) 38 #define GST_CUTTER_CLASS(klass) \ 39 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CUTTER,GstCutterClass)) 40 #define GST_IS_CUTTER(obj) \ 41 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CUTTER)) 42 #define GST_IS_CUTTER_CLASS(klass) \ 43 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CUTTER)) 44 45 typedef struct _GstCutter GstCutter; 46 typedef struct _GstCutterClass GstCutterClass; 47 48 struct _GstCutter 49 { 50 GstElement element; 51 52 GstPad *sinkpad, *srcpad; 53 54 double threshold_level; /* level below which to cut */ 55 double threshold_length; /* how long signal has to remain 56 * below this level before cutting */ 57 double silent_run_length; /* how long has it been below threshold ? */ 58 gboolean silent; 59 gboolean silent_prev; 60 61 double pre_length; /* how long can the pre-record buffer be ? */ 62 double pre_run_length; /* how long is it currently ? */ 63 GList *pre_buffer; /* list of GstBuffers in pre-record buffer */ 64 gboolean leaky; /* do we leak an overflowing prebuffer ? */ 65 66 GstAudioInfo info; 67 }; 68 69 struct _GstCutterClass 70 { 71 GstElementClass parent_class; 72 void (*cut_start) (GstCutter* filter); 73 void (*cut_stop) (GstCutter* filter); 74 }; 75 76 GType gst_cutter_get_type (void); 77 78 GST_ELEMENT_REGISTER_DECLARE (cutter); 79 80 #ifdef __cplusplus 81 } 82 #endif /* __cplusplus */ 83 84 85 #endif /* __GST_STEREO_H__ */ 86