/* * GStreamer * Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ #ifndef __GST_AUDIO_ECHO_H__ #define __GST_AUDIO_ECHO_H__ #include <gst/gst.h> #include <gst/base/gstbasetransform.h> #include <gst/audio/audio.h> #include <gst/audio/gstaudiofilter.h> G_BEGIN_DECLS #define GST_TYPE_AUDIO_ECHO (gst_audio_echo_get_type()) #define GST_AUDIO_ECHO(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_ECHO,GstAudioEcho)) #define GST_IS_AUDIO_ECHO(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_ECHO)) #define GST_AUDIO_ECHO_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_AUDIO_ECHO,GstAudioEchoClass)) #define GST_IS_AUDIO_ECHO_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_AUDIO_ECHO)) #define GST_AUDIO_ECHO_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_AUDIO_ECHO,GstAudioEchoClass)) typedef struct _GstAudioEcho GstAudioEcho; typedef struct _GstAudioEchoClass GstAudioEchoClass; typedef void (*GstAudioEchoProcessFunc) (GstAudioEcho *, guint8 *, guint); struct _GstAudioEcho { GstAudioFilter audiofilter; guint64 delay; guint64 max_delay; gfloat intensity; gfloat feedback; /* < private > */ GstAudioEchoProcessFunc process; guint delay_frames; guint8 *buffer; guint buffer_pos; guint buffer_size; guint buffer_size_frames; GMutex lock; }; struct _GstAudioEchoClass { GstAudioFilterClass parent; }; GType gst_audio_echo_get_type (void); G_END_DECLS #endif /* __GST_AUDIO_ECHO_H__ */