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1f32369451
Introduce a new max-delay property that can only be set before going to PLAYING or PAUSED. This is used to limit the maximum delay and is set to the current delay by default. Using this will make sure that we have enough data in our internal ringbuffer for the echo. With dynamic reallocation of the ringbuffer as used before silence could've been used as the echo directly after setting a new delay.
70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/*
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* GStreamer
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* Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_AUDIO_ECHO_H__
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#define __GST_AUDIO_ECHO_H__
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#include <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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#include <gst/audio/audio.h>
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#include <gst/audio/gstaudiofilter.h>
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G_BEGIN_DECLS
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#define GST_TYPE_AUDIO_ECHO (gst_audio_echo_get_type())
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#define GST_AUDIO_ECHO(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_AUDIO_ECHO,GstAudioEcho))
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#define GST_IS_AUDIO_ECHO(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_AUDIO_ECHO))
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#define GST_AUDIO_ECHO_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass) ,GST_TYPE_AUDIO_ECHO,GstAudioEchoClass))
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#define GST_IS_AUDIO_ECHO_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass) ,GST_TYPE_AUDIO_ECHO))
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#define GST_AUDIO_ECHO_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj) ,GST_TYPE_AUDIO_ECHO,GstAudioEchoClass))
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typedef struct _GstAudioEcho GstAudioEcho;
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typedef struct _GstAudioEchoClass GstAudioEchoClass;
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typedef void (*GstAudioEchoProcessFunc) (GstAudioEcho *, guint8 *, guint);
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struct _GstAudioEcho
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{
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GstAudioFilter audiofilter;
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guint64 delay;
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guint64 max_delay;
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gfloat intensity;
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gfloat feedback;
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/* < private > */
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GstAudioEchoProcessFunc process;
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guint delay_frames;
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guint8 *buffer;
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guint buffer_pos;
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guint buffer_size;
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guint buffer_size_frames;
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};
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struct _GstAudioEchoClass
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{
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GstAudioFilterClass parent;
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};
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GType gst_audio_echo_get_type (void);
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G_END_DECLS
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#endif /* __GST_AUDIO_ECHO_H__ */
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