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/* GStreamer pitch controller element
* Copyright (C) 2006 Wouter Paesen <wouter@blue-gate.be>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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_PITCH_H__
#define __GST_PITCH_H__
#include <gst/gst.h>
#include <gst/audio/audio.h>
G_BEGIN_DECLS
#define GST_TYPE_PITCH \
(gst_pitch_get_type())
#define GST_PITCH(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PITCH,GstPitch))
#define GST_PITCH_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PITCH,GstPitchClass))
#define GST_IS_PITCH(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PITCH))
#define GST_IS_PITCH_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PITCH))
typedef struct _GstPitch GstPitch;
typedef struct _GstPitchClass GstPitchClass;
typedef struct _GstPitchPrivate GstPitchPrivate;
struct _GstPitch
{
GstElement element;
GstPad *srcpad;
GstPad *sinkpad;
/* parameter values */
gfloat tempo; /* time stretch
* change the duration, without affecting the pitch
* > 1 makes the stream shorter
*/
gfloat rate; /* change playback rate
* resample
* > 1 makes the stream shorter
*/
gfloat out_seg_rate; /* change output segment rate
* Affects playback when input
* segments have rate != out_rate
*/
gfloat pitch; /* change pitch
* change the pitch without affecting the
* duration, stream length doesn't change
*/
gfloat seg_arate; /* Rate to apply from input segment */
/* values extracted from caps */
GstAudioInfo info;
/* stream tracking */
GstClockTime next_buffer_time;
gint64 next_buffer_offset;
GstClockTimeDiff min_latency, max_latency;
GstPitchPrivate *priv;
};
struct _GstPitchClass
{
GstElementClass parent_class;
};
GType gst_pitch_get_type (void);
G_END_DECLS
#endif /* __GST_PITCH_H__ */
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