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89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
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/* GStreamer pitch controller element
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* Copyright (C) 2006 Wouter Paesen <wouter@blue-gate.be>
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef __GST_PITCH_H__
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#define __GST_PITCH_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define GST_TYPE_PITCH \
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(gst_pitch_get_type())
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#define GST_PITCH(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_PITCH,GstPitch))
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#define GST_PITCH_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_PITCH,GstPitchClass))
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#define GST_IS_PITCH(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_PITCH))
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#define GST_IS_PITCH_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_PITCH))
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typedef struct _GstPitch GstPitch;
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typedef struct _GstPitchClass GstPitchClass;
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typedef struct _GstPitchPrivate GstPitchPrivate;
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struct _GstPitch
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{
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GstElement element;
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GstPad *srcpad;
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GstPad *sinkpad;
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/* parameter values */
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gfloat tempo; /* time stretch
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* change the duration, without affecting the pitch
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* > 1 makes the stream shorter
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*/
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gfloat rate; /* change playback rate
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* resample
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* > 1 makes the stream shorter
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*/
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gfloat pitch; /* change pitch
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* change the pitch without affecting the
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* duration, stream length doesn't change
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*/
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/* values extracted from caps */
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gint samplerate; /* samplerate */
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gint channels; /* number of audio channels */
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gsize sample_size; /* number of bytes for a single sample */
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GstClockTime sample_duration; /* time for 1 sample */
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/* stream tracking */
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GstClockTime next_buffer_time;
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gint64 next_buffer_offset;
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GstPitchPrivate *priv;
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};
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struct _GstPitchClass
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{
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GstElementClass parent_class;
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};
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GType gst_pitch_get_type (void);
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G_END_DECLS
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#endif /* __GST_PITCH_H__ */
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