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26b4a028d9
Original commit message from CVS: * ext/soundtouch/gstpitch.cc: * ext/soundtouch/gstpitch.hh: Implement LATENCY query and notify about latency changes. Unfortunately we don't have a fixed latency but it changes a bit with each buffer so we only send an LATENCY event with the maximum latency if it changes. Always calculate the timestamp, duration, etc from the sample rate instead of using a pre-calculated duration for one sample to prevent large rounding errors.
89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
/* 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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/* stream tracking */
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GstClockTime next_buffer_time;
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gint64 next_buffer_offset;
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GstClockTimeDiff min_latency, max_latency;
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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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