/* 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); GST_ELEMENT_REGISTER_DECLARE (pitch); G_END_DECLS #endif /* __GST_PITCH_H__ */