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/*
* GStreamer
* Copyright (C) 2008 Rov Juvano <rovjuvano@users.sourceforge.net>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_SCALETEMPO_H__
#define __GST_SCALETEMPO_H__
#include <gst/gst.h>
#include <gst/base/gstbasetransform.h>
G_BEGIN_DECLS
#define GST_TYPE_SCALETEMPO (gst_scaletempo_get_type())
#define GST_SCALETEMPO(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_SCALETEMPO, GstScaletempo))
#define GST_SCALETEMPO_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_SCALETEMPO, GstScaletempoClass))
#define GST_IS_SCALETEMPO(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_SCALETEMPO))
#define GST_IS_SCALETEMPO_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_SCALETEMPO))
typedef struct _GstScaletempo GstScaletempo;
typedef struct _GstScaletempoClass GstScaletempoClass;
typedef struct _GstScaletempoPrivate GstScaletempoPrivate;
struct _GstScaletempo
{
GstBaseTransform element;
gdouble scale;
gboolean reverse;
/* parameters */
guint ms_stride;
gdouble percent_overlap;
guint ms_search;
/* caps */
GstAudioFormat format;
guint samples_per_frame; /* AKA number of channels */
guint bytes_per_sample;
guint bytes_per_frame;
guint sample_rate;
/* stride */
gdouble frames_stride_scaled;
gdouble frames_stride_error;
guint bytes_stride;
gdouble bytes_stride_scaled;
guint bytes_queue_max;
guint bytes_queued;
guint bytes_to_slide;
gint8 *buf_queue;
/* overlap */
guint samples_overlap;
guint samples_standing;
guint bytes_overlap;
guint bytes_standing;
gpointer buf_overlap;
gpointer table_blend;
void (*output_overlap) (GstScaletempo * scaletempo, gpointer out_buf, guint bytes_off);
/* best overlap */
guint frames_search;
gpointer buf_pre_corr;
gpointer table_window;
guint (*best_overlap_offset) (GstScaletempo * scaletempo);
/* gstreamer */
GstSegment in_segment, out_segment;
GstClockTime latency;
/* threads */
gboolean reinit_buffers;
};
struct _GstScaletempoClass
{
GstBaseTransformClass parent_class;
};
GType gst_scaletempo_get_type (void);
G_END_DECLS
#endif /* __GST_SCALETEMPO_H__ */