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Initial import of gtk2_ardour.

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git-svn-id: svn://localhost/trunk/ardour2@24 d708f5d6-7413-0410-9779-e7cbd77b26cf
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Taybin Rutkin 2005-09-25 18:42:24 +00:00
parent e4b9aed743
commit 209d967b1b
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128
gtk2_ardour/canvas-waveview.h Normal file
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/* gtk-canvas-waveview.h: GtkCanvas item for displaying wave data
*
* Copyright (C) 2001 Paul Davis <pbd@op.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 __GTK_CANVAS_WAVEVIEW_H__
#define __GTK_CANVAS_WAVEVIEW_H__
#include <stdint.h>
#include <gtk-canvas/gtk-canvas-defs.h>
#include "gtk-canvas/gtk-canvas.h"
BEGIN_GTK_CANVAS_DECLS
/* Wave viewer item for canvas.
*/
#define GTK_CANVAS_TYPE_CANVAS_WAVEVIEW (gtk_canvas_waveview_get_type ())
#define GTK_CANVAS_WAVEVIEW(obj) (GTK_CHECK_CAST ((obj), GTK_CANVAS_TYPE_CANVAS_WAVEVIEW, GtkCanvasWaveView))
#define GTK_CANVAS_WAVEVIEW_CLASS(klass) (GTK_CHECK_CLASS_CAST ((klass), GTK_CANVAS_TYPE_CANVAS_WAVEVIEW, GtkCanvasWaveViewClass))
#define GTK_CANVAS_IS_CANVAS_WAVEVIEW(obj) (GTK_CHECK_TYPE ((obj), GTK_CANVAS_TYPE_CANVAS_WAVEVIEW))
#define GTK_CANVAS_IS_CANVAS_WAVEVIEW_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), GTK_CANVAS_TYPE_CANVAS_WAVEVIEW))
typedef struct _GtkCanvasWaveView GtkCanvasWaveView;
typedef struct _GtkCanvasWaveViewClass GtkCanvasWaveViewClass;
typedef struct _GtkCanvasWaveViewChannelInfo GtkCanvasWaveViewChannelInfo;
typedef struct _GtkCanvasWaveViewCacheEntry GtkCanvasWaveViewCacheEntry;
typedef struct _GtkCanvasWaveViewCache GtkCanvasWaveViewCache;
/* XXX this needs to be synced with ardour/source.h PeakData */
struct _GtkCanvasWaveViewCacheEntry
{
float min;
float max;
};
struct _GtkCanvasWaveViewCache
{
GtkCanvasWaveViewCacheEntry* data;
gint32 allocated;
gint32 data_size;
gulong start;
gulong end;
};
GtkCanvasWaveViewCache* gtk_canvas_waveview_cache_new ();
void gtk_canvas_waveview_cache_destroy (GtkCanvasWaveViewCache*);
struct _GtkCanvasWaveView
{
GtkCanvasItem item;
GtkCanvasWaveViewCache *cache;
gboolean cache_updater;
gint screen_width;
void *data_src;
guint32 channel;
void (*peak_function)(void*,gulong,gulong,gulong,gpointer,guint32,double);
gulong (*length_function)(void *);
gulong (*sourcefile_length_function)(void*);
void (*gain_curve_function)(void *arg, double start, double end, float* vector, guint32 veclen);
void *gain_src;
/* x-axis: samples per canvas unit. */
double samples_per_unit;
/* y-axis: amplitude_above_axis.
*
* the default is that an (scaled, normalized -1.0 ... +1.0) amplitude of 1.0
* corresponds to the top of the area assigned to the waveview.
*
* larger values will expand the vertical scale, cutting off the peaks/troughs.
* smaller values will decrease the vertical scale, moving peaks/troughs toward
* the middle of the area assigned to the waveview.
*/
double amplitude_above_axis;
double x;
double y;
double height;
double half_height;
uint32_t wave_color;
char rectified;
/* These are updated by the update() routine
to optimize the render() routine, which may
be called several times after a single update().
*/
int32_t bbox_ulx;
int32_t bbox_uly;
int32_t bbox_lrx;
int32_t bbox_lry;
unsigned char wave_r, wave_g, wave_b, wave_a;
uint32_t samples;
uint32_t region_start;
int32_t reload_cache_in_render;
};
struct _GtkCanvasWaveViewClass {
GtkCanvasItemClass parent_class;
};
GtkType gtk_canvas_waveview_get_type (void);
END_GTK_CANVAS_DECLS
#endif /* __GTK_CANVAS_WAVEVIEW_H__ */