diff options
author | Taybin Rutkin <taybin@taybin.com> | 2005-09-25 18:42:24 +0000 |
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committer | Taybin Rutkin <taybin@taybin.com> | 2005-09-25 18:42:24 +0000 |
commit | 209d967b1bb80a9735d690d8f4f0455ecb9970ca (patch) | |
tree | 9d76ddcd7c1ac9d91bb2b1a33d31b66ce4ded5de /gtk2_ardour/canvas-waveview.h | |
parent | e4b9aed743fc765219ac775905a221c017c88fba (diff) |
Initial import of gtk2_ardour.
git-svn-id: svn://localhost/trunk/ardour2@24 d708f5d6-7413-0410-9779-e7cbd77b26cf
Diffstat (limited to 'gtk2_ardour/canvas-waveview.h')
-rw-r--r-- | gtk2_ardour/canvas-waveview.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/gtk2_ardour/canvas-waveview.h b/gtk2_ardour/canvas-waveview.h new file mode 100644 index 0000000000..b868abfa61 --- /dev/null +++ b/gtk2_ardour/canvas-waveview.h @@ -0,0 +1,128 @@ +/* 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__ */ |