Initial import of gtk2_ardour.

git-svn-id: svn://localhost/trunk/ardour2@24 d708f5d6-7413-0410-9779-e7cbd77b26cf

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__ */