commit c44b241509c0aec7b22d70f56507c659e31fdaca
Author: Simon Budig <simon@budig.de>
Date:   Sun Jun 10 19:40:18 2012 +0200

    force buffer refresh, get bigger chunks

diff --git a/soundfumble.c b/soundfumble.c
index af8e568..6d30b51 100644
--- a/soundfumble.c
+++ b/soundfumble.c
@@ -16,7 +16,8 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
-#include <gtk-2.0/gtk/gtk.h>
+
+#include <gtk/gtk.h>
 
 #include <libgimp/gimp.h>
 #include <libgimp/gimpui.h>
@@ -27,6 +28,8 @@
 #include <gegl-types.h>
 #include <gegl-buffer-iterator.h>
 
+#define N_ROWS 8
+
 typedef struct
 {
   gint samplerate;
@@ -94,7 +97,7 @@ query (void)
     "Copyright amir@viel-zu.org",
     "2011",
     "_Sound Fumble",
-    "RGB*, GRAY*",
+    "*",
     GIMP_PLUGIN,
     G_N_ELEMENTS (args), 0,
     args, NULL);
@@ -191,7 +194,8 @@ fumble (gint32 drawable_id)
   gint width, height, bpp;
   gint type;
   gint tile_height;
-  guchar *row;
+  guchar *rows;
+  gint buflen;
   gint channels;
 
   /* get the gegl buffer of the specified image */
@@ -199,8 +203,9 @@ fumble (gint32 drawable_id)
   buffer_format = gegl_buffer_get_format(buffer);
   width = gegl_buffer_get_width (buffer);
   height = gegl_buffer_get_height (buffer);
-  type = gimp_drawable_type (drawable_id);
-  row = g_new (guchar, width * bpp);
+  bpp = babl_format_get_bytes_per_pixel (buffer_format);
+  buflen = width * bpp * N_ROWS;
+  rows = g_new (guchar, buflen);
 
 /*
   gimp_drawable_mask_bounds (drawable_id,
@@ -217,23 +222,39 @@ fumble (gint32 drawable_id)
     end = pcmconf.lines;
 
   while (pcmconf.loop == -1 || (loops++ <= pcmconf.loop)) {
-    for (begin = 0; begin < height; begin++) {
+    for (begin = 0; begin < height; begin += N_ROWS) {
       if(begin % (height/100) == 0)
         gimp_progress_update(((gdouble) begin) / height);
-      gegl_buffer_get(buffer, GEGL_RECTANGLE (0, begin, width, 1), 1.0,
-          buffer_format, row, GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
 
-      gint off;
-      gint len = 1024;
+      gegl_buffer_get(buffer,
+                      GEGL_RECTANGLE (0, begin, width,
+                                      MIN (N_ROWS, height - begin)),
+                      1.0, buffer_format, rows,
+                      GEGL_AUTO_ROWSTRIDE, GEGL_ABYSS_NONE);
 
-      for(off = 0; off < width; off+=len) {
-        pcm_write(row + off, len);
-      }
+      gint off;
+      gint len = MIN (N_ROWS, height - begin) * bpp * width;
+
+      for (off = 0; off < len;)
+        off += pcm_write (rows + off, len - off);
+
+      g_object_unref (buffer);
+      buffer = gimp_drawable_get_buffer(drawable_id);
+      buffer_format = gegl_buffer_get_format(buffer);
+      width = gegl_buffer_get_width (buffer);
+      height = gegl_buffer_get_height (buffer);
+      bpp = babl_format_get_bytes_per_pixel (buffer_format);
+      if (buflen != width * bpp * N_ROWS)
+        {
+          g_free (rows);
+          buflen = width * bpp * N_ROWS;
+          rows = g_new (guchar, buflen);
+        }
     }
   }
 
   gimp_progress_update(1);
-  g_free (row);
+  g_free (rows);
   g_object_unref (buffer);
 
   playback_quit();