accurate dB/log patch from Carl, back-ported from 3.0

[ardour.git] / gtk2_ardour / canvas-waveview.c

diff --git a/gtk2_ardour/canvas-waveview.c b/gtk2_ardour/canvas-waveview.c
index f929b3119759618a2213d38928de5ad9192e8e79..29cc8502333ba79ad2759ef17750f75e7047ffee 100644 (file)
--- a/gtk2_ardour/canvas-waveview.c
+++ b/gtk2_ardour/canvas-waveview.c
@@ -645,15 +645,15 @@ gnome_canvas_waveview_ensure_cache (GnomeCanvasWaveView *waveview, gulong start_
                for (n = 0; n < cache->data_size; ++n) {
 
                        if (buf[n].max > 0.0f) {
-                               buf[n].max = alt_log_meter(coefficient_to_dB(buf[n].max));
+                               buf[n].max = alt_log_meter(fast_coefficient_to_dB(buf[n].max));
                        } else if (buf[n].max < 0.0f) {
-                               buf[n].max = -alt_log_meter(coefficient_to_dB(-buf[n].max));
+                               buf[n].max = -alt_log_meter(fast_coefficient_to_dB(-buf[n].max));
                        }
                        
                        if (buf[n].min > 0.0f) {
-                               buf[n].min = alt_log_meter(coefficient_to_dB(buf[n].min));
+                               buf[n].min = alt_log_meter(fast_coefficient_to_dB(buf[n].min));
                        } else if (buf[n].min < 0.0f) {
-                               buf[n].min = -alt_log_meter(coefficient_to_dB(-buf[n].min));
+                               buf[n].min = -alt_log_meter(fast_coefficient_to_dB(-buf[n].min));
                        }
                }
        }