restore excess calls to sync-order stuff (for now); allow MIDI controllers to use the same non-linear fader response as the gui; add various flags to PBD::Controllable and remove URI from that class

git-svn-id: svn://localhost/ardour2/branches/3.0@6414 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 16 insertions, 0 deletions

diff --git a/libs/ardour/ardour/utils.h b/libs/ardour/ardour/utils.h
index 6c6f754cf9..e68f7a01df 100644
--- a/libs/ardour/ardour/utils.h
+++ b/libs/ardour/ardour/utils.h
@@ -69,6 +69,22 @@ const char* edit_mode_to_string (ARDOUR::EditMode);
 ARDOUR::EditMode string_to_edit_mode (std::string);
 
 
+static inline double
+gain_to_slider_position (ARDOUR::gain_t g)
+{
+	if (g == 0) return 0;
+	return pow((6.0*log(g)/log(2.0)+192.0)/198.0, 8.0);
+
+}
+
+static inline ARDOUR::gain_t
+slider_position_to_gain (double pos)
+{
+	/* XXX Marcus writes: this doesn't seem right to me. but i don't have a better answer ... */
+	if (pos == 0.0) return 0;
+	return pow (2.0,(sqrt(sqrt(sqrt(pos)))*198.0-192.0)/6.0);
+}
+
 /* I don't really like hard-coding these falloff rates here
  * Probably should use a map of some kind that could be configured
  * These rates are db/sec.