X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Fardour%2Futils.h;h=03a2ff13b7b1456ba08e17accb832704357b92ca;hb=b9a9d8d0471c28e80e350d6e49cde965f87b986b;hp=c43b7ed37e0581321e11bce57c3f74f4a5bb18ce;hpb=c4ac43749048c4c0e0ab3656d39384112a628742;p=ardour.git

diff --git a/libs/ardour/ardour/utils.h b/libs/ardour/ardour/utils.h
index c43b7ed37e..03a2ff13b7 100644
--- a/libs/ardour/ardour/utils.h
+++ b/libs/ardour/ardour/utils.h
@@ -28,18 +28,21 @@
 #include <string>
 #include <cmath>
 
-#if defined(HAVE_COREAUDIO) || defined(HAVE_AUDIOUNITS)
+#if __APPLE__
 #include <CoreFoundation/CoreFoundation.h>
-#endif
+#endif /* __APPLE__ */
+
+bool string_is_affirmative (const std::string&);
 
-#include "ardour.h"
+#include "ardour/ardour.h"
+#include "ardour/data_type.h"
+#include "ardour/dB.h"
 
 class XMLNode;
 
-Glib::ustring legalize_for_path (Glib::ustring str);
+std::string legalize_for_path (const std::string& str);
 XMLNode* find_named_node (const XMLNode& node, std::string name);
 std::string bool_as_string (bool);
-bool string_is_affirmative (const std::string&);
 
 static inline float f_max(float x, float a) {
 	x -= a;
@@ -50,24 +53,97 @@ static inline float f_max(float x, float a) {
 	return (x);
 }
 
-std::string bump_name_once(std::string s);
+std::string bump_name_once(const std::string& s, char delimiter);
 
 int cmp_nocase (const std::string& s, const std::string& s2);
 
-int touch_file(Glib::ustring path);
+int touch_file(std::string path);
 
-Glib::ustring path_expand (Glib::ustring);
-Glib::ustring region_name_from_path (Glib::ustring path, bool strip_channels, bool add_channel_suffix = false, uint32_t total = 0, uint32_t this_one = 0);
-bool path_is_paired (Glib::ustring path, Glib::ustring& pair_base);
+std::string path_expand (std::string);        /* single file path */
+std::string search_path_expand (std::string); /* colon-separated search path */
+std::string region_name_from_path (std::string path, bool strip_channels, bool add_channel_suffix = false, uint32_t total = 0, uint32_t this_one = 0);
+bool path_is_paired (std::string path, std::string& pair_base);
 
-void compute_equal_power_fades (ARDOUR::nframes_t nframes, float* in, float* out);
+void compute_equal_power_fades (ARDOUR::framecnt_t nframes, float* in, float* out);
 
-const char* slave_source_to_string (ARDOUR::SlaveSource src);
-ARDOUR::SlaveSource string_to_slave_source (std::string str);
+const char* sync_source_to_string (ARDOUR::SyncSource src, bool sh = false);
+ARDOUR::SyncSource string_to_sync_source (std::string str);
 
 const char* edit_mode_to_string (ARDOUR::EditMode);
 ARDOUR::EditMode string_to_edit_mode (std::string);
 
+#undef  OLD_GAIN_MATH
+#define OLD_GAIN_MATH
+
+static inline double
+gain_to_slider_position (ARDOUR::gain_t g)
+{
+	if (g == 0) return 0;
+
+#ifndef OLD_GAIN_MATH
+	/* Power Law With Exponential Cutoff 2D, fit to data from TC Spectra
+	   console (image of fader gradations
+
+	   y = C * x(-T) * exp(-x/K)
+
+	   C =  8.2857630370864188E-01
+	   T = -5.1526743785019269E-01
+	   K =  7.8990885960495589E+00
+
+	 */
+	
+	return 8.2857630370864188E-01 * pow(g,5.1526743785019269E-01) * exp (-g/7.8990885960495589E+00);
+#else
+	return pow((6.0*log(g)/log(2.0)+192.0)/198.0, 8.0);
+#endif
+}
+
+static inline ARDOUR::gain_t
+slider_position_to_gain (double pos)
+{
+	if (pos == 0.0) {
+		return 0.0;
+	}
+
+#ifndef OLD_GAIN_MATH
+	/* 5th order polynomial function fit to data from a TC Spectra console
+	   fader (image of fader gradations).
+	 
+	   y = a + bx1 + cx2 + dx3 + fx4 + gx5
+	   
+	   a = -1.1945480381045521E-02
+	   b =  1.5809476525537265E+00
+	   c = -1.5850710838966151E+01
+	   d =  6.1643128605961991E+01
+	   f = -8.5525246160607693E+01
+	   g =  4.1312725896188283E+01
+
+	*/
+
+	double p = pos;
+	double g = -1.1945480381045521E-02;
+
+	g +=  1.5809476525537265E+00 * pos;
+	pos *= p;
+	g += -1.5850710838966151E+01 * pos;
+	pos *= p;
+	g += 6.1643128605961991E+01 * pos;
+	pos *= p;
+	g += -8.5525246160607693E+01 * pos;
+	pos *= p;
+	g += 4.1312725896188283E+01 * pos;
+
+	return g;
+#else
+	/* 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);
+#endif
+}
+#undef OLD_GAIN_MATH
+
+double gain_to_slider_position_with_max (double g, double max_gain = 2.0);
+double slider_position_to_gain_with_max (double g, double max_gain = 2.0);
 
 /* I don't really like hard-coding these falloff rates here
  * Probably should use a map of some kind that could be configured
@@ -86,9 +162,14 @@ float meter_falloff_to_float (ARDOUR::MeterFalloff);
 ARDOUR::MeterFalloff meter_falloff_from_float (float);
 float meter_falloff_to_db_per_sec (float);
 
-#if defined(HAVE_COREAUDIO) || defined(HAVE_AUDIOUNITS)
+const char* native_header_format_extension (ARDOUR::HeaderFormat, const ARDOUR::DataType& type);
+bool matching_unsuffixed_filename_exists_in (const std::string& dir, const std::string& name);
+
+uint32_t how_many_dsp_threads ();
+
+#if __APPLE__
 std::string CFStringRefToStdString(CFStringRef stringRef);
-#endif // HAVE_COREAUDIO
+#endif // __APPLE__
 
 #endif /* __ardour_utils_h__ */