2 Copyright (C) 1999 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #ifndef __ardour_utils_h__
21 #define __ardour_utils_h__
24 #include "libardour-config.h"
32 #include <CoreFoundation/CoreFoundation.h>
33 #endif /* __APPLE__ */
35 #include "ardour/libardour_visibility.h"
36 #include "ardour/ardour.h"
37 #include "ardour/data_type.h"
38 #include "ardour/dB.h"
42 LIBARDOUR_API std::string legalize_for_path (const std::string& str);
43 LIBARDOUR_API std::string legalize_for_universal_path (const std::string& str);
44 LIBARDOUR_API std::string legalize_for_uri (const std::string& str);
45 LIBARDOUR_API std::string legalize_for_path_2X (const std::string& str);
46 LIBARDOUR_API XMLNode* find_named_node (const XMLNode& node, std::string name);
47 LIBARDOUR_API std::string bool_as_string (bool);
49 static inline float f_max(float x, float a) {
58 LIBARDOUR_API std::string bump_name_once(const std::string& s, char delimiter);
60 LIBARDOUR_API int cmp_nocase (const std::string& s, const std::string& s2);
61 LIBARDOUR_API int cmp_nocase_utf8 (const std::string& s1, const std::string& s2);
63 LIBARDOUR_API int touch_file(std::string path);
65 LIBARDOUR_API 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);
66 LIBARDOUR_API bool path_is_paired (std::string path, std::string& pair_base);
68 LIBARDOUR_API void compute_equal_power_fades (ARDOUR::framecnt_t nframes, float* in, float* out);
70 LIBARDOUR_API const char* sync_source_to_string (ARDOUR::SyncSource src, bool sh = false);
71 LIBARDOUR_API ARDOUR::SyncSource string_to_sync_source (std::string str);
73 LIBARDOUR_API const char* edit_mode_to_string (ARDOUR::EditMode);
74 LIBARDOUR_API ARDOUR::EditMode string_to_edit_mode (std::string);
80 gain_to_slider_position (ARDOUR::gain_t g)
85 /* Power Law With Exponential Cutoff 2D, fit to data from TC Spectra
86 console (image of fader gradations
88 y = C * x(-T) * exp(-x/K)
90 C = 8.2857630370864188E-01
91 T = -5.1526743785019269E-01
92 K = 7.8990885960495589E+00
96 return 8.2857630370864188E-01 * pow(g,5.1526743785019269E-01) * exp (-g/7.8990885960495589E+00);
98 return pow((6.0*log(g)/log(2.0)+192.0)/198.0, 8.0);
102 static inline ARDOUR::gain_t
103 slider_position_to_gain (double pos)
109 #ifndef OLD_GAIN_MATH
110 /* 5th order polynomial function fit to data from a TC Spectra console
111 fader (image of fader gradations).
113 y = a + bx1 + cx2 + dx3 + fx4 + gx5
115 a = -1.1945480381045521E-02
116 b = 1.5809476525537265E+00
117 c = -1.5850710838966151E+01
118 d = 6.1643128605961991E+01
119 f = -8.5525246160607693E+01
120 g = 4.1312725896188283E+01
125 double g = -1.1945480381045521E-02;
127 g += 1.5809476525537265E+00 * pos;
129 g += -1.5850710838966151E+01 * pos;
131 g += 6.1643128605961991E+01 * pos;
133 g += -8.5525246160607693E+01 * pos;
135 g += 4.1312725896188283E+01 * pos;
139 /* XXX Marcus writes: this doesn't seem right to me. but i don't have a better answer ... */
140 if (pos == 0.0) return 0;
141 return pow (2.0,(sqrt(sqrt(sqrt(pos)))*198.0-192.0)/6.0);
146 LIBARDOUR_API double gain_to_slider_position_with_max (double g, double max_gain = 2.0);
147 LIBARDOUR_API double slider_position_to_gain_with_max (double g, double max_gain = 2.0);
149 /* I don't really like hard-coding these falloff rates here
150 * Probably should use a map of some kind that could be configured
151 * These rates are db/sec.
154 #define METER_FALLOFF_OFF 0.0f
155 #define METER_FALLOFF_SLOWEST 6.6f // BBC standard
156 #define METER_FALLOFF_SLOW 8.6f // BBC standard, EBU 24dB / 2.8sec
157 #define METER_FALLOFF_SLOWISH 12.0f // DIN 20dB / 1.7 sec
158 #define METER_FALLOFF_MODERATE 13.3f // EBU-PPM, IRT PPM- 20dB / 1.5 sec
159 #define METER_FALLOFF_MEDIUM 20.0f
160 #define METER_FALLOFF_FAST 32.0f
161 #define METER_FALLOFF_FASTER 46.0f
162 #define METER_FALLOFF_FASTEST 70.0f
164 LIBARDOUR_API float meter_falloff_to_float (ARDOUR::MeterFalloff);
165 LIBARDOUR_API ARDOUR::MeterFalloff meter_falloff_from_float (float);
166 LIBARDOUR_API float meter_falloff_to_db_per_sec (float);
168 LIBARDOUR_API const char* native_header_format_extension (ARDOUR::HeaderFormat, const ARDOUR::DataType& type);
169 LIBARDOUR_API bool matching_unsuffixed_filename_exists_in (const std::string& dir, const std::string& name);
171 LIBARDOUR_API uint32_t how_many_dsp_threads ();
174 LIBARDOUR_API std::string CFStringRefToStdString(CFStringRef stringRef);
177 #endif /* __ardour_utils_h__ */