178 lines
5.0 KiB
C++
178 lines
5.0 KiB
C++
/*
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Copyright (C) 1999 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __ardour_utils_h__
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#define __ardour_utils_h__
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#ifdef WAF_BUILD
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#include "libardour-config.h"
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#endif
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#include <iostream>
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#include <string>
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#include <cmath>
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#if __APPLE__
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#include <CoreFoundation/CoreFoundation.h>
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#endif /* __APPLE__ */
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#include "ardour/ardour.h"
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#include "ardour/data_type.h"
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#include "ardour/dB.h"
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class XMLNode;
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std::string legalize_for_path (const std::string& str);
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std::string legalize_for_universal_path (const std::string& str);
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std::string legalize_for_uri (const std::string& str);
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std::string legalize_for_path_2X (const std::string& str);
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XMLNode* find_named_node (const XMLNode& node, std::string name);
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std::string bool_as_string (bool);
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static inline float f_max(float x, float a) {
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x -= a;
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x += fabsf (x);
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x *= 0.5f;
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x += a;
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return (x);
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}
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std::string bump_name_once(const std::string& s, char delimiter);
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int cmp_nocase (const std::string& s, const std::string& s2);
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int cmp_nocase_utf8 (const std::string& s1, const std::string& s2);
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int touch_file(std::string path);
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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);
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bool path_is_paired (std::string path, std::string& pair_base);
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void compute_equal_power_fades (ARDOUR::framecnt_t nframes, float* in, float* out);
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const char* sync_source_to_string (ARDOUR::SyncSource src, bool sh = false);
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ARDOUR::SyncSource string_to_sync_source (std::string str);
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const char* edit_mode_to_string (ARDOUR::EditMode);
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ARDOUR::EditMode string_to_edit_mode (std::string);
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#undef OLD_GAIN_MATH
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#define OLD_GAIN_MATH
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static inline double
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gain_to_slider_position (ARDOUR::gain_t g)
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{
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if (g == 0) return 0;
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#ifndef OLD_GAIN_MATH
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/* Power Law With Exponential Cutoff 2D, fit to data from TC Spectra
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console (image of fader gradations
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y = C * x(-T) * exp(-x/K)
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C = 8.2857630370864188E-01
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T = -5.1526743785019269E-01
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K = 7.8990885960495589E+00
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*/
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return 8.2857630370864188E-01 * pow(g,5.1526743785019269E-01) * exp (-g/7.8990885960495589E+00);
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#else
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return pow((6.0*log(g)/log(2.0)+192.0)/198.0, 8.0);
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#endif
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}
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static inline ARDOUR::gain_t
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slider_position_to_gain (double pos)
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{
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if (pos == 0.0) {
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return 0.0;
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}
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#ifndef OLD_GAIN_MATH
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/* 5th order polynomial function fit to data from a TC Spectra console
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fader (image of fader gradations).
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y = a + bx1 + cx2 + dx3 + fx4 + gx5
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a = -1.1945480381045521E-02
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b = 1.5809476525537265E+00
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c = -1.5850710838966151E+01
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d = 6.1643128605961991E+01
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f = -8.5525246160607693E+01
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g = 4.1312725896188283E+01
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*/
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double p = pos;
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double g = -1.1945480381045521E-02;
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g += 1.5809476525537265E+00 * pos;
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pos *= p;
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g += -1.5850710838966151E+01 * pos;
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pos *= p;
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g += 6.1643128605961991E+01 * pos;
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pos *= p;
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g += -8.5525246160607693E+01 * pos;
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pos *= p;
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g += 4.1312725896188283E+01 * pos;
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return g;
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#else
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/* XXX Marcus writes: this doesn't seem right to me. but i don't have a better answer ... */
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if (pos == 0.0) return 0;
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return pow (2.0,(sqrt(sqrt(sqrt(pos)))*198.0-192.0)/6.0);
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#endif
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}
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#undef OLD_GAIN_MATH
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double gain_to_slider_position_with_max (double g, double max_gain = 2.0);
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double slider_position_to_gain_with_max (double g, double max_gain = 2.0);
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/* I don't really like hard-coding these falloff rates here
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* Probably should use a map of some kind that could be configured
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* These rates are db/sec.
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*/
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#define METER_FALLOFF_OFF 0.0f
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#define METER_FALLOFF_SLOWEST 6.6f // BBC standard
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#define METER_FALLOFF_SLOW 8.6f // BBC standard, EBU 24dB / 2.8sec
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#define METER_FALLOFF_SLOWISH 12.0f // DIN 20dB / 1.7 sec
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#define METER_FALLOFF_MODERATE 13.3f // EBU-PPM, IRT PPM- 20dB / 1.5 sec
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#define METER_FALLOFF_MEDIUM 20.0f
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#define METER_FALLOFF_FAST 32.0f
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#define METER_FALLOFF_FASTER 46.0f
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#define METER_FALLOFF_FASTEST 70.0f
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float meter_falloff_to_float (ARDOUR::MeterFalloff);
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ARDOUR::MeterFalloff meter_falloff_from_float (float);
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float meter_falloff_to_db_per_sec (float);
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const char* native_header_format_extension (ARDOUR::HeaderFormat, const ARDOUR::DataType& type);
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bool matching_unsuffixed_filename_exists_in (const std::string& dir, const std::string& name);
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uint32_t how_many_dsp_threads ();
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#if __APPLE__
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std::string CFStringRefToStdString(CFStringRef stringRef);
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#endif // __APPLE__
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#endif /* __ardour_utils_h__ */
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