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author | Michele Calgaro <michele.calgaro@yahoo.it> | 2020-12-08 22:26:17 +0900 |
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committer | Michele Calgaro <michele.calgaro@yahoo.it> | 2020-12-08 22:49:18 +0900 |
commit | 2fe8b1b92fa2a9b93fea0ed0cb62802237b82e8d (patch) | |
tree | 50b6e05734cd5c0f642eeac4e841539db25f113b /arts/modules/synth/synth_pitch_shift_impl.cc | |
parent | 6f9d8ae25c3ff607e0e07315884c967dd0bca901 (diff) | |
download | tdemultimedia-2fe8b1b92fa2a9b93fea0ed0cb62802237b82e8d.tar.gz tdemultimedia-2fe8b1b92fa2a9b93fea0ed0cb62802237b82e8d.zip |
Renaming of files in preparation for code style tools.
Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit fce86b22a2367f1be1f9aae5e1ba3d18d1371b74)
Diffstat (limited to 'arts/modules/synth/synth_pitch_shift_impl.cc')
-rw-r--r-- | arts/modules/synth/synth_pitch_shift_impl.cc | 196 |
1 files changed, 0 insertions, 196 deletions
diff --git a/arts/modules/synth/synth_pitch_shift_impl.cc b/arts/modules/synth/synth_pitch_shift_impl.cc deleted file mode 100644 index 37217c8a..00000000 --- a/arts/modules/synth/synth_pitch_shift_impl.cc +++ /dev/null @@ -1,196 +0,0 @@ -/* - - Copyright (C) 2000 Jeff Tranter - tranter@pobox.com - - (C) 1999 Stefan Westerfeld - stefan@space.twc.de - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - - */ - -#include <math.h> -#include "artsmodulessynth.h" -#include "stdsynthmodule.h" - -using namespace Arts; - -class Synth_PITCH_SHIFT_impl : virtual public Synth_PITCH_SHIFT_skel, - virtual public StdSynthModule -{ -protected: - float _speed, _frequency; - - enum { MAXDELAY = 44100 }; - float *dbuffer; - float lfopos, b1pos, b2pos, b1inc, b2inc; - bool b1reset, b2reset, initialized; - int dbpos; - -public: - Synth_PITCH_SHIFT_impl() : _speed(1.0), _frequency(5.0) - { - } - - float speed() { return _speed; } - void speed(float newSpeed) { _speed = newSpeed; } - - float frequency() { return _frequency; } - void frequency(float newFrequency) { _frequency = newFrequency; } - - - void streamInit() - { - dbuffer = new float[MAXDELAY]; - for (dbpos=0; dbpos<MAXDELAY; dbpos++) - dbuffer[dbpos] = 0; - - dbpos = 0; - initialized = false; - lfopos = 0; - } - void streamEnd() - { - delete[] dbuffer; - } - - void calculateBlock(unsigned long samples) - { - float *outend = outvalue + samples; - float fsr = (float)samplingRate; - float pi2 = 2*M_PI; - float lfo, b1value, b2value; - float lfoposinc = _frequency / fsr; - - if (!initialized) - { - if (_speed <= 1.0) { - b1pos = b2pos = 0.0; - b1inc = b2inc = 1.0 - _speed; - } else { - /* not yet sure what would be a nice initialization here? */ - b1pos = b2pos = 0.0; - b1inc = b2inc = 0.0; - } - initialized = true; - } - - while (outvalue < outend) - { - /* - * fill delay buffer with the input signal - */ - dbuffer[dbpos] = *invalue++; - - lfopos += lfoposinc; - lfopos -= floor(lfopos); - - if (lfopos < 0.25) { - b1reset = b2reset = false; - } - - /* - * _speed < 1.0 (downpitching) - * - * start with current sample and increase delay slowly - * - * _speed > 1.0 (uppitching) - * - * start with a sample from long ago and slowly decrease delay - */ - if (!b1reset && lfopos > 0.25) { - if (_speed <= 1.0) { - b1pos = 0; - b1inc = 1 - _speed; - } else { - b1inc = 1 - _speed; - b1pos = 10 + ((-b1inc) * (1 / lfoposinc)); - /* 10+ are not strictly necessary */ - } - b1reset = true; - } - - if (!b2reset && lfopos > 0.75) { - if (_speed <= 1.0) { - b2pos = 0; - b2inc = 1 - _speed; - } else{ - b2inc = 1 - _speed; - b2pos = 10 + ((-b2inc) * (1/lfoposinc)); - /* 10+ are not strictly necessary */ - } - b2reset = true; - } - - b1pos += b1inc; - b2pos += b2inc; - - int position, position1; - double error,int_pos; - - /* - * Interpolate value from buffer position 1 - */ - error = modf(b1pos, &int_pos); - - position = dbpos - (int)int_pos; - if (position < 0) - position += MAXDELAY; - position1 = position - 1; - if (position1 < 0) - position1 += MAXDELAY; - - b1value = dbuffer[position] * (1 - error) + dbuffer[position1] * error; - - /* - * Interpolate value from buffer position 2 - */ - error = modf(b2pos,&int_pos); - - position = dbpos - (int)int_pos; - if (position < 0) - position += MAXDELAY; - position1 = position-1; - if ( position1 < 0) - position1 += MAXDELAY; - - b2value = dbuffer[position]*(1-error) + dbuffer[position1]*error; - - /* - * Calculate output signal from these two buffers - */ - - lfo = (sin(pi2 * lfopos) + 1) / 2; - - /* position sin lfo variable - *------------------------------------------------------------------ - * lfo value: 0.25 1 1 => buffer 2 is used - * 0.75 -1 0 => buffer 1 is used - */ - - *outvalue++ = b1value * (1.0 - lfo) + b2value * lfo; - - /* - * increment delay buffer position - */ - dbpos++; - if (dbpos == MAXDELAY) - dbpos = 0; - } - } -}; - -REGISTER_IMPLEMENTATION(Synth_PITCH_SHIFT_impl); |