Lfo.cpp 1.1 KB

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  1. /*
  2. * lfo.cpp - defination of Lfo class.
  3. *
  4. * Copyright (c) 2014 David French <dave/dot/french3/at/googlemail/dot/com>
  5. *
  6. * This file is part of LMMS - https://lmms.io
  7. *
  8. * This program is free software; you can redistribute it and/or
  9. * modify it under the terms of the GNU General Public
  10. * License as published by the Free Software Foundation; either
  11. * version 2 of the License, or (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16. * General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public
  19. * License along with this program (see COPYING); if not, write to the
  20. * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21. * Boston, MA 02110-1301 USA.
  22. *
  23. */
  24. #include "Lfo.h"
  25. #include "lmms_math.h"
  26. Lfo::Lfo( int samplerate )
  27. {
  28. m_samplerate = samplerate;
  29. m_twoPiOverSr = F_2PI / samplerate;
  30. }
  31. float Lfo::tick()
  32. {
  33. float output = sinf( m_phase );
  34. m_phase += m_increment;
  35. return output;
  36. }