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Diffstat (limited to 'libs/ardour/ardour/noise.h')
-rw-r--r-- | libs/ardour/ardour/noise.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libs/ardour/ardour/noise.h b/libs/ardour/ardour/noise.h new file mode 100644 index 0000000000..f775fcce36 --- /dev/null +++ b/libs/ardour/ardour/noise.h @@ -0,0 +1,38 @@ +/* + Copyright (C) 2000-2007 Paul Davis + + 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., 675 Mass Ave, Cambridge, MA 02139, USA. + +*/ + +#ifndef NOISE_H +#define NOISE_H + +/* Can be overrriden with any code that produces whitenoise between 0.0f and + * 1.0f, eg (random() / (float)RAND_MAX) should be a good source of noise, but + * its expensive */ +#ifndef GDITHER_NOISE +#define GDITHER_NOISE gdither_noise() +#endif + +inline static float gdither_noise() +{ + static uint32_t rnd = 23232323; + rnd = (rnd * 196314165) + 907633515; + + return rnd * 2.3283064365387e-10f; +} + +#endif |