diff options
Diffstat (limited to 'include/extlib_util.h')
-rw-r--r-- | include/extlib_util.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/extlib_util.h b/include/extlib_util.h new file mode 100644 index 0000000..259d944 --- /dev/null +++ b/include/extlib_util.h @@ -0,0 +1,31 @@ +/* + * Prototypes for utility functions used in pd externals + * Copyright (c) 2000-2003 by Tom Schouten + * + * 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. + */ + +#include <math.h> +#include "m_pd.h" + +/* envelope stuff */ + +/* exponential range for envelopes is 60dB */ +#define ENVELOPE_RANGE 0.001f +#define ENVELOPE_MAX (1.0f - ENVELOPE_RANGE) +#define ENVELOPE_MIN ENVELOPE_RANGE + +/* convert milliseconds to 1-p, with p a real pole */ +float milliseconds_2_one_minus_realpole(float time); |