diff options
Diffstat (limited to 'tran/congen.alg')
| -rw-r--r-- | tran/congen.alg | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/tran/congen.alg b/tran/congen.alg new file mode 100644 index 0000000..9ff02d2 --- /dev/null +++ b/tran/congen.alg @@ -0,0 +1,17 @@ +(CONGEN +(NAME "congen") +(ARGUMENTS ("sound_type" "sndin") ("double" "risetime") ("double" "falltime")) +(START (MIN sndin)) +(STATE ("double" "value" "0") + ("double" "rise_factor" "exp(log(0.5) / (sndin->sr * risetime))") + ("double" "fall_factor" "exp(log(0.5) / (sndin->sr * falltime))")) +(CONSTANT "fall_factor" "rise_factor") +(ALWAYS-SCALE sndin) +(TERMINATE (MIN sndin)) +(INNER-LOOP " sample_type current = sndin; + if (current > value) { + value = current - (current - value) * rise_factor; + } else { + value = current - (current - value) * fall_factor; + } + output = (sample_type) value;")) |