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| author | Robin Haberkorn <robin.haberkorn@googlemail.com> | 2015-04-20 14:46:48 +0200 |
|---|---|---|
| committer | Robin Haberkorn <robin.haberkorn@googlemail.com> | 2015-04-20 14:46:48 +0200 |
| commit | cb29ed5d19e37cb94c02eabf6e6110ac0649e565 (patch) | |
| tree | 44b3ea9ef93c21f59a309a377e62c64308c7db50 /applause.lua | |
| parent | 0c10486f3023e911f7fb8b400d61143cfcd009bd (diff) | |
| download | applause2-cb29ed5d19e37cb94c02eabf6e6110ac0649e565.tar.gz | |
filtering: handle frequency streams short than the input stream
Diffstat (limited to 'applause.lua')
| -rw-r--r-- | applause.lua | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/applause.lua b/applause.lua index 2e7ec5c..8abdd1a 100644 --- a/applause.lua +++ b/applause.lua @@ -742,7 +742,10 @@ function LPFStream:tick() -- calculate filter coefficients -- avoid recalculation for constant frequencies local freq = freq_tick() - if freq ~= cur_freq then + if freq == nil then + -- don't filter if we run out of frequency samples + return tick() + elseif freq ~= cur_freq then cur_freq = freq local pfreq = cur_freq * radians_per_sample * 0.5 @@ -796,7 +799,10 @@ function HPFStream:tick() -- calculate filter coefficients -- avoid recalculation for constant frequencies local freq = freq_tick() - if freq ~= cur_freq then + if freq == nil then + -- don't filter if we run out of frequency samples + return tick() + elseif freq ~= cur_freq then cur_freq = freq local pfreq = cur_freq * radians_per_sample * 0.5 @@ -851,7 +857,10 @@ function BPFStream:tick() -- calculate filter coefficients -- avoid recalculation for constant frequencies local freq = freq_tick() - if freq ~= cur_freq then + if freq == nil then + -- don't filter if we run out of frequency samples + return tick() + elseif freq ~= cur_freq then cur_freq = freq local pfreq = cur_freq * radians_per_sample @@ -907,7 +916,10 @@ function BRFStream:tick() -- calculate filter coefficients -- avoid recalculation for constant frequencies local freq = freq_tick() - if freq ~= cur_freq then + if freq == nil then + -- don't filter if we run out of frequency samples + return tick() + elseif freq ~= cur_freq then cur_freq = freq local pfreq = cur_freq * radians_per_sample |