diff options
| -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 |