Python 0.9.1 as posted in alt.sources

1 files changed, 47 insertions, 0 deletions

diff --git a/lib/VUMeter.py b/lib/VUMeter.py
new file mode 100644
index 0000000..c862452
--- /dev/null
+++ b/lib/VUMeter.py
@@ -0,0 +1,47 @@
+# Module 'VUMeter'
+
+import audio
+from StripChart import StripChart
+
+K = 1024
+Rates = [0, 32*K, 16*K, 8*K]
+
+class VUMeter() = StripChart():
+ #
+ # Override define() and timer() methods
+ #
+ def define(self, parent):
+ self = StripChart.define(self, (parent, 128))
+ self.parent.need_timer(self)
+ self.sampling = 0
+ self.rate = 3
+ self.enable(0)
+ return self
+ #
+ def timer(self):
+ if self.sampling:
+ chunk = audio.wait_recording()
+ self.sampling = 0
+ nums = audio.chr2num(chunk)
+ ampl = max(abs(min(nums)), abs(max(nums)))
+ self.append(ampl)
+ if self.enabled and not self.sampling:
+ audio.setrate(self.rate)
+ size = Rates[self.rate]/10
+ size = size/48*48
+ audio.start_recording(size)
+ self.sampling = 1
+ if self.sampling:
+ self.parent.settimer(1)
+ #
+ # New methods: start() and stop()
+ #
+ def stop(self):
+ if self.sampling:
+ chunk = audio.stop_recording()
+ self.sampling = 0
+ self.enable(0)
+ #
+ def start(self):
+ self.enable(1)
+ self.timer()