outbuf = ''
+ # FIXME: Get the data in the correct format in the first place.
+ inbuf = [ord(x) for x in inbuf]
+
# TODO: Don't hardcode the number of channels.
channels = 8
# print type(inbuf)
# Presets...
- s = ord(inbuf[0])
- for i in xrange(channels):
- curbit = (s & (1 << i) != 0)
- oldbit[i] = curbit
+ oldbyte = inbuf[0]
+ for i in range(channels):
+ oldbit[i] = (oldbyte & (1 << i)) >> i
# Loop over all samples.
# TODO: Handle LAs with more/less than 8 channels.
for s in inbuf:
- s = ord(s) # FIXME
- for i in xrange(channels):
- curbit = (s & (1 << i) != 0)
- if (oldbit[i] == 0 and curbit == 1):
+ # Optimization: Skip identical bytes (no transitions).
+ if oldbyte == s:
+ continue
+ for i in range(channels):
+ curbit = (s & (1 << i)) >> i
+ # Optimization: Skip identical bits (no transitions).
+ if oldbit[i] == curbit:
+ continue
+ elif (oldbit[i] == 0 and curbit == 1):
rising[i] += 1
elif (oldbit[i] == 1 and curbit == 0):
falling[i] += 1
oldbit[i] = curbit
# Total number of transitions is the sum of rising and falling edges.
- for i in xrange(channels):
+ for i in range(channels):
transitions[i] = rising[i] + falling[i]
outbuf += "Rising edges: "
- for i in xrange(channels):
+ for i in range(channels):
outbuf += str(rising[i]) + " "
outbuf += "\nFalling edges: "
- for i in xrange(channels):
+ for i in range(channels):
outbuf += str(falling[i]) + " "
outbuf += "\nTransitions: "
- for i in xrange(channels):
+ for i in range(channels):
outbuf += str(transitions[i]) + " "
outbuf += "\n"
return outbuf
+# Use psyco (if available) as it results in huge performance improvements.
+try:
+ import psyco
+ psyco.bind(sigrokdecode_count_transitions)
+except ImportError:
+ pass
+