Add a CFP decoder.

[libsigrokdecode.git] / decoders / i2s / pd.py

diff --git a/decoders/i2s/pd.py b/decoders/i2s/pd.py
index beee07925ce57c6018cecc59b215071c7ee6ba2e..bfb2c9e9f71b3952551d46499a957b7066c663ff 100644 (file)
--- a/decoders/i2s/pd.py
+++ b/decoders/i2s/pd.py
@@ -33,9 +33,6 @@ Packet:
 <value>: integer
 '''
 
-class SamplerateError(Exception):
-    pass
-
 class Decoder(srd.Decoder):
     api_version = 3
     id = 'i2s'
@@ -60,6 +57,9 @@ class Decoder(srd.Decoder):
     )
 
     def __init__(self):
+        self.reset()
+
+    def reset(self):
         self.samplerate = None
         self.oldws = 1
         self.bitcount = 0
@@ -89,12 +89,12 @@ class Decoder(srd.Decoder):
         self.put(self.ss_block, self.samplenum, self.out_ann, data)
 
     def report(self):
-
         # Calculate the sample rate.
         samplerate = '?'
         if self.ss_block is not None and \
             self.first_sample is not None and \
-            self.ss_block > self.first_sample:
+            self.ss_block > self.first_sample and \
+            self.samplerate:
             samplerate = '%d' % (self.samplesreceived *
                 self.samplerate / (self.ss_block -
                 self.first_sample))
@@ -125,8 +125,6 @@ class Decoder(srd.Decoder):
         return struct.pack('<I', self.data)
 
     def decode(self):
-        if not self.samplerate:
-            raise SamplerateError('Cannot decode without samplerate.')
         while True:
             # Wait for a rising edge on the SCK pin.
             sck, ws, sd = self.wait({0: 'r'})