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-rw-r--r--gr-fec/python/fec/capillary_threaded_decoder.py5
1 files changed, 5 insertions, 0 deletions
diff --git a/gr-fec/python/fec/capillary_threaded_decoder.py b/gr-fec/python/fec/capillary_threaded_decoder.py
index c4990ab21e..9a00cde192 100644
--- a/gr-fec/python/fec/capillary_threaded_decoder.py
+++ b/gr-fec/python/fec/capillary_threaded_decoder.py
@@ -33,6 +33,11 @@ class capillary_threaded_decoder(gr.hier_block2):
self.decoder_list_0 = decoder_list_0
+ check = math.log10(len(self.decoder_list_0)) / math.log10(2.0)
+ if(abs(check - int(check)) > 0):
+ gr.log.info("fec.capillary_threaded_decoder: number of decoders must be a power of 2.")
+ raise AttributeError
+
self.deinterleaves_0 = []
for i in range(int(math.log(len(decoder_list_0), 2))):
for j in range(int(math.pow(2, i))):