i2s: Fix unportable use of struct.pack

Using the format string 'I' with the default (implied) prefix '@'
results in both word size and endianness being platform dependent.
In this case standard size (32 bits) and little endianness is
required, so the prefix '<' needs to be used.

diff --git a/decoders/i2s/pd.py b/decoders/i2s/pd.py
index 05907976442808cca8118a1b8ee8fc506cd08b7c..beee07925ce57c6018cecc59b215071c7ee6ba2e 100644 (file)
--- a/decoders/i2s/pd.py
+++ b/decoders/i2s/pd.py
@@ -122,7 +122,7 @@ class Decoder(srd.Decoder):
         return h
 
     def wav_sample(self, sample):
-        return struct.pack('I', self.data)
+        return struct.pack('<I', self.data)
 
     def decode(self):
         if not self.samplerate: