srd: Pass metadata to decoders only on SR_DF_HEADER.

Before this was passed to the decoder's constuctor, but the parameters
may not all be known at construction.  Decoders now have a method start()
which is called at the start of the capture, and metadata is passed as
an arg to this function.

1 files changed, 5 insertions, 5 deletions

diff --git a/decoders/i2c.py b/decoders/i2c.py
index a46ba6a..f0b32e7 100644
--- a/decoders/i2c.py
+++ b/decoders/i2c.py
@@ -154,11 +154,7 @@ class Decoder():
         'address-space': ['Address space (in bits)', 7],
     }
 
-    def __init__(self, unitsize, **kwargs):
-        # Metadata comes in here, we don't care for now.
-        # print kwargs
-        self.unitsize = unitsize
-
+    def __init__(self, **kwargs):
         self.probes = Decoder.probes.copy()
 
         # TODO: Don't hardcode the number of channels.
@@ -180,6 +176,10 @@ class Decoder():
         self.oldscl = None
         self.oldsda = None
 
+    def start(self, metadata):
+        self.unitsize = metadata["unitsize"]
+
+
     def report(self):
         pass