type_decoder: update and extend Decoder base class doc strings

Some doc strings have become outdated, update them. Some doc strings
were terse, extend them. Ideally protocol decoder authors would be able
to use the builtin documentation to answer questions on data types and
arguments order. This implementation isn't there yet, needs more work.

diff --git a/type_decoder.c b/type_decoder.c
index 67cdbb245a33be9502190093a06a5186b2d60460..d21e92d5d0df76501c0ceb7722e3089e3be7279d 100644 (file)
--- a/type_decoder.c
+++ b/type_decoder.c
@@ -397,7 +397,10 @@ static void release_meta(GVariant *gvar)
 }
 
 PyDoc_STRVAR(Decoder_put_doc,
-       "Accepts a dictionary with the following keys: startsample, endsample, data"
+       "Put an annotation for the specified span of samples.\n"
+       "\n"
+       "Arguments: start and end sample number, stream id, annotation data.\n"
+       "Annotation data's layout depends on the output stream type."
 );
 
 static PyObject *Decoder_put(PyObject *self, PyObject *args)
@@ -559,7 +562,7 @@ err:
 }
 
 PyDoc_STRVAR(Decoder_register_doc,
-       "Register a new output stream"
+       "Register a new output stream."
 );
 
 static PyObject *Decoder_register(PyObject *self,
@@ -961,7 +964,20 @@ static int set_skip_condition(struct srd_decoder_inst *di, uint64_t count)
 }
 
 PyDoc_STRVAR(Decoder_wait_doc,
-       "Wait for one or more conditions to occur"
+       "Wait for one or more conditions to occur.\n"
+       "\n"
+       "Returns the sample data at the next position where the condition\n"
+       "is seen. When the optional condition is missing or empty, the next\n"
+       "sample number is used. The condition can be a dictionary with one\n"
+       "condition's details, or a list of dictionaries specifying multiple\n"
+       "conditions of which at least one condition must be true. Dicts can\n"
+       "contain one or more key/value pairs, all of which must be true for\n"
+       "the dict's condition to be considered true. The key either is a\n"
+       "channel index or a keyword, the value is the operation's parameter.\n"
+       "\n"
+       "Supported parameters for channel number keys: 'h', 'l', 'r', 'f',\n"
+       "or 'e' for level or edge conditions. Other supported keywords:\n"
+       "'skip' to advance over the given number of samples.\n"
 );
 
 static PyObject *Decoder_wait(PyObject *self, PyObject *args)
@@ -1098,7 +1114,11 @@ err:
 }
 
 PyDoc_STRVAR(Decoder_has_channel_doc,
-       "Report whether a channel was supplied"
+       "Check whether input data is supplied for a given channel.\n"
+       "\n"
+       "Argument: A channel index.\n"
+       "Returns: A boolean, True if the channel is connected,\n"
+       "False if the channel is open (won't see any input data).\n"
 );
 
 /**