Some implementation of the ChannelMap class

pycmx/parse_cmx.py

@@ -1,13 +1,5 @@
-#!/usr/bin/env python
-# coding: utf-8
-
-# # CMX3600 EDL Parsing
-# 
-# ## String Helper
-# 
-# We start with a `colliate` function, which will help us divide a string into fixed-width columns.
-
-# EDLs
+# pycmx
+# (c) 2018 Jamie Hardt
 
 from .parse_cmx_statements import parse_cmx3600_statements
 from collections import namedtuple
@@ -42,43 +34,45 @@ class NamedTupleParser:
 
 
 class CmxChannelMap:
-    def __init__(self, cmx_string):
-        self.v = False
-        self.a1 = False
-        self.a2 = False
-        self.a3 = False
-        self.a4 = False
-        if cmx_string == "V":
-            self.v = True
-        elif cmx_string == "A":
-            self.a1 = True
-        elif cmx_string == "A2":
-            self.a2 = True
-        elif cmx_string == "AA":
-            self.a1 = True
-            self.a2 = True
-        elif cmx_string == "B":
-            self.v = True
-            self.a1 = True
-        elif cmx_string == "V/AA":
-            self.v = True
-            self.a1 = True
-            self.a2 = True
-        elif cmx_string == "V/A2":
-            self.v = True
-            self.a2 = True
+
+    chan_map = {     "V" :    (True,   False,   False),
+                "A" :    (False,  True,    False),
+                "A2" :   (False,  False,   True),
+                "AA" :   (False,  True,    True),
+                "B" :    (True,   True,    False),
+                "V/AA" : (True,   True,    True),
+                "V/A2" : (True,   False,   True)
+        }
+
+
+    def __init__(self, v=False, a1=False, a2=False, a3=False, a4=False):
+        self.v = v
+        self.a1 = a1
+        self.a2 = a2
+        self.a3 = a3
+        self.a4 = a4
+
+
+    def appendEvent(self, event_str):
+        if event_str in self.chan_map:
+            channels = self.chan_map[event_str]
+            self.v = channels[0]
+            self.a1 = channels[1]
+            self.a2 = channels[2]
+
 
     def appendExt(self, audio_ext):
         self.a3 = ext.audio3
         self.a4 = ext.audio4
 
+    def __repr__(self):
+        return "CmxChannelMap(v="+ self.v.__repr__( ) + \
+                ",a1=" + self.a1.__repr__() + \
+                ",a2=" + self.a2.__repr__() + \
+                ",a3=" + self.a3.__repr__() + \
+                ",a4=" + self.a4.__repr__() +")"
         
             
-Cmx3600Event = namedtuple("Cmx3600Event",['title','number','clip_name', 'source_name','channels',
-                                          'source_start','source_finish',
-                                          'record_start','record_finish',
-                                          'fcm_drop'])
-    
 def parse_cmx3600(file):
     """Accepts the path to a CMX EDL and returns a list of all events contained therein."""
     statements = parse_cmx3600_statements(file)
@@ -88,7 +82,6 @@ def parse_cmx3600(file):
     return event_list(title, parser)
     
 def event_list(title, parser):
-    print("Parsing event list")
     state = {"fcm_drop" : False}
 
     events_result = []
@@ -102,9 +95,12 @@ def event_list(title, parser):
                 events_result.append(this_event)
 
             raw_event = parser.current_token
+            channels = CmxChannelMap()
+            channels.appendEvent(raw_event.channels)
+
             this_event = {'title': title, 'number': raw_event.event, 'clip_name': None ,
                                             'source_name': raw_event.source, 
-                                            'channels': CmxChannelMap(raw_event.channels),
+                                            'channels': channels,
                                             'source_start': raw_event.source_in,
                                             'source_finish': raw_event.source_out,
                                             'record_start': raw_event.record_in,
@@ -116,8 +112,9 @@ def event_list(title, parser):
             this_event['clip_name'] = parser.current_token.name
         elif parser.accept('SourceFile'):
             this_event['source_name'] = parser.current_token.filename
+        elif parser.accept('Trailer'):
+            break
         else:
-            events_result.append(parser.current_token)
             parser.next_token()
     
     if this_event != None:

pycmx/parse_cmx_statements.py

@@ -16,6 +16,7 @@ StmtAudioExt = namedtuple("AudioExt",["audio3","audio4"])
 StmtClipName = namedtuple("ClipName",["name"])
 StmtSourceFile = namedtuple("SourceFile",["filename"])
 StmtRemark = namedtuple("Remark",["text"])
+StmtTrailer = namedtuple("Trailer",["text"])
 StmtUnrecognized = namedtuple("Unrecognized",["content"])
 
 
@@ -55,6 +56,8 @@ def parse_cmx3600_line(line):
             return parse_extended_audio_channels(line)
         elif line.startswith("*"):
             return parse_remark( line[1:].strip())
+        elif line.startswith(">>>"):
+            return parse_trailer_statement(line)
         else:
             return parse_unrecognized(line)
 
@@ -117,3 +120,7 @@ def parse_columns_for_standard_form(line, event_field_length, source_field_lengt
                      record_out=column_strings[16].strip())
 
 
+def parse_trailer_statement(line):
+    trimmed = line[3:].strip()
+    return StmtTrailer(trimmed)
+