Another test file, more jupyter experiments

examples/wavinfo.ipynb

@@ -148,6 +148,58 @@
     "print(ptinfo.bext)"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 17,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'<BWFXML><IXML_VERSION>1.61</IXML_VERSION><STEINBERG><ATTR_LIST><ATTR><TYPE>string</TYPE><NAME>MediaLibrary</NAME><VALUE>The Recordist Christmas 2018</VALUE></ATTR><ATTR><TYPE>string</TYPE><NAME>MediaCategoryPost</NAME><VALUE>Bullets</VALUE></ATTR><ATTR><TYPE>string</TYPE><NAME>MediaLibraryManufacturerName</NAME><VALUE>Creative Sound Design, LLC</VALUE></ATTR><ATTR><TYPE>string</TYPE><NAME>AudioSoundEditor</NAME><VALUE>Frank Bry</VALUE></ATTR><ATTR><TYPE>string</TYPE><NAME>MediaComment</NAME><VALUE>BULLET Impact Plastic LCD TV Screen Shatter Debris 2x</VALUE></ATTR><ATTR><TYPE>string</TYPE><NAME>MusicalCategory</NAME><VALUE>Bullets</VALUE></ATTR></ATTR_LIST></STEINBERG></BWFXML>'"
+      ]
+     },
+     "execution_count": 17,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "library_sound = testfile_path + 'BULLET Impact Plastic LCD TV Screen Shatter Debris 2x.wav'\n",
+    "\n",
+    "recinfo = wavinfo.WavInfoReader(library_sound)\n",
+    "\n",
+    "recinfo.ixml.source"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "[   ChunkDescriptor(ident=b'fmt ', start=20, length=40),\n",
+      "    ChunkDescriptor(ident=b'bext', start=68, length=604),\n",
+      "    ChunkDescriptor(ident=b'data', start=680, length=2833404),\n",
+      "    ChunkDescriptor(ident=b'ID3 ', start=2834092, length=2048),\n",
+      "    ChunkDescriptor(ident=b'SMED', start=2836148, length=5468),\n",
+      "    ListChunkDescriptor(signature=b'INFO', children=[ChunkDescriptor(ident=b'IPRD', start=2841636, length=30), ChunkDescriptor(ident=b'IGNR', start=2841674, length=8), ChunkDescriptor(ident=b'IART', start=2841690, length=10), ChunkDescriptor(ident=b'ICMT', start=2841708, length=54), ChunkDescriptor(ident=b'ICOP', start=2841770, length=84), ChunkDescriptor(ident=b'ISFT', start=2841862, length=12), ChunkDescriptor(ident=b'ICRD', start=2841882, length=12)]),\n",
+      "    ChunkDescriptor(ident=b'iXML', start=2841902, length=686),\n",
+      "    ChunkDescriptor(ident=b'umid', start=2842596, length=24),\n",
+      "    ChunkDescriptor(ident=b'_PMX', start=2842628, length=3560)]\n"
+     ]
+    }
+   ],
+   "source": [
+    "with open(library_sound,'rb') as f:\n",
+    "    chunk_tree = wavinfo.wave_parser.parse_chunk(f)\n",
+    "\n",
+    "pp.pprint(chunk_tree.children)"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,

wavinfo/wave_parser.py

@@ -3,9 +3,9 @@ import struct
 
 from collections import namedtuple
 
-ListChunkDescriptor = namedtuple('ListChunk' , 'signature children')
+ListChunkDescriptor = namedtuple('ListChunkDescriptor' , 'signature children')
 
-class ChunkDescriptor(namedtuple('Chunk', 'ident start length') ):
+class ChunkDescriptor(namedtuple('ChunkDescriptor', 'ident start length') ):
     def read_data(self, from_stream):
         from_stream.seek(self.start)
         return from_stream.read(self.length)

wavinfo/wave_reader.py

@@ -2,7 +2,7 @@ import struct
 
 from collections import namedtuple
 
-from .wave_parser import parse_chunk
+from .wave_parser import parse_chunk, ChunkDescriptor, ListChunkDescriptor
 from .wave_ixml_reader import WavIXMLFormat
 
 WavDataDescriptor = namedtuple('WavDataDescriptor','byte_count frame_count')
@@ -37,10 +37,12 @@ class WavInfoReader():
 
     def _find_chunk_data(self, ident, from_stream, default_none=False):
         chunk_descriptor = None
+        top_chunks = (chunk for chunk in self.main_list if type(chunk) is ChunkDescriptor)
+
         if default_none:
-            chunk_descriptor =next((chunk for chunk in self.main_list if chunk.ident == ident),None)
+            chunk_descriptor = next((chunk for chunk in top_chunks if chunk.ident == ident),None)
         else:
-            chunk_descriptor = next((chunk for chunk in self.main_list if chunk.ident == ident))
+            chunk_descriptor = next((chunk for chunk in top_chunks if chunk.ident == ident))
 
         if chunk_descriptor:
             return chunk_descriptor.read_data(from_stream)