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This commit is contained in:
Jamie Hardt
2023-11-06 15:56:58 -08:00
parent 18eda82ebd
commit 16d2609558
1 changed files with 6 additions and 5 deletions
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11
wavinfo/rf64_parser.py
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@@ -19,23 +19,24 @@ def parse_rf64(stream, signature = b'RF64') -> RF64Context:
assert(ds64_chunk.ident == b'ds64')
ds64_data = ds64_chunk.read_data(stream)
assert(len(ds64_data) >= ds64_fields_size )
assert(len(ds64_data) >= ds64_fields_size)
riff_size, data_size, sample_count, length_lookup_table = struct.unpack(
ds64_field_spec , ds64_data[0:ds64_fields_size] )
ds64_field_spec, ds64_data[0:ds64_fields_size])
bigchunk_table = {}
chunksize64format = "<4sL"
# chunksize64size = struct.calcsize(chunksize64format)
for _ in range(length_lookup_table):
bigname, bigsize = struct.unpack_from( chunksize64format , ds64_data,
offset= ds64_fields_size )
bigname, bigsize = struct.unpack_from(chunksize64format, ds64_data,
offset= ds64_fields_size)
bigchunk_table[bigname] = bigsize
bigchunk_table[b'data'] = data_size
bigchunk_table[signature] = riff_size
stream.seek(start, 0)
return RF64Context( sample_count=sample_count, bigchunk_table=bigchunk_table )
return RF64Context( sample_count=sample_count,
bigchunk_table=bigchunk_table)