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UMID Implementation

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This commit is contained in:
Jamie Hardt
2020-01-06 08:27:34 -08:00
parent 1b9547e8c2
commit 5a30ce3afc
4 changed files with 185 additions and 203 deletions
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tests/test_files/protools/umid.wav Normal file
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225
wavinfo/umid_parser.py
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@@ -1,5 +1,10 @@
import struct
from typing import Union
import binascii
def binary_to_string(binary_value):
return str(binascii.hexlify(binary_value), encoding='ascii')
class UMIDParser:
"""
@@ -9,121 +14,111 @@ class UMIDParser:
"""
def __init__(self, raw_umid: bytearray):
self.raw_umid = raw_umid
@classmethod
def binary_to_string(cls, binary_value):
result_str = ''
for n in range(len(binary_value)):
result_str = '{:x}'.format(binary_value[n]) + result_str
return result_str
@property
def universal_label(self) -> bytearray:
return self.raw_umid[0:12]
@property
def basic_umid(self):
return self.raw_umid[0:32]
#
# @property
# def universal_label(self) -> bytearray:
# return self.raw_umid[0:12]
#
# @property
# def basic_umid(self):
# return self.raw_umid[0:32]
def basic_umid_to_str(self):
return "%024x-%06x-%032x" % (self.binary_to_string(self.universal_label),
self.binary_to_string(self.instance_number),
self.binary_to_string(self.material_number))
@property
def universal_label_is_valid(self) -> bool:
valid_preamble = b'\x06\x0a\x2b\x34\x01\x01\x01\x05\x01\x01'
return self.universal_label[0:len(valid_preamble)] == valid_preamble
@property
def material_type(self) -> str:
material_byte = self.raw_umid[10]
if material_byte == 0x1:
return 'picture'
elif material_byte == 0x2:
return 'audio'
elif material_byte == 0x3:
return 'data'
elif material_byte == 0x4:
return 'other'
elif material_byte == 0x5:
return 'picture_single_component'
elif material_byte == 0x6:
return 'picture_multiple_component'
elif material_byte == 0x7:
return 'audio_single_component'
elif material_byte == 0x9:
return 'audio_multiple_component'
elif material_byte == 0xb:
return 'auxiliary_single_component'
elif material_byte == 0xc:
return 'auxiliary_multiple_component'
elif material_byte == 0xd:
return 'mixed_components'
elif material_byte == 0xf:
return 'not_identified'
else:
return 'not_recognized'
@property
def material_number_creation_method(self) -> str:
method_byte = self.raw_umid[11]
method_byte = (method_byte << 4) & 0xf
if method_byte == 0x0:
return 'undefined'
elif method_byte == 0x1:
return 'smpte'
elif method_byte == 0x2:
return 'uuid'
elif method_byte == 0x3:
return 'masked'
elif method_byte == 0x4:
return 'ieee1394'
elif 0x5 <= method_byte <= 0x7:
return 'reserved_undefined'
else:
return 'unrecognized'
@property
def instance_number_creation_method(self) -> str:
method_byte = self.raw_umid[11]
method_byte = method_byte & 0xf
if method_byte == 0x0:
return 'undefined'
elif method_byte == 0x01:
return 'local_registration'
elif method_byte == 0x02:
return '24_bit_prs'
elif method_byte == 0x03:
return 'copy_number_and_16_bit_prs'
elif 0x04 <= method_byte <= 0x0e:
return 'reserved_undefined'
elif method_byte == 0x0f:
return 'live_stream'
else:
return 'unrecognized'
@property
def indicated_length(self) -> str:
if self.raw_umid[12] == 0x13:
return 'basic'
elif self.raw_umid[12] == 0x33:
return 'extended'
@property
def instance_number(self) -> bytearray:
return self.raw_umid[13:3]
@property
def material_number(self) -> bytearray:
return self.raw_umid[16:16]
@property
def source_pack(self) -> Union[bytearray, None]:
if self.indicated_length == 'extended':
return self.raw_umid[32:32]
else:
return None
return binary_to_string(self.raw_umid[0:13]) + '-' + binary_to_string(self.raw_umid[13:3])
#
# @property
# def universal_label_is_valid(self) -> bool:
# valid_preamble = b'\x06\x0a\x2b\x34\x01\x01\x01\x05\x01\x01'
# return self.universal_label[0:len(valid_preamble)] == valid_preamble
#
# @property
# def material_type(self) -> str:
# material_byte = self.raw_umid[10]
# if material_byte == 0x1:
# return 'picture'
# elif material_byte == 0x2:
# return 'audio'
# elif material_byte == 0x3:
# return 'data'
# elif material_byte == 0x4:
# return 'other'
# elif material_byte == 0x5:
# return 'picture_single_component'
# elif material_byte == 0x6:
# return 'picture_multiple_component'
# elif material_byte == 0x7:
# return 'audio_single_component'
# elif material_byte == 0x9:
# return 'audio_multiple_component'
# elif material_byte == 0xb:
# return 'auxiliary_single_component'
# elif material_byte == 0xc:
# return 'auxiliary_multiple_component'
# elif material_byte == 0xd:
# return 'mixed_components'
# elif material_byte == 0xf:
# return 'not_identified'
# else:
# return 'not_recognized'
#
# @property
# def material_number_creation_method(self) -> str:
# method_byte = self.raw_umid[11]
# method_byte = (method_byte << 4) & 0xf
# if method_byte == 0x0:
# return 'undefined'
# elif method_byte == 0x1:
# return 'smpte'
# elif method_byte == 0x2:
# return 'uuid'
# elif method_byte == 0x3:
# return 'masked'
# elif method_byte == 0x4:
# return 'ieee1394'
# elif 0x5 <= method_byte <= 0x7:
# return 'reserved_undefined'
# else:
# return 'unrecognized'
#
# @property
# def instance_number_creation_method(self) -> str:
# method_byte = self.raw_umid[11]
# method_byte = method_byte & 0xf
# if method_byte == 0x0:
# return 'undefined'
# elif method_byte == 0x01:
# return 'local_registration'
# elif method_byte == 0x02:
# return '24_bit_prs'
# elif method_byte == 0x03:
# return 'copy_number_and_16_bit_prs'
# elif 0x04 <= method_byte <= 0x0e:
# return 'reserved_undefined'
# elif method_byte == 0x0f:
# return 'live_stream'
# else:
# return 'unrecognized'
#
# @property
# def indicated_length(self) -> str:
# if self.raw_umid[12] == 0x13:
# return 'basic'
# elif self.raw_umid[12] == 0x33:
# return 'extended'
#
# @property
# def instance_number(self) -> bytearray:
# return self.raw_umid[13:3]
#
# @property
# def material_number(self) -> bytearray:
# return self.raw_umid[16:16]
#
# @property
# def source_pack(self) -> Union[bytearray, None]:
# if self.indicated_length == 'extended':
# return self.raw_umid[32:32]
# else:
# return None

16
wavinfo/wave_bext_reader.py
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@@ -1,5 +1,6 @@
import struct
import binascii
from .umid_parser import UMIDParser
class WavBextReader:
def __init__(self, bext_data, encoding):
@@ -67,13 +68,13 @@ class WavBextReader:
self.max_momentary_loudness = unpacked[11] / 100.0
self.max_shortterm_loudness = unpacked[12] / 100.0
def umid_to_str(self):
if self.umid:
return str(binascii.hexlify(self.umid), encoding='ascii')
else:
return None
def to_dict(self):
if self.umid is not None:
umid_parsed = UMIDParser(self.umid)
umid_str = umid_parsed.basic_umid_to_str()
else:
umid_str = None
return {'description': self.description,
'originator': self.originator,
'originator_ref': self.originator_ref,
@@ -81,7 +82,7 @@ class WavBextReader:
'originator_time': self.originator_time,
'time_reference': self.time_reference,
'version': self.version,
'umid': self.umid_to_str(),
'umid': umid_str,
'coding_history': self.coding_history,
'loudness_value': self.loudness_value,
'loudness_range': self.loudness_range,
@@ -89,4 +90,3 @@ class WavBextReader:
'max_momentary_loudness': self.max_momentary_loudness,
'max_shortterm_loudness': self.max_shortterm_loudness
}

23
wavinfo/wave_info_reader.py
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@@ -1,6 +1,6 @@
from .riff_parser import parse_chunk, ListChunkDescriptor
class WavInfoChunkReader:
def __init__(self, f, encoding):
@@ -9,11 +9,9 @@ class WavInfoChunkReader:
f.seek(0)
parsed_chunks = parse_chunk(f)
list_chunks = [chunk for chunk in parsed_chunks.children \
if type(chunk) is ListChunkDescriptor]
list_chunks = [chunk for chunk in parsed_chunks.children if type(chunk) is ListChunkDescriptor]
self.info_chunk = next((chunk for chunk in list_chunks \
if chunk.signature == b'INFO'), None)
self.info_chunk = next((chunk for chunk in list_chunks if chunk.signature == b'INFO'), None)
#: 'ICOP' Copyright
self.copyright = self._get_field(f, b'ICOP')
@@ -50,12 +48,9 @@ class WavInfoChunkReader:
#: 'ICSM' Commissioned
self.commissioned = self._get_field(f, b'ICMS')
def _get_field(self, f, field_ident):
search = next( ( (chunk.start, chunk.length) for chunk in self.info_chunk.children \
if chunk.ident == field_ident ), None)
search = next(((chunk.start, chunk.length) for chunk in self.info_chunk.children if chunk.ident == field_ident),
None)
if search is not None:
f.seek(search[0])
@@ -64,7 +59,6 @@ class WavInfoChunkReader:
else:
return None
def to_dict(self):
"""
A dictionary with all of the key/values read from the INFO scope.
@@ -82,14 +76,7 @@ class WavInfoChunkReader:
'source': self.source,
'tape': self.tape,
'commissioned': self.commissioned,
'software': self.software,
'archival_location': self.archival_location,
'subject': self.subject,
'technician': self.technician
}