mirror of
https://github.com/iluvcapra/wavinfo.git
synced 2025-12-31 08:50:41 +00:00
UMID Implementation
This commit is contained in:
Jamie Hardt
BIN
tests/test_files/protools/umid.wav
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BIN
tests/test_files/protools/umid.wav
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Binary file not shown.
@@ -1,5 +1,10 @@
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import struct
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from typing import Union
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import binascii
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def binary_to_string(binary_value):
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return str(binascii.hexlify(binary_value), encoding='ascii')
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class UMIDParser:
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"""
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@@ -9,121 +14,111 @@ class UMIDParser:
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"""
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def __init__(self, raw_umid: bytearray):
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self.raw_umid = raw_umid
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@classmethod
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def binary_to_string(cls, binary_value):
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result_str = ''
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for n in range(len(binary_value)):
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result_str = '{:x}'.format(binary_value[n]) + result_str
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return result_str
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@property
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def universal_label(self) -> bytearray:
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return self.raw_umid[0:12]
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@property
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def basic_umid(self):
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return self.raw_umid[0:32]
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#
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# @property
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# def universal_label(self) -> bytearray:
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# return self.raw_umid[0:12]
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#
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# @property
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# def basic_umid(self):
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# return self.raw_umid[0:32]
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def basic_umid_to_str(self):
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return "%024x-%06x-%032x" % (self.binary_to_string(self.universal_label),
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self.binary_to_string(self.instance_number),
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self.binary_to_string(self.material_number))
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@property
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def universal_label_is_valid(self) -> bool:
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valid_preamble = b'\x06\x0a\x2b\x34\x01\x01\x01\x05\x01\x01'
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return self.universal_label[0:len(valid_preamble)] == valid_preamble
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@property
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def material_type(self) -> str:
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material_byte = self.raw_umid[10]
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if material_byte == 0x1:
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return 'picture'
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elif material_byte == 0x2:
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return 'audio'
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elif material_byte == 0x3:
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return 'data'
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elif material_byte == 0x4:
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return 'other'
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elif material_byte == 0x5:
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return 'picture_single_component'
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elif material_byte == 0x6:
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return 'picture_multiple_component'
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elif material_byte == 0x7:
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return 'audio_single_component'
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elif material_byte == 0x9:
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return 'audio_multiple_component'
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elif material_byte == 0xb:
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return 'auxiliary_single_component'
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elif material_byte == 0xc:
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return 'auxiliary_multiple_component'
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elif material_byte == 0xd:
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return 'mixed_components'
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elif material_byte == 0xf:
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return 'not_identified'
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else:
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return 'not_recognized'
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@property
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def material_number_creation_method(self) -> str:
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method_byte = self.raw_umid[11]
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method_byte = (method_byte << 4) & 0xf
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if method_byte == 0x0:
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return 'undefined'
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elif method_byte == 0x1:
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return 'smpte'
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elif method_byte == 0x2:
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return 'uuid'
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elif method_byte == 0x3:
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return 'masked'
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elif method_byte == 0x4:
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return 'ieee1394'
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elif 0x5 <= method_byte <= 0x7:
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return 'reserved_undefined'
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else:
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return 'unrecognized'
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@property
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def instance_number_creation_method(self) -> str:
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method_byte = self.raw_umid[11]
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method_byte = method_byte & 0xf
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if method_byte == 0x0:
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return 'undefined'
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elif method_byte == 0x01:
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return 'local_registration'
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elif method_byte == 0x02:
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return '24_bit_prs'
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elif method_byte == 0x03:
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return 'copy_number_and_16_bit_prs'
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elif 0x04 <= method_byte <= 0x0e:
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return 'reserved_undefined'
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elif method_byte == 0x0f:
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return 'live_stream'
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else:
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return 'unrecognized'
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@property
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def indicated_length(self) -> str:
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if self.raw_umid[12] == 0x13:
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return 'basic'
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elif self.raw_umid[12] == 0x33:
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return 'extended'
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@property
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def instance_number(self) -> bytearray:
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return self.raw_umid[13:3]
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@property
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def material_number(self) -> bytearray:
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return self.raw_umid[16:16]
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@property
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def source_pack(self) -> Union[bytearray, None]:
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if self.indicated_length == 'extended':
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return self.raw_umid[32:32]
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else:
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return None
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return binary_to_string(self.raw_umid[0:13]) + '-' + binary_to_string(self.raw_umid[13:3])
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#
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# @property
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# def universal_label_is_valid(self) -> bool:
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# valid_preamble = b'\x06\x0a\x2b\x34\x01\x01\x01\x05\x01\x01'
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# return self.universal_label[0:len(valid_preamble)] == valid_preamble
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#
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# @property
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# def material_type(self) -> str:
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# material_byte = self.raw_umid[10]
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# if material_byte == 0x1:
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# return 'picture'
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# elif material_byte == 0x2:
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# return 'audio'
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# elif material_byte == 0x3:
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# return 'data'
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# elif material_byte == 0x4:
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# return 'other'
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# elif material_byte == 0x5:
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# return 'picture_single_component'
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# elif material_byte == 0x6:
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# return 'picture_multiple_component'
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# elif material_byte == 0x7:
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# return 'audio_single_component'
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# elif material_byte == 0x9:
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# return 'audio_multiple_component'
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# elif material_byte == 0xb:
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# return 'auxiliary_single_component'
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# elif material_byte == 0xc:
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# return 'auxiliary_multiple_component'
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# elif material_byte == 0xd:
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# return 'mixed_components'
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# elif material_byte == 0xf:
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# return 'not_identified'
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# else:
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# return 'not_recognized'
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#
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# @property
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# def material_number_creation_method(self) -> str:
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# method_byte = self.raw_umid[11]
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# method_byte = (method_byte << 4) & 0xf
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# if method_byte == 0x0:
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# return 'undefined'
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# elif method_byte == 0x1:
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# return 'smpte'
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# elif method_byte == 0x2:
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# return 'uuid'
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# elif method_byte == 0x3:
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# return 'masked'
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# elif method_byte == 0x4:
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# return 'ieee1394'
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# elif 0x5 <= method_byte <= 0x7:
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# return 'reserved_undefined'
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# else:
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# return 'unrecognized'
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#
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# @property
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# def instance_number_creation_method(self) -> str:
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# method_byte = self.raw_umid[11]
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# method_byte = method_byte & 0xf
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# if method_byte == 0x0:
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# return 'undefined'
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# elif method_byte == 0x01:
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# return 'local_registration'
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# elif method_byte == 0x02:
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# return '24_bit_prs'
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# elif method_byte == 0x03:
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# return 'copy_number_and_16_bit_prs'
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# elif 0x04 <= method_byte <= 0x0e:
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# return 'reserved_undefined'
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# elif method_byte == 0x0f:
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# return 'live_stream'
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# else:
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# return 'unrecognized'
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#
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# @property
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# def indicated_length(self) -> str:
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# if self.raw_umid[12] == 0x13:
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# return 'basic'
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# elif self.raw_umid[12] == 0x33:
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# return 'extended'
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#
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# @property
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# def instance_number(self) -> bytearray:
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# return self.raw_umid[13:3]
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#
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# @property
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# def material_number(self) -> bytearray:
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# return self.raw_umid[16:16]
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#
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# @property
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# def source_pack(self) -> Union[bytearray, None]:
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# if self.indicated_length == 'extended':
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# return self.raw_umid[32:32]
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# else:
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# return None
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@@ -1,21 +1,22 @@
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import struct
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import binascii
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from .umid_parser import UMIDParser
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class WavBextReader:
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def __init__(self,bext_data,encoding):
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def __init__(self, bext_data, encoding):
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"""
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Read Broadcast-WAV extended metadata.
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:param best_data: The bytes-like data.
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"param encoding: The encoding to use when decoding the text fields of the
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BEXT metadata scope. According to EBU Rec 3285 this shall be ASCII.
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"""
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packstring = "<256s"+ "32s" + "32s" + "10s" + "8s" + "QH" + "64s" + "hhhhh" + "180s"
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packstring = "<256s" + "32s" + "32s" + "10s" + "8s" + "QH" + "64s" + "hhhhh" + "180s"
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rest_starts = struct.calcsize(packstring)
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unpacked = struct.unpack(packstring, bext_data[:rest_starts])
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def sanatize_bytes(bytes):
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first_null = next( (index for index, byte in enumerate(bytes) if byte == 0 ), None )
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first_null = next((index for index, byte in enumerate(bytes) if byte == 0), None)
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if first_null is not None:
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trimmed = bytes[:first_null]
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else:
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@@ -67,13 +68,13 @@ class WavBextReader:
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self.max_momentary_loudness = unpacked[11] / 100.0
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self.max_shortterm_loudness = unpacked[12] / 100.0
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def umid_to_str(self):
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if self.umid:
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return str(binascii.hexlify(self.umid), encoding='ascii')
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else:
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return None
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def to_dict(self):
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if self.umid is not None:
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umid_parsed = UMIDParser(self.umid)
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umid_str = umid_parsed.basic_umid_to_str()
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else:
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umid_str = None
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return {'description': self.description,
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'originator': self.originator,
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'originator_ref': self.originator_ref,
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@@ -81,7 +82,7 @@ class WavBextReader:
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'originator_time': self.originator_time,
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'time_reference': self.time_reference,
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'version': self.version,
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'umid': self.umid_to_str(),
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'umid': umid_str,
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'coding_history': self.coding_history,
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'loudness_value': self.loudness_value,
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'loudness_range': self.loudness_range,
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@@ -89,4 +90,3 @@ class WavBextReader:
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'max_momentary_loudness': self.max_momentary_loudness,
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'max_shortterm_loudness': self.max_shortterm_loudness
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}
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@@ -1,6 +1,6 @@
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from .riff_parser import parse_chunk, ListChunkDescriptor
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class WavInfoChunkReader:
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def __init__(self, f, encoding):
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@@ -9,53 +9,48 @@ class WavInfoChunkReader:
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f.seek(0)
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parsed_chunks = parse_chunk(f)
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list_chunks = [chunk for chunk in parsed_chunks.children \
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if type(chunk) is ListChunkDescriptor]
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list_chunks = [chunk for chunk in parsed_chunks.children if type(chunk) is ListChunkDescriptor]
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self.info_chunk = next((chunk for chunk in list_chunks \
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if chunk.signature == b'INFO'), None)
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self.info_chunk = next((chunk for chunk in list_chunks if chunk.signature == b'INFO'), None)
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#: 'ICOP' Copyright
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self.copyright = self._get_field(f,b'ICOP')
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self.copyright = self._get_field(f, b'ICOP')
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#: 'IPRD' Product
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self.product = self._get_field(f,b'IPRD')
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self.product = self._get_field(f, b'IPRD')
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#: 'IGNR' Genre
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self.genre = self._get_field(f,b'IGNR')
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self.genre = self._get_field(f, b'IGNR')
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#: 'ISBJ' Supject
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self.subject = self._get_field(f,b'ISBJ')
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self.subject = self._get_field(f, b'ISBJ')
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#: 'IART' Artist, composer, author
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self.artist = self._get_field(f,b'IART')
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self.artist = self._get_field(f, b'IART')
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#: 'ICMT' Comment
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self.comment = self._get_field(f,b'ICMT')
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self.comment = self._get_field(f, b'ICMT')
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#: 'ISFT' Software, encoding application
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self.software = self._get_field(f,b'ISFT')
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self.software = self._get_field(f, b'ISFT')
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#: 'ICRD' Created date
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self.created_date = self._get_field(f,b'ICRD')
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self.created_date = self._get_field(f, b'ICRD')
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#: 'IENG' Engineer
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self.engineer = self._get_field(f,b'IENG')
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self.engineer = self._get_field(f, b'IENG')
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#: 'ITCH' Technician
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self.technician = self._get_field(f,b'ITCH')
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self.technician = self._get_field(f, b'ITCH')
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#: 'IKEY' Keywords, keyword list
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self.keywords = self._get_field(f,b'IKEY')
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self.keywords = self._get_field(f, b'IKEY')
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#: 'INAM' Name, title
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self.title = self._get_field(f,b'INAM')
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self.title = self._get_field(f, b'INAM')
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#: 'ISRC' Source
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self.source = self._get_field(f,b'ISRC')
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self.source = self._get_field(f, b'ISRC')
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#: 'TAPE' Tape
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self.tape = self._get_field(f,b'TAPE')
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self.tape = self._get_field(f, b'TAPE')
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#: 'IARL' Archival Location
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self.archival_location = self._get_field(f,b'IARL')
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self.archival_location = self._get_field(f, b'IARL')
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#: 'ISFT' Software
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self.software = self._get_field(f,b'ISFT')
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self.software = self._get_field(f, b'ISFT')
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#: 'ICSM' Commissioned
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self.commissioned = self._get_field(f,b'ICMS')
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self.commissioned = self._get_field(f, b'ICMS')
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def _get_field(self, f, field_ident):
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search = next( ( (chunk.start, chunk.length) for chunk in self.info_chunk.children \
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if chunk.ident == field_ident ), None)
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search = next(((chunk.start, chunk.length) for chunk in self.info_chunk.children if chunk.ident == field_ident),
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None)
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if search is not None:
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f.seek(search[0])
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@@ -64,7 +59,6 @@ class WavInfoChunkReader:
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else:
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return None
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def to_dict(self):
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"""
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A dictionary with all of the key/values read from the INFO scope.
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@@ -82,14 +76,7 @@ class WavInfoChunkReader:
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'source': self.source,
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'tape': self.tape,
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'commissioned': self.commissioned,
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'software': self.software,
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'archival_location':self.archival_location,
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'archival_location': self.archival_location,
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'subject': self.subject,
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'technician':self.technician
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'technician': self.technician
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}
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