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ADM impl

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This commit is contained in:
Jamie Hardt
2022-11-23 06:29:07 +00:00
parent 1eca249ba4
commit 68c75fc43f
2 changed files with 7 additions and 6 deletions
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5
wavinfo/wave_axml_reader.py → wavinfo/wave_adm_reader.py
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@@ -4,6 +4,7 @@ ADM Reader
from struct import unpack, unpack_from, calcsize from struct import unpack, unpack_from, calcsize
from dataclasses import dataclass from dataclasses import dataclass
from io import BytesIO
from lxml import etree as ET from lxml import etree as ET
@@ -26,7 +27,7 @@ class ChannelEntry:
"audioPackFormatID" "audioPackFormatID"
class WavAxmlReader: class WavADMReader:
""" """
Reads XML data from an EBU ADM (Audio Definiton Model) WAV File. Reads XML data from an EBU ADM (Audio Definiton Model) WAV File.
""" """
@@ -35,7 +36,7 @@ class WavAxmlReader:
header_fmt = "<HH" header_fmt = "<HH"
uid_fmt = "<H12s14s11sx" uid_fmt = "<H12s14s11sx"
self.axml = ET.fromstring(axml_data) self.axml = ET.parse(BytesIO(axml_data))
self.track_count, uid_count = unpack(header_fmt, chna_data) self.track_count, uid_count = unpack(header_fmt, chna_data)

8
wavinfo/wave_reader.py
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@@ -9,7 +9,7 @@ from .riff_parser import parse_chunk, ChunkDescriptor, ListChunkDescriptor
from .wave_ixml_reader import WavIXMLFormat from .wave_ixml_reader import WavIXMLFormat
from .wave_bext_reader import WavBextReader from .wave_bext_reader import WavBextReader
from .wave_info_reader import WavInfoChunkReader from .wave_info_reader import WavInfoChunkReader
from .wave_axml_reader import WavAxmlReader from .wave_adm_reader import WavADMReader
#: Calculated statistics about the audio data. #: Calculated statistics about the audio data.
WavDataDescriptor = namedtuple('WavDataDescriptor', 'byte_count frame_count') WavDataDescriptor = namedtuple('WavDataDescriptor', 'byte_count frame_count')
@@ -77,7 +77,7 @@ class WavInfoReader:
self.ixml = self._get_ixml(wavfile) self.ixml = self._get_ixml(wavfile)
#: :class:`wavinfo.wave_axml_reader.WavAxmlReader` with ADM metadata #: :class:`wavinfo.wave_axml_reader.WavAxmlReader` with ADM metadata
self.adm = self._get_axml(wavfile) self.adm = self._get_adm(wavfile)
#: :class:`wavinfo.wave_info_reader.WavInfoChunkReader` with RIFF INFO metadata #: :class:`wavinfo.wave_info_reader.WavInfoChunkReader` with RIFF INFO metadata
self.info = self._get_info(wavfile, encoding=self.info_encoding) self.info = self._get_info(wavfile, encoding=self.info_encoding)
@@ -134,10 +134,10 @@ class WavInfoReader:
bext_data = self._find_chunk_data(b'bext', f, default_none=True) bext_data = self._find_chunk_data(b'bext', f, default_none=True)
return WavBextReader(bext_data, encoding) if bext_data else None return WavBextReader(bext_data, encoding) if bext_data else None
def _get_axml(self, f): def _get_adm(self, f):
axml = self._find_chunk_data(b'axml', f, default_none=True) axml = self._find_chunk_data(b'axml', f, default_none=True)
chna = self._find_chunk_data(b'chna', f, default_none=True) chna = self._find_chunk_data(b'chna', f, default_none=True)
return WavAxmlReader(axml_data=axml, chna_data=chna) return WavADMReader(axml_data=axml, chna_data=chna) if axml and chna else None
def _get_ixml(self, f): def _get_ixml(self, f):
ixml_data = self._find_chunk_data(b'iXML', f, default_none=True) ixml_data = self._find_chunk_data(b'iXML', f, default_none=True)