0817085ada
Add ratings sync for music files (get rating details from music files and sync back to emby)
87 lines
2.8 KiB
Python
87 lines
2.8 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (C) 2006 Lukas Lalinsky
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation.
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"""Monkey's Audio streams with APEv2 tags.
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Monkey's Audio is a very efficient lossless audio compressor developed
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by Matt Ashland.
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For more information, see http://www.monkeysaudio.com/.
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"""
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__all__ = ["MonkeysAudio", "Open", "delete"]
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import struct
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from ._compat import endswith
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from mutagen import StreamInfo
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from mutagen.apev2 import APEv2File, error, delete
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from mutagen._util import cdata
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class MonkeysAudioHeaderError(error):
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pass
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class MonkeysAudioInfo(StreamInfo):
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"""Monkey's Audio stream information.
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Attributes:
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* channels -- number of audio channels
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* length -- file length in seconds, as a float
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* sample_rate -- audio sampling rate in Hz
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* bits_per_sample -- bits per sample
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* version -- Monkey's Audio stream version, as a float (eg: 3.99)
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"""
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def __init__(self, fileobj):
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header = fileobj.read(76)
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if len(header) != 76 or not header.startswith(b"MAC "):
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raise MonkeysAudioHeaderError("not a Monkey's Audio file")
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self.version = cdata.ushort_le(header[4:6])
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if self.version >= 3980:
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(blocks_per_frame, final_frame_blocks, total_frames,
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self.bits_per_sample, self.channels,
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self.sample_rate) = struct.unpack("<IIIHHI", header[56:76])
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else:
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compression_level = cdata.ushort_le(header[6:8])
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self.channels, self.sample_rate = struct.unpack(
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"<HI", header[10:16])
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total_frames, final_frame_blocks = struct.unpack(
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"<II", header[24:32])
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if self.version >= 3950:
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blocks_per_frame = 73728 * 4
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elif self.version >= 3900 or (self.version >= 3800 and
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compression_level == 4):
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blocks_per_frame = 73728
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else:
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blocks_per_frame = 9216
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self.version /= 1000.0
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self.length = 0.0
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if (self.sample_rate != 0) and (total_frames > 0):
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total_blocks = ((total_frames - 1) * blocks_per_frame +
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final_frame_blocks)
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self.length = float(total_blocks) / self.sample_rate
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def pprint(self):
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return u"Monkey's Audio %.2f, %.2f seconds, %d Hz" % (
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self.version, self.length, self.sample_rate)
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class MonkeysAudio(APEv2File):
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_Info = MonkeysAudioInfo
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_mimes = ["audio/ape", "audio/x-ape"]
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@staticmethod
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def score(filename, fileobj, header):
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return header.startswith(b"MAC ") + endswith(filename.lower(), ".ape")
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Open = MonkeysAudio
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