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# -*- coding: utf-8 -*-
from __future__ import absolute_import
from .base import Type
class Midi(Type):
"""
Implements the Midi audio type matcher.
"""
MIME = 'audio/midi'
EXTENSION = 'midi'
def __init__(self):
super(Midi, self).__init__(
mime=Midi.MIME,
extension=Midi.EXTENSION
)
def match(self, buf):
return (len(buf) > 3 and
buf[0] == 0x4D and
buf[1] == 0x54 and
buf[2] == 0x68 and
buf[3] == 0x64)
class Mp3(Type):
"""
Implements the MP3 audio type matcher.
"""
MIME = 'audio/mpeg'
EXTENSION = 'mp3'
def __init__(self):
super(Mp3, self).__init__(
mime=Mp3.MIME,
extension=Mp3.EXTENSION
)
def match(self, buf):
return (len(buf) > 2 and
((buf[0] == 0x49 and
buf[1] == 0x44 and
buf[2] == 0x33) or
(buf[0] == 0xFF and
buf[1] == 0xF2) or
(buf[0] == 0xFF and
buf[1] == 0xF3) or
(buf[0] == 0xFF and
buf[1] == 0xFB)))
class M4a(Type):
"""
Implements the M4A audio type matcher.
"""
MIME = 'audio/mp4'
EXTENSION = 'm4a'
def __init__(self):
super(M4a, self).__init__(
mime=M4a.MIME,
extension=M4a.EXTENSION
)
def match(self, buf):
return (len(buf) > 10 and
((buf[4] == 0x66 and
buf[5] == 0x74 and
buf[6] == 0x79 and
buf[7] == 0x70 and
buf[8] == 0x4D and
buf[9] == 0x34 and
buf[10] == 0x41) or
(buf[0] == 0x4D and
buf[1] == 0x34 and
buf[2] == 0x41 and
buf[3] == 0x20)))
class Ogg(Type):
"""
Implements the OGG audio type matcher.
"""
MIME = 'audio/ogg'
EXTENSION = 'ogg'
def __init__(self):
super(Ogg, self).__init__(
mime=Ogg.MIME,
extension=Ogg.EXTENSION
)
def match(self, buf):
return (len(buf) > 3 and
buf[0] == 0x4F and
buf[1] == 0x67 and
buf[2] == 0x67 and
buf[3] == 0x53)
class Flac(Type):
"""
Implements the FLAC audio type matcher.
"""
MIME = 'audio/x-flac'
EXTENSION = 'flac'
def __init__(self):
super(Flac, self).__init__(
mime=Flac.MIME,
extension=Flac.EXTENSION
)
def match(self, buf):
return (len(buf) > 3 and
buf[0] == 0x66 and
buf[1] == 0x4C and
buf[2] == 0x61 and
buf[3] == 0x43)
class Wav(Type):
"""
Implements the WAV audio type matcher.
"""
MIME = 'audio/x-wav'
EXTENSION = 'wav'
def __init__(self):
super(Wav, self).__init__(
mime=Wav.MIME,
extension=Wav.EXTENSION
)
def match(self, buf):
return (len(buf) > 11 and
buf[0] == 0x52 and
buf[1] == 0x49 and
buf[2] == 0x46 and
buf[3] == 0x46 and
buf[8] == 0x57 and
buf[9] == 0x41 and
buf[10] == 0x56 and
buf[11] == 0x45)
class Amr(Type):
"""
Implements the AMR audio type matcher.
"""
MIME = 'audio/amr'
EXTENSION = 'amr'
def __init__(self):
super(Amr, self).__init__(
mime=Amr.MIME,
extension=Amr.EXTENSION
)
def match(self, buf):
return (len(buf) > 11 and
buf[0] == 0x23 and
buf[1] == 0x21 and
buf[2] == 0x41 and
buf[3] == 0x4D and
buf[4] == 0x52 and
buf[5] == 0x0A)
class Aac(Type):
"""Implements the Aac audio type matcher."""
MIME = 'audio/aac'
EXTENSION = 'aac'
def __init__(self):
super(Aac, self).__init__(
mime=Aac.MIME,
extension=Aac.EXTENSION
)
def match(self, buf):
return (buf[:2] == bytearray([0xff, 0xf1]) or
buf[:2] == bytearray([0xff, 0xf9]))
class Aiff(Type):
"""
Implements the AIFF audio type matcher.
"""
MIME = 'audio/x-aiff'
EXTENSION = 'aiff'
def __init__(self):
super(Aiff, self).__init__(
mime=Aiff.MIME,
extension=Aiff.EXTENSION
)
def match(self, buf):
return (len(buf) > 11 and
buf[0] == 0x46 and
buf[1] == 0x4F and
buf[2] == 0x52 and
buf[3] == 0x4D and
buf[8] == 0x41 and
buf[9] == 0x49 and
buf[10] == 0x46 and
buf[11] == 0x46)
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