mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-16 01:45:08 +00:00
135 lines
4 KiB
Python
135 lines
4 KiB
Python
"""
|
|
Audio Interchange File Format (AIFF) parser.
|
|
|
|
Author: Victor Stinner
|
|
Creation: 27 december 2006
|
|
"""
|
|
|
|
from hachoir.parser import Parser
|
|
from hachoir.field import (FieldSet,
|
|
UInt16, UInt32, Float80, TimestampMac32,
|
|
RawBytes, NullBytes,
|
|
String, Enum, PascalString32)
|
|
from hachoir.core.endian import BIG_ENDIAN
|
|
from hachoir.core.text_handler import filesizeHandler
|
|
from hachoir.core.tools import alignValue
|
|
from hachoir.parser.audio.id3 import ID3v2
|
|
|
|
CODEC_NAME = {
|
|
'ACE2': "ACE 2-to-1",
|
|
'ACE8': "ACE 8-to-3",
|
|
'MAC3': "MAC 3-to-1",
|
|
'MAC6': "MAC 6-to-1",
|
|
'NONE': "None",
|
|
'sowt': "Little-endian, no compression",
|
|
}
|
|
|
|
|
|
class Comment(FieldSet):
|
|
|
|
def createFields(self):
|
|
yield TimestampMac32(self, "timestamp")
|
|
yield PascalString32(self, "text")
|
|
|
|
|
|
def parseText(self):
|
|
yield String(self, "text", self["size"].value)
|
|
|
|
|
|
def parseID3(self):
|
|
yield ID3v2(self, "id3v2", size=self["size"].value * 8)
|
|
|
|
|
|
def parseComment(self):
|
|
yield UInt16(self, "nb_comment")
|
|
for index in range(self["nb_comment"].value):
|
|
yield Comment(self, "comment[]")
|
|
|
|
|
|
def parseCommon(self):
|
|
yield UInt16(self, "nb_channel")
|
|
yield UInt32(self, "nb_sample")
|
|
yield UInt16(self, "sample_size")
|
|
yield Float80(self, "sample_rate")
|
|
yield Enum(String(self, "codec", 4, strip="\0", charset="ASCII"), CODEC_NAME)
|
|
|
|
|
|
def parseVersion(self):
|
|
yield TimestampMac32(self, "timestamp")
|
|
|
|
|
|
def parseSound(self):
|
|
yield UInt32(self, "offset")
|
|
yield UInt32(self, "block_size")
|
|
size = (self.size - self.current_size) // 8
|
|
if size:
|
|
yield RawBytes(self, "data", size)
|
|
|
|
|
|
class Chunk(FieldSet):
|
|
TAG_INFO = {
|
|
'COMM': ('common', "Common chunk", parseCommon),
|
|
'COMT': ('comment', "Comment", parseComment),
|
|
'NAME': ('name', "Name", parseText),
|
|
'AUTH': ('author', "Author", parseText),
|
|
'FVER': ('version', "Version", parseVersion),
|
|
'SSND': ('sound', "Sound data", parseSound),
|
|
'ID3 ': ('id3', "ID3", parseID3),
|
|
}
|
|
|
|
def __init__(self, *args):
|
|
FieldSet.__init__(self, *args)
|
|
self._size = (8 + alignValue(self["size"].value, 2)) * 8
|
|
tag = self["type"].value
|
|
if tag in self.TAG_INFO:
|
|
self._name, self._description, self._parser = self.TAG_INFO[tag]
|
|
else:
|
|
self._parser = None
|
|
|
|
def createFields(self):
|
|
yield String(self, "type", 4, "Signature (FORM)", charset="ASCII")
|
|
yield filesizeHandler(UInt32(self, "size"))
|
|
size = self["size"].value
|
|
if size:
|
|
if self._parser:
|
|
yield from self._parser(self)
|
|
if size % 2:
|
|
yield NullBytes(self, "padding", 1)
|
|
else:
|
|
yield RawBytes(self, "data", size)
|
|
|
|
|
|
class AiffFile(Parser):
|
|
PARSER_TAGS = {
|
|
"id": "aiff",
|
|
"category": "audio",
|
|
"file_ext": ("aif", "aiff", "aifc"),
|
|
"mime": ("audio/x-aiff",),
|
|
"magic_regex": ((b"FORM.{4}AIF[CF]", 0),),
|
|
"min_size": 12 * 8,
|
|
"description": "Audio Interchange File Format (AIFF)"
|
|
}
|
|
endian = BIG_ENDIAN
|
|
|
|
def validate(self):
|
|
if self.stream.readBytes(0, 4) != b"FORM":
|
|
return "Invalid signature"
|
|
if self.stream.readBytes(8 * 8, 4) not in (b"AIFF", b"AIFC"):
|
|
return "Invalid type"
|
|
return True
|
|
|
|
def createFields(self):
|
|
yield String(self, "signature", 4, "Signature (FORM)", charset="ASCII")
|
|
yield filesizeHandler(UInt32(self, "filesize"))
|
|
yield String(self, "type", 4, "Form type (AIFF or AIFC)", charset="ASCII")
|
|
while not self.eof:
|
|
yield Chunk(self, "chunk[]")
|
|
|
|
def createDescription(self):
|
|
if self["type"].value == "AIFC":
|
|
return "Audio Interchange File Format Compressed (AIFC)"
|
|
else:
|
|
return "Audio Interchange File Format (AIFF)"
|
|
|
|
def createContentSize(self):
|
|
return self["filesize"].value * 8
|