SickGear/lib/hachoir/parser/audio/real_audio.py
JackDandy 980e05cc99 Change Hachoir can't support PY2 so backport their PY3 to prevent a need for system dependant external binaries like mediainfo.
Backported 400 revisions from rev 1de4961-8897c5b (2018-2014).
Move core/benchmark, core/cmd_line, core/memory, core/profiler and core/timeout to core/optional/*
Remove metadata/qt*

PORT: Version 2.0a3 (inline with 3.0a3 @ f80c7d5).
Basic Support for XMP Packets.
tga: improvements to adhere more closely to the spec.
pdf: slightly improved parsing.
rar: fix TypeError on unknown block types.
Add MacRoman win32 codepage.
tiff/exif: support SubIFDs and tiled images.
Add method to export metadata in dictionary.
mpeg_video: don't attempt to parse Stream past length.
mpeg_video: parse ESCR correctly, add SCR value.
Change centralise CustomFragments.
field: don't set parser class if class is None, to enable autodetect.
field: add value/display for CustomFragment.
parser: inline warning to enable tracebacks in debug mode.
Fix empty bytestrings in makePrintable.
Fix contentSize in jpeg.py to account for image_data blocks.
Fix the ELF parser.
Enhance the AR archive parser.
elf parser: fix wrong wrong fields order in parsing little endian section flags.
elf parser: add s390 as a machine type.
Flesh out mp4 parser.

PORT: Version 2.0a1 (inline with 3.0a1).
Major refactoring and PEP8.
Fix ResourceWarning warnings on files. Add a close() method and support for the context manager protocol ("with obj: ...") to parsers, input and output streams.
metadata: get comment from ZIP.
Support for InputIOStream.read(0).
Fix sizeGe when size is None.
Remove unused new_seekable_field_set file.
Remove parser Mapsforge .map.
Remove parser Parallel Realities Starfighter .pak files.
sevenzip: fix for newer archives.
java: update access flags and modifiers for Java 1.7 and update description text for most recent Java.
Support ustar prefix field in tar archives.
Remove file_system* parsers.
Remove misc parsers 3d0, 3ds, gnome_keyring, msoffice*, mstask, ole*, word*.
Remove program parsers macho, nds, prc.
Support non-8bit Character subclasses.
Python parser supports Python 3.7.
Enhance mpeg_ts parser to support MTS/M2TS.
Support for creation date in tiff.
Change don't hardcode errno constant.

PORT: 1.9.1
Internal Only: The following are legacy reference to upstream commit messages.
Relevant changes up to b0a115f8.
Use integer division.
Replace HACHOIR_ERRORS with Exception.
Fix metadata.Data: make it sortable.
Import fixes from e7de492.
PORT: Version 2.0a1 (inline with 3.0a1 @ e9f8fad).
Replace hachoir.core.field with hachoir.field
Replace hachoir.core.stream with hachoir.stream
Remove the compatibility module for PY1.5 to PY2.5.
metadata: support TIFF picture.
metadata: fix string normalization.
metadata: fix datetime regex Fix hachoir bug #57.
FileFromInputStream: fix comparison between None and an int.
InputIOStream: open the file in binary mode.
2018-03-28 00:43:11 +01:00

92 lines
3.7 KiB
Python

"""
RealAudio (.ra) parser
Author: Mike Melanson
References:
http://wiki.multimedia.cx/index.php?title=RealMedia
Samples:
http://samples.mplayerhq.hu/real/RA/
"""
from hachoir.parser import Parser
from hachoir.field import (FieldSet,
UInt8, UInt16, UInt32,
Bytes, RawBytes, String,
PascalString8)
from hachoir.core.tools import humanFrequency
from hachoir.core.text_handler import displayHandler
from hachoir.core.endian import BIG_ENDIAN
class Metadata(FieldSet):
def createFields(self):
yield PascalString8(self, "title", charset="ISO-8859-1")
yield PascalString8(self, "author", charset="ISO-8859-1")
yield PascalString8(self, "copyright", charset="ISO-8859-1")
yield PascalString8(self, "comment", charset="ISO-8859-1")
class RealAudioFile(Parser):
MAGIC = ".ra\xFD"
PARSER_TAGS = {
"id": "real_audio",
"category": "audio",
"file_ext": ["ra"],
"mime": (u"audio/x-realaudio", u"audio/x-pn-realaudio"),
"min_size": 6 * 8,
"magic": ((MAGIC, 0),),
"description": u"Real audio (.ra)",
}
endian = BIG_ENDIAN
def validate(self):
if self["signature"].value != self.MAGIC:
return "Invalid signature"
if self["version"].value not in (3, 4):
return "Unknown version"
return True
def createFields(self):
yield Bytes(self, "signature", 4, r"RealAudio identifier ('.ra\xFD')")
yield UInt16(self, "version", "Version")
if self["version"].value == 3:
yield UInt16(self, "header_size", "Header size")
yield RawBytes(self, "Unknown1", 10)
yield UInt32(self, "data_size", "Data size")
yield Metadata(self, "metadata")
yield UInt8(self, "Unknown2")
yield PascalString8(self, "FourCC")
audio_size = self["data_size"].value
else: # version = 4
yield UInt16(self, "reserved1", "Reserved, should be 0")
yield String(self, "ra4sig", 4, "'.ra4' signature")
yield UInt32(self, "filesize", "File size (minus 40 bytes)")
yield UInt16(self, "version2", "Version 2 (always equal to version)")
yield UInt32(self, "headersize", "Header size (minus 16)")
yield UInt16(self, "codec_flavor", "Codec flavor")
yield UInt32(self, "coded_frame_size", "Coded frame size")
yield RawBytes(self, "unknown1", 12)
yield UInt16(self, "subpacketh", "Subpacket h (?)")
yield UInt16(self, "frame_size", "Frame size")
yield UInt16(self, "sub_packet_size", "Subpacket size")
yield UInt16(self, "unknown2", "Unknown")
yield displayHandler(UInt16(self, "sample_rate", "Sample rate"), humanFrequency)
yield UInt16(self, "unknown3", "Unknown")
yield UInt16(self, "sample_size", "Sample size")
yield UInt16(self, "channels", "Channels")
yield PascalString8(self, "Interleaving ID String")
yield PascalString8(self, "FourCC")
yield RawBytes(self, "unknown4", 3)
yield Metadata(self, "metadata")
audio_size = (self["filesize"].value + 40) - (self["headersize"].value + 16)
if 0 < audio_size:
yield RawBytes(self, "audio_data", audio_size)
def createDescription(self):
if (self["version"].value == 3):
return "RealAudio v3 file, '%s' codec" % self["FourCC"].value
elif (self["version"].value == 4):
return "RealAudio v4 file, '%s' codec, %s, %u channels" % (
self["FourCC"].value, self["sample_rate"].display, self["channels"].value)
else:
return "Real audio"