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980e05cc99
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.
88 lines
3.2 KiB
Python
88 lines
3.2 KiB
Python
"""
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AU audio file parser
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Author: Victor Stinner
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Creation: 12 july 2006
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"""
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from hachoir.parser import Parser
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from hachoir.field import UInt32, Enum, String, RawBytes
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from hachoir.core.endian import BIG_ENDIAN
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from hachoir.core.text_handler import displayHandler, filesizeHandler
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from hachoir.core.tools import createDict, humanFrequency
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class AuFile(Parser):
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PARSER_TAGS = {
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"id": "sun_next_snd",
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"category": "audio",
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"file_ext": ("au", "snd"),
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"mime": (u"audio/basic",),
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"min_size": 24 * 8,
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"magic": ((".snd", 0),),
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"description": "Sun/NeXT audio"
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}
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endian = BIG_ENDIAN
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CODEC_INFO = {
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1: (8, u"8-bit ISDN u-law"),
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2: (8, u"8-bit linear PCM"),
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3: (16, u"16-bit linear PCM"),
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4: (24, u"24-bit linear PCM"),
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5: (32, u"32-bit linear PCM"),
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6: (32, u"32-bit IEEE floating point"),
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7: (64, u"64-bit IEEE floating point"),
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8: (None, u"Fragmented sample data"),
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9: (None, u"DSP program"),
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10: (8, u"8-bit fixed point"),
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11: (16, u"16-bit fixed point"),
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12: (24, u"24-bit fixed point"),
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13: (32, u"32-bit fixed point"),
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18: (16, u"16-bit linear with emphasis"),
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19: (16, u"16-bit linear compressed"),
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20: (16, u"16-bit linear with emphasis and compression"),
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21: (None, u"Music kit DSP commands"),
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23: (None, u"4-bit ISDN u-law compressed (CCITT G.721 ADPCM)"),
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24: (None, u"ITU-T G.722 ADPCM"),
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25: (None, u"ITU-T G.723 3-bit ADPCM"),
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26: (None, u"ITU-T G.723 5-bit ADPCM"),
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27: (8, u"8-bit ISDN A-law"),
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}
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# Create bit rate and codec name dictionnaries
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BITS_PER_SAMPLE = createDict(CODEC_INFO, 0)
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CODEC_NAME = createDict(CODEC_INFO, 1)
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VALID_NB_CHANNEL = set((1, 2)) # FIXME: 4, 5, 7, 8 channels are supported?
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def validate(self):
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if self.stream.readBytes(0, 4) != ".snd":
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return "Wrong file signature"
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if self["channels"].value not in self.VALID_NB_CHANNEL:
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return "Invalid number of channel"
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return True
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def getBitsPerSample(self):
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"""
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Get bit rate (number of bit per sample per channel),
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may returns None if you unable to compute it.
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"""
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return self.BITS_PER_SAMPLE.get(self["codec"].value)
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def createFields(self):
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yield String(self, "signature", 4, 'Format signature (".snd")', charset="ASCII")
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yield UInt32(self, "data_ofs", "Data offset")
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yield filesizeHandler(UInt32(self, "data_size", "Data size"))
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yield Enum(UInt32(self, "codec", "Audio codec"), self.CODEC_NAME)
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yield displayHandler(UInt32(self, "sample_rate", "Number of samples/second"), humanFrequency)
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yield UInt32(self, "channels", "Number of interleaved channels")
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size = self["data_ofs"].value - self.current_size // 8
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if 0 < size:
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yield String(self, "info", size, "Information", strip=" \0", charset="ISO-8859-1")
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size = min(self["data_size"].value, (self.size - self.current_size) // 8)
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yield RawBytes(self, "audio_data", size, "Audio data")
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def createContentSize(self):
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return (self["data_ofs"].value + self["data_size"].value) * 8
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