def createFields(self):
yield String(self,
"signature",
4,
"PSD signature (8BPS)",
charset="ASCII")
yield UInt16(self, "version")
yield NullBytes(self, "reserved[]", 6)
yield UInt16(self, "nb_channels")
yield UInt32(self, "width")
yield UInt32(self, "height")
yield UInt16(self, "depth")
yield Enum(UInt16(self, "color_mode"), self.COLOR_MODE)
# Mode data
yield UInt32(self, "mode_data_size")
size = self["mode_data_size"].value
if size:
yield RawBytes(self, "mode_data", size)
# Resources
yield Config(self, "config")
# Reserved
yield UInt32(self, "reserved_data_size")
size = self["reserved_data_size"].value
if size:
yield RawBytes(self, "reserved_data", size)
yield Enum(UInt16(self, "compression"), self.COMPRESSION_NAME)
size = (self.size - self.current_size) // 8
if size:
yield RawBytes(self, "end", size)
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 createFields(self):
byte = UInt8(self, "id_size")
yield byte
byte = byte.value
self.info("ID=%u" % byte)
size = byte & 0xF
if size > 0:
name = self.stream.readBytes(self.absolute_address+self.current_size, size)
if name in self.CODECS:
name = self.CODECS[name]
self.info("Codec is %s" % name)
else:
self.info("Undetermined codec %s" % name)
name = "unknown"
yield RawBytes(self, name, size)
#yield textHandler(Bytes(self, "id", size), lambda: name)
if byte & 0x10:
yield SZUInt64(self, "num_stream_in")
yield SZUInt64(self, "num_stream_out")
self.info("Streams: IN=%u OUT=%u" % \
(self["num_stream_in"].value, self["num_stream_out"].value))
if byte & 0x20:
size = SZUInt64(self, "properties_size[]")
yield size
if size.value == 5:
#[email protected]
yield textHandler(UInt8(self, "parameters"), lzmaParams)
yield filesizeHandler(UInt32(self, "dictionary_size"))
elif size.value > 0:
yield RawBytes(self, "properties[]", size.value)
def createFields(self):
yield UInt32(self, "inodes_count", "Inodes count")
yield UInt32(self, "blocks_count", "Blocks count")
yield UInt32(self, "r_blocks_count", "Reserved blocks count")
yield UInt32(self, "free_blocks_count", "Free blocks count")
yield UInt32(self, "free_inodes_count", "Free inodes count")
yield UInt32(self, "first_data_block", "First data block")
yield UInt32(self, "log_block_size", "Block size")
yield UInt32(self, "log_frag_size", "Fragment size")
yield UInt32(self, "blocks_per_group", "Blocks per group")
yield UInt32(self, "frags_per_group", "Fragments per group")
yield UInt32(self, "inodes_per_group", "Inodes per group")
yield TimestampUnix32(self, "mtime", "Mount time")
yield TimestampUnix32(self, "wtime", "Write time")
yield UInt16(self, "mnt_count", "Mount count")
yield UInt16(self, "max_mnt_count", "Max mount count")
yield String(self, "magic", 2, "Magic number (0x53EF)")
yield Enum(UInt16(self, "state", "File system state"), self.state_desc)
yield Enum(UInt16(self, "errors", "Behaviour when detecting errors"),
self.error_handling_desc)
yield UInt16(self, "minor_rev_level", "Minor revision level")
yield TimestampUnix32(self, "last_check", "Time of last check")
yield textHandler(
UInt32(self, "check_interval", "Maximum time between checks"),
self.postMaxTime)
yield Enum(UInt32(self, "creator_os", "Creator OS"), self.os_name)
yield UInt32(self, "rev_level", "Revision level")
yield UInt16(self, "def_resuid", "Default uid for reserved blocks")
yield UInt16(self, "def_resgid", "Default gid for reserved blocks")
yield UInt32(self, "first_ino", "First non-reserved inode")
yield UInt16(self, "inode_size", "Size of inode structure")
yield UInt16(self, "block_group_nr",
"Block group # of this superblock")
yield UInt32(self, "feature_compat", "Compatible feature set")
yield UInt32(self, "feature_incompat", "Incompatible feature set")
yield UInt32(self, "feature_ro_compat",
"Read-only compatible feature set")
yield RawBytes(self, "uuid", 16, "128-bit uuid for volume")
yield String(self, "volume_name", 16, "Volume name", strip="\0")
yield String(self,
"last_mounted",
64,
"Directory where last mounted",
strip="\0")
yield UInt32(self, "compression",
"For compression (algorithm usage bitmap)")
yield UInt8(self, "prealloc_blocks",
"Number of blocks to try to preallocate")
yield UInt8(self, "prealloc_dir_blocks",
"Number to preallocate for directories")
yield UInt16(self, "padding", "Padding")
yield String(self, "journal_uuid", 16, "uuid of journal superblock")
yield UInt32(self, "journal_inum", "inode number of journal file")
yield UInt32(self, "journal_dev", "device number of journal file")
yield UInt32(self, "last_orphan", "start of list of inodes to delete")
yield RawBytes(self, "reserved", 197, "Reserved")
def parseEBML(self):
yield Unsigned(self, 'size')
for i in xrange(1, self.n_frames):
yield Signed(self, 'dsize[]')
size = self['size'].value
yield RawBytes(self, 'frame[]', size)
for i in xrange(self.n_frames - 1):
size += self['dsize[' + str(i) + ']'].value
yield RawBytes(self, 'frame[]', size)
yield RawBytes(self, 'frame[]', (self._size - self.current_size) / 8)
def createFields(self):
yield Enum(UInt8(self, "type", "Volume descriptor type"),
self.type_name)
yield RawBytes(self, "signature", 5, "ISO 9960 signature (CD001)")
if self["signature"].value != "CD001":
raise ParserError("Invalid ISO 9960 volume signature")
yield UInt8(self, "version", "Volume descriptor version")
cls = self.content_handler.get(self["type"].value, None)
if cls:
yield cls(self, "content")
else:
yield RawBytes(self, "raw_content", 2048 - 7)
def parseApplicationExtension(parent):
yield PascalString8(parent, "app_name", "Application name")
yield UInt8(parent, "size")
size = parent["size"].value
if parent["app_name"].value == "NETSCAPE2.0" and size == 3:
yield Enum(UInt8(parent, "netscape_code"), NETSCAPE_CODE)
if parent["netscape_code"].value == 1:
yield UInt16(parent, "loop_count")
else:
yield RawBytes(parent, "raw", 2)
else:
yield RawBytes(parent, "raw", size)
yield NullBytes(parent, "terminator", 1, "Terminator (0)")
def createFields(self):
if "encoded_hdr" in self["/next_hdr/"]:
pack_size = sum([s.value for s in self.array("/next_hdr/encoded_hdr/pack_info/pack_size")])
body_size = self["/next_hdr/encoded_hdr/pack_info/pack_pos"].value
yield RawBytes(self, "compressed_data", body_size, "Compressed data")
# Here we could check if copy method was used to "compress" it,
# but this never happens, so just output "compressed file info"
yield RawBytes(self, "compressed_file_info", pack_size,
"Compressed file information")
size = (self._size//8) - pack_size - body_size
if size > 0:
yield RawBytes(self, "unknown_data", size)
elif "header" in self["/next_hdr"]:
yield RawBytes(self, "compressed_data", self._size//8, "Compressed data")
def createFields(self):
yield textHandler(UInt8(self, "sync", 8), hexadecimal)
if self["sync"].value != 0x47:
raise ParserError("MPEG-2 TS: Invalid synchronization byte")
yield Bit(self, "has_error")
yield Bit(self, "payload_unit_start")
yield Bit(self, "priority")
yield Enum(textHandler(Bits(self, "pid", 13, "Program identifier"), hexadecimal), self.PID)
yield Bits(self, "scrambling_control", 2)
yield Bit(self, "has_adaptation")
yield Bit(self, "has_payload")
yield Bits(self, "counter", 4)
yield RawBytes(self, "payload", 184)
if self["has_error"].value:
yield RawBytes(self, "error_correction", 16)
def createFields(self):
yield UInt32(self, "size")
yield String(self, "name", 22, charset="ASCII", strip=" \0")
# Doc says type is always 0, but I've found values of 24 and 96 for
# the _same_ song here, just different download sources for the file
yield UInt8(self, "type")
yield UInt16(self, "samples")
num = self["samples"].value
self.info(self.createDescription())
if num:
yield InstrumentSecondHeader(self, "second_header")
for field in self.fixInstrumentHeader():
yield field
# This part probably wrong
sample_size = []
for index in xrange(num):
sample = SampleHeader(self, "sample_header[]")
yield sample
sample_size.append(sample["length"].value)
for size in sample_size:
if size:
yield RawBytes(self, "sample_data[]", size, "Deltas")
else:
for field in self.fixInstrumentHeader():
yield field
def createFields(self):
# First kilobyte: boot sectors
yield RawBytes(self, "boot", 1024, "Space for disklabel etc.")
# Header
yield UInt32(self, "version")
yield UInt32(self, "last_page")
yield UInt32(self, "nb_badpage")
yield UUID(self, "sws_uuid")
yield UUID(self, "sws_volume")
yield NullBytes(self, "reserved", 117*4)
# Read bad pages (if any)
count = self["nb_badpage"].value
if count:
if MAX_SWAP_BADPAGES < count:
raise ParserError("Invalid number of bad page (%u)" % count)
yield GenericVector(self, "badpages", count, UInt32, "badpage")
# Read magic
padding = self.seekByte(PAGE_SIZE - 10, "padding", null=True)
if padding:
yield padding
yield String(self, "magic", 10, charset="ASCII")
# Read all pages
yield GenericVector(self, "pages", self["last_page"].value, Page, "page")
# Padding at the end
padding = self.seekBit(self.size, "end_padding", null=True)
if padding:
yield padding
def createFields(self):
yield Enum(UInt16(self, "field_id", "Extra field ID"),
self.EXTRA_FIELD_ID)
size = UInt16(self, "field_data_size", "Extra field data size")
yield size
if size.value > 0:
yield RawBytes(self, "field_data", size, "Unknown field data")
def createFields(self):
yield ZipVersion(self, "version_made_by", "Version made by")
for field in ZipStartCommonFields(self):
yield field
# Check unicode status
charset = zipGetCharset(self)
yield UInt16(self, "comment_length", "Comment length")
yield UInt16(self, "disk_number_start", "Disk number start")
yield UInt16(self, "internal_attr", "Internal file attributes")
yield UInt32(self, "external_attr", "External file attributes")
yield UInt32(self, "offset_header", "Relative offset of local header")
yield String(self,
"filename",
self["filename_length"].value,
"Filename",
charset=charset)
if 0 < self["extra_length"].value:
yield RawBytes(self, "extra", self["extra_length"].value,
"Extra fields")
if 0 < self["comment_length"].value:
yield String(self,
"comment",
self["comment_length"].value,
"Comment",
charset=charset)
def createFields(self):
yield RawBytes(self, "marker", len(self.MAGIC))
yield LineEnd(self, "line_end[]")
yield String(self, "start_attribute_marker", 2)
addr = self.absolute_address + self.current_size
while self.stream.readBytes(addr, 2) != '>>':
t = PDFName(self, "type[]")
yield t
name = t.value
self.info("Parsing PDFName '%s'" % name)
if name == "Size":
yield PDFNumber(self, "size", "Entries in the file cross-reference section")
elif name == "Prev":
yield PDFNumber(self, "offset")
elif name == "Root":
yield Catalog(self, "object_catalog")
elif name == "Info":
yield Catalog(self, "info")
elif name == "ID":
yield PDFArray(self, "id")
elif name == "Encrypt":
yield PDFDictionary(self, "decrypt")
else:
raise ParserError("Don't know trailer type '%s'" % name)
addr = self.absolute_address + self.current_size
yield String(self, "end_attribute_marker", 2)
yield LineEnd(self, "line_end[]")
yield String(self, "start_xref", 9)
yield LineEnd(self, "line_end[]")
yield PDFNumber(self, "cross_ref_table_start_address")
yield LineEnd(self, "line_end[]")
yield String(self, "end_marker", len(ENDMAGIC))
yield LineEnd(self, "line_end[]")
def createFields(self):
# Header
yield PaddingBits(self,
"sync",
11,
"Synchronize bits (set to 1)",
pattern=1)
yield Enum(Bits(self, "version", 2, "MPEG audio version"),
self.VERSION_NAME)
yield Enum(Bits(self, "layer", 2, "MPEG audio layer"), self.LAYER_NAME)
yield Bit(self, "crc16", "No CRC16 protection?")
# Rates and padding
yield Bits(self, "bit_rate", 4, "Bit rate")
yield Bits(self, "sampling_rate", 2, "Sampling rate")
yield Bit(self, "use_padding", "Stream field use padding?")
yield Bit(self, "extension", "Extension")
# Channel mode, mode extension, copyright, ...
yield Enum(Bits(self, "channel_mode", 2, "Channel mode"),
self.CHANNEL_MODE_NAME)
yield Bits(self, "mode_ext", 2, "Mode extension")
yield Bit(self, "copyright", "Is copyrighted?")
yield Bit(self, "original", "Is original?")
yield Enum(Bits(self, "emphasis", 2, "Emphasis"), self.EMPHASIS_NAME)
size = (self.size - self.current_size) / 8
if size:
yield RawBytes(self, "data", size)
def createFields(self):
yield Bit(self, "sync[]") # =True
yield Bits(self, "ext_length", 7)
yield NullBits(self, "reserved[]", 8)
size = self["ext_length"].value
if size:
yield RawBytes(self, "ext_bytes", size)
def createFields(self):
yield UInt8(self, "id", "PCX identifier (10)")
yield Enum(UInt8(self, "version", "PCX version"), self.version_name)
yield Enum(UInt8(self, "compression", "Compression method"),
self.compression_name)
yield UInt8(self, "bpp", "Bits / pixel")
yield UInt16(self, "xmin", "Minimum X")
yield UInt16(self, "ymin", "Minimum Y")
yield UInt16(self, "xmax", "Width minus one") # value + 1
yield UInt16(self, "ymax", "Height minus one") # value + 1
yield UInt16(self, "horiz_dpi", "Horizontal DPI")
yield UInt16(self, "vert_dpi", "Vertical DPI")
yield PaletteRGB(self, "palette_4bits", 16, "Palette (4 bits)")
yield PaddingBytes(self, "reserved[]", 1)
yield UInt8(self, "nb_color_plan", "Number of color plans")
yield UInt16(self, "bytes_per_line", "Bytes per line")
yield UInt16(self, "color_mode", "Color mode")
yield PaddingBytes(self, "reserved[]", 58)
if self._size is None: # TODO: is it possible to handle piped input?
raise NotImplementedError
nb_colors = 256
size = (self._size - self.current_size) / 8
has_palette = self["bpp"].value == 8
if has_palette:
size -= nb_colors * 3
yield RawBytes(self, "image_data", size, "Image data")
if has_palette:
yield PaletteRGB(self, "palette_8bits", nb_colors,
"Palette (8 bit)")
def createFields(self):
addr = self.absolute_address
len = self.stream.searchBytesLength(':', False, addr,
addr + (MAX_STRING_LENGTH + 1) * 8)
if len is None:
raise ParserError("Torrent: unable to find string separator (':')")
if not len:
raise ParserError("Torrent: error: no string length!")
val = String(self, "length", len, "String length")
yield val
try:
len = int(val.value)
except ValueError:
len = -1
if len < 0:
raise ParserError(
"Invalid string length (%s)" %
makePrintable(val.value, "ASCII", to_unicode=True))
yield String(self, "separator", 1, "String length/value separator")
if not len:
self.info("Empty string: len=%i" % len)
return
if len < 512:
yield String(self,
"value",
len,
"String value",
charset="ISO-8859-1")
else:
# Probably raw data
yield RawBytes(self, "value", len, "Raw data")
def createFields(self):
while self.stream.readBytes(self.absolute_address+self.current_size, 1) == '%':
size = getLineEnd(self, 4)
if size == 2:
yield textHandler(UInt16(self, "crc32"), hexadecimal)
elif size == 4:
yield textHandler(UInt32(self, "crc32"), hexadecimal)
elif self.stream.readBytes(self.absolute_address+self.current_size, size).isalpha():
yield String(self, "comment[]", size)
else:
RawBytes(self, "unknown_data[]", size)
yield LineEnd(self, "line_end[]")
#abs_offset = self.current_size//8
# TODO: yield objects that read offsets and deduce size from
# "/cross_ref_table/sub_section[]/entries/item[]"
offsets = []
for subsection in self.array("/cross_ref_table/sub_section"):
for obj in subsection.array("entries/item"):
if "byte_offset" in obj:
# Could be inserted already sorted
offsets.append(obj["byte_offset"].value)
offsets.append(self["/cross_ref_table"].absolute_address//8)
offsets.sort()
for index in xrange(len(offsets)-1):
yield Catalog(self, "object[]", size=offsets[index+1]-offsets[index])
def createFields(self):
yield Integer(self, "time", "Delta time in ticks")
yield Enum(textHandler(UInt8(self, "command"), hexadecimal), self.COMMAND_DESC)
command = self["command"].value
if command == 0xFF:
yield Enum(textHandler(UInt8(self, "meta_command"), hexadecimal), self.META_COMMAND_DESC)
yield UInt8(self, "data_len")
size = self["data_len"].value
if size:
command = self["meta_command"].value
if command in self.META_COMMAND_PARSER:
parser = self.META_COMMAND_PARSER[command]
else:
parser = None
if parser:
for field in parser(self, size):
yield field
else:
yield RawBytes(self, "data", size)
else:
if command not in self.COMMAND_PARSER:
raise ParserError("Unknown command: %s" % self["command"].display)
parser = self.COMMAND_PARSER[command]
for field in parser(self):
yield field
def createFields(self):
start = self.absolute_address
size = self.stream.searchBytesLength("\0", False, start)
if size > 0:
self.info("Command: %s" % self.stream.readBytes(start, size))
yield String(self, "command", size, strip='\0')
yield RawBytes(self, "parameter", (self._size // 8) - size)
def createFields(self):
mbr = MasterBootRecord(self, "mbr")
yield mbr
# No error if we only want to analyse a backup of a mbr
if self.eof:
return
for start, index, header in sorted(
(hdr["LBA"].value, index, hdr)
for index, hdr in enumerate(mbr.headers) if hdr.isUsed()):
# Seek to the beginning of the partition
padding = self.seekByte(start * BLOCK_SIZE, "padding[]")
if padding:
yield padding
# Content of the partition
name = "partition[%u]" % index
size = BLOCK_SIZE * header["size"].value
desc = header["system"].display
if header["system"].value == 5:
yield Partition(self, name, desc, size * 8)
else:
yield RawBytes(self, name, size, desc)
# Padding at the end
if self.current_size < self._size:
yield self.seekBit(self._size, "end")
def createFields(self):
yield Unsigned(self, 'track')
yield Int16(self, 'timecode')
if self.parent._name == 'Block':
yield NullBits(self, 'reserved[]', 4)
yield Bit(self, 'invisible')
yield self.lacing()
yield NullBits(self, 'reserved[]', 1)
elif self.parent._name == 'SimpleBlock[]':
yield Bit(self, 'keyframe')
yield NullBits(self, 'reserved', 3)
yield Bit(self, 'invisible')
yield self.lacing()
yield Bit(self, 'discardable')
else:
yield NullBits(self, 'reserved', 8)
return
size = (self._size - self.current_size) / 8
lacing = self['lacing'].value
if lacing:
yield textHandler(GenericInteger(self, 'n_frames', False, 8),
lambda chunk: str(chunk.value + 1))
yield Lace(self, lacing - 1, size - 1)
else:
yield RawBytes(self, 'frame', size)
def createFields(self):
yield Bit(self, "has_private")
yield Bit(self, "has_pack_lgth")
yield Bit(self, "has_pack_seq")
yield Bit(self, "has_pstd_buffer")
yield Bits(self, "sync[]", 3) # =7
yield Bit(self, "has_extension2")
if self["has_private"].value:
yield RawBytes(self, "private", 16)
if self["has_pack_lgth"].value:
yield UInt8(self, "pack_lgth")
if self["has_pack_seq"].value:
yield Bit(self, "sync[]") # =True
yield Bits(self, "pack_seq_counter", 7)
yield Bit(self, "sync[]") # =True
yield Bit(self, "mpeg12_id")
yield Bits(self, "orig_stuffing_length", 6)
if self["has_pstd_buffer"].value:
yield Bits(self, "sync[]", 2) # =1
yield Enum(Bit(self, "pstd_buffer_scale"), {
True: "128 bytes",
False: "1024 bytes"
})
yield Bits(self, "pstd_size", 13)
def parseJpeg(parent, size):
yield UInt16(parent, "char_id", "Character identifier")
size -= 2
code = parent["code"].value
if code != Tag.TAG_BITS:
if code == Tag.TAG_BITS_JPEG3:
yield UInt32(parent, "alpha_offset", "Character identifier")
size -= 4
addr = parent.absolute_address + parent.current_size + 16
if parent.stream.readBytes(addr, 2) in ("\xff\xdb", "\xff\xd8"):
header = JpegHeader(parent, "jpeg_header")
yield header
hdr_size = header.size // 8
size -= hdr_size
else:
hdr_size = 0
if code == Tag.TAG_BITS_JPEG3:
img_size = parent["alpha_offset"].value - hdr_size
else:
img_size = size
else:
img_size = size
yield SubFile(parent, "image", img_size, "JPEG picture", parser=JpegFile)
if code == Tag.TAG_BITS_JPEG3:
size = (parent.size - parent.current_size) // 8
yield RawBytes(parent, "alpha", size, "Image data")
def parsePortableExecutable(self):
# Read PE header
yield PE_Header(self, "pe_header")
# Read PE optional header
size = self["pe_header/opt_hdr_size"].value
rsrc_rva = None
if size:
yield PE_OptHeader(self, "pe_opt_header", size=size*8)
if "pe_opt_header/resource/rva" in self:
rsrc_rva = self["pe_opt_header/resource/rva"].value
# Read section headers
sections = []
for index in xrange(self["pe_header/nb_section"].value):
section = SectionHeader(self, "section_hdr[]")
yield section
if section["phys_size"].value:
sections.append(section)
# Read sections
sections.sort(key=lambda field: field["phys_off"].value)
for section in sections:
self.seekByte(section["phys_off"].value)
size = section["phys_size"].value
if size:
name = section.createSectionName()
if rsrc_rva is not None and section["rva"].value == rsrc_rva:
yield PE_Resource(self, name, section, size=size*8)
else:
yield RawBytes(self, name, size)
def createFields(self):
LONG = Int32
yield UInt32(self, "type", "Record type (always 1)")
yield UInt32(self, "size", "Size of the header in bytes")
yield RECT32(self, "Bounds", "Inclusive bounds")
yield RECT32(self, "Frame", "Inclusive picture frame")
yield textHandler(UInt32(self, "signature", "Signature ID (always 0x464D4520)"), hexadecimal)
yield UInt16(self, "min_ver", "Minor version")
yield UInt16(self, "maj_ver", "Major version")
yield UInt32(self, "file_size", "Size of the file in bytes")
yield UInt32(self, "NumOfRecords", "Number of records in the metafile")
yield UInt16(self, "NumOfHandles", "Number of handles in the handle table")
yield NullBytes(self, "reserved", 2)
yield UInt32(self, "desc_size", "Size of description in 16-bit words")
yield UInt32(self, "desc_ofst", "Offset of description string in metafile")
yield UInt32(self, "nb_colors", "Number of color palette entries")
yield LONG(self, "width_px", "Width of reference device in pixels")
yield LONG(self, "height_px", "Height of reference device in pixels")
yield LONG(self, "width_mm", "Width of reference device in millimeters")
yield LONG(self, "height_mm", "Height of reference device in millimeters")
# Read description (if any)
offset = self["desc_ofst"].value
current = (self.absolute_address + self.current_size) // 8
size = self["desc_size"].value * 2
if offset == current and size:
yield String(self, "description", size, charset="UTF-16-LE", strip="\0 ")
# Read padding (if any)
size = self["size"].value - self.current_size//8
if size:
yield RawBytes(self, "padding", size)
def createFields(self):
yield Bytes(self, "signature", 4, r'File signature ("\1pcf")')
yield UInt32(self, "nb_toc")
entries = []
for index in xrange(self["nb_toc"].value):
entry = TOC(self, "toc[]")
yield entry
entries.append(entry)
entries.sort(key=lambda entry: entry["offset"].value)
for entry in entries:
size = entry["size"].value
padding = self.seekByte(entry["offset"].value)
if padding:
yield padding
maxsize = (self.size-self.current_size)//8
if maxsize < size:
self.warning("Truncate content of %s to %s bytes (was %s)" % (entry.path, maxsize, size))
size = maxsize
if not size:
continue
if entry["type"].value == 1:
yield Properties(self, "properties", entry, "Properties", size=size*8)
elif entry["type"].value == 128:
yield GlyphNames(self, "glyph_names", entry, "Glyph names", size=size*8)
else:
yield RawBytes(self, "data[]", size, "Content of %s" % entry.path)
def createFields(self):
yield String(self,
"signature",
4,
"AVI header (RIFF)",
charset="ASCII")
yield filesizeHandler(UInt32(self, "filesize", "File size"))
yield String(self,
"type",
4,
"Content type (\"AVI \", \"WAVE\", ...)",
charset="ASCII")
# Choose chunk type depending on file type
try:
chunk_cls = self.VALID_TYPES[self["type"].value][0]
except KeyError:
chunk_cls = Chunk
# Parse all chunks up to filesize
while self.current_size < self["filesize"].value * 8 + 8:
yield chunk_cls(self, "chunk[]")
if not self.eof:
yield RawBytes(self, "padding[]",
(self.size - self.current_size) / 8)
def createFields(self):
yield String(self,
"signature",
4,
'Format signature (".snd")',
charset="ASCII")
yield UInt32(self, "data_ofs", "Data offset")
yield filesizeHandler(UInt32(self, "data_size", "Data size"))
yield Enum(UInt32(self, "codec", "Audio codec"), self.CODEC_NAME)
yield displayHandler(
UInt32(self, "sample_rate", "Number of samples/second"),
humanFrequency)
yield UInt32(self, "channels", "Number of interleaved channels")
size = self["data_ofs"].value - self.current_size // 8
if 0 < size:
yield String(self,
"info",
size,
"Information",
strip=" \0",
charset="ISO-8859-1")
size = min(self["data_size"].value,
(self.size - self.current_size) // 8)
yield RawBytes(self, "audio_data", size, "Audio data")
def __init__(self, parent, name):
RawBytes.__init__(self, parent, name, PAGE_SIZE)
