def createFields(self):
yield UInt8(self, "tag")
yield UInt24(self, "size", "Content size")
yield UInt24(self, "timestamp", "Timestamp in millisecond")
yield NullBytes(self, "reserved", 4)
size = self["size"].value
if size:
if self.parser:
for field in self.parser(self, size):
yield field
else:
yield RawBytes(self, "content", size)
def createFields(self):
yield UInt16(self, "min_block_size",
"The minimum block size (in samples) used in the stream")
yield UInt16(self, "max_block_size",
"The maximum block size (in samples) used in the stream")
yield UInt24(self, "min_frame_size",
"The minimum frame size (in bytes) used in the stream")
yield UInt24(self, "max_frame_size",
"The maximum frame size (in bytes) used in the stream")
yield Bits(self, "sample_hertz", 20, "Sample rate in Hertz")
yield Bits(self, "nb_channel", 3, "Number of channels minus one")
yield Bits(self, "bits_per_sample", 5, "Bits per sample minus one")
yield Bits(self, "total_samples", 36, "Total samples in stream")
yield RawBytes(self, "md5sum", 16,
"MD5 signature of the unencoded audio data")
def createFields(self):
# Header
yield GUID(self, "name")
yield UInt16(self, "integrity_check")
yield Enum(UInt8(self, "type"), EFI_FV_FILETYPE)
yield UInt8(self, "attributes")
yield UInt24(self, "size")
yield UInt8(self, "state")
# Content
while not self.eof:
yield FileSection(self, "section[]")
def parseTheoraHeader(parent):
yield UInt8(parent, "version_major")
yield UInt8(parent, "version_minor")
yield UInt8(parent, "version_revision")
yield UInt16(parent, "width", "Width*16 in pixel")
yield UInt16(parent, "height", "Height*16 in pixel")
yield UInt24(parent, "frame_width")
yield UInt24(parent, "frame_height")
yield UInt8(parent, "offset_x")
yield UInt8(parent, "offset_y")
yield UInt32(parent, "fps_num", "Frame per second numerator")
yield UInt32(parent, "fps_den", "Frame per second denominator")
yield UInt24(parent, "aspect_ratio_num", "Aspect ratio numerator")
yield UInt24(parent, "aspect_ratio_den", "Aspect ratio denominator")
yield UInt8(parent, "color_space")
yield UInt24(parent, "target_bitrate")
yield Bits(parent, "quality", 6)
yield Bits(parent, "gp_shift", 5)
yield Enum(Bits(parent, "pixel_format", 2), PIXEL_FORMATS)
yield Bits(parent, "spare_config", 3)
def createFields(self):
if 3 <= self["../ver_major"].value:
# ID3 v2.3 and 2.4
yield Enum(
String(self, "tag", 4, "Tag", charset="ASCII", strip="\0"),
ID3_Chunk.tag23_name)
if 4 <= self["../ver_major"].value:
yield ID3_Size(self, "size") # ID3 v2.4
else:
yield UInt32(self, "size") # ID3 v2.3
yield Bit(self, "tag_alter", "Tag alter preservation")
yield Bit(self, "file_alter", "Tag alter preservation")
yield Bit(self, "rd_only", "Read only?")
yield NullBits(self, "padding[]", 5)
yield Bit(self, "compressed", "Frame is compressed?")
yield Bit(self, "encrypted", "Frame is encrypted?")
yield Bit(self, "group", "Grouping identity")
yield NullBits(self, "padding[]", 5)
size = self["size"].value
is_compressed = self["compressed"].value
else:
# ID3 v2.2
yield Enum(
String(self, "tag", 3, "Tag", charset="ASCII", strip="\0"),
ID3_Chunk.tag22_name)
yield UInt24(self, "size")
size = self["size"].value - self.current_size / 8 + 6
is_compressed = False
if size:
cls = None
if not (is_compressed):
tag = self["tag"].value
if tag in ID3_Chunk.handler:
cls = ID3_Chunk.handler[tag]
elif tag[0] == "T":
cls = ID3_StringCharset
if cls:
yield cls(self, "content", "Content", size=size * 8)
else:
yield RawBytes(self, "content", size, "Raw data content")
def createFields(self):
# Header
yield UInt24(self, "size")
yield Enum(UInt8(self, "type"), EFI_SECTION_TYPE)
section_type = self["type"].value
if section_type == EFI_SECTION_COMPRESSION:
yield UInt32(self, "uncomp_len")
yield Enum(UInt8(self, "comp_type"), self.COMPRESSION_TYPE)
elif section_type == EFI_SECTION_FREEFORM_SUBTYPE_GUID:
yield GUID(self, "sub_type_guid")
elif section_type == EFI_SECTION_GUID_DEFINED:
yield GUID(self, "section_definition_guid")
yield UInt16(self, "data_offset")
yield UInt16(self, "attributes")
elif section_type == EFI_SECTION_USER_INTERFACE:
yield CString(self, "file_name", charset="UTF-16-LE")
elif section_type == EFI_SECTION_VERSION:
yield UInt16(self, "build_number")
yield CString(self, "version", charset="UTF-16-LE")
# Content
content_size = (self.size - self.current_size) // 8
if content_size == 0:
return
if section_type == EFI_SECTION_COMPRESSION:
compression_type = self["comp_type"].value
if compression_type == 1:
while not self.eof:
yield RawBytes(self, "compressed_content", content_size)
else:
while not self.eof:
yield FileSection(self, "section[]")
elif section_type == EFI_SECTION_FIRMWARE_VOLUME_IMAGE:
yield FirmwareVolume(self, "firmware_volume")
else:
yield RawBytes(
self, "content", content_size,
EFI_SECTION_TYPE.get(self["type"].value,
"Unknown Section Type"))
def createFields(self):
yield Bit(self, "last_metadata_block",
"True if this is the last metadata block")
yield Enum(Bits(self, "block_type", 7, "Metadata block header type"),
self.BLOCK_TYPE_DESC)
yield UInt24(
self, "metadata_length",
"Length of following metadata in bytes (doesn't include this header)"
)
block_type = self["block_type"].value
size = self["metadata_length"].value
if not size:
return
try:
handler = self.BLOCK_TYPES[block_type][2]
except KeyError:
handler = None
if handler:
yield handler(self, "content", size=size * 8)
elif self["block_type"].value == 1:
yield NullBytes(self, "padding", size)
else:
yield RawBytes(self, "rawdata", size)
def parseTempo(parser, size):
yield textHandler(UInt24(parser, "microsec_quarter", "Microseconds per quarter note"), formatTempo)