def useHeader(self, gzip):
self.compression = gzip["compression"].display
if gzip["mtime"]:
self.last_modification = gzip["mtime"].value
self.os = gzip["os"].display
if gzip["has_filename"].value:
self.filename = getValue(gzip, "filename")
if gzip["has_comment"].value:
self.comment = getValue(gzip, "comment")
self.compr_size = gzip["file"].size // 8
self.file_size = gzip["size"].value
def useStreamProp(self, stream, index):
meta = Metadata(self)
meta.comment = "Start: %s" % stream["stream_start"].value
if getValue(stream, "mime_type") == "logical-fileinfo":
for prop in stream.array("file_info/prop"):
self.useFileInfoProp(prop)
else:
meta.bit_rate = stream["avg_bit_rate"].value
meta.duration = timedelta(milliseconds=stream["duration"].value)
meta.mime_type = getValue(stream, "mime_type")
meta.title = getValue(stream, "desc")
self.addGroup("stream[%u]" % index, meta, "Stream #%u" % (1 + index))
def useAviHeader(self, header):
microsec = header["microsec_per_frame"].value
if microsec:
self.frame_rate = 1000000.0 / microsec
total_frame = getValue(header, "total_frame")
if total_frame and not self.has("duration"):
self.duration = timedelta(microseconds=total_frame * microsec)
self.width = header["width"].value
self.height = header["height"].value
def readVorbisComment(metadata, comment):
metadata.producer = getValue(comment, "vendor")
for item in comment.array("metadata"):
if "=" in item.value:
key, value = item.value.split("=", 1)
key = key.upper()
if key in VORBIS_KEY_TO_ATTR:
key = VORBIS_KEY_TO_ATTR[key]
setattr(metadata, key, value)
elif value:
metadata.warning("Skip Vorbis comment %s: %s" % (key, value))
def useCommon(self, info):
self.nb_channel = info["nb_channel"].value
self.bits_per_sample = info["sample_size"].value
self.sample_rate = getValue(info, "sample_rate")
if self.has("sample_rate"):
rate = self.get("sample_rate")
if rate:
sec = float(info["nb_sample"].value) / rate
self.duration = timedelta(seconds=sec)
if "codec" in info:
self.compression = info["codec"].display
def extractPE(self, exe):
# Read information from headers
if "pe_header" in exe:
self.usePE_Header(exe["pe_header"])
if "pe_opt_header" in exe:
self.usePE_OptHeader(exe["pe_opt_header"])
# Use PE resource
resource = exe.getResource()
if resource and "version_info/node[0]" in resource:
for node in resource.array("version_info/node[0]/node"):
if getValue(node, "name") == "StringFileInfo" \
and "node[0]" in node:
self.readVersionInfo(node["node[0]"])
def useRoot(self, real):
self.bits_per_sample = 16 # FIXME: Is that correct?
if real["version"].value != 3:
self.sample_rate = real["sample_rate"].value
self.nb_channel = real["channels"].value
else:
self.sample_rate = 8000
self.nb_channel = 1
fourcc = getValue(real, "FourCC")
if fourcc:
self.compression = fourcc
try:
self.bit_rate = self.FOURCC_TO_BITRATE[fourcc]
except LookupError:
pass
def extract(self, riff, **kwargs):
type = riff["type"].value
if type == "WAVE":
self.extractWAVE(riff)
size = getValue(riff, "audio_data/size")
if size:
computeAudioComprRate(self, size * 8)
elif type == "AVI ":
if "headers" in riff:
if 'scan_index' in kwargs:
self.extractAVI(riff["headers"],
scan_index=kwargs['scan_index'])
else:
self.extractAVI(riff["headers"])
self.extractInfo(riff["headers"])
elif type == "ACON":
self.extractAnim(riff)
if "info" in riff:
self.extractInfo(riff["info"])
def extract(self, real):
version = real["version"].value
if "metadata" in real:
self.useMetadata(real["metadata"])
self.useRoot(real)
self.format_version = "Real audio version %s" % version
if version == 3:
size = getValue(real, "data_size")
elif "filesize" in real and "headersize" in real:
size = (real["filesize"].value + 40) - \
(real["headersize"].value + 16)
else:
size = None
if size:
size *= 8
if self.has("bit_rate"):
sec = float(size) / self.get('bit_rate')
self.duration = timedelta(seconds=sec)
computeComprRate(self, size)