def verify(self, progress=None):
"""verifies the current file for correctness
returns True if the file is okay
raises an InvalidFile with an error message if there is
some problem with the file"""
# Checking for a truncated Ogg stream typically involves
# verifying that the "end of stream" flag is set on the last
# Ogg page in the stream in the event that one or more whole
# pages is lost. But since the OpusFile decoder doesn't perform
# this check and doesn't provide any access to its internal
# Ogg decoder (unlike Vorbis), we'll perform that check externally.
#
# And since it's a fast check, we won't bother to update progress.
from audiotools.ogg import PageReader
import os.path
try:
reader = PageReader(open(self.filename, "rb"))
except IOError as err:
raise InvalidOpus(str(err))
try:
page = reader.read()
while (not page.stream_end):
page = reader.read()
reader.close()
except (IOError, ValueError) as err:
raise InvalidOpus(str(err))
return AudioFile.verify(self, progress)
def verify(self, progress=None):
"""verifies the current file for correctness
returns True if the file is okay
raises an InvalidFile with an error message if there is
some problem with the file"""
# Checking for a truncated Ogg stream typically involves
# verifying that the "end of stream" flag is set on the last
# Ogg page in the stream in the event that one or more whole
# pages is lost. But since the OpusFile decoder doesn't perform
# this check and doesn't provide any access to its internal
# Ogg decoder (unlike Vorbis), we'll perform that check externally.
#
# And since it's a fast check, we won't bother to update progress.
from audiotools.ogg import PageReader
import os.path
try:
reader = PageReader(open(self.filename, "rb"))
except IOError as err:
raise InvalidOpus(str(err))
try:
page = reader.read()
while (not page.stream_end):
page = reader.read()
reader.close()
except (IOError, ValueError) as err:
raise InvalidOpus(str(err))
return AudioFile.verify(self, progress)
def total_frames(self):
"""returns the total PCM frames of the track as an integer"""
from audiotools._ogg import PageReader
try:
reader = PageReader(file(self.filename, "rb"))
page = reader.read()
pcm_samples = page.granule_position
while (not page.stream_end):
page = reader.read()
pcm_samples = max(pcm_samples, page.granule_position)
reader.close()
return pcm_samples
except (IOError, ValueError):
return 0