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# Copyright (c) 2006 Carnegie Mellon University
#
# You may copy and modify this freely under the same terms as
# Sphinx-III
"""Read/write Sphinx-III LDA/MLLT/covariance files.
This module reads and writes the linear transformation files used by
Sphinx-III.
"""
__author__ = "David Huggins-Daines <dhdaines@gmail.com>"
__version__ = "$Revision$"
from .s3file import S3File, S3File_write
class S3LDAFile(S3File):
"Read Sphinx-III format LDA files"
def __init__(self, file, mode="rb"):
S3File.__init__(self, file, mode)
self._params = self._load()
def readgauheader(self):
if self.fileattr["version"] != "0.1":
raise Exception("Version mismatch: must be 0.1 but is " +
self.fileattr["version"])
def _load(self):
self.readgauheader()
self.fh.seek(self.data_start, 0)
return self.read3d()
class S3LDAFile_write(S3File_write):
"Write Sphinx-III format LDA files"
def __init__(self, filename=None, mode="wb", attr={"version": 0.1}):
S3File_write.__init__(self, filename, mode, attr)
def writeall(self, stuff):
self.write3d(stuff)
def open(filename, mode="rb"):
if mode in ("r", "rb"):
return S3LDAFile(filename)
elif mode in ("w", "wb"):
return S3LDAFile_write(filename)
else:
raise Exception("mode must be 'r', 'rb', 'w', or 'wb'")
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