## Copyright (C) 2002-2003 Dmitry Borisov
##
## This library is free software; you can redistribute it and/or
## modify it under the terms of the GNU Library General Public
## License as published by the Free Software Foundation; either
## version 2 of the License, or (at your option) any later version.
##
## This library is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## Library General Public License for more details.
##
## You should have received a copy of the GNU Library General Public
## License along with this library; if not, write to the Free
## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##
# Get all modules under current module
import os, glob, string, traceback
codecs= []
class NeedBufferException( Exception ):
pass
def loadCodecs():
"""
loadCodecs() -> Initially load codecs upon module start. Do not use after the module is loaded.
"""
dir, file= os.path.split( __file__ )
modules= glob.glob( os.path.join( dir, '*.*' ))
probed= { '__init__': 1 }
for module in modules:
dir, file= os.path.split( module )
name= string.split( file, '.' )[ 0 ]
if name.endswith( '_d' ):
name= name[ : len( name )- 2 ]
if not probed.has_key( name ):
m= __import__( '%s' % name, globals() )
try:
# See if codec can work on this platform
m.probe()
codecs.append( m )
except:
pass
#traceback.print_exc()
probed[ name ]= 1
def findCodec( params ):
"""
findCodec( params ) -> codec, returns codec that closely matches params passed.
Params are the same as taken form codec.getParam().
"""
id= params[ 'id' ]
for codec in codecs:
if codec.id== id:
return codec
raise 'No codec with id %d exists' % id
def Decoder( params ):
"""
Decoder( params )-> codec, creates Decoder out of the set of params. Look through all registered
ext_codecs and chooses the closest one. Raises an exception when no
codecs are found.
"""
c= findCodec( params )
return c.Decoder( params )
def Encoder( params ):
"""
Encoder( params )-> codec, creates Encoder out of the set of params. Look through all registered
ext_codecs and chooses the closest one. Raises an exception when no
codecs are found.
"""
c= findCodec( params )
return c.Encoder( params )
loadCodecs()
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