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### jack_CDTime - various converters between data representation - part of
### jack - extract audio from a CD and MP3ify it using 3rd party software
### Copyright (C) 1999,2000 Arne Zellentin <arne@unix-ag.org>
### This program is free software; you can redistribute it and/or modify
### it under the terms of the GNU General Public License as published by
### the Free Software Foundation; either version 2 of the License, or
### (at your option) any later version.
### This program 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 General Public License for more details.
### You should have received a copy of the GNU General Public License
### along with this program; if not, write to the Free Software
### Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import string, types
CDDA_BLOCKS_PER_SECOND = 75
def strtoblocks(str):
"convert mm:ss:ff to blocks"
str = string.split(str, ":")
blocks = string.atoi(str[2])
blocks = blocks + string.atoi(str[1]) * CDDA_BLOCKS_PER_SECOND
blocks = blocks + string.atoi(str[0]) * 60 * CDDA_BLOCKS_PER_SECOND
return blocks
def blockstomsf(blocks):
"convert blocks to mm, ss, ff"
mm = blocks / 60 / CDDA_BLOCKS_PER_SECOND
blocks = blocks - mm * 60 * CDDA_BLOCKS_PER_SECOND
ss = blocks / CDDA_BLOCKS_PER_SECOND
ff = blocks % CDDA_BLOCKS_PER_SECOND
return mm, ss, ff, blocks
B_MM, B_SS, B_FF = 0, 1, 2
def msftostr(msf):
"convert msf format to readable string"
return "%02i" % msf[B_MM]+":"+"%02i" % msf[B_SS]+":"+"%02i" % msf[B_FF]
class CDTime:
def __init__(self, any = None):
self.__dict__['blocks'] = 0
self.__dict__['mm'] = 0
self.__dict__['ss'] = 0
self.__dict__['ff'] = 0
self.__dict__['string'] = "00:00:00"
if any:
self.any = any
def __str__(self):
return self.string
def __setattr__(self, name, value):
self.__dict__[name] = value
if name == 'string' or name == 'any':
new_val = self.__dict__[name]
if type(new_val) == types.StringType and len(new_val) >=2:
if new_val[0] == new_val[-1]:
if new_val[0] in ('"', "'"):
new_val = new_val[1:-1]
try:
blocks = string.atoi(new_val)
except:
if type(new_val) == types.StringType:
blocks = strtoblocks(new_val)
elif type(new_val) == types.IntType:
blocks = new_val
else:
raise ValueError
self.ff = blocks
elif name == 'blocks':
self.__dict__['mm'] = 0
self.__dict__['ss'] = 0
self.ff == self.blocks
elif name == 'ff':
if self.ff >= CDDA_BLOCKS_PER_SECOND:
self.ss = self.ss + self.ff / CDDA_BLOCKS_PER_SECOND
self.__dict__['ff'] = self.ff % CDDA_BLOCKS_PER_SECOND
elif name == 'ss':
if self.ss >= 60:
self.mm = self.mm + self.ss / 60
self.__dict__['ss'] = self.ss % 60
self.__dict__['string'] = msftostr((self.mm, self.ss, self.ff,))
self.__dict__['blocks'] = strtoblocks(self.string)
self.__dict__['any'] = None
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