| 1 | #if 0 |
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| 2 | # ----------------------------------------------------------------------- |
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| 3 | # $Id: factory.py,v 1.20.2.1 2005/05/07 11:37:08 dischi Exp $ |
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| 4 | # ----------------------------------------------------------------------- |
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| 5 | # $Log: factory.py,v $ |
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| 6 | # Revision 1.20.2.1 2005/05/07 11:37:08 dischi |
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| 7 | # make sure all strings are unicode |
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| 8 | # |
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| 9 | # Revision 1.20 2004/05/29 12:30:36 dischi |
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| 10 | # add function to correct data from the different mime modules |
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| 11 | # |
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| 12 | # Revision 1.19 2004/05/28 19:32:31 dischi |
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| 13 | # remove old stuff |
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| 14 | # |
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| 15 | # Revision 1.18 2004/05/17 19:10:57 dischi |
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| 16 | # better DEBUG handling |
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| 17 | # |
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| 18 | # Revision 1.17 2004/05/02 08:28:20 dischi |
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| 19 | # dvd iso support |
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| 20 | # |
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| 21 | # Revision 1.16 2004/02/03 20:41:18 dischi |
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| 22 | # add directory support |
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| 23 | # |
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| 24 | # Revision 1.15 2004/01/31 12:25:20 dischi |
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| 25 | # better ext checking |
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| 26 | # |
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| 27 | # Revision 1.13 2003/09/22 16:24:58 the_krow |
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| 28 | # o added flac |
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| 29 | # o try-except block around ioctl since it is not avaiable in all OS |
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| 30 | # |
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| 31 | # Revision 1.12 2003/09/14 13:50:42 dischi |
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| 32 | # make it possible to scan extention based only |
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| 33 | # |
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| 34 | # Revision 1.11 2003/09/01 19:23:23 dischi |
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| 35 | # ignore case when searching the correct extention |
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| 36 | # |
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| 37 | # Revision 1.10 2003/08/30 12:16:24 dischi |
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| 38 | # special handling for directories |
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| 39 | # |
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| 40 | # Revision 1.8 2003/08/26 18:01:26 outlyer |
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| 41 | # Patch from Lars Eggert for FreeBSD support |
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| 42 | # |
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| 43 | # Revision 1.4 2003/07/04 15:34:45 outlyer |
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| 44 | # Allow 'cdda' as well as 'cd' since we get that sometimes, and make sure |
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| 45 | # we import urllib. |
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| 46 | # |
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| 47 | # Revision 1.3 2003/07/02 09:32:16 the_krow |
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| 48 | # More Keys |
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| 49 | # import traceback was missing in factory |
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| 50 | # |
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| 51 | # Revision 1.1 2003/06/30 13:17:18 the_krow |
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| 52 | # o Refactored mediainfo into factory, synchronizedobject |
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| 53 | # o Parsers now register directly at mmpython not at mmpython.mediainfo |
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| 54 | # o use mmpython.Factory() instead of mmpython.mediainfo.get_singleton() |
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| 55 | # o Bugfix in PNG parser |
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| 56 | # o Renamed disc.AudioInfo into disc.AudioDiscInfo |
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| 57 | # o Renamed disc.DataInfo into disc.DataDiscInfo |
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| 58 | # |
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| 59 | # ----------------------------------------------------------------------- |
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| 60 | # MMPython - Media Metadata for Python |
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| 61 | # Copyright (C) 2003 Thomas Schueppel, Dirk Meyer |
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| 62 | # |
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| 63 | # This program is free software; you can redistribute it and/or modify |
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| 64 | # it under the terms of the GNU General Public License as published by |
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| 65 | # the Free Software Foundation; either version 2 of the License, or |
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| 66 | # (at your option) any later version. |
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| 67 | # |
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| 68 | # This program is distributed in the hope that it will be useful, but |
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| 69 | # WITHOUT ANY WARRANTY; without even the implied warranty of MER- |
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| 70 | # CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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| 71 | # Public License for more details. |
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| 72 | # |
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| 73 | # You should have received a copy of the GNU General Public License along |
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| 74 | # with this program; if not, write to the Free Software Foundation, Inc., |
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| 75 | # 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 76 | # |
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| 77 | # ----------------------------------------------------------------------- |
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| 78 | #endif |
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| 79 | |
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| 80 | import mediainfo |
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| 81 | import stat |
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| 82 | import os |
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| 83 | import urlparse |
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| 84 | import traceback |
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| 85 | import urllib |
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| 86 | |
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| 87 | DEBUG = 0 |
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| 88 | |
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| 89 | try: |
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| 90 | DEBUG = int(os.environ['MMPYTHON_DEBUG']) |
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| 91 | except: |
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| 92 | pass |
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| 93 | |
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| 94 | |
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| 95 | |
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| 96 | def isurl(url): |
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| 97 | return url.find('://') > 0 |
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| 98 | |
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| 99 | class Factory: |
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| 100 | """ |
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| 101 | Abstract Factory for the creation of MediaInfo instances. The different Methods |
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| 102 | create MediaInfo objects by parsing the given medium. |
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| 103 | """ |
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| 104 | def __init__(self): |
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| 105 | self.extmap = {} |
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| 106 | self.mimemap = {} |
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| 107 | self.types = [] |
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| 108 | self.device_types = [] |
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| 109 | self.directory_types = [] |
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| 110 | self.stream_types = [] |
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| 111 | |
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| 112 | def create_from_file(self, file, ext_only=0): |
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| 113 | """ |
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| 114 | create based on the file stream 'file |
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| 115 | """ |
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| 116 | # Check extension as a hint |
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| 117 | for e in self.extmap.keys(): |
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| 118 | if DEBUG > 1: print "trying ext %s" % e |
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| 119 | if file.name.lower().endswith(e.lower()): |
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| 120 | if DEBUG == 1: print "trying ext %s" % e |
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| 121 | try: |
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| 122 | file.seek(0,0) |
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| 123 | t = self.extmap[e][3](file) |
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| 124 | if t.valid: return t |
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| 125 | except: |
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| 126 | if DEBUG: |
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| 127 | traceback.print_exc() |
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| 128 | |
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| 129 | # no searching on all types |
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| 130 | if ext_only: |
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| 131 | return None |
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| 132 | |
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| 133 | if DEBUG: |
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| 134 | print "No Type found by Extension. Trying all" |
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| 135 | |
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| 136 | for e in self.types: |
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| 137 | if DEBUG: print "Trying %s" % e[0] |
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| 138 | try: |
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| 139 | file.seek(0,0) |
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| 140 | t = e[3](file) |
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| 141 | if t.valid: |
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| 142 | if DEBUG: print 'found' |
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| 143 | return t |
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| 144 | except: |
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| 145 | if DEBUG: |
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| 146 | traceback.print_exc() |
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| 147 | if DEBUG: print 'not found' |
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| 148 | return None |
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| 149 | |
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| 150 | |
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| 151 | def create_from_url(self,url): |
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| 152 | """ |
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| 153 | Create information for urls. This includes file:// and cd:// |
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| 154 | """ |
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| 155 | split = urlparse.urlsplit(url) |
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| 156 | scheme = split[0] |
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| 157 | |
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| 158 | if scheme == 'file': |
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| 159 | (scheme, location, path, query, fragment) = split |
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| 160 | return self.create_from_filename(location+path) |
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| 161 | |
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| 162 | elif scheme == 'cdda': |
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| 163 | r = self.create_from_filename(split[4]) |
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| 164 | if r: |
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| 165 | r.url = url |
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| 166 | return r |
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| 167 | |
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| 168 | elif scheme == 'http': |
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| 169 | # Quick Hack for webradio support |
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| 170 | # We will need some more soffisticated and generic construction |
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| 171 | # method for this. Perhaps move file.open stuff into __init__ |
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| 172 | # instead of doing it here... |
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| 173 | for e in self.stream_types: |
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| 174 | if DEBUG: print 'Trying %s' % e[0] |
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| 175 | t = e[3](url) |
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| 176 | if t.valid: |
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| 177 | t.url = url |
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| 178 | return t |
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| 179 | |
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| 180 | else: |
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| 181 | (scheme, location, path, query, fragment) = split |
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| 182 | uhandle = urllib.urlopen(url) |
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| 183 | mime = uhandle.info().gettype() |
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| 184 | print "Trying %s" % mime |
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| 185 | if self.mimemap.has_key(mime): |
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| 186 | t = self.mimemap[mime][3](file) |
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| 187 | if t.valid: return t |
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| 188 | # XXX Todo: Try other types |
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| 189 | pass |
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| 190 | |
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| 191 | |
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| 192 | def create_from_filename(self, filename, ext_only=0): |
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| 193 | """ |
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| 194 | Create information for the given filename |
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| 195 | """ |
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| 196 | if os.path.isdir(filename): |
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| 197 | return None |
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| 198 | if os.path.isfile(filename): |
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| 199 | try: |
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| 200 | f = open(filename,'rb') |
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| 201 | except IOError: |
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| 202 | print 'IOError reading %s' % filename |
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| 203 | return None |
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| 204 | r = self.create_from_file(f, ext_only) |
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| 205 | f.close() |
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| 206 | if r: |
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| 207 | r.correct_data() |
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| 208 | r.url = 'file://%s' % os.path.abspath(filename) |
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| 209 | return r |
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| 210 | return None |
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| 211 | |
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| 212 | |
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| 213 | def create_from_device(self,devicename): |
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| 214 | """ |
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| 215 | Create information from the device. Currently only rom drives |
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| 216 | are supported. |
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| 217 | """ |
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| 218 | for e in self.device_types: |
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| 219 | if DEBUG: print 'Trying %s' % e[0] |
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| 220 | t = e[3](devicename) |
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| 221 | if t.valid: |
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| 222 | t.url = 'file://%s' % os.path.abspath(devicename) |
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| 223 | return t |
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| 224 | return None |
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| 225 | |
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| 226 | |
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| 227 | def create_from_directory(self, dirname): |
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| 228 | """ |
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| 229 | Create information from the directory. |
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| 230 | """ |
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| 231 | for e in self.directory_types: |
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| 232 | if DEBUG: print 'Trying %s' % e[0] |
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| 233 | t = e[3](dirname) |
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| 234 | if t.valid: |
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| 235 | return t |
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| 236 | return None |
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| 237 | |
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| 238 | |
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| 239 | def create(self, name, ext_only=0): |
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| 240 | """ |
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| 241 | Global 'create' function. This function calls the different |
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| 242 | 'create_from_'-functions. |
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| 243 | """ |
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| 244 | try: |
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| 245 | if isurl(name): |
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| 246 | return self.create_from_url(name) |
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| 247 | if not os.path.exists(name): |
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| 248 | return None |
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| 249 | try: |
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| 250 | if (os.uname()[0] == 'FreeBSD' and \ |
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| 251 | stat.S_ISCHR(os.stat(name)[stat.ST_MODE])) \ |
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| 252 | or stat.S_ISBLK(os.stat(name)[stat.ST_MODE]): |
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| 253 | return self.create_from_device(name) |
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| 254 | except AttributeError: |
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| 255 | pass |
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| 256 | if os.path.isdir(name): |
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| 257 | return self.create_from_directory(name) |
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| 258 | return self.create_from_filename(name, ext_only) |
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| 259 | except: |
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| 260 | print 'mmpython.create error:' |
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| 261 | traceback.print_exc() |
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| 262 | print |
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| 263 | print 'Please report this bug to the Freevo mailing list' |
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| 264 | return None |
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| 265 | |
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| 266 | |
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| 267 | |
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| 268 | def register(self,mimetype,extensions,type,c): |
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| 269 | """ |
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| 270 | register the parser to mmpython |
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| 271 | """ |
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| 272 | if DEBUG > 0: |
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| 273 | print "%s registered" % mimetype |
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| 274 | tuple = (mimetype,extensions,type,c) |
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| 275 | |
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| 276 | if extensions == mediainfo.EXTENSION_DEVICE: |
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| 277 | self.device_types.append(tuple) |
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| 278 | elif extensions == mediainfo.EXTENSION_DIRECTORY: |
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| 279 | self.directory_types.append(tuple) |
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| 280 | elif extensions == mediainfo.EXTENSION_STREAM: |
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| 281 | self.stream_types.append(tuple) |
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| 282 | else: |
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| 283 | self.types.append(tuple) |
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| 284 | for e in extensions: |
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| 285 | self.extmap[e] = tuple |
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| 286 | self.mimemap[mimetype] = tuple |
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| 287 | |
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| 288 | |
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| 289 | def get(self, mimetype, extensions): |
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| 290 | """ |
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| 291 | return the object for mimetype/extensions or None |
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| 292 | """ |
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| 293 | if extensions == mediainfo.EXTENSION_DEVICE: |
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| 294 | l = self.device_types |
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| 295 | elif extensions == mediainfo.EXTENSION_DIRECTORY: |
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| 296 | l = self.directory_types |
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| 297 | elif extensions == mediainfo.EXTENSION_STREAM: |
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| 298 | l = self.stream_types |
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| 299 | else: |
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| 300 | l = self.types |
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| 301 | |
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| 302 | for info in l: |
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| 303 | if info[0] == mimetype and info[1] == extensions: |
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| 304 | return info[3] |
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| 305 | |
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| 306 | return None |
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