Libraries for Subliminal

2011-12-23 16:02:48 +01:00
parent a03c33c1c3
commit 8efc88e691
109 changed files with 26894 additions and 0 deletions
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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+#
+# GuessIt - A library for guessing information from filenames
+# Copyright (c) 2011 Nicolas Wack <wackou@gmail.com>
+#
+# GuessIt is free software; you can redistribute it and/or modify it under
+# the terms of the Lesser GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# GuessIt 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
+# Lesser GNU General Public License for more details.
+#
+# You should have received a copy of the Lesser GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+__version__ = '0.2'
+__all__ = [ 'Guess', 'Language',
+            'guess_file_info', 'guess_video_info',
+            'guess_movie_info', 'guess_episode_info' ]
+
+
+from guessit.guess import Guess, merge_all
+from guessit.language import Language
+from guessit.matcher import IterativeMatcher
+import logging
+
+log = logging.getLogger("guessit")
+
+class NullHandler(logging.Handler):
+    def emit(self, record):
+        pass
+
+# let's be a nicely behaving library
+h = NullHandler()
+log.addHandler(h)
+
+
+
+
+def guess_file_info(filename, filetype, info = [ 'filename' ]):
+    """info can contain the names of the various plugins, such as 'filename' to
+    detect filename info, or 'hash_md5' to get the md5 hash of the file.
+
+    >>> guess_file_info('test/dummy.srt', 'autodetect', info = ['hash_md5', 'hash_sha1'])
+    {'hash_md5': 'e781de9b94ba2753a8e2945b2c0a123d', 'hash_sha1': 'bfd18e2f4e5d59775c2bc14d80f56971891ed620'}
+    """
+    result = []
+    hashers = []
+
+    for infotype in info:
+        if infotype == 'filename':
+            m = IterativeMatcher(filename, filetype = filetype)
+            result.append(m.matched())
+
+        elif infotype == 'hash_mpc':
+            import hash_mpc
+            try:
+                result.append(Guess({ 'hash_mpc': hash_mpc.hash_file(filename) },
+                                    confidence = 1.0))
+            except Exception, e:
+                log.warning('Could not compute MPC-style hash because: %s' % e)
+
+        elif infotype == 'hash_ed2k':
+            import hash_ed2k
+            try:
+                result.append(Guess({ 'hash_ed2k': hash_ed2k.hash_file(filename) },
+                                    confidence = 1.0))
+            except Exception, e:
+                log.warning('Could not compute ed2k hash because: %s' % e)
+
+        elif infotype.startswith('hash_'):
+            import hashlib
+            hashname = infotype[5:]
+            try:
+                hasher = getattr(hashlib, hashname)()
+                hashers.append((infotype, hasher))
+            except AttributeError:
+                log.warning('Could not compute %s hash because it is not available from python\'s hashlib module' % hashname)
+
+        else:
+            log.warning('Invalid infotype: %s' % infotype)
+
+
+        """For plugins which depend on some optional library, import them like that:
+
+        if infotype == 'plugin_name':
+            try:
+                import optional_lib
+            except ImportError:
+                raise Exception, 'The plugin module cannot be loaded because the optional_lib lib is missing'
+
+        # do some stuff
+        """
+
+    # do all the hashes now, but on a single pass
+    if hashers:
+        try:
+            blocksize = 8192
+            hasherobjs = dict(hashers).values()
+
+            with open(filename, 'rb') as f:
+                for chunk in iter(lambda: f.read(blocksize), ''):
+                    for hasher in hasherobjs:
+                        hasher.update(chunk)
+
+            for infotype, hasher in hashers:
+                result.append(Guess({ infotype: hasher.hexdigest() },
+                                    confidence = 1.0))
+        except Exception, e:
+            log.warning('Could not compute hash because: %s' % e)
+
+
+    return merge_all(result)
+
+
+def guess_video_info(filename, info = [ 'filename' ]):
+    return guess_file_info(filename, 'autodetect', info)
+
+def guess_movie_info(filename, info = [ 'filename' ]):
+    return guess_file_info(filename, 'movie', info)
+
+def guess_episode_info(filename, info = [ 'filename' ]):
+    return guess_file_info(filename, 'episode', info)
+
+