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https://github.com/correl/dejavu.git
synced 2024-12-28 19:19:18 +00:00
Rewrote multiprocessing parts to only require one database connection
List of changes in detail: - fingerprint_directory: Now uses mp.Pool.imap and updates database in callers process. - fingerprint_file: Now uses _fingerprint_worker internally. - _fingerprint_worker: Some slight changes to argument handling due to `imap` usage. Changed to return (song_name, hashes) where hashes is a set of hashes from all channels. - path_to_songname: Changed to use `os.path.splitext`, this caused files with a period in their name to return the wrong name.
This commit is contained in:
Wessie
parent
cd7adc1485
commit
64a6161b90
2 changed files with 52 additions and 43 deletions
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@ -16,8 +16,8 @@ class Dejavu(object):
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self.db = db_cls(**config.get("database", {}))
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self.db.setup()
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# if we should limit seconds fingerprinted,
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# if we should limit seconds fingerprinted,
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# None|-1 means use entire track
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self.limit = self.config.get("fingerprint_limit", None)
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if self.limit == -1: # for JSON compatibility
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@ -43,7 +43,7 @@ class Dejavu(object):
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pool = multiprocessing.Pool(nprocesses)
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results = []
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filenames_to_fingerprint = []
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for filename, _ in decoder.find_files(path, extensions):
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# don't refingerprint already fingerprinted files
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@ -51,39 +51,46 @@ class Dejavu(object):
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print "%s already fingerprinted, continuing..." % filename
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continue
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result = pool.apply_async(_fingerprint_worker,
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(filename, self.db, self.limit))
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results.append(result)
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filenames_to_fingerprint.append(filename)
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while len(results):
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for result in results[:]:
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# TODO: Handle errors gracefully and return them to the callee
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# in some way.
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try:
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result.get(timeout=2)
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except multiprocessing.TimeoutError:
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continue
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except:
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import traceback, sys
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traceback.print_exc(file=sys.stdout)
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results.remove(result)
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else:
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results.remove(result)
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# Prepare _fingerprint_worker input
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worker_input = zip(filenames_to_fingerprint,
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[self.limit] * len(filenames_to_fingerprint))
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# Send off our tasks
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iterator = pool.imap_unordered(_fingerprint_worker,
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worker_input)
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# Loop till we have all of them
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while True:
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try:
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song_name, hashes = iterator.next()
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except multiprocessing.TimeoutError:
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continue
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except StopIteration:
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break
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except:
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print("Failed fingerprinting")
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# Print traceback because we can't reraise it here
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import traceback, sys
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traceback.print_exc(file=sys.stdout)
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else:
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sid = self.db.insert_song(song_name)
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self.db.insert_hashes(sid, hashes)
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pool.close()
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pool.join()
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def fingerprint_file(self, filepath, song_name=None):
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channels, Fs = decoder.read(filepath)
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song_name, hashes = _fingerprint_worker(filepath,
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self.limit,
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song_name=song_name)
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if not song_name:
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print "Song name: %s" % song_name
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song_name = decoder.path_to_songname(filepath)
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song_id = self.db.insert_song(song_name)
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sid = self.db.insert_song(song_name)
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for data in channels:
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hashes = fingerprint.fingerprint(data, Fs=Fs)
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self.db.insert_hashes(song_id, hashes)
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self.db.insert_hashes(sid, hashes)
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def find_matches(self, samples, Fs=fingerprint.DEFAULT_FS):
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hashes = fingerprint.fingerprint(samples, Fs=Fs)
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@ -130,7 +137,7 @@ class Dejavu(object):
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"song_id": song_id,
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"song_name": songname,
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"confidence": largest_count,
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"offset" : largest
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"offset": largest
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}
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return song
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@ -140,13 +147,21 @@ class Dejavu(object):
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return r.recognize(*options, **kwoptions)
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def _fingerprint_worker(filename, db, limit):
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song_name, extension = os.path.splitext(os.path.basename(filename))
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def _fingerprint_worker(filename, limit=None, song_name=None):
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# Pool.imap sends arguments as tuples so we have to unpack
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# them ourself.
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try:
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filename, limit = filename
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except ValueError:
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pass
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songname, extension = os.path.splitext(os.path.basename(filename))
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song_name = song_name or songname
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channels, Fs = decoder.read(filename, limit)
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# insert song into database
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sid = db.insert_song(song_name)
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result = set()
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channel_amount = len(channels)
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for channeln, channel in enumerate(channels):
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@ -158,15 +173,9 @@ def _fingerprint_worker(filename, db, limit):
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print("Finished channel %d/%d for %s" % (channeln + 1, channel_amount,
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filename))
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print("Inserting fingerprints for channel %d/%d for %s" %
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(channeln + 1, channel_amount, filename))
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db.insert_hashes(sid, hashes)
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print("Finished inserting for channel %d/%d for %s" %
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(channeln + 1, channel_amount, filename))
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result |= set(hashes)
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print("Marking %s finished" % (filename,))
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db.set_song_fingerprinted(sid)
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print("%s finished" % (filename,))
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return song_name, result
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def chunkify(lst, n):
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@ -43,6 +43,6 @@ def read(filename, limit=None):
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def path_to_songname(path):
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"""
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Extracts song name from a filepath. Used to identify which songs
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have already been fingerprinted on disk.
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have already been fingerprinted on disk.
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"""
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return os.path.basename(path).split(".")[0]
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return os.path.splitext(os.path.basename(path))[0]
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