Fixes #65, fixes #60, merges #64

dejavu.py

@@ -1,5 +1,6 @@
 #!/usr/bin/python
 
+import os
 import sys
 import json
 import warnings
@@ -12,15 +13,15 @@ from argparse import RawTextHelpFormatter
 
 warnings.filterwarnings("ignore")
 
-DEFAULT_CONFIG_FILE = "dejavu.cnf"
+DEFAULT_CONFIG_FILE = "dejavu.cnf.SAMPLE"
 
 
-def init(config_file):
+def init(configpath):
-    """ Load config from a JSON file
+    """ 
-    or anything outputting a python dictionary
+    Load config from a JSON file
     """
     try:
-        with open(config_file) as f:
+        with open(configpath) as f:
             config = json.load(f)
     except IOError as err:
         print("Cannot open configuration: %s. Exiting" % (str(err)))
@@ -31,15 +32,13 @@ def init(config_file):
 
 
 if __name__ == '__main__':
-    """ If running from terminal.
-    """
     parser = argparse.ArgumentParser(
-        description="Audio Fingerprinting library",
+        description="Dejavu: Audio Fingerprinting library",
         formatter_class=RawTextHelpFormatter)
     parser.add_argument('-c', '--config', nargs='?',
                         help='Path to configuration file\n'
                              'Usages: \n'
-                             '--config /path/to/congfile\n')
+                             '--config /path/to/config-file\n')
     parser.add_argument('-f', '--fingerprint', nargs='*',
                         help='Fingerprint files in a directory\n'
                              'Usages: \n'
@@ -54,7 +53,7 @@ if __name__ == '__main__':
     args = parser.parse_args()
 
     if not args.fingerprint and not args.recognize:
-        print("No arguments")
+        parser.print_help()
         sys.exit(0)
 
     config_file = args.config
@@ -65,15 +64,18 @@ if __name__ == '__main__':
     djv = init(config_file)
     if args.fingerprint:
         # Fingerprint all files in a directory
-        if 2 == len(args.fingerprint):
+        if len(args.fingerprint) == 2:
             directory = args.fingerprint[0]
             extension = args.fingerprint[1]
             print("Fingerprinting all .%s files in the %s directory"
                   % (extension, directory))
             djv.fingerprint_directory(directory, ["." + extension], 4)
 
-        elif 1 == len(args.fingerprint):
+        elif len(args.fingerprint) == 1:
             filepath = args.fingerprint[0]
+            if os.path.isdir(filepath):
+                print("Please specify an extension if you'd like to fingerprint a directory!")
+                sys.exit(1)
             djv.fingerprint_file(filepath)
 
     elif args.recognize:

dejavu/fingerprint.py

@@ -136,26 +136,20 @@ def generate_hashes(peaks, fan_value=DEFAULT_FAN_VALUE):
        sha1_hash[0:20]    time_offset
     [(e05b341a9b77a51fd26, 32), ... ]
     """
-    fingerprinted = set()  # to avoid rehashing same pairs
-
     if PEAK_SORT:
         peaks.sort(key=itemgetter(1))
 
     for i in range(len(peaks)):
         for j in range(1, fan_value):
-            if (i + j) < len(peaks) and not (i, i + j) in fingerprinted:
+            if (i + j) < len(peaks):
+                
                 freq1 = peaks[i][IDX_FREQ_I]
                 freq2 = peaks[i + j][IDX_FREQ_I]
-
                 t1 = peaks[i][IDX_TIME_J]
                 t2 = peaks[i + j][IDX_TIME_J]
-
                 t_delta = t2 - t1
 
                 if t_delta >= MIN_HASH_TIME_DELTA and t_delta <= MAX_HASH_TIME_DELTA:
                     h = hashlib.sha1(
                         "%s|%s|%s" % (str(freq1), str(freq2), str(t_delta)))
                     yield (h.hexdigest()[0:FINGERPRINT_REDUCTION], t1)
-
-                # ensure we don't repeat hashing
-                fingerprinted.add((i, i + j))

example.py

@@ -16,12 +16,19 @@ djv.fingerprint_directory("mp3", [".mp3"])
 # Recognize audio from a file
 from dejavu.recognize import FileRecognizer
 song = djv.recognize(FileRecognizer, "mp3/Sean-Fournier--Falling-For-You.mp3")
+print "From file we recognized: %s\n" % song
 
-# Or recognize audio from your microphone for 10 seconds
+# Or recognize audio from your microphone for `secs` seconds
 from dejavu.recognize import MicrophoneRecognizer
-song = djv.recognize(MicrophoneRecognizer, seconds=2)
+secs = 5
+song = djv.recognize(MicrophoneRecognizer, seconds=secs)
+if song is None:
+	print "Nothing recognized -- did you play the song out loud so your mic could hear it? :)"
+else:
+	print "From mic with %d seconds we recognized: %s\n" % (secs, song)
 
 # Or use a recognizer without the shortcut, in anyway you would like
 from dejavu.recognize import FileRecognizer
 recognizer = FileRecognizer(djv)
 song = recognizer.recognize_file("mp3/Josh-Woodward--I-Want-To-Destroy-Something-Beautiful.mp3")
+print "No shortcut, we recognized: %s\n" % song