added changes on checking similarity

base/api/check_similarity.py

@@ -0,0 +1,30 @@
+import librosa
+import librosa.display as display
+import math
+
+def cosine_similarity1(v1,v2):
+    "compute cosine similarity of v1 to v2: (v1 dot v2)/{||v1||*||v2||)"
+    sumxx, sumxy, sumyy = 0, 0, 0
+    for i in range(len(v1)):
+        x = v1[i]; y = v2[i]
+        sumxx += x*x
+        sumyy += y*y
+        sumxy += x*y
+    return sumxy/math.sqrt(sumxx*sumyy)
+  
+def check_similarity(audio_path, audio_path2):
+    # load audio files
+    y1, sr1 = librosa.load(audio_path)
+    y2, sr2 = librosa.load(audio_path2)
+    # compute spectrogram for the audio files
+    S1 = librosa.stft(y1)
+    S2 = librosa.stft(y2)
+    # convert to power spectrogram
+    S_db = librosa.amplitude_to_db(abs(S1))
+    S2_db = librosa.amplitude_to_db(abs(S2))
+    # display spectrogram
+    # display.specshow(S_db, y_axis='linear', x_axis='time', sr=sr, hop_length=512)
+    # display.specshow(S2_db, y_axis='linear', x_axis='time', sr=sr2, hop_length=512)
+    # plt.show()
+    # compute cosine similarity
+    return cosine_similarity1(S_db.flatten(), S2_db.flatten())