big change to amplitude fct

cleaned_sp.py

@@ -30,7 +30,7 @@ def retrieve_dominant_freqs(song_name, offset, songlen, segsize):
     maxfreq = 440*6
     
     # cutting the song to only keep the one we're interested in
-    subprocess.run(["ffmpeg", "-ss", str(offset), "-t", str(songlen+offset), "-i", song_name, "crop.wav"], shell=False) 
+    subprocess.run(["ffmpeg", "-ss", str(offset), "-t", str(songlen), "-i", song_name, "crop.wav"], shell=False) 
     subprocess.run(["clear"])
 
     # extracting data from cropped song
@@ -206,13 +206,14 @@ def void_freq_clean(song_name, offset, songlen, segsize, minfreq, maxfreq, ampth
     res = np.array(res)
     wavfile.write(output_name, sample_rate, res)
 
-def retrieve_dominant_amps(song_name, offset, songlen, segsize, percent):
+def retrieve_dominant_amps(song_name, offset, songlen, segsize, percent, divlen):
     # returns a list with the percent% peak amplitudes alongside the sample rate
     # /!\ song_name is specified to be a list, NOT a list of couples (aka song is mono)
     # segsize is in seconds
+    # divlen is in seconds
     
     # cutting the song to only keep the one we're interested in
-    subprocess.run(["ffmpeg", "-ss", str(offset), "-t", str(songlen+offset), "-i", song_name, "crop.wav"], shell=False) 
+    subprocess.run(["ffmpeg", "-ss", str(offset), "-t", str(songlen), "-i", song_name, "crop.wav"], shell=False) 
     subprocess.run(["clear"])
 
     # extracting data from cropped song
@@ -238,12 +239,24 @@ def retrieve_dominant_amps(song_name, offset, songlen, segsize, percent):
     is_locked = [False for i in range(len(song_data))]
     x = int((len(song_data)*percent)//100)
 
+    # length of segments
+    seglen = int(divlen*sample_rate)
+
+    # current offset
+    curptr = 0
+
     print("Retreiving the", int(x), "/", len(song_data), "highest values")
-    elements = heapq.nlargest(int(x), enumerate(song_data), key=lambda x: x[1])
+    while(curptr < len(song_data)):
+        left = curptr
+        right = min(len(song_data), curptr+seglen)
+
         #returns a list of couples [id, value]
+        elements = heapq.nlargest(int(x), enumerate(song_data[left:right]), key=lambda x: x[1])
 
         for idx in range(len(elements)):
-        is_locked[elements[idx][0]] = True
+            is_locked[elements[idx][0]+left] = True
+
+        curptr += seglen
 
     for r in range(len(song_data)):
         if(is_locked[r] == False):
@@ -290,7 +303,7 @@ def convert_to_wav(song_name:str, output_file="audio.wav") -> str:
             return output_file
     return song_name
 
-def retrieve_all_from_song(filename, t0, t1, dta=0.001, dtf=0.01, threshold=0.1, show=True):
+def retrieve_all_from_song(filename, t0, t1, bpm, dta=0.001, dtf=0.01, threshold=0.06, show=True):
     # dt = sample interval
     # threshold is in percent
 
@@ -301,20 +314,14 @@ def retrieve_all_from_song(filename, t0, t1, dta=0.001, dtf=0.01, threshold=0.1,
     # converts format to .wav
     new_fn = convert_to_wav(filename)
 
-    # crop the song to the part that will be mapped
-    subprocess.run(["ffmpeg", "-ss", str(t0), "-t", str(t1), "-i", new_fn, "crop0.wav"], shell=False) 
-    subprocess.run(["clear"])
-
-    sample_rate, _ = wavfile.read("crop0.wav")
-
     print("Filtering song...")
     #void_freq_clean(new_fn, t0, t1-t0, dt, 200, 2500, 0.05, "crop1.wav")
 
     print("Now retrieving the frequencies")
-    (maxlist, maxamps) = retrieve_dominant_freqs(new_fn, t0, t1-t0, dtf)
+    (maxlist, maxamps) = retrieve_dominant_freqs(new_fn, t0, t1, dtf)
     
     print("Now retrieving the amplitudes")
-    amps = retrieve_dominant_amps(new_fn, t0, t1-t0, dta, threshold)
+    amps = retrieve_dominant_amps(new_fn, t0, t1, dta, threshold, 4/(bpm/60))
 
     print("Len of freqs : ", len(maxlist), "|", len(maxamps))
     print("Len of amps : ", len(maxlist), "|", len(amps))
@@ -336,11 +343,9 @@ def retrieve_all_from_song(filename, t0, t1, dta=0.001, dtf=0.01, threshold=0.1,
         plt.show()
 
     # free()
-    subprocess.run(["rm", "crop0.wav"], shell=False)
 
-retrieve_all_from_song("tetris_4.wav", 0, 5, dtf=0.375/2)
+retrieve_all_from_song("ctype.mp3", 0, 5, 149.3, dtf=1/(149.3/60)/8)
 print("yipee")
-print(1/(160/60));