[fix] Better bpm
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alban
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6ae754e893
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73f0765519
47
redilysis.py
47
redilysis.py
@ -38,8 +38,12 @@ _BPM_MIN=10
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_BPM_MAX=400
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# Argument parsing
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# Audio Args
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parser = argparse.ArgumentParser(prog='realtime_redis')
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# Standard Args
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parser.add_argument("-v","--verbose",action="store_true",help="Verbose")
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# Redis Args
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parser.add_argument("-i","--ip",help="IP address of the Redis server ",default="127.0.0.1",type=str)
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parser.add_argument("-p","--port",help="Port of the Redis server ",default="6379",type=str)
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# Audio Capture Args
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parser.add_argument('--list-devices','-L', action='store_true', help='Which devices are detected by pyaudio')
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parser.add_argument('--mode','-m', required=False, default='spectrum', choices=['spectrum', 'bpm'], type=str, help='Which mode to use. Default=spectrum')
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@ -47,16 +51,11 @@ parser.add_argument('--device','-d', required=False, type=int, help='Which pyaud
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parser.add_argument('--sampling-frequency','-s', required=False, default=0.1, type=float, help='Which frequency, in seconds. Default={}f '.format(_SAMPLING_FREQUENCY))
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parser.add_argument('--channels','-c', required=False, default=_CHANNELS, type=int, help='How many channels. Default={} '.format(_CHANNELS))
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parser.add_argument('--rate','-r', required=False, default=44100, type=int, help='The audio capture rate in Hz. Default={} '.format(_RATE))
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#parser.add_argument('--frames','-f', required=False, default=4410, type=int, help='How many frames per buffer. Default={}'.format(_FRAMES_PER_BUFFER))
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parser.add_argument('--frames','-f', required=False, default=4410, type=int, help='How many frames per buffer. Default={}'.format(_FRAMES_PER_BUFFER))
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# BPM Mode Args
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parser.add_argument('--bpm-min', required=False, default=_BPM_MIN, type=int, help='BPM mode only. The low BPM threshold. Default={} '.format(_BPM_MIN))
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parser.add_argument('--bpm-max', required=False, default=_BPM_MAX, type=int, help='BPM mode only. The high BPM threshold. Default={} '.format(_BPM_MAX))
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# Redis Args
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parser.add_argument("-i","--ip",help="IP address of the Redis server ",default="127.0.0.1",type=str)
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parser.add_argument("-p","--port",help="Port of the Redis server ",default="6379",type=str)
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# Standard Args
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parser.add_argument("-v","--verbose",action="store_true",help="Verbose")
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args = parser.parse_args()
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# global
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@ -110,7 +109,6 @@ if( LIST_DEVICES ):
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list_devices()
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os._exit(1)
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p = pyaudio.PyAudio()
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def m_bpm(audio_data):
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@ -122,7 +120,6 @@ def m_bpm(audio_data):
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global bpm
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global start
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bpm_delay = SAMPLING_FREQUENCY + start - time.time()
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# Detect tempo / bpm
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new_bpm, beats = librosa.beat.beat_track(
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@ -138,19 +135,25 @@ def m_bpm(audio_data):
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'''
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# Correct the eventual octave error
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if new_bpm < bpm_min or new_bpm > bpm_max:
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found = False
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octaveErrorList = [ 0.5, 2, 0.3333, 3 ]
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for key,factor in enumerate(octaveErrorList):
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correction = new_bpm * factor
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if correction > bpm_min and correction < bpm_max:
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debug( "Corrected bpm to:{}".format(correction))
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debug( "Corrected high/low bpm:{} to:{}".format(new_bpm, correction))
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new_bpm = correction
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found = True
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break
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if found == False:
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if new_bpm < bpm_min :
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new_bpm = bpm_min
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else :
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new_bpm = bpm_max
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debug("new_bpm:{}".format(new_bpm))
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'''
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How to guess the next beats based on the data sent to redis
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~~ A Dirty Graph ~~
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|start end|
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Capture |........................|
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@ -167,22 +170,29 @@ def m_bpm(audio_data):
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. passed (...b....b....b.)
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. guessed (..b....b....b....b...
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Next Beat Calculation b....b....b....b.|..b
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Beats |last beat
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0 1 2 3 4
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=> (Delay - last beat) + x*BPM/60 (with x >= read_delay/BPM/60)
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Redis:
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bpm_sample_interval
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|........................|
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bpm_delay
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|.........................|
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key bpm_sample_interval
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visual |........................|
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key bpm_delay
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visual |.........................|
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'''
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bpm = new_bpm
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bpm_sample_interval = SAMPLING_FREQUENCY * 1000
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bpm_delay = (SAMPLING_FREQUENCY + time.time() - start ) * 1000
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pexpireat = int( 2 * bpm_sample_interval);
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# Save to Redis
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r.set( 'bpm', new_bpm, px=( 2* int(SAMPLING_FREQUENCY * 1000)))
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r.set( 'bpm_sample_interval', SAMPLING_FREQUENCY )
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r.set( 'bpm', round(bpm,2), px = pexpireat )
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r.set( 'bpm_sample_interval', bpm_sample_interval )
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r.set( 'bpm_delay', bpm_delay )
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r.set( 'beats', json.dumps( beats.tolist() ) )
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debug( "bpm:{} bpm_delay:{} beats:{}".format(bpm,bpm_delay,beats) )
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#debug( "pexpireat:{}".format(pexpireat))
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debug( "bpm:{} bpm_delay:{} bpm_sample_interval:{} beats:{}".format(bpm,bpm_delay,bpm_sample_interval,beats) )
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return True
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def m_spectrum(audio_data):
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@ -250,6 +260,7 @@ if MODE == 'spectrum':
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elif MODE == 'bpm':
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debug("In this mode, we will set keys: onset, bpm, beats")
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p = pyaudio.PyAudio()
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stream = p.open(format=pyaudio.paFloat32,
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channels=CHANNELS,
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rate=RATE,
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