#!/usr/bin/env python

# -*- coding: utf-8 -*-

import time, collections, RPi.GPIO as GPIO, os, sys

from omxplayer import OMXPlayer

if os.path.exists("/home/pi/SMIKE/Smike.pid"):

sys.exit(0)

else:

open("/home/pi/SMIKE/Smike.pid", "w").close()

ReedBeatPin = 4

ReedBrakePin = 17

LEDPin = 18

SongDict = collections.OrderedDict()

def UpdateFrequency(channel):

logfile.write(str(ActualFrequency)+"; ")

def UpdateSong(SongId):

global Fading

Fading = True

def OnBrakeRising(channel):

#print("OFF")

def OnBrakeFalling(channel):

#print("OFF")

GPIO.setmode(GPIO.BCM)

GPIO.setwarnings(False)

GPIO.setup(ReedBeatPin, GPIO.IN, GPIO.PUD_DOWN)

GPIO.setup(ReedBrakePin, GPIO.IN, GPIO.PUD_DOWN)

GPIO.setup(LEDPin, GPIO.OUT)

GPIO.add_event_detect(ReedBeatPin, GPIO.RISING, callback=UpdateFrequency)

GPIO.add_event_detect(ReedBrakePin, GPIO.FALLING, callback=OnBrakeFalling)

##Frequency

PeriodTime = 0

Time = time.time()

Frequency = 1

ActualFrequency = 1

##User Data

Tolerance = 10

MinSongTime = 10

MinSongTimeRatio = 20

PushFactor = 1.05

Bias = 0.2

BlendSpeed = 5

Volume = CurrentVolume = -1100

##Song Data

CurrentSong = 1

LastSongStart = Time

Fading = False

SongUpdated = False

##SongDict Import

import csv

reader = csv.reader(open('/home/pi/SMIKE/Playlist.csv', 'r'))

Header = []

is_Header = True

for row in reader:

if is_Header:

Header = row

is_Header = False

else:

SongDict[int(row[0])] = {}

for index in range(1, len(Header)):

if Header[index] == "BPM":

SongDict[int(row[0])][Header[index]] = int(row[index])

else:

SongDict[int(row[0])][Header[index]] = row[index]

Song = (SongDict[1]["Title"]+'.mp3')

player = OMXPlayer('/home/pi/Music/' + Song)

logfile = open("/home/pi/SMIKE/Log.txt", "w")

try:

#UpdateSong(1)

player.play()

player.set_volume(CurrentVolume)

##Tick

while True:

##Frequqncy Interpolation

Frequency += (ActualFrequency-Frequency)*0.025

Frequency = min(Frequency, 4000)

#print(Frequency)

##print(int(Frequency), MinSongTimeRatio * (Tolerance/abs(Frequency - SongDict[CurrentSong]["BPM"]))**0.066)

##Song Update

if Fading:

LastSongStart = time.time()

if not SongUpdated:

CurrentVolume = max(-3333, CurrentVolume - 100*BlendSpeed)

if CurrentVolume == -3333:

SongUpdated = True

else:

if CurrentVolume == -3333:

player.quit()

player = OMXPlayer('/home/pi/Music/' + (SongDict[CurrentSong]["Title"]+'.mp3'))

player.play()

CurrentVolume = min(Volume, CurrentVolume + 100*BlendSpeed)

if CurrentVolume == Volume:

SongUpdated = Fading = False

player.set_volume(CurrentVolume)

print(CurrentVolume, CurrentSong)

elif SongDict[CurrentSong]["BPM"] - Tolerance < Frequency < SongDict[CurrentSong]["BPM"] + Tolerance:

pass

else:

CurrentDelta = Frequency - SongDict[CurrentSong]["BPM"]

MinSongTime = MinSongTimeRatio * (Tolerance/abs(CurrentDelta))**0.1

if time.time() - LastSongStart > MinSongTime:

OldSong = CurrentSong

if CurrentDelta > 0:

while CurrentSong < len(SongDict) and abs(Frequency - SongDict[CurrentSong+1]["BPM"]) <= abs(Frequency - SongDict[CurrentSong]["BPM"])*PushFactor:

CurrentSong += 1

if OldSong != CurrentSong:

UpdateSong(CurrentSong)

elif CurrentDelta < 0 and CurrentSong != 1:

while CurrentSong > 1 and abs(Frequency - SongDict[CurrentSong-1]["BPM"])*PushFactor <= abs(Frequency - SongDict[CurrentSong]["BPM"]):

CurrentSong -= 1

if OldSong != CurrentSong:

UpdateSong(CurrentSong)

else:

pass

#print("w8 m8 1337: ", MinSongTime - (time.time() - LastSongStart), MinSongTime, CurrentDelta)

except KeyboardInterrupt:

player.quit()

logfile.close()

GPIO.output(LEDPin,GPIO.LOW)