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midi_recording.py
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midi_recording.py
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import ast
import json
#import RPi.GPIO as GPIO
import asyncio
import websockets
import ssl
import pathlib
import time
import requests
import pygame
import pygame.midi
import board
import neopixel
from midiutil import MIDIFile
from keys_led_pairs import piano_key_mapping
ID = "12345678"
auto_id = ""
token = ""
headers = ""
midi_input = ""
midi_notes = []
notes_in_progress = []
connected = False
recording = False
start_time = 0
server_url = "wss://10.136.168.150:8000/ws"
http_url = "https://10.136.168.150:8000/api/authorize"
RED = (255, 0 ,0)
GREEN = (0, 255 ,0)
YELLOW = (150, 120 ,0)
OFF = (0, 0 ,0)
ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
ssl_context.load_verify_locations("keys/cert.pem")
ssl_context.load_default_certs(ssl.Purpose.CLIENT_AUTH)
ssl_context.check_hostname = False # Disable hostname verification
pixels = neopixel.NeoPixel(board.D18, 176, brightness=0.6)
#########################################################################################################
# Initialize units
def setup():
global midi_input, pixels
# initializing the midi module
pygame.init()
pygame.midi.init()
# checking to see if midi devices connected
while True:
# will wait until user connects the module to the keyboard
device_count = pygame.midi.get_count()
if device_count != 0:
print("MIDI device found.")
break
midi_input = pygame.midi.Input(3) #the midi input device
# initializing the neopixel
pixels[5] = (0,0,255)
time.sleep(1)
pixels.fill((0,0,0))
# note turns off after other off signal comes --- need to fix this
#########################################################################################################
# Handles the turning on and off of the LEDs
def led_handler(key, state):
# when key is pressed
if state == 144:
print( pixels[piano_key_mapping[key - 20][0]])
if pixels[piano_key_mapping[key - 20][0]] != [0, 0, 0]:
for i in range(len(piano_key_mapping[key - 20])):
pixels[piano_key_mapping[key - 20][i]] = GREEN
elif pixels[piano_key_mapping[key - 20][0]] == [0, 0, 0]:
for i in range(len(piano_key_mapping[key - 20])):
pixels[piano_key_mapping[key - 20][i]] = YELLOW
# when key released
elif state == 128:
for i in range(len(piano_key_mapping[key - 20])):
pixels[piano_key_mapping[key - 20][i]] = OFF
#########################################################################################################
# Handles the turning on and off of the LEDs
def led_handler2(key, state):
# when key is pressed
if state == 144:
if pixels[piano_key_mapping[key - 20][0]] != [0, 0, 0]:
for i in range(len(piano_key_mapping[key - 20])):
pixels[piano_key_mapping[key - 20][i]] = GREEN
elif pixels[piano_key_mapping[key - 20][0]] == [0, 0, 0]:
for i in range(len(piano_key_mapping[key - 20])):
pixels[piano_key_mapping[key - 20][i]] = RED
# when key released
elif state == 128:
for i in range(len(piano_key_mapping[key - 20])):
pixels[piano_key_mapping[key - 20][i]] = OFF
#########################################################################################################
def generate_midi_file():
track = 0
channel = 0
time = 0 # In beats
tempo = 60 # In BPM
volume = 100 # 0-127, as per the MIDI standard
MyMIDI = MIDIFile(1) # One track, defaults to format 1 (tempo track automatically created)
MyMIDI.addTempo(track,time, tempo)
for i, (pitch, note_time, duration) in enumerate(midi_notes):
MyMIDI.addNote(track, channel, pitch, note_time, duration, volume)
with open("my_midi.mid", "wb") as output_file:
MyMIDI.writeFile(output_file)
# send midi file to the server
file = {'midi_file': open('my_midi.mid', 'rb')}
response = requests.post(http_url, files=file)
if response.status_code == 200:
print("MIDI file sent successfully!")
else:
print("Failed to send MIDI file. Status code:", response.status_code)
#########################################################################################################
# Function to handle the received WebSocket message
async def receive_messages(websocket):
global auto_id, token, recording
try:
while True:
raw_message = await websocket.recv()
if raw_message:
message = json.loads(raw_message)
print(message)
if message["type"] == "note":
msg_array = ast.literal_eval(message.get("note"))
for note in msg_array:
state = note[0][0]
key = note[0][1]
led_handler(int(key), int(state))
elif message["type"] == "jwt":
token = message["jwt"]
elif message["type"] == "rec":
recording = message["rec"]
if message["rec"] == "start":
recording == True
start_time = time.time()
if recording == "stop":
recording == False
start_time == 0
generate_midi_file()
await asyncio.sleep(0.05) # Add a small delay to avoid busy-wait
except websockets.ConnectionClosed as e:
# Handle a closed connection
print("Connection closed:", e)
#########################################################################################################
# Verification to authorize websocket connection
def verification():
global token, headers
# Sending HTTP request to authorize websocket connection
message = {'hardwareId': ID}
response = requests.get(http_url, params = message, verify=False)
# if not verified
if response.status_code != 200:
print("No authorization")
return False
else:
# if verified, save token and establish websocket connection
print("Websocket connection authorized")
json_object_returned = response.json()
token = json_object_returned.get("token")
headers = [('Authorization', 'Bearer ' + token)]
print("Got the token: ", token)##
return True
#########################################################################################################
async def main():
global midi_input, midi_notes, notes_in_progress, connected, headers, token
setup()
while True:
authorization = verification()
if authorization != True:
print("No authorization")
else:
async with websockets.connect(server_url, ssl=ssl_context, extra_headers = headers) as websocket:
print("Connected to Server")
# Create a task to receive messages
recv_task = asyncio.ensure_future(receive_messages(websocket))
while True:
# check if midi device still connected
device_count = pygame.midi.get_count()
if device_count == 0:
print("MIDI device not found.")
continue
#listen to midi port for new events
midi_event = midi_input.read(20)
# if midi_input.poll(): ----- see this
# print(midi_event) ##
# send that message back
if len(midi_event) != 0:
message = {"token": token, "note": str(midi_event)}
await websocket.send(json.dumps(message))
# lighting up the led on my end
msg_array = ast.literal_eval(message.get("note"))
for note in msg_array:
state = note[0][0]
key = note[0][1]
led_handler2(int(key), int(state))
if recording == "true":
if state == 144:
# note pressed
# save time and key
notes_in_progress.append((int(key), note[1] - start_time))
elif state == 128:
# note release
# save duration
for i, (note, time) in enumerate(notes_in_progress):
if note == int(key):
duration = time - note[1]
midi_notes.append((int(key), note[1], duration))
await asyncio.sleep(0.05)
if websocket.closed:
print ("Websocket connection closed. Trying to reconnect ...")
pixels.fill((0,0,0))
break
await asyncio.sleep(0.01) # Add a small delay before reconnecting
pixels.fill((0,0,0))
if __name__ == "__main__":
asyncio.get_event_loop().run_until_complete(main())