import alsaaudio
import socket

# Network
UDP_PORT = 5005
sock     = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.bind(("0.0.0.0", UDP_PORT))

# Audio
RATE      = 48000
CHANNELS  = 1
CHUNKSIZE = 960

out = alsaaudio.PCM(
    alsaaudio.PCM_PLAYBACK,
    alsaaudio.PCM_NORMAL,
    channels=CHANNELS,
    rate=RATE,
    format=alsaaudio.PCM_FORMAT_S16_LE,
    periodsize=CHUNKSIZE,   # must match sender
    device='default'
)

print("Receiving...")

SILENCE = b'\x00' * (CHUNKSIZE * 2)  # 1920 bytes of silence
sock.settimeout(0.05)                 # 50ms timeout

try:
    while True:
        try:
            data, addr = sock.recvfrom(4096)
            out.write(data)              # play the 960 samples
        except socket.timeout:
            out.write(SILENCE)           # packet lost → play silence

except KeyboardInterrupt:
    sock.close()
    print("Stopped")