FreeDATA/test/test_rx.py
dj2ls ea133f054d moved simple test from pyaudio to sounddevice
thisis just a test as I'm not happy with the overall way we are dong tests. This has been great during first steps with the tnc ( virtual audio devices ) but now we should to a more reliable way with named pipes for example
2022-04-30 12:27:14 +02:00

206 lines
6.8 KiB
Python

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Wed Dec 23 07:04:24 2020
@author: DJ2LS
"""
import ctypes
from ctypes import *
import pathlib
import sounddevice as sd
import sys
import logging
import time
import threading
import sys
import argparse
import numpy as np
sys.path.insert(0,'..')
from tnc import codec2
#--------------------------------------------GET PARAMETER INPUTS
parser = argparse.ArgumentParser(description='Simons TEST TNC')
parser.add_argument('--bursts', dest="N_BURSTS", default=1, type=int)
parser.add_argument('--framesperburst', dest="N_FRAMES_PER_BURST", default=1, type=int)
parser.add_argument('--mode', dest="FREEDV_MODE", type=str, choices=['datac0', 'datac1', 'datac3'])
parser.add_argument('--audiodev', dest="AUDIO_INPUT_DEVICE", default=-1, type=int,
help="audio device number to use, use -2 to automatically select a loopback device")
parser.add_argument('--debug', dest="DEBUGGING_MODE", action="store_true")
parser.add_argument('--timeout', dest="TIMEOUT", default=10, type=int, help="Timeout (seconds) before test ends")
parser.add_argument('--list', dest="LIST", action="store_true", help="list audio devices by number and exit")
args = parser.parse_args()
if args.LIST:
devices = sd.query_devices(device=None, kind=None)
index = 0
for device in devices:
print(f"{index} {device['name']}")
index += 1
sd._terminate()
quit()
N_BURSTS = args.N_BURSTS
N_FRAMES_PER_BURST = args.N_FRAMES_PER_BURST
AUDIO_INPUT_DEVICE = args.AUDIO_INPUT_DEVICE
MODE = codec2.FREEDV_MODE[args.FREEDV_MODE].value
DEBUGGING_MODE = args.DEBUGGING_MODE
TIMEOUT = args.TIMEOUT
# AUDIO PARAMETERS
AUDIO_FRAMES_PER_BUFFER = 2400*2 # <- consider increasing if you get nread_exceptions > 0
MODEM_SAMPLE_RATE = codec2.api.FREEDV_FS_8000
AUDIO_SAMPLE_RATE_RX = 48000
# make sure our resampler will work
assert (AUDIO_SAMPLE_RATE_RX / MODEM_SAMPLE_RATE) == codec2.api.FDMDV_OS_48
# check if we want to use an audio device then do an pyaudio init
if AUDIO_INPUT_DEVICE != -1:
# auto search for loopback devices
if AUDIO_INPUT_DEVICE == -2:
loopback_list = []
devices = sd.query_devices(device=None, kind=None)
index = 0
for device in devices:
if 'Loopback: PCM' in device['name']:
print(index)
loopback_list.append(index)
index += 1
if len(loopback_list) >= 1:
AUDIO_INPUT_DEVICE = loopback_list[0] #0 = RX 1 = TX
print(f"loopback_list tx: {loopback_list}", file=sys.stderr)
else:
print("not enough audio loopback devices ready...")
print("you should wait about 30 seconds...")
sd._terminate()
quit()
print(f"AUDIO INPUT DEVICE: {AUDIO_INPUT_DEVICE}", file=sys.stderr)
# audio stream init
stream_rx = sd.RawStream(channels=1, dtype='int16', device=AUDIO_INPUT_DEVICE, samplerate = AUDIO_SAMPLE_RATE_RX, blocksize=4800)
stream_rx.start()
# ----------------------------------------------------------------
# DATA CHANNEL INITIALISATION
# open codec2 instance
freedv = cast(codec2.api.freedv_open(MODE), c_void_p)
# get number of bytes per frame for mode
bytes_per_frame = int(codec2.api.freedv_get_bits_per_modem_frame(freedv)/8)
payload_bytes_per_frame = bytes_per_frame -2
n_max_modem_samples = codec2.api.freedv_get_n_max_modem_samples(freedv)
bytes_out = create_string_buffer(bytes_per_frame)
codec2.api.freedv_set_frames_per_burst(freedv,N_FRAMES_PER_BURST)
total_n_bytes = 0
rx_total_frames = 0
rx_frames = 0
rx_bursts = 0
rx_errors = 0
nread_exceptions = 0
timeout = time.time() + TIMEOUT
receive = True
audio_buffer = codec2.audio_buffer(AUDIO_FRAMES_PER_BUFFER*2)
resampler = codec2.resampler()
# time meassurement
time_start = 0
time_end = 0
# Copy received 48 kHz to a file. Listen to this file with:
# aplay -r 48000 -f S16_LE rx48.raw
# Corruption of this file is a good way to detect audio card issues
frx = open("rx48.raw", mode='wb')
# initial number of samples we need
nin = codec2.api.freedv_nin(freedv)
while receive and time.time() < timeout:
if AUDIO_INPUT_DEVICE != -1:
try:
#data_in48k = stream_rx.read(AUDIO_FRAMES_PER_BUFFER, exception_on_overflow = True)
data_in48k, overflowed = stream_rx.read(AUDIO_FRAMES_PER_BUFFER)
except OSError as err:
print(err, file=sys.stderr)
#if str(err).find("Input overflowed") != -1:
# nread_exceptions += 1
#if str(err).find("Stream closed") != -1:
# print("Ending...")
# receive = False
else:
data_in48k = sys.stdin.buffer.read(AUDIO_FRAMES_PER_BUFFER*2)
# insert samples in buffer
x = np.frombuffer(data_in48k, dtype=np.int16)
#print(x)
#x = data_in48k
x.tofile(frx)
if len(x) != AUDIO_FRAMES_PER_BUFFER:
receive = False
x = resampler.resample48_to_8(x)
audio_buffer.push(x)
# when we have enough samples call FreeDV Rx
while audio_buffer.nbuffer >= nin:
# start time measurement
time_start = time.time()
# demodulate audio
nbytes = codec2.api.freedv_rawdatarx(freedv, bytes_out, audio_buffer.buffer.ctypes)
time_end = time.time()
audio_buffer.pop(nin)
# call me on every loop!
nin = codec2.api.freedv_nin(freedv)
rx_status = codec2.api.freedv_get_rx_status(freedv)
if rx_status & codec2.api.FREEDV_RX_BIT_ERRORS:
rx_errors = rx_errors + 1
if DEBUGGING_MODE:
rx_status = codec2.api.rx_sync_flags_to_text[rx_status]
time_needed = time_end - time_start
print("nin: %5d rx_status: %4s naudio_buffer: %4d time: %4s" % \
(nin,rx_status,audio_buffer.nbuffer, time_needed), file=sys.stderr)
if nbytes:
total_n_bytes = total_n_bytes + nbytes
if nbytes == bytes_per_frame:
rx_total_frames = rx_total_frames + 1
rx_frames = rx_frames + 1
if rx_frames == N_FRAMES_PER_BURST:
rx_frames = 0
rx_bursts = rx_bursts + 1
if rx_bursts == N_BURSTS:
receive = False
if time.time() >= timeout:
print("TIMEOUT REACHED")
if nread_exceptions:
print("nread_exceptions %d - receive audio lost! Consider increasing Pyaudio frames_per_buffer..." % \
nread_exceptions, file=sys.stderr)
print(f"RECEIVED BURSTS: {rx_bursts} RECEIVED FRAMES: {rx_total_frames} RX_ERRORS: {rx_errors}", file=sys.stderr)
frx.close()
# and at last check if we had an opened audio instance and close it
if AUDIO_INPUT_DEVICE != -1:
sd._terminate()