mirror of
https://github.com/DJ2LS/FreeDATA
synced 2024-05-14 08:04:33 +00:00
254 lines
8.4 KiB
Python
Executable file
254 lines
8.4 KiB
Python
Executable file
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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Receive-side station emulator for test frame tests over a high quality audio channel
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using a physical sound card or STDIO.
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Legacy test for sending / receiving connection test frames through the codec2 and
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back through on the other station. Data injection initiates directly through
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the codec2 API. Tests all three codec2 data frames simultaneously.
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Invoked from CMake, test_highsnr_stdio_P_P_multi.py, and many test_virtual[1-3]*.sh.
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@author: DJ2LS
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"""
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import argparse
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import ctypes
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import sys
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import time
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from typing import List
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import numpy as np
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import pyaudio
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sys.path.insert(0, "..")
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from modem import codec2
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def test_mm_rx():
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# AUDIO PARAMETERS
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AUDIO_FRAMES_PER_BUFFER = 2400 * 2
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MODEM_SAMPLE_RATE = codec2.api.FREEDV_FS_8000
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AUDIO_SAMPLE_RATE_RX = 48000
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# make sure our resampler will work
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assert (AUDIO_SAMPLE_RATE_RX / MODEM_SAMPLE_RATE) == codec2.api.FDMDV_OS_48
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# SET COUNTERS
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rx_bursts_datac = [0, 0, 0]
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rx_frames_datac = [0, 0, 0]
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rx_total_frames_datac = [0, 0, 0]
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# time meassurement
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time_end_datac = [0.0, 0.0, 0.0]
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time_needed_datac = [0.0, 0.0, 0.0]
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time_start_datac = [0.0, 0.0, 0.0]
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datac_buffer: List[codec2.audio_buffer] = []
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datac_bytes_out: List[ctypes.Array] = []
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datac_bytes_per_frame = []
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datac_freedv: List[ctypes.c_void_p] = []
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args = parse_arguments()
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if args.LIST:
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p_audio = pyaudio.PyAudio()
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for dev in range(p_audio.get_device_count()):
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print("audiodev: ", dev, p_audio.get_device_info_by_index(dev)["name"])
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sys.exit()
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N_BURSTS = args.N_BURSTS
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N_FRAMES_PER_BURST = args.N_FRAMES_PER_BURST
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AUDIO_INPUT_DEVICE = args.AUDIO_INPUT_DEVICE
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DEBUGGING_MODE = args.DEBUGGING_MODE
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MAX_TIME = args.TIMEOUT
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# open codec2 instances
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for idx in range(3):
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datac_freedv.append(
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ctypes.cast(
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codec2.api.freedv_open(codec2.FREEDV_MODE.datac13.value), ctypes.c_void_p
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)
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)
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datac_bytes_per_frame.append(
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int(codec2.api.freedv_get_bits_per_modem_frame(datac_freedv[idx]) / 8)
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)
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datac_bytes_out.append(ctypes.create_string_buffer(datac_bytes_per_frame[idx]))
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codec2.api.freedv_set_frames_per_burst(datac_freedv[idx], N_FRAMES_PER_BURST)
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datac_buffer.append(codec2.audio_buffer(2 * AUDIO_FRAMES_PER_BUFFER))
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resampler = codec2.resampler()
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# check if we want to use an audio device then do a pyaudio init
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if AUDIO_INPUT_DEVICE != -1:
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p_audio = pyaudio.PyAudio()
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# auto search for loopback devices
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if AUDIO_INPUT_DEVICE == -2:
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loopback_list = [
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dev
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for dev in range(p_audio.get_device_count())
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if "Loopback: PCM" in p_audio.get_device_info_by_index(dev)["name"]
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]
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if len(loopback_list) >= 2:
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AUDIO_INPUT_DEVICE = loopback_list[0] # 0 = RX 1 = TX
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print(f"loopback_list rx: {loopback_list}", file=sys.stderr)
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else:
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sys.exit()
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print(
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f"AUDIO INPUT DEVICE: {AUDIO_INPUT_DEVICE} "
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f"DEVICE: {p_audio.get_device_info_by_index(AUDIO_INPUT_DEVICE)['name']} "
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f"AUDIO SAMPLE RATE: {AUDIO_SAMPLE_RATE_RX}",
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file=sys.stderr,
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)
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stream_rx = p_audio.open(
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format=pyaudio.paInt16,
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channels=1,
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rate=AUDIO_SAMPLE_RATE_RX,
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frames_per_buffer=AUDIO_FRAMES_PER_BUFFER,
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input=True,
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input_device_index=AUDIO_INPUT_DEVICE,
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)
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timeout = time.time() + MAX_TIME
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print(time.time(), MAX_TIME, timeout)
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receive = True
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nread_exceptions = 0
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# initial nin values
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datac_nin = [0, 0, 0]
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for idx in range(3):
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datac_nin[idx] = codec2.api.freedv_nin(datac_freedv[idx])
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def print_stats(time_datac13, time_datac1, time_datac3):
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if not DEBUGGING_MODE:
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return
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time_datac = [time_datac13, time_datac1, time_datac3]
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datac_rxstatus = ["", "", ""]
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for idx in range(3):
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datac_rxstatus[idx] = codec2.api.rx_sync_flags_to_text[
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codec2.api.freedv_get_rx_status(datac_freedv[idx])
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]
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text_out = ""
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for idx in range(3):
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text_out += f"NIN{idx}: {datac_nin[idx]:5d} "
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text_out += f"RX_STATUS{idx}: {datac_rxstatus[idx]:4s} "
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text_out += f"TIME: {round(time_datac[idx], 4):.4f} | "
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text_out = text_out.rstrip(" ").rstrip("|").rstrip(" ")
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print(text_out, file=sys.stderr)
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while receive and time.time() < timeout:
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if AUDIO_INPUT_DEVICE != -1:
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try:
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data_in48k = stream_rx.read(
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AUDIO_FRAMES_PER_BUFFER, exception_on_overflow=True
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)
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except OSError as err:
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print(err, file=sys.stderr)
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if "Input overflowed" in str(err):
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nread_exceptions += 1
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if "Stream closed" in str(err):
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print("Ending....")
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receive = False
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else:
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data_in48k = sys.stdin.buffer.read(AUDIO_FRAMES_PER_BUFFER * 2)
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# insert samples in buffer
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audio_buffer = np.frombuffer(data_in48k, dtype=np.int16)
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if len(audio_buffer) != AUDIO_FRAMES_PER_BUFFER:
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print("len(x)", len(audio_buffer))
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receive = False
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audio_buffer = resampler.resample48_to_8(audio_buffer)
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for idx in range(3):
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datac_buffer[idx].push(audio_buffer)
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while datac_buffer[idx].nbuffer >= datac_nin[idx]:
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# demodulate audio
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time_start_datac[idx] = time.time()
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nbytes = codec2.api.freedv_rawdatarx(
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datac_freedv[idx],
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datac_bytes_out[idx],
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datac_buffer[idx].buffer.ctypes,
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)
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time_end_datac[idx] = time.time()
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datac_buffer[idx].pop(datac_nin[idx])
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datac_nin[idx] = codec2.api.freedv_nin(datac_freedv[idx])
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if nbytes == datac_bytes_per_frame[idx]:
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rx_total_frames_datac[idx] += 1
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rx_frames_datac[idx] += 1
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if rx_frames_datac[idx] == N_FRAMES_PER_BURST:
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rx_frames_datac[idx] = 0
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rx_bursts_datac[idx] += 1
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time_needed_datac[idx] = time_end_datac[idx] - time_start_datac[idx]
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print_stats(
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time_needed_datac[0], time_needed_datac[1], time_needed_datac[2]
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)
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if (
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rx_bursts_datac[0] == N_BURSTS
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and rx_bursts_datac[1] == N_BURSTS
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and rx_bursts_datac[2] == N_BURSTS
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):
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receive = False
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if nread_exceptions:
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print(
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f"nread_exceptions {nread_exceptions:d} - receive audio lost! "
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"Consider increasing Pyaudio frames_per_buffer...",
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file=sys.stderr,
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)
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# INFO IF WE REACHED TIMEOUT
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if time.time() > timeout:
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print("TIMEOUT REACHED", file=sys.stderr)
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print(
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f"DATAC13: {rx_bursts_datac[0]}/{rx_total_frames_datac[0]} "
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f"DATAC1: {rx_bursts_datac[1]}/{rx_total_frames_datac[1]} "
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f"DATAC3: {rx_bursts_datac[2]}/{rx_total_frames_datac[2]}",
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file=sys.stderr,
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)
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if AUDIO_INPUT_DEVICE != -1:
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stream_rx.close()
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p_audio.terminate()
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def parse_arguments():
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# --------------------------------------------GET PARAMETER INPUTS
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parser = argparse.ArgumentParser(description="Simons TEST TNC")
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parser.add_argument("--bursts", dest="N_BURSTS", default=1, type=int)
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parser.add_argument(
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"--framesperburst", dest="N_FRAMES_PER_BURST", default=1, type=int
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)
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parser.add_argument(
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"--audiodev",
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dest="AUDIO_INPUT_DEVICE",
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default=-1,
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type=int,
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help="audio device number to use",
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)
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parser.add_argument("--debug", dest="DEBUGGING_MODE", action="store_true")
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parser.add_argument(
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"--list",
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dest="LIST",
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action="store_true",
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help="list audio devices by number and exit",
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)
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parser.add_argument(
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"--timeout",
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dest="TIMEOUT",
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default=60,
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type=int,
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help="Timeout (seconds) before test ends",
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)
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args, _ = parser.parse_known_args()
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return args
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if __name__ == "__main__":
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test_mm_rx()
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