#!/usr/bin/env python3 # -*- coding: utf-8 -*- import argparse import ctypes import sys import time from typing import List import numpy as np import pyaudio sys.path.insert(0, "..") from tnc import codec2 def test_mm_rx(): # AUDIO PARAMETERS AUDIO_FRAMES_PER_BUFFER = 2400 * 2 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 # SET COUNTERS rx_bursts_datac = [0, 0, 0] rx_frames_datac = [0, 0, 0] rx_total_frames_datac = [0, 0, 0] # time meassurement time_end_datac = [0.0, 0.0, 0.0] time_needed_datac = [0.0, 0.0, 0.0] time_start_datac = [0.0, 0.0, 0.0] datac_buffer: List[codec2.audio_buffer] = [] datac_bytes_out: List[ctypes.Array] = [] datac_bytes_per_frame = [] datac_freedv: List[ctypes.c_void_p] = [] args = parse_arguments() if args.LIST: p_audio = pyaudio.PyAudio() for dev in range(p_audio.get_device_count()): print("audiodev: ", dev, p_audio.get_device_info_by_index(dev)["name"]) sys.exit() N_BURSTS = args.N_BURSTS N_FRAMES_PER_BURST = args.N_FRAMES_PER_BURST AUDIO_INPUT_DEVICE = args.AUDIO_INPUT_DEVICE DEBUGGING_MODE = args.DEBUGGING_MODE MAX_TIME = args.TIMEOUT # open codec2 instances for idx in range(3): datac_freedv.append( ctypes.cast( codec2.api.freedv_open(codec2.api.FREEDV_MODE_DATAC0), ctypes.c_void_p ) ) datac_bytes_per_frame.append( int(codec2.api.freedv_get_bits_per_modem_frame(datac_freedv[idx]) / 8) ) datac_bytes_out.append(ctypes.create_string_buffer(datac_bytes_per_frame[idx])) codec2.api.freedv_set_frames_per_burst(datac_freedv[idx], N_FRAMES_PER_BURST) datac_buffer.append(codec2.audio_buffer(2 * AUDIO_FRAMES_PER_BUFFER)) resampler = codec2.resampler() # check if we want to use an audio device then do a pyaudio init if AUDIO_INPUT_DEVICE != -1: p_audio = pyaudio.PyAudio() # auto search for loopback devices if AUDIO_INPUT_DEVICE == -2: loopback_list = [ dev for dev in range(p_audio.get_device_count()) if "Loopback: PCM" in p_audio.get_device_info_by_index(dev)["name"] ] if len(loopback_list) >= 2: AUDIO_INPUT_DEVICE = loopback_list[0] # 0 = RX 1 = TX print(f"loopback_list rx: {loopback_list}", file=sys.stderr) else: sys.exit() print( f"AUDIO INPUT DEVICE: {AUDIO_INPUT_DEVICE} " f"DEVICE: {p_audio.get_device_info_by_index(AUDIO_INPUT_DEVICE)['name']} " f"AUDIO SAMPLE RATE: {AUDIO_SAMPLE_RATE_RX}", file=sys.stderr, ) stream_rx = p_audio.open( format=pyaudio.paInt16, channels=1, rate=AUDIO_SAMPLE_RATE_RX, frames_per_buffer=AUDIO_FRAMES_PER_BUFFER, input=True, input_device_index=AUDIO_INPUT_DEVICE, ) timeout = time.time() + MAX_TIME print(time.time(), MAX_TIME, timeout) receive = True nread_exceptions = 0 # initial nin values datac_nin = [0, 0, 0] for idx in range(3): datac_nin[idx] = codec2.api.freedv_nin(datac_freedv[idx]) def print_stats(time_datac0, time_datac1, time_datac3): if not DEBUGGING_MODE: return time_datac = [time_datac0, time_datac1, time_datac3] datac_rxstatus = ["", "", ""] for idx in range(3): datac_rxstatus[idx] = codec2.api.rx_sync_flags_to_text[ codec2.api.freedv_get_rx_status(datac_freedv[idx]) ] text_out = "" for idx in range(3): text_out += f"NIN{idx}: {datac_nin[idx]:5d} " text_out += f"RX_STATUS{idx}: {datac_rxstatus[idx]:4s} " text_out += f"TIME: {round(time_datac[idx], 4):.4f} | " text_out = text_out.rstrip(" ").rstrip("|").rstrip(" ") print(text_out, file=sys.stderr) 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 ) except OSError as err: print(err, file=sys.stderr) if "Input overflowed" in str(err): nread_exceptions += 1 if "Stream closed" in str(err): print("Ending....") receive = False else: data_in48k = sys.stdin.buffer.read(AUDIO_FRAMES_PER_BUFFER * 2) # insert samples in buffer audio_buffer = np.frombuffer(data_in48k, dtype=np.int16) if len(audio_buffer) != AUDIO_FRAMES_PER_BUFFER: print("len(x)", len(audio_buffer)) receive = False audio_buffer = resampler.resample48_to_8(audio_buffer) for idx in range(3): datac_buffer[idx].push(audio_buffer) while datac_buffer[idx].nbuffer >= datac_nin[idx]: # demodulate audio time_start_datac[idx] = time.time() nbytes = codec2.api.freedv_rawdatarx( datac_freedv[idx], datac_bytes_out[idx], datac_buffer[idx].buffer.ctypes, ) time_end_datac[idx] = time.time() datac_buffer[idx].pop(datac_nin[idx]) datac_nin[idx] = codec2.api.freedv_nin(datac_freedv[idx]) if nbytes == datac_bytes_per_frame[idx]: rx_total_frames_datac[idx] += 1 rx_frames_datac[idx] += 1 if rx_frames_datac[idx] == N_FRAMES_PER_BURST: rx_frames_datac[idx] = 0 rx_bursts_datac[idx] += 1 time_needed_datac[idx] = time_end_datac[idx] - time_start_datac[idx] print_stats( time_needed_datac[0], time_needed_datac[1], time_needed_datac[2] ) if ( rx_bursts_datac[0] == N_BURSTS and rx_bursts_datac[1] == N_BURSTS and rx_bursts_datac[2] == N_BURSTS ): receive = False if nread_exceptions: print( f"nread_exceptions {nread_exceptions:d} - receive audio lost! " "Consider increasing Pyaudio frames_per_buffer...", file=sys.stderr, ) # INFO IF WE REACHED TIMEOUT if time.time() > timeout: print("TIMEOUT REACHED", file=sys.stderr) print( f"DATAC0: {rx_bursts_datac[0]}/{rx_total_frames_datac[0]} " f"DATAC1: {rx_bursts_datac[1]}/{rx_total_frames_datac[1]} " f"DATAC3: {rx_bursts_datac[2]}/{rx_total_frames_datac[2]}", file=sys.stderr, ) if AUDIO_INPUT_DEVICE != -1: stream_rx.close() p_audio.terminate() def parse_arguments(): # --------------------------------------------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( "--audiodev", dest="AUDIO_INPUT_DEVICE", default=-1, type=int, help="audio device number to use", ) parser.add_argument("--debug", dest="DEBUGGING_MODE", action="store_true") parser.add_argument( "--list", dest="LIST", action="store_true", help="list audio devices by number and exit", ) parser.add_argument( "--timeout", dest="TIMEOUT", default=10, type=int, help="Timeout (seconds) before test ends", ) args, _ = parser.parse_known_args() return args if __name__ == "__main__": test_mm_rx()