#!/usr/bin/env python3 # -*- coding: utf-8 -*- """ Created on Wed Dec 23 07:04:24 2020 @author: DJ2LS """ import argparse import ctypes import sys import time import numpy as np import pyaudio sys.path.insert(0, "..") from tnc import codec2 # --------------------------------------------GET PARAMETER INPUTS parser = argparse.ArgumentParser(description="FreeDATA audio test") 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() if args.LIST: p = pyaudio.PyAudio() for dev in range(p.get_device_count()): print("audiodev: ", dev, p.get_device_info_by_index(dev)["name"]) class Test: def __init__(self): self.N_BURSTS = args.N_BURSTS self.N_FRAMES_PER_BURST = args.N_FRAMES_PER_BURST self.AUDIO_INPUT_DEVICE = args.AUDIO_INPUT_DEVICE self.DEBUGGING_MODE = args.DEBUGGING_MODE self.TIMEOUT = args.TIMEOUT # AUDIO PARAMETERS self.AUDIO_FRAMES_PER_BUFFER = ( 2400 * 2 ) # <- consider increasing if you get nread_exceptions > 0 self.MODEM_SAMPLE_RATE = codec2.api.FREEDV_FS_8000 self.AUDIO_SAMPLE_RATE_RX = 48000 # make sure our resampler will work assert ( self.AUDIO_SAMPLE_RATE_RX / self.MODEM_SAMPLE_RATE ) == codec2.api.FDMDV_OS_48 # check if we want to use an audio device then do an pyaudio init if self.AUDIO_INPUT_DEVICE != -1: self.p = pyaudio.PyAudio() # auto search for loopback devices if self.AUDIO_INPUT_DEVICE == -2: loopback_list = [ dev for dev in range(self.p.get_device_count()) if "Loopback: PCM" in self.p.get_device_info_by_index(dev)["name"] ] if len(loopback_list) >= 2: self.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: {self.AUDIO_INPUT_DEVICE} DEVICE: {self.p.get_device_info_by_index(self.AUDIO_INPUT_DEVICE)['name']} \ AUDIO SAMPLE RATE: {self.AUDIO_SAMPLE_RATE_RX}", file=sys.stderr, ) self.stream_rx = self.p.open( format=pyaudio.paInt16, channels=1, rate=self.AUDIO_SAMPLE_RATE_RX, frames_per_buffer=self.AUDIO_FRAMES_PER_BUFFER, input=True, output=False, input_device_index=self.AUDIO_INPUT_DEVICE, stream_callback=self.callback, ) else: print("test_callback_multimode_rx_outside: Not written for STDIN usage.") print("Exiting.") sys.exit() # open codec2 instance self.datac0_freedv = ctypes.cast( codec2.api.freedv_open(codec2.api.FREEDV_MODE_DATAC0), ctypes.c_void_p ) self.datac0_bytes_per_frame = int( codec2.api.freedv_get_bits_per_modem_frame(self.datac0_freedv) / 8 ) self.datac0_bytes_out = ctypes.create_string_buffer(self.datac0_bytes_per_frame) codec2.api.freedv_set_frames_per_burst( self.datac0_freedv, self.N_FRAMES_PER_BURST ) self.datac0_buffer = codec2.audio_buffer(2 * self.AUDIO_FRAMES_PER_BUFFER) self.datac1_freedv = ctypes.cast( codec2.api.freedv_open(codec2.api.FREEDV_MODE_DATAC1), ctypes.c_void_p ) self.datac1_bytes_per_frame = int( codec2.api.freedv_get_bits_per_modem_frame(self.datac1_freedv) / 8 ) self.datac1_bytes_out = ctypes.create_string_buffer(self.datac1_bytes_per_frame) codec2.api.freedv_set_frames_per_burst( self.datac1_freedv, self.N_FRAMES_PER_BURST ) self.datac1_buffer = codec2.audio_buffer(2 * self.AUDIO_FRAMES_PER_BUFFER) self.datac3_freedv = ctypes.cast( codec2.api.freedv_open(codec2.api.FREEDV_MODE_DATAC3), ctypes.c_void_p ) self.datac3_bytes_per_frame = int( codec2.api.freedv_get_bits_per_modem_frame(self.datac3_freedv) / 8 ) self.datac3_bytes_out = ctypes.create_string_buffer(self.datac3_bytes_per_frame) codec2.api.freedv_set_frames_per_burst( self.datac3_freedv, self.N_FRAMES_PER_BURST ) self.datac3_buffer = codec2.audio_buffer(2 * self.AUDIO_FRAMES_PER_BUFFER) # SET COUNTERS self.rx_total_frames_datac0 = 0 self.rx_frames_datac0 = 0 self.rx_bursts_datac0 = 0 self.rx_total_frames_datac1 = 0 self.rx_frames_datac1 = 0 self.rx_bursts_datac1 = 0 self.rx_total_frames_datac3 = 0 self.rx_frames_datac3 = 0 self.rx_bursts_datac3 = 0 self.rx_errors = 0 self.nread_exceptions = 0 self.timeout = time.time() + self.TIMEOUT self.receive = True self.resampler = codec2.resampler() # Copy received 48 kHz to a file. Listen to this file with: # aplay -r 48000 -f S16_LE rx48_callback.raw # Corruption of this file is a good way to detect audio card issues self.frx = open("rx48_callback_multimode.raw", mode="wb") # initial nin values self.datac0_nin = codec2.api.freedv_nin(self.datac0_freedv) self.datac1_nin = codec2.api.freedv_nin(self.datac1_freedv) self.datac3_nin = codec2.api.freedv_nin(self.datac3_freedv) def callback(self, data_in48k, frame_count, time_info, status): x = np.frombuffer(data_in48k, dtype=np.int16) x.tofile(self.frx) x = self.resampler.resample48_to_8(x) self.datac0_buffer.push(x) self.datac1_buffer.push(x) self.datac3_buffer.push(x) return (None, pyaudio.paContinue) def print_stats(self): if self.DEBUGGING_MODE: self.datac0_rxstatus = codec2.api.freedv_get_rx_status(self.datac0_freedv) self.datac0_rxstatus = codec2.api.rx_sync_flags_to_text[ self.datac0_rxstatus ] self.datac1_rxstatus = codec2.api.freedv_get_rx_status(self.datac1_freedv) self.datac1_rxstatus = codec2.api.rx_sync_flags_to_text[ self.datac1_rxstatus ] self.datac3_rxstatus = codec2.api.freedv_get_rx_status(self.datac3_freedv) self.datac3_rxstatus = codec2.api.rx_sync_flags_to_text[ self.datac3_rxstatus ] print( "NIN0: %5d RX_STATUS0: %4s NIN1: %5d RX_STATUS1: %4s NIN3: %5d RX_STATUS3: %4s" % ( self.datac0_nin, self.datac0_rxstatus, self.datac1_nin, self.datac1_rxstatus, self.datac3_nin, self.datac3_rxstatus, ), file=sys.stderr, ) def run_audio(self): try: print(f"starting pyaudio callback", file=sys.stderr) self.stream_rx.start_stream() except Exception as e: print(f"pyAudio error: {e}", file=sys.stderr) while self.receive and time.time() < self.timeout: while self.datac0_buffer.nbuffer >= self.datac0_nin: # demodulate audio nbytes = codec2.api.freedv_rawdatarx( self.datac0_freedv, self.datac0_bytes_out, self.datac0_buffer.buffer.ctypes, ) self.datac0_buffer.pop(self.datac0_nin) self.datac0_nin = codec2.api.freedv_nin(self.datac0_freedv) if nbytes == self.datac0_bytes_per_frame: self.rx_total_frames_datac0 = self.rx_total_frames_datac0 + 1 self.rx_frames_datac0 = self.rx_frames_datac0 + 1 if self.rx_frames_datac0 == self.N_FRAMES_PER_BURST: self.rx_frames_datac0 = 0 self.rx_bursts_datac0 = self.rx_bursts_datac0 + 1 self.print_stats() while self.datac1_buffer.nbuffer >= self.datac1_nin: # demodulate audio nbytes = codec2.api.freedv_rawdatarx( self.datac1_freedv, self.datac1_bytes_out, self.datac1_buffer.buffer.ctypes, ) self.datac1_buffer.pop(self.datac1_nin) self.datac1_nin = codec2.api.freedv_nin(self.datac1_freedv) if nbytes == self.datac1_bytes_per_frame: self.rx_total_frames_datac1 = self.rx_total_frames_datac1 + 1 self.rx_frames_datac1 = self.rx_frames_datac1 + 1 if self.rx_frames_datac1 == self.N_FRAMES_PER_BURST: self.rx_frames_datac1 = 0 self.rx_bursts_datac1 = self.rx_bursts_datac1 + 1 self.print_stats() while self.datac3_buffer.nbuffer >= self.datac3_nin: # demodulate audio nbytes = codec2.api.freedv_rawdatarx( self.datac3_freedv, self.datac3_bytes_out, self.datac3_buffer.buffer.ctypes, ) self.datac3_buffer.pop(self.datac3_nin) self.datac3_nin = codec2.api.freedv_nin(self.datac3_freedv) if nbytes == self.datac3_bytes_per_frame: self.rx_total_frames_datac3 = self.rx_total_frames_datac3 + 1 self.rx_frames_datac3 = self.rx_frames_datac3 + 1 if self.rx_frames_datac3 == self.N_FRAMES_PER_BURST: self.rx_frames_datac3 = 0 self.rx_bursts_datac3 = self.rx_bursts_datac3 + 1 self.print_stats() if ( self.rx_bursts_datac0 and self.rx_bursts_datac1 and self.rx_bursts_datac3 ) == self.N_BURSTS: self.receive = False if time.time() >= self.timeout: print("TIMEOUT REACHED") if self.nread_exceptions: print( "nread_exceptions %d - receive audio lost! Consider increasing Pyaudio frames_per_buffer..." % self.nread_exceptions, file=sys.stderr, ) print( f"DATAC0: {self.rx_bursts_datac0}/{self.rx_total_frames_datac0} DATAC1: {self.rx_bursts_datac1}/{self.rx_total_frames_datac1} DATAC3: {self.rx_bursts_datac3}/{self.rx_total_frames_datac3}", file=sys.stderr, ) self.frx.close() # cloese pyaudio instance self.stream_rx.close() self.p.terminate() test = Test() test.run_audio()