#!/usr/bin/env python3 # -*- coding: utf-8 -*- """ Created on Wed Dec 23 07:04:24 2020 @author: DJ2LS """ # pylint: disable=invalid-name, line-too-long, c-extension-no-member # pylint: disable=import-outside-toplevel import atexit import ctypes import queue import threading import time import codec2 import numpy as np import sounddevice as sd import structlog import tci import cw from queues import RIGCTLD_COMMAND_QUEUE import audio import demodulator TESTMODE = False class RF: """Class to encapsulate interactions between the audio device and codec2""" log = structlog.get_logger("RF") def __init__(self, config, event_manager, fft_queue, service_queue, states, radio_manager) -> None: self.config = config self.service_queue = service_queue self.states = states self.event_manager = event_manager self.radio = radio_manager self.sampler_avg = 0 self.buffer_avg = 0 # these are crc ids now self.audio_input_device = config['AUDIO']['input_device'] self.audio_output_device = config['AUDIO']['output_device'] self.tx_audio_level = config['AUDIO']['tx_audio_level'] self.enable_audio_auto_tune = config['AUDIO']['enable_auto_tune'] self.tx_delay = config['MODEM']['tx_delay'] self.radiocontrol = config['RADIO']['control'] self.rigctld_ip = config['RIGCTLD']['ip'] self.rigctld_port = config['RIGCTLD']['port'] self.states.setTransmitting(False) self.ptt_state = False self.radio_alc = 0.0 self.tci_ip = config['TCI']['tci_ip'] self.tci_port = config['TCI']['tci_port'] self.AUDIO_SAMPLE_RATE = 48000 self.MODEM_SAMPLE_RATE = codec2.api.FREEDV_FS_8000 # 8192 Let's do some tests with very small chunks for TX self.AUDIO_FRAMES_PER_BUFFER_TX = 1200 if self.radiocontrol in ["tci"] else 2400 * 2 # 8 * (self.AUDIO_SAMPLE_RATE/self.MODEM_SAMPLE_RATE) == 48 self.AUDIO_CHANNELS = 1 self.MODE = 0 self.rms_counter = 0 # Make sure our resampler will work assert (self.AUDIO_SAMPLE_RATE / self.MODEM_SAMPLE_RATE) == codec2.api.FDMDV_OS_48 # type: ignore self.audio_received_queue = queue.Queue() self.data_queue_received = queue.Queue() self.fft_queue = fft_queue self.demodulator = demodulator.Demodulator(self.config, self.audio_received_queue, self.data_queue_received, self.states, self.event_manager, self.fft_queue ) def tci_tx_callback(self, audio_48k) -> None: self.radio.set_ptt(True) self.event_manager.send_ptt_change(True) self.tci_module.push_audio(audio_48k) def start_modem(self): if TESTMODE: return True elif self.radiocontrol.lower() == "tci": if not self.init_tci(): return False else: if not self.init_audio(): raise RuntimeError("Unable to init audio devices") self.demodulator.start(self.sd_input_stream) atexit.register(self.sd_input_stream.stop) # Initialize codec2, rig control, and data threads self.init_codec2() self.init_data_threads() return True def stop_modem(self): try: # let's stop the modem service self.service_queue.put("stop") # simulate audio class active state for reducing cli output # self.stream = lambda: None # self.stream.active = False # self.stream.stop except Exception: self.log.error("[MDM] Error stopping modem") def init_audio(self): self.log.info(f"[MDM] init: get audio devices", input_device=self.audio_input_device, output_device=self.audio_output_device) try: result = audio.get_device_index_from_crc(self.audio_input_device, True) if result is None: raise ValueError("Invalid input device") else: in_dev_index, in_dev_name = result result = audio.get_device_index_from_crc(self.audio_output_device, False) if result is None: raise ValueError("Invalid output device") else: out_dev_index, out_dev_name = result self.log.info(f"[MDM] init: receiving audio from '{in_dev_name}'") self.log.info(f"[MDM] init: transmiting audio on '{out_dev_name}'") self.log.debug("[MDM] init: starting pyaudio callback and decoding threads") sd.default.samplerate = self.AUDIO_SAMPLE_RATE sd.default.device = (in_dev_index, out_dev_index) # init codec2 resampler self.resampler = codec2.resampler() # SoundDevice audio input stream self.sd_input_stream = sd.InputStream( channels=1, dtype="int16", callback=self.demodulator.sd_input_audio_callback, device=in_dev_index, samplerate=self.AUDIO_SAMPLE_RATE, blocksize=4800, ) self.sd_input_stream.start() return True except Exception as audioerr: self.log.error("[MDM] init: starting pyaudio callback failed", e=audioerr) self.stop_modem() return False def init_tci(self): # placeholder area for processing audio via TCI # https://github.com/maksimus1210/TCI self.log.warning("[MDM] [TCI] Not yet fully implemented", ip=self.tci_ip, port=self.tci_port) # we are trying this by simulating an audio stream Object like with mkfifo class Object: """An object for simulating audio stream""" active = True self.stream = Object() # lets init TCI module self.tci_module = tci.TCICtrl(self.audio_received_queue) return True def audio_auto_tune(self): # enable / disable AUDIO TUNE Feature / ALC correction if self.enable_audio_auto_tune: if self.radio_alc == 0.0: self.tx_audio_level = self.tx_audio_level + 20 elif 0.0 < self.radio_alc <= 0.1: print("0.0 < self.radio_alc <= 0.1") self.tx_audio_level = self.tx_audio_level + 2 self.log.debug("[MDM] AUDIO TUNE", audio_level=str(self.tx_audio_level), alc_level=str(self.radio_alc)) elif 0.1 < self.radio_alc < 0.2: print("0.1 < self.radio_alc < 0.2") self.tx_audio_level = self.tx_audio_level self.log.debug("[MDM] AUDIO TUNE", audio_level=str(self.tx_audio_level), alc_level=str(self.radio_alc)) elif 0.2 < self.radio_alc < 0.99: print("0.2 < self.radio_alc < 0.99") self.tx_audio_level = self.tx_audio_level - 20 self.log.debug("[MDM] AUDIO TUNE", audio_level=str(self.tx_audio_level), alc_level=str(self.radio_alc)) elif 1.0 >= self.radio_alc: print("1.0 >= self.radio_alc") self.tx_audio_level = self.tx_audio_level - 40 self.log.debug("[MDM] AUDIO TUNE", audio_level=str(self.tx_audio_level), alc_level=str(self.radio_alc)) else: self.log.debug("[MDM] AUDIO TUNE", audio_level=str(self.tx_audio_level), alc_level=str(self.radio_alc)) def transmit( self, mode, repeats: int, repeat_delay: int, frames: bytearray ) -> bool: """ Args: mode: repeats: repeat_delay: frames: """ if TESTMODE: return self.demodulator.reset_data_sync() # get freedv instance by mode mode_transition = { codec2.FREEDV_MODE.signalling: self.freedv_datac13_tx, codec2.FREEDV_MODE.datac0: self.freedv_datac0_tx, codec2.FREEDV_MODE.datac1: self.freedv_datac1_tx, codec2.FREEDV_MODE.datac3: self.freedv_datac3_tx, codec2.FREEDV_MODE.datac4: self.freedv_datac4_tx, codec2.FREEDV_MODE.datac13: self.freedv_datac13_tx, } if mode in mode_transition: freedv = mode_transition[mode] else: print("wrong mode.................") print(mode) return False # Wait for some other thread that might be transmitting self.states.waitForTransmission() self.states.setTransmitting(True) #self.states.channel_busy_event.wait() start_of_transmission = time.time() # Open codec2 instance self.MODE = mode txbuffer = bytes() # Add empty data to handle ptt toggle time if self.tx_delay > 0: self.transmit_add_silence(txbuffer, self.tx_delay) self.log.debug( "[MDM] TRANSMIT", mode=self.MODE.name, delay=self.tx_delay ) if not isinstance(frames, list): frames = [frames] for _ in range(repeats): # Create modulation for all frames in the list for frame in frames: txbuffer = self.transmit_add_preamble(txbuffer, freedv) txbuffer = self.transmit_create_frame(txbuffer, freedv, frame) txbuffer = self.transmit_add_postamble(txbuffer, freedv) # Add delay to end of frames self.transmit_add_silence(txbuffer, repeat_delay) # Re-sample back up to 48k (resampler works on np.int16) x = np.frombuffer(txbuffer, dtype=np.int16) self.audio_auto_tune() x = audio.set_audio_volume(x, self.tx_audio_level) if self.radiocontrol not in ["tci"]: txbuffer_out = self.resampler.resample8_to_48(x) else: txbuffer_out = x # transmit audio self.transmit_audio(txbuffer_out) self.radio.set_ptt(False) self.event_manager.send_ptt_change(False) self.states.setTransmitting(False) end_of_transmission = time.time() transmission_time = end_of_transmission - start_of_transmission self.log.debug("[MDM] ON AIR TIME", time=transmission_time) return True def transmit_add_preamble(self, buffer, freedv): # Init buffer for preample n_tx_preamble_modem_samples = codec2.api.freedv_get_n_tx_preamble_modem_samples( freedv ) mod_out_preamble = ctypes.create_string_buffer(n_tx_preamble_modem_samples * 2) # Write preamble to txbuffer codec2.api.freedv_rawdatapreambletx(freedv, mod_out_preamble) buffer += bytes(mod_out_preamble) return buffer def transmit_add_postamble(self, buffer, freedv): # Init buffer for postamble n_tx_postamble_modem_samples = ( codec2.api.freedv_get_n_tx_postamble_modem_samples(freedv) ) mod_out_postamble = ctypes.create_string_buffer( n_tx_postamble_modem_samples * 2 ) # Write postamble to txbuffer codec2.api.freedv_rawdatapostambletx(freedv, mod_out_postamble) # Append postamble to txbuffer buffer += bytes(mod_out_postamble) return buffer def transmit_add_silence(self, buffer, duration): data_delay = int(self.MODEM_SAMPLE_RATE * (duration / 1000)) # type: ignore mod_out_silence = ctypes.create_string_buffer(data_delay * 2) buffer += bytes(mod_out_silence) return buffer def transmit_create_frame(self, txbuffer, freedv, frame): # 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 # Init buffer for data n_tx_modem_samples = codec2.api.freedv_get_n_tx_modem_samples(freedv) mod_out = ctypes.create_string_buffer(n_tx_modem_samples * 2) # Create buffer for data # Use this if CRC16 checksum is required (DATAc1-3) buffer = bytearray(payload_bytes_per_frame) # Set buffersize to length of data which will be send buffer[: len(frame)] = frame # type: ignore # Create crc for data frame - # Use the crc function shipped with codec2 # to avoid CRC algorithm incompatibilities # Generate CRC16 crc = ctypes.c_ushort( codec2.api.freedv_gen_crc16(bytes(buffer), payload_bytes_per_frame) ) # Convert crc to 2-byte (16-bit) hex string crc = crc.value.to_bytes(2, byteorder="big") # Append CRC to data buffer buffer += crc assert (bytes_per_frame == len(buffer)) data = (ctypes.c_ubyte * bytes_per_frame).from_buffer_copy(buffer) # modulate DATA and save it into mod_out pointer codec2.api.freedv_rawdatatx(freedv, mod_out, data) txbuffer += bytes(mod_out) return txbuffer def transmit_morse(self, repeats, repeat_delay, frames): self.states.waitForTransmission() self.states.setTransmitting(True) # if we're transmitting FreeDATA signals, reset channel busy state self.log.debug( "[MDM] TRANSMIT", mode="MORSE" ) start_of_transmission = time.time() txbuffer_out = cw.MorseCodePlayer().text_to_signal("DJ2LS-1") self.transmit_audio(txbuffer_out) self.radio.set_ptt(False) self.event_manager.send_ptt_change(False) self.states.setTransmitting(False) end_of_transmission = time.time() transmission_time = end_of_transmission - start_of_transmission self.log.debug("[MDM] ON AIR TIME", time=transmission_time) def init_codec2(self): # Open codec2 instances # INIT TX MODES - here we need all modes. self.freedv_datac0_tx = codec2.open_instance(codec2.FREEDV_MODE.datac0.value) self.freedv_datac1_tx = codec2.open_instance(codec2.FREEDV_MODE.datac1.value) self.freedv_datac3_tx = codec2.open_instance(codec2.FREEDV_MODE.datac3.value) self.freedv_datac4_tx = codec2.open_instance(codec2.FREEDV_MODE.datac4.value) self.freedv_datac13_tx = codec2.open_instance(codec2.FREEDV_MODE.datac13.value) # Low level modem audio transmit def transmit_audio(self, audio_48k) -> None: self.radio.set_ptt(True) self.event_manager.send_ptt_change(True) if self.radiocontrol in ["tci"]: self.tci_tx_callback(audio_48k) # we need to wait manually for tci processing self.tci_module.wait_until_transmitted(audio_48k) else: sd.play(audio_48k, blocksize=4096, blocking=True) return