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https://github.com/DJ2LS/FreeDATA
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dynamic audio sample rate detection
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parent
0efc20defa
commit
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2 changed files with 20 additions and 12 deletions
18
modem.py
18
modem.py
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@ -29,16 +29,24 @@ class RF():
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def __init__(self):
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#-------------------------------------------- LOAD FREEDV
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libname = pathlib.Path().absolute() / "codec2/build_linux/src/libcodec2.so"
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self.c_lib = ctypes.CDLL(libname)
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#--------------------------------------------CREATE PYAUDIO INSTANCE
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self.p = pyaudio.PyAudio()
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#--------------------------------------------GET SUPPORTED SAMPLE RATES FROM SOUND DEVICE
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static.AUDIO_SAMPLE_RATE_RX = int(self.p.get_device_info_by_index(static.AUDIO_INPUT_DEVICE)['defaultSampleRate'])
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static.AUDIO_SAMPLE_RATE_TX = int(self.p.get_device_info_by_index(static.AUDIO_OUTPUT_DEVICE)['defaultSampleRate'])
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#--------------------------------------------OPEN AUDIO CHANNEL RX
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self.p = pyaudio.PyAudio()
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self.stream_rx = self.p.open(format=pyaudio.paInt16,
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channels=static.AUDIO_CHANNELS,
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rate=static.AUDIO_SAMPLE_RATE,
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rate=static.AUDIO_SAMPLE_RATE_RX,
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frames_per_buffer=static.AUDIO_FRAMES_PER_BUFFER,
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input=True,
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input_device_index=static.AUDIO_INPUT_DEVICE,
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@ -46,16 +54,14 @@ class RF():
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#--------------------------------------------OPEN AUDIO CHANNEL TX
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#self.p = pyaudio.PyAudio()
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self.stream_tx = self.p.open(format=pyaudio.paInt16,
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channels=1,
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rate=static.AUDIO_SAMPLE_RATE,
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rate=static.AUDIO_SAMPLE_RATE_TX,
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frames_per_buffer=static.AUDIO_FRAMES_PER_BUFFER, #n_nom_modem_samples
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output=True,
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output_device_index=static.AUDIO_OUTPUT_DEVICE, #static.AUDIO_OUTPUT_DEVICE
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)
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#--------------------------------------------START AUDIO THREAD
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AUDIO_LISTEN_THREAD = threading.Thread(target=self.audio_listen, name="Audio Listener")
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@ -150,7 +156,7 @@ class RF():
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# output_device_index=1, #static.AUDIO_OUTPUT_DEVICE
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# )
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audio = audioop.ratecv(mod_out,2,1,static.MODEM_SAMPLE_RATE, static.AUDIO_SAMPLE_RATE, static.TX_SAMPLE_STATE)
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audio = audioop.ratecv(mod_out,2,1,static.MODEM_SAMPLE_RATE, static.AUDIO_SAMPLE_RATE_TX, static.TX_SAMPLE_STATE)
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self.stream_tx.write(audio[0])
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@ -30,13 +30,15 @@ PORT = 3000
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#AUdio Defaults
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DEFAULT_FRAMES = 1024
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AUDIO_INPUT_DEVICE = 1
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AUDIO_OUTPUT_DEVICE = 1
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TX_SAMPLE_STATE = None
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RX_SAMPLE_STATE = None
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AUDIO_SAMPLE_RATE = 8000
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MODEM_SAMPLE_RATE = 8000
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AUDIO_SAMPLE_RATE_RX = 8000
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AUDIO_SAMPLE_RATE_TX = 8000
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#AUDIO_SAMPLE_RATE = 8000 #8000 44100
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MODEM_SAMPLE_RATE = 8000 #8000
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AUDIO_FRAMES_PER_BUFFER = 2048
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AUDIO_CHANNELS = 1
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