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Shouldn't pass np.int16 to pyaudio stream.write(), must convert to Python bytes. Working OK now

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drowe67 2021-12-16 17:42:29 +10:30 committed by David Rowe
parent 64b7582913
commit 8fcf882767
1 changed files with 6 additions and 6 deletions
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12
test/001_highsnr_stdio_audio/test_tx.py
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@ -68,7 +68,7 @@ if AUDIO_OUTPUT_DEVICE != -1:
rate=AUDIO_SAMPLE_RATE_TX,
frames_per_buffer=AUDIO_FRAMES_PER_BUFFER, #n_nom_modem_samples
output=True,
output_device_index=AUDIO_OUTPUT_DEVICE,
output_device_index=AUDIO_OUTPUT_DEVICE
)
@ -139,16 +139,16 @@ for i in range(1,N_BURSTS+1):
samples_delay = int(MODEM_SAMPLE_RATE*DELAY_BETWEEN_BURSTS)
mod_out_silence = create_string_buffer(samples_delay*2)
txbuffer += bytes(mod_out_silence)
print(f"samples_delay: {samples_delay} DELAY_BETWEEN_BURSTS: {DELAY_BETWEEN_BURSTS}", file=sys.stderr)
#print(f"samples_delay: {samples_delay} DELAY_BETWEEN_BURSTS: {DELAY_BETWEEN_BURSTS}", file=sys.stderr)
# resample up to 48k
# resample up to 48k (resampler works on np.int16)
x = np.frombuffer(txbuffer, dtype=np.int16)
txbuffer_48k = resampler.resample8_to_48(x)
print(len(txbuffer), len(x), len(txbuffer_48k), file=sys.stderr)
# check if we want to use an audio device or stdout
if AUDIO_OUTPUT_DEVICE != -1:
stream_tx.write(txbuffer_48k)
if AUDIO_OUTPUT_DEVICE != -1:
# Gotcha: we have to convert from np.int16 to Python "bytes"
stream_tx.write(txbuffer_48k.tobytes())
else:
# print data to terminal for piping the output to other programs
sys.stdout.buffer.write(txbuffer_48k)