pyogg opus test

opus_test.py

# Convert raw data from Alexa remote control - Bluetooth
import wave
from pyogg import OpusDecoder

if __name__ == "__main__":
    # Setup decoding
    # ==============

    # Create an Opus decoder
    opus_decoder = OpusDecoder()
    channels = 1
    opus_decoder.set_channels(channels)
    samples_per_second = 16000
    opus_decoder.set_sampling_frequency(samples_per_second)

    # Open an output wav for the decoded PCM
    output_filename = "output.wav"
    wave_write = wave.open(output_filename, "wb")
    print("Writing wav into file '{:s}'".format(output_filename))

    # Save the wav's specification
    wave_write.setnchannels(channels)
    wave_write.setframerate(samples_per_second)
    bytes_per_sample = 2
    wave_write.setsampwidth(bytes_per_sample)

    # Execute decode
    # =====================
    
    # Loop through the raw file's opus data and decode it, the save it as wav file
    packet_pos = 0
    opus_file = open("audio.raw","rb")
    opus_buffer = bytearray(opus_file.read())
    opus_file.close()
    while packet_pos < len(opus_buffer):
            
        # decode this in 80-bytes-steps
        # using OpusDecoder.
        decoded_pcm = opus_decoder.decode(opus_buffer[packet_pos:packet_pos+80])
        print("frame done:", packet_pos/80)
        packet_pos += 80
        # Save the decoded PCM as a new wav filepython3 
        wave_write.writeframes(decoded_pcm)

    wave_write.close()
    print("Finished.")