2024-05-16 11:47:49 +00:00
|
|
|
import os
|
|
|
|
import sys
|
|
|
|
import soundfile as sf
|
|
|
|
import samplerate
|
|
|
|
|
|
|
|
# Adapted from https://github.com/rgrosset/pico-pwm-audio
|
|
|
|
|
|
|
|
print("loading file...")
|
|
|
|
|
|
|
|
soundfile = 'audio/output.wav'
|
|
|
|
data_in, datasamplerate = sf.read(soundfile)
|
|
|
|
# This means stereo so extract one channel 0
|
|
|
|
if len(data_in.shape)>1:
|
|
|
|
data_in = data_in[:,0]
|
|
|
|
|
|
|
|
print("resampling...")
|
|
|
|
|
|
|
|
converter = 'sinc_best' # or 'sinc_fastest', ...
|
2024-05-25 10:06:50 +00:00
|
|
|
desired_sample_rate = 22000.0
|
2024-05-16 11:47:49 +00:00
|
|
|
ratio = desired_sample_rate/datasamplerate
|
|
|
|
data_out = samplerate.resample(data_in, ratio, converter)
|
|
|
|
|
|
|
|
print("analyzing...")
|
|
|
|
|
|
|
|
maxValue = max(data_out)
|
|
|
|
minValue = min(data_out)
|
|
|
|
print("length", len(data_out))
|
|
|
|
print("max value", max(data_out))
|
|
|
|
print("min value", min(data_out))
|
|
|
|
vrange = (maxValue - minValue)
|
|
|
|
print("value range", vrange)
|
|
|
|
|
|
|
|
print("normalizing...")
|
|
|
|
|
|
|
|
# normalize to 0-1
|
|
|
|
normalized = [int((v-minValue)/vrange*255) for v in data_out]
|
|
|
|
|
2024-05-17 18:40:58 +00:00
|
|
|
# print("generating header...")
|
2024-05-16 11:47:49 +00:00
|
|
|
|
2024-05-17 18:40:58 +00:00
|
|
|
# m68code = "/* File "+soundfile+ "\r\n * Sample rate "+str(int(desired_sample_rate)) +" Hz\r\n */\r\n"
|
|
|
|
# m68code += "#define WAV_DATA_LENGTH "+str(len(data_out))+" \r\n\r\n"
|
|
|
|
# m68code += "static const uint8_t WAV_DATA[] = {\r\n "
|
2024-05-16 11:47:49 +00:00
|
|
|
|
2024-05-17 18:40:58 +00:00
|
|
|
# m68code += ','.join(str(v) for v in normalized)
|
2024-05-16 11:47:49 +00:00
|
|
|
|
2024-05-17 18:40:58 +00:00
|
|
|
# # keep track of first and last values to avoid
|
|
|
|
# # blip when the loop restarts.. make the end value
|
|
|
|
# # the average of the first and last.
|
|
|
|
# end_value = int( (normalized[0] + normalized[len(normalized) - 1]) / 2)
|
|
|
|
# m68code+=","+str(end_value)+'\n};\n'
|
2024-05-16 11:47:49 +00:00
|
|
|
|
2024-05-17 18:40:58 +00:00
|
|
|
# print("writing output...")
|
2024-05-16 11:47:49 +00:00
|
|
|
|
2024-05-17 18:40:58 +00:00
|
|
|
# with open("src/audio_sample.h", "w") as f:
|
|
|
|
# f.write(m68code)
|
2024-05-16 11:47:49 +00:00
|
|
|
|
2024-05-17 18:40:58 +00:00
|
|
|
# print("done!")
|
2024-05-17 17:03:59 +00:00
|
|
|
|
|
|
|
print("writing blob...")
|
|
|
|
|
|
|
|
with open("audio/audio.bin", "wb") as f:
|
|
|
|
f.write(bytes(normalized))
|
|
|
|
|
|
|
|
print("done!")
|