2fceec4d85
1. Support built-in ADC for I2S. 2. Modify code of ADC, made no change to the original APIs. 3. Add APIs in I2S: esp_err_t i2s_set_adc_mode(adc_unit_t adc_unit, adc1_channel_t adc_channel); 4. Add I2S ADC/DAC example code. 5. add old-fashion definition to make it more compatible 6. replase spi_flash_ APIs with esp_partition_ APIs 7. add example of generating audio table from wav 8. change example sound
39 lines
1.4 KiB
Python
39 lines
1.4 KiB
Python
import os
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import wave
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import struct
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def get_wave_array_str(filename, target_bits):
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wave_read = wave.open(filename, "r")
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array_str = ""
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nchannels, sampwidth, framerate, nframes, comptype, compname = wave_read.getparams()
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sampwidth *= 8
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for i in range(wave_read.getnframes()):
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val, = struct.unpack("<H", wave_read.readframes(1))
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scale_val = (1 << target_bits) - 1
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cur_lim = (1 << sampwidth) - 1
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#scale current data to 8-bit data
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val = val * scale_val / cur_lim
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val = (val + ((scale_val + 1) / 2)) & scale_val
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array_str += "0x%x, "%(val)
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if (i + 1) % 16 == 0:
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array_str += "\n"
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return array_str
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def gen_wave_table(wav_file_list, target_file_name, scale_bits = 8):
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with open(target_file_name, "w") as audio_table:
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print >> audio_table, '#include <stdio.h>'
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print >> audio_table, 'const unsigned char audio_table[] = {'
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for wav in wav_file_list:
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print("processing: {}".format(wav))
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print >> audio_table, get_wave_array_str(filename = wav, target_bits = scale_bits)
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print >>audio_table,'};\n'
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print("Done...")
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if __name__=='__main__':
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print("Generating audio array...")
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wav_list = []
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for filename in os.listdir("./"):
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if filename.endswith(".wav"):
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wav_list.append(filename)
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gen_wave_table(wav_file_list = wav_list, target_file_name = "audio_example_file.h")
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