添加智能灯固件代码

firmware/esp-idf/wumei-smart-firmware/examples/peripherals/i2s_adc_dac/tools/generate_audio_file.py

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+from __future__ import print_function
+from builtins import range
+import os
+import wave
+import struct
+
+
+def get_wave_array_str(filename, target_bits):
+    wave_read = wave.open(filename, "r")
+    array_str = ""
+    nchannels, sampwidth, framerate, nframes, comptype, compname = wave_read.getparams()
+    sampwidth *= 8
+    for i in range(wave_read.getnframes()):
+        val, = struct.unpack("<H", wave_read.readframes(1))
+        scale_val = (1 << target_bits) - 1
+        cur_lim   = (1 << sampwidth) - 1
+        # scale current data to 8-bit data
+        val       = val * scale_val / cur_lim
+        val       = int(val + ((scale_val + 1) // 2)) & scale_val
+        array_str += "0x%x, " % (val)
+        if (i + 1) % 16 == 0:
+            array_str += "\n"
+    return array_str
+
+
+def gen_wave_table(wav_file_list, target_file_name, scale_bits=8):
+    with open(target_file_name, "w") as audio_table:
+        print('#include <stdio.h>', file=audio_table)
+        print('const unsigned char audio_table[] = {', file=audio_table)
+        for wav in wav_file_list:
+            print("processing: {}".format(wav))
+            print(get_wave_array_str(filename=wav, target_bits=scale_bits), file=audio_table)
+        print('};\n', file=audio_table)
+    print("Done...")
+
+
+if __name__ == '__main__':
+    print("Generating audio array...")
+    wav_list = []
+    for filename in os.listdir("./"):
+        if filename.endswith(".wav"):
+            wav_list.append(filename)
+    gen_wave_table(wav_file_list=wav_list, target_file_name="audio_example_file.h")