lame_enc.py 文件源码

def try_enc():
    import os
    inFile = open('x.wav', 'rb')
    inFile.seek(0, os.SEEK_END)
    wavFileSize = inFile.tell()
    inFile.seek(44) # skip wav header


    outFile = open('x.mp3', 'wb')
    lame = LameEncoder(44100,1,128)

    while(1):
        inBytes = inFile.read(512)
        if inBytes == '':
            break
        #inBuf = ctypes.create_string_buffer(inBytes, 512)
        sample_count    = len(inBytes) /2
        output_buff_len = int(1.25 * sample_count + 7200)
        output_buff     = (ctypes.c_char*output_buff_len)()
        lame.dll.lame_encode_buffer.argtypes = [ctypes.c_void_p, ctypes.c_void_p, ctypes.c_int, ctypes.c_int, ctypes.POINTER(ctypes.c_char), ctypes.c_int];
        output_size     = lame.dll.lame_encode_buffer(lame.lame, inBytes, 0, len(inBytes)/2, output_buff, output_buff_len);
        outFile.write(output_buff[0:output_size])

    outFile.close()