static void usage(void)
{
    faad_fprintf(stdout, "\nUsage:\n");
    faad_fprintf(stdout, "%s [options] infile.aac\n", progName);
    faad_fprintf(stdout, "Options:\n");
    faad_fprintf(stdout, " -h    Shows this help screen.\n");
    faad_fprintf(stdout, " -i    Shows info about the input file.\n");
    faad_fprintf(stdout, " -a X  Write MPEG-4 AAC ADTS output file.\n");
    faad_fprintf(stdout, " -t    Assume old ADTS format.\n");
    faad_fprintf(stdout, " -o X  Set output filename.\n");
    faad_fprintf(stdout, " -f X  Set output format. Valid values for X are:\n");
    faad_fprintf(stdout, "        1:  Microsoft WAV format (default).\n");
    faad_fprintf(stdout, "        2:  RAW PCM data.\n");
    faad_fprintf(stdout, " -b X  Set output sample format. Valid values for X are:\n");
    faad_fprintf(stdout, "        1:  16 bit PCM data (default).\n");
    faad_fprintf(stdout, "        2:  24 bit PCM data.\n");
    faad_fprintf(stdout, "        3:  32 bit PCM data.\n");
    faad_fprintf(stdout, "        4:  32 bit floating point data.\n");
    faad_fprintf(stdout, "        5:  64 bit floating point data.\n");
    faad_fprintf(stdout, " -s X  Force the samplerate to X (for RAW files).\n");
    faad_fprintf(stdout, " -l X  Set object type. Supported object types:\n");
    faad_fprintf(stdout, "        1:  Main object type.\n");
    faad_fprintf(stdout, "        2:  LC (Low Complexity) object type.\n");
    faad_fprintf(stdout, "        4:  LTP (Long Term Prediction) object type.\n");
    faad_fprintf(stdout, "        23: LD (Low Delay) object type.\n");
    faad_fprintf(stdout, " -d    Down matrix 5.1 to 2 channels\n");
    faad_fprintf(stdout, " -w    Write output to stdio instead of a file.\n");
    faad_fprintf(stdout, " -g    Disable gapless decoding.\n");
    faad_fprintf(stdout, " -q    Quiet - suppresses status messages.\n");
    faad_fprintf(stdout, "Example:\n");
    faad_fprintf(stdout, "       %s infile.aac\n", progName);
    faad_fprintf(stdout, "       %s infile.mp4\n", progName);
    faad_fprintf(stdout, "       %s -o outfile.wav infile.aac\n", progName);
    faad_fprintf(stdout, "       %s -w infile.aac > outfile.wav\n", progName);
    faad_fprintf(stdout, "       %s -a outfile.aac infile.aac\n", progName);
    return;
}
Unknown