EmbeddedPkg: Extend NvVarStoreFormattedLib LIBRARY_CLASS

[mirror_edk2.git] / AppPkg / Applications / Python / Python-2.7.2 / Demo / scripts / morse.py

#! /usr/bin/env python\r
\r
# DAH should be three DOTs.\r
# Space between DOTs and DAHs should be one DOT.\r
# Space between two letters should be one DAH.\r
# Space between two words should be DOT DAH DAH.\r
\r
import sys, math, audiodev\r
\r
DOT = 30\r
DAH = 3 * DOT\r
OCTAVE = 2                              # 1 == 441 Hz, 2 == 882 Hz, ...\r
\r
morsetab = {\r
        'A': '.-',              'a': '.-',\r
        'B': '-...',            'b': '-...',\r
        'C': '-.-.',            'c': '-.-.',\r
        'D': '-..',             'd': '-..',\r
        'E': '.',               'e': '.',\r
        'F': '..-.',            'f': '..-.',\r
        'G': '--.',             'g': '--.',\r
        'H': '....',            'h': '....',\r
        'I': '..',              'i': '..',\r
        'J': '.---',            'j': '.---',\r
        'K': '-.-',             'k': '-.-',\r
        'L': '.-..',            'l': '.-..',\r
        'M': '--',              'm': '--',\r
        'N': '-.',              'n': '-.',\r
        'O': '---',             'o': '---',\r
        'P': '.--.',            'p': '.--.',\r
        'Q': '--.-',            'q': '--.-',\r
        'R': '.-.',             'r': '.-.',\r
        'S': '...',             's': '...',\r
        'T': '-',               't': '-',\r
        'U': '..-',             'u': '..-',\r
        'V': '...-',            'v': '...-',\r
        'W': '.--',             'w': '.--',\r
        'X': '-..-',            'x': '-..-',\r
        'Y': '-.--',            'y': '-.--',\r
        'Z': '--..',            'z': '--..',\r
        '0': '-----',           ',': '--..--',\r
        '1': '.----',           '.': '.-.-.-',\r
        '2': '..---',           '?': '..--..',\r
        '3': '...--',           ';': '-.-.-.',\r
        '4': '....-',           ':': '---...',\r
        '5': '.....',           "'": '.----.',\r
        '6': '-....',           '-': '-....-',\r
        '7': '--...',           '/': '-..-.',\r
        '8': '---..',           '(': '-.--.-',\r
        '9': '----.',           ')': '-.--.-',\r
        ' ': ' ',               '_': '..--.-',\r
}\r
\r
nowave = '\0' * 200\r
\r
# If we play at 44.1 kHz (which we do), then if we produce one sine\r
# wave in 100 samples, we get a tone of 441 Hz.  If we produce two\r
# sine waves in these 100 samples, we get a tone of 882 Hz.  882 Hz\r
# appears to be a nice one for playing morse code.\r
def mkwave(octave):\r
    sinewave = ''\r
    for i in range(100):\r
        val = int(math.sin(math.pi * i * octave / 50.0) * 30000)\r
        sinewave += chr((val >> 8) & 255) + chr(val & 255)\r
    return sinewave\r
\r
defaultwave = mkwave(OCTAVE)\r
\r
def main():\r
    import getopt\r
    try:\r
        opts, args = getopt.getopt(sys.argv[1:], 'o:p:')\r
    except getopt.error:\r
        sys.stderr.write('Usage ' + sys.argv[0] +\r
                         ' [ -o outfile ] [ -p octave ] [ words ] ...\n')\r
        sys.exit(1)\r
    dev = None\r
    wave = defaultwave\r
    for o, a in opts:\r
        if o == '-o':\r
            import aifc\r
            dev = aifc.open(a, 'w')\r
            dev.setframerate(44100)\r
            dev.setsampwidth(2)\r
            dev.setnchannels(1)\r
        if o == '-p':\r
            wave = mkwave(int(a))\r
    if not dev:\r
        import audiodev\r
        dev = audiodev.AudioDev()\r
        dev.setoutrate(44100)\r
        dev.setsampwidth(2)\r
        dev.setnchannels(1)\r
        dev.close = dev.stop\r
        dev.writeframesraw = dev.writeframes\r
    if args:\r
        source = [' '.join(args)]\r
    else:\r
        source = iter(sys.stdin.readline, '')\r
    for line in source:\r
        mline = morse(line)\r
        play(mline, dev, wave)\r
        if hasattr(dev, 'wait'):\r
            dev.wait()\r
    dev.close()\r
\r
# Convert a string to morse code with \001 between the characters in\r
# the string.\r
def morse(line):\r
    res = ''\r
    for c in line:\r
        try:\r
            res += morsetab[c] + '\001'\r
        except KeyError:\r
            pass\r
    return res\r
\r
# Play a line of morse code.\r
def play(line, dev, wave):\r
    for c in line:\r
        if c == '.':\r
            sine(dev, DOT, wave)\r
        elif c == '-':\r
            sine(dev, DAH, wave)\r
        else:                   # space\r
            pause(dev, DAH + DOT)\r
        pause(dev, DOT)\r
\r
def sine(dev, length, wave):\r
    for i in range(length):\r
        dev.writeframesraw(wave)\r
\r
def pause(dev, length):\r
    for i in range(length):\r
        dev.writeframesraw(nowave)\r
\r
if __name__ == '__main__':\r
    main()\r