diff -r ffa851df0825 -r 2fb8b9db1c86 symbian-qemu-0.9.1-12/python-2.6.1/Demo/scripts/morse.py --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/symbian-qemu-0.9.1-12/python-2.6.1/Demo/scripts/morse.py Fri Jul 31 15:01:17 2009 +0100 @@ -0,0 +1,149 @@ +# DAH should be three DOTs. +# Space between DOTs and DAHs should be one DOT. +# Space between two letters should be one DAH. +# Space between two words should be DOT DAH DAH. + +import sys, math, audiodev + +DOT = 30 +DAH = 3 * DOT +OCTAVE = 2 # 1 == 441 Hz, 2 == 882 Hz, ... + +morsetab = { + 'A': '.-', 'a': '.-', + 'B': '-...', 'b': '-...', + 'C': '-.-.', 'c': '-.-.', + 'D': '-..', 'd': '-..', + 'E': '.', 'e': '.', + 'F': '..-.', 'f': '..-.', + 'G': '--.', 'g': '--.', + 'H': '....', 'h': '....', + 'I': '..', 'i': '..', + 'J': '.---', 'j': '.---', + 'K': '-.-', 'k': '-.-', + 'L': '.-..', 'l': '.-..', + 'M': '--', 'm': '--', + 'N': '-.', 'n': '-.', + 'O': '---', 'o': '---', + 'P': '.--.', 'p': '.--.', + 'Q': '--.-', 'q': '--.-', + 'R': '.-.', 'r': '.-.', + 'S': '...', 's': '...', + 'T': '-', 't': '-', + 'U': '..-', 'u': '..-', + 'V': '...-', 'v': '...-', + 'W': '.--', 'w': '.--', + 'X': '-..-', 'x': '-..-', + 'Y': '-.--', 'y': '-.--', + 'Z': '--..', 'z': '--..', + '0': '-----', + '1': '.----', + '2': '..---', + '3': '...--', + '4': '....-', + '5': '.....', + '6': '-....', + '7': '--...', + '8': '---..', + '9': '----.', + ',': '--..--', + '.': '.-.-.-', + '?': '..--..', + ';': '-.-.-.', + ':': '---...', + "'": '.----.', + '-': '-....-', + '/': '-..-.', + '(': '-.--.-', + ')': '-.--.-', + '_': '..--.-', + ' ': ' ' +} + +# If we play at 44.1 kHz (which we do), then if we produce one sine +# wave in 100 samples, we get a tone of 441 Hz. If we produce two +# sine waves in these 100 samples, we get a tone of 882 Hz. 882 Hz +# appears to be a nice one for playing morse code. +def mkwave(octave): + global sinewave, nowave + sinewave = '' + for i in range(100): + val = int(math.sin(math.pi * float(i) * octave / 50.0) * 30000) + sinewave = sinewave + chr((val >> 8) & 255) + chr(val & 255) + nowave = '\0' * 200 + +mkwave(OCTAVE) + +def main(): + import getopt, string + try: + opts, args = getopt.getopt(sys.argv[1:], 'o:p:') + except getopt.error: + sys.stderr.write('Usage ' + sys.argv[0] + + ' [ -o outfile ] [ args ] ...\n') + sys.exit(1) + dev = None + for o, a in opts: + if o == '-o': + import aifc + dev = aifc.open(a, 'w') + dev.setframerate(44100) + dev.setsampwidth(2) + dev.setnchannels(1) + if o == '-p': + mkwave(string.atoi(a)) + if not dev: + import audiodev + dev = audiodev.AudioDev() + dev.setoutrate(44100) + dev.setsampwidth(2) + dev.setnchannels(1) + dev.close = dev.stop + dev.writeframesraw = dev.writeframes + if args: + line = string.join(args) + else: + line = sys.stdin.readline() + while line: + mline = morse(line) + play(mline, dev) + if hasattr(dev, 'wait'): + dev.wait() + if not args: + line = sys.stdin.readline() + else: + line = '' + dev.close() + +# Convert a string to morse code with \001 between the characters in +# the string. +def morse(line): + res = '' + for c in line: + try: + res = res + morsetab[c] + '\001' + except KeyError: + pass + return res + +# Play a line of morse code. +def play(line, dev): + for c in line: + if c == '.': + sine(dev, DOT) + elif c == '-': + sine(dev, DAH) + else: # space + pause(dev, DAH + DOT) + pause(dev, DOT) + +def sine(dev, length): + for i in range(length): + dev.writeframesraw(sinewave) + +def pause(dev, length): + for i in range(length): + dev.writeframesraw(nowave) + +if __name__ == '__main__' or sys.argv[0] == __name__: + main()