diff options
Diffstat (limited to 'AppPkg/Applications/Python/Python-2.7.2/Demo/scripts/morse.py')
| -rw-r--r-- | AppPkg/Applications/Python/Python-2.7.2/Demo/scripts/morse.py | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/AppPkg/Applications/Python/Python-2.7.2/Demo/scripts/morse.py b/AppPkg/Applications/Python/Python-2.7.2/Demo/scripts/morse.py new file mode 100644 index 0000000000..138a186711 --- /dev/null +++ b/AppPkg/Applications/Python/Python-2.7.2/Demo/scripts/morse.py @@ -0,0 +1,138 @@ +#! /usr/bin/env python
+
+# 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': '----.', ')': '-.--.-',
+ ' ': ' ', '_': '..--.-',
+}
+
+nowave = '\0' * 200
+
+# 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):
+ sinewave = ''
+ for i in range(100):
+ val = int(math.sin(math.pi * i * octave / 50.0) * 30000)
+ sinewave += chr((val >> 8) & 255) + chr(val & 255)
+ return sinewave
+
+defaultwave = mkwave(OCTAVE)
+
+def main():
+ import getopt
+ try:
+ opts, args = getopt.getopt(sys.argv[1:], 'o:p:')
+ except getopt.error:
+ sys.stderr.write('Usage ' + sys.argv[0] +
+ ' [ -o outfile ] [ -p octave ] [ words ] ...\n')
+ sys.exit(1)
+ dev = None
+ wave = defaultwave
+ 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':
+ wave = mkwave(int(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:
+ source = [' '.join(args)]
+ else:
+ source = iter(sys.stdin.readline, '')
+ for line in source:
+ mline = morse(line)
+ play(mline, dev, wave)
+ if hasattr(dev, 'wait'):
+ dev.wait()
+ 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 += morsetab[c] + '\001'
+ except KeyError:
+ pass
+ return res
+
+# Play a line of morse code.
+def play(line, dev, wave):
+ for c in line:
+ if c == '.':
+ sine(dev, DOT, wave)
+ elif c == '-':
+ sine(dev, DAH, wave)
+ else: # space
+ pause(dev, DAH + DOT)
+ pause(dev, DOT)
+
+def sine(dev, length, wave):
+ for i in range(length):
+ dev.writeframesraw(wave)
+
+def pause(dev, length):
+ for i in range(length):
+ dev.writeframesraw(nowave)
+
+if __name__ == '__main__':
+ main()
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