diff options
Diffstat (limited to 'Mac')
| -rw-r--r-- | Mac/Demo/sound/morse.py | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/Mac/Demo/sound/morse.py b/Mac/Demo/sound/morse.py deleted file mode 100644 index 79ec6f5..0000000 --- a/Mac/Demo/sound/morse.py +++ /dev/null @@ -1,180 +0,0 @@ -import sys, math, audiodev - -DOT = 30 -DAH = 80 -OCTAVE = 2 # 1 == 441 Hz, 2 == 882 Hz, ... -SAMPWIDTH = 2 -FRAMERATE = 44100 -BASEFREQ = 441 -QSIZE = 20000 - -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 = '' - n = int(FRAMERATE / BASEFREQ) - for i in range(n): - val = int(math.sin(2 * math.pi * i * octave / n) * 0x7fff) - sample = chr((val >> 8) & 255) + chr(val & 255) - sinewave = sinewave + sample[:SAMPWIDTH] - nowave = '\0' * (n*SAMPWIDTH) - -mkwave(OCTAVE) - -class BufferedAudioDev: - def __init__(self, *args): - import audiodev - self._base = audiodev.AudioDev(*args) - self._buffer = [] - self._filled = 0 - self._addmethods(self._base, self._base.__class__) - def _addmethods(self, inst, cls): - for name in cls.__dict__.keys(): - if not hasattr(self, name): - try: - setattr(self, name, getattr(inst, name)) - except: - pass - for basecls in cls.__bases__: - self._addmethods(self, inst, basecls) - def writeframesraw(self, frames): - self._buffer.append(frames) - self._filled = self._filled + len(frames) - if self._filled >= QSIZE: - self.flush() - def wait(self): - self.flush() - self._base.wait() - def flush(self): - print 'flush: %d blocks, %d bytes' % (len(self._buffer), self._filled) - if self._buffer: - import string - self._base.writeframes(string.joinfields(self._buffer, '')) - self._buffer = [] - self._filled = 0 - -def main(args = sys.argv[1:]): - import getopt, string - try: - opts, args = getopt.getopt(args, '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(FRAMERATE) - dev.setsampwidth(SAMPWIDTH) - dev.setnchannels(1) - if o == '-p': - mkwave(string.atoi(a)) - if not dev: - dev = BufferedAudioDev() - dev.setoutrate(FRAMERATE) - dev.setsampwidth(SAMPWIDTH) - dev.setnchannels(1) - dev.close = dev.stop - if args: - line = string.join(args) - else: - line = sys.stdin.readline() - while line: - print line - mline = morse(line) - print mline - 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: - pause(dev, DAH) - pause(dev, DOT) - -def sine(dev, length): - dev.writeframesraw(sinewave*length) - -def pause(dev, length): - dev.writeframesraw(nowave*length) - -if __name__ == '__main__' or sys.argv[0] == __name__: - main() |