def fancyCrackle(self, levels, volume):
levels = self.uniformSample(levels, self.MAX_BEEP_COUNT )
beepLen = self.BEEP_LEN
pauseLen = self.PAUSE_LEN
pauseBufSize = NVDAHelper.generateBeep(None,self.BASE_FREQ,pauseLen,0, 0)
beepBufSizes = [NVDAHelper.generateBeep(None,self.getPitch(l), beepLen, volume, volume) for l in levels]
bufSize = sum(beepBufSizes) + len(levels) * pauseBufSize
buf = ctypes.create_string_buffer(bufSize)
bufPtr = 0
for l in levels:
bufPtr += NVDAHelper.generateBeep(
ctypes.cast(ctypes.byref(buf, bufPtr), ctypes.POINTER(ctypes.c_char)),
self.getPitch(l), beepLen, volume, volume)
bufPtr += pauseBufSize # add a short pause
tones.player.stop()
tones.player.feed(buf.raw)
def play(values):
pitches = list(map(value_to_pitch, values))
n = len(pitches)
beepBufSizes = [
NVDAHelper.generateBeep(None, pitches[i], beep_duration, beep_volume,
beep_volume) for i in range(n)
]
bufSize = sum(beepBufSizes)
buf = ctypes.create_string_buffer(bufSize)
bufPtr = 0
for pitch in pitches:
bufPtr += NVDAHelper.generateBeep(
ctypes.cast(ctypes.byref(buf, bufPtr),
ctypes.POINTER(ctypes.c_char)), pitch, beep_duration,
beep_volume, beep_volume)
tones.player.stop()
speech.cancelSpeech()
tones.player.feed(buf.raw)
def fancyBeep(self, chord, length, left=10, right=10):
beepLen = length
freqs = self.getChordFrequencies(chord)
intSize = 8 # bytes
bufSize = max([NVDAHelper.generateBeep(None,freq, beepLen, right, left) for freq in freqs])
if bufSize % intSize != 0:
bufSize += intSize
bufSize -= (bufSize % intSize)
tones.player.stop()
bbs = []
result = [0] * (bufSize//intSize)
for freq in freqs:
buf = ctypes.create_string_buffer(bufSize)
NVDAHelper.generateBeep(buf, freq, beepLen, right, left)
bytes = bytearray(buf)
unpacked = struct.unpack("<%dQ" % (bufSize / intSize), bytes)
result = map(operator.add, result, unpacked)
maxInt = 1 << (8 * intSize)
result = map(lambda x : x %maxInt, result)
packed = struct.pack("<%dQ" % (bufSize / intSize), *result)
tones.player.feed(packed)
