def writeframes(self, data):
import time
from Carbon.Sound import bufferCmd, callBackCmd, extSH
import struct
import MacOS
if not self._chan:
from Carbon import Snd
self._chan = Snd.SndNewChannel(5, 0, self._callback)
nframes = len(data) / self._nchannels / self._sampwidth
if len(data) != nframes * self._nchannels * self._sampwidth:
raise error, 'data is not a whole number of frames'
while self._gc and self.getfilled(
) + nframes > self._qsize / self._nchannels / self._sampwidth:
time.sleep(0.1)
if self._sampwidth == 1:
import audioop
data = audioop.add(data, '\x80' * len(data), 1)
h1 = struct.pack('llHhllbbl',
id(data) + MacOS.string_id_to_buffer, self._nchannels,
self._outrate, 0, 0, 0, extSH, 60, nframes)
h2 = 22 * '\x00'
h3 = struct.pack('hhlll', self._sampwidth * 8, 0, 0, 0, 0)
header = h1 + h2 + h3
self._gc.append((header, data))
self._chan.SndDoCommand((bufferCmd, 0, header), 0)
self._chan.SndDoCommand((callBackCmd, 0, 0), 0)
def writeframes(self, data):
if not self.__format or not self.__outrate:
raise Error, 'params not specified'
if not self.__chan:
self.__chan = Snd.SndNewChannel(5, 0, self.__callback)
nframes = len(data) / self.__nchannels / self.__sampwidth
if len(data) != nframes * self.__nchannels * self.__sampwidth:
raise error, 'data is not a whole number of frames'
while self.__gc and \
self.getfilled() + nframes > self.__qsize:
time.sleep(0.1)
h1 = struct.pack(
'llHhllBb',
id(data) + MacOS.string_id_to_buffer, # ARGH!!! HACK, HACK!
self.__nchannels,
self.__outrate,
0,
0,
0,
extSH,
60)
h2 = struct.pack('l', nframes)
h3 = 22 * '\0'
h4 = struct.pack('hhlll', self.__sampwidth * 8, 0, 0, 0, 0)
header = h1 + h2 + h3 + h4
self.__gc.append((header, data))
self.__chan.SndDoCommand((bufferCmd, 0, header), 0)
self.__chan.SndDoCommand((callBackCmd, 0, 0), 0)
import aifc, audioop
fn = 'f:just samples:2ndbeat.aif'
af = aifc.open(fn, 'r')
print af.getparams()
print 'nframes =', af.getnframes()
print 'nchannels =', af.getnchannels()
print 'framerate =', af.getframerate()
nframes = min(af.getnframes(), 100000)
frames = af.readframes(nframes)
print 'len(frames) =', len(frames)
print repr(frames[:100])
frames = audioop.add(frames, '\x80' * len(frames), 1)
print repr(frames[:100])
import struct
header1 = struct.pack('llhhllbbl', 0, af.getnchannels(), af.getframerate(), 0,
0, 0, 0xFF, 60, nframes)
print repr(header1)
header2 = struct.pack('llhlll', 0, 0, 0, 0, 0, 0)
header3 = struct.pack('hhlll', af.getsampwidth() * 8, 0, 0, 0, 0)
print repr(header3)
header = header1 + header2 + header3
buffer = header + frames
chan = Snd.SndNewChannel(5, 0x00C0)
Snd.SndDoCommand(chan, (bufferCmd, 0, buffer), 0)
QSIZE = 100000
from Carbon.Sound import *
from Carbon import Snd
import aifc, audioop
fn = 'f:just samples:2ndbeat.aif'
af = aifc.open(fn, 'r')
print af.getparams()
print 'nframes =', af.getnframes()
print 'nchannels =', af.getnchannels()
print 'framerate =', af.getframerate()
nframes = min(af.getnframes(), 100000)
frames = af.readframes(nframes)
print 'len(frames) =', len(frames)
print repr(frames[:100])
frames = audioop.add(frames, '\x80' * len(frames), 1)
print repr(frames[:100])
import struct
header1 = struct.pack('llhhllbbl', 0, af.getnchannels(), af.getframerate(), 0,
0, 0, 0xFF, 60, nframes)
print repr(header1)
header2 = struct.pack('llhlll', 0, 0, 0, 0, 0, 0)
header3 = struct.pack('hhlll', af.getsampwidth() * 8, 0, 0, 0, 0)
print repr(header3)
header = header1 + header2 + header3
buffer = header + frames
chan = Snd.SndNewChannel(5, 0x00C0)
Snd.SndDoCommand(chan, (bufferCmd, 0, buffer), 0)
