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class AudioStreamIterable(object):
    CHUNK_SIZE = 8096
    DECODERS = {
            "ogg": ("/usr/bin/oggdec", "-Q", "-o", "-"),
            "flac": ("/usr/bin/flac", "-d", "-c", "--totally-silent"),
            "mp3": ("/usr/bin/mpg123", "-s", "-q"),
        }
    ENCODER = "/usr/bin/oggenc"

    def __init__(self, filename, decoder, bitrate):
        self.filename = filename
        self.bitrate = bitrate
        self.decoder_cmd = list(self.DECODERS[decoder] + (filename, ))
        self.encoder_cmd = [self.ENCODER, "-r", "-Q", "-b", str(bitrate), "-"]

    def __iter__(self):
        self.p1 = subprocess.Popen(self.decoder_cmd, stdout=subprocess.PIPE)
        self.read_fd, self.write_fd = os.pipe()
        self.p2 = subprocess.Popen(self.encoder_cmd, stdin=self.p1.stdout, stdout=os.fdopen(self.write_fd, "wb"))
        fcntl.fcntl(self.read_fd, fcntl.F_SETFL, os.O_NONBLOCK)

class AudioStreamIterable(object):
    chunk_size = 8096
    decoders = {
            "ogg": ("/usr/bin/oggdec", "-Q", "-o", "-"),
            "flac": ("/usr/bin/flac", "-d", "-c", "--totally-silent"),
            "mp3": ("/usr/bin/mpg123", "-s", "-q"),
        }
    encoder = "/usr/bin/oggenc"

    def __init__(self, filename, bitrate):
        self.filename = filename
        self.bitrate = bitrate
        name, found, suffix = filename.rpartition(".")
        self.decoder_cmd = list(self.decoders[suffix] + (filename, ))
        self.encoder_cmd = [self.encoder, "-r", "-Q", "-b", str(bitrate), "-"]

    def __iter__(self):
        self.p1 = subprocess.Popen(self.decoder_cmd, stdout=subprocess.PIPE)
        self.read_fd, self.write_fd = os.pipe()