source: gs3-extensions/web-audio/trunk/js-mad/sink.js-master/src/sinks/cubeb.js@ 28388

void function (Sink) {

var cubeb;

try {
    cubeb = require('cubeb');
} catch (e) {
    return;
}

var getContext = function () {
    var ctx;

    return function () {
        ctx = new cubeb.Context(
            "sink.js " + process.pid + ' ' + new Date()
        );

        getContext = function () { return ctx; };

        return ctx;
    };
}();

var streamCount = 0;

Sink.sinks('cubeb', function () {
    var self = this;

    self.start.apply(self, arguments);

    self._ctx = getContext();
    self._stream = new cubeb.Stream(
        self._ctx,
        self._ctx.name + ' ' + streamCount++,
        cubeb.SAMPLE_FLOAT32LE,
        self.channelCount,
        self.sampleRate,
        self.bufferSize,
        self._latency,
        function (frameCount) {
            var buffer = new Buffer(
                4 * frameCount * self.channelCount);
            var soundData = new Float32Array(buffer);

            self.process(soundData, self.channelCount);

            self._stream.write(buffer);
            self._stream.release();
        },
        function (state) {}
    );

    self._stream.start();
}, {
    _ctx: null,
    _stream: null,
    _latency: 250,
    bufferSize: 4096,

    kill: function () {
        this._stream.stop();
        this.emit('kill');
    },

    getPlaybackTime: function () {
        return this._stream.position;
    }
});

}(this.Sink);