如何同步线程以捕获相同数量的帧？

时间：2012-12-09 02:58:30

标签： c++ multithreading synchronization kinect

我正在开发一个Kinect应用程序。我有两个线程，一个用于读取关节的值（包含20个关节的x，y，z坐标），另一个用于读取深度值（每帧76800个短值）。我正在记录这些值，从按下我的开始按钮直到按下结束按钮。我期望写出相同数量的关节和深度帧，但我总是以很多关节框架结束。我捕获150深度帧但180关节帧，我认为这是因为深度写入缓冲区的数据量。联合只需在每个框架中写入60个浮动但深度为76800个短裤。

如何从每个帧捕获相等数量的帧？ （Kinect捕获深度和25至30 FPS的坐标）

此日志还显示调用的每个线程的数量不相等：

112/11/9 4:19:58: SKELETON

112/11/9 4:19:58: DEPTH

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1 个答案:

答案 0 :(得分：0)

拥有一个由锁和条件变量保护的共享表，该变量保持已捕获的每种类型的帧数。如果任一线程看到它捕获的帧数多于另一个，则让它阻塞条件变量。当任一线程完成获取帧时，它会增加其类型的计数并广播条件变量。

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