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Quality-Control Management

Quality control is a mechanism for adjusting the rate of data flow through the filter graph in response to run-time performance. If a renderer filter is receiving too much data or too little data, it can send a quality message. The quality message requests an adjustment in the data rate. By default, quality messages travel upstream from the renderer until they reach a filter that can respond (if any). An application can also implement a custom quality manager. In that case, the renderer passes quality messages directly to the application's quality manager.

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Data Flow for Filter Developers
Writing DirectShow Filters

 

 

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