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.

This article contains the following topics.

Data Flow for Filter Developers

Writing DirectShow Filters