Working with Streaming Resources
[The feature associated with this page, Windows Media Player SDK, is a legacy feature. It has been superseded by MediaPlayer. MediaPlayer has been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer instead of Windows Media Player SDK, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The sample audio DSP plug-in project generated by the Windows Media Player Plug-in Wizard does not require any streaming resources to be allocated by the plug-in. The Echo sample, however, requires a separate buffer to hold the audio data for a period of time to create the delay effect. The buffer is managed by two methods: IMediaObject::AllocateStreamingResources, which creates the buffer, and IMediaObject::FreeStreamingResources, which releases the buffer. The IMediaObject methods are implemented in Echo.cpp.
The following sections provide further information about managing the buffers:
- Variables to Manage the Delay Buffer
- Implementing IMediaObject::AllocateStreamingResources
- Implementing IMediaObject::FreeStreamingResources
Related topics