Matrox M264, Инструкция по установке и эксплуатации

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32
Chapter 6, Using the Matrox M264 Hardware Codecs
12
If the decoded data needs to be processed, each surface sent to the decoder using
IMvDecoderVideo::GetUncompressedVideoAndVANCSurface()
must
be kept by the user application. To do this, the user application must wait for the
write completion event of the surface to be signaled. The decoder will signal the
write completion event of the surface once it has finished decompressing a frame
into the surface. When a write completion event is signaled, the user application
can process the video data referenced by the surface.
¦ Note
If the user application does not need to process the decoded data, it can be
sent to another Flex module.
13
After all the compressed data has been sent to the decoder, call
IMvDecoder::Flush()
to notify the decoder that no more compressed data will
be sent.
Remarks
$
The user application will be notified by the notification callback when the
decoder has decompressed all the compressed data.
$
Continue calling
IMvDecoderVideo::
GetUncompressedVideoAndVANCSurface()
until the notification
callback is called.
$
After calling
IMvDecoder::Flush()
, you can no longer call
IMvDecoderVideo::PutCompressedSurface()
.
14 When NULL is returned, release the two notification callbacks by calling
IMvDecoderVideo::SetOption()
with the
keMvCodecOptionCompletionCallback_pI parameter and the
keMvCodecOptionAsynchErrorCallback_pI parameter.
15
Call
IMvDecoderVideo::Close()
to close the codec when finished.
¦ Note
After calling this method, all surfaces sent to the decoder using
IMvDecoderVideo::GetUncompressedVideoAndVANCSurface()
will be
cancelled.