IWMReader with custom allocated buffers

[Richard Koch]

I am rendering a movie using the IWMReader interface. It works fine, but I
have performance problems. After optimizing all I could, I now want to create
my own buffers for the samples which should be used by the reader. I think I
made all according to the description which is given in the SDK.
I implemented the IWMReaderCallbackAdvanced interface and defined its
methods. I set SetAllocateForOutput() to TRUE which should cause the reader
to call the AllocateForOutput callback, but the reader doesn't. Why? What
have I missed? Is there a source code available?

Thanks for help,
Richard

[Richard Koch]

I have found out that GetAllocateForOutput() called after
SetAllocateForOutput(TRUE) return FALSE, so the reader has not accepted my
wish. Why?

Thanks, Richard

Post by Richard Koch
I am rendering a movie using the IWMReader interface. It works fine, but I
have performance problems. After optimizing all I could, I now want to create
my own buffers for the samples which should be used by the reader. I think I
made all according to the description which is given in the SDK.
I implemented the IWMReaderCallbackAdvanced interface and defined its
methods. I set SetAllocateForOutput() to TRUE which should cause the reader
to call the AllocateForOutput callback, but the reader doesn't. Why? What
have I missed? Is there a source code available?
Thanks for help,
Richard

[Alessandro Angeli]

From: "Richard Koch"

Post by Richard Koch
I have found out that GetAllocateForOutput() called after
SetAllocateForOutput(TRUE) return FALSE, so the reader has not
accepted my wish. Why?

Did you check the result code of the call?

[Richard Koch]

Yes sure. It was S_OK.

Post by Alessandro Angeli
From: "Richard Koch"

Post by Richard Koch
I have found out that GetAllocateForOutput() called after
SetAllocateForOutput(TRUE) return FALSE, so the reader has not
accepted my wish. Why?

Did you check the result code of the call?
--
// Alessandro Angeli
// MVP :: DirectShow / MediaFoundation
// mvpnews at riseoftheants dot com
// http://www.riseoftheants.com/mmx/faq.htm
.

[Alessandro Angeli]

Replied in m.p.win32.p.dx.video.