Morten Hustveit wrote:
Currently, the performance when streaming video through glTexSubImage2D is very low. In my test program and with mplayer, I get approximately 8 fps in 720x576 on my Radeon 7500 with texmem-branch from a couple of weeks ago. glDrawPixels is equally slow. I assume glTexSubImage2D is supposed to be able to process realtime video, since it handles extensions like EXT_422_pixels (for 4:2:2 Y'CbCr) and EXT_interlace.Morten,
Using OpenGL for streaming video is useful for creating nonlinear video editing applications (I think Apple's Shake use OpenGL), because you will be able to preview many of the most common effects in realtime.
Is there any work in progress to make texture sub-image uploading faster? Which changes need to be done?
The R200 driver supports an AGP allocator, but that's for the Radeon 8500 and 9000. You would need to port the allocator (APPLE_client_storage) to the Radeon driver if you wanted to use it on the Radeon 7500.
Regards,
Jens
--
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Jens Owen / \/\ _
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