libav: Video decoder push buffer mapped in READ/WRITE
Submitted by Nicolas Dufresne @ndufresne
Link to original bug (#740222)
Description
While looking into adding features in glbufferpool to allow liav direct rendering to work, I notice that avviddec was actually mapping buffers
in READ/WRITE. When memory a GL textures, this would cause a download
to occur.
Version: 1.4.4