回复：Re: if we plan to remove TEXTURE_UPLOAD, what will be used instead?

[HalleyZhao]

thanks Matthew。
I know little about totem/gtk3, just wonder why not use waylandsink to render video directly to a wl_surface/wl_sub_surface. it means to create a gtk widget which associates with a wl_sub_surface, it is a child of the main window but skip gl composition inside app.
for a dedicated video player app, texture video is just the favor of developer, not the interest of end-user.

--------------------------------


----- 原始邮件 -----
发件人：Matthew Waters <ystreet00 at gmail.com>
收件人：halleyzhao at sina.com, Discussion of the development of and with GStreamer <gstreamer-devel at lists.freedesktop.org>
主题：Re: if we plan to remove TEXTURE_UPLOAD, what will be used instead?
日期：2019年09月11日 17点10分


  
  
    Hi,

      

      1. clutter is effectively unmaintained and is really the only
      major user of the gl upload meta so the first move is to remove
      the clutter dependency inside totem.  There are replacement Gtk
      sink elements (gtkglsink and gtksink) for Gtk3 that can be used. 
      For Gtk4, the equivalent elements would need to written.

      2. The general case for OpenGL within a Gstreamer context is to
      use the libgstgl-1.0 library and the associated elements
      (glupload, glcolorconvert, etc).  One can pass OpenGL textures
      between elements using GstGLMemory with much more information than
      was ever possible with the upload meta. Currently libgstgl does
      include a upload meta implementation however that implementation
      will only be used if nothing else is found (except for upload from
      system memory).

      

      Cheers

      -Matt

      

      On 11/9/19 6:24 pm, HalleyZhao wrote:

    
    
      
      Hi experts:
      from the following thread, I notice that community plans to
        remove TEXTURE_UPLOAD/GstGLUploadTextureMeta.
      then what will be used instead?
      take totem as example, it is problemtic to use clutter-sink
        with hardware accerelated decoder.
      then what's the decent way to render video in totem?
      

      
      

      
      https://gitlab.freedesktop.org/gstreamer/gstreamer-vaapi/issues/137
      
        Maintainer
      
      
        
          
            
              TEXTURE_UPLOAD as
                deprecated for next gst 1.18
            
            TEXTURE_UPLOAD is
              planned to be removed for 2.0
            I removed
              TEXTURE_UPLOAD support in Wayland from gstreamer-vaapi for
              release 1.14, if I recall correctly, but for Canonical it
              was a regression, and Daniel van Vught devoted a lot of
              time to make it work, but as we confirm now, only for
              Intel's driver.
            We are devoting a
              lot of time supporting a deprecated transfer mechanism
              because people demand it. Every time I think about it, I
              realized that I have said "no" when Daniel pushed for it.
            

            
          
        
      
      --------------------------------

      
      

      
      

      
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