1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

WebM, Theora Acceleration Talked About For Gallium3D

Mesa

Published on 26 March 2011 09:59 AM EDT
Written by Michael Larabel in Mesa
10 Comments

Earlier this week I mentioned a student developer looking to partake in Google's Summer of Code was interested in creating an H.264 state tracker for Gallium3D whereby any graphics card with a Gallium3D driver could have H.264 video decoding support using VA-API / VDPAU and accelerating the operations in shaders on the GPU, where in theory at least it would be universally supported across all drivers on this architecture. It's still looking hopeful that this will be hacked on this summer, but a few interesting points have been expressed.

Mesa developers haven't shot down this GSoC proposal like they effectively did with the OpenGL 4.1 state tracker proposal two weeks back over that being too ambitious for a single student to do in one summer. In fact, the Mesa developers seem fairly interested in such a video acceleration state tracker happening. As mentioned in previous articles, the only work done in this area on Gallium3D already has been for XvMC and MPEG with mixed success.

Christian K├Ânig, the developer that has been working on XvMC for the R600g driver is excited about the possibility of another developer now working on "pipe-video", the branch of Mesa where this video acceleration for Gallium3D is being developed.

Other points that have been talked about for this work in recent days include:

- Shader-based video acceleration is still not ideal when modern graphics cards have dedicated units for encoding/decoding video. Unfortunately, these implementations like AMD UVD2 and NVIDIA PureVideo are not publicly documented and would require hardware-specific work.
- One opportunity instead of -- or to complement -- the H.264 video acceleration would be to target the WebM / VP8 or Theora formats. The video decoding hardware that's out there now doesn't support these open formats so it's all CPU bound for now, so working on WebM video acceleration for Gallium3D would be an original creation. Much of the work needed to target H.264, WebM / VP8, and Theora would be code that could be shared across formats.
- In terms of whether to target the VA-API or VDPAU API for such a state tracker, the consensus seems to be on using NVIDIA's Video Decode and Presentation API for Unix. It also appears that it would be easier to extend VDPAU than VA-API for handling new formats like Google's WebM.
- It was also mentioned there is someone working on WebM support over OpenCL (see the GitHub), but that's currently slower than a CPU-based solution and the open-source drivers currently don't have OpenCL support.

Let's hope this Google Summer of Code proposal is accepted and that it manages to materialize this summer into something useful.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. 13-Way Low-End GPU Comparison With AMD's AM1 Athlon
  2. ASUS AM1I-A: A Mini-ITX Board For Socketed Kabini APUs
  3. Mini-Box M350: A Simple, Affordable Mini-ITX Case
  4. Overclocking The AMD AM1 Athlon & Sempron APUs
Latest Linux Articles
  1. Ubuntu 12.04 LTS vs. 14.04 LTS Cloud Benchmarks
  2. Ubuntu 12.04.4 vs. 13.10 vs. 14.04 LTS Desktop Benchmarks
  3. AMD OpenCL Performance With AM1 Kabini APUs
  4. A Quick Look At GCC 4.9 vs. LLVM Clang 3.5
Latest Linux News
  1. Borderlands Is Being Considered For Linux
  2. Mesa 10.0 & 10.1 Stable Get Updated
  3. Getting Hit By The Variable Performance Of The Public Cloud
  4. Git 2.0 Test Releases Begin With Many Changes
  5. Wine 1.7.17 Works On Its Task Scheduler, C Run-Time
  6. The Improv ARM Board Still Isn't Shipping; Riding A Dead Horse?
  7. Debian To Maintain 6.0 Squeeze As An LTS Release
  8. Wasteland 2 Is Finally Released For Linux Gamers
  9. FreeBSD Advances For ARM, Bhyve, Clang
  10. Ubuntu 14.04 LTS "Trusty Tahr" Officially Released
  11. Ubuntu 12.04 LTS vs. 14.04 LTS Server Benchmarks
  12. QEMU 2.0 Released With ARM, x86 Enhancements
Latest Forum Discussions
  1. Suggestions about how to make a Radeon HD 7790 work decently?
  2. Updated and Optimized Ubuntu Free Graphics Drivers
  3. The GNOME Foundation Is Running Short On Money
  4. Radeon 8000M problematic on Linux?
  5. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  6. After Jack Keane, RuseSoft will briing Ankh 3 to Linux through Desura
  7. Suspected PHP Proxy Issue
  8. Change installation destination from home directory