Please provide a VFP-optimised build for ffmpeg-debian
Bug #349458 reported by
Emmet Hikory
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
ffmpeg-debian (Ubuntu) |
Fix Released
|
Medium
|
Emmet Hikory | ||
Jaunty |
Fix Released
|
Medium
|
Emmet Hikory |
Bug Description
Some ARM processors support vector floating point, which can cause significant improvements in the performance of floating point code. As this must be selected at compile-time, with the -mfpu=vfp CFLAG, this requires a special build.
For performance reasons on such hardware, please enable such a build for ffmpeg-debian for jaunty.
Changed in ffmpeg-debian: | |
assignee: | nobody → persia |
status: | New → In Progress |
Changed in ffmpeg-debian: | |
milestone: | none → ubuntu-9.04 |
Changed in ffmpeg-debian (Ubuntu Jaunty): | |
importance: | Undecided → Medium |
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This is probably one of the few libs where many versions is granted (since the upstream provides excellent hand-optimised routines):
-armv5
-armv6+vfp
-armv7+neon
This leaves suboptimal cases for armv5+vfp users (kirkwood) and armv6 without vfp (nothing significant). Neither of these cases are on multimedia-oriented devices (at least for now), so it should be acceptable tradeoff.