~ubuntu-branches/ubuntu/lucid/ffmpeg/lucid-updates

« back to all changes in this revision

Viewing changes to doc/optimization.txt

• browse files at revision 24
• compare with another revision
• download diff
• download tarball
• view history from revision 24

Show diffs side-by-side

added

removed

doc/optimization.txt

4

4

What to optimize:

5

5

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

6

6

If you plan to do non-x86 architecture specific optimizations (SIMD normally),

7

 

then take a look in the i386/ directory, as most important functions are

 

7

then take a look in the x86/ directory, as most important functions are

8

8

already optimized for MMX.

9

9

 

10

10

If you want to do x86 optimizations then you can either try to finetune the

11

 

stuff in the i386 directory or find some other functions in the C source to

 

11

stuff in the x86 directory or find some other functions in the C source to

12

12

optimize, but there aren't many left.

13

13

 

14

14

 

18

18

of optimizations, it can be hard to optimize them further, or write

19

19

architecture-specific versions. It is recommended to look at older

20

20

revisions of the interesting files (for a web frontend try ViewVC at

21

 

http://svn.mplayerhq.hu/ffmpeg/trunk/).

 

21

http://svn.ffmpeg.org/ffmpeg/trunk/).

22

22

Alternatively, look into the other architecture-specific versions in

23

 

the i386/, ppc/, alpha/ subdirectories. Even if you don't exactly

 

23

the x86/, ppc/, alpha/ subdirectories. Even if you don't exactly

24

24

comprehend the instructions, it could help understanding the functions

25

25

and how they can be optimized.

26

26

 

• Older »

Loggerhead is a web-based interface for Breezy
Version: 2.0.1