disable SIMD acceleration

Question

disable SIMD acceleration

Opened this issue 9 years ago · 4 comments

hi,
is there any possibility to compile the decoder without NEON extensions on ARM (or SSE on x86)? The -a option on the command line parameters does not seem to do anything...

Answer 1 · 2015-08-27T08:31:31.000Z

Hi,
AFAIK there is no clean way to do that. Nevertheless you can comment the following line in "libavcodec/hevcdsp.c":
if (ARCH_ARM) ff_hevcdsp_init_arm(hevcdsp, bit_depth);
In "libavcodec/cabac_functions.h" you can comment the following include:
# include "arm/cabac.h"

There is the same thing for ARCH_X86.

I Hope it will help.

Answer 2 · 2015-08-27T08:35:19.000Z

i'll try that , thanks!

Answer 3 · 2015-08-28T07:46:10.000Z

Hi,
actually there is no cabac.h file in arm folder and no "# include "arm/cabac.h" line in "libavcodec/cabac_functions.h. I used the branch hevc_arm, isn't it the one that has the NEON commands working?

Answer 4 · 2015-08-28T08:15:38.000Z

It was but currently I suggest you try shm-dev branch.