[FFmpeg-devel] [PATCH 3/3] lavc/aarch64: hevc_add_res add 12bit variants

[Martin Storsjö]

On Thu, 23 Jun 2022, J. Dekker wrote:

> hevc_add_res_4x4_12_c: 46.0
> hevc_add_res_4x4_12_neon: 18.7
> hevc_add_res_8x8_12_c: 194.7
> hevc_add_res_8x8_12_neon: 25.2
> hevc_add_res_16x16_12_c: 716.0
> hevc_add_res_16x16_12_neon: 69.7
> hevc_add_res_32x32_12_c: 3820.7
> hevc_add_res_32x32_12_neon: 261.0
>
> Signed-off-by: J. Dekker <jdek at itanimul.li>
> ---
> libavcodec/aarch64/hevcdsp_idct_neon.S    | 148 ++++++++++++----------
> libavcodec/aarch64/hevcdsp_init_aarch64.c |  34 ++---
> 2 files changed, 97 insertions(+), 85 deletions(-)

LGTM. The patch is a bit hard to inspect thoroughly (to see exactly how 
little has changed) due to the functions being moved around at the same 
time as they're modified, but I checked and the changes do look fine.

By splitting things up in individual macros for each function, (e.g. 
add_res_4x4, add_res_8x8 etc, then add_res setting the mask and calling 
the others) you could keep the code in place and make the diff even easier 
to read, but it's not strictly necessary.

// Martin