mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-24 08:12:44 +00:00
888a02a126
Up until now, libswscale/output.c used a macro to write an output pixel which involved a call to av_pix_fmt_desc_get() to find out whether the input pixel format is BE or LE despite this being known at compile-time (there are templates per pixfmt). Even worse, these calls are made in a loop, so that e.g. there are eight calls to av_pix_fmt_desc_get() for every pixel processed in yuv2rgba64_X_c_template() for 64bit RGB formats. This commit modifies these macros to ensure that isBE() is evaluated at compile-time. This saved 41184B of .text for me (GCC 11.2, -O3). Of course, it also improved performance. E.g. ffmpeg_g -f lavfi -i testsrc2,format=yuva420p -pix_fmt rgba64le \ -threads 1 -t 1:00 -f null - (which uses yuv2rgba64le_X_c, which is an invocation of yuv2rgba64_X_c_template() mentioned above), performance improved from 95589 to 41387 decicycles for one call to yuv2packedX; for the be variant the numbers went down from 76087 to 43024 decicycles. Reviewed-by: Anton Khirnov <anton@khirnov.net> Reviewed-by: Paul B Mahol <onemda@gmail.com> Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com> |
||
---|---|---|
.. | ||
aarch64 | ||
arm | ||
loongarch | ||
ppc | ||
tests | ||
x86 | ||
alphablend.c | ||
bayer_template.c | ||
gamma.c | ||
half2float.c | ||
hscale_fast_bilinear.c | ||
hscale.c | ||
input.c | ||
libswscale.v | ||
log2_tab.c | ||
Makefile | ||
options.c | ||
output.c | ||
rgb2rgb_template.c | ||
rgb2rgb.c | ||
rgb2rgb.h | ||
slice.c | ||
swscale_internal.h | ||
swscale_unscaled.c | ||
swscale.c | ||
swscale.h | ||
swscaleres.rc | ||
utils.c | ||
version_major.h | ||
version.c | ||
version.h | ||
vscale.c | ||
yuv2rgb.c |