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FFmpeg/libswscale

History

Andreas Rheinhardt 888a02a126 swscale/output: Don't call av_pix_fmt_desc_get() in a loop ... 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>		2 years ago
..
aarch64	…
arm	…
loongarch	swscale/la: Add output_lasx.c file.	2 years ago
ppc	…
tests	…
x86	…
Makefile	…
alphablend.c	…
bayer_template.c	…
gamma.c	…
half2float.c	…
hscale.c	…
hscale_fast_bilinear.c	…
input.c	swscale/input: Avoid calls to av_pix_fmt_desc_get()	2 years ago
libswscale.v	…
log2_tab.c	…
options.c	…
output.c	swscale/output: Don't call av_pix_fmt_desc_get() in a loop	2 years ago
rgb2rgb.c	swscale/la: Add yuv2rgb_lasx.c and rgb2rgb_lasx.c files	2 years ago
rgb2rgb.h	swscale/la: Add yuv2rgb_lasx.c and rgb2rgb_lasx.c files	2 years ago
rgb2rgb_template.c	…
slice.c	…
swscale.c	swscale/la: Optimize hscale functions with lasx.	2 years ago
swscale.h	…
swscale_internal.h	swscale/la: Optimize hscale functions with lasx.	2 years ago
swscale_unscaled.c	…
swscaleres.rc	…
utils.c	swscale/la: Optimize hscale functions with lasx.	2 years ago
version.c	…
version.h	…
version_major.h	…
vscale.c	…
yuv2rgb.c	swscale/la: Add yuv2rgb_lasx.c and rgb2rgb_lasx.c files	2 years ago