From: Nelson Gomez <nelson.go...@microsoft.com> v3: - Fixed x86_32 compilation
v2: [2] - Addressing comments James left on iter. 1 - Cleaned up how dither gets read to avoid using stack space v1: [1] [1] http://ffmpeg.org/pipermail/ffmpeg-devel/2020-April/261313.html [2] http://ffmpeg.org/pipermail/ffmpeg-devel/2020-April/261346.html This patchset aims to optimize yuv2nv12cX_c for Intel/AMD chips by adding an AVX2 implementation of it. To support this change, the typedef declaration for yuv2interleavedX_fn has been changed to pass two additional parameters for chrDither8 and dstFormat rather than passing a pointer to the entire SwsContext. Output is bit-identical to the software implementation. Patchset validated on an Intel Xeon W-2133, Core i7-8650U, and an AMD Ryzen 1700. Passes fate tests; this patch is exercised by fate-filter-pixdesc-nv{12,21,24,42}. Benchmarks measured on the W-2133. Flags used are: -benchmark -i /dev/shm/benchmark.mp4 -pix_fmt nv42 -f null - Benchmark material is a yuv420p file: http://linux.microsoft.com/~negomez/ffmpeg/yuv420p-benchmark.mp4 Results: * Single-threaded conversion: +95% fps -cpuflags -avx2 -threads 1: frame= 9959 fps=114 q=-0.0 Lsize=N/A time=00:05:32.29 bitrate=N/A speed=3.79x bench: utime=87.648s stime=0.060s rtime=87.709s bench: maxrss=35020kB -cpuflags all -threads 1: frame= 9959 fps=222 q=-0.0 Lsize=N/A time=00:05:32.29 bitrate=N/A speed=7.39x bench: utime=44.900s stime=0.040s rtime=44.941s bench: maxrss=33048kB * Multi-threaded conversion: +197% fps -cpuflags -avx2: frame= 9959 fps=159 q=-0.0 Lsize=N/A time=00:05:32.29 bitrate=N/A speed=5.3x bench: utime=90.381s stime=0.430s rtime=62.663s bench: maxrss=77420kB -cpuflags all: frame= 9959 fps=473 q=-0.0 Lsize=N/A time=00:05:32.29 bitrate=N/A speed=15.8x bench: utime=48.625s stime=0.459s rtime=21.058s bench: maxrss=78500kB Nelson Gomez (3): swscale: make yuv2interleavedX more asm-friendly swscale/x86/output: add AVX2 version of yuv2nv12cX swscale: cosmetic fixes libswscale/output.c | 19 ++--- libswscale/swscale_internal.h | 6 +- libswscale/vscale.c | 2 +- libswscale/x86/output.asm | 126 +++++++++++++++++++++++++++++++++- libswscale/x86/swscale.c | 28 ++++++++ 5 files changed, 168 insertions(+), 13 deletions(-) -- 2.25.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
