Missing magicyuv benchmark. On 7/17/20, Steinar H. Gunderson <steinar+ffm...@gunderson.no> wrote: > Change BitBuf into uint64_t on all supported 64-bit platforms. > This means we need to flush the buffer less often, which is a > significant speed win. 32-bit platforms are unchanged. > Output bitstream is the same. > > All API constraints are kept in place, e.g., you still cannot put_bits() > more than 31 bits at a time. This is so that codecs cannot accidentally > become 64-bit-only or similar. > > Benchmarking on transcoding to various formats shows consistently > positive results: > > dnxhd 25.60 fps -> 26.26 fps ( +2.6%) > dvvideo 24.88 fps -> 25.17 fps ( +1.2%) > ffv1 14.32 fps -> 14.58 fps ( +1.8%) > huffyuv 58.75 fps -> 63.27 fps ( +7.7%) > jpegls 6.22 fps -> 6.34 fps ( +1.8%) > mjpeg 48.65 fps -> 49.01 fps ( +0.7%) > mpeg1video 76.41 fps -> 77.01 fps ( +0.8%) > mpeg2video 75.99 fps -> 77.43 fps ( +1.9%) > mpeg4 80.66 fps -> 81.37 fps ( +0.9%) > prores 12.35 fps -> 12.88 fps ( +4.3%) > prores_ks 16.20 fps -> 16.80 fps ( +3.7%) > rv20 62.80 fps -> 62.99 fps ( +0.3%) > utvideo 68.41 fps -> 76.32 fps (+11.6%) > > Note that this includes video decoding and all other encoding work, > such as DCTs. If you isolate the actual bit-writing routines, it is > likely to be much more. > > Benchmark details: Transcoding the first 30 seconds of Big Buck Bunny > in 1080p, Haswell 2.1 GHz, GCC 8.3, generally quantizer locked to > 5.0. (Exceptions: DNxHD needs fixed bitrate, and JPEG-LS is so slow > that I only took the first 10 seconds, not 30.) All runs were done > ten times and single-threaded, top and bottom two results discarded to > get rid of outliers, arithmetic mean between the remaining six. > --- > libavcodec/put_bits.h | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/libavcodec/put_bits.h b/libavcodec/put_bits.h > index c6a8f3ac14..d09c998991 100644 > --- a/libavcodec/put_bits.h > +++ b/libavcodec/put_bits.h > @@ -32,9 +32,15 @@ > #include "libavutil/intreadwrite.h" > #include "libavutil/avassert.h" > > +#if ARCH_AARCH64 || ARCH_IA64 || ARCH_MIPS64 || ARCH_SPARC64 || ARCH_X86_64 > +typedef uint64_t BitBuf; > +#define AV_WBBUF AV_WB64 > +#define AV_WLBUF AV_WL64 > +#else > typedef uint32_t BitBuf; > #define AV_WBBUF AV_WB32 > #define AV_WLBUF AV_WL32 > +#endif > > static const int BUF_BITS = 8 * sizeof(BitBuf); > > -- > 2.20.1 > > _______________________________________________ > 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". _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
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