> -----Original Message-----
> From: ffmpeg-devel [mailto:ffmpeg-devel-boun...@ffmpeg.org] On Behalf Of
> James Almer
> Sent: Tuesday, September 17, 2019 09:56 PM
> To: ffmpeg-devel@ffmpeg.org
> Subject: Re: [FFmpeg-devel] [PATCH 3/3] avfilter/x86/vf_eq: add SSE2 version
>
> On 9/17/2019 10:39 AM, Ting Fu wrote:
> > Signed-off-by: Ting Fu <ting...@intel.com>
> > ---
> > libavfilter/x86/vf_eq.asm | 19 +++++++++++++++++--
> > libavfilter/x86/vf_eq_init.c | 20 ++++++++++++++++++++
> > 2 files changed, 37 insertions(+), 2 deletions(-)
> >
> > diff --git a/libavfilter/x86/vf_eq.asm b/libavfilter/x86/vf_eq.asm
> > index bf28691297..d6b51cf6df 100644
> > --- a/libavfilter/x86/vf_eq.asm
> > +++ b/libavfilter/x86/vf_eq.asm
> > @@ -24,14 +24,21 @@
> >
> > SECTION .text
> >
> > -INIT_MMX mmx
> > +%macro PROCESS_ONE_LINE 1
> > cglobal process_one_line, 5, 7, 5, src, dst, contrast, brightness, w
> > movd m3, contrastd
> > movd m4, brightnessd
> > movsx r5d, contrastw
> > movsx r6d, brightnessw
> > +%if mmsize == 8
> > pshufw m3, m3, 0
> > pshufw m4, m4, 0
>
> pshufw isn't mmx, but mmxext (AKA, integer SSE). Hardly a problem since i
> don't
> think anyone using a Pentium 2 will use this filter, but still it's
> technically wrong.
>
> The function should be changed into mmxext to reflect the above.
>
Thank you for your reviw. It's ture that pshufw belongs to mmxext, and I have
updated the related codes.
> > +%elif mmsize == 16
> > + pshuflw m3, m3, 0
> > + movlhps m3, m3
> > + pshuflw m4, m4, 0
> > + movlhps m4, m4
> > +%endif
>
> You can use the SPLATW macro instead. It will expand to the correct
> instructions
> based on what set is enabled.
Yes, the SPLATW macro can totally replace the instructions above. Sorry, I
didn't know before.
And I have replaced above codes with SPLATW in PATCH V2.
>
> >
> > DEFINE_ARGS src, dst, tmp, scalar, w
> > xor tmpd, tmpd
> > @@ -39,7 +46,7 @@ cglobal process_one_line, 5, 7, 5, src, dst, contrast,
> brightness, w
> > pxor m1, m1
> > mov scalard, wd
> > and scalard, mmsize-1
> > - sar wd, 3
> > + sar wd, %1
> > cmp wd, 1
> > jl .loop1
> >
> > @@ -80,3 +87,11 @@ cglobal process_one_line, 5, 7, 5, src, dst,
> > contrast, brightness, w
> >
> > .end:
> > RET
> > +
> > +%endmacro
> > +
> > +INIT_MMX mmx
> > +PROCESS_ONE_LINE 3
> > +
> > +INIT_XMM sse2
> > +PROCESS_ONE_LINE 4
> > diff --git a/libavfilter/x86/vf_eq_init.c
> > b/libavfilter/x86/vf_eq_init.c index 63c69078fb..cdd5272220 100644
> > --- a/libavfilter/x86/vf_eq_init.c
> > +++ b/libavfilter/x86/vf_eq_init.c
> > @@ -28,6 +28,8 @@
> >
> > extern void ff_process_one_line_mmx(const uint8_t *src, uint8_t *dst, int
> contvec,
> > int brvec, int w);
> > +extern void ff_process_one_line_sse2(const uint8_t *src, uint8_t *dst, int
> contvec,
> > + int brvec, int w);
> >
> > static void process_mmx(EQParameters *param, uint8_t *dst, int dst_stride,
> > const uint8_t *src, int src_stride, int w,
> > int h) @@ -44,6 +46,21 @@ static void process_mmx(EQParameters *param,
> uint8_t *dst, int dst_stride,
> > emms_c();
> > }
> >
> > +static void process_sse2(EQParameters *param, uint8_t *dst, int dst_stride,
> > + const uint8_t *src, int src_stride, int w,
> > +int h) {
> > + short contrast = (short) (param->contrast * 256 * 16);
> > + short brightness = ((short) (100.0 * param->brightness + 100.0) * 511)
> > + / 200 - 128 - contrast / 32;
> > +
> > + while (h--) {
> > + ff_process_one_line_sse2(src, dst, contrast, brightness, w);
> > + src += src_stride;
> > + dst += dst_stride;
> > + }
> > + emms_c();
>
> No need for this since the SSE2 version uses xmm regs.
>
Of course the xmm registers no longer need the emms_c(), my mistake.
Thank for your review again and I have post PATH V2 to ffmpeg-devel.
It's welcome to take a further look.
> > +}
> > +
> > av_cold void ff_eq_init_x86(EQContext *eq) {
> > int cpu_flags = av_get_cpu_flags(); @@ -51,5 +68,8 @@ av_cold
> > void ff_eq_init_x86(EQContext *eq)
> > if (cpu_flags & AV_CPU_FLAG_MMX) {
> > eq->process = process_mmx;
> > }
> > + if (cpu_flags & AV_CPU_FLAG_SSE2) {
> > + eq->process = process_sse2;
> > + }
> > }
> >
> >
>
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