[FFmpeg-devel] [PATCH 02/10] diracdsp: add dequantization SIMD
Rostislav Pehlivanov
atomnuker at gmail.com
Fri Jun 24 13:43:27 CEST 2016
On 23 June 2016 at 21:01, James Almer <jamrial at gmail.com> wrote:
> On 6/23/2016 2:06 PM, Rostislav Pehlivanov wrote:
> > Currently unused, to be used in the following commits.
> >
> > Signed-off-by: Rostislav Pehlivanov <rpehlivanov at obe.tv>
> > ---
> > libavcodec/diracdsp.c | 24 ++++++++++++++++++++++++
> > libavcodec/diracdsp.h | 4 ++++
> > libavcodec/x86/diracdsp.asm | 41
> +++++++++++++++++++++++++++++++++++++++++
> > libavcodec/x86/diracdsp_init.c | 4 +++-
> > 4 files changed, 72 insertions(+), 1 deletion(-)
> >
> > diff --git a/libavcodec/diracdsp.c b/libavcodec/diracdsp.c
> > index ab8d149..d0cfd00 100644
> > --- a/libavcodec/diracdsp.c
> > +++ b/libavcodec/diracdsp.c
> > @@ -189,6 +189,27 @@ static void add_rect_clamped_c(uint8_t *dst, const
> uint16_t *src, int stride,
> > }
> > }
> >
> > +#define DEQUANT_SUBBAND(PX)
> \
> > +static void dequant_subband_ ## PX ## _c(uint8_t *src, uint8_t *dst,
> ptrdiff_t stride, \
> > + const int qf, const int qs,
> int64_t tot_v, int64_t tot_h) \
>
> Shouldn't this be int (or ptrdiff_t)? Seeing they are int in the
> SliceCoeffs struct introduced by patch 6, i don't see why they
> should be int64_t here. Unless I'm missing something.
>
> > +{
> \
> > + int i, y;
> \
> > + for (y = 0; y < tot_v; y++) {
> \
> > + PX c, sign, *src_r = (PX *)src, *dst_r = (PX *)dst;
> \
> > + for (i = 0; i < tot_h; i++) {
> \
> > + c = *src_r++;
> \
> > + sign = FFSIGN(c)*(!!c);
> \
> > + c = (FFABS(c)*qf + qs) >> 2;
> \
> > + *dst_r++ = c*sign;
> \
> > + }
> \
> > + src += tot_h << (sizeof(PX) >> 1);
> \
> > + dst += stride;
> \
> > + }
> \
> > +}
> > +
> > +DEQUANT_SUBBAND(int16_t)
> > +DEQUANT_SUBBAND(int32_t)
> > +
> > #define PIXFUNC(PFX, WIDTH)
> \
> > c->PFX ## _dirac_pixels_tab[WIDTH>>4][0] = ff_ ## PFX ##
> _dirac_pixels ## WIDTH ## _c; \
> > c->PFX ## _dirac_pixels_tab[WIDTH>>4][1] = ff_ ## PFX ##
> _dirac_pixels ## WIDTH ## _l2_c; \
> > @@ -214,6 +235,9 @@ av_cold void ff_diracdsp_init(DiracDSPContext *c)
> > c->biweight_dirac_pixels_tab[1] = biweight_dirac_pixels16_c;
> > c->biweight_dirac_pixels_tab[2] = biweight_dirac_pixels32_c;
> >
> > + c->dequant_subband[0] = c->dequant_subband[2] =
> dequant_subband_int16_t_c;
> > + c->dequant_subband[1] = c->dequant_subband[3] =
> dequant_subband_int32_t_c;
> > +
> > PIXFUNC(put, 8);
> > PIXFUNC(put, 16);
> > PIXFUNC(put, 32);
> > diff --git a/libavcodec/diracdsp.h b/libavcodec/diracdsp.h
> > index 25a872d..c0ac56b 100644
> > --- a/libavcodec/diracdsp.h
> > +++ b/libavcodec/diracdsp.h
> > @@ -22,6 +22,7 @@
> > #define AVCODEC_DIRACDSP_H
> >
> > #include <stdint.h>
> > +#include <stddef.h>
> >
> > typedef void (*dirac_weight_func)(uint8_t *block, int stride, int
> log2_denom, int weight, int h);
> > typedef void (*dirac_biweight_func)(uint8_t *dst, const uint8_t *src,
> int stride, int log2_denom, int weightd, int weights, int h);
> > @@ -46,6 +47,9 @@ typedef struct {
> > void (*add_rect_clamped)(uint8_t *dst/*align 16*/, const uint16_t
> *src/*align 16*/, int stride, const int16_t *idwt/*align 16*/, int
> idwt_stride, int width, int height/*mod 2*/);
> > void (*add_dirac_obmc[3])(uint16_t *dst, const uint8_t *src, int
> stride, const uint8_t *obmc_weight, int yblen);
> >
> > + /* 0-1: int16_t and int32_t asm/c, 2-3: int16 and int32_t, C only */
> > + void (*dequant_subband[4])(uint8_t *src, uint8_t *dst, ptrdiff_t
> stride, const int qf, const int qs, int64_t tot_v, int64_t tot_h);
> > +
> > dirac_weight_func weight_dirac_pixels_tab[3];
> > dirac_biweight_func biweight_dirac_pixels_tab[3];
> > } DiracDSPContext;
> > diff --git a/libavcodec/x86/diracdsp.asm b/libavcodec/x86/diracdsp.asm
> > index 9db7b67..f743363 100644
> > --- a/libavcodec/x86/diracdsp.asm
> > +++ b/libavcodec/x86/diracdsp.asm
> > @@ -289,6 +289,46 @@ cglobal add_dirac_obmc%1_%2, 6,6,5, dst, src,
> stride, obmc, yblen
> > RET
> > %endm
> >
> > +%macro DEQUANT_SUBBAND_32 0
> > +; void dequant_subband_32(uint8_t *src, uint8_t *dst, ptrdiff_t stride,
> const int qf, const int qs, int64_t tot_v, int64_t tot_h)
> > +cglobal dequant_subband_32, 7, 9, 4, src, dst, stride, qf, qs, tot_v,
> tot_h
>
> Again, x86_64 only as is.
>
> > +
> > + movd m2, qfd
> > + movd m3, qsd
> > + SPLATD m2
> > + SPLATD m3
> > + neg tot_vq
> > + neg tot_hq
>
> Same as with put_signed_rect_clamped_10, no reason to neg these.
>
> > + mov r7, dstq
> > + mov r8, tot_hq
>
> You have qf and qs free. There's no need to use two extra registers.
> This and changing tot_v and tot_h to int/ptrdiff_t should make it work
> on x86_32 without extra work.
>
> > +
> > + .loop_v:
> > + mov dstq, r7
> > + mov tot_hq, r8
> > +
> > + .loop_h:
> > + movu m0, [srcq]
> > +
> > + pabsd m1, m0
> > + pmulld m1, m2
> > + paddd m1, m3
> > + psrld m1, 2
> > + psignd m1, m0
> > +
> > + movu [dstq], m1
> > +
> > + add srcq, mmsize
> > + add dstq, mmsize
> > + add tot_hq, 4
> > + jl .loop_h
> > +
> > + add r7, strideq
> > + add tot_vq, 1
> > + jl .loop_v
> > +
> > + RET
> > +%endm
> > +
> > INIT_MMX
> > %if ARCH_X86_64 == 0
> > PUT_RECT mmx
> > @@ -310,3 +350,4 @@ ADD_OBMC 16, sse2
> >
> > INIT_XMM sse4
> > PUT_RECT_10
> > +DEQUANT_SUBBAND_32
>
> No reason to make it a macro. It's a single function.
>
> > diff --git a/libavcodec/x86/diracdsp_init.c
> b/libavcodec/x86/diracdsp_init.c
> > index 4786eea..8541eb3 100644
> > --- a/libavcodec/x86/diracdsp_init.c
> > +++ b/libavcodec/x86/diracdsp_init.c
> > @@ -45,9 +45,10 @@ void ff_put_rect_clamped_mmx(uint8_t *dst, int
> dst_stride, const int16_t *src, i
> > void ff_put_rect_clamped_sse2(uint8_t *dst, int dst_stride, const
> int16_t *src, int src_stride, int width, int height);
> > void ff_put_signed_rect_clamped_mmx(uint8_t *dst, int dst_stride, const
> int16_t *src, int src_stride, int width, int height);
> > void ff_put_signed_rect_clamped_sse2(uint8_t *dst, int dst_stride,
> const int16_t *src, int src_stride, int width, int height);
> > -
> > void ff_put_signed_rect_clamped_10_sse4(uint8_t *dst, int dst_stride,
> const uint8_t *src, int src_stride, int width, int height);
> >
> > +void ff_dequant_subband_32_sse4(uint8_t *src, uint8_t *dst, ptrdiff_t
> stride, const int qf, const int qs, int64_t tot_v, int64_t tot_h);
> > +
> > #if HAVE_YASM
> >
> > #define HPEL_FILTER(MMSIZE, EXT)
> \
> > @@ -188,6 +189,7 @@ void ff_diracdsp_init_x86(DiracDSPContext* c)
> > }
> >
> > if (EXTERNAL_SSE4(mm_flags)) {
> > + c->dequant_subband[1] = ff_dequant_subband_32_sse4;
> > c->put_signed_rect_clamped[1] =
> ff_put_signed_rect_clamped_10_sse4;
> > }
> > }
> >
>
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>
Thanks for the suggestions, I'm attaching an amended patch
Still x86_64, but it can always be changed later when I have the time.
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