ffmpeg/FFmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2024-09-19 21:06:42 +00:00
Code Issues Packages Projects Releases Wiki Activity

avcodec/utvideodec : add SIMD (SSSE3 and AVX2) for gradient_pred

Browse Source
This commit is contained in:
Martin Vignali 2017-12-02 19:46:42 +01:00
parent 4353c35067
commit 630967ef63
5 changed files with 101 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
libavcodec/lossless_videodsp.c
View File

@ -98,6 +98,16 @@ static int add_left_pred_int16_c(uint16_t *dst, const uint16_t *src, unsigned ma
return acc;
}
static void add_gradient_pred_c(uint8_t *src, const ptrdiff_t stride, const ptrdiff_t width){
int A, B, C, i;
for (i = 0; i < width; i++) {
A = src[i - stride];
B = src[i - (stride + 1)];
C = src[i - 1];
src[i] = (A - B + C + src[i]) & 0xFF;
}
}
void ff_llviddsp_init(LLVidDSPContext *c)
{
@ -106,6 +116,7 @@ void ff_llviddsp_init(LLVidDSPContext *c)
c->add_left_pred = add_left_pred_c;
c->add_left_pred_int16 = add_left_pred_int16_c;
c->add_gradient_pred = add_gradient_pred_c;
if (ARCH_PPC)
ff_llviddsp_init_ppc(c);

1
libavcodec/lossless_videodsp.h
View File

@ -39,6 +39,7 @@ typedef struct LLVidDSPContext {
int (*add_left_pred_int16)(uint16_t *dst, const uint16_t *src,
unsigned mask, ptrdiff_t w, unsigned left);
void (*add_gradient_pred)(uint8_t *src /* align 32 */, const ptrdiff_t stride, const ptrdiff_t width);
} LLVidDSPContext;
void ff_llviddsp_init(LLVidDSPContext *llviddsp);

5
libavcodec/utvideodec.c
View File

@ -460,6 +460,7 @@ static void restore_gradient_planar(UtvideoContext *c, uint8_t *src, ptrdiff_t s
uint8_t *bsrc;
int slice_start, slice_height;
const int cmask = ~rmode;
int min_width = FFMIN(width, 32);
for (slice = 0; slice < slices; slice++) {
slice_start = ((slice * height) / slices) & cmask;
@ -479,12 +480,14 @@ static void restore_gradient_planar(UtvideoContext *c, uint8_t *src, ptrdiff_t s
for (j = 1; j < slice_height; j++) {
// second line - first element has top prediction, the rest uses gradient
bsrc[0] = (bsrc[0] + bsrc[-stride]) & 0xFF;
for (i = 1; i < width; i++) {
for (i = 1; i < min_width; i++) { /* dsp need align 32 */
A = bsrc[i - stride];
B = bsrc[i - (stride + 1)];
C = bsrc[i - 1];
bsrc[i] = (A - B + C + bsrc[i]) & 0xFF;
}
if (width > 32)
c->llviddsp.add_gradient_pred(bsrc + 32, stride, width - 32);
bsrc += stride;
}
}

80
libavcodec/x86/lossless_videodsp.asm
View File

@ -2,6 +2,7 @@
;* SIMD lossless video DSP utils
;* Copyright (c) 2008 Loren Merritt
;* Copyright (c) 2014 Michael Niedermayer
;* Copyright (c) 2017 Jokyo Images
;*
;* This file is part of FFmpeg.
;*
@ -325,3 +326,82 @@ cglobal add_left_pred_int16, 4,4,8, dst, src, mask, w, left
ADD_HFYU_LEFT_LOOP_INT16 u, a
.src_unaligned:
ADD_HFYU_LEFT_LOOP_INT16 u, u
;---------------------------------------------------------------------------------------------
; void add_gradient_pred(uint8_t *src, const ptrdiff_t stride, const ptrdiff_t width)
;---------------------------------------------------------------------------------------------
%macro ADD_GRADIENT_PRED 0
cglobal add_gradient_pred, 3,4,5, src, stride, width, tmp
mova xm0, [pb_15]
;load src - 1 in xm1
movd xm1, [srcq-1]
%if cpuflag(avx2)
vpbroadcastb xm1, xm1
%else
pxor xm2, xm2
pshufb xm1, xm2
%endif
add srcq, widthq
neg widthq
neg strideq
.loop:
lea tmpq, [srcq + strideq]
mova m2, [tmpq + widthq] ; A = src[x-stride]
movu m3, [tmpq + widthq - 1] ; B = src[x - (stride + 1)]
mova m4, [srcq + widthq] ; current val (src[x])
psubb m2, m3; A - B
; prefix sum A-B
pslldq m3, m2, 1
paddb m2, m3
pslldq m3, m2, 2
paddb m2, m3
pslldq m3, m2, 4
paddb m2, m3
pslldq m3, m2, 8
paddb m2, m3
; prefix sum current val
pslldq m3, m4, 1
paddb m4, m3
pslldq m3, m4, 2
paddb m4, m3
pslldq m3, m4, 4
paddb m4, m3
pslldq m3, m4, 8
paddb m4, m3
; last sum
paddb m2, m4 ; current + (A - B)
paddb xm1, xm2 ; += C
mova [srcq + widthq], xm1 ; store
pshufb xm1, xm0 ; put last val in all val of xm1
%if mmsize == 32
vextracti128 xm2, m2, 1 ; get second lane of the ymm
paddb xm1, xm2; += C
mova [srcq + widthq + 16], xm1 ; store
pshufb xm1, xm0 ; put last val in all val of m1
%endif
add widthq, mmsize
jl .loop
RET
%endmacro
INIT_XMM ssse3
ADD_GRADIENT_PRED
%if HAVE_AVX2_EXTERNAL
INIT_YMM avx2
ADD_GRADIENT_PRED
%endif

5
libavcodec/x86/lossless_videodsp_init.c
View File

@ -44,6 +44,9 @@ int ff_add_left_pred_unaligned_avx2(uint8_t *dst, const uint8_t *src,
int ff_add_left_pred_int16_ssse3(uint16_t *dst, const uint16_t *src, unsigned mask, ptrdiff_t w, unsigned acc);
int ff_add_left_pred_int16_sse4(uint16_t *dst, const uint16_t *src, unsigned mask, ptrdiff_t w, unsigned acc);
void ff_add_gradient_pred_ssse3(uint8_t *src, const ptrdiff_t stride, const ptrdiff_t width);
void ff_add_gradient_pred_avx2(uint8_t *src, const ptrdiff_t stride, const ptrdiff_t width);
#if HAVE_INLINE_ASM && HAVE_7REGS && ARCH_X86_32
static void add_median_pred_cmov(uint8_t *dst, const uint8_t *top,
const uint8_t *diff, ptrdiff_t w,
@ -109,6 +112,7 @@ void ff_llviddsp_init_x86(LLVidDSPContext *c)
if (EXTERNAL_SSSE3(cpu_flags)) {
c->add_left_pred = ff_add_left_pred_ssse3;
c->add_left_pred_int16 = ff_add_left_pred_int16_ssse3;
c->add_gradient_pred = ff_add_gradient_pred_ssse3;
}
if (EXTERNAL_SSSE3_FAST(cpu_flags)) {
@ -121,5 +125,6 @@ void ff_llviddsp_init_x86(LLVidDSPContext *c)
if (EXTERNAL_AVX2_FAST(cpu_flags)) {
c->add_bytes = ff_add_bytes_avx2;
c->add_left_pred = ff_add_left_pred_unaligned_avx2;
c->add_gradient_pred = ff_add_gradient_pred_avx2;
}
}