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FFmpeg/libavfilter/gblur.h
Wu Jianhua 4041c1029b libavfilter/x86/vf_gblur: add localbuf and ff_horiz_slice_avx2/512()
We introduced a ff_horiz_slice_avx2/512() implemented on a new algorithm.
In a nutshell, the new algorithm does three things, gathering data from
8/16 rows, blurring data, and scattering data back to the image buffer.
Here we used a customized transpose 8x8/16x16 to avoid the huge overhead
brought by gather and scatter instructions, which is dependent on the
temporary buffer called localbuf added newly.

Performance data:
ff_horiz_slice_avx2(old): 109.89
ff_horiz_slice_avx2(new): 666.67
ff_horiz_slice_avx512: 1000

Co-authored-by: Cheng Yanfei <yanfei.cheng@intel.com>
Co-authored-by: Jin Jun <jun.i.jin@intel.com>
Signed-off-by: Wu Jianhua <jianhua.wu@intel.com>
2021-08-29 19:58:33 +02:00

63 lines
2.3 KiB
C

/*
* Copyright (c) 2011 Pascal Getreuer
* Copyright (c) 2016 Paul B Mahol
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef AVFILTER_GBLUR_H
#define AVFILTER_GBLUR_H
#include "avfilter.h"
typedef struct GBlurContext {
const AVClass *class;
float sigma;
float sigmaV;
int steps;
int planes;
int flt;
int depth;
int stride;
int planewidth[4];
int planeheight[4];
float *buffer;
float *localbuf; ///< temporary buffer for horiz_slice. NULL if not used
float boundaryscale;
float boundaryscaleV;
float postscale;
float postscaleV;
float nu;
float nuV;
int nb_planes;
void (*horiz_slice)(float *buffer, int width, int height, int steps, float nu, float bscale, float *localbuf);
void (*verti_slice)(float *buffer, int width, int height, int slice_start, int slice_end, int steps,
float nu, float bscale);
void (*postscale_slice)(float *buffer, int length, float postscale, float min, float max);
} GBlurContext;
void ff_gblur_init(GBlurContext *s);
void ff_gblur_init_x86(GBlurContext *s);
#endif