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mpv/libmpcodecs/vf_unsharp.c

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/*
Copyright (C) 2002 Rémi Guyomarch <rguyom@pobox.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <math.h>
#include "../config.h"
#include "../mp_msg.h"
#include "../cpudetect.h"
#ifdef USE_SETLOCALE
#include <locale.h>
#endif
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif
#include "img_format.h"
#include "mp_image.h"
#include "vf.h"
#include "../libvo/fastmemcpy.h"
#ifndef MIN
#define MIN(a,b) (((a)<(b))?(a):(b))
#endif
#ifndef MAX
#define MAX(a,b) (((a)>(b))?(a):(b))
#endif
//===========================================================================//
#define MIN_MATRIX_SIZE 3
#define MAX_MATRIX_SIZE 63
typedef struct FilterParam {
int msizeX, msizeY;
double amount;
uint32_t *SC[MAX_MATRIX_SIZE-1];
} FilterParam;
struct vf_priv_s {
FilterParam lumaParam;
FilterParam chromaParam;
mp_image_t *dmpi;
unsigned int outfmt;
};
//===========================================================================//
/* This code is based on :
An Efficient algorithm for Gaussian blur using finite-state machines
Frederick M. Waltz and John W. V. Miller
SPIE Conf. on Machine Vision Systems for Inspection and Metrology VII
Originally published Boston, Nov 98
*/
static void unsharp( uint8_t *dst, uint8_t *src, int dstStride, int srcStride, int width, int height, FilterParam *fp ) {
uint32_t **SC = fp->SC;
uint32_t SR[MAX_MATRIX_SIZE-1], Tmp1, Tmp2;
uint8_t* src2 = src; // avoid gcc warning
int32_t res;
int x, y, z;
int amount = fp->amount * 65536.0;
int stepsX = fp->msizeX/2;
int stepsY = fp->msizeY/2;
int scalebits = (stepsX+stepsY)*2;
int32_t halfscale = 1 << ((stepsX+stepsY)*2-1);
if( !fp->amount ) {
if( src == dst )
return;
if( dstStride == srcStride )
memcpy( dst, src, srcStride*height );
else
for( y=0; y<height; y++, dst+=dstStride, src+=srcStride )
memcpy( dst, src, width );
return;
}
for( y=0; y<2*stepsY; y++ )
memset( SC[y], 0, sizeof(SC[y][0]) * (width+2*stepsX) );
for( y=-stepsY; y<height+stepsY; y++ ) {
if( y < height ) src2 = src;
memset( SR, 0, sizeof(SR[0]) * (2*stepsX-1) );
for( x=-stepsX; x<width+stepsX; x++ ) {
Tmp1 = x<=0 ? src2[0] : x>=width ? src2[width-1] : src2[x];
for( z=0; z<stepsX*2; z+=2 ) {
Tmp2 = SR[z+0] + Tmp1; SR[z+0] = Tmp1;
Tmp1 = SR[z+1] + Tmp2; SR[z+1] = Tmp2;
}
for( z=0; z<stepsY*2; z+=2 ) {
Tmp2 = SC[z+0][x+stepsX] + Tmp1; SC[z+0][x+stepsX] = Tmp1;
Tmp1 = SC[z+1][x+stepsX] + Tmp2; SC[z+1][x+stepsX] = Tmp2;
}
if( x>=stepsX && y>=stepsY ) {
uint8_t* srx = src - stepsY*srcStride + x - stepsX;
uint8_t* dsx = dst - stepsY*dstStride + x - stepsX;
res = (int32_t)*srx + ( ( ( (int32_t)*srx - (int32_t)((Tmp1+halfscale) >> scalebits) ) * amount ) >> 16 );
*dsx = res>255 ? 255 : res<0 ? 0 : (uint8_t)res;
}
}
if( y >= 0 ) {
dst += dstStride;
src += srcStride;
}
}
}
//===========================================================================//
static int config( struct vf_instance_s* vf,
int width, int height, int d_width, int d_height,
unsigned int flags, unsigned int outfmt ) {
int z, stepsX, stepsY;
FilterParam *fp;
char *effect;
// allocate buffers
fp = &vf->priv->lumaParam;
effect = fp->amount == 0 ? "don't touch" : fp->amount < 0 ? "blur" : "sharpen";
mp_msg( MSGT_VFILTER, MSGL_INFO, "unsharp: %dx%d:%0.2f (%s luma) \n", fp->msizeX, fp->msizeY, fp->amount, effect );
memset( fp->SC, 0, sizeof( fp->SC ) );
stepsX = fp->msizeX/2;
stepsY = fp->msizeY/2;
for( z=0; z<2*stepsY; z++ )
fp->SC[z] = memalign( 16, sizeof(*(fp->SC[z])) * (width+2*stepsX) );
fp = &vf->priv->chromaParam;
effect = fp->amount == 0 ? "don't touch" : fp->amount < 0 ? "blur" : "sharpen";
mp_msg( MSGT_VFILTER, MSGL_INFO, "unsharp: %dx%d:%0.2f (%s chroma)\n", fp->msizeX, fp->msizeY, fp->amount, effect );
memset( fp->SC, 0, sizeof( fp->SC ) );
stepsX = fp->msizeX/2;
stepsY = fp->msizeY/2;
for( z=0; z<2*stepsY; z++ )
fp->SC[z] = memalign( 16, sizeof(*(fp->SC[z])) * (width+2*stepsX) );
return vf_next_config( vf, width, height, d_width, d_height, flags, outfmt );
}
//===========================================================================//
static void get_image( struct vf_instance_s* vf, mp_image_t *mpi ) {
if( mpi->flags & MP_IMGFLAG_PRESERVE )
return; // don't change
if( mpi->imgfmt!=vf->priv->outfmt )
return; // colorspace differ
vf->priv->dmpi = vf_get_image( vf->next, mpi->imgfmt, mpi->type, mpi->flags, mpi->w, mpi->h );
mpi->planes[0] = vf->priv->dmpi->planes[0];
mpi->stride[0] = vf->priv->dmpi->stride[0];
mpi->width = vf->priv->dmpi->width;
if( mpi->flags & MP_IMGFLAG_PLANAR ) {
mpi->planes[1] = vf->priv->dmpi->planes[1];
mpi->planes[2] = vf->priv->dmpi->planes[2];
mpi->stride[1] = vf->priv->dmpi->stride[1];
mpi->stride[2] = vf->priv->dmpi->stride[2];
}
mpi->flags |= MP_IMGFLAG_DIRECT;
}
static int put_image( struct vf_instance_s* vf, mp_image_t *mpi ) {
mp_image_t *dmpi;
if( !(mpi->flags & MP_IMGFLAG_DIRECT) )
// no DR, so get a new image! hope we'll get DR buffer:
vf->priv->dmpi = vf_get_image( vf->next,vf->priv->outfmt, MP_IMGTYPE_TEMP, MP_IMGFLAG_ACCEPT_STRIDE, mpi->w, mpi->h);
dmpi= vf->priv->dmpi;
unsharp( dmpi->planes[0], mpi->planes[0], dmpi->stride[0], mpi->stride[0], mpi->w, mpi->h, &vf->priv->lumaParam );
unsharp( dmpi->planes[1], mpi->planes[1], dmpi->stride[1], mpi->stride[1], mpi->w/2, mpi->h/2, &vf->priv->chromaParam );
unsharp( dmpi->planes[2], mpi->planes[2], dmpi->stride[2], mpi->stride[2], mpi->w/2, mpi->h/2, &vf->priv->chromaParam );
dmpi->qscale = mpi->qscale;
dmpi->qstride = mpi->qstride;
#ifdef HAVE_MMX
if(gCpuCaps.hasMMX)
asm volatile ("emms\n\t");
#endif
#ifdef HAVE_MMX2
if(gCpuCaps.hasMMX2)
asm volatile ("sfence\n\t");
#endif
return vf_next_put_image( vf, dmpi );
}
static void uninit( struct vf_instance_s* vf ) {
unsigned int z;
FilterParam *fp;
if( !vf->priv ) return;
fp = &vf->priv->lumaParam;
for( z=0; z<sizeof(fp->SC)/sizeof(fp->SC[0]); z++ ) {
if( fp->SC[z] ) free( fp->SC[z] );
fp->SC[z] = NULL;
}
fp = &vf->priv->chromaParam;
for( z=0; z<sizeof(fp->SC)/sizeof(fp->SC[0]); z++ ) {
if( fp->SC[z] ) free( fp->SC[z] );
fp->SC[z] = NULL;
}
free( vf->priv );
vf->priv = NULL;
}
//===========================================================================//
static int query_format( struct vf_instance_s* vf, unsigned int fmt ) {
switch(fmt) {
case IMGFMT_YV12:
case IMGFMT_I420:
case IMGFMT_IYUV:
return vf_next_query_format( vf, vf->priv->outfmt );
}
return 0;
}
//===========================================================================//
static void parse( FilterParam *fp, char* args ) {
// l7x5:0.8:c3x3:-0.2
char *z;
char *pos = args;
char *max = args + strlen(args);
// parse matrix sizes
fp->msizeX = ( pos && pos+1<max ) ? atoi( pos+1 ) : 0;
z = strchr( pos+1, 'x' );
fp->msizeY = ( z && z+1<max ) ? atoi( pos=z+1 ) : fp->msizeX;
// min/max & odd
fp->msizeX = 1 | MIN( MAX( fp->msizeX, MIN_MATRIX_SIZE ), MAX_MATRIX_SIZE );
fp->msizeY = 1 | MIN( MAX( fp->msizeY, MIN_MATRIX_SIZE ), MAX_MATRIX_SIZE );
// parse amount
pos = strchr( pos+1, ':' );
#ifdef USE_SETLOCALE
setlocale( LC_NUMERIC, "C" );
#endif
fp->amount = ( pos && pos+1<max ) ? atof( pos+1 ) : 0;
#ifdef USE_SETLOCALE
setlocale( LC_NUMERIC, "" );
#endif
}
//===========================================================================//
static unsigned int fmt_list[] = {
IMGFMT_YV12,
IMGFMT_I420,
IMGFMT_IYUV,
0
};
static int open( vf_instance_t *vf, char* args ) {
vf->config = config;
vf->put_image = put_image;
vf->get_image = get_image;
vf->query_format = query_format;
vf->uninit = uninit;
vf->priv = malloc( sizeof(struct vf_priv_s) );
memset( vf->priv, 0, sizeof(struct vf_priv_s) );
if( args ) {
char *args2 = strchr( args, 'l' );
if( args2 )
parse( &vf->priv->lumaParam, args2 );
else {
vf->priv->lumaParam.amount =
vf->priv->lumaParam.msizeX =
vf->priv->lumaParam.msizeY = 0;
}
args2 = strchr( args, 'c' );
if( args2 )
parse( &vf->priv->chromaParam, args2 );
else {
vf->priv->chromaParam.amount =
vf->priv->chromaParam.msizeX =
vf->priv->chromaParam.msizeY = 0;
}
if( !vf->priv->lumaParam.msizeX && !vf->priv->chromaParam.msizeX )
return 0; // nothing to do
}
// check csp:
vf->priv->outfmt = vf_match_csp( &vf->next, fmt_list, IMGFMT_YV12 );
if( !vf->priv->outfmt ) {
uninit( vf );
return 0; // no csp match :(
}
return 1;
}
vf_info_t vf_info_unsharp = {
"unsharp mask & gaussian blur",
"unsharp",
"Rémi Guyomarch",
"",
open
};
//===========================================================================//
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