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/*
Copyright (C) 2003 Daniel Moreno <comac@comac.darktech.org>
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "hb.h"
#include "hbffmpeg.h"
#include "mpeg2dec/mpeg2.h"
#define HQDN3D_SPATIAL_LUMA_DEFAULT 4.0f
#define HQDN3D_SPATIAL_CHROMA_DEFAULT 3.0f
#define HQDN3D_TEMPORAL_LUMA_DEFAULT 6.0f
#define ABS(A) ( (A) > 0 ? (A) : -(A) )
struct hb_filter_private_s
{
int hqdn3d_coef[4][512*16];
unsigned int * hqdn3d_line;
unsigned short * hqdn3d_frame[3];
};
static int hb_denoise_init( hb_filter_object_t * filter,
hb_filter_init_t * init );
static int hb_denoise_work( hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out );
static void hb_denoise_close( hb_filter_object_t * filter );
hb_filter_object_t hb_filter_denoise =
{
.id = HB_FILTER_DENOISE,
.enforce_order = 1,
.init_index = 0,
.name = "Denoise (hqdn3d)",
.settings = NULL,
.init = hb_denoise_init,
.work = hb_denoise_work,
.close = hb_denoise_close,
};
static void hqdn3d_precalc_coef( int * ct,
double dist25 )
{
int i;
double gamma, simil, c;
gamma = log( 0.25 ) / log( 1.0 - dist25/255.0 - 0.00001 );
for( i = -255*16; i <= 255*16; i++ )
{
simil = 1.0 - ABS(i) / (16*255.0);
c = pow( simil, gamma ) * 65536.0 * (double)i / 16.0;
ct[16*256+i] = (c<0) ? (c-0.5) : (c+0.5);
}
ct[0] = (dist25 != 0);
}
static inline unsigned int hqdn3d_lowpass_mul( unsigned int prev_mul,
unsigned int curr_mul,
int * coef )
{
int diff_mul = prev_mul - curr_mul;
int d = ((diff_mul+0x10007FF)>>12);
return curr_mul + coef[d];
}
static void hqdn3d_denoise_temporal( unsigned char * frame_src,
unsigned char * frame_dst,
unsigned short * frame_ant,
int w, int h,
int * temporal)
{
int x, y;
unsigned int pixel_dst;
for( y = 0; y < h; y++ )
{
for( x = 0; x < w; x++ )
{
pixel_dst = hqdn3d_lowpass_mul( frame_ant[x]<<8,
frame_src[x]<<16,
temporal );
frame_ant[x] = ((pixel_dst+0x1000007F)>>8);
frame_dst[x] = ((pixel_dst+0x10007FFF)>>16);
}
frame_src += w;
frame_dst += w;
frame_ant += w;
}
}
static void hqdn3d_denoise_spatial( unsigned char * frame_src,
unsigned char * frame_dst,
unsigned int * line_ant,
int w, int h,
int * horizontal,
int * vertical )
{
int x, y;
int line_offset_src = 0, line_offset_dst = 0;
unsigned int pixel_ant;
unsigned int pixel_dst;
/* First pixel has no left nor top neighbor. */
pixel_dst = line_ant[0] = pixel_ant = frame_src[0]<<16;
frame_dst[0] = ((pixel_dst+0x10007FFF)>>16);
/* First line has no top neighbor, only left. */
for( x = 1; x < w; x++ )
{
pixel_dst = line_ant[x] = hqdn3d_lowpass_mul(pixel_ant,
frame_src[x]<<16,
horizontal);
frame_dst[x] = ((pixel_dst+0x10007FFF)>>16);
}
for( y = 1; y < h; y++ )
{
unsigned int pixel_ant;
line_offset_src += w, line_offset_dst += w;
/* First pixel on each line doesn't have previous pixel */
pixel_ant = frame_src[line_offset_src]<<16;
pixel_dst = line_ant[0] = hqdn3d_lowpass_mul( line_ant[0],
pixel_ant,
vertical);
frame_dst[line_offset_dst] = ((pixel_dst+0x10007FFF)>>16);
/* The rest of the pixels in the line are normal */
for( x = 1; x < w; x++ )
{
unsigned int pixel_dst;
pixel_ant = hqdn3d_lowpass_mul( pixel_ant,
frame_src[line_offset_src+x]<<16,
horizontal );
pixel_dst = line_ant[x] = hqdn3d_lowpass_mul( line_ant[x],
pixel_ant,
vertical );
frame_dst[line_offset_dst+x]= ((pixel_dst+0x10007FFF)>>16);
}
}
}
static void hqdn3d_denoise( unsigned char * frame_src,
unsigned char * frame_dst,
unsigned int * line_ant,
unsigned short ** frame_ant_ptr,
int w,
int h,
int * horizontal,
int * vertical,
int * temporal)
{
int x, y;
int line_offset_src = 0, line_offset_dst = 0;
unsigned int pixel_ant;
unsigned int pixel_dst;
unsigned short* frame_ant = (*frame_ant_ptr);
if( !frame_ant)
{
(*frame_ant_ptr) = frame_ant = malloc( w*h*sizeof(unsigned short) );
for( y = 0; y < h; y++ )
{
unsigned short* dst = &frame_ant[y*w];
unsigned char* src = frame_src + y*w;
for( x = 0; x < w; x++ )
{
dst[x] = src[x] << 8;
}
}
}
/* If no spatial coefficients, do temporal denoise only */
if( !horizontal[0] && !vertical[0] )
{
hqdn3d_denoise_temporal( frame_src,
frame_dst,
frame_ant,
w, h,
temporal);
return;
}
/* If no temporal coefficients, do spatial denoise only */
if( !temporal[0] )
{
hqdn3d_denoise_spatial( frame_src,
frame_dst,
line_ant,
w, h,
horizontal,
vertical);
return;
}
/* First pixel has no left nor top neighbor. Only previous frame */
line_ant[0] = pixel_ant = frame_src[0] << 16;
pixel_dst = hqdn3d_lowpass_mul( frame_ant[0]<<8,
pixel_ant,
temporal );
frame_ant[0] = ((pixel_dst+0x1000007F)>>8);
frame_dst[0] = ((pixel_dst+0x10007FFF)>>16);
/* First line has no top neighbor. Only left one for each pixel and last frame */
for( x = 1; x < w; x++ )
{
line_ant[x] = pixel_ant = hqdn3d_lowpass_mul( pixel_ant,
frame_src[x]<<16,
horizontal);
pixel_dst = hqdn3d_lowpass_mul( frame_ant[x]<<8,
pixel_ant,
temporal);
frame_ant[x] = ((pixel_dst+0x1000007F)>>8);
frame_dst[x] = ((pixel_dst+0x10007FFF)>>16);
}
/* The rest of the lines in the frame are normal */
for( y = 1; y < h; y++ )
{
unsigned int pixel_ant;
unsigned short * line_prev = &frame_ant[y*w];
line_offset_src += w, line_offset_dst += w;
/* First pixel on each line doesn't have previous pixel */
pixel_ant = frame_src[line_offset_src]<<16;
line_ant[0] = hqdn3d_lowpass_mul( line_ant[0],
pixel_ant,
vertical);
pixel_dst = hqdn3d_lowpass_mul( line_prev[0]<<8,
line_ant[0],
temporal);
line_prev[0] = ((pixel_dst+0x1000007F)>>8);
frame_dst[line_offset_dst] = ((pixel_dst+0x10007FFF)>>16);
/* The rest of the pixels in the line are normal */
for( x = 1; x < w; x++ )
{
unsigned int pixel_dst;
pixel_ant = hqdn3d_lowpass_mul( pixel_ant,
frame_src[line_offset_src+x]<<16,
horizontal );
line_ant[x] = hqdn3d_lowpass_mul( line_ant[x],
pixel_ant, vertical);
pixel_dst = hqdn3d_lowpass_mul( line_prev[x]<<8,
line_ant[x],
temporal );
line_prev[x] = ((pixel_dst+0x1000007F)>>8);
frame_dst[line_offset_dst+x] = ((pixel_dst+0x10007FFF)>>16);
}
}
}
static int hb_denoise_init( hb_filter_object_t * filter,
hb_filter_init_t * init )
{
filter->private_data = calloc( sizeof(struct hb_filter_private_s), 1 );
hb_filter_private_t * pv = filter->private_data;
double spatial_luma, temporal_luma, spatial_chroma, temporal_chroma;
if( filter->settings )
{
switch( sscanf( filter->settings, "%lf:%lf:%lf:%lf",
&spatial_luma, &spatial_chroma,
&temporal_luma, &temporal_chroma ) )
{
case 0:
spatial_luma = HQDN3D_SPATIAL_LUMA_DEFAULT;
spatial_chroma = HQDN3D_SPATIAL_CHROMA_DEFAULT;
temporal_luma = HQDN3D_TEMPORAL_LUMA_DEFAULT;
temporal_chroma = temporal_luma *
spatial_chroma / spatial_luma;
break;
case 1:
spatial_chroma = HQDN3D_SPATIAL_CHROMA_DEFAULT *
spatial_luma / HQDN3D_SPATIAL_LUMA_DEFAULT;
temporal_luma = HQDN3D_TEMPORAL_LUMA_DEFAULT *
spatial_luma / HQDN3D_SPATIAL_LUMA_DEFAULT;
temporal_chroma = temporal_luma *
spatial_chroma / spatial_luma;
break;
case 2:
temporal_luma = HQDN3D_TEMPORAL_LUMA_DEFAULT *
spatial_luma / HQDN3D_SPATIAL_LUMA_DEFAULT;
temporal_chroma = temporal_luma *
spatial_chroma / spatial_luma;
break;
case 3:
temporal_chroma = temporal_luma *
spatial_chroma / spatial_luma;
break;
}
}
hqdn3d_precalc_coef( pv->hqdn3d_coef[0], spatial_luma );
hqdn3d_precalc_coef( pv->hqdn3d_coef[1], temporal_luma );
hqdn3d_precalc_coef( pv->hqdn3d_coef[2], spatial_chroma );
hqdn3d_precalc_coef( pv->hqdn3d_coef[3], temporal_chroma );
return 0;
}
static void hb_denoise_close( hb_filter_object_t * filter )
{
hb_filter_private_t * pv = filter->private_data;
if( !pv )
{
return;
}
if( pv->hqdn3d_line )
{
free( pv->hqdn3d_line );
pv->hqdn3d_line = NULL;
}
if( pv->hqdn3d_frame[0] )
{
free( pv->hqdn3d_frame[0] );
pv->hqdn3d_frame[0] = NULL;
}
if( pv->hqdn3d_frame[1] )
{
free( pv->hqdn3d_frame[1] );
pv->hqdn3d_frame[1] = NULL;
}
if( pv->hqdn3d_frame[2] )
{
free( pv->hqdn3d_frame[2] );
pv->hqdn3d_frame[2] = NULL;
}
free( pv );
filter->private_data = NULL;
}
static int hb_denoise_work( hb_filter_object_t * filter,
hb_buffer_t ** buf_in,
hb_buffer_t ** buf_out )
{
hb_filter_private_t * pv = filter->private_data;
hb_buffer_t * in = *buf_in, * out;
if ( in->size <= 0 )
{
*buf_out = in;
*buf_in = NULL;
return HB_FILTER_DONE;
}
out = hb_video_buffer_init( in->f.width, in->f.height );
if( !pv->hqdn3d_line )
{
pv->hqdn3d_line = malloc( in->f.width * sizeof(int) );
}
hqdn3d_denoise( in->plane[0].data,
out->plane[0].data,
pv->hqdn3d_line,
&pv->hqdn3d_frame[0],
in->plane[0].stride,
in->plane[0].height,
pv->hqdn3d_coef[0],
pv->hqdn3d_coef[0],
pv->hqdn3d_coef[1] );
hqdn3d_denoise( in->plane[1].data,
out->plane[1].data,
pv->hqdn3d_line,
&pv->hqdn3d_frame[1],
in->plane[1].stride,
in->plane[1].height,
pv->hqdn3d_coef[2],
pv->hqdn3d_coef[2],
pv->hqdn3d_coef[3] );
hqdn3d_denoise( in->plane[2].data,
out->plane[2].data,
pv->hqdn3d_line,
&pv->hqdn3d_frame[2],
in->plane[2].stride,
in->plane[2].height,
pv->hqdn3d_coef[2],
pv->hqdn3d_coef[2],
pv->hqdn3d_coef[3] );
out->s = in->s;
hb_buffer_move_subs( out, in );
*buf_out = out;
return HB_FILTER_OK;
}
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