mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-03 16:09:39 +00:00
370 lines
9.4 KiB
C
370 lines
9.4 KiB
C
/* Gnome-Streamer
|
|
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#define DEBUG_ENABLED
|
|
#include <stdlib.h>
|
|
#include <math.h>
|
|
|
|
#include "config.h"
|
|
#include "gstvideoscale.h"
|
|
#undef HAVE_CPU_I386
|
|
#ifdef HAVE_CPU_I386
|
|
#include "videoscale_x86.h"
|
|
#endif
|
|
|
|
static void gst_videoscale_scale_yuv (Videoscale *scale, unsigned char *src, unsigned char *dest);
|
|
static void gst_videoscale_scale_rgb (Videoscale *scale, unsigned char *src, unsigned char *dest);
|
|
|
|
/* scalers */
|
|
static void gst_videoscale_scale_nearest (Videoscale *scale, unsigned char *src, unsigned char *dest,
|
|
int sw, int sh, int dw, int dh);
|
|
static void gst_videoscale_scale_plane_slow (Videoscale *scale, unsigned char *src, unsigned char *dest,
|
|
int sw, int sh, int dw, int dh);
|
|
static void gst_videoscale_scale_point_sample (Videoscale *scale, unsigned char *src, unsigned char *dest,
|
|
int sw, int sh, int dw, int dh);
|
|
|
|
/* filters */
|
|
static unsigned char gst_videoscale_bilinear (unsigned char *src, double x, double y, int sw, int sh);
|
|
static unsigned char gst_videoscale_bicubic (unsigned char *src, double x, double y, int sw, int sh);
|
|
|
|
void
|
|
gst_videoscale_setup (Videoscale *scale)
|
|
{
|
|
switch (scale->format) {
|
|
case GST_MAKE_FOURCC('I','4','2','0'):
|
|
scale->scale_cc = gst_videoscale_scale_yuv;
|
|
scale->scale_bytes = 1;
|
|
break;
|
|
case GST_MAKE_FOURCC('R','G','B',' '):
|
|
scale->scale_cc = gst_videoscale_scale_rgb;
|
|
/* XXX */
|
|
//scale->scale_bytes = gst_caps_get_int(scale->srcpad->caps,"bpp")/8;
|
|
break;
|
|
default:
|
|
g_print("videoscale: unsupported video format %08x\n", scale->format);
|
|
return; /* XXX */
|
|
}
|
|
|
|
switch (scale->method) {
|
|
case GST_VIDEOSCALE_POINT_SAMPLE:
|
|
scale->scaler = gst_videoscale_scale_point_sample;
|
|
GST_DEBUG (0,"videoscale: scaling method POINT_SAMPLE\n");
|
|
break;
|
|
case GST_VIDEOSCALE_NEAREST:
|
|
#ifdef HAVE_CPU_I386
|
|
gst_videoscale_generate_rowbytes_x86 (scale->copy_row, scale->width,
|
|
scale->targetwidth, scale->scale_bytes);
|
|
scale->scaler = gst_videoscale_scale_nearest_x86;
|
|
#else
|
|
scale->scaler = gst_videoscale_scale_nearest;
|
|
#endif
|
|
GST_DEBUG (0,"videoscale: scaling method NEAREST\n");
|
|
break;
|
|
case GST_VIDEOSCALE_BILINEAR:
|
|
scale->scaler = gst_videoscale_scale_plane_slow;
|
|
scale->filter = gst_videoscale_bilinear;
|
|
GST_DEBUG (0,"videoscale: scaling method BILINEAR\n");
|
|
break;
|
|
case GST_VIDEOSCALE_BICUBIC:
|
|
scale->scaler = gst_videoscale_scale_plane_slow;
|
|
scale->filter = gst_videoscale_bicubic;
|
|
GST_DEBUG (0,"videoscale: scaling method BICUBIC\n");
|
|
break;
|
|
default:
|
|
g_print("videoscale: unsupported scaling method %d\n", scale->method);
|
|
return; /* XXX */
|
|
}
|
|
|
|
return; /* XXX */
|
|
}
|
|
|
|
static void
|
|
gst_videoscale_scale_rgb (Videoscale *scale, unsigned char *src, unsigned char *dest)
|
|
{
|
|
int sw = scale->width;
|
|
int sh = scale->height;
|
|
int dw = scale->targetwidth;
|
|
int dh = scale->targetheight;
|
|
GST_DEBUG (0,"videoscale: scaling RGB %dx%d to %dx%d\n", sw, sh, dw, dh);
|
|
|
|
switch (scale->scale_bytes) {
|
|
case 2:
|
|
dw = ((dw + 1) & ~1) << 1;
|
|
sw = sw<<1;
|
|
break;
|
|
case 4:
|
|
dw = ((dw + 2) & ~3) << 2;
|
|
sw = sw<<2;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
GST_DEBUG (0,"videoscale: %p %p\n", src, dest);
|
|
scale->scaler(scale, src, dest, sw, sh, dw, dh);
|
|
}
|
|
|
|
static void
|
|
gst_videoscale_scale_yuv (Videoscale *scale, unsigned char *src, unsigned char *dest)
|
|
{
|
|
int sw = scale->width;
|
|
int sh = scale->height;
|
|
int dw = scale->targetwidth;
|
|
int dh = scale->targetheight;
|
|
|
|
GST_DEBUG (0,"videoscale: scaling YUV420P %dx%d to %dx%d\n", sw, sh, dw, dh);
|
|
|
|
scale->scaler(scale, src, dest, sw, sh, dw, dh);
|
|
|
|
src += sw*sh;
|
|
dest += dw*dh;
|
|
|
|
dh = dh>>1;
|
|
dw = dw>>1;
|
|
sh = sh>>1;
|
|
sw = sw>>1;
|
|
|
|
scale->scaler(scale, src, dest, sw, sh, dw, dh);
|
|
|
|
src += sw*sh;
|
|
dest += dw*dh;
|
|
|
|
scale->scaler(scale, src, dest, sw, sh, dw, dh);
|
|
}
|
|
|
|
#define RC(x,y) *(src+(int)(x)+(int)((y)*sw))
|
|
|
|
static unsigned char
|
|
gst_videoscale_bilinear (unsigned char *src, double x, double y, int sw, int sh)
|
|
{
|
|
int j=floor(x);
|
|
int k=floor(y);
|
|
double a=x-j;
|
|
double b=y-k;
|
|
double dest;
|
|
int color;
|
|
|
|
GST_DEBUG(0,"videoscale: scaling bilinear %f %f %dx%d\n", x, y, sw, sh);
|
|
|
|
dest=(1-a)*(1-b)*RC(j,k)+
|
|
a*(1-b)*RC(j+1,k);
|
|
|
|
k = MIN(sh-1, k);
|
|
dest+= b*(1-a)*RC(j,k+1)+
|
|
a*b*RC(j+1,k+1);
|
|
|
|
color=rint(dest);
|
|
if (color<0) color=abs(color); // cannot have negative values !
|
|
//if (color<0) color=0; // cannot have negative values !
|
|
if (color>255) color=255;
|
|
|
|
return (unsigned char) color;
|
|
}
|
|
|
|
static unsigned char
|
|
gst_videoscale_bicubic (unsigned char *src, double x, double y, int sw, int sh)
|
|
{
|
|
int j=floor(x);
|
|
int k=floor(y), k2;
|
|
double a=x-j;
|
|
double b=y-k;
|
|
double dest;
|
|
int color;
|
|
double t1, t2, t3, t4;
|
|
double a1, a2, a3, a4;
|
|
|
|
GST_DEBUG (0,"videoscale: scaling bicubic %dx%d\n", sw, sh);
|
|
|
|
a1 = -a*(1-a)*(1-a);
|
|
a2 = (1-2*a*a+a*a*a);
|
|
a3 = a*(1+a-a*a);
|
|
a4 = a*a*(1-a);
|
|
|
|
k2 = MAX(0, k-1);
|
|
t1=a1*RC(j-1,k2)+ a2*RC(j,k2)+ a3*RC(j+1,k2)- a4*RC(j+2,k2);
|
|
t2=a1*RC(j-1,k)+ a2*RC(j,k)+ a3*RC(j+1,k)- a4*RC(j+2,k);
|
|
k2 = MIN(sh, k+1);
|
|
t3=a1*RC(j-1,k2)+ a2*RC(j,k2)+ a3*RC(j+1,k2)- a4*RC(j+2,k2);
|
|
k2 = MIN(sh, k+2);
|
|
t4=a1*RC(j-1,k2)+ a2*RC(j,k2)+ a3*RC(j+1,k2)- a4*RC(j+2,k2);
|
|
|
|
dest= -b*(1-b)*(1-b)*t1+ (1-2*b*b+b*b*b)*t2+ b*(1+b-b*b)*t3+ b*b*(b-1)*t4;
|
|
|
|
color=rint(dest);
|
|
if (color<0) color=abs(color); // cannot have negative values !
|
|
if (color>255) color=255;
|
|
|
|
return (unsigned char) color;
|
|
}
|
|
|
|
static void
|
|
gst_videoscale_scale_plane_slow (Videoscale *scale, unsigned char *src, unsigned char *dest,
|
|
int sw, int sh, int dw, int dh)
|
|
{
|
|
double zoomx = ((double)dw)/(double)sw;
|
|
double zoomy = ((double)dh)/(double)sh;
|
|
double xr, yr;
|
|
int x, y;
|
|
|
|
GST_DEBUG (0,"videoscale: scale plane slow %dx%d %dx%d %g %g %p %p\n", sw, sh, dw, dh, zoomx, zoomy, src, dest);
|
|
|
|
for (y=0; y<dh; y++) {
|
|
yr = ((double)y)/zoomy;
|
|
for (x=0; x<dw; x++) {
|
|
xr = ((double)x)/zoomx;
|
|
|
|
GST_DEBUG (0,"videoscale: scale plane slow %g %g %p\n", xr, yr, (src+(int)(x)+(int)((y)*sw)));
|
|
|
|
if (floor(xr) == xr && floor(yr) == yr){
|
|
GST_DEBUG (0,"videoscale: scale plane %g %g %p %p\n", xr, yr, (src+(int)(x)+(int)((y)*sw)), dest);
|
|
*dest++ = RC(xr, yr);
|
|
}
|
|
else {
|
|
*dest++ = scale->filter(src, xr, yr, sw, sh);
|
|
//*dest++ = gst_videoscale_bicubic(src, xr, yr, sw, sh);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_videoscale_scale_point_sample (Videoscale *scale, unsigned char *src, unsigned char *dest,
|
|
int sw, int sh, int dw, int dh)
|
|
{
|
|
int ypos, yinc, y;
|
|
int xpos, xinc, x;
|
|
int sum, xcount, ycount, loop;
|
|
unsigned char *srcp, *srcp2;
|
|
|
|
GST_DEBUG (0,"videoscale: scaling nearest point sample %p %p %d\n", src, dest, dw);
|
|
|
|
ypos = 0x10000;
|
|
yinc = (sh<<16)/dh;
|
|
xinc = (sw<<16)/dw;
|
|
|
|
for (y = dh; y; y--) {
|
|
|
|
ycount = 1;
|
|
srcp = src;
|
|
while (ypos >0x10000) {
|
|
ycount++;
|
|
ypos-=0x10000;
|
|
src += sw;
|
|
}
|
|
|
|
xpos = 0x10000;
|
|
for ( x=dw; x; x-- ) {
|
|
xcount = 0;
|
|
sum=0;
|
|
while ( xpos >= 0x10000L ) {
|
|
loop = ycount;
|
|
srcp2 = srcp;
|
|
while (loop--) {
|
|
sum += *srcp2;
|
|
srcp2 += sw;
|
|
}
|
|
srcp++;
|
|
xcount++;
|
|
xpos -= 0x10000L;
|
|
}
|
|
*dest++ = sum/(xcount*ycount);
|
|
xpos += xinc;
|
|
}
|
|
|
|
ypos += yinc;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_videoscale_scale_nearest (Videoscale *scale,
|
|
unsigned char *src,
|
|
unsigned char *dest,
|
|
int sw, int sh, int dw, int dh)
|
|
{
|
|
int ypos, yinc, y;
|
|
int xpos, xinc, x;
|
|
|
|
GST_DEBUG (0, "videoscale: scaling nearest %p %p %d %d\n", src, dest, dw, scale->scale_bytes);
|
|
|
|
|
|
ypos = 0x10000;
|
|
yinc = (sh<<16)/dh;
|
|
xinc = (sw<<16)/dw;
|
|
|
|
for (y = dh; y; y--) {
|
|
|
|
while (ypos >0x10000) {
|
|
ypos-=0x10000;
|
|
src += sw;
|
|
}
|
|
|
|
xpos = 0x10000;
|
|
|
|
switch (scale->scale_bytes) {
|
|
case 4:
|
|
{
|
|
guint32 *destp = (guint32 *)dest;
|
|
guint32 *srcp = (guint32 *)src;
|
|
|
|
for ( x=dw>>2; x; x-- ) {
|
|
while ( xpos >= 0x10000L ) {
|
|
srcp++;
|
|
xpos -= 0x10000L;
|
|
}
|
|
*destp++ = *srcp;
|
|
xpos += xinc;
|
|
}
|
|
break;
|
|
}
|
|
case 2:
|
|
{
|
|
guint16 *destp = (guint16 *)dest;
|
|
guint16 *srcp = (guint16 *)src;
|
|
|
|
for ( x=dw>>1; x; x-- ) {
|
|
while ( xpos >= 0x10000L ) {
|
|
srcp++;
|
|
xpos -= 0x10000L;
|
|
}
|
|
*destp++ = *srcp;
|
|
xpos += xinc;
|
|
}
|
|
break;
|
|
}
|
|
case 1:
|
|
{
|
|
guchar *destp = dest;
|
|
guchar *srcp = src;
|
|
|
|
for ( x=dw; x; x-- ) {
|
|
while ( xpos >= 0x10000L ) {
|
|
srcp++;
|
|
xpos -= 0x10000L;
|
|
}
|
|
*destp++ = *srcp;
|
|
xpos += xinc;
|
|
}
|
|
}
|
|
}
|
|
dest += dw;
|
|
|
|
ypos += yinc;
|
|
}
|
|
}
|
|
|