mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-23 16:50:47 +00:00
336 lines
14 KiB
C
336 lines
14 KiB
C
/*
|
|
* Copyright (C) 2006 Mindfruit Bv.
|
|
* Author: Sjoerd Simons <sjoerd@luon.net>
|
|
* Author: Alex Ugarte <alexugarte@gmail.com>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
|
|
#include <gst/gst.h>
|
|
#include <string.h>
|
|
#include "videomixer.h"
|
|
|
|
#define BLEND_NORMAL(Y1,U1,V1,Y2,U2,V2,alpha,Y,U,V) \
|
|
Y = ((Y1*(255-alpha))+(Y2*alpha))>>8; \
|
|
U = ((U1*(255-alpha))+(U2*alpha))>>8; \
|
|
V = ((V1*(255-alpha))+(V2*alpha))>>8;
|
|
|
|
#define BLEND_ADD(Y1,U1,V1,Y2,U2,V2,alpha,Y,U,V) \
|
|
Y = Y1+((Y2*alpha)>>8); \
|
|
U = U1+(((127*(255-alpha)+(U2*alpha)))>>8)-127; \
|
|
V = V1+(((127*(255-alpha)+(V2*alpha)))>>8)-127; \
|
|
if (Y>255) { \
|
|
gint mult = MAX (0, 288-Y); \
|
|
U = ((U*mult) + (127*(32-mult)))>>5; \
|
|
V = ((V*mult) + (127*(32-mult)))>>5; \
|
|
Y = 255; \
|
|
} \
|
|
U = MIN (U,255); \
|
|
V = MIN (V,255);
|
|
|
|
#define BLEND_SUBTRACT(Y1,U1,V1,Y2,U2,V2,alpha,Y,U,V) \
|
|
Y = Y1-((Y2*alpha)>>8); \
|
|
U = U1+(((127*(255-alpha)+(U2*alpha)))>>8)-127; \
|
|
V = V1+(((127*(255-alpha)+(V2*alpha)))>>8)-127; \
|
|
if (Y<0) { \
|
|
gint mult = MIN (32, -Y); \
|
|
U = ((U*(32-mult)) + (127*mult))>>5; \
|
|
V = ((V*(32-mult)) + (127*mult))>>5; \
|
|
Y = 0; \
|
|
}
|
|
|
|
#define BLEND_DARKEN(Y1,U1,V1,Y2,U2,V2,alpha,Y,U,V) \
|
|
if (Y1 < Y2) { \
|
|
Y = Y1; U = U1; V = V1; \
|
|
} \
|
|
else { \
|
|
Y = ((Y1*(255-alpha))+(Y2*alpha))>>8; \
|
|
U = ((U1*(255-alpha))+(U2*alpha))>>8; \
|
|
V = ((V1*(255-alpha))+(V2*alpha))>>8; \
|
|
}
|
|
|
|
#define BLEND_LIGHTEN(Y1,U1,V1,Y2,U2,V2,alpha,Y,U,V) \
|
|
if (Y1 > Y2) { \
|
|
Y = Y1; U = U1; V = V1; \
|
|
} \
|
|
else { \
|
|
Y = ((Y1*(255-alpha))+(Y2*alpha))>>8; \
|
|
U = ((U1*(255-alpha))+(U2*alpha))>>8; \
|
|
V = ((V1*(255-alpha))+(V2*alpha))>>8; \
|
|
}
|
|
|
|
#define BLEND_MULTIPLY(Y1,U1,V1,Y2,U2,V2,alpha,Y,U,V) \
|
|
Y = (Y1*(256*(255-alpha) +(Y2*alpha)))>>16; \
|
|
U = ((U1*(255-alpha)*256)+(alpha*(U1*Y2+128*(256-Y2))))>>16; \
|
|
V = ((V1*(255-alpha)*256)+(alpha*(V1*Y2+128*(256-Y2))))>>16;
|
|
|
|
#define BLEND_DIFFERENCE(Y1,U1,V1,Y2,U2,V2,alpha,Y,U,V) \
|
|
Y = ABS((gint)Y1-(gint)Y2)+127; \
|
|
U = ABS((gint)U1-(gint)U2)+127; \
|
|
V = ABS((gint)V1-(gint)V2)+127; \
|
|
Y = ((Y*alpha)+(Y1*(255-alpha)))>>8; \
|
|
U = ((U*alpha)+(U1*(255-alpha)))>>8; \
|
|
V = ((V*alpha)+(V1*(255-alpha)))>>8; \
|
|
if (Y>255) { \
|
|
gint mult = MAX (0, 288-Y); \
|
|
U = ((U*mult) + (127*(32-mult)))>>5; \
|
|
V = ((V*mult) + (127*(32-mult)))>>5; \
|
|
Y = 255; \
|
|
} else if (Y<0) { \
|
|
gint mult = MIN (32, -Y); \
|
|
U = ((U*(32-mult)) + (127*mult))>>5; \
|
|
V = ((V*(32-mult)) + (127*mult))>>5; \
|
|
Y = 0; \
|
|
} \
|
|
U = CLAMP(U, 0, 255); \
|
|
V = CLAMP(V, 0, 255);
|
|
|
|
#define BLEND_EXCLUSION(Y1,U1,V1,Y2,U2,V2,alpha,Y,U,V) \
|
|
Y = ((gint)(Y1^0xff)*Y2+(gint)(Y2^0xff)*Y1)>>8; \
|
|
U = ((gint)(U1^0xff)*Y2+(gint)(Y2^0xff)*U1)>>8; \
|
|
V = ((gint)(V1^0xff)*Y2+(gint)(Y2^0xff)*V1)>>8; \
|
|
Y = ((Y*alpha)+(Y1*(255-alpha)))>>8; \
|
|
U = ((U*alpha)+(U1*(255-alpha)))>>8; \
|
|
V = ((V*alpha)+(V1*(255-alpha)))>>8; \
|
|
if (Y>255) { \
|
|
gint mult = MAX (0, 288-Y); \
|
|
U = ((U*mult) + (127*(32-mult)))>>5; \
|
|
V = ((V*mult) + (127*(32-mult)))>>5; \
|
|
Y = 255; \
|
|
} else if (Y<0) { \
|
|
gint mult = MIN (32, -Y); \
|
|
U = ((U*(32-mult)) + (127*mult))>>5; \
|
|
V = ((V*(32-mult)) + (127*mult))>>5; \
|
|
Y = 0; \
|
|
} \
|
|
U = CLAMP(U, 0, 255); \
|
|
V = CLAMP(V, 0, 255);
|
|
|
|
#define BLEND_SOFTLIGHT(Y1,U1,V1,Y2,U2,V2,alpha,Y,U,V) \
|
|
Y = (gint)Y1+(gint)Y2 - 127; \
|
|
U = (gint)U1+(gint)U2 - 127; \
|
|
V = (gint)V1+(gint)V2 - 127; \
|
|
Y = ((Y*alpha)+(Y1*(255-alpha)))>>8; \
|
|
U = ((U*alpha)+(U1*(255-alpha)))>>8; \
|
|
V = ((V*alpha)+(V1*(255-alpha)))>>8; \
|
|
if (Y>255) { \
|
|
gint mult = MAX (0, 288-Y); \
|
|
U = ((U*mult) + (127*(32-mult)))>>5; \
|
|
V = ((V*mult) + (127*(32-mult)))>>5; \
|
|
Y = 255; \
|
|
} else if (Y<0) { \
|
|
gint mult = MIN (32, -Y); \
|
|
U = ((U*(32-mult)) + (127*mult))>>5; \
|
|
V = ((V*(32-mult)) + (127*mult))>>5; \
|
|
Y = 0; \
|
|
} \
|
|
|
|
#define BLEND_HARDLIGHT(Y1,U1,V1,Y2,U2,V2,alpha,Y,U,V) \
|
|
Y = (gint)Y1+(gint)Y2*2 - 255; \
|
|
U = (gint)U1+(gint)U2 - 127; \
|
|
V = (gint)V1+(gint)V2 - 127; \
|
|
Y = ((Y*alpha)+(Y1*(255-alpha)))>>8; \
|
|
U = ((U*alpha)+(U1*(255-alpha)))>>8; \
|
|
V = ((V*alpha)+(V1*(255-alpha)))>>8; \
|
|
if (Y>255) { \
|
|
gint mult = MAX (0, 288-Y); \
|
|
U = ((U*mult) + (127*(32-mult)))>>5; \
|
|
V = ((V*mult) + (127*(32-mult)))>>5; \
|
|
Y = 255; \
|
|
} else if (Y<0) { \
|
|
gint mult = MIN (32, -Y); \
|
|
U = ((U*(32-mult)) + (127*mult))>>5; \
|
|
V = ((V*(32-mult)) + (127*mult))>>5; \
|
|
Y = 0; \
|
|
} \
|
|
|
|
#define BLEND_MODE BLEND_NORMAL
|
|
#if 0
|
|
#define BLEND_MODE BLEND_NORMAL
|
|
#define BLEND_MODE BLEND_ADD
|
|
#define BLEND_MODE BLEND_SUBTRACT
|
|
#define BLEND_MODE BLEND_LIGHTEN
|
|
#define BLEND_MODE BLEND_DARKEN
|
|
#define BLEND_MODE BLEND_MULTIPLY
|
|
#define BLEND_MODE BLEND_DIFFERENCE
|
|
#define BLEND_MODE BLEND_EXCLUSION
|
|
#define BLEND_MODE BLEND_SOFTLIGHT
|
|
#define BLEND_MODE BLEND_HARDLIGHT
|
|
#endif
|
|
|
|
/* I420 */
|
|
/* Copied from jpegenc */
|
|
#define VIDEO_Y_ROWSTRIDE(width) (GST_ROUND_UP_4(width))
|
|
#define VIDEO_U_ROWSTRIDE(width) (GST_ROUND_UP_8(width)/2)
|
|
#define VIDEO_V_ROWSTRIDE(width) ((GST_ROUND_UP_8(VIDEO_Y_ROWSTRIDE(width)))/2)
|
|
|
|
#define VIDEO_Y_OFFSET(w,h) (0)
|
|
#define VIDEO_U_OFFSET(w,h) (VIDEO_Y_OFFSET(w,h)+(VIDEO_Y_ROWSTRIDE(w)*GST_ROUND_UP_2(h)))
|
|
#define VIDEO_V_OFFSET(w,h) (VIDEO_U_OFFSET(w,h)+(VIDEO_U_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2))
|
|
|
|
#define VIDEO_SIZE(w,h) (VIDEO_V_OFFSET(w,h)+(VIDEO_V_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2))
|
|
|
|
inline static void
|
|
gst_i420_do_blend (guint8 * src, guint8 * dest,
|
|
gint src_stride, gint dest_stride, gint src_width, gint src_height,
|
|
gint dest_width, gdouble src_alpha)
|
|
{
|
|
int i, j;
|
|
|
|
/* If it's completely transparent... we just return */
|
|
if (G_UNLIKELY (src_alpha == 0.0)) {
|
|
GST_INFO ("Fast copy (alpha == 0.0)");
|
|
return;
|
|
}
|
|
|
|
/* If it's completely opaque, we do a fast copy */
|
|
if (G_UNLIKELY (src_alpha == 1.0)) {
|
|
GST_INFO ("Fast copy (alpha == 1.0)");
|
|
for (i = 0; i < src_height; i++) {
|
|
memcpy (dest, src, src_width);
|
|
src += src_stride;
|
|
dest += dest_stride;
|
|
}
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < src_height; i++) {
|
|
for (j = 0; j < src_width; j++) {
|
|
*dest = src_alpha * (*src) + (1. - src_alpha) * (*dest);
|
|
dest++;
|
|
src++;
|
|
}
|
|
src += src_stride - src_width;
|
|
dest += dest_stride - dest_width;
|
|
}
|
|
}
|
|
|
|
/* note that this function does packing conversion and blending at the
|
|
* same time */
|
|
void
|
|
gst_videomixer_blend_i420_i420 (guint8 * src, gint xpos, gint ypos,
|
|
gint src_width, gint src_height, gdouble src_alpha,
|
|
guint8 * dest, gint dest_width, gint dest_height)
|
|
{
|
|
guint8 *b_src;
|
|
guint8 *b_dest;
|
|
gint b_src_width = src_width;
|
|
gint b_src_height = src_height;
|
|
gint xoffset = 0;
|
|
gint yoffset = 0;
|
|
|
|
xpos = GST_ROUND_UP_2 (xpos);
|
|
ypos = GST_ROUND_UP_2 (ypos);
|
|
|
|
/* adjust src pointers for negative sizes */
|
|
if (xpos < 0) {
|
|
xoffset = -xpos;
|
|
b_src_width -= -xpos;
|
|
xpos = 0;
|
|
}
|
|
if (ypos < 0) {
|
|
yoffset += -ypos;
|
|
b_src_height -= -ypos;
|
|
ypos = 0;
|
|
}
|
|
/* If x or y offset are larger then the source it's outside of the picture */
|
|
if (xoffset > src_width || yoffset > src_width) {
|
|
return;
|
|
}
|
|
|
|
/* adjust width/height if the src is bigger than dest */
|
|
if (xpos + src_width > dest_width) {
|
|
b_src_width = dest_width - xpos;
|
|
}
|
|
if (ypos + src_height > dest_height) {
|
|
b_src_height = dest_height - ypos;
|
|
}
|
|
if (b_src_width < 0 || b_src_height < 0) {
|
|
return;
|
|
}
|
|
|
|
/* First mix Y, then U, then V */
|
|
b_src = src + VIDEO_Y_OFFSET (src_width, src_height);
|
|
b_dest = dest + VIDEO_Y_OFFSET (dest_width, dest_height);
|
|
gst_i420_do_blend (b_src + xoffset + yoffset * VIDEO_Y_ROWSTRIDE (src_width),
|
|
b_dest + xpos + ypos * VIDEO_Y_ROWSTRIDE (dest_width),
|
|
VIDEO_Y_ROWSTRIDE (src_width),
|
|
VIDEO_Y_ROWSTRIDE (dest_width), b_src_width, b_src_height,
|
|
dest_width, src_alpha);
|
|
|
|
b_src = src + VIDEO_U_OFFSET (src_width, src_height);
|
|
b_dest = dest + VIDEO_U_OFFSET (dest_width, dest_height);
|
|
|
|
gst_i420_do_blend (b_src + xoffset / 2 +
|
|
yoffset / 2 * VIDEO_U_ROWSTRIDE (src_width),
|
|
b_dest + xpos / 2 + ypos / 2 * VIDEO_U_ROWSTRIDE (dest_width),
|
|
VIDEO_U_ROWSTRIDE (src_width), VIDEO_U_ROWSTRIDE (dest_width),
|
|
b_src_width / 2, GST_ROUND_UP_2 (b_src_height) / 2, dest_width / 2,
|
|
src_alpha);
|
|
|
|
b_src = src + VIDEO_V_OFFSET (src_width, src_height);
|
|
b_dest = dest + VIDEO_V_OFFSET (dest_width, dest_height);
|
|
|
|
gst_i420_do_blend (b_src + xoffset / 2 +
|
|
yoffset / 2 * VIDEO_V_ROWSTRIDE (src_width),
|
|
b_dest + xpos / 2 + ypos / 2 * VIDEO_V_ROWSTRIDE (dest_width),
|
|
VIDEO_V_ROWSTRIDE (src_width), VIDEO_V_ROWSTRIDE (dest_width),
|
|
b_src_width / 2, GST_ROUND_UP_2 (b_src_height) / 2, dest_width / 2,
|
|
src_alpha);
|
|
}
|
|
|
|
#undef BLEND_MODE
|
|
|
|
/* fill a buffer with a checkerboard pattern */
|
|
void
|
|
gst_videomixer_fill_i420_checker (guint8 * dest, gint width, gint height)
|
|
{
|
|
int size;
|
|
gint i, j;
|
|
static const int tab[] = { 80, 160, 80, 160 };
|
|
guint8 *p = dest;
|
|
|
|
for (i = 0; i < height; i++) {
|
|
for (j = 0; j < width; j++) {
|
|
*p++ = tab[((i & 0x8) >> 3) + ((j & 0x8) >> 3)];
|
|
}
|
|
p += VIDEO_Y_ROWSTRIDE (width) - width;
|
|
}
|
|
|
|
size = (VIDEO_U_ROWSTRIDE (width) * height) / 2;
|
|
memset (dest + VIDEO_U_OFFSET (width, height), 0x80, size);
|
|
|
|
size = (VIDEO_V_ROWSTRIDE (width) * height) / 2;
|
|
memset (dest + VIDEO_V_OFFSET (width, height), 0x80, size);
|
|
}
|
|
|
|
void
|
|
gst_videomixer_fill_i420_color (guint8 * dest, gint width, gint height,
|
|
gint colY, gint colU, gint colV)
|
|
{
|
|
int size;
|
|
|
|
size = VIDEO_Y_ROWSTRIDE (width) * height;
|
|
memset (dest, colY, size);
|
|
|
|
size = (VIDEO_U_ROWSTRIDE (width) * height) / 2;
|
|
memset (dest + VIDEO_U_OFFSET (width, height), colU, size);
|
|
|
|
size = (VIDEO_V_ROWSTRIDE (width) * height) / 2;
|
|
memset (dest + VIDEO_V_OFFSET (width, height), colV, size);
|
|
|
|
}
|