mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-30 04:00:37 +00:00
272 lines
11 KiB
C
272 lines
11 KiB
C
/*
|
|
* Copyright (C) 2004 Wim Taymans <wim@fluendo.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>
|
|
|
|
#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
|
|
|
|
/* note that this function does packing conversion and blending at the
|
|
* same time */
|
|
void
|
|
gst_videomixer_blend_ayuv_ayuv (guint8 * src, gint xpos, gint ypos,
|
|
gint src_width, gint src_height, gdouble src_alpha,
|
|
guint8 * dest, gint dest_width, gint dest_height)
|
|
{
|
|
gint alpha, b_alpha;
|
|
gint i, j;
|
|
gint src_stride, dest_stride;
|
|
gint src_add, dest_add;
|
|
gint Y, U, V;
|
|
|
|
src_stride = src_width * 4;
|
|
dest_stride = dest_width * 4;
|
|
|
|
b_alpha = (gint) (src_alpha * 255);
|
|
|
|
/* adjust src pointers for negative sizes */
|
|
if (xpos < 0) {
|
|
src += -xpos * 4;
|
|
src_width -= -xpos;
|
|
xpos = 0;
|
|
}
|
|
if (ypos < 0) {
|
|
src += -ypos * src_stride;
|
|
src_height -= -ypos;
|
|
ypos = 0;
|
|
}
|
|
/* adjust width/height if the src is bigger than dest */
|
|
if (xpos + src_width > dest_width) {
|
|
src_width = dest_width - xpos;
|
|
}
|
|
if (ypos + src_height > dest_height) {
|
|
src_height = dest_height - ypos;
|
|
}
|
|
|
|
src_add = src_stride - (4 * src_width);
|
|
dest_add = dest_stride - (4 * src_width);
|
|
|
|
dest = dest + 4 * xpos + (ypos * dest_stride);
|
|
|
|
/* we convert a square of 2x2 samples to generate 4 Luma and 2 chroma samples */
|
|
for (i = 0; i < src_height; i++) {
|
|
for (j = 0; j < src_width; j++) {
|
|
alpha = (src[0] * b_alpha) >> 8;
|
|
BLEND_MODE (dest[1], dest[2], dest[3], src[1], src[2], src[3],
|
|
alpha, Y, U, V);
|
|
dest[0] = 0xff;
|
|
dest[1] = Y;
|
|
dest[2] = U;
|
|
dest[3] = V;
|
|
|
|
src += 4;
|
|
dest += 4;
|
|
}
|
|
src += src_add;
|
|
dest += dest_add;
|
|
}
|
|
}
|
|
|
|
#undef BLEND_MODE
|
|
|
|
|
|
/* fill a buffer with a checkerboard pattern */
|
|
void
|
|
gst_videomixer_fill_ayuv_checker (guint8 * dest, gint width, gint height)
|
|
{
|
|
gint i, j;
|
|
static int tab[] = { 80, 160, 80, 160 };
|
|
|
|
for (i = 0; i < height; i++) {
|
|
for (j = 0; j < width; j++) {
|
|
*dest++ = 0xff;
|
|
*dest++ = tab[((i & 0x8) >> 3) + ((j & 0x8) >> 3)];
|
|
*dest++ = 128;
|
|
*dest++ = 128;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
gst_videomixer_fill_ayuv_color (guint8 * dest, gint width, gint height,
|
|
gint colY, gint colU, gint colV)
|
|
{
|
|
gint i, j;
|
|
|
|
for (i = 0; i < height; i++) {
|
|
for (j = 0; j < width; j++) {
|
|
*dest++ = 0xff;
|
|
*dest++ = colY;
|
|
*dest++ = colU;
|
|
*dest++ = colV;
|
|
}
|
|
}
|
|
}
|
|
|
|
size_t
|
|
gst_videomixer_calculate_frame_size_ayuv (gint width, gint height)
|
|
{
|
|
return GST_ROUND_UP_4 (width) * height * 4;
|
|
}
|