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/*
* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
* Copyright (C) 2009 Sebastian Dröge <sebastian.droege@collabora.co.uk>
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#ifdef HAVE_GCC_ASM
#if defined(HAVE_CPU_I386) || defined(HAVE_CPU_X86_64)
#define BUILD_X86_ASM
#endif
#endif
#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);
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
#ifdef BUILD_X86_ASM
void
gst_videomixer_blend_ayuv_ayuv_mmx (guint8 * src, gint xpos, gint ypos,
gint src_width, gint src_height, gdouble src_alpha,
guint8 * dest, gint dest_width, gint dest_height)
{
gint b_alpha;
gint i;
gint src_stride, dest_stride;
gint src_add, dest_add;
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);
for (i = 0; i < src_height; i++) {
gulong old_ebx;
/* *INDENT-OFF* */
__asm__ __volatile__ (
"movl %%ebx , %6 \n\t"
"pxor %%mm7 , %%mm7 \n\t" /* mm7 = 0 */
"pcmpeqd %%mm6 , %%mm6 \n\t" /* mm6 = 0xffff... */
"punpcklbw %%mm7 , %%mm6 \n\t" /* mm6 = 0x00ff00ff00ff... */
"pcmpeqd %%mm5 , %%mm5 \n\t" /* mm5 = 0xffff... */
"psrlq $56 , %%mm5 \n\t" /* mm5 = 0x0...0ff */
"xor %%ebx , %%ebx \n\t" /* ebx = 0 */
"1: \n\t"
"movzbl (%2) , %%eax \n\t" /* eax == source alpha */
"imul %4 , %%eax \n\t" /* eax = source alpha * alpha */
"sar $8 , %%eax \n\t" /* eax = (source alpha * alpha) / 256 */
"movd %%eax , %%mm0 \n\t" /* mm0 = apply alpha */
"movd (%2) , %%mm2 \n\t" /* mm2 = src */
"movd (%3) , %%mm1 \n\t" /* mm1 = dest */
"punpcklwd %%mm0 , %%mm0 \n\t"
"punpckldq %%mm0 , %%mm0 \n\t" /* mm0 == 0a 0a 0a 0a */
"punpcklbw %%mm7 , %%mm1 \n\t" /* mm1 == dv du dy da */
"punpcklbw %%mm7 , %%mm2 \n\t" /* mm2 == sv su sy sa */
"pmullw %%mm0 , %%mm2 \n\t" /* mm2 == a * s */
"pandn %%mm6 , %%mm0 \n\t" /* mm0 == 255 - a */
"pmullw %%mm0 , %%mm1 \n\t" /* mm1 == (255 - a) * d */
"paddusw %%mm2 , %%mm1 \n\t" /* mm1 == s + d */
"psrlw $8 , %%mm1 \n\t"
"packuswb %%mm7 , %%mm1 \n\t"
"por %%mm5 , %%mm1 \n\t" /* mm1 = 0x.....ff */
"movd %%mm1 , (%3) \n\t" /* dest = mm1 */
"add $4 , %1 \n\t"
"add $4 , %0 \n\t"
"add $1 , %%ebx \n\t"
"cmp %%ebx , %5 \n\t"
"jne 1b \n\t"
"movl %6 , %%ebx \n\t"
:"=r" (src), "=r" (dest)
:"0" (src), "1" (dest), "r" (b_alpha), "r" (src_width), "m" (old_ebx)
:"%eax", "memory"
#ifdef __MMX__
, "mm0", "mm1", "mm2", "mm5", "mm6", "mm7"
#endif
);
/* *INDENT-ON* */
src += src_add;
dest += dest_add;
}
__asm__ __volatile__ ("emms");
}
#endif
/* fill a buffer with a checkerboard pattern */
void
gst_videomixer_fill_ayuv_checker (guint8 * dest, gint width, gint height)
{
gint i, j;
static const 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;
}
}
}
#ifdef BUILD_X86_ASM
void
gst_videomixer_fill_ayuv_color_mmx (guint8 * dest, gint width, gint height,
gint colY, gint colU, gint colV)
{
guint64 val;
guint nvals = width * height;
val = (((guint64) 0xff)) | (((guint64) colY) << 8) |
(((guint64) colU) << 16) | (((guint64) colV) << 24);
val = (val << 32) | val;
/* *INDENT-OFF* */
__asm__ __volatile__ (
"cmp $2 , %2 \n\t"
"jb 2f \n\t"
"movq %4 , %%mm0 \n\t"
"1: \n\t"
"movq %%mm0 , (%1) \n\t"
"sub $2 , %0 \n\t"
"add $8 , %1 \n\t"
"cmp $2 , %2 \n\t"
"jae 1b \n\t"
"emms \n\t"
"2: \n\t"
: "=r" (nvals), "=r" (dest)
: "0" (nvals), "1" (dest), "m" (val)
: "memory"
#ifdef __MMX__
, "mm0"
#endif
);
/* *INDENT-ON* */
if (nvals)
GST_WRITE_UINT32_LE (&dest[-4], (guint32) (val & 0xffffffff));
}
#endif
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