forked from KolibriOS/kolibrios
157 lines
5.6 KiB
C
157 lines
5.6 KiB
C
/*
|
|
* Microsoft Screen 2 (aka Windows Media Video V9 Screen) decoder
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* Microsoft Screen 2 (aka Windows Media Video V9 Screen) decoder DSP routines
|
|
*/
|
|
|
|
#include "mss2dsp.h"
|
|
#include "libavutil/common.h"
|
|
|
|
static av_always_inline void mss2_blit_wmv9_template(uint8_t *dst,
|
|
int dst_stride,
|
|
int gray,
|
|
int use_mask,
|
|
int maskcolor,
|
|
const uint8_t *mask,
|
|
int mask_stride,
|
|
const uint8_t *srcy,
|
|
int srcy_stride,
|
|
const uint8_t *srcu,
|
|
const uint8_t *srcv,
|
|
int srcuv_stride,
|
|
int w, int h)
|
|
{
|
|
int i, j, k, r = -1;
|
|
while (++r < h) {
|
|
for (i = 0, j = 0, k = 0; i < w; j += (i & 1), i++, k += 3) {
|
|
if (!use_mask || mask[i] == maskcolor) {
|
|
if (gray) {
|
|
dst[k] = dst[k + 1] = dst[k + 2] = 0x80;
|
|
} else {
|
|
int y = srcy[i];
|
|
int u = srcu[j] - 128;
|
|
int v = srcv[j] - 128;
|
|
dst[k] = av_clip_uint8(y + ( 91881 * v + 32768 >> 16));
|
|
dst[k + 1] = av_clip_uint8(y + (-22554 * u - 46802 * v + 32768 >> 16));
|
|
dst[k + 2] = av_clip_uint8(y + (116130 * u + 32768 >> 16));
|
|
}
|
|
}
|
|
}
|
|
mask += mask_stride;
|
|
dst += dst_stride;
|
|
srcy += srcy_stride;
|
|
srcu += srcuv_stride * (r & 1);
|
|
srcv += srcuv_stride * (r & 1);
|
|
}
|
|
}
|
|
|
|
static void mss2_blit_wmv9_c(uint8_t *dst, int dst_stride,
|
|
const uint8_t *srcy, int srcy_stride,
|
|
const uint8_t *srcu, const uint8_t *srcv,
|
|
int srcuv_stride, int w, int h)
|
|
{
|
|
mss2_blit_wmv9_template(dst, dst_stride, 0, 0,
|
|
0, NULL, 0,
|
|
srcy, srcy_stride,
|
|
srcu, srcv, srcuv_stride,
|
|
w, h);
|
|
}
|
|
|
|
static void mss2_blit_wmv9_masked_c(uint8_t *dst, int dst_stride,
|
|
int maskcolor, const uint8_t *mask,
|
|
int mask_stride,
|
|
const uint8_t *srcy, int srcy_stride,
|
|
const uint8_t *srcu, const uint8_t *srcv,
|
|
int srcuv_stride, int w, int h)
|
|
{
|
|
mss2_blit_wmv9_template(dst, dst_stride, 0, 1,
|
|
maskcolor, mask, mask_stride,
|
|
srcy, srcy_stride,
|
|
srcu, srcv, srcuv_stride,
|
|
w, h);
|
|
}
|
|
|
|
static void mss2_gray_fill_masked_c(uint8_t *dst, int dst_stride,
|
|
int maskcolor, const uint8_t *mask,
|
|
int mask_stride, int w, int h)
|
|
{
|
|
mss2_blit_wmv9_template(dst, dst_stride, 1, 1,
|
|
maskcolor, mask, mask_stride,
|
|
NULL, 0,
|
|
NULL, NULL, 0,
|
|
w, h);
|
|
}
|
|
|
|
static void upsample_plane_c(uint8_t *plane, int plane_stride, int w, int h)
|
|
{
|
|
uint8_t *src1, *src2, *dst1, *dst2, *p, a, b;
|
|
int i, j;
|
|
|
|
if(!w || !h)
|
|
return;
|
|
|
|
w += (w & 1);
|
|
h += (h & 1);
|
|
|
|
j = h - 1;
|
|
|
|
memcpy(plane + plane_stride * j,
|
|
plane + plane_stride * (j >> 1),
|
|
w);
|
|
|
|
while ((j -= 2) > 0) {
|
|
dst1 = plane + plane_stride * (j + 1);
|
|
dst2 = plane + plane_stride * j;
|
|
src1 = plane + plane_stride * ((j + 1) >> 1);
|
|
src2 = plane + plane_stride * ( j >> 1);
|
|
|
|
for (i = (w - 1) >> 1; i >= 0; i--) {
|
|
a = src1[i];
|
|
b = src2[i];
|
|
dst1[i] = (3 * a + b + 2) >> 2;
|
|
dst2[i] = (a + 3 * b + 2) >> 2;
|
|
}
|
|
}
|
|
|
|
for (j = h - 1; j >= 0; j--) {
|
|
p = plane + plane_stride * j;
|
|
i = w - 1;
|
|
|
|
p[i] = p[i >> 1];
|
|
|
|
while ((i -= 2) > 0) {
|
|
a = p[ i >> 1];
|
|
b = p[(i + 1) >> 1];
|
|
p[i] = (3 * a + b + 1) >> 2;
|
|
p[i + 1] = (a + 3 * b + 1) >> 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
av_cold void ff_mss2dsp_init(MSS2DSPContext* dsp)
|
|
{
|
|
dsp->mss2_blit_wmv9 = mss2_blit_wmv9_c;
|
|
dsp->mss2_blit_wmv9_masked = mss2_blit_wmv9_masked_c;
|
|
dsp->mss2_gray_fill_masked = mss2_gray_fill_masked_c;
|
|
dsp->upsample_plane = upsample_plane_c;
|
|
}
|