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/*
* Copyright (C) 2010-2015 Hendrik Leppkes
* http://www.1f0.de
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "stdafx.h"
#include "../LAVSubtitleConsumer.h"
#define FAST_DIV255(x) ((((x) + 128) * 257) >> 16)
DECLARE_BLEND_FUNC_IMPL(blend_rgb_c)
{
ASSERT(pixFmt == LAVPixFmt_RGB32 || pixFmt == LAVPixFmt_RGB24);
BYTE *rgbOut = video[0];
const BYTE *subIn = subData[0];
const ptrdiff_t outStride = videoStride[0];
const ptrdiff_t inStride = subStride[0];
const ptrdiff_t dstep = (pixFmt == LAVPixFmt_RGB24) ? 3 : 4;
for (int y = 0; y < size.cy; y++) {
BYTE *dstLine = rgbOut + ((y + position.y) * outStride) + (position.x * dstep);
const BYTE *srcLine = subIn + (y * inStride);
for (int x = 0; x < size.cx; x++) {
const BYTE a = srcLine[3];
switch (a) {
case 0:
break;
case 255:
dstLine[0] = srcLine[0];
dstLine[1] = srcLine[1];
dstLine[2] = srcLine[2];
break;
default:
dstLine[0] = av_clip_uint8(FAST_DIV255(dstLine[0] * (255 - a)) + srcLine[0]);
dstLine[1] = av_clip_uint8(FAST_DIV255(dstLine[1] * (255 - a)) + srcLine[1]);
dstLine[2] = av_clip_uint8(FAST_DIV255(dstLine[2] * (255 - a)) + srcLine[2]);
break;
}
dstLine += dstep;
srcLine += 4;
}
}
return S_OK;
}
template <class pixT, int nv12>
DECLARE_BLEND_FUNC_IMPL(blend_yuv_c)
{
ASSERT(pixFmt == LAVPixFmt_YUV420 || pixFmt == LAVPixFmt_NV12 || pixFmt == LAVPixFmt_YUV422 || pixFmt == LAVPixFmt_YUV444 || pixFmt == LAVPixFmt_YUV420bX || pixFmt == LAVPixFmt_YUV422bX || pixFmt == LAVPixFmt_YUV444bX);
BYTE *y = video[0];
BYTE *u = video[1];
BYTE *v = video[2];
const BYTE *subY = subData[0];
const BYTE *subU = subData[1];
const BYTE *subV = subData[2];
const BYTE *subA = subData[3];
const ptrdiff_t outStride = videoStride[0];
const ptrdiff_t outStrideUV = videoStride[1];
const ptrdiff_t inStride = subStride[0];
const ptrdiff_t inStrideUV = subStride[1];
int line, col;
int w = size.cx, h = size.cy;
int yPos = position.y;
int xPos = position.x;
const int hsub = nv12 || (pixFmt == LAVPixFmt_YUV420 || pixFmt == LAVPixFmt_YUV420bX || pixFmt == LAVPixFmt_NV12);
const int vsub = nv12 || (pixFmt != LAVPixFmt_YUV444 && pixFmt != LAVPixFmt_YUV444bX);
const int shift = sizeof(pixT) > 1 ? bpp - 8 : 0;
for (line = 0; line < h; line++) {
pixT *dstY = (pixT *)(y + ((line + yPos) * outStride)) + xPos;
const BYTE *srcY = subY + (line * inStride);
const BYTE *srcA = subA + (line * inStride);
for (col = 0; col < w; col++) {
switch (srcA[col]) {
case 0:
break;
case 255:
dstY[col] = srcY[col] << shift;
break;
default:
dstY[col] = FAST_DIV255(dstY[col] * (255 - srcA[col]) + (srcY[col] << shift) * srcA[col]);
break;
}
}
}
if (hsub) {
w >>= 1;
xPos >>= 1;
}
if (vsub) {
h >>= 1;
yPos >>= 1;
}
for (line = 0; line < h; line++) {
pixT *dstUV = (pixT *)(u + (line + yPos) * outStrideUV) + (xPos << 1);
pixT *dstU = (pixT *)(u + (line + yPos) * outStrideUV) + xPos;
const BYTE *srcU = subU + line * inStrideUV;
pixT *dstV = (pixT *)(v + (line + yPos) * outStrideUV) + xPos;
const BYTE *srcV = subV + line * inStrideUV;
const BYTE *srcA = subA + (line * inStride * (ptrdiff_t)(1 << hsub));
for (col = 0; col < w; col++) {
// Average Alpha
int alpha;
if (hsub && vsub && col+1 < w && line+1 < h) {
alpha = (srcA[0] + srcA[inStride] + srcA[1] + srcA[inStride+1]) >> 2;
} else if (hsub || vsub) {
int alpha_h = hsub && col+1 < w ? (srcA[0] + srcA[1]) >> 1 : srcA[0];
int alpha_v = vsub && line+1 < h ? (srcA[0] + srcA[inStride]) >> 1 : srcA[0];
alpha = (alpha_h + alpha_v) >> 1;
} else {
alpha = srcA[0];
}
if (nv12) {
switch(alpha) {
case 0:
break;
case 255:
dstUV[(col << 1)+0] = srcU[col] << shift;
dstUV[(col << 1)+1] = srcV[col] << shift;
break;
default:
dstUV[(col << 1)+0] = FAST_DIV255(dstUV[(col << 1)+0] * (255 - alpha) + (srcU[col] << shift) * alpha);
dstUV[(col << 1)+1] = FAST_DIV255(dstUV[(col << 1)+1] * (255 - alpha) + (srcV[col] << shift) * alpha);
break;
}
} else {
switch(alpha) {
case 0:
break;
case 255:
dstU[col] = srcU[col] << shift;
dstV[col] = srcV[col] << shift;
break;
default:
dstU[col] = FAST_DIV255(dstU[col] * (255 - alpha) + (srcU[col] << shift) * alpha);
dstV[col] = FAST_DIV255(dstV[col] * (255 - alpha) + (srcV[col] << shift) * alpha);
break;
}
}
srcA += (ptrdiff_t)(1 << vsub);
}
}
return S_OK;
}
template HRESULT CLAVSubtitleConsumer::blend_yuv_c<uint8_t,1>BLEND_FUNC_PARAMS;
template HRESULT CLAVSubtitleConsumer::blend_yuv_c<uint8_t,0>BLEND_FUNC_PARAMS;
template HRESULT CLAVSubtitleConsumer::blend_yuv_c<uint16_t,0>BLEND_FUNC_PARAMS;
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