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FFmpeg/libswscale/vscale.c

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/*
* Copyright (C) 2015 Pedro Arthur <bygrandao@gmail.com>
*
* 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
*/
#include "swscale_internal.h"
typedef struct VScalerContext
{
uint16_t *filter[2];
int32_t *filter_pos;
int filter_size;
int isMMX;
void *pfn;
yuv2packedX_fn yuv2packedX;
} VScalerContext;
static int lum_planar_vscale(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
{
VScalerContext *inst = desc->instance;
int dstW = desc->dst->width;
int first = FFMAX(1-inst->filter_size, inst->filter_pos[sliceY]);
int sp = first - desc->src->plane[0].sliceY;
int dp = sliceY - desc->dst->plane[0].sliceY;
uint8_t **src = desc->src->plane[0].line + sp;
uint8_t **dst = desc->dst->plane[0].line + dp;
uint16_t *filter = inst->filter[0] + (inst->isMMX ? 0 : sliceY * inst->filter_size);
if (inst->filter_size == 1)
((yuv2planar1_fn)inst->pfn)((const int16_t*)src[0], dst[0], dstW, c->lumDither8, 0);
else
((yuv2planarX_fn)inst->pfn)(filter, inst->filter_size, (const int16_t**)src, dst[0], dstW, c->lumDither8, 0);
if (desc->alpha) {
int sp = first - desc->src->plane[3].sliceY;
int dp = sliceY - desc->dst->plane[3].sliceY;
uint8_t **src = desc->src->plane[3].line + sp;
uint8_t **dst = desc->dst->plane[3].line + dp;
uint16_t *filter = inst->filter[1] + (inst->isMMX ? 0 : sliceY * inst->filter_size);
if (inst->filter_size == 1)
((yuv2planar1_fn)inst->pfn)((const int16_t*)src[0], dst[0], dstW, c->lumDither8, 0);
else
((yuv2planarX_fn)inst->pfn)(filter, inst->filter_size, (const int16_t**)src, dst[0], dstW, c->lumDither8, 0);
}
return 1;
}
static int chr_planar_vscale(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
{
const int chrSkipMask = (1 << desc->dst->v_chr_sub_sample) - 1;
if (sliceY & chrSkipMask)
return 0;
else {
VScalerContext *inst = desc->instance;
int dstW = AV_CEIL_RSHIFT(desc->dst->width, desc->dst->h_chr_sub_sample);
int chrSliceY = sliceY >> desc->dst->v_chr_sub_sample;
int first = FFMAX(1-inst->filter_size, inst->filter_pos[chrSliceY]);
int sp1 = first - desc->src->plane[1].sliceY;
int sp2 = first - desc->src->plane[2].sliceY;
int dp1 = chrSliceY - desc->dst->plane[1].sliceY;
int dp2 = chrSliceY - desc->dst->plane[2].sliceY;
uint8_t **src1 = desc->src->plane[1].line + sp1;
uint8_t **src2 = desc->src->plane[2].line + sp2;
uint8_t **dst1 = desc->dst->plane[1].line + dp1;
uint8_t **dst2 = desc->dst->plane[2].line + dp2;
uint16_t *filter = inst->filter[0] + (inst->isMMX ? 0 : chrSliceY * inst->filter_size);
if (c->yuv2nv12cX) {
((yuv2interleavedX_fn)inst->pfn)(c, filter, inst->filter_size, (const int16_t**)src1, (const int16_t**)src2, dst1[0], dstW);
} else if (inst->filter_size == 1) {
((yuv2planar1_fn)inst->pfn)((const int16_t*)src1[0], dst1[0], dstW, c->chrDither8, 0);
((yuv2planar1_fn)inst->pfn)((const int16_t*)src2[0], dst2[0], dstW, c->chrDither8, 3);
} else {
((yuv2planarX_fn)inst->pfn)(filter, inst->filter_size, (const int16_t**)src1, dst1[0], dstW, c->chrDither8, 0);
((yuv2planarX_fn)inst->pfn)(filter, inst->filter_size, (const int16_t**)src2, dst2[0], dstW, c->chrDither8, inst->isMMX ? (c->uv_offx2 >> 1) : 3);
}
}
return 1;
}
static int packed_vscale(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
{
VScalerContext *inst = desc->instance;
int dstW = desc->dst->width;
int chrSliceY = sliceY >> desc->dst->v_chr_sub_sample;
int lum_fsize = inst[0].filter_size;
int chr_fsize = inst[1].filter_size;
uint16_t *lum_filter = inst[0].filter[0];
uint16_t *chr_filter = inst[1].filter[0];
int firstLum = FFMAX(1-lum_fsize, inst[0].filter_pos[ sliceY]);
int firstChr = FFMAX(1-chr_fsize, inst[1].filter_pos[chrSliceY]);
int sp0 = firstLum - desc->src->plane[0].sliceY;
int sp1 = firstChr - desc->src->plane[1].sliceY;
int sp2 = firstChr - desc->src->plane[2].sliceY;
int sp3 = firstLum - desc->src->plane[3].sliceY;
int dp = sliceY - desc->dst->plane[0].sliceY;
uint8_t **src0 = desc->src->plane[0].line + sp0;
uint8_t **src1 = desc->src->plane[1].line + sp1;
uint8_t **src2 = desc->src->plane[2].line + sp2;
uint8_t **src3 = desc->alpha ? desc->src->plane[3].line + sp3 : NULL;
uint8_t **dst = desc->dst->plane[0].line + dp;
if (c->yuv2packed1 && lum_fsize == 1 && chr_fsize == 1) { // unscaled RGB
((yuv2packed1_fn)inst->pfn)(c, (const int16_t*)*src0, (const int16_t**)src1, (const int16_t**)src2,
(const int16_t*)(desc->alpha ? *src3 : NULL), *dst, dstW, 0, sliceY);
} else if (c->yuv2packed1 && lum_fsize == 1 && chr_fsize == 2 &&
chr_filter[2 * chrSliceY + 1] + chr_filter[2 * chrSliceY] == 4096 &&
chr_filter[2 * chrSliceY + 1] <= 4096U) { // unscaled RGB
int chrAlpha = chr_filter[2 * chrSliceY + 1];
((yuv2packed1_fn)inst->pfn)(c, (const int16_t*)*src0, (const int16_t**)src1, (const int16_t**)src2,
(const int16_t*)(desc->alpha ? *src3 : NULL), *dst, dstW, chrAlpha, sliceY);
} else if (c->yuv2packed2 && lum_fsize == 2 && chr_fsize == 2 &&
lum_filter[2 * sliceY + 1] + lum_filter[2 * sliceY] == 4096 &&
lum_filter[2 * sliceY + 1] <= 4096U &&
chr_filter[2 * chrSliceY + 1] + chr_filter[2 * chrSliceY] == 4096 &&
chr_filter[2 * chrSliceY + 1] <= 4096U
) { // bilinear upscale RGB
int lumAlpha = lum_filter[2 * sliceY + 1];
int chrAlpha = chr_filter[2 * chrSliceY + 1];
c->lumMmxFilter[2] =
c->lumMmxFilter[3] = lum_filter[2 * sliceY] * 0x10001;
c->chrMmxFilter[2] =
c->chrMmxFilter[3] = chr_filter[2 * chrSliceY] * 0x10001;
((yuv2packed2_fn)inst->pfn)(c, (const int16_t**)src0, (const int16_t**)src1, (const int16_t**)src2, (const int16_t**)src3,
*dst, dstW, lumAlpha, chrAlpha, sliceY);
} else { // general RGB
if ((c->yuv2packed1 && lum_fsize == 1 && chr_fsize == 2) ||
(c->yuv2packed2 && lum_fsize == 2 && chr_fsize == 2)) {
if (!c->warned_unuseable_bilinear)
av_log(c, AV_LOG_INFO, "Optimized 2 tap filter code cannot be used\n");
c->warned_unuseable_bilinear = 1;
}
inst->yuv2packedX(c, lum_filter + sliceY * lum_fsize,
(const int16_t**)src0, lum_fsize, chr_filter + chrSliceY * chr_fsize,
(const int16_t**)src1, (const int16_t**)src2, chr_fsize, (const int16_t**)src3, *dst, dstW, sliceY);
}
return 1;
}
static int any_vscale(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
{
VScalerContext *inst = desc->instance;
int dstW = desc->dst->width;
int chrSliceY = sliceY >> desc->dst->v_chr_sub_sample;
int lum_fsize = inst[0].filter_size;
int chr_fsize = inst[1].filter_size;
uint16_t *lum_filter = inst[0].filter[0];
uint16_t *chr_filter = inst[1].filter[0];
int firstLum = FFMAX(1-lum_fsize, inst[0].filter_pos[ sliceY]);
int firstChr = FFMAX(1-chr_fsize, inst[1].filter_pos[chrSliceY]);
int sp0 = firstLum - desc->src->plane[0].sliceY;
int sp1 = firstChr - desc->src->plane[1].sliceY;
int sp2 = firstChr - desc->src->plane[2].sliceY;
int sp3 = firstLum - desc->src->plane[3].sliceY;
int dp0 = sliceY - desc->dst->plane[0].sliceY;
int dp1 = chrSliceY - desc->dst->plane[1].sliceY;
int dp2 = chrSliceY - desc->dst->plane[2].sliceY;
int dp3 = sliceY - desc->dst->plane[3].sliceY;
uint8_t **src0 = desc->src->plane[0].line + sp0;
uint8_t **src1 = desc->src->plane[1].line + sp1;
uint8_t **src2 = desc->src->plane[2].line + sp2;
uint8_t **src3 = desc->alpha ? desc->src->plane[3].line + sp3 : NULL;
uint8_t *dst[4] = { desc->dst->plane[0].line[dp0],
desc->dst->plane[1].line[dp1],
desc->dst->plane[2].line[dp2],
desc->alpha ? desc->dst->plane[3].line[dp3] : NULL };
av_assert1(!c->yuv2packed1 && !c->yuv2packed2);
((yuv2anyX_fn)inst->pfn)(c, lum_filter + sliceY * lum_fsize,
(const int16_t**)src0, lum_fsize, chr_filter + sliceY * chr_fsize,
(const int16_t**)src1, (const int16_t**)src2, chr_fsize, (const int16_t**)src3, dst, dstW, sliceY);
return 1;
}
int ff_init_vscale(SwsContext *c, SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst)
{
VScalerContext *lumCtx = NULL;
VScalerContext *chrCtx = NULL;
if (isPlanarYUV(c->dstFormat) || (isGray(c->dstFormat) && !isALPHA(c->dstFormat))) {
lumCtx = av_mallocz(sizeof(VScalerContext));
if (!lumCtx)
return AVERROR(ENOMEM);
desc[0].process = lum_planar_vscale;
desc[0].instance = lumCtx;
desc[0].src = src;
desc[0].dst = dst;
desc[0].alpha = c->alpPixBuf != 0;
if (!isGray(c->dstFormat)) {
chrCtx = av_mallocz(sizeof(VScalerContext));
if (!chrCtx)
return AVERROR(ENOMEM);
desc[1].process = chr_planar_vscale;
desc[1].instance = chrCtx;
desc[1].src = src;
desc[1].dst = dst;
}
} else {
lumCtx = av_mallocz_array(sizeof(VScalerContext), 2);
if (!lumCtx)
return AVERROR(ENOMEM);
chrCtx = &lumCtx[1];
desc[0].process = c->yuv2packedX ? packed_vscale : any_vscale;
desc[0].instance = lumCtx;
desc[0].src = src;
desc[0].dst = dst;
desc[0].alpha = c->alpPixBuf != 0;
}
ff_init_vscale_pfn(c, c->yuv2plane1, c->yuv2planeX, c->yuv2nv12cX,
c->yuv2packed1, c->yuv2packed2, c->yuv2packedX, c->yuv2anyX, c->use_mmx_vfilter);
return 0;
}
void ff_init_vscale_pfn(SwsContext *c,
yuv2planar1_fn yuv2plane1,
yuv2planarX_fn yuv2planeX,
yuv2interleavedX_fn yuv2nv12cX,
yuv2packed1_fn yuv2packed1,
yuv2packed2_fn yuv2packed2,
yuv2packedX_fn yuv2packedX,
yuv2anyX_fn yuv2anyX, int use_mmx)
{
VScalerContext *lumCtx = NULL;
VScalerContext *chrCtx = NULL;
int idx = c->numDesc - (c->is_internal_gamma ? 2 : 1); //FIXME avoid hardcoding indexes
if (isPlanarYUV(c->dstFormat) || (isGray(c->dstFormat) && !isALPHA(c->dstFormat))) {
if (!isGray(c->dstFormat)) {
chrCtx = c->desc[idx].instance;
chrCtx->filter[0] = use_mmx ? (int16_t*)c->chrMmxFilter : c->vChrFilter;
chrCtx->filter_size = c->vChrFilterSize;
chrCtx->filter_pos = c->vChrFilterPos;
chrCtx->isMMX = use_mmx;
--idx;
if (yuv2nv12cX) chrCtx->pfn = yuv2nv12cX;
else if (c->vChrFilterSize == 1) chrCtx->pfn = yuv2plane1;
else chrCtx->pfn = yuv2planeX;
}
lumCtx = c->desc[idx].instance;
lumCtx->filter[0] = use_mmx ? (int16_t*)c->lumMmxFilter : c->vLumFilter;
lumCtx->filter[1] = use_mmx ? (int16_t*)c->alpMmxFilter : c->vLumFilter;
lumCtx->filter_size = c->vLumFilterSize;
lumCtx->filter_pos = c->vLumFilterPos;
lumCtx->isMMX = use_mmx;
if (c->vLumFilterSize == 1) lumCtx->pfn = yuv2plane1;
else lumCtx->pfn = yuv2planeX;
} else {
lumCtx = c->desc[idx].instance;
chrCtx = &lumCtx[1];
lumCtx->filter[0] = c->vLumFilter;
lumCtx->filter_size = c->vLumFilterSize;
lumCtx->filter_pos = c->vLumFilterPos;
chrCtx->filter[0] = c->vChrFilter;
chrCtx->filter_size = c->vChrFilterSize;
chrCtx->filter_pos = c->vChrFilterPos;
lumCtx->isMMX = use_mmx;
chrCtx->isMMX = use_mmx;
if (yuv2packedX) {
if (c->yuv2packed1 && c->vLumFilterSize == 1 && c->vChrFilterSize <= 2)
lumCtx->pfn = yuv2packed1;
else if (c->yuv2packed2 && c->vLumFilterSize == 2 && c->vChrFilterSize == 2)
lumCtx->pfn = yuv2packed2;
lumCtx->yuv2packedX = yuv2packedX;
} else
lumCtx->pfn = yuv2anyX;
}
}