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FFmpeg/libswscale/hscale.c
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

291 lines
9.3 KiB
C

/*
* 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 "libavutil/mem.h"
#include "swscale_internal.h"
/// Scaler instance data
typedef struct FilterContext
{
uint16_t *filter;
int *filter_pos;
int filter_size;
int xInc;
} FilterContext;
/// Color conversion instance data
typedef struct ColorContext
{
uint32_t *pal;
} ColorContext;
static int lum_h_scale(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
{
FilterContext *instance = desc->instance;
int srcW = desc->src->width;
int dstW = desc->dst->width;
int xInc = instance->xInc;
int i;
for (i = 0; i < sliceH; ++i) {
uint8_t ** src = desc->src->plane[0].line;
uint8_t ** dst = desc->dst->plane[0].line;
int src_pos = sliceY+i - desc->src->plane[0].sliceY;
int dst_pos = sliceY+i - desc->dst->plane[0].sliceY;
if (c->hyscale_fast) {
c->hyscale_fast(c, (int16_t*)dst[dst_pos], dstW, src[src_pos], srcW, xInc);
} else {
c->hyScale(c, (int16_t*)dst[dst_pos], dstW, (const uint8_t *)src[src_pos], instance->filter,
instance->filter_pos, instance->filter_size);
}
if (c->lumConvertRange)
c->lumConvertRange((int16_t*)dst[dst_pos], dstW);
desc->dst->plane[0].sliceH += 1;
if (desc->alpha) {
src = desc->src->plane[3].line;
dst = desc->dst->plane[3].line;
src_pos = sliceY+i - desc->src->plane[3].sliceY;
dst_pos = sliceY+i - desc->dst->plane[3].sliceY;
desc->dst->plane[3].sliceH += 1;
if (c->hyscale_fast) {
c->hyscale_fast(c, (int16_t*)dst[dst_pos], dstW, src[src_pos], srcW, xInc);
} else {
c->hyScale(c, (int16_t*)dst[dst_pos], dstW, (const uint8_t *)src[src_pos], instance->filter,
instance->filter_pos, instance->filter_size);
}
}
}
return sliceH;
}
static int lum_convert(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
{
int srcW = desc->src->width;
ColorContext * instance = desc->instance;
uint32_t * pal = instance->pal;
int i;
desc->dst->plane[0].sliceY = sliceY;
desc->dst->plane[0].sliceH = sliceH;
desc->dst->plane[3].sliceY = sliceY;
desc->dst->plane[3].sliceH = sliceH;
for (i = 0; i < sliceH; ++i) {
int sp0 = sliceY+i - desc->src->plane[0].sliceY;
int sp1 = ((sliceY+i) >> desc->src->v_chr_sub_sample) - desc->src->plane[1].sliceY;
const uint8_t * src[4] = { desc->src->plane[0].line[sp0],
desc->src->plane[1].line[sp1],
desc->src->plane[2].line[sp1],
desc->src->plane[3].line[sp0]};
uint8_t * dst = desc->dst->plane[0].line[i];
if (c->lumToYV12) {
c->lumToYV12(dst, src[0], src[1], src[2], srcW, pal, c->input_opaque);
} else if (c->readLumPlanar) {
c->readLumPlanar(dst, src, srcW, c->input_rgb2yuv_table, c->input_opaque);
}
if (desc->alpha) {
dst = desc->dst->plane[3].line[i];
if (c->alpToYV12) {
c->alpToYV12(dst, src[3], src[1], src[2], srcW, pal, c->input_opaque);
} else if (c->readAlpPlanar) {
c->readAlpPlanar(dst, src, srcW, NULL, c->input_opaque);
}
}
}
return sliceH;
}
int ff_init_desc_fmt_convert(SwsFilterDescriptor *desc, SwsSlice * src, SwsSlice *dst, uint32_t *pal)
{
ColorContext * li = av_malloc(sizeof(ColorContext));
if (!li)
return AVERROR(ENOMEM);
li->pal = pal;
desc->instance = li;
desc->alpha = isALPHA(src->fmt) && isALPHA(dst->fmt);
desc->src =src;
desc->dst = dst;
desc->process = &lum_convert;
return 0;
}
int ff_init_desc_hscale(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint16_t *filter, int * filter_pos, int filter_size, int xInc)
{
FilterContext *li = av_malloc(sizeof(FilterContext));
if (!li)
return AVERROR(ENOMEM);
li->filter = filter;
li->filter_pos = filter_pos;
li->filter_size = filter_size;
li->xInc = xInc;
desc->instance = li;
desc->alpha = isALPHA(src->fmt) && isALPHA(dst->fmt);
desc->src = src;
desc->dst = dst;
desc->process = &lum_h_scale;
return 0;
}
static int chr_h_scale(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
{
FilterContext *instance = desc->instance;
int srcW = AV_CEIL_RSHIFT(desc->src->width, desc->src->h_chr_sub_sample);
int dstW = AV_CEIL_RSHIFT(desc->dst->width, desc->dst->h_chr_sub_sample);
int xInc = instance->xInc;
uint8_t ** src1 = desc->src->plane[1].line;
uint8_t ** dst1 = desc->dst->plane[1].line;
uint8_t ** src2 = desc->src->plane[2].line;
uint8_t ** dst2 = desc->dst->plane[2].line;
int src_pos1 = sliceY - desc->src->plane[1].sliceY;
int dst_pos1 = sliceY - desc->dst->plane[1].sliceY;
int src_pos2 = sliceY - desc->src->plane[2].sliceY;
int dst_pos2 = sliceY - desc->dst->plane[2].sliceY;
int i;
for (i = 0; i < sliceH; ++i) {
if (c->hcscale_fast) {
c->hcscale_fast(c, (uint16_t*)dst1[dst_pos1+i], (uint16_t*)dst2[dst_pos2+i], dstW, src1[src_pos1+i], src2[src_pos2+i], srcW, xInc);
} else {
c->hcScale(c, (uint16_t*)dst1[dst_pos1+i], dstW, src1[src_pos1+i], instance->filter, instance->filter_pos, instance->filter_size);
c->hcScale(c, (uint16_t*)dst2[dst_pos2+i], dstW, src2[src_pos2+i], instance->filter, instance->filter_pos, instance->filter_size);
}
if (c->chrConvertRange)
c->chrConvertRange((uint16_t*)dst1[dst_pos1+i], (uint16_t*)dst2[dst_pos2+i], dstW);
desc->dst->plane[1].sliceH += 1;
desc->dst->plane[2].sliceH += 1;
}
return sliceH;
}
static int chr_convert(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
{
int srcW = AV_CEIL_RSHIFT(desc->src->width, desc->src->h_chr_sub_sample);
ColorContext * instance = desc->instance;
uint32_t * pal = instance->pal;
int sp0 = (sliceY - (desc->src->plane[0].sliceY >> desc->src->v_chr_sub_sample)) << desc->src->v_chr_sub_sample;
int sp1 = sliceY - desc->src->plane[1].sliceY;
int i;
desc->dst->plane[1].sliceY = sliceY;
desc->dst->plane[1].sliceH = sliceH;
desc->dst->plane[2].sliceY = sliceY;
desc->dst->plane[2].sliceH = sliceH;
for (i = 0; i < sliceH; ++i) {
const uint8_t * src[4] = { desc->src->plane[0].line[sp0+i],
desc->src->plane[1].line[sp1+i],
desc->src->plane[2].line[sp1+i],
desc->src->plane[3].line[sp0+i]};
uint8_t * dst1 = desc->dst->plane[1].line[i];
uint8_t * dst2 = desc->dst->plane[2].line[i];
if (c->chrToYV12) {
c->chrToYV12(dst1, dst2, src[0], src[1], src[2], srcW, pal, c->input_opaque);
} else if (c->readChrPlanar) {
c->readChrPlanar(dst1, dst2, src, srcW, c->input_rgb2yuv_table, c->input_opaque);
}
}
return sliceH;
}
int ff_init_desc_cfmt_convert(SwsFilterDescriptor *desc, SwsSlice * src, SwsSlice *dst, uint32_t *pal)
{
ColorContext * li = av_malloc(sizeof(ColorContext));
if (!li)
return AVERROR(ENOMEM);
li->pal = pal;
desc->instance = li;
desc->src =src;
desc->dst = dst;
desc->process = &chr_convert;
return 0;
}
int ff_init_desc_chscale(SwsFilterDescriptor *desc, SwsSlice *src, SwsSlice *dst, uint16_t *filter, int * filter_pos, int filter_size, int xInc)
{
FilterContext *li = av_malloc(sizeof(FilterContext));
if (!li)
return AVERROR(ENOMEM);
li->filter = filter;
li->filter_pos = filter_pos;
li->filter_size = filter_size;
li->xInc = xInc;
desc->instance = li;
desc->alpha = isALPHA(src->fmt) && isALPHA(dst->fmt);
desc->src = src;
desc->dst = dst;
desc->process = &chr_h_scale;
return 0;
}
static int no_chr_scale(SwsContext *c, SwsFilterDescriptor *desc, int sliceY, int sliceH)
{
desc->dst->plane[1].sliceY = sliceY + sliceH - desc->dst->plane[1].available_lines;
desc->dst->plane[1].sliceH = desc->dst->plane[1].available_lines;
desc->dst->plane[2].sliceY = sliceY + sliceH - desc->dst->plane[2].available_lines;
desc->dst->plane[2].sliceH = desc->dst->plane[2].available_lines;
return 0;
}
int ff_init_desc_no_chr(SwsFilterDescriptor *desc, SwsSlice * src, SwsSlice *dst)
{
desc->src = src;
desc->dst = dst;
desc->alpha = 0;
desc->instance = NULL;
desc->process = &no_chr_scale;
return 0;
}