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/*
* Copyright (C) 2024 Niklas Haas
*
* 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
*/
#ifndef SWSCALE_UTILS_H
#define SWSCALE_UTILS_H
#include "libavutil/pixdesc.h"
#include "swscale.h"
enum {
FIELD_TOP, /* top/even rows, or progressive */
FIELD_BOTTOM, /* bottom/odd rows */
};
/* Subset of AVFrame parameters that uniquely determine pixel representation */
typedef struct SwsFormat {
int width, height;
int interlaced;
enum AVPixelFormat format;
enum AVColorRange range;
enum AVColorPrimaries prim;
enum AVColorTransferCharacteristic trc;
enum AVColorSpace csp;
enum AVChromaLocation loc;
const AVPixFmtDescriptor *desc; /* convenience */
} SwsFormat;
/**
* This function also sanitizes and strips the input data, removing irrelevant
* fields for certain formats.
*/
SwsFormat ff_fmt_from_frame(const AVFrame *frame, int field);
static inline int ff_fmt_equal(const SwsFormat *fmt1, const SwsFormat *fmt2)
{
return fmt1->width == fmt2->width &&
fmt1->height == fmt2->height &&
fmt1->interlaced == fmt2->interlaced &&
fmt1->format == fmt2->format &&
fmt1->range == fmt2->range &&
fmt1->prim == fmt2->prim &&
fmt1->trc == fmt2->trc &&
fmt1->csp == fmt2->csp &&
fmt1->loc == fmt2->loc;
}
static inline int ff_fmt_align(enum AVPixelFormat fmt)
{
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
if (desc->flags & AV_PIX_FMT_FLAG_BAYER) {
return 2;
} else {
return 1 << desc->log2_chroma_h;
}
}
int ff_test_fmt(const SwsFormat *fmt, int output);
#endif /* SWSCALE_UTILS_H */
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