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16e191c8ef
See docs/swscale-v2.txt for an in-depth introduction to the new approach. This commit merely introduces the ops definitions and boilerplate functions. The subsequent commits will flesh out the underlying implementation.
49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/**
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* Copyright (C) 2025 Niklas Haas
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef SWSCALE_OPS_INTERNAL_H
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#define SWSCALE_OPS_INTERNAL_H
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#include "ops.h"
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#define Q(N) ((AVRational) { N, 1 })
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static inline AVRational ff_sws_pixel_expand(SwsPixelType from, SwsPixelType to)
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{
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const int src = ff_sws_pixel_type_size(from);
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const int dst = ff_sws_pixel_type_size(to);
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int scale = 0;
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for (int i = 0; i < dst / src; i++)
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scale = scale << src * 8 | 1;
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return Q(scale);
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}
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static inline void ff_sws_pack_op_decode(const SwsOp *op, uint64_t mask[4], int shift[4])
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{
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const int size = ff_sws_pixel_type_size(op->type) * 8;
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for (int i = 0; i < 4; i++) {
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const int bits = op->pack.pattern[i];
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mask[i] = (UINT64_C(1) << bits) - 1;
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shift[i] = (i ? shift[i - 1] : size) - bits;
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}
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}
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#endif /* SWSCALE_OPS_INTERNAL_H */
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