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106 lines
3.4 KiB
C
106 lines
3.4 KiB
C
/**
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* Copyright (C) 2026 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_DISPATCH_H
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#define SWSCALE_OPS_DISPATCH_H
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#include <assert.h>
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#include "libavutil/frame.h"
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#include "graph.h"
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/**
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* Global execution context for all compiled functions.
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*
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* Note: This struct is hard-coded in assembly, so do not change the layout
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* without updating the corresponding assembly definitions.
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*/
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typedef struct SwsOpExec {
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/* The data pointers point to the first pixel to process */
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const uint8_t *in[4];
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uint8_t *out[4];
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/* Separation between lines in bytes */
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ptrdiff_t in_stride[4];
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ptrdiff_t out_stride[4];
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/* Pointer bump, difference between stride and processed line size */
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ptrdiff_t in_bump[4];
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ptrdiff_t out_bump[4];
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/* Extra metadata, may or may not be useful */
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int32_t width, height; /* Overall image dimensions */
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int32_t slice_y, slice_h; /* Start and height of current slice */
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int32_t block_size_in; /* Size of a block of pixels in bytes */
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int32_t block_size_out;
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/* Subsampling factors for each plane */
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uint8_t in_sub_y[4], out_sub_y[4];
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uint8_t in_sub_x[4], out_sub_x[4];
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} SwsOpExec;
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static_assert(sizeof(SwsOpExec) == 24 * sizeof(void *) +
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6 * sizeof(int32_t) +
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16 * sizeof(uint8_t),
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"SwsOpExec layout mismatch");
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/**
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* Process a given range of pixel blocks.
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*
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* Note: `bx_start` and `bx_end` are in units of `SwsCompiledOp.block_size`.
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*/
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typedef void (*SwsOpFunc)(const SwsOpExec *exec, const void *priv,
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int bx_start, int y_start, int bx_end, int y_end);
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#define SWS_DECL_FUNC(NAME) \
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void NAME(const SwsOpExec *, const void *, int, int, int, int)
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typedef struct SwsCompiledOp {
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/* Function to execute */
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union {
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SwsOpFunc func;
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SwsPassFunc func_opaque;
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};
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/**
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* If `opaque` is true, then `func_opaque`, `priv` and `free` are directly
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* forwarded as `SwsPass.run`, `SwsPass.priv` and `SwsPass.free`
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* respectively.
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*/
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bool opaque;
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/* Execution parameters for all functions */
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int slice_align; /* slice height alignment */
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int cpu_flags; /* active set of CPU flags (informative) */
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/* Execution parameters for non-opaque functions only */
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int block_size; /* number of pixels processed per iteration */
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int over_read; /* implementation over-reads input by this many bytes */
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int over_write; /* implementation over-writes output by this many bytes */
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/* Arbitrary private data */
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void *priv;
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void (*free)(void *priv);
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} SwsCompiledOp;
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void ff_sws_compiled_op_unref(SwsCompiledOp *comp);
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#endif /* SWSCALE_OPS_DISPATCH_H */
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