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66faef3dbe
to avoid pointer casting and UB of calling function with different pointer type. Signed-off-by: Kacper Michajłow <kasper93@gmail.com>
110 lines
3.1 KiB
C
110 lines
3.1 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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#include "ops_backend.h"
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#if AV_GCC_VERSION_AT_LEAST(4, 4)
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#pragma GCC optimize ("finite-math-only")
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#endif
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/* Array-based reference implementation */
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#ifndef SWS_BLOCK_SIZE
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# define SWS_BLOCK_SIZE 32
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#endif
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typedef uint8_t u8block_t[SWS_BLOCK_SIZE];
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typedef uint16_t u16block_t[SWS_BLOCK_SIZE];
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typedef uint32_t u32block_t[SWS_BLOCK_SIZE];
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typedef float f32block_t[SWS_BLOCK_SIZE];
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#define BIT_DEPTH 8
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# include "ops_tmpl_int.c"
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#undef BIT_DEPTH
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#define BIT_DEPTH 16
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# include "ops_tmpl_int.c"
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#undef BIT_DEPTH
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#define BIT_DEPTH 32
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# include "ops_tmpl_int.c"
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# include "ops_tmpl_float.c"
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#undef BIT_DEPTH
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static void process(const SwsOpExec *exec, const void *priv,
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const int bx_start, const int y_start, int bx_end, int y_end)
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{
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const SwsOpChain *chain = priv;
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const SwsOpImpl *impl = chain->impl;
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SwsOpIter iter;
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for (iter.y = y_start; iter.y < y_end; iter.y++) {
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for (int i = 0; i < 4; i++) {
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iter.in[i] = exec->in[i] + (iter.y - y_start) * exec->in_stride[i];
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iter.out[i] = exec->out[i] + (iter.y - y_start) * exec->out_stride[i];
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}
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for (int block = bx_start; block < bx_end; block++) {
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iter.x = block * SWS_BLOCK_SIZE;
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((void (*)(SwsOpIter *, const SwsOpImpl *)) impl->cont)
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(&iter, &impl[1]);
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}
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}
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}
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static int compile(SwsContext *ctx, SwsOpList *ops, SwsCompiledOp *out)
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{
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int ret;
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SwsOpChain *chain = ff_sws_op_chain_alloc();
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if (!chain)
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return AVERROR(ENOMEM);
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static const SwsOpTable *const tables[] = {
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&bitfn(op_table_int, u8),
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&bitfn(op_table_int, u16),
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&bitfn(op_table_int, u32),
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&bitfn(op_table_float, f32),
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};
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do {
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ret = ff_sws_op_compile_tables(tables, FF_ARRAY_ELEMS(tables), ops,
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SWS_BLOCK_SIZE, chain);
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} while (ret == AVERROR(EAGAIN));
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if (ret < 0) {
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ff_sws_op_chain_free(chain);
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return ret;
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}
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*out = (SwsCompiledOp) {
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.func = process,
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.block_size = SWS_BLOCK_SIZE,
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.cpu_flags = chain->cpu_flags,
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.priv = chain,
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.free = ff_sws_op_chain_free_cb,
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};
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return 0;
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}
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const SwsOpBackend backend_c = {
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.name = "c",
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.compile = compile,
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};
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