fdctdsp_init.c

Go to the documentation of this file.

/*
 * Copyright (c) 2026 Jia Yuan <yuan.jia@sanechips.com.cn>
 *
 * 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/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/riscv/cpu.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/fdctdsp.h"
#include "fdct.h"
 
av_cold void ff_fdctdsp_init_riscv(FDCTDSPContext *c, AVCodecContext *avctx,
                                     unsigned high_bit_depth)
{
#if HAVE_RVV
    int cpu_flags = av_get_cpu_flags();
    if (!(cpu_flags & AV_CPU_FLAG_RVV_I64) || !ff_rv_vlen_least(128)) {
        return;
    }
    const int dct_algo = avctx->dct_algo;
 
    if (!high_bit_depth) {
        if (dct_algo == FF_DCT_AUTO || dct_algo == FF_DCT_RVV) {
            c->fdct = ff_fdct_rvv;
        }
    }
#endif
}