ac3dsp_init_aarch64.c

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/*
 * Copyright (c) 2024 Geoff Hill <geoff@geoffhill.org>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU 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 <stdint.h>
 
#include "libavutil/arm/cpu.h"
#include "libavutil/attributes.h"
#include "libavcodec/ac3dsp.h"
#include "config.h"
 
void ff_ac3_exponent_min_neon(uint8_t *exp, int num_reuse_blocks, int nb_coefs);
void ff_ac3_extract_exponents_neon(uint8_t *exp, int32_t *coef, int nb_coefs);
void ff_float_to_fixed24_neon(int32_t *dst, const float *src, size_t len);
void ff_ac3_sum_square_butterfly_int32_neon(int64_t sum[4],
                                            const int32_t *coef0,
                                            const int32_t *coef1,
                                            int len);
void ff_ac3_sum_square_butterfly_float_neon(float sum[4],
                                            const float *coef0,
                                            const float *coef1,
                                            int len);
 
av_cold void ff_ac3dsp_init_aarch64(AC3DSPContext *c)
{
    int cpu_flags = av_get_cpu_flags();
    if (!have_neon(cpu_flags)) return;
 
    c->ac3_exponent_min = ff_ac3_exponent_min_neon;
    c->extract_exponents = ff_ac3_extract_exponents_neon;
    c->float_to_fixed24 = ff_float_to_fixed24_neon;
    c->sum_square_butterfly_int32 = ff_ac3_sum_square_butterfly_int32_neon;
    c->sum_square_butterfly_float = ff_ac3_sum_square_butterfly_float_neon;
}