FFmpeg/libavcodec/arm/h264chroma_init_arm.c

/*
 * ARM NEON optimised H.264 chroma functions
 * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
 *
 * This file is part of Libav.
 *
 * Libav 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.
 *
 * Libav 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 Libav; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <stdint.h>

#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/arm/cpu.h"
#include "libavcodec/h264chroma.h"

void ff_put_h264_chroma_mc8_neon(uint8_t *dst, uint8_t *src, ptrdiff_t stride,
                                 int h, int x, int y);
void ff_put_h264_chroma_mc4_neon(uint8_t *dst, uint8_t *src, ptrdiff_t stride,
                                 int h, int x, int y);
void ff_put_h264_chroma_mc2_neon(uint8_t *dst, uint8_t *src, ptrdiff_t stride,
                                 int h, int x, int y);

void ff_avg_h264_chroma_mc8_neon(uint8_t *dst, uint8_t *src, ptrdiff_t stride,
                                 int h, int x, int y);
void ff_avg_h264_chroma_mc4_neon(uint8_t *dst, uint8_t *src, ptrdiff_t stride,
                                 int h, int x, int y);
void ff_avg_h264_chroma_mc2_neon(uint8_t *dst, uint8_t *src, ptrdiff_t stride,
                                 int h, int x, int y);

av_cold void ff_h264chroma_init_arm(H264ChromaContext *c, int bit_depth)
{
    const int high_bit_depth = bit_depth > 8;
    int cpu_flags = av_get_cpu_flags();

    if (have_neon(cpu_flags) && !high_bit_depth) {
        c->put_h264_chroma_pixels_tab[0] = ff_put_h264_chroma_mc8_neon;
        c->put_h264_chroma_pixels_tab[1] = ff_put_h264_chroma_mc4_neon;
        c->put_h264_chroma_pixels_tab[2] = ff_put_h264_chroma_mc2_neon;

        c->avg_h264_chroma_pixels_tab[0] = ff_avg_h264_chroma_mc8_neon;
        c->avg_h264_chroma_pixels_tab[1] = ff_avg_h264_chroma_mc4_neon;
        c->avg_h264_chroma_pixels_tab[2] = ff_avg_h264_chroma_mc2_neon;
    }
}