swscale.c

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/*
 * 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 "config.h"
#include "libavutil/attributes.h"
#include "libswscale/swscale.h"
#include "libswscale/swscale_internal.h"
#include "libavutil/arm/cpu.h"
 
void ff_hscale_8_to_15_neon(SwsContext *c, int16_t *dst, int dstW,
                            const uint8_t *src, const int16_t *filter,
                            const int32_t *filterPos, int filterSize);
 
void ff_yuv2planeX_8_neon(const int16_t *filter, int filterSize,
                          const int16_t **src, uint8_t *dest, int dstW,
                          const uint8_t *dither, int offset);
 
av_cold void ff_sws_init_swscale_arm(SwsContext *c)
{
    int cpu_flags = av_get_cpu_flags();
 
    if (have_neon(cpu_flags)) {
        if (c->srcBpc == 8 && c->dstBpc <= 14 &&
            (c->hLumFilterSize % 8) == 0 &&
            (c->hChrFilterSize % 8) == 0)
        {
            c->hyScale = c->hcScale = ff_hscale_8_to_15_neon;
        }
        if (c->dstBpc == 8) {
            c->yuv2planeX = ff_yuv2planeX_8_neon;
        }
    }
}