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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
*/
#ifndef AVFILTER_BLACKDETECT_H
#define AVFILTER_BLACKDETECT_H
#include <stddef.h>
#include <stdint.h>
typedef unsigned (*ff_blackdetect_fn)(const uint8_t *src, ptrdiff_t stride,
ptrdiff_t width, ptrdiff_t height,
unsigned threshold);
ff_blackdetect_fn ff_blackdetect_get_fn_x86(int depth);
static unsigned count_pixels8_c(const uint8_t *src, ptrdiff_t stride,
ptrdiff_t width, ptrdiff_t height,
unsigned threshold)
{
unsigned int counter = 0;
while (height--) {
for (int x = 0; x < width; x++)
counter += src[x] <= threshold;
src += stride;
}
return counter;
}
static unsigned count_pixels16_c(const uint8_t *src, ptrdiff_t stride,
ptrdiff_t width, ptrdiff_t height,
unsigned threshold)
{
unsigned int counter = 0;
while (height--) {
const uint16_t *src16 = (const uint16_t *) src;
for (int x = 0; x < width; x++)
counter += src16[x] <= threshold;
src += stride;
}
return counter;
}
static inline ff_blackdetect_fn ff_blackdetect_get_fn(int depth)
{
ff_blackdetect_fn fn = NULL;
#if ARCH_X86
fn = ff_blackdetect_get_fn_x86(depth);
#endif
if (!fn)
fn = depth == 8 ? count_pixels8_c : count_pixels16_c;
return fn;
}
#endif /* AVFILTER_BLACKDETECT_H */
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