FFmpeg  4.0
imgutils_init.c
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1 /*
2  * This file is part of FFmpeg.
3  *
4  * FFmpeg is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * FFmpeg is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with FFmpeg; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include <stddef.h>
20 #include <stdint.h>
21 
22 #include "libavutil/cpu.h"
23 #include "libavutil/error.h"
24 #include "libavutil/imgutils.h"
26 #include "libavutil/internal.h"
27 
28 #include "cpu.h"
29 
30 void ff_image_copy_plane_uc_from_sse4(uint8_t *dst, ptrdiff_t dst_linesize,
31  const uint8_t *src, ptrdiff_t src_linesize,
32  ptrdiff_t bytewidth, int height);
33 
34 int ff_image_copy_plane_uc_from_x86(uint8_t *dst, ptrdiff_t dst_linesize,
35  const uint8_t *src, ptrdiff_t src_linesize,
36  ptrdiff_t bytewidth, int height)
37 {
39  ptrdiff_t bw_aligned = FFALIGN(bytewidth, 64);
40 
41  if (EXTERNAL_SSE4(cpu_flags) &&
42  bw_aligned <= dst_linesize && bw_aligned <= src_linesize)
43  ff_image_copy_plane_uc_from_sse4(dst, dst_linesize, src, src_linesize,
44  bw_aligned, height);
45  else
46  return AVERROR(ENOSYS);
47 
48  return 0;
49 }
misc image utilities
static atomic_int cpu_flags
Definition: cpu.c:50
#define src
Definition: vp8dsp.c:254
#define EXTERNAL_SSE4(flags)
Definition: cpu.h:68
uint8_t
#define height
#define FFALIGN(x, a)
Definition: macros.h:48
error code definitions
int ff_image_copy_plane_uc_from_x86(uint8_t *dst, ptrdiff_t dst_linesize, const uint8_t *src, ptrdiff_t src_linesize, ptrdiff_t bytewidth, int height)
Definition: imgutils_init.c:34
#define AVERROR(e)
Definition: error.h:43
common internal API header
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:93
void ff_image_copy_plane_uc_from_sse4(uint8_t *dst, ptrdiff_t dst_linesize, const uint8_t *src, ptrdiff_t src_linesize, ptrdiff_t bytewidth, int height)