FFmpeg
vf_overlay_init.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2018 Paul B Mahol
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #include "libavutil/attributes.h"
22 #include "libavutil/cpu.h"
23 #include "libavutil/x86/cpu.h"
24 #include "libavfilter/vf_overlay.h"
25 
26 int ff_overlay_row_44_sse4(uint8_t *d, uint8_t *da, uint8_t *s, uint8_t *a,
27  int w, ptrdiff_t alinesize);
28 
29 int ff_overlay_row_20_sse4(uint8_t *d, uint8_t *da, uint8_t *s, uint8_t *a,
30  int w, ptrdiff_t alinesize);
31 
32 int ff_overlay_row_22_sse4(uint8_t *d, uint8_t *da, uint8_t *s, uint8_t *a,
33  int w, ptrdiff_t alinesize);
34 
35 av_cold void ff_overlay_init_x86(OverlayContext *s, int format, int pix_format,
36  int alpha_format, int main_has_alpha)
37 {
39 
40  if (EXTERNAL_SSE4(cpu_flags) &&
43  alpha_format == 0 && main_has_alpha == 0) {
44  s->blend_row[0] = ff_overlay_row_44_sse4;
45  s->blend_row[1] = ff_overlay_row_44_sse4;
46  s->blend_row[2] = ff_overlay_row_44_sse4;
47  }
48 
49  if (EXTERNAL_SSE4(cpu_flags) &&
50  (pix_format == AV_PIX_FMT_YUV420P) &&
52  alpha_format == 0 && main_has_alpha == 0) {
53  s->blend_row[0] = ff_overlay_row_44_sse4;
54  s->blend_row[1] = ff_overlay_row_20_sse4;
55  s->blend_row[2] = ff_overlay_row_20_sse4;
56  }
57 
58  if (EXTERNAL_SSE4(cpu_flags) &&
60  alpha_format == 0 && main_has_alpha == 0) {
61  s->blend_row[0] = ff_overlay_row_44_sse4;
62  s->blend_row[1] = ff_overlay_row_22_sse4;
63  s->blend_row[2] = ff_overlay_row_22_sse4;
64  }
65 }
cpu.h
ff_overlay_row_20_sse4
int ff_overlay_row_20_sse4(uint8_t *d, uint8_t *da, uint8_t *s, uint8_t *a, int w, ptrdiff_t alinesize)
w
uint8_t w
Definition: llviddspenc.c:38
ff_overlay_row_22_sse4
int ff_overlay_row_22_sse4(uint8_t *d, uint8_t *da, uint8_t *s, uint8_t *a, int w, ptrdiff_t alinesize)
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:100
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:52
av_cold
#define av_cold
Definition: attributes.h:90
s
#define s(width, name)
Definition: cbs_vp9.c:256
OVERLAY_FORMAT_YUV422
@ OVERLAY_FORMAT_YUV422
Definition: vf_overlay.h:45
format
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample format(the sample packing is implied by the sample format) and sample rate. The lists are not just lists
vf_overlay.h
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:66
OverlayContext
Definition: vf_overlay.h:54
ff_overlay_row_44_sse4
int ff_overlay_row_44_sse4(uint8_t *d, uint8_t *da, uint8_t *s, uint8_t *a, int w, ptrdiff_t alinesize)
cpu.h
OVERLAY_FORMAT_YUV420
@ OVERLAY_FORMAT_YUV420
Definition: vf_overlay.h:43
a
The reader does not expect b to be semantically here and if the code is changed by maybe adding a a division or other the signedness will almost certainly be mistaken To avoid this confusion a new type was SUINT is the C unsigned type but it holds a signed int to use the same example SUINT a
Definition: undefined.txt:41
attributes.h
ff_overlay_init_x86
av_cold void ff_overlay_init_x86(OverlayContext *s, int format, int pix_format, int alpha_format, int main_has_alpha)
Definition: vf_overlay_init.c:35
EXTERNAL_SSE4
#define EXTERNAL_SSE4(flags)
Definition: cpu.h:68
OVERLAY_FORMAT_GBRP
@ OVERLAY_FORMAT_GBRP
Definition: vf_overlay.h:49
OVERLAY_FORMAT_YUV444
@ OVERLAY_FORMAT_YUV444
Definition: vf_overlay.h:47
d
d
Definition: ffmpeg_filter.c:153