FFmpeg
vf_eq_init.c
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1 /*
2  *
3  * Original MPlayer filters by Richard Felker.
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License along
18  * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20  */
21 
22 #include "libavutil/attributes.h"
23 #include "libavutil/cpu.h"
24 #include "libavutil/mem.h"
25 #include "libavutil/x86/cpu.h"
26 #include "libavutil/x86/asm.h"
27 #include "libavfilter/vf_eq.h"
28 
29 extern void ff_process_one_line_mmxext(const uint8_t *src, uint8_t *dst, short contrast,
30  short brightness, int w);
31 extern void ff_process_one_line_sse2(const uint8_t *src, uint8_t *dst, short contrast,
32  short brightness, int w);
33 
34 #if HAVE_X86ASM
35 static void process_mmxext(EQParameters *param, uint8_t *dst, int dst_stride,
36  const uint8_t *src, int src_stride, int w, int h)
37 {
38  short contrast = (short) (param->contrast * 256 * 16);
39  short brightness = ((short) (100.0 * param->brightness + 100.0) * 511)
40  / 200 - 128 - contrast / 32;
41 
42  while (h--) {
43  ff_process_one_line_mmxext(src, dst, contrast, brightness, w);
44  src += src_stride;
45  dst += dst_stride;
46  }
47  emms_c();
48 }
49 
50 static void process_sse2(EQParameters *param, uint8_t *dst, int dst_stride,
51  const uint8_t *src, int src_stride, int w, int h)
52 {
53  short contrast = (short) (param->contrast * 256 * 16);
54  short brightness = ((short) (100.0 * param->brightness + 100.0) * 511)
55  / 200 - 128 - contrast / 32;
56 
57  while (h--) {
58  ff_process_one_line_sse2(src, dst, contrast, brightness, w);
59  src += src_stride;
60  dst += dst_stride;
61  }
62 }
63 #endif
64 
66 {
67 #if HAVE_X86ASM
69  if (EXTERNAL_MMXEXT(cpu_flags)) {
70  eq->process = process_mmxext;
71  }
72  if (EXTERNAL_SSE2(cpu_flags)) {
73  eq->process = process_sse2;
74  }
75 #endif
76 }
av_cold void ff_eq_init_x86(EQContext *eq)
Definition: vf_eq_init.c:65
Memory handling functions.
double contrast
Definition: vf_eq.h:53
static atomic_int cpu_flags
Definition: cpu.c:50
#define src
Definition: vp8dsp.c:254
Macro definitions for various function/variable attributes.
uint8_t
#define av_cold
Definition: attributes.h:82
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:59
void(* process)(struct EQParameters *par, uint8_t *dst, int dst_stride, const uint8_t *src, int src_stride, int w, int h)
Definition: vf_eq.h:97
#define eq(A, B)
Definition: vf_xbr.c:91
uint8_t w
Definition: llviddspenc.c:38
double brightness
Definition: vf_eq.h:53
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:93
#define EXTERNAL_MMXEXT(flags)
Definition: cpu.h:57
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf default minimum maximum flags name is the option keep it simple and lowercase description are short
void ff_process_one_line_mmxext(const uint8_t *src, uint8_t *dst, short contrast, short brightness, int w)
void ff_process_one_line_sse2(const uint8_t *src, uint8_t *dst, short contrast, short brightness, int w)