FFmpeg
vf_idet_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 "libavutil/attributes.h"
20 #include "libavutil/cpu.h"
21 #include "libavutil/mem.h"
22 #include "libavutil/x86/asm.h"
23 #include "libavutil/x86/cpu.h"
24 #include "libavfilter/vf_idet.h"
25 
26 #if HAVE_X86ASM
27 
28 /* declares main callable idet_filter_line_{mmx,mmxext,sse2}() */
29 #define FUNC_MAIN_DECL(KIND, SPAN) \
30 int ff_idet_filter_line_##KIND(const uint8_t *a, const uint8_t *b, \
31  const uint8_t *c, int w); \
32 static int idet_filter_line_##KIND(const uint8_t *a, const uint8_t *b, \
33  const uint8_t *c, int w) { \
34  int sum = 0; \
35  const int left_over = w & (SPAN - 1); \
36  w -= left_over; \
37  if (w > 0) \
38  sum += ff_idet_filter_line_##KIND(a, b, c, w); \
39  if (left_over > 0) \
40  sum += ff_idet_filter_line_c(a + w, b + w, c + w, left_over); \
41  return sum; \
42 }
43 
44 
45 #define FUNC_MAIN_DECL_16bit(KIND, SPAN) \
46 int ff_idet_filter_line_16bit_##KIND(const uint16_t *a, const uint16_t *b, \
47  const uint16_t *c, int w); \
48 static int idet_filter_line_16bit_##KIND(const uint16_t *a, const uint16_t *b, \
49  const uint16_t *c, int w) { \
50  int sum = 0; \
51  const int left_over = w & (SPAN - 1); \
52  w -= left_over; \
53  if (w > 0) \
54  sum += ff_idet_filter_line_16bit_##KIND(a, b, c, w); \
55  if (left_over > 0) \
56  sum += ff_idet_filter_line_c_16bit(a + w, b + w, c + w, left_over); \
57  return sum; \
58 }
59 
60 FUNC_MAIN_DECL(sse2, 16)
61 FUNC_MAIN_DECL_16bit(sse2, 8)
62 #if ARCH_X86_32
63 FUNC_MAIN_DECL(mmx, 8)
64 FUNC_MAIN_DECL(mmxext, 8)
65 FUNC_MAIN_DECL_16bit(mmx, 4)
66 #endif
67 
68 #endif
69 av_cold void ff_idet_init_x86(IDETContext *idet, int for_16b)
70 {
71 #if HAVE_X86ASM
72  const int cpu_flags = av_get_cpu_flags();
73 
74 #if ARCH_X86_32
75  if (EXTERNAL_MMX(cpu_flags)) {
76  idet->filter_line = for_16b ? (ff_idet_filter_func)idet_filter_line_16bit_mmx : idet_filter_line_mmx;
77  }
78  if (EXTERNAL_MMXEXT(cpu_flags)) {
79  idet->filter_line = for_16b ? (ff_idet_filter_func)idet_filter_line_16bit_mmx : idet_filter_line_mmxext;
80  }
81 #endif // ARCH_x86_32
82 
83  if (EXTERNAL_SSE2(cpu_flags)) {
84  idet->filter_line = for_16b ? (ff_idet_filter_func)idet_filter_line_16bit_sse2 : idet_filter_line_sse2;
85  }
86 #endif // HAVE_X86ASM
87 }
#define EXTERNAL_MMX(flags)
Definition: cpu.h:56
Memory handling functions.
static atomic_int cpu_flags
Definition: cpu.c:50
Macro definitions for various function/variable attributes.
#define av_cold
Definition: attributes.h:82
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:59
int(* ff_idet_filter_func)(const uint8_t *a, const uint8_t *b, const uint8_t *c, int w)
Definition: vf_idet.h:27
ff_idet_filter_func filter_line
Definition: vf_idet.h:64
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
av_cold void ff_idet_init_x86(IDETContext *idet, int for_16b)
Definition: vf_idet_init.c:69