FFmpeg
audiodsp_init.c
Go to the documentation of this file.
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 <stdint.h>
20 
21 #include "config.h"
22 #include "libavutil/attributes.h"
23 #include "libavutil/cpu.h"
24 #include "libavutil/x86/cpu.h"
25 #include "libavcodec/audiodsp.h"
26 
27 int32_t ff_scalarproduct_int16_mmxext(const int16_t *v1, const int16_t *v2,
28  int order);
29 int32_t ff_scalarproduct_int16_sse2(const int16_t *v1, const int16_t *v2,
30  int order);
31 
33  int32_t min, int32_t max, unsigned int len);
35  int32_t min, int32_t max, unsigned int len);
37  int32_t min, int32_t max, unsigned int len);
39  int32_t min, int32_t max, unsigned int len);
40 void ff_vector_clipf_sse(float *dst, const float *src,
41  int len, float min, float max);
42 
44 {
46 
47  if (EXTERNAL_MMX(cpu_flags))
49 
50  if (EXTERNAL_MMXEXT(cpu_flags))
52 
53  if (EXTERNAL_SSE(cpu_flags))
55 
56  if (EXTERNAL_SSE2(cpu_flags)) {
58  if (cpu_flags & AV_CPU_FLAG_ATOM)
60  else
62  }
63 
64  if (EXTERNAL_SSE4(cpu_flags))
66 }
#define EXTERNAL_MMX(flags)
Definition: cpu.h:56
void ff_vector_clip_int32_int_sse2(int32_t *dst, const int32_t *src, int32_t min, int32_t max, unsigned int len)
void ff_vector_clip_int32_sse2(int32_t *dst, const int32_t *src, int32_t min, int32_t max, unsigned int len)
static atomic_int cpu_flags
Definition: cpu.c:50
#define EXTERNAL_SSE(flags)
Definition: cpu.h:58
#define src
Definition: vp8dsp.c:254
Macro definitions for various function/variable attributes.
void(* vector_clip_int32)(int32_t *dst, const int32_t *src, int32_t min, int32_t max, unsigned int len)
Clip each element in an array of int32_t to a given minimum and maximum value.
Definition: audiodsp.h:46
#define EXTERNAL_SSE4(flags)
Definition: cpu.h:68
#define av_cold
Definition: attributes.h:82
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
void(* vector_clipf)(float *dst, const float *src, int len, float min, float max)
Definition: audiodsp.h:49
#define AV_CPU_FLAG_ATOM
Atom processor, some SSSE3 instructions are slower.
Definition: cpu.h:45
#define max(a, b)
Definition: cuda_runtime.h:33
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:59
void ff_vector_clip_int32_sse4(int32_t *dst, const int32_t *src, int32_t min, int32_t max, unsigned int len)
av_cold void ff_audiodsp_init_x86(AudioDSPContext *c)
Definition: audiodsp_init.c:43
int32_t
int32_t ff_scalarproduct_int16_sse2(const int16_t *v1, const int16_t *v2, int order)
int32_t(* scalarproduct_int16)(const int16_t *v1, const int16_t *v2, int len)
Calculate scalar product of two vectors.
Definition: audiodsp.h:29
void ff_vector_clip_int32_mmx(int32_t *dst, const int32_t *src, int32_t min, int32_t max, unsigned int len)
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
int32_t ff_scalarproduct_int16_mmxext(const int16_t *v1, const int16_t *v2, int order)
int len
float min
void ff_vector_clipf_sse(float *dst, const float *src, int len, float min, float max)