FFmpeg
audiodsp_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 <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 
48  c->vector_clip_int32 = ff_vector_clip_int32_mmx;
49 
51  c->scalarproduct_int16 = ff_scalarproduct_int16_mmxext;
52 
54  c->vector_clipf = ff_vector_clipf_sse;
55 
56  if (EXTERNAL_SSE2(cpu_flags)) {
57  c->scalarproduct_int16 = ff_scalarproduct_int16_sse2;
59  c->vector_clip_int32 = ff_vector_clip_int32_int_sse2;
60  else
61  c->vector_clip_int32 = ff_vector_clip_int32_sse2;
62  }
63 
65  c->vector_clip_int32 = ff_vector_clip_int32_sse4;
66 }
cpu.h
max
#define max(a, b)
Definition: cuda_runtime.h:33
av_get_cpu_flags
int av_get_cpu_flags(void)
Return the flags which specify extensions supported by the CPU.
Definition: cpu.c:95
cpu_flags
static atomic_int cpu_flags
Definition: cpu.c:50
ff_vector_clip_int32_int_sse2
void ff_vector_clip_int32_int_sse2(int32_t *dst, const int32_t *src, int32_t min, int32_t max, unsigned int len)
ff_vector_clipf_sse
void ff_vector_clipf_sse(float *dst, const float *src, int len, float min, float max)
ff_vector_clip_int32_sse2
void ff_vector_clip_int32_sse2(int32_t *dst, const int32_t *src, int32_t min, int32_t max, unsigned int len)
av_cold
#define av_cold
Definition: attributes.h:90
EXTERNAL_SSE
#define EXTERNAL_SSE(flags)
Definition: cpu.h:58
ff_audiodsp_init_x86
av_cold void ff_audiodsp_init_x86(AudioDSPContext *c)
Definition: audiodsp_init.c:43
src
#define src
Definition: vp8dsp.c:255
ff_vector_clip_int32_sse4
void ff_vector_clip_int32_sse4(int32_t *dst, const int32_t *src, int32_t min, int32_t max, unsigned int len)
c
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
cpu.h
ff_scalarproduct_int16_mmxext
int32_t ff_scalarproduct_int16_mmxext(const int16_t *v1, const int16_t *v2, int order)
attributes.h
EXTERNAL_SSE2
#define EXTERNAL_SSE2(flags)
Definition: cpu.h:59
len
int len
Definition: vorbis_enc_data.h:426
ff_scalarproduct_int16_sse2
int32_t ff_scalarproduct_int16_sse2(const int16_t *v1, const int16_t *v2, int order)
AV_CPU_FLAG_ATOM
#define AV_CPU_FLAG_ATOM
Atom processor, some SSSE3 instructions are slower.
Definition: cpu.h:43
ff_vector_clip_int32_mmx
void ff_vector_clip_int32_mmx(int32_t *dst, const int32_t *src, int32_t min, int32_t max, unsigned int len)
EXTERNAL_SSE4
#define EXTERNAL_SSE4(flags)
Definition: cpu.h:68
audiodsp.h
AudioDSPContext
Definition: audiodsp.h:24
int32_t
int32_t
Definition: audioconvert.c:56
EXTERNAL_MMX
#define EXTERNAL_MMX(flags)
Definition: cpu.h:56
EXTERNAL_MMXEXT
#define EXTERNAL_MMXEXT(flags)
Definition: cpu.h:57
min
float min
Definition: vorbis_enc_data.h:429