FFmpeg
audiodsp.h
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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 #ifndef AVCODEC_AUDIODSP_H
20 #define AVCODEC_AUDIODSP_H
21 
22 #include <stdint.h>
23 
24 typedef struct AudioDSPContext {
25  /**
26  * Calculate scalar product of two vectors.
27  * @param len length of vectors, should be multiple of 16
28  */
29  int32_t (*scalarproduct_int16)(const int16_t *v1,
30  const int16_t *v2 /* align 16 */, int len);
31 
32  /**
33  * Clip each element in an array of int32_t to a given minimum and
34  * maximum value.
35  * @param dst destination array
36  * constraints: 16-byte aligned
37  * @param src source array
38  * constraints: 16-byte aligned
39  * @param min minimum value
40  * constraints: must be in the range [-(1 << 24), 1 << 24]
41  * @param max maximum value
42  * constraints: must be in the range [-(1 << 24), 1 << 24]
43  * @param len number of elements in the array
44  * constraints: multiple of 32 greater than zero
45  */
47  int32_t max, unsigned int len);
48  /* assume len is a multiple of 16, and arrays are 16-byte aligned */
49  void (*vector_clipf)(float *dst /* align 16 */,
50  const float *src /* align 16 */,
51  int len /* align 16 */,
52  float min, float max);
54 
59 
60 #endif /* AVCODEC_AUDIODSP_H */
#define src
Definition: vp8dsp.c:254
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
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 max(a, b)
Definition: cuda_runtime.h:33
void ff_audiodsp_init_ppc(AudioDSPContext *c)
Definition: audiodsp.c:86
void ff_audiodsp_init(AudioDSPContext *c)
Definition: audiodsp.c:106
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
int32_t
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_audiodsp_init_arm(AudioDSPContext *c)
int len
float min
void ff_audiodsp_init_x86(AudioDSPContext *c)
Definition: audiodsp_init.c:43