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float_dsp.h
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18 
19 #ifndef AVUTIL_FLOAT_DSP_H
20 #define AVUTIL_FLOAT_DSP_H
21 
22 #include "config.h"
23 
24 typedef struct AVFloatDSPContext {
25  /**
26  * Calculate the entry wise product of two vectors of floats and store the result in
27  * a vector of floats.
28  *
29  * @param dst output vector
30  * constraints: 32-byte aligned
31  * @param src0 first input vector
32  * constraints: 32-byte aligned
33  * @param src1 second input vector
34  * constraints: 32-byte aligned
35  * @param len number of elements in the input
36  * constraints: multiple of 16
37  */
38  void (*vector_fmul)(float *dst, const float *src0, const float *src1,
39  int len);
40 
41  /**
42  * Multiply a vector of floats by a scalar float and add to
43  * destination vector. Source and destination vectors must
44  * overlap exactly or not at all.
45  *
46  * @param dst result vector
47  * constraints: 32-byte aligned
48  * @param src input vector
49  * constraints: 32-byte aligned
50  * @param mul scalar value
51  * @param len length of vector
52  * constraints: multiple of 16
53  */
54  void (*vector_fmac_scalar)(float *dst, const float *src, float mul,
55  int len);
56 
57  /**
58  * Multiply a vector of doubles by a scalar double and add to
59  * destination vector. Source and destination vectors must
60  * overlap exactly or not at all.
61  *
62  * @param dst result vector
63  * constraints: 32-byte aligned
64  * @param src input vector
65  * constraints: 32-byte aligned
66  * @param mul scalar value
67  * @param len length of vector
68  * constraints: multiple of 16
69  */
70  void (*vector_dmac_scalar)(double *dst, const double *src, double mul,
71  int len);
72 
73  /**
74  * Multiply a vector of floats by a scalar float. Source and
75  * destination vectors must overlap exactly or not at all.
76  *
77  * @param dst result vector
78  * constraints: 16-byte aligned
79  * @param src input vector
80  * constraints: 16-byte aligned
81  * @param mul scalar value
82  * @param len length of vector
83  * constraints: multiple of 4
84  */
85  void (*vector_fmul_scalar)(float *dst, const float *src, float mul,
86  int len);
87 
88  /**
89  * Multiply a vector of double by a scalar double. Source and
90  * destination vectors must overlap exactly or not at all.
91  *
92  * @param dst result vector
93  * constraints: 32-byte aligned
94  * @param src input vector
95  * constraints: 32-byte aligned
96  * @param mul scalar value
97  * @param len length of vector
98  * constraints: multiple of 8
99  */
100  void (*vector_dmul_scalar)(double *dst, const double *src, double mul,
101  int len);
102 
103  /**
104  * Overlap/add with window function.
105  * Used primarily by MDCT-based audio codecs.
106  * Source and destination vectors must overlap exactly or not at all.
107  *
108  * @param dst result vector
109  * constraints: 16-byte aligned
110  * @param src0 first source vector
111  * constraints: 16-byte aligned
112  * @param src1 second source vector
113  * constraints: 16-byte aligned
114  * @param win half-window vector
115  * constraints: 16-byte aligned
116  * @param len length of vector
117  * constraints: multiple of 4
118  */
119  void (*vector_fmul_window)(float *dst, const float *src0,
120  const float *src1, const float *win, int len);
121 
122  /**
123  * Calculate the entry wise product of two vectors of floats, add a third vector of
124  * floats and store the result in a vector of floats.
125  *
126  * @param dst output vector
127  * constraints: 32-byte aligned
128  * @param src0 first input vector
129  * constraints: 32-byte aligned
130  * @param src1 second input vector
131  * constraints: 32-byte aligned
132  * @param src2 third input vector
133  * constraints: 32-byte aligned
134  * @param len number of elements in the input
135  * constraints: multiple of 16
136  */
137  void (*vector_fmul_add)(float *dst, const float *src0, const float *src1,
138  const float *src2, int len);
139 
140  /**
141  * Calculate the entry wise product of two vectors of floats, and store the result
142  * in a vector of floats. The second vector of floats is iterated over
143  * in reverse order.
144  *
145  * @param dst output vector
146  * constraints: 32-byte aligned
147  * @param src0 first input vector
148  * constraints: 32-byte aligned
149  * @param src1 second input vector
150  * constraints: 32-byte aligned
151  * @param len number of elements in the input
152  * constraints: multiple of 16
153  */
154  void (*vector_fmul_reverse)(float *dst, const float *src0,
155  const float *src1, int len);
156 
157  /**
158  * Calculate the sum and difference of two vectors of floats.
159  *
160  * @param v1 first input vector, sum output, 16-byte aligned
161  * @param v2 second input vector, difference output, 16-byte aligned
162  * @param len length of vectors, multiple of 4
163  */
164  void (*butterflies_float)(float *av_restrict v1, float *av_restrict v2, int len);
165 
166  /**
167  * Calculate the scalar product of two vectors of floats.
168  *
169  * @param v1 first vector, 16-byte aligned
170  * @param v2 second vector, 16-byte aligned
171  * @param len length of vectors, multiple of 4
172  *
173  * @return sum of elementwise products
174  */
175  float (*scalarproduct_float)(const float *v1, const float *v2, int len);
177 
178 /**
179  * Return the scalar product of two vectors.
180  *
181  * @param v1 first input vector
182  * @param v2 first input vector
183  * @param len number of elements
184  *
185  * @return sum of elementwise products
186  */
187 float avpriv_scalarproduct_float_c(const float *v1, const float *v2, int len);
188 
191 void ff_float_dsp_init_ppc(AVFloatDSPContext *fdsp, int strict);
194 
195 /**
196  * Allocate a float DSP context.
197  *
198  * @param strict setting to non-zero avoids using functions which may not be IEEE-754 compliant
199  */
201 
202 #endif /* AVUTIL_FLOAT_DSP_H */
void ff_float_dsp_init_x86(AVFloatDSPContext *fdsp)
float(* scalarproduct_float)(const float *v1, const float *v2, int len)
Calculate the scalar product of two vectors of floats.
Definition: float_dsp.h:175
void(* vector_fmul_reverse)(float *dst, const float *src0, const float *src1, int len)
Calculate the entry wise product of two vectors of floats, and store the result in a vector of floats...
Definition: float_dsp.h:154
#define src
Definition: vp8dsp.c:254
void ff_float_dsp_init_mips(AVFloatDSPContext *fdsp)
void ff_float_dsp_init_aarch64(AVFloatDSPContext *fdsp)
void(* vector_fmac_scalar)(float *dst, const float *src, float mul, int len)
Multiply a vector of floats by a scalar float and add to destination vector.
Definition: float_dsp.h:54
void(* vector_fmul_window)(float *dst, const float *src0, const float *src1, const float *win, int len)
Overlap/add with window function.
Definition: float_dsp.h:119
void(* vector_dmac_scalar)(double *dst, const double *src, double mul, int len)
Multiply a vector of doubles by a scalar double and add to destination vector.
Definition: float_dsp.h:70
void(* vector_fmul)(float *dst, const float *src0, const float *src1, int len)
Calculate the entry wise product of two vectors of floats and store the result in a vector of floats...
Definition: float_dsp.h:38
void(* butterflies_float)(float *av_restrict v1, float *av_restrict v2, int len)
Calculate the sum and difference of two vectors of floats.
Definition: float_dsp.h:164
AVFloatDSPContext * avpriv_float_dsp_alloc(int strict)
Allocate a float DSP context.
Definition: float_dsp.c:127
void(* vector_dmul_scalar)(double *dst, const double *src, double mul, int len)
Multiply a vector of double by a scalar double.
Definition: float_dsp.h:100
typedef void(APIENTRY *FF_PFNGLACTIVETEXTUREPROC)(GLenum texture)
void(* vector_fmul_scalar)(float *dst, const float *src, float mul, int len)
Multiply a vector of floats by a scalar float.
Definition: float_dsp.h:85
#define src1
Definition: h264pred.c:139
float avpriv_scalarproduct_float_c(const float *v1, const float *v2, int len)
Return the scalar product of two vectors.
Definition: float_dsp.c:116
void ff_float_dsp_init_ppc(AVFloatDSPContext *fdsp, int strict)
void(* vector_fmul_add)(float *dst, const float *src0, const float *src1, const float *src2, int len)
Calculate the entry wise product of two vectors of floats, add a third vector of floats and store the...
Definition: float_dsp.h:137
#define src0
Definition: h264pred.c:138
void ff_float_dsp_init_arm(AVFloatDSPContext *fdsp)
int len