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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 typedef struct AVFloatDSPContext {
23  /**
24  * Calculate the product of two vectors of floats and store the result in
25  * a vector of floats.
26  *
27  * @param dst output vector
28  * constraints: 32-byte aligned
29  * @param src0 first input vector
30  * constraints: 32-byte aligned
31  * @param src1 second input vector
32  * constraints: 32-byte aligned
33  * @param len number of elements in the input
34  * constraints: multiple of 16
35  */
36  void (*vector_fmul)(float *dst, const float *src0, const float *src1,
37  int len);
38 
39  /**
40  * Multiply a vector of floats by a scalar float and add to
41  * destination vector. Source and destination vectors must
42  * overlap exactly or not at all.
43  *
44  * @param dst result vector
45  * constraints: 32-byte aligned
46  * @param src input vector
47  * constraints: 32-byte aligned
48  * @param mul scalar value
49  * @param len length of vector
50  * constraints: multiple of 16
51  */
52  void (*vector_fmac_scalar)(float *dst, const float *src, float mul,
53  int len);
54 
55  /**
56  * Multiply a vector of floats by a scalar float. Source and
57  * destination vectors must overlap exactly or not at all.
58  *
59  * @param dst result vector
60  * constraints: 16-byte aligned
61  * @param src input vector
62  * constraints: 16-byte aligned
63  * @param mul scalar value
64  * @param len length of vector
65  * constraints: multiple of 4
66  */
67  void (*vector_fmul_scalar)(float *dst, const float *src, float mul,
68  int len);
69 
70  /**
71  * Multiply a vector of double by a scalar double. Source and
72  * destination vectors must overlap exactly or not at all.
73  *
74  * @param dst result vector
75  * constraints: 32-byte aligned
76  * @param src input vector
77  * constraints: 32-byte aligned
78  * @param mul scalar value
79  * @param len length of vector
80  * constraints: multiple of 8
81  */
82  void (*vector_dmul_scalar)(double *dst, const double *src, double mul,
83  int len);
85 
86 /**
87  * Initialize a float DSP context.
88  *
89  * @param fdsp float DSP context
90  * @param strict setting to non-zero avoids using functions which may not be IEEE-754 compliant
91  */
92 void avpriv_float_dsp_init(AVFloatDSPContext *fdsp, int strict);
93 
94 
96 void ff_float_dsp_init_ppc(AVFloatDSPContext *fdsp, int strict);
99 
100 #endif /* AVUTIL_FLOAT_DSP_H */