diff options
Diffstat (limited to 'libavutil/fixed_dsp.h')
| -rw-r--r-- | libavutil/fixed_dsp.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/libavutil/fixed_dsp.h b/libavutil/fixed_dsp.h index ff6f36599a..03987adddc 100644 --- a/libavutil/fixed_dsp.h +++ b/libavutil/fixed_dsp.h @@ -54,8 +54,13 @@ #include "libavcodec/mathops.h" typedef struct AVFixedDSPContext { + /* Assume len is a multiple of 16, and arrays are 32-byte aligned */ + /* Results of multiplications are scaled down by 31 bit (and rounded) if not + * stated otherwise */ + /** * Overlap/add with window function. + * Result is scaled down by "bits" bits. * Used primarily by MDCT-based audio codecs. * Source and destination vectors must overlap exactly or not at all. * @@ -92,6 +97,60 @@ typedef struct AVFixedDSPContext { */ void (*vector_fmul_window)(int32_t *dst, const int32_t *src0, const int32_t *src1, const int32_t *win, int len); + /** + * Fixed-point multiplication that calculates the entry wise product of two + * vectors of integers and stores the result in a vector of integers. + * + * @param dst output vector + * constraints: 32-byte aligned + * @param src0 first input vector + * constraints: 32-byte aligned + * @param src1 second input vector + * constraints: 32-byte aligned + * @param len number of elements in the input + * constraints: multiple of 16 + */ + void (*vector_fmul)(int *dst, const int *src0, const int *src1, + int len); + + void (*vector_fmul_reverse)(int *dst, const int *src0, const int *src1, int len); + /** + * Calculate the entry wise product of two vectors of integers, add a third vector of + * integers and store the result in a vector of integers. + * + * @param dst output vector + * constraints: 32-byte aligned + * @param src0 first input vector + * constraints: 32-byte aligned + * @param src1 second input vector + * constraints: 32-byte aligned + * @param src2 third input vector + * constraints: 32-byte aligned + * @param len number of elements in the input + * constraints: multiple of 16 + */ + void (*vector_fmul_add)(int *dst, const int *src0, const int *src1, + const int *src2, int len); + + /** + * Calculate the scalar product of two vectors of integers. + * + * @param v1 first vector, 16-byte aligned + * @param v2 second vector, 16-byte aligned + * @param len length of vectors, multiple of 4 + * + * @return sum of elementwise products + */ + int (*scalarproduct_fixed)(const int *v1, const int *v2, int len); + + /** + * Calculate the sum and difference of two vectors of integers. + * + * @param v1 first input vector, sum output, 16-byte aligned + * @param v2 second input vector, difference output, 16-byte aligned + * @param len length of vectors, multiple of 4 + */ + void (*butterflies_fixed)(int *av_restrict v1, int *av_restrict v2, int len); } AVFixedDSPContext; /** |