FFmpeg: AVFixedDSPContext Struct Reference

FFmpeg

AVFixedDSPContext Struct Reference

#include <fixed_dsp.h>

Data Fields

void(* vector_fmul_window_scaled )(int16_t *dst, const int32_t *src0, const int32_t *src1, const int32_t *win, int len, uint8_t bits)

Overlap/add with window function. More...

void(* vector_fmul_window )(int32_t *dst, const int32_t *src0, const int32_t *src1, const int32_t *win, int len)

Overlap/add with window function. More...

void(* vector_fmul )(int *dst, const int *src0, const int *src1, 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. More...

void(* vector_fmul_reverse )(int *dst, const int *src0, const int *src1, int len)

void(* vector_fmul_add )(int *dst, const int *src0, const int *src1, const int *src2, 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. More...

int(* scalarproduct_fixed )(const int *v1, const int *v2, int len)

Calculate the scalar product of two vectors of integers. More...

void(* butterflies_fixed )(int *av_restrict v1, int *av_restrict v2, int len)

Calculate the sum and difference of two vectors of integers. More...

Detailed Description

Definition at line 56 of file fixed_dsp.h.

Field Documentation

void(* AVFixedDSPContext::vector_fmul_window_scaled)(int16_t *dst, const int32_t *src0, const int32_t *src1, const int32_t *win, int len, uint8_t bits)

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.

Parameters: dst result vector constraints: 16-byte aligned

src0 first source vector constraints: 16-byte aligned

src1 second source vector constraints: 16-byte aligned

win half-window vector constraints: 16-byte aligned

len length of vector constraints: multiple of 4

bits scaling parameter

Definition at line 80 of file fixed_dsp.h.

Referenced by avpriv_alloc_fixed_dsp().

void(* AVFixedDSPContext::vector_fmul_window)(int32_t *dst, const int32_t *src0, const int32_t *src1, const int32_t *win, int len)

Overlap/add with window function.

Used primarily by MDCT-based audio codecs. Source and destination vectors must overlap exactly or not at all.

Parameters: dst result vector constraints: 32-byte aligned

src0 first source vector constraints: 16-byte aligned

src1 second source vector constraints: 16-byte aligned

win half-window vector constraints: 16-byte aligned

len length of vector constraints: multiple of 4

Definition at line 98 of file fixed_dsp.h.

Referenced by avpriv_alloc_fixed_dsp().

void(* AVFixedDSPContext::vector_fmul)(int *dst, const int *src0, const int *src1, 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.

Parameters: dst output vector constraints: 32-byte aligned

src0 first input vector constraints: 32-byte aligned

src1 second input vector constraints: 32-byte aligned

len number of elements in the input constraints: multiple of 16

Definition at line 113 of file fixed_dsp.h.

Referenced by avpriv_alloc_fixed_dsp().

void(* AVFixedDSPContext::vector_fmul_reverse)(int *dst, const int *src0, const int *src1, int len)

Definition at line 116 of file fixed_dsp.h.

Referenced by avpriv_alloc_fixed_dsp().

void(* AVFixedDSPContext::vector_fmul_add)(int *dst, const int *src0, const int *src1, const int *src2, 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.

Parameters: dst output vector constraints: 32-byte aligned

src0 first input vector constraints: 32-byte aligned

src1 second input vector constraints: 32-byte aligned

src2 third input vector constraints: 32-byte aligned

len number of elements in the input constraints: multiple of 16

Definition at line 132 of file fixed_dsp.h.

Referenced by avpriv_alloc_fixed_dsp().

int(* AVFixedDSPContext::scalarproduct_fixed)(const int *v1, const int *v2, int len)

Calculate the scalar product of two vectors of integers.

Parameters: v1 first vector, 16-byte aligned

v2 second vector, 16-byte aligned

len length of vectors, multiple of 4

Returns: sum of elementwise products

Definition at line 144 of file fixed_dsp.h.

Referenced by avpriv_alloc_fixed_dsp().

void(* AVFixedDSPContext::butterflies_fixed)(int *av_restrict v1, int *av_restrict v2, int len)

Calculate the sum and difference of two vectors of integers.

Parameters: v1 first input vector, sum output, 16-byte aligned

v2 second input vector, difference output, 16-byte aligned

len length of vectors, multiple of 4

Definition at line 153 of file fixed_dsp.h.

Referenced by avpriv_alloc_fixed_dsp().

The documentation for this struct was generated from the following file:

libavutil/fixed_dsp.h

Generated on Wed Jun 10 2015 01:57:19 for FFmpeg by doxygen 1.8.6