FFmpeg: AVFloatDSPContext Struct Reference

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Data Fields

AVFloatDSPContext Struct Reference

#include <float_dsp.h>

Data Fields

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. More...

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. More...

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. More...

void(* vector_fmul_scalar )(float *dst, const float *src, float mul, int len)

Multiply a vector of floats by a scalar float. More...

void(* vector_dmul_scalar )(double *dst, const double *src, double mul, int len)

Multiply a vector of double by a scalar double. More...

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

Overlap/add with window function. More...

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 result in a vector of floats. More...

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. More...

void(* butterflies_float )(float *av_restrict v1, float *av_restrict v2, int len)

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

float(* scalarproduct_float )(const float *v1, const float *v2, int len)

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

void(* vector_dmul )(double *dst, const double *src0, const double *src1, int len)

Calculate the entry wise product of two vectors of doubles and store the result in a vector of doubles. More...

Detailed Description

Definition at line 24 of file float_dsp.h.

Field Documentation

◆ vector_fmul

void(* AVFloatDSPContext::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.

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 38 of file float_dsp.h.

Referenced by apply_window_and_mdct(), atrac3_decode_init(), avpriv_float_dsp_alloc(), checkasm_check_float_dsp(), ff_atrac3p_generate_tones(), ff_atrac3p_imdct(), ff_float_dsp_init_aarch64(), ff_float_dsp_init_mips(), ff_float_dsp_init_neon(), ff_float_dsp_init_ppc(), ff_float_dsp_init_vfp(), ff_float_dsp_init_x86(), ra288_decode_init(), read_and_decode_spectrum(), sbr_qmf_synthesis(), and windowing_and_mdct_ltp().

◆ vector_fmac_scalar

void(* AVFloatDSPContext::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.

Source and destination vectors must overlap exactly or not at all.

Parameters: dst result vector constraints: 32-byte aligned

src input vector constraints: 32-byte aligned

mul scalar value

len length of vector constraints: multiple of 16

Definition at line 54 of file float_dsp.h.

Referenced by apply_independent_coupling(), avpriv_float_dsp_alloc(), checkasm_check_float_dsp(), ff_atrac3p_power_compensation(), ff_dca_downmix_to_stereo_float(), ff_float_dsp_init_aarch64(), ff_float_dsp_init_neon(), and ff_float_dsp_init_x86().

◆ vector_dmac_scalar

void(* AVFloatDSPContext::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.

Source and destination vectors must overlap exactly or not at all.

Parameters: dst result vector constraints: 32-byte aligned

src input vector constraints: 32-byte aligned

mul scalar value

len length of vector constraints: multiple of 16

Definition at line 70 of file float_dsp.h.

Referenced by avpriv_float_dsp_alloc(), checkasm_check_float_dsp(), and ff_float_dsp_init_x86().

◆ vector_fmul_scalar

void(* AVFloatDSPContext::vector_fmul_scalar) (float *dst, const float *src, float mul, int len)

Multiply a vector of floats by a scalar float.

Source and destination vectors must overlap exactly or not at all.

Parameters: dst result vector constraints: 16-byte aligned

src input vector constraints: 16-byte aligned

mul scalar value

len length of vector constraints: multiple of 4

Definition at line 85 of file float_dsp.h.

Referenced by apply_intensity_stereo(), apply_window_and_mdct(), avpriv_float_dsp_alloc(), checkasm_check_float_dsp(), decode_spectrum_and_dequant(), ff_dca_downmix_to_stereo_float(), ff_float_dsp_init_aarch64(), ff_float_dsp_init_mips(), ff_float_dsp_init_neon(), ff_float_dsp_init_x86(), filter_frame(), pcm_decode_init(), and waves_synth().

◆ vector_dmul_scalar

void(* AVFloatDSPContext::vector_dmul_scalar) (double *dst, const double *src, double mul, int len)

Multiply a vector of double by a scalar double.

Source and destination vectors must overlap exactly or not at all.

Parameters: dst result vector constraints: 32-byte aligned

src input vector constraints: 32-byte aligned

mul scalar value

len length of vector constraints: multiple of 8

Definition at line 100 of file float_dsp.h.

Referenced by avpriv_float_dsp_alloc(), checkasm_check_float_dsp(), ff_float_dsp_init_aarch64(), ff_float_dsp_init_x86(), and filter_frame().

◆ vector_fmul_window

void(* AVFloatDSPContext::vector_fmul_window) (float *dst, const float *src0, const float *src1, const float *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: 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

Definition at line 119 of file float_dsp.h.

Referenced by atrac1_decode_init(), avpriv_float_dsp_alloc(), checkasm_check_float_dsp(), ff_float_dsp_init_aarch64(), ff_float_dsp_init_mips(), ff_float_dsp_init_neon(), ff_float_dsp_init_ppc(), ff_float_dsp_init_vfp(), ff_float_dsp_init_x86(), imdct_and_window(), imdct_and_windowing(), imdct_and_windowing_960(), and imdct_and_windowing_ld().

◆ vector_fmul_add

void(* AVFloatDSPContext::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 result in a vector of floats.

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 137 of file float_dsp.h.

Referenced by avpriv_float_dsp_alloc(), checkasm_check_float_dsp(), ff_float_dsp_init_aarch64(), ff_float_dsp_init_neon(), ff_float_dsp_init_ppc(), ff_float_dsp_init_x86(), and sbr_qmf_synthesis().

◆ vector_fmul_reverse

void(* AVFloatDSPContext::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.

The second vector of floats is iterated over in reverse order.

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 154 of file float_dsp.h.

Referenced by apply_window_and_mdct(), avpriv_float_dsp_alloc(), checkasm_check_float_dsp(), ff_atrac3p_imdct(), ff_float_dsp_init_aarch64(), ff_float_dsp_init_mips(), ff_float_dsp_init_neon(), ff_float_dsp_init_ppc(), ff_float_dsp_init_vfp(), ff_float_dsp_init_x86(), sbr_qmf_analysis(), update_ltp(), and windowing_and_mdct_ltp().

◆ butterflies_float

void(* AVFloatDSPContext::butterflies_float) (float *av_restrict v1, float *av_restrict v2, int len)

Calculate the sum and difference of two vectors of floats.

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 164 of file float_dsp.h.

Referenced by apply_mid_side_stereo(), avpriv_float_dsp_alloc(), checkasm_check_float_dsp(), decode_init(), ff_float_dsp_init_aarch64(), ff_float_dsp_init_mips(), ff_float_dsp_init_neon(), ff_float_dsp_init_vfp(), ff_float_dsp_init_x86(), imc_decode_init(), and imdct_output().

◆ scalarproduct_float

float(* AVFloatDSPContext::scalarproduct_float) (const float *v1, const float *v2, int len)

Calculate the scalar product of two vectors of floats.

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 175 of file float_dsp.h.

Referenced by avpriv_float_dsp_alloc(), checkasm_check_float_dsp(), decode_spectrum_and_dequant(), ff_float_dsp_init_aarch64(), ff_float_dsp_init_neon(), ff_float_dsp_init_x86(), and init().

◆ vector_dmul

void(* AVFloatDSPContext::vector_dmul) (double *dst, const double *src0, const double *src1, int len)

Calculate the entry wise product of two vectors of doubles and store the result in a vector of doubles.

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 190 of file float_dsp.h.

Referenced by avpriv_float_dsp_alloc(), checkasm_check_float_dsp(), and ff_float_dsp_init_x86().

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

libavutil/float_dsp.h

Generated on Wed Aug 24 2022 21:42:50 for FFmpeg by doxygen 1.8.17