mirror of
https://github.com/FFmpeg/FFmpeg.git
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203 lines
7.2 KiB
C
203 lines
7.2 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVUTIL_FLOAT_DSP_H
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#define AVUTIL_FLOAT_DSP_H
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#include "config.h"
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typedef struct AVFloatDSPContext {
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/**
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* Calculate the entry wise product of two vectors of floats and store the result in
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* a vector of floats.
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*
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* @param dst output vector
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* constraints: 32-byte aligned
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* @param src0 first input vector
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* constraints: 32-byte aligned
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* @param src1 second input vector
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* constraints: 32-byte aligned
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* @param len number of elements in the input
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* constraints: multiple of 16
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*/
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void (*vector_fmul)(float *dst, const float *src0, const float *src1,
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int len);
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/**
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* Multiply a vector of floats by a scalar float and add to
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* destination vector. Source and destination vectors must
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* overlap exactly or not at all.
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*
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* @param dst result vector
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* constraints: 32-byte aligned
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* @param src input vector
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* constraints: 32-byte aligned
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* @param mul scalar value
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* @param len length of vector
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* constraints: multiple of 16
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*/
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void (*vector_fmac_scalar)(float *dst, const float *src, float mul,
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int len);
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/**
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* Multiply a vector of doubles by a scalar double and add to
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* destination vector. Source and destination vectors must
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* overlap exactly or not at all.
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*
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* @param dst result vector
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* constraints: 32-byte aligned
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* @param src input vector
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* constraints: 32-byte aligned
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* @param mul scalar value
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* @param len length of vector
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* constraints: multiple of 16
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*/
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void (*vector_dmac_scalar)(double *dst, const double *src, double mul,
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int len);
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/**
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* Multiply a vector of floats by a scalar float. Source and
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* destination vectors must overlap exactly or not at all.
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*
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* @param dst result vector
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* constraints: 16-byte aligned
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* @param src input vector
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* constraints: 16-byte aligned
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* @param mul scalar value
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* @param len length of vector
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* constraints: multiple of 4
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*/
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void (*vector_fmul_scalar)(float *dst, const float *src, float mul,
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int len);
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/**
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* Multiply a vector of double by a scalar double. Source and
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* destination vectors must overlap exactly or not at all.
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*
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* @param dst result vector
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* constraints: 32-byte aligned
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* @param src input vector
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* constraints: 32-byte aligned
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* @param mul scalar value
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* @param len length of vector
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* constraints: multiple of 8
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*/
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void (*vector_dmul_scalar)(double *dst, const double *src, double mul,
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int len);
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/**
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* Overlap/add with window function.
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* Used primarily by MDCT-based audio codecs.
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* Source and destination vectors must overlap exactly or not at all.
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*
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* @param dst result vector
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* constraints: 16-byte aligned
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* @param src0 first source vector
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* constraints: 16-byte aligned
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* @param src1 second source vector
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* constraints: 16-byte aligned
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* @param win half-window vector
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* constraints: 16-byte aligned
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* @param len length of vector
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* constraints: multiple of 4
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*/
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void (*vector_fmul_window)(float *dst, const float *src0,
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const float *src1, const float *win, int len);
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/**
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* Calculate the entry wise product of two vectors of floats, add a third vector of
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* floats and store the result in a vector of floats.
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*
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* @param dst output vector
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* constraints: 32-byte aligned
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* @param src0 first input vector
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* constraints: 32-byte aligned
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* @param src1 second input vector
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* constraints: 32-byte aligned
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* @param src2 third input vector
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* constraints: 32-byte aligned
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* @param len number of elements in the input
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* constraints: multiple of 16
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*/
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void (*vector_fmul_add)(float *dst, const float *src0, const float *src1,
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const float *src2, int len);
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/**
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* Calculate the entry wise product of two vectors of floats, and store the result
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* in a vector of floats. The second vector of floats is iterated over
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* in reverse order.
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*
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* @param dst output vector
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* constraints: 32-byte aligned
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* @param src0 first input vector
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* constraints: 32-byte aligned
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* @param src1 second input vector
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* constraints: 32-byte aligned
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* @param len number of elements in the input
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* constraints: multiple of 16
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*/
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void (*vector_fmul_reverse)(float *dst, const float *src0,
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const float *src1, int len);
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/**
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* Calculate the sum and difference of two vectors of floats.
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*
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* @param v1 first input vector, sum output, 16-byte aligned
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* @param v2 second input vector, difference output, 16-byte aligned
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* @param len length of vectors, multiple of 4
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*/
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void (*butterflies_float)(float *av_restrict v1, float *av_restrict v2, int len);
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/**
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* Calculate the scalar product of two vectors of floats.
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*
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* @param v1 first vector, 16-byte aligned
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* @param v2 second vector, 16-byte aligned
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* @param len length of vectors, multiple of 4
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*
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* @return sum of elementwise products
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*/
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float (*scalarproduct_float)(const float *v1, const float *v2, int len);
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} AVFloatDSPContext;
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/**
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* Return the scalar product of two vectors.
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*
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* @param v1 first input vector
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* @param v2 first input vector
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* @param len number of elements
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*
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* @return sum of elementwise products
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*/
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float avpriv_scalarproduct_float_c(const float *v1, const float *v2, int len);
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void ff_float_dsp_init_aarch64(AVFloatDSPContext *fdsp);
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void ff_float_dsp_init_arm(AVFloatDSPContext *fdsp);
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void ff_float_dsp_init_ppc(AVFloatDSPContext *fdsp, int strict);
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void ff_float_dsp_init_x86(AVFloatDSPContext *fdsp);
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void ff_float_dsp_init_mips(AVFloatDSPContext *fdsp);
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/**
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* Allocate a float DSP context.
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*
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* @param strict setting to non-zero avoids using functions which may not be IEEE-754 compliant
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*/
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AVFloatDSPContext *avpriv_float_dsp_alloc(int strict);
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#endif /* AVUTIL_FLOAT_DSP_H */
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