/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
typedefstruct AVFloatDSPContext { /** * Calculate the entry wise product of two vectors of floats and store the result in * a vector of floats. * * @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)(float *dst, constfloat *src0, constfloat *src1, 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. * * @param dst result vector * constraints: 32-byte aligned * @param src input vector * constraints: 32-byte aligned * @param mul scalar value * @param len length of vector * constraints: multiple of 16
*/ void (*vector_fmac_scalar)(float *dst, constfloat *src, float 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. * * @param dst result vector * constraints: 32-byte aligned * @param src input vector * constraints: 32-byte aligned * @param mul scalar value * @param len length of vector * constraints: multiple of 16
*/ void (*vector_dmac_scalar)(double *dst, constdouble *src, double mul, int len);
/** * Multiply a vector of floats by a scalar float. Source and * destination vectors must overlap exactly or not at all. * * @param dst result vector * constraints: 16-byte aligned * @param src input vector * constraints: 16-byte aligned * @param mul scalar value * @param len length of vector * constraints: multiple of 4
*/ void (*vector_fmul_scalar)(float *dst, constfloat *src, float mul, int len);
/** * Multiply a vector of double by a scalar double. Source and * destination vectors must overlap exactly or not at all. * * @param dst result vector * constraints: 32-byte aligned * @param src input vector * constraints: 32-byte aligned * @param mul scalar value * @param len length of vector * constraints: multiple of 8
*/ void (*vector_dmul_scalar)(double *dst, constdouble *src, double mul, 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. * * @param dst result vector * constraints: 16-byte aligned * @param src0 first source vector * constraints: 16-byte aligned * @param src1 second source vector * constraints: 16-byte aligned * @param win half-window vector * constraints: 16-byte aligned * @param len length of vector * constraints: multiple of 4
*/ void (*vector_fmul_window)(float *dst, constfloat *src0, constfloat *src1, constfloat *win, 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. * * @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)(float *dst, constfloat *src0, constfloat *src1, constfloat *src2, 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. * * @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_reverse)(float *dst, constfloat *src0, constfloat *src1, int len);
/** * Calculate the sum and difference of two vectors of floats. * * @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_float)(float *restrict v1, float *restrict v2, int len);
/** * Calculate the scalar product of two vectors of floats. * * @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
*/ float (*scalarproduct_float)(constfloat *v1, constfloat *v2, int len);
/** * Calculate the entry wise product of two vectors of doubles and store the result in * a vector of doubles. * * @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_dmul)(double *dst, constdouble *src0, constdouble *src1, int len);
/** * Calculate the scalar product of two vectors of doubles. * * @param v1 first vector * constraints: 32-byte aligned * @param v2 second vector * constraints: 32-byte aligned * @param len length of vectors * constraints: multiple of 16 * * @return inner product of the vectors
*/ double (*scalarproduct_double)(constdouble *v1, constdouble *v2,
size_t len);
} AVFloatDSPContext;
/** * Return the scalar product of two vectors of floats. * * @param v1 first input vector * @param v2 first input vector * @param len number of elements * * @return sum of elementwise products
*/ float avpriv_scalarproduct_float_c(constfloat *v1, constfloat *v2, int len);
/** * Return the scalar product of two vectors of doubles. * * @param v1 first input vector * @param v2 first input vector * @param len number of elements * * @return inner product of the vectors
*/ double ff_scalarproduct_double_c(constdouble *v1, constdouble *v2,
size_t len);
/** * Allocate a float DSP context. * * @param strict setting to non-zero avoids using functions which may not be IEEE-754 compliant
*/
AVFloatDSPContext *avpriv_float_dsp_alloc(int strict);
#endif/* AVUTIL_FLOAT_DSP_H */
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