dct.h

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/* SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright(c) 2022 Intel Corporation. All rights reserved.
 *
 * Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
 */
 
/* Matrix calculation related functions */
 
#ifndef __SOF_MATH_DCT_H__
#define __SOF_MATH_DCT_H__
 
#include <sof/math/matrix.h>
#include <stdint.h>
#include <string.h>
 
#define DCT_MATRIX_SIZE_MAX 42 /* Max matrix size where cos() argument fits Q7.24 */
 
enum dct_type {
    DCT_I = 0,
    DCT_II,
};
 
struct dct_plan_16 {
    struct mat_matrix_16b *matrix;
    int num_in;
    int num_out;
    enum dct_type type;
    bool ortho;
};
 
int mod_dct_initialize_16(struct processing_module *mod, struct dct_plan_16 *dct);
 
int mod_dct_free_16(struct processing_module *mod, struct dct_plan_16 *dct);
 
#endif /* __SOF_MATH_DCT_H__ */