41 lines
1.9 KiB
C
41 lines
1.9 KiB
C
/******************************************************************************
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* *
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* Copyright (C) 2023 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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#pragma once
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#define C70 (-0.1666667014f) //(cos(u) + cos(2 * u) + cos(3 * u)) / 3;
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#define C71 (0.7901564837f) //(2 * cos(u) - cos(2 * u) - cos(3 * u)) / 3;
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#define C72 (0.0558542535f) //(cos(u) - 2 * cos(2 * u) + cos(3 * u)) / 3;
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#define C73 (0.7343022227f) //(cos(u) + cos(2 * u) - 2 * cos(3 * u)) / 3;
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#define C74 (-0.4409585893f) //(sin(u) + sin(2 * u) - sin(3 * u)) / 3;
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#define C75 (-0.3408728838f) //(2 * sin(u) - sin(2 * u) + sin(3 * u)) / 3;
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#define C76 (0.5339693427f) //(sin(u) - 2 * sin(2 * u) - sin(3 * u)) / 3;
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#define C77 (-0.8748422265f) //(sin(u) + sin(2 * u) + 2 * sin(3 * u)) / 3;
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#define CPLX_MPY_FFT(re, im, a, b, c, d) \
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{ \
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re = ((a * c) - (b * d)); \
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im = ((a * d) + (b * c)); \
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}
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IA_ERRORCODE iusace_fft_based_mdct(FLOAT64 *ptr_in, FLOAT64 *ptr_out, WORD32 npoints,
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const WORD32 tx_flag, iusace_scratch_mem *pstr_scratch);
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VOID iusace_complex_fft(FLOAT32 *data, WORD32 nlength, iusace_scratch_mem *pstr_scratch);
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