diff options
Diffstat (limited to 'Blink/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_q31.c')
| -rw-r--r-- | Blink/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_q31.c | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/Blink/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_q31.c b/Blink/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_q31.c deleted file mode 100644 index 934a3fc..0000000 --- a/Blink/Drivers/CMSIS/DSP/Source/TransformFunctions/arm_cfft_q31.c +++ /dev/null @@ -1,252 +0,0 @@ -/* ----------------------------------------------------------------------
- * Project: CMSIS DSP Library
- * Title: arm_cfft_q31.c
- * Description: Combined Radix Decimation in Frequency CFFT fixed point processing function
- *
- * $Date: 27. January 2017
- * $Revision: V.1.5.1
- *
- * Target Processor: Cortex-M cores
- * -------------------------------------------------------------------- */
-/*
- * Copyright (C) 2010-2017 ARM Limited or its affiliates. All rights reserved.
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Licensed under the Apache License, Version 2.0 (the License); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an AS IS BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include "arm_math.h"
-
-extern void arm_radix4_butterfly_q31(
- q31_t * pSrc,
- uint32_t fftLen,
- q31_t * pCoef,
- uint32_t twidCoefModifier);
-
-extern void arm_radix4_butterfly_inverse_q31(
- q31_t * pSrc,
- uint32_t fftLen,
- q31_t * pCoef,
- uint32_t twidCoefModifier);
-
-extern void arm_bitreversal_32(
- uint32_t * pSrc,
- const uint16_t bitRevLen,
- const uint16_t * pBitRevTable);
-
-void arm_cfft_radix4by2_q31(
- q31_t * pSrc,
- uint32_t fftLen,
- const q31_t * pCoef);
-
-void arm_cfft_radix4by2_inverse_q31(
- q31_t * pSrc,
- uint32_t fftLen,
- const q31_t * pCoef);
-
-/**
-* @ingroup groupTransforms
-*/
-
-/**
-* @addtogroup ComplexFFT
-* @{
-*/
-
-/**
-* @details
-* @brief Processing function for the fixed-point complex FFT in Q31 format.
-* @param[in] *S points to an instance of the fixed-point CFFT structure.
-* @param[in, out] *p1 points to the complex data buffer of size <code>2*fftLen</code>. Processing occurs in-place.
-* @param[in] ifftFlag flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform.
-* @param[in] bitReverseFlag flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output.
-* @return none.
-*/
-
-void arm_cfft_q31(
- const arm_cfft_instance_q31 * S,
- q31_t * p1,
- uint8_t ifftFlag,
- uint8_t bitReverseFlag)
-{
- uint32_t L = S->fftLen;
-
- if (ifftFlag == 1U)
- {
- switch (L)
- {
- case 16:
- case 64:
- case 256:
- case 1024:
- case 4096:
- arm_radix4_butterfly_inverse_q31 ( p1, L, (q31_t*)S->pTwiddle, 1 );
- break;
-
- case 32:
- case 128:
- case 512:
- case 2048:
- arm_cfft_radix4by2_inverse_q31 ( p1, L, S->pTwiddle );
- break;
- }
- }
- else
- {
- switch (L)
- {
- case 16:
- case 64:
- case 256:
- case 1024:
- case 4096:
- arm_radix4_butterfly_q31 ( p1, L, (q31_t*)S->pTwiddle, 1 );
- break;
-
- case 32:
- case 128:
- case 512:
- case 2048:
- arm_cfft_radix4by2_q31 ( p1, L, S->pTwiddle );
- break;
- }
- }
-
- if ( bitReverseFlag )
- arm_bitreversal_32((uint32_t*)p1,S->bitRevLength,S->pBitRevTable);
-}
-
-/**
-* @} end of ComplexFFT group
-*/
-
-void arm_cfft_radix4by2_q31(
- q31_t * pSrc,
- uint32_t fftLen,
- const q31_t * pCoef)
-{
- uint32_t i, l;
- uint32_t n2, ia;
- q31_t xt, yt, cosVal, sinVal;
- q31_t p0, p1;
-
- n2 = fftLen >> 1;
- ia = 0;
- for (i = 0; i < n2; i++)
- {
- cosVal = pCoef[2*ia];
- sinVal = pCoef[2*ia + 1];
- ia++;
-
- l = i + n2;
- xt = (pSrc[2 * i] >> 2) - (pSrc[2 * l] >> 2);
- pSrc[2 * i] = (pSrc[2 * i] >> 2) + (pSrc[2 * l] >> 2);
-
- yt = (pSrc[2 * i + 1] >> 2) - (pSrc[2 * l + 1] >> 2);
- pSrc[2 * i + 1] = (pSrc[2 * l + 1] >> 2) + (pSrc[2 * i + 1] >> 2);
-
- mult_32x32_keep32_R(p0, xt, cosVal);
- mult_32x32_keep32_R(p1, yt, cosVal);
- multAcc_32x32_keep32_R(p0, yt, sinVal);
- multSub_32x32_keep32_R(p1, xt, sinVal);
-
- pSrc[2U * l] = p0 << 1;
- pSrc[2U * l + 1U] = p1 << 1;
-
- }
-
- // first col
- arm_radix4_butterfly_q31( pSrc, n2, (q31_t*)pCoef, 2U);
- // second col
- arm_radix4_butterfly_q31( pSrc + fftLen, n2, (q31_t*)pCoef, 2U);
-
- for (i = 0; i < fftLen >> 1; i++)
- {
- p0 = pSrc[4*i+0];
- p1 = pSrc[4*i+1];
- xt = pSrc[4*i+2];
- yt = pSrc[4*i+3];
-
- p0 <<= 1;
- p1 <<= 1;
- xt <<= 1;
- yt <<= 1;
-
- pSrc[4*i+0] = p0;
- pSrc[4*i+1] = p1;
- pSrc[4*i+2] = xt;
- pSrc[4*i+3] = yt;
- }
-
-}
-
-void arm_cfft_radix4by2_inverse_q31(
- q31_t * pSrc,
- uint32_t fftLen,
- const q31_t * pCoef)
-{
- uint32_t i, l;
- uint32_t n2, ia;
- q31_t xt, yt, cosVal, sinVal;
- q31_t p0, p1;
-
- n2 = fftLen >> 1;
- ia = 0;
- for (i = 0; i < n2; i++)
- {
- cosVal = pCoef[2*ia];
- sinVal = pCoef[2*ia + 1];
- ia++;
-
- l = i + n2;
- xt = (pSrc[2 * i] >> 2) - (pSrc[2 * l] >> 2);
- pSrc[2 * i] = (pSrc[2 * i] >> 2) + (pSrc[2 * l] >> 2);
-
- yt = (pSrc[2 * i + 1] >> 2) - (pSrc[2 * l + 1] >> 2);
- pSrc[2 * i + 1] = (pSrc[2 * l + 1] >> 2) + (pSrc[2 * i + 1] >> 2);
-
- mult_32x32_keep32_R(p0, xt, cosVal);
- mult_32x32_keep32_R(p1, yt, cosVal);
- multSub_32x32_keep32_R(p0, yt, sinVal);
- multAcc_32x32_keep32_R(p1, xt, sinVal);
-
- pSrc[2U * l] = p0 << 1;
- pSrc[2U * l + 1U] = p1 << 1;
-
- }
-
- // first col
- arm_radix4_butterfly_inverse_q31( pSrc, n2, (q31_t*)pCoef, 2U);
- // second col
- arm_radix4_butterfly_inverse_q31( pSrc + fftLen, n2, (q31_t*)pCoef, 2U);
-
- for (i = 0; i < fftLen >> 1; i++)
- {
- p0 = pSrc[4*i+0];
- p1 = pSrc[4*i+1];
- xt = pSrc[4*i+2];
- yt = pSrc[4*i+3];
-
- p0 <<= 1;
- p1 <<= 1;
- xt <<= 1;
- yt <<= 1;
-
- pSrc[4*i+0] = p0;
- pSrc[4*i+1] = p1;
- pSrc[4*i+2] = xt;
- pSrc[4*i+3] = yt;
- }
-}
-
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