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Diffstat (limited to 'DSP_Lib/Source/TransformFunctions/arm_rfft_fast_init_f32.c')
| -rw-r--r-- | DSP_Lib/Source/TransformFunctions/arm_rfft_fast_init_f32.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/DSP_Lib/Source/TransformFunctions/arm_rfft_fast_init_f32.c b/DSP_Lib/Source/TransformFunctions/arm_rfft_fast_init_f32.c deleted file mode 100644 index ba66980..0000000 --- a/DSP_Lib/Source/TransformFunctions/arm_rfft_fast_init_f32.c +++ /dev/null @@ -1,143 +0,0 @@ -/* ---------------------------------------------------------------------- -* Copyright (C) 2010-2014 ARM Limited. All rights reserved. -* -* $Date: 19. March 2015 -* $Revision: V.1.4.5 -* -* Project: CMSIS DSP Library -* Title: arm_cfft_init_f32.c -* -* Description: Split Radix Decimation in Frequency CFFT Floating point processing function -* -* Target Processor: Cortex-M4/Cortex-M3/Cortex-M0 -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions -* are met: -* - Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* - Redistributions in binary form must reproduce the above copyright -* notice, this list of conditions and the following disclaimer in -* the documentation and/or other materials provided with the -* distribution. -* - Neither the name of ARM LIMITED nor the names of its contributors -* may be used to endorse or promote products derived from this -* software without specific prior written permission. -* -* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS -* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE -* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, -* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, -* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; -* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER -* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT -* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN -* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE -* POSSIBILITY OF SUCH DAMAGE. -* -------------------------------------------------------------------- */ - -#include "arm_math.h" -#include "arm_common_tables.h" - -/** - * @ingroup groupTransforms - */ - -/** - * @addtogroup RealFFT - * @{ - */ - -/** -* @brief Initialization function for the floating-point real FFT. -* @param[in,out] *S points to an arm_rfft_fast_instance_f32 structure. -* @param[in] fftLen length of the Real Sequence. -* @return The function returns ARM_MATH_SUCCESS if initialization is successful or ARM_MATH_ARGUMENT_ERROR if <code>fftLen</code> is not a supported value. -* -* \par Description: -* \par -* The parameter <code>fftLen</code> Specifies length of RFFT/CIFFT process. Supported FFT Lengths are 32, 64, 128, 256, 512, 1024, 2048, 4096. -* \par -* This Function also initializes Twiddle factor table pointer and Bit reversal table pointer. -*/ -arm_status arm_rfft_fast_init_f32( - arm_rfft_fast_instance_f32 * S, - uint16_t fftLen) -{ - arm_cfft_instance_f32 * Sint; - /* Initialise the default arm status */ - arm_status status = ARM_MATH_SUCCESS; - /* Initialise the FFT length */ - Sint = &(S->Sint); - Sint->fftLen = fftLen/2; - S->fftLenRFFT = fftLen; - - /* Initializations of structure parameters depending on the FFT length */ - switch (Sint->fftLen) - { - case 2048u: - /* Initializations of structure parameters for 2048 point FFT */ - /* Initialise the bit reversal table length */ - Sint->bitRevLength = ARMBITREVINDEXTABLE2048_TABLE_LENGTH; - /* Initialise the bit reversal table pointer */ - Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable2048; - /* Initialise the Twiddle coefficient pointers */ - Sint->pTwiddle = (float32_t *) twiddleCoef_2048; - S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_4096; - break; - case 1024u: - Sint->bitRevLength = ARMBITREVINDEXTABLE1024_TABLE_LENGTH; - Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable1024; - Sint->pTwiddle = (float32_t *) twiddleCoef_1024; - S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_2048; - break; - case 512u: - Sint->bitRevLength = ARMBITREVINDEXTABLE_512_TABLE_LENGTH; - Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable512; - Sint->pTwiddle = (float32_t *) twiddleCoef_512; - S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_1024; - break; - case 256u: - Sint->bitRevLength = ARMBITREVINDEXTABLE_256_TABLE_LENGTH; - Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable256; - Sint->pTwiddle = (float32_t *) twiddleCoef_256; - S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_512; - break; - case 128u: - Sint->bitRevLength = ARMBITREVINDEXTABLE_128_TABLE_LENGTH; - Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable128; - Sint->pTwiddle = (float32_t *) twiddleCoef_128; - S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_256; - break; - case 64u: - Sint->bitRevLength = ARMBITREVINDEXTABLE__64_TABLE_LENGTH; - Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable64; - Sint->pTwiddle = (float32_t *) twiddleCoef_64; - S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_128; - break; - case 32u: - Sint->bitRevLength = ARMBITREVINDEXTABLE__32_TABLE_LENGTH; - Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable32; - Sint->pTwiddle = (float32_t *) twiddleCoef_32; - S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_64; - break; - case 16u: - Sint->bitRevLength = ARMBITREVINDEXTABLE__16_TABLE_LENGTH; - Sint->pBitRevTable = (uint16_t *)armBitRevIndexTable16; - Sint->pTwiddle = (float32_t *) twiddleCoef_16; - S->pTwiddleRFFT = (float32_t *) twiddleCoef_rfft_32; - break; - default: - /* Reporting argument error if fftSize is not valid value */ - status = ARM_MATH_ARGUMENT_ERROR; - break; - } - - return (status); -} - -/** - * @} end of RealFFT group - */ |