| /* |
| * Copyright (c) 2014 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| * |
| */ |
| |
| #include "dl/api/omxtypes.h" |
| #include "dl/sp/api/mipsSP.h" |
| #include "dl/sp/api/omxSP.h" |
| |
| OMXResult omxSP_FFTGetBufSize_R_F32(OMX_INT order, OMX_INT* pSize) { |
| OMX_INT fft_size, offset_lut_size; |
| |
| if (!pSize || (order < 1) || (order > TWIDDLE_TABLE_ORDER)) |
| return OMX_Sts_BadArgErr; |
| |
| /* For order larger than 4, compute Real FFT as Complex FFT of (order - 1). */ |
| if (order > 4) { |
| fft_size = 1 << (order - 1); |
| offset_lut_size = (SUBTRANSFORM_CONST >> (16 - order)) | 1; |
| } else { |
| fft_size = 1 << order; |
| offset_lut_size = (SUBTRANSFORM_CONST >> (17 - order)) | 1; |
| } |
| |
| *pSize = sizeof(MIPSFFTSpec_R_FC32) + |
| /* BitRev Table. */ |
| sizeof(OMX_U16) * fft_size + |
| /* BitRevInv Table. */ |
| sizeof(OMX_U16) * fft_size + |
| /* Offsets table. */ |
| sizeof(OMX_U16) * offset_lut_size + |
| /* Twiddle table */ |
| sizeof(OMX_F32) * (1 << (order - 2)) + |
| /* pBuf. */ |
| sizeof(OMX_F32) * (fft_size << 1) + |
| /* |
| * Extra bytes to get 32 byte alignment of |
| * pBitRev, pBitRevInv, pOffset, pTwiddle and pBuf. |
| */ |
| 155; |
| |
| return OMX_Sts_NoErr; |
| } |