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| 1 /* Copyright (C) 2013 Google Inc. All rights reserved. | 1 /* Copyright (C) 2013 Google Inc. All rights reserved. |
| 2 * | 2 * |
| 3 * Redistribution and use in source and binary forms, with or without | 3 * Redistribution and use in source and binary forms, with or without |
| 4 * modification, are permitted provided that the following conditions | 4 * modification, are permitted provided that the following conditions |
| 5 * are met: | 5 * are met: |
| 6 * | 6 * |
| 7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
| 8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
| 10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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| 42 // Normal constructor: allocates for a given fftSize. | 42 // Normal constructor: allocates for a given fftSize. |
| 43 FFTFrame::FFTFrame(unsigned fftSize) | 43 FFTFrame::FFTFrame(unsigned fftSize) |
| 44 : m_FFTSize(fftSize), | 44 : m_FFTSize(fftSize), |
| 45 m_log2FFTSize(static_cast<unsigned>(log2(fftSize))), | 45 m_log2FFTSize(static_cast<unsigned>(log2(fftSize))), |
| 46 m_realData(fftSize / 2), | 46 m_realData(fftSize / 2), |
| 47 m_imagData(fftSize / 2), | 47 m_imagData(fftSize / 2), |
| 48 m_forwardContext(nullptr), | 48 m_forwardContext(nullptr), |
| 49 m_inverseContext(nullptr), | 49 m_inverseContext(nullptr), |
| 50 m_complexData(fftSize) { | 50 m_complexData(fftSize) { |
| 51 // We only allow power of two. | 51 // We only allow power of two. |
| 52 DCHECK_EQ(1UL << m_log2FFTSize, m_FFTSize); | 52 ASSERT(1UL << m_log2FFTSize == m_FFTSize); |
| 53 | 53 |
| 54 m_forwardContext = contextForSize(m_log2FFTSize); | 54 m_forwardContext = contextForSize(m_log2FFTSize); |
| 55 m_inverseContext = contextForSize(m_log2FFTSize); | 55 m_inverseContext = contextForSize(m_log2FFTSize); |
| 56 } | 56 } |
| 57 | 57 |
| 58 // Creates a blank/empty frame (interpolate() must later be called). | 58 // Creates a blank/empty frame (interpolate() must later be called). |
| 59 FFTFrame::FFTFrame() | 59 FFTFrame::FFTFrame() |
| 60 : m_FFTSize(0), | 60 : m_FFTSize(0), |
| 61 m_log2FFTSize(0), | 61 m_log2FFTSize(0), |
| 62 m_forwardContext(nullptr), | 62 m_forwardContext(nullptr), |
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| 136 fftData[1] = 0; | 136 fftData[1] = 0; |
| 137 fftData[m_FFTSize] = imag[0]; | 137 fftData[m_FFTSize] = imag[0]; |
| 138 fftData[m_FFTSize + 1] = 0; | 138 fftData[m_FFTSize + 1] = 0; |
| 139 | 139 |
| 140 omxSP_FFTInv_CCSToR_F32(fftData, data, m_inverseContext); | 140 omxSP_FFTInv_CCSToR_F32(fftData, data, m_inverseContext); |
| 141 } | 141 } |
| 142 } | 142 } |
| 143 | 143 |
| 144 OMXFFTSpec_R_F32* FFTFrame::contextForSize(unsigned log2FFTSize) { | 144 OMXFFTSpec_R_F32* FFTFrame::contextForSize(unsigned log2FFTSize) { |
| 145 DCHECK(log2FFTSize); | 145 DCHECK(log2FFTSize); |
| 146 DCHECK_LE(log2FFTSize, kMaxFFTPow2Size); | 146 ASSERT(log2FFTSize <= kMaxFFTPow2Size); |
| 147 int bufSize; | 147 int bufSize; |
| 148 OMXResult status = omxSP_FFTGetBufSize_R_F32(log2FFTSize, &bufSize); | 148 OMXResult status = omxSP_FFTGetBufSize_R_F32(log2FFTSize, &bufSize); |
| 149 | 149 |
| 150 if (status == OMX_Sts_NoErr) { | 150 if (status == OMX_Sts_NoErr) { |
| 151 OMXFFTSpec_R_F32* context = static_cast<OMXFFTSpec_R_F32*>(malloc(bufSize)); | 151 OMXFFTSpec_R_F32* context = static_cast<OMXFFTSpec_R_F32*>(malloc(bufSize)); |
| 152 omxSP_FFTInit_R_F32(context, log2FFTSize); | 152 omxSP_FFTInit_R_F32(context, log2FFTSize); |
| 153 return context; | 153 return context; |
| 154 } | 154 } |
| 155 | 155 |
| 156 return nullptr; | 156 return nullptr; |
| 157 } | 157 } |
| 158 | 158 |
| 159 } // namespace blink | 159 } // namespace blink |
| 160 | 160 |
| 161 #endif // #if OS(ANDROID) && !USE(WEBAUDIO_OPENMAX_DL_FFT) | 161 #endif // #if OS(ANDROID) && !USE(WEBAUDIO_OPENMAX_DL_FFT) |
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