| 11 | #include "DsCNNPreprocessor.hpp" |
| 12 | |
| 13 | std::vector<int8_t> kws::DsCNNPreprocessor::Invoke(const float* audioData, size_t dataSize, |
| 14 | int quantOffset, float quantScale) |
| 15 | { |
| 16 | auto window = SlidingWindow<const float>( |
| 17 | audioData, dataSize, |
| 18 | this->m_windowLen, this->m_windowStride); |
| 19 | |
| 20 | uint32_t mfccBufIdx = 0; |
| 21 | std::vector<int8_t> outputBuffer; |
| 22 | // While we can slide over the window |
| 23 | while (window.HasNext()) |
| 24 | { |
| 25 | const float* mfccWindow = window.Next(); |
| 26 | auto mfccAudioData = std::vector<float>(mfccWindow, mfccWindow + this->m_windowLen); |
| 27 | |
| 28 | auto mfcc = this->m_mfcc->MfccComputeQuant<int8_t>(mfccAudioData, quantScale, quantOffset); |
| 29 | |
| 30 | std::copy(mfcc.begin(), mfcc.end(), std::back_inserter(outputBuffer)); |
| 31 | |
| 32 | ++mfccBufIdx; |
| 33 | } |
| 34 | |
| 35 | return outputBuffer; |
| 36 | } |
| 37 | |
| 38 | kws::DsCNNPreprocessor::DsCNNPreprocessor(const uint32_t windowLen, const uint32_t windowStride, |
| 39 | std::unique_ptr<DsCnnMFCC> mfccInst) : |