| // |
| // Copyright © 2020 Arm Ltd and Contributors. All rights reserved. |
| // SPDX-License-Identifier: MIT |
| // |
| |
| #include <catch.hpp> |
| #include <limits> |
| |
| #include "DataStructures.hpp" |
| #include "Wav2LetterPreprocessor.hpp" |
| |
| void PopulateTestWavVector(std::vector<int16_t>& vec) |
| { |
| constexpr int int16max = std::numeric_limits<int16_t>::max(); |
| int val = 0; |
| for (size_t i = 0; i < vec.size(); ++i, ++val) |
| { |
| |
| /* We want a differential filter response from both - order 1 |
| * and 2 => Don't have a linear signal here - we use a signal |
| * using squares for example. Alternate sign flips might work |
| * just as well and will be computationally less work! */ |
| int valsq = val * val; |
| if (valsq > int16max) |
| { |
| val = 0; |
| valsq = 0; |
| } |
| vec[i] = valsq; |
| } |
| } |
| |
| TEST_CASE("Preprocessing calculation INT8") |
| { |
| /*Test Constants: */ |
| const uint32_t windowLen = 512; |
| const uint32_t windowStride = 160; |
| const float quantScale = 0.1410219967365265; |
| const int quantOffset = -11; |
| int numMfccVectors = 10; |
| const int sampFreq = 16000; |
| const int frameLenMs = 32; |
| const int frameLenSamples = sampFreq * frameLenMs * 0.001; |
| const int numMfccFeats = 13; |
| const int audioDataToPreProcess = 512 + ((numMfccVectors -1) * windowStride); |
| int outputBufferSize = numMfccVectors * numMfccFeats * 3; |
| |
| /* Test wav memory */ |
| std::vector <int16_t> testWav1((windowStride * numMfccVectors) + |
| (windowLen - windowStride)); |
| /* Populate with dummy input */ |
| PopulateTestWavVector(testWav1); |
| |
| MfccParams mfccParams(sampFreq, 128, 0, 8000, numMfccFeats, |
| frameLenSamples, false, numMfccVectors); |
| |
| std::unique_ptr<Wav2LetterMFCC> mfccInst = std::make_unique<Wav2LetterMFCC>(mfccParams); |
| |
| std::vector<float> fullAudioData; |
| |
| for(int i = 0; i < 4; ++i) |
| { |
| for (auto f : testWav1) |
| { |
| fullAudioData.emplace_back(static_cast<float>(f) / (1<<15)); |
| } |
| } |
| |
| Wav2LetterPreprocessor prep(frameLenSamples, windowStride, std::move(mfccInst)); |
| |
| std::vector<int8_t> outputBuffer(outputBufferSize); |
| |
| prep.Invoke(fullAudioData.data(), audioDataToPreProcess, outputBuffer, quantOffset, quantScale); |
| |
| int8_t expectedResult[numMfccVectors][numMfccFeats*3] = |
| { |
| /* Feature vec 0 */ |
| -32, 4, -9, -8, -10, -10, -11, -11, -11, -11, -12, -11, -11, /* MFCCs */ |
| -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, /* Delta 1 */ |
| -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, /* Delta 2 */ |
| |
| /* Feature vec 1 */ |
| -31, 4, -9, -8, -10, -10, -11, -11, -11, -11, -12, -11, -11, |
| -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, |
| -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, |
| |
| /* Feature vec 2 */ |
| -31, 4, -9, -9, -10, -10, -11, -11, -11, -11, -12, -12, -12, |
| -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, |
| -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, |
| |
| /* Feature vec 3 */ |
| -31, 4, -9, -9, -10, -10, -11, -11, -11, -11, -11, -12, -12, |
| -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, |
| -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, |
| |
| /* Feature vec 4 : this should have valid delta 1 and delta 2 */ |
| -31, 4, -9, -9, -10, -10, -11, -11, -11, -11, -11, -12, -12, |
| -38, -29, -9, 1, -2, -7, -8, -8, -12, -16, -14, -5, 5, |
| -68, -50, -13, 5, 0, -9, -9, -8, -13, -20, -19, -3, 15, |
| |
| /* Feature vec 5 : this should have valid delta 1 and delta 2 */ |
| -31, 4, -9, -8, -10, -10, -11, -11, -11, -11, -11, -12, -12, |
| -62, -45, -11, 5, 0, -8, -9, -8, -12, -19, -17, -3, 13, |
| -27, -22, -13, -9, -11, -12, -12, -11, -11, -13, -13, -10, -6, |
| |
| /* Feature vec 6 */ |
| -31, 4, -9, -8, -10, -10, -11, -11, -11, -11, -12, -11, -11, |
| -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, |
| -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, |
| |
| /* Feature vec 7 */ |
| -32, 4, -9, -8, -10, -10, -11, -11, -11, -12, -12, -11, -11, |
| -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, |
| -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, |
| |
| /* Feature vec 8 */ |
| -32, 4, -9, -8, -10, -10, -11, -11, -11, -12, -12, -11, -11, |
| -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, |
| -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, |
| |
| /* Feature vec 9 */ |
| -31, 4, -9, -8, -10, -10, -11, -11, -11, -11, -12, -11, -11, |
| -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, -11, |
| -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10, -10 |
| }; |
| |
| /* Check that the elements have been calculated correctly */ |
| for (uint32_t j = 0; j < numMfccVectors; ++j) |
| { |
| for (uint32_t i = 0; i < numMfccFeats * 3; ++i) |
| { |
| size_t tensorIdx = (j * numMfccFeats * 3) + i; |
| CHECK(static_cast<int16_t>(outputBuffer.at(tensorIdx) == static_cast<int16_t>(expectedResult[j][i]))); |
| } |
| } |
| } |