1 files changed, 170 insertions, 0 deletions
diff --git a/tests/use_case/asr/MfccTests.cc b/tests/use_case/asr/MfccTests.cc
new file mode 100644
index 0000000..c70e53e
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+++ b/tests/use_case/asr/MfccTests.cc
@@ -0,0 +1,170 @@
+/*
+ * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#include "Wav2LetterMfcc.hpp"
+
+#include <algorithm>
+#include <catch.hpp>
+#include <limits>
+
+/* First 512 samples from itellyou.wav. */
+const std::vector<int16_t> testWav1 = std::vector<int16_t> {
+    -3,0,1,-1,2,3,-2,2,
+    1,-2,0,3,-1,8,3,2,
+    -1,-1,2,7,3,5,6,6,
+    6,12,5,6,3,3,5,4,
+    4,6,7,7,7,3,7,2,
+    8,4,4,2,-4,-1,-1,-4,
+    2,1,-1,-4,0,-7,-6,-2,
+    -5,1,-5,-1,-7,-3,-3,-7,
+    0,-3,3,-5,0,1,-2,-2,
+    -3,-3,-7,-3,-2,-6,-5,-8,
+    -2,-8,4,-9,-4,-9,-5,-5,
+    -3,-9,-3,-9,-1,-7,-4,1,
+    -3,2,-8,-4,-4,-5,1,-3,
+    -1,0,-1,-2,-3,-2,-4,-1,
+    1,-1,3,0,3,2,0,0,
+    0,-3,1,1,0,8,3,4,
+    1,5,6,4,7,3,3,0,
+    3,6,7,6,4,5,9,9,
+    5,5,8,1,6,9,6,6,
+    7,1,8,1,5,0,5,5,
+    0,3,2,7,2,-3,3,0,
+    3,0,0,0,2,0,-1,-1,
+    -2,-3,-8,0,1,0,-3,-3,
+    -3,-2,-3,-3,-4,-6,-2,-8,
+    -9,-4,-1,-5,-3,-3,-4,-3,
+    -6,3,0,-1,-2,-9,-4,-2,
+    2,-1,3,-5,-5,-2,0,-2,
+    0,-1,-3,1,-2,9,4,5,
+    2,2,1,0,-6,-2,0,0,
+    0,-1,4,-4,3,-7,-1,5,
+    -6,-1,-5,4,3,9,-2,1,
+    3,0,0,-2,1,2,1,1,
+    0,3,2,-1,3,-3,7,0,
+    0,3,2,2,-2,3,-2,2,
+    -3,4,-1,-1,-5,-1,-3,-2,
+    1,-1,3,2,4,1,2,-2,
+    0,2,7,0,8,-3,6,-3,
+    6,1,2,-3,-1,-1,-1,1,
+    -2,2,1,2,0,-2,3,-2,
+    3,-2,1,0,-3,-1,-2,-4,
+    -6,-5,-8,-1,-4,0,-3,-1,
+    -1,-1,0,-2,-3,-7,-1,0,
+    1,5,0,5,1,1,-3,0,
+    -6,3,-8,4,-8,6,-6,1,
+    -6,-2,-5,-6,0,-5,4,-1,
+    4,-2,1,2,1,0,-2,0,
+    0,2,-2,2,-5,2,0,-2,
+    1,-2,0,5,1,0,1,5,
+    0,8,3,2,2,0,5,-2,
+    3,1,0,1,0,-2,-1,-3,
+    1,-1,3,0,3,0,-2,-1,
+    -4,-4,-4,-1,-4,-4,-3,-6,
+    -3,-7,-3,-1,-2,0,-5,-4,
+    -7,-3,-2,-2,1,2,2,8,
+    5,4,2,4,3,5,0,3,
+    3,6,4,2,2,-2,4,-2,
+    3,3,2,1,1,4,-5,2,
+    -3,0,-1,1,-2,2,5,1,
+    4,2,3,1,-1,1,0,6,
+    0,-2,-1,1,-1,2,-5,-1,
+    -5,-1,-6,-3,-3,2,4,0,
+    -1,-5,3,-4,-1,-3,-4,1,
+    -4,1,-1,-1,0,-5,-4,-2,
+    -1,-1,-3,-7,-3,-3,4,4,
+};
+
+const std::vector<int16_t> testWav2 = std::vector<int16_t> (512, 0);
+
+/* Golden mfcc output for testwav1. */
+const std::vector<float> golden_mfcc_output_testWav1 {
+    -835.24603, 21.010452, 18.699404, 7.4338417, 19.028961, -5.401735, 6.4761047, -11.400679,
+    8.392709, 12.202361, 8.403276, -13.508412, -18.307348
+};
+
+/* Golden mfcc output for the all zero wav. */
+const std::vector<float> golden_mfcc_output_testWav2 {
+    -1131.37085, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+
+arm::app::audio::Wav2LetterMFCC GetMFCCInstance()
+{
+    const auto sampFreq = arm::app::audio::Wav2LetterMFCC::ms_defaultSamplingFreq;
+    const auto frameLenMs = 32;
+    const auto numMfccFeats = 13;
+    const auto frameLenSamples = sampFreq * frameLenMs * 0.001;
+    return arm::app::audio::Wav2LetterMFCC(numMfccFeats, frameLenSamples);
+}
+
+template <class T>
+void TestQuantisedMFCC()
+{
+    const auto quantScale = 0.1410219967365265;
+    const auto quantOffset = 11;
+    std::vector<T> mfccOutput = GetMFCCInstance().MfccComputeQuant<T>(testWav1, quantScale, quantOffset);
+
+    long min_val = std::numeric_limits<T>::min();
+    long max_val = std::numeric_limits<T>::max();
+
+    for (size_t i = 0; i < golden_mfcc_output_testWav1.size(); i++){
+        long TestWavMfcc = (std::lround((golden_mfcc_output_testWav1[i] / quantScale) + quantOffset));
+        T quantizedTestWavMfcc = static_cast<T>(std::max(min_val, std::min(TestWavMfcc, max_val)));
+
+        REQUIRE(quantizedTestWavMfcc  == Approx(mfccOutput[i]).margin(2));
+    }
+}
+
+template void TestQuantisedMFCC<int8_t>();
+template void TestQuantisedMFCC<uint8_t>();
+template void TestQuantisedMFCC<int16_t>();
+
+TEST_CASE("MFCC calculation")
+{
+    hal_platform    platform;
+    data_acq_module dataAcq;
+    data_psn_module dataPsn;
+    platform_timer  timer;
+
+    /* Initialise the HAL and platform. */
+    hal_init(&platform, &dataAcq, &dataPsn, &timer);
+    hal_platform_init(&platform);
+
+    SECTION("FP32")
+    {
+        auto mfccOutput = GetMFCCInstance().MfccCompute(testWav1);
+        REQUIRE_THAT( mfccOutput, Catch::Approx( golden_mfcc_output_testWav1 ).margin(0.3) );
+
+        auto mfccOutput2 = GetMFCCInstance().MfccCompute(testWav2);
+        REQUIRE_THAT( mfccOutput2, Catch::Approx( golden_mfcc_output_testWav2 ).margin(0.001) );
+    }
+
+    SECTION("int8_t")
+    {
+        TestQuantisedMFCC<int8_t>();
+    }
+
+    SECTION("uint8_t")
+    {
+        TestQuantisedMFCC<uint8_t>();
+    }
+
+    SECTION("int16_t")
+    {
+        TestQuantisedMFCC<int16_t>();
+    }
+}