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Diffstat (limited to 'source/application/api/use_case/noise_reduction/include/RNNoiseModel.hpp')
-rw-r--r-- | source/application/api/use_case/noise_reduction/include/RNNoiseModel.hpp | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/source/application/api/use_case/noise_reduction/include/RNNoiseModel.hpp b/source/application/api/use_case/noise_reduction/include/RNNoiseModel.hpp new file mode 100644 index 0000000..3d2f23c --- /dev/null +++ b/source/application/api/use_case/noise_reduction/include/RNNoiseModel.hpp @@ -0,0 +1,78 @@ +/* + * 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. + */ +#ifndef RNNOISE_MODEL_HPP +#define RNNOISE_MODEL_HPP + +#include "Model.hpp" + +extern const uint32_t g_NumInputFeatures; +extern const uint32_t g_FrameLength; +extern const uint32_t g_FrameStride; + +namespace arm { +namespace app { + + class RNNoiseModel : public Model { + public: + /** + * @brief Runs inference for RNNoise model. + * + * Call CopyGruStates so GRU state outputs are copied to GRU state inputs before the inference run. + * Run ResetGruState() method to set states to zero before starting processing logically related data. + * @return True if inference succeeded, False - otherwise + */ + bool RunInference() override; + + /** + * @brief Sets GRU input states to zeros. + * Call this method before starting processing the new sequence of logically related data. + */ + void ResetGruState(); + + /** + * @brief Copy current GRU output states to input states. + * Call this method before starting processing the next sequence of logically related data. + */ + bool CopyGruStates(); + + /* Which index of model outputs does the main output (gains) come from. */ + const size_t m_indexForModelOutput = 1; + + protected: + /** @brief Gets the reference to op resolver interface class. */ + const tflite::MicroOpResolver& GetOpResolver() override; + + /** @brief Adds operations to the op resolver instance. */ + bool EnlistOperations() override; + + /* + Each inference after the first needs to copy 3 GRU states from a output index to input index (model dependent): + 0 -> 3, 2 -> 2, 3 -> 1 + */ + const std::vector<std::pair<size_t, size_t>> m_gruStateMap = {{0,3}, {2, 2}, {3, 1}}; + private: + /* Maximum number of individual operations that can be enlisted. */ + static constexpr int ms_maxOpCnt = 15; + + /* A mutable op resolver instance. */ + tflite::MicroMutableOpResolver<ms_maxOpCnt> m_opResolver; + }; + +} /* namespace app */ +} /* namespace arm */ + +#endif /* RNNOISE_MODEL_HPP */ |