| /* |
| * 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" |
| |
| namespace arm { |
| namespace app { |
| namespace rnn { |
| extern const uint32_t g_NumInputFeatures; |
| extern const uint32_t g_FrameLength; |
| extern const uint32_t g_FrameStride; |
| } /* namespace rnn */ |
| |
| 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 */ |