1 /* 2 * Copyright (c) 2025 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef AUDIO_LIMITER_H 17 #define AUDIO_LIMITER_H 18 19 #include <cstdio> 20 #include <cstdint> 21 #include <string> 22 namespace OHOS { 23 namespace AudioStandard { 24 25 class AudioLimiter { 26 public: 27 AudioLimiter(int32_t sinkIndex); 28 ~AudioLimiter(); 29 int32_t SetConfig(int32_t maxRequest, int32_t biteSize, int32_t sampleRate, int32_t channels); 30 int32_t Process(int32_t frameLen, float *inBuffer, float *outBuffer); 31 uint32_t GetLatency(); 32 private: 33 void ProcessAlgo(int algoFrameLen, float *inBuffer, float *outBuffer); 34 void ReleaseBuffer(); 35 uint32_t latency_; 36 int32_t sinkIndex_; 37 int32_t algoFrameLen_; 38 int32_t format_; 39 float nextLev_; 40 float curMaxLev_; 41 float threshold_; 42 float gain_; 43 float levelAttack_; 44 float levelRelease_; 45 float gainAttack_; 46 float gainRelease_; 47 float *bufHis_; 48 uint32_t sampleRate_; 49 uint32_t channels_; 50 FILE *dumpFileInput_ = nullptr; 51 FILE *dumpFileOutput_ = nullptr; 52 std::string dumpFileNameIn_ = ""; 53 std::string dumpFileNameOut_ = ""; 54 }; 55 56 } // namespace AudioStandard 57 } // namespace OHOS 58 #endif // AUDIO_LIMITER_H