1*05767d91SRobert Wu /* 2*05767d91SRobert Wu * Copyright 2021 The Android Open Source Project 3*05767d91SRobert Wu * 4*05767d91SRobert Wu * Licensed under the Apache License, Version 2.0 (the "License"); 5*05767d91SRobert Wu * you may not use this file except in compliance with the License. 6*05767d91SRobert Wu * You may obtain a copy of the License at 7*05767d91SRobert Wu * 8*05767d91SRobert Wu * http://www.apache.org/licenses/LICENSE-2.0 9*05767d91SRobert Wu * 10*05767d91SRobert Wu * Unless required by applicable law or agreed to in writing, software 11*05767d91SRobert Wu * distributed under the License is distributed on an "AS IS" BASIS, 12*05767d91SRobert Wu * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13*05767d91SRobert Wu * See the License for the specific language governing permissions and 14*05767d91SRobert Wu * limitations under the License. 15*05767d91SRobert Wu */ 16*05767d91SRobert Wu 17*05767d91SRobert Wu #ifndef FLOWGRAPH_MONO_BLEND_H 18*05767d91SRobert Wu #define FLOWGRAPH_MONO_BLEND_H 19*05767d91SRobert Wu 20*05767d91SRobert Wu #include <sys/types.h> 21*05767d91SRobert Wu #include <unistd.h> 22*05767d91SRobert Wu 23*05767d91SRobert Wu #include "FlowGraphNode.h" 24*05767d91SRobert Wu 25*05767d91SRobert Wu namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph { 26*05767d91SRobert Wu 27*05767d91SRobert Wu /** 28*05767d91SRobert Wu * Combine data between multiple channels so each channel is an average 29*05767d91SRobert Wu * of all channels. 30*05767d91SRobert Wu */ 31*05767d91SRobert Wu class MonoBlend : public FlowGraphFilter { 32*05767d91SRobert Wu public: 33*05767d91SRobert Wu explicit MonoBlend(int32_t channelCount); 34*05767d91SRobert Wu 35*05767d91SRobert Wu virtual ~MonoBlend() = default; 36*05767d91SRobert Wu 37*05767d91SRobert Wu int32_t onProcess(int32_t numFrames) override; 38*05767d91SRobert Wu getName()39*05767d91SRobert Wu const char *getName() override { 40*05767d91SRobert Wu return "MonoBlend"; 41*05767d91SRobert Wu } 42*05767d91SRobert Wu private: 43*05767d91SRobert Wu const float mInvChannelCount; 44*05767d91SRobert Wu }; 45*05767d91SRobert Wu 46*05767d91SRobert Wu } /* namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph */ 47*05767d91SRobert Wu 48*05767d91SRobert Wu #endif //FLOWGRAPH_MONO_BLEND 49