1*05767d91SRobert Wu /* 2*05767d91SRobert Wu * Copyright 2015 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_CHANNEL_COUNT_CONVERTER_H 18*05767d91SRobert Wu #define FLOWGRAPH_CHANNEL_COUNT_CONVERTER_H 19*05767d91SRobert Wu 20*05767d91SRobert Wu #include <unistd.h> 21*05767d91SRobert Wu #include <sys/types.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 * Change the number of number of channels without mixing. 29*05767d91SRobert Wu * When increasing the channel count, duplicate input channels. 30*05767d91SRobert Wu * When decreasing the channel count, drop input channels. 31*05767d91SRobert Wu */ 32*05767d91SRobert Wu class ChannelCountConverter : public FlowGraphNode { 33*05767d91SRobert Wu public: 34*05767d91SRobert Wu explicit ChannelCountConverter( 35*05767d91SRobert Wu int32_t inputChannelCount, 36*05767d91SRobert Wu int32_t outputChannelCount); 37*05767d91SRobert Wu 38*05767d91SRobert Wu virtual ~ChannelCountConverter(); 39*05767d91SRobert Wu 40*05767d91SRobert Wu int32_t onProcess(int32_t numFrames) override; 41*05767d91SRobert Wu getName()42*05767d91SRobert Wu const char *getName() override { 43*05767d91SRobert Wu return "ChannelCountConverter"; 44*05767d91SRobert Wu } 45*05767d91SRobert Wu 46*05767d91SRobert Wu FlowGraphPortFloatInput input; 47*05767d91SRobert Wu FlowGraphPortFloatOutput output; 48*05767d91SRobert Wu }; 49*05767d91SRobert Wu 50*05767d91SRobert Wu } /* namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph */ 51*05767d91SRobert Wu 52*05767d91SRobert Wu #endif //FLOWGRAPH_CHANNEL_COUNT_CONVERTER_H 53