1 /* 2 * Copyright 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef FLOWGRAPH_CHANNEL_COUNT_CONVERTER_H 18 #define FLOWGRAPH_CHANNEL_COUNT_CONVERTER_H 19 20 #include <unistd.h> 21 #include <sys/types.h> 22 23 #include "FlowGraphNode.h" 24 25 namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph { 26 27 /** 28 * Change the number of number of channels without mixing. 29 * When increasing the channel count, duplicate input channels. 30 * When decreasing the channel count, drop input channels. 31 */ 32 class ChannelCountConverter : public FlowGraphNode { 33 public: 34 explicit ChannelCountConverter( 35 int32_t inputChannelCount, 36 int32_t outputChannelCount); 37 38 virtual ~ChannelCountConverter(); 39 40 int32_t onProcess(int32_t numFrames) override; 41 getName()42 const char *getName() override { 43 return "ChannelCountConverter"; 44 } 45 46 FlowGraphPortFloatInput input; 47 FlowGraphPortFloatOutput output; 48 }; 49 50 } /* namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph */ 51 52 #endif //FLOWGRAPH_CHANNEL_COUNT_CONVERTER_H 53