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 #include <unistd.h> 18 #include "FlowGraphNode.h" 19 #include "MonoToMultiConverter.h" 20 21 using namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph; 22 MonoToMultiConverter(int32_t outputChannelCount)23MonoToMultiConverter::MonoToMultiConverter(int32_t outputChannelCount) 24 : input(*this, 1) 25 , output(*this, outputChannelCount) { 26 } 27 onProcess(int32_t numFrames)28int32_t MonoToMultiConverter::onProcess(int32_t numFrames) { 29 const float *inputBuffer = input.getBuffer(); 30 float *outputBuffer = output.getBuffer(); 31 int32_t channelCount = output.getSamplesPerFrame(); 32 for (int i = 0; i < numFrames; i++) { 33 // read one, write many 34 float sample = *inputBuffer++; 35 for (int channel = 0; channel < channelCount; channel++) { 36 *outputBuffer++ = sample; 37 } 38 } 39 return numFrames; 40 } 41 42