1 /* 2 * Copyright 2018 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 <algorithm> 18 #include <unistd.h> 19 #include "AudioProcessorBase.h" 20 #include "SourceFloat.h" 21 22 using namespace flowgraph; 23 SourceFloat(int32_t channelCount)24SourceFloat::SourceFloat(int32_t channelCount) 25 : AudioSource(channelCount) { 26 } 27 onProcess(int64_t framePosition,int32_t numFrames)28int32_t SourceFloat::onProcess(int64_t framePosition, int32_t numFrames) { 29 30 float *outputBuffer = output.getBlock(); 31 int32_t channelCount = output.getSamplesPerFrame(); 32 33 int32_t framesLeft = mSizeInFrames - mFrameIndex; 34 int32_t framesToProcess = std::min(numFrames, framesLeft); 35 int32_t numSamples = framesToProcess * channelCount; 36 37 const float *floatBase = (float *) mData; 38 const float *floatData = &floatBase[mFrameIndex * channelCount]; 39 memcpy(outputBuffer, floatData, numSamples * sizeof(float)); 40 mFrameIndex += framesToProcess; 41 return framesToProcess; 42 } 43 44