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 20 #include "FlowGraphNode.h" 21 #include "SourceI16.h" 22 23 #if FLOWGRAPH_ANDROID_INTERNAL 24 #include <audio_utils/primitives.h> 25 #endif 26 27 using namespace FLOWGRAPH_OUTER_NAMESPACE::flowgraph; 28 SourceI16(int32_t channelCount)29SourceI16::SourceI16(int32_t channelCount) 30 : FlowGraphSourceBuffered(channelCount) { 31 } 32 onProcess(int32_t numFrames)33int32_t SourceI16::onProcess(int32_t numFrames) { 34 float *floatData = output.getBuffer(); 35 int32_t channelCount = output.getSamplesPerFrame(); 36 37 int32_t framesLeft = mSizeInFrames - mFrameIndex; 38 int32_t framesToProcess = std::min(numFrames, framesLeft); 39 int32_t numSamples = framesToProcess * channelCount; 40 41 const int16_t *shortBase = static_cast<const int16_t *>(mData); 42 const int16_t *shortData = &shortBase[mFrameIndex * channelCount]; 43 44 #if FLOWGRAPH_ANDROID_INTERNAL 45 memcpy_to_float_from_i16(floatData, shortData, numSamples); 46 #else 47 for (int i = 0; i < numSamples; i++) { 48 *floatData++ = *shortData++ * (1.0f / 32768); 49 } 50 #endif 51 52 mFrameIndex += framesToProcess; 53 return framesToProcess; 54 }