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/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "common/OboeDebug.h"
#include "FullDuplexAnalyzer.h"
oboe::Result FullDuplexAnalyzer::start() {
getLoopbackProcessor()->setSampleRate(getOutputStream()->getSampleRate());
getLoopbackProcessor()->prepareToTest();
mWriteReadDeltaValid = false;
return FullDuplexStream::start();
}
oboe::DataCallbackResult FullDuplexAnalyzer::onBothStreamsReady(
const float *inputData,
int numInputFrames,
float *outputData,
int numOutputFrames) {
int32_t inputStride = getInputStream()->getChannelCount();
int32_t outputStride = getOutputStream()->getChannelCount();
const float *inputFloat = inputData;
float *outputFloat = outputData;
// Get atomic snapshot of the relative frame positions so they
// can be used to calculate timestamp latency.
int64_t framesRead = getInputStream()->getFramesRead();
int64_t framesWritten = getOutputStream()->getFramesWritten();
mWriteReadDelta = framesWritten - framesRead;
mWriteReadDeltaValid = true;
(void) getLoopbackProcessor()->process(inputFloat, inputStride, numInputFrames,
outputFloat, outputStride, numOutputFrames);
// write the first channel of output and input to the stereo recorder
if (mRecording != nullptr) {
float buffer[2];
int numBoth = std::min(numInputFrames, numOutputFrames);
for (int i = 0; i < numBoth; i++) {
buffer[0] = *outputFloat;
outputFloat += outputStride;
buffer[1] = *inputFloat;
inputFloat += inputStride;
mRecording->write(buffer, 1);
}
// Handle mismatch in in numFrames.
buffer[0] = 0.0f; // gap in output
for (int i = numBoth; i < numInputFrames; i++) {
buffer[1] = *inputFloat;
inputFloat += inputStride;
mRecording->write(buffer, 1);
}
buffer[1] = 0.0f; // gap in input
for (int i = numBoth; i < numOutputFrames; i++) {
buffer[0] = *outputFloat;
outputFloat += outputStride;
mRecording->write(buffer, 1);
}
}
return oboe::DataCallbackResult::Continue;
};
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