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/*
* Copyright 2018 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.
*/
#ifndef SAMPLES_FULLDUPLEXPASS_H
#define SAMPLES_FULLDUPLEXPASS_H
class FullDuplexPass : public oboe::FullDuplexStream {
public:
virtual oboe::DataCallbackResult
onBothStreamsReady(
const void *inputData,
int numInputFrames,
void *outputData,
int numOutputFrames) {
// Copy the input samples to the output with a little arbitrary gain change.
// This code assumes the data format for both streams is Float.
const float *inputFloats = static_cast<const float *>(inputData);
float *outputFloats = static_cast<float *>(outputData);
// It also assumes the channel count for each stream is the same.
int32_t samplesPerFrame = getOutputStream()->getChannelCount();
int32_t numInputSamples = numInputFrames * samplesPerFrame;
int32_t numOutputSamples = numOutputFrames * samplesPerFrame;
// It is possible that there may be fewer input than output samples.
int32_t samplesToProcess = std::min(numInputSamples, numOutputSamples);
for (int32_t i = 0; i < samplesToProcess; i++) {
*outputFloats++ = *inputFloats++ * 0.95; // do some arbitrary processing
}
// If there are fewer input samples then clear the rest of the buffer.
int32_t samplesLeft = numOutputSamples - numInputSamples;
for (int32_t i = 0; i < samplesLeft; i++) {
*outputFloats++ = 0.0; // silence
}
return oboe::DataCallbackResult::Continue;
}
};
#endif //SAMPLES_FULLDUPLEXPASS_H
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