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54 lines
2.1 KiB
C++
54 lines
2.1 KiB
C++
/*
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* Copyright 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SAMPLES_FULLDUPLEXPASS_H
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#define SAMPLES_FULLDUPLEXPASS_H
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class FullDuplexPass : public oboe::FullDuplexStream {
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public:
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virtual oboe::DataCallbackResult
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onBothStreamsReady(
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const void *inputData,
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int numInputFrames,
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void *outputData,
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int numOutputFrames) {
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// Copy the input samples to the output with a little arbitrary gain change.
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// This code assumes the data format for both streams is Float.
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const float *inputFloats = static_cast<const float *>(inputData);
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float *outputFloats = static_cast<float *>(outputData);
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// It also assumes the channel count for each stream is the same.
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int32_t samplesPerFrame = getOutputStream()->getChannelCount();
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int32_t numInputSamples = numInputFrames * samplesPerFrame;
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int32_t numOutputSamples = numOutputFrames * samplesPerFrame;
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// It is possible that there may be fewer input than output samples.
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int32_t samplesToProcess = std::min(numInputSamples, numOutputSamples);
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for (int32_t i = 0; i < samplesToProcess; i++) {
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*outputFloats++ = *inputFloats++ * 0.95; // do some arbitrary processing
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}
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// If there are fewer input samples then clear the rest of the buffer.
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int32_t samplesLeft = numOutputSamples - numInputSamples;
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for (int32_t i = 0; i < samplesLeft; i++) {
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*outputFloats++ = 0.0; // silence
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}
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return oboe::DataCallbackResult::Continue;
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}
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};
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#endif //SAMPLES_FULLDUPLEXPASS_H
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