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78 lines
3.1 KiB
78 lines
3.1 KiB
/*
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* Copyright 2019 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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#include "common/OboeDebug.h"
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#include "FullDuplexAnalyzer.h"
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oboe::Result FullDuplexAnalyzer::start() {
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getLoopbackProcessor()->setSampleRate(getOutputStream()->getSampleRate());
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getLoopbackProcessor()->prepareToTest();
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mWriteReadDeltaValid = false;
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return FullDuplexStreamWithConversion::start();
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}
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oboe::DataCallbackResult FullDuplexAnalyzer::onBothStreamsReadyFloat(
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const float *inputData,
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int numInputFrames,
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float *outputData,
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int numOutputFrames) {
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int32_t inputStride = getInputStream()->getChannelCount();
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int32_t outputStride = getOutputStream()->getChannelCount();
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auto *inputFloat = static_cast<const float *>(inputData);
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float *outputFloat = outputData;
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// Get atomic snapshot of the relative frame positions so they
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// can be used to calculate timestamp latency.
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int64_t framesRead = getInputStream()->getFramesRead();
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int64_t framesWritten = getOutputStream()->getFramesWritten();
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mWriteReadDelta = framesWritten - framesRead;
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mWriteReadDeltaValid = true;
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(void) getLoopbackProcessor()->process(inputFloat, inputStride, numInputFrames,
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outputFloat, outputStride, numOutputFrames);
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// Save data for later analysis or for writing to a WAVE file.
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if (mRecording != nullptr) {
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float buffer[2];
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int numBoth = std::min(numInputFrames, numOutputFrames);
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// Offset to the selected channels that we are analyzing.
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inputFloat += getLoopbackProcessor()->getInputChannel();
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outputFloat += getLoopbackProcessor()->getOutputChannel();
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for (int i = 0; i < numBoth; i++) {
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buffer[0] = *outputFloat;
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outputFloat += outputStride;
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buffer[1] = *inputFloat;
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inputFloat += inputStride;
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mRecording->write(buffer, 1);
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}
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// Handle mismatch in numFrames.
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const float gapMarker = -0.9f; // Recognizable value so we can tell underruns from DSP gaps.
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buffer[0] = gapMarker; // gap in output
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for (int i = numBoth; i < numInputFrames; i++) {
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buffer[1] = *inputFloat;
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inputFloat += inputStride;
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mRecording->write(buffer, 1);
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}
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buffer[1] = gapMarker; // gap in input
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for (int i = numBoth; i < numOutputFrames; i++) {
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buffer[0] = *outputFloat;
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outputFloat += outputStride;
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mRecording->write(buffer, 1);
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}
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}
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return oboe::DataCallbackResult::Continue;
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};
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