1 /*
2 * Copyright 2019 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 "common/OboeDebug.h"
18 #include "FullDuplexAnalyzer.h"
19
start()20 oboe::Result FullDuplexAnalyzer::start() {
21 getLoopbackProcessor()->setSampleRate(getOutputStream()->getSampleRate());
22 getLoopbackProcessor()->prepareToTest();
23 return FullDuplexStream::start();
24 }
25
onBothStreamsReady(const void * inputData,int numInputFrames,void * outputData,int numOutputFrames)26 oboe::DataCallbackResult FullDuplexAnalyzer::onBothStreamsReady(
27 const void *inputData,
28 int numInputFrames,
29 void *outputData,
30 int numOutputFrames) {
31
32 int32_t inputStride = getInputStream()->getChannelCount();
33 int32_t outputStride = getOutputStream()->getChannelCount();
34 float *inputFloat = (float *) inputData;
35 float *outputFloat = (float *) outputData;
36
37 (void) getLoopbackProcessor()->process(inputFloat, inputStride, numInputFrames,
38 outputFloat, outputStride, numOutputFrames);
39
40 // write the first channel of output and input to the stereo recorder
41 if (mRecording != nullptr) {
42 float buffer[2];
43 int numBoth = std::min(numInputFrames, numOutputFrames);
44 for (int i = 0; i < numBoth; i++) {
45 buffer[0] = *outputFloat;
46 outputFloat += outputStride;
47 buffer[1] = *inputFloat;
48 inputFloat += inputStride;
49 mRecording->write(buffer, 1);
50 }
51 // Handle mismatch in in numFrames.
52 buffer[0] = 0.0f; // gap in output
53 for (int i = numBoth; i < numInputFrames; i++) {
54 buffer[1] = *inputFloat;
55 inputFloat += inputStride;
56 mRecording->write(buffer, 1);
57 }
58 buffer[1] = 0.0f; // gap in input
59 for (int i = numBoth; i < numOutputFrames; i++) {
60 buffer[0] = *outputFloat;
61 outputFloat += outputStride;
62 mRecording->write(buffer, 1);
63 }
64 }
65 return oboe::DataCallbackResult::Continue;
66 };
67