1 /* 2 * Copyright (C) 2017 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 #ifndef LB2_LOOPBACK_TEST_H_ 18 #define LB2_LOOPBACK_TEST_H_ 19 20 #include <atomic> 21 #include <memory> 22 23 #include <audio_utils/fifo.h> 24 25 #include "lb2/audio_buffer.h" 26 #include "lb2/sound_system.h" 27 #include "lb2/test_context.h" 28 29 // Generic test interface. The test is driven by the write callback 30 // of the sound system and periodic polling via 'collectRecording' 31 // method. 32 class LoopbackTest { 33 public: 34 LoopbackTest(SoundSystem* soundSys, TestContext* testCtx); 35 LoopbackTest(const LoopbackTest&) = delete; 36 LoopbackTest& operator=(const LoopbackTest&) = delete; 37 virtual ~LoopbackTest(); 38 39 virtual bool init(); 40 virtual int collectRecording(AudioBufferView<double> buffer); 41 42 protected: 43 // This method is called on the sound system callback thread. 44 void receiveRecording(size_t framesRead); 45 46 SoundSystem* mSoundSys; 47 AudioBuffer<sample_t> mReadBuffer; 48 49 private: 50 static constexpr size_t RECORDING_FIFO_FRAMES = 65536; 51 static constexpr size_t COLLECTION_LOOPS = 10; 52 static constexpr size_t COLLECTION_PERIOD_MS = 100; 53 54 TestContext* mTestCtx; 55 std::unique_ptr<sample_t[]> mRecordingFifoData; 56 struct audio_utils_fifo mRecordingFifo; 57 }; 58 59 60 // Latency test implementation. Using the parameters from the test 61 // context, first it drains the audio system read queue, then injects 62 // provided impulse, and then copies read audio input to output. 63 class LatencyTest : public LoopbackTest { 64 public: 65 LatencyTest(SoundSystem* soundSys, LatencyTestContext* testCtx); 66 LatencyTest(const LatencyTest&) = delete; 67 LatencyTest& operator=(const LatencyTest&) = delete; 68 virtual ~LatencyTest(); 69 70 bool init() override; 71 72 private: 73 static constexpr size_t INITIAL_SILENCE_MS = 240; // Approx. as in the legacy version. 74 75 AudioBufferView<sample_t> writeCallback(size_t expectedFrames); 76 77 //LatencyTestContext* mTestCtx; 78 int mDrainInput; 79 int mInputFramesToDiscard; 80 int mInitialSilenceFrameCount; 81 int mInjectImpulseNextFramePos; 82 AudioBufferView<sample_t> mImpulse; 83 }; 84 85 86 // Glitch test implementation. Writes the test signal to output, 87 // and reads back input. 88 class GlitchTest : public LoopbackTest { 89 public: 90 GlitchTest(SoundSystem* soundSys, GlitchTestContext* testCtx); 91 GlitchTest(const GlitchTest&) = delete; 92 GlitchTest& operator=(const GlitchTest&) = delete; 93 virtual ~GlitchTest(); 94 95 bool init() override; 96 97 private: 98 AudioBufferView<sample_t> writeCallback(size_t expectedFrames); 99 100 GlitchTestContext* mTestCtx; 101 }; 102 103 #endif // LB2_LOOPBACK_TEST_H_ 104