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| 1 /* |
| 2 * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license |
| 5 * that can be found in the LICENSE file in the root of the source |
| 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ |
| 10 |
| 11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_TEST_FAKE_RECORDING_DEVICE_H_ |
| 12 #define WEBRTC_MODULES_AUDIO_PROCESSING_TEST_FAKE_RECORDING_DEVICE_H_ |
| 13 |
| 14 #include <algorithm> |
| 15 #include <memory> |
| 16 #include <vector> |
| 17 |
| 18 #include "webrtc/common_audio/channel_buffer.h" |
| 19 #include "webrtc/modules/include/module_common_types.h" |
| 20 #include "webrtc/rtc_base/array_view.h" |
| 21 #include "webrtc/rtc_base/checks.h" |
| 22 #include "webrtc/rtc_base/optional.h" |
| 23 |
| 24 namespace webrtc { |
| 25 namespace test { |
| 26 |
| 27 class FakeRecordingDeviceWorker; |
| 28 |
| 29 // Class for simulating a microphone with analog gain. |
| 30 // |
| 31 // The intended modes of operation are the following: |
| 32 // |
| 33 // FakeRecordingDevice fake_mic(255, 1); |
| 34 // |
| 35 // fake_mic.SetMicLevel(170); |
| 36 // fake_mic.SetUndoMicLevel(rtc::Optional<int>()); |
| 37 // fake_mic.SimulateAnalogGain(buffer); |
| 38 // |
| 39 // When the mic level to undo is known: |
| 40 // |
| 41 // fake_mic.SetMicLevel(170); |
| 42 // fake_mic.SetUndoMicLevel(rtc::Optional<int>(30)); |
| 43 // fake_mic.SimulateAnalogGain(buffer); |
| 44 // |
| 45 // The second option virtually restores the unmodified microphone level. Calling |
| 46 // SimulateAnalogGain() will first "undo" the gain applied by the real |
| 47 // microphone (e.g., 30). |
| 48 class FakeRecordingDevice final { |
| 49 public: |
| 50 FakeRecordingDevice(int initial_mic_level, int device_kind); |
| 51 ~FakeRecordingDevice(); |
| 52 |
| 53 int MicLevel() const; |
| 54 void SetMicLevel(const int level); |
| 55 void SetUndoMicLevel(const rtc::Optional<int> level); |
| 56 |
| 57 // Simulates the analog gain. |
| 58 // If |real_device_level| is a valid level, the unmodified mic signal is |
| 59 // virtually restored. To skip the latter step set |real_device_level| to |
| 60 // an empty value. |
| 61 void SimulateAnalogGain(AudioFrame* buffer); |
| 62 |
| 63 // Simulates the analog gain. |
| 64 // If |real_device_level| is a valid level, the unmodified mic signal is |
| 65 // virtually restored. To skip the latter step set |real_device_level| to |
| 66 // an empty value. |
| 67 void SimulateAnalogGain(ChannelBuffer<float>* buffer); |
| 68 |
| 69 private: |
| 70 // Fake recording device worker. |
| 71 std::unique_ptr<FakeRecordingDeviceWorker> worker_; |
| 72 }; |
| 73 |
| 74 } // namespace test |
| 75 } // namespace webrtc |
| 76 |
| 77 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_TEST_FAKE_RECORDING_DEVICE_H_ |
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