| /* |
| * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #ifndef MODULES_AUDIO_PROCESSING_TEST_FAKE_RECORDING_DEVICE_H_ |
| #define MODULES_AUDIO_PROCESSING_TEST_FAKE_RECORDING_DEVICE_H_ |
| |
| #include <algorithm> |
| #include <memory> |
| #include <vector> |
| |
| #include "api/array_view.h" |
| #include "common_audio/channel_buffer.h" |
| #include "rtc_base/checks.h" |
| |
| namespace webrtc { |
| namespace test { |
| |
| class FakeRecordingDeviceWorker; |
| |
| // Class for simulating a microphone with analog gain. |
| // |
| // The intended modes of operation are the following: |
| // |
| // FakeRecordingDevice fake_mic(255, 1); |
| // |
| // fake_mic.SetMicLevel(170); |
| // fake_mic.SimulateAnalogGain(buffer); |
| // |
| // When the mic level to undo is known: |
| // |
| // fake_mic.SetMicLevel(170); |
| // fake_mic.SetUndoMicLevel(30); |
| // fake_mic.SimulateAnalogGain(buffer); |
| // |
| // The second option virtually restores the unmodified microphone level. Calling |
| // SimulateAnalogGain() will first "undo" the gain applied by the real |
| // microphone (e.g., 30). |
| class FakeRecordingDevice final { |
| public: |
| FakeRecordingDevice(int initial_mic_level, int device_kind); |
| ~FakeRecordingDevice(); |
| |
| int MicLevel() const; |
| void SetMicLevel(const int level); |
| void SetUndoMicLevel(const int level); |
| |
| // Simulates the analog gain. |
| // If |real_device_level| is a valid level, the unmodified mic signal is |
| // virtually restored. To skip the latter step set |real_device_level| to |
| // an empty value. |
| void SimulateAnalogGain(rtc::ArrayView<int16_t> buffer); |
| |
| // Simulates the analog gain. |
| // If |real_device_level| is a valid level, the unmodified mic signal is |
| // virtually restored. To skip the latter step set |real_device_level| to |
| // an empty value. |
| void SimulateAnalogGain(ChannelBuffer<float>* buffer); |
| |
| private: |
| // Fake recording device worker. |
| std::unique_ptr<FakeRecordingDeviceWorker> worker_; |
| }; |
| |
| } // namespace test |
| } // namespace webrtc |
| |
| #endif // MODULES_AUDIO_PROCESSING_TEST_FAKE_RECORDING_DEVICE_H_ |