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Diffstat (limited to 'third_party/libwebrtc/modules/audio_processing/test/fake_recording_device.h')
-rw-r--r-- | third_party/libwebrtc/modules/audio_processing/test/fake_recording_device.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/third_party/libwebrtc/modules/audio_processing/test/fake_recording_device.h b/third_party/libwebrtc/modules/audio_processing/test/fake_recording_device.h new file mode 100644 index 0000000000..da3c0cf794 --- /dev/null +++ b/third_party/libwebrtc/modules/audio_processing/test/fake_recording_device.h @@ -0,0 +1,74 @@ +/* + * 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(int level); + void SetUndoMicLevel(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_ |