henrik.lundin | 92a7a18 | 2017-03-07 09:58:55 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2011 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_VOICE_ENGINE_AUDIO_LEVEL_H_ |
| 12 | #define WEBRTC_VOICE_ENGINE_AUDIO_LEVEL_H_ |
| 13 | |
| 14 | #include "webrtc/base/criticalsection.h" |
| 15 | #include "webrtc/typedefs.h" |
| 16 | |
| 17 | namespace webrtc { |
| 18 | |
| 19 | class AudioFrame; |
| 20 | namespace voe { |
| 21 | |
| 22 | class AudioLevel { |
| 23 | public: |
| 24 | AudioLevel(); |
| 25 | ~AudioLevel(); |
| 26 | |
| 27 | // Called on "API thread(s)" from APIs like VoEBase::CreateChannel(), |
| 28 | // VoEBase::StopSend(), VoEVolumeControl::GetSpeechOutputLevel(). |
| 29 | int8_t Level() const; |
| 30 | int16_t LevelFullRange() const; |
| 31 | void Clear(); |
| 32 | |
| 33 | // Called on a native capture audio thread (platform dependent) from the |
| 34 | // AudioTransport::RecordedDataIsAvailable() callback. |
| 35 | // In Chrome, this method is called on the AudioInputDevice thread. |
| 36 | void ComputeLevel(const AudioFrame& audioFrame); |
| 37 | |
| 38 | private: |
| 39 | enum { kUpdateFrequency = 10 }; |
| 40 | |
| 41 | rtc::CriticalSection crit_sect_; |
| 42 | |
| 43 | int16_t abs_max_; |
| 44 | int16_t count_; |
| 45 | int8_t current_level_; |
| 46 | int16_t current_level_full_range_; |
| 47 | }; |
| 48 | |
| 49 | } // namespace voe |
| 50 | } // namespace webrtc |
| 51 | |
| 52 | #endif // WEBRTC_VOICE_ENGINE_AUDIO_LEVEL_H_ |