1 /*
2  * Copyright 2023 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 MMC_METRICS_MMC_RTT_LOGGER_H_
18 #define MMC_METRICS_MMC_RTT_LOGGER_H_
19 
20 #include <cstdint>
21 #include <string>
22 
23 namespace mmc {
24 
25 // MmcRttLogger computes and uploads below rtt stats:
26 //   Maximum rtt, mean rtt, num requests, codec type.
27 class MmcRttLogger {
28  public:
29   explicit MmcRttLogger(int codec_type);
30   ~MmcRttLogger();
31 
32   // MmcRttLogger is neither copyable nor movable.
33   MmcRttLogger(const MmcRttLogger&) = delete;
34   MmcRttLogger& operator=(const MmcRttLogger&) = delete;
35 
36   // Records elapsed_time (in microseconds).
37   // Elapsed time should be positive, otherwise it won't be recorded.
38   void RecordRtt(int64_t elapsed_time);
39 
40   // Computes transcode rtt statics, uploads record via bluetooth metrics api,
41   // and clears the record. Empty record will be ignored.
42   void UploadTranscodeRttStatics();
43 
44  private:
45   int codec_type_;
46   int64_t num_requests_;
47   double rtt_sum_;  // for computing mean rtt
48   int64_t maximum_rtt_;
49 };
50 
51 }  // namespace mmc
52 
53 #endif  // MMC_METRICS_MMC_RTT_LOGGER_H_
54