1/*
2 *  Copyright 2015 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#import <Foundation/Foundation.h>
12
13/** Class used to estimate bitrate based on byte count. It is expected that
14 *  byte count is monotonocially increasing. This class tracks the times that
15 *  byte count is updated, and measures the bitrate based on the byte difference
16 *  over the interval between updates.
17 */
18@interface ARDBitrateTracker : NSObject
19
20/** The bitrate in bits per second. */
21@property(nonatomic, readonly) double bitrate;
22/** The bitrate as a formatted string in bps, Kbps or Mbps. */
23@property(nonatomic, readonly) NSString *bitrateString;
24
25/** Converts the bitrate to a readable format in bps, Kbps or Mbps. */
26+ (NSString *)bitrateStringForBitrate:(double)bitrate;
27/** Updates the tracked bitrate with the new byte count. */
28- (void)updateBitrateWithCurrentByteCount:(NSInteger)byteCount;
29
30@end
31