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