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Side by Side Diff: webrtc/examples/objc/AppRTCDemo/ARDBitrateTracker.m

Issue 2343403002: Rename AppRTCDemo on Android and iOS to AppRTCMobile (Closed)
Patch Set: Rebase Created 4 years, 2 months ago
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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 "ARDBitrateTracker.h"
12
13 #import <QuartzCore/QuartzCore.h>
14
15 @implementation ARDBitrateTracker {
16 CFTimeInterval _prevTime;
17 NSInteger _prevByteCount;
18 }
19
20 @synthesize bitrate = _bitrate;
21
22 + (NSString *)bitrateStringForBitrate:(double)bitrate {
23 if (bitrate > 1e6) {
24 return [NSString stringWithFormat:@"%.2fMbps", bitrate * 1e-6];
25 } else if (bitrate > 1e3) {
26 return [NSString stringWithFormat:@"%.0fKbps", bitrate * 1e-3];
27 } else {
28 return [NSString stringWithFormat:@"%.0fbps", bitrate];
29 }
30 }
31
32 - (NSString *)bitrateString {
33 return [[self class] bitrateStringForBitrate:_bitrate];
34 }
35
36 - (void)updateBitrateWithCurrentByteCount:(NSInteger)byteCount {
37 CFTimeInterval currentTime = CACurrentMediaTime();
38 if (_prevTime && (byteCount > _prevByteCount)) {
39 _bitrate = (byteCount - _prevByteCount) * 8 / (currentTime - _prevTime);
40 }
41 _prevByteCount = byteCount;
42 _prevTime = currentTime;
43 }
44
45 @end
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