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Side by Side Diff: webrtc/examples/androidapp/src/org/appspot/apprtc/CaptureQualityController.java

Issue 2377003002: Format all Java in WebRTC. (Closed)
Patch Set: Rebase. Created 4 years, 2 months ago
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1 /* 1 /*
2 * Copyright 2015 The WebRTC Project Authors. All rights reserved. 2 * Copyright 2015 The WebRTC Project Authors. All rights reserved.
3 * 3 *
4 * Use of this source code is governed by a BSD-style license 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 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 6 * tree. An additional intellectual property rights grant can be found
7 * in the file PATENTS. All contributing project authors may 7 * in the file PATENTS. All contributing project authors may
8 * be found in the AUTHORS file in the root of the source tree. 8 * be found in the AUTHORS file in the root of the source tree.
9 */ 9 */
10 10
11 package org.appspot.apprtc; 11 package org.appspot.apprtc;
12 12
13 import android.widget.SeekBar; 13 import android.widget.SeekBar;
14 import android.widget.TextView; 14 import android.widget.TextView;
15 15
16 import org.webrtc.CameraEnumerationAndroid.CaptureFormat; 16 import org.webrtc.CameraEnumerationAndroid.CaptureFormat;
17 17
18 import java.util.Arrays; 18 import java.util.Arrays;
19 import java.util.Collections; 19 import java.util.Collections;
20 import java.util.Comparator; 20 import java.util.Comparator;
21 import java.util.List; 21 import java.util.List;
22 22
23 /** 23 /**
24 * Control capture format based on a seekbar listener. 24 * Control capture format based on a seekbar listener.
25 */ 25 */
26 public class CaptureQualityController implements SeekBar.OnSeekBarChangeListener { 26 public class CaptureQualityController implements SeekBar.OnSeekBarChangeListener {
27 private final List<CaptureFormat> formats = Arrays.asList( 27 private final List<CaptureFormat> formats =
28 new CaptureFormat(1280, 720, 0, 30000), 28 Arrays.asList(new CaptureFormat(1280, 720, 0, 30000), new CaptureFormat(96 0, 540, 0, 30000),
29 new CaptureFormat(960, 540, 0, 30000), 29 new CaptureFormat(640, 480, 0, 30000), new CaptureFormat(480, 360, 0, 30000),
30 new CaptureFormat(640, 480, 0, 30000), 30 new CaptureFormat(320, 240, 0, 30000), new CaptureFormat(256, 144, 0, 30000));
31 new CaptureFormat(480, 360, 0, 30000),
32 new CaptureFormat(320, 240, 0, 30000),
33 new CaptureFormat(256, 144, 0, 30000));
34 // Prioritize framerate below this threshold and resolution above the threshol d. 31 // Prioritize framerate below this threshold and resolution above the threshol d.
35 private static final int FRAMERATE_THRESHOLD = 15; 32 private static final int FRAMERATE_THRESHOLD = 15;
36 private TextView captureFormatText; 33 private TextView captureFormatText;
37 private CallFragment.OnCallEvents callEvents; 34 private CallFragment.OnCallEvents callEvents;
38 private int width = 0; 35 private int width = 0;
39 private int height = 0; 36 private int height = 0;
40 private int framerate = 0; 37 private int framerate = 0;
41 private double targetBandwidth = 0; 38 private double targetBandwidth = 0;
42 39
43 public CaptureQualityController( 40 public CaptureQualityController(
44 TextView captureFormatText, CallFragment.OnCallEvents callEvents) { 41 TextView captureFormatText, CallFragment.OnCallEvents callEvents) {
45 this.captureFormatText = captureFormatText; 42 this.captureFormatText = captureFormatText;
46 this.callEvents = callEvents; 43 this.callEvents = callEvents;
47 } 44 }
48 45
49 private final Comparator<CaptureFormat> compareFormats = new Comparator<Captur eFormat>() { 46 private final Comparator<CaptureFormat> compareFormats = new Comparator<Captur eFormat>() {
50 @Override 47 @Override
51 public int compare(CaptureFormat first, CaptureFormat second) { 48 public int compare(CaptureFormat first, CaptureFormat second) {
52 int firstFps = calculateFramerate(targetBandwidth, first); 49 int firstFps = calculateFramerate(targetBandwidth, first);
53 int secondFps = calculateFramerate(targetBandwidth, second); 50 int secondFps = calculateFramerate(targetBandwidth, second);
54 51
55 if (firstFps >= FRAMERATE_THRESHOLD && secondFps >= FRAMERATE_THRESHOLD 52 if (firstFps >= FRAMERATE_THRESHOLD && secondFps >= FRAMERATE_THRESHOLD
56 || firstFps == secondFps) { 53 || firstFps == secondFps) {
57 // Compare resolution. 54 // Compare resolution.
58 return first.width * first.height - second.width * second.height; 55 return first.width * first.height - second.width * second.height;
59 } else { 56 } else {
60 // Compare fps. 57 // Compare fps.
61 return firstFps - secondFps; 58 return firstFps - secondFps;
62 } 59 }
63 } 60 }
64 }; 61 };
65 62
66 @Override 63 @Override
67 public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 64 public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
68 if (progress == 0) { 65 if (progress == 0) {
69 width = 0; 66 width = 0;
70 height = 0; 67 height = 0;
71 framerate = 0; 68 framerate = 0;
72 captureFormatText.setText(R.string.muted); 69 captureFormatText.setText(R.string.muted);
73 return; 70 return;
74 } 71 }
75 72
76 // Extract max bandwidth (in millipixels / second). 73 // Extract max bandwidth (in millipixels / second).
77 long maxCaptureBandwidth = java.lang.Long.MIN_VALUE; 74 long maxCaptureBandwidth = java.lang.Long.MIN_VALUE;
78 for (CaptureFormat format : formats) { 75 for (CaptureFormat format : formats) {
79 maxCaptureBandwidth = Math.max(maxCaptureBandwidth, 76 maxCaptureBandwidth =
80 (long) format.width * format.height * format.framerate.max); 77 Math.max(maxCaptureBandwidth, (long) format.width * format.height * fo rmat.framerate.max);
81 } 78 }
82 79
83 // Fraction between 0 and 1. 80 // Fraction between 0 and 1.
84 double bandwidthFraction = (double) progress / 100.0; 81 double bandwidthFraction = (double) progress / 100.0;
85 // Make a log-scale transformation, still between 0 and 1. 82 // Make a log-scale transformation, still between 0 and 1.
86 final double kExpConstant = 3.0; 83 final double kExpConstant = 3.0;
87 bandwidthFraction = 84 bandwidthFraction =
88 (Math.exp(kExpConstant * bandwidthFraction) - 1) / (Math.exp(kExpConstan t) - 1); 85 (Math.exp(kExpConstant * bandwidthFraction) - 1) / (Math.exp(kExpConstan t) - 1);
89 targetBandwidth = bandwidthFraction * maxCaptureBandwidth; 86 targetBandwidth = bandwidthFraction * maxCaptureBandwidth;
90 87
91 // Choose the best format given a target bandwidth. 88 // Choose the best format given a target bandwidth.
92 final CaptureFormat bestFormat = Collections.max(formats, compareFormats); 89 final CaptureFormat bestFormat = Collections.max(formats, compareFormats);
93 width = bestFormat.width; 90 width = bestFormat.width;
94 height = bestFormat.height; 91 height = bestFormat.height;
95 framerate = calculateFramerate(targetBandwidth, bestFormat); 92 framerate = calculateFramerate(targetBandwidth, bestFormat);
96 captureFormatText.setText(width + "x" + height + " @ " + framerate + "fps"); 93 captureFormatText.setText(width + "x" + height + " @ " + framerate + "fps");
97 } 94 }
98 95
99 @Override 96 @Override
100 public void onStartTrackingTouch(SeekBar seekBar) { 97 public void onStartTrackingTouch(SeekBar seekBar) {}
101 }
102 98
103 @Override 99 @Override
104 public void onStopTrackingTouch(SeekBar seekBar) { 100 public void onStopTrackingTouch(SeekBar seekBar) {
105 callEvents.onCaptureFormatChange(width, height, framerate); 101 callEvents.onCaptureFormatChange(width, height, framerate);
106 } 102 }
107 103
108 // Return the highest frame rate possible based on bandwidth and format. 104 // Return the highest frame rate possible based on bandwidth and format.
109 private int calculateFramerate(double bandwidth, CaptureFormat format) { 105 private int calculateFramerate(double bandwidth, CaptureFormat format) {
110 return (int) Math.round(Math.min(format.framerate.max, 106 return (int) Math.round(
111 (int) Math.round(bandwidth / (format.width * format.height))) / 1000.0); 107 Math.min(format.framerate.max, (int) Math.round(bandwidth / (format.widt h * format.height)))
108 / 1000.0);
112 } 109 }
113 } 110 }
114
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