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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 |
| (...skipping 59 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... |
| 70 height = 0; | 70 height = 0; |
| 71 framerate = 0; | 71 framerate = 0; |
| 72 captureFormatText.setText(R.string.muted); | 72 captureFormatText.setText(R.string.muted); |
| 73 return; | 73 return; |
| 74 } | 74 } |
| 75 | 75 |
| 76 // Extract max bandwidth (in millipixels / second). | 76 // Extract max bandwidth (in millipixels / second). |
| 77 long maxCaptureBandwidth = java.lang.Long.MIN_VALUE; | 77 long maxCaptureBandwidth = java.lang.Long.MIN_VALUE; |
| 78 for (CaptureFormat format : formats) { | 78 for (CaptureFormat format : formats) { |
| 79 maxCaptureBandwidth = Math.max(maxCaptureBandwidth, | 79 maxCaptureBandwidth = Math.max(maxCaptureBandwidth, |
| 80 (long) format.width * format.height * format.framerate.max); | 80 (long) format.width * format.height * format.maxFramerate); |
| 81 } | 81 } |
| 82 | 82 |
| 83 // Fraction between 0 and 1. | 83 // Fraction between 0 and 1. |
| 84 double bandwidthFraction = (double) progress / 100.0; | 84 double bandwidthFraction = (double) progress / 100.0; |
| 85 // Make a log-scale transformation, still between 0 and 1. | 85 // Make a log-scale transformation, still between 0 and 1. |
| 86 final double kExpConstant = 3.0; | 86 final double kExpConstant = 3.0; |
| 87 bandwidthFraction = | 87 bandwidthFraction = |
| 88 (Math.exp(kExpConstant * bandwidthFraction) - 1) / (Math.exp(kExpConstan
t) - 1); | 88 (Math.exp(kExpConstant * bandwidthFraction) - 1) / (Math.exp(kExpConstan
t) - 1); |
| 89 targetBandwidth = bandwidthFraction * maxCaptureBandwidth; | 89 targetBandwidth = bandwidthFraction * maxCaptureBandwidth; |
| 90 | 90 |
| 91 // Choose the best format given a target bandwidth. | 91 // Choose the best format given a target bandwidth. |
| 92 final CaptureFormat bestFormat = Collections.max(formats, compareFormats); | 92 final CaptureFormat bestFormat = Collections.max(formats, compareFormats); |
| 93 width = bestFormat.width; | 93 width = bestFormat.width; |
| 94 height = bestFormat.height; | 94 height = bestFormat.height; |
| 95 framerate = calculateFramerate(targetBandwidth, bestFormat); | 95 framerate = calculateFramerate(targetBandwidth, bestFormat); |
| 96 captureFormatText.setText(width + "x" + height + " @ " + framerate + "fps"); | 96 captureFormatText.setText(width + "x" + height + " @ " + framerate + "fps"); |
| 97 } | 97 } |
| 98 | 98 |
| 99 @Override | 99 @Override |
| 100 public void onStartTrackingTouch(SeekBar seekBar) { | 100 public void onStartTrackingTouch(SeekBar seekBar) { |
| 101 } | 101 } |
| 102 | 102 |
| 103 @Override | 103 @Override |
| 104 public void onStopTrackingTouch(SeekBar seekBar) { | 104 public void onStopTrackingTouch(SeekBar seekBar) { |
| 105 callEvents.onCaptureFormatChange(width, height, framerate); | 105 callEvents.onCaptureFormatChange(width, height, framerate); |
| 106 } | 106 } |
| 107 | 107 |
| 108 // Return the highest frame rate possible based on bandwidth and format. | 108 // Return the highest frame rate possible based on bandwidth and format. |
| 109 private int calculateFramerate(double bandwidth, CaptureFormat format) { | 109 private int calculateFramerate(double bandwidth, CaptureFormat format) { |
| 110 return (int) Math.round(Math.min(format.framerate.max, | 110 return (int) Math.round(Math.min(format.maxFramerate, |
| 111 (int) Math.round(bandwidth / (format.width * format.height))) / 1000.0); | 111 (int) Math.round(bandwidth / (format.width * format.height))) / 1000.0); |
| 112 } | 112 } |
| 113 } | 113 } |
| 114 | 114 |
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