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170 lines
5.9 KiB
Java
170 lines
5.9 KiB
Java
package com.genymobile.scrcpy;
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import android.graphics.Rect;
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public final class ScreenInfo {
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/**
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* Device (physical) size, possibly cropped
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*/
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private final Rect contentRect; // device size, possibly cropped
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/**
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* Video size, possibly smaller than the device size, already taking the device rotation and crop into account.
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* <p>
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* However, it does not include the locked video orientation.
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*/
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private final Size unlockedVideoSize;
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/**
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* Device rotation, related to the natural device orientation (0, 1, 2 or 3)
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*/
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private final int deviceRotation;
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/**
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* The locked video orientation (-1: disabled, 0: normal, 1: 90° CCW, 2: 180°, 3: 90° CW)
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*/
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private final int lockedVideoOrientation;
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public ScreenInfo(Rect contentRect, Size unlockedVideoSize, int deviceRotation, int lockedVideoOrientation) {
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this.contentRect = contentRect;
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this.unlockedVideoSize = unlockedVideoSize;
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this.deviceRotation = deviceRotation;
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this.lockedVideoOrientation = lockedVideoOrientation;
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}
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public Rect getContentRect() {
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return contentRect;
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}
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/**
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* Return the video size as if locked video orientation was not set.
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*
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* @return the unlocked video size
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*/
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public Size getUnlockedVideoSize() {
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return unlockedVideoSize;
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}
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/**
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* Return the actual video size if locked video orientation is set.
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*
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* @return the actual video size
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*/
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public Size getVideoSize() {
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if (getVideoRotation() % 2 == 0) {
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return unlockedVideoSize;
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}
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return unlockedVideoSize.rotate();
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}
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public int getDeviceRotation() {
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return deviceRotation;
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}
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public ScreenInfo withDeviceRotation(int newDeviceRotation) {
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if (newDeviceRotation == deviceRotation) {
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return this;
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}
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// true if changed between portrait and landscape
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boolean orientationChanged = (deviceRotation + newDeviceRotation) % 2 != 0;
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Rect newContentRect;
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Size newUnlockedVideoSize;
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if (orientationChanged) {
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newContentRect = flipRect(contentRect);
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newUnlockedVideoSize = unlockedVideoSize.rotate();
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} else {
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newContentRect = contentRect;
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newUnlockedVideoSize = unlockedVideoSize;
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}
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return new ScreenInfo(newContentRect, newUnlockedVideoSize, newDeviceRotation, lockedVideoOrientation);
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}
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public static ScreenInfo computeScreenInfo(DisplayInfo displayInfo, Rect crop, int maxSize, int lockedVideoOrientation) {
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int rotation = displayInfo.getRotation();
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if (lockedVideoOrientation == Device.LOCK_VIDEO_ORIENTATION_INITIAL) {
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// The user requested to lock the video orientation to the current orientation
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lockedVideoOrientation = rotation;
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}
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Size deviceSize = displayInfo.getSize();
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Rect contentRect = new Rect(0, 0, deviceSize.getWidth(), deviceSize.getHeight());
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if (crop != null) {
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if (rotation % 2 != 0) { // 180s preserve dimensions
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// the crop (provided by the user) is expressed in the natural orientation
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crop = flipRect(crop);
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}
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if (!contentRect.intersect(crop)) {
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// intersect() changes contentRect so that it is intersected with crop
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Ln.w("Crop rectangle (" + formatCrop(crop) + ") does not intersect device screen (" + formatCrop(deviceSize.toRect()) + ")");
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contentRect = new Rect(); // empty
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}
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}
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Size videoSize = computeVideoSize(contentRect.width(), contentRect.height(), maxSize);
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return new ScreenInfo(contentRect, videoSize, rotation, lockedVideoOrientation);
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}
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private static String formatCrop(Rect rect) {
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return rect.width() + ":" + rect.height() + ":" + rect.left + ":" + rect.top;
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}
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private static Size computeVideoSize(int w, int h, int maxSize) {
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// Compute the video size and the padding of the content inside this video.
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// Principle:
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// - scale down the great side of the screen to maxSize (if necessary);
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// - scale down the other side so that the aspect ratio is preserved;
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// - round this value to the nearest multiple of 8 (H.264 only accepts multiples of 8)
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w &= ~7; // in case it's not a multiple of 8
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h &= ~7;
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if (maxSize > 0) {
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if (BuildConfig.DEBUG && maxSize % 8 != 0) {
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throw new AssertionError("Max size must be a multiple of 8");
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}
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boolean portrait = h > w;
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int major = portrait ? h : w;
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int minor = portrait ? w : h;
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if (major > maxSize) {
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int minorExact = minor * maxSize / major;
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// +4 to round the value to the nearest multiple of 8
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minor = (minorExact + 4) & ~7;
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major = maxSize;
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}
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w = portrait ? minor : major;
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h = portrait ? major : minor;
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}
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return new Size(w, h);
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}
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private static Rect flipRect(Rect crop) {
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return new Rect(crop.top, crop.left, crop.bottom, crop.right);
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}
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/**
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* Return the rotation to apply to the device rotation to get the requested locked video orientation
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*
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* @return the rotation offset
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*/
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public int getVideoRotation() {
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if (lockedVideoOrientation == -1) {
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// no offset
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return 0;
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}
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return (deviceRotation + 4 - lockedVideoOrientation) % 4;
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}
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/**
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* Return the rotation to apply to the requested locked video orientation to get the device rotation
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*
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* @return the (reverse) rotation offset
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*/
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public int getReverseVideoRotation() {
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if (lockedVideoOrientation == -1) {
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// no offset
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return 0;
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}
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return (lockedVideoOrientation + 4 - deviceRotation) % 4;
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}
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}
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