diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 17:32:43 +0000 |
commit | 6bf0a5cb5034a7e684dcc3500e841785237ce2dd (patch) | |
tree | a68f146d7fa01f0134297619fbe7e33db084e0aa /third_party/libwebrtc/sdk/android/api/org/webrtc/CameraEnumerationAndroid.java | |
parent | Initial commit. (diff) | |
download | thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.tar.xz thunderbird-6bf0a5cb5034a7e684dcc3500e841785237ce2dd.zip |
Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | third_party/libwebrtc/sdk/android/api/org/webrtc/CameraEnumerationAndroid.java | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/third_party/libwebrtc/sdk/android/api/org/webrtc/CameraEnumerationAndroid.java b/third_party/libwebrtc/sdk/android/api/org/webrtc/CameraEnumerationAndroid.java new file mode 100644 index 0000000000..0c3188fffe --- /dev/null +++ b/third_party/libwebrtc/sdk/android/api/org/webrtc/CameraEnumerationAndroid.java @@ -0,0 +1,206 @@ +/* + * Copyright 2015 The WebRTC project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +package org.webrtc; + +import static java.lang.Math.abs; + +import android.graphics.ImageFormat; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.Collections; +import java.util.Comparator; +import java.util.List; + +@SuppressWarnings("deprecation") +public class CameraEnumerationAndroid { + private final static String TAG = "CameraEnumerationAndroid"; + + static final ArrayList<Size> COMMON_RESOLUTIONS = new ArrayList<Size>(Arrays.asList( + // 0, Unknown resolution + new Size(160, 120), // 1, QQVGA + new Size(240, 160), // 2, HQVGA + new Size(320, 240), // 3, QVGA + new Size(400, 240), // 4, WQVGA + new Size(480, 320), // 5, HVGA + new Size(640, 360), // 6, nHD + new Size(640, 480), // 7, VGA + new Size(768, 480), // 8, WVGA + new Size(854, 480), // 9, FWVGA + new Size(800, 600), // 10, SVGA + new Size(960, 540), // 11, qHD + new Size(960, 640), // 12, DVGA + new Size(1024, 576), // 13, WSVGA + new Size(1024, 600), // 14, WVSGA + new Size(1280, 720), // 15, HD + new Size(1280, 1024), // 16, SXGA + new Size(1920, 1080), // 17, Full HD + new Size(1920, 1440), // 18, Full HD 4:3 + new Size(2560, 1440), // 19, QHD + new Size(3840, 2160) // 20, UHD + )); + + public static class CaptureFormat { + // Class to represent a framerate range. The framerate varies because of lightning conditions. + // The values are multiplied by 1000, so 1000 represents one frame per second. + public static class FramerateRange { + public int min; + public int max; + + public FramerateRange(int min, int max) { + this.min = min; + this.max = max; + } + + @Override + public String toString() { + return "[" + (min / 1000.0f) + ":" + (max / 1000.0f) + "]"; + } + + @Override + public boolean equals(Object other) { + if (!(other instanceof FramerateRange)) { + return false; + } + final FramerateRange otherFramerate = (FramerateRange) other; + return min == otherFramerate.min && max == otherFramerate.max; + } + + @Override + public int hashCode() { + // Use prime close to 2^16 to avoid collisions for normal values less than 2^16. + return 1 + 65537 * min + max; + } + } + + public final int width; + public final int height; + public final FramerateRange framerate; + + // TODO(hbos): If VideoCapturer.startCapture is updated to support other image formats then this + // needs to be updated and VideoCapturer.getSupportedFormats need to return CaptureFormats of + // all imageFormats. + public final int imageFormat = ImageFormat.NV21; + + public CaptureFormat(int width, int height, int minFramerate, int maxFramerate) { + this.width = width; + this.height = height; + this.framerate = new FramerateRange(minFramerate, maxFramerate); + } + + public CaptureFormat(int width, int height, FramerateRange framerate) { + this.width = width; + this.height = height; + this.framerate = framerate; + } + + // Calculates the frame size of this capture format. + public int frameSize() { + return frameSize(width, height, imageFormat); + } + + // Calculates the frame size of the specified image format. Currently only + // supporting ImageFormat.NV21. + // The size is width * height * number of bytes per pixel. + // http://developer.android.com/reference/android/hardware/Camera.html#addCallbackBuffer(byte[]) + public static int frameSize(int width, int height, int imageFormat) { + if (imageFormat != ImageFormat.NV21) { + throw new UnsupportedOperationException("Don't know how to calculate " + + "the frame size of non-NV21 image formats."); + } + return (width * height * ImageFormat.getBitsPerPixel(imageFormat)) / 8; + } + + @Override + public String toString() { + return width + "x" + height + "@" + framerate; + } + + @Override + public boolean equals(Object other) { + if (!(other instanceof CaptureFormat)) { + return false; + } + final CaptureFormat otherFormat = (CaptureFormat) other; + return width == otherFormat.width && height == otherFormat.height + && framerate.equals(otherFormat.framerate); + } + + @Override + public int hashCode() { + return 1 + (width * 65497 + height) * 251 + framerate.hashCode(); + } + } + + // Helper class for finding the closest supported format for the two functions below. It creates a + // comparator based on the difference to some requested parameters, where the element with the + // minimum difference is the element that is closest to the requested parameters. + private static abstract class ClosestComparator<T> implements Comparator<T> { + // Difference between supported and requested parameter. + abstract int diff(T supportedParameter); + + @Override + public int compare(T t1, T t2) { + return diff(t1) - diff(t2); + } + } + + // Prefer a fps range with an upper bound close to `framerate`. Also prefer a fps range with a low + // lower bound, to allow the framerate to fluctuate based on lightning conditions. + public static CaptureFormat.FramerateRange getClosestSupportedFramerateRange( + List<CaptureFormat.FramerateRange> supportedFramerates, final int requestedFps) { + return Collections.min( + supportedFramerates, new ClosestComparator<CaptureFormat.FramerateRange>() { + // Progressive penalty if the upper bound is further away than `MAX_FPS_DIFF_THRESHOLD` + // from requested. + private static final int MAX_FPS_DIFF_THRESHOLD = 5000; + private static final int MAX_FPS_LOW_DIFF_WEIGHT = 1; + private static final int MAX_FPS_HIGH_DIFF_WEIGHT = 3; + + // Progressive penalty if the lower bound is bigger than `MIN_FPS_THRESHOLD`. + private static final int MIN_FPS_THRESHOLD = 8000; + private static final int MIN_FPS_LOW_VALUE_WEIGHT = 1; + private static final int MIN_FPS_HIGH_VALUE_WEIGHT = 4; + + // Use one weight for small `value` less than `threshold`, and another weight above. + private int progressivePenalty(int value, int threshold, int lowWeight, int highWeight) { + return (value < threshold) ? value * lowWeight + : threshold * lowWeight + (value - threshold) * highWeight; + } + + @Override + int diff(CaptureFormat.FramerateRange range) { + final int minFpsError = progressivePenalty( + range.min, MIN_FPS_THRESHOLD, MIN_FPS_LOW_VALUE_WEIGHT, MIN_FPS_HIGH_VALUE_WEIGHT); + final int maxFpsError = progressivePenalty(Math.abs(requestedFps * 1000 - range.max), + MAX_FPS_DIFF_THRESHOLD, MAX_FPS_LOW_DIFF_WEIGHT, MAX_FPS_HIGH_DIFF_WEIGHT); + return minFpsError + maxFpsError; + } + }); + } + + public static Size getClosestSupportedSize( + List<Size> supportedSizes, final int requestedWidth, final int requestedHeight) { + return Collections.min(supportedSizes, new ClosestComparator<Size>() { + @Override + int diff(Size size) { + return abs(requestedWidth - size.width) + abs(requestedHeight - size.height); + } + }); + } + + // Helper method for camera classes. + static void reportCameraResolution(Histogram histogram, Size resolution) { + int index = COMMON_RESOLUTIONS.indexOf(resolution); + // 0 is reserved for unknown resolution, so add 1. + // indexOf returns -1 for unknown resolutions so it becomes 0 automatically. + histogram.addSample(index + 1); + } +} |