Support camera size selection using -m/--camera-ar

In addition to --camera-size to specify an explicit size, make it
possible to select the camera size automatically, respecting the maximum
size (already used for display mirroring) and an aspect ratio.

For example, "scrcpy --video-source=camera" followed by:
 - (no additional arguments)
    : mirrors at the maximum size, any a-r
 - -m1920
    : only consider valid sizes having both dimensions not above 1920
 - --camera-ar=4:3
    : only consider valid sizes having an aspect ratio of 4:3 (+/- 10%)
 - -m2048 --camera-ar=1.6
    : only consider valid sizes having both dimensions not above 2048
      and an aspect ratio of 1.6 (+/- 10%)

Co-authored-by: Simon Chan <1330321+yume-chan@users.noreply.github.com>

app/scrcpy.1

@@ -458,8 +458,6 @@ The available encoders can be listed by \-\-list\-encoders.
 .BI "\-\-video\-source " source
 Select the video source (display or camera).
 
-Camera mirroring requires Android 12+.
-
 Default is display.
 
 .TP

app/src/cli.c

@@ -743,7 +743,6 @@ static const struct sc_option options[] = {
         .longopt = "video-source",
         .argdesc = "source",
         .text = "Select the video source (display or camera).\n"
-                "Camera mirroring requires Android 12+.\n"
                 "Default is display.",
     },
     {

server/src/main/java/com/genymobile/scrcpy/CameraAspectRatio.java

@@ -1,6 +1,6 @@
 package com.genymobile.scrcpy;
 
-public final class CameraAspectRatio {
+public class CameraAspectRatio {
     private static final float SENSOR = -1;
 
     private float ar;

server/src/main/java/com/genymobile/scrcpy/CameraCapture.java

@@ -135,31 +135,8 @@ public class CameraCapture extends SurfaceCapture {
             });
         }
 
-        Optional<android.util.Size> selected = stream.max((s1, s2) -> {
-            // Greater width is better
-            int cmp = Integer.compare(s1.getWidth(), s2.getWidth());
-            if (cmp != 0) {
-                return cmp;
-            }
-
-            if (targetAspectRatio != null) {
-                // Closer to the target aspect ratio is better
-                float ar1 = ((float) s1.getWidth() / s1.getHeight());
-                float arRatio1 = ar1 / targetAspectRatio;
-                float distance1 = Math.abs(1 - arRatio1);
-
-                float ar2 = ((float) s2.getWidth() / s2.getHeight());
-                float arRatio2 = ar2 / targetAspectRatio;
-                float distance2 = Math.abs(1 - arRatio2);
-
-                // Reverse the order because lower distance is better
-                return Float.compare(distance2, distance1);
-            }
-
-            // Greater height is better
-            return Integer.compare(s1.getHeight(), s2.getHeight());
-        });
-
+        Optional<android.util.Size> selected = stream.min(
+                Comparator.comparing(android.util.Size::getWidth).thenComparing(android.util.Size::getHeight).reversed());
         if (selected.isPresent()) {
             android.util.Size size = selected.get();
             return new Size(size.getWidth(), size.getHeight());
@@ -229,11 +206,13 @@ public class CameraCapture extends SurfaceCapture {
     @SuppressLint("MissingPermission")
     @TargetApi(Build.VERSION_CODES.S)
     private CameraDevice openCamera(String id) throws CameraAccessException, InterruptedException {
+        Ln.v("Open Camera: " + id);
+
         CompletableFuture<CameraDevice> future = new CompletableFuture<>();
         ServiceManager.getCameraManager().openCamera(id, new CameraDevice.StateCallback() {
             @Override
             public void onOpened(CameraDevice camera) {
-                Ln.d("Camera opened successfully");
+                Ln.v("Open Camera Success");
                 future.complete(camera);
             }
 
@@ -276,13 +255,17 @@ public class CameraCapture extends SurfaceCapture {
 
     @TargetApi(Build.VERSION_CODES.S)
     private CameraCaptureSession createCaptureSession(CameraDevice camera, Surface surface) throws CameraAccessException, InterruptedException {
+        Ln.d("Create Capture Session");
+
         CompletableFuture<CameraCaptureSession> future = new CompletableFuture<>();
+        // replace by createCaptureSession(SessionConfiguration)
         OutputConfiguration outputConfig = new OutputConfiguration(surface);
         List<OutputConfiguration> outputs = Arrays.asList(outputConfig);
         SessionConfiguration sessionConfig = new SessionConfiguration(SessionConfiguration.SESSION_REGULAR, outputs, cameraExecutor,
                 new CameraCaptureSession.StateCallback() {
                     @Override
                     public void onConfigured(CameraCaptureSession session) {
+                        Ln.d("Create Capture Session Success");
                         future.complete(session);
                     }
 
@@ -327,4 +310,4 @@ public class CameraCapture extends SurfaceCapture {
     public boolean isClosed() {
         return disconnected.get();
     }
-}
+}

server/src/main/java/com/genymobile/scrcpy/Server.java

@@ -2,6 +2,7 @@ package com.genymobile.scrcpy;
 
 import android.os.BatteryManager;
 import android.os.Build;
+import android.os.Looper;
 
 import java.io.IOException;
 import java.util.ArrayList;
@@ -88,12 +89,6 @@ public final class Server {
 
     private static void scrcpy(Options options) throws IOException, ConfigurationException {
         Ln.i("Device: [" + Build.MANUFACTURER + "] " + Build.BRAND + " " + Build.MODEL + " (Android " + Build.VERSION.RELEASE + ")");
-
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.S && options.getVideoSource() == VideoSource.CAMERA) {
-            Ln.e("Camera mirroring is not supported before Android 12");
-            throw new ConfigurationException("Camera mirroring is not supported");
-        }
-
         final Device device = new Device(options);
 
         Thread initThread = startInitThread(options);

server/src/main/java/com/genymobile/scrcpy/VideoSource.java

@@ -1,5 +1,7 @@
 package com.genymobile.scrcpy;
 
+import android.media.MediaRecorder;
+
 public enum VideoSource {
     DISPLAY("display"),
     CAMERA("camera");

server/src/main/java/com/genymobile/scrcpy/Workarounds.java

@@ -32,7 +32,7 @@ public final class Workarounds {
         Workarounds.prepareMainLooper();
 
         boolean mustFillAppInfo = false;
-        boolean mustFillBaseContext = false;
+        boolean mustFillBaseContext = true;
         boolean mustFillAppContext = false;
 
         if (Build.BRAND.equalsIgnoreCase("meizu")) {
@@ -66,7 +66,6 @@ public final class Workarounds {
 
         if (camera) {
             mustFillAppInfo = true;
-            mustFillBaseContext = true;
         }
 
         if (mustFillAppInfo) {

server/src/main/java/com/genymobile/scrcpy/wrappers/ServiceManager.java

@@ -1,6 +1,7 @@
 package com.genymobile.scrcpy.wrappers;
 
 import com.genymobile.scrcpy.FakeContext;
+import com.genymobile.scrcpy.Workarounds;
 
 import android.annotation.SuppressLint;
 import android.content.Context;