Android Tango depth camera capture support.

media/capture/video/android/java/src/org/chromium/media/VideoCaptureFactory.java

Index: media/capture/video/android/java/src/org/chromium/media/VideoCaptureFactory.java
diff --git a/media/capture/video/android/java/src/org/chromium/media/VideoCaptureFactory.java b/media/capture/video/android/java/src/org/chromium/media/VideoCaptureFactory.java
index 2b4a301c6c7158df253329d55396604c615f774c..76fd843536f2f2930ee4621c17ff0023eade525d 100644
--- a/media/capture/video/android/java/src/org/chromium/media/VideoCaptureFactory.java
+++ b/media/capture/video/android/java/src/org/chromium/media/VideoCaptureFactory.java
@@ -15,10 +15,12 @@ import org.chromium.base.annotations.JNINamespace;
 
 /**
  * This class implements a factory of Android Video Capture objects for Chrome.
- * Cameras are identified by |id|. Video Capture objects allocated via
+ * The createVideoCapture() returns either a "standard" VideoCaptureCamera or a
+ * VideoCaptureTango. Cameras are identified by |id|, where Tango cameras have
+ * |id| above the standard ones. Video Capture objects allocated via
  * createVideoCapture() are explicitly owned by the caller. ChromiumCameraInfo
- * is an internal class with some static methods needed from the rest of the
- * class to manipulate the |id|s of devices.
+ * is an internal class with static methods used by the rest of the class to
+ * manipulate the |id|s of cameras.
  **/
 @JNINamespace("media")
 @SuppressWarnings("deprecation")
@@ -28,6 +30,16 @@ class VideoCaptureFactory {
         private static int sNumberOfSystemCameras = -1;
         private static final String TAG = "cr.media";
 
+        private static boolean isTangoCamera(int id) {
+            // Tango cameras' Id range is above standard cameras Id range.
+            return id >= sNumberOfSystemCameras;
+        }
+
+        private static int toTangoCameraId(int id) {
+            assert isTangoCamera(id);
+            return id - sNumberOfSystemCameras;
+        }
+
         private static int getNumberOfCameras() {
             if (sNumberOfSystemCameras == -1) {
                 // getNumberOfCameras() would not fail due to lack of permission, but the
@@ -53,7 +65,7 @@ class VideoCaptureFactory {
                     }
                 }
             }
-            return sNumberOfSystemCameras;
+            return sNumberOfSystemCameras + VideoCaptureTango.getNumberOfCameras();
         }
     }
 
@@ -69,6 +81,10 @@ class VideoCaptureFactory {
     // Factory methods.
     @CalledByNative
     static VideoCapture createVideoCapture(int id, long nativeVideoCaptureDeviceAndroid) {
+        if (ChromiumCameraInfo.isTangoCamera(id)) {
+            return new VideoCaptureTango(
+                    ChromiumCameraInfo.toTangoCameraId(id), nativeVideoCaptureDeviceAndroid);
+        }
         if (isLReleaseOrLater() && !VideoCaptureCamera2.isLegacyDevice(id)) {
             return new VideoCaptureCamera2(id, nativeVideoCaptureDeviceAndroid);
         }
@@ -82,14 +98,21 @@ class VideoCaptureFactory {
 
     @CalledByNative
     static int getCaptureApiType(int id) {
+        if (ChromiumCameraInfo.isTangoCamera(id)) {
+            return VideoCaptureTango.getCaptureApiType(ChromiumCameraInfo.toTangoCameraId(id));
+        }
         if (isLReleaseOrLater()) {
             return VideoCaptureCamera2.getCaptureApiType(id);
+        } else {
+            return VideoCaptureCamera.getCaptureApiType(id);
         }
-        return VideoCaptureCamera.getCaptureApiType(id);
     }
 
     @CalledByNative
     static String getDeviceName(int id) {
+        if (ChromiumCameraInfo.isTangoCamera(id)) {
+            return VideoCaptureTango.getName(ChromiumCameraInfo.toTangoCameraId(id));
+        }
         if (isLReleaseOrLater() && !VideoCaptureCamera2.isLegacyDevice(id)) {
             return VideoCaptureCamera2.getName(id);
         }
@@ -98,6 +121,10 @@ class VideoCaptureFactory {
 
     @CalledByNative
     static VideoCaptureFormat[] getDeviceSupportedFormats(int id) {
+        if (ChromiumCameraInfo.isTangoCamera(id)) {
+            return VideoCaptureTango.getDeviceSupportedFormats(
+                    ChromiumCameraInfo.toTangoCameraId(id));
+        }
         if (isLReleaseOrLater() && !VideoCaptureCamera2.isLegacyDevice(id)) {
             return VideoCaptureCamera2.getDeviceSupportedFormats(id);
         }