camera3: Pass vendor tags through binder.

Bug: 12134423

- Adds a class for parceling vendor tag definitions.
- Passes vendor tag definitions to clients of the camera service.
- Switches over to new vendor tag mechanism when reading from HAL.

Change-Id: Icef3fe9e67160767bdb8244ac49c85b68b497123

1 files changed, 36 insertions, 0 deletions

diff --git a/camera/ICameraService.cpp b/camera/ICameraService.cpp
index 5fc89fb..ef6c0f4 100644
--- a/camera/ICameraService.cpp
+++ b/camera/ICameraService.cpp
@@ -17,6 +17,7 @@
 
 #define LOG_TAG "BpCameraService"
 #include <utils/Log.h>
+#include <utils/Errors.h>
 
 #include <stdint.h>
 #include <sys/types.h>
@@ -34,6 +35,7 @@
 #include <camera/camera2/ICameraDeviceUser.h>
 #include <camera/camera2/ICameraDeviceCallbacks.h>
 #include <camera/CameraMetadata.h>
+#include <camera/VendorTagDescriptor.h>
 
 namespace android {
 
@@ -143,6 +145,24 @@ public:
         return result;
     }
 
+    // Get enumeration and description of vendor tags for camera
+    virtual status_t getCameraVendorTagDescriptor(/*out*/sp<VendorTagDescriptor>& desc) {
+        Parcel data, reply;
+        data.writeInterfaceToken(ICameraService::getInterfaceDescriptor());
+        remote()->transact(BnCameraService::GET_CAMERA_VENDOR_TAG_DESCRIPTOR, data, &reply);
+
+        if (readExceptionCode(reply)) return -EPROTO;
+        status_t result = reply.readInt32();
+
+        if (reply.readInt32() != 0) {
+            sp<VendorTagDescriptor> d;
+            if (VendorTagDescriptor::createFromParcel(&reply, /*out*/d) == OK) {
+                desc = d;
+            }
+        }
+        return result;
+    }
+
     // connect to camera service (android.hardware.Camera)
     virtual status_t connect(const sp<ICameraClient>& cameraClient, int cameraId,
                              const String16 &clientPackageName, int clientUid,
@@ -275,6 +295,22 @@ status_t BnCameraService::onTransact(
             info.writeToParcel(reply);
             return NO_ERROR;
         } break;
+        case GET_CAMERA_VENDOR_TAG_DESCRIPTOR: {
+            CHECK_INTERFACE(ICameraService, data, reply);
+            sp<VendorTagDescriptor> d;
+            status_t result = getCameraVendorTagDescriptor(d);
+            reply->writeNoException();
+            reply->writeInt32(result);
+
+            // out-variables are after exception and return value
+            reply->writeInt32(1); // means the parcelable is included
+            if (d == NULL) {
+                reply->writeInt32(0);
+            } else {
+                d->writeToParcel(reply);
+            }
+            return NO_ERROR;
+        } break;
         case CONNECT: {
             CHECK_INTERFACE(ICameraService, data, reply);
             sp<ICameraClient> cameraClient =