Add camera service support for SurfaceTexture.

This change enables the use of a SurfaceTexture in place of a Surface as
the destination of camera preview frames.

Change-Id: Ic70d404c8fe261e9d5da6f1de93d6babb5b191cb

1 files changed, 20 insertions, 0 deletions

diff --git a/camera/ICamera.cpp b/camera/ICamera.cpp
index 7ba8d12..0881d65 100644
--- a/camera/ICamera.cpp
+++ b/camera/ICamera.cpp
@@ -28,6 +28,7 @@ namespace android {
 enum {
     DISCONNECT = IBinder::FIRST_CALL_TRANSACTION,
     SET_PREVIEW_DISPLAY,
+    SET_PREVIEW_TEXTURE,
     SET_PREVIEW_CALLBACK_FLAG,
     START_PREVIEW,
     STOP_PREVIEW,
@@ -78,6 +79,18 @@ public:
         return reply.readInt32();
     }
 
+    // pass the buffered SurfaceTexture to the camera service
+    status_t setPreviewTexture(const sp<ISurfaceTexture>& surfaceTexture)
+    {
+        LOGV("setPreviewTexture");
+        Parcel data, reply;
+        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
+        sp<IBinder> b(surfaceTexture->asBinder());
+        data.writeStrongBinder(b);
+        remote()->transact(SET_PREVIEW_TEXTURE, data, &reply);
+        return reply.readInt32();
+    }
+
     // set the preview callback flag to affect how the received frames from
     // preview are handled. See Camera.h for details.
     void setPreviewCallbackFlag(int flag)
@@ -296,6 +309,13 @@ status_t BnCamera::onTransact(
             reply->writeInt32(setPreviewDisplay(surface));
             return NO_ERROR;
         } break;
+        case SET_PREVIEW_TEXTURE: {
+            LOGV("SET_PREVIEW_TEXTURE");
+            CHECK_INTERFACE(ICamera, data, reply);
+            sp<ISurfaceTexture> st = interface_cast<ISurfaceTexture>(data.readStrongBinder());
+            reply->writeInt32(setPreviewTexture(st));
+            return NO_ERROR;
+        } break;
         case SET_PREVIEW_CALLBACK_FLAG: {
             LOGV("SET_PREVIEW_CALLBACK_TYPE");
             CHECK_INTERFACE(ICamera, data, reply);