Camera: Add preview callback surface support

- Add call to set a preview callback surface
- Implement support for HAL2/3 devices
- Still need HAL1 implementation

Change-Id: I0dc0bd72e43d871aa487858d1665c1efca633ffe

1 files changed, 21 insertions, 0 deletions

diff --git a/camera/ICamera.cpp b/camera/ICamera.cpp
index 8900867..732c204 100644
--- a/camera/ICamera.cpp
+++ b/camera/ICamera.cpp
@@ -31,6 +31,7 @@ enum {
     DISCONNECT = IBinder::FIRST_CALL_TRANSACTION,
     SET_PREVIEW_TEXTURE,
     SET_PREVIEW_CALLBACK_FLAG,
+    SET_PREVIEW_CALLBACK_TARGET,
     START_PREVIEW,
     STOP_PREVIEW,
     AUTO_FOCUS,
@@ -90,6 +91,18 @@ public:
         remote()->transact(SET_PREVIEW_CALLBACK_FLAG, data, &reply);
     }
 
+    status_t setPreviewCallbackTarget(
+            const sp<IGraphicBufferProducer>& callbackProducer)
+    {
+        ALOGV("setPreviewCallbackTarget");
+        Parcel data, reply;
+        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
+        sp<IBinder> b(callbackProducer->asBinder());
+        data.writeStrongBinder(b);
+        remote()->transact(SET_PREVIEW_CALLBACK_TARGET, data, &reply);
+        return reply.readInt32();
+    }
+
     // start preview mode, must call setPreviewDisplay first
     status_t startPreview()
     {
@@ -285,6 +298,14 @@ status_t BnCamera::onTransact(
             setPreviewCallbackFlag(callback_flag);
             return NO_ERROR;
         } break;
+        case SET_PREVIEW_CALLBACK_TARGET: {
+            ALOGV("SET_PREVIEW_CALLBACK_TARGET");
+            CHECK_INTERFACE(ICamera, data, reply);
+            sp<IGraphicBufferProducer> cp =
+                interface_cast<IGraphicBufferProducer>(data.readStrongBinder());
+            reply->writeInt32(setPreviewCallbackTarget(cp));
+            return NO_ERROR;
+        }
         case START_PREVIEW: {
             ALOGV("START_PREVIEW");
             CHECK_INTERFACE(ICamera, data, reply);