Camera: Add input side to camera3 HAL device
- Stream creation/deletion
- Request submission
- Request thread loop
- Add get() to CameraMetadata to allow HAL submission while retaining
ownership.
Change-Id: I271f72bcbe9557eded43cbcbfe789109857f8144
diff --git a/include/camera/CameraMetadata.h b/include/camera/CameraMetadata.h
index 4289126..8eeb2e7 100644
--- a/include/camera/CameraMetadata.h
+++ b/include/camera/CameraMetadata.h
@@ -49,6 +49,23 @@
CameraMetadata &operator=(const camera_metadata_t *buffer);
/**
+ * Get reference to the underlying metadata buffer. Ownership remains with
+ * the CameraMetadata object, but non-const CameraMetadata methods will not
+ * work until unlock() is called. Note that the lock has nothing to do with
+ * thread-safety, it simply prevents the camera_metadata_t pointer returned
+ * here from being accidentally invalidated by CameraMetadata operations.
+ */
+ const camera_metadata_t* getAndLock();
+
+ /**
+ * Unlock the CameraMetadata for use again. After this unlock, the pointer
+ * given from getAndLock() may no longer be used. The pointer passed out
+ * from getAndLock must be provided to guarantee that the right object is
+ * being unlocked.
+ */
+ status_t unlock(const camera_metadata_t *buffer);
+
+ /**
* Release a raw metadata buffer to the caller. After this call,
* CameraMetadata no longer references the buffer, and the caller takes
* responsibility for freeing the raw metadata buffer (using
@@ -154,6 +171,7 @@
private:
camera_metadata_t *mBuffer;
+ bool mLocked;
/**
* Check if tag has a given type
@@ -163,7 +181,7 @@
/**
* Base update entry method
*/
- status_t update(uint32_t tag, const void *data, size_t data_count);
+ status_t updateImpl(uint32_t tag, const void *data, size_t data_count);
/**
* Resize metadata buffer if needed by reallocating it and copying it over.