Camera3: add camera3 buffer manager support
* Add camera buffer manager for buffer allocation and sharing management across
multiple streams. Only gralloc v0 implementation is done, v1 implementation is
pending. With this, the max mem footprint for multiple streams in the same
stream set will be the max buffer count x max buffer size.
* API1 client will still use the old bufferQueue code path, buffer manager
is only targeting at API2 clients.
* Prepare and teardown should work with buffer manager.
* Some existing code typo fix and cleanup (to fix the compiling warnings).
Bug: 25088440
Change-Id: I68b246faa43080302acd02a8e976384bd3e26a23
diff --git a/services/camera/libcameraservice/device3/Camera3Stream.h b/services/camera/libcameraservice/device3/Camera3Stream.h
index 753280b..fe51ab5 100644
--- a/services/camera/libcameraservice/device3/Camera3Stream.h
+++ b/services/camera/libcameraservice/device3/Camera3Stream.h
@@ -130,6 +130,11 @@
int getId() const;
/**
+ * Get the output stream set id.
+ */
+ int getStreamSetId() const;
+
+ /**
* Get the stream's dimensions and format
*/
uint32_t getWidth() const;
@@ -350,6 +355,21 @@
protected:
const int mId;
+ /**
+ * Stream set id, used to indicate which group of this stream belongs to for buffer sharing
+ * across multiple streams.
+ *
+ * The default value is set to CAMERA3_STREAM_SET_ID_INVALID, which indicates that this stream
+ * doesn't intend to share buffers with any other streams, and this stream will fall back to
+ * the existing BufferQueue mechanism to manage the buffer allocations and buffer circulation.
+ * When a valid stream set id is set, this stream intends to use the Camera3BufferManager to
+ * manage the buffer allocations; the BufferQueue will only handle the buffer transaction
+ * between the producer and consumer. For this case, upon successfully registration, the streams
+ * with the same stream set id will potentially share the buffers allocated by
+ * Camera3BufferManager.
+ */
+ const int mSetId;
+
const String8 mName;
// Zero for formats with fixed buffer size for given dimensions.
const size_t mMaxSize;
@@ -367,7 +387,8 @@
Camera3Stream(int id, camera3_stream_type type,
uint32_t width, uint32_t height, size_t maxSize, int format,
- android_dataspace dataSpace, camera3_stream_rotation_t rotation);
+ android_dataspace dataSpace, camera3_stream_rotation_t rotation,
+ int setId);
/**
* Interface to be implemented by derived classes