Add the SurfaceTexture C++ implementation.
This change adds the C++ implementation of SurfaceTexture and related
classes. The goal of this is for a SurfaceTexture to be passed to
camera service or Stagefright in place of a Surface to allow camera
preview or decoded video frames to be streamed to an OpenGL ES texture
that an application can use.
Change-Id: I55c83a7017f1ecb81c9c9e3252cbd118b914296c
diff --git a/include/gui/ISurfaceTexture.h b/include/gui/ISurfaceTexture.h
new file mode 100644
index 0000000..77d37f1
--- /dev/null
+++ b/include/gui/ISurfaceTexture.h
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_GUI_ISURFACETEXTURE_H
+#define ANDROID_GUI_ISURFACETEXTURE_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+
+#include <binder/IInterface.h>
+
+#include <ui/GraphicBuffer.h>
+#include <ui/Rect.h>
+
+namespace android {
+// ----------------------------------------------------------------------------
+
+class ISurfaceTexture : public IInterface
+{
+public:
+ DECLARE_META_INTERFACE(SurfaceTexture);
+
+ // requestBuffer requests a new buffer for the given index. The server (i.e.
+ // the ISurfaceTexture implementation) assigns the newly created buffer to
+ // the given slot index, and the client is expected to mirror the
+ // slot->buffer mapping so that it's not necessary to transfer a
+ // GraphicBuffer for every dequeue operation.
+ virtual sp<GraphicBuffer> requestBuffer(int slot, uint32_t w, uint32_t h,
+ uint32_t format, uint32_t usage) = 0;
+
+ // setBufferCount sets the number of buffer slots available. Calling this
+ // will also cause all buffer slots to be emptied. The caller should empty
+ // its mirrored copy of the buffer slots when calling this method.
+ virtual status_t setBufferCount(int bufferCount) = 0;
+
+ // dequeueBuffer requests a new buffer slot for the client to use. Ownership
+ // of the slot is transfered to the client, meaning that the server will not
+ // use the contents of the buffer associated with that slot. The slot index
+ // returned may or may not contain a buffer. If the slot is empty the client
+ // should call requestBuffer to assign a new buffer to that slot. The client
+ // is expected to either call cancelBuffer on the dequeued slot or to fill
+ // in the contents of its associated buffer contents and call queueBuffer.
+ virtual status_t dequeueBuffer(int *slot) = 0;
+
+ // queueBuffer indicates that the client has finished filling in the
+ // contents of the buffer associated with slot and transfers ownership of
+ // that slot back to the server. It is not valid to call queueBuffer on a
+ // slot that is not owned by the client or one for which a buffer associated
+ // via requestBuffer.
+ virtual status_t queueBuffer(int slot) = 0;
+
+ // cancelBuffer indicates that the client does not wish to fill in the
+ // buffer associated with slot and transfers ownership of the slot back to
+ // the server.
+ virtual void cancelBuffer(int slot) = 0;
+
+ virtual status_t setCrop(const Rect& reg) = 0;
+ virtual status_t setTransform(uint32_t transform) = 0;
+};
+
+// ----------------------------------------------------------------------------
+
+class BnSurfaceTexture : public BnInterface<ISurfaceTexture>
+{
+public:
+ virtual status_t onTransact( uint32_t code,
+ const Parcel& data,
+ Parcel* reply,
+ uint32_t flags = 0);
+};
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+
+#endif // ANDROID_GUI_ISURFACETEXTURE_H