hwc: Common Display HAL to support VDS & V4L2 WFD solutions
1. Define classes for VDS and V4L2 based WFD solutions.
2. Overload the functionalities for VDS and V4L2 WFD solutions.
3. Instantiate VDS object or V4L2 object during hwc init based on the
property persist.hwc.enable_vds set by the user.
4. VDS solution is not verified as it requires some dependent changes.
Change-Id: I74bf944d532da138c850d4ec0c20b4a881489efa
diff --git a/libhwcomposer/hwc_virtual.h b/libhwcomposer/hwc_virtual.h
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+++ b/libhwcomposer/hwc_virtual.h
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+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ * Copyright (C) 2012-2014, The Linux Foundation. All rights reserved.
+ *
+ * Not a Contribution, Apache license notifications and license are retained
+ * for attribution purposes only.
+ *
+ * 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 HWC_VIRTUAL
+#define HWC_VIRTUAL
+
+#include <hwc_utils.h>
+
+namespace qhwc {
+namespace ovutils = overlay::utils;
+
+// Base and abstract class for VDS and V4L2 wfd design.
+class HWCVirtualBase {
+public:
+ explicit HWCVirtualBase(){};
+ virtual ~HWCVirtualBase(){};
+ // instantiates and returns the pointer to VDS or V4L2 object.
+ static HWCVirtualBase* getObject();
+ virtual int prepare(hwc_composer_device_1 *dev,
+ hwc_display_contents_1_t* list) = 0;
+ virtual int set(hwc_context_t *ctx, hwc_display_contents_1_t *list) = 0;
+ virtual void init(hwc_context_t *ctx) = 0;
+ virtual void destroy(hwc_context_t *ctx, size_t numDisplays,
+ hwc_display_contents_1_t** displays) = 0;
+};
+
+class HWCVirtualVDS : public HWCVirtualBase {
+public:
+ explicit HWCVirtualVDS(){};
+ virtual ~HWCVirtualVDS(){};
+ // Chooses composition type and configures pipe for each layer in virtual
+ // display list
+ virtual int prepare(hwc_composer_device_1 *dev,
+ hwc_display_contents_1_t* list);
+ // Queues the buffer for each layer in virtual display list and call display
+ // commit.
+ virtual int set(hwc_context_t *ctx, hwc_display_contents_1_t *list);
+ // instantiates mdpcomp, copybit and fbupdate objects and initialize those
+ // objects for virtual display during virtual display connect.
+ virtual void init(hwc_context_t *ctx);
+ // Destroys mdpcomp, copybit and fbupdate objects and for virtual display
+ // during virtual display disconnect.
+ virtual void destroy(hwc_context_t *ctx, size_t numDisplays,
+ hwc_display_contents_1_t** displays);
+};
+
+class HWCVirtualV4L2 : public HWCVirtualBase {
+public:
+ explicit HWCVirtualV4L2(){};
+ virtual ~HWCVirtualV4L2(){};
+ // Chooses composition type and configures pipe for each layer in virtual
+ // display list
+ virtual int prepare(hwc_composer_device_1 *dev,
+ hwc_display_contents_1_t* list);
+ // Queues the buffer for each layer in virtual display list and call
+ // display commit.
+ virtual int set(hwc_context_t *ctx, hwc_display_contents_1_t *list);
+ // instantiates mdpcomp, copybit and fbupdate objects and initialize those
+ // objects for virtual display during virtual display connect. This function
+ // is no-op for V4L2 design
+ virtual void init(hwc_context_t *ctx) {};
+ // Destroys mdpcomp, copybit and fbupdate objects and for virtual display
+ // during virtual display disconnect. This function is no-op for V4L2 design
+ virtual void destroy(hwc_context_t *ctx, size_t numDisplays,
+ hwc_display_contents_1_t** displays){};
+};
+
+}; //namespace
+#endif