SurfaceFlinger: Add support for V4L2 based wfd solution.

This change add support for V4L2 based Wi-Fi display.

Change-Id: Ib3f3868eb0b7fa2bf7e58246fb2c5cd0ddceb7e1

3 files changed, 76 insertions, 16 deletions

diff --git a/services/surfaceflinger/DisplayUtils.cpp b/services/surfaceflinger/DisplayUtils.cpp
index 3937df0..e4e2183 100644
--- a/services/surfaceflinger/DisplayUtils.cpp
+++ b/services/surfaceflinger/DisplayUtils.cpp
@@ -33,8 +33,11 @@
 #include <utils/Errors.h>
 #include <utils/Log.h>
 
+#include <gui/Surface.h>
 #include <ui/GraphicBuffer.h>
 
+#include "RenderEngine/RenderEngine.h"
+#include "DisplayHardware/FramebufferSurface.h"
 #include "DisplayUtils.h"
 #include <ExSurfaceFlinger.h>
 #include <ExLayer.h>
@@ -88,19 +91,71 @@ HWComposer* DisplayUtils::getHWCInstance(
     }
 }
 
-VirtualDisplaySurface* DisplayUtils::getVDSInstance(HWComposer* hwc, int32_t hwcDisplayId,
-        sp<IGraphicBufferProducer> currentStateSurface, sp<IGraphicBufferProducer> bqProducer,
+void DisplayUtils::initVDSInstance(HWComposer* hwc, int32_t hwcDisplayId,
+        sp<IGraphicBufferProducer> currentStateSurface, sp<DisplaySurface> &dispSurface,
+        sp<IGraphicBufferProducer> &producer, sp<IGraphicBufferProducer> bqProducer,
         sp<IGraphicBufferConsumer> bqConsumer, String8 currentStateDisplayName,
-        bool currentStateIsSecure)
+        bool currentStateIsSecure, int currentStateType)
 {
     if(sUseExtendedImpls) {
-        return new ExVirtualDisplaySurface(*hwc, hwcDisplayId, currentStateSurface, bqProducer,
-                bqConsumer, currentStateDisplayName, currentStateIsSecure);
+        if(hwc->isVDSEnabled()) {
+            VirtualDisplaySurface* vds = new ExVirtualDisplaySurface(*hwc, hwcDisplayId,
+                    currentStateSurface, bqProducer, bqConsumer, currentStateDisplayName,
+                    currentStateIsSecure);
+            dispSurface = vds;
+            producer = vds;
+        } else if(!createV4L2BasedVirtualDisplay(hwc, hwcDisplayId, dispSurface, producer,
+                          currentStateSurface, bqProducer, bqConsumer, currentStateType)) {
+            VirtualDisplaySurface* vds = new VirtualDisplaySurface(*hwc, hwcDisplayId,
+                    currentStateSurface, bqProducer, bqConsumer, currentStateDisplayName);
+            dispSurface = vds;
+            producer = vds;
+        }
     } else {
-        return new VirtualDisplaySurface(*hwc, hwcDisplayId, currentStateSurface, bqProducer,
-                bqConsumer, currentStateDisplayName);
+        VirtualDisplaySurface* vds = new VirtualDisplaySurface(*hwc, hwcDisplayId,
+                currentStateSurface, bqProducer, bqConsumer, currentStateDisplayName);
+        dispSurface = vds;
+        producer = vds;
     }
 }
 
+bool DisplayUtils::createV4L2BasedVirtualDisplay(HWComposer* hwc, int32_t &hwcDisplayId,
+                   sp<DisplaySurface> &dispSurface, sp<IGraphicBufferProducer> &producer,
+                   sp<IGraphicBufferProducer> currentStateSurface,
+                   sp<IGraphicBufferProducer> bqProducer, sp<IGraphicBufferConsumer> bqConsumer,
+                   int currentStateType) {
+    char value[PROPERTY_VALUE_MAX];
+    property_get("persist.sys.wfd.virtual", value, "0");
+    int wfdVirtual = atoi(value);
+    if(wfdVirtual && hwcDisplayId > 0) {
+        //Read virtual display properties and create a
+        //rendering surface for it inorder to be handled
+        //by hwc.
+
+        sp<ANativeWindow> mNativeWindow = new Surface(currentStateSurface);
+        ANativeWindow* const window = mNativeWindow.get();
+
+        int format;
+        window->query(window, NATIVE_WINDOW_FORMAT, &format);
+        EGLSurface surface;
+        EGLint w, h;
+        EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+        // In M AOSP getEGLConfig() always returns EGL_NO_CONFIG as
+        // EGL_ANDROIDX_no_config_context active now.
+        EGLConfig config = RenderEngine::chooseEglConfig(display, format);
+
+        surface = eglCreateWindowSurface(display, config, window, NULL);
+        eglQuerySurface(display, surface, EGL_WIDTH, &w);
+        eglQuerySurface(display, surface, EGL_HEIGHT, &h);
+        if(hwc->setVirtualDisplayProperties(hwcDisplayId, w, h, format) != NO_ERROR)
+            return false;
+
+        dispSurface = new FramebufferSurface(*hwc, currentStateType, bqConsumer);
+        producer = bqProducer;
+        return true;
+    }
+    return false;
+}
+
 }; // namespace android
 
diff --git a/services/surfaceflinger/DisplayUtils.h b/services/surfaceflinger/DisplayUtils.h
index c35e36a..cdf2b67 100644
--- a/services/surfaceflinger/DisplayUtils.h
+++ b/services/surfaceflinger/DisplayUtils.h
@@ -56,14 +56,21 @@ class DisplayUtils {
                             uint32_t, uint32_t);
     HWComposer* getHWCInstance(const sp<SurfaceFlinger>& flinger,
                             HWComposer::EventHandler& handler);
-    VirtualDisplaySurface* getVDSInstance(HWComposer* hwc, int32_t hwcDisplayId,
-            sp<IGraphicBufferProducer> currentStateSurface, sp<IGraphicBufferProducer> bqProducer,
+    void initVDSInstance(HWComposer* hwc, int32_t hwcDisplayId,
+            sp<IGraphicBufferProducer> currentStateSurface, sp<DisplaySurface> &dispSurface,
+            sp<IGraphicBufferProducer> &producer, sp<IGraphicBufferProducer> bqProducer,
             sp<IGraphicBufferConsumer> bqConsumer, String8 currentStateDisplayName,
-            bool currentStateIsSecure);
+            bool currentStateIsSecure, int currentStateType);
     DisplayUtils();
   private:
     static DisplayUtils* sDisplayUtils;
     static bool sUseExtendedImpls;
+
+    bool createV4L2BasedVirtualDisplay(HWComposer* hwc, int32_t &hwcDisplayId,
+                   sp<DisplaySurface> &dispSurface, sp<IGraphicBufferProducer> &producer,
+                   sp<IGraphicBufferProducer> currentStateSurface,
+                   sp<IGraphicBufferProducer> bqProducer,
+                   sp<IGraphicBufferConsumer> bqConsumer, int currentStateType);
 };
 
 }; // namespace android
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index d7cf130..3b4330d 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -1445,12 +1445,10 @@ void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
                                 hwcDisplayId = allocateHwcDisplayId(state.type);
                             }
 
-                            sp<VirtualDisplaySurface> vds = DisplayUtils::getInstance()->getVDSInstance(
-                                    mHwc, hwcDisplayId, state.surface,
-                                    bqProducer, bqConsumer, state.displayName, state.isSecure);
+                            DisplayUtils::getInstance()->initVDSInstance(mHwc, hwcDisplayId,
+                                    state.surface, dispSurface, producer, bqProducer, bqConsumer,
+                                    state.displayName, state.isSecure, state.type);
 
-                            dispSurface = vds;
-                            producer = vds;
                         }
                     } else {
                         ALOGE_IF(state.surface!=NULL,
@@ -1466,7 +1464,7 @@ void SurfaceFlinger::handleTransactionLocked(uint32_t transactionFlags)
                     }
 
                     const wp<IBinder>& display(curr.keyAt(i));
-                    if (dispSurface != NULL) {
+                    if (dispSurface != NULL && producer != NULL) {
                         sp<DisplayDevice> hw = new DisplayDevice(this,
                                 state.type, hwcDisplayId,
                                 mHwc->getFormat(hwcDisplayId), state.isSecure,