VR: Add VR Hardware Composer Service

cc_library_static {

  name: "libvr_hwc-binder",

  srcs: [

    "aidl/android/dvr/IVrComposer.aidl",

    "aidl/android/dvr/IVrComposerCallback.aidl",

    "aidl/android/dvr/parcelable_composer_frame.cpp",

    "aidl/android/dvr/parcelable_composer_layer.cpp",

    "aidl/android/dvr/parcelable_unique_fd.cpp",

  ],

  aidl: {

    include_dirs: ["frameworks/native/services/vr/hardware_composer/aidl"],

    export_aidl_headers: true,

  },

  export_include_dirs: ["aidl"],

  shared_libs: [

    "libbinder",

    "libui",

    "libutils",

    "libvrhwc",

  ],

}

cc_library_static {

  name: "libvr_hwc-impl",

  srcs: [

    "vr_composer.cpp",

  ],

  static_libs: [

    "libvr_hwc-binder",

  ],

  shared_libs: [

    "libbase",

    "libbinder",

    "liblog",

    "libui",

    "libutils",

    "libvrhwc",

  ],

  export_shared_lib_headers: [

    "libvrhwc",

  ],

  cflags: [

    "-DLOG_TAG=\"vr_hwc\"",

  ],

}

cc_binary {

  name: "vr_hwc",

  srcs: [

    "vr_hardware_composer_service.cpp"

  ],

  static_libs: [

    "libvr_hwc-impl",

    // NOTE: This needs to be included after the *-impl lib otherwise the

    // symbols in the *-binder library get optimized out.

    "libvr_hwc-binder",

  ],

  shared_libs: [

    "android.dvr.composer@1.0",

    "android.hardware.graphics.composer@2.1",

    "libbase",

    "libbinder",

    "liblog",

    "libhardware",

    "libhwbinder",

    "libui",

    "libutils",

    "libvrhwc",

  ],

  cflags: [

    "-DLOG_TAG=\"vr_hwc\"",

  ],

  init_rc: [

    "vr_hwc.rc",

  ],

}

cc_test {

  name: "vr_hwc_test",

  gtest: true,

  srcs: ["tests/vr_composer_test.cpp"],

  static_libs: [

    "libgtest",

    "libvr_hwc-impl",

    // NOTE: This needs to be included after the *-impl lib otherwise the

    // symbols in the *-binder library get optimized out.

    "libvr_hwc-binder",

  ],

  shared_libs: [

    "libbase",

    "libbinder",

    "liblog",

    "libui",

    "libutils",

  ],

}

package android.dvr;

import android.dvr.IVrComposerCallback;

/**

 * Service interface exposed by VR HWC exposed to system apps which allows one

 * system app to connect to get SurfaceFlinger's outputs (all displays). This

 * is active when SurfaceFlinger is in VR mode, where all 2D output is

 * redirected to VR HWC.

 *

 * @hide */

interface IVrComposer

{

  const String SERVICE_NAME = "vr_hwc";

  /**

   * Registers a callback used to receive frame notifications.

   */

  void registerObserver(in IVrComposerCallback callback);

}

package android.dvr;

import android.dvr.ParcelableComposerFrame;

import android.dvr.ParcelableUniqueFd;

/**

 * A system app will implement and register this callback with VRComposer

 * to receive the layers SurfaceFlinger presented when in VR mode.

 *

 * @hide */

interface IVrComposerCallback {

  /**

   * Called by the VR HWC service when a new frame is ready to be presented.

   *

   * @param frame The new frame VR HWC wants to present.

   * @return A fence FD used to signal when the previous frame is no longer

   * used by the client. This may be an invalid fence (-1) if the client is not

   * using the previous frame, in which case the previous frame may be re-used

   * at any point in time.

   */

  ParcelableUniqueFd onNewFrame(in ParcelableComposerFrame frame);

}

package android.dvr;

parcelable ParcelableComposerFrame cpp_header "android/dvr/parcelable_composer_frame.h";

package android.dvr;

parcelable ParcelableComposerLayer cpp_header "android/dvr/parcelable_composer_layer.h";