blob: d93f3709455b524aab72b7f987bea19360824b01 [file] [log] [blame]
#include "vr_composer.h"
#include <binder/IPCThreadState.h>
#include <binder/PermissionCache.h>
namespace android {
namespace dvr {
namespace {
bool CheckPermission() {
const android::IPCThreadState* ipc = android::IPCThreadState::self();
const pid_t pid = ipc->getCallingPid();
const uid_t uid = ipc->getCallingUid();
const bool permission = PermissionCache::checkPermission(
String16("android.permission.RESTRICTED_VR_ACCESS"), pid, uid);
if (!permission)
ALOGE("permission denied to pid=%d uid=%u", pid, uid);
return permission;
} // namespace
VrComposer::VrComposer(ComposerView* composer_view)
: composer_view_(composer_view) {
VrComposer::~VrComposer() {
binder::Status VrComposer::registerObserver(
const sp<IVrComposerCallback>& callback) {
std::lock_guard<std::mutex> guard(mutex_);
if (!CheckPermission())
return binder::Status::fromStatusT(PERMISSION_DENIED);
if (callback_.get()) {
ALOGE("Failed to register callback, already registered");
return binder::Status::fromStatusT(ALREADY_EXISTS);
callback_ = callback;
// Don't take the lock to force display refresh otherwise it could end in a
// deadlock since HWC calls this with new frames and it has a lock of its own
// to serialize access to the display information.
return binder::Status::ok();
binder::Status VrComposer::clearObserver() {
std::lock_guard<std::mutex> guard(mutex_);
callback_ = nullptr;
return binder::Status::ok();
base::unique_fd VrComposer::OnNewFrame(const ComposerView::Frame& frame) {
std::lock_guard<std::mutex> guard(mutex_);
if (!callback_.get())
return base::unique_fd();
ParcelableComposerFrame parcelable_frame(frame);
ParcelableUniqueFd fence;
binder::Status ret = callback_->onNewFrame(parcelable_frame, &fence);
if (!ret.isOk())
ALOGE("Failed to send new frame: %s", ret.toString8().string());
return fence.fence();
void VrComposer::binderDied(const wp<IBinder>& /* who */) {
std::lock_guard<std::mutex> guard(mutex_);
callback_ = nullptr;
} // namespace dvr
} // namespace android