Add EVS v1.1 interface
Extends existing v1.0 interfaces to support more functionalities and
adds corresponding test cases.
Bug: 135472573
Test: VTS
Change-Id: I5245238e6a18ddc2c0451aaa21a9cce55c6207eb
Signed-off-by: Changyeon Jo <changyeon@google.com>
diff --git a/automotive/evs/1.1/default/EvsEnumerator.cpp b/automotive/evs/1.1/default/EvsEnumerator.cpp
new file mode 100644
index 0000000..b324907
--- /dev/null
+++ b/automotive/evs/1.1/default/EvsEnumerator.cpp
@@ -0,0 +1,217 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#define LOG_TAG "android.hardware.automotive.evs@1.1-service"
+
+#include "EvsEnumerator.h"
+#include "EvsCamera.h"
+#include "EvsDisplay.h"
+
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace evs {
+namespace V1_1 {
+namespace implementation {
+
+
+// NOTE: All members values are static so that all clients operate on the same state
+// That is to say, this is effectively a singleton despite the fact that HIDL
+// constructs a new instance for each client.
+std::list<EvsEnumerator::CameraRecord> EvsEnumerator::sCameraList;
+wp<EvsDisplay> EvsEnumerator::sActiveDisplay;
+
+
+EvsEnumerator::EvsEnumerator() {
+ ALOGD("EvsEnumerator created");
+
+ // Add sample camera data to our list of cameras
+ // In a real driver, this would be expected to can the available hardware
+ sCameraList.emplace_back(EvsCamera::kCameraName_Backup);
+ sCameraList.emplace_back("LaneView");
+ sCameraList.emplace_back("right turn");
+}
+
+
+// Methods from ::android::hardware::automotive::evs::V1_0::IEvsEnumerator follow.
+Return<void> EvsEnumerator::getCameraList(getCameraList_cb _hidl_cb) {
+ ALOGD("getCameraList");
+
+ const unsigned numCameras = sCameraList.size();
+
+ // Build up a packed array of CameraDesc for return
+ // NOTE: Only has to live until the callback returns
+ std::vector<CameraDesc_1_0> descriptions;
+ descriptions.reserve(numCameras);
+ for (const auto& cam : sCameraList) {
+ descriptions.push_back( cam.desc );
+ }
+
+ // Encapsulate our camera descriptions in the HIDL vec type
+ hidl_vec<CameraDesc_1_0> hidlCameras(descriptions);
+
+ // Send back the results
+ ALOGD("reporting %zu cameras available", hidlCameras.size());
+ _hidl_cb(hidlCameras);
+
+ // HIDL convention says we return Void if we sent our result back via callback
+ return Void();
+}
+
+
+Return<sp<IEvsCamera_1_0>> EvsEnumerator::openCamera(const hidl_string& cameraId) {
+ ALOGD("openCamera");
+
+ // Find the named camera
+ CameraRecord *pRecord = nullptr;
+ for (auto &&cam : sCameraList) {
+ if (cam.desc.cameraId == cameraId) {
+ // Found a match!
+ pRecord = &cam;
+ break;
+ }
+ }
+
+ // Is this a recognized camera id?
+ if (!pRecord) {
+ ALOGE("Requested camera %s not found", cameraId.c_str());
+ return nullptr;
+ }
+
+ // Has this camera already been instantiated by another caller?
+ sp<EvsCamera> pActiveCamera = pRecord->activeInstance.promote();
+ if (pActiveCamera != nullptr) {
+ ALOGW("Killing previous camera because of new caller");
+ closeCamera(pActiveCamera);
+ }
+
+ // Construct a camera instance for the caller
+ pActiveCamera = new EvsCamera(cameraId.c_str());
+ pRecord->activeInstance = pActiveCamera;
+ if (pActiveCamera == nullptr) {
+ ALOGE("Failed to allocate new EvsCamera object for %s\n", cameraId.c_str());
+ }
+
+ return pActiveCamera;
+}
+
+
+Return<void> EvsEnumerator::closeCamera(const ::android::sp<IEvsCamera_1_0>& pCamera) {
+ ALOGD("closeCamera");
+
+ auto pCamera_1_1 = IEvsCamera_1_1::castFrom(pCamera).withDefault(nullptr);
+ if (pCamera_1_1 == nullptr) {
+ ALOGE("Ignoring call to closeCamera with null camera ptr");
+ return Void();
+ }
+
+ // Get the camera id so we can find it in our list
+ std::string cameraId;
+ pCamera_1_1->getCameraInfo([&cameraId](CameraDesc desc) {
+ cameraId = desc.cameraId;
+ }
+ );
+
+ // Find the named camera
+ CameraRecord *pRecord = nullptr;
+ for (auto &&cam : sCameraList) {
+ if (cam.desc.cameraId == cameraId) {
+ // Found a match!
+ pRecord = &cam;
+ break;
+ }
+ }
+
+ // Is the display being destroyed actually the one we think is active?
+ if (!pRecord) {
+ ALOGE("Asked to close a camera who's name isn't recognized");
+ } else {
+ sp<EvsCamera> pActiveCamera = pRecord->activeInstance.promote();
+
+ if (pActiveCamera == nullptr) {
+ ALOGE("Somehow a camera is being destroyed when the enumerator didn't know one existed");
+ } else if (pActiveCamera != pCamera_1_1) {
+ // This can happen if the camera was aggressively reopened, orphaning this previous instance
+ ALOGW("Ignoring close of previously orphaned camera - why did a client steal?");
+ } else {
+ // Drop the active camera
+ pActiveCamera->forceShutdown();
+ pRecord->activeInstance = nullptr;
+ }
+ }
+
+ return Void();
+}
+
+
+Return<sp<IEvsDisplay>> EvsEnumerator::openDisplay() {
+ ALOGD("openDisplay");
+
+ // If we already have a display active, then we need to shut it down so we can
+ // give exclusive access to the new caller.
+ sp<EvsDisplay> pActiveDisplay = sActiveDisplay.promote();
+ if (pActiveDisplay != nullptr) {
+ ALOGW("Killing previous display because of new caller");
+ closeDisplay(pActiveDisplay);
+ }
+
+ // Create a new display interface and return it
+ pActiveDisplay = new EvsDisplay();
+ sActiveDisplay = pActiveDisplay;
+
+ ALOGD("Returning new EvsDisplay object %p", pActiveDisplay.get());
+ return pActiveDisplay;
+}
+
+
+Return<void> EvsEnumerator::closeDisplay(const ::android::sp<IEvsDisplay>& pDisplay) {
+ ALOGD("closeDisplay");
+
+ // Do we still have a display object we think should be active?
+ sp<EvsDisplay> pActiveDisplay = sActiveDisplay.promote();
+ if (pActiveDisplay == nullptr) {
+ ALOGE("Somehow a display is being destroyed when the enumerator didn't know one existed");
+ } else if (sActiveDisplay != pDisplay) {
+ ALOGW("Ignoring close of previously orphaned display - why did a client steal?");
+ } else {
+ // Drop the active display
+ pActiveDisplay->forceShutdown();
+ sActiveDisplay = nullptr;
+ }
+
+ return Void();
+}
+
+
+Return<DisplayState> EvsEnumerator::getDisplayState() {
+ ALOGD("getDisplayState");
+
+ // Do we still have a display object we think should be active?
+ sp<IEvsDisplay> pActiveDisplay = sActiveDisplay.promote();
+ if (pActiveDisplay != nullptr) {
+ return pActiveDisplay->getDisplayState();
+ } else {
+ return DisplayState::NOT_OPEN;
+ }
+}
+
+
+} // namespace implementation
+} // namespace V1_1
+} // namespace evs
+} // namespace automotive
+} // namespace hardware
+} // namespace android