Initial Android Auto External View Systems drivers
Add support for EVS system camera and display drivers.
These build and run but still contain significant placeholder code and
TODO items.
Bug: 32095143
Test: run against evs_test (submitted in future change set)
Change-Id: I9187e888f03248e5cd43293253dc76a71184c02d
diff --git a/evs/1.0/default/EvsEnumerator.cpp b/evs/1.0/default/EvsEnumerator.cpp
new file mode 100644
index 0000000..9f38041
--- /dev/null
+++ b/evs/1.0/default/EvsEnumerator.cpp
@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2016 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.evs@1.0-service"
+
+#include "EvsEnumerator.h"
+#include "EvsCamera.h"
+#include "EvsDisplay.h"
+
+namespace android {
+namespace hardware {
+namespace evs {
+namespace V1_0 {
+namespace implementation {
+
+
+EvsEnumerator::EvsEnumerator() {
+ ALOGD("EvsEnumerator created");
+
+ // Add sample camera data to our list of cameras
+ // NOTE: The id strings trigger special initialization inside the EvsCamera constructor
+ mCameraList.emplace_back( new EvsCamera(EvsCamera::kCameraName_Backup), false );
+ mCameraList.emplace_back( new EvsCamera("LaneView"), false );
+ mCameraList.emplace_back( new EvsCamera(EvsCamera::kCameraName_RightTurn), false );
+}
+
+// Methods from ::android::hardware::evs::V1_0::IEvsEnumerator follow.
+Return<void> EvsEnumerator::getCameraList(getCameraList_cb _hidl_cb) {
+ ALOGD("getCameraList");
+
+ const unsigned numCameras = mCameraList.size();
+
+ // Build up a packed array of CameraDesc for return
+ // NOTE: Only has to live until the callback returns
+ std::vector<CameraDesc> descriptions;
+ descriptions.reserve(numCameras);
+ for (const auto& cam : mCameraList) {
+ descriptions.push_back( cam.pCamera->getDesc() );
+ }
+
+ // Encapsulate our camera descriptions in the HIDL vec type
+ hidl_vec<CameraDesc> 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<void> EvsEnumerator::openCamera(const hidl_string& cameraId,
+ openCamera_cb callback) {
+ ALOGD("openCamera");
+
+ // Find the named camera
+ CameraRecord *pRecord = nullptr;
+ for (auto &&cam : mCameraList) {
+ if (cam.pCamera->getDesc().cameraId == cameraId) {
+ // Found a match!
+ pRecord = &cam;
+ break;
+ }
+ }
+
+ if (!pRecord) {
+ ALOGE("Requested camera %s not found", cameraId.c_str());
+ callback(nullptr);
+ }
+ else if (pRecord->inUse) {
+ ALOGE("Cannot open camera %s which is already in use", cameraId.c_str());
+ callback(nullptr);
+ }
+ else {
+ /* TODO(b/33492405): Do this, When HIDL can give us back a recognizable pointer
+ pRecord->inUse = true;
+ */
+ callback(pRecord->pCamera);
+ }
+
+ return Void();
+}
+
+Return<void> EvsEnumerator::closeCamera(const ::android::sp<IEvsCamera>& camera) {
+ ALOGD("closeCamera");
+
+ if (camera == nullptr) {
+ ALOGE("Ignoring call to closeCamera with null camera pointer");
+ }
+ else {
+ // Make sure the camera has stopped streaming
+ camera->stopVideoStream();
+
+ /* TODO(b/33492405): Do this, When HIDL can give us back a recognizable pointer
+ pRecord->inUse = false;
+ */
+ }
+
+ return Void();
+}
+
+Return<void> EvsEnumerator::openDisplay(openDisplay_cb callback) {
+ ALOGD("openDisplay");
+
+ // If we already have a display active, then this request must be denied
+ if (mActiveDisplay != nullptr) {
+ ALOGW("Rejecting openDisplay request the display is already in use.");
+ callback(nullptr);
+ }
+ else {
+ // Create a new display interface and return it
+ mActiveDisplay = new EvsDisplay();
+ ALOGD("Returning new EvsDisplay object %p", mActiveDisplay.get());
+ callback(mActiveDisplay);
+ }
+
+ return Void();
+}
+
+Return<void> EvsEnumerator::closeDisplay(const ::android::sp<IEvsDisplay>& display) {
+ ALOGD("closeDisplay");
+
+ if (mActiveDisplay == nullptr) {
+ ALOGE("Ignoring closeDisplay when display is not active");
+ }
+ else if (display == nullptr) {
+ ALOGE("Ignoring closeDisplay with null display pointer");
+ }
+ else {
+ // Drop the active display
+ // TODO(b/33492405): When HIDL provides recognizable pointers, add validation here.
+ mActiveDisplay = nullptr;
+ }
+
+ return Void();
+}
+
+
+// TODO(b/31632518): Need to get notification when our client dies so we can close the camera.
+// As possible work around would be to give the client a HIDL object to exclusively hold
+// and use it's destructor to perform some work in the server side.
+
+
+} // namespace implementation
+} // namespace V1_0
+} // namespace evs
+} // namespace hardware
+} // namespace android