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/Android.bp b/automotive/evs/1.1/default/Android.bp
new file mode 100644
index 0000000..411f0ff
--- /dev/null
+++ b/automotive/evs/1.1/default/Android.bp
@@ -0,0 +1,32 @@
+cc_binary {
+ name: "android.hardware.automotive.evs@1.1-service",
+ defaults: ["hidl_defaults"],
+ proprietary: true,
+ relative_install_path: "hw",
+ srcs: [
+ "service.cpp",
+ "EvsCamera.cpp",
+ "EvsEnumerator.cpp",
+ "EvsDisplay.cpp"
+ ],
+ init_rc: ["android.hardware.automotive.evs@1.1-service.rc"],
+
+ shared_libs: [
+ "android.hardware.automotive.evs@1.0",
+ "android.hardware.automotive.evs@1.1",
+ "libbase",
+ "libbinder",
+ "libcutils",
+ "libhardware",
+ "libhidlbase",
+ "libhidltransport",
+ "liblog",
+ "libui",
+ "libutils",
+ ],
+
+ cflags: [
+ "-O0",
+ "-g",
+ ],
+}
diff --git a/automotive/evs/1.1/default/EvsCamera.cpp b/automotive/evs/1.1/default/EvsCamera.cpp
new file mode 100644
index 0000000..62d9826
--- /dev/null
+++ b/automotive/evs/1.1/default/EvsCamera.cpp
@@ -0,0 +1,584 @@
+/*
+ * 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 "EvsCamera.h"
+#include "EvsEnumerator.h"
+
+#include <ui/GraphicBufferAllocator.h>
+#include <ui/GraphicBufferMapper.h>
+
+
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace evs {
+namespace V1_1 {
+namespace implementation {
+
+
+// Special camera names for which we'll initialize alternate test data
+const char EvsCamera::kCameraName_Backup[] = "backup";
+
+
+// Arbitrary limit on number of graphics buffers allowed to be allocated
+// Safeguards against unreasonable resource consumption and provides a testable limit
+const unsigned MAX_BUFFERS_IN_FLIGHT = 100;
+
+
+EvsCamera::EvsCamera(const char *id) :
+ mFramesAllowed(0),
+ mFramesInUse(0),
+ mStreamState(STOPPED) {
+
+ ALOGD("EvsCamera instantiated");
+
+ mDescription.cameraId = id;
+
+ // Set up dummy data for testing
+ if (mDescription.cameraId == kCameraName_Backup) {
+ mWidth = 640; // full NTSC/VGA
+ mHeight = 480; // full NTSC/VGA
+ mDescription.vendorFlags = 0xFFFFFFFF; // Arbitrary value
+ } else {
+ mWidth = 320; // 1/2 NTSC/VGA
+ mHeight = 240; // 1/2 NTSC/VGA
+ }
+
+ mFormat = HAL_PIXEL_FORMAT_RGBA_8888;
+ mUsage = GRALLOC_USAGE_HW_TEXTURE | GRALLOC_USAGE_HW_CAMERA_WRITE |
+ GRALLOC_USAGE_SW_READ_RARELY | GRALLOC_USAGE_SW_WRITE_RARELY;
+}
+
+
+EvsCamera::~EvsCamera() {
+ ALOGD("EvsCamera being destroyed");
+ forceShutdown();
+}
+
+
+//
+// This gets called if another caller "steals" ownership of the camera
+//
+void EvsCamera::forceShutdown()
+{
+ ALOGD("EvsCamera forceShutdown");
+
+ // Make sure our output stream is cleaned up
+ // (It really should be already)
+ stopVideoStream();
+
+ // Claim the lock while we work on internal state
+ std::lock_guard <std::mutex> lock(mAccessLock);
+
+ // Drop all the graphics buffers we've been using
+ if (mBuffers.size() > 0) {
+ GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
+ for (auto&& rec : mBuffers) {
+ if (rec.inUse) {
+ ALOGE("Error - releasing buffer despite remote ownership");
+ }
+ alloc.free(rec.handle);
+ rec.handle = nullptr;
+ }
+ mBuffers.clear();
+ }
+
+ // Put this object into an unrecoverable error state since somebody else
+ // is going to own the underlying camera now
+ mStreamState = DEAD;
+}
+
+
+// Methods from ::android::hardware::automotive::evs::V1_0::IEvsCamera follow.
+Return<void> EvsCamera::getCameraInfo(getCameraInfo_cb _hidl_cb) {
+ ALOGD("getCameraInfo");
+
+ // Send back our self description
+ _hidl_cb(mDescription);
+ return Void();
+}
+
+
+Return<EvsResult> EvsCamera::setMaxFramesInFlight(uint32_t bufferCount) {
+ ALOGD("setMaxFramesInFlight");
+ std::lock_guard<std::mutex> lock(mAccessLock);
+
+ // If we've been displaced by another owner of the camera, then we can't do anything else
+ if (mStreamState == DEAD) {
+ ALOGE("ignoring setMaxFramesInFlight call when camera has been lost.");
+ return EvsResult::OWNERSHIP_LOST;
+ }
+
+ // We cannot function without at least one video buffer to send data
+ if (bufferCount < 1) {
+ ALOGE("Ignoring setMaxFramesInFlight with less than one buffer requested");
+ return EvsResult::INVALID_ARG;
+ }
+
+ // Update our internal state
+ if (setAvailableFrames_Locked(bufferCount)) {
+ return EvsResult::OK;
+ } else {
+ return EvsResult::BUFFER_NOT_AVAILABLE;
+ }
+}
+
+
+Return<EvsResult> EvsCamera::startVideoStream(const ::android::sp<IEvsCameraStream_1_0>& stream) {
+ ALOGD("startVideoStream");
+ std::lock_guard<std::mutex> lock(mAccessLock);
+
+ // If we've been displaced by another owner of the camera, then we can't do anything else
+ if (mStreamState == DEAD) {
+ ALOGE("ignoring startVideoStream call when camera has been lost.");
+ return EvsResult::OWNERSHIP_LOST;
+ }
+ if (mStreamState != STOPPED) {
+ ALOGE("ignoring startVideoStream call when a stream is already running.");
+ return EvsResult::STREAM_ALREADY_RUNNING;
+ }
+
+ // If the client never indicated otherwise, configure ourselves for a single streaming buffer
+ if (mFramesAllowed < 1) {
+ if (!setAvailableFrames_Locked(1)) {
+ ALOGE("Failed to start stream because we couldn't get a graphics buffer");
+ return EvsResult::BUFFER_NOT_AVAILABLE;
+ }
+ }
+
+ // Record the user's callback for use when we have a frame ready
+ mStream = IEvsCameraStream_1_1::castFrom(stream).withDefault(nullptr);
+ if (mStream == nullptr) {
+ ALOGE("Default implementation does not support v1.0 IEvsCameraStream");
+ return EvsResult::INVALID_ARG;
+ }
+
+ // Start the frame generation thread
+ mStreamState = RUNNING;
+ mCaptureThread = std::thread([this](){ generateFrames(); });
+
+ return EvsResult::OK;
+}
+
+
+Return<void> EvsCamera::doneWithFrame(const BufferDesc_1_0& buffer) {
+ std::lock_guard <std::mutex> lock(mAccessLock);
+ returnBuffer(buffer.bufferId, buffer.memHandle);
+
+ return Void();
+}
+
+
+Return<void> EvsCamera::stopVideoStream() {
+ ALOGD("stopVideoStream");
+ std::unique_lock <std::mutex> lock(mAccessLock);
+
+ if (mStreamState == RUNNING) {
+ // Tell the GenerateFrames loop we want it to stop
+ mStreamState = STOPPING;
+
+ // Block outside the mutex until the "stop" flag has been acknowledged
+ // We won't send any more frames, but the client might still get some already in flight
+ ALOGD("Waiting for stream thread to end..");
+ lock.unlock();
+ mCaptureThread.join();
+ lock.lock();
+
+ mStreamState = STOPPED;
+ mStream = nullptr;
+ ALOGD("Stream marked STOPPED.");
+ }
+
+ return Void();
+}
+
+
+Return<int32_t> EvsCamera::getExtendedInfo(uint32_t opaqueIdentifier) {
+ ALOGD("getExtendedInfo");
+ std::lock_guard<std::mutex> lock(mAccessLock);
+
+ // For any single digit value, return the index itself as a test value
+ if (opaqueIdentifier <= 9) {
+ return opaqueIdentifier;
+ }
+
+ // Return zero by default as required by the spec
+ return 0;
+}
+
+
+Return<EvsResult> EvsCamera::setExtendedInfo(uint32_t /*opaqueIdentifier*/, int32_t /*opaqueValue*/) {
+ ALOGD("setExtendedInfo");
+ std::lock_guard<std::mutex> lock(mAccessLock);
+
+ // If we've been displaced by another owner of the camera, then we can't do anything else
+ if (mStreamState == DEAD) {
+ ALOGE("ignoring setExtendedInfo call when camera has been lost.");
+ return EvsResult::OWNERSHIP_LOST;
+ }
+
+ // We don't store any device specific information in this implementation
+ return EvsResult::INVALID_ARG;
+}
+
+
+// Methods from ::android::hardware::automotive::evs::V1_1::IEvsCamera follow.
+Return<EvsResult> EvsCamera::doneWithFrame_1_1(const BufferDesc_1_1& bufDesc) {
+ std::lock_guard <std::mutex> lock(mAccessLock);
+ returnBuffer(bufDesc.bufferId, bufDesc.buffer.nativeHandle);
+
+ return EvsResult::OK;
+}
+
+
+Return<EvsResult> EvsCamera::pauseVideoStream() {
+ // Default implementation does not support this.
+ return EvsResult::UNDERLYING_SERVICE_ERROR;
+}
+
+
+Return<EvsResult> EvsCamera::resumeVideoStream() {
+ // Default implementation does not support this.
+ return EvsResult::UNDERLYING_SERVICE_ERROR;
+}
+
+
+bool EvsCamera::setAvailableFrames_Locked(unsigned bufferCount) {
+ if (bufferCount < 1) {
+ ALOGE("Ignoring request to set buffer count to zero");
+ return false;
+ }
+ if (bufferCount > MAX_BUFFERS_IN_FLIGHT) {
+ ALOGE("Rejecting buffer request in excess of internal limit");
+ return false;
+ }
+
+ // Is an increase required?
+ if (mFramesAllowed < bufferCount) {
+ // An increase is required
+ unsigned needed = bufferCount - mFramesAllowed;
+ ALOGI("Allocating %d buffers for camera frames", needed);
+
+ unsigned added = increaseAvailableFrames_Locked(needed);
+ if (added != needed) {
+ // If we didn't add all the frames we needed, then roll back to the previous state
+ ALOGE("Rolling back to previous frame queue size");
+ decreaseAvailableFrames_Locked(added);
+ return false;
+ }
+ } else if (mFramesAllowed > bufferCount) {
+ // A decrease is required
+ unsigned framesToRelease = mFramesAllowed - bufferCount;
+ ALOGI("Returning %d camera frame buffers", framesToRelease);
+
+ unsigned released = decreaseAvailableFrames_Locked(framesToRelease);
+ if (released != framesToRelease) {
+ // This shouldn't happen with a properly behaving client because the client
+ // should only make this call after returning sufficient outstanding buffers
+ // to allow a clean resize.
+ ALOGE("Buffer queue shrink failed -- too many buffers currently in use?");
+ }
+ }
+
+ return true;
+}
+
+
+unsigned EvsCamera::increaseAvailableFrames_Locked(unsigned numToAdd) {
+ // Acquire the graphics buffer allocator
+ GraphicBufferAllocator &alloc(GraphicBufferAllocator::get());
+
+ unsigned added = 0;
+
+ while (added < numToAdd) {
+ buffer_handle_t memHandle = nullptr;
+ status_t result = alloc.allocate(mWidth, mHeight, mFormat, 1, mUsage,
+ &memHandle, &mStride, 0, "EvsCamera");
+ if (result != NO_ERROR) {
+ ALOGE("Error %d allocating %d x %d graphics buffer", result, mWidth, mHeight);
+ break;
+ }
+ if (!memHandle) {
+ ALOGE("We didn't get a buffer handle back from the allocator");
+ break;
+ }
+
+ // Find a place to store the new buffer
+ bool stored = false;
+ for (auto&& rec : mBuffers) {
+ if (rec.handle == nullptr) {
+ // Use this existing entry
+ rec.handle = memHandle;
+ rec.inUse = false;
+ stored = true;
+ break;
+ }
+ }
+ if (!stored) {
+ // Add a BufferRecord wrapping this handle to our set of available buffers
+ mBuffers.emplace_back(memHandle);
+ }
+
+ mFramesAllowed++;
+ added++;
+ }
+
+ return added;
+}
+
+
+unsigned EvsCamera::decreaseAvailableFrames_Locked(unsigned numToRemove) {
+ // Acquire the graphics buffer allocator
+ GraphicBufferAllocator &alloc(GraphicBufferAllocator::get());
+
+ unsigned removed = 0;
+
+ for (auto&& rec : mBuffers) {
+ // Is this record not in use, but holding a buffer that we can free?
+ if ((rec.inUse == false) && (rec.handle != nullptr)) {
+ // Release buffer and update the record so we can recognize it as "empty"
+ alloc.free(rec.handle);
+ rec.handle = nullptr;
+
+ mFramesAllowed--;
+ removed++;
+
+ if (removed == numToRemove) {
+ break;
+ }
+ }
+ }
+
+ return removed;
+}
+
+
+// This is the asynchronous frame generation thread that runs in parallel with the
+// main serving thread. There is one for each active camera instance.
+void EvsCamera::generateFrames() {
+ ALOGD("Frame generation loop started");
+
+ unsigned idx;
+
+ while (true) {
+ bool timeForFrame = false;
+ nsecs_t startTime = systemTime(SYSTEM_TIME_MONOTONIC);
+
+ // Lock scope for updating shared state
+ {
+ std::lock_guard<std::mutex> lock(mAccessLock);
+
+ if (mStreamState != RUNNING) {
+ // Break out of our main thread loop
+ break;
+ }
+
+ // Are we allowed to issue another buffer?
+ if (mFramesInUse >= mFramesAllowed) {
+ // Can't do anything right now -- skip this frame
+ ALOGW("Skipped a frame because too many are in flight\n");
+ } else {
+ // Identify an available buffer to fill
+ for (idx = 0; idx < mBuffers.size(); idx++) {
+ if (!mBuffers[idx].inUse) {
+ if (mBuffers[idx].handle != nullptr) {
+ // Found an available record, so stop looking
+ break;
+ }
+ }
+ }
+ if (idx >= mBuffers.size()) {
+ // This shouldn't happen since we already checked mFramesInUse vs mFramesAllowed
+ ALOGE("Failed to find an available buffer slot\n");
+ } else {
+ // We're going to make the frame busy
+ mBuffers[idx].inUse = true;
+ mFramesInUse++;
+ timeForFrame = true;
+ }
+ }
+ }
+
+ if (timeForFrame) {
+ // Assemble the buffer description we'll transmit below
+ BufferDesc_1_1 newBuffer = {};
+ AHardwareBuffer_Desc* pDesc =
+ reinterpret_cast<AHardwareBuffer_Desc *>(&newBuffer.buffer.description);
+ pDesc->width = mWidth;
+ pDesc->height = mHeight;
+ pDesc->layers = 1;
+ pDesc->format = mFormat;
+ pDesc->usage = mUsage;
+ pDesc->stride = mStride;
+ newBuffer.buffer.nativeHandle = mBuffers[idx].handle;
+ newBuffer.pixelSize = sizeof(uint32_t);
+ newBuffer.bufferId = idx;
+
+ // Write test data into the image buffer
+ fillTestFrame(newBuffer);
+
+ // Issue the (asynchronous) callback to the client -- can't be holding the lock
+ EvsEvent event;
+ event.buffer(newBuffer);
+ auto result = mStream->notifyEvent(event);
+ if (result.isOk()) {
+ ALOGD("Delivered %p as id %d",
+ newBuffer.buffer.nativeHandle.getNativeHandle(), newBuffer.bufferId);
+ } else {
+ // This can happen if the client dies and is likely unrecoverable.
+ // To avoid consuming resources generating failing calls, we stop sending
+ // frames. Note, however, that the stream remains in the "STREAMING" state
+ // until cleaned up on the main thread.
+ ALOGE("Frame delivery call failed in the transport layer.");
+
+ // Since we didn't actually deliver it, mark the frame as available
+ std::lock_guard<std::mutex> lock(mAccessLock);
+ mBuffers[idx].inUse = false;
+ mFramesInUse--;
+
+ break;
+ }
+ }
+
+ // We arbitrarily choose to generate frames at 12 fps to ensure we pass the 10fps test requirement
+ static const int kTargetFrameRate = 12;
+ static const nsecs_t kTargetFrameTimeUs = 1000*1000 / kTargetFrameRate;
+ const nsecs_t now = systemTime(SYSTEM_TIME_MONOTONIC);
+ const nsecs_t workTimeUs = (now - startTime) / 1000;
+ const nsecs_t sleepDurationUs = kTargetFrameTimeUs - workTimeUs;
+ if (sleepDurationUs > 0) {
+ usleep(sleepDurationUs);
+ }
+ }
+
+ // If we've been asked to stop, send an event to signal the actual end of stream
+ EvsEvent event;
+ event.info(EvsEventType::STREAM_STOPPED);
+ auto result = mStream->notifyEvent(event);
+ if (!result.isOk()) {
+ ALOGE("Error delivering end of stream marker");
+ }
+
+ return;
+}
+
+
+void EvsCamera::fillTestFrame(const BufferDesc_1_1& buff) {
+ // Lock our output buffer for writing
+ uint32_t *pixels = nullptr;
+ const AHardwareBuffer_Desc* pDesc =
+ reinterpret_cast<const AHardwareBuffer_Desc *>(&buff.buffer.description);
+ GraphicBufferMapper &mapper = GraphicBufferMapper::get();
+ mapper.lock(buff.buffer.nativeHandle,
+ GRALLOC_USAGE_SW_WRITE_OFTEN | GRALLOC_USAGE_SW_READ_NEVER,
+ android::Rect(pDesc->width, pDesc->height),
+ (void **) &pixels);
+
+ // If we failed to lock the pixel buffer, we're about to crash, but log it first
+ if (!pixels) {
+ ALOGE("Camera failed to gain access to image buffer for writing");
+ }
+
+ // Fill in the test pixels
+ for (unsigned row = 0; row < pDesc->height; row++) {
+ for (unsigned col = 0; col < pDesc->width; col++) {
+ // Index into the row to check the pixel at this column.
+ // We expect 0xFF in the LSB channel, a vertical gradient in the
+ // second channel, a horitzontal gradient in the third channel, and
+ // 0xFF in the MSB.
+ // The exception is the very first 32 bits which is used for the
+ // time varying frame signature to avoid getting fooled by a static image.
+ uint32_t expectedPixel = 0xFF0000FF | // MSB and LSB
+ ((row & 0xFF) << 8) | // vertical gradient
+ ((col & 0xFF) << 16); // horizontal gradient
+ if ((row | col) == 0) {
+ static uint32_t sFrameTicker = 0;
+ expectedPixel = (sFrameTicker) & 0xFF;
+ sFrameTicker++;
+ }
+ pixels[col] = expectedPixel;
+ }
+ // Point to the next row
+ // NOTE: stride retrieved from gralloc is in units of pixels
+ pixels = pixels + pDesc->stride;
+ }
+
+ // Release our output buffer
+ mapper.unlock(buff.buffer.nativeHandle);
+}
+
+
+void EvsCamera::fillTestFrame(const BufferDesc_1_0& buff) {
+ BufferDesc_1_1 newBufDesc = {};
+ AHardwareBuffer_Desc desc = {
+ buff.width, // width
+ buff.height, // height
+ 1, // layers, always 1 for EVS
+ buff.format, // One of AHardwareBuffer_Format
+ buff.usage, // Combination of AHardwareBuffer_UsageFlags
+ buff.stride, // Row stride in pixels
+ 0, // Reserved
+ 0 // Reserved
+ };
+ memcpy(&desc, &newBufDesc.buffer.description, sizeof(desc));
+ newBufDesc.buffer.nativeHandle = buff.memHandle;
+ newBufDesc.pixelSize = buff.pixelSize;
+ newBufDesc.bufferId = buff.bufferId;
+
+ return fillTestFrame(newBufDesc);
+}
+
+
+void EvsCamera::returnBuffer(const uint32_t bufferId, const buffer_handle_t memHandle) {
+ std::lock_guard <std::mutex> lock(mAccessLock);
+
+ if (memHandle == nullptr) {
+ ALOGE("ignoring doneWithFrame called with null handle");
+ } else if (bufferId >= mBuffers.size()) {
+ ALOGE("ignoring doneWithFrame called with invalid bufferId %d (max is %zu)",
+ bufferId, mBuffers.size()-1);
+ } else if (!mBuffers[bufferId].inUse) {
+ ALOGE("ignoring doneWithFrame called on frame %d which is already free",
+ bufferId);
+ } else {
+ // Mark the frame as available
+ mBuffers[bufferId].inUse = false;
+ mFramesInUse--;
+
+ // If this frame's index is high in the array, try to move it down
+ // to improve locality after mFramesAllowed has been reduced.
+ if (bufferId >= mFramesAllowed) {
+ // Find an empty slot lower in the array (which should always exist in this case)
+ for (auto&& rec : mBuffers) {
+ if (rec.handle == nullptr) {
+ rec.handle = mBuffers[bufferId].handle;
+ mBuffers[bufferId].handle = nullptr;
+ break;
+ }
+ }
+ }
+ }
+}
+
+
+} // namespace implementation
+} // namespace V1_0
+} // namespace evs
+} // namespace automotive
+} // namespace hardware
+} // namespace android
diff --git a/automotive/evs/1.1/default/EvsCamera.h b/automotive/evs/1.1/default/EvsCamera.h
new file mode 100644
index 0000000..0982464
--- /dev/null
+++ b/automotive/evs/1.1/default/EvsCamera.h
@@ -0,0 +1,128 @@
+/*
+ * 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.
+ */
+
+#ifndef ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSCAMERA_H
+#define ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSCAMERA_H
+
+#include <android/hardware/automotive/evs/1.1/types.h>
+#include <android/hardware/automotive/evs/1.1/IEvsCamera.h>
+#include <android/hardware/automotive/evs/1.1/IEvsCameraStream.h>
+#include <ui/GraphicBuffer.h>
+
+#include <thread>
+
+using BufferDesc_1_0 = ::android::hardware::automotive::evs::V1_0::BufferDesc;
+using BufferDesc_1_1 = ::android::hardware::automotive::evs::V1_1::BufferDesc;
+using IEvsCameraStream_1_0 = ::android::hardware::automotive::evs::V1_0::IEvsCameraStream;
+using IEvsCameraStream_1_1 = ::android::hardware::automotive::evs::V1_1::IEvsCameraStream;
+using ::android::hardware::automotive::evs::V1_0::EvsResult;
+using ::android::hardware::automotive::evs::V1_0::CameraDesc;
+
+
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace evs {
+namespace V1_1 {
+namespace implementation {
+
+
+// From EvsEnumerator.h
+class EvsEnumerator;
+
+
+class EvsCamera : public IEvsCamera {
+public:
+ // Methods from ::android::hardware::automotive::evs::V1_0::IEvsCamera follow.
+ Return<void> getCameraInfo(getCameraInfo_cb _hidl_cb) override;
+ Return<EvsResult> setMaxFramesInFlight(uint32_t bufferCount) override;
+ Return<EvsResult> startVideoStream(const ::android::sp<IEvsCameraStream_1_0>& stream) override;
+ Return<void> stopVideoStream() override;
+ Return<void> doneWithFrame(const BufferDesc_1_0& buffer) override;
+
+ Return<int32_t> getExtendedInfo(uint32_t opaqueIdentifier) override;
+ Return<EvsResult> setExtendedInfo(uint32_t opaqueIdentifier, int32_t opaqueValue) override;
+
+ // Methods from ::android::hardware::automotive::evs::V1_1::IEvsCamera follow.
+ Return<EvsResult> pauseVideoStream() override;
+ Return<EvsResult> resumeVideoStream() override;
+ Return<EvsResult> doneWithFrame_1_1(const BufferDesc_1_1& buffer) override;
+
+ // Implementation details
+ EvsCamera(const char *id);
+ virtual ~EvsCamera() override;
+ void forceShutdown(); // This gets called if another caller "steals" ownership of the camera
+
+ const CameraDesc& getDesc() { return mDescription; };
+
+ static const char kCameraName_Backup[];
+
+private:
+ // These three functions are expected to be called while mAccessLock is held
+ bool setAvailableFrames_Locked(unsigned bufferCount);
+ unsigned increaseAvailableFrames_Locked(unsigned numToAdd);
+ unsigned decreaseAvailableFrames_Locked(unsigned numToRemove);
+
+ void generateFrames();
+ void fillTestFrame(const BufferDesc_1_0& buff);
+ void fillTestFrame(const BufferDesc_1_1& buff);
+ void returnBuffer(const uint32_t bufferId, const buffer_handle_t memHandle);
+
+ sp<EvsEnumerator> mEnumerator; // The enumerator object that created this camera
+
+ CameraDesc mDescription = {}; // The properties of this camera
+
+ std::thread mCaptureThread; // The thread we'll use to synthesize frames
+
+ uint32_t mWidth = 0; // Horizontal pixel count in the buffers
+ uint32_t mHeight = 0; // Vertical pixel count in the buffers
+ uint32_t mFormat = 0; // Values from android_pixel_format_t
+ uint64_t mUsage = 0; // Values from from Gralloc.h
+ uint32_t mStride = 0; // Bytes per line in the buffers
+
+ sp<IEvsCameraStream_1_1> mStream = nullptr; // The callback used to deliver each frame
+
+ struct BufferRecord {
+ buffer_handle_t handle;
+ bool inUse;
+
+ explicit BufferRecord(buffer_handle_t h) : handle(h), inUse(false) {};
+ };
+
+ std::vector <BufferRecord> mBuffers; // Graphics buffers to transfer images
+ unsigned mFramesAllowed; // How many buffers are we currently using
+ unsigned mFramesInUse; // How many buffers are currently outstanding
+
+ enum StreamStateValues {
+ STOPPED,
+ RUNNING,
+ STOPPING,
+ DEAD,
+ };
+ StreamStateValues mStreamState;
+
+ // Synchronization necessary to deconflict mCaptureThread from the main service thread
+ std::mutex mAccessLock;
+};
+
+} // namespace implementation
+} // namespace V1_1
+} // namespace evs
+} // namespace automotive
+} // namespace hardware
+} // namespace android
+
+#endif // ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSCAMERA_H
diff --git a/automotive/evs/1.1/default/EvsDisplay.cpp b/automotive/evs/1.1/default/EvsDisplay.cpp
new file mode 100644
index 0000000..74c099a
--- /dev/null
+++ b/automotive/evs/1.1/default/EvsDisplay.cpp
@@ -0,0 +1,335 @@
+/*
+ * 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 "EvsDisplay.h"
+
+#include <ui/GraphicBufferAllocator.h>
+#include <ui/GraphicBufferMapper.h>
+
+
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace evs {
+namespace V1_1 {
+namespace implementation {
+
+
+EvsDisplay::EvsDisplay() {
+ ALOGD("EvsDisplay instantiated");
+
+ // Set up our self description
+ // NOTE: These are arbitrary values chosen for testing
+ mInfo.displayId = "Mock Display";
+ mInfo.vendorFlags = 3870;
+
+ // Assemble the buffer description we'll use for our render target
+ mBuffer.width = 320;
+ mBuffer.height = 240;
+ mBuffer.format = HAL_PIXEL_FORMAT_RGBA_8888;
+ mBuffer.usage = GRALLOC_USAGE_HW_RENDER | GRALLOC_USAGE_HW_COMPOSER;
+ mBuffer.bufferId = 0x3870; // Arbitrary magic number for self recognition
+ mBuffer.pixelSize = 4;
+}
+
+
+EvsDisplay::~EvsDisplay() {
+ ALOGD("EvsDisplay being destroyed");
+ forceShutdown();
+}
+
+
+/**
+ * This gets called if another caller "steals" ownership of the display
+ */
+void EvsDisplay::forceShutdown()
+{
+ ALOGD("EvsDisplay forceShutdown");
+ std::lock_guard<std::mutex> lock(mAccessLock);
+
+ // If the buffer isn't being held by a remote client, release it now as an
+ // optimization to release the resources more quickly than the destructor might
+ // get called.
+ if (mBuffer.memHandle) {
+ // Report if we're going away while a buffer is outstanding
+ if (mFrameBusy) {
+ ALOGE("EvsDisplay going down while client is holding a buffer");
+ }
+
+ // Drop the graphics buffer we've been using
+ GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
+ alloc.free(mBuffer.memHandle);
+ mBuffer.memHandle = nullptr;
+ }
+
+ // Put this object into an unrecoverable error state since somebody else
+ // is going to own the display now.
+ mRequestedState = DisplayState::DEAD;
+}
+
+
+/**
+ * Returns basic information about the EVS display provided by the system.
+ * See the description of the DisplayDesc structure for details.
+ */
+Return<void> EvsDisplay::getDisplayInfo(getDisplayInfo_cb _hidl_cb) {
+ ALOGD("getDisplayInfo");
+
+ // Send back our self description
+ _hidl_cb(mInfo);
+ return Void();
+}
+
+
+/**
+ * Clients may set the display state to express their desired state.
+ * The HAL implementation must gracefully accept a request for any state
+ * while in any other state, although the response may be to ignore the request.
+ * The display is defined to start in the NOT_VISIBLE state upon initialization.
+ * The client is then expected to request the VISIBLE_ON_NEXT_FRAME state, and
+ * then begin providing video. When the display is no longer required, the client
+ * is expected to request the NOT_VISIBLE state after passing the last video frame.
+ */
+Return<EvsResult> EvsDisplay::setDisplayState(DisplayState state) {
+ ALOGD("setDisplayState");
+ std::lock_guard<std::mutex> lock(mAccessLock);
+
+ if (mRequestedState == DisplayState::DEAD) {
+ // This object no longer owns the display -- it's been superceeded!
+ return EvsResult::OWNERSHIP_LOST;
+ }
+
+ // Ensure we recognize the requested state so we don't go off the rails
+ if (state < DisplayState::NUM_STATES) {
+ // Record the requested state
+ mRequestedState = state;
+ return EvsResult::OK;
+ }
+ else {
+ // Turn off the display if asked for an unrecognized state
+ mRequestedState = DisplayState::NOT_VISIBLE;
+ return EvsResult::INVALID_ARG;
+ }
+}
+
+
+/**
+ * The HAL implementation should report the actual current state, which might
+ * transiently differ from the most recently requested state. Note, however, that
+ * the logic responsible for changing display states should generally live above
+ * the device layer, making it undesirable for the HAL implementation to
+ * spontaneously change display states.
+ */
+Return<DisplayState> EvsDisplay::getDisplayState() {
+ ALOGD("getDisplayState");
+ std::lock_guard<std::mutex> lock(mAccessLock);
+
+ return mRequestedState;
+}
+
+
+/**
+ * This call returns a handle to a frame buffer associated with the display.
+ * This buffer may be locked and written to by software and/or GL. This buffer
+ * must be returned via a call to returnTargetBufferForDisplay() even if the
+ * display is no longer visible.
+ */
+// TODO: We need to know if/when our client dies so we can get the buffer back! (blocked b/31632518)
+Return<void> EvsDisplay::getTargetBuffer(getTargetBuffer_cb _hidl_cb) {
+ ALOGD("getTargetBuffer");
+ std::lock_guard<std::mutex> lock(mAccessLock);
+
+ if (mRequestedState == DisplayState::DEAD) {
+ ALOGE("Rejecting buffer request from object that lost ownership of the display.");
+ BufferDesc_1_0 nullBuff = {};
+ _hidl_cb(nullBuff);
+ return Void();
+ }
+
+ // If we don't already have a buffer, allocate one now
+ if (!mBuffer.memHandle) {
+ // Allocate the buffer that will hold our displayable image
+ buffer_handle_t handle = nullptr;
+ GraphicBufferAllocator& alloc(GraphicBufferAllocator::get());
+ status_t result = alloc.allocate(
+ mBuffer.width, mBuffer.height, mBuffer.format, 1, mBuffer.usage,
+ &handle, &mBuffer.stride, 0, "EvsDisplay");
+ if (result != NO_ERROR) {
+ ALOGE("Error %d allocating %d x %d graphics buffer",
+ result, mBuffer.width, mBuffer.height);
+ BufferDesc_1_0 nullBuff = {};
+ _hidl_cb(nullBuff);
+ return Void();
+ }
+ if (!handle) {
+ ALOGE("We didn't get a buffer handle back from the allocator");
+ BufferDesc_1_0 nullBuff = {};
+ _hidl_cb(nullBuff);
+ return Void();
+ }
+
+ mBuffer.memHandle = handle;
+ mFrameBusy = false;
+ ALOGD("Allocated new buffer %p with stride %u",
+ mBuffer.memHandle.getNativeHandle(), mBuffer.stride);
+ }
+
+ // Do we have a frame available?
+ if (mFrameBusy) {
+ // This means either we have a 2nd client trying to compete for buffers
+ // (an unsupported mode of operation) or else the client hasn't returned
+ // a previously issued buffer yet (they're behaving badly).
+ // NOTE: We have to make the callback even if we have nothing to provide
+ ALOGE("getTargetBuffer called while no buffers available.");
+ BufferDesc_1_0 nullBuff = {};
+ _hidl_cb(nullBuff);
+ return Void();
+ } else {
+ // Mark our buffer as busy
+ mFrameBusy = true;
+
+ // Send the buffer to the client
+ ALOGD("Providing display buffer handle %p as id %d",
+ mBuffer.memHandle.getNativeHandle(), mBuffer.bufferId);
+ _hidl_cb(mBuffer);
+ return Void();
+ }
+}
+
+
+/**
+ * This call tells the display that the buffer is ready for display.
+ * The buffer is no longer valid for use by the client after this call.
+ */
+Return<EvsResult> EvsDisplay::returnTargetBufferForDisplayImpl(const uint32_t bufferId, const buffer_handle_t memHandle) {
+ ALOGD("returnTargetBufferForDisplay %p", memHandle);
+ std::lock_guard<std::mutex> lock(mAccessLock);
+
+ // Nobody should call us with a null handle
+ if (!memHandle) {
+ ALOGE ("returnTargetBufferForDisplay called without a valid buffer handle.\n");
+ return EvsResult::INVALID_ARG;
+ }
+ if (bufferId != mBuffer.bufferId) {
+ ALOGE ("Got an unrecognized frame returned.\n");
+ return EvsResult::INVALID_ARG;
+ }
+ if (!mFrameBusy) {
+ ALOGE ("A frame was returned with no outstanding frames.\n");
+ return EvsResult::BUFFER_NOT_AVAILABLE;
+ }
+
+ mFrameBusy = false;
+
+ // If we've been displaced by another owner of the display, then we can't do anything else
+ if (mRequestedState == DisplayState::DEAD) {
+ return EvsResult::OWNERSHIP_LOST;
+ }
+
+ // If we were waiting for a new frame, this is it!
+ if (mRequestedState == DisplayState::VISIBLE_ON_NEXT_FRAME) {
+ mRequestedState = DisplayState::VISIBLE;
+ }
+
+ // Validate we're in an expected state
+ if (mRequestedState != DisplayState::VISIBLE) {
+ // We shouldn't get frames back when we're not visible.
+ ALOGE ("Got an unexpected frame returned while not visible - ignoring.\n");
+ } else {
+ // This is where the buffer would be made visible.
+ // For now we simply validate it has the data we expect in it by reading it back
+
+ // Lock our display buffer for reading
+ uint32_t* pixels = nullptr;
+ GraphicBufferMapper &mapper = GraphicBufferMapper::get();
+ mapper.lock(mBuffer.memHandle,
+ GRALLOC_USAGE_SW_READ_OFTEN | GRALLOC_USAGE_SW_WRITE_NEVER,
+ android::Rect(mBuffer.width, mBuffer.height),
+ (void **)&pixels);
+
+ // If we failed to lock the pixel buffer, we're about to crash, but log it first
+ if (!pixels) {
+ ALOGE("Display failed to gain access to image buffer for reading");
+ }
+
+ // Check the test pixels
+ bool frameLooksGood = true;
+ for (unsigned row = 0; row < mBuffer.height; row++) {
+ for (unsigned col = 0; col < mBuffer.width; col++) {
+ // Index into the row to check the pixel at this column.
+ // We expect 0xFF in the LSB channel, a vertical gradient in the
+ // second channel, a horitzontal gradient in the third channel, and
+ // 0xFF in the MSB.
+ // The exception is the very first 32 bits which is used for the
+ // time varying frame signature to avoid getting fooled by a static image.
+ uint32_t expectedPixel = 0xFF0000FF | // MSB and LSB
+ ((row & 0xFF) << 8) | // vertical gradient
+ ((col & 0xFF) << 16); // horizontal gradient
+ if ((row | col) == 0) {
+ // we'll check the "uniqueness" of the frame signature below
+ continue;
+ }
+ // Walk across this row (we'll step rows below)
+ uint32_t receivedPixel = pixels[col];
+ if (receivedPixel != expectedPixel) {
+ ALOGE("Pixel check mismatch in frame buffer");
+ frameLooksGood = false;
+ break;
+ }
+ }
+
+ if (!frameLooksGood) {
+ break;
+ }
+
+ // Point to the next row (NOTE: gralloc reports stride in units of pixels)
+ pixels = pixels + mBuffer.stride;
+ }
+
+ // Ensure we don't see the same buffer twice without it being rewritten
+ static uint32_t prevSignature = ~0;
+ uint32_t signature = pixels[0] & 0xFF;
+ if (prevSignature == signature) {
+ frameLooksGood = false;
+ ALOGE("Duplicate, likely stale frame buffer detected");
+ }
+
+
+ // Release our output buffer
+ mapper.unlock(mBuffer.memHandle);
+
+ if (!frameLooksGood) {
+ return EvsResult::UNDERLYING_SERVICE_ERROR;
+ }
+ }
+
+ return EvsResult::OK;
+}
+
+
+Return<EvsResult> EvsDisplay::returnTargetBufferForDisplay(const BufferDesc_1_0& buffer) {
+ return returnTargetBufferForDisplayImpl(buffer.bufferId, buffer.memHandle);
+}
+
+
+} // namespace implementation
+} // namespace V1_1
+} // namespace evs
+} // namespace automotive
+} // namespace hardware
+} // namespace android
diff --git a/automotive/evs/1.1/default/EvsDisplay.h b/automotive/evs/1.1/default/EvsDisplay.h
new file mode 100644
index 0000000..2a56535
--- /dev/null
+++ b/automotive/evs/1.1/default/EvsDisplay.h
@@ -0,0 +1,72 @@
+/*
+ * 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.
+ */
+
+#ifndef ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSDISPLAY_H
+#define ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSDISPLAY_H
+
+#include <android/hardware/automotive/evs/1.0/IEvsDisplay.h>
+#include <ui/GraphicBuffer.h>
+
+using ::android::hardware::automotive::evs::V1_0::IEvsDisplay;
+using ::android::hardware::automotive::evs::V1_0::DisplayDesc;
+using ::android::hardware::automotive::evs::V1_0::DisplayState;
+using ::android::hardware::automotive::evs::V1_0::EvsResult;
+using BufferDesc_1_0 = ::android::hardware::automotive::evs::V1_0::BufferDesc;
+
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace evs {
+namespace V1_1 {
+namespace implementation {
+
+
+class EvsDisplay : public IEvsDisplay {
+public:
+ // Methods from ::android::hardware::automotive::evs::V1_0::IEvsDisplay follow.
+ Return<void> getDisplayInfo(getDisplayInfo_cb _hidl_cb) override;
+ Return<EvsResult> setDisplayState(DisplayState state) override;
+ Return<DisplayState> getDisplayState() override;
+ Return<void> getTargetBuffer(getTargetBuffer_cb _hidl_cb) override;
+ Return<EvsResult> returnTargetBufferForDisplay(const BufferDesc_1_0& buffer) override;
+
+
+ // Implementation details
+ EvsDisplay();
+ virtual ~EvsDisplay() override;
+
+ void forceShutdown(); // This gets called if another caller "steals" ownership of the display
+ Return<EvsResult> returnTargetBufferForDisplayImpl(const uint32_t bufferId,
+ const buffer_handle_t memHandle);
+
+private:
+ DisplayDesc mInfo = {};
+ BufferDesc_1_0 mBuffer = {}; // A graphics buffer into which we'll store images
+
+ bool mFrameBusy = false; // A flag telling us our buffer is in use
+ DisplayState mRequestedState = DisplayState::NOT_VISIBLE;
+
+ std::mutex mAccessLock;
+};
+
+} // namespace implementation
+} // namespace V1_1
+} // namespace evs
+} // namespace automotive
+} // namespace hardware
+} // namespace android
+
+#endif // ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSDISPLAY_H
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
diff --git a/automotive/evs/1.1/default/EvsEnumerator.h b/automotive/evs/1.1/default/EvsEnumerator.h
new file mode 100644
index 0000000..11c2170
--- /dev/null
+++ b/automotive/evs/1.1/default/EvsEnumerator.h
@@ -0,0 +1,81 @@
+/*
+ * 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.
+ */
+
+#ifndef ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSCAMERAENUMERATOR_H
+#define ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSCAMERAENUMERATOR_H
+
+#include <android/hardware/automotive/evs/1.0/IEvsEnumerator.h>
+#include <android/hardware/automotive/evs/1.1/IEvsCamera.h>
+
+#include <list>
+
+using ::android::hardware::automotive::evs::V1_0::EvsResult;
+using ::android::hardware::automotive::evs::V1_0::IEvsDisplay;
+using ::android::hardware::automotive::evs::V1_0::DisplayState;
+using ::android::hardware::automotive::evs::V1_0::IEvsEnumerator;
+using IEvsCamera_1_0 = ::android::hardware::automotive::evs::V1_0::IEvsCamera;
+using IEvsCamera_1_1 = ::android::hardware::automotive::evs::V1_1::IEvsCamera;
+using CameraDesc_1_0 = ::android::hardware::automotive::evs::V1_0::CameraDesc;
+
+
+namespace android {
+namespace hardware {
+namespace automotive {
+namespace evs {
+namespace V1_1 {
+namespace implementation {
+
+
+class EvsCamera; // from EvsCamera.h
+class EvsDisplay; // from EvsDisplay.h
+
+
+class EvsEnumerator : public IEvsEnumerator {
+public:
+ // Methods from ::android::hardware::automotive::evs::V1_0::IEvsEnumerator follow.
+ Return<void> getCameraList(getCameraList_cb _hidl_cb) override;
+ Return<sp<IEvsCamera_1_0>> openCamera(const hidl_string& cameraId) override;
+ Return<void> closeCamera(const ::android::sp<IEvsCamera_1_0>& carCamera) override;
+ Return<sp<IEvsDisplay>> openDisplay() override;
+ Return<void> closeDisplay(const ::android::sp<IEvsDisplay>& display) override;
+ Return<DisplayState> getDisplayState() override;
+
+ // Implementation details
+ EvsEnumerator();
+
+private:
+ // 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.
+ struct CameraRecord {
+ CameraDesc_1_0 desc;
+ wp<EvsCamera> activeInstance;
+
+ CameraRecord(const char *cameraId) : desc() { desc.cameraId = cameraId; }
+ };
+ static std::list<CameraRecord> sCameraList;
+
+ static wp<EvsDisplay> sActiveDisplay; // Weak pointer. Object destructs if client dies.
+};
+
+} // namespace implementation
+} // namespace V1_1
+} // namespace evs
+} // namespace automotive
+} // namespace hardware
+} // namespace android
+
+#endif // ANDROID_HARDWARE_AUTOMOTIVE_EVS_V1_1_EVSCAMERAENUMERATOR_H
diff --git a/automotive/evs/1.1/default/ServiceNames.h b/automotive/evs/1.1/default/ServiceNames.h
new file mode 100644
index 0000000..1178da5
--- /dev/null
+++ b/automotive/evs/1.1/default/ServiceNames.h
@@ -0,0 +1,17 @@
+/*
+ * 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.
+ */
+
+const static char kEnumeratorServiceName[] = "EvsEnumeratorHw";
diff --git a/automotive/evs/1.1/default/android.hardware.automotive.evs@1.1-service.rc b/automotive/evs/1.1/default/android.hardware.automotive.evs@1.1-service.rc
new file mode 100644
index 0000000..284b3fd
--- /dev/null
+++ b/automotive/evs/1.1/default/android.hardware.automotive.evs@1.1-service.rc
@@ -0,0 +1,5 @@
+service vendor.evs-hal-mock /vendor/bin/hw/android.hardware.automotive.evs@1.1-service
+ class hal
+ user automotive_evs
+ group automotive_evs
+ disabled
diff --git a/automotive/evs/1.1/default/service.cpp b/automotive/evs/1.1/default/service.cpp
new file mode 100644
index 0000000..128a14a
--- /dev/null
+++ b/automotive/evs/1.1/default/service.cpp
@@ -0,0 +1,63 @@
+/*
+ * 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 <unistd.h>
+
+#include <hidl/HidlTransportSupport.h>
+#include <log/log.h>
+#include <utils/Errors.h>
+#include <utils/StrongPointer.h>
+
+#include "ServiceNames.h"
+#include "EvsEnumerator.h"
+#include "EvsDisplay.h"
+
+
+// libhidl:
+using android::hardware::configureRpcThreadpool;
+using android::hardware::joinRpcThreadpool;
+
+// Generated HIDL files
+using android::hardware::automotive::evs::V1_0::IEvsEnumerator;
+using android::hardware::automotive::evs::V1_0::IEvsDisplay;
+
+// The namespace in which all our implementation code lives
+using namespace android::hardware::automotive::evs::V1_1::implementation;
+using namespace android;
+
+
+int main() {
+ ALOGI("EVS Hardware Enumerator service is starting");
+ android::sp<IEvsEnumerator> service = new EvsEnumerator();
+
+ configureRpcThreadpool(1, true /* callerWillJoin */);
+
+ // Register our service -- if somebody is already registered by our name,
+ // they will be killed (their thread pool will throw an exception).
+ status_t status = service->registerAsService(kEnumeratorServiceName);
+ if (status == OK) {
+ ALOGD("%s is ready.", kEnumeratorServiceName);
+ joinRpcThreadpool();
+ } else {
+ ALOGE("Could not register service %s (%d).", kEnumeratorServiceName, status);
+ }
+
+ // In normal operation, we don't expect the thread pool to exit
+ ALOGE("EVS Hardware Enumerator is shutting down");
+ return 1;
+}