Hanlding Streams and States (0d14a829) · Commits · e / os / android_hardware_interfaces

automotive/evs/aidl/impl/default/Android.bp

+17 −0

Original line number	Diff line number	Diff line
		@@ -105,4 +105,21 @@ cc_test {
		"android.hardware.automotive.evs-aidl-default-service-lib",
		"libgmock",
		],
		test_suites: [
		"general-tests",
		],
		}

		cc_test {
		name: "android.hardware.automotive.evs-aidl-default-service_cam_state_test",
		defaults: ["android.hardware.automotive.evs-aidl-default-service-default"],
		vendor: true,
		srcs: ["tests/EvsCameraStateTest.cpp"],
		static_libs: [
		"android.hardware.automotive.evs-aidl-default-service-lib",
		"libgmock",
		],
		test_suites: [
		"general-tests",
		],
		}

automotive/evs/aidl/impl/default/include/EvsCamera.h

+40 −0

Original line number	Diff line number	Diff line
		@@ -18,6 +18,7 @@

		#include "EvsCameraBase.h"

		#include <aidl/android/hardware/automotive/evs/IEvsCameraStream.h>
		#include <cutils/native_handle.h>

		#include <cstddef>
		@@ -45,11 +46,41 @@ class EvsCamera : public EvsCameraBase {

		ndk::ScopedAStatus setMaxFramesInFlight(int32_t bufferCount) override;

		ndk::ScopedAStatus startVideoStream(
		const std::shared_ptr<evs::IEvsCameraStream>& receiver) override;

		ndk::ScopedAStatus stopVideoStream() override;

		ndk::ScopedAStatus pauseVideoStream() override;

		ndk::ScopedAStatus resumeVideoStream() override;

		protected:
		virtual ::android::status_t allocateOneFrame(buffer_handle_t* handle) = 0;

		virtual void freeOneFrame(const buffer_handle_t handle);

		virtual bool preVideoStreamStart_locked(const std::shared_ptr<evs::IEvsCameraStream>& receiver,
		ndk::ScopedAStatus& status,
		std::unique_lock<std::mutex>& lck);

		virtual bool startVideoStreamImpl_locked(const std::shared_ptr<evs::IEvsCameraStream>& receiver,
		ndk::ScopedAStatus& status,
		std::unique_lock<std::mutex>& lck) = 0;

		virtual bool postVideoStreamStart_locked(const std::shared_ptr<evs::IEvsCameraStream>& receiver,
		ndk::ScopedAStatus& status,
		std::unique_lock<std::mutex>& lck);

		virtual bool preVideoStreamStop_locked(ndk::ScopedAStatus& status,
		std::unique_lock<std::mutex>& lck);

		virtual bool stopVideoStreamImpl_locked(ndk::ScopedAStatus& status,
		std::unique_lock<std::mutex>& lck) = 0;

		virtual bool postVideoStreamStop_locked(ndk::ScopedAStatus& status,
		std::unique_lock<std::mutex>& lck);

		void shutdown() override;

		void closeAllBuffers_unsafe();
		@@ -81,6 +112,15 @@ class EvsCamera : public EvsCameraBase {
		bool inUse{false};
		};

		enum class StreamState {
		STOPPED = 0,
		RUNNING = 1,
		STOPPING = 2,
		DEAD = 3,
		};

		StreamState mStreamState{StreamState::STOPPED};

		std::mutex mMutex;

		// Graphics buffers to transfer images, always in the order of:

automotive/evs/aidl/impl/default/src/EvsCamera.cpp

+112 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,9 @@ namespace aidl::android::hardware::automotive::evs::implementation {
		// Safeguards against unreasonable resource consumption and provides a testable limit
		constexpr std::size_t kMaxBuffersInFlight = 100;

		// Minimum number of buffers to run a video stream
		constexpr int kMinimumBuffersInFlight = 1;

		EvsCamera::~EvsCamera() {
		shutdown();
		}
		@@ -108,6 +111,113 @@ void EvsCamera::freeOneFrame(const buffer_handle_t handle) {
		alloc.free(handle);
		}

		bool EvsCamera::preVideoStreamStart_locked(const std::shared_ptr<evs::IEvsCameraStream>& receiver,
		ndk::ScopedAStatus& status,
		std::unique_lock<std::mutex>& /* lck */) {
		if (!receiver) {
		LOG(ERROR) << __func__ << ": Null receiver.";
		status = ndk::ScopedAStatus::fromServiceSpecificError(
		static_cast<int>(EvsResult::INVALID_ARG));
		return false;
		}

		// If we've been displaced by another owner of the camera, then we can't do anything else
		if (mStreamState == StreamState::DEAD) {
		LOG(ERROR) << __func__ << ": Ignoring when camera has been lost.";
		status = ndk::ScopedAStatus::fromServiceSpecificError(
		static_cast<int>(EvsResult::OWNERSHIP_LOST));
		return false;
		}

		if (mStreamState != StreamState::STOPPED) {
		LOG(ERROR) << __func__ << ": Ignoring when a stream is already running.";
		status = ndk::ScopedAStatus::fromServiceSpecificError(
		static_cast<int>(EvsResult::STREAM_ALREADY_RUNNING));
		return false;
		}

		// If the client never indicated otherwise, configure ourselves for a single streaming buffer
		if (mAvailableFrames < kMinimumBuffersInFlight &&
		!setAvailableFrames_unsafe(kMinimumBuffersInFlight)) {
		LOG(ERROR) << __func__ << "Failed to because we could not get a graphics buffer.";
		status = ndk::ScopedAStatus::fromServiceSpecificError(
		static_cast<int>(EvsResult::BUFFER_NOT_AVAILABLE));
		return false;
		}
		mStreamState = StreamState::RUNNING;
		return true;
		}

		bool EvsCamera::postVideoStreamStart_locked(
		const std::shared_ptr<evs::IEvsCameraStream>& /* receiver */,
		ndk::ScopedAStatus& /* status /, std::unique_lock<std::mutex>& / lck */) {
		return true;
		}

		bool EvsCamera::preVideoStreamStop_locked(ndk::ScopedAStatus& status,
		std::unique_lock<std::mutex>& /* lck */) {
		if (mStreamState != StreamState::RUNNING) {
		// Terminate the stop process because a stream is not running.
		status = ndk::ScopedAStatus::ok();
		return false;
		}
		mStreamState = StreamState::STOPPING;
		return true;
		}

		bool EvsCamera::postVideoStreamStop_locked(ndk::ScopedAStatus& /* status */,
		std::unique_lock<std::mutex>& /* lck */) {
		mStreamState = StreamState::STOPPED;
		return true;
		}

		ndk::ScopedAStatus EvsCamera::startVideoStream(
		const std::shared_ptr<evs::IEvsCameraStream>& receiver) {
		bool needShutdown = false;
		auto status = ndk::ScopedAStatus::ok();
		{
		std::unique_lock lck(mMutex);
		if (!preVideoStreamStart_locked(receiver, status, lck)) {
		return status;
		}

		if ((!startVideoStreamImpl_locked(receiver, status, lck) \|\|
		!postVideoStreamStart_locked(receiver, status, lck)) &&
		!status.isOk()) {
		needShutdown = true;
		}
		}
		if (needShutdown) {
		shutdown();
		}
		return status;
		}

		ndk::ScopedAStatus EvsCamera::stopVideoStream() {
		bool needShutdown = false;
		auto status = ndk::ScopedAStatus::ok();
		{
		std::unique_lock lck(mMutex);
		if ((!preVideoStreamStop_locked(status, lck) \|\| !stopVideoStreamImpl_locked(status, lck) \|\|
		!postVideoStreamStop_locked(status, lck)) &&
		!status.isOk()) {
		needShutdown = true;
		}
		}
		if (needShutdown) {
		shutdown();
		}
		return status;
		}

		ndk::ScopedAStatus EvsCamera::pauseVideoStream() {
		return ndk::ScopedAStatus::fromServiceSpecificError(static_cast<int>(EvsResult::NOT_SUPPORTED));
		}

		ndk::ScopedAStatus EvsCamera::resumeVideoStream() {
		return ndk::ScopedAStatus::fromServiceSpecificError(static_cast<int>(EvsResult::NOT_SUPPORTED));
		}

		bool EvsCamera::setAvailableFrames_unsafe(const std::size_t bufferCount) {
		if (bufferCount < 1) {
		LOG(ERROR) << "Ignoring request to set buffer count to zero.";
		@@ -159,8 +269,10 @@ bool EvsCamera::setAvailableFrames_unsafe(const std::size_t bufferCount) {
		}

		void EvsCamera::shutdown() {
		stopVideoStream();
		std::lock_guard lck(mMutex);
		closeAllBuffers_unsafe();
		mStreamState = StreamState::DEAD;
		}

		void EvsCamera::closeAllBuffers_unsafe() {

automotive/evs/aidl/impl/default/tests/EvsCameraBufferTest.cpp

+7 −8

Original line number	Diff line number	Diff line
		@@ -77,8 +77,6 @@ class EvsCameraForTest : public EvsCamera {
		(const std::string& in_deviceId,
		::aidl::android::hardware::automotive::evs::CameraDesc* _aidl_return),
		(override));
		MOCK_METHOD(::ndk::ScopedAStatus, pauseVideoStream, (), (override));
		MOCK_METHOD(::ndk::ScopedAStatus, resumeVideoStream, (), (override));
		MOCK_METHOD(::ndk::ScopedAStatus, setExtendedInfo,
		(int32_t in_opaqueIdentifier, const std::vector<uint8_t>& in_opaqueValue),
		(override));
		@@ -87,12 +85,13 @@ class EvsCameraForTest : public EvsCamera {
		std::vector<int32_t>* _aidl_return),
		(override));
		MOCK_METHOD(::ndk::ScopedAStatus, setPrimaryClient, (), (override));
		MOCK_METHOD(::ndk::ScopedAStatus, startVideoStream,
		(const std::shared_ptr<
		::aidl::android::hardware::automotive::evs::IEvsCameraStream>& in_receiver),
		(override));
		MOCK_METHOD(::ndk::ScopedAStatus, stopVideoStream, (), (override));
		MOCK_METHOD(::ndk::ScopedAStatus, unsetPrimaryClient, (), (override));
		MOCK_METHOD(bool, startVideoStreamImpl_locked,
		(const std::shared_ptr<evs::IEvsCameraStream>& receiver, ndk::ScopedAStatus& status,
		std::unique_lock<std::mutex>& lck),
		(override));
		MOCK_METHOD(bool, stopVideoStreamImpl_locked,
		(ndk::ScopedAStatus & status, std::unique_lock<std::mutex>& lck), (override));
		};

		TEST(EvsCameraBufferTest, ChangeBufferPoolSize) {
		@@ -118,7 +117,7 @@ TEST(EvsCameraBufferTest, ChangeBufferPoolSize) {
		evsCam->checkBufferOrder();
		}

		TEST(EvsCameraForTest, UseAndReturn) {
		TEST(EvsCameraBufferTest, UseAndReturn) {
		constexpr std::size_t kNumOfHandles = 20;
		auto evsCam = ndk::SharedRefBase::make<EvsCameraForTest>();

automotive/evs/aidl/impl/default/tests/EvsCameraStateTest.cpp

0 → 100644

+202 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2023 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.
		*/

		#include "EvsCamera.h"

		#include <gmock/gmock.h>
		#include <gtest/gtest.h>

		#include <cstdint>
		#include <unordered_set>
		#include <vector>

		namespace aidl::android::hardware::automotive::evs::implementation {

		class EvsCameraForTest : public EvsCamera {
		private:
		using Base = EvsCamera;

		public:
		using EvsCamera::mStreamState;
		using EvsCamera::shutdown;
		using EvsCamera::StreamState;

		~EvsCameraForTest() override { shutdown(); }

		::android::status_t allocateOneFrame(buffer_handle_t* handle) override {
		static std::intptr_t handle_cnt = 0;
		*handle = reinterpret_cast<buffer_handle_t>(++handle_cnt);
		return ::android::OK;
		}

		void freeOneFrame(const buffer_handle_t /* handle */) override {
		// Nothing to free because the handles are fake.
		}

		bool preVideoStreamStart_locked(const std::shared_ptr<evs::IEvsCameraStream>& receiver,
		ndk::ScopedAStatus& status,
		std::unique_lock<std::mutex>& lck) override {
		mPreStartCalled = true;
		EXPECT_EQ(mStreamState, StreamState::STOPPED);
		EXPECT_FALSE(mStreamStarted);
		EXPECT_FALSE(mStreamStopped);
		return Base::preVideoStreamStart_locked(receiver, status, lck);
		}

		bool startVideoStreamImpl_locked(const std::shared_ptr<evs::IEvsCameraStream>& /* receiver */,
		ndk::ScopedAStatus& /* status */,
		std::unique_lock<std::mutex>& /* lck */) override {
		EXPECT_EQ(mStreamState, StreamState::RUNNING);
		EXPECT_FALSE(mStreamStarted);
		EXPECT_FALSE(mStreamStopped);
		mStreamStarted = true;
		return true;
		}

		bool postVideoStreamStart_locked(const std::shared_ptr<evs::IEvsCameraStream>& receiver,
		ndk::ScopedAStatus& status,
		std::unique_lock<std::mutex>& lck) override {
		mPostStartCalled = true;
		EXPECT_EQ(mStreamState, StreamState::RUNNING);
		EXPECT_TRUE(mStreamStarted);
		EXPECT_FALSE(mStreamStopped);
		return Base::postVideoStreamStart_locked(receiver, status, lck);
		}

		bool preVideoStreamStop_locked(ndk::ScopedAStatus& status,
		std::unique_lock<std::mutex>& lck) override {
		// Skip the check if stop was called before.
		if (!mPreStopCalled) {
		mPreStopCalled = true;
		EXPECT_EQ(mStreamState, StreamState::RUNNING);
		EXPECT_TRUE(mStreamStarted);
		EXPECT_FALSE(mStreamStopped);
		}
		return Base::preVideoStreamStop_locked(status, lck);
		}

		bool stopVideoStreamImpl_locked(ndk::ScopedAStatus& /* status */,
		std::unique_lock<std::mutex>& /* lck */) override {
		EXPECT_EQ(mStreamState, StreamState::STOPPING);
		EXPECT_TRUE(mStreamStarted);
		EXPECT_FALSE(mStreamStopped);
		mStreamStopped = true;
		return true;
		}

		bool postVideoStreamStop_locked(ndk::ScopedAStatus& status,
		std::unique_lock<std::mutex>& lck) override {
		mPostStopCalled = true;
		const auto ret = Base::postVideoStreamStop_locked(status, lck);
		EXPECT_EQ(mStreamState, StreamState::STOPPED);
		EXPECT_TRUE(mStreamStarted);
		EXPECT_TRUE(mStreamStopped);
		return ret;
		}

		MOCK_METHOD(::ndk::ScopedAStatus, forcePrimaryClient,
		(const std::shared_ptr<::aidl::android::hardware::automotive::evs::IEvsDisplay>&
		in_display),
		(override));
		MOCK_METHOD(::ndk::ScopedAStatus, getCameraInfo,
		(::aidl::android::hardware::automotive::evs::CameraDesc * _aidl_return),
		(override));
		MOCK_METHOD(::ndk::ScopedAStatus, getExtendedInfo,
		(int32_t in_opaqueIdentifier, std::vector<uint8_t>* _aidl_return), (override));
		MOCK_METHOD(::ndk::ScopedAStatus, getIntParameter,
		(::aidl::android::hardware::automotive::evs::CameraParam in_id,
		std::vector<int32_t>* _aidl_return),
		(override));
		MOCK_METHOD(::ndk::ScopedAStatus, getIntParameterRange,
		(::aidl::android::hardware::automotive::evs::CameraParam in_id,
		::aidl::android::hardware::automotive::evs::ParameterRange* _aidl_return),
		(override));
		MOCK_METHOD(::ndk::ScopedAStatus, getParameterList,
		(std::vector<::aidl::android::hardware::automotive::evs::CameraParam> *
		_aidl_return),
		(override));
		MOCK_METHOD(::ndk::ScopedAStatus, getPhysicalCameraInfo,
		(const std::string& in_deviceId,
		::aidl::android::hardware::automotive::evs::CameraDesc* _aidl_return),
		(override));
		MOCK_METHOD(::ndk::ScopedAStatus, setExtendedInfo,
		(int32_t in_opaqueIdentifier, const std::vector<uint8_t>& in_opaqueValue),
		(override));
		MOCK_METHOD(::ndk::ScopedAStatus, setIntParameter,
		(::aidl::android::hardware::automotive::evs::CameraParam in_id, int32_t in_value,
		std::vector<int32_t>* _aidl_return),
		(override));
		MOCK_METHOD(::ndk::ScopedAStatus, setPrimaryClient, (), (override));
		MOCK_METHOD(::ndk::ScopedAStatus, unsetPrimaryClient, (), (override));

		bool mStreamStarted = false;
		bool mStreamStopped = false;
		bool mPreStartCalled = false;
		bool mPostStartCalled = false;
		bool mPreStopCalled = false;
		bool mPostStopCalled = false;
		};

		class MockEvsCameraStream : public evs::IEvsCameraStream {
		MOCK_METHOD(::ndk::SpAIBinder, asBinder, (), (override));
		MOCK_METHOD(bool, isRemote, (), (override));
		MOCK_METHOD(
		::ndk::ScopedAStatus, deliverFrame,
		(const std::vector<::aidl::android::hardware::automotive::evs::BufferDesc>& in_buffer),
		(override));
		MOCK_METHOD(::ndk::ScopedAStatus, notify,
		(const ::aidl::android::hardware::automotive::evs::EvsEventDesc& in_event),
		(override));
		MOCK_METHOD(::ndk::ScopedAStatus, getInterfaceVersion, (int32_t * _aidl_return), (override));
		MOCK_METHOD(::ndk::ScopedAStatus, getInterfaceHash, (std::string * _aidl_return), (override));
		};

		using StreamState = EvsCameraForTest::StreamState;

		TEST(EvsCameraStateTest, StateChangeHooks) {
		auto evsCam = ndk::SharedRefBase::make<EvsCameraForTest>();
		auto mockStream = ndk::SharedRefBase::make<MockEvsCameraStream>();
		EXPECT_FALSE(evsCam->mPreStartCalled);
		EXPECT_FALSE(evsCam->mPostStartCalled);
		EXPECT_FALSE(evsCam->mPreStopCalled);
		EXPECT_FALSE(evsCam->mPostStopCalled);
		EXPECT_FALSE(evsCam->mStreamStarted);
		EXPECT_FALSE(evsCam->mStreamStopped);
		EXPECT_EQ(evsCam->mStreamState, StreamState::STOPPED);
		evsCam->startVideoStream(mockStream);

		EXPECT_TRUE(evsCam->mPreStartCalled);
		EXPECT_TRUE(evsCam->mPostStartCalled);
		EXPECT_FALSE(evsCam->mPreStopCalled);
		EXPECT_FALSE(evsCam->mPostStopCalled);
		EXPECT_TRUE(evsCam->mStreamStarted);
		EXPECT_FALSE(evsCam->mStreamStopped);
		EXPECT_EQ(evsCam->mStreamState, StreamState::RUNNING);
		evsCam->stopVideoStream();

		EXPECT_TRUE(evsCam->mPreStartCalled);
		EXPECT_TRUE(evsCam->mPostStartCalled);
		EXPECT_TRUE(evsCam->mPreStopCalled);
		EXPECT_TRUE(evsCam->mPostStopCalled);
		EXPECT_TRUE(evsCam->mStreamStarted);
		EXPECT_TRUE(evsCam->mStreamStopped);
		EXPECT_EQ(evsCam->mStreamState, StreamState::STOPPED);

		evsCam->shutdown();
		EXPECT_EQ(evsCam->mStreamState, StreamState::DEAD);
		}

		} // namespace aidl::android::hardware::automotive::evs::implementation