Codec 2.0: fix multi-fd sync fence support (a9d953ed) · Commits · e / os / android_frameworks_av

media/codec2/tests/Android.bp

+6 −0

Original line number	Diff line number	Diff line
		@@ -45,6 +45,11 @@ cc_test {
		"C2SampleComponent_test.cpp",
		"C2UtilTest.cpp",
		"vndk/C2BufferTest.cpp",
		"vndk/C2FenceTest.cpp",
		],

		static_libs: [
		"libgmock",
		],

		shared_libs: [
		@@ -52,6 +57,7 @@ cc_test {
		"libcodec2_vndk",
		"libcutils",
		"liblog",
		"libui",
		"libutils",
		],

media/codec2/tests/vndk/C2FenceTest.cpp

0 → 100644

+455 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright 2024 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 <gmock/gmock.h>
		#include <gtest/gtest.h>

		#include <C2Buffer.h>
		#include <C2FenceFactory.h>

		#include <unistd.h>

		#include <android-base/unique_fd.h>
		#include <linux/kcmp.h> /* Definition of KCMP_* constants */
		#include <sys/mman.h>
		#include <sys/syscall.h> /* Definition of SYS_* constants */
		#include <ui/Fence.h>

		namespace android {

		static int fd_kcmp(int fd1, int fd2) {
		static pid_t pid = getpid();

		return syscall(SYS_kcmp, pid, pid, KCMP_FILE, fd1, fd2);
		}

		// matcher to check if value (arg) and fd refers to the same file
		MATCHER_P(RefersToTheSameFile, fd, "") {
		return fd_kcmp(fd, arg) == 0;
		}

		// matcher to check if value (arg) is a dup of an fd
		MATCHER_P(IsDupOf, fd, "") {
		return (ExplainMatchResult(::testing::Ne(-1), arg, result_listener) &&
		ExplainMatchResult(::testing::Ne(fd), arg, result_listener) &&
		ExplainMatchResult(RefersToTheSameFile(fd), arg, result_listener));
		}

		class C2FenceTest : public ::testing::Test {
		public:
		C2FenceTest() = default;

		~C2FenceTest() = default;


		protected:
		enum : int32_t {
		SYNC_FENCE_DEPRECATED_MAGIC = 3,
		SYNC_FENCE_UNORDERED_MAGIC = '\302fsu',
		SYNC_FENCE_MAGIC = '\302fso',
		};

		// Validate a null fence
		void validateNullFence(const C2Fence &fence);

		// Validate a single fd sync fence
		void validateSingleFdFence(const C2Fence &fence, int fd);

		// Validate a two fd unordered sync fence
		void validateTwoFdUnorderedFence(const C2Fence &fence, int fd1, int fd2, int mergeFd);

		// Validate a three fd sync fence
		void validateThreeFdFence(const C2Fence &fence, int fd1, int fd2, int fd3);
		};

		TEST_F(C2FenceTest, IsDupOf_sanity) {
		int fd1 = memfd_create("test1", 0 /* flags */);
		int fd2 = memfd_create("test2", 0 /* flags */);
		int fd3 = memfd_create("test3", 0 /* flags */);

		EXPECT_THAT(fd1, ::testing::Not(IsDupOf(fd2)));
		EXPECT_THAT(-1, ::testing::Not(IsDupOf(fd2)));
		EXPECT_THAT(-1, ::testing::Not(IsDupOf(-1)));
		EXPECT_THAT(fd3, ::testing::Not(IsDupOf(fd3)));

		int fd4 = dup(fd3);
		EXPECT_THAT(fd4, IsDupOf(fd3));
		EXPECT_THAT(fd3, IsDupOf(fd4));

		close(fd1);
		close(fd2);
		close(fd3);
		close(fd4);
		}

		TEST_F(C2FenceTest, NullFence) {
		validateNullFence(C2Fence());
		}

		void C2FenceTest::validateNullFence(const C2Fence &fence) {
		// Verify that the fence is valid.
		EXPECT_TRUE(fence.valid());
		EXPECT_TRUE(fence.ready());
		base::unique_fd fenceFd{fence.fd()};
		EXPECT_EQ(fenceFd.get(), -1);
		EXPECT_FALSE(fence.isHW()); // perhaps this should be false for a null fence

		// A null fence has no fds
		std::vector<int> fds = ExtractFdsFromCodec2SyncFence(fence);
		EXPECT_THAT(fds, ::testing::IsEmpty());
		for (int fd : fds) {
		close(fd);
		}

		// A null fence has no native handle
		native_handle_t *handle = _C2FenceFactory::CreateNativeHandle(fence);
		EXPECT_THAT(handle, ::testing::IsNull());
		if (handle) {
		native_handle_close(handle);
		native_handle_delete(handle);
		}
		}

		TEST_F(C2FenceTest, SyncFence_with_negative_fd) {
		// Create a SyncFence with a negative fd.
		C2Fence fence = _C2FenceFactory::CreateSyncFence(-1, false /* validate */);

		validateNullFence(fence);
		}

		TEST_F(C2FenceTest, SyncFence_with_valid_fd) {
		// Create a SyncFence with a valid fd. We cannot create an actual sync fd,
		// so we cannot test wait(), but we can verify the ABI APIs

		int fd = memfd_create("test", 0 /* flags */);

		C2Fence fence = _C2FenceFactory::CreateSyncFence(fd, false /* validate */);
		validateSingleFdFence(fence, fd);
		}

		void C2FenceTest::validateSingleFdFence(const C2Fence &fence, int fd) {
		// EXPECT_TRUE(fence.valid()); // need a valid sync fd to test this
		// EXPECT_TRUE(fence.ready());
		// Verify that the fence says it is a HW sync fence.
		EXPECT_TRUE(fence.isHW()); // FIXME this may be an implementation detail

		// Verify that the fd returned is a duped version of the initial fd
		base::unique_fd fenceFd{fence.fd()};
		EXPECT_THAT(fenceFd.get(), IsDupOf(fd));

		// Verify that fds returns a duped version of the initial fd
		std::vector<int> fds = ExtractFdsFromCodec2SyncFence(fence);
		EXPECT_THAT(fds, ::testing::SizeIs(1));
		EXPECT_THAT(fds, ::testing::ElementsAre(IsDupOf(fd)));
		for (int fd_i : fds) {
		close(fd_i);
		}

		native_handle_t *handle = _C2FenceFactory::CreateNativeHandle(fence);
		EXPECT_THAT(handle, ::testing::NotNull());
		if (handle) {
		EXPECT_EQ(handle->numFds, 1);
		EXPECT_EQ(handle->numInts, 1);
		EXPECT_THAT(handle->data[0], IsDupOf(fd));
		EXPECT_EQ(handle->data[1], SYNC_FENCE_MAGIC);

		native_handle_close(handle);
		native_handle_delete(handle);
		}
		}

		TEST_F(C2FenceTest, UnorderedMultiSyncFence_with_one_valid_test_fd) {
		// Create a multi SyncFence with a single valid fd. This should create
		// a single fd sync fence. We can only validate this through its public
		// methods: fd/fds and verify the native handle ABI.

		int fd = memfd_create("test", 0 /* flags */);

		c2_status_t status = C2_BAD_VALUE;
		C2Fence fence = _C2FenceFactory::CreateUnorderedMultiSyncFence(
		{ -1, fd, -1 }, &status);
		// if we only have one valid fd, we are not merging fences, so the test fd is not validated
		EXPECT_EQ(status, C2_OK);

		validateSingleFdFence(fence, fd);
		}

		TEST_F(C2FenceTest, UnorderedMultiSyncFence_with_one_valid_test_fd_null_status) {
		// Create a multi SyncFence with a single valid fd. This should create
		// a single fd sync fence. We can only validate this through its public
		// methods: fd/fds and verify the native handle ABI.

		int fd = memfd_create("test", 0 /* flags */);

		C2Fence fence = _C2FenceFactory::CreateUnorderedMultiSyncFence(
		{ -1, fd, -1 });

		validateSingleFdFence(fence, fd);
		}

		TEST_F(C2FenceTest, UnorderedMultiSyncFence_with_merge_failure) {
		// Create a multi SyncFence with a multiple non-sync fence fds. This should
		// result in a fence created, but also an error.

		int fd1 = memfd_create("test1", 0 /* flags */);
		int fd2 = memfd_create("test2", 0 /* flags */);
		int fd3 = memfd_create("test3", 0 /* flags */);

		c2_status_t status = C2_BAD_VALUE;
		C2Fence fence = _C2FenceFactory::CreateUnorderedMultiSyncFence(
		{ fd1, fd2, fd3 }, &status);
		EXPECT_EQ(status, C2_CORRUPTED);

		validateThreeFdFence(fence, fd1, fd2, fd3);
		}

		TEST_F(C2FenceTest, UnorderedMultiSyncFence_with_merge_failure_null_status) {
		// Create a multi SyncFence with a multiple non-sync fence fds. This should
		// result in a fence created, but also an error.

		int fd1 = memfd_create("test1", 0 /* flags */);
		int fd2 = memfd_create("test2", 0 /* flags */);
		int fd3 = memfd_create("test3", 0 /* flags */);

		C2Fence fence = _C2FenceFactory::CreateUnorderedMultiSyncFence(
		{ fd1, fd2, fd3 });

		validateThreeFdFence(fence, fd1, fd2, fd3);
		}

		TEST_F(C2FenceTest, UnorderedMultiSyncFence_with_multiple_fds) {
		// We cannot create a true unordered multi sync fence as we can only
		// create test fds and those cannot be merged. As such, we cannot
		// test the factory method CreateUnorderedMultiSyncFence. We can however
		// create a test fence from a constructed native handle.

		// Technically, we need 3 fds as if we end up with only 2, we wouldn't
		// actually need a 2nd (final fence fd) since it is equivalent to the
		// first. In fact we will generate (and always generated) a single fd
		// fence in that case.
		int fd1 = memfd_create("test1", 0 /* flags */);
		int fd2 = memfd_create("test2", 0 /* flags */);
		int mergeFd = memfd_create("test3", 0 /* flags */);

		native_handle_t handle = native_handle_create(3 / numfds /, 1 / numints */);
		handle->data[0] = fd1;
		handle->data[1] = fd2;
		handle->data[2] = mergeFd;
		handle->data[3] = SYNC_FENCE_UNORDERED_MAGIC;
		C2Fence fence = _C2FenceFactory::CreateFromNativeHandle(handle, true /* takeOwnership */);
		native_handle_delete(handle);

		validateTwoFdUnorderedFence(fence, fd1, fd2, mergeFd);
		}

		void C2FenceTest::validateTwoFdUnorderedFence(
		const C2Fence &fence, int fd1, int fd2, int mergeFd) {
		// EXPECT_TRUE(fence.valid()); // need a valid sync fd to test this
		// EXPECT_TRUE(fence.ready());
		// Verify that the fence says it is a HW sync fence.
		EXPECT_TRUE(fence.isHW()); // FIXME this may be an implementation detail

		// Verify that the fd returned is a duped version of the merge fd
		base::unique_fd fenceFd{fence.fd()};
		EXPECT_THAT(fenceFd.get(), IsDupOf(mergeFd));

		// Verify that fds returns a duped versions of the initial fds (but not the merge fd)
		std::vector<int> fds = ExtractFdsFromCodec2SyncFence(fence);
		EXPECT_THAT(fds, ::testing::SizeIs(2));
		EXPECT_THAT(fds, ::testing::ElementsAre(IsDupOf(fd1), IsDupOf(fd2)));
		for (int fd_i : fds) {
		close(fd_i);
		}

		native_handle_t *handle = _C2FenceFactory::CreateNativeHandle(fence);
		EXPECT_THAT(handle, ::testing::NotNull());
		if (handle) {
		EXPECT_EQ(handle->numFds, 3);
		EXPECT_EQ(handle->numInts, 1);
		EXPECT_THAT(handle->data[0], IsDupOf(fd1));
		EXPECT_THAT(handle->data[1], IsDupOf(fd2));
		EXPECT_THAT(handle->data[2], IsDupOf(mergeFd));
		EXPECT_EQ(handle->data[3], SYNC_FENCE_UNORDERED_MAGIC);

		native_handle_close(handle);
		native_handle_delete(handle);
		}
		}

		TEST_F(C2FenceTest, MultiSyncFence_with_one_valid_test_fd) {
		// Create a multi SyncFence with a single valid fd. This should create
		// a single fd sync fence. We can only validate this through its public
		// methods: fd/fds and verify the native handle ABI.

		int fd = memfd_create("test", 0 /* flags */);

		c2_status_t status = C2_BAD_VALUE;
		C2Fence fence = _C2FenceFactory::CreateMultiSyncFence(
		{ -1, fd, -1 }, &status);
		// if we only have one valid fd, we are not merging fences, so the test fds are not validated
		EXPECT_EQ(status, C2_OK);

		validateSingleFdFence(fence, fd);
		}

		TEST_F(C2FenceTest, MultiSyncFence_with_one_valid_test_fd_null_status) {
		// Create a multi SyncFence with a single valid fd. This should create
		// a single fd sync fence. We can only validate this through its public
		// methods: fd/fds and verify the native handle ABI.

		int fd = memfd_create("test", 0 /* flags */);

		C2Fence fence = _C2FenceFactory::CreateMultiSyncFence(
		{ -1, fd, -1 });

		validateSingleFdFence(fence, fd);
		}

		TEST_F(C2FenceTest, MultiSyncFence_with_multiple_fds) {
		int fd1 = memfd_create("test1", 0 /* flags */);
		int fd2 = memfd_create("test2", 0 /* flags */);
		int fd3 = memfd_create("test3", 0 /* flags */);

		c2_status_t status = C2_BAD_VALUE;
		C2Fence fence = _C2FenceFactory::CreateMultiSyncFence(
		{ fd1, fd2, fd3 }, &status);
		// test fds are not validated
		EXPECT_EQ(status, C2_OK);

		validateThreeFdFence(fence, fd1, fd2, fd3);
		}

		void C2FenceTest::validateThreeFdFence(const C2Fence &fence, int fd1, int fd2, int fd3) {
		// EXPECT_TRUE(fence.valid()); // need a valid sync fd to test this
		// EXPECT_TRUE(fence.ready());
		// Verify that the fence says it is a HW sync fence.
		EXPECT_TRUE(fence.isHW()); // FIXME this may be an implementation detail

		// Verify that the fd returned is a duped version of the final fd
		base::unique_fd fenceFd{fence.fd()};
		EXPECT_THAT(fenceFd.get(), IsDupOf(fd3));

		// Verify that fds returns a duped versions of all 3 initial fds
		std::vector<int> fds = ExtractFdsFromCodec2SyncFence(fence);
		EXPECT_THAT(fds, ::testing::SizeIs(3));
		EXPECT_THAT(fds, ::testing::ElementsAre(IsDupOf(fd1), IsDupOf(fd2), IsDupOf(fd3)));
		for (int fd_i : fds) {
		close(fd_i);
		}

		native_handle_t *handle = _C2FenceFactory::CreateNativeHandle(fence);
		EXPECT_THAT(handle, ::testing::NotNull());
		if (handle) {
		EXPECT_EQ(handle->numFds, 3);
		EXPECT_EQ(handle->numInts, 1);
		EXPECT_THAT(handle->data[0], IsDupOf(fd1));
		EXPECT_THAT(handle->data[1], IsDupOf(fd2));
		EXPECT_THAT(handle->data[2], IsDupOf(fd3));
		EXPECT_EQ(handle->data[3], SYNC_FENCE_MAGIC);

		native_handle_close(handle);
		native_handle_delete(handle);
		}
		}

		TEST_F(C2FenceTest, BackwardCompat_UDC_sync_fence) {
		// Create a single SyncFence from a UDC native handle

		int fd = memfd_create("test", 0 /* flags */);

		native_handle_t handle = native_handle_create(1 / numfds /, 1 / numints */);
		handle->data[0] = fd;
		handle->data[1] = SYNC_FENCE_DEPRECATED_MAGIC;
		C2Fence fence = _C2FenceFactory::CreateFromNativeHandle(handle, true /* takeOwnership */);
		native_handle_delete(handle);

		validateSingleFdFence(fence, fd);
		}

		TEST_F(C2FenceTest, BackwardCompat_24Q1_single_fd_fence) {
		// Create a single SyncFence from a 24Q1 native handle
		// This had the same (albeit separately duped) fd twice, and used the legacy
		// magic number.

		int fd = memfd_create("test", 0 /* flags */);

		native_handle_t handle = native_handle_create(2 / numfds /, 1 / numints */);
		handle->data[0] = fd;
		handle->data[1] = dup(fd);
		handle->data[2] = SYNC_FENCE_DEPRECATED_MAGIC;
		C2Fence fence = _C2FenceFactory::CreateFromNativeHandle(handle, true /* takeOwnership */);
		native_handle_delete(handle);

		validateSingleFdFence(fence, fd);
		}

		TEST_F(C2FenceTest, BackwardCompat_24Q3_single_fd_fence) {
		// Create a single SyncFence from the defined native handle

		int fd = memfd_create("test", 0 /* flags */);

		native_handle_t handle = native_handle_create(1 / numfds /, 1 / numints */);
		handle->data[0] = fd;
		handle->data[1] = SYNC_FENCE_MAGIC;
		C2Fence fence = _C2FenceFactory::CreateFromNativeHandle(handle, true /* takeOwnership */);
		native_handle_delete(handle);

		validateSingleFdFence(fence, fd);
		}

		TEST_F(C2FenceTest, BackwardCompat_24Q1_multi_fd_fence) {
		// Create a single SyncFence from a 24Q1 era native handle with
		// the legacy magic number.

		int fd1 = memfd_create("test1", 0 /* flags */);
		int fd2 = memfd_create("test2", 0 /* flags */);
		int mergeFd = memfd_create("test3", 0 /* flags */);

		native_handle_t handle = native_handle_create(3 / numfds /, 1 / numints */);
		handle->data[0] = fd1;
		handle->data[1] = fd2;
		handle->data[2] = mergeFd;
		handle->data[3] = SYNC_FENCE_DEPRECATED_MAGIC;
		C2Fence fence = _C2FenceFactory::CreateFromNativeHandle(handle, true /* takeOwnership */);
		native_handle_delete(handle);

		validateTwoFdUnorderedFence(fence, fd1, fd2, mergeFd);
		}

		// No need to create BackwardCompat_24Q3_unordered_multi_fd_fence because
		// we are creating that fence already from the 24Q3 native handle layout
		// in the UnorderedMultiSyncFence_with_multiple_fds test.

		TEST_F(C2FenceTest, BackwardCompat_24Q3_multi_fd_fence) {
		// Create a single SyncFence from a 24Q1 era native handle with
		// the legacy magic number.

		int fd1 = memfd_create("test1", 0 /* flags */);
		int fd2 = memfd_create("test2", 0 /* flags */);
		int fd3 = memfd_create("test3", 0 /* flags */);

		native_handle_t handle = native_handle_create(3 / numfds /, 1 / numints */);
		handle->data[0] = fd1;
		handle->data[1] = fd2;
		handle->data[2] = fd3;
		handle->data[3] = SYNC_FENCE_MAGIC;
		C2Fence fence = _C2FenceFactory::CreateFromNativeHandle(handle, true /* takeOwnership */);
		native_handle_delete(handle);

		validateThreeFdFence(fence, fd1, fd2, fd3);
		}

		} // namespace android

media/codec2/vndk/C2Fence.cpp

+340 −73

File changed.

Preview size limit exceeded, changes collapsed.

media/codec2/vndk/include/C2FenceFactory.h

+82 −15

Original line number	Diff line number	Diff line
		@@ -23,13 +23,19 @@
		#include <android-base/unique_fd.h>

		/*
		* Create a list of fds from fence
		* Extract a list of sync fence fds from a potentially multi-sync C2Fence.
		* This will return dupped file descriptors of the fences used to creating the
		* sync fence. Specifically, for an unordered mult-sync fence, the merged
		* singular fence will not be returned even though it is created aspart of
		* constructing the C2Fence object. On the other hand, for a single fd sync
		* fence, the returned list will contain the sole file descriptor.
		*
		* \param fence C2Fence object from which associated
		* file descriptors need to be extracted
		* \return a vector of fds otherwise return vector of size 0
		* \return a vector of sync fence fds. This will be a vector of size 0 if C2Fence
		* is not a sync fence. The caller is responsible for closing the
		* fds in the returned vector.
		*/

		std::vector<int> ExtractFdsFromCodec2SyncFence(const C2Fence& fence);

		class C2SurfaceSyncMemory;
		@@ -54,20 +60,76 @@ struct _C2FenceFactory {
		uint32_t waitId);

		/*
		* Create C2Fence from a fence file fd.
		* Create C2Fence from a sync fence fd.
		*
		* \param fenceFd Fence file descriptor.
		* \param fenceFd Sync fence file descriptor.
		* It will be owned and closed by the returned fence object.
		* \param validate If true, the fence fd will be validated to ensure
		* it is a valid pending sync fence fd.
		*/
		static C2Fence CreateSyncFence(int fenceFd);
		static C2Fence CreateSyncFence(int fenceFd, bool validate = true);

		/*
		* Create C2Fence from list of fence file fds.
		* Create C2Fence from list of sync fence fds, while also merging them to
		* create a singular fence, which can be used as a backward compatible sync
		* fence.
		*
		* \param fenceFds Vector of file descriptor for fence.
		* It will be owned and closed by the returned fence object.
		* \param fenceFds Vector of sync fence file descriptors.
		* All file descriptors will be owned (and closed) by
		* the returned fence object.
		*/
		static C2Fence CreateMultipleFdSyncFence(const std::vector<int>& fenceFds);
		[[deprecated("Use CreateUnorderedMultiSyncFence instead.")]]
		static C2Fence CreateMultipleFdSyncFence(const std::vector<int>& fenceFds) {
		return CreateUnorderedMultiSyncFence(fenceFds);
		}

		/*
		* Create C2Fence from a list of unordered sync fence fds, while also merging
		* them to create a singular fence, which can be used as a backward compatible
		* sync fence.
		*
		* \param fenceFds Vector of sync fence file descriptors.
		* All file descriptors will be owned (and closed) by
		* the returned fence object.
		* \param status Optional pointer to a status field. If not null, it will be
		* updated with the status of the operation. Possible values
		* are:
		* - C2_OK: The operation succeeded.
		* - C2_NO_MEMORY: The operation failed because of lack of
		* memory.
		* - C2_CORRUPTED: The operation failed because the sync
		* fence fds could bot be merged.
		* \return A C2Fence object representing the sync fence fds, or
		* an empty C2Fence if the no C2Fence could be created.
		* It is possible for the operation to fail but still return
		* a possibly viable C2Fence object, e.g. if the merge
		* operation failed only partially. Similarly, it is possible
		* for the operation to succeed but still return an empty
		* C2Fence object, e.g. if all fence fds were invalid.
		*/
		static C2Fence CreateUnorderedMultiSyncFence(
		const std::vector<int>& fenceFds, c2_status_t status = nullptr / nullable */);

		/*
		* Create C2Fence from a list of sync fence fds. Waiting for the last fence
		* must guarantee that all other fences are also signaled.
		*
		* \param fenceFds Vector of sync fence file descriptors.
		* All file descriptors will be owned (and closed) by
		* the returned fence object.
		* \param status Optional pointer to a status field. If not null, it will be
		* updated with the status of the operation. Possible values
		* are:
		* - C2_OK: The operation succeeded.
		* - C2_NO_MEMORY: The operation failed because of lack of
		* memory.
		* \return A C2Fence object representing the sync fence fds, or
		* an empty C2Fence if the operation failed. It is possible
		* for the operation to succeed but still return an empty
		* C2Fence object, e.g. if all fence fds were invalid.
		*/
		static C2Fence CreateMultiSyncFence(
		const std::vector<int>& fenceFds, c2_status_t status = nullptr / nullable */);

		/*
		* Create C2Fence from an fd created by pipe()/pipe2() syscall.
		@@ -97,13 +159,18 @@ struct _C2FenceFactory {

		/*
		* Create C2Fence from a native handle.

		*
		* \param handle A native handle representing a fence
		* The fd in the native handle will be duplicated, so the caller will
		* still own the handle and have to close it.
		* \param takeOwnership If true, the native handle and the file descriptors
		* within will be owned by the returned fence object.
		* If false (default), the caller will still own the
		* handle and its file descriptors and will have to
		* close it.
		* In either case the caller is responsible for
		* deleting the native handle.
		*/
		static C2Fence CreateFromNativeHandle(const native_handle_t* handle);
		static C2Fence CreateFromNativeHandle(
		const native_handle_t* handle, bool takeOwnership = false);
		};


		#endif // STAGEFRIGHT_CODEC2_FENCE_FACTORY_H_