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/*
* Copyright (C) 2017 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.
*/
#pragma once
#include <utils/NativeHandle.h>
#include <memory>
#include <string>
#include <unordered_set>
#include <utility>
namespace android {
class IGrallocHalWrapper;
// Reference: hardware/interfaces/graphics/mapper/2.0/vts/functional/
class GrallocWrapper {
public:
GrallocWrapper();
~GrallocWrapper();
// After constructing this object, this function must be called to check the result. If it
// returns false, other methods are not safe to call.
bool isInitialized() const { return (mGrallocHal != nullptr); };
// Allocates a gralloc buffer suitable for direct channel sensors usage with the given size.
// The buffer should be freed using freeBuffer when it's not needed anymore; otherwise it'll
// be freed when this object is destroyed.
// Returns a handle to the buffer, and a CPU-accessible pointer for reading. On failure, both
// will be set to nullptr.
std::pair<native_handle_t*, void*> allocate(uint32_t size);
// Releases a gralloc buffer previously returned by allocate()
void freeBuffer(native_handle_t* bufferHandle);
private:
std::unique_ptr<IGrallocHalWrapper> mGrallocHal;
// Keep track of all cloned and imported handles. When a test fails with
// ASSERT_*, the destructor will free the handles for the test.
std::unordered_set<native_handle_t*> mAllocatedBuffers;
};
} // namespace android
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