1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef HARDWARE_GOOGLE_CAMERA_HAL_UTILS_HWL_BUFFER_ALLOCATOR_H 18 #define HARDWARE_GOOGLE_CAMERA_HAL_UTILS_HWL_BUFFER_ALLOCATOR_H 19 20 #include "camera_buffer_allocator_hwl.h" 21 #include "camera_device_session_hwl.h" 22 #include "hal_buffer_allocator.h" 23 24 #include <hardware/gralloc1.h> 25 #include <utils/Errors.h> 26 #include <vector> 27 28 namespace android { 29 namespace google_camera_hal { 30 31 // Implement IHalBufferAllocator to allocate/free buffers from HWL allocator 32 // This allocator can be created from device session where it knows the instance 33 // of HWL allocator implementation 34 class HwlBufferAllocator : IHalBufferAllocator { 35 public: 36 // Creates HwlBuffer and allocate buffers 37 static std::unique_ptr<IHalBufferAllocator> Create( 38 CameraBufferAllocatorHwl* camera_buffer_allocator_hwl); 39 40 virtual ~HwlBufferAllocator() = default; 41 42 // Allocate buffers and return buffer via buffers. 43 // The buffers is owned by caller 44 status_t AllocateBuffers(const HalBufferDescriptor& buffer_descriptor, 45 std::vector<buffer_handle_t>* buffers) override; 46 47 void FreeBuffers(std::vector<buffer_handle_t>* buffers) override; 48 49 protected: 50 HwlBufferAllocator() = default; 51 52 private: 53 status_t Initialize(CameraBufferAllocatorHwl* camera_buffer_allocator_hwl); 54 55 // Do not support the copy constructor or assignment operator 56 HwlBufferAllocator(const HwlBufferAllocator&) = delete; 57 HwlBufferAllocator& operator=(const HwlBufferAllocator&) = delete; 58 59 CameraBufferAllocatorHwl* camera_buffer_allocator_hwl_ = nullptr; 60 61 uint64_t id_ = 0; 62 static std::atomic<uint64_t> global_instance_count_; 63 }; 64 65 } // namespace google_camera_hal 66 } // namespace android 67 68 #endif // HARDWARE_GOOGLE_CAMERA_HAL_UTILS_HWL_BUFFER_ALLOCATOR_H 69