1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef HOS_CAMERA_V4L2_BUFFER_H 17 #define HOS_CAMERA_V4L2_BUFFER_H 18 19 #include <mutex> 20 #include <map> 21 #include <cstring> 22 #include <linux/videodev2.h> 23 #include <sys/ioctl.h> 24 #include "v4l2_common.h" 25 #if defined(V4L2_UTEST) || defined (V4L2_MAIN_TEST) 26 #include "v4l2_temp.h" 27 #else 28 #include <stream.h> 29 #include <camera.h> 30 #endif 31 32 namespace OHOS::Camera { 33 struct AdapterBuff { 34 void* start; 35 uint32_t length; 36 uint32_t offset; 37 void* userBufPtr; 38 int32_t heapfd; 39 int32_t dmafd; 40 }; 41 class HosV4L2Buffers { 42 public: 43 HosV4L2Buffers(enum v4l2_memory memType, enum v4l2_buf_type bufferType); 44 ~HosV4L2Buffers(); 45 46 RetCode V4L2ReqBuffers(int fd, int unsigned buffCont); 47 RetCode V4L2ReleaseBuffers(int fd); 48 49 RetCode V4L2QueueBuffer(int fd, const std::shared_ptr<FrameSpec>& frameSpec); 50 RetCode V4L2DequeueBuffer(int fd); 51 52 RetCode V4L2AllocBuffer(int fd, const std::shared_ptr<FrameSpec>& frameSpec); 53 54 void SetCallback(BufCallback cb); 55 56 RetCode Flush(int fd); 57 58 private: 59 RetCode SetAdapterBuffer(int fd, struct v4l2_buffer &buf, const std::shared_ptr<FrameSpec>& frameSpec); 60 RetCode SetDmabufOn(struct v4l2_buffer &buf, const std::shared_ptr<FrameSpec>& frameSpec); 61 void MakeInqueueBuffer(struct v4l2_buffer &buf, const std::shared_ptr<FrameSpec>& frameSpec); 62 void SetInqueueBuffer(struct v4l2_buffer &buf, const std::shared_ptr<FrameSpec>& frameSpec); 63 void SetMmapInqueueBuffer(struct v4l2_buffer &buf, const std::shared_ptr<FrameSpec>& frameSpec); 64 void SetDmaInqueueBuffer(struct v4l2_buffer &buf, const std::shared_ptr<FrameSpec>& frameSpec); 65 66 private: 67 BufCallback dequeueBuffer_; 68 69 using FrameMap = std::map<unsigned int, std::shared_ptr<FrameSpec>>; 70 std::map<int, FrameMap> queueBuffers_; 71 72 using AdapterBuffer = struct AdapterBuff; 73 std::map<uint32_t, AdapterBuffer> adapterBufferMap_; 74 75 std::mutex bufferLock_; 76 77 enum v4l2_memory memoryType_; 78 enum v4l2_buf_type bufferType_; 79 }; 80 } // namespace OHOS::Camera 81 #endif // HOS_CAMERA_V4L2_BUFFER_H 82