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 class HosV4L2Buffers { 34 public: 35 HosV4L2Buffers(enum v4l2_memory memType, enum v4l2_buf_type bufferType); 36 ~HosV4L2Buffers(); 37 38 RetCode V4L2ReqBuffers(int fd, int unsigned buffCont); 39 RetCode V4L2ReleaseBuffers(int fd); 40 41 RetCode V4L2QueueBuffer(int fd, const std::shared_ptr<FrameSpec>& frameSpec); 42 RetCode V4L2DequeueBuffer(int fd); 43 44 RetCode V4L2AllocBuffer(int fd, const std::shared_ptr<FrameSpec>& frameSpec); 45 46 void SetCallback(BufCallback cb); 47 48 RetCode Flush(int fd); 49 50 private: 51 BufCallback dequeueBuffer_; 52 53 using FrameMap = std::map<unsigned int, std::shared_ptr<FrameSpec>>; 54 std::map<int, FrameMap> queueBuffers_; 55 56 std::mutex bufferLock_; 57 58 enum v4l2_memory memoryType_; 59 enum v4l2_buf_type bufferType_; 60 }; 61 } // namespace OHOS::Camera 62 #endif // HOS_CAMERA_V4L2_BUFFER_H 63