90 lines
3.3 KiB
C++
90 lines
3.3 KiB
C++
/*
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* Copyright (C) 2014-2017 Intel Corporation
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* Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef CAMERA3_HAL_MEDIACONTROLLER_H_
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#define CAMERA3_HAL_MEDIACONTROLLER_H_
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#include <map>
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#include <string>
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#include <vector>
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#include <memory>
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#include <linux/media.h>
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#include <utils/Errors.h>
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#include "MediaCtlPipeConfig.h"
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NAMESPACE_DECLARATION {
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class MediaEntity;
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/**
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* \class MediaController
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*
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* This class is used for discovering and configuring the internal topology
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* of a media device. Devices are modelled as an oriented graph of building
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* blocks called media entities. The media entities are connected to each other
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* through pads.
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*
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* Each media entity corresponds to a V4L2 subdevice. This class is also used
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* for configuring the V4L2 subdevices.
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*/
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class MediaController
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{
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public:
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explicit MediaController(const char *path);
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~MediaController();
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status_t init();
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status_t getMediaEntity(std::shared_ptr<MediaEntity> &entity, const char* name);
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status_t resetLinks();
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status_t configureLink(const MediaCtlLinkParams &linkParams);
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status_t setFormat(const MediaCtlFormatParams &formatParams);
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status_t setSelection(const char* entityName, int pad, int target, int top, int left, int width, int height);
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status_t setControl(const char* entityName, int controlId, int value, const char *controlName);
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status_t getSinkNamesForEntity(std::shared_ptr<MediaEntity> mediaEntity, std::vector<std::string> &names);
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status_t getMediaDevInfo(media_device_info &info);
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status_t enqueueMediaRequest(uint32_t mediaRequestId);
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status_t findMediaEntityById(int index, struct media_entity_desc &mediaEntityDesc);
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status_t findMediaEntityByName(char* name, struct media_entity_desc &mediaEntityDesc);
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private:
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status_t open();
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status_t close();
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int xioctl(int request, void *arg) const;
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status_t getDeviceInfo();
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status_t findEntities();
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status_t getEntityNameForId(unsigned int entityId, std::string &entityName) const;
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status_t enumLinks(struct media_links_enum &linkInfo);
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status_t setupLink(struct media_link_desc &linkDesc);
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private:
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std::string mPath; /*!< path to device in file system, ex: /dev/media0 */
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int mFd; /*!< file descriptor obtained when device is open */
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media_device_info mDeviceInfo; /*!< media controller device info */
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/*!< media entity descriptors, Key: entity name */
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std::map<std::string, struct media_entity_desc> mEntityDesciptors;
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std::map<uint32_t, struct media_entity_desc> mEntityIdDesciptors;
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/*!< MediaEntities, Key: entity name */
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std::map<std::string, std::shared_ptr<MediaEntity>> mEntities;
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}; // class MediaController
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} NAMESPACE_DECLARATION_END
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#endif
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