CN115567518B - Device, system and method for reorienting camera of cloud desktop - Google Patents
Device, system and method for reorienting camera of cloud desktop Download PDFInfo
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- CN115567518B CN115567518B CN202211554052.4A CN202211554052A CN115567518B CN 115567518 B CN115567518 B CN 115567518B CN 202211554052 A CN202211554052 A CN 202211554052A CN 115567518 B CN115567518 B CN 115567518B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/08—Protocols specially adapted for terminal emulation, e.g. Telnet
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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Abstract
The invention belongs to the technical field of desktop cloud, and discloses a device, a system and a method for reorienting a camera of a cloud desktop. The invention establishes an independent virtual camera channel between a server and a client based on a remote desktop protocol; in an independent virtual camera channel, information intercommunication between a cloud desktop virtual machine and a client is realized in an agent mode, a virtual camera matched with a local camera connected with a non-USB is configured at a server through data interaction, and image information of the local camera connected with the non-USB is acquired in a request mode by using the virtual camera, so that redirection of the camera connected with the non-USB is realized. In addition, in the data transmission process, the local image is compressed and decompressed through the streaming media compression module and the streaming media decompression module respectively, so that the network flow is greatly reduced, and the problem that a virtual camera channel is blocked due to the large data flow transmitted reversely by the local camera can be solved.
Description
Technical Field
The invention relates to the technical field of desktop cloud, in particular to a device, a system and a method for reorienting a camera of a cloud desktop.
Background
The cloud desktop is a technology for running a virtual machine in a data center and pulling a running picture of the virtual machine to a local client for displaying and operating through a remote desktop protocol. When a user uses the cloud desktop, a local camera of the user is generally used, but because the virtual machine runs in a remote data center, a local client is generally in an intranet of the user (such as a WIFI intranet of a home), the virtual machine and the user network cannot communicate, and the camera of the user client cannot be directly used. It is common practice for a USB camera to redirect a USB connected camera on a local client to a remote virtual machine for use through a USB redirection technique of a remote desktop protocol. However, this mechanism cannot use a camera connected to a terminal such as a mobile phone without USB connection. In addition, due to the particularity of the camera, the flow transmitted to the virtual machine in the reverse direction is very large through the camera of the USB redirection mechanism, for example, the data volume transmitted per second exceeds several hundred M, which directly causes the remote desktop protocol channel to be blocked, and affects the normal use of the cloud desktop. In view of this, the present application is specifically made.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the existing USB redirection technology can not redirect a non-USB connected camera of a client to a virtual machine of a remote server for use, and aims to provide a device, a system and a method for redirecting the camera of a cloud desktop.
The invention is realized by the following technical scheme: in one aspect, the invention provides a camera reorientation device for a cloud desktop, comprising a virtual camera channel, a client and a server, wherein the virtual camera channel is used for providing camera image data transmission service between a cloud desktop virtual machine and the client, and is based on a remote desktop transmission protocol; the server-side agent is used for generating a client-side camera searching notice, sending the client-side camera searching notice to the client-side agent through the virtual camera channel, and creating a virtual camera according to the physical parameters of the local camera sent by the client-side agent; the client agent is used for searching the physical parameters of the local camera according to the client camera searching notification, sending the physical parameters to the server agent through the virtual camera channel, and calling the local camera according to the image transmission request sent by the virtual camera; and the local camera is used for sending the local image to the server through the virtual camera channel.
Furthermore, the camera reorientation device also comprises a streaming media compression module, which is used for compressing the local image at the client and sending the compressed data to the server through the virtual camera channel; and the streaming media decompression module is used for decompressing the received compressed data at the server and sending the decompressed data to the virtual camera.
Further, the server agent is also used for monitoring whether the connection between the user at the client and the virtual machine at the server is successful; the client agent is also used for sending an image transmission request to the server side through the virtual camera channel before sending the local image.
On the other hand, the invention provides a system for redirecting the camera of the cloud desktop, which is based on the device for redirecting the camera and comprises a protocol connection module, a server and a server agent, wherein the protocol connection module is used for connecting a client to the server according to a remote desktop protocol and sending a connection success message to the server agent; the application program management module is used for opening an application program of which a user needs to use the camera in the virtual desktop and starting the application program of which the camera needs to be used; the virtual camera management module is used for calling a virtual camera according to the requirement of the application program and controlling the virtual camera to send an image transmission request to the client agent through a virtual camera channel; the first request receiving module is used for receiving an image transmission request sent by the virtual camera and sending a request receiving success message to the client agent; the local camera is used for sending a local image to the streaming media compression module through the virtual camera channel; and the streaming media compression module is used for compressing the local image and sending the compressed data to the server through the virtual camera channel.
Furthermore, the system also comprises an image transceiving module, which is used for receiving the compressed data sent by the streaming media compression module and sending the compressed data to the streaming media decompression module; the streaming media decompression module is used for decompressing the compressed data and sending the decompressed data to the virtual camera.
Further, the virtual camera management module is further configured to control the virtual camera to send the decompressed data to an application program that needs to use the camera.
In another aspect, the present invention provides a method for camera reorientation of a cloud desktop, comprising the steps of: s1: logging in a remote virtual machine through a desktop transmission protocol, and connecting a client agent with a server agent through an independent camera virtual channel; s2: generating a client camera searching notification by using a server agent, and sending the client camera searching notification to the client agent through a virtual camera channel; s3: searching physical parameters of a local camera by using the client agent according to the client camera searching notification, and sending the physical parameters to the server agent through the virtual camera channel; s4: creating a virtual camera by using a server agent according to the physical parameters; s5: starting an application program needing to use a camera, calling a virtual camera according to the requirement of the application program, and controlling the virtual camera to send an image transmission request to a client agent through a virtual camera channel; s6: calling a local camera to send a local image to a streaming media compression module by using a client agent according to an image transmission request sent by the virtual camera; s7: and compressing the local image by using a streaming media compression module, and sending the compressed data to a server through a virtual camera channel.
Further, S1 may also include the following steps: and connecting the client with the server through a remote desktop protocol.
Further, the method also comprises the following steps: s8: decompressing the compressed data by using a streaming media decompression module, and sending the decompressed data to a virtual camera through a virtual camera channel; s9: and sending the decompressed data to the application program through the virtual camera.
Compared with the prior art, the invention has the following advantages and beneficial effects: 1. an independent virtual camera channel is established between a server side and a client side based on a remote desktop protocol; in an independent virtual camera channel, information intercommunication between a cloud desktop virtual machine and a client is realized in an agent mode, a virtual camera matched with a local camera connected with a non-USB is configured at a server through data interaction, and image information of the local camera connected with the non-USB is acquired in a request mode by using the virtual camera, so that redirection of the camera connected with the non-USB is realized. 2. In the data transmission process, the local image is compressed and decompressed through the streaming media compression module and the streaming media decompression module respectively, so that the network flow is greatly reduced, and the problem that a virtual camera channel is blocked due to the fact that the data flow reversely transmitted by a local camera is large can be solved.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that those skilled in the art may also derive other related drawings based on these drawings without inventive effort.
Fig. 1 is a schematic structural diagram of an apparatus for reorienting a camera on a cloud desktop according to embodiment 1 of the present invention; fig. 2 is a schematic structural diagram of a system for redirecting a camera on a cloud desktop according to embodiment 2 of the present invention; fig. 3 is a schematic flowchart of a method for redirecting a camera on a cloud desktop according to embodiment 3 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and the accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limiting the present invention.
Example 1: aiming at the problem that the existing USB redirection technology cannot redirect a non-USB connected camera of a client to a virtual machine of a remote server for use, the embodiment provides an apparatus for redirecting a camera of a cloud desktop as shown in fig. 1, which includes the following parts: the virtual camera channel is used for providing camera image data transmission service between the cloud desktop virtual machine and the client, and is an independent virtual channel based on a remote desktop transmission protocol; the server agent is used for generating a client camera searching notice, sending the client camera searching notice to the client agent through a virtual camera channel, creating a virtual camera according to physical parameters of a local camera sent by the client agent, and monitoring whether a user at the client is successfully connected with a virtual machine at the server; the client proxy is used for searching the physical parameters of the local camera according to the client camera searching notification, sending the physical parameters to the server proxy through the virtual camera channel, calling the local camera according to the image transmission request sent by the virtual camera, and sending the image transmission request to the server through the virtual camera channel before sending the local image; the local camera is used for sending a local image to the server through the virtual camera channel; the streaming media compression module is used for compressing a local image at a client and sending compressed data to a server through a virtual camera channel; and the streaming media decompression module is used for decompressing the received compressed data at the server and sending the decompressed data to the virtual camera.
The working principle and process of the above-mentioned device for reorienting the camera of the cloud desktop are described as follows: since the server runs in a remote data center and the local client is usually in the intranet of the user (e.g., a WIFI intranet of a home), the server cannot communicate with the user, so that the server cannot directly use the camera of the user. Aiming at the USB camera, a USB redirection technology of a remote desktop protocol is generally adopted at present, and the camera connected with a local USB is redirected to a remote server for use, so that the problem that a virtual machine cannot directly use a user camera is solved. However, for a camera on a terminal such as a mobile phone or a tablet, since the camera cannot be connected to a client host using a USB, the conventional USB redirection technology cannot redirect the camera to a server.
Therefore, in this embodiment, a virtual camera is created at the server, where the virtual camera and a local non-USB connected camera are in a one-to-one correspondence relationship (corresponding to physical parameters), and an independent virtual camera channel based on a remote desktop protocol is established, so that the virtual camera communicates with the non-USB connected local camera, the virtual camera acquires image data that is the same as that of the non-USB connected local camera, and then provides the acquired image data for an application program at the server to use, thereby implementing redirection of the non-USB connected camera. In addition, the present embodiment adopts a mode of creating an agent at the server and the client respectively to implement two-party communication. Meanwhile, considering that the flow rate of data reversely transmitted by the camera is very large (for example, the data volume transmitted per second exceeds several hundred M) and the virtual camera channel of the remote desktop protocol is blocked, the normal use of the cloud desktop is affected, the embodiment also adopts the data compression and decompression technology based on the streaming media, and the network flow rate is greatly reduced.
The working principle and the process of the device for reorienting the camera of the cloud desktop are as follows: 1. when the client and the server are successfully connected through the remote desktop protocol, the server agent informs the client to search the physical parameters of the camera connected with the local non-USB through the independent virtual camera channel. 2. After the client agent finds the physical parameters of the camera connected with the local non-USB, the found physical parameters are reported to the server agent working at the server through the virtual camera channel. The physical parameters include, but are not limited to, camera resolution, frame rate, etc. 3. And the server agent creates a virtual camera corresponding to the parameters according to the received physical parameters. 4. When a user opens an application program (such as an Tencent meeting, a WeChat video and the like) needing to use the camera, the application program calls the virtual camera to request the non-USB connected camera of the client to send a local image. 5. After receiving the request, the client agent opens a camera in non-USB connection, simultaneously sends a message requesting image transmission to the server, and sends the local image to the streaming media compression module for local image compression; after the compression is finished, the streaming media compression module transmits the compressed data to the server side through the data channel. 6. After the server receives the compressed data, the streaming media decompression module decompresses the compressed data and sends the decompressed data to the called application program.
Through the working processes 1-6, the redirection of local (including a camera connected with a USB and a camera connected with a non-USB) is completed, and the problem that a virtual camera channel is blocked due to large data flow transmitted reversely by the local camera is solved.
Example 2: the embodiment also aims at the problem that the existing USB redirection technology cannot redirect a non-USB connected camera of a client to a virtual machine of a remote server for use, and provides a system for redirecting a camera of a cloud desktop as shown in fig. 2, where the system is based on the camera redirecting device of embodiment 1, and includes the following parts: the protocol connection module is used for connecting the client to the server according to the remote desktop protocol and sending a connection success message to the server agent; the application program management module is used for opening an application program of which a user needs to use the camera in the virtual desktop and starting the application program of which the camera needs to be used; the virtual camera management module is used for calling a virtual camera according to the requirement of the application program, controlling the virtual camera to send an image transmission request to the client agent through a virtual camera channel, and controlling the virtual camera to send decompressed data to the application program needing to use the camera; the local camera is used for sending a local image to the streaming media compression module through the virtual camera channel; the streaming media compression module is used for compressing the local image and sending the compressed data to the server through the virtual camera channel; the image transceiving module is used for receiving the compressed data sent by the streaming media compression module and sending the compressed data to the streaming media decompression module; the streaming media decompression module is used for decompressing the compressed data and sending the decompressed data to the virtual camera.
The working process of the system is as follows: 1. and when the protocol connection module acquires a connection request of a user, connecting the client to the server according to the remote desktop protocol, and sending a connection success message to the camera redirection device. 2. After receiving the connection success message sent by the protocol connection module, the camera redirection device automatically executes the processes 1 to 3 in the embodiment 1, and completes the creation of the virtual camera. 3. When the user issues an instruction of an application program needing to use the camera, the application program management module starts the corresponding application program. 4. After the application program is started, the virtual camera management module calls a virtual camera according to the requirement of the application program and controls the virtual camera to send an image transmission request to the client agent through a virtual camera channel of the camera redirection device. 5. And after receiving the image transmission request, the client agent opens the non-USB connected camera and simultaneously sends a message requesting image transmission to the server. 6. The local camera sends the local image to a streaming media compression module for local image compression; after the compression is finished, the streaming media compression module transmits the compressed data to the server side through the data channel. 7. The image receiving and sending module receives the compressed data sent by the streaming media compression module and sends the compressed data to the streaming media decompression module. 8. The streaming media decompression module decompresses the compressed data and sends the decompressed data to the virtual camera, and the virtual camera receives the decompressed original streaming media data and sends the decompressed original streaming media data to the called application program.
Example 3: corresponding to embodiment 2, this embodiment provides a method for reorienting a camera of a cloud desktop as described in fig. 3, including the following steps: s0: and logging in the remote virtual machine through a desktop transmission protocol. S1: and connecting the client agent with the server agent through an independent camera virtual channel. S2: and monitoring whether the connection between the user and the virtual machine is successful or not by using the server agent, if so, generating a client camera searching notice by using the server agent, and sending the client camera searching notice to the client agent through a virtual camera channel. S3: and searching the physical parameters of the local camera by using the client agent according to the client camera searching notice, and sending the physical parameters to the server agent through the virtual camera channel. S4: and creating a virtual camera by using the server agent according to the physical parameters. S5: and starting an application program needing to use the camera, calling the virtual camera according to the requirement of the application program, and controlling the virtual camera to send an image transmission request to the client agent through a virtual camera channel. S6: and calling the local camera to send the local image to the streaming media compression module by using the client agent according to the image transmission request sent by the virtual camera. S7: and compressing the local image by using a streaming media compression module, sending an image transmission request to the server side by using a client agent through the virtual camera channel, and if the request is corresponding, sending the compressed data to the server side through the virtual camera channel. S8: and decompressing the compressed data by using the streaming media decompression module, and sending the decompressed data to the virtual camera through the virtual camera channel. S9: and sending the decompressed data to the application program through the virtual camera.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A camera reorientation device for a cloud desktop is characterized by comprising a virtual camera channel, a virtual server and a client, wherein the virtual camera channel is used for providing camera image data transmission service between a cloud desktop virtual machine and the client, and is based on a remote desktop transmission protocol; the server agent is used for generating a client camera searching notice, sending the client camera searching notice to the client agent through a virtual camera channel, and creating a virtual camera according to the physical parameters of the local camera sent by the client agent; the client agent is used for searching the physical parameters of the local camera according to the client camera searching notification, sending the physical parameters to the server agent through the virtual camera channel, and calling the local camera according to the image transmission request sent by the virtual camera; and the local camera is used for sending the local image to the server through the virtual camera channel.
2. The device for redirecting the camera of the cloud desktop according to claim 1, further comprising a streaming media compression module, configured to compress a local image at a client, and send compressed data to a server through a virtual camera channel; and the streaming media decompression module is used for decompressing the received compressed data at the server side and sending the decompressed data to the virtual camera.
3. The apparatus of claim 2, wherein the server agent is further configured to monitor whether the user at the client connects successfully with the virtual machine at the server; the client agent is also used for sending an image transmission request to a server side through the virtual camera channel before sending the local image.
4. A system for cloud desktop camera reorientation, characterized in that the system comprises the apparatus for cloud desktop camera reorientation of any of claims 1-3, and the system further comprises: the protocol connection module is used for connecting the client to the server according to the remote desktop protocol and sending a connection success message to the server agent; the application program management module is used for opening an application program of which a user needs to use the camera in the virtual desktop and starting the application program of which the camera needs to be used; the virtual camera management module is used for calling a virtual camera according to the requirement of the application program and controlling the virtual camera to send an image transmission request to the client agent through a virtual camera channel; the local camera is used for sending a local image to the streaming media compression module through the virtual camera channel; and the streaming media compression module is used for compressing the local image and sending the compressed data to the server through the virtual camera channel.
5. The system for camera reorientation of a cloud desktop according to claim 4, further comprising: the image transceiving module is used for receiving the compressed data sent by the streaming media compression module and sending the compressed data to the streaming media decompression module; the streaming media decompression module is used for decompressing the compressed data and sending the decompressed data to the virtual camera.
6. The system for camera redirection on a cloud desktop as claimed in claim 5, wherein the virtual camera management module is further configured to control the virtual camera to send the decompressed data to the application program that needs to use the camera.
7. A method for camera reorientation of a cloud desktop, comprising the steps of: s1: logging in a remote virtual machine through a desktop transmission protocol, and connecting a client agent with a server agent through an independent camera virtual channel; s2: generating a client camera searching notification by using a server agent, and sending the client camera searching notification to the client agent through a virtual camera channel; s3: searching physical parameters of a local camera by using the client agent according to the client camera searching notification, and sending the physical parameters to the server agent through the virtual camera channel; s4: creating a virtual camera by using a server agent according to the physical parameters; s5: starting an application program needing to use a camera, calling a virtual camera according to the requirement of the application program, and controlling the virtual camera to send an image transmission request to a client agent through a virtual camera channel; s6: calling a local camera to send a local image to a streaming media compression module by using a client agent according to an image transmission request sent by the virtual camera; s7: and compressing the local image by using a streaming media compression module, and sending the compressed data to a server through a virtual camera channel.
8. The method for camera reorientation of a cloud desktop according to claim 7, wherein the S2 further comprises the steps of: monitoring whether the connection between the user and the virtual machine is successful or not by using a server agent; the S7 further comprises the following steps: before sending the compressed data to the server, sending an image transmission request to the server through the virtual camera channel by using the client agent.
9. The method for camera reorientation of a cloud desktop according to claim 7 or 8, characterized by further comprising the steps of: s8: decompressing the compressed data by using a streaming media decompression module, and sending the decompressed data to a virtual camera through a virtual camera channel; s9: and sending the decompressed data to the application program through the virtual camera.
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