CN113825000A - Screen projection method and device, electronic equipment and storage medium - Google Patents
Screen projection method and device, electronic equipment and storage medium Download PDFInfo
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- CN113825000A CN113825000A CN202111101547.7A CN202111101547A CN113825000A CN 113825000 A CN113825000 A CN 113825000A CN 202111101547 A CN202111101547 A CN 202111101547A CN 113825000 A CN113825000 A CN 113825000A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/432—Content retrieval operation from a local storage medium, e.g. hard-disk
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
- H04N21/4436—Power management, e.g. shutting down unused components of the receiver
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- General Engineering & Computer Science (AREA)
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The embodiment of the invention provides a screen projection method, a screen projection device, electronic equipment and a storage medium, wherein the screen projection method comprises the following steps: starting a monitoring service, and searching online equipment; searching whether effective equipment information of the equipment is cached locally or not aiming at each searched online equipment; wherein the device information includes: an equipment identity mark; under the condition that effective equipment information of the equipment is locally cached, acquiring the equipment information of the equipment from the local cache; under the condition that effective equipment information of equipment is not cached locally, an equipment description file set of the equipment is obtained; analyzing the equipment description file set to obtain equipment information, and caching the equipment information locally; screening screen projection equipment according to the searched equipment information of each equipment; selecting target screen projection equipment from the searched screen projection equipment, and carrying out target video projection; and after the target screen projection equipment is selected, closing the monitoring service. The screen projection method provided by the embodiment of the invention can save the power consumption of screen projection.
Description
Technical Field
The present invention relates to the field of video processing technologies, and in particular, to a screen projection method and apparatus, an electronic device, and a storage medium.
Background
The video screen projection is a mode of synchronizing videos played on electronic equipment such as a mobile phone, a tablet, a computer and the like to another equipment for playing and watching in a screen projection mode. For example: when the video C is played through the video application program B installed on the mobile phone A, if a user wants to project a screen on the device B, the screen projection connection between the device A and the device B can be established, and the video C is projected on the device B, so that the user can watch the video C more flexibly.
When the video screen projection improves the user's experience of watching the film, there are also following drawbacks: before selecting the screen projection equipment and in the video screen projection process, the video application program in the screen projection initiator electronic equipment needs to frequently search the screen projection equipment, and needs to download and analyze the equipment description file of the screen projection equipment after searching the screen projection equipment each time, so that the power consumption of a screen projection module is large, and the endurance time of the electronic equipment is influenced.
Therefore, the technical problem to be solved by the technical personnel in the field is that the screen projection module consumes a large amount of power when the video is projected.
Disclosure of Invention
The embodiment of the invention aims to provide a screen projection method to reduce the power consumption of a screen projection module. The specific technical scheme is as follows:
in a first aspect of the present invention, there is provided a screen projection method, including: starting a monitoring service, and searching online equipment; searching whether effective equipment information of the equipment is cached locally or not aiming at each searched online equipment; wherein the device information includes: an equipment identity mark; under the condition that valid device information of the device is locally cached, acquiring the device information of the device from a local cache; under the condition that valid device information of the device is not cached locally, obtaining a device description file set of the device; analyzing the equipment description file set to obtain equipment information, and locally caching the equipment information; screening screen projection equipment according to the searched equipment information of each equipment; selecting target screen projection equipment from the searched screen projection equipment, and carrying out target video projection; and after the target screen projection equipment is selected, closing the monitoring service.
Optionally, the device information further includes a device discovery timestamp, and the step of finding, for each searched online device, whether valid device information of the device is cached locally includes: aiming at each searched online device, searching whether the device information of the device is cached locally; and under the condition that the equipment information of the equipment is locally cached, judging whether the equipment information is valid or not according to an equipment discovery timestamp contained in the equipment information.
Optionally, the device information further includes a device discovery timestamp, and the step of finding, for each searched online device, whether valid device information of the device is cached locally includes: aiming at each searched online device, searching whether the device information of the device is cached locally; under the condition that the device information of the device is locally cached, judging whether the device information is valid according to an information state identifier contained in the device information, wherein the information state identifier comprises: a first identifier for indicating that the device information is valid and a second identifier for indicating that the device information is invalid; aiming at each piece of locally cached equipment information, judging whether the equipment information is valid or not by a system every preset time according to an equipment discovery timestamp contained in the equipment information; and in the case of detecting invalid device information, replacing the information state identification of the device information by a second identification from the first identification.
Optionally, the step of determining whether the device information is valid according to the device discovery timestamp included in the device information includes: reading a device discovery timestamp from the device information; detecting a time interval of the device discovery timestamp and a current system time; determining the equipment information to be invalid equipment information under the condition that the time interval is greater than a preset value; and determining the equipment information to be effective equipment information under the condition that the time interval is smaller than or equal to the preset value.
Optionally, the step of selecting a target screen projection device from the searched screen projection devices to perform target video projection includes: selecting target screen projection equipment from the searched screen projection equipment according to a preset rule; sending an authentication request to a video cloud server; after receiving an authentication passing message returned by the video cloud server, acquiring a video playing address acquired from the video cloud server; and releasing the target video under the video playing address on the target screen releasing equipment.
Optionally, the step of launching the target video at the video playing address on the target screen launching device includes: monitoring the local playing state of the target video in the process of releasing the target video under the video playing address through the target screen releasing device; polling the playing progress of the target video on the target screen projection equipment at a first time interval under the condition that the target video is played in a local foreground; polling the playing progress of the target video on the target screen projection equipment at a second time interval under the condition that the target video is played in a local background; wherein the first time interval is less than the second time interval.
Optionally, after the step of selecting a target screen projection device from the searched screen projection devices and performing target video projection, the method further includes: sending heartbeat check information to the target screen projection equipment according to a third preset time interval; and receiving a heartbeat message returned by the target screen projection equipment, wherein the heartbeat message is used for detecting whether the target screen projection equipment is off-line or not.
In a second aspect of the present invention, there is also provided a screen projection apparatus, wherein the apparatus includes: the first starting module is used for starting the monitoring service and searching the online equipment; the searching module is used for searching whether effective equipment information of the equipment is cached locally or not aiming at each searched online equipment; wherein the device information includes: an equipment identity mark; a first obtaining module, configured to obtain, from a local cache, device information of the device when valid device information of the device is locally cached; a second obtaining module, configured to obtain a device description file set of the device under a condition that valid device information of the device is not cached locally; the first analysis module is used for analyzing the equipment description file set to obtain equipment information and locally caching the equipment information; the screening module is used for screening the screen projection equipment according to the searched equipment information of each equipment; the releasing module is used for selecting target screen throwing equipment from the searched screen throwing equipment and releasing a target video; and the closing module is used for closing the monitoring service after the target screen projection equipment is selected.
Optionally, the device information further includes a device discovery timestamp, and the lookup module includes: the first submodule is used for searching whether the equipment information of the equipment is cached locally or not aiming at each searched online equipment; and the second sub-module is used for judging whether the equipment information is valid or not according to the equipment discovery timestamp contained in the equipment information under the condition that the equipment information of the equipment is cached locally.
Optionally, the device information further includes a device discovery timestamp, and the lookup module includes: the third sub-module is used for searching whether the equipment information of the equipment is cached locally or not aiming at each searched online equipment; a fourth sub-module, configured to, when device information of the device is locally cached, determine whether the device information is valid according to an information status identifier included in the device information, where the information status identifier includes: a first identifier for indicating that the device information is valid and a second identifier for indicating that the device information is invalid; aiming at each piece of locally cached equipment information, judging whether the equipment information is valid or not by a system every preset time according to an equipment discovery timestamp contained in the equipment information; and in the case of detecting invalid device information, replacing the information state identification of the device information by a second identification from the first identification. Optionally, the second sub-module comprises: a first unit configured to read a device discovery timestamp from the device information; a second unit for detecting a time interval of the device discovery timestamp and a current system time; a third unit, configured to determine that the device information is invalid device information when the time interval is greater than a preset value; a fourth unit, configured to determine that the device information is valid device information when the time interval is less than or equal to the preset value.
Optionally, the delivery module includes: the fifth sub-module is used for selecting target screen projection equipment from the searched screen projection equipment according to a preset rule; the sixth submodule is used for sending an authentication request to the video cloud server; the seventh sub-module is used for acquiring a video playing address from the video cloud server after receiving the authentication passing message returned by the video cloud server; and the eighth submodule is used for launching the target video under the video playing address on the target screen launching equipment.
Optionally, the eighth sub-module is specifically configured to: monitoring the release state of the target screen release equipment in the process of releasing the target video under the video playing address through the target screen release equipment; polling the playing progress of the target video on the target screen projection equipment at intervals of a first time interval under the condition that the target screen projection equipment projects the target video on a foreground; polling the playing progress of the target video on the target screen projection equipment at intervals of a second time interval under the condition that the target screen projection equipment projects the target video in the background; wherein the first time interval is less than the second time interval.
Optionally, the apparatus further comprises: the heartbeat detection module is used for selecting target screen projection equipment from the searched screen projection equipment in the projection module, and sending heartbeat check messages to the target screen projection equipment according to a third preset time interval after target video projection is carried out; and the message receiving module is used for receiving a heartbeat message returned by the target screen projection equipment, wherein the heartbeat message is used for detecting whether the target screen projection equipment is off-line or not.
In yet another aspect of the present invention, there is also provided a computer-readable storage medium having stored therein instructions, which when run on a computer, cause the computer to execute any of the above-mentioned screen projection methods.
In yet another aspect of the present invention, there is also provided a computer program product containing instructions which, when run on a computer, cause the computer to perform any of the above-described screen projection methods.
According to the screen projection scheme provided by the embodiment of the invention, on one hand, the monitoring service needs to consume electric quantity for searching the screen projection equipment and acquiring and analyzing the equipment description file set of the screen projection equipment, and the monitoring service is closed after the target screen projection equipment is selected, so that compared with the situation that the monitoring service is always started in the whole screen projection process, the power consumption can be saved; on the other hand, after the online device is searched, whether effective device information of the online device is cached locally or not is searched, if the effective device information exists, the device information is obtained without consuming time and power and analyzing the device description file set, and power consumption can be saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a flowchart illustrating steps of a screen projection method according to an embodiment of the present invention;
fig. 2 is a block diagram of a projection device according to an embodiment of the present invention;
fig. 3 is a block diagram of an electronic device in an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.
According to the embodiment of the invention, the monitoring service is closed in time after the target screen projection equipment is selected, and the analyzed equipment information of the screen projection equipment is locally cached, so that the power consumption of screen projection can be saved.
Fig. 1 is a flowchart illustrating steps of a screen projection method according to an embodiment of the present invention. The screen projection method shown in fig. 1 is applied to an electronic device.
As shown in fig. 1, a screen projection method according to an embodiment of the present invention may include the following steps:
step 101: and starting the monitoring service and searching for the online equipment.
The screen projection method provided by the embodiment of the invention is suitable for DLNA screen projection. In the existing DLNA screen projection scheme, when searching for a screen projection device that is online, an SSDP (Simple Service Discovery Protocol) monitoring Service is started to periodically send a query multicast message, and a multicast packet sent by an in-network device is monitored. In the actual application process, besides screen projection devices such as televisions and boxes, routers supporting a Universal Plug and Play (Plug and Play) function and computers supporting a UPnP function in a local area network environment also send multicast packets after receiving query multicast messages, so that a monitoring service receives a large number of SSDP multicast packets, acquires the SSDP multicast packets each time, acquires an equipment description file set of equipment sending the SSDP multicast packets, and analyzes the equipment description file set to obtain equipment information of the equipment. The inventor of the application discovers after analyzing the existing DLNA screen throwing scheme, equipment can frequently drop and get on the line under the environment of a weak network, the existing DLNA screen throwing scheme processes the opening state all the time, the monitoring service can frequently receive the SSDP multicast packet, the equipment information of the equipment on the line is analyzed, and the power consumption is high. In view of the above problems in the existing DLNA screen projection scheme, in the embodiment of the present invention, the service flow marked in the DLNA is optimized and modified, and the monitoring service is timely turned off after the target screen projection device is determined, so that the screen projection requirement can be met and the power consumption of the monitoring service can be reduced to the maximum extent. For the service flow labeled in the DLNA after optimization and modification, steps 101 to 107 in the embodiment of the present invention are shown.
Step 102: and searching whether valid device information of the device is cached locally or not aiming at each searched device.
And aiming at the cached equipment information of each piece of equipment, when the cached equipment information is effective, the file does not need to be analyzed every time the equipment on-line information is monitored, and after the equipment information is monitored to be invalid, the equipment description file set is downloaded and analyzed when the equipment is monitored to be on-line again.
The criterion for determining whether the device information is valid or not can be flexibly set by those skilled in the art, for example: and setting a device discovery time stamp in the device information, and judging whether the device information is valid or not based on the device discovery time stamp. For another example: and setting an information state identifier in the equipment information, and representing whether the equipment information is effective or not through the information state identifier. After the system finds the locally cached device information, whether the device information is valid can be judged according to the corresponding parameters contained in the device information. It should be noted that, in the actual implementation process, not only the device information of the screen projection device is cached locally, but also the device information of other devices searched by the monitoring service may be cached.
Since all the searched devices are not screen projection devices, the monitoring service determines whether the device is a screen projection device according to the device information after searching the online device, for example: and judging whether the equipment is screen projection equipment or not according to the equipment name, the equipment type, the service marked by the equipment and the like contained in the equipment information. The device information can be obtained only by downloading and analyzing the device description file set, and if the device is searched to be on-line, the device description file set is downloaded and analyzed, so that the time consumption is long and the power consumption is high.
The device may be a DLNA device and the format of the device description file set may be xml.
In the existing screen projection scheme, the system monitors that the equipment is online through the monitoring service every time, the equipment description file set of the online equipment is downloaded and analyzed, and the equipment is frequently online and offline due to a heartbeat mechanism in a weak network environment, so that the system needs to frequently download and analyze the equipment description file set of the online equipment, and the power consumption is high. In the embodiment of the invention, the device information analyzed by the history is cached locally, whether the device information of the device is stored locally is judged after the online device is monitored every time, and if yes, the device description file set of the device is not required to be downloaded and analyzed in a time-consuming and power-consuming manner. Step 103: and under the condition that the effective equipment information of the equipment is not cached locally, acquiring an equipment description file set of the screen projection equipment.
And acquiring the equipment information of the equipment from the local cache under the condition that the effective equipment information of the equipment is locally cached. Because the effective device information of the device is locally cached, the device information of the device can be directly obtained from the local cache, and the device description file set of the device does not need to be downloaded and analyzed in a time-consuming and power-consuming manner, so that the device information of the device is obtained.
Valid device information for local uncached devices includes, but is not limited to: the device information of the device is not cached locally, and the locally cached device information of the device is invalid.
Under the condition that the searched effective device information of the online device is not locally cached, the device description file set of the device needs to be downloaded and analyzed, so that the device information of the device is obtained, and the identity of the device is added to the device list.
Step 104: and analyzing the equipment description file set to obtain equipment information, and caching the equipment information locally.
Wherein the device information includes: the device identification and the device discovery timestamp are parameters for judging whether the local cache device information is valid or not. The device identity may include, but is not limited to: device name, vendor information, IP address, port number, uuid (universal Unique Identifier), etc. The device type can be determined by at least one of the device name, the vendor information and the uuid in the device identity information, for example: a router, a computer or a mobile phone, etc., so as to determine whether the searched equipment is screen projection equipment. A screen-cast connection with the device may be established via an IP address, port number, etc.
Step 105: and screening the screen projection equipment according to the searched equipment information of each equipment.
In the actual implementation process, the identity identifiers in the searched device information of each device can be analyzed to determine the device type of the device, and whether the device is a screen projection device is judged based on the device type.
Step 106: and selecting target screen projection equipment from the searched screen projection equipment to carry out target video projection.
If a plurality of screen projection devices are searched, one screen projection device can be selected as a target screen projection device according to a preset rule. For example: the preset rule can be set as random selection, can also be set as selection of the screen projection equipment with the highest historical use frequency, can also be set as preferential selection of the preset screen projection equipment and the like. This is not particularly limited in the embodiments of the present invention.
After the target screen projection equipment is selected, a special mark can be added to the identity of the target screen projection equipment in a locally stored equipment screen projection list, and the special mark represents that the screen projection equipment is selected currently. After the target screen projection device is selected, a target video playing URL (Uniform Resource Locator) address is obtained after authentication of the video cloud server, and a film pushing instruction is sent to the target screen projection device so as to carry out video projection on the target screen projection device.
In the video delivery process, the electronic device may further perform interactive message with the target screen delivery device, for example: receiving play control instructions such as play, pause, fast forward, fast backward, volume adjustment and the like which are sent by a user, sending the received play control instructions to target screen projection equipment, and controlling the projected video on the target screen projection equipment.
In the actual implementation process, after the target screen projection device is selected from the searched screen projection devices and the target video is projected, the following steps can be further executed:
the method comprises the following steps: sending a subscription message to the target screen projection equipment according to a fourth preset time interval;
and after the subscription message is sent to the target screen projection equipment, the target screen projection equipment sends the equipment state notification to the application program playing the video at present through a subscription channel. And after the target screen projection device detects that the subscription of the application program of the currently played video is not overtime and the state changes, the device state notification is sent. The fourth preset time interval can be set by a person skilled in the art according to actual needs, and is not particularly limited in the embodiment of the present invention.
Step two: and receiving a device state notification returned by the target screen projection device.
The device state notification is used for detecting whether the target screen projection device is off-line or not. And if the device state notification returned by the target screen projection device is received, determining that the target screen projection device is offline. And under the condition that the target screen projection equipment is detected to be offline, the upper screen projection equipment and the lower screen projection equipment are required to be selected again for video projection.
The online condition of the target screen throwing device is detected through the subscription message, and the offline of the target screen throwing device can be found in time.
Step 107: and after the target screen projection equipment is selected, closing the monitoring service.
After the monitoring service is closed, the sending of the query multicast message is stopped, so that the multicast message sent by the online equipment can not be monitored. After the monitoring service is closed, if the fact that the target screen throwing device is off-line is detected, the on-line screen throwing device needs to be searched again, the monitoring service is started again, and compared with the existing screen throwing scheme that the monitoring service is started all the time in the video throwing process, the power consumption of the monitoring service can be reduced.
In the embodiment of the invention, according to the screen projection scheme provided by the embodiment of the invention, on one hand, the monitoring service searches for the screen projection equipment and acquires and analyzes the equipment description file set of the screen projection equipment, and the power consumption is consumed; on the other hand, after the online device is searched, whether effective device information of the online device is cached locally or not is searched, if the effective device information exists, the device information is obtained without consuming time and power and analyzing the device description file set, and power consumption can be saved.
In an optional embodiment, the following device information management process may also be performed, specifically including the following steps:
the method comprises the following steps: aiming at each piece of equipment information cached locally, judging whether the equipment information is valid or not by the system every preset time according to an equipment discovery timestamp contained in the equipment information;
for the specific way of determining whether the device information is valid according to the device discovery timestamp, a person skilled in the art may set the specific way according to actual needs, which is not specifically limited in this optional embodiment. The preset time period can be flexibly set by a person skilled in the art, for example: set to 10 minutes, 15 minutes, etc.
Step two: and under the condition that invalid equipment information is detected, replacing an information state identifier of the equipment information by a first identifier to a second identifier, wherein the information state identifier is a parameter which is contained in the equipment information and used for indicating whether the equipment is valid, the first identifier is used for indicating that the equipment information is valid, and the second identifier and the parameter are used for indicating that the equipment information is invalid.
In the optional mode, the polling mechanism is set to judge the validity of the equipment information every preset time, so that the reliability of the locally cached equipment information can be improved. In addition, whether the device information is valid or not is determined by determining the device discovery timestamp included in the device information, the amount of calculation is small, and the determination result is accurate.
Based on the above polling determination and the manner of adaptively modifying the information state identifier of the locally cached device information, for each searched online device, a manner of finding whether valid device information of the device is locally cached may be as follows:
firstly, aiming at each searched online device, searching whether the device information of the device is cached locally;
secondly, under the condition that the equipment information of the equipment is locally cached, whether the equipment information is valid is judged according to the information state identification contained in the equipment information.
Specifically, when the information state identifier is a first identifier, determining that the device information is valid; and when the information state identifier is the second identifier, determining that the equipment information is invalid.
The mode of optionally judging whether the equipment information is effective or not based on the information state identification in the equipment information has small calculation amount and short consumed time.
In an optional embodiment, for each searched online device, the manner of finding whether valid device information of the device is cached locally may also be as follows:
firstly, aiming at each searched online device, searching whether the device information of the device is cached locally;
if the local device information of the device is cached, determining that the local device information of the device is not cached.
Secondly, under the condition that the device information of the device is locally cached, whether the device information is valid is judged according to the device discovery timestamp contained in the device information.
The specific judgment rule for judging whether the device information is valid based on the device discovery timestamp may be set by a person skilled in the art according to actual needs, and is not particularly limited in the embodiment of the present invention. For example: setting the discovery timestamp to be earlier than a preset time point, and judging that the equipment information is invalid; for another example: and if the time interval between the discovery timestamp and the current system time is greater than a preset value, judging that the equipment information is invalid and the like.
The mode of optionally judging whether the equipment information is valid or not based on the equipment discovery timestamp contained in the equipment information is more flexible in the setting of the judgment rule.
In an optional embodiment, for each piece of locally cached device information, according to the device discovery timestamp included in the device information, the manner of determining whether the device information is valid may be as follows:
firstly, aiming at each piece of locally cached equipment information, reading an equipment discovery timestamp contained in the equipment information;
secondly, detecting the time interval between the time stamp and the current system time by the equipment;
finally, determining the equipment information as invalid equipment information under the condition that the time interval is greater than a preset value; and under the condition that the time interval is smaller than or equal to the preset value, determining the equipment information as effective equipment information.
The preset value can be set by a person skilled in the art according to actual requirements, which is not specifically limited in the embodiment of the present invention, for example: the preset value may be set to 60 minutes, 30 minutes, 20 minutes, or the like. Furthermore, the decision mechanism may be initiated in advance of a certain time period, for example, the certain time period may be set to 90 seconds, 120 seconds, 150 seconds, or the like.
Taking the preset value of 60 minutes and the specific time length of 90 seconds as an example, an exemplary judgment condition setting procedure is as follows: now _ time > found _ time + 3600-90; TRUE-current device information is valid; FALSE-current device information is invalid.
And when the device information is detected to be invalid, the device discovery timestamp in the locally cached device information is overtime. When the listening service is started again, the device is listened to acquire the device information of the device again, and the device discovery time stamp is updated.
The mode of optionally judging the validity of the equipment information is accurate and has small calculation amount.
In an optional embodiment, selecting a target screen projection device from the searched screen projection devices, and performing target video projection includes:
firstly, selecting target screen projection equipment from searched screen projection equipment according to a preset rule;
secondly, sending an authentication request to a video cloud server;
the authentication request is used for requesting the video cloud server to authenticate the application program of the video to be played currently on the electronic equipment.
Thirdly, after receiving an authentication passing message returned by the video cloud server, acquiring a video playing address acquired from the video cloud server;
if the authentication is not passed, the video playing address cannot be acquired from the video cloud server.
And finally, delivering the target video under the video playing address on the target screen delivery equipment.
The optional target video delivery mode can prevent the video playing address in the video cloud server from being illegally acquired.
In the release process, due to the requirements of continuous playing and the head and tail of the skip, the electronic equipment needs to send the progress acquisition message at regular time so as to synchronize the video playing progress of the target screen release equipment. Each time the acquisition progress message is sent, power consumption is consumed, so how to reduce power consumption on the basis of ensuring the synchronization of the video playing progress is a problem that needs to be solved urgently by a person skilled in the art. In an optional embodiment, a video playing progress synchronization method is shown, including:
firstly, monitoring the local playing state of a target video in the process of releasing the target video under the video playing address through target screen releasing equipment;
secondly, polling the playing progress of the target video on the target screen projection equipment at a first time interval under the condition that the target video is played on a local foreground;
thirdly, polling the playing progress of the target video on the target screen projection equipment at a second time interval under the condition that the target video is played in a local background;
the target video is played in the local background, which indicates that the user is very likely not to watch the video, so that the polling interval can be properly increased, and the power consumption of polling is saved.
In an optional embodiment, it may be further determined whether the target screen-projecting device establishes a screen-projecting relationship with other devices, for example: the target screen projection device is a mobile phone, the other devices are televisions or projectors, and the like, if the target screen projection device is not in screen projection relation with the other devices, the target screen projection device can detect that the target video is polled at a second time interval under the condition that the target video is played in the background of the target screen projection device. If the target screen projection device and other devices establish a screen projection relationship, a user is quite likely to watch the target video through other devices such as a television or a projector and the like which establish the screen projection relationship with the target screen projection device, and therefore even if the target video is detected to be played in the background of the target screen projection device, the playing progress of the target video is polled at first time intervals. The optional mode for polling the playing progress of the target video can save the power consumption of the playing progress of the polling target video under the condition of ensuring the watching experience of a user.
The first time interval is smaller than the second time interval, the first time interval may be set to 1 second, 1.5 seconds, or 2 seconds, etc., and the second time interval may be set to 5 seconds, 6 seconds, or 10 seconds, etc., and specific values of the first time interval and the second time interval are not limited in the embodiment of the present invention.
The mode of flexibly adjusting the polling time interval of the playing progress optionally according to the playing state of the target video in the local can save the power consumption of polling.
In an optional embodiment, after selecting a target screen projection device from the searched screen projection devices and performing target video projection, the method further includes the following heartbeat check process, which specifically includes the following steps:
the method comprises the following steps: sending heartbeat check information to the target screen projection equipment according to a third preset time interval;
the third preset time interval may be set by a person skilled in the art according to actual needs, and is not particularly limited in the embodiments of the present application. For example: 1 second, 2 seconds, or 5 seconds, etc.
Step two: and receiving a heartbeat message returned by the target screen projection equipment.
The heartbeat message is used for detecting whether the target screen projection equipment is off-line or not. If the heartbeat message returned by the target screen projection equipment is received within a fifth preset time interval after the heartbeat check message is sent, determining that the target screen projection equipment is not offline after the heartbeat check is not overtime; otherwise, determining that the target screen projection equipment which is overtime in heartbeat check is offline.
After the target screen projection device is determined to be offline, the identity of the target screen projection device is deleted from the screen projection device list, but the locally cached device information of the target screen projection device is reserved. And after the target screen projection equipment is detected to be off-line, the monitoring service needs to be restarted to monitor the on-line screen projection equipment.
According to the mode of checking whether the target screen projection equipment is offline through heartbeat, the target screen projection equipment can be checked to be offline more timely compared with the mode of inquiring whether the target screen projection equipment is offline through subscription information.
Fig. 2 is a block diagram of a projection device according to an embodiment of the present invention. The screen projection device shown in fig. 2 is provided in an electronic apparatus.
As shown in fig. 2, the screen projection device may include the following modules:
a first starting module 201, configured to start a monitoring service and search for an online device;
the searching module 202 is configured to search, for each searched online device, whether valid device information of the device is cached locally; wherein the device information includes: an equipment identity mark;
a first obtaining module 203, configured to obtain the device information of the device from a local cache in a case that valid device information of the device is cached locally;
a second obtaining module 204, configured to obtain a device description file set of the device under a condition that valid device information of the device is not cached locally;
a first parsing module 205, configured to parse the device description file set to obtain device information, and locally cache the device information;
the screening module 206 is configured to screen out the screen projection devices according to the searched device information of each device; the releasing module is used for selecting target screen throwing equipment from the searched screen throwing equipment and releasing a target video; and the closing module is used for closing the monitoring service after the target screen projection equipment is selected.
Optionally, the device information further includes a device discovery timestamp, and the lookup module includes:
the first submodule is used for searching whether the equipment information of the equipment is cached locally or not aiming at each searched online equipment;
and the second sub-module is used for judging whether the equipment information is valid or not according to the equipment discovery timestamp contained in the equipment information under the condition that the equipment information of the equipment is cached locally.
Optionally, the device information further includes a device discovery timestamp, and the lookup module includes:
the third sub-module is used for searching whether the equipment information of the equipment is cached locally or not aiming at each searched online equipment;
a fourth sub-module, configured to, when device information of the device is locally cached, determine whether the device information is valid according to an information status identifier included in the device information, where the information status identifier includes: a first identifier for indicating that the device information is valid and a second identifier for indicating that the device information is invalid;
aiming at each piece of locally cached equipment information, judging whether the equipment information is valid or not by a system every preset time according to an equipment discovery timestamp contained in the equipment information; and in the case of detecting invalid device information, replacing the information state identification of the device information by a second identification from the first identification. Optionally, the second sub-module comprises:
a first unit configured to read a device discovery timestamp from the device information;
a second unit for detecting a time interval of the device discovery timestamp and a current system time;
a third unit, configured to determine that the device information is invalid device information when the time interval is greater than a preset value;
a fourth unit, configured to determine that the device information is valid device information when the time interval is less than or equal to the preset value.
Optionally, the delivery module includes:
the fifth sub-module is used for selecting target screen projection equipment from the searched screen projection equipment according to a preset rule;
the sixth submodule is used for sending an authentication request to the video cloud server;
the seventh sub-module is used for acquiring a video playing address from the video cloud server after receiving the authentication passing message returned by the video cloud server;
and the eighth submodule is used for launching the target video under the video playing address on the target screen launching equipment.
Optionally, the eighth sub-module is specifically configured to:
monitoring the local playing state of the target video in the process of releasing the target video under the video playing address through the target screen releasing device;
polling the playing progress of the target video on the target screen projection equipment at a first time interval under the condition that the target video is played in a local foreground;
polling the playing progress of the target video on the target screen projection equipment at a second time interval under the condition that the target video is played in a local background;
wherein the first time interval is less than the second time interval.
Optionally, the apparatus further comprises:
the heartbeat detection module is used for selecting target screen projection equipment from the searched screen projection equipment in the projection module, and sending heartbeat check messages to the target screen projection equipment according to a third preset time interval after target video projection is carried out;
and the message receiving module is used for receiving a heartbeat message returned by the target screen projection equipment, wherein the heartbeat message is used for detecting whether the target screen projection equipment is off-line or not.
In the embodiment of the application, on one hand, the monitoring service needs to consume electric quantity for searching the screen projection equipment and acquiring and analyzing the equipment description file set of the screen projection equipment, and the monitoring service is closed after the target screen projection equipment is selected, so that the electric consumption can be saved compared with the situation that the monitoring service is always started in the whole screen projection process; on the other hand, after the online device is searched, whether effective device information of the online device is cached locally or not is searched, if the effective device information exists, the device information is obtained without consuming time and power and analyzing the device description file set, and power consumption can be saved.
The embodiment of the present invention further provides an electronic device, as shown in fig. 3, which includes a processor 301, a communication interface 302, a memory 303, and a communication bus 304, where the processor 301, the communication interface 302, and the memory 303 complete mutual communication through the communication bus 304,
a memory 303 for storing a computer program;
the processor 301, when executing the program stored in the memory 303, implements the following steps:
starting a monitoring service, and searching online equipment;
searching whether effective equipment information of the equipment is cached locally or not aiming at each searched online equipment; wherein the device information includes: an equipment identity mark;
under the condition that valid device information of the device is locally cached, acquiring the device information of the device from a local cache;
under the condition that valid device information of the device is not cached locally, obtaining a device description file set of the device;
analyzing the equipment description file set to obtain equipment information, and locally caching the equipment information;
screening screen projection equipment according to the searched equipment information of each equipment;
selecting target screen projection equipment from the searched screen projection equipment, and carrying out target video projection;
and after the target screen projection equipment is selected, closing the monitoring service.
Optionally, when the device information includes a device discovery timestamp, and the processor searches for, for each searched online device, whether valid device information of the device is cached locally, the processor is specifically configured to:
aiming at each searched online device, searching whether the device information of the device is cached locally;
and under the condition that the equipment information of the equipment is locally cached, judging whether the equipment information is valid or not according to an equipment discovery timestamp contained in the equipment information.
Optionally, when the device information includes a device discovery timestamp, and the processor searches for, for each searched online device, whether valid device information of the device is cached locally, the processor is specifically configured to:
aiming at each searched online device, searching whether the device information of the device is cached locally;
under the condition that the device information of the device is locally cached, judging whether the device information is valid according to an information state identifier contained in the device information, wherein the information state identifier comprises: a first identifier for indicating that the device information is valid and a second identifier for indicating that the device information is invalid;
the method comprises the steps that for each piece of locally cached equipment information, a processor judges whether the equipment information is valid or not at intervals of preset time according to an equipment discovery timestamp contained in the equipment information; and in the case of detecting invalid device information, replacing the information state identification of the device information by a second identification from the first identification.
Optionally, when the processor determines whether the device information is valid according to the device discovery timestamp included in the device information, the processor is specifically configured to:
reading a device discovery timestamp from the device information;
detecting a time interval of the device discovery timestamp and a current system time;
determining the equipment information to be invalid equipment information under the condition that the time interval is greater than a preset value;
and determining the equipment information to be effective information under the condition that the time interval is smaller than or equal to the preset value.
Optionally, the processor selects a target screen projection device from the searched screen projection devices, and when performing target video projection, the processor is specifically configured to:
selecting target screen projection equipment from the searched screen projection equipment according to a preset rule;
sending an authentication request to a video cloud server;
after receiving an authentication passing message returned by the video cloud server, acquiring a video playing address acquired from the video cloud server;
and releasing the target video under the video playing address on the target screen releasing equipment.
Optionally, when the target video at the video playing address is released on the target screen release device, the processor is specifically configured to:
monitoring the local playing state of the target video in the process of releasing the target video under the video playing address through the target screen releasing device;
polling the playing progress of the target video on the target screen projection equipment at a first time interval under the condition that the target video is played in a local foreground;
polling the playing progress of the target video on the target screen projection equipment at a second time interval under the condition that the target video is played in a local background;
wherein the first time interval is less than the second time interval.
Optionally, the processor further performs the following steps after selecting a target screen projection device from the searched screen projection devices and performing target video projection:
sending heartbeat check information to the target screen projection equipment according to a third preset time interval;
and receiving a heartbeat message returned by the target screen projection equipment, wherein the heartbeat message is used for detecting whether the target screen projection equipment is off-line or not.
The communication bus mentioned in the above terminal may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the terminal and other equipment.
The Memory may include a Random Access Memory (RAM) or a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
In yet another embodiment of the present invention, a computer-readable storage medium is further provided, which has instructions stored therein, and when the computer-readable storage medium runs on a computer, the computer is caused to execute the screen projection method in any one of the above embodiments.
In yet another embodiment, a computer program product containing instructions is provided, which when run on a computer, causes the computer to perform the screen projection method described in any of the above embodiments.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A method of screen projection, the method comprising:
starting a monitoring service, and searching online equipment;
searching whether effective equipment information of the equipment is cached locally or not aiming at each searched online equipment; wherein the device information includes: an equipment identity mark;
under the condition that valid device information of the device is locally cached, acquiring the device information of the device from a local cache;
under the condition that valid device information of the device is not cached locally, obtaining a device description file set of the device;
analyzing the equipment description file set to obtain equipment information, and locally caching the equipment information;
screening screen projection equipment according to the searched equipment information of each equipment;
selecting target screen projection equipment from the searched screen projection equipment, and carrying out target video projection;
and after the target screen projection equipment is selected, closing the monitoring service.
2. The method of claim 1, wherein the device information further includes a device discovery timestamp, and the step of finding whether valid device information of the device is cached locally for each searched online device comprises:
aiming at each searched online device, searching whether the device information of the device is cached locally;
and under the condition that the equipment information of the equipment is locally cached, judging whether the equipment information is valid or not according to an equipment discovery timestamp contained in the equipment information.
3. The method of claim 1, wherein the device information further includes a device discovery timestamp, and the step of finding whether valid device information of the device is cached locally for each searched online device comprises:
aiming at each searched online device, searching whether the device information of the device is cached locally;
under the condition that the device information of the device is locally cached, judging whether the device information is valid according to an information state identifier contained in the device information, wherein the information state identifier comprises: a first identifier for indicating that the device information is valid and a second identifier for indicating that the device information is invalid;
aiming at each piece of locally cached equipment information, judging whether the equipment information is valid or not by a system every preset time according to an equipment discovery timestamp contained in the equipment information; and in the case of detecting invalid device information, replacing the information state identification of the device information by a second identification from the first identification.
4. The method according to claim 2, wherein the step of determining whether the device information is valid according to the device discovery timestamp included in the device information comprises:
reading a device discovery timestamp from the device information;
detecting a time interval of the device discovery timestamp and a current system time;
determining the equipment information to be invalid equipment information under the condition that the time interval is greater than a preset value;
and determining the equipment information to be effective equipment information under the condition that the time interval is smaller than or equal to the preset value.
5. The method of claim 1, wherein the step of selecting a target screen projection device from the searched screen projection devices for target video projection comprises:
selecting target screen projection equipment from the searched screen projection equipment according to a preset rule;
sending an authentication request to a video cloud server;
after receiving an authentication passing message returned by the video cloud server, acquiring a video playing address acquired from the video cloud server;
and releasing the target video under the video playing address on the target screen releasing equipment.
6. The method of claim 5, wherein the step of launching the target video at the video playing address on the target screen launching device comprises:
monitoring the local playing state of the target video in the process of releasing the target video under the video playing address through the target screen releasing device;
polling the playing progress of the target video on the target screen projection equipment at a first time interval under the condition that the target video is played in a local foreground;
polling the playing progress of the target video on the target screen projection equipment at a second time interval under the condition that the target video is played in a local background;
wherein the first time interval is less than the second time interval.
7. The method according to claim 1, wherein after the step of selecting a target screen projection device from the searched screen projection devices for target video projection, the method further comprises:
sending heartbeat check information to the target screen projection equipment according to a third preset time interval;
and receiving a heartbeat message returned by the target screen projection equipment, wherein the heartbeat message is used for detecting whether the target screen projection equipment is off-line or not.
8. A screen projection apparatus, comprising:
the first starting module is used for starting the monitoring service and searching the online equipment;
the searching module is used for searching whether effective equipment information of the equipment is cached locally or not aiming at each searched online equipment; wherein the device information includes: an equipment identity mark;
a first obtaining module, configured to obtain, from a local cache, device information of the device when valid device information of the device is locally cached;
a second obtaining module, configured to obtain a device description file set of the device under a condition that valid device information of the device is not cached locally;
the first analysis module is used for analyzing the equipment description file set to obtain equipment information and locally caching the equipment information;
the screening module is used for screening the screen projection equipment according to the searched equipment information of each equipment;
the releasing module is used for selecting target screen throwing equipment from the searched screen throwing equipment and releasing a target video;
and the closing module is used for closing the monitoring service after the target screen projection equipment is selected.
9. An electronic device is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing mutual communication by the memory through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of any of claims 1 to 7 when executing a program stored in the memory.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1-7.
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