CN105187895A - Data-caching method and system for playing videos on mobile platform by means of hardware acceleration - Google Patents
Data-caching method and system for playing videos on mobile platform by means of hardware acceleration Download PDFInfo
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- CN105187895A CN105187895A CN201510595941.9A CN201510595941A CN105187895A CN 105187895 A CN105187895 A CN 105187895A CN 201510595941 A CN201510595941 A CN 201510595941A CN 105187895 A CN105187895 A CN 105187895A
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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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
Abstract
The invention discloses a data-caching method for playing videos on a mobile platform by means of hardware acceleration. The data-caching method comprises a step for playing video data on the foreground: playing the video data on the foreground, and caching the GOP where a video compression frame being decoded exists at present during the playing process; a step for switching the video data to the background and processing the video data: pausing playing of the video data and recording the video compression frame being decoded when the video is switched to the background, and recording the video compression frame being decoded as Frame, and recording the first frame of the GOP where the video compression frame Frame exists as Frame_I according to the decoding sequence, wherein the Frame_I is a key frame; a step for switching the video data on the background to the foreground and then processing the data on the foreground: when the video is switched to the foreground to play again, resetting a video hardware decoding module, and setting a cycle that starts from decoding of the cached key frame Frame_I, wherein the video data is not displayed until decoding of Frame is finished; and a step for switching the video data on the background to the foreground and playing the video data on the foreground: continuously playing the video data from the decoded Frame. The invention also disclosed a data-caching system for playing videos on mobile platform by means of hardware acceleration.
Description
Technical field
The application relates to media data and plays cache field, specifically, relates to a kind of data cache method for the hardware-accelerated displaying video of mobile platform and system.
Background technology
Along with the fast development of Internet technology, the mode of people's obtaining information changes, and from modes such as traditional books, newspaper, TV, broadcast, then becomes and is obtained by the Internet.Especially the comprehensive Internet video resource of movie and video programs, news, advertisement, chat video, game video and monitor video etc. Feng Gu is shared by the Internet, thus Internet video has become people's study, the social and irreplaceable important way of amusement and recreation.
For having the video website of multitude of video resource, user can be conducted interviews by the browser in terminal (such as can only mobile phone, panel computer, notebook computer, digital television etc.) the program request page of video website, viewing user wants all kinds of videos watched, and this is the Online Video viewing widely known.In addition, video file can also be downloaded on mobile terminal by user, thus can watch offline video anywhere or anytime.
When mobile platform (such as the terminal of Android or IOS system) plays local or online Media content, according to hardware accelerator, (Android adopts MediaCodec to Application and Development (App), IOS end adopts VideoToolBox) carry out video decode, if App transfers backstage to and (such as presses " home " key or " screen locking " key in playing process, or incoming call answering etc.), and then when transferring foreground continuation viewing to, lost efficacy when App transfers backstage to owing to firmly separating accelerating module (MediaCodec or VideoToolBox), when App transfers foreground again to, needs reinitialize hard accelerating module of separating and then could use, the hard solution accelerating module reinitialized must be decoded from key frame (I frame).Prior art, when employing hardware accelerator exploitation media player applications, can stop broadcasting, records the play time (memory point T) of stopping broadcasting and exit bottom playing module when App transfers backstage in playing process; Bottom playing module can be restarted when App transfers foreground again to, and according to memory point T, then key frame of video (I frame) nearest before video redirect (Seek) to T be started continue to play.
There is following defect in the scheme of prior art:
(1) at the mobile terminal of Android or IOS system, because App has restarted playing module in background/foreground handoff procedure, the key frame after switching before Seek to memory point just starts broadcasting.The content which results in viewing before and after switching is discontinuous.Usually, content viewed before the content meeting partial replay watched after again transferring foreground to transfers backstage to.
(2) if viewing be online Media content, restart playing module and mean the reloading of media file, again resolve, which results in the request again that the mass data such as media file header need by network; Add execution Seek operation again to cause the disconnection of network request and again ask.These factors make App need just can restart to play through for a long time after experience background/foreground switches, and have a strong impact on Consumer's Experience.
Summary of the invention
In view of this, technical problems to be solved in this application there is provided a kind of data cache method for the hardware-accelerated displaying video of mobile platform and system, it can solve in video display process, and the switching due to video AM/BAM causes video cannot to link up the long problem of broadcasting, again waiting time.
In order to solve the problems of the technologies described above, the application has following technical scheme:
The invention provides a kind of data cache method for the hardware-accelerated displaying video of mobile platform, comprising:
Step is play on video data foreground: at foreground playing video data, the GOP at the current video compression frames place of decoding of buffer memory in playing process;
Video data turns background process step: when video transfers backstage to, suspend the broadcasting of described video data and record the video compression frames of decoding, be designated as Frame, and according to decoding order, first frame of described video compression frames Frame place GOP is designated as Frame_I, and Frame_I is key frame;
Video data backstage turns foreground treatment step: when video transfers foreground broadcasting again to, reset vision hardware decoder module, arranging circulation and starting decode from the key frame Frame_I of buffer memory but do not show, until start after having been decoded by Frame to show again;
Video data backstage turns foreground and plays step: continued by video data to play from the Frame after having decoded.
Preferably, wherein, described video data foreground is play in step, and at foreground playing video data, the GOP at the current video compression frames place of decoding of buffer memory in playing process, further comprises:
Discharge the system resource shared by all GOP decoded.
Preferably, wherein, described video data turns in background process step, when video transfers backstage to, suspend the broadcasting of described video data and record the video compression frames of decoding, being designated as Frame, and according to decoding order, first frame of described video compression frames Frame place GOP is designated as Frame_I, and Frame_I is key frame, is further:
When video transfers backstage to, under the prerequisite without the need to closing bottom playing module, suspending the broadcasting of described video data and recording the video compression frames of decoding, being designated as Frame, and first frame of described video compression frames Frame place GOP is designated as Frame_I, Frame_I is key frame.
The present invention also provides a kind of data buffering system for the hardware-accelerated displaying video of mobile platform, comprising: video data foreground playing module, video data turn background processing module, video data backstage turns foreground processing module, video data backstage turns foreground playing module; Wherein,
Described video data foreground playing module, at foreground playing video data, the GOP at the current video compression frames place of decoding of buffer memory in playing process;
Described video data turns background processing module, for when video transfers backstage to, suspend the broadcasting of described video data and record the video compression frames of decoding, be designated as Frame, and according to decoding order, first frame of described video compression frames Frame place GOP is designated as Frame_I, and Frame_I is key frame;
Described video data backstage turns foreground processing module, during for again transferring foreground broadcasting to when video, reset vision hardware decoder module, circulation is set and starts decode from the key frame Frame_I of buffer memory but do not show, until start display after having been decoded by Frame again;
Described video data backstage turns foreground playing module, in being continued by video data to play from the Frame after having decoded.
Preferably, wherein, described video data foreground playing module is also for discharging the system resource shared by all GOP decoded.
Preferably, wherein, described video data turns background processing module, for when transferring backstage to when video, under the prerequisite without the need to closing bottom playing module, suspending the broadcasting of described video data and recording the video compression frames of decoding, being designated as Frame, and first frame of described video compression frames Frame place GOP is designated as Frame_I, Frame_I is key frame.
Compared with prior art, the method and system described in the application, reaches following effect:
First, the present invention is directed to data cache method and the system of the hardware-accelerated displaying video of mobile platform, in playing process, when video transfers backstage to from foreground, buffer memory can be carried out to the GOP at the video compression frames Frame place of decoding, when video turns foreground from backstage, video can be decoded and be started to display the play after Frame has decoded again from the GOP of buffer memory.Namely, when again transferring foreground to, can continue to play from the frame play when just transferring backstage to.Thus effectively can preserve broadcast state, avoid the repeat playing to play content, effectively improve Consumer's Experience.
Second, when playing online Media content, as long as ask the network state of media data not change (do not disconnect, heavily join) in the process that foreground/background switches, when video transfers foreground broadcasting again to, player, without the need to waiting for that network data asks can start immediately to play again, makes user can continue viewing without the need to waiting for after AM/BAM switches.
3rd, in the process playing media file, for all frames decoded complete GOP, the present invention preferably discharges the system resource shared by these GOP, avoids taking and wasting of a large amount of system resource.
4th, in the present invention, when video to transfer to from foreground without the need to closing bottom playing module the process on backstage, thus effectively saving broadcast state, when video transfers foreground to from backstage, being conducive to video and play-overing from the part disconnected.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present application, and form a application's part, the schematic description and description of the application, for explaining the application, does not form the improper restriction to the application.In the accompanying drawings:
Fig. 1 is described a kind of data cache method flow chart for the hardware-accelerated displaying video of mobile platform of the present invention.
Embodiment
As employed some vocabulary to censure specific components in the middle of specification and claim.Those skilled in the art should understand, and hardware manufacturer may call same assembly with different noun.This specification and claims are not used as with the difference of title the mode distinguishing assembly, but are used as the criterion of differentiation with assembly difference functionally." comprising " as mentioned in the middle of specification and claim is in the whole text an open language, therefore should be construed to " comprise but be not limited to "." roughly " refer to that in receivable error range, those skilled in the art can solve the technical problem within the scope of certain error, reach described technique effect substantially.In addition, " couple " word and comprise directly any and indirectly electric property coupling means at this.Therefore, if describe a first device in literary composition to be coupled to one second device, then represent described first device and directly can be electrically coupled to described second device, or be indirectly electrically coupled to described second device by other devices or the means that couple.Specification subsequent descriptions is implement the better embodiment of the application, and right described description is for the purpose of the rule that the application is described, and is not used to the scope limiting the application.The protection range of the application is when being as the criterion depending on the claims person of defining.
Embodiment 1
Shown in Figure 1 is the data cache method specific embodiment for the hardware-accelerated displaying video of mobile platform described in the application, and described in the present embodiment, method comprises the following steps:
Step 101, video data foreground play step: at foreground playing video data, GOP (the GroupofPictures at the current video compression frames place of decoding of buffer memory in playing process, in video flowing, according to decoding sequence (containing this key frame) from a certain key frame, all frames between next key frame (not containing this key frame) are called a GOP);
Step 102, video data turn background process step: when video transfers backstage to, suspend the broadcasting of described video data and record the video compression frames of decoding, be designated as Frame, and according to decoding order, first frame of described video compression frames Frame place GOP is designated as Frame_I, and Frame_I is key frame;
Step 103, video data backstage turn foreground treatment step: when video transfers foreground broadcasting again to, reset vision hardware decoder module, arrange circulation to start decode from the key frame Frame_I of buffer memory but do not show, until start display after having been decoded by Frame again;
Step 104, video data backstage turn foreground and play step: continued by video data to play from the Frame after having decoded.
The present invention is directed to data cache method and the system of the hardware-accelerated displaying video of mobile platform, in playing process, when video transfers backstage to from foreground, buffer memory can be carried out to the GOP at the video compression frames Frame place of decoding, when video turns foreground from backstage, video can be decoded and be started to display the play after Frame has decoded again from the GOP of buffer memory, namely when again transferring foreground to, can continue to play from the frame play when just transferring backstage to, thus effectively can preserve broadcast state, avoid the repeat playing to play content, effectively improve Consumer's Experience.
In addition, when playing online Media content, as long as ask the network state of media data not change (do not disconnect, heavily join) in the process that foreground/background switches, when video transfers foreground broadcasting again to, player is without the need to waiting for that network data asks can start immediately to play again.
In above-mentioned steps 101, at foreground playing video data, the GOP at the current video compression frames place of decoding of buffer memory in playing process, further comprises:
Discharge the system resource shared by all GOP decoded.
In such scheme, after the system resource shared by the GOP decoded is discharged, avoid taking and wasting of a large amount of system resource.
In above-mentioned steps 102, when video transfers backstage to, suspend the broadcasting of described video data and record the video compression frames of decoding, be designated as Frame, and according to decoding order, first frame of described video compression frames Frame place GOP be designated as Frame_I, Frame_I is key frame, is further:
When video transfers backstage to, under the prerequisite without the need to closing bottom playing module, suspending the broadcasting of described video data and recording the video compression frames of decoding, being designated as Frame, and first frame of described video compression frames Frame place GOP is designated as Frame_I, Frame_I is key frame.
When video to transfer to from foreground without the need to closing bottom playing module the process on backstage, thus effectively saving broadcast state, when video transfers foreground to from backstage, being conducive to video and play-overing from the part disconnected.
Embodiment 2
A kind of data buffering system for the hardware-accelerated displaying video of mobile platform of the present invention, comprising: video data foreground playing module, video data turn background processing module, video data backstage turns foreground processing module, video data backstage turns foreground playing module; Wherein,
Described video data foreground playing module, at foreground playing video data, the GOP at the current video compression frames place of decoding of buffer memory in playing process;
Described video data turns background processing module, for when video transfers backstage to, suspend the broadcasting of described video data and record the video compression frames of decoding, be designated as Frame, and according to decoding order, first frame of described video compression frames Frame place GOP is designated as Frame_I, and Frame_I is key frame;
Described video data backstage turns foreground processing module, during for again transferring foreground broadcasting to when video, reset vision hardware decoder module, circulation is set and starts decode from the key frame Frame_I of buffer memory but do not show, until start display after having been decoded by Frame again;
Described video data backstage turns foreground playing module, plays for being continued from the Frame after having decoded by video data.
Above-mentioned video data foreground playing module is also for discharging the system resource shared by all GOP decoded.
Above-mentioned video data turns background processing module, for when transferring backstage to when video, under the prerequisite without the need to closing bottom playing module, suspend the broadcasting of described video data and record the video compression frames of decoding, be designated as Frame, and first frame of described video compression frames Frame place GOP is designated as Frame_I, Frame_I is key frame.
Known by above each embodiment, the beneficial effect that the application exists is:
First, the present invention is directed to data cache method and the system of the hardware-accelerated displaying video of mobile platform, in playing process, when video transfers backstage to from foreground, buffer memory can be carried out to the GOP at the video compression frames Frame place of decoding, when video turns foreground from backstage, video can be decoded and be started to display the play after Frame has decoded again from the GOP of buffer memory, namely when again transferring foreground to, can continue to play from the frame play when just transferring backstage to, thus effectively can preserve broadcast state, avoid the repeat playing to play content, effectively improve Consumer's Experience.
Second, when playing online Media content, as long as ask the network state of media data not change (do not disconnect, heavily join) in the process that foreground/background switches, when video transfers foreground broadcasting again to, player, without the need to waiting for that network data asks can start immediately to play again, makes user can continue viewing without the need to waiting for after AM/BAM switches.
3rd, in the process playing media file, for all frames decoded complete GOP, the present invention preferably discharges the system resource shared by these GOP, avoids taking and wasting of a large amount of system resource.
4th, in the present invention, when video to transfer to from foreground without the need to closing bottom playing module the process on backstage, thus effectively saving broadcast state, when video transfers foreground to from backstage, being conducive to video and play-overing from the part disconnected.
Those skilled in the art should understand, the embodiment of the application can be provided as method, device or computer program.Therefore, the application can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the application can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
Above-mentioned explanation illustrate and describes some preferred embodiments of the application, but as previously mentioned, be to be understood that the application is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in invention contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from the spirit and scope of the application, then all should in the protection range of the application's claims.
Claims (6)
1. for a data cache method for the hardware-accelerated displaying video of mobile platform, it is characterized in that, comprising:
Step is play on video data foreground: at foreground playing video data, the GOP at the current video compression frames place of decoding of buffer memory in playing process;
Video data turns background process step: when video transfers backstage to, suspend the broadcasting of described video data and record the video compression frames of decoding, be designated as Frame, and according to decoding order, first frame of described video compression frames Frame place GOP is designated as Frame_I, and Frame_I is key frame;
Video data backstage turns foreground treatment step: when video transfers foreground broadcasting again to, reset vision hardware decoder module, arranging circulation and starting decode from the key frame Frame_I of buffer memory but do not show, until start after having been decoded by Frame to show again;
Video data backstage turns foreground and plays step: continued by video data to play from the Frame after having decoded.
2., according to claim 1 for the data cache method of the hardware-accelerated displaying video of mobile platform, it is characterized in that,
Described video data foreground is play in step, and at foreground playing video data, the GOP at the current video compression frames place of decoding of buffer memory in playing process, further comprises:
Discharge the system resource shared by all GOP decoded.
3. according to claim 1 or 2 for the data cache method of the hardware-accelerated displaying video of mobile platform, it is characterized in that,
Described video data turns in background process step, when video transfers backstage to, suspend the broadcasting of described video data and record the video compression frames of decoding, be designated as Frame, and according to decoding order, first frame of described video compression frames Frame place GOP is designated as Frame_I, and Frame_I is key frame, is further:
When video transfers backstage to, under the prerequisite without the need to closing bottom playing module, suspending the broadcasting of described video data and recording the video compression frames of decoding, being designated as Frame, and first frame of described video compression frames Frame place GOP is designated as Frame_I, Frame_I is key frame.
4. the data buffering system for the hardware-accelerated displaying video of mobile platform, it is characterized in that, comprising: video data foreground playing module, video data turn background processing module, video data backstage turns foreground processing module, video data backstage turns foreground playing module; Wherein,
Described video data foreground playing module, at foreground playing video data, the GOP at the current video compression frames place of decoding of buffer memory in playing process;
Described video data turns background processing module, for when video transfers backstage to, suspend the broadcasting of described video data and record the video compression frames of decoding, be designated as Frame, and according to decoding order, first frame of described video compression frames Frame place GOP is designated as Frame_I, and Frame_I is key frame;
Described video data backstage turns foreground processing module, during for again transferring foreground broadcasting to when video, reset vision hardware decoder module, circulation is set and starts decode from the key frame Frame_I of buffer memory but do not show, until start display after having been decoded by Frame again;
Described video data backstage turns foreground playing module, in being continued by video data to play from the Frame after having decoded.
5., according to claim 4 for the data buffering system of the hardware-accelerated displaying video of mobile platform, it is characterized in that,
Described video data foreground playing module is also for discharging the system resource shared by all GOP decoded.
6. according to claim 4 or 5 for the data buffering system of the hardware-accelerated displaying video of mobile platform, it is characterized in that,
Described video data turns background processing module, for when transferring backstage to when video, under the prerequisite without the need to closing bottom playing module, suspend the broadcasting of described video data and record the video compression frames of decoding, be designated as Frame, and first frame of described video compression frames Frame place GOP is designated as Frame_I, Frame_I is key frame.
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