CN105007189A - Video data broadcasting method and device - Google Patents
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- CN105007189A CN105007189A CN201510453868.1A CN201510453868A CN105007189A CN 105007189 A CN105007189 A CN 105007189A CN 201510453868 A CN201510453868 A CN 201510453868A CN 105007189 A CN105007189 A CN 105007189A
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Abstract
The invention discloses a video data broadcasting method and device. The method and device are used for equally allocating to-be-decoded video data for all central processing units (CPU), utilize the CPU resource efficiently and improve the broadcasting speed of the video data. The method comprises the steps of acquiring to-be-decoded video data; equally allocating acquired video data for all CPUs; after each CPU decodes the video data, storing the decoded video data in cache corresponding to a broadcasting card according to a preset sequence, wherein the preset sequence refers to serial numbers of video frames; and reading the video data and broadcasting the video data. Through adoption of the method, the use ratio of the CPU resource is improved, the resource is prevented to be idle, and the broadcasting speed of the video data is also improved.
Description
Technical field
The present invention relates to Internet technical field, particularly a kind of broadcasting method of video data and device.
Background technology
By video camera, the first-class image obtained of making a video recording, digital code stream is become after carrying out analog-to-digital conversion, but in time scale and in spatial dimension, all there is a large amount of redundant informations, the bit stream obtained can take a large amount of spaces, be unfavorable for storing and playing, therefore need to carry out compression coding to original video stream.The video file carrying out compression coding is when broadcasting, and need first to decode to the file of compression coding, video decode is generally divided into Four processes, generally includes and obtains file, is separated audio/video flow, decoding, output.More existing playing devices comprise eight CPU and two and broadcast card, and two CPU are wherein respectively two broadcast cards and provide service, and other CPU is in idle state, causes the waste of cpu resource.
Summary of the invention
The invention provides a kind of broadcasting method and device of video data, in order to video data to be decoded is averagely allocated to each CPU, effectively utilize cpu resource, improve the broadcasting speed of video data.
The invention provides a kind of broadcasting method of video data, comprising:
Obtain video data to be decoded;
The described video data obtained is averagely allocated to each CPU;
Be stored in buffer memory corresponding to broadcast card by decoded video data by the order preset after each CPU decodes to video data, described default order comprises: by the sequence number of frame of video;
Reading video data also broadcasts.
Some beneficial effects of the embodiment of the present invention can comprise:
Video data to be decoded is averagely allocated to each CPU by the present invention, is decoded to video data by each CPU, according to the order preset, such as, according to the sequence number of frame of video, decoded video data is stored into and broadcasts in buffer memory corresponding to card, by broadcasting card reading video data and broadcasting.Each CPU of playing device can be utilized effectively, and has both improve the utilance of cpu resource, has avoided resources idle, turn improves the broadcasting speed of video data.
In one embodiment, the described video data obtained is averagely allocated to each CPU, comprises:
The frame number of video data according to frame of video is divided into groups, hashing operation is carried out to the mark of the last frame image often organizing frame of video, obtains cryptographic Hash; The mark of described image comprises: the sequence number of frame of video;
According to the cryptographic Hash preset and the corresponding relation of CPU, for this frame of video distributes corresponding CPU.
In this embodiment, the frame number of video data according to frame of video can be divided into groups, and hashing operation is carried out to the mark of the last frame image often organizing frame of video, obtain cryptographic Hash, be assigned on corresponding CPU according to Hash result.Adopt video data packets and carry out the mode of hashing operation, video data being averagely allocated to each CPU, ensureing that each CPU can obtain pending video data, avoiding the idle of cpu resource.
In one embodiment, described reading video data also broadcasts, and comprising:
The described card that broadcasts is according to the sequence number of frame of video reading video data broadcasting from buffer memory.
In this embodiment, broadcast when being stuck in reading video data, according to the sequence number of frame of video reading video data broadcasting from buffer memory in order.Adopting in this embodiment and according to the sequence number of frame of video, the frame of video of dividing into groups according to frame number is sorted, like this, can effectively avoid when reading and broadcast video data the video data caused because of sequencing problem to broadcast mistake.
In one embodiment, the described assigning process described video data obtained being averagely allocated to each CPU comprises:
Call the rps_cpu interface of playing device kernel, utilize RPS mechanism, in kernel, video data is averagely allocated to each CPU.
In this embodiment, when being averagely allocated to each CPU to video data, the assigning process of video data utilizes RPS mechanism to realize in kernel.Call the rps_cpu interface (kernel interface) of playing device kernel, utilize RPS mechanism in kernel, realize the distribution of video data to CPU.
A broadcast device for video data, comprising:
Acquisition module, for obtaining video data to be decoded;
Distribution module, for being averagely allocated to each CPU by the described video data obtained;
Memory module, be stored in buffer memory corresponding to broadcast card by decoded video data by the order preset after decoding to video data for each CPU, described default order comprises: by the sequence number of frame of video;
Broadcast module, to broadcast for reading video data.
In one embodiment, described distribution module, comprising:
First distribution sub module, for being divided into groups by the frame number of video data according to frame of video, carrying out hashing operation to the mark of the last frame image often organizing frame of video, obtaining cryptographic Hash; The mark of described image comprises: the sequence number of frame of video;
Second distribution sub module, for the corresponding relation according to the cryptographic Hash preset and CPU, for this frame of video distributes corresponding CPU.
In one embodiment, described broadcast module, comprising:
Broadcast submodule, for the described card that broadcasts according to the sequence number of frame of video reading video data broadcasting from buffer memory.
In one embodiment, described distribution module, comprising:
Calling distribution sub module, for calling the rps_cpu interface of playing device kernel, utilizing RPS mechanism, in kernel, video data is averagely allocated to each CPU.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart of the broadcasting method of a kind of video data in the embodiment of the present invention;
Fig. 2 is the flow chart of step S102 in the broadcasting method of a kind of video data in the embodiment of the present invention;
Fig. 3 is the flow chart of step S102 assigning process in the broadcasting method of a kind of video data in the embodiment of the present invention;
Fig. 4 is the flow chart of the broadcasting method of a kind of video data in the embodiment of the present invention one;
Fig. 5 is the block diagram of the broadcast device of a kind of video data in the embodiment of the present invention;
Fig. 6 is the block diagram of distribution module in the broadcast device of a kind of video data in the embodiment of the present invention;
Fig. 7 is the block diagram of the broadcast device of a kind of video data in the embodiment of the present invention two.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Fig. 1 is the flow chart of the broadcasting method of a kind of video data in the embodiment of the present invention.As shown in Figure 1, the method comprises the following steps S101-S104:
Step S101, obtains video data to be decoded;
Step S102, is averagely allocated to each CPU by the described video data obtained;
Be stored in buffer memory corresponding to broadcast card by decoded video data by the order preset after step S103, each CPU decode to video data, described default order comprises: by the sequence number of frame of video;
Step S104, reading video data also broadcasts.
The technical scheme that the embodiment of the present invention provides, is averagely allocated to each CPU by video data to be decoded, is decoded to video data by each CPU, and such as, playing device has 8 CPU, video data to be decoded is averagely allocated to these 8 CPU and decodes.According to the order preset, frame of video is numbered in order, such as, the order preset is the sequence number of frame of video, be stored into by decoded video data and broadcast in buffer memory corresponding to card, such as, broadcasting card is two, decoded video data being stored into respectively these two broadcasts in card, blocks the sequence number reading video data according to frame of video and broadcast by broadcast.Like this, each CPU of playing device can be utilized effectively, and has both improve the utilance of cpu resource, has avoided resources idle, turn improves the broadcasting speed of video data.
In one embodiment, as shown in Figure 2, step S102 can be embodied as following steps S201-S202:
Step S201, divides into groups the frame number of video data according to frame of video, carries out hashing operation, obtain cryptographic Hash to the mark of the last frame image often organizing frame of video; The mark of described image comprises: the sequence number of frame of video;
Step S202, according to the cryptographic Hash preset and the corresponding relation of CPU, for this frame of video distributes corresponding CPU.
The technical scheme that the embodiment of the present invention provides, can divide into groups the frame number of video data according to frame of video, and carry out hashing operation to the mark of the last frame image often organizing frame of video, obtain cryptographic Hash, is assigned on corresponding CPU according to Hash result.Such as, video data is one group according to every 10 frame video frame images and divides into groups, Hash is carried out to the mark of the 10th two field picture, is assigned on corresponding CPU according to Hash result.CPU decodes to video data, is stored into by decoded video data and broadcasts in buffer memory corresponding to card.Broadcast card from buffer memory, read out video data according to the sequence number of frame of video and broadcast.This employing is by video data packets and carry out the mode of hashing operation, video data is averagely allocated to each CPU, ensures that each CPU can obtain pending video data, avoid the idle of cpu resource.
In one embodiment, step S104 can be embodied as following steps:
Step S104, broadcasts card according to the sequence number of frame of video reading video data broadcasting from buffer memory.
The technical scheme that the embodiment of the present invention provides, broadcasts when being stuck in reading video data, according to the sequence number of frame of video reading video data broadcasting from buffer memory in order.Such as, playing device comprises two and broadcasts card: broadcast card one and broadcast card two, the sequence number of frame of video is 1-1000, broadcast in the buffer memory of card at two and respectively store 500 groups of frame of video, broadcasting card one and broadcast the frame of video stored in card two may be arrange in turn by the sequence number of frame of video separately, also may be random alignment, when broadcasting card one and broadcasting card two reading video data, read sequence number and the data of often organizing frame of video, and record sequence number, original position and the end position of often organizing frame of video, point to next frame of video with the form of pointer or chained list.After reading video data, broadcast card one and broadcast card two and broadcast in turn according to the sequence number of frame of video, avoid the improper unordered broadcast caused of sequence.
Adopting in this embodiment and according to the sequence number of frame of video, the frame of video of dividing into groups according to frame number is sorted, like this, can effectively avoid when reading and broadcast video data the video data caused because of sequencing problem to broadcast mistake.
In one embodiment, as shown in Figure 3, the assigning process of step S102 may be embodied as following steps step S301-S302:
Step S301, calls the rps_cpu interface of playing device kernel;
Step S302, utilizes RPS mechanism, in kernel, video data is averagely allocated to each CPU.
Rps, refers to that receive pictures steering accepts picture and controls.This assistant software is based on multinuclear cpu, to the data received carry out intelligence " select core " distribution, adjustment, the function of more perfect performance cpu.Such as main frame has the cpu of 4 cores, 1 cpu load 80%, and all the other 3 cpu loads 5%, all the other 3 cpu are in " comparatively idle condition ", and rps software by Data dissemination on the cpu of " more idle ", will divide equally burden, cpu are played more abundant.There is video card to install if assistant software detects on main frame, can video card be used to share the burden of cpu according to data type intelligence the data received.Such as, main frame has been installed video card and a cpu, video card utilization rate is 5%, is in comparatively idle condition, and cpu utilization rate 70%, is in busy condition.The graph data received is mail to video card after equipment state being detected by assistant software, uses video card to carry out image procossing.Rps_cpu interface, refers to that cpu accepts picture control interface.
The technical scheme that the embodiment of the present invention provides, when being averagely allocated to each CPU to video data, the assigning process of video data utilizes RPS mechanism to realize in kernel.Call the rps_cpu interface (kernel interface) of playing device kernel, utilize RPS mechanism in kernel, realize the distribution of video data to CPU.
The broadcasting method of the video data that the embodiment of the present invention provides is described below by specific embodiment.
Embodiment one
Fig. 4 is the flow chart of the broadcasting method of a kind of video data in the embodiment of the present invention one.As shown in Figure 4, S401-S405 is comprised the following steps:
Step S401, obtains video data to be decoded;
Step S402, divides into groups the frame number of video data according to frame of video, carries out hashing operation, obtain cryptographic Hash to the mark of the last frame image often organizing frame of video; The mark of described image comprises: the sequence number of frame of video;
Step S403, according to the cryptographic Hash preset and the corresponding relation of CPU, for this frame of video distributes corresponding CPU;
Be stored in buffer memory corresponding to broadcast card by decoded video data by the order preset after step S404, each CPU decode to video data, the order preset comprises: by the sequence number of frame of video;
Step S405, broadcasts card according to the sequence number of frame of video reading video data broadcasting from buffer memory.
The technical scheme that the present embodiment provides, comprises the assigning process that the described video data obtained is averagely allocated to each CPU: the rps_cpu interface calling playing device kernel, utilizes RPS mechanism, in kernel, video data is averagely allocated to each CPU.In this embodiment, video data to be decoded is averagely allocated to each CPU, by each CPU, video data is decoded, according to the order preset, such as, according to the sequence number of frame of video, decoded video data is stored into and broadcasts in buffer memory corresponding to card, by broadcasting card reading video data and broadcasting.Each CPU of playing device can be utilized effectively, and has both improve the utilance of cpu resource, has avoided resources idle, turn improves the broadcasting speed of video data.
Corresponding to the broadcasting method of a kind of video data that above-described embodiment provides, the embodiment of the present invention also provides a kind of broadcast device of video data, as shown in Figure 5, comprising:
Acquisition module 51, for obtaining video data to be decoded;
Distribution module 52, for being averagely allocated to each CPU by the described video data obtained;
Memory module 53, be stored in buffer memory corresponding to broadcast card by decoded video data by the order preset after decoding to video data for each CPU, described default order comprises: by the sequence number of frame of video;
Broadcast module 54, broadcast for reading video data.
In one embodiment, as shown in Figure 6, distribution module 52 comprises:
First distribution sub module 521, for being divided into groups by the frame number of video data according to frame of video, carrying out hashing operation to the mark of the last frame image often organizing frame of video, obtaining cryptographic Hash; The mark of described image comprises: the sequence number of frame of video;
Second distribution sub module 522, for the corresponding relation according to the cryptographic Hash preset and CPU, for this frame of video distributes corresponding CPU.
In one embodiment, broadcast module 54 to comprise:
Broadcast submodule, for the described card that broadcasts according to the sequence number of frame of video reading video data broadcasting from buffer memory.
In one embodiment, distribution module 52 comprises:
Calling distribution sub module, for calling the rps_cpu interface of playing device kernel, utilizing RPS mechanism, in kernel, video data is averagely allocated to each CPU.
Embodiment two
The broadcast device of the video data that the embodiment of the present invention provides, as shown in Figure 7, comprising:
Acquisition module 71, for obtaining video data to be decoded;
First distribution sub module 72, for being divided into groups by the frame number of video data according to frame of video, carrying out hashing operation to the mark of the last frame image often organizing frame of video, obtaining cryptographic Hash; The mark of described image comprises: the sequence number of frame of video;
Second distribution sub module 73, for the corresponding relation according to the cryptographic Hash preset and CPU, for this frame of video distributes corresponding CPU;
Memory module 74, be stored in buffer memory corresponding to broadcast card by decoded video data by the order preset after decoding to video data for each CPU, described default order comprises: by the sequence number of frame of video;
Broadcast module 75, for the described card that broadcasts according to the sequence number of frame of video reading video data broadcasting from buffer memory.
Video data to be decoded is averagely allocated to each CPU by the broadcast device of the video data that the embodiment of the present invention provides, by each CPU, video data is decoded, according to the order preset, such as, according to the sequence number of frame of video, decoded video data is stored into and broadcasts in buffer memory corresponding to card, by broadcasting card reading video data and broadcasting.Each CPU of playing device can be utilized effectively, and has both improve the utilance of cpu resource, has avoided resources idle, turn improves the broadcasting speed of video data.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention 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 and optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a broadcasting method for video data, is characterized in that, comprises the following steps:
Obtain video data to be decoded;
The described video data obtained is averagely allocated to each CPU;
Be stored in buffer memory corresponding to broadcast card by decoded video data by the order preset after each CPU decodes to video data, described default order comprises: by the sequence number of frame of video;
Reading video data also broadcasts.
2. the method for claim 1, is characterized in that,
The described video data obtained is averagely allocated to each CPU, comprises:
The frame number of video data according to frame of video is divided into groups, hashing operation is carried out to the mark of the last frame image often organizing frame of video, obtains cryptographic Hash; The mark of described image comprises: the sequence number of frame of video;
According to the cryptographic Hash preset and the corresponding relation of CPU, for this frame of video distributes corresponding CPU.
3. the method for claim 1, is characterized in that,
Described reading video data also broadcasts, and comprising:
The described card that broadcasts is according to the sequence number of frame of video reading video data broadcasting from buffer memory.
4. the method as described in any one of claim 1-3, is characterized in that,
The described assigning process described video data obtained being averagely allocated to each CPU comprises:
Call the rps_cpu interface of playing device kernel, utilize RPS mechanism, in kernel, video data is averagely allocated to each CPU.
5. a broadcast device for video data, is characterized in that, comprising:
Acquisition module, for obtaining video data to be decoded;
Distribution module, for being averagely allocated to each CPU by the described video data obtained;
Memory module, be stored in buffer memory corresponding to broadcast card by decoded video data by the order preset after decoding to video data for each CPU, described default order comprises: by the sequence number of frame of video;
Broadcast module, to broadcast for reading video data.
6. device as claimed in claim 5, is characterized in that,
Described distribution module, comprising:
First distribution sub module, for being divided into groups by the frame number of video data according to frame of video, carrying out hashing operation to the mark of the last frame image often organizing frame of video, obtaining cryptographic Hash; The mark of described image comprises: the sequence number of frame of video;
Second distribution sub module, for the corresponding relation according to the cryptographic Hash preset and CPU, for this frame of video distributes corresponding CPU.
7. device as claimed in claim 5, is characterized in that,
Described broadcast module, comprising:
Broadcast submodule, for the described card that broadcasts according to the sequence number of frame of video reading video data broadcasting from buffer memory.
8. the device as described in any one of claim 5-7, is characterized in that,
Described distribution module, comprising:
Calling distribution sub module, for calling the rps_cpu interface of playing device kernel, utilizing RPS mechanism, in kernel, video data is averagely allocated to each CPU.
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Denomination of invention: A broadcasting method and device of video data Effective date of registration: 20201106 Granted publication date: 20180925 Pledgee: Bank of Communications Ltd. Wuxi branch Pledgor: WUXI TVMINING MEDIA SCIENCE & TECHNOLOGY Co.,Ltd. Registration number: Y2020320010179 |
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