CN108833945A - A kind of method and device flowed using single channel DMA simultaneous transmission multichannel TS - Google Patents
A kind of method and device flowed using single channel DMA simultaneous transmission multichannel TS Download PDFInfo
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- CN108833945A CN108833945A CN201810713296.XA CN201810713296A CN108833945A CN 108833945 A CN108833945 A CN 108833945A CN 201810713296 A CN201810713296 A CN 201810713296A CN 108833945 A CN108833945 A CN 108833945A
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000012545 processing Methods 0.000 claims description 19
- 238000012546 transfer Methods 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 11
- 239000002131 composite material Substances 0.000 claims description 3
- 238000004590 computer program Methods 0.000 claims description 3
- 230000005055 memory storage Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
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- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
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Classifications
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
-
- 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
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
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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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Time-Division Multiplex Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
It is provided by the invention it is a kind of using single channel DMA simultaneous transmission multichannel TS flow method and device, wherein method include：First bit of the TS packet of every TS stream is changed to mark ID, mark ID and TS stream have corresponding relationship；It two or more TS streams to be processed are merged into a TS flows and passes through single channel DMA and transmit；According to TS flow in the mark ID of TS packet determine TS stream belonging to TS packet, mark ID is reverted into first original bit, TS packet is sent to Interrupt Subroutine corresponding with the affiliated TS stream of TS packet.After the present invention synthesizes a TS stream by setting mark ID and by two or more TS stream to be processed, the TS packet in TS stream after CPU being enabled to judge synthesis by setting mark ID belongs to which TS stream in multichannel TS stream, realize by single channel DMA carry out simultaneous transmission multichannel TS stream, solve traditional multichannel TS spread it is defeated need multi-channel DMA transmission cause it is at high cost, occupy resources of chip more than technical problem.
Description
Technical field
The present invention relates to data transmission and processing technical field more particularly to a kind of use single channel DMA simultaneous transmission multichannels
The method and device of TS stream.
Background technique
In television transmission system, the TS stream that standard is widely used carries out the transmission of digital audio/video.User is in viewing, record
When program processed, it is necessary first to obtain television transmission signal by the mode of antenna or coaxial cable, then carry out frequency reducing, solution
Reason is mediated, the TS comprising audio/video program information is obtained and flows.After obtaining one or two or more TS stream, it usually needs by DMA
It is transmitted to CPU and is decoded processing.
DMA：Direct memory access (Direct Memory Access, DMA) is that one of computer science memory is visited
Ask technology.It allows the hardware subsystem (computer peripheral equipment) inside certain computers, can independently direct read/write Installed System Memory, and
It is not required to central processing unit (CPU) intervention processing.Under the processor burden of equal extent, DMA is a kind of quick data transmission
Mode.The system of many hardware will use DMA, include hard disk controller, drawing video card, network interface card and sound card.
TS stream：It includes audio, view that English name Transport Stream, also known as transport stream, which are a kind of transimission and storages,
The reference format of frequency and the various data of communication protocol is used for digital television broadcasting system, such as DVB, ATSC, IPTV.
IP:English name Intellectual Property is integrated circuit and the modularization side that FPGA function is realized
Formula.By required Functional Design at individual module, developer is taken chip design vendors with these modules for having already passed through verifying
Circuit is built, design schedule can be greatly accelerated.
In the acquisition of existing TS stream, retransmission technique, if to handle the forwarding of two or more TS stream simultaneously, need to make
With the DMA or multiple DMA of multichannel, these methods are furnished with a dedicated DMA channel to every TS stream, and CPU is according to DMA
Setting go to handle the TS data in corresponding memory.
The forwarding that the prior art is flowed by using multi-channel DMA or multiple DMA progress two or more TS, and these DMA
Design cost it is very high, firstly, this IP of multi-channel DMA implements complexity, the resources of chip of occupancy is more than single channel DMA
It is more；Secondly, the difference of TS stream quantity, the channel of DMA will also follow modification, flexibility ratio is insufficient.
Summary of the invention
The present invention provides a kind of method and devices flowed using single channel DMA simultaneous transmission multichannel TS, pass for solving
The multichannel TS of system spread it is defeated need multi-channel DMA or multiple DMA transfers cause it is at high cost, occupy resources of chip more than technology ask
Topic.
A kind of method flowed using single channel DMA simultaneous transmission multichannel TS provided by the invention, including：
S1：First bit of the TS packet of every TS stream is changed to mark ID, the mark ID and has corresponding pass with TS stream
System；
S2：It two or more TS streams to be processed are merged into a TS flows and passes through single channel DMA and transmit；
S3：The mark ID for reading the TS packet in the TS stream by single channel DMA transfer, determines belonging to TS packet according to mark ID
TS stream, mark ID is reverted into first original bit, TS packet is sent to the corresponding interruption of the TS stream affiliated with TS packet
Processing subroutine.
Preferably, further include after the step S1, before step S2：
X：More than two TS packages in same TS stream are synthesized into a TS packet, the starting of TS packet is regenerated, terminates
Mark.
Preferably, further include after the step S2, before step S3：
Y：Contracting for fixed output quotas every the TS of preset quantity, life is primary to be interrupted.
Preferably, the mark ID is specially numerical value i, wherein i indicates i-th TS stream.
A kind of device flowed using single channel DMA simultaneous transmission multichannel TS provided by the invention, including：
Sign module, first bit of the TS packet for flowing every TS are changed to mark ID, the mark ID and TS stream
Has corresponding relationship；
TS highway switching flows for two or more TS streams to be processed to be merged into a TS and passes through single channel
DMA is transmitted；
CPU determines TS according to mark ID for reading the mark ID of the TS packet in the TS stream by single channel DMA transfer
Mark ID is reverted to first original bit by TS stream belonging to packet, TS packet is sent to corresponding with TS stream belonging to TS packet
Interrupt Subroutine.
Preferably, which further includes：
Composite module regenerates TS packet for more than two TS packages in same TS stream to be synthesized a TS packet
Starting, end mark.
Preferably, which further includes：
Single channel DMA is used for transmission TS stream and contracts for fixed output quotas every the TS of preset quantity and gives birth to primary interrupt to CPU.
Preferably, the mark ID is specially numerical value i, wherein i indicates i-th TS stream.
A kind of device flowed using single channel DMA simultaneous transmission multichannel TS provided by the invention, including：
Memory, for storing instruction；
Processor is coupled to the memory, the processor is configured to the instruction based on memory storage is held
Row realizes such as above-mentioned method.
A kind of computer readable storage medium provided by the invention is stored with calculating on the computer readable storage medium
Machine program is realized when the computer program is executed by processor such as the step of above-mentioned method.
As can be seen from the above technical solutions, the present invention has the following advantages that：
A kind of method flowed using single channel DMA simultaneous transmission multichannel TS provided by the invention, including：S1：By every TS
First bit of the TS packet of stream is changed to mark ID, the mark ID and TS stream has corresponding relationship；S2：By to be processed two
The above TS stream, which merges into a TS and flows and pass through single channel DMA, to be transmitted；S3：It reads and is flowed by the TS of single channel DMA transfer
In TS packet mark ID, determine that the TS belonging to TS packet flows according to mark ID, will indicate that ID reverts to first original bit,
TS packet is sent to Interrupt Subroutine corresponding with TS stream belonging to TS packet.The present invention passes through setting mark ID and will be to
TS after two or more the TS stream of processing synthesizes a TS stream, after CPU being enabled to judge synthesis by setting mark ID
TS packet in stream belongs to which TS stream in multichannel TS stream, and gives corresponding Interrupt Subroutine processing, realizes logical
It crosses single channel DMA and carries out simultaneous transmission multichannel TS stream, solve traditional multichannel TS and spread and defeated need multi-channel DMA or multiple
DMA transfer leads to technical problem at high cost, more than occupancy resources of chip.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is a kind of one embodiment of method using single channel DMA simultaneous transmission multichannel TS stream provided by the invention
Flow chart；
Fig. 2 is a kind of another implementation of method using single channel DMA simultaneous transmission multichannel TS stream provided by the invention
The flow chart of example；
Fig. 3 is a kind of another implementation of method using single channel DMA simultaneous transmission multichannel TS stream provided by the invention
The schematic diagram of description flags ID is used in example；
Fig. 4 is a kind of another implementation of method using single channel DMA simultaneous transmission multichannel TS stream provided by the invention
For illustrating that multiple TS packages are combined into the schematic diagram of a TS packet in example；
Fig. 5 is a kind of another implementation of method using single channel DMA simultaneous transmission multichannel TS stream provided by the invention
For illustrating that TS spreads defeated schematic diagram in example；
Fig. 6 is a kind of another implementation of method using single channel DMA simultaneous transmission multichannel TS stream provided by the invention
The schematic diagram interrupted in example for illustrating CPU.
Specific embodiment
The present invention provides a kind of method and devices flowed using single channel DMA simultaneous transmission multichannel TS, pass for solving
The multichannel TS of system spread it is defeated need multi-channel DMA or multiple DMA transfers cause it is at high cost, occupy resources of chip more than technology ask
Topic.
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that disclosed below
Embodiment be only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field
Those of ordinary skill's all other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
Referring to Fig. 1, an a kind of reality of method using single channel DMA simultaneous transmission multichannel TS stream provided by the invention
Example is applied, including：
101：First bit of the TS packet of every TS stream is changed to mark ID, the mark ID and has corresponding pass with TS stream
System；
First bit byte of standard TS stream is fixed as hexadecimal 0x47, can be replaced with mark ID.
It is numerical value i that the corresponding relationship, which can be mark ID, and i indicates i-th TS stream, is also possible to indicate that ID is j, j passes through
Series of algorithms obtains numerical value i after calculating, i indicates that i-th TS flows, in the present embodiment without limitation.
102：It two or more TS streams to be processed are merged into a TS flows and passes through single channel DMA and transmit；
The execution module of the step can be conventional stream bus switch.
103：The mark ID for reading the TS packet in the TS stream by single channel DMA transfer determines TS packet institute according to mark ID
The TS of category flows, and mark ID is reverted to first original bit, TS packet is sent in corresponding with TS stream belonging to TS packet
Disconnected processing subroutine.
Each TS stream has its corresponding Interrupt Subroutine, reverts to first original bit in mark ID
Afterwards, Interrupt Subroutine can handle TS packet according to the normal flow of the prior art.
After the present invention synthesizes a TS stream by setting mark ID and by two or more TS stream to be processed, pass through setting
Mark ID can enable CPU to judge that the TS packet in the TS stream after synthesizing belongs to which TS stream in multichannel TS stream, and hand over
The processing of corresponding Interrupt Subroutine is given, realizes and simultaneous transmission multichannel TS stream is carried out by single channel DMA, solve tradition
Multichannel TS spread it is defeated need multi-channel DMA or multiple DMA transfers cause it is at high cost, occupy resources of chip more than technical problem.
It is to a kind of implementation of the method using single channel DMA simultaneous transmission multichannel TS stream provided by the invention above
Example is described in detail, below will be to a kind of method flowed using single channel DMA simultaneous transmission multichannel TS provided by the invention
Another embodiment be described in detail.
Referring to Fig. 2, another of a kind of method using single channel DMA simultaneous transmission multichannel TS stream provided by the invention
Embodiment, including：
201：First bit of the TS packet of every TS stream is changed to mark ID, the mark ID and has corresponding pass with TS stream
System；
As shown in figure 3, first bit of the TS packet of every TS stream is changed to the mark ID of this TS stream, so that rear end
Process flow can distinguish each packet and flow from which TS.Indicate that ID is specially numerical value i, wherein i indicates i-th TS stream.With i-th
TS stream citing, the first character section 0x47 of all TS packets, which is replaced by, indicates i.
202：More than two TS packages in same TS stream are synthesized into a TS packet, regenerate starting, the knot of TS packet
Bundle flag；
As shown in figure 4, multiple TS packages of every TS stream are synthesized 1 long packet.It is cut the purpose for the arrangement is that mitigating TS stream
The TS bus arbitration frequency of switch is changed, to reduce the interruption times of arbitration required clock frequency and CPU.
203：It two or more TS streams to be processed are merged into a TS flows and passes through single channel DMA and transmit；
Referring to Fig. 5, a plurality of TS stream passes through TS highway switching, it is merged into a TS stream.Due to by step 201,
The processing of step 202, this TS bus switch can be conventional stream bus switch, and every TS stream has caching.Bus arbitration
It when TS flows, is carried out according to the length of TS packet, when detecting TS inclusion bundle flag, this time arbitration terminates, and starts new arbitration.It closes
At 1 TS stream by single channel DMA transfer to memory and CPU.
204：Contracting for fixed output quotas every the TS of preset quantity, life is primary to be interrupted.
Single channel DMA is arranged to several TS long packet and generates primary interruption, since step 202 includes multiple TS
At 1 long packet, so that in the case where same TS stream transmission rate, DMA interrupts the number generated and reduces at multiple, in CPU
Disconnected response times are also reduced at double.
205：The mark ID for reading the TS packet in the TS stream by single channel DMA transfer determines TS packet institute according to mark ID
The TS of category flows, and mark ID is reverted to first original bit, TS packet is sent in corresponding with TS stream belonging to TS packet
Disconnected processing subroutine.
Referring to Fig. 6, in CPU interrupt processing, since data are sent into specified memory physical address, CPU by DMA
In each interrupt, corresponding address is gone to go to read data.When reading first bit is i, CPU judges that this is i-th
The packet of TS stream, then restores it into 0x47, then gives the TS packet after recovery to corresponding Interrupt Subroutine.
Therefore, the embodiment of the present invention can use improved TS and flow so that single channel DMA while handling, transmitting a plurality of TS
Stream.The TS packet of every TS stream is increased into flag bit first, this flag bit is placed on the bit of first TS packet.It again will be multiple new
TS package synthesize TS long and wrap, regenerate starting, the end mark of packet.All TS streams be synthesized all the way TS stream after to
DMA, DMA, which generate to interrupt, gives CPU processing, and CPU elder generation judgement symbol position, then recovering mark position, recalls in each TS stream
Disconnected processing subroutine.
The present invention flows into line flag to TS, re-groups package processing, allow to using single channel DMA can be with simultaneous transmission at
Manage a plurality of TS stream.Make in the design of FPGA design or integrated circuit in this way, without designing multi-channel DMA, it is only necessary to simple
Processing and transmission while TS flows can be completed using single channel DMA.
It is to a kind of another reality of the method using single channel DMA simultaneous transmission multichannel TS stream provided by the invention above
Example is applied to be described in detail, it below will be to a kind of dress flowed using single channel DMA simultaneous transmission multichannel TS provided by the invention
The one embodiment set is described in detail.
A kind of one embodiment of device using single channel DMA simultaneous transmission multichannel TS stream provided by the invention, including：
Sign module, first bit of the TS packet for flowing every TS are changed to mark ID, the mark ID and TS stream
Has corresponding relationship；
TS highway switching flows for two or more TS streams to be processed to be merged into a TS and passes through single channel
DMA is transmitted；
CPU determines TS according to mark ID for reading the mark ID of the TS packet in the TS stream by single channel DMA transfer
Mark ID is reverted to first original bit by TS stream belonging to packet, TS packet is sent to corresponding with TS stream belonging to TS packet
Interrupt Subroutine.
Composite module regenerates TS packet for more than two TS packages in same TS stream to be synthesized a TS packet
Starting, end mark.
Single channel DMA is used for transmission TS stream and contracts for fixed output quotas every the TS of preset quantity and gives birth to primary interrupt to CPU.
Indicate that ID is specially numerical value i, wherein i indicates i-th TS stream.
It is to a kind of another reality of the device using single channel DMA simultaneous transmission multichannel TS stream provided by the invention below
Example is applied to be described in detail.
A kind of another embodiment of device using single channel DMA simultaneous transmission multichannel TS stream provided by the invention, packet
It includes：
Memory, for storing instruction；
Processor is coupled to the memory, the processor is configured to the instruction based on memory storage is held
Row realizes the method such as above-described embodiment.
It is that a kind of computer readable storage medium provided by the invention is described in detail below.
A kind of computer readable storage medium provided by the invention is stored with calculating on the computer readable storage medium
Machine program, when the computer program is executed by processor the step of the realization such as method of above-described embodiment.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
That each unit physically exists alone, can also more than two units be integrated in one unit.Above-mentioned integrated unit both may be used
To use formal implementation of hardware, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes：USB flash disk, mobile hard disk, read-only memory (ROM, Read-
OnlyMemory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various to deposit
Store up the medium of program code.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that：It still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of method flowed using single channel DMA simultaneous transmission multichannel TS, which is characterized in that including：
S1：First bit of the TS packet of every TS stream is changed to mark ID, the mark ID and TS stream has corresponding relationship；
S2：It two or more TS streams to be processed are merged into a TS flows and passes through single channel DMA and transmit；
S3：The mark ID for reading the TS packet in the TS stream by single channel DMA transfer determines TS belonging to TS packet according to mark ID
Mark ID is reverted to first original bit by stream, and TS packet is sent to interrupt processing corresponding with TS stream belonging to TS packet
Subprogram.
2. a kind of method flowed using single channel DMA simultaneous transmission multichannel TS according to claim 1, which is characterized in that
Further include after the step S1, before step S2：
X：More than two TS packages in same TS stream are synthesized into a TS packet, regenerate starting, the end mark of TS packet.
3. a kind of method flowed using single channel DMA simultaneous transmission multichannel TS according to claim 1, which is characterized in that
Further include after the step S2, before step S3：
Y：Contracting for fixed output quotas every the TS of preset quantity, life is primary to be interrupted.
4. a kind of method flowed using single channel DMA simultaneous transmission multichannel TS according to claim 1, which is characterized in that
The mark ID is specially numerical value i, wherein i indicates i-th TS stream.
5. a kind of device flowed using single channel DMA simultaneous transmission multichannel TS, which is characterized in that including：
Sign module, first bit of the TS packet for flowing every TS are changed to mark ID, and the mark ID and TS stream has
Corresponding relationship；
TS highway switching, for by two or more TS streams to be processed merge into a TS flow and pass through single channel DMA into
Row transmission；
CPU determines TS packet institute according to mark ID for reading the mark ID of the TS packet in the TS stream by single channel DMA transfer
The TS of category flows, and mark ID is reverted to first original bit, TS packet is sent in corresponding with TS stream belonging to TS packet
Disconnected processing subroutine.
6. a kind of device flowed using single channel DMA simultaneous transmission multichannel TS according to claim 5, which is characterized in that
Further include：
Composite module regenerates rising for TS packet for more than two TS packages in same TS stream to be synthesized a TS packet
Begin, end mark.
7. a kind of device flowed using single channel DMA simultaneous transmission multichannel TS according to claim 5, which is characterized in that
Further include：
Single channel DMA is used for transmission TS stream and contracts for fixed output quotas every the TS of preset quantity and gives birth to primary interrupt to CPU.
8. a kind of device flowed using single channel DMA simultaneous transmission multichannel TS according to claim 5, which is characterized in that
The mark ID is specially numerical value i, wherein i indicates i-th TS stream.
9. a kind of device flowed using single channel DMA simultaneous transmission multichannel TS, which is characterized in that including：
Memory, for storing instruction；
Processor is coupled to the memory, the processor is configured to the instruction execution based on memory storage is real
Now method according to any one of claims 1 to 4.
10. a kind of computer readable storage medium, which is characterized in that be stored with computer on the computer readable storage medium
The step of program, the computer program realizes method according to any one of claims 1 to 4 when being executed by processor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810713296.XA CN108833945B (en) | 2018-06-29 | 2018-06-29 | Method and device for simultaneously transmitting multiple TS streams by using single-channel DMA (direct memory Access) |
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| CN201810713296.XA CN108833945B (en) | 2018-06-29 | 2018-06-29 | Method and device for simultaneously transmitting multiple TS streams by using single-channel DMA (direct memory Access) |
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