CN115277431A - Topology changing method and device, computer equipment and storage medium - Google Patents
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Abstract
The disclosure relates to a topology changing method, a topology changing device, computer equipment and a storage medium. The method comprises the following steps: when a transmission node in the transmission link changes, a first transmission node which needs topology change and a first performance parameter used when the first transmission node changes the topology are determined; determining a main topological structure and a secondary topological structure according to the performance parameter of each topological structure in the transmission link and the first performance parameter, wherein the main topological structure comprises a plurality of secondary topological structures; determining a first topological structure of the first transmission node according to the primary topological structure and the secondary topological structure; and carrying out topology change on the first transmission node according to the first topology structure. By adopting the method, the link topology level can be reasonably distributed without influencing other nodes and/or video equipment in the link.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a topology changing method and apparatus, a computer device, and a storage medium.
Background
At present, video image processing systems, especially video image processing systems with DisplayPort (DP, digital video Interface standard) of VESA (video Electronics Standards Association), MIPI (Mobile Industry Processor Interface standard), and HDMI (high definition Multimedia Interface standard), are used to drive display terminals such as liquid crystal and organic light emitting diode.
In the process of multi-channel display of a video image processing system, when a node and/or a video terminal in a link changes, the node and/or the video terminal is not in the link or is newly added into the link, so that a video source cannot reasonably distribute the link topology level of the node and/or the video terminal, and other nodes and/or video terminals in the link cannot correctly receive data.
Disclosure of Invention
In view of the above, it is desirable to provide a topology change method, device, computer device, and storage medium that can reasonably allocate a link topology level without affecting other nodes and/or video devices in a link.
In a first aspect, the present disclosure provides a topology changing method. The method is applied to a video image processing system, the video image processing system comprises a plurality of transmission nodes, each transmission node corresponds to one or more transmission links, and each transmission node has a corresponding topological structure in each transmission link, and the method comprises the following steps:
when a transmission node in the transmission link changes, a first transmission node which needs topology change and a first performance parameter used when the first transmission node carries out topology change are determined;
determining a main topological structure and a secondary topological structure according to the performance parameter of each topological structure in the transmission link and the first performance parameter, wherein the main topological structure comprises a plurality of secondary topological structures;
determining a first topological structure of the first transmission node according to the primary topological structure and the secondary topological structure;
and carrying out topology change on the first transmission node according to the first topology structure.
In one embodiment, the determining a primary topology and a secondary topology according to the performance parameter of each topology in the transmission link and the first performance parameter includes:
determining a main topology structure according to at least one of the first performance parameters and the performance parameters of each main topology structure in the transmission link, wherein the main topology structure comprises each channel in the topology structure;
determining a secondary topology structure according to at least one of the first performance parameters and the performance parameters of each secondary topology structure in the transmission link, the secondary topology structure comprising each topology level in each channel;
wherein the first performance parameter includes at least: reference clock, pixel clock, resolution, clock offset, and frame rate.
In one embodiment, determining the first performance parameter used when performing the topology change includes:
selecting a performance parameter used when the first transmission node performs topology change;
measuring the performance parameters used during topology change to obtain a measurement result;
determining a first performance parameter based on the measurement.
In one embodiment, after the topology change is performed on the first transmission node according to the first topology, the method further includes:
sending video data to the first transmission node;
judging whether the first transmission node has the capability of performance switching;
if the first transmission node has the capability of switching the performance, the first transmission node displays the video data and sends the video data to a lower transmission node connected with the first transmission node;
if the first transmission node does not have the capability of performance switching, sending a signaling to a lower transmission node connected with the first transmission node, wherein the signaling is used for indicating the lower transmission node to display the cached video data;
wherein the capability of the performance switching at least comprises: processes the received video data and manages a lower level transmission node connected thereto.
In one embodiment, after the first transmission node displays the video data, the method further comprises:
in the event that the first transport node fails to display the video data, and carrying out topology change on the first transmission node again until the first transmission node successfully displays the video data.
In one embodiment, the method further comprises:
when topology change is carried out, the first transmission node is subjected to topology change through interaction of a pre-constructed topology change frame structure and the first transmission node, wherein the pre-constructed topology change frame structure is obtained by adding a functional time slot in a standard frame structure.
In one embodiment, the functional time slot includes at least: the method comprises the following steps of (1) topology modification time slots, performance parameter identification time slots, main topology determination time slots, secondary topology determination time slots and topology confirmation time slots; the performing topology change on the first transmission node includes:
adjusting a topology modification time slot in the topology modification frame structure to be enabled, wherein the topology modification time slot is used for determining whether to perform topology modification;
identifying a time slot according to the performance parameters in the topology change frame structure, and determining a first performance parameter used when the first transmission node performs topology change;
adjusting a main topology determination time slot and a secondary topology determination time slot in the topology change frame structure according to the first performance parameter and the performance parameter of each topology structure in the transmission link, wherein the main topology determination time slot is used for determining a channel to be changed of the first transmission node, and the secondary topology determination time slot is used for determining a topology level to be changed of the first transmission node;
adjusting a topology confirmation time slot in the topology change frame structure according to the channel to be changed of the first transmission node and the topology level to be changed of the first transmission node, wherein the topology confirmation time slot is used for determining a final channel and a topology level;
and carrying out topology change on the first transmission node according to the topology confirmation time slot.
In one embodiment, after the topology change is performed on the first transmission node according to the topology confirmation time slot, the method further includes:
and adjusting the topology modification time slot in the topology modification frame structure to be forbidden, wherein the functional time slot is invalid under the condition that the topology modification time slot is forbidden, and transmitting data to each transmission node through a standard frame structure.
In a second aspect, the present disclosure also provides a topology changing apparatus. The device is applied to a video image processing system, the video image processing system comprises a plurality of transmission nodes, each transmission node corresponds to one or a plurality of transmission links, and each transmission node has a corresponding topological structure in each transmission link, and the device comprises:
a change preparation module, configured to determine, when a transmission node in the transmission link changes, a first transmission node that needs to perform topology change and a first performance parameter used when the first transmission node performs topology change;
the first structure determining module is used for determining a main topological structure and a secondary topological structure according to the performance parameter of each topological structure in the transmission link and the first performance parameter, wherein the main topological structure comprises a plurality of secondary topological structures;
a second structure determining module, configured to determine a first topological structure of the first transmission node according to the primary topological structure and the secondary topological structure;
and the topology changing module is used for carrying out topology changing on the first transmission node according to the first topology structure.
In a third aspect, the present disclosure also provides a computer device. The computer device comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the method embodiments when executing the computer program.
In a fourth aspect, the present disclosure also provides a computer-readable storage medium. The computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
In a fifth aspect, the present disclosure also provides a computer program product. The computer program product comprises a computer program which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
In the above embodiments, when a transmission node in the transmission link changes, the first transmission node that needs to be subjected to topology change and the first performance parameter used when the first transmission node is subjected to topology change are determined, and only the transmission node that needs to be subjected to topology change can be subjected to topology change, so that the change of the existing topology structure is small, and the primary topology structure and the secondary topology structure can be determined according to the first performance parameter, so that the performance requirement of the first transmission node can be met when topology change is performed. The first transmission node can correctly acquire or receive the data sent by the video source. And because the selected topological structure accords with the first performance parameter, a correct topological structure can be reasonably distributed for the transmission node according to the real-time state in the current topological structure.
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In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a video image processing system according to an embodiment;
FIG. 2 is a schematic diagram of a transmission link topology in one embodiment;
FIG. 3 is a flowchart illustrating a topology change method according to an embodiment;
FIG. 4 is a flowchart illustrating the step S204 according to an embodiment;
FIG. 5 is a flow diagram illustrating the determination of a first performance parameter, according to one embodiment;
FIG. 6 is a flowchart illustrating a process after step S208 in one embodiment;
FIG. 7 is a diagram of a standard frame structure in one embodiment;
FIG. 8 is a diagram illustrating a topology change frame structure in an embodiment;
fig. 9 is a schematic flowchart of topology change performed on a first transmission node through a topology change frame structure in an embodiment;
FIG. 10 is a block diagram showing a schematic configuration of a topology changing apparatus according to an embodiment;
FIG. 11 is a diagram showing an internal configuration of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the disclosure and are not intended to limit the disclosure.
It should be noted that the terms "first," "second," and the like in the description and claims herein and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments herein described are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.
In this document, the term "and/or" is only one kind of association relationship describing the associated object, meaning that three kinds of relationships may exist. For example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
As described in the background art, when nodes and/or video devices in a link change, which may include nodes and/or video terminals with different capabilities newly accessing or rebooting for accessing, or when nodes and/or video terminals with different capabilities in a topology are not in the existing topology due to reasons such as being removed or powered off, due to different transmission conditions of video data under different topology structures in the link, transmission between different topology levels is easily interfered by the outside, so that data is not synchronized between topology levels, and/or data cannot be correctly received through an existing reference clock and/or pixel clock. Meanwhile, when a new node and/or a video terminal is added into the link topology or a certain node and/or a video terminal is deleted from the link topology, a correct topology level cannot be reasonably allocated to the node and/or the video terminal according to the real-time state in the current topology structure, so that the access and/or removal of the node and/or the video terminal is completed under the condition that the existing topology is changed as little as possible.
Therefore, to solve the above problem, embodiments of the present disclosure provide a topology changing method, apparatus, computer device, and storage medium.
First, a video image processing system according to the following embodiments of the present disclosure is described, as shown in fig. 1, including: the device comprises an embedded control module, an FPGA module, an external storage module, a quick storage module, a peripheral module, a video interface physical layer implementation module and a video transmission link.
The embedded control module can use any embedded chip and system, and is mainly responsible for initiating signaling interaction, such as reading/writing a register, enabling/closing a video display module, peripheral control, parameter setting of the video display module and the like. The FPGA module is mainly responsible for implementing the implementation parts which need a large amount of data processing and low round-trip delay (latency) such as storage control, peripheral control, video interface IP core implementation and the like. The external storage module is mainly responsible for storing original data streams of video images needing to be displayed in the video image processing system, and the part is applied to storage media such as NandFlash, SSD and the like, but not limited to the storage media. The fast storage module is used in an implementation process that requires a large amount of data processing and low round-trip delay (latency) inside an FPGA module, and in order to reduce the delay and delay storage, the module applies a fast and low-delay physical device, such as DDR3, but is not limited thereto. The peripheral modules include GPIO (General-purpose input/output), UART (Universal Asynchronous Receiver/Transmitter), USB (Universal Serial Bus), network port, and the like, but are not limited thereto. The video interface physical layer implementation module is mainly responsible for the physical layer implementation required for driving the display module, such as, but not limited to, TX/RX (Transmitter/Receiver) -PHY of DisplayPort, DPHY of MIPI, and the like.
Furthermore, the FPGA module includes a bus interaction module, an MCU (micro controller Unit, micro control module) video stream preprocessing module, a video data stream transmission control module, a clock control module, an embedded soft core control module, a bus controller module, an internal storage controller module, an external control module, a display clock generator module, a video timing controller module, and a video interface IP core module. The bus interaction module is mainly responsible for the functions of selection, decision and the like of all other modules connected to the bus interaction module. The MCU video stream preprocessing module is mainly responsible for preprocessing and converting the video data stream input from the external storage module according to the format and parameter types set by the system so as to facilitate the post-processing. And the video data stream transmission control module is mainly responsible for controlling the time sequence, parameters and the like of the data stream after data stream preprocessing and conversion. And the clock control module is mainly responsible for generating and controlling a global clock in the video image processing system. The embedded soft core control module is a control core of the FPGA module, and is mainly responsible for core functions of timing control, parameter configuration, physical process implementation and the like of all modules inside the FPGA module, and the embedded soft core control module may be used in the implementation of the core functions, such as Xilinx MicroBlaze and the like, but is not limited thereto. The bus controller module is mainly responsible for controlling all modules connected with the bus interaction module, but is not limited to this. The video pattern processing module is mainly responsible for mode conversion, timing control and the like of video image data streams corresponding to the video interface IP core module, but is not limited to this. The internal storage controller module is mainly responsible for controlling the fast storage module, including but not limited to writing/reading of data stream, frame control, and the like. The peripheral control module is mainly responsible for controlling all the peripheral modules, including enabling/shutting down of the peripheral, controlling the working mode, and the like, but not limited thereto. The display clock generator module is mainly responsible for time sequence control of all modules, including but not limited to the video interface IP core module and the video interface physical layer implementation module. The video timing controller module is mainly responsible for data conversion, timing control and other processing when the data input from the video pattern processing module is transmitted to the video interface IP core module, but is not limited thereto.
The transmission link (video transmission link) includes: video source (video transmission source), transport node (embedded physical repeater, cable with source ID, detachable physical repeater, video sink, etc.), but is not limited thereto.
In the following, a network topology according to the present embodiment is explained, and fig. 2 shows a transmission link topology schematic diagram of the present disclosure, which includes a video source and is equivalent to a centralized control node. As shown in fig. 2, most of the transmission link topologies to which the present disclosure relates can include the following categories: video source → node 1 → video device 1, video device 2 and video device 3. The video device 3 can also be connected directly to a video source. I.e. video source → video device 3. Video source → node 2 → video device 4 and video device 5. Video source → node 3 → video device 6, video device 7, video device 8 and video device 9. Video source → video device 6. Video source → node 4 → node 5 → video device 11. The data transmission process involved in this embodiment may be sending video data for a video source to various nodes or video devices. And each node issues video data to each video device. Each video device displays video data. In some embodiments, the transport node may comprise a node and/or a video device. Taking the video device 3 as an example, the video device 3 has two topology structures, which are: video source → node 1 → video device 3 and video source → video device 3. Each node and/or video device may correspond to multiple transmission links and thus multiple topologies.
In an embodiment, as shown in fig. 3, a topology changing method is provided, which may be applied to the video image processing system shown in fig. 1, and may also be applied to other video image processing systems, and in this embodiment, the video image processing system shown in fig. 1 is used for illustration. The video image processing system comprises a plurality of transmission nodes, each transmission node corresponds to one or more transmission links, and each transmission node has a corresponding topological structure in each transmission link. The method may generally be performed by a video source, the method comprising the steps of:
s202, when a transmission node in the transmission link changes, determining a first transmission node that needs to perform topology change and a first performance parameter used when the first transmission node performs topology change.
The change may be that the transmission node is in a shutdown state in the transmission link or is not in a link topology for other reasons, such as not receiving any data or signaling sent by a video source, or that the transmission node is deleted in the transmission link or newly added to the transmission link. A topology change may generally be a way of adjusting the topology of the transmitting node in the transmission link. When the topology change is performed, it is usually necessary to reasonably select a transmission link for the transmission node of the topology change, and in some embodiments of the present disclosure, the first performance parameter may be an index for reasonably selecting a transmission link.
Specifically, when any one of the transmission nodes in the transmission link changes, it usually causes a corresponding change to occur to one or more transmission nodes, and the one or more transmission nodes usually need to perform topology change, so the one or more transmission nodes may be determined as the first transmission node that needs to perform topology change. One or more performance parameters may be selected as the first performance parameter.
S204, determining a main topological structure and a secondary topological structure according to the performance parameters of each topological structure in the transmission link and the first performance parameters, wherein the main topological structure comprises a plurality of secondary topological structures.
Where reference may be made to the transmission link topology as shown in fig. 2, the primary topology may be video source → node. The secondary topology may be a node → video device, and thus one or more secondary topologies may typically be included in the primary topology.
In particular, a performance parameter corresponding to each topology in the transmission link, i.e. the capability of each topology to support or transmit video data, may be determined. And selecting a primary topological structure and a secondary topological structure which accord with the first performance parameter according to the performance parameter of each topological structure and the first performance parameter. For example, there are four main topologies, A, B, C, D. The corresponding sub-topologies A1, A2 and A3 are included below a. The main topologies meeting the first performance parameter are a and B. The sub-topology that meets the first performance parameter is A1. The determined primary topology may be A, B and the secondary topology may be A1.
S206, determining a first topological structure of the first transmission node according to the primary topological structure and the secondary topological structure.
Specifically, after the primary topology and the secondary topology are determined, the determined primary topology and the secondary topology may need to be integrated, and finally the first topology of the first transmission node is determined. The secondary topology in the first topology is included in the primary topology in the first topology. For example, the primary and secondary topologies identified above may be A, B and A1. Since A1 is in A, the primary topology can be determined to be A and the secondary topology to be A1.
And S208, carrying out topology change on the first transmission node according to the first topology structure.
Specifically, after the final first topology structure is determined, the topology structure of the first transmission node in the transmission link is changed through the first topology structure.
In the topology changing method, when the transmission node in the transmission link changes, the first transmission node which needs topology changing and the first performance parameter used when the first transmission node performs topology changing are determined, and only the transmission node which needs to be changed can be subjected to topology changing, so that the existing topology structure is changed to be small, the main topology structure and the secondary topology structure can be determined according to the first performance parameter, and the performance requirement of the first transmission node can be met when topology changing is performed. The first transmission node can correctly acquire or accept the data sent by the video source. And because the selected topological structure accords with the first performance parameter, a correct topological structure can be reasonably distributed for the transmission node according to the real-time state in the current topological structure.
In one embodiment, as shown in fig. 4, the determining a primary topology and a secondary topology according to the performance parameter of each topology in the transmission link and the first performance parameter includes:
s302, determining a main topological structure according to at least one first performance parameter and the performance parameter of each main topological structure in the transmission link, wherein the main topological structure comprises each channel in the topological structure.
S304, determining a sub-topology structure according to at least one of the first performance parameters and the performance parameters of each sub-topology structure in the transmission link, the sub-topology structure comprising each topology level in each channel,
wherein the first performance parameter includes at least: reference clock, pixel clock, resolution, clock offset, frame rate, and the like. It is understood that the above-mentioned first performance parameter is only used for illustration, and the first performance parameter may also include others in practical application, and the first performance parameter is not limited thereto in this embodiment. The main topology comprises the channels in the topology, as shown in fig. 2, a channel can be simply understood as a transmission link to which each node and/or video terminal directly connected to a video source belongs, for example, nodes 1, 2, 3, and 4 belong to 4 different channels, respectively, and at the same time, are 2 nd level of the transmission link topology, and usually, the video source is 1 st level. The sub-topology comprises the respective topology levels in the respective channels as described above, and as shown in fig. 2, the video apparatuses 1, 2, 3 are the 3 rd level topology levels of channel 1. The performance parameter of the master topology may be a performance parameter corresponding to each channel, such as the performance parameters of nodes 1, 2, 3, 4. The performance parameter of the sub-topology may be a performance parameter of each topology level, such as a performance parameter of the video apparatus 1, 2, 3.
Specifically, the main topology of the first transmission node may be determined according to one or more first performance parameters and performance parameters corresponding to each main topology in the transmission link. The secondary topology of the outgoing node may also be determined from the one or more first performance parameters used in determining the primary topology and the performance parameters of each secondary topology in the transmission link.
When one performance parameter is used independently, the video source can be ensured to select a plurality of main topological structures or secondary topological structures; multiple performance parameters can also be used jointly to improve the topology change accuracy, but the selectable number of the video source for changing the topology level for the first transmission node is obviously reduced, or a more appropriate primary topology structure and a more appropriate secondary topology structure cannot be selected. Therefore, those skilled in the art can select different numbers of performance parameters according to actual situations to meet the requirements of different scenarios.
In the embodiment, the first performance parameter is used for selecting the primary topological structure and the secondary topological structure, so that the primary topological structure and the secondary topological structure can be reasonably determined, and the finally determined topological structure can meet the requirement of the first transmission node.
In an embodiment, as shown in fig. 5, determining the first performance parameter used when performing the topology change includes:
s402, selecting the performance parameters used when the first transmission node carries out topology change.
S404, measuring the performance parameters used when the topology change is carried out to obtain a measuring result.
S406, determining a first performance parameter according to the measurement result.
Wherein the measurement may generally be in terms of measuring specific data of performance parameters used by the transmitting node. For example, the performance parameter is selected to be a refresh rate of 60Hz. Sending the video data with the refresh rate of 60Hz to the transmission node, and feeding back the performance parameters of the video source video data after the transmission node structure reaches the video data. The performance parameter of the feedback may be a measurement.
In particular, one or more performance parameters may be selected for use by the first transmission node in making topology changes. And measuring one or more performance parameters to obtain a measurement result fed back by the transmission node. And comparing the measurement result with the performance parameter used when topology change is carried out to obtain a comparison result. If the comparison result is within the first performance parameter threshold range, the performance parameter used when the topology change is performed can be determined to be the first performance parameter. And if the comparison result is not in the first performance parameter threshold range, reselecting the performance parameter used when the topology is changed until the first performance parameter is determined.
In some exemplary embodiments, the first performance parameter threshold may be 0 in general to ensure that the first performance parameter can be accurately determined so as to accurately adjust the link topology of the first transmission node. In some preferred embodiments, the first performance parameter threshold value may generally ensure that the difference between the measurement result and the performance parameter used when the topology change is performed is small.
In this embodiment, a measurement result is obtained by measuring a performance parameter used in topology change, and a first performance parameter is determined according to the measurement result. The first performance parameter can be accurately determined, and the link topology structure of the first transmission node can be accurately adjusted.
In one embodiment, as shown in fig. 6, after the topology change is performed on the first transmission node according to the first topology, the method further includes:
s502, sending the video data to the first transmission node.
S504, whether the first transmission node has the capability of performance switching is judged.
S506, if the first transmission node has the capability of performance switching, the first transmission node displays the video data and sends the video data to a subordinate transmission node connected with the first transmission node.
S508, if the first transmission node does not have the capability of switching the performance, sending a signaling to a subordinate transmission node connected to the first transmission node, where the signaling is used to instruct the subordinate transmission node to display the cached video data.
The capability of performance switching may include: whether the transport node can process the re-received video data, whether the transport node can manage a lower transport node connected thereto, and the like. As shown in fig. 2, when the current transmission node is node 1, the lower transmission node may be any one of video devices 1, 2, and 3.
In particular, a video source may send video data to a first transport node. And judging whether the first transmission node has the capability of performance switching, and if the first transmission node has the capability of performance switching, proving that the first transmission node can process the video data and manage the subordinate transmission nodes. The first transmission node recalibrates the performance parameters and the received and displayed video data, and the video data can be transmitted to the next transmission node.
If the first transport node does not have the capability of performance switching, the video source may send signaling to the subordinate transport node. And the lower-level transmission node displays the received signaling by using the local cache video. The first transmission node receives the video data and displays the video data.
In this embodiment, after the video source sends the video data to the first transmission node, the display mode of the subordinate transmission node is adjusted according to whether the first transmission node has the capability of performance parameters, so as to meet the display requirement of the subordinate transmission node, and no influence is generated on other transmission nodes.
In one embodiment, after the first transport node displays the video data, the method further comprises:
and under the condition that the first transmission node fails to display the video data, carrying out topology change on the first transmission node again until the first transmission node successfully displays the video data.
Specifically, after the topology change is performed on the first transmission node and the video data is sent to the first transmission node, if the first transmission node fails to display the video data, the topology change of the first transmission node is proved to be failed, and if the determined first topology structure fails to enable the first transmission node to normally display the video data, the steps S202 to S206 are re-executed, and the topology change is performed on the first transmission node again until the first transmission node can successfully display the video data.
In this embodiment, whether the first transmission node successfully performs the topology change can be determined by whether the first transmission node normally displays the video data, and if the first transmission node does not successfully perform the topology change, the first transmission node is newly subjected to the topology change, so that the first transmission node can be ensured to normally display the video data, and the situation that the video data is not normally displayed after the topology change is performed is avoided.
The above embodiment only describes the operation of topology change, and how to perform topology change in the actual process is described in more detail below.
In an embodiment, when topology change is performed, the first transmission node is subjected to topology change by interacting with the first transmission node through a pre-constructed topology change frame structure, where the pre-constructed topology change frame structure is obtained by adding a functional time slot to a standard frame structure. As shown in fig. 7, a standard frame structure is shown, in which BS (Blanking Start), VB-ID (Vertical Blanking Identifier), mvid (timer value of Video data), naud (timer value of audio data), dummy Video (for Dummy data padding), BE (Blanking End), pixel data (for transmission of Video data), FS (Fill Start), fill Video (padding data for padding when data is insufficient), and FE (Fill End).
As shown in fig. 8, a topology change frame structure is shown, and the functional time slots at least include: the method comprises the following steps of (1) topology modification time slots, performance parameter identification time slots, main topology determination time slots, secondary topology determination time slots and topology confirmation time slots; as shown in fig. 9, the performing topology change on the first transmission node includes:
s602, adjusting the topology modification time slot in the topology modification frame structure to be enabled, wherein the topology modification time slot is used for determining whether to perform topology modification.
S604, identifying time slots according to the performance parameters in the topology change frame structure, and determining a first performance parameter used when the first transmission node performs topology change.
And S606, according to the first performance parameter and the performance parameter of each topology structure in the transmission link, adjusting a primary topology determination timeslot and a secondary topology determination timeslot in the topology change frame structure, where the primary topology determination timeslot is used to determine a channel to be changed by the first transmission node, and the secondary topology determination timeslot is used to determine a topology level to be changed by the first transmission node.
S608, adjusting a topology confirmation time slot in the topology change frame structure according to the channel to be changed of the first transmission node and the topology level to be changed of the first transmission node, where the topology confirmation time slot is used to determine a final channel and a final topology level.
S610, performing topology change on the first transmission node according to the topology confirmation timeslot.
Specifically, the first transmission node is determined when the video source identifies a transmission node change in the transmission link. The video source adjusts the topology modification time slot in the topology modification frame structure to be enabled, the topology modification time slot is used for enabling/closing topology modification, when no topology modification requirement is displayed normally, the topology modification time slot is in a closed state, a standard frame structure is enabled to transmit, and all other newly added function time slots are invalid. When a topology change is required, the video source first enables a topology modification timeslot. After the topology modification time slot is started, all the other newly added time slots are effective, and the video source can identify the time slot according to the performance parameters in the topology change frame structure to determine the first performance parameters used when the first transmission node carries out topology change. The performance parameter identification time slot may typically include a first performance parameter used by the first transmission node when performing the topology change. This first performance parameter is typically pre-set in the performance parameter identification slot by the video source. The video source may adjust a primary topology determination timeslot and a secondary topology determination timeslot in the topology change frame structure according to the first performance parameter and the performance parameter of the topology structure in the transmission link, where the primary topology determination timeslot is used to determine a channel to be changed by the first transmission node, and the video source may select one or more channels as the channel to be changed by the first transmission node. The secondary topology determining time slot is used for determining the topology level to be changed of the first transmission node, and the video source may also select one or more topology levels as the topology level to be changed. After the primary topological structure and the secondary topological structure are determined, a final topological structure is determined according to the channel to be changed and the topological level to be changed, and the topological confirmation time slot in the topological change frame structure is adjusted according to the final topological structure. And changing the first transmission node according to the final topological structure in the topological confirmation time slot.
It will be appreciated that in some embodiments of the present disclosure, the location of the functional timeslots in the standard frame structure may be determined based on practical circumstances. Wherein the functional slots may be placed all in one slot of the standard frame structure or in a plurality of slots of the standard frame structure. In some preferred embodiments, the topology modification time slot and the performance parameter identification time slot may be placed in one time slot to reduce the signaling load and thereby improve the payload and throughput.
In this embodiment, the topology change is performed on the first transmission node through the topology change frame structure, and the topology change frame structure is obtained in the new functional timeslot in the standard frame structure and is compatible with the standard frame structure.
In one embodiment, after the topology change is performed on the first transmission node according to the topology confirmation time slot, the method further includes:
and adjusting the topology modification time slot in the topology modification frame structure to be forbidden, wherein the functional time slot is invalid under the condition that the topology modification time slot is forbidden, and transmitting data to each transmission node through a standard frame structure.
Specifically, after topology change is performed, the topology modification time slot is adjusted to be forbidden, all other function time slots are invalid, all transmission nodes in the link topology are notified through signaling, and video data transmission is performed subsequently by using a standard frame structure.
In some embodiments, the video source may further interact with the transport node in the form of a read-write field, and may interact with the transport node through a topology change command, where the topology change command may include: and the topology change identification field is used for starting/forbidding a topology change frame structure, and when the topology change frame structure is forbidden, a standard frame structure is used. And the performance parameter selection and feedback field is used for selecting the performance parameters used when the first transmission node carries out topology change and feeding back the measurement result. The capability feedback field is used for the transmission node to feed back whether the capability of the performance handover is available. And the topology change confirmation field is used for feeding back a result after the topology change is completed.
It should be understood that, although the steps in the flowcharts related to the embodiments as described above are sequentially displayed as indicated by arrows, the steps are not necessarily performed sequentially as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in the flowcharts related to the embodiments described above may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the execution order of the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.
Based on the same inventive concept, the disclosed embodiment also provides a topology changing device for implementing the topology changing method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so specific limitations in one or more embodiments of the topology changing device provided below can be referred to the limitations of the topology changing method in the foregoing, and details are not described here.
In one embodiment, as shown in fig. 10, a topology changing apparatus 1000 is provided, which is applied to a video image processing system, where the video image processing system includes a plurality of transmission nodes, each transmission node corresponds to one or more transmission links, and each transmission node has a corresponding topology structure in the transmission link, and the apparatus includes: a change preparation module 1002, a first structure determination module 1004, a second structure determination module 1006, and a topology change module 1008, wherein:
a change preparation module 1002, configured to determine, when a transmission node in the transmission link changes, a first transmission node that needs to perform topology change and a first performance parameter used when the first transmission node performs topology change;
a first structure determining module 1004, configured to determine a main topology structure and a secondary topology structure according to the performance parameter of each topology structure in the transmission link and the first performance parameter, where the main topology structure includes multiple secondary topology structures;
a second structure determining module 1006, configured to determine a first topology structure of the first transmission node according to the primary topology structure and the secondary topology structure;
a topology changing module 1008, configured to perform topology changing on the first transmission node according to the first topology structure.
In one embodiment of the apparatus, the first structure determining module 1004 comprises: a main topology determining module, configured to determine a main topology structure according to at least one of the first performance parameters and a performance parameter of each main topology structure in the transmission link, where the main topology structure includes each channel in the topology structure.
And the secondary topology determining module is used for determining a secondary topology structure according to at least one item of the first performance parameter and the performance parameter of each secondary topology structure in the transmission link, wherein the secondary topology structure comprises each topology level in each channel. Wherein the first performance parameter comprises at least: reference clock, pixel clock, resolution, clock offset, and frame rate.
In one embodiment of the apparatus, the change preparation module 1002 includes: and the performance parameter selection module is used for selecting the performance parameters used when the first transmission node carries out topology change.
And the measurement module is used for measuring the performance parameters used during topology change to obtain a measurement result.
And the parameter determining module is used for determining a first performance parameter according to the measuring result.
In one embodiment of the apparatus, the apparatus further comprises: and the video sending module is used for sending the video data to the first transmission node.
And the capability judging module is used for judging whether the first transmission node has the capability of performance switching.
And the first processing module is used for displaying the video data by the first transmission node and sending the video data to a subordinate transmission node connected with the first transmission node if the first transmission node has the capability of switching the performance.
And the second processing module is used for sending a signaling to a subordinate transmission node connected with the first transmission node if the first transmission node does not have the capability of performance switching, wherein the signaling is used for indicating the subordinate transmission node to display the cached video data. Wherein the capability of the performance switching at least comprises: processes the received video data and manages the lower level transmission node connected thereto.
In an embodiment of the apparatus, the topology changing module 1008 is further configured to, in a case that the first transmission node fails to display the video data, perform topology changing again on the first transmission node until the first transmission node succeeds in displaying the video data.
In one embodiment of the apparatus, the apparatus further comprises: and the frame structure changing module is used for carrying out topology change on the first transmission node through interaction between a pre-constructed topology change frame structure and the first transmission node when topology change is carried out, wherein the pre-constructed topology change frame structure is obtained by adding functional time slots in a standard frame structure.
In one embodiment of the apparatus, the functional time slot comprises at least: the method comprises the following steps of (1) topology modification time slots, performance parameter identification time slots, main topology determination time slots, secondary topology determination time slots and topology confirmation time slots; the frame structure changing module comprises:
and the first time slot adjusting module is used for adjusting the topology modification time slot in the topology modification frame structure to be enabled, and the topology modification time slot is used for determining whether to perform topology modification.
And the time slot parameter determining module is used for identifying time slots according to the performance parameters in the topology change frame structure and determining a first performance parameter used when the first transmission node performs topology change.
And a second time slot adjusting module, configured to adjust a primary topology determining time slot and a secondary topology determining time slot in the topology change frame structure according to the first performance parameter and a performance parameter of each topology structure in the transmission link, where the primary topology determining time slot is used to determine a channel to be changed by the first transmission node, and the secondary topology determining time slot is used to determine a topology level to be changed by the first transmission node.
And a third time slot adjusting module, configured to adjust a topology confirmation time slot in the topology change frame structure according to the channel to be changed of the first transmission node and the topology level to be changed of the first transmission node, where the topology confirmation time slot is used to determine a final channel and a final topology level.
And the time slot changing module is used for carrying out topology change on the first transmission node according to the topology confirmation time slot.
In one embodiment of the apparatus, the apparatus further comprises: and the time slot disabling module is used for adjusting the topology modification time slot in the topology modification frame structure to be disabled, and under the condition that the topology modification time slot is disabled, the functional time slot is invalid, and the data is transmitted to each transmission node through a standard frame structure.
The modules in the topology changing apparatus may be wholly or partially implemented by software, hardware, and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 11. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer device is used for storing the first performance parameter. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a topology altering method.
Those skilled in the art will appreciate that the architecture shown in FIG. 11 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices in which the disclosed aspects apply, as a particular computing device may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the steps of the above-described method embodiments when executing the computer program.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
In an embodiment, a computer program product is provided, comprising a computer program which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, databases, or other media used in the embodiments provided by the present disclosure may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include a Read-Only Memory (ROM), a magnetic tape, a floppy disk, a flash Memory, an optical Memory, a high-density embedded nonvolatile Memory, a resistive Random Access Memory (ReRAM), a Magnetic Random Access Memory (MRAM), a Ferroelectric Random Access Memory (FRAM), a Phase Change Memory (PCM), a graphene Memory, and the like. Volatile Memory can include Random Access Memory (RAM), external cache Memory, and the like. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others. The databases involved in embodiments provided by the present disclosure may include at least one of relational and non-relational databases. The non-relational database may include, but is not limited to, a block chain based distributed database, and the like. The processors referred to in the embodiments provided in this disclosure may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic, quantum computing based data processing logic, etc., without limitation.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several implementation modes of the present disclosure, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the present disclosure. It should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the concept of the present disclosure, and these changes and modifications are all within the scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the appended claims.
Claims (11)
1. A topology changing method is applied to a video image processing system, wherein the video image processing system comprises a plurality of transmission nodes, each transmission node corresponds to one or more transmission links, and each transmission node has a corresponding topology structure in the transmission link, and the method comprises the following steps:
when a transmission node in the transmission link changes, a first transmission node which needs topology change and a first performance parameter used when the first transmission node changes the topology are determined;
determining a main topological structure and a secondary topological structure according to the performance parameter of each topological structure in the transmission link and the first performance parameter, wherein the main topological structure comprises a plurality of secondary topological structures;
determining a first topological structure of the first transmission node according to the primary topological structure and the secondary topological structure;
and carrying out topology change on the first transmission node according to the first topology structure.
2. The method of claim 1, wherein determining a primary topology and a secondary topology from the performance parameters of each topology in the transmission link and the first performance parameter comprises:
determining a main topological structure according to at least one first performance parameter and a performance parameter of each main topological structure in the transmission link, wherein the main topological structure comprises each channel in the topological structure;
determining a secondary topology structure according to at least one of the first performance parameters and the performance parameters of each secondary topology structure in the transmission link, the secondary topology structure comprising each topology level in each channel;
wherein the first performance parameter comprises at least: reference clock, pixel clock, resolution, clock offset, and frame rate.
3. The method of claim 1, wherein determining the first performance parameter for use in making the topology change comprises:
selecting a performance parameter used when the first transmission node performs topology change;
measuring the performance parameters used during topology change to obtain a measurement result;
determining a first performance parameter based on the measurement.
4. The method of claim 1, wherein after the topology change to the first transmission node according to the first topology, the method further comprises:
sending video data to the first transmission node;
judging whether the first transmission node has the capability of performance switching;
if the first transmission node has the capability of switching the performance, the first transmission node displays the video data and sends the video data to a lower transmission node connected with the first transmission node;
if the first transmission node does not have the capability of performance switching, sending a signaling to a lower transmission node connected with the first transmission node, wherein the signaling is used for indicating the lower transmission node to display the cached video data;
wherein the capability of the performance switch at least comprises: processes the received video data and manages the lower level transmission node connected thereto.
5. The method of claim 4, wherein after the first transport node displays the video data, the method further comprises:
and under the condition that the first transmission node fails to display the video data, carrying out topology change on the first transmission node again until the first transmission node successfully displays the video data.
6. The method of claim 1, further comprising:
when topology change is carried out, the first transmission node is subjected to topology change through interaction of a pre-constructed topology change frame structure and the first transmission node, wherein the pre-constructed topology change frame structure is obtained by adding a functional time slot in a standard frame structure.
7. The method of claim 6, wherein the functional time slots comprise at least: the method comprises the following steps of (1) topology correction time slots, performance parameter identification time slots, main topology determination time slots, secondary topology determination time slots and topology confirmation time slots; the performing topology change on the first transmission node includes:
adjusting a topology modification time slot in the topology modification frame structure to be enabled, wherein the topology modification time slot is used for determining whether to perform topology modification;
identifying a time slot according to the performance parameters in the topology change frame structure, and determining a first performance parameter used when the first transmission node performs topology change;
adjusting a main topology determination time slot and a secondary topology determination time slot in the topology change frame structure according to the first performance parameter and the performance parameter of each topology structure in the transmission link, wherein the main topology determination time slot is used for determining a channel to be changed of the first transmission node, and the secondary topology determination time slot is used for determining a topology level to be changed of the first transmission node;
adjusting a topology confirmation time slot in the topology change frame structure according to the channel to be changed of the first transmission node and the topology level to be changed of the first transmission node, wherein the topology confirmation time slot is used for determining a final channel and a topology level;
and carrying out topology change on the first transmission node according to the topology confirmation time slot.
8. The method of claim 7, wherein after the topology change is made to the first transmission node according to the topology confirmation time slot, the method further comprises:
and adjusting the topology modification time slot in the topology modification frame structure to be forbidden, wherein the functional time slot is invalid under the condition that the topology modification time slot is forbidden, and transmitting data to each transmission node through a standard frame structure.
9. A topology changing device is applied to a video image processing system, wherein the video image processing system includes a plurality of transmission nodes, each transmission node corresponds to one or more transmission links, and each transmission node has a corresponding topology structure in the transmission link, and the device includes:
a change preparation module, configured to determine, when a transmission node in the transmission link changes, a first transmission node that needs to perform topology change and a first performance parameter used when the first transmission node performs topology change;
the first structure determining module is used for determining a main topological structure and a secondary topological structure according to the performance parameter of each topological structure in the transmission link and the first performance parameter, wherein the main topological structure comprises a plurality of secondary topological structures;
a second structure determining module, configured to determine a first topology structure of the first transmission node according to the primary topology structure and the secondary topology structure;
and the topology changing module is used for carrying out topology changing on the first transmission node according to the first topology structure.
10. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 8.
11. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 8.
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