CN117009087A - Image output method, device, equipment and storage medium - Google Patents
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
- G06F9/50—Allocation of resources, e.g. of the central processing unit [CPU]
- G06F9/5005—Allocation of resources, e.g. of the central processing unit [CPU] to service a request
- G06F9/5027—Allocation of resources, e.g. of the central processing unit [CPU] to service a request the resource being a machine, e.g. CPUs, Servers, Terminals
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F5/00—Methods or arrangements for data conversion without changing the order or content of the data handled
- G06F5/06—Methods or arrangements for data conversion without changing the order or content of the data handled for changing the speed of data flow, i.e. speed regularising or timing, e.g. delay lines, FIFO buffers; over- or underrun control therefor
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/46—Multiprogramming arrangements
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Abstract
The invention discloses an image output method, a device, equipment and a storage medium, which relate to the technical field of computers and comprise the following steps: detecting the current state of a first data queue to obtain a first queue state when receiving frame header data of a current frame image; if the first queue state indicates that the current first data queue is an empty queue, writing the data in the current frame image into the first data queue, and reading the written data of the current frame image from the first data queue and writing the written data into a preset memory; in the process of processing the current frame image by utilizing the first data queue, monitoring whether the first data queue is fully written in real time; if the current frame image is full, the unprocessed data in the current frame image is written into a second data queue, and the written data of the current frame image is read out from the second data queue and written into a preset memory. The invention processes the image data by using the two data queues, can reduce the frame loss rate and reduce the transmission of invalid data.
Description
Technical Field
The present invention relates to the field of computer technologies, and in particular, to an image output method, apparatus, device, and storage medium.
Background
Currently, the BMC (Baseboard Management Controller ) can monitor the status of the server, and can transmit local image information to the far end through the network, thereby realizing the function of remote management control, but in the current BMC chip image transmission mechanism, once the data FIFO (First Input First Output) is full, the current frame image is lost, the possible full time of the data FIFO is not long, only a few clock cycles are required, only a few data is lost, the far end user is not affected, however, if a few continuous frames of data exist, the situation that one frame image at the far end is not obtained, the display image is not updated at all times, the frame loss rate is too high, and the lost frame data is to be written into the DDR SDRAM (Double Data Rate Synchronous Dynamic Random Access Memory, double rate synchronous dynamic random access memory), only the information is not provided to the driver, the software is not read, namely, the frequent frame loss can result in the transmission of a large amount of invalid data, thereby wasting DDR memory and DDR bus bandwidth, wherein DDR SDRAM is also called DDR bus bandwidth.
In summary, the image output far-end display of the related art has the problems of high image frame loss rate and waste of DDR memory and DDR bus bandwidth. Therefore, how to provide a solution to the above technical problem is a problem that a person skilled in the art needs to solve at present.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an image output method, apparatus, device, and storage medium, which can reduce the frame loss rate and reduce the transmission of invalid data. The specific scheme is as follows:
in a first aspect, the present invention discloses an image output method, including:
when frame head data of a current frame image are received, detecting the current state of a first data queue to obtain a corresponding first queue state;
if the first queue state indicates that the current first data queue is an empty queue, starting an operation of processing the current frame image by using the first data queue so as to write data in the current frame image into the first data queue, and reading out the written data of the current frame image from the first data queue and writing the written data into a preset memory;
monitoring whether the first data queue is fully written in real time in the process of processing the current frame image by utilizing the first data queue;
And if the first data queue is monitored to be fully written, starting an operation of processing unprocessed data in the current frame image by using a second data queue so as to write the unprocessed data in the current frame image into the second data queue, and reading the written data of the current frame image from the second data queue and writing the written data into the preset memory.
Optionally, after the detecting the current state of the first data queue obtains the corresponding first queue state, the method further includes:
if the first queue state indicates that the current first data queue is not an empty queue, detecting the current state of the second data queue to obtain a corresponding second queue state;
if the second queue state indicates that the current second data queue is an empty queue, starting an operation of processing the current frame image by using the second data queue, so as to sequentially write data in the current frame image into the second data queue from the frame header data, count the data currently written into the second data queue to obtain a first count value, and detecting whether the current first data queue has become an empty queue again;
If the fact that the current first data queue is changed into an empty queue again is detected, judging whether the data of the current frame image are completely written into the data queue or not;
and if the data of the current frame image are not completely written into the data queue, starting an operation of processing unprocessed data in the current frame image by using the first data queue so as to write the current unprocessed data in the current frame image into the first data queue, and executing a data reading operation for the current frame image so as to read and write the data corresponding to the first count value from the second data queue into the preset memory, and then reading and writing the data of the current frame image stored in the first data queue into the preset memory.
Optionally, after detecting the current state of the second data queue to obtain the corresponding second queue state, the method further includes:
and if the second queue state indicates that the current second data queue is not an empty queue, continuing to process the residual data which is not written into the data queue in the previous frame image, and discarding the current frame image.
Optionally, the image output method further includes:
And if the first data queue is not fully written, continuing to write the data in the current frame image into the first data queue, reading the written data of the current frame image from the first data queue and writing the written data into a preset memory, and correspondingly updating the value in a state queue after the processing of the current frame image is finished.
Optionally, after the operation of processing the unprocessed data in the current frame image by using the second data queue, the method further includes:
in the process of processing unprocessed data in the current frame image by utilizing a second data queue, monitoring whether the second data queue is fully written or not in real time;
and if the second data queue is fully written and the current first data queue does not become an empty queue again, counting the data which is not written into the data queue normally currently in the current frame image and the data which is written into the second data queue to obtain a second count value until the fact that the current first data queue becomes an empty queue again is detected.
Optionally, the image output method further includes:
judging whether the second count value reaches a first preset threshold value or not;
if the second count value reaches the first preset threshold value, discarding the data which cannot be written into the data queue currently in the current frame image, setting a frame state flag of the current frame image as a first preset state value representing incomplete data of the current frame image, and stopping updating the value in the state queue;
if the second count value does not reach the first preset threshold value, after all the data in the first data queue and the second data queue are read out and written into the preset memory in sequence, determining the target number of preset characters based on the second count value and the depth of the second data queue, and writing the preset characters of the target number into the preset memory.
Optionally, the image output method further includes:
recording the times of the second data queue being written up in the process of processing the current frame image;
judging whether the times reach a second preset threshold value or not;
if the times reach the second preset threshold value, discarding the current frame image, setting a frame state flag of the current frame image as a first preset state value representing the incompleteness of the current frame image, and stopping updating the value in a state queue;
And if the times do not reach the second preset threshold value, reserving the current frame image, setting a frame state mark of the current frame image as a second preset state value representing the integrity of the current frame image, and correspondingly updating the value in the state queue.
In a second aspect, the present invention discloses an image output apparatus comprising:
the first detection module is used for detecting the current state of the first data queue to obtain a corresponding first queue state when receiving frame header data of the current frame image;
the first reading and writing module is used for starting the operation of processing the current frame image by using the first data queue when the first queue state indicates that the current first data queue is empty, so as to write the data in the current frame image into the first data queue, and reading the written data of the current frame image from the first data queue and writing the written data into a preset memory;
the first monitoring module is used for monitoring whether the first data queue is fully written or not in real time in the process of processing the current frame image by utilizing the first data queue;
And the second reading and writing module is used for starting the operation of processing the unprocessed data in the current frame image by using a second data queue when the first data queue is monitored to be full, writing the unprocessed data in the current frame image into the second data queue, and reading the written data of the current frame image from the second data queue and writing the written data into the preset memory.
In a third aspect, the present invention discloses an electronic device, comprising:
a memory for storing a computer program;
a processor for executing the computer program to implement the steps of the previously disclosed image output method.
In a fourth aspect, the present invention discloses a computer-readable storage medium for storing a computer program; wherein the computer program when executed by a processor implements the steps of the previously disclosed image output method.
It can be seen that the present invention provides an image output method, comprising: when frame head data of a current frame image are received, detecting the current state of a first data queue to obtain a corresponding first queue state; if the first queue state indicates that the current first data queue is an empty queue, starting an operation of processing the current frame image by using the first data queue so as to write data in the current frame image into the first data queue, and reading out the written data of the current frame image from the first data queue and writing the written data into a preset memory; monitoring whether the first data queue is fully written in real time in the process of processing the current frame image by utilizing the first data queue; and if the first data queue is monitored to be fully written, starting an operation of processing unprocessed data in the current frame image by using a second data queue so as to write the unprocessed data in the current frame image into the second data queue, and reading the written data of the current frame image from the second data queue and writing the written data into the preset memory. Therefore, when the frame head data of the current frame image is received and the first data queue is detected to be an empty queue, the invention writes the data in the current frame image into the first data queue, and when the first data queue is detected to be full, writes the unprocessed data in the current frame image into the second data queue, thereby avoiding the situation of frame loss caused by the full writing of the first data queue, namely, reducing the frame loss rate and reducing the transmission of invalid data by using two data queues to process the image data.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an application scenario of an existing BMC chip image transmission mechanism disclosed in the present invention;
FIG. 2 is a schematic diagram of a conventional image output control sub-module according to the present disclosure;
FIG. 3 is a flow chart of an image output method according to the present disclosure;
FIG. 4 is a flowchart of a specific image output method disclosed in the present invention;
FIG. 5 is a flowchart of a specific image output method disclosed in the present invention;
FIG. 6 is a schematic diagram of an improved image output control sub-module according to the present disclosure;
FIG. 7 is a schematic diagram of an image output apparatus according to the present disclosure;
fig. 8 is a block diagram of an electronic device according to the present disclosure.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
At present, in a BMC chip image transmission mechanism, once a data FIFO is full, a current frame image is lost, the full time of the data FIFO is not long, only a few data can be lost in a few clock cycles, and the use of a far-end user is not affected, however, if the condition exists in continuous frames of data, a far-end image cannot be obtained, a display image is not updated all the time, the frame loss rate is too high, and a large amount of invalid data is transmitted due to frequent frame loss, so that the waste of DDR memory and DDR bus bandwidth is caused. Therefore, the invention provides an image output scheme which can reduce the frame loss rate and invalid data transmission, thereby optimizing the image transmission mechanism in the BMC chip.
It should be noted that, referring to the application scenario of the existing BMC chip image transmission mechanism, as shown in fig. 1, the information at HOST (HOST) end is transferred to a VGA module inside the BMC chip through PCIE (Peripheral Component Interconnect Express, i.e. bus and interface standard), that is, through PCI Express, the VGA module interacts with DDR, and is processed and converted into DVI (Digital Visual Interface, digital video interface) signals, and displayed on a local display, if the original image data is to be displayed on the remote display, the image data can be obtained through the DVI interface or AXI (Advanced eXtensible Interface ) bus, and then is transferred to the remote display through a JPEG (Joint Photographic Experts Group, joint image special group, i.e. image compression standard) module, for example, through EMAC (Ethernet Media Access Controller ), and according to the requirements of the remote display, the original image data in YUV format or the compressed image data is required to be provided by the JPEG module, the compressed image data amount is relatively small, and the original image data amount is huge, if the original image data in YUV format is required to be displayed on the remote display, and the frame rate is required to be controlled in the transmission process, and the frame information is required to be read out from the remote display module, and the image data is required to be read out from the image display module, and the image display has the image data in the frame format is required to be read out from the remote display. According to the configuration of the user, the output image data has two formats, one is the original image data in the uncompressed YUV format, and the other is the compressed image data after compression, such as JPEG format, wherein the structure of the image output control submodule is shown in FIG. 2, the data FIFO is used for receiving the image data, the format of the image data can be YUV format or JPEG format, when the data FIFO is Full, namely when the Full signal is pulled high, the writing of the data into the data FIFO is stopped immediately, and the frame status flag of the current frame data is set to be '1' to indicate that the current frame data is incomplete; if the data FIFO is not Full, i.e. the current frame data has no Full signal in the process of writing into the data FIFO until the frame end data, the frame status flag of the current frame data is set to '2' to indicate that the current frame data is complete, a read-write control unit is used for controlling the read-write of the data FIFO, when the frame head information is detected, the data in the data FIFO is read out by an AXI Master write time sequence control unit and converted into an AXI time sequence, then written into the DDR, when the frame end data of each frame is sent, whether the current frame is a complete frame or an incomplete frame is judged according to the frame status flag, for the complete frame, the frame information is updated into the status FIFO for driving the read, and for the incomplete frame, the frame information is not updated into the status FIFO to indicate that the frame data is dropped.
The embodiment of the invention discloses an image output method, which is shown in fig. 3, and comprises the following steps:
step S11: and when receiving the frame header data of the current frame image, detecting the current state of the first data queue to obtain a corresponding first queue state.
In this embodiment, when receiving a new frame of image data, the current state of the first data queue is first detected to obtain a corresponding first queue state so as to determine whether the first data queue is an empty queue.
Step S12: and if the first queue state indicates that the current first data queue is an empty queue, starting an operation of processing the current frame image by using the first data queue so as to write the data in the current frame image into the first data queue, and reading out the written data of the current frame image from the first data queue and writing the written data into a preset memory.
In this embodiment, when frame header data of a current frame image is received, after detecting a current state of a first data queue to obtain a corresponding first queue state, if the first queue state indicates that the current first data queue is an empty queue, an operation of processing the current frame image by using the first data queue is started, so that data in the current frame image is written into the first data queue, and the written data of the current frame image is read out from the first data queue and written into a preset memory. It can be understood that when a new frame of image data is received and the first data queue is an empty queue, the frame of data is directly written into the first data queue, then the written data of the current frame of image is read out from the first data queue and written into a preset memory, specifically, the read data is converted into a target on-chip bus protocol time sequence, the converted image data is written into a double-rate synchronous dynamic random access memory through the target on-chip bus, for example, the data is read through an aximaster write time sequence control module, the read data is converted into an AXI write time sequence, and the converted data is written into a DDR through an AXI bus.
Step S13: and monitoring whether the first data queue is fully written in real time in the process of processing the current frame image by utilizing the first data queue.
It can be understood that, in the process of writing the data in the current frame image into the first data queue, whether the first data queue is full or not is monitored in real time.
Step S14: and if the first data queue is monitored to be fully written, starting an operation of processing unprocessed data in the current frame image by using a second data queue so as to write the unprocessed data in the current frame image into the second data queue, and reading the written data of the current frame image from the second data queue and writing the written data into the preset memory.
In this embodiment, in real time, whether the first data queue is full is monitored, if it is monitored that the first data queue is full, an operation of processing unprocessed data in the current frame image by using a second data queue is started, so that unprocessed data in the current frame image is written into the second data queue, and the written data of the current frame image is read out from the second data queue and written into the preset memory. It can be understood that, in the process of writing the data in the current frame image into the first data queue, if the first data queue is already full, the unprocessed data in the current frame image is written into the second data queue, so that the situation of frame loss caused by the full writing of the first data queue can be avoided.
It should be noted that, the first data queue and the second data queue are both used for receiving image data, and the format of the image data may be YUV format or JPEG format, the first data queue and the second data queue may be first-in first-out queues, and the data queues may be fully written because the read-write speeds of the data queues are inconsistent, and the authority of the DDR is not given to the JPEG module at all times.
In this embodiment, in the process of processing the current frame image by using the first data queue, if it is monitored that the first data queue is not fully written, the step of writing the data in the current frame image into the first data queue, reading the written data of the current frame image from the first data queue, writing the written data into a preset memory, and after the current frame image processing is finished, correspondingly updating the value in the state queue. It can be understood that, in the process of writing the data in the current frame image into the first data queue, if the first data queue is not fully written, the first data queue is subjected to the read-write operation until the current frame image is finished, the value in the state queue is updated, and then the next frame image is waited to be received.
In the embodiment of the invention, when the frame head data of the current frame image is received and the first data queue is detected to be an empty queue, the data in the current frame image is written into the first data queue, and when the first data queue is detected to be full, the unprocessed data in the current frame image is written into the second data queue, so that the situation of frame loss caused by the full writing of the first data queue can be avoided, namely, the frame loss rate can be reduced and the transmission of invalid data can be reduced by using two data queues to process the image data.
Referring to fig. 4, an embodiment of the present invention discloses a specific image output method, and compared with the previous embodiment, the present embodiment further describes and optimizes the technical solution.
Step S21: and when receiving the frame header data of the current frame image, detecting the current state of the first data queue to obtain a corresponding first queue state.
Step S22: and if the first queue state indicates that the current first data queue is not an empty queue, detecting the current state of the second data queue to obtain a corresponding second queue state.
In this embodiment, when frame header data of a current frame image is received, after detecting a current state of a first data queue to obtain a corresponding first queue state, if the first queue state indicates that the current first data queue is not an empty queue, detecting the current state of a second data queue to obtain a corresponding second queue state. It can be understood that when the frame header data of the current frame image is received and it is detected that the first data queue is not empty, the data in the current frame image is not written into the first data queue, but the current state of the second data queue is further detected to obtain a corresponding second queue state, so as to determine whether to write the data in the current frame image into the second data queue based on the second queue state.
Step S23: and if the second queue state indicates that the current second data queue is an empty queue, starting an operation of processing the current frame image by using the second data queue, sequentially writing data in the current frame image into the second data queue from the frame head data, counting the data currently written into the second data queue to obtain a first count value, and detecting whether the current first data queue has become an empty queue again.
In this embodiment, when frame header data of a current frame image is received, detecting that a first data queue is not an empty queue and detecting that a second data queue is an empty queue, an operation of processing the current frame image by using the second data queue is started, so as to sequentially write data in the current frame image into the second data queue from the frame header data and count the data currently written into the second data queue to obtain a first count value, and detecting whether the current first data queue has become an empty queue again. It can be understood that in the process of processing the current frame image by using the second data queue, the operation of reading the data of the last frame image written in from the first data queue and writing the data into the preset memory is performed at the same time, so that in the process of sequentially writing the data in the current frame image into the second data queue, the first data queue has become empty again, so that it is required to detect whether the current first data queue has become empty again, and if the second queue state indicates that the current second data queue is not empty, the processing of the remaining data of the last frame image, which is not written in, is continued, and the current frame image is discarded, so that the situation that when a new frame image arrives, the data of the last frame image is not processed yet and frame loss is caused can be avoided.
Step S24: if the fact that the current first data queue is changed into an empty queue again is detected, judging whether the data of the current frame image are completely written into the data queue or not.
It can be understood that in the process of sequentially writing the data in the current frame image into the second data queue, it is detected that the current first data queue has become an empty queue again, and it is also required to determine whether the data of the current frame image has been written into the data queue entirely.
Step S25: and if the data of the current frame image are not completely written into the data queue, starting an operation of processing unprocessed data in the current frame image by using the first data queue so as to write the current unprocessed data in the current frame image into the first data queue, and executing a data reading operation for the current frame image so as to read and write the data corresponding to the first count value from the second data queue into the preset memory, and then reading and writing the data of the current frame image stored in the first data queue into the preset memory.
It may be understood that, when receiving frame header data of a current frame image, detecting that a first data queue is not an empty queue, detecting that a second data queue is an empty queue, sequentially writing data in the current frame image into the second data queue from the frame header data, counting data currently written into the second data queue to obtain a first count value, if it is detected that the first data queue has become an empty queue again, writing currently unprocessed data in the current frame image into the first data queue, and then, when performing a data reading operation for the current frame image, reading data corresponding to the first count value from the second data queue, writing the data of the current frame image stored in the first data queue into the preset memory, and then reading and writing the data of the current frame image stored in the first data queue into the preset memory. For example, when receiving frame header data of a current frame image, detecting that data FIFO a is not an empty queue and detecting that data FIFO B is an empty queue, sequentially writing data in the current frame image to data FIFO B from the frame header data and counting data currently written to data FIFO B to obtain a first count value cnt1, if it is detected that current data FIFO a has become an empty queue again and data of the current frame image have not been written to the data queue all at the time, writing current unprocessed data in the current frame image to data FIFO a, then, when performing a data readout operation for the current frame image, reading cnt1 data from data FIFO B and writing the data into the preset memory, and then, reading and writing data of the current frame image stored in data FIFO a into the preset memory.
For the specific content of the above step S21, reference may be made to the corresponding content disclosed in the foregoing embodiment, and no detailed description is given here.
In the embodiment of the invention, when the frame head data of the current frame image is received, the first data queue is detected to be not an empty queue, and the second data queue is detected to be an empty queue, the data in the current frame image is sequentially written into the second data queue from the frame head data, and the data currently written into the second data queue is counted to obtain the first count value, in the process of sequentially writing the data in the current frame image into the second data queue, the current first data queue is detected to be changed into the empty queue again, and the data of the current frame image is not completely written into the data queue, and then the current unprocessed data in the current frame image is written into the first data queue, so that the situation that the frame is lost due to the fact that the data of the previous frame image is not processed is avoided when a new frame image arrives, namely, the frame loss rate is reduced by using the two data queues to process the image data, and the transmission of invalid data is reduced.
Referring to fig. 5, an embodiment of the present invention discloses a specific image output method, and compared with the previous embodiment, the present embodiment further describes and optimizes the technical solution.
Step S31: and when receiving the frame header data of the current frame image, detecting the current state of the first data queue to obtain a corresponding first queue state.
Step S32: and if the first queue state indicates that the current first data queue is an empty queue, starting an operation of processing the current frame image by using the first data queue so as to write the data in the current frame image into the first data queue, and reading out the written data of the current frame image from the first data queue and writing the written data into a preset memory.
Step S33: and monitoring whether the first data queue is fully written in real time in the process of processing the current frame image by utilizing the first data queue.
Step S34: and if the first data queue is monitored to be fully written, starting an operation of processing unprocessed data in the current frame image by using a second data queue so as to write the unprocessed data in the current frame image into the second data queue, and reading the written data of the current frame image from the second data queue and writing the written data into the preset memory.
Step S35: and in the process of processing the unprocessed data in the current frame image by utilizing the second data queue, monitoring whether the second data queue is fully written or not in real time.
It can be understood that when the frame header data of the current frame image is received and the first data queue is detected to be empty, the data in the current frame image is written into the first data queue, then whether the first data queue is full or not is monitored in real time in the process of writing the data in the current frame image into the first data queue, if the first data queue is monitored to be full and the data of the current frame image is not fully written into the first data queue, the data which is not written into the first data queue in the current frame image is written into the second data queue, and then whether the second data queue is full or not is monitored in real time in the process of writing the unprocessed data in the current frame image into the second data queue.
Step S36: and if the second data queue is fully written and the current first data queue does not become an empty queue again, counting the data which is not written into the data queue normally currently in the current frame image and the data which is written into the second data queue to obtain a second count value until the fact that the current first data queue becomes an empty queue again is detected.
In this embodiment, during writing the unprocessed data in the current frame image into the second data queue, whether the second data queue is full is monitored in real time, if the second data queue is full and the current first data queue is not changed into an empty queue again, counting the data which is not written into the data queue normally currently in the current frame image and the data written into the second data queue to obtain a second count value until detecting that the current first data queue is changed into the empty queue again. It can be understood that the unprocessed data in the current frame image is written into the second data queue, and the second data queue is fully written, and the first data queue is not yet empty, that is, the first data queue is not currently changed into an empty queue again, which indicates that neither the first data queue nor the second data queue can be written with data, so that the data in the current frame image, which is not currently written into the data queue normally, and the data written into the second data queue are counted to obtain a second count value until the fact that the first data queue is detected to be empty again is detected, and then corresponding processing is performed based on the second count value.
In this embodiment, during processing of unprocessed data in the current frame image with a second data queue, whether the second data queue is full or not is monitored in real time, if the second data queue is not full, the operation of writing unprocessed data in the current frame image into the second data queue is continuously performed, the written data of the current frame image is read out from the second data queue and written into the preset memory, and during writing unprocessed data in the current frame image into the second data queue, the data currently written into the second data queue is counted to obtain a third count value, and then the operation of reading out data corresponding to the third count value from the second data queue and writing the written data into the preset memory is detected, and then the data of the current frame image is read out from the second data queue and written into the preset memory.
Step S37: and judging whether the second count value reaches a first preset threshold value or not.
It can be understood that when the unprocessed data in the current frame image is written into the second data queue and the second data queue is full, and the first data queue is not yet read empty, counting the data which is not normally written into the data queue currently in the current frame image and the data which is written into the second data queue to obtain a second count value until detecting that the first data queue is changed into an empty queue again currently, and then judging whether the second count value reaches a first preset threshold value.
Step S38: if the second count value does not reach the first preset threshold value, after all the data in the first data queue and the second data queue are read out and written into the preset memory in sequence, determining the target number of preset characters based on the second count value and the depth of the second data queue, and writing the preset characters of the target number into the preset memory.
In this embodiment, when unprocessed data in the current frame image is written into the second data queue and the second data queue is full, and a first data queue is not yet read empty, counting data in the current frame image, which is not normally written into the data queue currently, and data written into the second data queue to obtain a second count value until the current first data queue is detected to be changed into an empty queue again, then judging whether the second count value reaches a first preset threshold, if the second count value does not reach the first preset threshold, determining a target number of preset characters based on the depths of the second count value and the second data queue after all data in the current first data queue and the second data queue are read out and written into the preset memory in sequence, and writing the target number of preset characters into the preset memory. It will be appreciated that although it is not possible to write data into both the second data queue when the second data queue is full and the first data queue is not yet read, since the first data queue is always in a read state, reading data from the second data queue continues after the first data queue is read until the second data queue is also read empty, determining a target number of preset characters based on the second count value and the depth of the second data queue, and writing the target number of the preset characters into the preset memory, that is, replacing the data in the current frame image, which is not currently normally written into the data queue, with the same number of preset characters. For example, when the data FIFO B is full and the data FIFO a is not read empty, counting the data which is not normally written into the data queue currently in the current frame image and the data which is written into the data FIFO B to obtain a second count value cnt2, when the second count value cnt2 does not reach the first preset threshold, continuing to read the data from the data FIFO B after the data FIFO a is read empty, waiting for the data FIFO B to be read empty, performing difference processing on the cnt2 and the depth of the data FIFO B to obtain a target number of preset characters 0, then writing the target number of preset characters 0 into the preset memory through an AXI bus, then continuing to read the data of the next frame image written into the data FIFO a, and when the data FIFO a is changed into an empty queue again, re-writing the data into the data FIFO a, wherein the number is equivalent to the number of lost (cnt 2-FIFO B depth), replacing the data with the same number of 0, displaying only a bit on the far-end user, and displaying the whole snow effect is not affected, namely, the snow effect can be controlled according to the actual threshold.
In this embodiment, when the unprocessed data in the current frame image is written into the second data queue and the second data queue is full, and the first data queue is not yet read empty, counting the data which is not normally written into the data queue currently in the current frame image and the data which is written into the second data queue to obtain a second count value until the fact that the first data queue is detected to be changed into an empty queue again is detected, then judging whether the second count value reaches a first preset threshold, if the second count value reaches the first preset threshold, discarding the data which is not written into the data queue currently in the current frame image, setting a frame status flag of the current frame image to be a first preset status value representing that the data of the current frame image is incomplete, and stopping updating the value in the status queue.
In this embodiment, in the process of processing the current frame image, the number of times that the second data queue is fully written is recorded; judging whether the times reach a second preset threshold value or not; if the times reach the second preset threshold value, discarding the current frame image, setting a frame state flag of the current frame image as a first preset state value representing the incompleteness of the current frame image, and stopping updating the value in a state queue; and if the times do not reach the second preset threshold value, reserving the current frame image, setting a frame state mark of the current frame image as a second preset state value representing the integrity of the current frame image, and correspondingly updating the value in the state queue. It may be understood that, in the process of processing the current frame image, if the recorded number of times that the second data queue is fully written reaches the second preset threshold value, which indicates that the current frame image is lost many times and is frequently lost, the current frame image is lost, and the frame status flag of the current frame image is set to a first preset status value indicating that the current frame image is incomplete, and the value in the status queue is stopped being updated, for example, the frame status flag is set to 1 to indicate that the current frame data is incomplete, the value of the status FIFO is not updated, and if the recorded number of times that the second data queue is fully written does not reach the second preset threshold value, which indicates that the current frame image is only lost several times and the overall effect is not affected, the frame status flag of the current frame image is set to 2 to indicate that the current frame data is complete, and the value of the status FIFO is updated is preserved.
For the specific content of the above steps S31 to S34, reference may be made to the corresponding content disclosed in the foregoing embodiment, and a detailed description is omitted herein.
It can be seen that, in the embodiment of the present invention, when frame header data of a current frame image is received and it is detected that a first data queue is an empty queue, data in the current frame image is written into the first data queue, and when it is monitored that the first data queue is full, unprocessed data in the current frame image is written into the second data queue, and whether the second data queue is full is monitored in real time, then the second data queue is full, and the first data queue does not become an empty queue again, then data which cannot be written into the data queue normally currently in the current frame image and data which are written into the second data queue are counted to obtain a second count value, and whether to replace the lost data by sending preset characters with the same number as the lost data to a preset memory is determined based on the second count value, so that influence of a far-end user viewing effect caused by image data loss can be reduced, that is, by using two data queues to process image data, the frame loss rate can be reduced, and transmission of invalid data can be reduced.
Correspondingly, the embodiment of the invention also discloses an improved structure of the image output sub-module, which is shown in fig. 6, and compared with the structure of the prior image output sub-module in fig. 2, the structure of the improved image output control sub-module is added with a data FIFO B and a counting unit, and the corresponding control logic is optimized. The data FIFO A and the data FIFO B are used for receiving image data, and the format of the image data can be YUV format or JPEG format; the frame status flag is used for indicating the writing status of each frame of image data, and '1' indicates that the current frame of data is incomplete and needs to be lost, and the value of the status FIFO is not updated; "2" indicates that the current frame data is complete and the value of the status FIFO needs to be updated; the status FIFO is used to record information of each frame of image data, and the information of each frame of image data may include, but is not limited to, an address where a frame header is located, an address where a frame tail is located, a size of a current frame, and the like, and is provided for a driver; the counting unit is used for counting, and recording the number of data written into the data FIFO B when the data FIFO A is full, the number of data lost when the data FIF 0B is full, the number of times of full data FIFO B and the like; the control unit is used for controlling the reading and writing of each FIFO, the value of the counting unit and the whole data stream; the AXI Master write time sequence control unit reads data in the data FIFO, converts the data into AXI time sequence, writes the AXI time sequence into the DDR, judges whether the current frame is a complete frame or an incomplete frame according to a frame state mark when transmitting frame tail data of each frame, and the detailed control logic refers to the specific description of the embodiment.
Correspondingly, the embodiment of the invention also discloses an image output device, referring to fig. 7, the device comprises:
the first detection module 11 is configured to detect, when frame header data of a current frame image is received, a current state of a first data queue to obtain a corresponding first queue state;
a first read-write module 12, configured to, when the first queue status indicates that the first data queue is empty, start an operation of processing the current frame image using the first data queue, so as to write data in the current frame image into the first data queue, and read and write the written data of the current frame image from the first data queue into a preset memory;
a first monitoring module 13, configured to monitor, in real time, whether the first data queue is full or not in a process of processing the current frame image by using the first data queue;
and the second read-write module 14 is configured to, when it is detected that the first data queue is full, start an operation of processing the unprocessed data in the current frame image by using a second data queue, so as to write the unprocessed data in the current frame image into the second data queue, and read the written data of the current frame image from the second data queue and write the written data into the preset memory.
From the above, in the embodiment of the present invention, when the frame header data of the current frame image is received and the first data queue is detected to be an empty queue, the data in the current frame image is written into the first data queue, and when the first data queue is detected to be full, the unprocessed data in the current frame image is written into the second data queue, so that the situation of frame loss caused by the full writing of the first data queue, that is, the frame loss rate can be reduced and the transmission of invalid data can be reduced by using two data queues to process the image data.
In some specific embodiments, the image output apparatus may specifically further include:
the second detection module is used for detecting the current state of the second data queue to obtain a corresponding second queue state when the first queue state indicates that the current first data queue is not an empty queue;
the first processing module is used for starting the operation of processing the current frame image by using the second data queue when the second queue state indicates that the current second data queue is empty, so as to sequentially write the data in the current frame image into the second data queue from the frame head data, count the data currently written into the second data queue to obtain a first count value, and detect whether the current first data queue is changed into the empty queue again;
The first judging module is used for judging whether the data of the current frame image are completely written into the data queue or not when detecting that the current first data queue is changed into an empty queue again;
and a third read-write module, configured to start an operation of processing unprocessed data in the current frame image by using the first data queue when the data of the current frame image is not all written into the data queue, so as to write the current unprocessed data in the current frame image into the first data queue, and perform a data read-out operation for the current frame image, so as to read out and write data corresponding to the first count value from the second data queue into the preset memory, and then read out and write the data of the current frame image stored in the first data queue into the preset memory.
In some specific embodiments, the image output apparatus may specifically further include:
and the first image discarding module is used for continuing to process the residual data which is not written into the data queue in the previous frame image and discarding the current frame image when the state of the second queue indicates that the current second data queue is not an empty queue.
In some specific embodiments, the image output apparatus may specifically further include:
and the second processing module is used for continuing the step of writing the data in the current frame image into the first data queue and reading the written data of the current frame image from the first data queue and writing the written data into a preset memory when the first data queue is not fully written in the process of processing the current frame image, and correspondingly updating the value in the state queue after the current frame image processing is finished.
In some specific embodiments, the image output apparatus may specifically further include:
the second monitoring module is used for monitoring whether the second data queue is fully written in real time in the process of processing unprocessed data in the current frame image by utilizing the second data queue;
and the third processing module is used for counting the data which is not written into the data queue normally currently in the current frame image and the data which is written into the second data queue when the second data queue is fully written and the current first data queue is not changed into the empty queue again until the current first data queue is detected to be changed into the empty queue again.
In some specific embodiments, the image output apparatus may specifically further include:
the second judging module is used for judging whether the second count value reaches a first preset threshold value or not;
the second image discarding module is used for discarding the data which cannot be written into the data queue currently in the current frame image when the second count value reaches the first preset threshold value, setting a frame state flag of the current frame image as a first preset state value representing incomplete data of the current frame image, and stopping updating the value in the state queue;
and the fourth read-write module is used for determining the target number of preset characters based on the depth of the second count value and the second data queue after sequentially reading and writing all the data in the first data queue and the second data queue into the preset memory when the second count value does not reach the first preset threshold value, and writing the target number of the preset characters into the preset memory.
In some specific embodiments, the image output apparatus may specifically further include:
the recording module is used for recording the times of the second data queue being fully written in the process of processing the current frame image;
The third judging module is used for judging whether the times reach a second preset threshold value or not;
the third image discarding module is configured to discard the current frame image and set a frame status flag of the current frame image to a first preset status value indicating that the current frame image is incomplete, and stop updating the value in the status queue when the number of times reaches the second preset threshold;
and the image retention module is used for retaining the current frame image when the times do not reach the second preset threshold value, setting a frame state mark of the current frame image as a second preset state value representing the integrity of the current frame image, and correspondingly updating the value in the state queue.
Further, the embodiment of the invention also provides electronic equipment. Fig. 8 is a block diagram of an electronic device 20, according to an exemplary embodiment, and the contents of the diagram should not be construed as limiting the scope of use of the present invention in any way.
Fig. 8 is a schematic structural diagram of an electronic device 20 according to an embodiment of the present invention. The electronic device 20 may specifically include: at least one processor 21, at least one memory 22, a power supply 23, a communication interface 24, an input output interface 25, and a communication bus 26. Wherein the memory 22 is used for storing a computer program, which is loaded and executed by the processor 21 to implement the relevant steps in the image output method disclosed in any of the foregoing embodiments. In addition, the electronic device 20 in the present embodiment may be specifically an electronic computer.
In this embodiment, the power supply 23 is configured to provide an operating voltage for each hardware device on the electronic device 20; the communication interface 24 can create a data transmission channel between the electronic device 20 and an external device, and the communication protocol to be followed is any communication protocol applicable to the technical solution of the present invention, which is not specifically limited herein; the input/output interface 25 is used for acquiring external input data or outputting external output data, and the specific interface type thereof may be selected according to the specific application requirement, which is not limited herein.
The memory 22 may be a carrier for storing resources, such as a read-only memory, a random access memory, a magnetic disk, or an optical disk, and the resources stored thereon may include an operating system 221, a computer program 222, and the like, and the storage may be temporary storage or permanent storage.
The operating system 221 is used for managing and controlling various hardware devices on the electronic device 20 and computer programs 222, which may be Windows Server, netware, unix, linux, etc. The computer program 222 may further include a computer program that can be used to perform other specific tasks in addition to the computer program that can be used to perform the image output method performed by the electronic device 20 disclosed in any of the foregoing embodiments.
Further, the embodiment of the invention also discloses a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and when the computer program is loaded and executed by a processor, the steps of the image output method disclosed in any embodiment are realized.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, so that the same or similar parts between the embodiments are referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing has described in detail the method, apparatus, device and storage medium for outputting images, and specific examples have been applied to illustrate the principles and embodiments of the present invention, and the above examples are only for aiding in understanding the method and core idea of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (10)
1. An image output method, comprising:
when frame head data of a current frame image are received, detecting the current state of a first data queue to obtain a corresponding first queue state;
if the first queue state indicates that the current first data queue is an empty queue, starting an operation of processing the current frame image by using the first data queue so as to write data in the current frame image into the first data queue, and reading out the written data of the current frame image from the first data queue and writing the written data into a preset memory;
Monitoring whether the first data queue is fully written in real time in the process of processing the current frame image by utilizing the first data queue;
and if the first data queue is monitored to be fully written, starting an operation of processing unprocessed data in the current frame image by using a second data queue so as to write the unprocessed data in the current frame image into the second data queue, and reading the written data of the current frame image from the second data queue and writing the written data into the preset memory.
2. The method according to claim 1, wherein after detecting the current state of the first data queue to obtain the corresponding first queue state, further comprising:
if the first queue state indicates that the current first data queue is not an empty queue, detecting the current state of the second data queue to obtain a corresponding second queue state;
if the second queue state indicates that the current second data queue is an empty queue, starting an operation of processing the current frame image by using the second data queue, so as to sequentially write data in the current frame image into the second data queue from the frame header data, count the data currently written into the second data queue to obtain a first count value, and detecting whether the current first data queue has become an empty queue again;
If the fact that the current first data queue is changed into an empty queue again is detected, judging whether the data of the current frame image are completely written into the data queue or not;
and if the data of the current frame image are not completely written into the data queue, starting an operation of processing unprocessed data in the current frame image by using the first data queue so as to write the current unprocessed data in the current frame image into the first data queue, and executing a data reading operation for the current frame image so as to read and write the data corresponding to the first count value from the second data queue into the preset memory, and then reading and writing the data of the current frame image stored in the first data queue into the preset memory.
3. The image output method according to claim 2, wherein after the detecting the current state of the second data queue obtains the corresponding second queue state, further comprising:
and if the second queue state indicates that the current second data queue is not an empty queue, continuing to process the residual data which is not written into the data queue in the previous frame image, and discarding the current frame image.
4. The image output method according to claim 1, characterized by further comprising:
and if the first data queue is not fully written, continuing to write the data in the current frame image into the first data queue, reading the written data of the current frame image from the first data queue and writing the written data into a preset memory, and correspondingly updating the value in a state queue after the processing of the current frame image is finished.
5. The image output method according to any one of claims 1 to 4, wherein after the operation of starting processing of the unprocessed data in the current frame image using the second data queue, further comprising:
in the process of processing unprocessed data in the current frame image by utilizing a second data queue, monitoring whether the second data queue is fully written or not in real time;
and if the second data queue is fully written and the current first data queue does not become an empty queue again, counting the data which is not written into the data queue normally currently in the current frame image and the data which is written into the second data queue to obtain a second count value until the fact that the current first data queue becomes an empty queue again is detected.
6. The image output method according to claim 5, further comprising:
judging whether the second count value reaches a first preset threshold value or not;
if the second count value reaches the first preset threshold value, discarding the data which cannot be written into the data queue currently in the current frame image, setting a frame state flag of the current frame image as a first preset state value representing incomplete data of the current frame image, and stopping updating the value in the state queue;
if the second count value does not reach the first preset threshold value, after all the data in the first data queue and the second data queue are read out and written into the preset memory in sequence, determining the target number of preset characters based on the second count value and the depth of the second data queue, and writing the preset characters of the target number into the preset memory.
7. The image output method according to claim 5, further comprising:
recording the times of the second data queue being written up in the process of processing the current frame image;
judging whether the times reach a second preset threshold value or not;
If the times reach the second preset threshold value, discarding the current frame image, setting a frame state flag of the current frame image as a first preset state value representing the incompleteness of the current frame image, and stopping updating the value in a state queue;
and if the times do not reach the second preset threshold value, reserving the current frame image, setting a frame state mark of the current frame image as a second preset state value representing the integrity of the current frame image, and correspondingly updating the value in the state queue.
8. An image output apparatus, comprising:
the first detection module is used for detecting the current state of the first data queue to obtain a corresponding first queue state when receiving frame header data of the current frame image;
the first reading and writing module is used for starting the operation of processing the current frame image by using the first data queue when the first queue state indicates that the current first data queue is empty, so as to write the data in the current frame image into the first data queue, and reading the written data of the current frame image from the first data queue and writing the written data into a preset memory;
The first monitoring module is used for monitoring whether the first data queue is fully written or not in real time in the process of processing the current frame image by utilizing the first data queue;
and the second reading and writing module is used for starting the operation of processing the unprocessed data in the current frame image by using a second data queue when the first data queue is monitored to be full, writing the unprocessed data in the current frame image into the second data queue, and reading the written data of the current frame image from the second data queue and writing the written data into the preset memory.
9. An electronic device, comprising:
a memory for storing a computer program;
a processor for executing the computer program to implement the steps of the image output method as claimed in any one of claims 1 to 7.
10. A computer-readable storage medium storing a computer program; wherein the computer program when executed by a processor implements the steps of the image output method according to any one of claims 1 to 7.
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| CN117319716B (en) * | 2023-11-28 | 2024-02-27 | 苏州元脑智能科技有限公司 | Resource scheduling method of baseboard management control chip and baseboard management control chip |
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