CN115220663A - Single-chip microcomputer picture buffering processing method and device - Google Patents
Single-chip microcomputer picture buffering processing method and device Download PDFInfo
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- CN115220663A CN115220663A CN202210916397.3A CN202210916397A CN115220663A CN 115220663 A CN115220663 A CN 115220663A CN 202210916397 A CN202210916397 A CN 202210916397A CN 115220663 A CN115220663 A CN 115220663A
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- 239000000872 buffer Substances 0.000 claims abstract description 97
- 238000012163 sequencing technique Methods 0.000 claims abstract description 9
- 238000004364 calculation method Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 abstract description 17
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
- G06F3/0601—Interfaces specially adapted for storage systems
- G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
- G06F3/0655—Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
- G06F3/0656—Data buffering arrangements
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/957—Browsing optimisation, e.g. caching or content distillation
- G06F16/9574—Browsing optimisation, e.g. caching or content distillation of access to content, e.g. by caching
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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
- G06F9/54—Interprogram communication
- G06F9/544—Buffers; Shared memory; Pipes
Abstract
The invention discloses a single-chip microcomputer picture buffering processing method, which comprises the following steps: s1, calculating pictures in a buffer area to obtain sequencing information; s2, determining a picture to be deleted from the buffer area according to the sorting information, and deleting the picture to be deleted; s3, selecting pictures from the hard disk and storing the pictures in a buffer area; and a single chip picture buffering processing device with the method. The pictures in the buffer area are calculated to obtain the sequencing information, the pictures in the buffer area are deleted according to the sequencing information, and new pictures are selected from the hard disk and stored in the buffer area, so that the picture display speed is increased, and the picture display is prevented from being blocked. Meanwhile, by adopting the picture buffering processing method and device, the reading times of the hard disk are effectively reduced, and the service life of the hard disk is prolonged.
Description
Technical Field
The invention relates to a picture buffering method and a picture buffering device, in particular to a single-chip microcomputer picture buffering method and a single-chip microcomputer picture buffering device, which are applied to the field of picture processing of electronic equipment.
Background
When the single chip microcomputer displays pictures, the pictures are cached through a memory buffer area, the buffer area is used for solving the problem of speed mismatching, the problem of speed mismatching between a high-speed single chip microcomputer CPU and a memory, between the memory and a hard disk, between the single chip microcomputer CPU and an I/O port and the like is solved, the buffer area is introduced, for example, information needs to be read from the hard disk, the read data is firstly placed in the buffer area, the single chip microcomputer CPU directly reads the data from the buffer area, and the read data is read from the hard disk after the data in the buffer area is completely read. Therefore, the read-write times of the magnetic disk can be reduced, the operation of the single chip microcomputer CPU on the buffer area is greatly faster than that on the hard disk, the picture is extracted in the buffer area in advance to be cached, and the display speed is much higher.
However, because the memory of the single chip microcomputer is small, the space size of a buffer area in the memory based on picture display is also small, a plurality of pictures can occupy more memory space for display, if the cache pictures are not cleared in time, the pictures can be loaded in a new way, and because the memory space of the single chip microcomputer is limited, more cache space cannot be allocated for the display pictures.
Therefore, pictures cached by the singlechip are limited, when the caching space is insufficient, some cached pictures must be deleted so as to make the caching space store new pictures, but in the practical use of a user, some pictures can be displayed for many times at a certain time interval, if the cached pictures are directly deleted, the pictures can be repeatedly extracted from the hard disk at a certain time interval, the reading times of the hard disk are increased, and the singlechip picture caching method is also lacked at present.
Disclosure of Invention
Aiming at the problems that in the prior art, the memory of a single chip microcomputer is small, the space of a buffer area in the memory based on picture display is small, a plurality of pictures occupy more memory space, and the picture is blocked by newly loaded pictures if the buffer pictures are not cleared in time, the invention provides a single chip microcomputer picture buffering processing method and a single chip microcomputer picture buffering processing device.
The technical scheme adopted by the invention for solving the technical problems is as follows: a picture buffering processing method for a single chip microcomputer comprises the following steps:
s1, calculating pictures in a buffer area to obtain sequencing information;
s2, determining a picture to be deleted from the buffer area according to the sorting information, and deleting the picture to be deleted;
and S3, selecting pictures from the hard disk and storing the pictures in a buffer area.
Further, the step of calculating the pictures in the buffer area and acquiring the sorting information comprises the following steps:
s101, acquiring browsing information of each picture;
s102, calculating according to the browsing information of each picture to obtain a replacement coefficient;
s103, sorting according to the numerical value of the replacement coefficient, and acquiring sorting information.
Further, the browsing information includes picture loading time, display times and display time.
Further, the steps of selecting pictures from the hard disk and storing the pictures in the buffer area comprise the following steps:
s301, calculating a release space of the cache according to a preset threshold and a used cache space;
s302, selecting pictures from the hard disk according to the release space and storing the pictures in a buffer area.
Further, the steps of selecting pictures from the hard disk and storing the pictures in the buffer area comprise the following steps:
s301, calculating the number of the pictures which can be buffered according to the preset number of the buffered pictures and the number of the used buffered pictures;
s302, selecting the corresponding number of pictures from the hard disk according to the number of pictures which can be buffered, and storing the number of pictures in a buffer area.
The invention also adopts the technical scheme for solving the technical problems that: a picture buffering processing device of a singlechip comprises a picture sorting module, a picture deleting module and a picture storing module;
the image sorting module is used for calculating the images in the buffer area and acquiring sorting information;
the picture deleting module is used for determining pictures to be deleted from the buffer area according to the sorting information and deleting the pictures to be deleted;
the picture saving module is used for selecting pictures from the hard disk and saving the pictures in the buffer area.
Furthermore, the image sorting module comprises an image information acquisition unit, a calculation unit and a sorting unit;
the picture information acquisition unit is used for acquiring browsing information of each picture;
the calculating unit is used for calculating according to the browsing information of each picture to obtain a replacement coefficient;
the sorting unit is used for sorting according to the magnitude of the replacement coefficient value to obtain sorting information.
Further, the picture information acquiring unit is used for acquiring picture loading time, display times and display time.
Further, the picture saving module comprises a buffer calculation unit and a picture saving unit;
the buffer calculation unit is used for calculating the release space of the buffer according to a preset threshold and the used buffer space;
the picture storage unit is used for selecting pictures from the hard disk according to the release space and storing the pictures in the buffer area.
Further, the picture saving module comprises a buffer calculation unit and a picture saving unit;
the buffer calculating unit is used for calculating the number of the pictures which can be buffered according to the preset number of the buffer pictures and the number of the used buffer pictures;
the picture storage unit is used for selecting the corresponding number of pictures from the hard disk and storing the number of the pictures into the buffer area according to the number of the pictures which can be buffered.
The invention has the beneficial effects that: a method and a device for buffering and processing pictures of a singlechip are provided, which are characterized in that the pictures in a buffer area are calculated to obtain sequencing information, the pictures in the buffer area are deleted according to the size of the sequencing information, and a new picture is selected from a hard disk and stored in the buffer area, so that the picture display speed is improved, and the picture display is prevented from being blocked.
Meanwhile, by adopting the picture buffering processing method and device, the reading times of the hard disk are effectively reduced, and the service life of the hard disk is prolonged.
Drawings
FIG. 1 is a flow chart of steps of a method for buffering pictures by a single chip microcomputer;
fig. 2 is a block diagram of a single-chip picture buffering processing device provided by the invention.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a method and a device for buffering a picture by using a single chip microcomputer, aiming at the situation that the current small electronic display equipment has limited memory of the single chip microcomputer and display pictures are jammed, such as electronic display equipment such as a knob screen, an intelligent bracelet and an instrument panel display.
Referring to fig. 1, the method for buffering pictures by a single chip according to the present invention includes the following steps:
s1, calculating the pictures in the buffer area to obtain sequencing information.
In this embodiment, the steps of calculating the pictures in the buffer area and acquiring the ranking information are specifically performed, browsing information of each picture in the buffer area is acquired through a work log of the single chip microcomputer, a replacement coefficient is obtained through calculation according to the browsing information of each picture, ranking is performed according to the numerical value of the replacement coefficient, and ranking information is acquired. Before the step S1, when no picture to be displayed exists in the buffer area, the singlechip CPU buffers n pictures in the hard disk, and a random selection mode is adopted, for example, when equipment is restarted or after the equipment is maintained by a system.
In specific implementation, the browsing information of each picture is calculated to obtain the replacement coefficient of each picture, the replacement coefficient is calculated according to the browsing information, and the replacement coefficient M of a single picture n The picture loading time is X n Display number of times of C n Display time T n Calculating, in order to maximally ensure that the calculated picture is a picture which can be displayed for multiple times within a certain time interval, setting a previous time zone f away from the current time zone, wherein the current time zone is 2 points to 3 points, the previous time zone f is 1 point to 2 points, and the number of times that the picture is displayed in the current time zone is Cf n I.e. the frequency of pictures displayed in the time zone F, i.e. the frequency of display F n ＝Cf n /C n The display frequency of the picture is calculated to obtain the probability of the picture being displayed, meanwhile, the occupied memory of each picture is too small and different, the loading time brought by each picture is different, the larger the occupied inner side is, the longer the loading time is, if the picture is placed in a hard disk, reading is influenced, and the situation of blocking is easily caused, so that the loading situation of the picture, namely C, is calculated n *X n Thus, a replacement coefficient M of the picture can be derived n ＝Cf n /C n *T n +C n *X n 。
In this embodiment, another calculation method may be adopted, and the replacement coefficient M of a single picture n The picture loading time is x n The time of the picture staying in the buffer area is y n Perform calculations, i.e.
When the number of pictures to be displayed on the single chip microcomputer is not in the buffer area, the single chip microcomputer CPU pulls N related pictures from the hard disk, when the number of pictures is larger than a budget threshold Q of the buffer area or N is larger than a picture number threshold N of the buffer area, the replacement coefficients of all the pictures are sorted from large to small, the picture with the minimum replacement coefficient is deleted, and the single chip microcomputer CPU pulls a new picture from the hard disk to cache and load.
Furthermore, the time Y of the picture displayed on the current device interface can be considered n And displaying the number of times O n I.e. by
Wherein Y is introduced n /y n The method is to avoid deleting pictures displayed on the equipment interface for a long time; introduction of
The method and the device have the advantages that the problem that if one picture is displayed for a short time and is switched for multiple times, if the picture in the hard disk is read again each time, the picture is displayed incompletely during switching, a complete interface cannot be displayed, and the user experience is reduced is solved.
And S2, determining the picture to be deleted from the buffer area according to the sorting information, and deleting the picture to be deleted.
The method includes obtaining ranking information according to replacement coefficients of each picture obtained in different calculation modes, wherein the ranking information can be obtained by ranking the replacement coefficients from large to small or from small to large, and can be obtained by directly comparing the replacement coefficients of the smallest one or more pictures, deleting the one or more pictures with the smallest replacement coefficients within a specific time period according to use requirements, for example, calculating the pictures once in an hour, and deleting the pictures after obtaining the ranking. Or ten minutes can be adopted to calculate the pictures once, and one picture can be deleted after the obtained sequence is obtained.
And S3, selecting pictures from the hard disk and storing the pictures in a buffer area.
In specific implementation, according to different cache region setting modes, different modes of selecting pictures from a hard disk and storing the pictures in the cache region can be adopted, and two cache region setting modes are provided;
(1) The cache region adopts a preset threshold value setting mode, the single chip microcomputer calculates the release space of the cache according to the preset threshold value and the used cache space through calculation, and selects pictures from the hard disk to be stored in the cache region according to the release space, namely, the new pictures are loaded according to the memory space capable of being accommodated, so that the direct loading from the hard disk is reduced, and the reading times of the hard disk is reduced. The method is suitable for the time when the memory size of each picture has a large difference or the time when picture replacement coefficient calculation is carried out under a small frequency. If the preset threshold is 300k, the used buffer space is 200k, and the memory space that can be accommodated is 100k. If the number of the single picture exceeds 50k, only one picture can be loaded, and if the average number of the single picture is 30k, 2-3 pictures can be loaded.
(2) The method comprises the steps that a mode of presetting a threshold picture quantity threshold value is adopted in a cache region, the number of pictures which can be buffered is calculated according to the preset number of buffered pictures and the number of used buffered pictures, and the corresponding number of pictures is selected from a hard disk and stored in the cache region according to the number of the pictures which can be buffered. The method is suitable for the case that the memory size of each picture is consistent, or the case that the picture replacement coefficient is calculated under a higher frequency, and the case that a plurality of pictures are replaced simultaneously. If the threshold number of pictures is 10 pictures, the number of used buffer pictures is 8, or the number of buffer pictures may be 2.
In this embodiment, before the picture is placed and found in the hard disk of the single chip microcomputer, pictures of various formats can be decompressed on a computer, for example, a picture of a JPG format with a memory size of 20k is decompressed into an RGB format, the decompressed picture is a picture of an RGB format of 200k, the picture of the RGB format is compressed into a picture of an RGB format of 50k once, and finally the picture is placed into the hard disk of the single chip microcomputer, the middle of the single chip microcomputer is small in storage, and if the decompressed picture is directly stored into the single chip microcomputer, the occupied storage space is too large, so that the decompressed picture is stored into the single chip microcomputer for compression, the storage pressure of the single chip microcomputer is reduced, and meanwhile, the integrity of the picture can also be ensured.
Referring to fig. 2, the picture buffering processing apparatus of the single chip microcomputer according to the present invention includes a picture sorting module 10, a picture deleting module 20, and a picture saving module 30.
The picture sorting module 10 is configured to calculate pictures in the buffer to obtain sorting information.
In this embodiment, the image in the buffer area is calculated to obtain the sorting information specifically, the image information obtaining unit obtains the browsing information of each image in the buffer area through a working log of the single chip, the calculating unit obtains the replacement coefficient by calculating according to the browsing information of each image, and the sorting unit sorts according to the value of the replacement coefficient to obtain the sorting information. When the picture to be displayed does not exist in the buffer area, the singlechip CPU buffers n pictures in the hard disk, and a random selection mode is adopted, for example, when the equipment is restarted or after the equipment is subjected to system maintenance.
In specific implementation, the calculation unit calculates the replacement coefficient of each picture according to the browsing information of each picture, calculates the replacement coefficient according to the browsing information, and calculates the replacement coefficient M of each picture n The picture loading time is X n Number of display times is C n Display time T n Calculating, in order to maximally ensure that the calculated picture is a picture which can be displayed for multiple times within a certain time interval, a previous time zone f from the current time zone is set, so that the current time zone is 2 o 'clock-3 o' clock, the previous time zone f is 1 o 'clock-2 o' clock, and the number of times that the picture is displayed in the current time zone is Cf n I.e. picture frequency in time zone fSub, i.e. display frequency F n ＝Cf n /C n By calculating the display frequency of the picture, the probability of the picture being displayed can be known, meanwhile, the occupied memory of each picture is too small and different, the loading time brought by each picture is different, the larger the occupied inner side is, the longer the loading time is, if the picture is placed in a hard disk, the reading is influenced, the jamming condition is easily caused, and therefore the loading condition of the picture, namely C, is calculated n *X n Therefore, the replacement coefficient Mn = Cf of the picture can be derived n /C n *T n +C n *X n 。
In this embodiment, another calculation method may also be adopted, in which the replacement coefficient M of a single picture is n The picture loading time is xn, and the time for the picture to stay in the buffer area is y n Perform calculations, i.e.
When the number of pictures to be displayed on the single chip microcomputer is not in the buffer area, the single chip microcomputer CPU pulls N related pictures from the hard disk, when the number of pictures is larger than a budget threshold Q of the buffer area or N is larger than a picture number threshold N of the buffer area, the replacement coefficients of all the pictures are sorted from large to small, the picture with the minimum replacement coefficient is deleted, and the single chip microcomputer CPU pulls a new picture from the hard disk to cache and load.
Furthermore, the time Y of the picture displayed on the current device interface can be considered n And displaying the number of times O n I.e. by
Wherein Y is introduced n /y n The method is to avoid deleting pictures displayed on the equipment interface for a long time; introduction of
Considering that a picture is displayed for a short time, but is switched for many times, if the picture is read again every timeThe pictures can be displayed incompletely during switching, a complete interface cannot be displayed, and the problem of reduced user experience is solved.
The picture deleting module 20 is configured to determine a picture to be deleted from the buffer according to the sorting information, and delete the picture to be deleted.
The image deleting module 20 deletes one or more images with the smallest replacement coefficients within a specific time period according to the use requirement, for example, the images are calculated once in an hour, and the images are deleted after the obtained ordering is performed. Or the calculation can be carried out by adopting ten minutes to carry out the calculation once, and one picture can be deleted after the sequence is obtained.
The picture saving module 30 is used for selecting pictures from the hard disk and saving the pictures in the buffer area.
In a specific implementation, the picture saving module 30 includes a buffer calculating unit and a picture saving unit, and different ways of selecting pictures from the hard disk to save to the buffer area can be adopted according to different buffer area setting ways, where two buffer area setting ways are provided;
(1) The cache region adopts a preset threshold value setting mode, the single chip microcomputer calculates, the cache calculating unit calculates the release space of the cache according to the preset threshold value and the used cache space, the picture storing unit selects pictures from the hard disk according to the release space and stores the pictures into the cache region, namely, the pictures are loaded according to the memory space capable of being accommodated, so that the direct loading from the hard disk is reduced, and the reading times of the hard disk are reduced. The method is suitable for the time when the memory size of each picture has a large difference or the time when picture replacement coefficient calculation is carried out under a small frequency. If the preset threshold is 300k, the used buffer space is 200k, and the memory space that can be accommodated is 100k. If the number of the single picture exceeds 50k, only one picture can be loaded, and if the average number of the single picture is 30k, 2-3 pictures can be loaded.
(2) The buffer area adopts a mode of presetting a threshold picture quantity threshold value, the buffer calculating unit calculates the quantity of the pictures which can be buffered according to the preset quantity of the buffer pictures and the quantity of the used buffer pictures, and the picture storing unit selects the corresponding picture quantity from the hard disk according to the quantity of the pictures which can be buffered and stores the picture quantity into the buffer area. The method is suitable for the time when the memory size of each picture is consistent, or the time when picture replacement coefficient calculation is carried out under high frequency, and the time when multiple pictures are replaced simultaneously. If the threshold number of pictures is 10 pictures, the number of used buffer pictures is 8, or the number of buffer pictures may be 2.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (10)
1. A single chip microcomputer picture buffering processing method is characterized by comprising the following steps:
s1, calculating pictures in a buffer area to obtain sequencing information;
s2, determining the pictures to be deleted from the buffer area according to the sorting information, and deleting the pictures to be deleted;
and S3, selecting pictures from the hard disk and storing the pictures in a buffer area.
2. The picture buffering processing method of the single chip microcomputer according to claim 1, wherein the step of calculating the pictures in the buffer area and acquiring the sorting information comprises the steps of:
s101, acquiring browsing information of each picture;
s102, calculating according to the browsing information of each picture to obtain a replacement coefficient;
s103, sorting according to the numerical value of the replacement coefficient, and acquiring sorting information.
3. The picture buffering processing method of the single chip microcomputer according to claim 2, wherein the browsing information includes picture loading time, display times and display time.
4. The picture buffering processing method of the single chip microcomputer according to any one of claims 1 to 3, wherein the step of selecting a picture from a hard disk and storing the picture in a buffer area comprises the following steps:
s301, calculating a release space of the cache according to a preset threshold and a used cache space;
s302, selecting pictures from the hard disk according to the release space and storing the pictures in a buffer area.
5. The picture buffering processing method of the single chip microcomputer according to any one of claims 1 to 3, wherein the step of selecting a picture from a hard disk and storing the picture in a buffer area comprises the following steps:
s301, calculating the number of pictures which can be buffered according to the preset number of buffered pictures and the number of used buffered pictures;
s302, selecting a corresponding picture number from the hard disk according to the number of pictures which can be buffered, and storing the picture number in a buffer area.
6. The picture buffering processing device is characterized by comprising a picture sequencing module, a picture deleting module and a picture storing module;
the picture sorting module is used for calculating the pictures in the buffer area and acquiring sorting information;
the picture deleting module is used for determining pictures to be deleted from the buffer area according to the sorting information and deleting the pictures to be deleted;
the picture saving module is used for selecting pictures from the hard disk and saving the pictures in the buffer area.
7. The picture buffering processing device of the single chip microcomputer according to claim 6, wherein the picture sorting module comprises a picture information obtaining unit, a calculating unit and a sorting unit;
the picture information acquisition unit is used for acquiring browsing information of each picture;
the calculating unit is used for calculating according to the browsing information of each picture to obtain a replacement coefficient;
the sorting unit is used for sorting according to the value of the replacement coefficient to obtain sorting information.
8. The picture buffering processing device of claim 7, wherein the picture information obtaining unit is configured to obtain a picture loading time, a display number and a display time.
9. The picture buffering processing device of the single chip microcomputer according to any one of claims 6 to 8, wherein the picture saving module comprises a buffering calculation unit and a picture saving unit;
the buffer calculation unit is used for calculating the release space of the buffer according to a preset threshold and the used buffer space;
the picture storage unit is used for selecting pictures from the hard disk according to the release space and storing the pictures in the buffer area.
10. The picture buffering processing device of the single chip microcomputer according to any one of claims 6 to 8, wherein the picture saving module comprises a buffering calculation unit and a picture saving unit;
the buffer calculating unit is used for calculating the number of the pictures which can be buffered according to the preset number of the buffer pictures and the number of the used buffer pictures;
the picture storage unit is used for selecting the corresponding number of pictures from the hard disk and storing the number of the pictures into the buffer area according to the number of the pictures which can be buffered.
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Application publication date: 20221021 |