CN109218799A - Android TV is switched fast method, storage medium, equipment and the system of high definition figure - Google Patents
Android TV is switched fast method, storage medium, equipment and the system of high definition figure Download PDFInfo
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- CN109218799A CN109218799A CN201710528368.9A CN201710528368A CN109218799A CN 109218799 A CN109218799 A CN 109218799A CN 201710528368 A CN201710528368 A CN 201710528368A CN 109218799 A CN109218799 A CN 109218799A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
- H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/231—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion
- H04N21/23106—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion involving caching operations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/81—Monomedia components thereof
- H04N21/8146—Monomedia components thereof involving graphical data, e.g. 3D object, 2D graphics
- H04N21/8153—Monomedia components thereof involving graphical data, e.g. 3D object, 2D graphics comprising still images, e.g. texture, background image
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computer Graphics (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
- Information Transfer Between Computers (AREA)
- Memory System Of A Hierarchy Structure (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses method, storage medium, equipment and systems that a kind of Android TV is switched fast high definition figure, it is related to Android field of television application, method includes the following steps: being Loaded Image using picture loading frame from server, picture bytecode is buffered under local cache catalogue.The buffer memory capacity of memory cache is calculated and be arranged, and picture byte stream is buffered in memory cache.Picture loading frame parses picture byte stream in memory and generates bitmap file.Utilize caching container cached bitmap file in memory.Current visible picture is set to switch to bitmap file adjacent thereto, ImageView directly reads adjacent bitmap file, completes switching.The high definition figure that the present invention is able to achieve Android television field quickly loads.
Description
Technical field
The present invention relates to Android field of television application, and in particular to a kind of Android TV be switched fast high definition figure method,
Storage medium, equipment and system.
Background technique
Ergonomics statistics show that the frequency of the finger click keys of normal person is most 0.02s (20ms) fastly, if plus
Upper signal transmitting can have more than the delay of 5ms with processing, also mean that page response delay time is not in App interactive process
It can exceed that 25ms, this 25ms is exactly MRD (Minimum Respone Delay, minimum response delay).
MRD requires the delay that image switches in practical App interactive process to must not exceed 25ms, if adding the frame of 60ms
Rate, then the minimum time-consuming of whole image switching must not exceed 85ms, and in app development process Bitmap (Bitmap) due to memory
Occupy high, the load time is more time-consuming than text, and also result in that existing app often occurs " first shows aobvious after text
The phenomenon that diagram piece ".Currently, solving the most following of mode of this problem:
(1) it is time-consuming to reduce the load parsing of picture byte stream for compressed picture original size, but there are picture quality drops for which
Low problem；
(2) using new coding of graphics and solution coded format, such as WebP format, in the premise for guaranteeing picture quality
Under, the size of picture is reduced, but WebP has Google proposition, large area is not universal at present, and reliability is unstable；
(3) compression of raw bytes code is carried out during picture local cache using picture loading frame, it is to be added to be loaded into
The decoding and quality for carrying out Bitmap after memory again restore, and which is the main way for quickly loading big figure at present.Wherein compared with
There are the Fresco etc. of Glide, Facebook of Google official for well-known picture loading frame, wherein Glide is good at big spirogram
The smooth load of rolling batch of piece, and Fresco is good at resource optimization.
It can not be as cell phone since man-machine interaction mode is carried out dependent on remote controler in Android television field
End relies on touch mode like that and carries out sliding the quick load that controllable mode carries out high definition picture, and the high definition of cell phone is quick
It is gradual and threshold values control can be carried out to the indentation of picture bytecode, but television is not all right, therefore uses above-mentioned three kinds of sides
The high definition figure that formula is all unable to satisfy Android television field quickly loads.
Summary of the invention
In view of the deficiencies in the prior art, it can be realized in Android television field the purpose of the present invention is to provide a kind of
The method that the Android TV that high definition figure quickly loads is switched fast high definition figure.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of method that Android TV is switched fast high definition figure, method includes the following steps:
S1. it is Loaded Image using picture loading frame from server, picture bytecode is buffered under local cache catalogue；
S2. the buffer memory capacity of memory cache is calculated and be arranged, and picture byte stream is buffered in memory cache；
S3. picture loading frame parses picture byte stream in memory and generates bitmap file；
S4. caching container cached bitmap file in memory is utilized；And
S5. current visible picture is made to switch to bitmap file adjacent thereto, ImageView directly reads adjacent bitmap
File completes switching.
Based on the above technical solution, the step S1 further includes preventing picture rollback switching from picture being caused to repeat to add
The step of load, specifically includes the following steps:
After Loading Image using picture loading frame from server, load label is generated to every picture；
When needing to Load Image again, the url to Load Image is read, building request of loading server picture
Request, and calculate the cryptographic Hash of Request；
The picture bytecode under local cache catalogue is traversed, is read in the corresponding preferences file of picture bytecode of caching
Tag set；
Linear probing is carried out to tag set using Hash lookup algorithm, if there is the matching of picture bytecode to Load Image
The cryptographic Hash of Request then directly reads the picture bytecode saved in corresponding local cache, if without matched picture
Bytecode then accesses server loading of databases picture resource.
Based on the above technical solution, the step S5 further includes picture region caused by preventing switching picture failure
Show abnormal step, specifically includes the following steps:
Pre-cache mechanism is added, built-in timer and timing time is set in pre-cache；
Discharge key-press event；
ImageView reads the caching in caching container, judges whether be cached with bitmap in caching container after the completion of timing
File, if so, the bitmap file of return cache is to ImageView, if it is not, then truncate key event, carries out caching and retries, until
Bitmap file is cached in caching container, ImageView re-reads the bitmap file in caching container.
Based on the above technical solution, the picture loading frame is Glide.
Based on the above technical solution, the buffer memory capacity of memory cache is calculated according to lru algorithm, calculation formula is such as
Under:
CLRU=Core*2+1 (1)
If Count < CLRU, ELRU=Count；If Count > CLRU, ELRU=CLRU；
Wherein, ELRU is L2 cache dynamic capacity, and Core is equipment CPU core calculation, and CLRU is the slow of lru algorithm recommendation
Deposit capacity, Count is picture switch count value, representative be the switching of acyclic patterns following figure piece maximum switching times.
Based on the above technical solution, in step S4, ArrayDeque is used to delay in memory as caching container
Deposit the Bitmap adjacent with current image.
The present invention also provides a kind of storage mediums, are stored thereon with computer program, the computer program is by processor
The step of above method is realized when execution.
The present invention also provides a kind of equipment, including memory, processor and storage are on a memory and in the processor
The step of computer program of upper operation, the processor realizes the above method when executing the computer program.
It can be switched fast in the Android TV that Android television field realizes that high definition figure quickly loads the present invention also provides a kind of
The system of high definition figure.
To achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of system that Android TV is switched fast high definition figure, comprising:
Loading module is used to Load Image from server, and picture bytecode is buffered under local cache catalogue；
Computing module is used to calculate and be arranged the buffer memory capacity of memory cache, and picture byte stream is buffered in memory
In caching；
Parsing module is used to parse picture byte stream in memory and generates bitmap file；And
Caching container is used for cached bitmap file in memory.
Based on the above technical solution, the loading module is Glide picture loading frame, and the caching container is
ArrayDeque。
Compared with the prior art, the advantages of the present invention are as follows:
(1) method that Android TV of the invention is switched fast high definition figure, compared to the handover scheme of conventional high definition picture
Dependent on picture loading frame, tag label has been carried out to level cache on the basis of picture loading frame, has prevented from repeating from clothes
Business device Loads Image, and effectively accelerates the reading of level cache.
(2) capacity of L2 cache is set using picture switch count value to be calculated and be set dynamically, and conventional
The method of fixed value dependent on the setting of CPU core calculation is compared, L2 cache to establish highly efficient property reasonable.
(3) before ImageView reads bitmap file, picture byte stream is parsed in advance and generates bitmap file, thus
When subsequent ImageView reads bitmap file, without waiting the process of parsing picture byte stream again, the load for accelerating picture is cut
Throw-over degree.
(4) it uses caching and retries Cache Retry mechanism, it is therefore prevented that picture region caused by switching picture failure is shown
Abnormal problem.
Detailed description of the invention
Fig. 1 is the flow chart for the method that Android TV is switched fast high definition figure in the embodiment of the present invention；
Fig. 2 is that equipment connects block diagram in the embodiment of the present invention.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
Shown in Figure 1, the embodiment of the present invention provides a kind of method that Android TV is switched fast high definition figure, this method packet
Include following steps:
S1. it is Loaded Image using picture loading frame from server, picture bytecode is buffered under local cache catalogue.
Picture local cache refers to picture level cache, and picture loading frame is Glide in the present embodiment, uses
Glide is buffered under local cache catalogue after carrying out load server picture, and the essence of level cache is picture bytecode, i.e., to scheme
Piece byte code files mode is stored under local cache catalogue.
To prevent picture rollback switching from picture being caused to repeat the problem of loading, during being Loaded Image using Glide, need
Every picture load label Tag is given, then when each rollback switchback, the picture if necessary to load identical url again is then straight
Connect reading caching, the specific steps are as follows:
After Loading Image using picture loading frame from server, load label is generated to every picture；
When needing to Load Image again, the url to Load Image is read, building request of loading server picture
Request, and calculate the cryptographic Hash of Request；
The picture bytecode under local cache catalogue is traversed, is read in the corresponding preferences file of picture bytecode of caching
Tag set.Preferences file namely SharedPreferences file in the present embodiment, SharedPreferences
It is a kind of light-duty data storage method, its essence is that key-value key-value pair data is stored based on XML file, is usually used
To store some simple configuration informations.
Linear probing is carried out to tag set using Hash lookup algorithm, if there is the matching of picture bytecode to Load Image
The cryptographic Hash of Request then directly reads the picture bytecode saved in corresponding local cache, if without matched picture
Bytecode then accesses server loading of databases picture resource.
Handover scheme compared to conventional high definition picture depends on picture loading frame, and the present embodiment is in picture loading frame
On the basis of tag label has been carried out to level cache, prevent repeat Load Image from server, effectively accelerate level cache
It reads.
S2. the buffer memory capacity of memory cache is calculated and be arranged, and picture byte stream is buffered in memory cache.
Picture memory cache is exactly L2 cache, and the present embodiment is cached using the secondary memory of lru algorithm building picture,
LRU (Least Recently Used, least recently used) cache algorithm is a kind of page of Disk Cache memory management
Face replacement algorithm, in memory but unused data block (memory block) is called LRU, operating system can be according to which data
Belong to LRU and is moved out memory and vacating space loads other data.
The essence of L2 cache is picture byte stream ByteInputStream.The present embodiment is slow building memory cache
It uses dynamic capacity to be arranged when depositing capacity, rather than depends on equipment CPU core calculation computing rule.If picture loading procedure
The switch count value Count of middle picture is less than CLRU, then using Count as buffer memory capacity, if Count is greater than CLRU, with
CLRU is buffer memory capacity size, and calculation formula is as follows:
CLRU=Core*2+1 (1)
If Count < CLRU, ELRU=Count；If Count > CLRU, ELRU=CLRU；
Wherein, ELRU is L2 cache dynamic capacity, and Core is equipment CPU core calculation, and CLRU is the slow of lru algorithm recommendation
Deposit capacity, Count is picture switch count value, representative be the switching of acyclic patterns following figure piece maximum switching times.
Due to the capacity of the present embodiment picture L2 cache be set using picture switch count value carry out calculate and dynamic
Setting is compared with the method for the conventional fixed value dependent on the setting of CPU core calculation, and the highly efficient property of establishing of L2 cache is closed
Reason.
S3. picture loading frame parses picture byte stream in memory and generates bitmap file.
Since L2 cache is memory cache, the generation of picture, this reality can be delayed in parsing memory cache picture byte stream
Example is applied before ImageView reads bitmap file, parse picture byte stream in advance and generates bitmap file, thus subsequent
When ImageView reads bitmap file, without waiting the process of parsing picture byte stream again, the load switching speed of picture is accelerated
Degree.
S4. caching container cached bitmap file in memory is utilized.
Caching container in the present embodiment is ArrayDeque, is established on the basis of L2 cache using ArrayDeque
The critical caching of three-level, the three-level caching of picture are exactly upper and lower or left and right critical caching of the picture in current visible picture, three-level
Critical caching caching is the bitmap file generated after having parsed, it is intended to further raw by the picture byte stream parsed
At bitmap file realize that picture is switched fast.
ArrayDeque set is the realization class of Deque interface, it is the deque based on array.General team
Column Queue data structure can only take element in end addition element, head, but ArrayDeque can two-way carry out element end to end
It adds or deletes, because picture switching is related to toggling, it require that three-level caching is able to carry out element operation end to end,
To which ArrayDeque is very suitable to the quick additions and deletions of element two-way end to end and read operation.
Specifically, as the ArrayDeque of caching container in the present embodiment, the size of buffer memory capacity is 3.Work as operating head
When element, tail portion element can be first deleted, tail portion element position is vacateed, then caching container can mend rapidly filling from L2 cache
New element is to tail portion；When if it is access tail portion element, header elements can be first deleted, are then read from L2 cache rapidly
And new element is filled to head, element here refers to the bitmap file generated.
S5. current visible picture is made to switch to bitmap file adjacent thereto, ImageView directly reads adjacent bitmap
File completes switching.
When the right and left key or upper down key for pressing remote controler, current visible picture can switch to picture adjacent thereto,
It is exactly critical picture load.Since the time restriction being switched fast is within 80ms, so if there is critical caching not in time
Caching or caching empty not in time, it may appear that critical picture loads unsuccessful problem, and therefore, the present embodiment is using pre-cache
Mechanism handles the problem, pre-cache can built-in 80ms timer, if critical caching does not complete member also after the completion of timer
Element caching then carries out caching and retries Cache Retry, and truncate key event, caches to element and successfully then continues to switch picture,
Specific step is as follows:
Pre-cache mechanism is added, built-in timer and timing time is set in pre-cache；
Discharge key-press event DispatchKeyEvent；
ImageView reads the caching in caching container, judges whether be cached with bitmap in caching container after the completion of timing
File, if so, the bitmap file of return cache is to ImageView, if it is not, then truncate key event, carries out caching and retries, until
Bitmap file is cached in caching container, ImageView re-reads the bitmap file in caching container.
The processing of DispatchKeyEvent will directly affect the processing of subsequent pictures switching, if
DispatchKeyEvent is intercepted, then button operation can fail, and can not normally be switched so as to cause picture.
In conclusion the embodiment of the present invention depends on picture loading frame compared to the handover scheme of conventional high definition picture,
Tag label has been carried out to level cache on the basis of picture loading frame, has prevented from repeating to Load Image from server, effectively add
The fast reading of level cache.The capacity of L2 cache is set using picture switch count value to be calculated and be set dynamically,
Compared with the method for the conventional fixed value dependent on the setting of CPU core calculation, L2 cache to establish highly efficient property reasonable.?
Before ImageView reads bitmap file, picture byte stream is parsed in advance and generates bitmap file, thus in subsequent ImageView
When reading bitmap file, without waiting the process of parsing picture byte stream again, the load switch speed of picture is accelerated.It uses
Caching retries Cache Retry mechanism, it is therefore prevented that the abnormal problem of picture region display caused by switching picture failure.
The method that corresponding above-mentioned Android TV is switched fast high definition figure, the embodiment of the present invention also provide a kind of storage Jie
Matter is stored thereon with computer program, and the Android electricity in above-described embodiment can be realized when which is executed by processor
The step of method depending on being switched fast high definition figure.It should be noted that storage medium includes USB flash disk, mobile hard disk, ROM (Read-
Only Memory, read-only memory), RAM (Random Access Memory, random access memory), magnetic or disk
Etc. the various media that can store program code.
In addition, shown in Figure 2, the method that corresponding above-mentioned Android TV is switched fast high definition figure, the embodiment of the present invention
A kind of equipment is also provided, including memory, processor and stores the computer journey that can be run on a memory and on a processor
Sequence, the processor can realize that the Android TV in above-described embodiment is switched fast the method for high definition figure when executing computer program
Step.
The embodiment of the present invention also provides a kind of system that Android TV is switched fast high definition figure, including loading module, calculating
Module, parsing module and caching container.
Wherein loading module from server for Loading Image, and picture bytecode is buffered under local cache catalogue.
Loading module in the present embodiment is Glide picture loading frame.
Computing module is used to calculate and be arranged the buffer memory capacity of memory cache, and picture byte stream is buffered in memory cache
In.
Parsing module generates bitmap file for parsing picture byte stream in memory.
Caching container is used for cached bitmap file in memory, and the caching container in the present embodiment is ArrayDeque.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (10)
1. a kind of method that Android TV is switched fast high definition figure, which is characterized in that method includes the following steps:
S1. it is Loaded Image using picture loading frame from server, picture bytecode is buffered under local cache catalogue；
S2. the buffer memory capacity of memory cache is calculated and be arranged, and picture byte stream is buffered in memory cache；
S3. picture loading frame parses picture byte stream in memory and generates bitmap file；
S4. caching container cached bitmap file in memory is utilized；And
S5. current visible picture is made to switch to bitmap file adjacent thereto, ImageView directly reads adjacent bitmap text
Part completes switching.
2. the method that Android TV as described in claim 1 is switched fast high definition figure, it is characterised in that: the step S1 is also wrapped
Including prevents picture rollback switching from picture being caused to repeat the step of loading, specifically includes the following steps:
After Loading Image using picture loading frame from server, load label is generated to every picture；
When needing to Load Image again, the url to Load Image is read, constructs the Request of request of loading server picture, and
Calculate the cryptographic Hash of Request；
The picture bytecode under local cache catalogue is traversed, the mark in the corresponding preferences file of picture bytecode of caching is read
Note set；
Linear probing is carried out to tag set using Hash lookup algorithm, if there is picture bytecode to match the Request that Loads Image
Cryptographic Hash, then directly read the picture bytecode saved in corresponding local cache, if without matched picture bytecode,
Then access server loading of databases picture resource.
3. the method that Android TV as described in claim 1 is switched fast high definition figure, it is characterised in that: the step S5 is also wrapped
The step that picture region display is abnormal caused by preventing switching picture failure is included, specifically includes the following steps:
Pre-cache mechanism is added, built-in timer and timing time is set in pre-cache；
Discharge key-press event；
ImageView reads the caching in caching container, judges whether be cached with bitmap file in caching container after the completion of timing,
If so, the bitmap file of return cache is to ImageView, if it is not, then truncate key event, carries out caching and retry, until caching
Bitmap file is cached in container, ImageView re-reads the bitmap file in caching container.
4. the method that Android TV as described in claim 1 is switched fast high definition figure, it is characterised in that: the picture loads frame
Frame is Glide.
5. the method that Android TV as described in claim 1 is switched fast high definition figure, which is characterized in that according to lru algorithm meter
The buffer memory capacity of memory cache is calculated, calculation formula is as follows:
CLRU=Core*2+1 (1)
If Count < CLRU, ELRU=Count；If Count > CLRU, ELRU=CLRU；
Wherein, ELRU is L2 cache dynamic capacity, and Core is equipment CPU core calculation, and CLRU is that the caching that lru algorithm is recommended holds
Amount, Count be picture switch count value, representative be the acyclic patterns following figure piece switching maximum switching times.
6. the method that Android TV as described in claim 1 is switched fast high definition figure, it is characterised in that: in step S4, use
ArrayDeque caches the Bitmap adjacent with current image as caching container in memory.
7. a kind of storage medium, is stored thereon with computer program, it is characterised in that: the computer program is executed by processor
The step of any one of Shi Shixian the claims 1 to 6 the method.
8. a kind of equipment, including memory, processor and the meter for being stored on the memory and running on the processor
Calculation machine program, it is characterised in that: the processor is realized any in the claims 1 to 6 when executing the computer program
The step of item the method.
9. a kind of system that Android TV is switched fast high definition figure characterized by comprising
Loading module is used to Load Image from server, and picture bytecode is buffered under local cache catalogue；
Computing module is used to calculate and be arranged the buffer memory capacity of memory cache, and picture byte stream is buffered in memory cache
In；
Parsing module is used to parse picture byte stream in memory and generates bitmap file；And
Caching container is used for cached bitmap file in memory.
10. the system that Android TV as claimed in claim 9 is switched fast high definition figure, it is characterised in that: the loading module
For Glide picture loading frame, the caching container is ArrayDeque.
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| US11983397B2 (en) | 2020-07-24 | 2024-05-14 | Boe Technology Group Co., Ltd. | Sliding image container switching display method, device, and storage medium |
| CN112153449A (en) * | 2020-08-19 | 2020-12-29 | 视联动力信息技术股份有限公司 | Screen protection file display method and device, terminal equipment and storage medium |
| CN114416258A (en) * | 2022-01-20 | 2022-04-29 | 四川长虹电器股份有限公司 | Method for optimizing Android picture loading efficiency |
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