CN102118612A - Method and system for acquiring memory resource of audio and video hard decoding chip - Google Patents
Method and system for acquiring memory resource of audio and video hard decoding chip Download PDFInfo
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Abstract
The invention discloses a method and a system for acquiring a memory resource of an audio and video hard decoding chip. The method comprises the following steps that: a main control central processing unit (CPU) calculates a forecast memory resource required value of the audio and video hard decoding chip; the audio and video hard decoding chip calculates a required memory resource required value; the main control CPU compares the two values to acquire a maximum memory resource required value of the two values, and compares the maximum memory resource required value with an assignable maximum value of a system memory; if the maximum memory resource required value is smaller than the assignable maximum value of the system memory, the main control CPU transmits the maximum memory resource required value to the audio and video hard decoding chip; and the audio and video hard decoding chip transmits a memory resource acquiring requirement to an operating system. By the method and the system, the problems of decoding error or abnormity caused by wrong calculation of the memory resource requirement of the audio and video hard decoding chip can be avoided, and the playback quality of audio and video files is enhanced.
Description
Technical field
The invention belongs to multimedia technology field, be specifically related to a kind of acquisition methods and system of audio frequency and video hard decoder chip memory source.
Background technology
Along with the continuous development of Play Technique for Multimedia, the user is also more and more higher to the requirement of audio frequency and video play quality.
When audio-video document is play, audio frequency and video hard decoder chip has played important effect, audio frequency and video hard decoder chip is independent of master cpu, finish audio/video decoding work separately by special IC chip, for example independently audio frequency and video hard decoder chip is substantially all taked in the decompress(ion) of VCD/DVD audio frequency and video and the compression of audio frequency and video.
Because the control program of master cpu and the decoding function of hard decoder IC be separately work independently, make master cpu break away from the program of complex decoding computing, the many costs of saving aspect master cpu, and hard decoder is very low by the master cpu occupancy, the system responses disposal ability promotes greatly, can also carry out multi-job operation in decoding; The more important thing is that hard decoder IC chip also can be absorbed in decoding, thereby makes decoding efficiency be greatly improved.
But, because in a single day audio frequency and video hard decoder chip carries out product approval, the computing unit module of the code/decode format of its support and related hardware system resource allocation etc., just can't adjust, the computing unit module of hardware system resource allocation particularly, in case the system resource that the computing unit module is obtained is calculated and mistake to be occurred, will directly cause decoding error or phenomenon such as unusual; System resource allocation mainly relates to the distribution of memory source again, if so because the computing unit module of hardware system resource allocation goes wrong to the calculating of certain coded format, the decoding error that will cause described coded format film file, and then take place video blank screen, the colored screen, audio frequency has situations such as noise, seriously reduce the quality of multimedia, caused very big influence for watching of user.
How avoiding because the memory source demand mistake in computation of audio frequency and video hard decoder chip causes decoding error or unusual problem, is one of direction of Play Technique for Multimedia area research.
Summary of the invention
The object of the present invention is to provide a kind of acquisition methods of audio frequency and video hard decoder chip memory source, be intended to avoid because the memory source demand mistake in computation of audio frequency and video hard decoder chip, cause decoding error or unusual problem, improve the quality that audio-video document is play.
The embodiment of the invention is achieved in that a kind of acquisition methods of audio frequency and video hard decoder chip memory source, said method comprising the steps of:
Master cpu goes out the first memory source requirements according to the audio frequency and video calculation of parameter of need playing audio-video document, and the described first memory source requirements is the memory source requirements of the audio frequency and video hard decoder chip of master cpu prediction;
Described audio frequency and video hard decoder chip need calculate the second memory source requirements according to described audio frequency and video parameter acquiring audio frequency and video hard decoder chip;
Master cpu compares processing with described first memory source requirements and the described second memory source requirements, obtain the maximum memory resource requirement value among both, and described maximum memory resource requirement value and the assignable maximum of Installed System Memory are analyzed;
If described maximum memory resource requirement value greater than the assignable maximum of Installed System Memory, then is designated mistake;
If with described maximum memory resource requirement value less than the assignable maximum of Installed System Memory, then master cpu passes to described audio frequency and video hard decoder chip with described maximum memory resource requirement value, and described audio frequency and video hard decoder chip sends memory source according to described maximum memory resource requirement value to operating system and obtains request.
An also purpose of the embodiment of the invention is to provide a kind of system that obtains of audio frequency and video hard decoder chip memory source, comprises master cpu and audio frequency and video hard decoder chip,
Described master cpu is used for the audio frequency and video parameter acquiring first memory source requirements according to the need playing audio-video document, the memory source requirements of the audio frequency and video hard decoder chip that the described first memory source requirements goes out for the master cpu prediction and calculation;
Described audio frequency and video hard decoder chip is used for calculating the second memory source requirements according to the audio frequency and video parameter of obtaining by audio frequency and video hard decoder chip;
Described master cpu, described first memory source requirements and the described second memory source requirements are compared processing, obtain the maximum memory resource requirement value among both, and described maximum memory resource requirement value and the assignable maximum of Installed System Memory are analyzed;
When maximum memory resource requirement value during greater than real system internal memory maximum, this memory requirements value is designated mistake, otherwise, then described maximum memory resource requirement value is passed to described audio frequency and video hard decoder chip;
Described audio frequency and video hard decoder chip also is used for sending memory source according to described maximum memory resource requirement value to operating system and obtains request.
The present invention is by being gone out the memory source demand of audio frequency and video hard decoder chip by the master cpu prediction and calculation, the actual memory resource requirement that the memory source demand that calculates and audio frequency and video hard decoder chip are calculated compares, comparing result and the assignable maximum of Installed System Memory are compared, send memory source according to comparative result and obtain request, avoided because the memory source demand mistake in computation of audio frequency and video hard decoder chip, cause decoding error or unusual problem, improved the quality that audio-video document is play.
Description of drawings
The flow chart of the acquisition methods of the audio frequency and video hard decoder chip memory source that Fig. 1 provides for the embodiment of the invention;
The structure chart of the system that obtains of the audio frequency and video hard decoder chip memory source that Fig. 2 provides for the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
The present invention is by being gone out the memory source demand of audio frequency and video hard decoder chip by the master cpu prediction and calculation, the actual memory resource requirement that memory source demand that prediction and calculation is gone out and audio frequency and video hard decoder chip calculate compares, comparing result and the assignable maximum of Installed System Memory are compared, send memory source according to comparative result and obtain request.
Fig. 1 shows the flow process of the acquisition methods of the hard decoder chip memory source that the embodiment of the invention provides.
In step S101, master cpu reads the audio-video document in the memory device, obtains the audio frequency and video parameter of described audio-video document;
In specific implementation process, at first obtain audio-video document;
Then, the data head of the audio-video document that obtains is carried out the code/decode format dissection process, information gets parms, wherein, described parameter information comprises video code model, video size, audio coding form, audio, video data code stream, the audio frequency and video resolution of the audio-video document that obtains, certainly also be not limited to above-mentioned severally, do not enumerate one by one herein;
At last, the parameter information that obtains is converted to the concrete numerical value of corresponding memory source, wherein, this numerical value can carry out mathematical computations as variable.
In step S102, master cpu is sent to audio frequency and video hard decoder chip with the audio frequency and video parameter of obtaining;
In step S103, master cpu goes out the first memory source requirements according to the audio frequency and video calculation of parameter obtained, wherein, and the memory source requirements of the audio frequency and video hard decoder chip that the described first memory source requirements goes out for the master cpu prediction and calculation;
In specific implementation process, master cpu with described parameter as variable, master cpu calculates the first required memory source according to the normalized form and the correction formula of corresponding audio/video encoding/decoding form, and concrete calculation processes is a common practise, no longer describes in detail herein.
Wherein, the order of step S102 and step S103 can exchange, and herein for convenience, S102 is placed on the front with step.
In step S104, described audio frequency and video hard decoder chip goes out the second memory source requirements that audio frequency and video hard decoder chip need obtain according to described audio frequency and video calculation of parameter;
In step S105, described audio frequency and video hard decoder chip feeds back to described master cpu with the described second memory source requirements;
In step S106, master cpu compares processing with described first memory source requirements and the described second memory source requirements, obtains the maximum memory resource requirement value among both;
In step S107, described maximum memory resource requirement value and the assignable maximum of Installed System Memory are analyzed, judge that whether described maximum memory resource requirement value is greater than the assignable maximum of Installed System Memory; If then carry out step S108, otherwise carry out step S1089;
In step S108, described maximum memory resource requirement value is designated mistake; And proceed step S101;
In step S109, master cpu passes to described audio frequency and video hard decoder chip with described maximum memory resource requirement value;
In step S110, described audio frequency and video hard decoder chip sends memory source according to described maximum memory resource requirement value to operating system and obtains request.
Fig. 2 shows the structure of the system that obtains of the audio frequency and video hard decoder chip memory source that the embodiment of the invention provides, and described system comprises master cpu 21 and audio frequency and video hard decoder chip 22.
Wherein, master cpu 21 reads the audio-video document in the memory device, obtains the audio frequency and video parameter of described audio-video document, and described audio frequency and video parameter is sent to audio frequency and video hard decoder chip 22.
In specific implementation process, described master cpu 21 obtains audio-video document, the data head of audio-video document is carried out the code/decode format dissection process, information gets parms, and described parameter information is converted to the concrete numerical value of corresponding memory source, wherein, this numerical value can carry out mathematical computations as variable;
Wherein, described parameter information comprises video code model, video size, audio coding form, audio, video data code stream, the audio frequency and video resolution of described audio-video document, also is not limited to above-mentioned severally certainly, does not enumerate one by one herein.
In specific implementation process, described master cpu 21 with described audio frequency and video parameter as variable, calculate the first required memory source according to described master cpu 2 according to the normalized form and the correction formula of corresponding audio/video encoding/decoding form, concrete calculation processes is a common practise, no longer describes in detail herein.
Described audio frequency and video hard decoder chip 22 goes out the second memory source requirements that audio frequency and video hard decoder chip need obtain according to described audio frequency and video calculation of parameter, and the described second memory source requirements is fed back to described master cpu 21.
Described master cpu 21 compares processing with described first memory source requirements and the described second memory source requirements, obtain the maximum memory resource requirement value among both, and described maximum memory resource requirement value and the assignable maximum of Installed System Memory be analyzed:
If maximum memory resource requirement value is greater than the assignable maximum of Installed System Memory, described master cpu 21 is designated mistake with maximum memory resource requirement value;
If maximum memory resource requirement value is not more than the assignable maximum of Installed System Memory, described master cpu 21 passes to described audio frequency and video hard decoder chip 22 with described maximum memory resource requirement value;
Described audio frequency and video hard decoder chip 22 sends memory source according to described maximum memory resource requirement value to operating system and obtains request.
The present invention is by being gone out the memory source demand of audio frequency and video hard decoder chip by the master cpu prediction and calculation, the actual memory resource requirement that memory source demand that prediction and calculation is gone out and audio frequency and video hard decoder chip calculate compares, comparing result and the assignable maximum of Installed System Memory are compared, send memory source according to comparative result and obtain request, avoided because the memory source demand mistake in computation of audio frequency and video hard decoder chip, cause decoding error or unusual problem, improved the quality that audio-video document is play.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (8)
1. the acquisition methods of an audio frequency and video hard decoder chip memory source is characterized in that, said method comprising the steps of:
Master cpu is according to the audio frequency and video parameter acquiring first memory source requirements of need playing audio-video document, and the described first memory source requirements goes out the memory source requirements of audio frequency and video hard decoder chip for the master cpu prediction and calculation;
Described audio frequency and video hard decoder chip calculates the second memory source requirements that audio frequency and video hard decoder chip need obtain according to described audio frequency and video parameter;
Master cpu compares processing with described first memory source requirements and the described second memory source requirements, obtain the maximum memory resource requirement value among both, and described maximum memory resource requirement value and the assignable maximum of Installed System Memory are analyzed;
If described maximum memory resource requirement value then is designated mistake greater than the assignable maximum of Installed System Memory;
If described maximum memory resource requirement value is less than the assignable maximum of Installed System Memory, then master cpu passes to described audio frequency and video hard decoder chip with described maximum memory resource requirement value, and described audio frequency and video hard decoder chip sends memory source according to described maximum memory resource requirement value to operating system and obtains request.
2. the acquisition methods of audio frequency and video hard decoder chip memory source as claimed in claim 1, it is characterized in that, before described master cpu went out the step of the first memory source requirements according to the audio frequency and video calculation of parameter of need playing audio-video document, described method also comprised:
Master cpu reads the audio-video document in the memory device, obtains the audio frequency and video parameter of described audio-video document;
Master cpu is sent to audio frequency and video hard decoder chip with described audio frequency and video parameter.
Calculate after the step of the second memory source requirements, described method also comprises:
Described audio frequency and video hard decoder chip feeds back to described master cpu with the described second memory source requirements.
3. the acquisition methods of audio frequency and video hard decoder chip memory source as claimed in claim 2 is characterized in that described master cpu reads the audio-video document in the memory device, and the step of obtaining the audio frequency and video parameter of described audio-video document specifically comprises:
Obtain audio-video document;
The data head of audio-video document is carried out the code/decode format dissection process, and information gets parms; Described parameter information comprises video code model, video size, audio coding form, audio, video data code stream, the audio frequency and video resolution of described audio-video document;
Described parameter information is converted to the concrete numerical value of corresponding memory source, and wherein, this numerical value can carry out mathematical computations as variable.
4. the acquisition methods of audio frequency and video hard decoder chip memory source as claimed in claim 1 is characterized in that, described master cpu specifically comprises according to the step of the described parameter acquiring first memory source requirements:
Described audio frequency and video parameter is passed to master cpu as variable, and master cpu calculates the first required memory source according to the normalized form and the correction formula of corresponding audio/video encoding/decoding form.
5. the system that obtains of an audio frequency and video hard decoder chip memory source comprises master cpu and audio frequency and video hard decoder chip, it is characterized in that,
Described master cpu is used for the audio frequency and video parameter acquiring first memory source requirements according to the need playing audio-video document, the memory source requirements of the audio frequency and video hard decoder chip that the described first memory source requirements goes out for the master cpu prediction and calculation;
Described audio frequency and video hard decoder chip is used for calculating the second memory source requirements according to the audio frequency and video parameter of obtaining by audio frequency and video hard decoder chip;
Described master cpu, described first memory source requirements and the described second memory source requirements are compared processing, obtain the maximum memory resource requirement value among both, and described maximum memory resource requirement value and the assignable maximum of Installed System Memory are analyzed;
When maximum memory resource requirement value during greater than real system internal memory maximum, this memory requirements value is designated mistake, otherwise, then described maximum memory resource requirement value is passed to described audio frequency and video hard decoder chip;
Described audio frequency and video hard decoder chip also is used for sending memory source according to described maximum memory resource requirement value to operating system and obtains request.
6. the system that obtains of audio frequency and video hard decoder chip memory source as claimed in claim 5 is characterized in that,
Described master cpu also is used for reading the audio-video document of memory device, obtains the audio frequency and video parameter of described audio-video document, and described audio frequency and video parameter is sent to audio frequency and video hard decoder chip.
7. the system that obtains of audio frequency and video hard decoder chip memory source as claimed in claim 5 is characterized in that,
Described master cpu also is used to obtain audio-video document, and the data head of audio-video document is carried out the code/decode format dissection process, information gets parms, and described parameter information is converted to the concrete numerical value of corresponding memory source, wherein, this numerical value can carry out mathematical computations as variable;
Described parameter information comprises video code model, video size, audio coding form, audio, video data code stream, the audio frequency and video resolution of described audio-video document.
8. the system that obtains of audio frequency and video hard decoder chip memory source as claimed in claim 5 is characterized in that,
Described master cpu also is used for parameter with described audio-video document as variable, and described master cpu calculates the first required memory source according to the normalized form and the correction formula of corresponding audio/video encoding/decoding form.
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| CN 200910113692 CN102118612B (en) | 2009-12-31 | 2009-12-31 | Method and system for acquiring memory resource of audio and video hard decoding chip |
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Cited By (6)
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| CN102724584A (en) * | 2012-06-18 | 2012-10-10 | Tcl集团股份有限公司 | Method and device for playing network videos online and smart television |
| CN103096163A (en) * | 2011-11-01 | 2013-05-08 | 中国移动通信集团公司 | Media player and play method of media file |
| CN103562869A (en) * | 2011-12-14 | 2014-02-05 | 华为技术有限公司 | Method and device for processing audio frequency in virtual environment |
| CN107229516A (en) * | 2016-03-24 | 2017-10-03 | 中兴通讯股份有限公司 | A kind of data processing method and device |
| CN108282696A (en) * | 2018-02-07 | 2018-07-13 | 北京易讯理想科技有限公司 | A kind of hardware resource distribution method that sequence frame image plays |
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| US5668948A (en) * | 1994-09-08 | 1997-09-16 | International Business Machines Corporation | Media streamer with control node enabling same isochronous streams to appear simultaneously at output ports or different streams to appear simultaneously at output ports |
| US7317957B1 (en) * | 1997-09-24 | 2008-01-08 | Sony Corporation | Memory allocation for real-time audio processing |
| CN2426255Y (en) * | 2000-06-08 | 2001-04-04 | 曾凯 | Indication structure simplified Chinese pager |
| CN100372348C (en) * | 2004-07-28 | 2008-02-27 | 沈逸林 | Application and communication method of terminal of network media phone |
| CN1319384C (en) * | 2005-01-27 | 2007-05-30 | 浙江大学 | Optimizing distribution method in moving evaluation for hardware computing power resource |
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| CN103096163A (en) * | 2011-11-01 | 2013-05-08 | 中国移动通信集团公司 | Media player and play method of media file |
| CN103096163B (en) * | 2011-11-01 | 2015-12-09 | 中国移动通信集团公司 | The player method of media player and media file |
| CN103562869A (en) * | 2011-12-14 | 2014-02-05 | 华为技术有限公司 | Method and device for processing audio frequency in virtual environment |
| CN103562869B (en) * | 2011-12-14 | 2016-12-21 | 华为技术有限公司 | Audio-frequency processing method under virtualized environment and equipment |
| CN102724584A (en) * | 2012-06-18 | 2012-10-10 | Tcl集团股份有限公司 | Method and device for playing network videos online and smart television |
| CN102724584B (en) * | 2012-06-18 | 2016-07-27 | Tcl集团股份有限公司 | The online player method of Internet video, the online playing device of video and intelligent television |
| CN107229516A (en) * | 2016-03-24 | 2017-10-03 | 中兴通讯股份有限公司 | A kind of data processing method and device |
| CN107229516B (en) * | 2016-03-24 | 2020-12-29 | 中兴通讯股份有限公司 | Data processing method and device |
| CN108282696A (en) * | 2018-02-07 | 2018-07-13 | 北京易讯理想科技有限公司 | A kind of hardware resource distribution method that sequence frame image plays |
| CN109640179A (en) * | 2018-11-27 | 2019-04-16 | Oppo广东移动通信有限公司 | Video frequency decoding control method, device and electronic equipment |
| CN109640179B (en) * | 2018-11-27 | 2020-09-22 | Oppo广东移动通信有限公司 | Video decoding control method and device and electronic equipment |
| US11456013B2 (en) | 2018-11-27 | 2022-09-27 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Video decoding control method, electronic device, and storage medium |
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