CN102074257A - Software and hardware-decoding general multi-media playing equipment and playing method thereof - Google Patents
Software and hardware-decoding general multi-media playing equipment and playing method thereof Download PDFInfo
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Abstract
The invention discloses software and hardware-decoding general multi-media playing equipment, which comprises a multi-media information acquisition device, a multi-media processing device and a multi-media display device. The general multi-media playing equipment is characterized in that: the multi-media processing device comprises a file analyzing module for analyzing multi-media information according to the types of multi-media files, a decoding module for decoding analyzed multi-media audio/video steaming information and an output module for receiving the multi-media information decoded by the decoding module and outputting the multi-media information to the multi-media display device for displaying. The general multi-media playing equipment can utilize processing capacity of a hardware platform to a maximum degree and improve the processing capacity of multi-media.
Description
Technical field
The invention belongs to the digital multimedia technical field, be specifically related to a kind of universal multimedia playback equipment and player method thereof of software and hardware combining decoding.
Background technology
Along with the embedded technology development, in the last few years, various intelligent terminal products all developed rapidly, for example high-definition multimedia terminal, all-in-one, mobile digital TV and hand held television terminal or the like.In the intelligent terminal product, a very important function is exactly a multimedia function, comprises browsing pictures, broadcast, recording audio/video.Along with people's growth in the living standard, people are also more and more higher to the requirement of the multimedia processing capability of intelligent terminal, can play the HD video of various forms such as waiting in expectation on MP4.On the existing various intelligent terminal, the realization of its multimedia segment function varies, and therefore for the encoding and decoding part of audio frequency and video most crucial in the multimedia, the realization based on pure software is arranged, and hardware based realization is also arranged.
In the prior art, usefulness more adopts the pure software decoding to realize this mode, and be low for code check, the result of broadcast that the video that resolution is low, pure software still can obtain to expect, but for HD video, its processing power limited with its CPU processing power of being moved.Go to realize this mode of encoding and decoding based on hardware, generally be utilize special hardware in going to realize decoding some link more consuming time or remove to realize the decoding video stream of specific format by special demoder, generally speaking hardware decoding processing ability is strong than software decode, but because the difference of various hardware platforms, therefore caused the solution of various hardware decodings to vary, be difficult to a unified solution and can be applicable to more hardware platform.The present invention therefore.
Summary of the invention
The object of the invention is to provide a kind of universal multimedia playback equipment of software and hardware combining decoding, and software decode poor effect when having solved in the prior art intelligent terminal product play multimedia files, decoding speed is slow and the hardware decoding is difficult to problems such as general.
In order to solve these problems of the prior art, technical scheme provided by the invention is:
A kind of universal multimedia playback equipment of software and hardware combining decoding, comprise multimedia information acquisition device, multimedia processing apparatus and multi-media display device, it is characterized in that described multimedia processing apparatus comprises the document analysis module of multimedia messages being resolved according to the type of multimedia file, the multimedia audio/video stream information after resolving is carried out decoding module and accepts the decoded multimedia messages of decoder module and export to the output module that multi-media display device shows for multi-media display device.
Preferably, described decoder module is selected from and calls the hardware decoder module that decoding hardware decodes to multimedia messages and call the software decode module that the decoding software relevant with multimedia messages decoded, and the decoding speed that described document analysis module is resolved the multimedia messages judgement multimedia messages of back multimedia processing apparatus after according to parsing to multimedia messages calls hardware decoder module or software decode module.
Preferably, described equipment also comprises multimedia playback control apparatus, and described multimedia playback control apparatus is accepted the instruction of user's input according to user instruction control coordination multimedia information acquisition device, multimedia processing apparatus and multi-media display device work.
Preferably, described multimedia processing apparatus also comprises and is arranged on the form judge module of the file layout of multimedia messages being judged before the document analysis, described form judge module carries out after file layout is judged file layout being transferred to the document analysis module, and described document analysis module resolves to audio and video stream with multimedia messages.
Preferably, between described document analysis module and decoder module the multimedia separation module is set, described multimedia separation module separates audio stream according to the result of document analysis module parses with video flowing, and submits to multimedia playback control apparatus for multimedia playback control apparatus Control Allocation decoder module; Described decoder module carries out decode operation according to the instruction of multimedia playback control apparatus to the media stream that obtains, and the media stream behind the decode operation is exported to the multi-media display device demonstration by output module.
Preferably, described decoder module comprises decoding kernel, Registering modules and several and concrete decode component, and described concrete decode component is registered to the decoding kernel by Registering modules, joins in the decoder module; When described decoder module is decoded, the concrete decode component of described multimedia playback control apparatus inquiry decoding kernel, the handle by concrete decode component calls concrete decode component and carries out decode operation.
Preferably, realize communicating by letter of intermodule by shared buffer between described decoder module and document analysis intermodule, described decoder module and output module.
Another object of the present invention is to provide a kind of and carry out the method that universal multimedia is play, it is characterized in that said method comprising the steps of by the software and hardware combining decoding:
(1) according to the multimedia file type multimedia messages is resolved, form audio stream and or Video stream information;
(2) the multimedia audio/video stream information after resolving is decoded by way of hardware and software combination;
(3) will accept the decoded multimedia messages output of decoder module shows.
Preferably, described step (2) selects to use software decode module or hardware decoder module according to the decoding speed of multimedia audio/video stream information when decoding.
Preferably, several concrete decode component of pre-registration in the described decoder module, when decoding, multimedia playback control apparatus carries out decode operation by the concrete decode component of decoding kernel calls, and multimedia playback control apparatus control decoding back multimedia audio/video stream information is exported or stored behind the decode operation.
Preferably, realize communicating by letter of intermodule by shared buffer between described decoder module and document analysis intermodule, described decoder module and output module.
The present invention proposes a kind of multimedia play equipment of general software and hardware combining, multimedia software and hardware decoding organically can be combined, for general audio frequency and video, directly adopt software decode, for the inefficient decoding task of software, can directly adopt the hardware decoding, accelerate decoding speed.And the function interface of hardware decoding of the present invention is unified, is not subject to concrete hardware platform, and therefore whole solution has good portability, may operate on the different hardware platforms.
The multimedia play equipment of the software and hardware combining that the present invention is general mainly comprises multimedia processing apparatus and multimedia playback control apparatus that sets gradually.Multimedia processing apparatus comprises the file layout judge module, the document analysis module, the audio frequency and video separation module, audio/video decoding module or the like, each module is registered in the multimedia playback control apparatus with the form of plug-in unit, multimedia playback control apparatus then is responsible for accepting user's various command, and goes to coordinate the work of each module according to user's order, is to communicate by letter by shared buffer between module and the module.
Wherein, the audio/video decoding module then is divided into two kinds of software decode module and hardware decoder modules, and two kinds of modules all have oneself a decoding kernel respectively, are responsible for carrying out alternately with multimedia playback control apparatus.The hardware decoder module has particularly comprised hardware decoding kernel and various hardware decode component.Hardware decoding kernel and various hardware decode component are all followed concrete codes and standards, various hardware vendors go to go to realize according to concrete codes and standards hardware-core and the hardware decode component of oneself, and multimedia playback control apparatus carries out alternately with various hardware decode component by calling hardware-core then.For the software decode module, its process is consistent with the hardware decoder module, be concrete decode component be to realize by pure software.
The file parsing module is responsible for required audio frequency and video form to be processed is judged and resolved in the whole multimedia playback equipment.Judge Container Format and the coding institute accepted standard of promptly judging audio-video document, resolve and promptly from audio-video document, parse relevant label information, such as mp3 file, parse composer, school, information such as affiliated special edition.In the present invention, audio frequency and video format design document analysis module that can some are commonly used.
Decoder module is divided into hardware decoder module and software decode module.Hardware decoder module and software decode module all exist with the form of .so dynamic link library, go to call it by multimedia playback control apparatus when needs are decoded.By going to inquire about hardware (software) kernel, obtain to have which hardware (software) decode component in the current system in the time of the operation of hardware (software) decoder module, the handle by correspondence goes to call concrete hardware (software) decode component then.Each concrete hardware (software) decode component all must be followed certain standard, and must go registration to hardware (software) kernel before being called, so that decoded module inquires.The difference of hardware and software decoder module is that the former is that special hardware by the hardware vendor goes to realize that the latter goes to realize by software mode.In the present invention, the software decode module can be by realizing the encapsulation of ffmpeg storehouse.
Output module is after decoding through decoder module, what flow out from decoder module promptly is original audio and video data streams, by output module, original audio and video data streams can be sent to the place of appointment, remove to show or be written to file such as being sent to display system.
With respect to scheme of the prior art, advantage of the present invention is:
In the present invention, in fact be exactly the various differential shadings of software decode and hardware decoding are fallen, for the multimedia framework on upper strata provides a unified calling interface; Such as other multi-medium play method, the present invention can utilize the processing power of hardware platform to greatest extent, improves multimedia processing power.And, by unified interface, various hardware decoding parts are carried out abstract, thereby shielded difference between the different hardware, make multimedia play equipment have good portability.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described:
Fig. 1 is the structured flowchart of the universal multimedia playback equipment of embodiment of the invention software and hardware combining decoding;
Fig. 2 is the workflow diagram of embodiment of the invention decoder module;
Fig. 3 carries out the process flow diagram that universal multimedia is play for the embodiment of the invention.
Embodiment
Below in conjunction with specific embodiment such scheme is described further.Should be understood that these embodiment are used to the present invention is described and are not limited to limit the scope of the invention.The implementation condition that adopts among the embodiment can be done further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in the normal experiment.
Embodiment
Be illustrated in figure 1 as the universal multimedia playback equipment of the software and hardware combining decoding that the embodiment of the invention can use, comprise multimedia information acquisition device, multimedia processing apparatus, multi-media display device and multimedia playback control apparatus, described multimedia processing apparatus comprise and are arranged on the form judge module of the file layout of multimedia messages being judged before the document analysis, the document analysis module of multimedia messages being resolved according to the type of multimedia file, multimedia audio/video stream information after resolving is carried out decoding module and accepts the output module that the decoded multimedia messages of decoder module is exported to the demonstration of multi-media display device confession multi-media display device; Described form judge module carries out after file layout is judged file layout being transferred to the document analysis module, and described document analysis module resolves to audio and video stream with multimedia messages.
Decoder module is selected from and calls the hardware decoder module that decoding hardware decodes to multimedia messages and call the software decode module that the decoding software relevant with multimedia messages decoded, and the decoding speed that described document analysis module is resolved the multimedia messages judgement multimedia messages of back multimedia processing apparatus after according to parsing to multimedia messages calls hardware decoder module or software decode module.Multimedia playback control apparatus is accepted the instruction of user's input according to user instruction control coordination multimedia information acquisition device, multimedia processing apparatus and multi-media display device work.
The multimedia separation module is set between document analysis module and decoder module, described multimedia separation module separates audio stream according to the result of document analysis module parses with video flowing, and submits to multimedia playback control apparatus for multimedia playback control apparatus Control Allocation decoder module; Described decoder module carries out decode operation according to the instruction of multimedia playback control apparatus to the media stream that obtains, and the media stream behind the decode operation is exported to the multi-media display device demonstration by output module.
Decoder module comprises decoding kernel, Registering modules and several and concrete decode component, and described concrete decode component is registered to the decoding kernel by Registering modules, joins in the decoder module; When described decoder module is decoded, the concrete decode component of described multimedia playback control apparatus inquiry decoding kernel, the handle by concrete decode component calls concrete decode component and carries out decode operation.Realize communicating by letter of intermodule by shared buffer between described decoder module and document analysis intermodule, described decoder module and output module.
When carrying out the universal multimedia broadcast, operate in the following way playback equipment inside:
(1) according to the multimedia file type multimedia messages is resolved, form audio stream and or Video stream information;
(2) the multimedia audio/video stream information after resolving is decoded by way of hardware and software combination;
(3) will accept the decoded multimedia messages output of decoder module shows.
Wherein step (2) selects to use software decode module or hardware decoder module according to the decoding speed of multimedia audio/video stream information when decoding.Several concrete decode component of pre-registration in the described decoder module, when decoding, multimedia playback control apparatus carries out decode operation by the concrete decode component of decoding kernel calls, and multimedia playback control apparatus control decoding back multimedia audio/video stream information is exported or stored behind the decode operation.Realize communicating by letter of intermodule by shared buffer between described decoder module and document analysis intermodule, described decoder module and output module.
More than be to realize communicating by letter between module and the module between each module by shared buffer, before using module, must connect it so that the data after from module, obtaining processing.In whole multimedia equipment, most important is exactly decoder module.Be that software decode module and corresponding software decode kernel commonly used realized in the decoding storehouse with ffmpeg in this multimedia equipment at present.
It is as follows that the multimedia equipment on upper strata and hardware (software) kernel carries out mutual process, the interaction figure of whole process such as Fig. 2.：
1) kernel is by the initialization of Init () function;
2) multimedia framework passes through ComponentEnum() function goes to inquire about the current decode component of registering in kernel;
3) the decode component information that obtains by inquiry of multimedia framework determines whether adopting current decode component to decode, if adopt this decode component, then further passes through GetHandle() obtain the handle of this decode component;
4) handle and the decode component by decode component communicates, and the frame data that at first will need to decode are sent to decode component, obtains decoded data then from decode component, it is sent in the multimedia framework goes;
5) discharge decode component by FreeHandle ();
6) discharge control by Free () to kernel.
It is as follows that multimedia playback control apparatus and hardware (software) decode component is carried out mutual process:
1) calling ComponentInit () by the decode component handle comes decode component is carried out initialization;
2) after initialization, by SetParamter () the current parameter that needs frame decoding is set, such as present frame sequence numbering and current audio frequency and video timestamp are set.
3) construct corresponding decode component example by ConstructComponent (), pass through Decode(then) function decodes to current frame data, and the realization of concrete decode procedure is to rely on pure software to realize or hardware is realized.
3) obtain current decoded data by GetDecode () function, and it is sent in the multimedia playback control apparatus goes.
For the better explanation method that arrives involved in the present invention, the example with a concrete voice playing illustrates the flow process that the whole multimedia broadcast control device is handled multimedia below:
The various functions of hardware vendor's decode component of going to realize among the present invention and proposed with oneself SDK at first; In the present invention, all audio/video decoding assembly encoding and decoding to as if the data of the compression of a frame frame, be not a section audio/video flow, so the hardware vendor need go to go to realize various functions in the decode frame data with its hardware component, such as inverse quantization computing, entropy computing or the like.
The hardware vendor removes to realize a decoder module kernel according to default standard, and the multimedia playback control apparatus (also can realize by software) by kernel and upper strata carries out alternately; When realizing kernel, the various decode component that need to have realized are registered in the kernel, and processing power and some parameter informations of each module will be registered to kernel, make things convenient for the multimedia playback control apparatus inquiry.
In multimedia playback control apparatus, by revising configuration file, the hardware-core that realizes is registered in the multimedia playback control apparatus (or media engine that software is realized in the multimedia playback control apparatus) with the form of module (node) goes, can call this decode node with multimedia playback control apparatus (or media engine that software is realized in the multimedia playback control apparatus).
Media engine by software realization in the multimedia playback control apparatus, create a multimedia object, the multimedia object calls modules different in the whole playing frame by calling multimedia playback control apparatus, the media engine that software is realized in the multimedia playback control apparatus is judged handled file layout by the form judge module, removes to call corresponding decoder module according to the audio frequency and video form then and removes decoded data.
Below the situation of acquiescence, output data behind the audio/video decoding directly outputs in the file, be not to output in audio output apparatus or the display system, to with user of the present invention, can output to and go in the appointed equipment to play or show by revising the data of output module after audio/video decoding.
Above-mentioned example only is explanation technical conceive of the present invention and characteristics, and its purpose is to allow the people who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalent transformations that spirit is done according to the present invention or modification all should be encompassed within protection scope of the present invention.
Claims (10)
1.. a kind of universal multimedia playback equipment of software and hardware combining decoding, comprise multimedia information acquisition device, multimedia processing apparatus and multi-media display device, it is characterized in that described multimedia processing apparatus comprises the document analysis module of multimedia messages being resolved according to the type of multimedia file, the multimedia audio/video stream information after resolving is carried out decoding module and accepts the decoded multimedia messages of decoder module and export to the output module that multi-media display device shows for multi-media display device.
2. the universal multimedia playback equipment of software and hardware combining decoding according to claim 1, it is characterized in that described decoder module is selected from calls the hardware decoder module that decoding hardware decodes to multimedia messages and calls the software decode module that the decoding software relevant with multimedia messages decoded, and the decoding speed that described document analysis module is resolved the multimedia messages judgement multimedia messages of back multimedia processing apparatus after according to parsing to multimedia messages calls hardware decoder module or software decode module.
3. the universal multimedia playback equipment of software and hardware combining decoding according to claim 2, it is characterized in that described equipment also comprises multimedia playback control apparatus, described multimedia playback control apparatus is accepted the instruction of user's input according to user instruction control coordination multimedia information acquisition device, multimedia processing apparatus and multi-media display device work.
4. the universal multimedia playback equipment of software and hardware combining decoding according to claim 3, it is characterized in that described multimedia processing apparatus also comprises is arranged on the form judge module of the file layout of multimedia messages being judged before the document analysis, described form judge module carries out after file layout is judged file layout being transferred to the document analysis module, and described document analysis module resolves to audio and video stream with multimedia messages.
5. the universal multimedia playback equipment of software and hardware combining decoding according to claim 4, it is characterized in that between described document analysis module and decoder module the multimedia separation module being set, described multimedia separation module separates audio stream according to the result of document analysis module parses with video flowing, and submits to multimedia playback control apparatus for multimedia playback control apparatus Control Allocation decoder module; Described decoder module carries out decode operation according to the instruction of multimedia playback control apparatus to the media stream that obtains, and the media stream behind the decode operation is exported to the multi-media display device demonstration by output module.
6. the universal multimedia playback equipment of software and hardware combining decoding according to claim 3, it is characterized in that described decoder module comprises decoding kernel, Registering modules and several and concrete decode component, described concrete decode component, joins in the decoder module to the registration of decoding kernel by Registering modules; When described decoder module is decoded, the concrete decode component of described multimedia playback control apparatus inquiry decoding kernel, the handle by concrete decode component calls concrete decode component and carries out decode operation.
7. one kind is carried out the method that universal multimedia is play by software and hardware combining decoding, it is characterized in that said method comprising the steps of:
(1) according to the multimedia file type multimedia messages is resolved, form audio stream and or Video stream information;
(2) the multimedia audio/video stream information after resolving is decoded by way of hardware and software combination;
(3) will accept the decoded multimedia messages output of decoder module shows.
8. method according to claim 7 is characterized in that described step (2) selects to use software decode module or hardware decoder module according to the decoding speed of multimedia audio/video stream information when decoding.
9. method according to claim 7, it is characterized in that several concrete decode component of pre-registration in the described decoder module, when decoding, multimedia playback control apparatus carries out decode operation by the concrete decode component of decoding kernel calls, and multimedia playback control apparatus control decoding back multimedia audio/video stream information is exported or stored behind the decode operation.
10. method according to claim 7 is characterized in that realizing communicating by letter of intermodule by shared buffer between described decoder module and document analysis intermodule, described decoder module and output module.
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