Summary of the invention
Technical problem to be solved by this invention realizes playing BHD file by ordinary playing device.
For solving the problems of the technologies described above, the invention provides a kind of method sharing broadcasting BHD file based on DLNA, comprising step:
DLNA server and DLNA client connect, and wherein said DLNA server comprises http server;
DLNA server notice DLNA client is opened and displaying video, and the address of described video is the URL of http protocol, the IP port containing http server in URL and BHD file address information;
After DLNA client is notified, the player of DLNA client sends BHD file request to http server,
After http server receives request, find corresponding BHD file;
Format converting module in http server reads and resolves described BHD file;
Described BHD file transform is MP4 file by described format converting module, generates MP4 formatted file head and video data district offset relationship in internal memory;
Http server sends MP4 formatted file head and video data district to the player of DLNA client;
After the player of DLNA client receives MP4 formatted file head and video data district, displaying video.
Preferably, described BHD file transform is MP4 file by described format converting module, generates MP4 formatted file head and video data district offset relationship, be further in internal memory,
Described format converting module reads BHD file header, resolves one-level index, finds the position of each secondary index;
Whether described format converting module reads and resolves each secondary index, obtain the document location of each frame frequency data, size of data, timestamp and be key frame information;
According to document location, size of data, the timestamp of every one-frame video data with whether be key frame information, according to the form of MP4 file header, composition MP4 file header;
The video data district of BHD file, directly as the video data district of MP4 file.
Preferably, described BHD file, is further,
The index of described BHD file is made up of one-level index and secondary index, containing one-level index in BHD file header, the content of one-level index is each secondary index positional information hereof, the secondary index of BHD file is distributed in video data district, and whether the content of each secondary index is document location, size of data, the timestamp of concrete every one-frame video data of its correspondence and is key frame information.
Preferably, described MP4 file, is further,
The index of MP4 file, only has one-level index, and in MP4 file header, whether its one-level index contains document location, size of data, the timestamp of all video datas in file and be key frame information.
Preferably, described DLNA client, further, is made up of separately DLNA renderer.
Preferably, described DLNA server, further, is made up of DLNA data server and DLNA controller.
Compared with prior art, the method sharing broadcasting BHD file based on DLNA of the present invention, reaches following effect:
1) the application is by DLNA agreement and http server, is converted to MP4 file, achieves the broadcasting of ordinary playing device to BHD file by virtual for BHD file;
2) BHD file and the difference of MP4 file are that file header form is different, but video data district is the same.According to BHD file generated MP4 file header, video data need not be changed, and this process operand is minimum additionally need not take disk storage space;
3) ordinary playing device is to server request BHD file, but actual what receive is MP4 file.Realize playing possibility;
4) use DLNA agreement, its concrete control flow is all completed by DLNA server and DLNA client inside.User only needs to specify BHD file to be played, need not complex operations, and simplify the operation flow process.
Embodiment
As employed some vocabulary to censure specific components in the middle of specification and claim.Those skilled in the art should understand, and hardware manufacturer may call same assembly with different noun.This specification and claims are not used as with the difference of title the mode distinguishing assembly, but are used as the criterion of differentiation with assembly difference functionally." comprising " as mentioned in the middle of specification and claim is in the whole text an open language, therefore should be construed to " comprise but be not limited to "." roughly " refer to that in receivable error range, those skilled in the art can solve the technical problem within the scope of certain error, reach described technique effect substantially.In addition, " couple " word and comprise directly any and indirectly electric property coupling means at this.Therefore, if describe a first device in literary composition to be coupled to one second device, then represent described first device and directly can be electrically coupled to described second device, or be indirectly electrically coupled to described second device by other devices or the means that couple.Specification subsequent descriptions is for implementing better embodiment of the present invention, and right described description is to illustrate for the purpose of rule of the present invention, and is not used to limit scope of the present invention.Protection scope of the present invention is when being as the criterion depending on the claims person of defining.
Below in conjunction with accompanying drawing, the present invention is described in further detail, but not as a limitation of the invention.
Embodiment 1:
Composition graphs 1, present embodiments provides a kind of method sharing broadcasting BHD file based on DLNA, comprises step:
Step 101:DLNA server and DLNA client connect, and wherein said DLNA server comprises http server;
DLNA comprises data server, controller, renderer three part, and in the application, DLNA data server and DLNA controller form service end jointly, is DLNA server.DLNA renderer forms client separately, is DLNA client.
Step 102:DLNA server notice DLNA client is opened and displaying video, and the address of described video is the URL of http protocol, the IP port containing http server in URL and BHD file address information;
After step 103:DLNA client is notified, the player of DLNA client sends BHD file request to http server;
After step 104:HTTP server receives request, find corresponding BHD file;
Format converting module in step 105:HTTP server reads and resolves described BHD file;
Step 106: described BHD file transform is MP4 file by described format converting module, generates MP4 formatted file head and video data district offset relationship in internal memory;
Described BHD file, be further, the index of described BHD file is made up of one-level index and secondary index, containing one-level index in BHD file header, the content of one-level index is each secondary index positional information hereof, the secondary index of BHD file is distributed in video data district, and whether the content of each secondary index is document location, size of data, the timestamp of concrete every one-frame video data of its correspondence and is key frame information.
Described MP4 file, is further, and the index of MP4 file only has one-level index, and in MP4 file header, whether its one-level index contains document location, size of data, the timestamp of all video datas in file and be key frame information.
As shown in Figure 2, method BHD file format being converted to MP4 file format is as follows:
Described format converting module reads BHD file header, resolves one-level index, finds the position of each secondary index;
Whether described format converting module reads and resolves each secondary index, obtain the document location of each frame frequency data, size of data, timestamp and be key frame information;
According to document location, size of data, the timestamp of every one-frame video data with whether be key frame information, according to the form of MP4 file header, composition MP4 file header;
The video data district of BHD file, directly as the video data district of MP4 file.
BHD file and the difference of MP4 file are that file header form is different.But video data district is the same.Therefore, can according to BHD file, generate MP4 file header, video data need not be changed, and this process operand is minimum.
Step 107:HTTP server sends MP4 formatted file head and video data district to the player of DLNA client;
After the player of step 108:DLNA client receives MP4 formatted file head and video data district, displaying video.Displaying video adopts prior art, is not specifically limited here.
Embodiment 2:
On the basis of embodiment 1, the present embodiment is Application Example.
Scene: certain user has film " terminator 5.bhd " on its PC, ites is desirable to watch this film on its handset.(http server address is wherein 192.168.0.1 to the DLNA server its PC being provided with in the application, port numbers 8812), its mobile phone is provided with DLNA client (as KXCast software, a kind of general DLNA client player).Concrete steps are as follows:
Step 201: user opens the DLNA server on PC and the DLNA client on mobile phone.
DLNA client in step 201.1:DLNA server automatic-search current local area network, and show DLNA client (simultaneously there are other DLNA clients in possible network, mobile phone, intelligent television etc. as other people) used.
Step 201.2: user selects the DLNA client on the mobile phone of oneself on DLNA server.
Step 202: user selects to play local film " terminator 5.bhd " on DLNA server.
Step 202.1:DLNA server sends " opening " instruction, containing, for example lower URL in its instruction to DLNA client:http: // 192.168.0.1:8812/ terminator 5.bhd.DLNA client returns acknowledge message.
Step 202.2:DLNA server sends " broadcasting " instruction to DLNA client.DLNA client returns acknowledge message.
Step 203:DLNA client is that the http server (http server namely in DLNA server) of " 192.168.0.1:8812 " sends HTTP request to address, and containing URI in its HTTP request agreement is " terminator 5.bhd ".
After step 204:HTTP server receives request, analysis request agreement, learns that requested file is for " terminator 5.bhd ".
Step 205:HTTP server judges that file type is BHD file, automatically loads " format converting module ", and is read by " format converting module " and resolved " terminator 5.bhd ";
Step 206: " terminator 5.bhd " is converted to MP4 file by format converting module, detailed process is as follows:
" terminator 5.bhd " file structure is file header (size 12836 byte) data field (size 1822863276 byte)
Step 206.1: format converting module reads and resolves " terminator 5.bhd " file header, from in the one-level index file header, obtain the information (if the 10th secondary index position is hereof 20480042 bytes, size is 3028 bytes) such as all secondary indexs position hereof, size;
Step 206.2: format converting module reads successively and resolves all secondary indexs, obtain the document location of every one-frame video data, size of data, timestamp and whether be that key frame information is (as the 1047th frame, position is 32007870 bytes, size 4037 byte, timestamp 40228 milliseconds, non-key frame);
Step 206.3: according to document location, size of data, the timestamp of every one-frame video data with whether be key frame information, according to the form of MP4 file header, composition MP4 file header (size 2044576 byte).Because MP4 file is larger than former BHD file header, all video datas all create identical skew in file position, MP4 file video data district, all modify with this and increase identical skew (as the 1047th frame in the position of the every frame video data recorded in MP4 file header, after amendment, position is 32007870+2044576-12836 byte, other Information invariabilities);
The video data district of step 206.4:BHD file, directly as the video data district (size is still 1822863276 bytes) of MP4 file.
Step 207:HTTP server returns http response to DLNA client, containing, for example lower content in its response protocol:
Data type is MP4 video format (Contenttype:video/mp4).
Data length is the file size of the MP4 file after conversion.
Data are the MP4 file (MP4 file header obtains from the internal memory of format converting module, and video data district reads according to side-play amount in former " terminator 5.bhd " file) after conversion.
After the player of step 208:DLNA client receives MP4 formatted file head and video data district, start displaying video.
Compared with prior art, the method sharing broadcasting BHD file based on DLNA of the present invention, reaches following effect:
1) the application is by DLNA agreement and http server, is converted to MP4 file, achieves the broadcasting of ordinary playing device to BHD file by virtual for BHD file;
2) BHD file and the difference of MP4 file are that file header form is different, but video data district is the same.According to BHD file generated MP4 file header, video data need not be changed, and this process operand is minimum additionally need not take disk storage space;
3) ordinary playing device is to server request BHD file, but actual what receive is MP4 file.Realize playing possibility;
4) use DLNA agreement, its concrete control flow is all completed by DLNA server and DLNA client inside.User only needs to specify BHD file to be played, need not complex operations, and simplify the operation flow process.
Above-mentioned explanation illustrate and describes some preferred embodiments of the present invention, but as previously mentioned, be to be understood that the present invention is not limited to the form disclosed by this paper, should not regard the eliminating to other embodiments as, and can be used for other combinations various, amendment and environment, and can in invention contemplated scope described herein, changed by the technology of above-mentioned instruction or association area or knowledge.And the change that those skilled in the art carry out and change do not depart from the spirit and scope of the present invention, then all should in the protection range of claims of the present invention.