CN106131563A - The method and system of hardware decoding H264 video flowing are carried out based on DXVA - Google Patents
The method and system of hardware decoding H264 video flowing are carried out based on DXVA Download PDFInfo
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- CN106131563A CN106131563A CN201610605573.6A CN201610605573A CN106131563A CN 106131563 A CN106131563 A CN 106131563A CN 201610605573 A CN201610605573 A CN 201610605573A CN 106131563 A CN106131563 A CN 106131563A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/44—Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
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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
- H04N21/8166—Monomedia components thereof involving executable data, e.g. software
- H04N21/8193—Monomedia components thereof involving executable data, e.g. software dedicated tools, e.g. video decoder software or IPMP tool
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- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
The invention discloses a kind of method and system carrying out hardware decoding H264 video flowing based on DXVA, relate to the decoding field of the video flowing of H264 form.Steps of the method are: create DXVA function access interface by Multimedia Programming interface；Video decoding service interface is created by DXVA function access interface；Obtain all of hardware decoding rank in DXVA hardware decoder by video decoding service interface, obtain the other optimum hardware decoding parametric of each decoder stage respectively；Call video decoding service interface respectively and create decoding video output interface and hardware decoding interface；Optimum hardware decoding parametric, decoding video output interface are associated with FFMPEG with hardware decoding interface；By FFMPEG, the video flowing needing decoding is decoded and shows.The present invention can carry out the hardware decoding of the 1080p high definition video steaming of 50 multichannels simultaneously, and decoding speed is very fast, and work efficiency is higher.
Description
Technical field
The present invention relates to the decoding field of the video flowing of H264 form, be specifically related to a kind of based on DXVA (DirectX
Video Acceleration, vision hardware accelerate) carry out hardware decoding H264 (compression of digital video form) video flowing side
Method and system.
Background technology
Along with the development of network, increasing user likes watching in network direct broadcasting platform live, and therefore network is straight
Broadcasting platform and be widely used among society, the live content of network direct broadcasting platform is more and more diversified.
In order to ensure the Health Communication of the network information, stop the outflow of bad live content, need network direct broadcasting platform
Live content is monitored, and needs to be decoded live content before monitoring.Existing live to network direct broadcasting platform
Content is typically encoded by H264, and the method that the video flowing of H264 form is decoded is generally software decode, software solution
There is following defect in code method:
During traditional H264 software decode, more cpu resource can be taken, and then make decoding speed relatively slow, enter simultaneously
The video flowing of row decoding is less；And along with the raising of video display format, the video of the video flowing in network direct broadcasting platform shows
Showing the more and more higher Qinghua of form, (high definition video steaming, resolution reaches the video of more than 720p to HD video flowing to use H264 software
Stream) decoding the slowest.
Summary of the invention
For defect present in prior art, present invention solves the technical problem that for: provide one to carry out based on DXVA
The method and system of hardware decoding H264 video flowing.The present invention is very fast to the decoding speed of high definition video steaming, and work efficiency is higher.
For reaching object above, the method carrying out hardware decoding H264 video flowing based on DXVA that the present invention provides, including
Following steps:
S1: create DXVA function access interface by Multimedia Programming interface；
S2: create video decoding service interface by DXVA function access interface；
S3: obtain all of hardware decoding rank in DXVA hardware decoder by video decoding service interface, obtain respectively
Take the other optimum hardware decoding parametric of each decoder stage；
S4: call video decoding service interface and be respectively created decoding video output interface and hardware decoding interface；
S5: by FFMPEG respectively with the optimum hardware decoding parametric in S3, the decoding video output interface in S4 and hardware
Decoding interface associates；
S6: the video flowing needing decoding is decoded and shows by the FFMPEG after association.
What the present invention provided realizes the system carrying out hardware decoding H264 video flowing based on DXVA of said method, including
DXVA function access interface creation module, video decoding service interface creation module, optimum hardware decoding parametric acquisition module, solution
Code video output interface creation module, hardware decoding interface creation module, FFMPEG relating module and decoding display module；
DXVA function access interface creation module is used for: create DXVA function access interface by Multimedia Programming interface；
Video decoding service interface creation module is used for: creates video decoding service by DXVA function access interface and connects
Mouthful；
Optimum hardware decoding parametric acquisition module is used for: obtained in DXVA hardware decoder by video decoding service interface
All of hardware decoding rank, obtains the other optimum hardware decoding parametric of each decoder stage respectively；
Decoding video output interface creation module is used for: calls video decoding service interface establishment decoding video frequency output and connects
Mouthful；
Hardware decoding interface creation module is used for: calls video decoding service interface and creates hardware decoding interface；
FFMPEG relating module is used for: by FFMPEG respectively with optimum hardware decoding parametric, decoding video output interface and
Hardware decoding interface associates；
Decoding display module is used for: by FFMPEG, the video flowing needing decoding is decoded and is shown.
Compared with prior art, it is an advantage of the current invention that:
Compared with software decode of the prior art, the present invention is by DXVA hardware decoder and FFMPEG (Fast
Forward Mpeg, multimedia video handling implement) combine, thus based on DXVA, the video flowing of network direct broadcasting platform is carried out firmly
Part decodes.Draw after tested, when the method and system of the present invention uses, utilize the video accelerating interface of Windows operating system,
Under the such computer of I5-4440 of Intel, it is possible to carry out the hardware decoding of the 1080p high definition video steaming of 50 multichannels simultaneously,
Decoding speed is very fast, and work efficiency is higher, and then is capable of the configuration by multiple stage computer, under network direct broadcasting platform
All net cast contents are monitored.
Accompanying drawing explanation
Fig. 1 is the flow chart of the method carrying out hardware decoding H264 video flowing based on DXVA in the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
The method carrying out hardware decoding H264 video flowing based on DXVA shown in Figure 1, in the embodiment of the present invention, including
Following steps:
S1: create DXVA function access interface by Multimedia Programming interface and initialize；Multimedia Programming interface
(version of DirectX, it comprises 2D or the DLL of 3D rendering, audio interface and external to use Direct3D9
The input/output interface of equipment)；On this basis, the idiographic flow of S1 is:
S101: created by DXVA2CreateDirect3DDeviceManager9 (access interface establishment function)
IDirect3DDeviceManager9 interface (i.e. DXVA function access interface).
S102: by the establishment function (CreateDevice) of IDirect3D9 interface (ingress interface of Direct3D9)
Create decoding image display interface: IDirect3DDevice9 interface, this interface be in Direct3D9 of paramount importance one connect
Mouthful, it is provided that the functions such as establishing resource, condition managing, memory management and display drafting.
S103: IDirect3DDeviceManager9 interface is initialized by IDirect3DDevice9 interface.
S2: creating video decoding service interface by DXVA function access interface, idiographic flow is:
S201: call the replacement function (ResetDevice) of IDirect3DDeviceManager9 interface is right
IDirect3DDeviceManager9 interface resets；
S202: call the equipment handle acquiring function of IDirect3DDeviceManager9 interface
(OpenDeviceHandle), an equipment handle deviceHandle is obtained；
S203: the Video service calling IDirect3DDeviceManager9 interface obtains function
(GetVideoService), created by the equipment handle deviceHandle in S202
IDirectXVideoDecoderService interface (video decoding service interface).
S3: obtain all of hardware decoding rank in DXVA hardware decoder by video decoding service interface, obtain respectively
Taking the other optimum hardware decoding parametric of each decoder stage, idiographic flow is:
S301: the hardware decoding rank calling IDirectXVideoDecoderService interface obtains function
(GetDecoderDeviceGuids) all of hardware decoding rank in DXVA hardware decoder, is obtained.
S302: call hardware decoding parametric and obtain function (GetDecoderConfigurations), obtain each decoding
The DXVA2_ConfigPictureDecode (optimum hardware decoding parametric) of rank, uses for process below.
S4: call the surface creation function (CreateSurface) of video decoding service interface, creates decoding video frequency output
Interface (IDirect3DSurface9 interface), decoded video image content is stored in this interface.Call video decoding clothes
The video decoding of business interface creates function (CreateVideoDecoder) and creates hardware decoding interface
(IDirectXVideoDecoder interface) also initializes.
S5: by FFMPEG respectively with the optimum hardware decoding parametric in S3, the decoding video output interface in S4 and hardware
Decoding interface associates, and idiographic flow is:
S501: initialize FFMPEG, forms DXVA with DXVA association and is connected scene (dxva_context).
S502: respectively by the decoding in hardware decoding parametric DXVA2_ConfigPictureDecode and S4 in S3
Video output interface IDirect3DSurface9 and hardware decoding interface IDirectXVideoDecoder, assignment to dxva_
Corresponding field in context.
S503: by the hardware of the structured data (AVCodecContext) of dxva_context Yu FFMPEG after assignment
Decoding Connecting quantity (hwaccel_context) association, thus set up the DXVA connection with FFMPEG.
AVCodecContext in S503 is the important decoding condition of the decoding functions of FFMPEG, under default situations, solves
Code function is by software decode；So FFMPEG and DXVA cooperation is carried out hardware decoding, then it is right to need
Hardware decoding Connecting quantity (hwaccel_context) of AVCodecContext is arranged accordingly.hwaccel_
Context is the pointer of a dxva_context scene, and it includes 2 call back function get_format and get_buffer2,
Get_format is for returning the type of pixel of hardware decoding, and get_buffer2 is for providing decoded image defeated to DXVA
Go out (i.e. corresponding with decoding video output interface).
S6: by the decoding functions (avcodec_decode_video2) of FFMPEG, to need decoding video flowing (depending on
Frequency stream obtains in advance according to the network address) it is decoded；Decoded image can be returned by decoding functions；The value returned
It it is a pointer comprising IDirect3DSurface9.Show that interface shows decoded figure by the decoding image in S102
Picture.
What the embodiment of the present invention provided realizes the system carrying out hardware decoding H264 video flowing based on DXVA of said method,
Mould is obtained including DXVA function access interface creation module, video decoding service interface creation module, optimum hardware decoding parametric
Block, decoding video output interface creation module, hardware decoding interface creation module, FFMPEG relating module, decoding display module
With video flowing acquisition module.
DXVA function access interface creation module is used for: create DXVA merit by Multimedia Programming interface (Direct3D9)
Can access interface；Specific works flow process is: create function creation DXVA function access interface by access interface；Pass through
The ingress interface of Direct3D9 creates decoding image display interface；By decoding image display interface, DXVA function is connect
Mouth initializes.
Video decoding service interface creation module is used for: creates video decoding service by DXVA function access interface and connects
Mouthful；Specific works flow process is: reset DXVA function access interface；The equipment handle calling DXVA function access interface obtains
Take function, obtain an equipment handle；The Video service calling DXVA function access interface obtains function, by described equipment sentence
Handle creates video decoding service interface.
Optimum hardware decoding parametric acquisition module is used for: obtained in DXVA hardware decoder by video decoding service interface
All of hardware decoding rank, obtains the other optimum hardware decoding parametric of each decoder stage respectively；Specific works flow process is: call
The hardware decoding rank of video decoding service interface obtains function, obtains all of hardware decoder stage in DXVA hardware decoder
Not；Call hardware decoding parametric and obtain function, obtain the other optimum hardware decoding parametric of each decoder stage.
Decoding video output interface creation module is used for: call the surface creation function of video decoding service interface, creates
Decoding video output interface.
Hardware decoding interface creation module is used for: the video decoding calling video decoding service interface creates function, creates
Hardware decoding interface.
FFMPEG relating module is used for: by FFMPEG respectively with optimum hardware decoding parametric, decoding video output interface and
Hardware decoding interface associates；Specific works flow process is: initialize FFMPEG, forms DXVA with DXVA association and is connected field
Scape；Respectively by optimum hardware decoding parametric, decoding video output interface and hardware decoding interface, assignment to DXVA connects in scene
Corresponding field；DXVA after assignment connects scene associate with the hardware decoding Connecting quantity of the structured data of FFMPEG.
Video flowing acquisition module is used for: obtaining according to the network address needs the video flowing of decoding.
Decoding display module is used for: by FFMPEG, the video flowing needing decoding is decoded and is shown, specific works
Flow process is: be decoded, by the decoding functions of FFMPEG, the video flowing needing decoding；Shown by described decoding image and connect
Mouth shows decoded image.
The present invention is not limited to above-mentioned embodiment, for those skilled in the art, without departing from
On the premise of the principle of the invention, it is also possible to make some improvements and modifications, these improvements and modifications are also considered as the protection of the present invention
Within the scope of.The content not being described in detail in this specification belongs to prior art known to professional and technical personnel in the field.
Claims (10)
1. the method carrying out hardware decoding H264 video flowing based on DXVA, it is characterised in that the method comprises the following steps:
S1: create DXVA function access interface by Multimedia Programming interface；
S2: create video decoding service interface by DXVA function access interface；
S3: obtain all of hardware decoding rank in DXVA hardware decoder by video decoding service interface, obtain every respectively
The other optimum hardware decoding parametric of individual decoder stage；
S4: call video decoding service interface and be respectively created decoding video output interface and hardware decoding interface；
S5: FFMPEG is decoded with the optimum hardware decoding parametric in S3, the decoding video output interface in S4 and hardware respectively
Interface conjunctionn；
S6: the video flowing needing decoding is decoded and shows by the FFMPEG after association.
2. the method carrying out hardware decoding H264 video flowing based on DXVA as claimed in claim 1, it is characterised in that: institute in S1
State Multimedia Programming interface and use Direct3D9；On this basis, the idiographic flow of S1 is:
S101: create function creation DXVA function access interface by access interface；
S102: create decoding image display interface by the ingress interface of Direct3D9；
S103: DXVA function access interface is initialized by decoding image display interface；
The idiographic flow of S2 is:
S201: DXVA function access interface is reset；
S202: call the equipment handle acquiring function of DXVA function access interface, obtains an equipment handle；
S203: the Video service calling DXVA function access interface obtains function, creates video by described equipment handle and decodes
Service interface.
3. the method carrying out hardware decoding H264 video flowing based on DXVA as claimed in claim 2, it is characterised in that the tool of S3
Body flow process is:
S301: the hardware decoding rank calling video decoding service interface obtains function, obtains in DXVA hardware decoder all
Hardware decoding rank；
S302: call hardware decoding parametric and obtain function, obtains the other optimum hardware decoding parametric of each decoder stage；
The idiographic flow of S4 is: call the surface creation function of video decoding service interface, creates decoding video output interface；Adjust
Decode with the video of video decoding service interface and create function, create hardware decoding interface.
4. the method carrying out hardware decoding H264 video flowing based on DXVA as claimed in claim 3, it is characterised in that the tool of S5
Body flow process is:
S501: initialize FFMPEG, forms DXVA with DXVA association and is connected scene；
S502: respectively by the optimum hardware decoding parametric in S301 and the decoding video output interface in S4 and hardware decoding
Interface, assignment to DXVA connects the corresponding field in scene；
S503: the DXVA after assignment is connected scene and associates with the hardware decoding Connecting quantity of the structured data of FFMPEG；
The idiographic flow of S6 is: be decoded, by the decoding functions of FFMPEG, the video flowing needing decoding；By in S102
Described decoding image display interface shows decoded image.
5. the method carrying out hardware decoding H264 video flowing based on DXVA as described in any one of Claims 1-4, its feature exists
In: before S6 further comprising the steps of: according to the network address obtain need decoding video flowing.
6. one kind realize method described in any one of claim 1 to 5 based on DXVA carry out hardware decoding H264 video flowing be
System, it is characterised in that: this system includes DXVA function access interface creation module, video decoding service interface creation module,
Excellent hardware decoding parametric acquisition module, decoding video output interface creation module, hardware decoding interface creation module, FFMPEG close
Gang mould block and decoding display module；
DXVA function access interface creation module is used for: create DXVA function access interface by Multimedia Programming interface；
Video decoding service interface creation module is used for: create video decoding service interface by DXVA function access interface；
Optimum hardware decoding parametric acquisition module is used for: obtain in DXVA hardware decoder all by video decoding service interface
Hardware decoding rank, obtain the other optimum hardware decoding parametric of each decoder stage respectively；
Decoding video output interface creation module is used for: calls video decoding service interface and creates decoding video output interface；
Hardware decoding interface creation module is used for: calls video decoding service interface and creates hardware decoding interface；
FFMPEG relating module is used for: by FFMPEG respectively with optimum hardware decoding parametric, decoding video output interface and hardware
Decoding interface associates；
Decoding display module is used for: by FFMPEG, the video flowing needing decoding is decoded and is shown.
7. the system of hardware decoding H264 video flowing is carried out as claimed in claim 6 based on DXVA, it is characterised in that: described
Multimedia Programming interface in DXVA function access interface creation module uses Direct3D9；
On this basis, the specific works flow process of DXVA function access interface creation module is: create function by access interface
Create DXVA function access interface；Decoding image display interface is created by the ingress interface of Direct3D9；By decoding image
DXVA function access interface is initialized by display interface；
The specific works flow process of described video decoding service interface creation module is: reset DXVA function access interface；
Call the equipment handle acquiring function of DXVA function access interface, obtain an equipment handle；Call DXVA function access interface
Video service obtain function, by described equipment handle create video decoding service interface.
8. carry out as claimed in claim 7 the system of hardware decoding H264 video flowing based on DXVA, it is characterised in that described
The specific works flow process of excellent hardware decoding parametric acquisition module is: the hardware decoding rank calling video decoding service interface obtains
Function, obtains all of hardware decoding rank in DXVA hardware decoder；Call hardware decoding parametric and obtain function, obtain each
The other optimum hardware decoding parametric of decoder stage；
The specific works flow process of described decoding video output interface creation module is: call the surface wound of video decoding service interface
Build function, create decoding video output interface；
The specific works flow process of described hardware decoding interface creation module is: call the video decoding wound of video decoding service interface
Build function, create hardware decoding interface.
9. carry out the system of hardware decoding H264 video flowing as claimed in claim 8 based on DXVA, it is characterised in that described
The specific works flow process of FFMPEG relating module is: initialize FFMPEG, forms DXVA with DXVA association and is connected scene；
Respectively by optimum hardware decoding parametric, decoding video output interface and hardware decoding interface, assignment to DXVA connects in scene
Corresponding field；DXVA after assignment connects scene associate with the hardware decoding Connecting quantity of the structured data of FFMPEG；
The specific works flow process of described decoding display module is: flow to, by the decoding functions of FFMPEG, the video needing decoding
Row decoding；Decoded image is shown by described decoding image display interface.
10. the system carrying out hardware decoding H264 video flowing based on DXVA as described in any one of claim 6 to 9, its feature
Being: this system also includes video flowing acquisition module, it is used for: obtaining according to the network address needs the video flowing of decoding.
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| CN113727115A (en) * | 2021-07-21 | 2021-11-30 | 天津津航计算技术研究所 | Efficient transcoding video decoding method |
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Application publication date: 20161116 |