CN109831693A - A kind of method that video frame information data reported and determined data underflow - Google Patents
A kind of method that video frame information data reported and determined data underflow Download PDFInfo
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Abstract
The present invention includes a kind of video frame information data reporting method, wherein is applied in IPTV set top box system, IPTV set top box system is for playing video, and IPTV set top box system includes inner nuclear layer and player layer, and player layer is located on inner nuclear layer；Method is the following steps are included: step A1, inner nuclear layer obtain the corresponding data flow of video by decoding；Step A2, player layer obtain data flow by I/O channel management function.The beneficial effects of the present invention are: data flow is uploaded to by player layer by inner nuclear layer, player layer obtains video flowing by I/O channel management function, to improve the efficiency and the property completed that video reports.
Description
Technical field
The present invention relates to fields of communication technology more particularly to a kind of video frame information data to report and determine data underflow
Method.
Background technique
IPTV (Interactive Internet TV) is a kind of using broadband networks, collects the technologies such as internet, multimedia, communication in one
Body provides the brand-new technology of a variety of interactive services including DTV to domestic consumer.And with internet
The development of technology, more and more people pay close attention to network direct broadcasting, therefore direct broadcast time-shift is also concerned.By network signal, online
TV reception, occasion and news etc., allow people to have wide and freely select space.Realize that iptv set-top box exists
The inner nuclear layer of chip bottom is decoded video to obtain data flow and be uploaded to player layer, and player layer obtains
Video flowing is handled also more important.
Summary of the invention
For the above-mentioned problems in the prior art, one kind is now provided it is intended to upload to data flow by inner nuclear layer and broadcast
Device layer is put, player layer obtains video flowing by I/O channel management function, to improve the efficiency and the property completed that video reports
Video frame information data reporting method.
Specific technical solution is as follows:
A kind of video frame information data reporting method, wherein be applied in IPTV set top box system, IPTV set top box system
For playing video, IPTV set top box system includes inner nuclear layer and player layer, and player layer is located on inner nuclear layer；
Method the following steps are included:
Step A1, inner nuclear layer obtain the corresponding data flow of video by decoding；
Step A2, player layer obtain data flow by I/O channel management function.
Preferably, video frame information data reporting method, wherein
IPTV set top box system includes the first buffer storage, and the first buffer storage connects with inner nuclear layer and player layer respectively
It connects, data flow is saved in the first buffer storage by inner nuclear layer, and player layer is filled by I/O channel management function from the first caching
The continuous video frame obtained in data flow is set, and video frame is played out.
Preferably, video frame information data reporting method, wherein inner nuclear layer is decoded to video, and records data
Erroneous video frame in stream then abandons erroneous video frame.
Preferably, video frame information data reporting method, wherein player layer is when playing out video frame, judgement
Whether video frame there is data underflow.
Preferably, video frame information data reporting method, wherein IPTV set top box system includes middleware layer, middleware
Layer is located on player layer；
Player layer merges the data underflow information that the data flow obtained from inner nuclear layer and processing data flow generate,
To obtain pooling information, and middleware layer is sent by pooling information.
Preferably, video frame information data reporting method, wherein player layer will call the pointer of function to be sent to centre
Part layer, middleware layer call pooling information according to pointer.
Preferably, video frame information data reporting method, wherein IPTV set top box system includes the first buffer storage, the
One buffer storage is connect with inner nuclear layer；
First buffer storage includes the first cache unit and the second cache unit；
Hardware decoder is provided in inner nuclear layer；
Step A1 is specifically included:
Step A11, hardware decoder obtain the corresponding data flow of video by decoding, and the mistake view in record data stream
Frequency frame；
Step A12, inner nuclear layer abandon erroneous video frame, and the normal video frame storage in data flow is single to the first caching
In member；
Step A13, inner nuclear layer store partial data stream to current from the first cache unit every preset period of time
In second cache unit.
Preferably, video frame information data reporting method, wherein
IPTV set top box system includes the first buffer storage, and the first buffer storage connects with inner nuclear layer and player layer respectively
It connects；
IPTV set top box system include the second buffer storage, the second buffer storage respectively with the first buffer storage and player
Layer connection, the second buffer storage reads the data frame of the first buffer storage in real time, and the data frame after reading is stored to second
In buffer storage；
Different volume thresholds is arranged according to the resolution ratio of video for second buffer storage；
Judge data flow whether there is data underflow specifically includes the following steps:
Step B1, player layer is by the size of the current partial data stream in the second buffer storage and corresponding volume threshold
Value is compared；
When the size of current partial data stream is less than volume threshold, step B2 is then executed；
When the size of current partial data stream is greater than or equal to volume threshold, the every of current partial data stream is determined
A video frame is not data underflow, then executes step B3；
Step B2 judges whether increase new video frame after the second buffer storage read data frame；
If so, determining that each video frame of current partial data stream does not occur data underflow；
If it is not, determining that data underflow occurs in the data frame read；
Step B3 sets current partial data stream for next partial data stream, step B1 is then returned to, until complete
The quantity of the video frame of pairs of all partial data streams and corresponding volume threshold are compared.
Preferably, video frame information data reporting method, wherein
Middleware layer and obtains in pooling information Caton time every the pooling information of preset period of time calling section
Number, to be handled to obtain the Caton time according to Caton number.
Preferably, video frame information data reporting method, wherein
Obtain the Caton time and the Caton time is compared with default Caton time threshold specifically includes the following steps:
Step C1, middleware layer is by calling the pointer of function to obtain in preset period of time every preset period of time
Partial pooling information；
Step C2, middleware layer handles the data underflow information of the pooling information of part, to obtain preset time
The Caton number of data flow in period；
Step C3, middleware layer are handled to obtain the Caton time according to Caton number；
Step C4, judges whether the Caton time is greater than default Caton time threshold；
If so, Caton data are denoted as to the pooling information in the preset period of time for being greater than default Caton time threshold, with
Step C5 is executed afterwards；
If it is not, executing step C5；
Step C5, return step C3, the part number in each preset period of time of the middleware layer to pooling information
All judged according to the Caton time of stream.
Above-mentioned technical proposal has the following advantages that or the utility model has the advantages that data flow uploaded to player layer by inner nuclear layer,
Player layer obtains video flowing by I/O channel management function, to improve the efficiency and the property completed that video reports.
Detailed description of the invention
With reference to appended attached drawing, more fully to describe the embodiment of the present invention.However, appended attached drawing be merely to illustrate and
It illustrates, and is not meant to limit the scope of the invention.
Fig. 1 is the flow chart of video frame information data reporting method embodiment of the present invention；
Fig. 2 is the flow chart of the step A1 of video frame information data reporting method embodiment of the present invention；
Fig. 3 is the flow chart for judging data underflow of video frame information data reporting method embodiment of the present invention；
Fig. 4 is the flow chart of the calculating Caton number of video frame information data reporting method embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art without creative labor it is obtained it is all its
His embodiment, shall fall within the protection scope of the present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
The present invention will be further explained below with reference to the attached drawings and specific examples, but not as the limitation of the invention.
The present invention includes a kind of video frame information data reporting method, wherein is applied in IPTV set top box system, IPTV
Set-top-box system is for playing video, and IPTV set top box system includes inner nuclear layer and player layer, and player layer is located at inner nuclear layer
On；
As shown in Figure 1, method the following steps are included:
Step A1, inner nuclear layer obtain the corresponding data flow of video by decoding；
Step A2, player layer obtain data flow by I/O channel management function.
In the above-described embodiments, inner nuclear layer obtains the corresponding data flow of video by decoding, and data flow is uploaded to and is broadcast
Device layer is put, player layer obtains video flowing by I/O channel management function, and handles video flowing, to improve view
The efficiency that frequency reports and the property completed.
Further, as preferred embodiment, inner nuclear layer obtains the corresponding data flow of video, above-mentioned number by decoding
It include video data parameter: video code rate (bitrate), video frame rate (videoframerate), video resolution according to stream
(resolution), coding mode (codectype) and coding parameter.
Wherein coding parameter includes:
1, every frame video frame type (I, P, B... frame)；
2, frame level bit size；
3, frame level QP (Quantization Parameter, the coded quantization coefficient of macro block) triple (maximum value, minimum
Value, average value)；
4, maximum reference frame number；
5, frame level MV (motionvector, motion vector) triple (maximum value, minimum value, average value)；
6, frame level skip and non-skip mode ratio (I frame is 0)；
Wherein, it should be noted that QP is the coded quantization coefficient of the macro block of B frame, P frame and I frame；
MV is the motion vector of B frame and P frame, and judges forward and backward respectively by positive and negative values.
Further, in the above-described embodiments, IPTV set top box system includes the first buffer storage, the first buffer storage point
It is not connect with inner nuclear layer and player layer, data flow is saved in the first buffer storage by inner nuclear layer, and player layer is logical by I/O
Road management function plays out video frame from the continuous video frame obtained in data flow in the first buffer storage.
Further, in the above-described embodiments, inner nuclear layer is decoded to video, and the mistake view in record data stream
Frequency frame then abandons erroneous video frame.
Further, in the above-described embodiments, player layer judges whether video frame goes out when playing out video frame
Existing data underflow.
Further, in the above-described embodiments, IPTV set top box system includes middleware layer, and middleware layer is located at player
On layer；
Player layer merges the data underflow information that the data flow obtained from inner nuclear layer and processing data flow generate,
To obtain pooling information, and middleware layer is sent by pooling information.
In the above-described embodiments, player layer obtains data flow from inner nuclear layer, includes erroneous video frame in above-mentioned data flow
Recording parameters, in player layered data processing stream, while handling the recording parameters for the erroneous video frame that data flow includes.
Further, in the above-described embodiments, the pointer for calling function is sent middleware layer, middleware by player layer
Layer calls pooling information according to pointer.
Further, in the above-described embodiments, IPTV set top box system include the first buffer storage, the first buffer storage with
Inner nuclear layer connection；
First buffer storage includes the first cache unit and the second cache unit；
Hardware decoder is provided in inner nuclear layer；
Step A1 is specifically included:
Step A11, hardware decoder obtain the corresponding data flow of video by decoding, and the mistake view in record data stream
Frequency frame；
Step A12, inner nuclear layer abandon erroneous video frame, and the normal video frame storage in data flow is single to the first caching
In member；
Step A13, inner nuclear layer store partial data stream to current from the first cache unit every preset period of time
In second cache unit.
Further, it as preferred embodiment, in inner nuclear layer, is decoded first in the chip bottom hardware of inner nuclear layer
Device obtains the corresponding data flow of video by decoding, includes video data parameter in above-mentioned data flow, according to each video frame
Coding parameter judges whether corresponding video frame is erroneous video frame, and the erroneous video frame in record data stream, subsequent kernel
Layer abandons erroneous video frame, and the normal video frame in data flow is stored to the first cache unit and (is denoted as frameinfo_
Buffer_in in), inner nuclear layer can all read partial data stream each second from the first cache unit, and store to current second
In cache unit (being denoted as frameinfo_buffer_out).
Further, data are transmitted by the method for calling of I/O channel management function from inner nuclear layer to player layer:
In inner nuclear layer, using the method for calling of unlocked_ioctl () (I/O channel management function).Institute specific as follows
Show:
Pointer parameter, cmd (command, command prompt) transmitting are transmitted using arg in above-mentioned I/O channel management function
Order.
Each cmd is made of the data of 32bits, is specifically divided into device model, device type, data bit, direction position.
Wherein the 0-7bit of cmd is used for write device model；
8-15bit is used for write device type；
16-29bit is for being written size of data；
30-31bit is for being written data transfer direction.
Wherein, device model is exactly the secondary device operation number of concrete operations, can at most support 256.
Device type is exactly the Master device operation number of concrete operations, and different cmd types can be different types of to distinguish
Particular device.
Size of data indicates the size of data operated every time, is up to 16k.
Data transfer direction mainly indicates the operation to equipment, reads equipment, write device, read-write equipment.
Shown in specific as follows:
Wherein, type is type, and nr is serial number, and size is size of data.
_ IOC_NONE: no data transmission.
_ IOC_READ: data are read from device drives.
_ IOC_WRITE: data are written toward device drives.
_ IOC_READ | _ IOC_WRITE: bidirectional data transfers.
In user's space, the IOCTL (I/O channel management function) of user's space calls as follows: ioctl (int fd,
int cmd,(char*)arg)；Wherein fd is that socket () system calls returned parameter, and cmd parameter can be/
Any one in usr/include/linux/sockios.h header file.
Further, as preferred embodiment, player layer passes through the calling of I/O channel management function (ioctl)
Mode obtains the data flow in inner nuclear layer, handles on buffer storage data stream, to obtain continuous video frame, and it is right
Video frame carries out relevant treatment.
Further, as preferred embodiment, the caching of each buffer storage can be determined by arranged below
State:
0 is used for normal data (i.e. 0--ok)；
1 for indicating overflow data (i.e. 1--overflow)；
2 for indicating underflow data (i.e. 2--underflow)；
3 for indicating wrong data (i.e. 3--decode error)；
Wherein in the case of a normal play, the data being arranged in buffer storage are 0.
Wherein data overflow includes following two kinds of situations:
The first, data decoding speed is much larger than the speed that data consume；
The second, middleware layer write-in data when in predetermined time period mistake always, and without eliminating data buffer storage.
Wherein data underflow includes following four kinds of situations:
The first, data underflow caused by Network Packet Loss；
The second, data underflow caused by network cutout；
Data underflow caused by third, network speed limit；
4th, video data flower screen filters, data underflow caused by data deficiencies.
It should be noted that player layer is when handling data flow, the recording parameters of the erroneous video frame handled, and will
Erroneous video frame is denoted as wrong data.
Further, in the above-described embodiments, the first different video frame thresholds is arranged according to the resolution ratio of video for video frame
Value；
As shown in figure 3, IPTV set top box system includes the first buffer storage in view of the above problems, in the above-described embodiments,
First buffer storage is connect with inner nuclear layer and player layer respectively；
IPTV set top box system include the second buffer storage, the second buffer storage respectively with the first buffer storage and player
Layer connection, the second buffer storage reads the data frame of the first buffer storage in real time, and the data frame after reading is stored to second
In buffer storage；
Different volume thresholds is arranged according to the resolution ratio of video for second buffer storage；
Judge data flow whether there is data underflow specifically includes the following steps:
Step B1, player layer is by the size of the current partial data stream in the second buffer storage and corresponding volume threshold
Value is compared；
When the size of current partial data stream is less than volume threshold, step B2 is then executed；
When the size of current partial data stream is greater than or equal to volume threshold, the every of current partial data stream is determined
A video frame is not data underflow, then executes step B3；
Step B2 judges whether increase new video frame after the second buffer storage read data frame；
If so, determining that each video frame of current partial data stream does not occur data underflow；
If it is not, determining that data underflow occurs in the data frame read；
Step B3 sets current partial data stream for next partial data stream, step B1 is then returned to, until complete
The quantity of the video frame of pairs of all partial data streams and corresponding volume threshold are compared.
Further, as preferred embodiment, to the current part in the second buffer storage of storing data stream
The size of data flow is determined, if underflow does not have data, can not just show the video frame in the second buffer storage, at this time
The size of partial data stream in the second buffer storage is less than the volume threshold of the second current buffer storage.
On the basis of the size of current partial data stream in the second current buffer storage is less than volume threshold,
The place for reading the video frame in the second current buffer storage adds read pointer, and above-mentioned read pointer is for judging the second caching dress
Whether new video frame is increased in setting, if i.e. reading data pointer is constant always without increasing video frame in the second buffer storage,
There is data underflow in the data frame so read at this time.
Further, in the above-described embodiments, middleware layer every preset period of time calling section pooling information, and
Caton number is obtained, in pooling information to be handled to obtain the Caton time according to Caton number.
Further, it as preferred embodiment, reports all treated data are per second once to middleware layer,
And player layer and middleware layer realize the data call of middleware layer using call back function.
One example of call back function is as follows:
{“opt”:”
update",data":{“data_type":"iptv","action_type":"frameinfo","iptv_
version":"3.0","play_url":"http://xxx.xx.xx.xx:80/test.m3u8","time_space":"
20160805164550-201608051645551","frame_rate":"25","freeze_count":"2","freeze_
time":"22","frame_info":"I(1024,21,108,70,23,80,55,0,0),B(512,21,110,72,25,
90,58,1,0),P(512,21,108,70,23,80,55,1,1),I(1024,21,108,70,23,80,55,0,0),P
(512,21,108,70,23,80,55,1,1),P(512,21,108,70,23,80,55,1,2)……"}
Further, in the above-described embodiments, obtain the Caton time and by Caton time and default Caton time threshold into
Row it is more specific the following steps are included:
Step C1, middleware layer is by calling the pointer of function to obtain in preset period of time every preset period of time
Partial pooling information；
Step C2, middleware layer handles the data underflow information of the pooling information of part, to obtain preset time
The Caton number of data flow in period；
Wherein, the video frame for data underflow occur is denoted as a Caton, number of the middleware layer to the pooling information of part
It is counted according to the video frame of the appearance data underflow in underflow information to obtain the Caton of the data flow in preset period of time
Number；
Step C3, middleware layer are handled to obtain the Caton time according to Caton number；
Step C4, judges whether the Caton time is greater than default Caton time threshold；
If so, Caton data are denoted as to the pooling information in the preset period of time for being greater than default Caton time threshold, with
Step C5 is executed afterwards；
If it is not, executing step C5；
Step C5, return step C3, the part number in each preset period of time of the middleware layer to pooling information
All judged according to the Caton time of stream.
Further, as preferred embodiment, when middleware layer is according to the reading of Caton number and each video frame
Between handled to obtain the Caton time；
Wherein, when preset period of time is 1 second, the reading of each video frame is calculated according to following formula for middleware layer
Take the time:
Pts=AV_TIME_BASE × PTS/PTS_FREQ； (1)
Wherein, pts is used to indicate the read access time of each video frame；
AV_TIME_BASE is used to indicate that preset period of time to be 1 second time of day；
PTS is used to indicate the video frame quantity of the data flow in preset period of time；
PTS_FREQ is for indicating concussion number；
It should be noted that the standard time clock of audio-video is 90KHZ, that is to say, that clock oscillation 90k times is 1s, i.e., above-mentioned
The value of PTS_FREQ in formula (1) is 90*1000；The value of AV_TIME_BASE is 10000.
Middleware layer obtains the Caton time according to following formula:
T=pts × n； (2)
Wherein, t is for indicating the Caton time；
N is for indicating Caton number.
In middleware layer, using the function pointer of the above-mentioned call back function related data per second for obtaining video frame information, and
And relevant treatment is carried out to the related data of video frame information, count the Caton frame number per second greater than 500ms.
Further, in the above-described embodiments, application layer obtains Caton number, and the matter of video is judged according to Caton number
Amount.
Further, as preferred embodiment, the Caton number of middleware layer statistics per second will do it unified calculation
And it is uploaded to application layer probe, final application layer probe can judge the fine or not problem of video quality according to Caton number.
The above is only preferred embodiments of the present invention, are not intended to limit the implementation manners and the protection scope of the present invention, right
For those skilled in the art, it should can appreciate that and all replace with being equal made by description of the invention and diagramatic content
It changes and obviously changes obtained scheme, should all be included within the scope of the present invention.
Claims (10)
1. a kind of video frame information data reporting method, which is characterized in that be applied in an IPTV set top box system, the IPTV
For set-top-box system for playing video, the IPTV set top box system includes inner nuclear layer and player layer, player layer position
On the inner nuclear layer；
It the described method comprises the following steps:
Step A1, the inner nuclear layer obtain the corresponding data flow of the video by decoding；
Step A2, the player layer obtain the data flow by I/O channel management function.
2. video frame information data reporting method as described in claim 1, which is characterized in that
The IPTV set top box system includes the first buffer storage, first buffer storage respectively with the inner nuclear layer and described
The data flow is saved in first buffer storage by the connection of player layer, the inner nuclear layer, and the player layer passes through
I/O channel management function obtains the continuous video frame in the data flow from first buffer storage, and by the view
Frequency frame plays out.
3. video frame information data reporting method as described in claim 1, which is characterized in that the inner nuclear layer is to the view
Frequency is decoded, and records the erroneous video frame in the data flow, then abandons the erroneous video frame.
4. video frame information data reporting method as claimed in claim 2, which is characterized in that the player layer will be will be described
When video frame plays out, judge whether the video frame data underflow occurs.
5. video frame information data reporting method as described in claim 1, which is characterized in that the IPTV set top box system packet
Middleware layer is included, the middleware layer is located on the player layer；
The data underflow information that the player layer generates the data flow obtained from the inner nuclear layer and the processing data flow
It merges, to obtain pooling information, and sends the middleware layer for the pooling information.
6. video frame information data reporting method as claimed in claim 5, which is characterized in that the player layer will call letter
Several pointers is sent to the middleware layer, and the middleware layer calls the pooling information according to the pointer.
7. video frame information data reporting method as claimed in claim 3, which is characterized in that
The IPTV set top box system includes the first buffer storage, and first buffer storage is connect with the inner nuclear layer；
First buffer storage includes the first cache unit and the second cache unit；
Hardware decoder is provided in the inner nuclear layer；
The step A1 is specifically included:
Step A11, the hardware decoder obtains the corresponding data flow of the video by decoding, and records in the data flow
Erroneous video frame；
Step A12, the inner nuclear layer abandons the erroneous video frame, and the normal video frame in the data flow is stored to institute
It states in the first cache unit；
Step A13, the inner nuclear layer store the part data flow from first cache unit every preset period of time
Into current second cache unit.
8. video frame information data reporting method as claimed in claim 5, which is characterized in that
The IPTV set top box system includes the first buffer storage, first buffer storage respectively with the inner nuclear layer and described
The connection of player layer；
The IPTV set top box system include the second buffer storage, second buffer storage respectively with first buffer storage
It is connected with the player layer, second buffer storage reads the data frame of first buffer storage in real time, and will
The data frame after reading is stored into second buffer storage；
Different volume thresholds is arranged according to the resolution ratio of the video for second buffer storage；
Judge the data flow whether there is data underflow specifically includes the following steps:
Step B1, the player layer is by the size and correspondence of the current part data flow in second buffer storage
The volume threshold be compared；
When the size of the current part data flow is less than the volume threshold, step B2 is then executed；
When the size of the current part data flow is greater than or equal to the volume threshold, the current part number is determined
It is not data underflow according to each of stream video frame, then executes step B3；
Step B2 judges whether increase the new video frame after second buffer storage reads the data frame；
If so, determining that each of the current part data flow video frame does not occur data underflow；
If it is not, determining that data underflow occurs in the data frame read；
Step B3 sets the current part data flow for next part data flow, is then returned to step B1, directly
The quantity of the video frame of all parts data flow and the corresponding volume threshold are compared to completion.
9. video frame information data reporting method as claimed in claim 5, which is characterized in that
The middleware layer every a preset period of time calling section the pooling information, and in the pooling information
To Caton number, to be handled to obtain the Caton time according to the Caton number.
10. video frame information data reporting method as claimed in claim 9, which is characterized in that
Obtain the Caton time and the Caton time is compared with the default Caton time threshold specifically include with
Lower step:
Step C1, the middleware layer by it is described call function the pointer every the preset period of time obtain described in
The pooling information of part in preset period of time；
Step C2, the middleware layer handle the data underflow information of the pooling information of the part, with
Obtain the Caton number of the data flow in the preset period of time；
Step C3, the middleware layer are handled to obtain the Caton time according to the Caton number；
Step C4, judges whether the Caton time is greater than the default Caton time threshold；
If so, being denoted as Caton to the pooling information in the preset period of time for being greater than the default Caton time threshold
Data then execute step C5；
If it is not, executing step C5；
Step C5, return step C3, until the middleware layer is in each of the pooling information preset period of time
Caton time of the part data flow all judged.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110248227A (en) * | 2019-06-19 | 2019-09-17 | 福州瑞芯微电子股份有限公司 | A kind of efficient image display method and device |
| CN112995702A (en) * | 2019-12-16 | 2021-06-18 | 天翼智慧家庭科技有限公司 | Method and system for judging video blockage based on quality monitoring probe |
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