CN109194966B

CN109194966B - Method and device for acquiring payload of SEI (solid electrolyte interface) message and storage medium

Info

Publication number: CN109194966B
Application number: CN201810879747.7A
Authority: CN
Inventors: 陈果
Original assignee: Guangzhou Kugou Computer Technology Co Ltd
Current assignee: Guangzhou Kugou Computer Technology Co Ltd
Priority date: 2018-08-03
Filing date: 2018-08-03
Publication date: 2021-04-27
Anticipated expiration: 2038-08-03
Also published as: CN109194966A

Abstract

The invention discloses a method and a device for acquiring a payload of an SEI message and a storage medium, and belongs to the technical field of electronics. The method is applied to a first device and comprises the following steps: acquiring an SEI message, wherein the payload of the SEI message is positioned at the end of the SEI message; determining the number of bytes of the payload of the SEI message; acquiring a first character string corresponding to the byte number of the effective load of the SEI message, wherein the byte number of the first character string is a; adding a first character string after the SEI message to obtain a first message; and sending the first message to the second equipment, and acquiring the payload of the SEI message from the first message by the second equipment according to the first character string. The method and the device can realize the analysis of the SEI message from back to front, thereby bypassing other fields possibly existing before the payload of the SEI message to analyze the SEI message and further accurately acquiring the payload of the SEI message.

Description

Method and device for acquiring payload of SEI (solid electrolyte interface) message and storage medium

Technical Field

The present invention relates to the field of electronic technologies, and in particular, to a method, an apparatus, and a storage medium for acquiring a payload of an SEI (Supplemental enhancement information) message.

Background

SEI messages are used to assist in processing decoding, display, etc., operations, which may contain timing information or other supplemental data that may enhance the decoded video but is not necessary. SEI messages are often used for transmission of custom data, since they do not affect the decoding of a video decoder.

In the related art, when the self-defining data is transmitted by using an SEI message, the first device adds the self-defining data to a data field of the SEI message as a payload of the SEI message, and sends the SEI message to the second device; and after receiving the SEI message, the second device analyzes the length field of the SEI message to obtain the number of bytes of the payload, and determines the n-byte character strings behind the length field in the SEI message as the payload of the SEI message, so as to obtain the custom data, wherein n is the number of bytes of the payload.

However, since the first device often adds other fields between the length field and the payload of the SEI message, such as an UUID (Universally Unique Identifier) field, the second device cannot accurately skip the fields located after the length field to obtain the payload if the added fields between the length field and the payload of the SEI message cannot be accurately known, which results in low accuracy of the obtained payload.

Disclosure of Invention

The embodiment of the invention provides a method and a device for acquiring an SEI message payload and a storage medium, which can solve the problem of low acquisition accuracy of the SEI message payload in the related art. The technical scheme is as follows:

in a first aspect, a method for acquiring a payload of an SEI message is provided, where the method is applied to a first device, and the method includes:

acquiring an SEI message, wherein the payload of the SEI message is positioned at the end of the SEI message;

determining a number of bytes of a payload of the SEI message;

acquiring a first character string corresponding to the byte number of the payload of the SEI message, wherein the byte number of the first character string is a;

adding the first character string after the SEI message to obtain a first message;

and sending the first message to second equipment, and acquiring the payload of the SEI message from the first message by the second equipment according to the first character string.

Optionally, the obtaining a first character string corresponding to the number of bytes of the payload of the SEI message includes:

and acquiring a corresponding character string as a first character string from the corresponding relation between the stored byte number and the character string according to the byte number of the effective load of the SEI message.

Optionally, the sending the first message to the second device includes:

adding a second character string after the first message to obtain a second message, wherein the number of bytes of the second character string is b;

and sending the second message to the second equipment.

In a second aspect, a method for acquiring a payload of an SEI message is provided, which is applied to a second device, and includes:

receiving a first message sent by a first device, wherein the first message comprises an SEI message and a first character string, and the payload of the SEI message is positioned at the end of the SEI message;

determining a character string of a bytes located at the end of the first message as the first character string;

acquiring the number of effective load bytes corresponding to the first character string;

determining a c-byte string of the first message, which is located before the first string and adjacent to the first string, as a payload of the SEI message, wherein c is the number of bytes of the payload.

Optionally, the obtaining the number of bytes of the payload corresponding to the first character string includes:

and acquiring the corresponding byte number as the byte number of the effective load from the corresponding relation between the stored character string and the byte number according to the first character string.

Optionally, the receiving a first message sent by a first device includes:

receiving a target message which is sent by the first equipment and contains the SEI message;

acquiring a character string of b bytes positioned at the tail of the target message;

when the acquired character string is a second character string, determining that the target message is a second message;

and determining the part of the second message except the second character string as the first message.

In a third aspect, an apparatus for acquiring a payload of an SEI message is provided, which is applied to a first device, and includes:

the device comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring an SEI message, and the payload of the SEI message is positioned at the tail of the SEI message;

a determining module for determining a number of bytes of a payload of the SEI message;

a second obtaining module, configured to obtain a first character string corresponding to a number of bytes of a payload of the SEI message, where the number of bytes of the first character string is a;

the adding module is used for adding the first character string after the SEI message to obtain a first message;

and the sending module is used for sending the first message to second equipment, and the second equipment acquires the payload of the SEI message from the first message according to the first character string.

Optionally, the second obtaining module is configured to:

Optionally, the sending module includes:

the adding unit is used for adding a second character string after the first message to obtain a second message, wherein the byte number of the second character string is b;

and the sending unit is used for sending the second message to the second equipment.

In a fourth aspect, an apparatus for acquiring a payload of an SEI message is provided, which is applied to a second device, and includes:

a receiving module, configured to receive a first message sent by a first device, where the first message includes an SEI message and a first character string, and a payload of the SEI message is located at an end of the SEI message;

a first determining module, configured to determine a character string of a bytes located at the end of the first message as the first character string;

the acquisition module is used for acquiring the number of bytes of the effective load corresponding to the first character string;

a second determining module, configured to determine, as the payload of the SEI message, a character string of c bytes in the first message, where the character string is located before the first character string and adjacent to the first character string, and c is the number of bytes of the payload.

Optionally, the obtaining module is configured to:

Optionally, the receiving module includes:

a receiving unit, configured to receive a target message sent by the first device and including the SEI message;

the acquisition unit is used for acquiring the character strings of b bytes positioned at the tail of the target message;

the first determining unit is used for determining the target message as a second message when the acquired character string is a second character string;

and the second determining unit is used for determining the part except the second character string in the second message as the first message.

In a fifth aspect, a first device is provided, where the first device includes a processor, a memory, and a program code stored on the memory and executable on the processor, and the processor implements the method for acquiring the payload of the SEI message according to the first aspect when executing the program code.

In a sixth aspect, there is provided a second device, comprising a processor, a memory and a program code stored on the memory and executable on the processor, wherein the processor implements the method for acquiring the payload of the SEI message according to the second aspect when executing the program code.

In a seventh aspect, a computer-readable storage medium is provided, which has instructions stored thereon, and which when executed by a processor, implement the steps of the method for acquiring a payload of an SEI message according to the first aspect.

In an eighth aspect, a computer readable storage medium is provided, the storage medium having stored thereon instructions, which when executed by a processor, implement the steps of the method for acquiring a payload of an SEI message according to the second aspect.

The technical scheme provided by the embodiment of the invention can at least bring the following beneficial effects:

the method comprises the steps that first equipment obtains an SEI message, the number of bytes of a payload of the SEI message is determined, then a first character string corresponding to the number of bytes of the payload of the SEI message is obtained, and the number of bytes of the first character string is a. And then, the first device adds the first character string after the SEI message to obtain a first message, and sends the first message to the second device. When the second device receives the first message sent by the first device, the second device may obtain the payload of the SEI message from the first message according to the first character string. Therefore, the SEI message is analyzed from back to front, so that other fields possibly existing before the payload of the SEI message can be bypassed to analyze the SEI message, and the payload of the SEI message can be accurately acquired.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic illustration of an implementation environment provided by an embodiment of the invention;

fig. 2 is a flowchart of a method for acquiring a payload of an SEI message according to an embodiment of the present invention;

fig. 3 is a flowchart of another method for acquiring a payload of an SEI message according to an embodiment of the present invention;

fig. 4 is a flowchart of a method for acquiring a payload of an SEI message according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an apparatus for acquiring a payload of an SEI message according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of another SEI message payload acquisition apparatus according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a first device according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a second device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before explaining the embodiments of the present invention in detail, application scenarios and implementation environments of the embodiments of the present invention will be described.

First, an application scenario of the embodiment of the present invention is explained.

SEI messages are used to assist in processing decoding, display, etc., operations, which may contain timing information or other supplemental data that may enhance the decoded video but is not necessary. SEI messages are often used for transmission of custom data, since they do not affect the decoding of a video decoder. The embodiment of the invention is applied to the scene of transmitting the custom data by using the SEI message.

Next, an implementation environment provided by the embodiment of the present invention will be described.

FIG. 1 is a schematic diagram of an implementation environment provided by an embodiment of the invention. Referring to fig. 1, the implementation environment may include: the first device 101 and the second device 102, and the first device 101 and the second device 102 can communicate with each other through a wireless network or a wired network.

Wherein, the first device 101 may add the custom data to the data field of the SEI message as the payload of the SEI message, and then send the SEI message to the second device 102; after receiving the SEI message sent by the first device 101, the second device 102 may obtain a payload of the SEI message, thereby obtaining the custom data.

Fig. 2 is a flowchart of a method for acquiring a payload of an SEI message, which is applied to a first device according to an embodiment of the present invention. Referring to fig. 2, the method includes:

step 201: an SEI message is obtained, the payload of which is located at the end of the SEI message.

Step 202: the number of bytes of the payload of the SEI message is determined.

Step 203: acquiring a first character string corresponding to the byte number of the effective load of the SEI message, wherein the byte number of the first character string is a.

Step 204: and adding the first character string after the SEI message to obtain a first message.

Step 205: and sending the first message to the second equipment, and acquiring the payload of the SEI message from the first message by the second equipment according to the first character string.

In the embodiment of the invention, first equipment acquires an SEI message, determines the number of bytes of a payload of the SEI message, and then acquires a first character string corresponding to the number of bytes of the payload of the SEI message, wherein the number of bytes of the first character string is a. And then, the first device adds the first character string after the SEI message to obtain a first message, and sends the first message to the second device. When the second device receives the first message sent by the first device, the second device may obtain the payload of the SEI message from the first message according to the first character string. Therefore, the SEI message is analyzed from back to front, so that other fields possibly existing before the payload of the SEI message can be bypassed to analyze the SEI message, and the payload of the SEI message can be accurately acquired.

Optionally, obtaining a first character string corresponding to the number of bytes of the payload of the SEI message includes:

Optionally, sending the first message to the second device includes:

the second message is sent to the second device.

All the above optional technical solutions can be combined arbitrarily to form an optional embodiment of the present invention, which is not described in detail herein.

Fig. 3 is a flowchart of a method for acquiring a payload of an SEI message, where the method is applied to a second device according to an embodiment of the present invention. Referring to fig. 3, the method includes:

step 301: receiving a first message sent by a first device, wherein the first message comprises an SEI message and a first character string, and the payload of the SEI message is positioned at the end of the SEI message.

Step 302: a character string of a bytes located at the end of the first message is determined as a first character string.

Step 303: and acquiring the number of effective load bytes corresponding to the first character string.

Step 304: and determining a character string of c bytes which is positioned before the first character string and adjacent to the first character string in the first message as the payload of the SEI message, wherein c is the number of bytes of the payload.

In the embodiment of the present invention, the second device receives a first message sent by the first device, where the first message includes an SEI message and a first character string, and a payload of the SEI message is located at an end of the SEI message. And then, the second device determines the character string of a bytes at the end of the first message as a first character string, and then acquires the number of bytes of the payload corresponding to the first character string. Finally, the second device determines a character string of c bytes of the first message, which is located before and adjacent to the first character string, as the payload of the SEI message, where c is the number of bytes of the payload. Therefore, the SEI message is analyzed from back to front, so that other fields possibly existing before the payload of the SEI message can be bypassed to analyze the SEI message, and the payload of the SEI message can be accurately acquired.

Optionally, obtaining the number of bytes of the payload corresponding to the first character string includes:

Optionally, receiving a first message sent by a first device includes:

receiving a target message which is sent by first equipment and contains an SEI message;

acquiring a character string of b bytes positioned at the tail of a target message;

Fig. 4 is a flowchart of a method for acquiring a payload of an SEI message according to an embodiment of the present invention. Referring to fig. 4, the method includes:

step 401: the first device retrieves the SEI message.

It should be noted that the SEI message may be used to assist in processing operations such as decoding, displaying, etc., and may contain timing information or other supplemental data that may enhance the decoded video but is not necessary, and the SEI message may be carried in the video stream for transmission, and the carrying of the SEI message in the video stream does not affect the decoding of the video data.

In addition, the first device may transmit the custom data using an SEI message, and in particular, the first device may add the custom data to be transmitted to a data field of the SEI message as a payload of the SEI message, the payload of the SEI message being located at the end of the SEI message.

Step 402: the first device determines the number of bytes of the payload of the SEI message.

It should be noted that the number of bytes of the payload of the SEI message is the length of the data field of the SEI message.

Step 403: the first device acquires a first character string corresponding to the number of bytes of the payload of the SEI message.

It should be noted that the byte number of the first character string may be a, and a may be a preset number, for example, a may be 2, 3, and the like, which is not limited in this embodiment of the present invention.

Specifically, the first device may directly determine the number of bytes of the payload of the SEI message as the first string; or, according to the number of bytes of the payload of the SEI message, the corresponding character string may be obtained from the correspondence between the stored number of bytes and the character string as the first character string.

For example, if the number of bytes of the payload of the SEI message is 8 and the number of bytes of the first string is 2, the first device may directly determine the number of bytes of the payload of the SEI message as the first string, that is, the number of bytes of the payload of the SEI message corresponding to the first string is 8.

For another example, if the number of bytes of the payload of the SEI message is 8 and the number of bytes of the first string is 2, the first device may obtain, according to the number of bytes of the payload of the SEI message, the corresponding string 2 as the first string from the correspondence between the number of bytes and the string shown in table 1 below.

TABLE 1

Number of bytes	Character string (2 bytes)
		7	Character string 1
8	Character string 2
		9	Character string 3
……	……

It should be noted that, in the embodiment of the present invention, only the correspondence between the number of bytes and the character string shown in table 1 is taken as an example for description, and table 1 does not limit the embodiment of the present invention.

Step 404: and the first device adds the first character string after the SEI message to obtain a first message.

It should be noted that the first device adds the first character string after the SEI message to obtain the first message, that is, adds the first character string after the payload of the SEI message to obtain the first message. The first message now contains the SEI message and a first string, which is located after and adjacent to the payload of the SEI message.

Step 405: the first device sends the first message to the second device.

In practical application, the SEI message may or may not carry the custom data, and the second device generally only needs to parse the SEI message carrying the custom data (i.e., obtain the payload of the SEI message), but does not need to parse the SEI message not carrying the custom data. Therefore, in the embodiment of the present invention, in order to facilitate the subsequent second device to determine whether the SEI message carries the custom data, the first device may add the identification data in the first message, or may add the identification data after the first message. The identification data may be preset, and the identification data is used to indicate that the SEI message carries custom data.

If the first device adds the identification data to the first message, the first device may first add the preset identification data to the playoadtype field of the SEI message included in the first message, and then directly send the first message to the second device. If the first device adds the identification data after the first message, the first device may add the second character string after the first message to obtain a second message, and then send the second message to the second device.

It should be noted that the first device adds the second character string after the first message to obtain the second message, that is, adds the second character string after the first character string in the first message to obtain the second message. At this time, the second message includes the SEI message, a first string and a second string, the first string is located after and adjacent to the payload of the SEI message, and the second string is located after and adjacent to the first string.

In addition, the second character string is used to indicate that the SEI message carries the custom data, the second character string may be preset, the number of bytes of the second character string may be b, and b may be a preset number, for example, b may be 7, 8, and the like, which is not limited in this embodiment of the present invention. For example, if the MD5(Message-Digest Algorithm 5) value of a certain string is "34 c7733857d09 dbf", it may be represented as long long type data "0 x34c7733857d09 dbf" of 8 bytes, and the long type data is used as the second string.

It should be noted that, in the related art, preset identification data is often added in the playoadtype field of the SEI message, but since the usage of the playoadtype field is not constrained, the identification data defined therein by different vendors may be inconsistent, thereby causing great difficulty in subsequent parsing. In the embodiment of the present invention, the first device may add the second character string after the first message as the identification data, and the subsequent second device may directly determine whether the SEI message carries the custom data according to the second character string at the end of the second message, so that the difference of the playoadtype field of the SEI message may be bypassed, and the custom extension of the SEI message by different vendors under various conditions is compatible.

It should be noted that, when the first device sends the first message or the second message to the second device, the first message or the second message may be delivered to a plug flow SDK (Software Development Kit), and the plug flow SDK sends the first message or the second message to the second device. When the first message or the second message is sent to the second device, the first message or the second message may be sent to the second device separately, or the first message or the second message may be sent to the second device by being spliced into a video frame.

Step 406: the second device receives the first message sent by the first device.

It should be noted that, after receiving the message sent by the first device, the second device may first determine whether the message is a target message containing an SEI message, and when the message is the target message, continue to determine whether the SEI message contained in the target message carries the custom data, so that when it is determined that the SEI message contained in the target message carries the custom data, the first message is obtained from the target message. In practical application, the pull stream SDK may receive a message sent by the first device, and determine whether the message is a target message, and since the SEI message generally belongs to a transparent transmission form in the pull stream SDK, the pull stream SDK may throw the target message when determining that the message is the target message, and the second device continues to process the target message.

The operation of determining whether the received message sent by the first device is the target message containing the SEI message may refer to related technologies, which are not described in detail in the embodiments of the present invention.

The second device determines whether the SEI message contained in the target message carries the custom data, and when it is determined that the SEI message contained in the target message carries the custom data, a manner of acquiring the first message from the target message may be determined according to whether the first device directly transmits the first message or transmits the second message containing the first message. When the first device directly sends the first message, the second device can acquire data in a playoadtype field of the target message, and when the acquired data is preset identification data, the target message is determined to be the first message; when the first device sends a second message including the first message, the second device may obtain a b-byte character string located at the end of the target message, determine that the target message is the second message when the obtained character string is the second character string, and determine that a portion of the second message excluding the second character string is the first message.

It should be noted that, since the second message is obtained by adding the second character string to the first message, when the character string at the end of the target message is the second character string, the second device may determine that the target message is the second message, and may determine that the part of the second message other than the second character string is the first message.

Step 407: the second device determines a character string of a bytes located at the end of the first message as the first character string.

Since the first message is obtained by adding the first character string after the SEI message, and the number of bytes of the first character string is a, the first device may determine the character string of a bytes located at the end of the first message as the first character string.

Step 408: and the second equipment acquires the number of the effective load bytes corresponding to the first character string.

It should be noted that the number of bytes of the payload corresponding to the first character string is the number of bytes of the payload of the SEI message included in the first message.

Specifically, the manner in which the second device acquires the number of bytes of the payload corresponding to the first character string may be determined according to the manner in which the first device acquires the first character string corresponding to the number of bytes of the payload of the SEI message. When the first device directly determines the number of bytes of the payload of the SEI message as the first character string, the second device may directly determine the first character string as the number of bytes of the payload; when the first device obtains the corresponding character string as the first character string from the correspondence between the stored number of bytes and the character string according to the number of bytes of the payload of the SEI message, the second device may obtain the corresponding number of bytes as the number of bytes of the payload from the correspondence between the stored number of bytes and the number of bytes according to the first character string.

For example, the first string is 8, and when the first device directly determines the number of bytes of the payload of the SEI message as the first string, the second device may directly determine 8 as the number of bytes of the payload.

For another example, the first character string is character string 2, and when the first device obtains the corresponding character string as the first character string from the correspondence between the stored number of bytes and the character string according to the number of bytes of the payload of the SEI message, the second device may obtain the corresponding number of bytes from the correspondence between the character string and the number of bytes as shown in table 1 above as the number of bytes of the payload according to the first character string, that is, the number of bytes of the payload is 8.

Step 409: the second device determines a c-byte string of the first message that precedes and is adjacent to the first string as the payload of the SEI message, c being the number of bytes of the payload.

It should be noted that, since the number of bytes of the payload is the number of bytes of the payload of the SEI message included in the first message, the second device may determine, as the payload of the SEI message, a character string of c bytes of the first message that precedes and is adjacent to the first character string.

It is worth noting that in the embodiment of the present invention, the payload adjacent to the first character string in the SEI message may be directly obtained according to the first character string at the end of the first message, so that the SEI message is analyzed from the back to the front, that is, the SEI message is analyzed in a reverse manner, so that the difference of the SEI message itself may be ignored, other fields possibly existing before the payload of the SEI message are bypassed to analyze the SEI message, and the payload of the SEI message may be accurately obtained.

For ease of understanding, the above-described process of acquiring the payload of the SEI message is explained below in conjunction with steps (1) to (7).

(1) The method comprises the steps that first equipment obtains an SEI message and obtains a first character string corresponding to the number of bytes of a payload of the SEI message, and the number of bytes of the first character string is a.

(2) And the first equipment sequentially adds the first character string and the second character string after the SEI message to obtain a second message, wherein the byte number of the second character string is b.

(3) The first device sends the second message to the second device.

(4) And the second equipment receives the message sent by the first equipment and judges whether the message is a target message containing the SEI message.

(5) When the message is a target message, the second device acquires a b-byte character string located at the tail of the target message, and when the acquired character string is a second character string, acquires a-byte character string located before the second character string and adjacent to the second character string in the target message as a first character string.

(6) And the second equipment acquires the number of the effective load bytes corresponding to the first character string.

(7) And the second device acquires a character string of c bytes which is positioned before the first character string and adjacent to the first character string in the target message as the payload of the SEI message, wherein c is the number of bytes of the payload.

In the embodiment of the invention, first equipment acquires an SEI message, determines the number of bytes of a payload of the SEI message, and then acquires a first character string corresponding to the number of bytes of the payload of the SEI message, wherein the number of bytes of the first character string is a. And then, the first device adds the first character string after the SEI message to obtain a first message, and sends the first message to the second device. When the second device receives a first message sent by the first device, determining a character string of a bytes located at the end of the first message as a first character string, then acquiring the number of bytes of a payload corresponding to the first character string, and then determining a character string of c bytes located before the first character string and adjacent to the first character string in the first message as the payload of the SEI message, wherein c is the number of bytes of the payload. Therefore, the SEI message is analyzed from back to front, so that other fields possibly existing before the payload of the SEI message can be bypassed to analyze the SEI message, and the payload of the SEI message can be accurately acquired.

Fig. 5 is a schematic structural diagram of an apparatus for acquiring a payload of an SEI message according to an embodiment of the present invention, where the apparatus is applied to a first device. Referring to fig. 5, the apparatus includes a first obtaining module 501, a determining module 502, a second obtaining module 503, an adding module 504, and a sending module 505.

A first obtaining module 501, configured to obtain an SEI message, where a payload of the SEI message is located at the end of the SEI message;

a determining module 502, configured to determine a number of bytes of a payload of the SEI message;

a second obtaining module 503, configured to obtain a first character string corresponding to the number of bytes of the payload of the SEI message, where the number of bytes of the first character string is a;

an adding module 504, configured to add the first character string after the SEI message, to obtain a first message;

a sending module 505, configured to send the first message to the second device, where the second device obtains a payload of the SEI message from the first message according to the first character string.

Optionally, the second obtaining module 503 is configured to:

Optionally, the sending module 505 includes:

the adding unit is used for adding a second character string after the first message to obtain a second message, and the byte number of the second character string is b;

Fig. 6 is a schematic structural diagram of an apparatus for acquiring a payload of an SEI message according to an embodiment of the present invention, where the apparatus is applied to a second device. Referring to fig. 6, the apparatus includes a receiving module 601, a first determining module 602, an obtaining module 603, and a second determining module 604.

A receiving module 601, configured to receive a first message sent by a first device, where the first message includes an additional enhancement information SEI message and a first character string, and a payload of the SEI message is located at the end of the SEI message;

a first determining module 602, configured to determine a character string of a bytes located at the end of the first message as a first character string;

an obtaining module 603, configured to obtain a number of bytes of a payload corresponding to the first character string;

a second determining module 604, configured to determine a c-byte string, which is located before and adjacent to the first string, in the first message as a payload of the SEI message, where c is a number of bytes of the payload.

Optionally, the obtaining module 603 is configured to:

Optionally, the receiving module 601 includes:

a receiving unit, configured to receive a target message that includes an SEI message and is sent by a first device;

an acquisition unit, configured to acquire a string of b bytes located at the end of a target message;

the first determining unit is used for determining that the target message is the second message when the acquired character string is the second character string;

It should be noted that: the SEI message payload acquiring apparatus provided in the above embodiment is only illustrated by the above division of each functional module when acquiring the payload of the SEI message, and in practical applications, the above function allocation may be completed by different functional modules according to needs, that is, the internal structure of the apparatus is divided into different functional modules, so as to complete all or part of the above described functions. In addition, the above-mentioned embodiments provide an SEI message payload acquisition apparatus and an SEI message payload acquisition method embodiment, which belong to the same concept, and the specific implementation process thereof is described in detail in the method embodiment and is not described herein again.

Fig. 7 is a schematic structural diagram of a first device according to an embodiment of the present invention, where the first device may be a server 700, and the server 700 may be a server in a background server cluster. Specifically, the method comprises the following steps:

the server 700 includes a Central Processing Unit (CPU)701, a system memory 704 including a Random Access Memory (RAM)702 and a Read Only Memory (ROM)703, and a system bus 705 connecting the system memory 704 and the central processing unit 701. The server 700 also includes a basic input/output system (I/O system) 706, which facilitates transfer of information between devices within the computer, and a mass storage device 707 for storing an operating system 713, application programs 714, and other program modules 715.

The basic input/output system 706 includes a display 708 for displaying information and an input device 709, such as a mouse, keyboard, etc., for a user to input information. Wherein the display 708 and the input device 709 are connected to the central processing unit 701 through an input/output controller 710 connected to the system bus 705. The basic input/output system 706 may also include an input/output controller 710 for receiving and processing input from a number of other devices, such as a keyboard, mouse, or electronic stylus. Similarly, an input/output controller 710 may also provide output to a display screen, a printer, or other type of output device.

The mass storage device 707 is connected to the central processing unit 701 through a mass storage controller (not shown) connected to the system bus 705. The mass storage device 707 and its associated computer-readable media provide non-volatile storage for the server 700. That is, the mass storage device 707 may include a computer-readable medium (not shown), such as a hard disk or CD-ROM drive.

Without loss of generality, computer readable media may comprise computer storage media and communication media. Computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Computer storage media includes RAM, ROM, EPROM, EEPROM, flash memory or other solid state memory technology, CD-ROM, DVD, or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices. Of course, those skilled in the art will appreciate that computer storage media is not limited to the foregoing. The system memory 704 and mass storage device 707 described above may be collectively referred to as memory.

According to various embodiments of the invention, server 700 may also operate as a remote computer connected to a network through a network, such as the Internet. That is, the server 700 may be connected to the network 712 through a network interface unit 711 connected to the system bus 705, or the network interface unit 711 may be used to connect to other types of networks or remote computer systems (not shown).

The memory further includes one or more programs, and the one or more programs are stored in the memory and configured to be executed by the CPU. The one or more programs include instructions for performing the payload acquisition method of the SEI message provided by the fig. 2 embodiment.

Fig. 8 is a schematic structural diagram of a second device according to an embodiment of the present invention, where the second device may be a terminal 800, and the terminal 800 may be: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III, motion video Experts compression standard Audio Layer 3), an MP4 player (Moving Picture Experts Group Audio Layer IV, motion video Experts compression standard Audio Layer 4), a notebook computer, or a desktop computer. The terminal 800 may also be referred to by other names such as user equipment, portable terminal, laptop terminal, desktop terminal, etc.

In general, the terminal 800 includes: a processor 801 and a memory 802.

The processor 801 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so forth. The processor 801 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 801 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 801 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the display screen. In some embodiments, the processor 801 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.

Memory 802 may include one or more computer-readable storage media, which may be non-transitory. Memory 802 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 802 is used to store at least one instruction for execution by processor 801 to implement the payload acquisition method of SEI messages provided by the embodiment of fig. 3.

In some embodiments, the terminal 800 may further include: a peripheral interface 803 and at least one peripheral. The processor 801, memory 802 and peripheral interface 803 may be connected by bus or signal lines. Various peripheral devices may be connected to peripheral interface 803 by a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 804, a touch screen display 805, a camera 806, an audio circuit 807, a positioning component 808, and a power supply 809.

The peripheral interface 803 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 801 and the memory 802. In some embodiments, the processor 801, memory 802, and peripheral interface 803 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 801, the memory 802, and the peripheral interface 803 may be implemented on separate chips or circuit boards, which are not limited by this embodiment.

The Radio Frequency circuit 804 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 804 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 804 converts an electrical signal into an electromagnetic signal to be transmitted, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 804 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuit 804 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: metropolitan area networks, various generation mobile communication networks (2G, 3G, 4G, and 5G), Wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the radio frequency circuit 804 may further include NFC (Near Field Communication) related circuits, which are not limited in this application.

The display screen 805 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display 805 is a touch display, the display 805 also has the ability to capture touch signals on or above the surface of the display 805. The touch signal may be input to the processor 801 as a control signal for processing. At this point, the display 805 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display 805 may be one, providing the front panel of the terminal 800; in other embodiments, the display 805 may be at least two, respectively disposed on different surfaces of the terminal 800 or in a folded design; in still other embodiments, the display 805 may be a flexible display disposed on a curved surface or a folded surface of the terminal 800. Even further, the display 805 may be arranged in a non-rectangular irregular pattern, i.e., a shaped screen. The Display 805 can be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and other materials.

The camera assembly 806 is used to capture images or video. Optionally, camera assembly 806 includes a front camera and a rear camera. Generally, a front camera is disposed at a front panel of the terminal, and a rear camera is disposed at a rear surface of the terminal. In some embodiments, the number of the rear cameras is at least two, and each rear camera is any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize panoramic shooting and VR (Virtual Reality) shooting functions or other fusion shooting functions. In some embodiments, camera assembly 806 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.

The audio circuit 807 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 801 for processing or inputting the electric signals to the radio frequency circuit 804 to realize voice communication. For the purpose of stereo sound collection or noise reduction, a plurality of microphones may be provided at different portions of the terminal 800. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 801 or the radio frequency circuit 804 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, the audio circuitry 807 may also include a headphone jack.

The positioning component 808 is used to locate the current geographic position of the terminal 800 for navigation or LBS (Location Based Service). The Positioning component 808 may be a Positioning component based on the GPS (Global Positioning System) in the united states, the beidou System in china, the graves System in russia, or the galileo System in the european union.

Power supply 809 is used to provide power to various components in terminal 800. The power supply 809 can be ac, dc, disposable or rechargeable. When the power source 809 comprises a rechargeable battery, the rechargeable battery may support wired or wireless charging. The rechargeable battery may also be used to support fast charge technology.

In some embodiments, terminal 800 also includes one or more sensors 810. The one or more sensors 810 include, but are not limited to: acceleration sensor 811, gyro sensor 812, pressure sensor 813, fingerprint sensor 814, optical sensor 815 and proximity sensor 816.

The acceleration sensor 811 may detect the magnitude of acceleration in three coordinate axes of the coordinate system established with the terminal 800. For example, the acceleration sensor 811 may be used to detect the components of the gravitational acceleration in three coordinate axes. The processor 801 may control the touch screen 805 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 811. The acceleration sensor 811 may also be used for acquisition of motion data of a game or a user.

The gyro sensor 812 may detect a body direction and a rotation angle of the terminal 800, and the gyro sensor 812 may cooperate with the acceleration sensor 811 to acquire a 3D motion of the user with respect to the terminal 800. From the data collected by the gyro sensor 812, the processor 801 may implement the following functions: motion sensing (such as changing the UI according to a user's tilting operation), image stabilization at the time of photographing, game control, and inertial navigation.

Pressure sensors 813 may be disposed on the side bezel of terminal 800 and/or underneath touch display 805. When the pressure sensor 813 is disposed on the side frame of the terminal 800, the holding signal of the user to the terminal 800 can be detected, and the processor 801 performs left-right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 813. When the pressure sensor 813 is disposed at a lower layer of the touch display screen 805, the processor 801 controls the operability control on the UI interface according to the pressure operation of the user on the touch display screen 805. The operability control comprises at least one of a button control, a scroll bar control, an icon control and a menu control.

The fingerprint sensor 814 is used for collecting a fingerprint of the user, and the processor 801 identifies the identity of the user according to the fingerprint collected by the fingerprint sensor 814, or the fingerprint sensor 814 identifies the identity of the user according to the collected fingerprint. Upon identifying that the user's identity is a trusted identity, the processor 801 authorizes the user to perform relevant sensitive operations including unlocking a screen, viewing encrypted information, downloading software, paying for and changing settings, etc. Fingerprint sensor 814 may be disposed on the front, back, or side of terminal 800. When a physical button or a vendor Logo is provided on the terminal 800, the fingerprint sensor 814 may be integrated with the physical button or the vendor Logo.

The optical sensor 815 is used to collect the ambient light intensity. In one embodiment, the processor 801 may control the display brightness of the touch screen 805 based on the ambient light intensity collected by the optical sensor 815. Specifically, when the ambient light intensity is high, the display brightness of the touch display screen 805 is increased; when the ambient light intensity is low, the display brightness of the touch display 805 is turned down. In another embodiment, the processor 801 may also dynamically adjust the shooting parameters of the camera assembly 806 based on the ambient light intensity collected by the optical sensor 815.

A proximity sensor 816, also known as a distance sensor, is typically provided on the front panel of the terminal 800. The proximity sensor 816 is used to collect the distance between the user and the front surface of the terminal 800. In one embodiment, when the proximity sensor 816 detects that the distance between the user and the front surface of the terminal 800 gradually decreases, the processor 801 controls the touch display 805 to switch from the bright screen state to the dark screen state; when the proximity sensor 816 detects that the distance between the user and the front surface of the terminal 800 becomes gradually larger, the processor 801 controls the touch display 805 to switch from the screen-on state to the screen-on state.

Those skilled in the art will appreciate that the configuration shown in fig. 8 is not intended to be limiting of terminal 800 and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A method for acquiring a payload of an SEI message, applied to a first device, the method comprising:

acquiring an additional enhancement information SEI message, wherein the payload of the SEI message is positioned at the end of the SEI message;

determining a number of bytes of a payload of the SEI message;

acquiring a first character string corresponding to the byte number of the payload of the SEI message, wherein the byte number of the first character string is a, and the first character string is adjacent to the payload of the SEI message;

2. The method of claim 1, wherein the obtaining a first string corresponding to a number of bytes of a payload of the SEI message comprises:

3. The method of claim 1 or 2, wherein said sending the first message to a second device comprises:

and sending the second message to the second equipment.

4. A method for acquiring a payload of an SEI message, applied to a second device, the method comprising:

receiving a first message sent by a first device, wherein the first message comprises an additional enhancement information SEI message and a first character string, and the payload of the SEI message is positioned at the end of the SEI message;

5. The method of claim 4, wherein the obtaining the number of payload bytes corresponding to the first string comprises:

6. The method of claim 4 or 5, wherein receiving the first message sent by the first device comprises:

7. An apparatus for acquiring a payload of an SEI message, applied to a first device, the apparatus comprising:

a first obtaining module, configured to obtain an additional enhancement information SEI message, where a payload of the SEI message is located at an end of the SEI message;

a second obtaining module, configured to obtain a first character string corresponding to a number of bytes of a payload of the SEI message, where the number of bytes of the first character string is a, and the first character string is adjacent to the payload of the SEI message;

8. The apparatus of claim 7, wherein the second obtaining module is to:

9. The apparatus of claim 7 or 8, wherein the sending module comprises:

10. An apparatus for acquiring a payload of an SEI message, applied to a second device, the apparatus comprising:

a receiving module, configured to receive a first message sent by a first device, where the first message includes an additional enhancement information SEI message and a first character string, and a payload of the SEI message is located at an end of the SEI message;

11. The apparatus of claim 10, wherein the acquisition module is to:

12. The apparatus of claim 10 or 11, wherein the receiving module comprises:

13. A computer-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the steps of the method of any one of claims 1-3.

14. A computer-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the steps of the method of any of claims 4-6.