CN106027488A - Device and method for obtaining data - Google Patents
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- CN106027488A CN106027488A CN201610281232.8A CN201610281232A CN106027488A CN 106027488 A CN106027488 A CN 106027488A CN 201610281232 A CN201610281232 A CN 201610281232A CN 106027488 A CN106027488 A CN 106027488A
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- 238000012545 processing Methods 0.000 claims description 34
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- 238000004364 calculation method Methods 0.000 description 4
- 230000008520 organization Effects 0.000 description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/63—Control of cameras or camera modules by using electronic viewfinders
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Abstract
The invention discloses a device and method for obtaining data. The device comprises a judging module, an obtaining module, a checking module and a reading module. The judging module is used for judging whether a custom structure body is in a video file or not when multimedia information needs to be obtained, and informing the obtaining module when it is judged that the custom structure body is in the video file. The obtaining module is used for receiving the notification from the judging module and obtaining the field of the custom structure body. The checking module is used for checking the obtained filed of the custom structure body, and informing the reading module when the obtained field of the custom structure body is checked accurately. The reading module is used for receiving the notification from the checking module and reading the multimedia information of the video file from the custom structure body. According to the embodiment of the device and the method, the multimedia information can be obtained more rapidly, and the user experience is improved.
Description
Technical Field
The present invention relates to, but not limited to, intelligent terminal technologies, and in particular, to an apparatus and method for acquiring data.
Background
A system of the mobile terminal (such as an Android system, a Windows system, an apple system, and a nokia (Lumia) system) performs a full scan on all video files in the memory to obtain multimedia information of each video file when the mobile terminal is powered on or a secure digital memory (SD) card is inserted or removed.
Each video file contains multimedia information, such as the length, width, duration, average frame rate, bit rate, etc. of the video. Some multimedia information can be directly obtained by reading several bytes at corresponding positions of the video file, but other multimedia information, such as average frame rate, code rate, etc., can be obtained only by calculation. For example, the average frame rate needs to continuously read the timestamps of several frames, and then calculate the average value, taking continuously reading 30 frames as an example, if the difference between the timestamp of the 30 th frame and the timestamp of the first frame is t microseconds, the average frame rate is 1000000/(t/30) fps (frames per second)). The method for calculating the multimedia information is a time-consuming process, the loading speed of video playing is affected, the calculation needs to be carried out again for each loading to obtain the multimedia information, and the user experience is extremely poor.
Disclosure of Invention
The application provides a device and a method for acquiring data, which can acquire multimedia information more quickly and improve user experience.
To achieve the object of the present application, an embodiment of the present invention provides an apparatus for acquiring data, including: the device comprises a judging module, an obtaining module, a checking module and a reading module; wherein,
the judging module is used for judging whether a self-defined structural body exists in the video file when the multimedia information needs to be acquired; when the user-defined structural body exists in the video file, the acquisition module is informed;
the acquisition module is used for receiving the notification from the judgment module and acquiring the field of the self-defined structural body;
the verification module is used for verifying the obtained field of the self-defined structure body; when the obtained field of the self-defined structure is verified correctly, a reading module is informed;
and the reading module is used for receiving the notice from the verification module and reading the multimedia information of the video file from the self-defined structural body.
Optionally, the customized structure includes the following fields: length, identification ID, the multimedia information and a check value.
Optionally, the apparatus further comprises a processing module configured to:
calculating multimedia information of the video file;
calculating a first check value of the length, a first check value of the ID and a first check value of the multimedia information;
correspondingly adding the obtained multimedia information of the video file, the calculated first check value of the length, the first check value of the ID and the second check value of the multimedia information into the self-defined structural body;
and adding the self-defined structural body subjected to the adding processing into the video file.
Optionally, the verification module is specifically configured to:
calculating an obtained second check value of the length, a second check value of the ID and a second check value of the multimedia information;
judging whether the first check value of the length is the same as the second check value of the length; judging whether the first check value of the ID is the same as the second check value of the ID or not; judging whether the first check value of the multimedia information is the same as the second check value of the multimedia information;
when the first check value of the length is judged to be the same as the second check value of the length, the first check value of the ID is judged to be the same as the second check value of the ID, and the first check value of the multimedia information is judged to be the same as the second check value of the multimedia information, the obtained field check of the self-defined structure body is judged to be correct;
and when the first check value of the length is judged to be different from the second check value of the length, or the first check value of the ID is judged to be different from the second check value of the ID, or the first check value of the multimedia information is judged to be different from the second check value of the multimedia information, the obtained field check of the self-defined structural body is judged to be incorrect.
Optionally, the check module checks the obtained field of the user-defined structure body by using a cyclic redundancy check code CRC check method.
The embodiment of the invention also provides a method for acquiring data, which comprises the following steps:
when multimedia information needs to be acquired, judging whether a user-defined structural body exists in a video file;
when the video file is judged to have the self-defined structure, acquiring a field of the self-defined structure;
checking the obtained field of the self-defined structure;
and when the field of the obtained customized structural body is verified correctly, reading the multimedia information of the video file from the customized structural body.
Optionally, the customized structure includes the following fields: length, identification ID, the multimedia information and a check value.
Optionally, the method further comprises, before:
calculating multimedia information of the video file;
calculating a first check value of the length, a first check value of the ID and a first check value of the multimedia information;
correspondingly adding the obtained multimedia information of the video file, the calculated first check value of the length, the first check value of the ID and the second check value of the multimedia information into the self-defined structural body;
and adding the self-defined structural body subjected to the adding processing into the video file.
Optionally, the checking the obtained field of the customized structure includes:
calculating an obtained second check value of the length, a second check value of the ID and a second check value of the multimedia information;
judging whether the first check value of the length is the same as the second check value of the length; judging whether the first check value of the ID is the same as the second check value of the ID or not; judging whether the first check value of the multimedia information is the same as the second check value of the multimedia information;
when the first check value of the length is judged to be the same as the second check value of the length, the first check value of the ID is judged to be the same as the second check value of the ID, and the first check value of the multimedia information is judged to be the same as the second check value of the multimedia information, the obtained field check of the self-defined structure body is judged to be correct;
and when the first check value of the length is judged to be different from the second check value of the length, or the first check value of the ID is judged to be different from the second check value of the ID, or the first check value of the multimedia information is judged to be different from the second check value of the multimedia information, the obtained field check of the self-defined structural body is judged to be incorrect.
Optionally, the obtained field of the customized structure is checked by a cyclic redundancy check code CRC check method.
The embodiment of the invention comprises the following steps: the device comprises a judging module, an obtaining module, a checking module and a reading module; the judgment module is used for judging whether a user-defined structural body exists in the video file when the multimedia information needs to be acquired; when the user-defined structural body exists in the video file, the acquisition module is informed; the acquisition module is used for receiving the notification from the judgment module and acquiring the field of the self-defined structural body; the verification module is used for verifying the obtained field of the self-defined structure body; when the obtained field of the self-defined structure is verified correctly, a reading module is informed; and the reading module is used for receiving the notice from the verification module and reading the multimedia information of the video file from the self-defined structural body. The embodiment of the invention realizes the faster acquisition of the multimedia information and improves the user experience.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic diagram of a hardware structure of an alternative mobile terminal for implementing various embodiments of the present invention;
FIG. 2 is a schematic diagram of a communication system supporting communication between mobile terminals in accordance with the present invention;
FIG. 3 is a schematic diagram of an organization structure of a video file before processing according to the present invention;
FIG. 4 is a schematic diagram of an apparatus for acquiring data according to the present invention;
FIG. 5 is a flow chart of a method of acquiring data in accordance with the present invention;
FIG. 6 is a schematic diagram of an organization structure of a processed video file according to the present invention;
FIG. 7 is a flow chart of an embodiment of a method of acquiring data according to the present invention.
Detailed Description
The technical solution of the present invention will be described in more detail with reference to the accompanying drawings and examples.
A mobile terminal implementing various embodiments of the present invention will now be described with reference to the accompanying drawings. In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in themselves. Thus, "module" and "component" may be used in a mixture.
The mobile terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a smart phone, a notebook computer, a digital broadcast receiver, a PDA (personal digital assistant), a PAD (tablet computer), a PMP (portable multimedia player), a navigation device, and the like, and a stationary terminal such as a digital TV, a desktop computer, and the like. In the following, it is assumed that the terminal is a mobile terminal. However, it will be understood by those skilled in the art that the configuration according to the embodiment of the present invention can be applied to a fixed type terminal in addition to elements particularly used for moving purposes.
Fig. 1 is a schematic diagram of a hardware structure of an optional mobile terminal for implementing various embodiments of the present invention.
The mobile terminal 100 may include a wireless communication unit 110, an a/V (audio/video) input unit 120, an output unit 150, a memory 160, an interface unit 170, a controller 180, and a power supply unit 190, etc. Fig. 1 illustrates a mobile terminal having various components, but it is to be understood that not all illustrated components are required to be implemented. More or fewer components may alternatively be implemented. Elements of the mobile terminal will be described in detail below.
The wireless communication unit 110 typically includes one or more components that allow radio communication between the mobile terminal 100 and a wireless communication system or network. For example, the wireless communication unit may include at least one of a broadcast receiving module 111, a mobile communication module 112, and a wireless internet module 113.
The broadcast receiving module 111 receives a broadcast signal and/or broadcast associated information from an external broadcast management server via a broadcast channel. The broadcast channel may include a satellite channel and/or a terrestrial channel. The broadcast management server may be a server that generates and transmits a broadcast signal and/or broadcast associated information or a server that receives a previously generated broadcast signal and/or broadcast associated information and transmits it to a terminal. The broadcast signal may include a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and the like. Also, the broadcast signal may further include a broadcast signal combined with a TV or radio broadcast signal. The broadcast associated information may also be provided via a mobile communication network, and in this case, the broadcast associated information may be received by the mobile communication module 112. The broadcast signal may exist in various forms, for example, it may exist in the form of an Electronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB), an Electronic Service Guide (ESG) of digital video broadcasting-handheld (DVB-H), and the likeAt this point. The broadcast receiving module 111 may receive a signal broadcast by using various types of broadcasting systems. In particular, the broadcast receiving module 111 may receive a broadcast signal by using a signal such as multimedia broadcasting-terrestrial (DMB-T), digital multimedia broadcasting-satellite (DMB-S), digital video broadcasting-handheld (DVB-H), forward link media (MediaFLO)@) A digital broadcasting system of a terrestrial digital broadcasting integrated service (ISDB-T), etc. receives digital broadcasting. The broadcast receiving module 111 may be constructed to be suitable for various broadcasting systems that provide broadcast signals as well as the above-mentioned digital broadcasting systems. The broadcast signal and/or broadcast associated information received via the broadcast receiving module 111 may be stored in the memory 160 (or other type of storage medium).
The mobile communication module 112 transmits and/or receives radio signals to and/or from at least one of a base station (e.g., access point, node B, etc.), an external terminal, and a server. Such radio signals may include voice call signals, video call signals, or various types of data transmitted and/or received according to text and/or multimedia messages.
The wireless internet module 113 supports wireless internet access of the mobile terminal. The module may be internally or externally coupled to the terminal. The wireless internet access technology to which the module relates may include WLAN (wireless LAN) (Wi-Fi), Wibro (wireless broadband), Wimax (worldwide interoperability for microwave access), HSDPA (high speed downlink packet access), and the like.
The a/V input unit 120 is used to receive an audio or video signal. The a/V input unit 120 may include a camera 121 and a microphone 122, and the camera 121 processes image data of still pictures or video obtained by an image capturing apparatus in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 151. The image frames processed by the cameras 121 may be stored in the memory 160 (or other storage medium) or transmitted via the wireless communication unit 110, and two or more cameras 121 may be provided according to the construction of the mobile terminal. The microphone 122 may receive sounds (audio data) via the microphone in a phone call mode, a recording mode, a voice recognition mode, or the like, and can process such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the mobile communication module 112 in case of a phone call mode. The microphone 122 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.
The interface unit 170 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The identification module may store various information for authenticating a user using the mobile terminal 100 and may include a User Identity Module (UIM), a Subscriber Identity Module (SIM), a Universal Subscriber Identity Module (USIM), and the like. In addition, a device having an identification module (hereinafter, referred to as an "identification device") may take the form of a smart card, and thus, the identification device may be connected with the mobile terminal 100 via a port or other connection means. The interface unit 170 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal and the external device.
In addition, when the mobile terminal 100 is connected with an external cradle, the interface unit 170 may serve as a path through which power is supplied from the cradle to the mobile terminal 100 or may serve as a path through which various command signals input from the cradle are transmitted to the mobile terminal. Various command signals or power input from the cradle may be used as signals for recognizing whether the mobile terminal is accurately mounted on the cradle. The output unit 150 is configured to provide output signals (e.g., audio signals, video signals, alarm signals, vibration signals, etc.) in a visual, audio, and/or tactile manner. The output unit 150 may include a display unit 151, an audio output module 152, and the like.
The display unit 151 may display information processed in the mobile terminal 100. For example, when the mobile terminal 100 is in a phone call mode, the display unit 151 may display a User Interface (UI) or a Graphical User Interface (GUI) related to a call or other communication (e.g., text messaging, multimedia file downloading, etc.). When the mobile terminal 100 is in a video call mode or an image capturing mode, the display unit 151 may display a captured image and/or a received image, a UI or GUI showing a video or an image and related functions, and the like.
Meanwhile, when the display unit 151 and the touch pad are overlapped with each other in the form of a layer to form a touch screen, the display unit 151 may serve as an input device and an output device. The display unit 151 may include at least one of a Liquid Crystal Display (LCD), a thin film transistor LCD (TFT-LCD), an Organic Light Emitting Diode (OLED) display, a flexible display, a three-dimensional (3D) display, and the like. Some of these displays may be configured to be transparent to allow a user to view from the outside, which may be referred to as transparent displays, and a typical transparent display may be, for example, a TOLED (transparent organic light emitting diode) display or the like. Depending on the particular desired implementation, the mobile terminal 100 may include two or more display units (or other display devices), for example, the mobile terminal may include an external display unit (not shown) and an internal display unit (not shown). The touch screen may be used to detect a touch input pressure as well as a touch input position and a touch input area.
The audio output module 152 may convert audio data received by the wireless communication unit 110 or stored in the memory 160 into an audio signal and output as sound when the mobile terminal is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output module 152 may provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output module 152 may include a speaker, a buzzer, and the like.
The memory 160 may store software programs and the like for processing and controlling operations performed by the controller 180, or may temporarily store data (e.g., a phonebook, messages, still images, videos, and the like) that has been or will be output. Also, the memory 160 may store data regarding various ways of vibration and audio signals output when a touch is applied to the touch screen.
The memory 160 may include at least one type of storage medium including a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, and the like. Also, the mobile terminal 100 may cooperate with a network storage device that performs a storage function of the memory 160 through a network connection.
The controller 180 generally controls the overall operation of the mobile terminal. For example, the controller 180 performs control and processing related to voice calls, data communications, video calls, and the like. In addition, the controller 180 may include a multimedia module 181 for reproducing (or playing back) multimedia data, and the multimedia module 181 may be constructed within the controller 180 or may be constructed separately from the controller 180. The controller 180 may perform a pattern recognition process to recognize a handwriting input or a picture drawing input performed on the touch screen as a character or an image.
The power supply unit 190 receives external power or internal power and provides appropriate power required to operate various elements and components under the control of the controller 180.
The various embodiments described herein may be implemented in a computer-readable medium using, for example, computer software, hardware, or any combination thereof. For a hardware implementation, the embodiments described herein may be implemented using at least one of an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a Digital Signal Processing Device (DSPD), a Programmable Logic Device (PLD), a Field Programmable Gate Array (FPGA), a processor, a controller, a microcontroller, a microprocessor, an electronic unit designed to perform the functions described herein, and in some cases, such embodiments may be implemented in the controller 180. For a software implementation, the implementation such as a process or a function may be implemented with a separate software module that allows performing at least one function or operation. The software codes may be implemented by software applications (or programs) written in any suitable programming language, which may be stored in the memory 160 and executed by the controller 180.
Up to this point, mobile terminals have been described in terms of their functionality. Hereinafter, a slide-type mobile terminal among various types of mobile terminals, such as a folder-type, bar-type, swing-type, slide-type mobile terminal, and the like, will be described as an example for the sake of brevity. Accordingly, the present invention can be applied to any type of mobile terminal, and is not limited to a slide type mobile terminal.
The mobile terminal 100 as shown in fig. 1 may be configured to operate with communication systems such as wired and wireless communication systems and satellite-based communication systems that transmit data via frames or packets.
A communication system in which a mobile terminal according to the present invention is operable will now be described with reference to fig. 2.
Such communication systems may use different air interfaces and/or physical layers. For example, the air interface used by the communication system includes, for example, Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Code Division Multiple Access (CDMA), and Universal Mobile Telecommunications System (UMTS) (in particular, Long Term Evolution (LTE)), global system for mobile communications (GSM), and the like. By way of non-limiting example, the following description relates to a CDMA communication system, but such teachings are equally applicable to other types of systems.
Referring to fig. 2, the CDMA wireless communication system may include a plurality of mobile terminals 100, a plurality of Base Stations (BSs) 270, Base Station Controllers (BSCs) 275, and a Mobile Switching Center (MSC) 280. The MSC280 is configured to interface with a Public Switched Telephone Network (PSTN) 290. The MSC280 is also configured to interface with a BSC275, which may be coupled to the base station 270 via a backhaul. The backhaul may be constructed according to any of several known interfaces including, for example, E1/T1, ATM, IP, PPP, frame Relay, HDSL, ADSL, or xDSL. It will be understood that a system as shown in fig. 2 may include multiple BSCs 2750.
Each BS270 may serve one or more sectors (or regions), each sector covered by a multi-directional antenna or an antenna pointing in a particular direction being radially distant from the BS 270. Alternatively, each partition may be covered by two or more antennas for diversity reception. Each BS270 may be configured to support multiple frequency allocations, with each frequency allocation having a particular frequency spectrum (e.g., 1.25MHz,5MHz, etc.).
The intersection of partitions with frequency allocations may be referred to as a CDMA channel. The BS270 may also be referred to as a Base Transceiver Subsystem (BTS) or other equivalent terminology. In such a case, the term "base station" may be used to generically refer to a single BSC275 and at least one BS 270. The base stations may also be referred to as "cells". Alternatively, each sector of a particular BS270 may be referred to as a plurality of cell sites.
As shown in fig. 2, a Broadcast Transmitter (BT)295 transmits a broadcast signal to the mobile terminal 100 operating within the system. A broadcast receiving module 111 as shown in fig. 1 is provided at the mobile terminal 100 to receive a broadcast signal transmitted by the BT 295. In fig. 2, several Global Positioning System (GPS) satellites 300 are shown. The satellite 300 assists in locating at least one of the plurality of mobile terminals 100.
In fig. 2, a plurality of satellites 300 are depicted, but it is understood that useful positioning information may be obtained with any number of satellites. The GPS module 115 as shown in fig. 1 is generally configured to cooperate with satellites 300 to obtain desired positioning information. Other techniques that can track the location of the mobile terminal may be used instead of or in addition to GPS tracking techniques. In addition, at least one GPS satellite 300 may selectively or additionally process satellite DMB transmission.
As a typical operation of the wireless communication system, the BS270 receives reverse link signals from various mobile terminals 100. The mobile terminal 100 is generally engaged in conversations, messaging, and other types of communications. Each reverse link signal received by a particular base station 270 is processed within the particular BS 270. The obtained data is forwarded to the associated BSC 275. The BSC provides call resource allocation and mobility management functions including coordination of soft handoff procedures between BSs 270. The BSCs 275 also route the received data to the MSC280, which provides additional routing services for interfacing with the PSTN 290. Similarly, the PSTN290 interfaces with the MSC280, the MSC interfaces with the BSCs 275, and the BSCs 275 accordingly control the BS270 to transmit forward link signals to the mobile terminal 100.
Based on the above mobile terminal hardware structure and communication system, the present invention provides various embodiments of the method.
The applicant finds that currently common video container formats (such as mp4, avi, mkv, and the like) organize video stream information and data in a video file in the form of a structure (box), and the forms of the structures all have a uniform format standard, and data outside the structure is not used as a video parsing object. For example, mp4, its video file mainly consists of boxes such as ftyp, moov, mdat, etc., as shown in fig. 3. On this basis, the applicant has defined a box for storing multimedia information of video files and the like, which will be explained below by means of specific embodiments.
Fig. 4 is a schematic structural diagram of an apparatus for acquiring data according to the present invention, as shown in fig. 4, including: a judging module 40, an obtaining module 41, a verifying module 42 and a reading module 43. Wherein,
the judging module 40 is used for judging whether a user-defined structural body exists in the video file when the multimedia information needs to be acquired; when it is determined that the customized structure exists in the video file, the obtaining module 41 is notified.
The customized structure comprises the following fields: length, identification ID, multimedia information and check value.
And an obtaining module 41, configured to receive the notification from the determining module 40, and obtain the field of the customized structure.
The checking module 42 is used for checking the obtained field of the self-defined structure; when the field check of the obtained custom structure is correct, the reading module 43 is notified.
The verification module 42 is specifically configured to:
calculating a second check value of the obtained length, a second check value of the ID and a second check value of the multimedia information;
judging whether the first check value of the length is the same as the second check value of the length; judging whether the first check value of the ID is the same as the second check value of the ID; judging whether the first check value of the multimedia information is the same as the second check value of the multimedia information;
when the first check value of the length is judged to be the same as the second check value of the length, the first check value of the ID is judged to be the same as the second check value of the ID, and the first check value of the multimedia information is judged to be the same as the second check value of the multimedia information, the field check of the obtained self-defined structure body is judged to be correct;
and when the first check value of the length is different from the second check value of the length, or the first check value of the ID is different from the second check value of the ID, or the first check value of the multimedia information is different from the second check value of the multimedia information, judging that the field check of the obtained customized structural body is incorrect.
The check module 42 checks the field of the obtained customized structure by using a Cyclic Redundancy Check (CRC) check method.
And a reading module 43, configured to receive the notification from the verification module 42, and read the multimedia information of the video file from the customized structure.
Optionally, the apparatus further comprises a processing module 44 for:
calculating multimedia information of the video file;
calculating a first check value of the length, a first check value of the ID and a first check value of the multimedia information;
correspondingly adding the multimedia information of the obtained video file, the first check value of the calculated length, the first check value of the ID and the second check value of the multimedia information into a self-defined structural body;
and adding the self-defined structural body subjected to the adding processing into the video file.
The processing module 44 may calculate the first check value of the length, the first check value of the ID, and the first check value of the multimedia information by using a CRC check method. It should be noted that how to calculate the check value by using the CRC check method belongs to the conventional technical means known to those skilled in the art, and the description is not repeated herein, and is not intended to limit the present application. In addition, other verification methods than the CRC method are also within the scope of the present application, and are not described herein again.
Optionally, the checking module 42 is further configured to notify the processing module 44 when the field check of the obtained customized structure is incorrect.
Optionally, the determining module 40 is further configured to notify the processing module 44 when it is determined that the customized structure does not exist in the video file. Accordingly, the number of the first and second electrodes,
the processing module 44 is further configured to calculate multimedia information of the video file when receiving the notification from the determining module 40 or the verifying module 42; the calculated multimedia information is sent to the reading module 43. Accordingly, the reading module 43 is further configured to receive the multimedia information sent from the processing module 44. Optionally, the processing module 44 is further configured to calculate a first check value of the length, a first check value of the ID, and a first check value of the multimedia information; correspondingly adding the multimedia information of the obtained video file, the first check value of the calculated length, the first check value of the ID and the second check value of the multimedia information into a self-defined structural body; and adding the self-defined structural body subjected to the adding processing into the video file.
Alternatively, the above device may be provided in a mobile terminal.
The judging module 40, the obtaining module 41, and the verifying module 42 may be disposed in the controller 180 in fig. 2; the reading module 43 may be provided in the memory 160 in fig. 2; the processing module 44 may be provided in the controller 180 in fig. 2.
In a preferred embodiment, the apparatus in the preferred embodiment comprises: a processing module 44, a judging module 40, an obtaining module 41, a verifying module 42 and a reading module 43. Wherein,
a processing module 44 for calculating multimedia information of the video file; calculating a first check value of the length, a first check value of the ID and a first check value of the multimedia information; correspondingly adding the multimedia information of the obtained video file, the first check value of the calculated length, the first check value of the ID and the second check value of the multimedia information into a self-defined structural body; and adding the self-defined structural body subjected to the adding processing into the video file.
The processing module 44 may calculate the first check value of the length, the first check value of the ID, and the first check value of the multimedia information by using a CRC check method. It should be noted that how to calculate the check value by using the CRC check method belongs to the conventional technical means known to those skilled in the art, and the description is not repeated herein, and is not intended to limit the present application. In addition, other verification methods than the CRC method are also within the scope of the present application, and are not described herein again.
The judging module 40 is used for judging whether a user-defined structural body exists in the video file when the multimedia information needs to be acquired; when it is determined that the customized structure exists in the video file, the obtaining module 41 is notified.
The customized structure comprises the following fields: length, identification ID, multimedia information and check value.
And an obtaining module 41, configured to receive the notification from the determining module 40, and obtain the field of the customized structure.
The checking module 42 is used for checking the obtained field of the self-defined structure; when the field check of the obtained custom structure is correct, the reading module 43 is notified.
The verification module 42 is specifically configured to:
calculating a second check value of the obtained length, a second check value of the ID and a second check value of the multimedia information;
judging whether the first check value of the length is the same as the second check value of the length; judging whether the first check value of the ID is the same as the second check value of the ID; judging whether the first check value of the multimedia information is the same as the second check value of the multimedia information;
when the first check value of the length is judged to be the same as the second check value of the length, the first check value of the ID is judged to be the same as the second check value of the ID, and the first check value of the multimedia information is judged to be the same as the second check value of the multimedia information, the field check of the obtained self-defined structure body is judged to be correct;
and when the first check value of the length is different from the second check value of the length, or the first check value of the ID is different from the second check value of the ID, or the first check value of the multimedia information is different from the second check value of the multimedia information, judging that the field check of the obtained customized structural body is incorrect.
The check module 42 checks the field of the obtained customized structure by using a Cyclic Redundancy Check (CRC) check method.
And a reading module 43, configured to receive the notification from the verification module 42, and read the multimedia information of the video file from the customized structure.
Optionally, the checking module 42 is further configured to notify the processing module 44 when the field check of the obtained customized structure is incorrect.
Optionally, the determining module 40 is further configured to notify the processing module 44 when it is determined that the customized structure does not exist in the video file. Accordingly, the number of the first and second electrodes,
the processing module 44 is further configured to calculate multimedia information of the video file when receiving the notification from the determining module 40 or the verifying module 42; the calculated multimedia information is sent to the reading module 43. Accordingly, the reading module 43 is further configured to receive the multimedia information sent from the processing module 44. Optionally, the processing module 44 is further configured to calculate a first check value of the length, a first check value of the ID, and a first check value of the multimedia information; correspondingly adding the multimedia information of the obtained video file, the first check value of the calculated length, the first check value of the ID and the second check value of the multimedia information into a self-defined structural body; and adding the self-defined structural body subjected to the adding processing into the video file.
Alternatively, the above device may be provided in a mobile terminal.
Fig. 5 is a flowchart of a method for acquiring data according to the present invention, as shown in fig. 5, including:
step 501: and when the multimedia information needs to be acquired, judging whether the video file has a self-defined structural body.
Wherein the custom structure (box) comprises the following fields: length, identification ID, multimedia information and check value. The structure of the customized structure body in the application is as follows:
the signaled int (n) xmlContent stores multimedia information in xml format. In order not to conflict with the ID of the existing structure (because the format of the ID has a standard specification which defines some already used IDs), any number of four bytes which is not an ASIC code may be used as the ID of the structure customized in the present application, for example, the ID of the structure customized in the present application may be 0xf1faa38 f. As shown in fig. 6, the structure of the video file processed by the present invention is schematically illustrated, where ID 0xf1faa38f indicates the position of the above-mentioned customized structure in the video file.
Step 502: and when the video file is judged to have the self-defined structure, acquiring the field of the self-defined structure.
Step 503: and checking the obtained field of the self-defined structure.
Optionally, the method further comprises, before:
calculating multimedia information of the video file;
calculating a first check value of the length, a first check value of the ID and a first check value of the multimedia information;
correspondingly adding the multimedia information of the obtained video file, the first check value of the calculated length, the first check value of the ID and the second check value of the multimedia information into a self-defined structural body;
and adding the customized structural body subjected to the adding processing into the video file. Fig. 6 is a schematic diagram of the video file organization structure of the present application.
It should be noted that how to obtain (calculate) multimedia information of a video file belongs to the conventional technical means known to those skilled in the art, and the description is not repeated herein, and is not intended to limit the present application.
The Check value of the length, the Check value of the ID, and the Check value of the multimedia information may be calculated by a Cyclic Redundancy Check (CRC) Check method. It should be noted that how to calculate the check value by using the CRC check method belongs to the conventional technical means known to those skilled in the art, and the description is not repeated herein, and is not intended to limit the present application. In addition, other verification methods than the CRC method are also within the scope of the present application, and are not described herein again.
And checking the obtained field of the user-defined structure body by adopting a cyclic redundancy check code (CRC) checking method.
Wherein, step 503 specifically includes:
calculating a second check value of the obtained length, a second check value of the ID and a second check value of the multimedia information;
judging whether the first check value of the length is the same as the second check value of the length; judging whether the first check value of the ID is the same as the second check value of the ID; judging whether the first check value of the multimedia information is the same as the second check value of the multimedia information;
when the first check value of the length is judged to be the same as the second check value of the length, the first check value of the ID is judged to be the same as the second check value of the ID, and the first check value of the multimedia information is judged to be the same as the second check value of the multimedia information, the field check of the obtained self-defined structure body is judged to be correct;
and when the first check value of the length is different from the second check value of the length, or the first check value of the ID is different from the second check value of the ID, or the first check value of the multimedia information is different from the second check value of the multimedia information, judging that the field check of the obtained customized structural body is incorrect.
Optionally, when the field check of the obtained customized structure is incorrect, or it is determined that the customized structure does not exist in the video file, the method further includes: executing the steps of calculating the multimedia information of the video file; calculating a first check value of the length, a first check value of the ID and a first check value of the multimedia information; correspondingly adding the multimedia information of the obtained video file, the first check value of the calculated length, the first check value of the ID and the second check value of the multimedia information into a self-defined structural body; and adding the customized structural body subjected to the adding processing into the video file.
Step 504: and when the field of the obtained customized structural body is verified correctly, reading the multimedia information of the video file from the customized structural body.
In the embodiment of the invention, when the self-defined structural body exists in the video file, the field of the self-defined structural body is obtained and the field of the obtained self-defined structural body is verified, and when the field of the obtained self-defined structural body is verified correctly, the multimedia information of the video file is read from the self-defined structural body, so that the multimedia information can be obtained more quickly, and the user experience is improved. Since the amount of calculation for obtaining (calculating) the multimedia information of a video file at a time is large and a long time is required, and the multimedia information of the video file needs to be recalculated each time the multimedia information of the video file needs to be obtained in the prior art, the scanning speed and the loading speed during playing of the video file are very slow, which affects the user experience. In the application, the multimedia information obtained by only obtaining (calculating) the multimedia information of the video file once at the beginning is added into the self-defined structural body, and after the verification, the multimedia information is only required to be read from the self-defined structural body, so that the defect of repeated calculation is avoided, and the user experience is improved.
Fig. 7 is a flowchart of an embodiment of a method for acquiring data according to the present invention, as shown in fig. 7, including:
step 700: video files are pre-processed.
The method specifically comprises the following steps:
calculating multimedia information of the video file;
calculating a first check value of the length, a first check value of the ID and a first check value of the multimedia information;
correspondingly adding the multimedia information of the obtained video file, the first check value of the calculated length, the first check value of the ID and the second check value of the multimedia information into a self-defined structural body;
and adding the customized structural body subjected to the adding processing into the video file. Fig. 6 is a schematic diagram of the video file organization structure of the present application.
It should be noted that how to calculate the multimedia information of the video file belongs to the conventional technical means known to those skilled in the art, and the description is not repeated herein, and is not intended to limit the present application.
The first Check value of the length, the first Check value of the ID, and the first Check value of the multimedia information may be calculated by using a Cyclic Redundancy Check (CRC) Check method. It should be noted that how to calculate the check value by using the CRC check method belongs to the conventional technical means known to those skilled in the art, and the description is not repeated herein, and is not intended to limit the present application. In addition, other verification methods than the CRC method are also within the scope of the present application, and are not described herein again.
Step 701: and when the multimedia information needs to be acquired, judging whether the video file has a self-defined structural body. When judging that the video file has the self-defined structure, turning to step 702; otherwise, go to step 705.
The structure of the customized structure body in the application is as follows:
the signaled int (n) xmlContent stores multimedia information in xml format. In order not to conflict with the ID of the existing structure (because the format of the ID has a standard specification which defines some already used IDs), any number of four bytes which is not an ASIC code may be used as the ID of the structure customized in the present application, for example, the ID of the structure customized in the present application may be 0xf1faa38 f. As shown in fig. 6, the structure of the video file processed by the present invention is schematically illustrated, where ID 0xf1faa38f indicates the position of the above-mentioned customized structure in the video file.
Step 702: and acquiring the field of the self-defined structure.
Wherein the custom structure (box) comprises the following fields: length, identification ID, multimedia information and check value.
Step 703: and checking the obtained field of the self-defined structure. When the field check of the obtained self-defined structure is correct, the step 704 is carried out; otherwise, go to step 705.
And checking the obtained field of the user-defined structure body by adopting a cyclic redundancy check code (CRC) checking method.
Wherein, step 703 specifically includes:
calculating a second check value of the obtained length, a second check value of the ID and a second check value of the multimedia information;
judging whether the first check value of the length is the same as the second check value of the length; judging whether the first check value of the ID is the same as the second check value of the ID; judging whether the first check value of the multimedia information is the same as the second check value of the multimedia information;
when the first check value of the length is judged to be the same as the second check value of the length, the first check value of the ID is judged to be the same as the second check value of the ID, and the first check value of the multimedia information is judged to be the same as the second check value of the multimedia information, the field check of the obtained self-defined structure body is judged to be correct;
and when the first check value of the length is different from the second check value of the length, or the first check value of the ID is different from the second check value of the ID, or the first check value of the multimedia information is different from the second check value of the multimedia information, judging that the field check of the obtained customized structural body is incorrect.
Step 704: and reading the multimedia information of the video file from the customized structural body.
Step 705: the multimedia information of the video file is calculated.
Step 706: and calculating a first check value of the length, a first check value of the ID and a first check value of the multimedia information.
Step 707: and correspondingly adding the multimedia information of the obtained video file, the calculated first check value of the length, the first check value of the ID and the second check value of the multimedia information into a self-defined structural body.
Step 708: and adding the customized structural body subjected to the adding processing into the video file.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by a program instructing associated hardware (e.g., a processor) to perform the steps, and the program may be stored in a computer readable storage medium, such as a read only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, the modules/units in the above embodiments may be implemented in hardware, for example, by an integrated circuit, or may be implemented in software, for example, by a processor executing programs/instructions stored in a memory to implement the corresponding functions. The present invention is not limited to any specific form of combination of hardware and software.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (10)
1. An apparatus for acquiring data, comprising: the device comprises a judging module, an obtaining module, a checking module and a reading module; wherein,
the judging module is used for judging whether a self-defined structural body exists in the video file when the multimedia information needs to be acquired; when the user-defined structural body exists in the video file, the acquisition module is informed;
the acquisition module is used for receiving the notification from the judgment module and acquiring the field of the self-defined structural body;
the verification module is used for verifying the obtained field of the self-defined structure body; when the obtained field of the self-defined structure is verified correctly, a reading module is informed;
and the reading module is used for receiving the notice from the verification module and reading the multimedia information of the video file from the self-defined structural body.
2. The apparatus of claim 1, wherein the custom structure comprises the following fields: length, identification ID, the multimedia information and a check value.
3. The apparatus of claim 2, further comprising a processing module configured to:
calculating multimedia information of the video file;
calculating a first check value of the length, a first check value of the ID and a first check value of the multimedia information;
correspondingly adding the obtained multimedia information of the video file, the calculated first check value of the length, the first check value of the ID and the second check value of the multimedia information into the self-defined structural body;
and adding the self-defined structural body subjected to the adding processing into the video file.
4. The apparatus of claim 3, wherein the verification module is specifically configured to:
calculating an obtained second check value of the length, a second check value of the ID and a second check value of the multimedia information;
judging whether the first check value of the length is the same as the second check value of the length; judging whether the first check value of the ID is the same as the second check value of the ID or not; judging whether the first check value of the multimedia information is the same as the second check value of the multimedia information;
when the first check value of the length is judged to be the same as the second check value of the length, the first check value of the ID is judged to be the same as the second check value of the ID, and the first check value of the multimedia information is judged to be the same as the second check value of the multimedia information, the obtained field check of the self-defined structure body is judged to be correct;
and when the first check value of the length is judged to be different from the second check value of the length, or the first check value of the ID is judged to be different from the second check value of the ID, or the first check value of the multimedia information is judged to be different from the second check value of the multimedia information, the obtained field check of the self-defined structural body is judged to be incorrect.
5. The apparatus of claim 1, wherein the check module checks the obtained field of the custom structure by using a Cyclic Redundancy Check (CRC) method.
6. A method of acquiring data, comprising:
when multimedia information needs to be acquired, judging whether a user-defined structural body exists in a video file;
when the video file is judged to have the self-defined structure, acquiring a field of the self-defined structure;
checking the obtained field of the self-defined structure;
and when the field of the obtained customized structural body is verified correctly, reading the multimedia information of the video file from the customized structural body.
7. The method of claim 6, wherein the custom structure comprises the following fields: length, identification ID, the multimedia information and a check value.
8. The method of claim 7, further comprising, prior to the method:
calculating multimedia information of the video file;
calculating a first check value of the length, a first check value of the ID and a first check value of the multimedia information;
correspondingly adding the obtained multimedia information of the video file, the calculated first check value of the length, the first check value of the ID and the second check value of the multimedia information into the self-defined structural body;
and adding the self-defined structural body subjected to the adding processing into the video file.
9. The method of claim 8, wherein the checking the obtained field of the custom structure comprises:
calculating an obtained second check value of the length, a second check value of the ID and a second check value of the multimedia information;
judging whether the first check value of the length is the same as the second check value of the length; judging whether the first check value of the ID is the same as the second check value of the ID or not; judging whether the first check value of the multimedia information is the same as the second check value of the multimedia information;
when the first check value of the length is judged to be the same as the second check value of the length, the first check value of the ID is judged to be the same as the second check value of the ID, and the first check value of the multimedia information is judged to be the same as the second check value of the multimedia information, the obtained field check of the self-defined structure body is judged to be correct;
and when the first check value of the length is judged to be different from the second check value of the length, or the first check value of the ID is judged to be different from the second check value of the ID, or the first check value of the multimedia information is judged to be different from the second check value of the multimedia information, the obtained field check of the self-defined structural body is judged to be incorrect.
10. The method of claim 6, wherein the obtained fields of the custom structure are checked using a Cyclic Redundancy Check (CRC) method.
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Application publication date: 20161012 |