CN105760226A - Method, device and mobile terminal for quickly starting mobile terminal camera - Google Patents

Abstract

The present invention discloses a method, device and mobile terminal for quickly starting a mobile terminal camera. The method for quickly starting a mobile terminal camera provided by the present invention comprises: after receiving a mobile terminal camera start request, reading memory allocation information saved in a specified file; allocating the memory space pointed to in the memory allocation information to the camera for image data caching. Utilizing this method, the image data configuration operation of the mobile terminal camera is omitted when the camera is started, that is, the repeated application and allocation operation of the memory space for caching the camera's image data is omitted each time after receiving a camera start request, thereby saving 60ms to 80ms of time for allocating and applying for memory space for image data, thereby accelerating the startup of the mobile terminal camera and reducing the time consumption of the camera startup.

Description

Method, device and mobile terminal for quickly starting mobile terminal camera

technical field

Embodiments of the present invention relate to the technical field of mobile terminals, and in particular, to a method and device for quickly starting a camera of a mobile terminal, and a mobile terminal.

Background technique

The camera is a very important function in mobile devices such as mobile phones and tablet computers, and for users who like to capture beautiful moments, the startup speed of the camera is very important. However, based on the current camera start-up process, it can be seen that after receiving the mobile terminal camera start-up request, it is first necessary to configure the image data of the camera for the camera, so as to apply for and allocate corresponding cache space for the image data when the camera takes pictures, and then Only then can the camera be started to enter the display interface for taking pictures, to preview pictures or take pictures based on the camera.

Generally speaking, configuring the image data of the camera for the camera mainly includes allocating and applying for memory space for caching the above-mentioned image data for the preview data of the camera based on the camera and/or for the shooting data of the camera based on the camera. In the existing camera start-up process, in the image data configuration stage of the mobile terminal camera, it is necessary to complete the allocation and application of multiple memory spaces for caching image data, which takes up a lot of time for camera start-up, and the existing During the startup of the camera, every time a mobile terminal camera startup request is received, it is necessary to apply for and allocate memory space for the image data of the camera. The process takes more time.

Contents of the invention

The purpose of the present invention is to propose a method, device and mobile terminal for quickly starting the camera of a mobile terminal, so as to solve the problem of long camera start-up time in the mobile terminal.

On the one hand, an embodiment of the present invention provides a method for quickly starting a mobile terminal camera, including:

After receiving the mobile terminal camera startup request, read the memory allocation information saved in the specified file;

Allocating the memory space pointed to in the memory allocation information to the camera for image data caching.

On the other hand, an embodiment of the present invention provides a device for quickly starting a mobile terminal camera, including:

The information reading module is used to read the memory allocation information stored in the specified file after receiving the mobile terminal camera startup request;

A memory allocation module, configured to allocate the memory space pointed to in the memory allocation information to the camera for image data caching.

In yet another aspect, an embodiment of the present invention provides a mobile terminal, which integrates a device for quickly starting a mobile terminal camera provided by an embodiment of the present invention

Embodiments of the present invention provide a method, a device, and a mobile terminal for quickly starting the camera of a mobile terminal. The method for quickly starting the camera of a mobile terminal provided by the present invention can be summarized as: after receiving a start request of the camera on the mobile terminal, read the specified file The memory allocation information saved in; and the memory space pointed to in the memory allocation information is allocated to the camera for caching the camera image data. With this method, when the camera is started, the image data configuration operation of the camera of the mobile terminal is omitted, that is, the memory space for caching the image data of the camera is repeatedly executed each time after receiving the camera start request. The application operation saves 60 ms to 80 ms of time for allocating image data and applying for memory space, thereby speeding up the start-up of the mobile terminal camera, reducing the time-consuming of camera start-up, and improving the user experience of the mobile terminal.

Description of drawings

FIG. 1 is a schematic flowchart of a method for quickly starting a camera of a mobile terminal provided by Embodiment 1 of the present invention;

FIG. 2 is a schematic flowchart of a method for quickly starting a mobile terminal camera provided by Embodiment 2 of the present invention;

FIG. 3 is a schematic flowchart of a method for quickly starting a camera of a mobile terminal provided by Embodiment 3 of the present invention;

FIG. 4 is a structural block diagram of a device for quickly starting a mobile terminal camera provided by Embodiment 4 of the present invention;

FIG. 5 is a structural block diagram of an apparatus for quickly starting a camera of a mobile terminal provided by Embodiment 5 of the present invention.

detailed description

The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

Generally speaking, the startup process of the mobile terminal camera can be generally summarized as follows: after the user clicks the camera icon or clicks the set camera startup shortcut key, the camera will issue an instruction to the bottom layer of the camera to open the camera (the action is the main action initiated by the camera). The operation of opening the camera can be divided into three steps, one is to power on the camera and other initialization work; the other is to apply for and allocate memory space for the output of the image data of the camera, that is, to realize the image data of the camera configuration; the other is to wait for the camera to output image preview data, and display the camera interface of the camera. Wherein, it can be understood that the three-step operation of turning on the camera is performed sequentially. Exemplarily, assuming that the start-up time of the camera is 500ms, in the operation of turning on the camera, the initial work such as powering on the camera in the first step may take 150ms to 200ms, and in the second step, the image data of the camera is stored in memory The space application and allocation may take 60ms to 80ms, and the time spent waiting for the camera to output image preview data in the third step may also be 150ms to 200ms. time).

Analyzing the startup process of the camera, in general, except for the influence of hardware performance on the startup of the camera, it is difficult to fundamentally reduce the bottom layer of the camera, the initialization work such as powering on the camera, the configuration of the camera image data, and the waiting for the output of the camera. The time-consuming ratio of data during the entire camera startup process, because the bottom layer of the camera must wait for the camera startup request to be issued before completing the initialization work such as powering on the camera, configuring the camera image data, and waiting for the camera to output data. The startup operation of the camera. Therefore, the embodiment of the present invention proposes a method for quickly starting the camera of the mobile terminal, to quickly start the camera of the mobile terminal with the idea of reducing image data configuration time (that is, shortening the memory space application and allocation time).

It should be noted that the embodiment of the present invention only describes the improvement process of image data application and allocation of memory space of the camera during the camera startup process, and does not describe other operation steps of the camera during the camera startup process in detail, because based on the present invention The embodiment describes the improvement steps of applying for and allocating the memory space of the image data of the camera, combined with other operations in the existing camera startup process, those skilled in the art can realize the quick startup of the mobile terminal camera.

Embodiment one

FIG. 1 is a schematic flowchart of a method for quickly starting a camera of a mobile terminal according to Embodiment 1 of the present invention. The method is applicable to the situation of starting the camera in the mobile terminal, and can be executed by a device for quickly starting the camera of the mobile terminal, wherein the device can be implemented by software and/or hardware, and is generally integrated in the mobile terminal.

Specifically, as shown in FIG. 1, a method for quickly starting a mobile terminal camera provided by Embodiment 1 of the present invention includes the following operations:

Step S101, after receiving the mobile terminal camera startup request, read the memory allocation information saved in the specified file.

Step S102. Allocate the memory space pointed to in the memory allocation information to the camera for image data caching.

In the above operation steps of this embodiment, the mobile terminal is an electronic device such as a mobile phone, a tablet computer, etc. that is provided with a camera and has a camera function. The process of receiving the mobile terminal camera activation request can be simply described as: the user performs a trigger operation on the camera icon on the mobile terminal or other quick activation camera icons, thereby forming a camera activation request.

In this embodiment, after receiving the mobile terminal camera activation request, the memory allocation information for the image data cache of the camera can be directly read. Correspondingly, the memory allocation information is saved in a specified file, and the specified file is a file set in advance for storing the memory allocation information. Further, the memory allocation information mainly includes a memory address, and the memory address can point to the memory space used to cache the image data of the camera, so that it is no longer necessary to repeat the memory application, and the memory address can be directly pointed to The memory space of the camera completes the memory space allocation of the image data of the camera. It should be noted that the memory address included in the memory allocation information can be one or more, and the number of memory addresses corresponds to the number of image data that needs to be cached, that is, one image data that needs to be cached corresponds to one memory address , and since the memory address points to the memory space, the operation of allocating the memory address for the image data is easily realized.

Generally, when the camera is started, it is often necessary to allocate memory space for more than 10 image data, and these image data can generally be used to configure the process or framework in the image signal processing (ImageSignalProcessing, ISP) process, or to start the camera output Image preview data.

Further, the image data includes: preview data of the camera based on the camera and/or shooting data of the camera based on the camera.

In this embodiment, the image data can be summarized into two types, one is the preview data of the camera based on the camera, and the preview data can be specifically understood as, after the camera starts and enters the camera display interface, the user displays the image on the screen of the mobile terminal The image data information seen based on the camera, these preview data can be changed on the screen of the mobile terminal with the movement of the camera; the other is the shooting data based on the camera, which can be specifically understood as entering the After the camera displays the interface, the user obtains the desired preview data through the camera and clicks the shooting button to obtain the image data information. These image data can be finally stored in the corresponding photo or video folder of the mobile terminal.

Implementation 1 of the present invention provides a method for quickly starting a mobile terminal camera. After receiving a camera startup request on a mobile terminal, read the memory allocation information stored in the specified file; and allocate the memory space pointed to in the memory allocation information Cache the camera image data for the camera. Using this method saves the need to repeat the application operation of the memory space for caching the image data of the camera each time after receiving the camera startup request, thereby saving 60ms to 80ms of time for applying for the memory space for the image data. Furthermore, the starting of the camera of the mobile terminal is accelerated, the time-consuming of starting the camera is reduced, and the user experience of the user on the mobile terminal is improved.

Embodiment two

FIG. 2 is a schematic flowchart of a method for quickly starting a camera of a mobile terminal provided by Embodiment 2 of the present invention. Embodiment 2 of the present invention is based on the above-mentioned embodiments, and further, the step "after receiving the mobile terminal camera startup request, read the memory allocation information stored in the specified file" is specifically optimized as follows: after receiving the camera startup request Afterwards, detecting whether the content stored in the specified file is empty; if the content stored in the specified file is not empty, then read the memory allocation information stored in the specified file. In addition, further optimization includes: after receiving the request for starting the camera, after detecting whether the content stored in the specified file is empty, if the content stored in the specified file is empty, then for the mobile terminal camera The image data is allocated for the application of the memory space.

Further, after the said if the content stored in the specified file is empty, after the memory space application allocation is performed for the image data of the mobile terminal camera, it also includes: reserving the application for caching the image data memory space, and save the memory address corresponding to the memory space to the specified file as the memory allocation information of the image data.

As shown in Figure 2, a method for quickly starting a mobile terminal camera provided by Embodiment 2 of the present invention specifically includes the following operations:

Step S201, receiving a camera start request.

In this embodiment, after the user triggers the camera icon or the camera shortcut key on the mobile terminal, a request for starting the camera may be generated.

Step S202, determine whether the content stored in the specified file is empty, if not, only execute step S203; if yes, execute step S204.

In this embodiment, the specified file is a file set in advance for storing memory allocation information. After the request in step S201, it may be determined based on step S202 whether the content in the specified file is empty, and if not, step S203 may be executed; otherwise, step S204 may be executed.

Step S203. Read the memory allocation information stored in the specified file, wherein the memory space pointed to by the memory allocation information is used for image data buffering of the camera.

In this embodiment, when it is determined that the content of the specified file is not empty, it can be known that memory allocation information has been stored in the specified file, then the memory allocation information can be directly read to use the memory allocation information based on the memory allocation information. The included memory address gets the memory space used to cache the image data. Based on this step, the time spent on memory space application and allocation of image data can be saved when the camera is started, thereby saving 60 ms to 70 ms of time in the entire process of camera start.

Step S204, applying for allocation of memory space for the image data of the camera of the mobile terminal.

In this embodiment, when it is determined that the content of the specified file is empty (generally after the mobile terminal is powered on, before starting the camera for the first time, after setting a static vector table as the specified file, the specified file is initialized. is empty), the memory space application allocation operation can be performed for the image data of the mobile terminal camera.

Further, the allocation of memory space for the image data of the mobile terminal camera includes:

Obtain the pixel size corresponding to the camera of the mobile terminal; determine the memory size required for caching the image data of the camera according to the pixel size; apply for and allocate corresponding memory space for the image data based on the memory size.

In this embodiment, when the image data of the camera of the mobile terminal is applied for allocation of memory space, the pixel size information of the camera of the mobile terminal can be obtained first (generally, the pixel information of the camera can be obtained by querying the mobile terminal The configuration information is obtained, and the configuration information is generally stored in the setting options of the mobile terminal); then, after obtaining the pixel size information of the camera, the memory size required for caching the image data of the camera can be determined based on the pixel size (generally Specifically, its memory size is the size of the pixel unit that the camera needs to store. For example, for a mobile terminal camera with 1.3 million pixels, when caching the image data of the camera, it needs to be able to store data with a size of 4208*3120 memory); finally, after obtaining the memory size required for caching the image data, it is necessary to apply for and allocate corresponding memory space for the image data based on the determined memory size. Thus, the memory space application and allocation operation for the image data of the camera is completed.

Step S205 , reserving the applied memory space for caching the image data, and saving the memory address corresponding to the memory space to the specified file as the memory allocation information of the image data.

In this embodiment, after completing the application and allocation of the image data memory space based on step S204, in order not to repeat the memory space application operation when starting the mobile terminal camera again in the future, it may be considered to directly allocate the applied memory space Reserve it so that the memory space that has been applied for can be used directly when the camera is started next time. Correspondingly, if only the allocated space is reserved, the bottom layer of the camera does not know which memory space is reserved for image data caching when the camera is started next time, so it is necessary to set an index file containing the memory address , so that the bottom layer of the camera can quickly find the corresponding memory space for caching image data based on the index file.

Specifically, the above-mentioned index file containing the memory address is equivalent to the specified file mentioned in step S205, that is, the memory address corresponding to the allocated memory space is stored in the specified file to form an indexable file. file, wherein the stored memory address information is the memory allocation information required by the bottom layer of the camera. Based on the description of memory allocation information in Embodiment 1, there may be more than one memory address for indexing, and the number of memory addresses is mainly based on the amount of image data to be cached. In addition, in order to ensure that the saved memory allocation information does not disappear with the exit of the camera application, it is necessary to set it as a static vector table when setting the above specified file. Since the static vector table does not disappear with the exit of the camera application, it is guaranteed The memory allocation information will not disappear with the exit of the camera application.

The second embodiment of the present invention provides a method for quickly starting the camera of a mobile terminal, which further specifies the process of obtaining memory space for the camera image data. First, after receiving the camera start request, it will determine whether the content in the pointing file is Empty, when it is not empty, you can directly determine the memory space corresponding to the image data based on the memory allocation information in the specified file; when it is empty, you need to apply for memory space allocation for the image data, and then the applied Good memory space for restarting the camera. Using this method saves the need to repeatedly execute the memory space application operation for caching the image data of the camera after receiving the camera startup request, thereby saving 60ms to 80ms of allocating and applying for memory space for image data time, thereby speeding up the startup of the mobile terminal camera.

Embodiment three

FIG. 3 is a schematic flowchart of a method for quickly starting a camera of a mobile terminal provided by an embodiment of the present invention. Embodiment 3 of the present invention is based on the above embodiments. In this embodiment, before receiving the mobile terminal camera startup request, it also includes: when the specified file does not exist, setting a static vector table as the specified file , and initialize the specified file to be empty to store the memory allocation information.

In addition, the second embodiment of the present invention further preferably includes: releasing the memory space for caching the image data and deleting the specified file when it is detected that the mobile terminal is powered off or restarted.

As shown in Figure 3, a method for quickly starting a mobile terminal camera provided by Embodiment 3 of the present invention specifically includes the following operations:

Step S301. When the specified file does not exist, set a static vector table as the specified file, and initialize the specified file to be empty to store the memory allocation information.

In this embodiment, step S301 provides a specific timing for setting the specified file. Preferably, before receiving the camera startup request and when the specified file does not exist, a static vector table may be created as the specified file. And when the static vector table is created, the static vector table is initialized to be empty, so as to facilitate subsequent operations.

Step S302, receiving a camera start request.

Step S303, determine whether the content stored in the specified file is empty, if not, only execute step S304; if yes, execute step S305.

Step S304. Read the memory allocation information stored in the specified file, wherein the memory space pointed to by the memory allocation information is used for image data buffering of the camera.

Step S305, apply for allocation of memory space for the image data of the camera of the mobile terminal.

Step S306, reserve the memory space that has been applied for to cache the image data, and save the memory address corresponding to the memory space to the specified file as memory allocation information of the image data.

In this embodiment, the operations of steps S302 to S306 will not be described in detail, and reference may be made to the specific description of the above steps in Embodiment 2.

Step S307, when it is detected that the mobile terminal is powered off or restarted, release the memory space used for caching the image data, and delete the specified file.

In this embodiment, since the memory size of the mobile terminal is limited, and the memory space for caching the image data of the camera is large when the camera of the mobile terminal is working, if the camera application exits and still retains the image data obtained by the above steps The acquired memory space will cause excessive occupancy of memory space resources of the mobile terminal, so that the mobile terminal cannot effectively allocate corresponding memory space for other functional applications, thereby possibly reducing the response rate of the mobile terminal to other application programs. Therefore, the embodiment of the present invention limits the release timing of the memory space, that is, when it is detected that the mobile terminal is shut down or restarted, the memory space required by the camera to cache the image data can be released; and After the memory space is released, the specified file is correspondingly deleted, so as to avoid unnecessary errors caused by not deleting the specified file when the camera is started again.

The third embodiment of the present invention provides a method for quickly starting the camera of a mobile terminal, which further optimizes the setting conditions of the specified file and the deletion conditions of the specified file, so that the specified file can store memory allocation information for camera startup, thereby reducing The allocation time of the memory space required for the image data when the camera starts shortens the camera start-up time by 60ms to 70ms; at the same time, based on the deletion conditions of the specified files, the reserved memory space can be released and the stored memory allocation information can be deleted. In this way, the memory space of the mobile terminal can be released, so as to avoid excessive occupation of the memory of the mobile terminal.

Embodiment Four

FIG. 4 is a structural block diagram of an apparatus for quickly starting a camera of a mobile terminal provided by Embodiment 4 of the present invention. The device can be implemented by software and/or hardware, and is suitable for quickly starting the camera in the mobile terminal, and is generally integrated in the mobile terminal. As shown in FIG. 4 , the specific structure of the device is as follows, including: an information reading module 41 and a memory allocation module 42 . in,

The information reading module 41 is configured to read the memory allocation information stored in the specified file after receiving the mobile terminal camera startup request.

The memory allocation module 42 is configured to allocate the memory space pointed to in the memory allocation information to the camera for image data caching.

In this embodiment, the device can read the memory allocation information stored in the specified file through the information reading module 41 after receiving the camera startup request, and use the memory allocation module 42 to complete the image data cache for the camera Allocation of memory space.

Further, the information reading module 41 is specifically used for:

After receiving the camera startup request, detect whether the content stored in the specified file is empty;

If the content stored in the specified file is not empty, then acquire the memory allocation information stored in the specified file.

Further, the image data includes: preview data of the camera based on the camera and/or shooting data of the camera based on the camera.

The fourth embodiment of the present invention provides a device for quickly starting the camera of a mobile terminal. After receiving the camera start request, it can save the process of repeatedly executing the application and allocation of the memory space for caching the image data of the camera, thereby It saves 60ms-80ms time for allocating and applying for memory space for image data, thereby speeding up the start-up of the mobile terminal camera, reducing the time-consuming of camera start-up, and improving the user experience of the mobile terminal.

Embodiment five

FIG. 5 is a structural block diagram of an apparatus for quickly starting a camera of a mobile terminal provided by Embodiment 5 of the present invention. Embodiment 5 of the present invention is optimized on the basis of Embodiment 4 above. In this embodiment, in addition to information reading module 51 and memory allocation module 52, the structure of the device also specifically includes: specified file setting module 50, memory space application module 53 , allocation information storage module 54 and space release module 55 . in,

Designated file setting module 50 is used to set a static vector table as the designated file when the designated file does not exist before receiving the mobile terminal camera startup request, and initialize the designated file to be empty to store the designated file. The above memory allocation information.

Memory space application module 53, is used for after receiving the request that camera starts, detects whether the content stored in the designated file is empty, when the content stored in the designated file is empty, for the image of the mobile terminal camera Data allocation for memory space application;

Correspondingly, the allocating the memory space application for the image data of the mobile terminal camera includes: obtaining the pixel size corresponding to the mobile terminal camera; memory size; based on the memory size, apply for and allocate corresponding memory space for the image data.

The allocation information storage module 54 is used to reserve the memory space for caching the image data that has been applied for after the memory space for caching image data is allocated for the mobile terminal camera when the content stored in the specified file is empty , and save the memory address corresponding to the memory space to the specified file as the memory allocation information of the image data.

The space release module 55 is configured to release the memory space for caching the image data and delete the specified file when it is detected that the mobile terminal is shut down or restarted.

In this embodiment, based on the device, at first the specified file setting module 50 can set a static vector table as the specified file and initialize the specified file when the specified file does not exist before receiving the mobile terminal camera startup request. The specified file is empty to store the memory allocation information used to obtain the image data cache space; then, after receiving the mobile terminal camera startup request, the information reading module 51 can detect that the content stored in the specified file is not When it is empty, read the memory allocation information preserved in the specified file; or after receiving the mobile terminal camera startup request by the memory space application module 53, when detecting that the content stored in the specified file is empty, the mobile terminal The image data of the camera carries out the application allocation of the memory space; and the allocated memory space for caching the image data is reserved by the allocation information preservation module 54, and the memory address corresponding to the memory space is saved to the specified file, as the memory allocation information of the image data; finally, the space release module 55 can also be used to release the memory space for caching the image data when detecting that the mobile terminal is shut down or restarted, and delete the Specify the file.

The device for quickly starting the camera of a mobile terminal provided by the present invention further adds a specified file setting module, a memory space application module, an allocation information storage module and a space release module. This enables the device in the embodiment of the present invention to determine the timing of memory application and allocation for the image data of the camera, and also determine the timing of releasing the reserved memory space. The device can not only save the allocation time of the memory space required by the image data when the camera is started, shorten the camera start-up time by 60ms to 70ms to achieve the effect of quickly starting the camera; at the same time, it also avoids excessive occupation of the memory of the mobile terminal.

Furthermore, Embodiment 5 of the present invention also provides a mobile terminal, which integrates any device for quickly starting the camera of the mobile terminal provided in Embodiment 4 or Embodiment 5 of the present invention. With this mobile terminal, when the user clicks the camera icon or the camera shortcut key, compared with the existing mobile terminal, the start-up time can be shortened by 60ms to 70ms, achieving the effect of quickly starting the camera of the mobile terminal, thereby further improving the user's awareness of The experience effect of mobile terminals.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (15)

1. A method for quickly starting a mobile terminal camera, characterized in that, comprising: After receiving the mobile terminal camera startup request, read the memory allocation information saved in the specified file; Allocating the memory space pointed to in the memory allocation information to the camera for image data caching. 2. The method according to claim 1, wherein after receiving the mobile terminal camera startup request, reading the memory allocation information stored in the specified file includes: After receiving the camera startup request, detect whether the content stored in the specified file is empty; If the content stored in the specified file is not empty, read the memory allocation information stored in the specified file. 3. The method according to claim 2, characterized in that, after receiving the request to start the camera, after detecting whether the content stored in the specified file is empty, further comprising: If the content stored in the specified file is empty, then apply for allocation of memory space for the image data of the mobile terminal camera; Correspondingly, the allocation of memory space for the image data of the mobile terminal camera includes: Obtain the pixel size corresponding to the camera of the mobile terminal; According to the pixel size, determine the memory size required for caching the image data of the camera; Applying for and allocating corresponding memory space for the image data based on the memory size. 4. The method according to claim 3, characterized in that, if the content stored in the specified file is empty, after the image data of the mobile terminal camera is allocated for the application of the memory space, it also includes: Reserve the applied memory space for caching the image data, and save the memory address corresponding to the memory space to the specified file as the memory allocation information of the image data. 5. The method according to any one of claims 1-4, characterized in that, before receiving the mobile terminal camera startup request, further comprising: When the specified file does not exist, a static vector table is set as the specified file, and the specified file is initialized to be empty to store the memory allocation information. 6. The method according to any one of claims 1-4, further comprising: When it is detected that the mobile terminal is shut down or restarted, the memory space used for caching the image data is released, and the specified file is deleted. 7. The method according to claim 6, wherein the image data comprises: preview data of the camera based on the camera and/or shooting data of the camera based on the camera. 8. A device for quickly starting a mobile terminal camera, characterized in that it comprises: The information reading module is used to read the memory allocation information stored in the specified file after receiving the mobile terminal camera startup request; A memory allocation module, configured to allocate the memory space pointed to in the memory allocation information to the camera for image data caching. 9. The device according to claim 8, wherein the information reading module is specifically used for: After receiving the camera startup request, detect whether the content stored in the specified file is empty; If the content stored in the specified file is not empty, then acquire the memory allocation information stored in the specified file. 10. The device according to claim 9, further comprising: The memory space application module is used to receive the request for starting the camera and detect whether the content stored in the specified file is empty, and when the content stored in the specified file is empty, the image data of the camera of the mobile terminal Apply for allocation of memory space; Correspondingly, the allocation of memory space for the image data of the mobile terminal camera includes: Obtain the pixel size corresponding to the camera of the mobile terminal; According to the pixel size, determine the memory size required for caching the image data of the camera; Applying for and allocating corresponding memory space for the image data based on the memory size. 11. The device according to claim 10, further comprising: The allocation information saving module is used to reserve the memory space for caching the image data that has been applied for after the memory space for caching the image data is allocated to the camera of the mobile terminal when the content stored in the specified file is empty, And saving the memory address corresponding to the memory space to the specified file as the memory allocation information of the image data. 12. The device according to any one of claims 8-11, further comprising: The specified file setting module is used to set a static vector table as the specified file when the specified file does not exist before receiving the mobile terminal camera startup request, and initialize the specified file to be empty to store the specified file. Memory allocation information. 13. The device according to any one of claims 8-11, further comprising: The space release module is configured to release the memory space used for caching the image data and delete the specified file when it is detected that the mobile terminal is shut down or restarted. 14. The device according to claim 13, wherein the image data comprises: preview data of the camera based on the camera and/or shooting data of the camera based on the camera. 15. A mobile terminal, characterized in that the mobile terminal integrates the device for quickly starting the camera of the mobile terminal according to any one of claims 8-14.