CN101312519B - Data frame processing method and device - Google Patents

Abstract

Embodiments of the present invention provide a data frame processing method and device. The method includes occupying system resources within the decoding mode time, preprocessing N data frames, and storing the preprocessing results in the playback buffer, where N is an integer greater than 1 and less than or equal to the maximum decoding number; the decoding mode After the time is over, switch from decoding mode to sleep mode to release system resources; before the end of sleep mode time, receive a sleep wake-up command and switch from sleep mode to decoding mode. On the premise of ensuring that the user's audio-visual experience is not affected, system resources are occupied during the decoding mode time to perform centralized decoding processing of multiple data frames, and then system resources are released to enter sleep mode to play the previously preprocessed data frames and make the CPU and related Devices and peripherals enter a low-power mode, which greatly reduces the dynamic power consumption of the system when running the media player, prolongs the standby time of the device, and improves the quality of service.

Description

Data frame processing method and device

technical field

The embodiments of the present invention relate to the technical field of data processing, and in particular, to a data frame processing method and device.

Background technique

With the continuous development of system integration technology, the functions of embedded systems are becoming more and more powerful, and their applications are becoming more and more extensive. Nowadays, embedded systems have been integrated into people's lives, such as personal digital assistants, music phones, MP3/MP4 players, etc. As the market continues to increase the size and performance requirements of mobile portable devices, the contradiction between the small size, high performance and limited battery capacity of embedded devices has become an urgent problem to be solved.

MP3 audio playback and MP4 video playback services are the main services frequently used by users. The media player in the prior art portable terminal is a design scheme based on a multi-tasking system, wherein the main control task is responsible for capturing and receiving, and processing front-end user commands. It is also responsible for feeding back the current state of the media player; the demultiplexing task is responsible for reading and parsing the media data content from the file, and completing the extraction of audio and video media data; the decoding task is responsible for encoding the media data according to the encoding task of the specific media data Carry out the corresponding decoding transformation and related post-processing tasks; the Render task is responsible for completing the audio and video synchronization work, and calls the audio driver interface and video driver interface to complete the playback of audio data and video data.

Fig. 1 is the flow chart of data frame processing of the existing media player, as shown in Fig. 1, the existing media player system is an asynchronous system, after completing the demultiplexing and decoding processing of a data frame, the data frame is directly processed , and demultiplex and decode the next data frame while playing the previous data frame, and so on, there is no strict correspondence between multiple tasks running concurrently.

Fig. 2 is the corresponding relation of existing media player state machine, as shown in Fig. 2, wherein when not starting media player, be in idle (IDLE) state; When receiving the start media player task, when finishing equipment initialization, Enter the READY state, ready to play audio and video media files; enter the decoding and playing (PLAY) state when receiving the user's play command, and start the continuous media data frame demultiplexing, decoding and playing work; when receiving the user's pause command Enter the interrupt (PAUSE) state, and suspend the media playback task. Fig. 3 is the schematic diagram of consumption of media power consumption of existing media player, as shown in Fig. 3, horizontal axis represents duration, and vertical axis represents the power consumption of consumption, when existing media player plays, ml corresponds to media player being in In the READY state, after receiving the playback command, it enters the decoding and playback (PLAY) state in the m2 corresponding figure, and the CPU runs at full speed until the work of the media player is completed.

The inventor finds in the process of realizing the present invention: when the existing media player plays the media data frame rate, it will frequently read the media files, and the files are mostly stored in peripherals such as SD cards, flash memory (Flash) or micro-hard disks, resulting in Frequent access to peripherals, poor performance and high power consumption; media file parsing, decoding and other tasks will be frequently started, resulting in high power consumption; there are also devices using Dynamic Voltage Frequency Scale (hereinafter referred to as: DVFS) In this case, due to continuous and rapid changes in the CPU load, the CPU will frequently perform DVFS switching, which consumes switching energy and time. In short, the current working mode of the media player will lead to high energy consumption of the equipment, which will affect the quality of service.

Contents of the invention

The embodiment of the present invention provides a data frame processing method and device, which are used to solve the defects of relatively large power consumption when the player performs media playback in the prior art, realize the reduction of dynamic power consumption when the system runs the media player, and improve the quality of service .

An embodiment of the present invention provides a data frame processing method, including:

Occupy system resources within the decoding mode time, preprocess N data frames, and store the preprocessing results in the playback buffer, where N is an integer greater than 1 and less than or equal to the maximum number of decodings, and the maximum number of decodings is the same as The size of the memory space of the playback buffer is suitable;

After the decoding mode time is over, switch from the decoding mode to the sleep mode, and release the system resources;

Before the sleep mode time is over, receive a sleep wakeup command to switch from sleep mode to decoding mode.

An embodiment of the present invention provides a data frame processing device, including:

The decoding processing module is used to occupy system resources within the decoding mode time, preprocess N data frames, and store the preprocessing results in the playback buffer, where N is an integer greater than 1 and less than or equal to the maximum decoding number, The maximum number of decodes is adapted to the size of the memory space of the playback buffer;

A switching control module, configured to switch from the decoding mode to the sleep mode after the decoding mode time ends, and release the system resources;

The sleep control module is configured to receive a sleep wake-up instruction and switch from the sleep mode to the decoding mode before the end of the sleep mode time.

The data frame processing method and device provided by the embodiments of the present invention, under the premise of ensuring that the user's audio-visual experience is not affected, occupy system resources within the time of decoding mode to perform centralized decoding processing of multiple data frames, and then release system resources to go to sleep Mode, play the previously preprocessed data frame, and make the CPU and related devices and peripherals enter the low power consumption mode, thereby greatly reducing the dynamic power consumption when the system runs the media player, prolonging the standby time of the device and improving the quality of service .

Description of drawings

Fig. 1 is the processing flowchart of existing media player data frame;

Fig. 2 is the correspondence relation of existing media player state machine;

FIG. 3 is a schematic diagram of media power consumption of an existing media player;

4 is a flowchart of an embodiment of the data frame processing method of the present invention;

5 is a schematic diagram of a system state machine of a media player in an embodiment of a data frame processing method of the present invention;

6 is a schematic diagram of the power consumption of the media player in the embodiment of the data frame processing method of the present invention;

7 is a schematic structural diagram of Embodiment 1 of the data frame processing device of the present invention;

FIG. 8 is a schematic structural diagram of Embodiment 2 of the data frame processing device of the present invention.

Detailed ways

The technical solutions of the embodiments of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

In the low power consumption optimization design of the embodiment of the present invention, the system is designed as a synchronous system, and a relatively strict synchronous time is maintained between each task to ensure that within a relatively fixed time interval, the central processing unit (CPU for short) ) and/or Digital Signal Processor (Digital Signal Processor, DSP) to concentrate on processing data-intensive computing tasks, and can perform relatively long-term media playback.

Fig. 4 is a flow chart of an embodiment of the data frame processing method of the present invention, as shown in Fig. 4, the method includes the following steps:

Step 100, occupying system resources within the decoding mode time, preprocessing N data frames, and storing the preprocessing results in the playback buffer, where N is an integer greater than 1 and less than or equal to the maximum decoding number;

During the normal media playing process of the media player, the working mode of the media player is divided into two working states, one working state is the decoding mode, and the other working state is the sleep mode; further, it works in the decoding mode. The time period in the mode is called the decoding mode time, and the time period in the sleep mode is called the sleep mode time. Wherein the so-called decoding mode working state is that within the decoding mode time, the media player occupies system resources, that is, CPU and/or DSP resources and other related resources are used to preprocess the data frame, and the preprocessing process includes: for audio Or pure video, including demultiplexing from files, decoding processing, post-processing, volume adjustment or resampling processing, etc., where post-processing includes EQ-balance adjustment for audio; for video playback, including deblocking, YUV to RGB Conversion, rotation or scaling and other processing and playback operations; for videos with audio and sound, on the basis of the above operations, operations such as audio and video synchronization processing are also included. And the preprocessed result information is stored in the playback buffer, so that the playback task of the media player can obtain data therefrom for media information, such as continuous playback of audio or video. When the media player is in the decoding mode, the system is in a high power consumption state because system resources are occupied and running at high speed.

When the media player is in a steady state, it should preprocess as many data frames as possible within the decoding mode time, but the number of preprocessed data frames has a certain limit, that is, it cannot be greater than the maximum number of decoding, so The number of preprocessed data frames should be greater than 1 and less than or equal to the maximum number of decodes. This maximum number of decodes should be compatible with the size of the memory space of the play buffer of the system. Take the preprocessing of multiple data frames corresponding to the maximum number of decodes as an example.

Step 101, after the decoding mode time is over, switch from the decoding mode to the sleep mode, and release the system resources;

After the media player occupies system resources for centralized decoding processing of multiple data frames, that is, after the decoding mode time is over, the media player should switch from the decoding mode to the sleep mode. When the media player is in the sleep mode, the system must be released. The resource is to release the occupation of the CPU and/or DSP and related resources, and inform the CPU and/or DSP that there is no processing work such as decoding for the time being. At this time, the CPU can enter the low power consumption mode when there are no other processing tasks. The specific CPU and/or DSP low power consumption mode includes "Clock gating", that is, the CPU and/or DSP shuts down the clock. Since the CPU has no clock at this time, the power consumption at this time is less than 10% of the normal operation; CPU and/or The DSP low power consumption mode also includes "Power Gating", which is to power off the CPU and/or DSP. At this time, there is no leakage current. The low power consumption of the specific CPU should also consider other system constraints such as power partitions.

When the media player is in the sleep mode, the media player no longer performs data frame decoding and other processing during the sleep mode, but performs continuous processing of the data frame preprocessing result information in the playback buffer under the action of the playback task. , and continues until the media player switches back to decoding mode. Since the media player works in the sleep mode, it does not occupy system resources for preprocessing operations such as reading, demultiplexing, decoding and synchronizing file data frames, thus reducing the power consumption of the system and saving the power of the device. In order to prolong the standby time of the device, the media player can be in sleep mode for a long time and in decoding mode for a short time, that is to say, the ratio of sleep mode time to decoding mode time should be as large as possible. Under the premise of ensuring continuous media playback, make the media player in the sleep mode with low system power consumption for a long period of time, and in the decoding mode with high system power consumption in a short period of time to reduce power consumption; but due to Affected by factors such as hardware equipment and software processing speed, and to ensure the continuity of media playback without affecting user experience, there are certain restrictions on sleep mode time and decoding mode time.

Specifically, the sleep mode time can be set as follows: due to the constraints of the product design of terminals with media player functions such as music phones and MP3 devices, the memory space of the playback buffer is fixed, so the media player is performing media playback. It is limited by the size of the playback buffer, and the maximum number of data frame information that can be stored in the playback buffer is fixed, and the maximum value is the aforementioned maximum decoding number. The maximum value of the sleep mode time is the time it takes to play all the multiple data frames corresponding to the maximum decoding number in the playback buffer. Moreover, the time it takes to play a data frame of one type is fixed, and the maximum decoding number restricted by the size of the playback buffer is also fixed, so the sleep mode time is also fixed. For example, the playback time of each data frame of an MP3 file is fixed at T1=26ms, and the maximum decoding number corresponding to a device with a media player is 100, then the maximum sleep mode time is 100*26ms or 2600ms. The setting of the decoding mode time is as follows: After the equipment hardware and software are designed, the time used to preprocess a type of data frame is called the frame processing time T2, which is correspondingly fixed, and T2 is much smaller than T1; Moreover, 100 data frames corresponding to the maximum decoding number need to be preprocessed within the decoding time, so the maximum decoding mode time is T2*100.

Step 102, before the sleep mode time ends, receive a sleep wake-up instruction, and switch from the sleep mode to the decoding mode.

In order to ensure the continuous playback of the entire media file, the media player should switch between the decoding mode and the sleep mode, that is, it will enter the decoding mode when the sleep mode time ends, and switch to the decoding mode to process the next data frame. Decoding processing. In order not to interrupt the playback of media files, there must always be data available for playback in the playback buffer. Therefore, before the end of the sleep mode time, the decoding mode should be performed in advance to decode data frames to ensure that the previously stored data in the playback buffer Store the new decoded data into the playback buffer before the data playback is complete. The early entry of the media player into the decoding mode can be triggered by a call from a third party, that is, when the media player switches from the decoding mode to the sleep mode, the timer receives the time information of the sleep mode; Send the sleep wake-up command when the sleep wake-up time is less than the sleep mode time, and send the sleep wake-up command to the media player before the sleep mode time ends, because processing sleep and wake-up also requires additional time overhead, so It should be further ensured that the sum of the sleep wake-up time and the time required to switch from sleep mode to decoding mode is less than the sleep mode time, and the media player switches from sleep mode to decoding mode after receiving the sleep wake-up command sent by the timer, and repeats before The preprocessing of multiple data frames corresponding to the maximum decoding number is described, and the decoding processing results such as PCM codes are stored in the playback buffer for cyclic playback. The sleep wake-up command received by the media player may also be the sleep wake-up command generated by user operation, for example, the user initiates a pause operation, and at this time, the CPU will first be woken up by an interrupt event such as a keyboard. The sleep wake-up instruction received by the media player may also be the sleep wake-up instruction generated by other external events, such as when an event reminder is due.

After executing step 102, continue to execute step 100 and step 101 in sequence, that is to say, the playing of the whole media file is performed in sequence according to step 100, step 101 and step 102, and loops until the media file playback ends.

In the data frame processing method provided by this embodiment, the sleep mode time should be obtained according to the maximum decoding number and the playback time attribute information of each data frame before the preprocessing of the data frame; The maximum decoding number and the time information of decoding each data frame are used to obtain the decoding mode time.

By optimizing the design of the media player and ensuring that the user's audio-visual experience is not affected, a synchronous system design method is adopted to concentrate on data processing-intensive tasks, and then let the CPU and related devices and peripherals enter low-power Power consumption mode, which greatly reduces the dynamic power consumption of the system when running the media player, prolongs the use time, and improves the quality of the server. On the premise of ensuring the high performance of the system, the power consumption of the portable terminal is effectively reduced. Since the present invention effectively reduces the unit power consumption of the media player, for the same power consumption index, a battery device with a lower nominal value can be selected, thereby further reducing the cost of the device.

In the method provided in this embodiment, when preprocessing the multiple data frames corresponding to the maximum number of decodings, the method of preprocessing the multiple data frames corresponding to the maximum number of decodings in batches can be used, specifically , divide multiple data frames corresponding to the maximum decoding number into batches, occupy system resources and preprocess each batch of data frames under the control of the CPU. This avoids the delay caused by preprocessing multiple data frames corresponding to the maximum decoding number at one time, and it can also quickly replenish the playback buffer during the transition time from sleep mode to decoding mode. The data in the area ensures the continuity of media resource playback.

In addition, after the media player receives the playback instruction information, if the multiple data frames corresponding to the maximum decoding number are preprocessed according to the decoding mode time in the steady state, the delay will be caused due to the large number of data frames. , it will not be able to enter the playback state for a period of time after the user sends the playback command, which affects the user's service quality. Therefore, after receiving the playback command information, a quick start mode should be adopted to make it enter a stable state smoothly, and a quick start process should be adopted It may be to receive the playback instruction information, preprocess the first number of data frames, obtain the preprocessing results of the first number of data frames, and store the preprocessing results of the first number of data frames into the playback buffer area; when the preprocessing results of the first number of data frames are played, the second number of data frames are preprocessed to obtain the preprocessing results of the second number of data frames, and the second number of The preprocessing result of the data frame is stored in the playback buffer, the second number is greater than the first number; the second number is used as the first number, the third number is used as the second number, and the third number greater than the second number, repeatedly performing preprocessing on the second number of data frames when the preprocessing results of the first number of data frames are played, to obtain the preprocessing results of the second number of data frames , and store the preprocessing results of the second number of data frames into the playback buffer. Specifically, in order to ensure fast startup and continuous and uninterrupted subsequent playback, the reading and demultiplexing of N1 data frame media (audio and video or audio and video data) can be performed first at the beginning, and the selection of N1 can be related to entering the decoding mode in advance Matching the advance time of the N1 data frame, you can choose 1 to 4 frames; then you can play the audio and video data. When playing the N1 data frame, read and demultiplex the N2 data frame according to the characteristics of the N1 data frame media file. , since the time for reading and demultiplexing one frame is much shorter than the time for playing one frame, it is necessary to satisfy N2>N1. After playing the N1 data frame, the N2 data frame is ready to ensure the continuous audio data Play; then read and demultiplex N3 frame data, and satisfy N3>N2; repeat the above process until the final preprocessed data reaches the number of decoded data frames required by the steady state. The media player is always playing the preprocessing result stored in the playback buffer.

By adopting the quick start mode, the media player can quickly enter the playing state of the media file in a relatively short period of time after receiving the playing instruction, thereby shortening the waiting time of the user and improving the service quality of the user.

Fig. 5 is a schematic diagram of the system state machine of the media player in the embodiment of the data frame processing method of the present invention. As shown in Fig. 5, the media player includes the following state machine:

(1) Idle (IDLE) state: it is in an idle state when the media player is not started;

(2) Ready (READY) state: When receiving the task of starting the media player, when the device initialization is completed, enter the ready state, ready to play audio and video media files;

(3) Decoding and playing (PLAY) state: the system continuously completes the processing of multi-frame media data;

(4) Quick start (QUICK START) state: It is a transient process that occurs after starting and before entering the decoding and playing state. The purpose is to prevent the user from entering the decoding and playing state at the beginning, which will cause the user to wait for a long time The output of audio and video files can only be obtained after the audio and video files, which affects the quality of service;

(5) Sleep (SLEEP) state: the CPU can be placed in a low-power working mode, and the peripherals not in use at this time can also enter the low-power mode; for example, the video decoding module used by the current media player is a hardware (chip IP or external chip), then this corresponding hardware can also enter the corresponding low power consumption mode; in this embodiment, the media player introduces a sleep state, which is used to rest for a long time with low power consumption of the system;

(6) Interruption (PAUSE) state: When receiving a pause command from the user, it enters the interruption state and suspends the media playing task.

Fig. 6 is a schematic diagram of the power consumption of the media player in the embodiment of the data frame processing method of the present invention. As shown in Fig. 6, the horizontal axis represents the duration, the vertical axis represents the consumed power consumption, and m21 and m22 represent new media players Corresponding to the new state, the media player is divided into two states m21 (corresponding to the PLAY state) and m22 (corresponding to the SLEEP state) when the media player is working normally. Play only, can work in a relatively low power consumption mode.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Fig. 7 is a schematic structural diagram of an embodiment of the data frame processing device of the present invention. As shown in Fig. 7, the device includes a decoding processing module 11, a switching control module 12 and a sleep control module 13, wherein the decoding processing module 11 is used to Occupy system resources within, carry out preprocessing to N data frame, and store the preprocessing result in playing buffer, described N is greater than 1, is less than or equal to the integer of maximum decoding number; Switching control module 12 is used for in described decoding After the mode time ends, switch from the decoding mode to the sleep mode to release the system resources; the sleep control module 13 is used to receive a sleep wake-up instruction before the sleep mode time ends, and switch from the sleep mode to the decoding mode.

Specifically, the data frame processing device described in this embodiment can be a media player. When the media player is in the playing state of a media file, the decoding processing module 11 occupies system resources during the decoding mode time. Complete the preprocessing of multiple data frames under control, the number of multiple data frames should be greater than 1 and less than or equal to the maximum decoding number, and store the preprocessed result information in the playback buffer for playback. This embodiment Take the preprocessing of multiple data frames corresponding to the maximum decoding number as an example to illustrate; when the decoding mode time is over, the media player switches from the decoding mode to the sleep mode, and releases the previously occupied system resources at this time; the media player The device enters the sleep mode, and the data in the playback buffer is played, and the system is in a low power consumption state; in order to ensure the continuity of the media file playback, before the sleep mode time ends, the sleep control module 13 will receive the sleep wake-up instruction, and the media playback The processor switches from sleep mode to decoding mode and continues preprocessing of multiple data frames.

The data frame processing device provided in this embodiment, on the premise of ensuring that the user's audio-visual experience is not affected, occupies system resources for centralized preprocessing of multiple data frames during the decoding mode time, and then releases system resources to enter sleep mode, playing the previously previewed frame. Processed data frames, and make the CPU and related devices and peripherals enter low power consumption mode, thereby greatly reducing the dynamic power consumption when the system runs the media player, prolonging the standby time of the device, and improving the service quality.

FIG. 8 is a schematic structural diagram of Embodiment 2 of the data frame processing device of the present invention. As shown in FIG. A batch control submodule 111 and a decoding processing submodule 112, wherein the batch control submodule 111 is used to batch a plurality of data frames corresponding to the maximum decoding number, and control the number of preprocessed data frames per batch ; The decoding processing sub-module 112 is used to preprocess each batch of data frames. In order to reduce the delay and ensure the continuity of the media file playback, the decoding processing module 11 adopts a method of preprocessing a plurality of data frames corresponding to the maximum decoding number in batches, and the batch control submodule 111 controls the media player every The number of data frames read from the media file, demultiplexed, etc., the decoding processing submodule 112 preprocesses each batch of data frames; by analogy, several batches of data frames are preprocessed to complete A preprocessing process for multiple data frames corresponding to the maximum number of decodes.

This data frame processing device embodiment may also include a sleep mode time acquisition module 16 and a decoding mode time acquisition module 17, wherein the sleep mode time acquisition module 16 is used to obtain Sleep mode time; decoding mode time acquisition module 17 is used to obtain the decoding mode time according to the maximum decoding number and the time information of preprocessing each data frame. The decoding processing module 11 carries out the preprocessing of the data frame within the decoding mode time obtained by the decoding mode time acquisition module 17; the sleep control module 13 releases system resources within the sleep mode time obtained by the sleep mode time acquisition module 16, so that the CPU is in sleep state .

The sleep wake-up instruction received by the sleep control module 13 may be sent by a timer, or a sleep wake-up instruction may be generated due to a new command given by the user, for example, the user initiates a pause operation or other external events. The data frame processing device in this embodiment also includes a timer 14, which is used to receive the sleep mode time information when switching from the decoding mode to the sleep mode, start timing, and send a sleep wakeup instruction when the sleep wakeup time is reached, so The sum of the sleep wake-up time and the time required to switch from the sleep mode to the decoding mode is less than the sleep mode time. The data frame processing device also includes a playback module 15 for playing the preprocessing result stored in the playback buffer. The timer 14 starts counting when the data frame processing device switches from the decoding mode to the sleep mode, and sends a sleep wake-up instruction to the data frame processing device before the end of the sleep mode time to wake up the data frame processing device, occupying system resources for multiple The preprocessing process of the data frame. The playback module 15 in the data frame processing device is responsible for invoking data from the playback buffer to play media information after the data frame processing device enters the playback state.

Further, after the media player receives the play instruction information, if the multiple data frames corresponding to the maximum decoding number are preprocessed according to the decoding mode time in the steady state, the delay will be caused due to the large number of data frames , within a certain period of time after the user sends the play instruction, it will not be able to enter the play state, which affects the quality of service for the user. A quick start processing module 18 may be included for completing the quick start function of the media player. The quick start processing module 18 is used to receive the playback instruction information, preprocess the first number of data frames, obtain the preprocessing results of the first number of data frames, and store the preprocessing results of the first number of data frames into the playback buffer; when the preprocessing results of the first number of data frames are played, the second number of data frames are preprocessed to obtain the preprocessing results of the second number of data frames, and The preprocessing results of the second number of data frames are stored in the playback buffer, the second number is greater than the first number; the second number is used as the first number, and the third number is used as the second number, The third number is greater than the second number, and repeatedly performing the preprocessing on the second number of data frames when playing the preprocessing results of the first number of data frames to obtain the second number of Preprocessing results of the data frames, and storing the preprocessing results of the second number of data frames in the playback buffer. Specifically, in order to ensure fast startup and continuous and uninterrupted subsequent playback, the reading and demultiplexing of N1 data frame media (audio and video or audio and video data) can be performed first at the beginning, and the selection of N1 can be related to entering the decoding mode in advance Matching the advance time of the N1 data frame, you can choose 1 to 4 frames; then you can play the audio and video data. When playing the N1 data frame, read and demultiplex the N2 data frame according to the characteristics of the N1 data frame media file. , since the time for reading and demultiplexing one frame is much shorter than the time for playing one frame, it is necessary to satisfy N2>N1. After playing the N1 data frame, the N2 data frame is ready to ensure the continuous audio data Play; then read and demultiplex N3 frame data, and satisfy N3>N2; repeat the above process until the final preprocessed data reaches the number of decoded data frames required by the steady state. The media player is always playing the preprocessing result stored in the playback buffer.

The data frame processing device provided in this embodiment adopts a synchronous system design method on the premise of ensuring that the user's audio-visual experience is not affected, and concentrates on data processing-intensive tasks, and then allows the CPU and related devices and peripherals to enter the low Power consumption mode, which greatly reduces the dynamic power consumption when the system runs the media player, prolongs the use time and improves the service quality.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (9)

1. A data frame processing method, characterized in that comprising: Receiving playback instruction information, performing preprocessing on the first number of data frames, obtaining preprocessing results of the first number of data frames, and storing the preprocessing results of the first number of data frames into the playback buffer; When playing the preprocessing results of the first number of data frames, preprocessing the second number of data frames to obtain the preprocessing results of the second number of data frames, and storing the second number of data frames The frame preprocessing result is stored in the playback buffer, and the second number is greater than the first number; Taking the second number as the first number, taking the third number as the second number, and the third number is greater than the second number, repeating the playing of the preprocessing results of the first number of data frames , preprocessing the second number of data frames to obtain the preprocessing results of the second number of data frames, and storing the preprocessing results of the second number of data frames into the playback buffer; Occupy system resources within the decoding mode time, preprocess N data frames, and store the preprocessing results in the playback buffer, where N is an integer greater than 1 and less than or equal to the maximum number of decodings, and the maximum number of decodings is the same as The size of the memory space of the playback buffer is suitable; After the decoding mode time is over, switch from the decoding mode to the sleep mode, and release the system resources; Before the end of the sleep mode time, receive the sleep wake-up command and switch from the sleep mode to the decoding mode; Wherein, the sleep mode time is obtained according to the maximum decoding number and the playback time attribute information of each data frame; The decoding mode time is obtained according to the maximum number of decodings and time information for preprocessing each data frame. 2. The data frame processing method according to claim 1, wherein said preprocessing of a plurality of data frames corresponding to the maximum number of decoding comprises: Perform preprocessing on multiple data frames corresponding to the maximum decoding number in batches. 3. The data frame processing method according to claim 1, wherein said receiving sleep wake-up instruction comprises: Receive the sleep wake-up command sent by the timer; or Receive sleep wake-up instructions generated by user operations or other external events. 4. the data frame processing method according to claim 3, is characterized in that described method also comprises: When switching from the decoding mode to the sleep mode, the timer receives the sleep mode time information; The timer starts timing, and sends the sleep wake-up instruction when the sleep wake-up time is reached, and the sum of the sleep wake-up time and the time required for switching from the sleep mode to the decoding mode is less than the sleep mode time. 5. The data frame processing method according to claim 1, further comprising: and playing the preprocessing result stored in the playing buffer. 6. A data frame processing device, characterized in that comprising: The quick start processing module is used to receive the playback instruction information, preprocess the first number of data frames, obtain the preprocessing results of the first number of data frames, and store the preprocessing results of the first number of data frames into the playback buffer; when the preprocessing results of the first number of data frames are played, the second number of data frames are preprocessed to obtain the preprocessing results of the second number of data frames, and The preprocessing results of the second number of data frames are stored in the playback buffer, the second number is greater than the first number; the second number is used as the first number, and the third number is used as the second number, The third number is greater than the second number, and repeatedly performing the preprocessing on the second number of data frames when playing the preprocessing results of the first number of data frames to obtain the second number of The preprocessing result of the data frame, and storing the preprocessing result of the second number of data frames in the playback buffer; The decoding processing module is used to occupy system resources within the decoding mode time, preprocess N data frames, and store the preprocessing results in the playback buffer, where N is an integer greater than 1 and less than or equal to the maximum decoding number, The maximum number of decodes is adapted to the size of the memory space of the playback buffer; A switching control module, configured to switch from the decoding mode to the sleep mode after the decoding mode time ends, and release the system resources; The sleep control module is used to receive a sleep wake-up instruction before the end of the sleep mode time, and switch from the sleep mode to the decoding mode; The sleep mode time acquisition module is used to obtain the sleep mode time according to the maximum decoding number and the playback time attribute information of each data frame; The decoding mode time acquisition module is configured to obtain the decoding mode time according to the maximum decoding number and time information for preprocessing each data frame. 7. The data frame processing device according to claim 6, wherein the decoding processing module comprises: The batch control sub-module is used to batch a plurality of data frames corresponding to the maximum decoding number, and control the number of preprocessed data frames in each batch; The decoding processing sub-module is used for preprocessing each batch of data frames. 8. The data frame processing device according to claim 6 or 7, further comprising: The timer is used to receive the sleep mode time information when switching from the decoding mode to the sleep mode, start counting, and send the sleep wake-up instruction when the sleep wake-up time is reached, and the sleep wake-up time is the same as switching from the sleep mode The sum of the time required to reach the decoding mode is less than the sleep mode time. 9. The data frame processing device according to claim 6, further comprising: A playing module, configured to play the preprocessing result stored in the playing buffer.

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