CN110730364B - Cloud mobile phone data transmission method and device and storage medium - Google Patents
Cloud mobile phone data transmission method and device and storage medium Download PDFInfo
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 43
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- 238000004590 computer program Methods 0.000 claims description 6
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
Abstract
The invention discloses a cloud mobile phone data transmission method, which comprises the following steps: acquiring video frame data in a framebuffer readable state according to the screenshot thread, and copying the video frame data to a preset video frame pile; pushing the video frame pile into a video frame queue, and sending a notification message to a code pressing thread through a pipeline; after receiving the notification message, the code pressing thread takes out video frame data corresponding to a preset video frame stack from the video frame queue, and encodes the video frame data according to an encoder to generate video data to be transmitted; and returning the preset video frame pile to the video frame queue. According to the cloud mobile phone data transmission method, the cloud mobile phone data transmission device and the storage medium, data transmission processing can be performed on data through double threads, processing time is preferentially reduced, meanwhile, the memory space of a system can be optimized, and therefore the data transmission efficiency can be effectively improved.
Description
Technical Field
The invention relates to the technical field of data transmission, in particular to a cloud mobile phone data transmission method, a cloud mobile phone data transmission device and a storage medium.
Background
In the traditional method, a screen RGB image of the cloud mobile phone is intercepted through a single thread, and then the image is compressed into H264 format data for video transmission.
The transmission of video data using conventional techniques has the following problems: the screenshot and the image are compressed and scaled on a single thread, so that great time cost is generated, and the real-time property of data transmission cannot be guaranteed; the existing processing method is to do the screenshot and the image zooming on two threads, so that the processing time is reduced, but because the time complexity of the screenshot is far lower than the complexity of image compression, a code compression thread just compresses one frame of image, and the screenshot thread intercepts four or five frames of images to a memory; these four-five frames have very high content coincidence, so the value of these several frames will be small, which will cause memory waste and even overflow for a long time.
Disclosure of Invention
The embodiment of the invention provides a cloud mobile phone data transmission method, a cloud mobile phone data transmission device and a storage medium, which can optimize the memory space of a system while reducing the processing time, so that the data transmission efficiency can be effectively improved.
In one aspect, an embodiment of the present invention provides a cloud mobile phone data transmission method, including:
acquiring video frame data in a framebuffer readable state according to a screenshot thread, and copying the video frame data to a preset video frame pile;
pushing the video frame pile into a video frame queue, and sending a notification message to a code pressing thread through a pipeline;
after receiving the notification message, the code pressing thread takes out video frame data corresponding to a preset video frame stack from the video frame queue, and encodes the video frame data according to an encoder to generate video data to be transmitted;
and returning the preset video frame pile to the video frame queue.
Further, before the step "the screenshot thread obtains the video data to be transmitted in a frame buffer readable state by a multiplexing method, and copies the video data to be transmitted to a preset video frame pile", the method further comprises the steps of:
the framebuffer receives the video frame data transmitted by the SurfaceFlinger and modifies the file descriptor into a readable state through the driving interface.
Further, the "acquiring, by the screenshot thread, video frame data in a framebuffer readable state, and copying the video frame data to a preset video frame heap", specifically includes:
the screenshot thread reads the readable state of the framebuffer in a multiplexing mode, and copies the video frame data of the framebuffer to a preset video frame pile according to the readable state.
Further, the encoding the video frame data according to the encoder to generate the video data to be transmitted specifically includes:
and coding the video frame data according to an X264 or VPU coder to generate the video data to be transmitted in the H264 data format.
On the other hand, another embodiment of the present invention provides a cloud mobile phone data transmission device, which includes a copy module, a notification module, an encoding module, and a return module;
the copying module is used for acquiring video frame data in a framebuffer readable state according to the screenshot thread and copying the video frame data to a preset video frame pile;
the notification module is used for pushing the video frame pile into a video frame queue and sending a notification message to a code pressing thread through a pipeline;
the encoding module is used for taking out video frame data corresponding to a preset video frame stack from the video frame queue after the code pressing thread receives the notification message, and encoding the video frame data according to an encoder to generate video data to be transmitted;
and the return module is used for returning the preset video frame piles to the video frame queue.
Further, the system comprises a modification module, wherein the modification module is used for modifying the file descriptor into a readable state through the driving interface after the framebuffer receives the video frame data transmitted by the SurfaceFlinger.
Further, the copy module specifically includes:
the screenshot thread reads the readable state of the framebuffer in a multiplexing mode, and copies the video frame data of the framebuffer to a preset video frame pile according to the readable state.
Further, the encoding the video frame data according to the encoder to generate the video data to be transmitted specifically includes:
and coding the video frame data according to an X264 or VPU coder to generate the video data to be transmitted in the H264 data format.
In another aspect, a further embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, where when the computer program runs, the apparatus where the computer-readable storage medium is located is controlled to execute the cloud mobile phone data transmission method according to the embodiment of the present invention.
The embodiment of the invention provides a cloud mobile phone data transmission method, a cloud mobile phone data transmission device and a storage medium, which can perform data transmission processing on data through double threads, preferentially reduce processing time, and simultaneously optimize the memory space of a system, thereby effectively improving the efficiency of data transmission.
Drawings
Fig. 1 is a schematic flow chart of a data transmission method for a cloud mobile phone according to the present invention;
fig. 2 is a schematic structural diagram of a cloud mobile phone data transmission device provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1:
a first embodiment of the invention.
The embodiment of the invention provides a cloud mobile phone data transmission method, which comprises the following steps:
s1, acquiring video frame data in a framebuffer readable state according to the screenshot thread, and copying the video frame data to a preset video frame pile;
s2, pushing the video frame pile into a video frame queue, and sending a notification message to a compression thread through a pipeline;
s3, after receiving the notification message, the code pressing thread takes out the video frame data corresponding to the preset video frame stack from the video frame queue, and codes the video frame data according to the coder to generate the video data to be transmitted;
and S4, returning the preset video frame pile to the video frame queue.
In the embodiment of the invention, the screenshot thread acquires video frame data in a framebuffer readable state through epoll, when new video frame data is monitored, the monitored video frame data is copied to a preset video frame pile, and the preset video frame pile is pushed into a video frame queue of the compression thread. The frequent memory application and memory release will generate more memory fragments, thereby reducing the performance of program operation. Preferably, since the video frames of the cloud mobile phone have high timeliness, there is no need to apply for an excessively large memory space, and the embodiment of the present invention preferably applies for a memory space of 5 frames in advance as a preset video frame stack. And the code pressing thread encodes the video frame data through an encoder to generate video data to be transmitted, sends the video data to be transmitted to the client and returns the preset video frame pile to the video frame queue. According to the embodiment of the invention, the video frame data are obtained through the screenshot thread, the video frame data are coded into the video data to be transmitted which are sent to the client through the code pressing thread, the cloud mobile phone data are transmitted through the double threads, the processing time can be effectively reduced, and the data transmission efficiency is improved; after the coding of the video frame data is finished, the preset video frame pile is returned to the video frame queue, so that the memory can be repeatedly utilized, the reduction of the running performance of the system due to the occurrence of memory fragments is avoided, and the data transmission efficiency is further improved.
As a specific implementation manner implemented by the present invention, before the step "the screenshot thread obtains the video data to be transmitted in a frame buffer readable state by using a multiplexing method, and copies the video data to be transmitted to a preset video frame pile", the method further includes the steps of:
the framebuffer receives the video frame data transmitted by the surfaceFlinger and modifies the file descriptor into a readable state through the driving interface.
In the embodiment of the invention, the surfeFinger modifies the file descriptor of the video frame data into the readable state through the driving interface, and the screenshot thread acquires the readable state of the frame buffer in a multiplexing mode, so that the video frame data of the frame buffer is read.
As a specific implementation manner implemented by the present invention, the "screenshot thread acquires video frame data in a frame buffer readable state, and copies the video frame data to a preset video frame heap", specifically:
and the screenshot thread reads the readable state of the framebuffer in a multiplexing mode and copies the video frame data of the framebuffer to a preset video frame pile according to the readable state.
As a specific implementation manner implemented by the present invention, encoding video frame data according to an encoder to generate video data to be transmitted, specifically:
and coding the video frame data according to an X264 or VPU coder to generate the video data to be transmitted in the H264 data format.
In the embodiment of the invention, x264 is an open-source H.264/MPEG-4AVC video coding function library, which is one of the best lossy video coders, and technically, the standard of the H264 data format has a plurality of flashing places, such as unified VLC symbol coding, high-precision multi-mode displacement estimation, 4-block-based integer transformation, layered coding syntax and the like. These measures make H264 have very high coding efficiency, and can save about 50% of code rate than H263 under the same reconstructed image quality. The code stream structure network of H264 has strong adaptability, increases the error recovery capability, and can effectively adapt to the application of IP and wireless networks.
The embodiment of the invention has the following beneficial effects:
according to the embodiment of the invention, the video frame data are obtained through the screenshot thread, the video frame data are coded into the video data to be transmitted which are sent to the client through the code pressing thread, the cloud mobile phone data are transmitted through the double threads, the processing time can be effectively reduced, and the data transmission efficiency is improved; after the coding of the video frame data is finished, the preset video frame pile is returned to the video frame queue, so that the memory can be repeatedly utilized, the reduction of the running performance of the system due to the occurrence of memory fragments is avoided, and the data transmission efficiency is further improved.
Please refer to fig. 2:
a second embodiment of the invention.
The embodiment of the invention provides a cloud mobile phone data transmission device, which comprises a copying module, a notification module, an encoding module and a returning module, wherein the copying module is used for copying data;
the copying module is used for acquiring video frame data in a framebuffer readable state according to the screenshot thread and copying the video frame data to a preset video frame pile;
the notification module is used for pushing the video frame pile into a video frame queue and sending a notification message to the code pressing thread through a pipeline;
the coding module is used for taking out video frame data corresponding to a preset video frame pile from the video frame queue after the notification message is received by the code pressing thread, and coding the video frame data according to the coder to generate video data to be transmitted;
and the return module is used for returning the preset video frame pile to the video frame queue.
In the embodiment of the invention, the screenshot thread acquires video frame data in a framebuffer readable state through epoll, when new video frame data is monitored, the monitored video frame data is copied to a preset video frame pile, and the preset video frame pile is pushed into a video frame queue of the compression thread. The frequent memory application and memory release will generate more memory fragments, thereby reducing the performance of program operation. Preferably, since the video frames of the cloud mobile phone have high timeliness, there is no need to apply for an excessively large memory space, and the embodiment of the present invention preferably applies for a memory space of 5 frames in advance as a preset video frame stack. And the code pressing thread encodes the video frame data through an encoder to generate video data to be transmitted, sends the video data to be transmitted to the client and returns the preset video frame pile to the video frame queue. According to the embodiment of the invention, the video frame data are obtained through the screenshot thread, the video frame data are coded into the video data to be transmitted which are sent to the client through the code pressing thread, the cloud mobile phone data are transmitted through the double threads, the processing time can be effectively reduced, and the data transmission efficiency is improved; after the coding of the video frame data is finished, the preset video frame pile is returned to the video frame queue, so that the memory can be repeatedly utilized, the reduction of the running performance of the system due to the occurrence of memory fragments is avoided, and the data transmission efficiency is further improved.
As a specific implementation manner of the embodiment of the present invention, the system further includes a modification module, configured to modify, by a driving interface, the file descriptor to be in a readable state after the framebuffer receives the video frame data transmitted by the surfefinger.
In the embodiment of the invention, the surfeFinger modifies the file descriptor of the video frame data into the readable state through the driving interface, and the screenshot thread acquires the readable state of the frame buffer in a multiplexing mode, so that the video frame data of the frame buffer is read.
As a specific implementation manner of the embodiment of the present invention, the copy module specifically includes:
and the screenshot thread reads the readable state of the framebuffer in a multiplexing mode and copies the video frame data of the framebuffer to a preset video frame pile according to the readable state.
As a specific implementation manner of the embodiment of the present invention, encoding video frame data according to an encoder to generate video data to be transmitted includes:
and coding the video frame data according to an X264 or VPU coder to generate the video data to be transmitted in the H264 data format.
In the embodiment of the invention, x264 is an open-source H.264/MPEG-4AVC video coding function library, which is one of the best lossy video coders, and technically, the standard of the H264 data format has a plurality of flashing places, such as unified VLC symbol coding, high-precision multi-mode displacement estimation, 4-block-based integer transformation, layered coding syntax and the like. These measures make H264 have very high coding efficiency, and can save about 50% of code rate than H263 under the same reconstructed image quality. The code stream structure network of H264 has strong adaptability, increases the error recovery capability, and can effectively adapt to the application of IP and wireless networks.
The embodiment of the invention has the following beneficial effects:
according to the embodiment of the invention, the video frame data are obtained through the screenshot thread, the video frame data are coded into the video data to be transmitted which are sent to the client through the code pressing thread, the cloud mobile phone data are transmitted through the double threads, the processing time can be effectively reduced, and the data transmission efficiency is improved; after the coding of the video frame data is finished, the preset video frame pile is returned to the video frame queue, so that the memory can be repeatedly utilized, the reduction of the running performance of the system due to the occurrence of memory fragments is avoided, and the data transmission efficiency is further improved.
In another aspect, a further embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium includes a stored computer program, where, when the computer program runs, the apparatus where the computer-readable storage medium is located is controlled to perform the cloud mobile phone data transmission method according to the embodiment of the present invention.
It should be noted that the above-described device embodiments are merely illustrative, and units illustrated as separate components may or may not be physically separate, and components illustrated as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
The foregoing is a preferred embodiment of the present invention, and it should be noted that it would be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the principles of the invention, and such modifications and enhancements are also considered to be within the scope of the invention.
Claims (7)
1. A cloud mobile phone data transmission method is characterized by comprising the following steps:
the method comprises the steps of obtaining video frame data in a framebuffer readable state according to a screenshot thread, and copying the video frame data to a preset video frame pile, wherein the method specifically comprises the following steps: the screenshot thread reads the readable state of the framebuffer in a multiplexing mode, and copies the video frame data of the framebuffer to a preset video frame pile according to the readable state;
pushing the video frame pile into a video frame queue, and sending a notification message to a code pressing thread through a pipeline;
after receiving the notification message, the code pressing thread takes out video frame data corresponding to a preset video frame stack from the video frame queue, and encodes the video frame data according to an encoder to generate video data to be transmitted;
and returning the preset video frame pile to the video frame queue.
2. The cloud mobile phone data transmission method according to claim 1, wherein before the step "screenshot thread acquires video data to be transmitted in a framebuffer readable state by a multiplexing method, and copies the video data to be transmitted to a preset video frame pile", the method further comprises the steps of:
the framebuffer receives the video frame data transmitted by the SurfaceFlinger and modifies the file descriptor into a readable state through the driving interface.
3. The cloud mobile phone data transmission method according to claim 1, wherein the encoding of the video frame data according to the encoder to generate the video data to be transmitted specifically includes:
and coding the video frame data according to an X264 or VPU coder to generate the video data to be transmitted in the H264 data format.
4. A cloud mobile phone data transmission device is characterized by comprising a copying module, a notification module, an encoding module and a returning module;
the copying module is used for acquiring video frame data in a framebuffer readable state according to the screenshot thread and copying the video frame data to a preset video frame pile, and is specifically used for: the screenshot thread reads the readable state of the framebuffer in a multiplexing mode, and copies the video frame data of the framebuffer to a preset video frame pile according to the readable state;
the notification module is used for pushing the video frame pile into a video frame queue and sending a notification message to a code pressing thread through a pipeline;
the encoding module is used for taking out video frame data corresponding to a preset video frame stack from the video frame queue after the code pressing thread receives the notification message, and encoding the video frame data according to an encoder to generate video data to be transmitted;
and the return module is used for returning the preset video frame piles to the video frame queue.
5. The cloud phone data transmission device according to claim 4, further comprising a modification module, configured to modify the file descriptor to be in a readable state through the driving interface after the framebuffer receives the video frame data transmitted by the surfefinger.
6. The cloud mobile phone data transmission device according to claim 4, wherein the encoding the video frame data according to the encoder to generate the video data to be transmitted specifically is:
and coding the video frame data according to an X264 or VPU coder to generate the video data to be transmitted in the H264 data format.
7. A computer-readable storage medium, comprising a stored computer program, wherein when the computer program runs, the computer-readable storage medium is controlled by a device to execute the cloud mobile phone data transmission method according to any one of claims 1 to 3.
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| CN111669717B (en) * | 2020-05-08 | 2022-03-25 | 广州微算互联信息技术有限公司 | Cloud mobile phone data sending method, computer device and storage medium |
| CN112653787B (en) * | 2020-12-16 | 2023-05-12 | 深圳市锐尔觅移动通信有限公司 | Display method, display device, storage medium and electronic equipment |
| CN113867820A (en) * | 2021-09-29 | 2021-12-31 | 深圳市智微智能软件开发有限公司 | Method, device and equipment for dynamically modifying frame buffer and storage medium |
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