WO2016095183A1

WO2016095183A1 - Method and device for encrypting and decrypting data by gstreamer

Info

Publication number: WO2016095183A1
Application number: PCT/CN2014/094303
Authority: WO
Inventors: 陈耀宗
Original assignee: 深圳Tcl数字技术有限公司
Priority date: 2014-12-15
Filing date: 2014-12-19
Publication date: 2016-06-23
Also published as: CN105763938A; CN105763938B

Abstract

A method for encrypting and decrypting data by Gstreamer is disclosed in the present invention. The method includes the following steps of: creating an independent data collection module in a pipeline, integrating the data collection module into a source element, collecting encrypted data by the data collection module, transferring the collected encrypted data to a queue of the source element, and pushing the encrypted data to a decryption element; decrypting the encrypted data by the decryption element, and pushing the decrypted data to a decoding element; and decoding the decrypted data by the decoding element to play the decoded data. A device for encrypting and decrypting data by Gstreamer is also disclosed in the present invention, wherein the device is corresponding to the method. According to the present invention, the downloaded encrypted data can be properly played in the pipeline, decrypting the encrypted data is realized, and properly playing the encrypted data in the pipeline can be ensured.

Description

Method and device for decrypting encrypted data by GStreamer

Technical field

The present invention relates to the field of streaming media data processing technologies, and in particular, to a GStreamer method and apparatus for decrypting encrypted data.

Background technique

GStreamer is an open source streaming media framework. GStreamer is based on plugins. Some of the plugins provide a variety of multimedia digital codecs, and some plugins provide other functions. All plugins can be linked. Go to any of the defined data flow pipelines.

The source plug-ins in the current GStreamer plug-in basically cover various file formats, for example, single-audio data wma, the main components used in the pipeline (ie plug-ins) are source components (ie source components), demux components ( That is, the demultiplexer component), the decode component (ie, the decoding component), the converter component (ie, the converter component), and the sink component (ie, the receiver component), which are constructed as a pipeline to complete the processing of the data, and the Source component is responsible for the pipeline. The source component of the read data, the demux component is responsible for preliminary processing and shunting of the data, and the buffer component is sent to the corresponding audio and video decoder to decode the media data. The decode component completes the decoding function, forms the YUV component data, the converter component performs the further conversion filtering, and finally plays the video and audio to the screen and the sound card end respectively through the sink component.

In summary, although the pipeline creation process is very convenient, the plug-ins implemented by GStreamer are currently for clearing files, and for encrypted data, such as with DRM (Data Rights) Management, digital rights management) Streaming media data of encrypted information, but there is no corresponding plug-in to achieve the decryption process of encrypted data, which causes the pipeline to play encrypted data failed.

Summary of the invention

The main object of the present invention is to provide a method and device for decrypting encrypted data by GStreamer, aiming at decrypting encrypted data and ensuring that the pipeline plays encrypted data normally.

In order to achieve the above object, the present invention provides a method for GStreamer to decrypt encrypted data, and the method for decrypting encrypted data by the GStreamer includes the following steps:

Creating a separate data collection module in the pipeline, integrating the data collection module in the source component;

Collecting encrypted data through a data collection module in the source component, passing the collected encrypted data to a queue that the source component has created, and pushing the encrypted data to the decryption component;

Decrypting the encrypted data by a decryption component and pushing the decrypted data to a decoding component;

The decrypted data is decoded by the decoding component to play the decoded data.

Preferably, the step of collecting the encrypted data by the data collection module in the source component, transferring the collected encrypted data to a queue that the source component has created, and pushing the encrypted data to the decryption component comprises:

Setting the state of the source component to a processing state, and transmitting the encrypted data containing the uri attribute transmitted from the pipeline to the data collection module, and saving the encrypted data to a temporary buffer through the data collection module;

Passing the encrypted data in the buffer to the queue of the source component by the callback function;

The source pad is set according to the attributes of the source element, and the encrypted data from the callback is pushed onto the source pad, and the encrypted data is pushed to the decryption element by the source pad.

Preferably, the step of decrypting the encrypted data by the decryption component and pushing the decrypted data to the decoding component comprises:

Creating a decryption module, integrating the decryption module into the decryption component;

Creating a sink pad and a src pad for the decryption component;

Setting the attribute of the decryption element according to the decryption manner of the encrypted data;

Copying the encrypted data to the decryption module for decryption in the buffer of the sink pad;

The decrypted data is pushed to the decoding component in the pipeline according to the decrypted data type.

Preferably, the method for decrypting the encrypted data by the GStreamer further includes:

Creating a source element for collecting and managing encrypted data in a pipeline; the pipeline is a playbin2 pipeline, and the source component is a pysrc component;

The steps of creating a source component for collecting and managing encrypted data in the pipeline include:

Parsing the URL of the identity source component according to the pysrc protocol, and finding the pysrc component that needs to be downloaded;

Modifying the uri attribute of the playbin2 pipeline to the attribute corresponding to the pysrc component;

Adding the pysrc component to the pipeline according to the uri attribute through the playbin2 pipeline;

Modify the properties of the pysrc component to make it ready;

Creating a queue for managing the encrypted data in the pysrc element;

The source pad is set according to the attributes of the pysrc element to push the encrypted data read by the queue onto the source pad.

A decryption element and a decoding element are created in the pipeline.

In addition, in order to achieve the above object, the present invention further provides an apparatus for decrypting encrypted data by a GStreamer, where the apparatus for decrypting encrypted data by the GStreamer includes:

a component creation module, configured to create an independent data collection module in the pipeline, and the data collection module is in the source component;

a data downloading module, configured to collect encrypted data by using a data collection module in the source component, transfer the collected encrypted data to a queue that the source component has created, and push the encrypted data to the decryption component;

a data decryption module, configured to decrypt the encrypted data by a decryption component, and push the decrypted data to a decoding component;

The data decoding module is configured to decode the decrypted data by the decoding component to play the decoded data.

Preferably, the data download module is specifically configured to:

Preferably, the data decryption module is specifically configured to:

Creating a sink pad and a src pad for the decryption component;

Preferably, the component creation module is further configured to create a source component for collecting and managing encrypted data in a pipeline; the pipeline is a playbin2 pipeline, and the source component is a pysrc component;

The component creation module creates a source component in the pipeline for collecting and managing encrypted data, specifically:

Modify the properties of the pysrc component to make it ready;

Creating a queue for managing the encrypted data in the pysrc element;

Preferably, the component creation module is further configured to create a decryption component and a decoding component in the pipeline.

The method and device for decrypting encrypted data by the GStreamer provided by the invention create an independent data collection module in the pipeline, integrate the data collection module in the source component, collect the encrypted data through the data collection module, and transmit the collected encrypted data. Going to the queue in which the source component has been created, and pushing the encrypted data to the decryption component, decrypting the encrypted data by the decryption component, and pushing the decrypted data to the decoding component, so that the decrypted data can pass through After decoding, the decoding component is pushed to the corresponding audio decoding plug-in and video decoding plug-in, so that the downloaded encrypted data can be played normally in the pipeline. Thereby, the encrypted data (such as streaming media data with DRM encrypted information) is decrypted, and the pipeline can ensure that the encrypted data is played normally.

DRAWINGS

1 is a schematic flowchart of a method for decrypting encrypted data by GStreamer according to an embodiment of the present invention;

2 is a schematic flow chart of step S20 in FIG. 1;

3 is a schematic flow chart of step S30 in FIG. 1;

4 is a schematic flow chart of another embodiment of a method for decrypting encrypted data by a GStreamer according to the present invention;

FIG. 5 is a schematic flowchart of step S50 in FIG. 4;

6 is a schematic flowchart diagram of still another embodiment of a method for decrypting encrypted data by a GStreamer according to the present invention;

FIG. 7 is a schematic structural diagram of an apparatus for decrypting encrypted data by GStreamer according to an embodiment of the present invention.

The objectives, functional features, and advantages of the present invention will be described in conjunction with the embodiments of the invention.

detailed description

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides a method for decrypting encrypted data by GStreamer, which can be applied to VOD (Video On Demand, video on demand technology) is playing.

Referring to FIG. 1, FIG. 1 is a schematic flowchart of a method for decrypting encrypted data by GStreamer according to an embodiment of the present invention.

In the first embodiment of the present invention, the method for decrypting encrypted data by the GStreamer of the present invention comprises the following steps:

Step S10: creating an independent data collection module in the pipeline, and integrating the data collection module in the source component;

Step S20: collecting encrypted data by a data collection module in the source component, transferring the collected encrypted data to a queue that the source component has created, and pushing the encrypted data to the decryption component;

Step S30: decrypting the encrypted data by a decryption component, and pushing the decrypted data to the decoding component;

Step S40: Decoding the decrypted data by the decoding component to play the decoded data.

In the present embodiment, the present embodiment collects encrypted data by creating a data collection module in a pipeline, and integrates the data collection module into a source component, thereby collecting encrypted data through the source component. After the data collection module is in the source component, the encrypted data may be collected through the data collection module, for example, collecting streaming media data with DRM encrypted information, and the data source of the streaming media data with DRM encrypted information may be local hard disk data, a network server. , TV data or third party download data. The downloaded encrypted data is pushed to the decryption component by the source component, the received encrypted data is decrypted by the decryption component, and the decrypted data is pushed to the decoding component, and the decrypted data is decoded by the decoding component to play Decoded data.

Compared with the prior art, the GStreamer of the present invention decrypts encrypted data, creates an independent data collection module in the pipeline, and integrates the data collection module in the source component to collect the encrypted data, and encrypts the collection of the source component through the decryption component. The data is decrypted, so that the decrypted data can be decoded by the decoding component and then pushed to the corresponding audio decoding plug-in and video decoding plug-in, so that the downloaded encrypted data can be played normally in the pipeline. Thereby, the decryption of the encrypted data is realized, and the pipeline can ensure that the encrypted data is normally played.

Referring again to FIG. 2, FIG. 2 is a schematic flow chart of step S20 of FIG.

Based on the foregoing first embodiment, in the second embodiment of the present invention, step S20 includes:

Step S21: setting the state of the source component to the processing state, and transmitting the encrypted data containing the uri attribute transmitted from the pipeline to the data collection module, and saving the encrypted data to a temporary buffer through the data collection module;

Step S22: Passing the encrypted data in the buffer to the queue of the source element by the callback function;

Step S23: setting the source pad according to the attribute of the source element, pushing the encrypted data of the callback onto the source pad, and pushing the encrypted data to the decryption element through the source pad.

In this embodiment, the collected encrypted data is processed by the state of the source element as being processed, and the uri (Uniform Resource) transmitted from the pipeline is included. Identifier, universal resource identifier) The encrypted data of the attribute is passed to the data collection module, and the data collection module collects the encrypted data according to the data source of the encrypted data (ie, local hard disk data, network server, television data, or third party downloaded data). Save to a temporary buffer.

After the data collection module saves the collected encrypted data, the encrypted data in the buffer can be passed to the queue created by the source component by the callback function.

After passing the encrypted data to the queue in the source element, the source pad is set according to the attributes of the source element, and the encrypted data that is recalled into the queue is pushed onto the source pad, due to the source pad and decryption of the source element The components are connected so that the encrypted data can be pushed to the decryption component through the source pad.

In this embodiment, the encrypted data of the callback is specifically pushed to the source pad of the created source component by the g_queue_push_tail() function, and the encrypted data is pushed to the buffer on the source pad by the g_queue_pop_head() function, and the source pad is used. The primary role is to stream data to the decryption component, establishing a collection-decryption channel to push the encrypted data in the buffer on the source pad to the decryption component.

Referring again to FIG. 3, FIG. 3 is a schematic flowchart of step S30 in FIG.

Based on the foregoing first embodiment, in the third embodiment of the present invention, step S30 includes:

Step S31: creating a decryption module, integrating the decryption module into the decryption component;

Step S32: creating a sink pad and a src pad of the decryption component;

Step S33: setting an attribute of the decryption element according to a decryption manner of the encrypted data;

Step S34: copying the encrypted data to the decryption module in the buffer of the sink pad for decryption;

Step S35: Push the decrypted data to the decoding component in the pipeline according to the decrypted data type.

In this embodiment, the decryption module is created to decrypt the encrypted data, and at the same time, the sink pad of the decryption component is created to receive the encrypted data of the source pad; the src pad of the decryption component is created to push the decrypted component to the decoding component at the back end of the pipeline. data. Register the caps function and the chain function, determine the connected pad through the Caps function, and determine the type of data stream flowing between the pads. The chain function can decrypt the data flowing through the chain function. Therefore, according to the decryption mode of the encrypted data, the attribute of the decryption component is set by the g_object_set() function, the encrypted data in the buffer of the sink pad is copied by the chain function to the decryption module for decryption, and the decrypted data is judged according to the decrypted data. Type, respectively, to the video decoding plug-in and audio decoding plug-in in the pipeline to push the decrypted data.

In the process of processing the encrypted streaming media data, after the streaming media data flows through the pysrc component, both the audio and the video data must be decrypted before being decoded by the decoding component. Accordingly, the decryption module needs to be encapsulated. The encapsulation process needs to define the instance structure and class structure of the new object in the header file, and the parameters related to decryption are set in the instance structure.

According to the decryption parameters of the decryption module, you need to set the properties of the component. This can be done by setting the properties of GObject. The properties of GObject are in _ Defined in the class_init() function. The specific implementation process can modify the pipeline property of the component through the GStreamer system function g_object_set() function. The decryption component can obtain the parameter value set by the application by executing the _set_property() or _get_porterty() function.

The sink pad is used to receive the encrypted data passed by the pysrc component. Since the sink pad is set to a permanent pad, the caps negotiation is not performed here. Because the pysrc component is passed with encrypted data, you can directly set the sink pad to a static pad. You can set the GstStaticPadTemplate property value to "applacation/playready". Thus, when the src pad of the pysrc component fluidizes the data, the decryption component can be automatically found, and the decryption component can be connected to the source component. The src pad is responsible for pushing the decrypted data to the downstream decoding component, so there are some differences in setting the src pad. Here, setting the src pad parameter to ANY means that all data can pass, in the plugin_init() function. Register the sink pad and the src pad to complete the setting of the decryption component pad. After the pad of the decryption component is created, it is set Gst_pad_set_setcaps_function() function; The gst_pad_set_caps() function is then called to set the fixed caps property of the pad, so that the data type flowing through the pad can be controlled to transmit the data to the corresponding video decoding plug-in and audio decoding plug-in respectively.

In this embodiment, the chain function is bound to the sink pad to ensure that the encrypted data streamed from the pysrc component can be processed directly. For the encrypted data transmitted from the sink pad, call the drm_decrypt() function to complete the decryption, form the raw data, then determine the decrypted data type, call the caps negotiation, and push the data to the corresponding audio decoding component and video decoding component. In the process of transmitting the encrypted data, in order to synchronize the processed audio and video data, the corresponding time stamp may be marked in the data, so that the subsequently connected components can use the time stamp to perform the corresponding audio and video data synchronization processing.

Referring to FIG. 4 again, FIG. 4 is a schematic flowchart diagram of another embodiment of a method for decrypting encrypted data by GStreamer according to the present invention.

Based on the foregoing first embodiment, in the fourth embodiment of the present invention, the method for decrypting the encrypted data by the GStreamer of the present invention further includes: before step S10:

Step S50: Create a source component for collecting and managing encrypted data in the pipeline; wherein the pipeline is a playbin2 pipeline, and the source component is a pysrc component.

Playbin2 is a relatively advanced pipeline in GStreamer that automates the loading and linking of components. It automatically assembles a complete conversion chain from input to output based on the type of data stream transformation and the component properties registered in the component list. .

A source component for collecting encrypted data is created in the playbin2 pipeline, so that the download and analysis of the streaming media data with drm can be managed by the source component.

Referring again to FIG. 5, FIG. 5 is a schematic flow chart of step S50 in FIG.

Based on the fourth embodiment, in the fifth embodiment of the present invention, step S50 includes:

Step S51: parsing the URL of the identifier source component according to the pysrc protocol, and searching for the pysrc component to be downloaded;

Step S52: Modify the uri attribute of the playbin2 pipeline to be an attribute corresponding to the pysrc component;

Step S53: adding the pysrc component to the pipeline according to the uri attribute through the playbin2 pipeline;

Step S54: Modify the attributes of the pysrc component to make it in the ready state;

Step S55: creating a queue for managing the encrypted data in the pysrc element;

Step S56: The source pad is set according to the attribute of the pysrc element to push the encrypted data read by the queue onto the source pad.

The playback system accesses streaming media data through the URL of the streaming media (Uniform Resource Locator, Uniform Resource Locator), and gstrreamer will find different source components for different protocols, so you need to parse the URL first. In order to get the pysrc component found by the playbin2 pipeline, set the URL with the pysrc protocol. When setting a new URL for the new source component, call the iface->set_uri() function of the component override. The corresponding function is gst_pysrc_uri_handler_init(). Function, the gst_pysrc_uri_handler_init() function registers four functions _get_type () function, _get_protocols () function, _set_uri () and function _get_uri () function, these functions mainly complete the analysis of the URL, get the streaming data type, transport protocol, new pysrc The URL, and the request URI (general resource identifier request) corresponding to the pysrc URL are generated and stored. The generated request when the source component starts The uri is passed to the data collection module, where it is ready to read the data for the pipeline. Thus, the URL of the identity source component is parsed according to the pysrc protocol, and by analyzing the URL, the pysrc component that needs to be downloaded can be found.

In this embodiment, the specific process of modifying the attributes of the pysrc component to make it in the ready state is: outputting the source-setup signal after adding the pysrc component through the playbin2 pipeline; the state rewriting function rewriting the attributes of the pysrc component according to the source-setup signal described above. And set the pysrc component to the ready state, which is the ready state.

In this embodiment, the buffer of the data collection module is managed by creating a queue queue, and the queue queue is inherited by the Gstreamer base class, so that the external data and the gstreamer can be unified.

This embodiment takes the encrypted data on the queue queue by setting the source pad and sends it to the buffer on the source pad. After the pipeline connection is successful, the data can be transferred to the decryption component. In this embodiment, the source pad is preferably set as a permanent pad (ie, a static pad), and the GstStaticPadTemplate attribute value can be set to "applacation/playready". In addition, the source pad can also be set as a dynamic pad according to actual needs, which is not limited herein.

Referring again to FIG. 6, FIG. 6 is a schematic flowchart diagram of still another embodiment of a method for decrypting encrypted data by GStreamer according to the present invention.

Based on the above embodiment, in the sixth embodiment of the present invention, the method for decrypting the encrypted data by the GStreamer of the present invention further includes:

Step S60: Creating a decryption element and a decoding element in the pipeline.

In this embodiment, the encrypted data is decrypted by creating a decryption component in the pipeline, thereby enabling decryption of the streaming media data containing the encrypted information, and ensuring normal playback of the streaming media data.

The present invention also provides an apparatus for GStreamer to decrypt encrypted data.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of an apparatus for decrypting encrypted data by GStreamer according to an embodiment of the present invention.

As shown in FIG. 7, the device for decrypting encrypted data by the GStreamer includes:

a component creation module 100, configured to create an independent data collection module in the pipeline, and the data collection module is in the source component;

a data downloading module 200, configured to encrypt data collected by a source component, and push the encrypted data to a decryption component;

The data decryption module 300 is configured to decrypt the encrypted data by using a decryption component, and push the decrypted data to the decoding component;

The data decoding module 400 is configured to decode the decrypted data by the decoding component to play the decoded data.

In this embodiment, the component creation module 100 creates an independent data collection module in the pipeline, the data collection module being in the source component to collect the encrypted data by the source component. The data download module 200 collects encrypted data by using a data collection module of the source component, for example, collecting streaming media data with DRM encrypted information, and the data source of the streaming media data with DRM encrypted information may be local hard disk data, network server, television data, or Three parties download the data. The data downloading module 200 pushes the downloaded encrypted data to the decryption component through the source component, the data decryption module 300 decrypts the received encrypted data through the decryption component, and pushes the decrypted data to the decoding component, and the data decoding module 400 passes The decoding component decodes the decrypted data to play the decoded data.

Compared with the prior art, the GStreamer of the present invention decrypts encrypted data, creates an independent data collection module in the pipeline, and integrates the data collection module in the source component to collect the encrypted data and encrypt the source component through the decryption component. The data is decrypted, so that the decrypted data can be decoded by the decoding component and then pushed to the corresponding audio decoding plug-in and video decoding plug-in, so that the downloaded encrypted data can be played normally in the pipeline. Thereby, the decryption of the encrypted data is realized, and the pipeline can ensure that the encrypted data is normally played.

Specifically, the data download module 200 is specifically configured to:

Specifically, the data decryption module 300 is specifically configured to:

Creating a sink pad and a src pad for the decryption component;

Specifically, the component creation module 100 is further configured to create a source component for collecting and managing encrypted data in the pipeline; wherein the pipeline is a playbin2 pipeline, and the source component is a pysrc component.

The source component for creating and managing encrypted data in the pipeline by the component creation module 100 is specifically:

Modify the properties of the pysrc component to make it ready;

Creating a queue for managing the encrypted data in the pysrc element;

Specifically, the component creation module 100 is further configured to create a decryption component and a decoding component in a pipeline.

In this embodiment, the component creation module 100 creates a decryption component in the pipeline to decrypt the encrypted data, thereby enabling decryption of the streaming media data containing the encrypted information, and ensuring normal playback of the streaming media data.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related The technical field is equally included in the scope of patent protection of the present invention.

Claims

A method for decrypting encrypted data by a GStreamer, characterized in that the method for decrypting encrypted data by the GStreamer comprises the following steps:

Creating a separate data collection module in the pipeline, integrating the data collection module in the source component;

Collecting encrypted data through a data collection module in the source component, passing the collected encrypted data to a queue that the source component has created, and pushing the encrypted data to the decryption component;

Decrypting the encrypted data by a decryption component and pushing the decrypted data to a decoding component;

The decrypted data is decoded by the decoding component to play the decoded data.
The method for decrypting encrypted data by the GStreamer according to claim 1, wherein the encrypted data is collected by a data collection module in the source component, and the collected encrypted data is transferred to a queue that the source component has created, and The step of pushing the encrypted data to the decryption component includes:

Setting the state of the source component to a processing state, and transmitting the encrypted data containing the uri attribute transmitted from the pipeline to the data collection module, and saving the encrypted data to a temporary buffer through the data collection module;

Passing the encrypted data in the buffer to the queue of the source component by the callback function;

The source pad is set according to the attributes of the source element, and the encrypted data from the callback is pushed onto the source pad, and the encrypted data is pushed to the decryption element by the source pad.
The method of claim 2, wherein the GStreamer decrypts the encrypted data, wherein the source pad is set according to an attribute of the source element, and the encrypted data sent back to the source pad is pushed to the source pad, and the source pad is The step of pushing the encrypted data to the decryption component is as follows:

Set the source pad according to the attributes of the source component, push the encrypted data from the callback to the source pad of the source component through the g_queue_push_tail() function, and push the encrypted data to the buffer on the source pad through the g_queue_pop_head() function. The encrypted data in the buffer on the source pad is pushed to the decryption element.
A method for decrypting encrypted data by a GStreamer according to claim 1, wherein said step of decrypting said encrypted data by said decrypting element and pushing said decrypted data to said decoding element comprises:

Creating a decryption module, integrating the decryption module into the decryption component;

Creating a sink pad and a src pad for the decryption component;

Setting the attribute of the decryption element according to the decryption manner of the encrypted data;

Copying the encrypted data to the decryption module for decryption in the buffer of the sink pad;

The decrypted data is pushed to the decoding component in the pipeline according to the decrypted data type.
The method for decrypting encrypted data by the GStreamer according to claim 1, wherein the method for decrypting the encrypted data by the GStreamer further comprises:

Creating a source element for collecting and managing encrypted data in a pipeline; the pipeline is a playbin2 pipeline, and the source component is a pysrc component;

The steps of creating a source component for collecting and managing encrypted data in the pipeline include:

Parsing the URL of the identity source component according to the pysrc protocol, and finding the pysrc component that needs to be downloaded;

Modifying the uri attribute of the playbin2 pipeline to the attribute corresponding to the pysrc component;

Adding the pysrc component to the pipeline according to the uri attribute through the playbin2 pipeline;

Modify the properties of the pysrc component to make it ready;

Creating a queue for managing the encrypted data in the pysrc element;

The source pad is set according to the attributes of the pysrc element to push the encrypted data read by the queue onto the source pad.
The method for decrypting encrypted data by GStreamer according to claim 5, wherein the step of modifying an attribute of the pysrc element to make it in a ready state is specifically:

After the pysrc component is added through the playbin2 pipeline, the source-setup signal is output; the state rewriting function rewrites the properties of the pysrc component according to the source-setup signal, and sets the pysrc component to the ready state.
The method for decrypting encrypted data by the GStreamer according to claim 1, wherein the method for decrypting the encrypted data by the GStreamer further comprises:

A decryption element and a decoding element are created in the pipeline.
The method for decrypting encrypted data by the GStreamer according to claim 2, wherein the method for decrypting the encrypted data by the GStreamer further comprises:

A decryption element and a decoding element are created in the pipeline.
The method for decrypting encrypted data by the GStreamer according to claim 4, wherein the method for decrypting the encrypted data by the GStreamer further comprises:

A decryption element and a decoding element are created in the pipeline.
The method for decrypting encrypted data by the GStreamer according to claim 5, wherein the method for decrypting the encrypted data by the GStreamer further comprises:

A decryption element and a decoding element are created in the pipeline.
An apparatus for decrypting encrypted data by a GStreamer, wherein the apparatus for decrypting encrypted data by the GStreamer includes:

a component creation module, configured to create an independent data collection module in the pipeline, and the data collection module is in the source component;

a data downloading module, configured to collect encrypted data by using a data collection module in the source component, transfer the collected encrypted data to a queue that the source component has created, and push the encrypted data to the decryption component;

a data decryption module, configured to decrypt the encrypted data by a decryption component, and push the decrypted data to a decoding component;

The data decoding module is configured to decode the decrypted data by the decoding component to play the decoded data.
The apparatus for decrypting encrypted data by the GStreamer according to claim 11, wherein the data downloading module is specifically configured to:

Setting the state of the source component to a processing state, and transmitting the encrypted data containing the uri attribute transmitted from the pipeline to the data collection module, and saving the encrypted data to a temporary buffer through the data collection module;

Passing the encrypted data in the buffer to the queue of the source component by the callback function;

The source pad is set according to the attributes of the source element, and the encrypted data from the callback is pushed onto the source pad, and the encrypted data is pushed to the decryption element by the source pad.
The apparatus for decrypting encrypted data by the GStreamer according to claim 12, wherein the data downloading module sets a source pad according to an attribute of the source component, and pushes the encrypted data sent back to the source pad. The source pad pushes the encrypted data to the decryption component as follows:

Set the source pad according to the attributes of the source component, push the encrypted data from the callback to the source pad of the source component through the g_queue_push_tail() function, and push the encrypted data to the buffer on the source pad through the g_queue_pop_head() function. The encrypted data in the buffer on the source pad is pushed to the decryption element.
The apparatus for decrypting encrypted data by the GStreamer according to claim 11, wherein the data decryption module is specifically configured to:

Creating a decryption module, integrating the decryption module into the decryption component;

Creating a sink pad and a src pad for the decryption component;

Setting the attribute of the decryption element according to the decryption manner of the encrypted data;

Copying the encrypted data to the decryption module for decryption in the buffer of the sink pad;

The decrypted data is pushed to the decoding component in the pipeline according to the decrypted data type.
The apparatus for decrypting encrypted data by the GStreamer according to claim 11, wherein the component creation module is further configured to create a source component for collecting and managing encrypted data in a pipeline; the pipeline is a playbin2 pipeline, The source component is a pysrc component;

The component creation module creates a source component in the pipeline for collecting and managing encrypted data, specifically:

Parsing the URL of the identity source component according to the pysrc protocol, and finding the pysrc component that needs to be downloaded;

Modifying the uri attribute of the playbin2 pipeline to the attribute corresponding to the pysrc component;

Adding the pysrc component to the pipeline according to the uri attribute through the playbin2 pipeline;

Modify the properties of the pysrc component to make it ready;

Creating a queue for managing the encrypted data in the pysrc element;

The source pad is set according to the attributes of the pysrc element to push the encrypted data read by the queue onto the source pad.
The apparatus for decrypting encrypted data by the GStreamer according to claim 15, wherein the component creation module modifies an attribute of the pysrc element to be in a ready state, specifically:

After the pysrc component is added through the playbin2 pipeline, the source-setup signal is output; the state rewriting function rewrites the properties of the pysrc component according to the source-setup signal, and sets the pysrc component to the ready state.
The apparatus for decrypting encrypted data by a GStreamer according to claim 11, wherein said component creation module is further configured to create a decryption component and a decoding component in a pipeline.
The apparatus for decrypting encrypted data by a GStreamer according to claim 12, wherein said component creation module is further configured to create a decryption component and a decoding component in the pipeline.
The apparatus for decrypting encrypted data by a GStreamer according to claim 14, wherein said component creation module is further configured to create a decryption component and a decoding component in a pipeline.
The apparatus for decrypting encrypted data by a GStreamer according to claim 15, wherein said component creation module is further configured to create a decryption component and a decoding component in the pipeline.