CN112910829B - Audio sharing method, device and system - Google Patents
Audio sharing method, device and system Download PDFInfo
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- CN112910829B CN112910829B CN201911224695.0A CN201911224695A CN112910829B CN 112910829 B CN112910829 B CN 112910829B CN 201911224695 A CN201911224695 A CN 201911224695A CN 112910829 B CN112910829 B CN 112910829B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/52—Network services specially adapted for the location of the user terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/668—Internet protocol [IP] address subnets
Abstract
The application provides an audio sharing method, an audio sharing device and an audio sharing system, and particularly, when a second terminal is confirmed to need to share audio resources, audio data played by a first terminal playing the audio resources at present is used as an information source and added to an advanced Linux sound system structure configuration file in the first terminal, so that audio output of the first terminal can be directly converted into audio input of the second terminal, namely, the audio input of the second terminal, and then the audio data in the information source is sent to the second terminal according to an IP address of the second terminal. Therefore, the second terminal can synchronously play the audio data played by the first terminal, and the sharing requirement of audio resources among different terminals can be further realized.
Description
Technical Field
The present application relates to the field of audio processing technologies, and in particular, to an audio sharing method, apparatus and system.
Background
With the continuous development of communication technology, various terminals provide more and more functions, for example, people can use different terminals to play audio resources such as music and broadcast.
However, some audio playback devices in the prior art cannot be freely moved, for example, televisions are usually fixedly installed in one location. If the audio is played on the equipment, and the user needs to go from the position of the terminal playing the audio to another position, the user can not continuously listen to the audio played on the terminal, and the use requirement of the user is further influenced. Therefore, it is necessary to provide a reasonable audio sharing method to continue playing the audio resource through other terminals.
Disclosure of Invention
The embodiment of the application provides an audio sharing method, device and system, so as to realize the sharing of audio resources among different terminals.
According to a first aspect of embodiments of the present application, there is provided an audio sharing method, including:
if the second terminal is confirmed to need to share the audio resource, the first terminal which is playing the audio resource currently is obtained;
adding the audio data played by the first terminal as an information source into an advanced Linux sound system structure configuration file in the first terminal;
and sending the audio data in the information source to the second terminal according to the IP address of the second terminal.
According to a second aspect of embodiments of the present application, there is provided an audio sharing apparatus, the apparatus including:
the first terminal confirmation module: if the second terminal is confirmed to need to share the audio resource, the first terminal which is playing the audio resource currently is obtained;
the information source setting module: the audio data playing by the first terminal is used as an information source and is added into an advanced Linux sound system structure configuration file in the first terminal;
a data sending module: and the audio data in the information source is sent to the second terminal according to the IP address of the second terminal.
According to a third aspect of the embodiments of the present application, there is provided an audio sharing system, including a server, and a terminal that is communicatively connected to the server and can play audio data, where the server is configured to perform the method of the first aspect of the embodiments of the present application.
According to the technical scheme, when the second terminal is confirmed to need to share the audio resource, the audio data played by the first terminal playing the audio resource at present is used as the information source and added to the configuration file of the advanced Linux sound system structure in the first terminal, so that the audio output of the first terminal can be directly converted into the audio input of the second terminal, namely, the information source of the second terminal, and then the audio data in the information source is sent to the second terminal according to the IP address of the second terminal. Therefore, the second terminal can synchronously play the audio data played by the first terminal, and the sharing requirement of audio resources among different terminals can be further realized.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any inventive exercise.
Fig. 1 is a schematic diagram of a basic structure of an audio sharing system according to an embodiment of the present application;
fig. 2 is a schematic basic flowchart of an audio sharing method according to an embodiment of the present application;
fig. 3a is a screenshot of information of a PulseAudio server of the first terminal extracted before playing an audio resource according to the embodiment;
fig. 3b is a screenshot of information of the PulseAudio server of the first terminal extracted when the audio resource is played according to the embodiment;
fig. 4a is a first information screenshot of the PulseAudio audio server of the first terminal extracted after the monitor is set as the information source according to the embodiment;
fig. 4b is a second information screenshot of the PulseAudio audio server of the first terminal extracted after the monitor is set as the information source according to the embodiment;
fig. 5 is a schematic diagram of a basic structure of an audio sharing device according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
With the continuous development of the smart home technology, the resource sharing requirements of users on different devices are also continuously improved. For example, when a user is listening to music through a sound device in a living room environment, and then gets up to a kitchen, how to enable the user to continue listening to the music through other power amplification devices in the kitchen environment becomes a problem to be mainly solved in this embodiment.
Fig. 1 is a schematic diagram of a basic structure of an audio sharing system according to an embodiment of the present disclosure. As shown in fig. 1, the system is provided with a server 100, and a plurality of audio playing terminals, such as a television 410, a mobile phone 420, and a stereo 430, which are in communication connection with the server 100 through a router 200. In addition, in order to realize monitoring of the spatial environment where the user is located, in the audio sharing system, a user position acquisition device 300 is further provided, which is in communication connection with the server 100 through the router 200, wherein the user position acquisition device 300 may be a camera, an infrared detection device, or the like, and the user position acquisition device 300 is configured to acquire the user position and transmit the acquired data to the server 100.
Based on the above system, the present embodiment configures the server 100 and the terminals connected thereto as follows to implement an audio sharing method between different terminals. Fig. 2 is a schematic basic flow chart of an audio sharing method according to an embodiment of the present disclosure. As shown in fig. 2, the method specifically includes the following steps:
s201: and if the second terminal is confirmed to need to share the audio resource, acquiring the first terminal which is playing the audio resource currently.
The method for confirming that the second terminal needs to share the audio resource may adopt the following mode:
s2011: and after receiving information that the user plays audio data by using audio playing equipment and the spatial position of the user is changed, judging whether a second terminal capable of playing the audio data exists in the space where the target place of the user is located.
For example, a user listens to music through sound equipment in a living room environment, and later rises to the direction of a kitchen, the server can detect that the spatial position of the user changes through a user position acquisition device such as a camera, and after the user enters the kitchen, the server can detect that the target location of the user is the kitchen through the user position acquisition device; then, the server determines whether there is a terminal capable of playing audio data in the space where the target location is located according to the terminal connected to the server, if so, step S2012 is executed, otherwise, the action of sharing audio resources is finished, and of course, the terminal capable of playing audio data that is closer to the target location may also be selected as the second terminal according to the target location of the user.
S2012: and determining that the second terminal needs to share the audio resource.
Of course, besides the mode that the second terminal needs to share the audio resource is confirmed in a mode of matching with the user position acquisition device, the user can actively initiate the demand instruction to the server.
For a terminal installed with a Linux system, when the server 100 obtains a first terminal currently playing the audio resource, the following method may be adopted:
s2013: the PulseAudio audio server is checked by using the pactl list command, and the terminal which is the sink is acquired.
The PulseAudio is a voice server, generally used in Linux operating system, and the user uses the virtual device provided by the PulseAudio server by setting the configuration file of the ALSA. The ALSA is short for Advanced Linux Sound Architecture (Advanced Linux Sound Architecture). Three common ALSA profiles are: alsa. conf, asourcend and asound. conf.
Where alsa.conf is the core configuration file of ALSA, and asoundrc and asound.conf are referenced in alsa.conf. Conf is used for realizing audio route control in the Linux system, and different routes can be set with different configuration combinations of a plurality of registers to form different audio channels. Conf is a default configuration file for the alsa-lib that can be used to perform higher level control of the device, providing access to the pcm plug-in the also-lib, thereby enabling more complex control. Due to differences in Linux operating system environments, asource and asound. conf are not found in all system directories. This embodiment takes the NVIDIA XAVIER platform as an example, and the Linux system used by this platform is a custom tailored version of ubuntu18.04, which uses as out.
The pactl is used for controlling the running PulseAudio audio service in the Linux system, and the audio virtual equipment provided by the PulseAudio in the Linux system can be checked by using the pactl list instruction.
The server checks the PulseAudio server of the terminal connected with the server by using the pactl list instruction, so that all PulseAudio server information including a sink (sink) and a source (source) can be obtained, and the terminal used as the sink can be determined according to the identification of the sink or the source in the obtained information.
S2014: and taking the terminal which is taken as the information sink and has the corresponding information sink port state converted from the idle state to the use state from the time of playing the audio resource to the time of playing the audio resource as the first terminal.
Before playing the audio resource, the PulseAudio server is checked by using a pactl list instruction, and the current idle sink can be obtained, wherein the audio resource can be a local audio resource stored in the terminal or an audio resource in a network medium.
Fig. 3a is a screenshot of information of the PulseAudio server extracted from the first terminal before the audio resource is played according to this embodiment. As shown in fig. 3a, the Sink number of the first terminal is Sink # 5, and the current State (State) is IDLE State (IDLE), but in this embodiment, the first terminal is taken as an example only, and after using the pactl list command, the Sink states of a plurality of terminals can be checked.
In this embodiment, taking a Gstreamer frame used by the first terminal in the NVIDIA XAVIER platform Linux Ubuntu18.04 system as an example, when playing a local audio resource, a pipeline is built through the Gstreamer to play an audio file, so as to realize playing of the local audio file city _16.wav, specifically, the following codes may be adopted:
Gst-launch-1.0filesrc location＝city_16k.wav！wavparse！autoaudiosink。
then, in the process of playing the audio resource, the pulse audio server is checked by using a pactl list instruction, and a sink in the current running state can be obtained. Fig. 3b is a screenshot of the PulseAudio server information of the first terminal extracted when the audio resource is played according to this embodiment. As shown in fig. 3b, the current State (State) of Sink # 5 is the RUNNING State (RUNNING).
Furthermore, according to the switching of the port states of each Sink before the audio resource is played, a first terminal for playing the audio resource can be determined, and the identification name of the virtual device corresponding to the first terminal in the PulseAudio audio server is the Sink # 5 in this embodiment.
S202: and adding the audio data played by the first terminal into an advanced Linux sound system structure configuration file in the first terminal as an information source.
First, the server 100 obtains the name of the monitor of the first terminal in the PulseAudio server from the PulseAudio server information called by the pactl list instruction. Taking the first terminal configuration in the above steps S2021 and S2022 as an example, as shown in fig. 3a and 3b, the signal sink # 5 corresponds to:
the Name is:
alsa_output.usb-C-Media_Electronics_Inc._USB_Audio_Device-00.analog-stereo。
the Monitor Source is:
alsa_output.usb-C-Media_Electronics_Inc._USB_Audio_Device-00.analog-stereo.m onitor。
the Name of the Monitor Source is the Name corresponding to the signal sink, and a mark of 'Monitor' is added behind the Name corresponding to the signal sink.
And then, configuring an advanced Linux sound architecture configuration file in the first terminal according to the name of the monitor so that the monitor is added into the first terminal to be used as a source.
The effect based on Monitor Source is: under the condition of not influencing the normal output of the audio, the audio information output by the information sink is acquired in a recording mode, PCM (Pulse Code Modulation) data is captured, and the captured PCM data can be checked, so that the correctness of data transmission under the audio link is ensured.
The present embodiment adds the monitor of the first terminal as a source to the first terminal by configuring the ALSA profile (advanced Linux sound architecture profile) in the first terminal. The present embodiment takes configuring the asound. conf configuration file in the first terminal as an example, the following codes may be added to the asound. conf configuration file:
in the above codes, the monitor is the name of the monitor of the first terminal, and the monitor can be added to the first terminal to be used as the source through the above codes.
After the configuration of the as. conf configuration file is completed, the PulseAudio Audio server is checked using the pactl list command, and a Device named as alsa _ output.usb-C-Media _ Electronics _ Inc. _ USB _ Audio _ Device-00.analog-stereo.monitor can be found among the Audio virtual devices supported in the listed PulseAudio Audio servers. Fig. 4a is a first information screenshot of the PulseAudio audio server of the first terminal extracted after the monitor is set as the information source according to this embodiment. As shown in fig. 4a, the Source is found according to its Name, its corresponding Source ID number is Source # 9, and its current State (State) is IDLE State (IDLE). When the audio data output by the source is played on the second terminal, the state of the source can be seen to be switched to the running state. Fig. 4b is a second information screenshot of the PulseAudio audio server of the first terminal extracted after the monitor is set as the information source according to this embodiment. As shown in fig. 4b, when the audio data is played, if the pulse audio server is checked by using the pactl list command, it can be seen that the current State (State) of the Source # 9 is switched to the RUNNING State (RUNNING).
From the above-described variations of fig. 4a to 4b, it can be demonstrated that the alsa _ output.usb-C-Media _ Electronics _ Inc. _ USB _ Audio _ Device-00.analog-stereo.monitor Device (i.e., the monitor of Sink # 5) has been successfully added as a source Device and can support external access.
Note that, in the PulseAudio audio server, the "Name" of the source is identified by an input, for example, "alsa _ input". times.in 3a and 3b, and in this step, since the monitor of the sink is converted into the source to be added to the first terminal, the Name of the added source is "alsa _ output". times..
S203: and sending the audio data in the information source to the second terminal according to the IP address of the second terminal.
The server 100 configures the first terminal according to the IP address of the second terminal, so that the source configured by the monitor directly obtains the audio data and sends the audio data to the second terminal. The second terminal may then play the audio data received from the first terminal.
The implementation realizes the sharing of audio data between the first terminal and the second terminal by configuring Gstreamer pipeline data, wherein the Gstreamer-based audio data has a flexible expansion function:
1) for the first terminal: the server 100 configures the Gstreamer pipe data of the first terminal according to the IP address of the second terminal and the name of the monitor of the first terminal to transmit the audio data in the source of the first terminal to the second terminal. Taking Source # 9 used by the Source in step S202 as an example, the Gstreamer pipeline data configuration code is as follows:
gst-launch-1.0-v pulsesrc device＝
alsa_output.usb-C-Media_Electronics_Inc._USB_Audio_Device-00.analog-stereo.m onitor！queue2！audioconvert！audioresample！mulawenc！rtppcmupay pt＝96！udpsink host＝192.168.50.180port＝8888
where, alias _ output.usb _ Device-00.analog-stereo is the name of the source, i.e. the name of the monitor of the original sink, pulsorc is the source element whose attribute Device specifies the source Device, queue2 is the buffer element, audioswitch is the Audio conversion element for format adaptive matching, audioresamplele is the Audio resampling, mulewenc is the Audio encoder, rtcmupay is the packing element of Audio rtp packet data, pt 96 represents the packet length, udp output element host attribute specifies the address sent to the Device, 192.168.50.180 is the IP address of the second terminal, port attribute specifies the port number, 88is port number 88.
2) For the second terminal, the server 100 configures the Gstreamer pipe data of the second terminal according to the configured port number in the Gstreamer pipe data of the first terminal, so that the second terminal plays the audio data received by the second terminal through the audiolink.
Taking the configuration data of the first terminal in the step as an example, correspondingly, the configuration code of the Gstreamer pipeline data of the second terminal is as follows:
gst-launch-1.0-v udpsrc port＝8888！application/x-rtp,clock-rate＝8000,payload＝96！rtppcmudepay！mulawdec！audio/x-raw,format＝S16LE,layout＝interleaved！audioconvert！audioresample！autoaudiosink
wherein the autoaudionink is an audio output plug-in a Gstreamer pipeline.
Through the configuration, the second terminal can directly acquire the audio data sent by the UDP protocol, and under the condition that network packet loss is not considered, the audio data is completely consistent with the audio PCM data output by the first terminal as an information sink, so that the second terminal can synchronously play the audio data played by the first terminal.
Based on the above implementation process, it can be seen that the audio sharing method provided in this embodiment not only can implement sharing of audio resources among terminals and implement synchronous playing of audio data, but also can directly convert a monitor of an information sink into an information source for use because the monitor of the information sink obtains audio data output by the information sink in a recording manner and captures PCM data, thereby greatly reducing other interferences such as noise and the like in the audio resource sharing process, and ensuring that the sound quality is basically lossless. In addition, when the monitor is added to the first terminal as a source, the sink is not deleted from the list of the sink, so that after the source is added, the previous sink can be found in the device of the sink, and further, the audio sharing method provided by the embodiment does not affect the audio playing of the original terminal (the first terminal).
Based on the same inventive concept as the audio sharing method, the embodiment also provides an audio sharing device. Fig. 5 is a schematic diagram of a basic structure of an audio sharing device according to an embodiment of the present disclosure. As shown in fig. 5, the apparatus mainly includes:
the first terminal confirmation module 510: and if the second terminal is confirmed to need to share the audio resource, acquiring the first terminal which is playing the audio resource currently.
The source setting module 520: and the audio data playing by the first terminal is used as a signal source and is added into the configuration file of the advanced Linux sound system structure in the first terminal.
The data transmission module 530: and the audio data in the information source is sent to the second terminal according to the IP address of the second terminal.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for apparatus or system embodiments, since they are substantially similar to method embodiments, they are described in relative terms, as long as they are described in partial descriptions of method embodiments. The above-described embodiments of the apparatus and system are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed 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. One of ordinary skill in the art can understand and implement it without inventive effort.
The foregoing is merely a detailed description of the invention, and it should be noted that modifications and adaptations by those skilled in the art may be made without departing from the principles of the invention, and should be considered as within the scope of the invention.
Claims (9)
1. A method for audio sharing, the method comprising:
if the second terminal is confirmed to need to share the audio resource, the first terminal which is playing the audio resource currently is obtained;
adding the audio data played by the first terminal as an information source into an advanced Linux sound system structure configuration file in the first terminal;
sending the audio data in the information source to the second terminal according to the IP address of the second terminal;
wherein the acquiring of the first terminal currently playing the audio resource comprises:
checking the PulseAudio sound server by using a pactl list instruction, and acquiring a terminal which is used as a signal sink;
and taking the terminal which is taken as the information sink and has the corresponding information sink port state converted from the idle state to the use state from the time of playing the audio resource to the time of playing the audio resource as the first terminal.
2. The method according to claim 1, wherein adding audio data played by the first terminal as a source to an advanced Linux sound architecture profile in the first terminal comprises:
using a pactl list instruction to acquire the name of the monitor of the first terminal in the PulseAudio server;
and configuring an advanced Linux sound architecture configuration file in the first terminal according to the name of the monitor so that the monitor is added into the first terminal to be used as a source.
3. The method according to claim 1 or 2, wherein the advanced Linux sound architecture profile is an as.
4. The method of claim 2, wherein transmitting the audio data in the source to the second terminal according to the IP address of the second terminal comprises:
and configuring Gstreamer pipeline data of the first terminal according to the IP address of the second terminal and the name of the monitor so as to send the audio data in the information source to the second terminal.
5. The method of claim 4, further comprising:
and configuring the Gstreamer pipeline data of the second terminal according to the configured port number in the Gstreamer pipeline data of the first terminal, so that the second terminal plays the audio data received by the second terminal through the autoaudiosink.
6. The method of claim 1, wherein the method for confirming that the second terminal needs to share the audio resource comprises:
after receiving information that a user plays audio data by using audio playing equipment and the spatial position of the user changes, judging whether a second terminal capable of playing the audio data exists in the space where the target place of the user is located;
and if so, judging that the second terminal needs to share the audio resource.
7. An audio sharing apparatus, the apparatus comprising:
the first terminal confirmation module: if the second terminal is confirmed to need to share the audio resource, the first terminal which is playing the audio resource currently is obtained;
the information source setting module: the audio data playing by the first terminal is used as an information source and is added into an advanced Linux sound system structure configuration file in the first terminal;
a data sending module: the audio data in the information source is sent to the second terminal according to the IP address of the second terminal;
wherein, the acquiring, by the first terminal confirmation module, the first terminal currently playing the audio resource includes:
checking the PulseAudio sound server by using a pactl list instruction, and acquiring a terminal which is used as a signal sink;
and taking the terminal which is taken as the information sink and has the corresponding information sink port state converted from the idle state to the use state from the time of playing the audio resource to the time of playing the audio resource as the first terminal.
8. An audio sharing system, comprising a server, a terminal capable of playing audio data and communicatively connected to the server, wherein the server is configured to perform the method of any one of claims 1 to 6.
9. The system of claim 8, further comprising a user location acquisition device communicatively coupled to the server, wherein:
the user position acquisition device is configured to acquire a user position and send acquired data to the server.
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