CN108446092B - Audio output method, audio output device, audio output apparatus, and storage medium - Google Patents
Audio output method, audio output device, audio output apparatus, and storage medium Download PDFInfo
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- CN108446092B CN108446092B CN201810183893.6A CN201810183893A CN108446092B CN 108446092 B CN108446092 B CN 108446092B CN 201810183893 A CN201810183893 A CN 201810183893A CN 108446092 B CN108446092 B CN 108446092B
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- G06F3/16—Sound input; Sound output
- G06F3/162—Interface to dedicated audio devices, e.g. audio drivers, interface to CODECs
Abstract
The application discloses an audio output method, an audio output device, equipment and a storage medium. The audio output method comprises the following steps: respectively decoding the multi-channel audio data into PCM audio data; respectively packaging PCM audio data according to the output channel information of each audio data, wherein the packaged data is called a PCM transmission packet, and the PCM transmission packet comprises the output channel information; and carrying out corresponding audio processing on the PCM audio data according to the output channel information of the PCM transmission packet, and outputting the PCM audio data to corresponding audio output equipment so as to realize audio playing at the same time. According to the technical scheme provided by the embodiment of the application, the front end decodes and packs different audio data into a PCM transmission packet, and the transmission packet comprises output channel information; the rear end can solve the problem that the audio cannot be played simultaneously under the multi-screen mode of the existing terminal equipment by setting audio processing corresponding to the output channel information.
Description
Technical Field
The present disclosure relates generally to the field of audio playback, and more particularly, to an audio output method, an audio output apparatus, a device, and a storage medium.
Background
Terminal devices with voice call functions (such as smart televisions, mobile phones, tablet computers, PCs, etc.) support the output of a variety of audio devices. A terminal equipment is itself just from taking earphone, a plurality of sound output devices such as speaker, bluetooth headset, and the external equipment of confetti eight doors, for example through HDMI audio output, bluetooth, modes such as wifi are connected, make the output of sound have more the variety. In order to support such a plurality of audio device connections, the terminal device provides a set of audio control framework and mechanism, and can realize automatic switching of audio devices through an event mechanism and also can realize active switching at a user level.
Although an audio channel switching mechanism is provided, corresponding audio cannot be played simultaneously for multiple screens under the condition of multiple screen different display. The user experience is very poor, with audio output being a miscellaneous audio even with audio.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide an audio output method, an audio output device, an apparatus, and a storage medium for simultaneously playing multiple audios.
In a first aspect, an audio output method is provided, the method including:
respectively decoding the multi-channel audio data into PCM audio data;
Respectively packaging PCM audio data according to the output channel information of each audio data, wherein the packaged data is called a PCM transmission packet, and the PCM transmission packet comprises the output channel information;
and carrying out corresponding audio processing on the PCM audio data according to the output channel information of the PCM transmission packet, and outputting the PCM audio data to corresponding audio output equipment so as to realize audio playing at the same time.
In one or more embodiments of the present invention, separately packing PCM audio data according to output channel information of each audio data includes:
setting output channel information, a counter and data length as a packet header of a PCM transmission packet, wherein the counter is used for recording the number of the transmission packets so as to be convenient for playing audio in a packaging sequence, and the data length is used for recording the size of PCM data in the transmission packets;
the PCM audio data is grouped into data of a fixed size and used as data of a PCM transport packet.
In one or more embodiments of the present invention, performing audio processing on PCM audio data according to output channel information of a PCM transport packet includes:
saving the PCM transmission packet to a buffer according to the counter information;
and the PCM transmission packets in the buffer are respectively sent to corresponding channel injectors according to the output channel information, the channel injectors are used for configuring audio output settings required by the output channels, and each audio channel is respectively provided with a channel injector.
In one or more embodiments of the invention, saving the PCM transport packets to the buffer based on the counter information comprises:
and according to the counter value, buffering the PCM transmission packets in the order from small to large.
In one or more embodiments of the invention, setting audio output settings required for an output channel includes: the sample rate, number of audio channels and number of sample bits of the injector are set.
In one or more embodiments of the invention, the buffer is a first-in-first-out ring buffer.
In a second aspect, an audio output device is provided, the device comprising:
a decoding unit: configured to decode the plurality of channels of audio data into PCM audio data, respectively;
a packing unit: the PCM audio data transmission method comprises the steps that PCM audio data are configured and used for being respectively packaged according to output channel information of each audio data, the packaged data are called PCM transmission packets, and the PCM transmission packets contain the output channel information;
an output unit: the audio processing device is configured to perform corresponding audio processing on the PCM audio data according to the output channel information of the PCM transmission packet, and output the PCM audio data to corresponding audio output equipment so as to realize audio playing at the same time.
In one or more embodiments of the present invention, the packing unit includes:
Determining a packet head unit: configuring a packet header for setting output channel information, a counter and a data length as PCM transmission packets, wherein the counter is used for recording the number of the transmission packets so as to play audio conveniently according to a packaging sequence, and the data length is used for recording the size of PCM data in the transmission packets;
determining a data unit: the PCM audio data is configured to be grouped into data of a fixed size and used as data of a PCM transport packet.
In one or more embodiments of the present invention, the output unit includes:
a buffer unit: configured to store the PCM transport packets to a buffer based on the counter information;
an injection unit: the PCM transmission packets configured in the buffer are respectively sent to corresponding channel injectors according to the output channel information, the channel injectors are used for configuring audio output settings required by the output channels, and each audio channel is respectively provided with a channel injector.
In one or more embodiments of the present invention, a buffer unit includes:
a sorting unit: configured to store the PCM transport packets in descending order according to the counter value.
In one or more embodiments of the present invention, the injection unit includes:
a setting unit: configured to set the injector's sampling rate, number of audio channels, and number of sampling bits.
In one or more embodiments of the invention, the buffer is a first-in-first-out ring buffer.
In a third aspect, an audio playback device is provided, the device comprising:
one or more processors;
a memory for storing one or more programs,
the one or more programs, when executed by the one or more processors, cause the one or more processors to perform the audio output methods of the embodiments provided herein.
In a fourth aspect, a computer-readable storage medium storing a computer program is provided, wherein the program is configured to implement an audio output method in each embodiment provided by the present invention when executed by a processor.
According to the technical scheme provided by the embodiment of the application, the front end decodes and packs different audio data into a PCM transmission packet, and the transmission packet comprises output channel information; the rear end can solve the problem that the audio cannot be played simultaneously under the multi-screen mode of the existing terminal equipment by setting audio processing corresponding to the output channel information.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
Fig. 1 shows an exemplary flowchart of an audio output method according to an embodiment of the present application;
FIG. 2 shows an exemplary flowchart of the packing method of step S20 according to an embodiment of the present application;
FIG. 3 illustrates an exemplary diagram of a PCM transport packet according to an embodiment of the present application;
FIG. 4 shows an exemplary flowchart of the output method of step S30 according to an embodiment of the present application;
fig. 5 shows an exemplary flowchart of the buffering method of step S301 according to an embodiment of the present application;
FIG. 6 shows an exemplary flow chart of an audio output method according to another embodiment of the present application;
fig. 7 shows an exemplary structural block diagram of an audio output apparatus according to an embodiment of the present application;
fig. 8 shows an exemplary structural block diagram of an audio playing device according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, an exemplary flowchart of an audio output method according to an embodiment of the present application is shown. As shown in the figure, the audio output method includes:
step S10: respectively decoding the multiple channels of audio data into PCM (Pulse Code Modulation) audio data;
step S20: respectively packaging PCM audio data according to the output channel information of each audio data, wherein the packaged data is called a PCM transmission packet, and the PCM transmission packet comprises the output channel information;
step S30: and performing corresponding audio processing on the PCM audio data according to the output channel information of the PCM transmission packet, and outputting the PCM audio data to corresponding audio output equipment so as to realize the simultaneous output of different audios.
In step S10, audio data that needs to be played simultaneously is decoded into PCM audio data. In practical application, after a playing file is specified, the compression format of the audio file is judged, and a corresponding algorithm is selected to convert the audio playing file into PCM data in real time. It can be understood that the number of the playing files can be any number to meet the requirements of different screen numbers. That is, if the playback file is 2, the audio can be played simultaneously for two screens, if the playback file is 3, the audio can be played simultaneously for three screens, and so on.
In step S20, the converted PCM audio data is packed into a PCM transport packet, where the PCM transport packet includes output channel information, and an output device of the audio can be determined by the output channel information, that is, the output channel information corresponds to the audio output device.
In step S30, according to the output channel information of the PCM transport packet, audio processing of the corresponding channel is performed, so as to achieve the purpose of playing audio on different audio output devices at the same time.
Referring to fig. 2 and 3, fig. 2 shows an exemplary flowchart of the packing method of step S20 according to the embodiment of the present application; FIG. 3 illustrates an exemplary diagram of a PCM transport packet according to an embodiment of the present application; . As shown in the figure, the packaging method comprises the following steps:
step S201: setting output channel information, a counter and data length as a packet header of a PCM transmission packet, wherein the counter is used for recording the number of the transmission packets so as to be convenient for playing audio in a packaging sequence, and the data length is used for recording the size of PCM data in the transmission packets;
step S202: the PCM audio data is grouped into data of a fixed size and used as data of a PCM transport packet.
The packaging is that a packet head is added to PCM data with fixed size to form a transmission packet, which is convenient for distinguishing transmission channels and audio channels. The format is shown in fig. 3, the channel number indicates through which audio output channel the transmission packet is to be output; the counter records the number of the transmission packets which are packaged currently, so that PCM data can be played in sequence conveniently; the data length records the size of the PCM data carried by the transport packet.
Referring next to fig. 4, an exemplary flowchart of the output method of step S30 according to an embodiment of the present application is shown. As shown in the figure, the output method includes:
step S301: saving the PCM transmission packet to a buffer according to the counter information;
step S302: and the PCM transmission packets in the buffer are respectively sent to corresponding channel injectors according to the output channel information, the channel injectors are used for configuring audio output settings required by the output channels, and each audio channel is respectively provided with a channel injector.
In step S301, the transport packets are stored for the real-time packetizing order of the multicasted audio data according to step S20.
In step S302, a corresponding channel injector, such as a configurable HDMI injector, a headphone injector, a speaker injector, a bluetooth headphone injector, etc., is configured for each audio output channel. Each channel injector includes at least two functions: firstly, injecting related PCM data into the audio output channel and configuring audio output setting required by the output channel; second, the audio output channel is opened.
An exemplary workflow of a channel injector is given as follows:
Referring to fig. 5, an exemplary flowchart of the buffering method of step S301 according to an embodiment of the present application is shown. As shown in the figure, the buffering method includes:
step S401: and according to the counter value, buffering the PCM transmission packets in the order from small to large.
In step S401, the transport packets stored each time are sorted according to the size of the counter. So that the PCM transport packet holding order in the buffer is consistent with the packing order.
In particular, the buffer can adopt a ring buffer, and the sorting of the transmission packets is realized by a data link table. Each audio output channel corresponds to one data linked list, and if two audios need to be played, the two data linked lists can be adopted to store audio data respectively.
Referring to fig. 6, an exemplary flowchart of an audio output method of another embodiment is shown. For ease of understanding, the application of the audio output method of the present invention to the field of dual-screen easy display is given. In this embodiment, the audio playback file 1 and the audio playback file 2 that need to be played on the large screen and the small screen respectively are included, and the audio output of the audio playback file supports HDMI audio output, headphone output, speaker output, bluetooth headphone output, other output devices, and the like. And storing the decoded and packed data into a ring buffer. In the ring buffer, the transmission packets are stored in a decoding and packaging sequence and sent to the channel injector corresponding to the output channel information, wherein the transmission packet 1 in the buffer corresponds to the decoding and packaging data packet of the playing file 1, and the transmission packet 2 corresponds to the decoding and packaging data packet of the playing file 2. In the present embodiment, two audio playback files are involved, and therefore the number of corresponding channel injectors is also two. The audio output devices selected in this embodiment are HDMI audio output devices and headphone output devices, and corresponding channel injectors are set. In the ring buffer, the transport packets 1 and 2 are alternately stored, and in practical applications, the transport packets may be stored separately according to needs and habits, and the storage location is not limited herein. After being processed by the injector, the single audio is played on the audio output equipment, thereby solving the problem that the existing playing mechanism plays mixed audio when playing multiple audios.
The invention provides an audio output device. Referring to fig. 7, an exemplary block diagram of an audio output device 100 according to an embodiment of the present application is shown. As shown, an audio output device includes:
the decoding unit 110: configured to decode the plurality of channels of audio data into PCM audio data, respectively;
the packing unit 120: the PCM audio data transmission method comprises the steps that PCM audio data are configured and used for being respectively packaged according to output channel information of each audio data, the packaged data are called PCM transmission packets, and the PCM transmission packets contain the output channel information;
the output unit 130: the audio processing device is configured to perform corresponding audio processing on the PCM audio data according to the output channel information of the PCM transmission packet, and output the PCM audio data to corresponding audio output equipment so as to realize audio playing at the same time.
The audio output device 100 shown in fig. 7 can correspondingly perform the audio output method shown in fig. 1.
In some embodiments, the packing unit 120 includes:
the packet header determining unit 121: configuring a packet header for setting output channel information, a counter and a data length as PCM transmission packets, wherein the counter is used for recording the number of the transmission packets so as to play audio conveniently according to a packaging sequence, and the data length is used for recording the size of PCM data in the transmission packets;
Determine data unit 122: the PCM audio data is configured to be grouped into data of a fixed size and used as data of a PCM transport packet.
The packing unit 120 shown in fig. 7 may correspondingly perform the packing method shown in fig. 2.
In some embodiments, the output unit 130 includes:
the buffer unit 131: configured to store the PCM transport packets to a buffer based on the counter information;
the injection unit 132: the PCM transmission packets configured in the buffer are respectively sent to corresponding channel injectors according to the output channel information, the channel injectors are used for configuring audio output settings required by the output channels, and each audio channel is respectively provided with a channel injector.
In some embodiments, the buffer unit 131 includes:
a sorting unit: configured to store the PCM transport packets in descending order according to the counter value.
In some embodiments, the injection unit 132 includes:
a setting unit: configured to set the injector's sampling rate, number of audio channels, and number of sampling bits.
In some embodiments, the buffer is a ring buffer.
Referring now to fig. 8, shown is a block diagram of an exemplary structure of an audio playback device according to an embodiment of the present application.
As shown in fig. 8, as another aspect, the present application also provides an apparatus 200 including one or more Central Processing Units (CPUs) 201 that can perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM)202 or a program loaded from a storage section 208 into a Random Access Memory (RAM) 203. In the RAM 203, various programs and data necessary for the operation of the system 200 are also stored. The CPU 201, ROM202, and RAM 203 are connected to each other via a bus 204. An input/output (I/O) interface 205 is also connected to bus 204.
The following components are connected to the I/O interface 205: an input portion 206 including a keyboard, a mouse, and the like; an output section 207 including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker; a storage section 208 including a hard disk and the like; and a communication section 209 including a network interface card such as a LAN card, a modem, or the like. The communication section 209 performs communication processing via a network such as the internet. A drive 210 is also connected to the I/O interface 205 as needed. A removable medium 211 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 210 as necessary, so that a computer program read out therefrom is mounted into the storage section 208 as necessary.
In particular, the process described above with reference to fig. 1 may be implemented as a computer software program, according to an embodiment of the present disclosure. For example, embodiments of the present disclosure include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program comprising program code for performing an audio output method. In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 209 and/or installed from the removable medium 211.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
As another aspect, the present application also provides a computer-readable storage medium, which may be the computer-readable storage medium included in the apparatus in the above-described embodiments; or it may be a separate computer readable storage medium not incorporated into the device. The computer readable storage medium stores one or more programs for use by one or more processors in performing the audio output methods described herein.
The units or modules described in the embodiments of the present application may be implemented by software or hardware. The described units or modules may also be provided in a processor, for example, each of the described units may be a software program provided in a computer or a mobile intelligent device, or may be a separately configured hardware device. Wherein the designation of a unit or module does not in some way constitute a limitation of the unit or module itself.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (8)
1. An audio output method, characterized in that the method comprises:
Respectively decoding the multi-channel audio data into PCM audio data;
packing the PCM audio data according to the output channel information of each audio data, respectively, where the packed data is referred to as a PCM transport packet, the PCM transport packet includes the output channel information, and packing the PCM audio data according to the output channel information of each audio data includes:
setting the output channel information, a counter and a data length as a packet header of the PCM transmission packet, wherein the counter is used for recording the number of the transmission packets so as to be convenient for playing audio in a packaging sequence, and the data length is used for recording the size of PCM data in the transmission packets;
forming the PCM audio data into data with a fixed size, and using the data as the data of the PCM transmission packet;
performing corresponding audio processing on the PCM audio data according to the output channel information of the PCM transmission packet, and outputting the PCM audio data to corresponding audio output equipment to realize audio playing at the same time, where performing corresponding audio processing on the PCM audio data according to the output channel information of the PCM transmission packet includes:
saving the PCM transport packet to a buffer according to the counter information, comprising: according to the counter value, caching the PCM transmission packets in a descending order;
And the PCM transmission packets in the buffer are respectively sent to corresponding channel injectors according to the output channel information, the channel injectors are used for configuring audio output settings required by output channels, and each audio channel is respectively provided with a channel injector.
2. The audio output method of claim 1, wherein the configuring the audio output settings required by the output channels comprises: the sample rate, number of audio channels and number of sample bits of the injector are set.
3. The audio output method according to claim 1, wherein the buffer is a ring buffer.
4. An audio output device, characterized in that the device comprises:
a decoding unit: configured to decode the plurality of channels of audio data into PCM audio data, respectively;
a packing unit: the PCM audio data are respectively packed according to the output channel information of each audio data, the packed data are called PCM transmission packets, and the PCM transmission packets contain the output channel information;
the packing unit includes:
determining a packet head unit: configuring a packet header used for setting the output channel information, a counter and a data length as the PCM transmission packet, wherein the counter is used for recording the number of the transmission packets so as to be convenient for playing audio in a packaging sequence, and the data length is used for recording the size of PCM data in the transmission packets;
Determining a data unit: is configured to constitute the PCM audio data into fixed-size data as data of the PCM transport packet
An output unit: the audio processing device is configured to perform corresponding audio processing on the PCM audio data according to the output channel information of the PCM transmission packet, and output the PCM audio data to corresponding audio output equipment so as to realize audio playing at the same time;
the output unit includes:
a buffer unit: configured to store the PCM transport packets to a buffer according to the counter information;
the buffer unit includes:
a sorting unit: the counter is configured to store the PCM transmission packets in a descending order according to the counter value;
an injection unit: and the PCM transmission packets configured in the buffer are respectively sent to corresponding channel injectors according to the output channel information, the channel injectors are used for configuring audio output settings required by output channels, and each audio channel is respectively provided with a channel injector.
5. The audio output device according to claim 4, wherein the injection unit includes:
a setting unit: configured to set the injector's sampling rate, number of audio channels, and number of sampling bits.
6. The audio output device according to claim 4, wherein the buffer is a ring buffer.
7. An audio playback apparatus, characterized in that the apparatus comprises:
one or more processors;
a memory for storing one or more programs,
the one or more programs, when executed by the one or more processors, cause the one or more processors to perform the audio output method of any of claims 1-3.
8. A computer-readable storage medium storing a computer program, characterized in that the program, when executed by a processor, implements the audio output method according to any one of claims 1 to 3.
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| CN112533056B (en) * | 2019-09-17 | 2022-10-28 | 海信视像科技股份有限公司 | Display device and sound reproduction method |
| CN116471351B (en) * | 2022-01-10 | 2024-04-09 | 荣耀终端有限公司 | Method and device for transmitting call audio data |
| CN114697401A (en) * | 2022-03-14 | 2022-07-01 | 广州广哈通信股份有限公司 | Audio data transmission method |
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