CN112799631A - Optimization system and optimization method for controlling DSP (digital signal processor) on android system - Google Patents
Optimization system and optimization method for controlling DSP (digital signal processor) on android system Download PDFInfo
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Abstract
The invention discloses an optimization system and an optimization method for controlling a DSP (digital signal processor) on an android system, which belong to the field of vehicle-mounted entertainment, and the optimization system for controlling the DSP on the android system comprises the following steps: the device comprises a control unit, a DSP unit and a playing unit; the invention provides a method for setting up a single control hardware abstraction layer submodule function, a DSP control flow sends a message to the control hardware abstraction layer submodule layer, when an interface is set to set sound effect, an APP calls a corresponding interface of an automobile audio manager module, then an automobile audio service module transmits sound effect parameters set by the APP to the corresponding interface of the control hardware abstraction layer submodule through an audio system framework android HIDL, and the control hardware abstraction layer submodule is transmitted to the DSP module.
Description
Technical Field
The invention discloses an optimization system and an optimization method for controlling a DSP (digital signal processor) on an android system, and belongs to the field of vehicle-mounted entertainment.
Background
Android enters a vehicle-mounted entertainment system by virtue of good human-computer interaction advantages, but when music is played, great differences exist between vehicle-mounted Audio and mobile phone Audio: when the vehicle-mounted Audio plays music, the music can be finally output to hardware equipment for playing after sound effect processing is carried out on the DSP.
And the Android end and the DSP end do not have corresponding function realization on a native Android architecture, so that the Android end and the DSP end can be communicated in a mode of low code coupling degree and clear Android frame.
Based on the above two points, the DSP control flow and Audio data flow are transmitted through the Audio HAL, which has the problems of high code coupling degree, unclear overall Audio framework, and the like.
Disclosure of Invention
The purpose of the invention is as follows: an optimization system and an optimization method for controlling a DSP on an android system are provided to solve the above problems.
The technical scheme is as follows: an optimization system for controlling a DSP on an android system comprises:
the control unit is used for playing music and music software APP on the android system;
the DSP unit is used for processing the audio data signals and transmitting audio data and control data;
and the playing unit is used for playing music through the vehicle-mounted sound box.
Preferably, the DSP unit includes:
the DSP module is used for receiving and optimizing the control signal and the audio data signal and outputting the optimized audio data to the playing equipment;
the audio data transmission module is used for transmitting audio data signals output by the music software APP;
and the DSP control transmission module is used for transmitting the DSP control data signal.
Preferably, the DSP control transmission module includes:
the DSP channel control transmission channel submodule is used for transmitting DSP channel control flow data;
the DSP sound effect control transmission channel submodule is used for transmitting DSP sound effect control streaming data;
and the control hardware abstraction layer submodule is used for receiving the DSP control flow data and realizing the separated work of the audio data control flow and the DSP control flow.
Preferably, the DSP channel control transmission channel submodule includes:
the audio manager module is used for receiving the DSP channel control flow, applying for an audio focus and outputting the audio focus after the audio focus is applied;
and the audio service module is used for receiving the DSP channel control flow sent and output by the audio manager module and providing volume control and volume mode selection services for the user.
Preferably, the DSP sound effect control transmission channel sub-module includes:
the automobile audio manager module is used for receiving the DSP sound effect control flow and setting and outputting various parameters of audio sound effects;
the car Audio frequency service module, be used for receiving the DSP Audio effect control flow of car Audio frequency manager module output with the DSP Audio effect control flow of Audio frequency service module output, and export extremely through Audio system frame Audio HIDL the DSP hardware abstraction layer submodule.
Preferably, the audio data transmission module includes:
a music track sub-module for performing control of each part of the transmission music so as to control the audio data at a specific position;
the audio trigger submodule is used for carrying out memory caching on audio data in a memory sharing mode;
the mixing thread sub-module is used for outputting audio data after mixing the audio data;
the audio hardware abstraction layer submodule is used for receiving the audio data stream and controlling and outputting the audio data stream;
and the sound card submodule is used for receiving and converting the audio signal and outputting the audio signal to the DSP module.
An optimization method for an optimization system for controlling a DSP on an android system is characterized in that a single control hardware abstraction layer submodule function is built, and a DSP control flow sends a message to the control hardware abstraction layer submodule, so that the logic of separating an audio data control flow and the DSP control flow is realized, and the problem of high code coupling degree is solved; the method comprises the following specific steps:
step 1, music software android APP starts to play music;
step 2, carrying out audio optimization;
step 21, firstly, an audio manager module needs to apply for an audio focus;
step 22, after the audio focus is applied, sending a DSP control channel message to a control hardware abstraction layer submodule in an automobile audio service module through an audio system framework android HIDL;
step 23, the control hardware abstraction layer submodule forwards the channel message to the DSP module;
24, the DSP module selects a channel to play a sound source which is currently applied to the focus;
and 3, outputting the audio data to hardware playing equipment by the DSP module.
Preferably, after the sound source focus is applied, the current APP is informed to start playing music, that is, the APP writes audio data into the audio track submodule, the audio data is written into the memory buffer of the audio trigger submodule in a memory sharing manner, when the audio data buffer meets corresponding conditions, the mixed thread submodule thread starts to be started to write the audio data into the output layer Stream Out of the audio hardware abstraction layer submodule, then the audio hardware abstraction layer submodule in the audio data transmission module is controlled to open the sound card of the sound card submodule, the audio data is written into the corresponding sound card, and finally the audio data is output to the hardware playing device through the DSP.
Preferably, when the interface is set to set the audio, the APP calls the corresponding interface of the car audio manager module, then the car audio service module transmits the audio parameter set by the APP to the corresponding interface of the control hardware abstraction layer sub-module through the android HIDL of the audio system framework, and the control hardware abstraction layer sub-module transmits the audio parameter to the DSP module.
Has the advantages that: the invention provides a method for setting up a single control hardware abstraction layer submodule function, a DSP control flow sends a message to the control hardware abstraction layer submodule layer, when an interface is set to set sound effect, an APP calls a corresponding interface of an automobile audio manager module, then an automobile audio service module transmits sound effect parameters set by the APP to the corresponding interface of the control hardware abstraction layer submodule through an audio system framework android HIDL, and the control hardware abstraction layer submodule is transmitted to the DSP module.
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FIG. 1 is a flow chart of the operation of the present invention.
Fig. 2 is a system operation block diagram of the present invention.
FIG. 3 is a block diagram of the DSP unit of the present invention.
Fig. 4 is a block diagram of the operation of the audio data transmission module of the present invention.
Fig. 5 is a block diagram of the DSP control transmission module of the present invention.
Detailed Description
As shown in fig. 1, in this embodiment, an optimization system and an optimization method thereof for controlling a DSP on an android system, a control unit, a DSP unit, and a playing unit.
In a further embodiment, the DSP unit comprises: the DSP module and the audio data transmission module are used for controlling the transmission module.
In a further embodiment, the DSP module is configured to receive and optimize the control signal and the audio data signal and output the optimized audio data to the playback device.
In a further embodiment, the audio data transmission module is configured to transmit the audio data signal output by the music software APP.
In a further embodiment, the DSP control transmission module is configured to transmit a DSP control data signal.
In a further embodiment, the DSP control transmission module comprises: a DSP channel control transmission channel submodule, a DSP sound effect control transmission channel submodule and a control hardware abstraction layer submodule.
In a further embodiment, the DSP channel control transmit channel submodule is configured to transmit DSP channel control stream data.
In a further embodiment, the DSP sound effect control transmission channel sub-module is used for transmitting DSP sound effect control stream data.
In a further embodiment, the control hardware abstraction layer sub-module is configured to receive DSP control flow data, and implement separation of the audio data control flow and the DSP control flow.
In a further embodiment, the DSP channel control transmission channel sub-module comprises: an audio manager module and an audio service module.
In a further embodiment, the audio manager module is configured to receive the DSP channel control stream, and apply for audio focus and output the audio focus when the audio focus is applied.
In a further embodiment, the audio service module is configured to receive a control stream of the receiving DSP channel from the audio manager module, and provide a volume control and volume mode selection service to the user.
In a further embodiment, the DSP sound effect control transmission channel sub-module comprises: the system comprises a car audio manager module and a car audio service module.
In a further embodiment, the car audio manager module is configured to receive the DSP sound control stream, and perform setting and outputting of various parameters of the audio sound.
In a further embodiment, the car Audio service module is configured to receive the DSP sound effect control stream output by the car Audio manager module and the DSP sound effect control stream output by the Audio service module, and output the DSP sound effect control stream to the DSP hardware abstraction layer sub-module through an Audio system framework Audio HIDL.
In a further embodiment, the audio data transmission module comprises: the audio track module comprises an audio track submodule, an audio trigger submodule, a mixed thread submodule, an audio hardware abstraction layer submodule and an audio clip module.
In a further embodiment, the soundtrack sub-module is adapted to control each of the parts of the transmitted music to thereby control the audio data at a particular location.
In a further embodiment, the audio trigger submodule is configured to perform memory caching on the audio data in a memory sharing manner.
In a further embodiment, the mixing thread sub-module is configured to mix the audio data lines and output the mixed audio data lines.
In a further embodiment, the audio hardware abstraction layer sub-module receives the audio data stream and performs control output.
In a further embodiment, the sound card sub-module receives and converts the audio signal and outputs the audio signal to the DSP module.
In a further embodiment, the invention provides a function of building a single control hardware abstraction layer submodule, and the DSP control flow sends messages to the control hardware abstraction layer submodule, thereby realizing the logic of separating the audio data control flow and the DSP control flow and solving the problem of high code coupling degree.
An optimization method for an optimization system for controlling a DSP on an android system is characterized in that a single control hardware abstraction layer submodule function is built, and a DSP control flow sends a message to the control hardware abstraction layer submodule, so that the logic of separating an audio data control flow and the DSP control flow is realized, and the problem of high code coupling degree is solved; the method comprises the following specific steps:
step 1, music software android APP starts to play music;
step 2, carrying out audio optimization;
step 21, firstly, an audio manager module needs to apply for an audio focus;
step 22, after the audio focus is applied, sending a DSP control channel message to a control hardware abstraction layer submodule in an automobile audio service module through an audio system framework android HIDL;
step 23, the control hardware abstraction layer submodule forwards the channel message to the DSP module;
24, the DSP module selects a channel to play a sound source which is currently applied to the focus;
and 3, outputting the audio data to hardware playing equipment by the DSP module.
In a further embodiment, after the sound source focus is applied, the current APP is informed to start playing music at the same time, that is, the APP writes audio data into the audio track submodule, and the audio data is written into the memory buffer of the audio trigger submodule in a memory sharing manner, when the audio data buffer meets corresponding conditions, the mixed thread submodule thread is started to write the audio data into the output layer Stream Out of the audio hardware abstraction layer submodule, and then the audio hardware abstraction layer submodule in the audio data transmission module is controlled to open the sound card of the sound card submodule, and the audio data is written into the corresponding sound card, and finally the audio data is output to the hardware playing device through the DSP.
In a further embodiment, when the interface is set to set sound, the APP calls the corresponding interface of the car audio manager module, and then the car audio service module transmits the sound parameters set by the APP to the corresponding interface of the control hardware abstraction layer sub-module through the audio system framework android HIDL, and the control hardware abstraction layer sub-module transmits the sound parameters to the DSP module.
The working principle is as follows: when the android APP starts to play music, firstly, an audio focus is required to be applied to an audio manager module, after the audio focus is applied, DSP control channel information is sent to a control hardware abstraction layer submodule in an automobile audio service module through an android HIDL framework, the control hardware abstraction layer submodule forwards the channel information to the DSP module, namely, one channel of the DSP is selected to play a sound source which is currently applied to the focus;
after the sound source focus is applied, the current APP is informed to start playing music at the same time, namely the APP writes audio data into the audio track submodule, the audio data is written into a memory buffer area of an audio trigger submodule in a memory sharing mode, when the audio data buffer area meets corresponding conditions, a mixed thread submodule thread is started to write the audio data into an output layer Stream Out of an audio hardware abstraction layer submodule, then the audio hardware abstraction layer submodule in an audio data transmission module is controlled to open a sound card of the sound card submodule, the audio data is written into the corresponding sound card, and finally the audio data is output to hardware playing equipment through a DSP;
when setting up the interface and setting up the audio, APP calls the corresponding interface of car audio manager module, and car audio service module transmits the audio parameter that APP set up for the corresponding interface of control hardware abstraction layer submodule through audio system frame android HIDL afterwards, and control hardware abstraction layer submodule transmits the DSP module again.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (9)
1. An optimization system for controlling a DSP on an android system, comprising:
the control unit is used for playing music and music software APP on the android system;
the DSP unit is used for processing the audio data signals and transmitting audio data and control data;
and the playing unit is used for playing music through the vehicle-mounted sound box.
2. The optimization system for controlling DSP on an android system according to claim 1, wherein the DSP unit comprises:
the DSP module is used for receiving and optimizing the control signal and the audio data signal and outputting the optimized audio data to the playing equipment;
the audio data transmission module is used for transmitting audio data signals output by the music software APP;
and the DSP control transmission module is used for transmitting the DSP control data signal.
3. The optimization system for controlling the DSP on the android system according to claim 2, wherein the DSP control transmission module comprises:
the DSP channel control transmission channel submodule is used for transmitting DSP channel control flow data;
the DSP sound effect control transmission channel submodule is used for transmitting DSP sound effect control streaming data;
and the control hardware abstraction layer submodule is used for receiving the DSP control flow data and realizing the separated work of the audio data control flow and the DSP control flow.
4. The optimization system for controlling DSP on an android system of claim 3, wherein the DSP channel control transmission channel submodule comprises:
the audio manager module is used for receiving the DSP channel control flow, applying for an audio focus and outputting the audio focus after the audio focus is applied;
and the audio service module is used for receiving the DSP channel control flow sent and output by the audio manager module and providing volume control and volume mode selection services for the user.
5. The optimizing system for controlling DSP on an android system as claimed in claim 3, wherein the DSP sound effect control transmission channel submodule includes:
the automobile audio manager module is used for receiving the DSP sound effect control flow and setting and outputting various parameters of audio sound effects;
the car audio frequency service module, be used for receiving the DSP audio effect control flow of car audio frequency manager module output with the DSP audio effect control flow of audio frequency service module output, and export extremely through the audio frequency system frame DSP hardware abstraction layer submodule.
6. The optimization system for controlling the DSP on the android system as claimed in claim 1, wherein the audio data transmission module comprises:
a music track sub-module for performing control of each part of the transmission music so as to control the audio data at a specific position;
the audio trigger submodule is used for carrying out memory caching on audio data in a memory sharing mode;
the mixing thread sub-module is used for outputting audio data after mixing the audio data;
the audio hardware abstraction layer submodule is used for receiving the audio data stream and controlling and outputting the audio data stream;
and the sound card submodule is used for receiving and converting the audio signal and outputting the audio signal to the DSP module.
7. An optimization method for an optimization system for controlling a DSP on an android system as claimed in any of claims 2 to 6, the DSP control flow sending messages to the control hardware abstraction layer submodule by building a separate control hardware abstraction layer submodule function; the specific method comprises the following steps:
starting to play music;
carrying out audio optimization;
firstly, an audio manager module is required to apply for an audio focus;
after the audio focus is applied, DSP control channel information is sent to a control hardware abstraction layer submodule in an automobile audio service module through an audio system framework android HIDL;
the control hardware abstraction layer submodule forwards the channel message to the DSP module;
the DSP module selects a channel to play a sound source which is currently applied to a focus;
and the DSP module outputs the audio data to the hardware playing equipment.
8. The optimization method of the optimization system for controlling the DSP on the android system as claimed in claim 7, wherein after the audio source focus is applied, it notifies the current APP to start playing music at the same time, that is, the APP writes audio data into the audio track sub-module, the audio data is written into the memory buffer of the audio trigger sub-module in a memory sharing manner, and when the audio data buffer meets the corresponding condition, it starts the mixed thread sub-module thread to write audio data into the output layer of the audio hardware abstraction layer sub-module, and then controls the hardware abstraction layer sub-module to open the sound card of the sound card sub-module, and writes audio data into the corresponding sound card, and finally the audio data is output to the hardware playing device through the DSP.
9. The optimizing method for the optimizing system of controlling the DSP on the android system as claimed in claim 7, wherein when the interface is set to sound effect, the APP calls the corresponding interface of the car audio manager module, then the car audio service module transmits the sound effect parameters set by the APP to the corresponding interface of the control hardware abstraction layer sub-module through the audio system framework android HIDL, and the control hardware abstraction layer sub-module transmits to the DSP module.
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