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Multiple-zone audio management - System Level Audio
Next Meeting - Thursday
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17 December 2020 - 11:30am CET (AUDIO_HAL CW50)
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- Continuation with Network Audio Synchronization. Next steps.
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Participants
Gunnar Andersson Philippe Robin Unknown User (wassim.filali) Suhasini Raghuram Stephen Lawrence Unknown User (niskandar)
Minutes
Virtual open source conference. GENIVI was recommended to give a talk (Fosdem: biggest open source conference). If we submit anything to the Embedded Mobile and Automotive dev room, we need to have strong code examples.
- Let's evaluate if we have a proposal from the Audio_HAL.
- We don't have to compete with Vehicle-HAL we can submit together. But we can submit our code and see if it's accepted to be presented
- We would need to talk to Piotr to check the current situation in Audio_HAL
- The last date for submitting the abstract is CFP deadline: Friday, 23rd December 2020.
- Description of the event: pre-recording video most probably (news Call for Participation)
- Summary: focused on code (link to github) but other related topics can be added.
- Potential candidate is the proof of concept on github.
- It is important to have something to show, to increase the visibility of this project and potentially get key resources to the Audio_HAL
AVB subject pickup
- From the analysis point of view we are done
- Let's see if we can talk about implementation
- if OpenAvenue is providing the AVB a complete Network Audio Synchronization out of the box, then there is nothing to do, but if not, then this is a potential improvement
- It can also be useful even if it's just showing the integration of the solution to Android.
- AVB can run on software only so the integration can be an implementation target.
- What about working on the integration to show the code before 23rd of December?
- it's gonna a bit hard to almost undoable
- A2B has a pre-liminary linux driver that but we if we can configure this and prepare it for integration that would be a topic for the Fosdem
- is A2B compatible with I2S?
- yes I2S and I2C
- But sort of an emulated I2S and I2C
- is the A2B its own hardware tranciever? yes
- in summary: A2B is a bus transfer of I2S and I2C
- is A2B compatible with I2S?
- Another thing that we can try:
- I2C and I2S lines out of the Android platform and we can have A2B on an external board
- we connect the I2C and I2S to the A2B toolkit to control it
- Android (having: I2C + I2S_1 I2S_2) <==> A2B devkit <==> A2B remote1/remote2
- How does A2B operates if i want to send a stream to both remote 1 and remote 2? I2C has for example Left and right flag
- you could put it in bus slot and configure the slot to be picked up by remote 1 and remote 2
- bus slot is an A2B concept (converted data from I2S to A2B)
- the tranciever of A2B would then multiplex the data to different bus slot
- Yes this idea falls into the scope of Audio_HAL
- Could we take an ALSA device into the linux driver?
- The linux driver in the A2B is already supporting ALSA
- Details about the Bus and audio attribute (Unknown User (wassim.filali) + Suhasini Raghuram)
- We are capable in Android to map a bus according to the attribute
- So each of the remote can become a bus on its own
- it would be useful to send every Audio usage can go to different remote
- Isn't AVB a p2p?
- we can use AVB on a network and work with mac addresses
- AVB being derived from the network, it can do what a network does
- You have two technology to send audio through the network:
- One node to another (A2B)
- Network (AVB)
- so our discussion of the AVB in the Breakdown rework AVB page can have two solutions (AVB and A2B)
- These are the most attractive technologies to work on it
- We can propose this idea as a stepping stone for building a network Audio in Android (A2B + I2S/I2C)
- We can start with small code base and compliment it with plans for the future
- The only problem is that we are not sure how open the Android/A2B topic is
- The software part would be open but the development board (Android + A2B) is hard to get
- Actually this is an advantage point not an issue. We know that the hardware is needed but if we can show that our solution works with Software only, then it's very good
- Devkit software: free but no opensource → there are plans to make it open source (it's in the roadmap)
- Summary: There is an opportunity for Suhasini Raghuram to create a plan, presentation, and show implementation in the Fosdem (if we are able to meet the deadline 23rd December)
- repo + license should be ready
- This is nice because it might trigger the curiosity of some developers
- Need to check from Suhasini Raghuram if the open source part can be done
- Can we check that the presentation could be ready before 23rd of December but the code should be ready before the presentation
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Participants
Gunnar Andersson Philippe Robin Piotr Krawczyk Unknown User (wassim.filali) Suhasini Raghuram Stephen Lawrence Mohan Karthik Unknown User (niskandar)
Minutes
Continuing the session about Network Audio Synchronization and answering questions
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Participants
Gunnar Andersson Philippe Robin Piotr Krawczyk Unknown User (wassim.filali) Johan Suhasini Raghuram Stephen Lawrence Mohan Karthik Chris Simmonds Unknown User (niskandar)
Minutes
Wassim giving a session about Network Audio Synchronization (many additional information came from Mohan Karthik)
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Participants
Gunnar Andersson Philippe Robin Piotr Krawczyk Unknown User (wassim.filali) Unknown User (niskandar)
Minutes
Going through the list of prioritized topics:
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Thursday - 5 November - 11:30am CET
Participants
Gunnar Andersson Philippe Robin Stephen Lawrence Suhasini Raghuram, Unknown User (wassim.filali), Chris Simmonds
Minutes
Review of the list of prioritarized topics
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Thursday - 1 October - 11:30am CEST
Participants
Gunnar Andersson Philippe Robin Stephen Lawrence Suhasini Raghuram Henric Carlsson
apologies: Unknown User (wassim.filali) Unknown User (niskandar)
Minutes
Review the work breakdown structure and update it to get a shared knowledge of the project status before preparing the agenda of the AHAL working session at the tech summit
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Participants
Gunnar Andersson Philippe Robin Stephen Lawrence Unknown User (wassim.filali) Suhasini Raghuram Henric Carlsson Unknown User (niskandar)
Minutes
Updates from last meeting:
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Thursday 17 September - 11:30am CEST
Participants
Gunnar Andersson Stephen Lawrence Henric Carlsson Piotr Krawczyk Unknown User (wassim.filali)
Minutes
Discussion on demo implementation status
Thursday 10 September - 11:30am CEST
Participants
Gunnar Andersson Stephen Lawrence Henric Carlsson Piotr Krawczyk Unknown User (wassim.filali) Philippe Robin
Minutes
Discussion on configuration & demo building & integration of the emulator project, followed by Jira review
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Participants
Gunnar Andersson Stephen Lawrence Henric Carlsson Piotr Krawczyk
Minutes
Discussion on feature content for MS3 demo (MS3 = virtual tech summit scheduled on October 26-30) Gunnar Andersson can you add the notes you took during the call ? thanks
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Participants
Gunnar Andersson Stephen Lawrence Henric Carlsson Piotr Krawczyk Unknown User (niskandar)
Minutes
Going through the previous minutes of the meeting.
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Participants
Suhasini Raghuram Gunnar Andersson Stephen Lawrence Unknown User (niskandar)
Minutes
Going through the previous minutes of the meeting.
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Participants
Philippe Robin Suhasini Raghuram Unknown User (wassim.filali) Unknown User (niskandar) Stephen Lawrence Piotr Krawczyk
Minutes
Going through the previous todo list:
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Participants
Philippe Robin Gunnar Andersson Unknown User (bartoszbialek) Suhasini Raghuram Unknown User (wassim.filali) Unknown User (niskandar) Stephen Lawrence
Minutes
Alternative board for Suhasini, any upadte on that matter?
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Participants
Philippe Robin Gunnar Andersson Piotr Krawczyk Unknown User (bartoszbialek) Henric Carlsson Suhasini Raghuram Unknown User (wassim.filali) Unknown User (niskandar)
Minutes
Should the minutes be more like a transcript?
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Participants
Unknown User (niskandar) Gunnar Andersson Unknown User (zafirulhassan) Piotr Krawczyk Unknown User (bartoszbialek) Unknown User (zafirulhassan)
Minutes
Looking at the history, the best course of action here is to go through the Jira tickets and assign them to start working on them.
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Participants
Unknown User (wassim.filali) Philippe Robin Gunnar Andersson Piotr Krawczyk Unknown User (bartoszbialek) Henric Carlsson Stephen Lawrence Suhasini Raghuram Unknown User (niskandar)
Minutes
Let's start by going through the points that we have gathered last time in PoC Milestones and Work Breakdown.
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Participants
Unknown User (wassim.filali) Unknown User (niskandar) Philippe Robin Gunnar Andersson Piotr Krawczyk Unknown User (bartoszbialek) @Henric Unknown User (zafirulhassan)
Minutes
Introduction to members and new member Zafirul
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Participants
Suhasini Raghuram Unknown User (wassim.filali) Unknown User (niskandar) Philippe Robin Gunnar Andersson Piotr Krawczyk Unknown User (bartoszbialek) @Henric
Minutes
Debriefing of the virtual summit
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Participants
Suhasini Raghuram Unknown User (wassim.filali) Unknown User (niskandar) Philippe Robin Andrii Chepurnyi Harald Bartholomae Ruslan Shymkevych Gunnar Andersson Piotr Krawczyk @Henric
Minutes
Going through the presentation of Wassim
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Anchor AUDIO_HAL_CW18 AUDIO_HAL_CW18
Thursday 30 April - 11:30am CET (AUDIO_HAL_CW18)
| AUDIO_HAL_CW18 | |
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Participants
Philippe RobinSuhasini Raghuram Unknown User (wassim.filali) @Henric Ruslan Shymkevych
apologies: Piotr Krawczyk Unknown User (bartoszbialek)
Minutes
Review of Ruslan's email of 23 April - archive
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Anchor AUDIO_HAL_CW17 AUDIO_HAL_CW17
Thursday 23 April - 11:30am CET (AUDIO_HAL_CW17)
| AUDIO_HAL_CW17 | |
| AUDIO_HAL_CW17 |
Participants
Philippe Robin Piotr Krawczyk Unknown User (bartoszbialek) Suhasini Raghuram Unknown User (niskandar) Unknown User (wassim.filali) @Henric
Minutes
Updates of the tasks done from last week: Wassim, Piotr, Nadim
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Anchor AUDIO_HAL_CW16 AUDIO_HAL_CW16
Thursday 16 April - 11:30am CET (AUDIO_HAL_CW16)
| AUDIO_HAL_CW16 | |
| AUDIO_HAL_CW16 |
Participants
Philippe Robin Gunnar Andersson Piotr Krawczyk Unknown User (bartoszbialek) Suhasini Raghuram Ruslan Murtazin Unknown User (niskandar) Unknown User (wassim.filali) Andrii Chepurnyi @Henric
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- Discuss the gathered topics, who can work on which topics and which strategy
- Status update on the "access raw streams"
Minutes
Changes done in this page Android and System Level Audio:
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Anchor AUDIO_HAL_CW15 AUDIO_HAL_CW15
Thursday 09 April - 11:30am CET (AUDIO_HAL_CW15)
| AUDIO_HAL_CW15 | |
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Participants
Philippe Robin Gunnar Andersson Piotr Krawczyk Unknown User (bartoszbialek)Andrii Chepurnyi@Henric Suhasini Raghuram Stephen Lawrence
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- from last week's minutes
- Discuss the gathered topics, who can work on which topics and which strategy
- Status update on the "access raw streams"
- AOB
- abstract of the GENIVI virtual tech summit AASIG Audio HAL workshop
Minutes
list of gathered topics on multi-zone audio management
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Thursday 02 April - 11:30am CET (AUDIO_HAL_CW14)
Participants
Philippe Robin Gunnar Andersson Piotr Krawczyk Unknown User (bartoszbialek) Unknown User (wassim.filali) Andrii Chepurnyi Unknown User (niskandar) @Henric Suhasini Raghuram
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- Slides from Wassim about the two models inside and outside of AA
- discussion of the cases/features that we are trying to solve
- checking the Audio Manager to decide whether or not it needs an update
Minutes
- 2 strategies or options:
- android provides sources and sinks
- Android controls the complete systems
- We will not discuss the need to have such options
- Basically some functions cannot be integrated to AA
- Audio sources coming from android or from external (android not aware of them)
- Each strategy has limitations and can be criticized
- Idea is to get each model and apply to it questions/cases
- Questions like safety sources, raw streams, etc.
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