mirror/btstack
1
0
Fork 0
mirror of https://github.com/bluekitchen/btstack.git synced 2025-02-06 03:40:16 +00:00
Code Issues Packages Projects Releases Wiki Activity

doc: short A2DP/AVRCP overview

Browse Source
This commit is contained in:
Milanka Ringwald 2021-12-17 17:11:22 +01:00
parent 2d21ec1992
commit ba8d4e9bd2
1 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
doc/manual/docs-template/profiles.md
View File

@ -3,6 +3,18 @@
In the following, we explain how the various Bluetooth profiles are used
in BTstack.
## A2DP - Advanced Audio Distribution
The A2DP profile defines how to stream audio over a Bluetooth connection from one device, such as a mobile phone, to another device such as a headset. A device that acts as source of audio stream implements the A2DP Source role. Similarly, a device that receives an audio stream implements the A2DP Sink role. As such, the A2DP service allows uni-directional transfer of an audio stream, from single channel mono, up to two channel stereo. Our implementation includes mandatory support for the low-complexity SBC codec. Signaling for optional codes (FDK AAC, LDAC, APTX) is supported as well, by you need to provide your own codec library.
## AVRCP - Audio/Video Remote Control Profile
The AVRCP profile defines how audio playback on a remote device (e.g. a music app on a smartphone) can be controlled as well as how to state changes such as volume, information on currently played media, battery, etc. can be received from a remote device (e.g. a speaker). Usually, each device implements two roles:
- The Controller role allows to query information on currently played media, such are title, artist and album, as well as to control the playback, i.e. to play, stop, repeat, etc.
- The Target role responds to commands, e.g. playback control, and queries, e.g. playback status, media info, from the Controller currently played media.
## GAP - Generic Access Profile: Classic