VoIP Audio Service API
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Code Example
Article
VoIP Audio Services API is a secure single utility interface to audio services on the S60 platform, which allows control of audio by 3rd party VoIP client applications. It provides high level access to audio device making possible to play and record audio, play DTMF and ring tones, configure supported codecs, adjust microphone gain, volume level, and switch audio routing between private and public output device.
It removes the need for use of Audio Proxy Server (APS) on S60 3rd Edition, Feature Pack 1 and Feature Pack 2 and largely extends its feature set.
Use cases
The API provides interface for clients to perform the following audio tasks:
- Initialization of downlink stream for audio playback on the local device.
- Initialization of uplink stream for audio recording on the local device.
- Playback of DTMF tones through downlink stream.
- Sending DTMF tones to the uplink stream.
- Playback of Ring Tones from a specified source or from general Profile.
- Dynamic configuration of supported encoders and decoders.
- Dynamic configuration of input and output audio devices (for example, volume or gain).
- Dynamic configuration of audio output routing.
- Verifying capability and secure allocation of resources for audio activity.
Example code
Provided with the API package.
Example project
Provided with the API package.
Known issues
KIS001634 - CRingTonePlayer instance stops with KErrUnderflow error while playing a file
Download
The latest version of the VoIP Audio Services API device binaries (sis file) can be found at File:VoIPAudioSrvc v2.03.1 SA S6031S6032S6050 BK.zip
The latest version of the VoIP Audio Services API device binaries (sis file) can be found at File:VoIPAudioServicesAPI v2.4.0.zip
VoIP Example Application Media:VoIPTestApp.zip
06 Sep
2009
This article briefly mentions the use cases for the VoIP Audio Service API (Which has evolved as an alternative for Audio Proxy Server (APS)). Looking at the use case one can easily judge on its usefulness in implementing it in the project.