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davidpeek
Intermediate
Joined: December 18 2009
Location: United States
Posts: 10
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| Posted: February 18 2010 at 9:05am | IP Logged
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Hi Randal,
I have the need to transmit a WAV file in a session and this works fine. However, while this WAV file is playing I need to mute the microphone. I don't see how to do this aside from setting the trasmit volume but this will mute the WAV file. Am I missing something or do I have to handle this outside the LME?
Thanks,
=Dave
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support
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Joined: January 26 2005
Location: United States
Posts: 1666
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| Posted: February 18 2010 at 10:00am | IP Logged
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Hello Dave,
Thanks for your post.
I also received your other email yesterday. It sounds like you are making good progress on the VOIP demo.
The long story:
We do have this capability to mute locally recorded audio so the recorded audio does not get added to phone line transmitted media. The native API functionality for local recorded audio control is callback based. If the application registers a callback procedure, the media engine will call it for each sample block of local audio that gets recorded. The application can instruct the media engine to mute the locally recorded audio by specifying a specific return value from the app’s callback proc.
The short story:
Unfortunately this capability is not currently exposed in the managed code API. :(
I recommend that we add a new native and managed code API would control this behavior. In other words, we can add the MuteLocalRecordedAudio() API procedure that will allow the app to mute or un-mute the locally recorded audio. This approach would fit with the current callback mechanism in addition to being very simple to implement and use.
I can deliver this to you today if you give me the OK.
Randal
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support
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Joined: January 26 2005
Location: United States
Posts: 1666
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| Posted: February 23 2010 at 12:53pm | IP Logged
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Additional notes for anyone who reads this post:
As Dave and I worked together on a recent project, we ended up adding two new media engine APIs that simplify certain “audio mute” operations:
MuteRecordAudio()
VOIP applications can call this API procedure to mute all locally recorded audio (for example from microphone input) so that it does not get mixed with other possible sources of phone line transmitted audio.
MutePlaybackAudio()
VOIP applications can call this API procedure to mute all audio that is normally played back on local multimedia hardware.
Randal
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LanScape Support Forum -> LanScape VOIP Media Engine™ - Technical Support
Topic: Mute Microphone Support
