Buffer-type probe at 'src' pad of GstAudioAggregator

[Sergei Hrushev]

Hi !

> GstBuffer *bufferOut = gst_buffer_copy(buffer);
>
> you are making copy of the buffer adding the signal and the modifcation never gone to downstream.
> Instead, map the buffer directly.

It seems this is a standard technique which makes the buffer writable.

And also as I wrote before this example works properly, but when I'm
adding the same probe to GstAudioMixer 'src'
it starts to experience various problems with the sound.

Best regards,
Sergei Hrushev.