Custom Query (2195 matches)

There are two problems here:

1. Problem with upsampling that introduces noise, and
2. Problem with resampling/upsampling, specific when it's used in the conference bridge and only when two or more sources are mixed together.

For the first problem:

The following file was upsampled with pjsua, from the original WAV file of 22050 Hz to 44100 Hz. You can hear clearly about the noise:

​http://www.pjsip.org/tmp/upsampling-noise.wav

For the second problem:

The following file was recorded by mixing two 16KHz sources and upsampled to 44.1KHz:

​http://www.pjsip.org/tmp/conference_noise.wav

When a new audio device is plugged in after Pjsip is initialised it is not seen by the sound device enumeration function.

Solution: Create a refresh audio devices function that updates the newly available devices.

Currently it will always return PJ_ERESOLVE, but it should return the appropriate native error code instead.