Hello everybody! In one of my Windows applications I needed the ability to control the input volume of the audio devices used there. Unfortunately, only setting the output volume was implemented so I updated the WMME backend to also support setting/getting the input volume. Please review the code and consider merging it into upstream. Note: - I was unable to test the code with audio devices that have more than one input channel (I don't have any of these). - When querying the input volume, the volume of the first channel will be returned only* - When setting the input volume, it will be applied to all channels of the device* - The patch is against pjproject 2.3 * That's not an issue if the WMME controls indicate "uniform" settings (meaning the setting of one channel is applied to all the other channels; see the code) What might need to be revisited is the return of error codes from the new function 'wave_mixer_control' because I wasn't sure on how to introduce a new ERRNO range for this. There's already PJMEDIA_AUDIODEV_ERRNO_FROM_WMME_IN() and PJMEDIA_AUDIODEV_ERRNO_FROM_WMME_OUT() and now something like PJMEDIA_AUDIODEV_ERRNO_FROM_WMME_MIXER() would be needed... I think? Best regards, Andreas Wehrmann -------------- next part -------------- A non-text attachment was scrubbed... Name: wmme_dev_input_volume.patch Type: text/x-diff Size: 12110 bytes Desc: not available URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20141113/1bce206b/attachment.patch>
