Iq tool add sampling rate and frequency GUI inputs

[vladisslav2011]

This should help to play arbitrary named iq files at correct sampling rate and align waterfall/panadapter to correct center frequency.

[vladisslav2011]

Rebased on top of current master.
Fixed 2 issues:
Playback time did not get recalculated when the sampling rate is changed via spinbox.
Both controls were left enabled during playback.

[pinkavaj]

First, thx for the MR. I have taken a look and found few thinks which I hope will help to get it into mater.

The numbers in spinboxes have different formating compared to what is already used, eg. LNB LO setting seen on the picture, which is aligned to the right and have the units set as a suffix right in the spin-box it, self.

[vladisslav2011]

Thanks.
The 'sample rate' spin box should probably be in sps, like in the 'I/O devices' dialog:

The 'frequency' spin box format was picked from the 'Receiver options':

Convert the 'Sample rate' to sps or convert both to Msps/MHz?

[pinkavaj]

Good question. My guess is the sps is usually in range xx kHz (sound card input eg 48kHz) to XX MHz (eg. 20 MHz hackRf), 20000 kHz still looks IMHO readable so I would go for ksps.

For frequency I would probably vote for MHz.

The other option to consider might be to replace double spin boxes with integer and enable group separator, then even 1 GHz would make the number still readable (eg 1,000,000,000 in EN 1 000 000 000 in my country) and it would avoid using floats, which might get tricky at some point. So Hz and sps might really work.

[pinkavaj]

Thanks for this, it came in right time because I'm just now looking for a way to play records from another SW..

[vladisslav2011]

I have not merged this into my primary dev branch. Usually I just rename/symlink files from other SW to Gqrx-accepted filename format.

[vladisslav2011]

The other option to consider might be to replace double spin boxes with integer and enable group separator

I tried this and failed. Integer spinboxes does not allow values larger, than 1000000000...

[pinkavaj]

The other option to consider might be to replace double spin boxes with integer and enable group separator

I tried this and failed. Integer spinboxes does not allow values larger, than 1000000000...

Yep, having the 'sample rate' spin box the same as in 'I/O devices' dialog makes sense to me too.

The unit still should be moved from label into the spinbox suffix, at least this is main blocker IMHO.