TODO

libsigrok

Clean up device-specific globals in hardware drivers, to properly permit multiple devices per driver: fx2lafw, zeroplus-logic-cube, others(?)
Asix SIGMA driver: support multiple devices properly (currently only one is supported).
Chronovu LA8/LA16 driver: support multiple devices properly (currently only one is supported).

Add Scanalogic output module support (Uwe Hermann).
Add output for latex package tikz-timing.
Add output for browser waveform viewer/editor written in javascript/JSON called WaveDrom.
~~Have a look at DrawTiming http://drawtiming.sourceforge.net (ImageMagick frontend commandline tool).~~

Check all public API calls to see whether they need an sr_context parameter.
struct sr_channel.index: Drivers relying on the GSList order should be changed back to use the index field.
Use glib functions for file handling, not manual fopen/fclose etc., for portability reasons.
Run the code receiving the samples as quickly as possible, run output format code and other non-timing-critical stuff (protocol decoders) in an extra thread. The problem is nicely visible with FX2-based logic analyzers, the longer an output format takes to produce its output, the better your chances to get "oops, I just lost samples" errors.
sr_errno:
- Most functions should return SR_OK or SR_ERR_* (same for SRD_OK etc).
- Most backend functions return status as an integer, which is SR_OK if all went well, or SR_ERR_* if an error occurred.
- However, there is no way to pass any information back as to what went wrong — and this is important for user-friendliness.
- Perhaps an error code is not enough; maybe something like sigrok_errno(errorcode, "unsupported device") is better.
Support specifying the firmware directory at runtime.

Annotations need an additional 'type' field, so that PDs/GUIs can differentiate between different output "things".
- Types are not yet defined, but could be things like DEFAULT, ERR, WARN, DBG, and others.
- Best handled with a keyword arg to put(), which defaults to srd.ANN_DEFAULT.
Test/implement support for multiple outputs of one PD, and stacking different additional PDs on those outputs.
Test/implement multiple inputs support.
Add srd_context parameter, and check all public API calls to see whether they need it (?)

Python exception handling in libsrd: add full traceback support with srd_dbg().
Make specification of triggering capabilities more detailed, so that frontends/GUIs can auto-generate GUI forms out of that metadata.
Add a --run option, which just starts sampling with the supplied or default samplerate. Contrary to --time or --samples you don't need to explicitly specify a duration or number of samples here, that's automatically determined by the available memory of the logic analyzer and the selected samplerate. Devices that can stream continuously will do so, others will just fill a buffer and then stop.
- TODO: Similar to --continuous? Merge both?

Analog sampling: 1-channel, 2-channel, voltage meter
Trigger pin
Clock input
Clock output
Frequency/pulse counter
Signal generator
Fix power consumption during enumeration.
- Non-LP FX2's consume more than 100mA during enumeration. This is outside of the USB specification
- Official workaround is to enumerate first as full-speed, then as high-speed. This is overkill for sigrok.
- Investigate putting the CPU to sleep (except for processing interrupts) until enumerated.

Deduplicate property setting functionality between SamplingBar and DeviceOptions - make SamplingBar a properties container
Analog support
- Add signal v-scale control (Volts/div).
- Add interpolation (cosine? sinc? some kind of interpolation filter?)
Add support for other open/import file formats
Add signal overview
Paint speed profiling information.
Code documentation
Transition coding
Store more config options with QSettings