Publishing the source, regardless of licence conditions, would risk somebody plagiarising it for personal gain – licences are worthless unless you have the resources to enforce the licence, and in the commercial world those with the deepest pockets always win.
Are you one of the core Foobar2000 devs btw?
"Single-channel" HDCD packets have been found and discussed before:There are valid HDCD codes on both channels constantly. This is the HDCD Sampler disc after all. The quote from the second link contradicts with actual observed behavior, thought part of the reasoning logic supports the observed behavior. When a gain change is already running, keeping the gain steady or adjusting it slightly is less audible than suddenly temporarily changing the gain to zero. Adjusting gain on one channel only, however, would never make sense.
https://hydrogenaud.io/index.php/topic,79427.msg865928.html#msg865928
https://hydrogenaud.io/index.php/topic,79427.msg900371.html#msg900371
(You aren't clear about whether that particular thing has HDCD flags in both channels (but only one set to gain), or whether only one channel is flagged as being HDCD at all.)
(Is it plausible that the Pacific chip had something like that?)I don't know how advanced device it was, but 32-bit or 16-bit are the guesses I'd go with. I'd think the Microsoft implementation is close to actual hardware, or then it was simply created from highly detailed specs. But for Windows 7 or even XP era PC the 32-bit overflow would not have been a problem.
In 0.8.0 I'm having a problem with the Tuning menu when selecting an option and then using the scroll wheel. With the exception of ZERO and GAIN, the scroll wheel does not operate properly.Yikes, I just noticed the same thing here. Oops mentioned that he added different ways of accessing the tuning menu ("Add `Escape` and `RAlt/AltGr` as modifier keys on the mouse wheel to change tuning parameter") but the once you get there you can only change the VALUE of "gain", otherwise the wheel just cycles the parameter NAMES without allowing a value change.
Instead of changing the levels it instead cycles through the menu choices. So if FPS is selected and I scroll the mouse (without pressing anything), it will cycle through the Tuning menu options. Then it eventually stays on GAIN. So in other words I can only change the level of ZERO and GAIN.
I tested this on 0.7.7 and it works perfectly fine.
(...) foobar2000 v3.0 release...(...)
On the last track there was a gain change flagged only on one channel, hdcd.exe and decoders based on that ignore it, but correct decoding seems to require respecting such gain changes as long as current gain at that point isn't zero."Single-channel" HDCD packets have been found and discussed before:
Also I now know why the output of old decoders, like WMP, is 20 bits. The decoding happens in 24 bit accuracy and gain control uses 12 bit accuracy. When computing the final sample value 24 bit multiplied by 12 bit would overflow 32-bit registers and they couldn't or didn't want to handle that. So they truncated the last four bits of the 24 bit value and avoided overflows that way.(Is it plausible that the Pacific chip had something like that?)