328 Commits

Author	SHA1	Message	Date
Thomas Harte	4258401384	Implemented flush, added a call to it from the filter speaker's destructor, to ensure no race conditions on accessing the various bits of instance state there and below.	2016-10-19 21:15:04 -04:00
Thomas Harte	c628b7c5c5	This is the real PAL frequency, I think.	2016-10-17 08:05:02 -04:00
Thomas Harte	1f857c619b	Fixed timing issues. Static box of frame achieved!	2016-10-12 21:42:36 -04:00
Thomas Harte	00e3ad9b04	Added a bit more ceiling for lowpass filtering on constrained machines.	2016-10-10 07:51:01 -04:00
Thomas Harte	e53455a936	Not having read the C++ synchronisation primitives before, this async task queue is probably incorrect. But nevertheless, let's have a quick go at employing it — in a hideously thread unsafe fashion — for audio generation. What can possibly go wrong?	2016-10-07 16:56:34 -04:00
Thomas Harte	dab3580111	Experimental: can I afford a lower sampling rate if there's a low-pass filter in effect?	2016-08-22 22:18:05 -04:00
Thomas Harte	1541273785	Moved responsibility for throwing in a low-pass filter up to the Vic, appropriately.	2016-08-21 18:13:31 -04:00
Thomas Harte	c783090980	It turns out that the Vic has a 1.6Khz low-pass filter. So added that.	2016-08-21 12:13:41 -04:00
Thomas Harte	fef316932f	Moved opening bracket appropriately.	2016-07-04 21:14:28 -04:00
Thomas Harte	8db44eed3e	Added a default implementation of Speaker::skip_samples.	2016-07-04 20:48:27 -04:00
Thomas Harte	2bc87ee095	Merge branch 'master' of github.com:TomHarte/CLK	2016-07-01 16:28:18 -04:00
Thomas Harte	eefd0c17b6	Actually, I guess that to fulfil the contract I can't silently decide not to draw if I'm being told I definitely need to draw.	2016-07-01 16:27:45 -04:00
Thomas Harte	ed8f4d0476	Added some minor additional bits of documentation.	2016-06-30 08:46:29 -04:00
Thomas Harte	4ac619f569	glClientWaitSync appears to be a busy wait, at least on my machine. But why wait indefinitely anyway?	2016-06-29 21:32:47 -04:00
Thomas Harte	ff53accca0	Demonstrated that issue is coloured borders, made a guess as to buffer exhaustion, upped limits as a temporary fix.	2016-06-29 21:16:34 -04:00
Thomas Harte	2bd71e7e9b	.reset is the more normal way to reassign a unique_ptr.	2016-06-23 20:52:44 -04:00
Thomas Harte	c18cc4c8f5	It appears the Vic's output is sine-ish, after all. Also adjusted centre of display, simultaneously adding some validation on that.	2016-06-14 07:29:35 -04:00
Thomas Harte	fcf4b14344	Extended to allow floating-point sampling rates. Which makes sense.	2016-06-13 19:30:41 -04:00
Thomas Harte	2992183aae	Switched to a lookup table for phase, temporarily in YUV colour space, probably. Working on it.	2016-06-12 14:39:17 -04:00
Thomas Harte	68a8851c52	Increased parallelism, allowing a simplification in the GL view.	2016-06-02 22:29:09 -04:00
Thomas Harte	1e0fcbbee8	Made a very basic stab at a couple of the tone generators, added straight-through path for the speaker when input rate exactly equals output rate.	2016-06-01 19:53:16 -04:00
Thomas Harte	5c4f35e13f	Finally started on generalising the C++ stuff so as to be able to be able to get a working audio binding on the OS-specific side without further repetition by factoring an appropriate protocol out from the Electron and sketching out the correct speaker class for the Atari. Added a method to ask it what a good output frequency would be.	2016-05-31 21:23:44 -04:00
Thomas Harte	4ad074fc78	Introduced a four-cycle delay between playfield fetch and display, curing Yar's Revenge. Also disabled barrel roll scanling colouring again. I really need to make my mind up on that.	2016-05-16 19:55:56 -04:00
Thomas Harte	9d92ad659f	Established the basic timing loop, albeit without clocking delays yet.	2016-05-16 08:01:29 -04:00
Thomas Harte	00a2b42080	Made thread-safe.	2016-05-15 15:19:52 -04:00
Thomas Harte	091516e3cb	The semantics might need better exposition but: fixed UniformXfv calls plus matrix calls, documented new semantics on all setters.	2016-05-15 14:59:59 -04:00
Thomas Harte	328fabcd10	Ensured values aren't dangling pointers.	2016-05-14 18:15:10 -04:00
Thomas Harte	492dc7ccbf	Made an attempt to queue uniform changes until the next call to bind. That's to allow usage from other threads.	2016-05-14 18:06:55 -04:00
Thomas Harte	30f335fa35	Switched pervasively to using the named slot uniform setters on Shader.	2016-05-13 22:08:32 -04:00
Thomas Harte	8d52765f40	Realised why new shaders weren't taking. Very negligibly decreased Atari drawing cost.	2016-05-12 22:22:24 -04:00
Thomas Harte	6d65bc9b3a	Permitted a wider error window on vertical sync, tidied things up a little and started trying to move towards full implementation of the OpenGL contract.	2016-05-11 22:11:01 -04:00
Thomas Harte	4b3c4082d2	These functions appear correctly to model the NTSC and PAL palettes; the CRT's attempt to switch function doesn't work properly yet though.	2016-05-11 21:07:18 -04:00
Thomas Harte	a8ce021136	Fixed comment.	2016-05-10 19:59:03 -04:00
Thomas Harte	0d2d6a452d	Fixed some dangling buffer management issues.	2016-05-10 19:55:34 -04:00
Thomas Harte	b6d2c8cb63	Switched to instaced drawing for source[/intermediate] runs too, reducing that data transfer footprint by 50%.	2016-05-10 19:50:12 -04:00
Thomas Harte	7369139f7e	Realised that phase time can fit inside a single byte, since it's always (well) within the first quarter of the line — and if it somehow weren't (?) then taking it modulo the frequency would do.	2016-05-10 19:14:57 -04:00
Thomas Harte	47ae402f7e	Introduced a shorthand for setting up array attributes.	2016-05-10 19:11:48 -04:00
Thomas Harte	257420b0f7	Fixed potential output error if buffer top were hit; clarified buffer size constants.	2016-05-10 19:04:03 -04:00
Thomas Harte	309313c470	Update CRTConstants.hpp ... Lack of data duplication means this storage can be smaller.	2016-05-10 10:49:48 -04:00
Thomas Harte	1d0bcb416d	Dropped the size per output run back down to 8 bytes.	2016-05-10 07:47:47 -04:00
Thomas Harte	b0f0315f12	Fixed: this now implements 12-byte instancing for output runs.	2016-05-10 07:30:12 -04:00
Thomas Harte	86dab3a5d6	Quickest first attempt to switch to instancing for the output array. Texture coordinates seem to be off.	2016-05-10 07:23:47 -04:00
Thomas Harte	daec21d3d8	Found and fixed off-by-one error. Display should now be completely fixed.	2016-05-09 21:14:59 -04:00
Thomas Harte	59d766b325	Rationalised buffer sizes.	2016-05-09 19:17:03 -04:00
Thomas Harte	7e2bd78891	With an eye towards instancing, moved away from circular buffers.	2016-05-09 19:14:30 -04:00
Thomas Harte	ad734f341f	Attempted fully to perfect memove, albeit that it's not affecting either current machine.	2016-05-09 07:44:05 -04:00
Thomas Harte	8eb058064c	Fixed: ensured that the attempt to plot a misplaced write occurs correctly.	2016-05-09 07:42:26 -04:00
Thomas Harte	e6a7161e87	Made some minor corrections on the copyback of misplaced write data.	2016-05-09 07:39:57 -04:00
Thomas Harte	45af963b9a	Moved more of the circular logic inside getCircularRanges in order to eliminate one more potential source of error.	2016-05-09 07:34:37 -04:00
Thomas Harte	cec9ad0dc6	Switched to a more rational interface, ensured output_level will work when eventually needed, and that neither it nor output_data attempts a recursive lock.	2016-05-09 07:02:12 -04:00