420 Commits

Author	SHA1	Message	Date
Thomas Harte	a5075d9eb5	Formalised the reasoning behind the colour phase fix-up and made it an opt-in per-caller value. Only the Oric currently needs to opt in.	2017-05-16 20:31:39 -04:00
Thomas Harte	c2b5a9bb1f	Minor fix: given that phase is now a function of position, stop nudging position.	2017-05-13 21:50:48 -04:00
Thomas Harte	b14c892740	Switched to a safer RAII approach to this lock.	2017-05-10 21:29:39 -04:00
Thomas Harte	e01f3f06c8	Completed curly bracket movement.	2017-03-26 14:34:47 -04:00
Thomas Harte	e63229a5e5	Pulled vertical sync detection entirely outside the loop, and gave it greater perspective.	2017-03-06 19:15:33 -05:00
Thomas Harte	ad73379d1c	Took vertical sync detection logic entirely out of the loop.	2017-03-05 20:17:55 -05:00
Thomas Harte	4751615623	Fixed NTSC colour cycle count, and hence the 2600's reported line lengths and phase offset.	2017-03-04 17:31:39 -05:00
Thomas Harte	a3fcd15980	Loosened sync charge level requirement.	2017-03-01 22:16:56 -05:00
Thomas Harte	026b418b4a	Ensured filtered 1:1 audio resampling is applied.	2017-02-28 21:27:38 -05:00
Thomas Harte	d19f26887d	Performed a very naive shuffling of output builder sets onto the OpenGL queue. Which makes the frequency switcher work properly from it's possibly-contextless thread.	2017-02-20 10:39:31 -05:00
Thomas Harte	6cb95b4fc5	Switched to passing around std::strings rather than char *s, because they should be easier to capture.	2017-02-20 10:35:33 -05:00
Thomas Harte	d979a822ac	Introduced a deferred task list for the OpenGL thread.	2017-02-19 21:46:07 -05:00
Thomas Harte	fccdce65b9	Switched to lock guards.	2017-02-19 21:45:28 -05:00
Thomas Harte	97cdfea9e9	Resolved spurious static analyser complaint: input_size and output_size aren't supposed to have defined values if input or output is null. But whatever.	2017-02-11 13:36:09 -05:00
Thomas Harte	fcf8cafb5d	Sought to ensure that communicating a colour burst in multiple parts doesn't ruin the phase.	2017-02-06 18:27:44 -05:00
Thomas Harte	23f3ccd77a	Made a further attempt to prevent overwrites.	2017-02-05 17:47:34 -05:00
Thomas Harte	ebde955356	This needs to be a memmove as the areas may overlap.	2017-01-29 16:12:48 -05:00
Thomas Harte	7fd02e7f4c	Added an extra flag to avoid potential race condition on is_full_, being reset from the background despite a write area not having been allocated.	2017-01-29 16:11:29 -05:00
Thomas Harte	c2d7e36c8f	Ensured logic for whether composite output is in use is consistent.	2017-01-25 21:25:03 -05:00
Thomas Harte	4d6e78e641	Reinstated temporary Oric-related fix.	2017-01-24 22:16:15 -05:00
Thomas Harte	5761c8267b	[Re-]Eliminated connection between colour subcarrier frequency and monitor output mode.	2017-01-24 20:48:54 -05:00
Thomas Harte	b4159295f6	Switched to using quads for intermediate draws. The specific concern is the flexibility offered in the GL spec as to line drawing algorithms. And even if a driver implements exactly to spec then it should omit the final pixel.	2017-01-11 21:18:41 -05:00
Thomas Harte	d0a93409e6	Made an attempt to simplify in-shader phase calculation, now that output position is a direct multiple of phase.	2017-01-11 08:18:00 -05:00
Thomas Harte	4c3669f210	Reduced precision of input phase, but I'm not necessarily persuaded by it as a move. However it's clear that something is off in that whole area. But if phase is locked by output position, do I need to retain this level of complexity? Also ensured that intermediate buffers prior to the final are sampled using the nearest sampling mode, also to reduce precision errors.	2017-01-10 22:08:07 -05:00
Thomas Harte	eeb646868b	Switched off filtering, at least temporarily, to try to ensure that sampling is all where it should be.	2017-01-08 19:53:08 -05:00
Thomas Harte	3d789732a2	Switched back to full buffer clearing. Until I can figure out the source of noise.	2017-01-08 19:50:31 -05:00
Thomas Harte	d2a7d39749	Ensured the output lock isn't held while talking to the delegate.	2017-01-08 19:49:21 -05:00
Thomas Harte	9521718120	Colour phase is multiplied by 255, not 256.	2017-01-08 17:21:26 -05:00
Thomas Harte	28909e33ca	Eliminated phaseCyclesPerTick as implied.	2017-01-08 16:48:02 -05:00
Thomas Harte	79632b1d34	Instituted de-escalating phase-related extensions, definitively to kill rounding error edges.	2017-01-08 16:24:22 -05:00
Thomas Harte	7ad64ff16b	Made further efforts to support throughput via memory barrier.	2017-01-08 14:47:16 -05:00
Thomas Harte	be48c950b4	Started taking steps towards using a texture barrier where possible to reduce all of my framebuffer binds. Some output appears, but it's not correct.	2017-01-08 11:13:20 -05:00
Thomas Harte	0487b8c178	Definitively eliminated the additional y filtering step; if I'm going to work to ensure always four samples per colour cycle, I can put the channel separation coefficients directly into their shaders, cutting down on samples.	2017-01-07 16:02:33 -05:00
Thomas Harte	5740015f56	Temporarily disabled composite processing to show the pure stream. Fixed both automatic calculations of phase — per line and, at input, per pixel.	2017-01-07 12:38:00 -05:00
Thomas Harte	c84004bfa3	Fixed: colour_cycle_numerator_ doesn't need to be multiplied by the time multiplier because it'll get that for free from the calculation of next_run_length.	2017-01-06 21:36:19 -05:00
Thomas Harte	c746a3711f	Temporarily disabled my attempt to be clever with bilinear filtering when applying a lowpass filter. Will need to investigate.	2017-01-04 08:06:18 -05:00
Thomas Harte	aa7774a9a6	Experimental: up the chroma accuracy, just let the luma go straight through. Subject to figuring out how I'm still losing so much precision.	2017-01-03 22:41:34 -05:00
Thomas Harte	a836120945	Restored proper colour separation, but somewhere a massive hit in horizontal resolution is happening — much greater than one would expect from the sample size picked. So investigation to come.	2017-01-03 22:32:07 -05:00
Thomas Harte	7d60df9075	Added the option for both intermediate and output shaders to use only a portion of the input/output texture; made an attempt to pick an appropriate proportion in order to align signal sampling with the colour subcarrier.	2017-01-03 22:16:52 -05:00
Thomas Harte	f2b8b26bc4	Started throwing some comments into my shaders.	2017-01-03 21:16:38 -05:00
Thomas Harte	34d213dec4	Decreased Y resolution, again also hopefully temporarily.	2016-12-10 15:35:38 -05:00
Thomas Harte	81a102d951	Upped intermediate buffer size, at least temporarily, while I look for the source of the interference patterns I'm seeing.	2016-12-10 15:20:10 -05:00
Thomas Harte	0e71802b92	Reduced Oric video to single nibble constants. Removed attempt at asynchronous flush as no longer required.	2016-12-10 14:17:46 -05:00
Thomas Harte	a549fd1ecc	Introduced the ability simply to piggy-back off the CRT's natural phase for the colour burst, thereby eliminating a couple of redundant independent attempts in the Oric and Electron.	2016-12-10 13:42:34 -05:00
Thomas Harte	5216dda675	Added some brief extra exposition to the texture builder, cut all internal tex_x/y and source_divider stuff from the CRT.	2016-12-06 19:08:55 -05:00
Thomas Harte	33d52bb573	Ensured no over-moving.	2016-12-06 19:02:18 -05:00
Thomas Harte	4ff33254e1	Sought to shift locking back up to the CRT. And to be a bit more RAII-ish.	2016-12-06 18:48:30 -05:00
Thomas Harte	60f9ddfde8	Fixed start test and added incrementation of start locations.	2016-12-06 08:08:57 -05:00
Thomas Harte	f388ba11cc	Missed an initialisation. Fixed!	2016-12-06 07:26:23 -05:00
Thomas Harte	0fee8096c1	Made an attempt to shuffle the texture builder to a similar flush/submit pattern as the input builder. Don't care about thread safety yet, as it's obvious I'm going to need to move that back up to the CRT.	2016-12-06 07:24:07 -05:00