summaryrefslogtreecommitdiff
path: root/src/til.c
blob: 6b4fd992817db45d7a6c0acbc7c030046a5d86f3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <inttypes.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>

#include "til.h"
#include "til_fb.h"
#include "til_module_context.h"
#include "til_settings.h"
#include "til_stream.h"
#include "til_threads.h"
#include "til_util.h"

/* Copyright (C) 2016 Vito Caputo <vcaputo@pengaru.com> */

#define TIL_DEFAULT_ROOT_MODULE		"rtv"
#define TIL_DEFAULT_NESTED_MODULE	"compose"

static til_threads_t	*til_threads;
static struct timeval	til_start_tv;

extern til_module_t	asc_module;
extern til_module_t	blinds_module;
extern til_module_t	checkers_module;
extern til_module_t	compose_module;
extern til_module_t	drizzle_module;
extern til_module_t	flow_module;
extern til_module_t	flui2d_module;
extern til_module_t	julia_module;
extern til_module_t	meta2d_module;
extern til_module_t	mixer_module;
extern til_module_t	moire_module;
extern til_module_t	montage_module;
extern til_module_t	pixbounce_module;
extern til_module_t	plasma_module;
extern til_module_t	plato_module;
extern til_module_t	ray_module;
extern til_module_t	rkt_module;
extern til_module_t	roto_module;
extern til_module_t	rtv_module;
extern til_module_t	shapes_module;
extern til_module_t	signals_module;
extern til_module_t	snow_module;
extern til_module_t	sparkler_module;
extern til_module_t	spiro_module;
extern til_module_t	stars_module;
extern til_module_t	strobe_module;
extern til_module_t	submit_module;
extern til_module_t	swab_module;
extern til_module_t	swarm_module;
extern til_module_t	voronoi_module;

/* built-ins (til_builtins.c) */
extern til_module_t	_blank_module;
extern til_module_t	_none_module;
extern til_module_t	_noop_module;
extern til_module_t	_ref_module;

static const til_module_t	*modules[] = {
	&asc_module,
	&blinds_module,
	&checkers_module,
	&compose_module,
	&drizzle_module,
	&flow_module,
	&flui2d_module,
	&julia_module,
	&meta2d_module,
	&mixer_module,
	&moire_module,
	&montage_module,
	&pixbounce_module,
	&plasma_module,
	&plato_module,
	&ray_module,
	&rkt_module,
	&roto_module,
	&rtv_module,
	&shapes_module,
	&signals_module,
	&snow_module,
	&sparkler_module,
	&spiro_module,
	&stars_module,
	&strobe_module,
	&submit_module,
	&swab_module,
	&swarm_module,
	&voronoi_module,

	/* built-ins at the end */
	&_blank_module,
	&_none_module,
	&_noop_module,
	&_ref_module,
};


/* initialize rototiller (create rendering threads) */
int til_init(void)
{
	if (!(til_threads = til_threads_create()))
		return -errno;

	gettimeofday(&til_start_tv, NULL);

	return 0;
}


/* wait for all threads to be idle */
void til_quiesce(void)
{
	til_threads_wait_idle(til_threads);
}


void til_shutdown(void)
{
	til_threads_destroy(til_threads);
}


#ifdef __WIN32__
/* taken from glibc <sys/time.h> just to make windows happy*/
# define timersub(a, b, result)                                               \
  do {                                                                        \
    (result)->tv_sec = (a)->tv_sec - (b)->tv_sec;                             \
    (result)->tv_usec = (a)->tv_usec - (b)->tv_usec;                          \
    if ((result)->tv_usec < 0) {                                              \
      --(result)->tv_sec;                                                     \
      (result)->tv_usec += 1000000;                                           \
    }                                                                         \
  } while (0)
#endif

/* returns number of "ticks" since til_init(), which are currently milliseconds */
unsigned til_ticks_now(void)
{
	struct timeval	now, diff;

	/* for profiling purposes in particular, it'd be nice to bump up to microseconds...
	 * but then it'll prolly need uint64_t
	 */

	gettimeofday(&now, NULL);
	timersub(&now, &til_start_tv, &diff);

	return diff.tv_sec * 1000 + diff.tv_usec / 1000;
}


const til_module_t * til_lookup_module(const char *name)
{
	assert(name);

	for (size_t i = 0; i < nelems(modules); i++) {
		if (!strcasecmp(name, modules[i]->name))
			return modules[i];
	}

	return NULL;
}


void til_get_modules(const til_module_t ***res_modules, size_t *res_n_modules)
{
	assert(res_modules);
	assert(res_n_modules);

	*res_modules = modules;
	*res_n_modules = nelems(modules);
}


char * til_get_module_names(unsigned flags_excluded, const char **exclusions)
{
	const til_module_t	**modules;
	size_t			n_modules;
	size_t			bufsz;
	char			*buf;

	til_get_modules(&modules, &n_modules);

	for (buf = NULL, bufsz = sizeof('\0');;) {
		for (size_t i = 0, j = 0, p = 0; i < n_modules; i++) {
			const til_module_t	*mod = modules[i];
			const char		**exclusion = exclusions;

			if ((mod->flags & flags_excluded))
				continue;

			while (*exclusion) {
				if (!strcmp(*exclusion, mod->name))
					break;

				exclusion++;
			}

			if (*exclusion)
				continue;

			if (!buf)
				bufsz += snprintf(NULL, 0, "%s%s", j ? "," : "", mod->name);
			else
				p += snprintf(&buf[p], bufsz - p, "%s%s", j ? "," : "", mod->name);

			j++;
		}

		if (buf)
			return buf;

		buf = calloc(1, bufsz);
		if (!buf)
			return NULL;
	}
}


static void module_render_fragment(til_module_context_t *context, til_stream_t *stream, til_threads_t *threads, unsigned n_cpus, unsigned ticks, til_fb_fragment_t **fragment_ptr)
{
	const til_module_t	*module;
	int			touched = 0;

	assert(context);
	assert(context->module);
	assert(threads);
	assert(fragment_ptr && *fragment_ptr);
	assert(n_cpus);

	module = context->module;

render_again:
	if (module->prepare_frame) {
		til_frame_plan_t	frame_plan = {};

		module->prepare_frame(context, stream, ticks, fragment_ptr, &frame_plan);

		/* XXX: any module which provides prepare_frame() must return a frame_plan.fragmenter,
		 * and provide render_fragment()
		 */
		assert(frame_plan.fragmenter);
		assert(module->render_fragment);

		if (n_cpus > 1) {
			til_threads_frame_submit(threads, fragment_ptr, &frame_plan, module->render_fragment, context, stream, ticks);
			til_threads_wait_idle(threads);
		} else {
			unsigned		fragnum = 0;
			til_fb_fragment_t	frag, texture, *frag_ptr = &frag;

			if ((*fragment_ptr)->texture)
				frag.texture = &texture; /* fragmenter needs the space */

			while (frame_plan.fragmenter(context, *fragment_ptr, fragnum++, &frag))
				module->render_fragment(context, stream, ticks, 0, &frag_ptr);
		}
		touched++;
	} else if (module->render_fragment) {
		module->render_fragment(context, stream, ticks, 0, fragment_ptr);
		touched++;
	}

	if (module->finish_frame) {
		if (module->finish_frame(context, stream, ticks, fragment_ptr) > 0)
			goto render_again;
		touched++;
	}

	(*fragment_ptr)->cleared = !!touched;
}


static void _til_module_render(til_module_context_t *context, til_stream_t *stream, unsigned n_cpus, unsigned ticks, til_fb_fragment_t **fragment_ptr)
{
	unsigned	start = til_ticks_now();

	module_render_fragment(context, stream, til_threads, n_cpus, ticks, fragment_ptr);

	context->last_render_duration = til_ticks_now() - start;
	if (context->last_render_duration > context->max_render_duration)
		context->max_render_duration = context->last_render_duration;
	context->renders_count++;
	context->last_ticks = ticks;
}


/* This is a public interface to the threaded module rendering intended for use by
 * modules that wish to get the output of other modules for their own use.
 */
void til_module_render(til_module_context_t *context, til_stream_t *stream, unsigned ticks, til_fb_fragment_t **fragment_ptr)
{
	return _til_module_render(context, stream, context->n_cpus, ticks, fragment_ptr);
}


/* Identical to til_module_render() except with a parameterized upper bound for context->c_cpus,
 * this is primarily intended for modules performing nested rendering
 */
void til_module_render_limited(til_module_context_t *context, til_stream_t *stream, unsigned ticks, unsigned max_cpus, til_fb_fragment_t **fragment_ptr)
{
	return _til_module_render(context, stream, MIN(context->n_cpus, max_cpus), ticks, fragment_ptr);
}


/* if n_cpus == 0, it will be automatically set to n_threads.
 * to explicitly set n_cpus, just pass the value.  This is primarily intended for
 * the purpose of explicitly constraining rendering parallelization to less than n_threads,
 * if n_cpus is specified > n_threads it won't increase n_threads...
 *
 * if stream is non-NULL, the created contexts will be registered on-stream w/handle @setup->path.
 * any existing contexts @setup->path, will be replaced by the new one.
 */
int til_module_create_contexts(const til_module_t *module, til_stream_t *stream, unsigned seed, unsigned ticks, unsigned n_cpus, til_setup_t *setup, size_t n_contexts, til_module_context_t **res_contexts)
{

	assert(module);
	assert(setup); /* we *always* want a setup, even if the module has no setup() method - for the path */
	assert(module == setup->creator); /* these should never differ */
	assert(n_contexts > 0);
	assert(res_contexts);

	if (!n_cpus)
		n_cpus = til_threads_num_threads(til_threads);

	for (size_t i = 0; i < n_contexts; i++) {
		til_module_context_t	*context;

		if (!module->create_context)
			context  = til_module_context_new(module, sizeof(til_module_context_t), stream, seed, ticks, n_cpus, setup);
		else
			context = module->create_context(module, stream, seed, ticks, n_cpus, setup);

		if (!context) {
			for (size_t j = 0; j < i; j++)
				res_contexts[j] = til_module_context_free(res_contexts[j]);

			return -ENOMEM;
		}

		res_contexts[i] = context;
	}

	if (stream) {
		int	r;

		r = til_stream_register_module_contexts(stream, n_contexts, res_contexts);
		if (r < 0) {
			for (size_t i = 0; i < n_contexts; i++)
				res_contexts[i] = til_module_context_free(res_contexts[i]);

			return r;
		}
	}

	return 0;
}


/* convenience single-context wrapper around til_module_create_contexts(), as most callers need just one. */
int til_module_create_context(const til_module_t *module, til_stream_t *stream, unsigned seed, unsigned ticks, unsigned n_cpus, til_setup_t *setup, til_module_context_t **res_context)
{
	return til_module_create_contexts(module, stream, seed, ticks, n_cpus, setup, 1, res_context);
}


int til_module_setup_full(const til_settings_t *settings, til_setting_t **res_setting, const til_setting_desc_t **res_desc, til_setup_t **res_setup, const char *name, const char *preferred, unsigned flags_excluded, const char **exclusions)
{
	const char		*module_name;
	til_setting_t		*setting;
	const til_module_t	*module;

	assert(settings);
	assert(name);
	assert(preferred);

	module_name = til_settings_get_value_by_idx(settings, 0, &setting);
	if (!module_name || !setting->desc) {
		const char	*values[nelems(modules) + 1] = {};
		const char	*annotations[nelems(modules) + 1] = {};
		int		r;

		for (unsigned i = 0, j = 0; i < nelems(modules); i++) {
			if (modules[i]->flags & flags_excluded)
				continue;

			if (exclusions) {
				const char	**excl = exclusions;

				for (; *excl; excl++) {
					if (!strcasecmp(*excl, modules[i]->name))
						break;
				}

				if (*excl)
					continue;
			}

			values[j] = modules[i]->name;
			annotations[j] = modules[i]->description;
			j++;
		}

		r = til_setting_desc_new(	settings,
						&(til_setting_spec_t){
							.name = name,
							.key = NULL,
							.regex = "[a-zA-Z0-9]+",
							.preferred = preferred,
							.values = values,
							.annotations = annotations,
							.as_label = 1
						}, res_desc);
		if (r < 0)
			return r;

		*res_setting = module_name ? setting : NULL;

		return 1;
	}

	module = til_lookup_module(module_name);
	if (!module)
		return -EINVAL;

	if (module->setup)
		return module->setup(settings, res_setting, res_desc, res_setup);

	if (res_setup)
		return til_module_settings_finalize(module, settings, res_setup);

	return 0;
}


/* select module if not yet selected, then setup the module. */
int til_module_setup(const til_settings_t *settings, til_setting_t **res_setting, const til_setting_desc_t **res_desc, til_setup_t **res_setup)
{
	const til_settings_t	*parent;

	parent = til_settings_get_parent(settings);

	return til_module_setup_full(settings,
				     res_setting,
				     res_desc,
				     res_setup,
				     "Renderer module",
				     parent ? TIL_DEFAULT_NESTED_MODULE : TIL_DEFAULT_ROOT_MODULE,
				     (TIL_MODULE_EXPERIMENTAL | (parent ? TIL_MODULE_HERMETIC : 0)),
				     NULL);
}


/* originally taken from rtv, this randomizes a module's setup @res_setup, args @res_arg
 * returns 0 on on setup successful with results stored @res_*, -errno on error.
 */
int til_module_settings_randomize(const til_module_t *module, til_settings_t *settings, unsigned seed, til_setup_t **res_setup, char **res_arg)
{
	til_setting_t			*setting;
	const char			*name;
	const til_setting_desc_t	*desc;
	int				r = 0;

	assert(module);
	assert(settings);

	/* This is kind of a silly formality for randomize, since the callers already
	 * specify the module.  But we really need to ensure the first entry is described,
	 * so the .as_label can be found in situations like rkt_scener's "add randomized scene".
	 *
	 * FIXME TODO: what should probably be happening using til_module_setup() as the
	 * top-level setup_func, to get the module setting described.  This is just a quick
	 * hack to make things usable.
	 */
	name = til_settings_get_value_by_idx(settings, 0, &setting);
	if (!name)
		return -EINVAL;

	if (!setting->desc) {
		r = til_setting_desc_new(	settings,
						&(til_setting_spec_t){
							.name = "Renderer module",
							.preferred = til_setting_get_raw_value(setting),
							.as_label = 1
						}, &setting->desc);
		if (r < 0)
			return r;
	}

	if (!module->setup) {
		til_setup_t	*setup;

		setup = til_setup_new(settings, sizeof(*setup), NULL, module);
		if (!setup)
			r = -ENOMEM;
		else
			*res_setup = setup;
	} else {
		for (setting = NULL; module->setup(settings, &setting, &desc, res_setup) > 0; setting = NULL) {
			assert(desc);

			if (!setting) {
				if (desc->spec.random) {
					char	*value;

					value = desc->spec.random(rand_r(&seed));
					setting = til_settings_add_value(desc->container, desc->spec.key, value);
					free(value);
				} else if (desc->spec.values) {
					int	n;

					for (n = 0; desc->spec.values[n]; n++);

					n = rand_r(&seed) % n;

					setting = til_settings_add_value(desc->container, desc->spec.key, desc->spec.values[n]);
				} else {
					setting = til_settings_add_value(desc->container, desc->spec.key, desc->spec.preferred);
				}
			}

			assert(setting);

			if (setting->desc)
				continue;

			/*
			 * TODO This probably also needs to move into a til_settings helper,
			 * copy-n-pasta alert, taken from setup.c
			 */
			if (desc->spec.override) {
				const char	*o;

				o = desc->spec.override(setting->value);
				if (!o)
					return -ENOMEM;

				if (o != setting->value) {
					r = til_setting_set_raw_value(setting, o);
					free((void *)o);
					if (r < 0)
						return -ENOMEM;
				}
			}

			if (desc->spec.as_nested_settings && !setting->value_as_nested_settings) {
				char	*label = NULL;

				if (!desc->spec.key) {
					/* generate a positional label for bare-value specs */
					r = til_settings_label_setting(desc->container, setting, &label);
					if (r < 0)
						break;
				}

				setting->value_as_nested_settings = til_settings_new(NULL, desc->container, desc->spec.key ? : label, til_setting_get_raw_value(setting));
				free(label);

				if (!setting->value_as_nested_settings) {
					r = -ENOMEM;
					break;
				}
			}

			setting->desc = desc;
		}
	}

	if (res_arg && r == 0) {
		char	*arg;

		arg = til_settings_as_arg(settings);
		if (!arg)
			r = -ENOMEM;
		else
			*res_arg = arg;
	}

	return r;
}


/* This turns the incoming module+setings into a "baked" til_setup_t,
 * if module->setup() isn't provided, a minimal til_setup_t is still produced.
 */
int til_module_settings_finalize(const til_module_t *module, const til_settings_t *module_settings, til_setup_t **res_setup)
{
	til_setting_t			*setting;
	const til_setting_desc_t	*desc;
	int				r;

	assert(module);
	assert(module_settings);
	assert(res_setup);

	if (!module->setup) {
		til_setup_t	*setup;

		setup = til_setup_new(module_settings, sizeof(*setup), NULL, module);
		if (!setup)
			return -ENOMEM;

		*res_setup = setup;

		return 0;
	}

	/* TODO: note passing &setting and &desc when finalizing is really only necessary
	 * because of how nested settings get found via &setting, and modules that do this
	 * currently tend to access (*res_setting)->value_as_nested_settings and that needs
	 * to occur even when just finalizing.  A future change may rework how modules do
	 * this, but let's just pass the res_setting and res_desc pointers to keep things
	 * happy for now.  Long-term it should really be possible to pass NULL for those,
	 * at least when you're just finalizing.
	 */
	r = module->setup(module_settings, &setting, &desc, res_setup);
	if (r < 0)
		return r;
	if (r > 0)	/* FIXME: this should probably free desc */
		return -EINVAL; /* module_settings is incomplete, but we're not performing setup here. */

	return r;
}


/* generic noop fragmenter that does no subfragmenting at all, producing a whole fragment per-cpu */
int til_fragmenter_noop_per_cpu(til_module_context_t *context, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
{
	return til_fb_fragment_noop_single(fragment, context->n_cpus, number, res_fragment);
}


/* generic fragmenter using a horizontal slice per cpu according to context->n_cpus */
int til_fragmenter_slice_per_cpu(til_module_context_t *context, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
{
	return til_fb_fragment_slice_single(fragment, context->n_cpus, number, res_fragment);
}


/* generic fragmenter using a horizontal slice per cpu according to context->n_cpus * 16 */
int til_fragmenter_slice_per_cpu_x16(til_module_context_t *context, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
{
	/* The *16 is to combat leaving CPUs idle waiting for others to finish their work.
	 *
	 * Even though there's some overhead in scheduling smaller work units,
	 * this still tends to result in better aggregate CPU utilization, up
	 * to a point.  The cost of rendering slices is often inconsistent,
	 * and there's always a delay from one thread to another getting
	 * started on their work, as well as scheduling variance.
	 *
	 * So it's beneficial to enable early finishers to pick
	 * up slack of the laggards via slightly more granular
	 * work units.
	 */
	return til_fb_fragment_slice_single(fragment, context->n_cpus * 16, number, res_fragment);
}


/* generic fragmenter using 64x64 tiles */
int til_fragmenter_tile64(til_module_context_t *context, const til_fb_fragment_t *fragment, unsigned number, til_fb_fragment_t *res_fragment)
{
	return til_fb_fragment_tile_single(fragment, 64, number, res_fragment);
}


/* Helper for mapping a value to a position in the supplied NULL-terminated lsit of options.
 * Primarily useful for modules when mapping a settings value to an entry in a values array.
 * Returns 0 on success w/position @res_pos, -ENOENT when not found.
 */
int til_value_to_pos(const char **options, const char *value, unsigned *res_pos)
{
	assert(options);
	assert(value);
	assert(res_pos);

	for (unsigned i = 0; options[i]; i++) {
		if (!strcasecmp(value, options[i])) {
			*res_pos = i;
			return 0;
		}
	}

	return -ENOENT;
}
© All Rights Reserved