8 #include "cef_capture.h"
10 #include "ffmpeg_capture.h"
12 #include "image_input.h"
13 #include "input_state.h"
14 #include "lua_utils.h"
18 using namespace movit;
21 static bool display(Block *block, lua_State *L, int idx);
23 EffectType current_type(const Block *block)
25 return block->alternatives[block->currently_chosen_alternative]->effect_type;
28 int find_index_of(const Block *block, EffectType val)
30 for (size_t idx = 0; idx < block->alternatives.size(); ++idx) {
31 if (block->alternatives[idx]->effect_type == val) {
38 string get_declaration_point(lua_State *L)
41 lua_getstack(L, 1, &ar);
42 lua_getinfo(L, "nSl", &ar);
44 snprintf(buf, sizeof(buf), "%s:%d", ar.source, ar.currentline);
48 Scene::Scene(Theme *theme, float aspect_nom, float aspect_denom)
49 : theme(theme), aspect_nom(aspect_nom), aspect_denom(aspect_denom), resource_pool(theme->get_resource_pool()) {}
51 size_t Scene::compute_chain_number(bool is_main_chain) const
53 assert(chains.size() > 0);
54 assert(chains.size() % 2 == 0);
55 bitset<256> disabled = find_disabled_blocks(size_t(-1));
57 size_t chain_number = compute_chain_number_for_block(blocks.size() - 1, disabled);
58 assert(chain_number < chains.size() / 2);
60 chain_number += chains.size() / 2;
65 size_t Scene::compute_chain_number_for_block(size_t block_idx, const bitset<256> &disabled) const
67 Block *block = blocks[block_idx];
70 size_t currently_chosen_alternative;
71 if (disabled.test(block_idx)) {
72 // It doesn't matter, so pick the canonical choice
73 // (this is the only one that is actually instantiated).
74 currently_chosen_alternative = block->canonical_alternative;
76 currently_chosen_alternative = block->currently_chosen_alternative;
78 assert(currently_chosen_alternative < block->alternatives.size());
81 assert(block->cardinality_base == 1);
82 chain_number = currently_chosen_alternative;
84 chain_number = compute_chain_number_for_block(block_idx - 1, disabled) + block->cardinality_base * currently_chosen_alternative;
89 bitset<256> Scene::find_disabled_blocks(size_t chain_idx) const
91 assert(blocks.size() < 256);
93 // The find_disabled_blocks() recursion logic needs only one pass by itself,
94 // but the disabler logic is not so smart, so we just run multiple times
95 // until it converges.
96 bitset<256> prev, ret;
98 find_disabled_blocks(chain_idx, blocks.size() - 1, /*currently_disabled=*/false, &ret);
101 // Propagate DISABLE_IF_OTHER_DISABLED constraints (we can always do this).
102 for (Block *block : blocks) {
103 if (ret.test(block->idx)) continue; // Already disabled.
105 EffectType chosen_type = block->alternatives[block->chosen_alternative(chain_idx)]->effect_type;
106 if (chosen_type == IDENTITY_EFFECT) {
111 for (const Block::Disabler &disabler : block->disablers) {
112 Block *other = blocks[disabler.block_idx];
113 EffectType chosen_type = other->alternatives[other->chosen_alternative(chain_idx)]->effect_type;
114 bool other_disabled = ret.test(disabler.block_idx) || chosen_type == IDENTITY_EFFECT;
115 if (other_disabled && disabler.condition == Block::Disabler::DISABLE_IF_OTHER_DISABLED) {
122 // We cannot propagate DISABLE_IF_OTHER_ENABLED in all cases;
123 // the problem is that if A is disabled if B is enabled,
124 // then we cannot disable A unless we actually know for sure
125 // that B _is_ enabled. (E.g., imagine that B is disabled
126 // if C is enabled -- we couldn't disable A before we knew if
127 // C was enabled or not!)
129 // We could probably fix a fair amount of these, but the
130 // primary use case for DISABLE_IF_OTHER_ENABLED is really
131 // mutual exclusion; A must be disabled if B is enabled
132 // _and_ vice versa. These loops cannot be automatically
133 // resolved; it would depend on what A and B is. Thus,
134 // we simply declare this kind of constraint to be a promise
135 // from the user, not something that we'll solve for them.
136 } while (prev != ret);
140 void Scene::find_disabled_blocks(size_t chain_idx, size_t block_idx, bool currently_disabled, bitset<256> *disabled) const
142 if (currently_disabled) {
143 disabled->set(block_idx);
145 Block *block = blocks[block_idx];
146 EffectType chosen_type = block->alternatives[block->chosen_alternative(chain_idx)]->effect_type;
147 for (size_t input_idx = 0; input_idx < block->inputs.size(); ++input_idx) {
148 if (chosen_type == IDENTITY_EFFECT && input_idx > 0) {
149 // Multi-input effect that has been replaced by
150 // IdentityEffect, so every effect but the first are
151 // disabled and will not participate in the chain.
152 find_disabled_blocks(chain_idx, block->inputs[input_idx], /*currently_disabled=*/true, disabled);
154 // Just keep on recursing down.
155 find_disabled_blocks(chain_idx, block->inputs[input_idx], currently_disabled, disabled);
160 bool Scene::is_noncanonical_chain(size_t chain_idx) const
162 bitset<256> disabled = find_disabled_blocks(chain_idx);
163 assert(blocks.size() < 256);
164 for (size_t block_idx = 0; block_idx < blocks.size(); ++block_idx) {
165 Block *block = blocks[block_idx];
166 if (disabled.test(block_idx) && block->chosen_alternative(chain_idx) != block->canonical_alternative) {
170 // Test if we're supposed to be disabled by some other block being enabled;
171 // the disabled bit mask does not fully capture this.
172 if (!disabled.test(block_idx)) {
173 for (const Block::Disabler &disabler : block->disablers) {
174 if (disabler.condition == Block::Disabler::DISABLE_IF_OTHER_ENABLED &&
175 !disabled.test(disabler.block_idx)) {
180 // Auto white balance is always disabled for image inputs.
181 if (block->white_balance_controller_block != nullptr) {
182 const Block *input = block->white_balance_controller_block;
183 if (input->alternatives[input->chosen_alternative(chain_idx)]->effect_type == IMAGE_INPUT) {
192 int Scene::add_input(lua_State* L)
194 assert(lua_gettop(L) == 1 || lua_gettop(L) == 2);
195 Scene *scene = (Scene *)luaL_checkudata(L, 1, "Scene");
197 Block *block = new Block;
198 block->declaration_point = get_declaration_point(L);
199 block->idx = scene->blocks.size();
200 if (lua_gettop(L) == 1) {
201 // No parameter given, so a flexible input.
202 block->alternatives.emplace_back(new EffectBlueprint(LIVE_INPUT_YCBCR));
203 block->alternatives.emplace_back(new EffectBlueprint(LIVE_INPUT_YCBCR_WITH_DEINTERLACE));
204 block->alternatives.emplace_back(new EffectBlueprint(LIVE_INPUT_YCBCR_PLANAR));
205 block->alternatives.emplace_back(new EffectBlueprint(LIVE_INPUT_BGRA));
206 block->alternatives.emplace_back(new EffectBlueprint(IMAGE_INPUT));
208 // Input of a given type. We'll specialize it here, plus connect the input as given.
209 if (lua_isnumber(L, 2)) {
210 block->alternatives.emplace_back(new EffectBlueprint(LIVE_INPUT_YCBCR));
211 block->alternatives.emplace_back(new EffectBlueprint(LIVE_INPUT_YCBCR_WITH_DEINTERLACE));
213 if (global_flags.srt_port >= 0) {
214 block->alternatives.emplace_back(new EffectBlueprint(LIVE_INPUT_YCBCR_PLANAR));
218 } else if (luaL_testudata(L, 2, "HTMLInput")) {
219 block->alternatives.emplace_back(new EffectBlueprint(LIVE_INPUT_BGRA));
221 } else if (luaL_testudata(L, 2, "VideoInput")) {
222 FFmpegCapture *capture = *(FFmpegCapture **)luaL_checkudata(L, 2, "VideoInput");
223 if (capture->get_current_pixel_format() == bmusb::PixelFormat_8BitYCbCrPlanar) {
224 block->alternatives.emplace_back(new EffectBlueprint(LIVE_INPUT_YCBCR_PLANAR));
226 assert(capture->get_current_pixel_format() == bmusb::PixelFormat_8BitBGRA);
227 block->alternatives.emplace_back(new EffectBlueprint(LIVE_INPUT_BGRA));
229 } else if (luaL_testudata(L, 2, "ImageInput")) {
230 block->alternatives.emplace_back(new EffectBlueprint(IMAGE_INPUT));
232 luaL_error(L, "add_input() called with something that's not a signal (a signal number, a HTML input, or a VideoInput)");
234 bool ok = display(block, L, 2);
237 block->is_input = true;
238 scene->blocks.push_back(block);
240 return wrap_lua_existing_object_nonowned<Block>(L, "Block", block);
243 Block *Scene::find_block_from_arg(lua_State *L, Scene *scene, int idx)
245 if (luaL_testudata(L, idx, "Block")) {
246 return *(Block **)luaL_checkudata(L, idx, "Block");
248 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, idx, "EffectBlueprint");
250 // Search through all the blocks to figure out which one contains this effect.
251 for (Block *block : scene->blocks) {
252 if (find(block->alternatives.begin(), block->alternatives.end(), blueprint) != block->alternatives.end()) {
256 luaL_error(L, "Input effect in parameter #%d has not been added to this scene", idx - 1);
257 return nullptr; // Dead code.
261 void Scene::find_inputs_for_block(lua_State *L, Scene *scene, Block *block, int first_input_idx)
263 if (lua_gettop(L) == first_input_idx - 1) {
264 // Implicitly the last added effect.
265 assert(!scene->blocks.empty());
266 block->inputs.push_back(scene->blocks.size() - 1);
270 for (int idx = first_input_idx; idx <= lua_gettop(L); ++idx) {
271 block->inputs.push_back(find_block_from_arg(L, scene, idx)->idx);
275 int Scene::add_effect(lua_State* L)
277 assert(lua_gettop(L) >= 2);
278 Scene *scene = (Scene *)luaL_checkudata(L, 1, "Scene");
280 Block *block = new Block;
281 block->declaration_point = get_declaration_point(L);
282 block->idx = scene->blocks.size();
284 if (lua_istable(L, 2)) {
285 size_t len = lua_objlen(L, 2);
286 for (size_t i = 0; i < len; ++i) {
287 lua_rawgeti(L, 2, i + 1);
288 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, -1, "EffectBlueprint");
289 block->alternatives.push_back(blueprint);
293 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 2, "EffectBlueprint");
294 block->alternatives.push_back(blueprint);
297 int identity_index = find_index_of(block, IDENTITY_EFFECT);
298 if (identity_index == -1) {
299 block->canonical_alternative = 0;
301 // Pick the IdentityEffect as the canonical alternative, in case it
302 // helps us disable more stuff.
303 block->canonical_alternative = identity_index;
306 find_inputs_for_block(L, scene, block);
307 scene->blocks.push_back(block);
309 return wrap_lua_existing_object_nonowned<Block>(L, "Block", block);
312 int Scene::add_optional_effect(lua_State* L)
314 assert(lua_gettop(L) >= 2);
315 Scene *scene = (Scene *)luaL_checkudata(L, 1, "Scene");
317 Block *block = new Block;
318 block->declaration_point = get_declaration_point(L);
319 block->idx = scene->blocks.size();
321 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 2, "EffectBlueprint");
322 block->alternatives.push_back(blueprint);
324 // An IdentityEffect will be the alternative for when the effect is disabled.
325 block->alternatives.push_back(new EffectBlueprint(IDENTITY_EFFECT));
327 block->canonical_alternative = 1;
329 find_inputs_for_block(L, scene, block);
330 scene->blocks.push_back(block);
332 return wrap_lua_existing_object_nonowned<Block>(L, "Block", block);
335 const Block *Scene::find_root_input_block(lua_State *L, const Block *block)
337 if (block->is_input) {
338 assert(block->inputs.size() == 0);
342 const Block *ret = nullptr;
343 for (size_t input_idx : block->inputs) {
344 const Block *parent = find_root_input_block(L, blocks[input_idx]);
345 if (parent != nullptr) {
346 if (ret != nullptr) {
347 luaL_error(L, "add_white_balance() was connected to more than one input");
355 int Scene::add_white_balance(lua_State* L)
357 assert(lua_gettop(L) >= 1);
358 Scene *scene = (Scene *)luaL_checkudata(L, 1, "Scene");
360 Block *block = new Block;
361 block->declaration_point = get_declaration_point(L);
362 block->idx = scene->blocks.size();
364 block->alternatives.push_back(new EffectBlueprint(WHITE_BALANCE_EFFECT));
365 block->alternatives.push_back(new EffectBlueprint(IDENTITY_EFFECT));
367 block->canonical_alternative = 1;
369 if (lua_gettop(L) == 1) {
370 // The last added effect is implicitly both the input and gives the white balance controller.
371 assert(!scene->blocks.empty());
372 block->inputs.push_back(scene->blocks.size() - 1);
373 block->white_balance_controller_block = scene->find_root_input_block(L, block);
374 } else if (lua_gettop(L) == 2) {
375 // The given effect is both the input and the white balance controller.
376 block->inputs.push_back(find_block_from_arg(L, scene, 2)->idx);
377 block->white_balance_controller_block = scene->find_root_input_block(L, block);
378 } else if (lua_gettop(L) == 3) {
379 // We have explicit input and white balance controller.
380 block->inputs.push_back(find_block_from_arg(L, scene, 2)->idx);
381 block->white_balance_controller_block = find_block_from_arg(L, scene, 3);
383 luaL_error(L, "add_white_balance([input], [white_balance_controller]) takes zero, one or two arguments");
385 if (block->white_balance_controller_block == nullptr || !block->white_balance_controller_block->is_input) {
386 luaL_error(L, "add_white_balance() does not get its white balance from an input");
389 scene->blocks.push_back(block);
391 return wrap_lua_existing_object_nonowned<Block>(L, "Block", block);
394 Effect *Scene::instantiate_effects(const Block *block, size_t chain_idx, Scene::Instantiation *instantiation)
396 // Find the chosen alternative for this block in this instance.
397 EffectType chosen_type = block->alternatives[block->chosen_alternative(chain_idx)]->effect_type;
399 vector<Effect *> inputs;
400 for (size_t input_idx : block->inputs) {
401 inputs.push_back(instantiate_effects(blocks[input_idx], chain_idx, instantiation));
403 // As a special case, we allow IdentityEffect to take only one input
404 // even if the other alternative (or alternatives) is multi-input.
405 // Thus, even if there are more than one inputs, instantiate only
407 if (chosen_type == IDENTITY_EFFECT) {
413 switch (chosen_type) {
414 case LIVE_INPUT_YCBCR:
415 case LIVE_INPUT_YCBCR_WITH_DEINTERLACE:
416 case LIVE_INPUT_YCBCR_PLANAR:
417 case LIVE_INPUT_BGRA: {
418 bool deinterlace = (chosen_type == LIVE_INPUT_YCBCR_WITH_DEINTERLACE);
419 bool override_bounce = !deinterlace; // For most chains, this will be fine. Reconsider if we see real problems somewhere; it's better than having the user try to understand it.
420 bmusb::PixelFormat pixel_format;
421 if (chosen_type == LIVE_INPUT_BGRA) {
422 pixel_format = bmusb::PixelFormat_8BitBGRA;
423 } else if (chosen_type == LIVE_INPUT_YCBCR_PLANAR) {
424 pixel_format = bmusb::PixelFormat_8BitYCbCrPlanar;
425 } else if (global_flags.bit_depth > 8) {
426 pixel_format = bmusb::PixelFormat_10BitYCbCr;
428 pixel_format = bmusb::PixelFormat_8BitYCbCr;
430 LiveInputWrapper *input = new LiveInputWrapper(theme, instantiation->chain.get(), pixel_format, override_bounce, deinterlace, /*user_connectable=*/true);
431 effect = input->get_effect(); // Adds itself to the chain, so no need to call add_effect().
432 instantiation->inputs.emplace(block->idx, input);
436 ImageInput *input = new ImageInput;
437 instantiation->chain->add_input(input);
438 instantiation->image_inputs.emplace(block->idx, input);
443 effect = instantiate_effect(instantiation->chain.get(), chosen_type);
444 instantiation->chain->add_effect(effect, inputs);
447 instantiation->effects.emplace(block->idx, effect);
451 int Scene::finalize(lua_State* L)
453 bool only_one_mode = false;
454 bool chosen_mode = false;
455 if (lua_gettop(L) == 2) {
456 only_one_mode = true;
457 chosen_mode = checkbool(L, 2);
459 assert(lua_gettop(L) == 1);
461 Scene *scene = (Scene *)luaL_checkudata(L, 1, "Scene");
462 Theme *theme = get_theme_updata(L);
465 for (Block *block : scene->blocks) {
466 block->cardinality_base = base;
467 base *= block->alternatives.size();
470 const size_t cardinality = base;
471 size_t real_cardinality = 0;
472 for (size_t chain_idx = 0; chain_idx < cardinality; ++chain_idx) {
473 if (!scene->is_noncanonical_chain(chain_idx)) {
477 const size_t total_cardinality = real_cardinality * (only_one_mode ? 1 : 2);
478 if (total_cardinality > 200) {
479 print_warning(L, "The given Scene will instantiate %zu different versions. This will take a lot of time and RAM to compile; see if you could limit some options by e.g. locking the input type in some cases (by giving a fixed input to add_input()).\n",
483 Block *output_block = scene->blocks.back();
484 for (bool is_main_chain : { false, true }) {
485 for (size_t chain_idx = 0; chain_idx < cardinality; ++chain_idx) {
486 if ((only_one_mode && is_main_chain != chosen_mode) ||
487 scene->is_noncanonical_chain(chain_idx)) {
488 scene->chains.emplace_back();
492 Scene::Instantiation instantiation;
493 instantiation.chain.reset(new EffectChain(scene->aspect_nom, scene->aspect_denom, theme->get_resource_pool()));
494 scene->instantiate_effects(output_block, chain_idx, &instantiation);
496 add_outputs_and_finalize(instantiation.chain.get(), is_main_chain);
497 scene->chains.emplace_back(move(instantiation));
503 int find_card_to_connect(Theme *theme, lua_State *L, const Block *block)
505 if (block->signal_type_to_connect == Block::CONNECT_SIGNAL) {
506 return theme->map_signal_to_card(block->signal_to_connect);
508 } else if (block->signal_type_to_connect == Block::CONNECT_CEF) {
509 return block->cef_to_connect->get_card_index();
511 } else if (block->signal_type_to_connect == Block::CONNECT_VIDEO) {
512 return block->video_to_connect->get_card_index();
513 } else if (block->signal_type_to_connect == Block::CONNECT_NONE) {
514 luaL_error(L, "An input in a scene was not connected to anything (forgot to call display())");
521 std::pair<movit::EffectChain *, std::function<void()>>
522 Scene::get_chain(Theme *theme, lua_State *L, unsigned num, const InputState &input_state)
524 // For video inputs, pick the right interlaced/progressive version
525 // based on the current state of the signals.
526 InputStateInfo info(input_state);
527 for (Block *block : blocks) {
528 if (block->is_input && block->signal_type_to_connect == Block::CONNECT_SIGNAL) {
529 int card_index = theme->map_signal_to_card(block->signal_to_connect);
530 if (info.last_interlaced[card_index]) {
531 assert(info.last_pixel_format[card_index] == bmusb::PixelFormat_8BitYCbCr ||
532 info.last_pixel_format[card_index] == bmusb::PixelFormat_10BitYCbCr);
533 block->currently_chosen_alternative = find_index_of(block, LIVE_INPUT_YCBCR_WITH_DEINTERLACE);
534 } else if (info.last_pixel_format[card_index] == bmusb::PixelFormat_8BitYCbCrPlanar) {
535 block->currently_chosen_alternative = find_index_of(block, LIVE_INPUT_YCBCR_PLANAR);
536 } else if (info.last_pixel_format[card_index] == bmusb::PixelFormat_8BitBGRA) {
537 block->currently_chosen_alternative = find_index_of(block, LIVE_INPUT_BGRA);
539 block->currently_chosen_alternative = find_index_of(block, LIVE_INPUT_YCBCR);
541 if (block->currently_chosen_alternative == -1) {
542 fprintf(stderr, "ERROR: Input connected to a video card pixel format that it was not ready for.\n");
548 // Find all auto white balance blocks, turn on and off the effect as needed,
549 // and fetch the actual white balance set (it is stored in Theme).
550 map<Block *, array<float, 3>> white_balance;
551 for (size_t block_idx = 0; block_idx < blocks.size(); ++block_idx) {
552 Block *block = blocks[block_idx];
553 const Block *input = block->white_balance_controller_block;
554 if (input == nullptr) {
555 continue; // Not an auto white balance block.
558 EffectType chosen_type = current_type(input);
559 if (chosen_type == IMAGE_INPUT) {
560 // Image inputs never get white balance applied.
561 block->currently_chosen_alternative = find_index_of(block, IDENTITY_EFFECT);
565 assert(chosen_type == LIVE_INPUT_YCBCR ||
566 chosen_type == LIVE_INPUT_YCBCR_WITH_DEINTERLACE ||
567 chosen_type == LIVE_INPUT_YCBCR_PLANAR ||
568 chosen_type == LIVE_INPUT_BGRA);
569 int card_idx = find_card_to_connect(theme, L, input);
570 RGBTriplet wb = theme->get_white_balance_for_card(card_idx);
571 if (fabs(wb.r - 1.0) < 1e-3 && fabs(wb.g - 1.0) < 1e-3 && fabs(wb.b - 1.0) < 1e-3) {
572 // Neutral white balance.
573 block->currently_chosen_alternative = find_index_of(block, IDENTITY_EFFECT);
575 block->currently_chosen_alternative = find_index_of(block, WHITE_BALANCE_EFFECT);
576 white_balance.emplace(block, array<float, 3>{ wb.r, wb.g, wb.b });
580 // Pick out the right chain based on the current selections,
581 // and snapshot all the set variables so that we can set them
582 // in the prepare function even if they're being changed by
583 // the Lua code later.
584 bool is_main_chain = (num == 0);
585 size_t chain_idx = compute_chain_number(is_main_chain);
586 if (is_noncanonical_chain(chain_idx)) {
587 // This should be due to promise_to_disable_if_enabled(). Find out what
588 // happened, to give the user some help.
589 bitset<256> disabled = find_disabled_blocks(chain_idx);
590 for (size_t block_idx = 0; block_idx < blocks.size(); ++block_idx) {
591 Block *block = blocks[block_idx];
592 if (disabled.test(block_idx)) continue;
593 for (const Block::Disabler &disabler : block->disablers) {
594 if (disabler.condition == Block::Disabler::DISABLE_IF_OTHER_ENABLED &&
595 !disabled.test(disabler.block_idx)) {
596 fprintf(stderr, "Promise declared at %s violated.\n", disabler.declaration_point.c_str());
601 assert(false); // Something else happened, seemingly.
603 const Scene::Instantiation &instantiation = chains[chain_idx];
604 EffectChain *effect_chain = instantiation.chain.get();
606 map<LiveInputWrapper *, int> cards_to_connect;
607 map<ImageInput *, string> images_to_select;
608 map<pair<Effect *, string>, int> int_to_set;
609 map<pair<Effect *, string>, float> float_to_set;
610 map<pair<Effect *, string>, array<float, 3>> vec3_to_set;
611 map<pair<Effect *, string>, array<float, 4>> vec4_to_set;
612 for (const auto &index_and_input : instantiation.inputs) {
613 Block *block = blocks[index_and_input.first];
614 EffectType chosen_type = current_type(block);
615 if (chosen_type == LIVE_INPUT_YCBCR ||
616 chosen_type == LIVE_INPUT_YCBCR_WITH_DEINTERLACE ||
617 chosen_type == LIVE_INPUT_YCBCR_PLANAR ||
618 chosen_type == LIVE_INPUT_BGRA) {
619 LiveInputWrapper *input = index_and_input.second;
620 cards_to_connect.emplace(input, find_card_to_connect(theme, L, block));
623 for (const auto &index_and_input : instantiation.image_inputs) {
624 Block *block = blocks[index_and_input.first];
625 ImageInput *input = index_and_input.second;
626 if (current_type(block) == IMAGE_INPUT) {
627 images_to_select.emplace(input, block->pathname);
630 for (const auto &index_and_effect : instantiation.effects) {
631 Block *block = blocks[index_and_effect.first];
632 Effect *effect = index_and_effect.second;
634 bool missing_width = (current_type(block) == RESIZE_EFFECT ||
635 current_type(block) == RESAMPLE_EFFECT ||
636 current_type(block) == PADDING_EFFECT);
637 bool missing_height = missing_width;
639 // Get the effects currently set on the block.
640 if (current_type(block) != IDENTITY_EFFECT) { // Ignore settings on optional effects.
641 if (block->int_parameters.count("width") && block->int_parameters["width"] > 0) {
642 missing_width = false;
644 if (block->int_parameters.count("height") && block->int_parameters["height"] > 0) {
645 missing_height = false;
647 for (const auto &key_and_tuple : block->int_parameters) {
648 int_to_set.emplace(make_pair(effect, key_and_tuple.first), key_and_tuple.second);
650 for (const auto &key_and_tuple : block->float_parameters) {
651 float_to_set.emplace(make_pair(effect, key_and_tuple.first), key_and_tuple.second);
653 if (white_balance.count(block)) {
654 vec3_to_set.emplace(make_pair(effect, "neutral_color"), white_balance[block]);
656 for (const auto &key_and_tuple : block->vec3_parameters) {
657 vec3_to_set.emplace(make_pair(effect, key_and_tuple.first), key_and_tuple.second);
659 for (const auto &key_and_tuple : block->vec4_parameters) {
660 vec4_to_set.emplace(make_pair(effect, key_and_tuple.first), key_and_tuple.second);
664 // Parameters set on the blueprint itself override those that are set for the block,
665 // so they are set afterwards.
666 if (!block->alternatives.empty()) {
667 EffectBlueprint *blueprint = block->alternatives[block->currently_chosen_alternative];
668 if (blueprint->int_parameters.count("width") && blueprint->int_parameters["width"] > 0) {
669 missing_width = false;
671 if (blueprint->int_parameters.count("height") && blueprint->int_parameters["height"] > 0) {
672 missing_height = false;
674 for (const auto &key_and_tuple : blueprint->int_parameters) {
675 int_to_set[make_pair(effect, key_and_tuple.first)] = key_and_tuple.second;
677 for (const auto &key_and_tuple : blueprint->float_parameters) {
678 float_to_set[make_pair(effect, key_and_tuple.first)] = key_and_tuple.second;
680 for (const auto &key_and_tuple : blueprint->vec3_parameters) {
681 vec3_to_set[make_pair(effect, key_and_tuple.first)] = key_and_tuple.second;
683 for (const auto &key_and_tuple : blueprint->vec4_parameters) {
684 vec4_to_set[make_pair(effect, key_and_tuple.first)] = key_and_tuple.second;
688 if (missing_width || missing_height) {
689 fprintf(stderr, "WARNING: Unset or nonpositive width/height for effect declared at %s "
690 "when getting scene for signal %u; setting to 1x1 to avoid crash.\n",
691 block->declaration_point.c_str(), num);
692 int_to_set[make_pair(effect, "width")] = 1;
693 int_to_set[make_pair(effect, "height")] = 1;
699 auto setup_chain = [L, theme, cards_to_connect, images_to_select, int_to_set, float_to_set, vec3_to_set, vec4_to_set, input_state]{
700 lock_guard<mutex> lock(theme->m);
702 // Set up state, including connecting cards.
703 for (const auto &input_and_card : cards_to_connect) {
704 LiveInputWrapper *input = input_and_card.first;
705 input->connect_card(input_and_card.second, input_state);
707 for (const auto &input_and_filename : images_to_select) {
708 input_and_filename.first->switch_image(input_and_filename.second);
710 for (const auto &effect_and_key_and_value : int_to_set) {
711 Effect *effect = effect_and_key_and_value.first.first;
712 const string &key = effect_and_key_and_value.first.second;
713 const int value = effect_and_key_and_value.second;
714 if (!effect->set_int(key, value)) {
715 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", key.c_str(), value);
718 for (const auto &effect_and_key_and_value : float_to_set) {
719 Effect *effect = effect_and_key_and_value.first.first;
720 const string &key = effect_and_key_and_value.first.second;
721 const float value = effect_and_key_and_value.second;
722 if (!effect->set_float(key, value)) {
723 luaL_error(L, "Effect refused set_float(\"%s\", %f) (invalid key?)", key.c_str(), value);
726 for (const auto &effect_and_key_and_value : vec3_to_set) {
727 Effect *effect = effect_and_key_and_value.first.first;
728 const string &key = effect_and_key_and_value.first.second;
729 const float *value = effect_and_key_and_value.second.data();
730 if (!effect->set_vec3(key, value)) {
731 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", key.c_str(),
732 value[0], value[1], value[2]);
735 for (const auto &effect_and_key_and_value : vec4_to_set) {
736 Effect *effect = effect_and_key_and_value.first.first;
737 const string &key = effect_and_key_and_value.first.second;
738 const float *value = effect_and_key_and_value.second.data();
739 if (!effect->set_vec4(key, value)) {
740 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", key.c_str(),
741 value[0], value[1], value[2], value[3]);
745 return make_pair(effect_chain, move(setup_chain));
748 bool display(Block *block, lua_State *L, int idx)
750 if (lua_isnumber(L, idx)) {
751 int signal_idx = luaL_checknumber(L, idx);
752 block->signal_type_to_connect = Block::CONNECT_SIGNAL;
753 block->signal_to_connect = signal_idx;
754 block->currently_chosen_alternative = find_index_of(block, LIVE_INPUT_YCBCR); // Will be changed to deinterlaced at get_chain() time if needed.
757 } else if (luaL_testudata(L, idx, "HTMLInput")) {
758 CEFCapture *capture = *(CEFCapture **)luaL_checkudata(L, idx, "HTMLInput");
759 block->signal_type_to_connect = Block::CONNECT_CEF;
760 block->cef_to_connect = capture;
761 block->currently_chosen_alternative = find_index_of(block, LIVE_INPUT_BGRA);
762 assert(capture->get_current_pixel_format() == bmusb::PixelFormat_8BitBGRA);
765 } else if (luaL_testudata(L, idx, "VideoInput")) {
766 FFmpegCapture *capture = *(FFmpegCapture **)luaL_checkudata(L, idx, "VideoInput");
767 block->signal_type_to_connect = Block::CONNECT_VIDEO;
768 block->video_to_connect = capture;
769 if (capture->get_current_pixel_format() == bmusb::PixelFormat_8BitYCbCrPlanar) {
770 block->currently_chosen_alternative = find_index_of(block, LIVE_INPUT_YCBCR_PLANAR);
772 assert(capture->get_current_pixel_format() == bmusb::PixelFormat_8BitBGRA);
773 block->currently_chosen_alternative = find_index_of(block, LIVE_INPUT_BGRA);
776 } else if (luaL_testudata(L, idx, "ImageInput")) {
777 ImageInput *image = *(ImageInput **)luaL_checkudata(L, idx, "ImageInput");
778 block->signal_type_to_connect = Block::CONNECT_NONE;
779 block->currently_chosen_alternative = find_index_of(block, IMAGE_INPUT);
780 block->pathname = image->get_pathname();
787 int Block_display(lua_State* L)
789 assert(lua_gettop(L) == 2);
790 Block *block = *(Block **)luaL_checkudata(L, 1, "Block");
791 if (!block->is_input) {
792 luaL_error(L, "display() called on something that isn't an input");
795 bool ok = display(block, L, 2);
797 luaL_error(L, "display() called with something that's not a signal (a signal number, a HTML input, or a VideoInput)");
800 if (block->currently_chosen_alternative == -1) {
801 luaL_error(L, "display() called on an input whose type was fixed at construction time, with a signal of different type");
807 int Block_choose(lua_State* L)
809 assert(lua_gettop(L) == 2);
810 Block *block = *(Block **)luaL_checkudata(L, 1, "Block");
811 int alternative_idx = -1;
812 if (lua_isnumber(L, 2)) {
813 alternative_idx = luaL_checknumber(L, 2);
814 } else if (lua_istable(L, 2)) {
815 // See if it's an Effect metatable (e.g. foo:choose(ResampleEffect))
816 lua_getfield(L, 2, "__effect_type_id");
817 if (lua_isnumber(L, -1)) {
818 EffectType effect_type = EffectType(luaL_checknumber(L, -1));
819 alternative_idx = find_index_of(block, effect_type);
824 if (alternative_idx == -1) {
825 luaL_error(L, "choose() called with something that was not an index or an effect type (e.g. ResampleEffect) that was part of the alternatives");
828 assert(alternative_idx >= 0);
829 assert(size_t(alternative_idx) < block->alternatives.size());
830 block->currently_chosen_alternative = alternative_idx;
832 return wrap_lua_existing_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", block->alternatives[alternative_idx]);
835 int Block_enable(lua_State *L)
837 assert(lua_gettop(L) == 1);
838 Block *block = *(Block **)luaL_checkudata(L, 1, "Block");
840 if (block->alternatives.size() != 2 ||
841 block->alternatives[1]->effect_type != IDENTITY_EFFECT) {
842 luaL_error(L, "enable() called on something that wasn't added with add_optional_effect()");
844 block->currently_chosen_alternative = 0; // The actual effect.
848 int Block_enable_if(lua_State *L)
850 assert(lua_gettop(L) == 2);
851 Block *block = *(Block **)luaL_checkudata(L, 1, "Block");
853 if (block->alternatives.size() != 2 ||
854 block->alternatives[1]->effect_type != IDENTITY_EFFECT) {
855 luaL_error(L, "enable_if() called on something that wasn't added with add_optional_effect()");
857 bool enabled = checkbool(L, 2);
858 block->currently_chosen_alternative = enabled ? 0 : 1;
862 int Block_disable(lua_State *L)
864 assert(lua_gettop(L) == 1);
865 Block *block = *(Block **)luaL_checkudata(L, 1, "Block");
867 block->currently_chosen_alternative = find_index_of(block, IDENTITY_EFFECT);
868 if (block->currently_chosen_alternative == -1) {
869 luaL_error(L, "disable() called on something that didn't have an IdentityEffect fallback (try add_optional_effect())");
871 assert(block->currently_chosen_alternative != -1);
875 int Block_always_disable_if_disabled(lua_State *L)
877 assert(lua_gettop(L) == 2);
878 Block *block = *(Block **)luaL_checkudata(L, 1, "Block");
879 Block *disabler_block = *(Block **)luaL_checkudata(L, 2, "Block");
881 int my_alternative = find_index_of(block, IDENTITY_EFFECT);
882 int their_alternative = find_index_of(disabler_block, IDENTITY_EFFECT);
883 if (my_alternative == -1) {
884 luaL_error(L, "always_disable_if_disabled() called on something that didn't have an IdentityEffect fallback (try add_optional_effect())");
886 if (their_alternative == -1) {
887 luaL_error(L, "always_disable_if_disabled() with an argument that didn't have an IdentityEffect fallback (try add_optional_effect())");
890 // The declaration point isn't actually used, but it's nice for completeness.
891 block->disablers.push_back(Block::Disabler{ disabler_block->idx, Block::Disabler::DISABLE_IF_OTHER_DISABLED, get_declaration_point(L) });
897 int Block_promise_to_disable_if_enabled(lua_State *L)
899 assert(lua_gettop(L) == 2);
900 Block *block = *(Block **)luaL_checkudata(L, 1, "Block");
901 Block *disabler_block = *(Block **)luaL_checkudata(L, 2, "Block");
903 int my_alternative = find_index_of(block, IDENTITY_EFFECT);
904 int their_alternative = find_index_of(disabler_block, IDENTITY_EFFECT);
905 if (my_alternative == -1) {
906 luaL_error(L, "promise_to_disable_if_enabled() called on something that didn't have an IdentityEffect fallback (try add_optional_effect())");
908 if (their_alternative == -1) {
909 luaL_error(L, "promise_to_disable_if_enabled() with an argument that didn't have an IdentityEffect fallback (try add_optional_effect())");
912 block->disablers.push_back(Block::Disabler{ disabler_block->idx, Block::Disabler::DISABLE_IF_OTHER_ENABLED, get_declaration_point(L) });
918 int Block_set_int(lua_State *L)
920 assert(lua_gettop(L) == 3);
921 Block *block = *(Block **)luaL_checkudata(L, 1, "Block");
922 string key = checkstdstring(L, 2);
923 float value = luaL_checknumber(L, 3);
925 // TODO: check validity already here, if possible?
926 block->int_parameters[key] = value;
931 int Block_set_float(lua_State *L)
933 assert(lua_gettop(L) == 3);
934 Block *block = *(Block **)luaL_checkudata(L, 1, "Block");
935 string key = checkstdstring(L, 2);
936 float value = luaL_checknumber(L, 3);
938 // TODO: check validity already here, if possible?
939 block->float_parameters[key] = value;
944 int Block_set_vec3(lua_State *L)
946 assert(lua_gettop(L) == 5);
947 Block *block = *(Block **)luaL_checkudata(L, 1, "Block");
948 string key = checkstdstring(L, 2);
950 v[0] = luaL_checknumber(L, 3);
951 v[1] = luaL_checknumber(L, 4);
952 v[2] = luaL_checknumber(L, 5);
954 // TODO: check validity already here, if possible?
955 block->vec3_parameters[key] = v;
960 int Block_set_vec4(lua_State *L)
962 assert(lua_gettop(L) == 6);
963 Block *block = *(Block **)luaL_checkudata(L, 1, "Block");
964 string key = checkstdstring(L, 2);
966 v[0] = luaL_checknumber(L, 3);
967 v[1] = luaL_checknumber(L, 4);
968 v[2] = luaL_checknumber(L, 5);
969 v[3] = luaL_checknumber(L, 6);
971 // TODO: check validity already here, if possible?
972 block->vec4_parameters[key] = v;