7 #include <movit/effect.h>
8 #include <movit/effect_chain.h>
9 #include <movit/image_format.h>
10 #include <movit/mix_effect.h>
11 #include <movit/overlay_effect.h>
12 #include <movit/padding_effect.h>
13 #include <movit/resample_effect.h>
14 #include <movit/resize_effect.h>
15 #include <movit/util.h>
16 #include <movit/white_balance_effect.h>
17 #include <movit/ycbcr.h>
18 #include <movit/ycbcr_input.h>
27 #include "image_input.h"
35 using namespace movit;
37 extern Mixer *global_mixer;
41 // Contains basically the same data as InputState, but does not hold on to
42 // a reference to the frames. This is important so that we can release them
43 // without having to wait for Lua's GC.
44 struct InputStateInfo {
45 InputStateInfo(const InputState& input_state);
47 unsigned last_width[MAX_CARDS], last_height[MAX_CARDS];
48 bool last_interlaced[MAX_CARDS];
49 unsigned last_frame_rate_nom[MAX_CARDS], last_frame_rate_den[MAX_CARDS];
52 InputStateInfo::InputStateInfo(const InputState &input_state)
54 for (unsigned signal_num = 0; signal_num < MAX_CARDS; ++signal_num) {
55 BufferedFrame frame = input_state.buffered_frames[signal_num][0];
56 if (frame.frame == nullptr) {
57 last_width[signal_num] = last_height[signal_num] = 0;
58 last_interlaced[signal_num] = false;
61 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
62 last_width[signal_num] = userdata->last_width[frame.field_number];
63 last_height[signal_num] = userdata->last_height[frame.field_number];
64 last_interlaced[signal_num] = userdata->last_interlaced;
65 last_frame_rate_nom[signal_num] = userdata->last_frame_rate_nom;
66 last_frame_rate_den[signal_num] = userdata->last_frame_rate_den;
70 class LuaRefWithDeleter {
72 LuaRefWithDeleter(mutex *m, lua_State *L, int ref) : m(m), L(L), ref(ref) {}
73 ~LuaRefWithDeleter() {
74 unique_lock<mutex> lock(*m);
75 luaL_unref(L, LUA_REGISTRYINDEX, ref);
77 int get() const { return ref; }
80 LuaRefWithDeleter(const LuaRefWithDeleter &) = delete;
87 template<class T, class... Args>
88 int wrap_lua_object(lua_State* L, const char *class_name, Args&&... args)
90 // Construct the C++ object and put it on the stack.
91 void *mem = lua_newuserdata(L, sizeof(T));
92 new(mem) T(std::forward<Args>(args)...);
94 // Look up the metatable named <class_name>, and set it on the new object.
95 luaL_getmetatable(L, class_name);
96 lua_setmetatable(L, -2);
101 Theme *get_theme_updata(lua_State* L)
103 luaL_checktype(L, lua_upvalueindex(1), LUA_TLIGHTUSERDATA);
104 return (Theme *)lua_touserdata(L, lua_upvalueindex(1));
107 Effect *get_effect(lua_State *L, int idx)
109 if (luaL_testudata(L, idx, "WhiteBalanceEffect") ||
110 luaL_testudata(L, idx, "ResampleEffect") ||
111 luaL_testudata(L, idx, "PaddingEffect") ||
112 luaL_testudata(L, idx, "IntegralPaddingEffect") ||
113 luaL_testudata(L, idx, "OverlayEffect") ||
114 luaL_testudata(L, idx, "ResizeEffect") ||
115 luaL_testudata(L, idx, "MixEffect") ||
116 luaL_testudata(L, idx, "ImageInput")) {
117 return (Effect *)lua_touserdata(L, idx);
119 luaL_error(L, "Error: Index #%d was not an Effect type\n", idx);
123 InputStateInfo *get_input_state_info(lua_State *L, int idx)
125 if (luaL_testudata(L, idx, "InputStateInfo")) {
126 return (InputStateInfo *)lua_touserdata(L, idx);
128 luaL_error(L, "Error: Index #%d was not InputStateInfo\n", idx);
132 bool checkbool(lua_State* L, int idx)
134 luaL_checktype(L, idx, LUA_TBOOLEAN);
135 return lua_toboolean(L, idx);
138 std::string checkstdstring(lua_State *L, int index)
141 const char* cstr = lua_tolstring(L, index, &len);
142 return std::string(cstr, len);
145 int EffectChain_new(lua_State* L)
147 assert(lua_gettop(L) == 2);
148 Theme *theme = get_theme_updata(L);
149 int aspect_w = luaL_checknumber(L, 1);
150 int aspect_h = luaL_checknumber(L, 2);
152 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h, theme->get_resource_pool());
155 int EffectChain_add_live_input(lua_State* L)
157 assert(lua_gettop(L) == 3);
158 Theme *theme = get_theme_updata(L);
159 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
160 bool override_bounce = checkbool(L, 2);
161 bool deinterlace = checkbool(L, 3);
162 return wrap_lua_object<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain, override_bounce, deinterlace);
165 int EffectChain_add_effect(lua_State* L)
167 assert(lua_gettop(L) >= 2);
168 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
170 // TODO: Better error reporting.
171 Effect *effect = get_effect(L, 2);
172 if (lua_gettop(L) == 2) {
173 if (effect->num_inputs() == 0) {
174 chain->add_input((Input *)effect);
176 chain->add_effect(effect);
179 vector<Effect *> inputs;
180 for (int idx = 3; idx <= lua_gettop(L); ++idx) {
181 if (luaL_testudata(L, idx, "LiveInputWrapper")) {
182 LiveInputWrapper *input = (LiveInputWrapper *)lua_touserdata(L, idx);
183 inputs.push_back(input->get_effect());
185 inputs.push_back(get_effect(L, idx));
188 chain->add_effect(effect, inputs);
191 lua_settop(L, 2); // Return the effect itself.
193 // Make sure Lua doesn't garbage-collect it away.
194 lua_pushvalue(L, -1);
195 luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak?
200 int EffectChain_finalize(lua_State* L)
202 assert(lua_gettop(L) == 2);
203 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
204 bool is_main_chain = checkbool(L, 2);
206 // Add outputs as needed.
207 // NOTE: If you change any details about the output format, you will need to
208 // also update what's given to the muxer (HTTPD::Mux constructor) and
209 // what's put in the H.264 stream (sps_rbsp()).
210 ImageFormat inout_format;
211 inout_format.color_space = COLORSPACE_REC_709;
213 // Output gamma is tricky. We should output Rec. 709 for TV, except that
214 // we expect to run with web players and others that don't really care and
215 // just output with no conversion. So that means we'll need to output sRGB,
216 // even though H.264 has no setting for that (we use “unspecified”).
217 inout_format.gamma_curve = GAMMA_sRGB;
220 YCbCrFormat output_ycbcr_format;
221 // We actually output 4:2:0 in the end, but chroma subsampling
222 // happens in a pass not run by Movit (see Mixer::subsample_chroma()).
223 output_ycbcr_format.chroma_subsampling_x = 1;
224 output_ycbcr_format.chroma_subsampling_y = 1;
226 // Rec. 709 would be the sane thing to do, but it seems many players
227 // (e.g. MPlayer and VLC) just default to BT.601 coefficients no matter
228 // what (see discussions in e.g. https://trac.ffmpeg.org/ticket/4978).
229 // We _do_ set the right flags, though, so that a player that works
230 // properly doesn't have to guess.
231 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
232 output_ycbcr_format.full_range = false;
233 output_ycbcr_format.num_levels = 256;
235 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR);
236 chain->set_dither_bits(8);
237 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
239 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
245 int LiveInputWrapper_connect_signal(lua_State* L)
247 assert(lua_gettop(L) == 2);
248 LiveInputWrapper *input = (LiveInputWrapper *)luaL_checkudata(L, 1, "LiveInputWrapper");
249 int signal_num = luaL_checknumber(L, 2);
250 input->connect_signal(signal_num);
254 int ImageInput_new(lua_State* L)
256 assert(lua_gettop(L) == 1);
257 std::string filename = checkstdstring(L, 1);
258 return wrap_lua_object<ImageInput>(L, "ImageInput", filename);
261 int WhiteBalanceEffect_new(lua_State* L)
263 assert(lua_gettop(L) == 0);
264 return wrap_lua_object<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
267 int ResampleEffect_new(lua_State* L)
269 assert(lua_gettop(L) == 0);
270 return wrap_lua_object<ResampleEffect>(L, "ResampleEffect");
273 int PaddingEffect_new(lua_State* L)
275 assert(lua_gettop(L) == 0);
276 return wrap_lua_object<PaddingEffect>(L, "PaddingEffect");
279 int IntegralPaddingEffect_new(lua_State* L)
281 assert(lua_gettop(L) == 0);
282 return wrap_lua_object<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
285 int OverlayEffect_new(lua_State* L)
287 assert(lua_gettop(L) == 0);
288 return wrap_lua_object<OverlayEffect>(L, "OverlayEffect");
291 int ResizeEffect_new(lua_State* L)
293 assert(lua_gettop(L) == 0);
294 return wrap_lua_object<ResizeEffect>(L, "ResizeEffect");
297 int MixEffect_new(lua_State* L)
299 assert(lua_gettop(L) == 0);
300 return wrap_lua_object<MixEffect>(L, "MixEffect");
303 int InputStateInfo_get_width(lua_State* L)
305 assert(lua_gettop(L) == 2);
306 InputStateInfo *input_state_info = get_input_state_info(L, 1);
307 Theme *theme = get_theme_updata(L);
308 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
309 lua_pushnumber(L, input_state_info->last_width[signal_num]);
313 int InputStateInfo_get_height(lua_State* L)
315 assert(lua_gettop(L) == 2);
316 InputStateInfo *input_state_info = get_input_state_info(L, 1);
317 Theme *theme = get_theme_updata(L);
318 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
319 lua_pushnumber(L, input_state_info->last_height[signal_num]);
323 int InputStateInfo_get_interlaced(lua_State* L)
325 assert(lua_gettop(L) == 2);
326 InputStateInfo *input_state_info = get_input_state_info(L, 1);
327 Theme *theme = get_theme_updata(L);
328 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
329 lua_pushboolean(L, input_state_info->last_interlaced[signal_num]);
333 int InputStateInfo_get_frame_rate_nom(lua_State* L)
335 assert(lua_gettop(L) == 2);
336 InputStateInfo *input_state_info = get_input_state_info(L, 1);
337 Theme *theme = get_theme_updata(L);
338 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
339 lua_pushnumber(L, input_state_info->last_frame_rate_nom[signal_num]);
343 int InputStateInfo_get_frame_rate_den(lua_State* L)
345 assert(lua_gettop(L) == 2);
346 InputStateInfo *input_state_info = get_input_state_info(L, 1);
347 Theme *theme = get_theme_updata(L);
348 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
349 lua_pushnumber(L, input_state_info->last_frame_rate_den[signal_num]);
353 int Effect_set_float(lua_State *L)
355 assert(lua_gettop(L) == 3);
356 Effect *effect = (Effect *)get_effect(L, 1);
357 std::string key = checkstdstring(L, 2);
358 float value = luaL_checknumber(L, 3);
359 if (!effect->set_float(key, value)) {
360 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
365 int Effect_set_int(lua_State *L)
367 assert(lua_gettop(L) == 3);
368 Effect *effect = (Effect *)get_effect(L, 1);
369 std::string key = checkstdstring(L, 2);
370 float value = luaL_checknumber(L, 3);
371 if (!effect->set_int(key, value)) {
372 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
377 int Effect_set_vec3(lua_State *L)
379 assert(lua_gettop(L) == 5);
380 Effect *effect = (Effect *)get_effect(L, 1);
381 std::string key = checkstdstring(L, 2);
383 v[0] = luaL_checknumber(L, 3);
384 v[1] = luaL_checknumber(L, 4);
385 v[2] = luaL_checknumber(L, 5);
386 if (!effect->set_vec3(key, v)) {
387 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", key.c_str(),
393 int Effect_set_vec4(lua_State *L)
395 assert(lua_gettop(L) == 6);
396 Effect *effect = (Effect *)get_effect(L, 1);
397 std::string key = checkstdstring(L, 2);
399 v[0] = luaL_checknumber(L, 3);
400 v[1] = luaL_checknumber(L, 4);
401 v[2] = luaL_checknumber(L, 5);
402 v[3] = luaL_checknumber(L, 6);
403 if (!effect->set_vec4(key, v)) {
404 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", key.c_str(),
405 v[0], v[1], v[2], v[3]);
410 const luaL_Reg EffectChain_funcs[] = {
411 { "new", EffectChain_new },
412 { "add_live_input", EffectChain_add_live_input },
413 { "add_effect", EffectChain_add_effect },
414 { "finalize", EffectChain_finalize },
418 const luaL_Reg LiveInputWrapper_funcs[] = {
419 { "connect_signal", LiveInputWrapper_connect_signal },
423 const luaL_Reg ImageInput_funcs[] = {
424 { "new", ImageInput_new },
425 { "set_float", Effect_set_float },
426 { "set_int", Effect_set_int },
427 { "set_vec3", Effect_set_vec3 },
428 { "set_vec4", Effect_set_vec4 },
432 const luaL_Reg WhiteBalanceEffect_funcs[] = {
433 { "new", WhiteBalanceEffect_new },
434 { "set_float", Effect_set_float },
435 { "set_int", Effect_set_int },
436 { "set_vec3", Effect_set_vec3 },
437 { "set_vec4", Effect_set_vec4 },
441 const luaL_Reg ResampleEffect_funcs[] = {
442 { "new", ResampleEffect_new },
443 { "set_float", Effect_set_float },
444 { "set_int", Effect_set_int },
445 { "set_vec3", Effect_set_vec3 },
446 { "set_vec4", Effect_set_vec4 },
450 const luaL_Reg PaddingEffect_funcs[] = {
451 { "new", PaddingEffect_new },
452 { "set_float", Effect_set_float },
453 { "set_int", Effect_set_int },
454 { "set_vec3", Effect_set_vec3 },
455 { "set_vec4", Effect_set_vec4 },
459 const luaL_Reg IntegralPaddingEffect_funcs[] = {
460 { "new", IntegralPaddingEffect_new },
461 { "set_float", Effect_set_float },
462 { "set_int", Effect_set_int },
463 { "set_vec3", Effect_set_vec3 },
464 { "set_vec4", Effect_set_vec4 },
468 const luaL_Reg OverlayEffect_funcs[] = {
469 { "new", OverlayEffect_new },
470 { "set_float", Effect_set_float },
471 { "set_int", Effect_set_int },
472 { "set_vec3", Effect_set_vec3 },
473 { "set_vec4", Effect_set_vec4 },
477 const luaL_Reg ResizeEffect_funcs[] = {
478 { "new", ResizeEffect_new },
479 { "set_float", Effect_set_float },
480 { "set_int", Effect_set_int },
481 { "set_vec3", Effect_set_vec3 },
482 { "set_vec4", Effect_set_vec4 },
486 const luaL_Reg MixEffect_funcs[] = {
487 { "new", MixEffect_new },
488 { "set_float", Effect_set_float },
489 { "set_int", Effect_set_int },
490 { "set_vec3", Effect_set_vec3 },
491 { "set_vec4", Effect_set_vec4 },
495 const luaL_Reg InputStateInfo_funcs[] = {
496 { "get_width", InputStateInfo_get_width },
497 { "get_height", InputStateInfo_get_height },
498 { "get_interlaced", InputStateInfo_get_interlaced },
499 { "get_frame_rate_nom", InputStateInfo_get_frame_rate_nom },
500 { "get_frame_rate_den", InputStateInfo_get_frame_rate_den },
506 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain, bool override_bounce, bool deinterlace)
508 deinterlace(deinterlace)
510 ImageFormat inout_format;
511 inout_format.color_space = COLORSPACE_sRGB;
513 // Gamma curve depends on the input signal, and we don't really get any
514 // indications. A camera would be expected to do Rec. 709, but
515 // I haven't checked if any do in practice. However, computers _do_ output
516 // in sRGB gamma (ie., they don't convert from sRGB to Rec. 709), and
517 // I wouldn't really be surprised if most non-professional cameras do, too.
518 // So we pick sRGB as the least evil here.
519 inout_format.gamma_curve = GAMMA_sRGB;
521 // The Blackmagic driver docs claim that the device outputs Y'CbCr
522 // according to Rec. 601, but practical testing indicates it definitely
523 // is Rec. 709 (at least up to errors attributable to rounding errors).
524 // Perhaps 601 was only to indicate the subsampling positions, not the
525 // colorspace itself? Tested with a Lenovo X1 gen 3 as input.
526 YCbCrFormat input_ycbcr_format;
527 input_ycbcr_format.chroma_subsampling_x = 2;
528 input_ycbcr_format.chroma_subsampling_y = 1;
529 input_ycbcr_format.cb_x_position = 0.0;
530 input_ycbcr_format.cr_x_position = 0.0;
531 input_ycbcr_format.cb_y_position = 0.5;
532 input_ycbcr_format.cr_y_position = 0.5;
533 input_ycbcr_format.luma_coefficients = YCBCR_REC_709;
534 input_ycbcr_format.full_range = false;
538 deinterlace_effect = new movit::DeinterlaceEffect();
540 // As per the comments in deinterlace_effect.h, we turn this off.
541 // The most likely interlaced input for us is either a camera
542 // (where it's fine to turn it off) or a laptop (where it _should_
544 CHECK(deinterlace_effect->set_int("enable_spatial_interlacing_check", 0));
546 num_inputs = deinterlace_effect->num_inputs();
547 assert(num_inputs == FRAME_HISTORY_LENGTH);
551 for (unsigned i = 0; i < num_inputs; ++i) {
552 if (override_bounce) {
553 inputs.push_back(new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR));
555 inputs.push_back(new YCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR));
557 chain->add_input(inputs.back());
561 vector<Effect *> reverse_inputs(inputs.rbegin(), inputs.rend());
562 chain->add_effect(deinterlace_effect, reverse_inputs);
566 void LiveInputWrapper::connect_signal(int signal_num)
568 if (global_mixer == nullptr) {
573 signal_num = theme->map_signal(signal_num);
575 BufferedFrame first_frame = theme->input_state->buffered_frames[signal_num][0];
576 if (first_frame.frame == nullptr) {
580 unsigned width, height;
582 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)first_frame.frame->userdata;
583 width = userdata->last_width[first_frame.field_number];
584 height = userdata->last_height[first_frame.field_number];
587 BufferedFrame last_good_frame = first_frame;
588 for (unsigned i = 0; i < inputs.size(); ++i) {
589 BufferedFrame frame = theme->input_state->buffered_frames[signal_num][i];
590 if (frame.frame == nullptr) {
591 // Not enough data; reuse last frame (well, field).
592 // This is suboptimal, but we have nothing better.
593 frame = last_good_frame;
595 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
597 if (userdata->last_width[frame.field_number] != width ||
598 userdata->last_height[frame.field_number] != height) {
599 // Resolution changed; reuse last frame/field.
600 frame = last_good_frame;
601 userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
604 inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
605 inputs[i]->set_texture_num(1, userdata->tex_cbcr[frame.field_number]);
606 inputs[i]->set_width(userdata->last_width[frame.field_number]);
607 inputs[i]->set_height(userdata->last_height[frame.field_number]);
609 last_good_frame = frame;
613 BufferedFrame frame = theme->input_state->buffered_frames[signal_num][0];
614 CHECK(deinterlace_effect->set_int("current_field_position", frame.field_number));
618 Theme::Theme(const char *filename, ResourcePool *resource_pool, unsigned num_cards)
619 : resource_pool(resource_pool), num_cards(num_cards)
624 register_class("EffectChain", EffectChain_funcs);
625 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
626 register_class("ImageInput", ImageInput_funcs);
627 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
628 register_class("ResampleEffect", ResampleEffect_funcs);
629 register_class("PaddingEffect", PaddingEffect_funcs);
630 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
631 register_class("OverlayEffect", OverlayEffect_funcs);
632 register_class("ResizeEffect", ResizeEffect_funcs);
633 register_class("MixEffect", MixEffect_funcs);
634 register_class("InputStateInfo", InputStateInfo_funcs);
638 if (luaL_dofile(L, filename)) {
639 fprintf(stderr, "error: %s\n", lua_tostring(L, -1));
643 assert(lua_gettop(L) == 0);
645 // Ask it for the number of channels.
646 lua_getglobal(L, "num_channels");
648 if (lua_pcall(L, 0, 1, 0) != 0) {
649 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
653 num_channels = luaL_checknumber(L, 1);
655 assert(lua_gettop(L) == 0);
658 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
660 assert(lua_gettop(L) == 0);
661 luaL_newmetatable(L, class_name); // mt = {}
662 lua_pushlightuserdata(L, this);
663 luaL_setfuncs(L, funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
664 lua_pushvalue(L, -1);
665 lua_setfield(L, -2, "__index"); // mt.__index = mt
666 lua_setglobal(L, class_name); // ClassName = mt
667 assert(lua_gettop(L) == 0);
670 Theme::Chain Theme::get_chain(unsigned num, float t, unsigned width, unsigned height, InputState input_state)
674 unique_lock<mutex> lock(m);
675 assert(lua_gettop(L) == 0);
676 lua_getglobal(L, "get_chain"); /* function to be called */
677 lua_pushnumber(L, num);
678 lua_pushnumber(L, t);
679 lua_pushnumber(L, width);
680 lua_pushnumber(L, height);
681 wrap_lua_object<InputStateInfo>(L, "InputStateInfo", input_state);
683 if (lua_pcall(L, 5, 2, 0) != 0) {
684 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
688 chain.chain = (EffectChain *)luaL_checkudata(L, -2, "EffectChain");
689 if (!lua_isfunction(L, -1)) {
690 fprintf(stderr, "Argument #-1 should be a function\n");
693 lua_pushvalue(L, -1);
694 shared_ptr<LuaRefWithDeleter> funcref(new LuaRefWithDeleter(&m, L, luaL_ref(L, LUA_REGISTRYINDEX)));
696 assert(lua_gettop(L) == 0);
698 chain.setup_chain = [this, funcref, input_state]{
699 unique_lock<mutex> lock(m);
701 this->input_state = &input_state;
703 // Set up state, including connecting signals.
704 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref->get());
705 if (lua_pcall(L, 0, 0, 0) != 0) {
706 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
709 assert(lua_gettop(L) == 0);
712 // TODO: Can we do better, e.g. by running setup_chain() and seeing what it references?
713 // Actually, setup_chain does maybe hold all the references we need now anyway?
714 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
715 for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
716 chain.input_frames.push_back(input_state.buffered_frames[card_index][frame_num].frame);
723 std::string Theme::get_channel_name(unsigned channel)
725 unique_lock<mutex> lock(m);
726 lua_getglobal(L, "channel_name");
727 lua_pushnumber(L, channel);
728 if (lua_pcall(L, 1, 1, 0) != 0) {
729 fprintf(stderr, "error running function `channel_name': %s\n", lua_tostring(L, -1));
733 std::string ret = lua_tostring(L, -1);
735 assert(lua_gettop(L) == 0);
739 bool Theme::get_supports_set_wb(unsigned channel)
741 unique_lock<mutex> lock(m);
742 lua_getglobal(L, "supports_set_wb");
743 lua_pushnumber(L, channel);
744 if (lua_pcall(L, 1, 1, 0) != 0) {
745 fprintf(stderr, "error running function `supports_set_wb': %s\n", lua_tostring(L, -1));
749 bool ret = checkbool(L, -1);
751 assert(lua_gettop(L) == 0);
755 void Theme::set_wb(unsigned channel, double r, double g, double b)
757 unique_lock<mutex> lock(m);
758 lua_getglobal(L, "set_wb");
759 lua_pushnumber(L, channel);
760 lua_pushnumber(L, r);
761 lua_pushnumber(L, g);
762 lua_pushnumber(L, b);
763 if (lua_pcall(L, 4, 0, 0) != 0) {
764 fprintf(stderr, "error running function `set_wb': %s\n", lua_tostring(L, -1));
768 assert(lua_gettop(L) == 0);
771 std::vector<std::string> Theme::get_transition_names(float t)
773 unique_lock<mutex> lock(m);
774 lua_getglobal(L, "get_transitions");
775 lua_pushnumber(L, t);
776 if (lua_pcall(L, 1, 1, 0) != 0) {
777 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
781 std::vector<std::string> ret;
783 while (lua_next(L, -2) != 0) {
784 ret.push_back(lua_tostring(L, -1));
788 assert(lua_gettop(L) == 0);
792 int Theme::map_signal(int signal_num)
794 if (signal_num >= int(num_cards)) {
795 if (signals_warned_about.insert(signal_num).second) {
796 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u card(s).\n", signal_num, num_cards);
797 fprintf(stderr, "Mapping to card %d instead.\n", signal_num % num_cards);
799 signal_num %= num_cards;
804 void Theme::transition_clicked(int transition_num, float t)
806 unique_lock<mutex> lock(m);
807 lua_getglobal(L, "transition_clicked");
808 lua_pushnumber(L, transition_num);
809 lua_pushnumber(L, t);
811 if (lua_pcall(L, 2, 0, 0) != 0) {
812 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
815 assert(lua_gettop(L) == 0);
818 void Theme::channel_clicked(int preview_num)
820 unique_lock<mutex> lock(m);
821 lua_getglobal(L, "channel_clicked");
822 lua_pushnumber(L, preview_num);
824 if (lua_pcall(L, 1, 0, 0) != 0) {
825 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
828 assert(lua_gettop(L) == 0);