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/white_balance_effect.h>
16 #include <movit/ycbcr.h>
17 #include <movit/ycbcr_input.h>
28 #define WIDTH 1280 // FIXME
29 #define HEIGHT 720 // FIXME
32 using namespace movit;
36 vector<LiveInputWrapper *> live_inputs;
38 template<class T, class... Args>
39 int wrap_lua_object(lua_State* L, const char *class_name, Args&&... args)
41 // Construct the C++ object and put it on the stack.
42 void *mem = lua_newuserdata(L, sizeof(T));
43 new(mem) T(std::forward<Args>(args)...);
45 // Look up the metatable named <class_name>, and set it on the new object.
46 luaL_getmetatable(L, class_name);
47 lua_setmetatable(L, -2);
52 Theme *get_theme_updata(lua_State* L)
54 luaL_checktype(L, lua_upvalueindex(1), LUA_TLIGHTUSERDATA);
55 return (Theme *)lua_touserdata(L, lua_upvalueindex(1));
58 Effect *get_effect(lua_State *L, int idx)
60 if (luaL_testudata(L, idx, "WhiteBalanceEffect") ||
61 luaL_testudata(L, idx, "ResampleEffect") ||
62 luaL_testudata(L, idx, "PaddingEffect") ||
63 luaL_testudata(L, idx, "IntegralPaddingEffect") ||
64 luaL_testudata(L, idx, "OverlayEffect") ||
65 luaL_testudata(L, idx, "ResizeEffect") ||
66 luaL_testudata(L, idx, "MixEffect")) {
67 return (Effect *)lua_touserdata(L, idx);
69 luaL_error(L, "Error: Index #%d was not an Effect type\n", idx);
73 bool checkbool(lua_State* L, int idx)
75 luaL_checktype(L, idx, LUA_TBOOLEAN);
76 return lua_toboolean(L, idx);
79 int EffectChain_new(lua_State* L)
81 assert(lua_gettop(L) == 2);
82 int aspect_w = luaL_checknumber(L, 1);
83 int aspect_h = luaL_checknumber(L, 2);
85 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h);
88 int EffectChain_add_live_input(lua_State* L)
90 assert(lua_gettop(L) == 2);
91 Theme *theme = get_theme_updata(L);
92 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
93 bool override_bounce = checkbool(L, 2);
94 return wrap_lua_object<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain, override_bounce);
97 int EffectChain_add_effect(lua_State* L)
99 assert(lua_gettop(L) >= 2);
100 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
102 // TODO: Better error reporting.
103 Effect *effect = get_effect(L, 2);
104 if (lua_gettop(L) == 2) {
105 chain->add_effect(effect);
107 vector<Effect *> inputs;
108 for (int idx = 3; idx <= lua_gettop(L); ++idx) {
109 if (luaL_testudata(L, idx, "LiveInputWrapper")) {
110 LiveInputWrapper *input = (LiveInputWrapper *)lua_touserdata(L, idx);
111 inputs.push_back(input->get_input());
113 inputs.push_back(get_effect(L, idx));
116 chain->add_effect(effect, inputs);
119 lua_settop(L, 2); // Return the effect itself.
121 // Make sure Lua doesn't garbage-collect it away.
122 lua_pushvalue(L, -1);
123 luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak?
128 int EffectChain_finalize(lua_State* L)
130 assert(lua_gettop(L) == 2);
131 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
132 bool is_main_chain = checkbool(L, 2);
134 // Add outputs as needed.
135 // NOTE: If you change any details about the output format, you will need to
136 // also update what's given to the muxer (HTTPD::Mux constructor) and
137 // what's put in the H.264 stream (sps_rbsp()).
138 ImageFormat inout_format;
139 inout_format.color_space = COLORSPACE_REC_709;
141 // Output gamma is tricky. We should output Rec. 709 for TV, except that
142 // we expect to run with web players and others that don't really care and
143 // just output with no conversion. So that means we'll need to output sRGB,
144 // even though H.264 has no setting for that (we use “unspecified”).
145 inout_format.gamma_curve = GAMMA_sRGB;
148 YCbCrFormat output_ycbcr_format;
149 // We actually output 4:2:0 in the end, but chroma subsampling
150 // happens in a pass not run by Movit (see Mixer::subsample_chroma()).
151 output_ycbcr_format.chroma_subsampling_x = 1;
152 output_ycbcr_format.chroma_subsampling_y = 1;
154 // Rec. 709 would be the sane thing to do, but it seems many players
155 // (e.g. MPlayer and VLC) just default to BT.601 coefficients no matter
156 // what (see discussions in e.g. https://trac.ffmpeg.org/ticket/4978).
157 // We _do_ set the right flags, though, so that a player that works
158 // properly doesn't have to guess.
159 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
160 output_ycbcr_format.full_range = false;
161 output_ycbcr_format.num_levels = 256;
163 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR);
164 chain->set_dither_bits(8);
165 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
167 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
173 int LiveInputWrapper_connect_signal(lua_State* L)
175 assert(lua_gettop(L) == 2);
176 LiveInputWrapper *input = (LiveInputWrapper *)luaL_checkudata(L, 1, "LiveInputWrapper");
177 int signal_num = luaL_checknumber(L, 2);
178 input->connect_signal(signal_num);
182 int WhiteBalanceEffect_new(lua_State* L)
184 assert(lua_gettop(L) == 0);
185 return wrap_lua_object<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
188 int ResampleEffect_new(lua_State* L)
190 assert(lua_gettop(L) == 0);
191 return wrap_lua_object<ResampleEffect>(L, "ResampleEffect");
194 int PaddingEffect_new(lua_State* L)
196 assert(lua_gettop(L) == 0);
197 return wrap_lua_object<PaddingEffect>(L, "PaddingEffect");
200 int IntegralPaddingEffect_new(lua_State* L)
202 assert(lua_gettop(L) == 0);
203 return wrap_lua_object<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
206 int OverlayEffect_new(lua_State* L)
208 assert(lua_gettop(L) == 0);
209 return wrap_lua_object<OverlayEffect>(L, "OverlayEffect");
212 int ResizeEffect_new(lua_State* L)
214 assert(lua_gettop(L) == 0);
215 return wrap_lua_object<ResizeEffect>(L, "ResizeEffect");
218 int MixEffect_new(lua_State* L)
220 assert(lua_gettop(L) == 0);
221 return wrap_lua_object<MixEffect>(L, "MixEffect");
224 int Effect_set_float(lua_State *L)
226 assert(lua_gettop(L) == 3);
227 Effect *effect = (Effect *)get_effect(L, 1);
229 const char* cstr = lua_tolstring(L, 2, &len);
230 std::string key(cstr, len);
231 float value = luaL_checknumber(L, 3);
232 if (!effect->set_float(key, value)) {
233 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", cstr, int(value));
238 int Effect_set_int(lua_State *L)
240 assert(lua_gettop(L) == 3);
241 Effect *effect = (Effect *)get_effect(L, 1);
243 const char* cstr = lua_tolstring(L, 2, &len);
244 std::string key(cstr, len);
245 float value = luaL_checknumber(L, 3);
246 if (!effect->set_int(key, value)) {
247 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", cstr, int(value));
252 int Effect_set_vec3(lua_State *L)
254 assert(lua_gettop(L) == 5);
255 Effect *effect = (Effect *)get_effect(L, 1);
257 const char* cstr = lua_tolstring(L, 2, &len);
258 std::string key(cstr, len);
260 v[0] = luaL_checknumber(L, 3);
261 v[1] = luaL_checknumber(L, 4);
262 v[2] = luaL_checknumber(L, 5);
263 if (!effect->set_vec3(key, v)) {
264 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", cstr,
270 int Effect_set_vec4(lua_State *L)
272 assert(lua_gettop(L) == 6);
273 Effect *effect = (Effect *)get_effect(L, 1);
275 const char* cstr = lua_tolstring(L, 2, &len);
276 std::string key(cstr, len);
278 v[0] = luaL_checknumber(L, 3);
279 v[1] = luaL_checknumber(L, 4);
280 v[2] = luaL_checknumber(L, 5);
281 v[3] = luaL_checknumber(L, 6);
282 if (!effect->set_vec4(key, v)) {
283 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", cstr,
284 v[0], v[1], v[2], v[3]);
289 const luaL_Reg EffectChain_funcs[] = {
290 { "new", EffectChain_new },
291 { "add_live_input", EffectChain_add_live_input },
292 { "add_effect", EffectChain_add_effect },
293 { "finalize", EffectChain_finalize },
297 const luaL_Reg LiveInputWrapper_funcs[] = {
298 { "connect_signal", LiveInputWrapper_connect_signal },
302 const luaL_Reg WhiteBalanceEffect_funcs[] = {
303 { "new", WhiteBalanceEffect_new },
304 { "set_float", Effect_set_float },
305 { "set_int", Effect_set_int },
306 { "set_vec3", Effect_set_vec3 },
307 { "set_vec4", Effect_set_vec4 },
311 const luaL_Reg ResampleEffect_funcs[] = {
312 { "new", ResampleEffect_new },
313 { "set_float", Effect_set_float },
314 { "set_int", Effect_set_int },
315 { "set_vec3", Effect_set_vec3 },
316 { "set_vec4", Effect_set_vec4 },
320 const luaL_Reg PaddingEffect_funcs[] = {
321 { "new", PaddingEffect_new },
322 { "set_float", Effect_set_float },
323 { "set_int", Effect_set_int },
324 { "set_vec3", Effect_set_vec3 },
325 { "set_vec4", Effect_set_vec4 },
329 const luaL_Reg IntegralPaddingEffect_funcs[] = {
330 { "new", IntegralPaddingEffect_new },
331 { "set_float", Effect_set_float },
332 { "set_int", Effect_set_int },
333 { "set_vec3", Effect_set_vec3 },
334 { "set_vec4", Effect_set_vec4 },
338 const luaL_Reg OverlayEffect_funcs[] = {
339 { "new", OverlayEffect_new },
340 { "set_float", Effect_set_float },
341 { "set_int", Effect_set_int },
342 { "set_vec3", Effect_set_vec3 },
343 { "set_vec4", Effect_set_vec4 },
347 const luaL_Reg ResizeEffect_funcs[] = {
348 { "new", ResizeEffect_new },
349 { "set_float", Effect_set_float },
350 { "set_int", Effect_set_int },
351 { "set_vec3", Effect_set_vec3 },
352 { "set_vec4", Effect_set_vec4 },
356 const luaL_Reg MixEffect_funcs[] = {
357 { "new", MixEffect_new },
358 { "set_float", Effect_set_float },
359 { "set_int", Effect_set_int },
360 { "set_vec3", Effect_set_vec3 },
361 { "set_vec4", Effect_set_vec4 },
367 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain, bool override_bounce)
370 ImageFormat inout_format;
371 inout_format.color_space = COLORSPACE_sRGB;
373 // Gamma curve depends on the input signal, and we don't really get any
374 // indications. A camera would be expected to do Rec. 709, but
375 // I haven't checked if any do in practice. However, computers _do_ output
376 // in sRGB gamma (ie., they don't convert from sRGB to Rec. 709), and
377 // I wouldn't really be surprised if most non-professional cameras do, too.
378 // So we pick sRGB as the least evil here.
379 inout_format.gamma_curve = GAMMA_sRGB;
381 // The Blackmagic driver docs claim that the device outputs Y'CbCr
382 // according to Rec. 601, but practical testing indicates it definitely
383 // is Rec. 709 (at least up to errors attributable to rounding errors).
384 // Perhaps 601 was only to indicate the subsampling positions, not the
385 // colorspace itself? Tested with a Lenovo X1 gen 3 as input.
386 YCbCrFormat input_ycbcr_format;
387 input_ycbcr_format.chroma_subsampling_x = 2;
388 input_ycbcr_format.chroma_subsampling_y = 1;
389 input_ycbcr_format.cb_x_position = 0.0;
390 input_ycbcr_format.cr_x_position = 0.0;
391 input_ycbcr_format.cb_y_position = 0.5;
392 input_ycbcr_format.cr_y_position = 0.5;
393 input_ycbcr_format.luma_coefficients = YCBCR_REC_709;
394 input_ycbcr_format.full_range = false;
396 if (override_bounce) {
397 input = new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
399 input = new YCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
401 chain->add_input(input);
404 void LiveInputWrapper::connect_signal(int signal_num)
406 theme->connect_signal(input, signal_num);
409 Theme::Theme(const char *filename, ResourcePool *resource_pool, unsigned num_cards)
410 : resource_pool(resource_pool), num_cards(num_cards)
415 register_class("EffectChain", EffectChain_funcs);
416 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
417 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
418 register_class("ResampleEffect", ResampleEffect_funcs);
419 register_class("PaddingEffect", PaddingEffect_funcs);
420 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
421 register_class("OverlayEffect", OverlayEffect_funcs);
422 register_class("ResizeEffect", ResizeEffect_funcs);
423 register_class("MixEffect", MixEffect_funcs);
427 if (luaL_dofile(L, filename)) {
428 fprintf(stderr, "error: %s\n", lua_tostring(L, -1));
432 assert(lua_gettop(L) == 0);
434 // Ask it for the number of channels.
435 lua_getglobal(L, "num_channels");
437 if (lua_pcall(L, 0, 1, 0) != 0) {
438 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
442 num_channels = luaL_checknumber(L, 1);
444 assert(lua_gettop(L) == 0);
447 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
449 assert(lua_gettop(L) == 0);
450 luaL_newmetatable(L, class_name);
451 lua_pushlightuserdata(L, this);
452 luaL_setfuncs(L, funcs, 1);
453 lua_pushvalue(L, -1);
454 lua_setfield(L, -2, "__index");
455 lua_setglobal(L, class_name);
456 assert(lua_gettop(L) == 0);
459 pair<EffectChain *, function<void()>>
460 Theme::get_chain(unsigned num, float t, unsigned width, unsigned height)
462 unique_lock<mutex> lock(m);
463 assert(lua_gettop(L) == 0);
464 lua_getglobal(L, "get_chain"); /* function to be called */
465 lua_pushnumber(L, num);
466 lua_pushnumber(L, t);
467 lua_pushnumber(L, width);
468 lua_pushnumber(L, height);
470 if (lua_pcall(L, 4, 2, 0) != 0) {
471 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
475 EffectChain *chain = (EffectChain *)luaL_checkudata(L, -2, "EffectChain");
476 if (!lua_isfunction(L, -1)) {
477 fprintf(stderr, "Argument #-1 should be a function\n");
480 lua_pushvalue(L, -1);
481 int funcref = luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak!
483 assert(lua_gettop(L) == 0);
484 return make_pair(chain, [this, funcref]{
485 unique_lock<mutex> lock(m);
487 // Set up state, including connecting signals.
488 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref);
489 if (lua_pcall(L, 0, 0, 0) != 0) {
490 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
493 assert(lua_gettop(L) == 0);
497 std::string Theme::get_channel_name(unsigned channel)
499 unique_lock<mutex> lock(m);
500 lua_getglobal(L, "channel_name");
501 lua_pushnumber(L, channel);
502 if (lua_pcall(L, 1, 1, 0) != 0) {
503 fprintf(stderr, "error running function `channel_nam': %s\n", lua_tostring(L, -1));
507 std::string ret = lua_tostring(L, -1);
509 assert(lua_gettop(L) == 0);
513 bool Theme::get_supports_set_wb(unsigned channel)
515 unique_lock<mutex> lock(m);
516 lua_getglobal(L, "supports_set_wb");
517 lua_pushnumber(L, channel);
518 if (lua_pcall(L, 1, 1, 0) != 0) {
519 fprintf(stderr, "error running function `supports_set_wb': %s\n", lua_tostring(L, -1));
523 bool ret = checkbool(L, -1);
525 assert(lua_gettop(L) == 0);
529 void Theme::set_wb(unsigned channel, double r, double g, double b)
531 unique_lock<mutex> lock(m);
532 lua_getglobal(L, "set_wb");
533 lua_pushnumber(L, channel);
534 lua_pushnumber(L, r);
535 lua_pushnumber(L, g);
536 lua_pushnumber(L, b);
537 if (lua_pcall(L, 4, 0, 0) != 0) {
538 fprintf(stderr, "error running function `set_wb': %s\n", lua_tostring(L, -1));
542 assert(lua_gettop(L) == 0);
545 std::vector<std::string> Theme::get_transition_names(float t)
547 unique_lock<mutex> lock(m);
548 lua_getglobal(L, "get_transitions");
549 lua_pushnumber(L, t);
550 if (lua_pcall(L, 1, 1, 0) != 0) {
551 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
555 std::vector<std::string> ret;
557 while (lua_next(L, -2) != 0) {
558 ret.push_back(lua_tostring(L, -1));
562 assert(lua_gettop(L) == 0);
566 void Theme::connect_signal(YCbCrInput *input, int signal_num)
568 if (signal_num >= int(num_cards)) {
569 if (signals_warned_about.insert(signal_num).second) {
570 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u card(s).\n", signal_num, num_cards);
571 fprintf(stderr, "Mapping to card %d instead.\n", signal_num % num_cards);
573 signal_num %= num_cards;
575 input->set_texture_num(0, input_textures[signal_num].tex_y);
576 input->set_texture_num(1, input_textures[signal_num].tex_cbcr);
579 void Theme::transition_clicked(int transition_num, float t)
581 unique_lock<mutex> lock(m);
582 lua_getglobal(L, "transition_clicked");
583 lua_pushnumber(L, transition_num);
584 lua_pushnumber(L, t);
586 if (lua_pcall(L, 2, 0, 0) != 0) {
587 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
590 assert(lua_gettop(L) == 0);
593 void Theme::channel_clicked(int preview_num)
595 unique_lock<mutex> lock(m);
596 lua_getglobal(L, "channel_clicked");
597 lua_pushnumber(L, preview_num);
599 if (lua_pcall(L, 1, 0, 0) != 0) {
600 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
603 assert(lua_gettop(L) == 0);