8 #include <movit/effect_chain.h>
9 #include <movit/ycbcr_input.h>
10 #include <movit/white_balance_effect.h>
11 #include <movit/resample_effect.h>
12 #include <movit/padding_effect.h>
13 #include <movit/overlay_effect.h>
14 #include <movit/resize_effect.h>
15 #include <movit/mix_effect.h>
19 #define WIDTH 1280 // FIXME
20 #define HEIGHT 720 // FIXME
23 using namespace movit;
27 vector<LiveInputWrapper *> live_inputs;
29 template<class T, class... Args>
30 int wrap_lua_object(lua_State* L, const char *class_name, Args&&... args)
32 // Construct the C++ object and put it on the stack.
33 void *mem = lua_newuserdata(L, sizeof(T));
34 new(mem) T(std::forward<Args>(args)...);
36 // Look up the metatable named <class_name>, and set it on the new object.
37 luaL_getmetatable(L, class_name);
38 lua_setmetatable(L, -2);
43 Theme *get_theme_updata(lua_State* L)
45 luaL_checktype(L, lua_upvalueindex(1), LUA_TLIGHTUSERDATA);
46 return (Theme *)lua_touserdata(L, lua_upvalueindex(1));
49 Effect *get_effect(lua_State *L, int idx)
51 if (luaL_testudata(L, idx, "WhiteBalanceEffect") ||
52 luaL_testudata(L, idx, "ResampleEffect") ||
53 luaL_testudata(L, idx, "PaddingEffect") ||
54 luaL_testudata(L, idx, "IntegralPaddingEffect") ||
55 luaL_testudata(L, idx, "OverlayEffect") ||
56 luaL_testudata(L, idx, "ResizeEffect") ||
57 luaL_testudata(L, idx, "MixEffect")) {
58 return (Effect *)lua_touserdata(L, idx);
60 luaL_error(L, "Error: Index #%d was not an Effect type\n", idx);
64 bool checkbool(lua_State* L, int idx)
66 luaL_checktype(L, idx, LUA_TBOOLEAN);
67 return lua_toboolean(L, idx);
70 int EffectChain_new(lua_State* L)
72 assert(lua_gettop(L) == 2);
73 int aspect_w = luaL_checknumber(L, 1);
74 int aspect_h = luaL_checknumber(L, 2);
76 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h);
79 int EffectChain_add_live_input(lua_State* L)
81 assert(lua_gettop(L) == 2);
82 Theme *theme = get_theme_updata(L);
83 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
84 bool override_bounce = checkbool(L, 2);
85 return wrap_lua_object<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain, override_bounce);
88 int EffectChain_add_effect(lua_State* L)
90 assert(lua_gettop(L) >= 2);
91 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
93 // TODO: Better error reporting.
94 Effect *effect = get_effect(L, 2);
95 if (lua_gettop(L) == 2) {
96 chain->add_effect(effect);
98 vector<Effect *> inputs;
99 for (int idx = 3; idx <= lua_gettop(L); ++idx) {
100 if (luaL_testudata(L, idx, "LiveInputWrapper")) {
101 LiveInputWrapper *input = (LiveInputWrapper *)lua_touserdata(L, idx);
102 inputs.push_back(input->get_input());
104 inputs.push_back(get_effect(L, idx));
107 chain->add_effect(effect, inputs);
110 lua_settop(L, 2); // Return the effect itself.
112 // Make sure Lua doesn't garbage-collect it away.
113 lua_pushvalue(L, -1);
114 luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak?
119 int EffectChain_finalize(lua_State* L)
121 assert(lua_gettop(L) == 2);
122 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
123 bool is_main_chain = checkbool(L, 2);
125 // Add outputs as needed.
126 // NOTE: If you change any details about the output format, you will need to
127 // also update what's given to the muxer (HTTPD::Mux constructor) and
128 // what's put in the H.264 stream (sps_rbsp()).
129 ImageFormat inout_format;
130 inout_format.color_space = COLORSPACE_REC_709;
131 inout_format.gamma_curve = GAMMA_REC_709;
133 YCbCrFormat output_ycbcr_format;
134 // We actually output 4:2:0 in the end, but chroma subsampling
135 // happens in a pass not run by Movit (see Mixer::subsample_chroma()).
136 output_ycbcr_format.chroma_subsampling_x = 1;
137 output_ycbcr_format.chroma_subsampling_y = 1;
138 output_ycbcr_format.luma_coefficients = YCBCR_REC_709;
139 output_ycbcr_format.full_range = true;
140 output_ycbcr_format.num_levels = 256;
142 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR);
143 chain->set_dither_bits(8);
144 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
146 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
152 int LiveInputWrapper_connect_signal(lua_State* L)
154 assert(lua_gettop(L) == 2);
155 LiveInputWrapper *input = (LiveInputWrapper *)luaL_checkudata(L, 1, "LiveInputWrapper");
156 int signal_num = luaL_checknumber(L, 2);
157 input->connect_signal(signal_num);
161 int WhiteBalanceEffect_new(lua_State* L)
163 assert(lua_gettop(L) == 0);
164 return wrap_lua_object<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
167 int ResampleEffect_new(lua_State* L)
169 assert(lua_gettop(L) == 0);
170 return wrap_lua_object<ResampleEffect>(L, "ResampleEffect");
173 int PaddingEffect_new(lua_State* L)
175 assert(lua_gettop(L) == 0);
176 return wrap_lua_object<PaddingEffect>(L, "PaddingEffect");
179 int IntegralPaddingEffect_new(lua_State* L)
181 assert(lua_gettop(L) == 0);
182 return wrap_lua_object<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
185 int OverlayEffect_new(lua_State* L)
187 assert(lua_gettop(L) == 0);
188 return wrap_lua_object<OverlayEffect>(L, "OverlayEffect");
191 int ResizeEffect_new(lua_State* L)
193 assert(lua_gettop(L) == 0);
194 return wrap_lua_object<ResizeEffect>(L, "ResizeEffect");
197 int MixEffect_new(lua_State* L)
199 assert(lua_gettop(L) == 0);
200 return wrap_lua_object<MixEffect>(L, "MixEffect");
203 int Effect_set_float(lua_State *L)
205 assert(lua_gettop(L) == 3);
206 Effect *effect = (Effect *)get_effect(L, 1);
208 const char* cstr = lua_tolstring(L, 2, &len);
209 std::string key(cstr, len);
210 float value = luaL_checknumber(L, 3);
211 if (!effect->set_float(key, value)) {
212 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", cstr, int(value));
217 int Effect_set_int(lua_State *L)
219 assert(lua_gettop(L) == 3);
220 Effect *effect = (Effect *)get_effect(L, 1);
222 const char* cstr = lua_tolstring(L, 2, &len);
223 std::string key(cstr, len);
224 float value = luaL_checknumber(L, 3);
225 if (!effect->set_int(key, value)) {
226 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", cstr, int(value));
231 int Effect_set_vec4(lua_State *L)
233 assert(lua_gettop(L) == 6);
234 Effect *effect = (Effect *)get_effect(L, 1);
236 const char* cstr = lua_tolstring(L, 2, &len);
237 std::string key(cstr, len);
239 v[0] = luaL_checknumber(L, 3);
240 v[1] = luaL_checknumber(L, 4);
241 v[2] = luaL_checknumber(L, 5);
242 v[3] = luaL_checknumber(L, 6);
243 if (!effect->set_vec4(key, v)) {
244 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", cstr,
245 v[0], v[1], v[2], v[3]);
250 const luaL_Reg EffectChain_funcs[] = {
251 { "new", EffectChain_new },
252 { "add_live_input", EffectChain_add_live_input },
253 { "add_effect", EffectChain_add_effect },
254 { "finalize", EffectChain_finalize },
258 const luaL_Reg LiveInputWrapper_funcs[] = {
259 { "connect_signal", LiveInputWrapper_connect_signal },
263 const luaL_Reg WhiteBalanceEffect_funcs[] = {
264 { "new", WhiteBalanceEffect_new },
265 { "set_float", Effect_set_float },
266 { "set_int", Effect_set_int },
267 { "set_vec4", Effect_set_vec4 },
271 const luaL_Reg ResampleEffect_funcs[] = {
272 { "new", ResampleEffect_new },
273 { "set_float", Effect_set_float },
274 { "set_int", Effect_set_int },
275 { "set_vec4", Effect_set_vec4 },
279 const luaL_Reg PaddingEffect_funcs[] = {
280 { "new", PaddingEffect_new },
281 { "set_float", Effect_set_float },
282 { "set_int", Effect_set_int },
283 { "set_vec4", Effect_set_vec4 },
287 const luaL_Reg IntegralPaddingEffect_funcs[] = {
288 { "new", IntegralPaddingEffect_new },
289 { "set_float", Effect_set_float },
290 { "set_int", Effect_set_int },
291 { "set_vec4", Effect_set_vec4 },
295 const luaL_Reg OverlayEffect_funcs[] = {
296 { "new", OverlayEffect_new },
297 { "set_float", Effect_set_float },
298 { "set_int", Effect_set_int },
299 { "set_vec4", Effect_set_vec4 },
303 const luaL_Reg ResizeEffect_funcs[] = {
304 { "new", ResizeEffect_new },
305 { "set_float", Effect_set_float },
306 { "set_int", Effect_set_int },
307 { "set_vec4", Effect_set_vec4 },
311 const luaL_Reg MixEffect_funcs[] = {
312 { "new", MixEffect_new },
313 { "set_float", Effect_set_float },
314 { "set_int", Effect_set_int },
315 { "set_vec4", Effect_set_vec4 },
321 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain, bool override_bounce)
324 ImageFormat inout_format;
325 inout_format.color_space = COLORSPACE_sRGB;
326 inout_format.gamma_curve = GAMMA_sRGB;
328 // The Blackmagic driver docs claim that the device outputs Y'CbCr
329 // according to Rec. 601, but practical testing indicates it definitely
330 // is Rec. 709 (at least up to errors attributable to rounding errors).
331 // Perhaps 601 was only to indicate the subsampling positions, not the
332 // colorspace itself? Tested with a Lenovo X1 gen 3 as input.
333 YCbCrFormat input_ycbcr_format;
334 input_ycbcr_format.chroma_subsampling_x = 2;
335 input_ycbcr_format.chroma_subsampling_y = 1;
336 input_ycbcr_format.cb_x_position = 0.0;
337 input_ycbcr_format.cr_x_position = 0.0;
338 input_ycbcr_format.cb_y_position = 0.5;
339 input_ycbcr_format.cr_y_position = 0.5;
340 input_ycbcr_format.luma_coefficients = YCBCR_REC_709;
341 input_ycbcr_format.full_range = false;
343 if (override_bounce) {
344 input = new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
346 input = new YCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
348 chain->add_input(input);
351 void LiveInputWrapper::connect_signal(int signal_num)
353 theme->connect_signal(input, signal_num);
356 Theme::Theme(const char *filename, ResourcePool *resource_pool)
357 : resource_pool(resource_pool)
362 register_class("EffectChain", EffectChain_funcs);
363 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
364 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
365 register_class("ResampleEffect", ResampleEffect_funcs);
366 register_class("PaddingEffect", PaddingEffect_funcs);
367 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
368 register_class("OverlayEffect", OverlayEffect_funcs);
369 register_class("ResizeEffect", ResizeEffect_funcs);
370 register_class("MixEffect", MixEffect_funcs);
374 if (luaL_dofile(L, filename)) {
375 fprintf(stderr, "error: %s\n", lua_tostring(L, -1));
379 assert(lua_gettop(L) == 0);
381 // Ask it for the number of channels.
382 lua_getglobal(L, "num_channels");
384 if (lua_pcall(L, 0, 1, 0) != 0) {
385 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
389 num_channels = luaL_checknumber(L, 1);
391 assert(lua_gettop(L) == 0);
394 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
396 assert(lua_gettop(L) == 0);
397 luaL_newmetatable(L, class_name);
398 lua_pushlightuserdata(L, this);
399 luaL_setfuncs(L, funcs, 1);
400 lua_pushvalue(L, -1);
401 lua_setfield(L, -2, "__index");
402 lua_setglobal(L, class_name);
403 assert(lua_gettop(L) == 0);
406 pair<EffectChain *, function<void()>>
407 Theme::get_chain(unsigned num, float t, unsigned width, unsigned height)
409 unique_lock<mutex> lock(m);
410 assert(lua_gettop(L) == 0);
411 lua_getglobal(L, "get_chain"); /* function to be called */
412 lua_pushnumber(L, num);
413 lua_pushnumber(L, t);
414 lua_pushnumber(L, width);
415 lua_pushnumber(L, height);
417 if (lua_pcall(L, 4, 2, 0) != 0) {
418 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
422 EffectChain *chain = (EffectChain *)luaL_checkudata(L, -2, "EffectChain");
423 if (!lua_isfunction(L, -1)) {
424 fprintf(stderr, "Argument #-1 should be a function\n");
427 lua_pushvalue(L, -1);
428 int funcref = luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak!
430 assert(lua_gettop(L) == 0);
431 return make_pair(chain, [this, funcref]{
432 unique_lock<mutex> lock(m);
434 // Set up state, including connecting signals.
435 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref);
436 if (lua_pcall(L, 0, 0, 0) != 0) {
437 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
440 assert(lua_gettop(L) == 0);
444 std::vector<std::string> Theme::get_transition_names(float t)
446 unique_lock<mutex> lock(m);
447 lua_getglobal(L, "get_transitions");
448 lua_pushnumber(L, t);
449 if (lua_pcall(L, 1, 1, 0) != 0) {
450 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
454 std::vector<std::string> ret;
456 while (lua_next(L, -2) != 0) {
457 ret.push_back(lua_tostring(L, -1));
461 assert(lua_gettop(L) == 0);
465 void Theme::connect_signal(YCbCrInput *input, int signal_num)
467 input->set_texture_num(0, input_textures[signal_num].tex_y);
468 input->set_texture_num(1, input_textures[signal_num].tex_cbcr);
471 void Theme::transition_clicked(int transition_num, float t)
473 unique_lock<mutex> lock(m);
474 lua_getglobal(L, "transition_clicked");
475 lua_pushnumber(L, transition_num);
476 lua_pushnumber(L, t);
478 if (lua_pcall(L, 2, 0, 0) != 0) {
479 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
482 assert(lua_gettop(L) == 0);
485 void Theme::channel_clicked(int preview_num)
487 unique_lock<mutex> lock(m);
488 lua_getglobal(L, "channel_clicked");
489 lua_pushnumber(L, preview_num);
491 if (lua_pcall(L, 1, 0, 0) != 0) {
492 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
495 assert(lua_gettop(L) == 0);