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>
17 #define WIDTH 1280 // FIXME
18 #define HEIGHT 720 // FIXME
21 using namespace movit;
25 vector<LiveInputWrapper *> live_inputs;
27 template<class T, class... Args>
28 int wrap_lua_object(lua_State* L, const char *class_name, Args&&... args)
30 // Construct the C++ object and put it on the stack.
31 void *mem = lua_newuserdata(L, sizeof(T));
32 new(mem) T(std::forward<Args>(args)...);
34 // Look up the metatable named <class_name>, and set it on the new object.
35 luaL_getmetatable(L, class_name);
36 lua_setmetatable(L, -2);
41 Theme *get_theme_updata(lua_State* L)
43 luaL_checktype(L, lua_upvalueindex(1), LUA_TLIGHTUSERDATA);
44 return (Theme *)lua_touserdata(L, lua_upvalueindex(1));
47 Effect *get_effect(lua_State *L, int idx)
49 if (luaL_testudata(L, idx, "WhiteBalanceEffect") ||
50 luaL_testudata(L, idx, "ResampleEffect") ||
51 luaL_testudata(L, idx, "PaddingEffect") ||
52 luaL_testudata(L, idx, "IntegralPaddingEffect") ||
53 luaL_testudata(L, idx, "OverlayEffect")) {
54 return (Effect *)lua_touserdata(L, idx);
56 fprintf(stderr, "Error: Index #%d was not an Effect type\n", idx);
60 bool checkbool(lua_State* L, int idx)
62 luaL_checktype(L, idx, LUA_TBOOLEAN);
63 return lua_toboolean(L, idx);
66 int EffectChain_new(lua_State* L)
68 assert(lua_gettop(L) == 2);
69 int aspect_w = luaL_checknumber(L, 1);
70 int aspect_h = luaL_checknumber(L, 2);
72 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h);
75 int EffectChain_add_live_input(lua_State* L)
77 assert(lua_gettop(L) == 1);
78 Theme *theme = get_theme_updata(L);
79 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
80 return wrap_lua_object<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain);
83 int EffectChain_add_effect(lua_State* L)
85 assert(lua_gettop(L) >= 2);
86 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
88 // TODO: Better error reporting.
89 Effect *effect = get_effect(L, 2);
90 vector<Effect *> inputs;
91 for (int idx = 3; idx <= lua_gettop(L); ++idx) {
92 if (luaL_testudata(L, idx, "LiveInputWrapper")) {
93 LiveInputWrapper *input = (LiveInputWrapper *)lua_touserdata(L, idx);
94 inputs.push_back(input->get_input());
96 inputs.push_back(get_effect(L, idx));
99 chain->add_effect(effect, inputs);
101 lua_settop(L, 2); // Return the effect itself.
105 int EffectChain_finalize(lua_State* L)
107 assert(lua_gettop(L) == 2);
108 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
109 bool is_main_chain = checkbool(L, 2);
111 // Add outputs as needed.
112 ImageFormat inout_format;
113 inout_format.color_space = COLORSPACE_sRGB;
114 inout_format.gamma_curve = GAMMA_sRGB;
116 YCbCrFormat output_ycbcr_format;
117 output_ycbcr_format.chroma_subsampling_x = 1;
118 output_ycbcr_format.chroma_subsampling_y = 1;
119 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
120 output_ycbcr_format.full_range = false;
122 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR);
123 chain->set_dither_bits(8);
124 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
126 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
132 int LiveInputWrapper_connect_signal(lua_State* L)
134 assert(lua_gettop(L) == 2);
135 LiveInputWrapper *input = (LiveInputWrapper *)luaL_checkudata(L, 1, "LiveInputWrapper");
136 int signal_num = luaL_checknumber(L, 2);
137 input->connect_signal(signal_num);
141 int WhiteBalanceEffect_new(lua_State* L)
143 assert(lua_gettop(L) == 0);
144 return wrap_lua_object<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
147 int ResampleEffect_new(lua_State* L)
149 assert(lua_gettop(L) == 0);
150 return wrap_lua_object<ResampleEffect>(L, "ResampleEffect");
153 int PaddingEffect_new(lua_State* L)
155 assert(lua_gettop(L) == 0);
156 return wrap_lua_object<PaddingEffect>(L, "PaddingEffect");
159 int IntegralPaddingEffect_new(lua_State* L)
161 assert(lua_gettop(L) == 0);
162 return wrap_lua_object<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
165 int OverlayEffect_new(lua_State* L)
167 assert(lua_gettop(L) == 0);
168 return wrap_lua_object<OverlayEffect>(L, "OverlayEffect");
171 int Effect_set_float(lua_State *L)
173 assert(lua_gettop(L) == 3);
174 Effect *effect = (Effect *)get_effect(L, 1);
176 const char* cstr = lua_tolstring(L, 2, &len);
177 std::string key(cstr, len);
178 float value = luaL_checknumber(L, 3);
179 (void)effect->set_float(key, value);
183 int Effect_set_int(lua_State *L)
185 assert(lua_gettop(L) == 3);
186 Effect *effect = (Effect *)get_effect(L, 1);
188 const char* cstr = lua_tolstring(L, 2, &len);
189 std::string key(cstr, len);
190 float value = luaL_checknumber(L, 3);
191 (void)effect->set_int(key, value);
195 const luaL_Reg EffectChain_funcs[] = {
196 { "new", EffectChain_new },
197 { "add_live_input", EffectChain_add_live_input },
198 { "add_effect", EffectChain_add_effect },
199 { "finalize", EffectChain_finalize },
203 const luaL_Reg LiveInputWrapper_funcs[] = {
204 { "connect_signal", LiveInputWrapper_connect_signal },
208 const luaL_Reg WhiteBalanceEffect_funcs[] = {
209 { "new", WhiteBalanceEffect_new },
210 { "set_float", Effect_set_float },
211 { "set_int", Effect_set_int },
215 const luaL_Reg ResampleEffect_funcs[] = {
216 { "new", ResampleEffect_new },
217 { "set_float", Effect_set_float },
218 { "set_int", Effect_set_int },
222 const luaL_Reg PaddingEffect_funcs[] = {
223 { "new", PaddingEffect_new },
224 { "set_float", Effect_set_float },
225 { "set_int", Effect_set_int },
229 const luaL_Reg IntegralPaddingEffect_funcs[] = {
230 { "new", IntegralPaddingEffect_new },
231 { "set_float", Effect_set_float },
232 { "set_int", Effect_set_int },
236 const luaL_Reg OverlayEffect_funcs[] = {
237 { "new", OverlayEffect_new },
238 { "set_float", Effect_set_float },
239 { "set_int", Effect_set_int },
245 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain)
248 ImageFormat inout_format;
249 inout_format.color_space = COLORSPACE_sRGB;
250 inout_format.gamma_curve = GAMMA_sRGB;
252 YCbCrFormat input_ycbcr_format;
253 input_ycbcr_format.chroma_subsampling_x = 2;
254 input_ycbcr_format.chroma_subsampling_y = 1;
255 input_ycbcr_format.cb_x_position = 0.0;
256 input_ycbcr_format.cr_x_position = 0.0;
257 input_ycbcr_format.cb_y_position = 0.5;
258 input_ycbcr_format.cr_y_position = 0.5;
259 input_ycbcr_format.luma_coefficients = YCBCR_REC_601;
260 input_ycbcr_format.full_range = false;
262 input = new YCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
263 chain->add_input(input);
266 void LiveInputWrapper::connect_signal(int signal_num)
268 theme->connect_signal(input, signal_num);
271 Theme::Theme(const char *filename, ResourcePool *resource_pool)
272 : resource_pool(resource_pool)
277 printf("constructing, this=%p\n", this);
279 register_class("EffectChain", EffectChain_funcs);
280 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
281 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
282 register_class("ResampleEffect", ResampleEffect_funcs);
283 register_class("PaddingEffect", PaddingEffect_funcs);
284 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
285 register_class("OverlayEffect", OverlayEffect_funcs);
289 if (luaL_dofile(L, filename)) {
290 fprintf(stderr, "error: %s\n", lua_tostring(L, -1));
294 assert(lua_gettop(L) == 0);
296 // Ask it for the number of channels.
297 lua_getglobal(L, "num_channels");
299 if (lua_pcall(L, 0, 1, 0) != 0) {
300 fprintf(stderr, "error running function `num_channels': %s", lua_tostring(L, -1));
304 num_channels = luaL_checknumber(L, 1);
307 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
309 luaL_newmetatable(L, class_name);
310 lua_pushlightuserdata(L, this);
311 luaL_setfuncs(L, funcs, 1);
312 lua_pushvalue(L, -1);
313 lua_setfield(L, -2, "__index");
314 lua_setglobal(L, class_name);
317 pair<EffectChain *, function<void()>>
318 Theme::get_chain(unsigned num, float t, unsigned width, unsigned height)
320 unique_lock<mutex> lock(m);
321 lua_getglobal(L, "get_chain"); /* function to be called */
322 lua_pushnumber(L, num);
323 lua_pushnumber(L, t);
324 lua_pushnumber(L, width);
325 lua_pushnumber(L, height);
327 if (lua_pcall(L, 4, 2, 0) != 0) {
328 fprintf(stderr, "error running function `get_chain': %s", lua_tostring(L, -1));
332 EffectChain *chain = (EffectChain *)luaL_checkudata(L, -2, "EffectChain");
333 if (!lua_isfunction(L, -1)) {
334 fprintf(stderr, "Argument #-1 should be a function\n");
337 lua_pushvalue(L, -1);
338 int funcref = luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak!
340 return make_pair(chain, [this, funcref]{
341 unique_lock<mutex> lock(m);
343 // Set up state, including connecting signals.
344 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref);
345 lua_pcall(L, 0, 0, 0);
349 void Theme::connect_signal(YCbCrInput *input, int signal_num)
351 input->set_texture_num(0, input_textures[signal_num].tex_y);
352 input->set_texture_num(1, input_textures[signal_num].tex_cbcr);
355 void Theme::transition_clicked(int transition_num, float t)
357 unique_lock<mutex> lock(m);
358 lua_getglobal(L, "transition_clicked");
359 lua_pushnumber(L, transition_num);
360 lua_pushnumber(L, t);
362 if (lua_pcall(L, 2, 0, 0) != 0) {
363 fprintf(stderr, "error running function `transition_clicked': %s", lua_tostring(L, -1));