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>
16 #define WIDTH 1280 // FIXME
17 #define HEIGHT 720 // FIXME
20 using namespace movit;
24 vector<LiveInputWrapper *> live_inputs;
26 template<class T, class... Args>
27 int wrap_lua_object(lua_State* L, const char *class_name, Args&&... args)
29 // Construct the C++ object and put it on the stack.
30 void *mem = lua_newuserdata(L, sizeof(T));
31 new(mem) T(std::forward<Args>(args)...);
33 // Look up the metatable named <class_name>, and set it on the new object.
34 luaL_getmetatable(L, class_name);
35 lua_setmetatable(L, -2);
40 Theme *get_theme_updata(lua_State* L)
42 luaL_checktype(L, lua_upvalueindex(1), LUA_TLIGHTUSERDATA);
43 return (Theme *)lua_touserdata(L, lua_upvalueindex(1));
46 Effect *get_effect(lua_State *L, int idx)
48 if (luaL_testudata(L, idx, "WhiteBalanceEffect") ||
49 luaL_testudata(L, idx, "ResampleEffect") ||
50 luaL_testudata(L, idx, "PaddingEffect") ||
51 luaL_testudata(L, idx, "IntegralPaddingEffect")) {
52 return (Effect *)lua_touserdata(L, idx);
54 fprintf(stderr, "Error: Index #%d was not an Effect type\n", idx);
58 bool checkbool(lua_State* L, int idx)
60 luaL_checktype(L, idx, LUA_TBOOLEAN);
61 return lua_toboolean(L, idx);
64 int EffectChain_new(lua_State* L)
66 assert(lua_gettop(L) == 2);
67 int aspect_w = luaL_checknumber(L, 1);
68 int aspect_h = luaL_checknumber(L, 2);
70 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h);
73 int EffectChain_add_live_input(lua_State* L)
75 assert(lua_gettop(L) == 1);
76 Theme *theme = get_theme_updata(L);
77 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
78 return wrap_lua_object<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain);
81 int EffectChain_add_effect(lua_State* L)
83 assert(lua_gettop(L) == 3);
84 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
86 // TODO: Better error reporting.
87 Effect *effect1 = get_effect(L, 2);
88 if (luaL_testudata(L, 3, "LiveInputWrapper")) {
89 LiveInputWrapper *effect2 = (LiveInputWrapper *)lua_touserdata(L, 3);
90 chain->add_effect(effect1, effect2->get_input());
92 Effect *effect2 = get_effect(L, 3);
93 chain->add_effect(effect1, effect2);
100 int EffectChain_finalize(lua_State* L)
102 assert(lua_gettop(L) == 2);
103 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
104 bool is_main_chain = checkbool(L, 2);
106 // Add outputs as needed.
107 ImageFormat inout_format;
108 inout_format.color_space = COLORSPACE_sRGB;
109 inout_format.gamma_curve = GAMMA_sRGB;
111 YCbCrFormat output_ycbcr_format;
112 output_ycbcr_format.chroma_subsampling_x = 1;
113 output_ycbcr_format.chroma_subsampling_y = 1;
114 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
115 output_ycbcr_format.full_range = false;
117 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR);
118 chain->set_dither_bits(8);
119 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
121 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
127 int LiveInputWrapper_connect_signal(lua_State* L)
129 assert(lua_gettop(L) == 2);
130 LiveInputWrapper *input = (LiveInputWrapper *)luaL_checkudata(L, 1, "LiveInputWrapper");
131 int signal_num = luaL_checknumber(L, 2);
132 input->connect_signal(signal_num);
136 int WhiteBalanceEffect_new(lua_State* L)
138 assert(lua_gettop(L) == 0);
139 return wrap_lua_object<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
142 int ResampleEffect_new(lua_State* L)
144 assert(lua_gettop(L) == 0);
145 return wrap_lua_object<ResampleEffect>(L, "ResampleEffect");
148 int PaddingEffect_new(lua_State* L)
150 assert(lua_gettop(L) == 0);
151 return wrap_lua_object<PaddingEffect>(L, "PaddingEffect");
154 int IntegralPaddingEffect_new(lua_State* L)
156 assert(lua_gettop(L) == 0);
157 return wrap_lua_object<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
160 int Effect_set_float(lua_State *L)
162 assert(lua_gettop(L) == 3);
163 Effect *effect = (Effect *)get_effect(L, 1);
165 const char* cstr = lua_tolstring(L, 2, &len);
166 std::string key(cstr, len);
167 float value = luaL_checknumber(L, 3);
168 (void)effect->set_float(key, value);
172 int Effect_set_int(lua_State *L)
174 assert(lua_gettop(L) == 3);
175 Effect *effect = (Effect *)get_effect(L, 1);
177 const char* cstr = lua_tolstring(L, 2, &len);
178 std::string key(cstr, len);
179 float value = luaL_checknumber(L, 3);
180 (void)effect->set_int(key, value);
184 const luaL_Reg EffectChain_funcs[] = {
185 { "new", EffectChain_new },
186 { "add_live_input", EffectChain_add_live_input },
187 { "add_effect", EffectChain_add_effect },
188 { "finalize", EffectChain_finalize },
192 const luaL_Reg LiveInputWrapper_funcs[] = {
193 { "connect_signal", LiveInputWrapper_connect_signal },
197 const luaL_Reg WhiteBalanceEffect_funcs[] = {
198 { "new", WhiteBalanceEffect_new },
199 { "set_float", Effect_set_float },
200 { "set_int", Effect_set_int },
204 const luaL_Reg ResampleEffect_funcs[] = {
205 { "new", ResampleEffect_new },
206 { "set_float", Effect_set_float },
207 { "set_int", Effect_set_int },
211 const luaL_Reg PaddingEffect_funcs[] = {
212 { "new", PaddingEffect_new },
213 { "set_float", Effect_set_float },
214 { "set_int", Effect_set_int },
218 const luaL_Reg IntegralPaddingEffect_funcs[] = {
219 { "new", IntegralPaddingEffect_new },
220 { "set_float", Effect_set_float },
221 { "set_int", Effect_set_int },
227 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain)
230 ImageFormat inout_format;
231 inout_format.color_space = COLORSPACE_sRGB;
232 inout_format.gamma_curve = GAMMA_sRGB;
234 YCbCrFormat input_ycbcr_format;
235 input_ycbcr_format.chroma_subsampling_x = 2;
236 input_ycbcr_format.chroma_subsampling_y = 1;
237 input_ycbcr_format.cb_x_position = 0.0;
238 input_ycbcr_format.cr_x_position = 0.0;
239 input_ycbcr_format.cb_y_position = 0.5;
240 input_ycbcr_format.cr_y_position = 0.5;
241 input_ycbcr_format.luma_coefficients = YCBCR_REC_601;
242 input_ycbcr_format.full_range = false;
244 input = new YCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
245 chain->add_input(input);
248 void LiveInputWrapper::connect_signal(int signal_num)
250 theme->connect_signal(input, signal_num);
253 Theme::Theme(const char *filename, ResourcePool *resource_pool)
254 : resource_pool(resource_pool)
259 printf("constructing, this=%p\n", this);
261 register_class("EffectChain", EffectChain_funcs);
262 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
263 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
264 register_class("ResampleEffect", ResampleEffect_funcs);
265 register_class("PaddingEffect", PaddingEffect_funcs);
266 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
270 if (luaL_dofile(L, filename)) {
271 fprintf(stderr, "error: %s\n", lua_tostring(L, -1));
275 assert(lua_gettop(L) == 0);
277 // Ask it for the number of channels.
278 lua_getglobal(L, "num_channels");
280 if (lua_pcall(L, 0, 1, 0) != 0) {
281 fprintf(stderr, "error running function `num_channels': %s", lua_tostring(L, -1));
285 num_channels = luaL_checknumber(L, 1);
288 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
290 luaL_newmetatable(L, class_name);
291 lua_pushlightuserdata(L, this);
292 luaL_setfuncs(L, funcs, 1);
293 lua_pushvalue(L, -1);
294 lua_setfield(L, -2, "__index");
295 lua_setglobal(L, class_name);
298 pair<EffectChain *, function<void()>>
299 Theme::get_chain(unsigned num, float t, unsigned width, unsigned height)
301 unique_lock<mutex> lock(m);
302 lua_getglobal(L, "get_chain"); /* function to be called */
303 lua_pushnumber(L, num);
304 lua_pushnumber(L, t);
305 lua_pushnumber(L, width);
306 lua_pushnumber(L, height);
308 if (lua_pcall(L, 4, 2, 0) != 0) {
309 fprintf(stderr, "error running function `get_chain': %s", lua_tostring(L, -1));
313 EffectChain *chain = (EffectChain *)luaL_checkudata(L, -2, "EffectChain");
314 if (!lua_isfunction(L, -1)) {
315 fprintf(stderr, "Argument #-1 should be a function\n");
318 lua_pushvalue(L, -1);
319 int funcref = luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak!
321 return make_pair(chain, [this, funcref]{
322 unique_lock<mutex> lock(m);
324 // Set up state, including connecting signals.
325 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref);
326 lua_pcall(L, 0, 0, 0);
330 void Theme::connect_signal(YCbCrInput *input, int signal_num)
332 input->set_texture_num(0, input_textures[signal_num].tex_y);
333 input->set_texture_num(1, input_textures[signal_num].tex_cbcr);
336 void Theme::transition_clicked(int transition_num, float t)
338 unique_lock<mutex> lock(m);
339 lua_getglobal(L, "transition_clicked");
340 lua_pushnumber(L, transition_num);
341 lua_pushnumber(L, t);
343 if (lua_pcall(L, 2, 0, 0) != 0) {
344 fprintf(stderr, "error running function `transition_clicked': %s", lua_tostring(L, -1));