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 if (lua_gettop(L) == 2) {
91 chain->add_effect(effect);
93 vector<Effect *> inputs;
94 for (int idx = 3; idx <= lua_gettop(L); ++idx) {
95 if (luaL_testudata(L, idx, "LiveInputWrapper")) {
96 LiveInputWrapper *input = (LiveInputWrapper *)lua_touserdata(L, idx);
97 inputs.push_back(input->get_input());
99 inputs.push_back(get_effect(L, idx));
102 chain->add_effect(effect, inputs);
105 lua_settop(L, 2); // Return the effect itself.
109 int EffectChain_finalize(lua_State* L)
111 assert(lua_gettop(L) == 2);
112 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
113 bool is_main_chain = checkbool(L, 2);
115 // Add outputs as needed.
116 ImageFormat inout_format;
117 inout_format.color_space = COLORSPACE_sRGB;
118 inout_format.gamma_curve = GAMMA_sRGB;
120 YCbCrFormat output_ycbcr_format;
121 output_ycbcr_format.chroma_subsampling_x = 1;
122 output_ycbcr_format.chroma_subsampling_y = 1;
123 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
124 output_ycbcr_format.full_range = false;
126 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR);
127 chain->set_dither_bits(8);
128 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
130 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
136 int LiveInputWrapper_connect_signal(lua_State* L)
138 assert(lua_gettop(L) == 2);
139 LiveInputWrapper *input = (LiveInputWrapper *)luaL_checkudata(L, 1, "LiveInputWrapper");
140 int signal_num = luaL_checknumber(L, 2);
141 input->connect_signal(signal_num);
145 int WhiteBalanceEffect_new(lua_State* L)
147 assert(lua_gettop(L) == 0);
148 return wrap_lua_object<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
151 int ResampleEffect_new(lua_State* L)
153 assert(lua_gettop(L) == 0);
154 return wrap_lua_object<ResampleEffect>(L, "ResampleEffect");
157 int PaddingEffect_new(lua_State* L)
159 assert(lua_gettop(L) == 0);
160 return wrap_lua_object<PaddingEffect>(L, "PaddingEffect");
163 int IntegralPaddingEffect_new(lua_State* L)
165 assert(lua_gettop(L) == 0);
166 return wrap_lua_object<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
169 int OverlayEffect_new(lua_State* L)
171 assert(lua_gettop(L) == 0);
172 return wrap_lua_object<OverlayEffect>(L, "OverlayEffect");
175 int Effect_set_float(lua_State *L)
177 assert(lua_gettop(L) == 3);
178 Effect *effect = (Effect *)get_effect(L, 1);
180 const char* cstr = lua_tolstring(L, 2, &len);
181 std::string key(cstr, len);
182 float value = luaL_checknumber(L, 3);
183 (void)effect->set_float(key, value);
187 int Effect_set_int(lua_State *L)
189 assert(lua_gettop(L) == 3);
190 Effect *effect = (Effect *)get_effect(L, 1);
192 const char* cstr = lua_tolstring(L, 2, &len);
193 std::string key(cstr, len);
194 float value = luaL_checknumber(L, 3);
195 (void)effect->set_int(key, value);
199 int Effect_set_vec4(lua_State *L)
201 assert(lua_gettop(L) == 6);
202 Effect *effect = (Effect *)get_effect(L, 1);
204 const char* cstr = lua_tolstring(L, 2, &len);
205 std::string key(cstr, len);
207 v[0] = luaL_checknumber(L, 3);
208 v[1] = luaL_checknumber(L, 4);
209 v[2] = luaL_checknumber(L, 5);
210 v[3] = luaL_checknumber(L, 6);
211 (void)effect->set_vec4(key, v);
215 const luaL_Reg EffectChain_funcs[] = {
216 { "new", EffectChain_new },
217 { "add_live_input", EffectChain_add_live_input },
218 { "add_effect", EffectChain_add_effect },
219 { "finalize", EffectChain_finalize },
223 const luaL_Reg LiveInputWrapper_funcs[] = {
224 { "connect_signal", LiveInputWrapper_connect_signal },
228 const luaL_Reg WhiteBalanceEffect_funcs[] = {
229 { "new", WhiteBalanceEffect_new },
230 { "set_float", Effect_set_float },
231 { "set_int", Effect_set_int },
232 { "set_vec4", Effect_set_vec4 },
236 const luaL_Reg ResampleEffect_funcs[] = {
237 { "new", ResampleEffect_new },
238 { "set_float", Effect_set_float },
239 { "set_int", Effect_set_int },
240 { "set_vec4", Effect_set_vec4 },
244 const luaL_Reg PaddingEffect_funcs[] = {
245 { "new", PaddingEffect_new },
246 { "set_float", Effect_set_float },
247 { "set_int", Effect_set_int },
248 { "set_vec4", Effect_set_vec4 },
252 const luaL_Reg IntegralPaddingEffect_funcs[] = {
253 { "new", IntegralPaddingEffect_new },
254 { "set_float", Effect_set_float },
255 { "set_int", Effect_set_int },
256 { "set_vec4", Effect_set_vec4 },
260 const luaL_Reg OverlayEffect_funcs[] = {
261 { "new", OverlayEffect_new },
262 { "set_float", Effect_set_float },
263 { "set_int", Effect_set_int },
264 { "set_vec4", Effect_set_vec4 },
270 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain)
273 ImageFormat inout_format;
274 inout_format.color_space = COLORSPACE_sRGB;
275 inout_format.gamma_curve = GAMMA_sRGB;
277 YCbCrFormat input_ycbcr_format;
278 input_ycbcr_format.chroma_subsampling_x = 2;
279 input_ycbcr_format.chroma_subsampling_y = 1;
280 input_ycbcr_format.cb_x_position = 0.0;
281 input_ycbcr_format.cr_x_position = 0.0;
282 input_ycbcr_format.cb_y_position = 0.5;
283 input_ycbcr_format.cr_y_position = 0.5;
284 input_ycbcr_format.luma_coefficients = YCBCR_REC_601;
285 input_ycbcr_format.full_range = false;
287 input = new YCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
288 chain->add_input(input);
291 void LiveInputWrapper::connect_signal(int signal_num)
293 theme->connect_signal(input, signal_num);
296 Theme::Theme(const char *filename, ResourcePool *resource_pool)
297 : resource_pool(resource_pool)
302 printf("constructing, this=%p\n", this);
304 register_class("EffectChain", EffectChain_funcs);
305 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
306 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
307 register_class("ResampleEffect", ResampleEffect_funcs);
308 register_class("PaddingEffect", PaddingEffect_funcs);
309 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
310 register_class("OverlayEffect", OverlayEffect_funcs);
314 if (luaL_dofile(L, filename)) {
315 fprintf(stderr, "error: %s\n", lua_tostring(L, -1));
319 assert(lua_gettop(L) == 0);
321 // Ask it for the number of channels.
322 lua_getglobal(L, "num_channels");
324 if (lua_pcall(L, 0, 1, 0) != 0) {
325 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
329 num_channels = luaL_checknumber(L, 1);
332 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
334 luaL_newmetatable(L, class_name);
335 lua_pushlightuserdata(L, this);
336 luaL_setfuncs(L, funcs, 1);
337 lua_pushvalue(L, -1);
338 lua_setfield(L, -2, "__index");
339 lua_setglobal(L, class_name);
342 pair<EffectChain *, function<void()>>
343 Theme::get_chain(unsigned num, float t, unsigned width, unsigned height)
345 unique_lock<mutex> lock(m);
346 lua_getglobal(L, "get_chain"); /* function to be called */
347 lua_pushnumber(L, num);
348 lua_pushnumber(L, t);
349 lua_pushnumber(L, width);
350 lua_pushnumber(L, height);
352 if (lua_pcall(L, 4, 2, 0) != 0) {
353 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
357 EffectChain *chain = (EffectChain *)luaL_checkudata(L, -2, "EffectChain");
358 if (!lua_isfunction(L, -1)) {
359 fprintf(stderr, "Argument #-1 should be a function\n");
362 lua_pushvalue(L, -1);
363 int funcref = luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak!
365 return make_pair(chain, [this, funcref]{
366 unique_lock<mutex> lock(m);
368 // Set up state, including connecting signals.
369 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref);
370 if (lua_pcall(L, 0, 0, 0) != 0) {
371 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
377 void Theme::connect_signal(YCbCrInput *input, int signal_num)
379 input->set_texture_num(0, input_textures[signal_num].tex_y);
380 input->set_texture_num(1, input_textures[signal_num].tex_cbcr);
383 void Theme::transition_clicked(int transition_num, float t)
385 unique_lock<mutex> lock(m);
386 lua_getglobal(L, "transition_clicked");
387 lua_pushnumber(L, transition_num);
388 lua_pushnumber(L, t);
390 if (lua_pcall(L, 2, 0, 0) != 0) {
391 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));