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.
107 // Make sure Lua doesn't garbage-collect it away.
108 lua_pushvalue(L, -1);
109 luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak?
114 int EffectChain_finalize(lua_State* L)
116 assert(lua_gettop(L) == 2);
117 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
118 bool is_main_chain = checkbool(L, 2);
120 // Add outputs as needed.
121 ImageFormat inout_format;
122 inout_format.color_space = COLORSPACE_sRGB;
123 inout_format.gamma_curve = GAMMA_sRGB;
125 YCbCrFormat output_ycbcr_format;
126 output_ycbcr_format.chroma_subsampling_x = 1;
127 output_ycbcr_format.chroma_subsampling_y = 1;
128 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
129 output_ycbcr_format.full_range = false;
131 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR);
132 chain->set_dither_bits(8);
133 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
135 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
141 int LiveInputWrapper_connect_signal(lua_State* L)
143 assert(lua_gettop(L) == 2);
144 LiveInputWrapper *input = (LiveInputWrapper *)luaL_checkudata(L, 1, "LiveInputWrapper");
145 int signal_num = luaL_checknumber(L, 2);
146 input->connect_signal(signal_num);
150 int WhiteBalanceEffect_new(lua_State* L)
152 assert(lua_gettop(L) == 0);
153 return wrap_lua_object<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
156 int ResampleEffect_new(lua_State* L)
158 assert(lua_gettop(L) == 0);
159 return wrap_lua_object<ResampleEffect>(L, "ResampleEffect");
162 int PaddingEffect_new(lua_State* L)
164 assert(lua_gettop(L) == 0);
165 return wrap_lua_object<PaddingEffect>(L, "PaddingEffect");
168 int IntegralPaddingEffect_new(lua_State* L)
170 assert(lua_gettop(L) == 0);
171 return wrap_lua_object<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
174 int OverlayEffect_new(lua_State* L)
176 assert(lua_gettop(L) == 0);
177 return wrap_lua_object<OverlayEffect>(L, "OverlayEffect");
180 int Effect_set_float(lua_State *L)
182 assert(lua_gettop(L) == 3);
183 Effect *effect = (Effect *)get_effect(L, 1);
185 const char* cstr = lua_tolstring(L, 2, &len);
186 std::string key(cstr, len);
187 float value = luaL_checknumber(L, 3);
188 (void)effect->set_float(key, value);
192 int Effect_set_int(lua_State *L)
194 assert(lua_gettop(L) == 3);
195 Effect *effect = (Effect *)get_effect(L, 1);
197 const char* cstr = lua_tolstring(L, 2, &len);
198 std::string key(cstr, len);
199 float value = luaL_checknumber(L, 3);
200 (void)effect->set_int(key, value);
204 int Effect_set_vec4(lua_State *L)
206 assert(lua_gettop(L) == 6);
207 Effect *effect = (Effect *)get_effect(L, 1);
209 const char* cstr = lua_tolstring(L, 2, &len);
210 std::string key(cstr, len);
212 v[0] = luaL_checknumber(L, 3);
213 v[1] = luaL_checknumber(L, 4);
214 v[2] = luaL_checknumber(L, 5);
215 v[3] = luaL_checknumber(L, 6);
216 (void)effect->set_vec4(key, v);
220 const luaL_Reg EffectChain_funcs[] = {
221 { "new", EffectChain_new },
222 { "add_live_input", EffectChain_add_live_input },
223 { "add_effect", EffectChain_add_effect },
224 { "finalize", EffectChain_finalize },
228 const luaL_Reg LiveInputWrapper_funcs[] = {
229 { "connect_signal", LiveInputWrapper_connect_signal },
233 const luaL_Reg WhiteBalanceEffect_funcs[] = {
234 { "new", WhiteBalanceEffect_new },
235 { "set_float", Effect_set_float },
236 { "set_int", Effect_set_int },
237 { "set_vec4", Effect_set_vec4 },
241 const luaL_Reg ResampleEffect_funcs[] = {
242 { "new", ResampleEffect_new },
243 { "set_float", Effect_set_float },
244 { "set_int", Effect_set_int },
245 { "set_vec4", Effect_set_vec4 },
249 const luaL_Reg PaddingEffect_funcs[] = {
250 { "new", PaddingEffect_new },
251 { "set_float", Effect_set_float },
252 { "set_int", Effect_set_int },
253 { "set_vec4", Effect_set_vec4 },
257 const luaL_Reg IntegralPaddingEffect_funcs[] = {
258 { "new", IntegralPaddingEffect_new },
259 { "set_float", Effect_set_float },
260 { "set_int", Effect_set_int },
261 { "set_vec4", Effect_set_vec4 },
265 const luaL_Reg OverlayEffect_funcs[] = {
266 { "new", OverlayEffect_new },
267 { "set_float", Effect_set_float },
268 { "set_int", Effect_set_int },
269 { "set_vec4", Effect_set_vec4 },
275 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain)
278 ImageFormat inout_format;
279 inout_format.color_space = COLORSPACE_sRGB;
280 inout_format.gamma_curve = GAMMA_sRGB;
282 YCbCrFormat input_ycbcr_format;
283 input_ycbcr_format.chroma_subsampling_x = 2;
284 input_ycbcr_format.chroma_subsampling_y = 1;
285 input_ycbcr_format.cb_x_position = 0.0;
286 input_ycbcr_format.cr_x_position = 0.0;
287 input_ycbcr_format.cb_y_position = 0.5;
288 input_ycbcr_format.cr_y_position = 0.5;
289 input_ycbcr_format.luma_coefficients = YCBCR_REC_601;
290 input_ycbcr_format.full_range = false;
292 input = new YCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
293 chain->add_input(input);
296 void LiveInputWrapper::connect_signal(int signal_num)
298 theme->connect_signal(input, signal_num);
301 Theme::Theme(const char *filename, ResourcePool *resource_pool)
302 : resource_pool(resource_pool)
307 printf("constructing, this=%p\n", this);
309 register_class("EffectChain", EffectChain_funcs);
310 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
311 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
312 register_class("ResampleEffect", ResampleEffect_funcs);
313 register_class("PaddingEffect", PaddingEffect_funcs);
314 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
315 register_class("OverlayEffect", OverlayEffect_funcs);
319 if (luaL_dofile(L, filename)) {
320 fprintf(stderr, "error: %s\n", lua_tostring(L, -1));
324 assert(lua_gettop(L) == 0);
326 // Ask it for the number of channels.
327 lua_getglobal(L, "num_channels");
329 if (lua_pcall(L, 0, 1, 0) != 0) {
330 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
334 num_channels = luaL_checknumber(L, 1);
337 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
339 luaL_newmetatable(L, class_name);
340 lua_pushlightuserdata(L, this);
341 luaL_setfuncs(L, funcs, 1);
342 lua_pushvalue(L, -1);
343 lua_setfield(L, -2, "__index");
344 lua_setglobal(L, class_name);
347 pair<EffectChain *, function<void()>>
348 Theme::get_chain(unsigned num, float t, unsigned width, unsigned height)
350 unique_lock<mutex> lock(m);
351 lua_getglobal(L, "get_chain"); /* function to be called */
352 lua_pushnumber(L, num);
353 lua_pushnumber(L, t);
354 lua_pushnumber(L, width);
355 lua_pushnumber(L, height);
357 if (lua_pcall(L, 4, 2, 0) != 0) {
358 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
362 EffectChain *chain = (EffectChain *)luaL_checkudata(L, -2, "EffectChain");
363 if (!lua_isfunction(L, -1)) {
364 fprintf(stderr, "Argument #-1 should be a function\n");
367 lua_pushvalue(L, -1);
368 int funcref = luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak!
370 return make_pair(chain, [this, funcref]{
371 unique_lock<mutex> lock(m);
373 // Set up state, including connecting signals.
374 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref);
375 if (lua_pcall(L, 0, 0, 0) != 0) {
376 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
382 void Theme::connect_signal(YCbCrInput *input, int signal_num)
384 input->set_texture_num(0, input_textures[signal_num].tex_y);
385 input->set_texture_num(1, input_textures[signal_num].tex_cbcr);
388 void Theme::transition_clicked(int transition_num, float t)
390 unique_lock<mutex> lock(m);
391 lua_getglobal(L, "transition_clicked");
392 lua_pushnumber(L, transition_num);
393 lua_pushnumber(L, t);
395 if (lua_pcall(L, 2, 0, 0) != 0) {
396 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));