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>
18 #define WIDTH 1280 // FIXME
19 #define HEIGHT 720 // FIXME
22 using namespace movit;
26 vector<LiveInputWrapper *> live_inputs;
28 template<class T, class... Args>
29 int wrap_lua_object(lua_State* L, const char *class_name, Args&&... args)
31 // Construct the C++ object and put it on the stack.
32 void *mem = lua_newuserdata(L, sizeof(T));
33 new(mem) T(std::forward<Args>(args)...);
35 // Look up the metatable named <class_name>, and set it on the new object.
36 luaL_getmetatable(L, class_name);
37 lua_setmetatable(L, -2);
42 Theme *get_theme_updata(lua_State* L)
44 luaL_checktype(L, lua_upvalueindex(1), LUA_TLIGHTUSERDATA);
45 return (Theme *)lua_touserdata(L, lua_upvalueindex(1));
48 Effect *get_effect(lua_State *L, int idx)
50 if (luaL_testudata(L, idx, "WhiteBalanceEffect") ||
51 luaL_testudata(L, idx, "ResampleEffect") ||
52 luaL_testudata(L, idx, "PaddingEffect") ||
53 luaL_testudata(L, idx, "IntegralPaddingEffect") ||
54 luaL_testudata(L, idx, "OverlayEffect") ||
55 luaL_testudata(L, idx, "ResizeEffect")) {
56 return (Effect *)lua_touserdata(L, idx);
58 fprintf(stderr, "Error: Index #%d was not an Effect type\n", idx);
62 bool checkbool(lua_State* L, int idx)
64 luaL_checktype(L, idx, LUA_TBOOLEAN);
65 return lua_toboolean(L, idx);
68 int EffectChain_new(lua_State* L)
70 assert(lua_gettop(L) == 2);
71 int aspect_w = luaL_checknumber(L, 1);
72 int aspect_h = luaL_checknumber(L, 2);
74 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h);
77 int EffectChain_add_live_input(lua_State* L)
79 assert(lua_gettop(L) == 1);
80 Theme *theme = get_theme_updata(L);
81 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
82 return wrap_lua_object<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain);
85 int EffectChain_add_effect(lua_State* L)
87 assert(lua_gettop(L) >= 2);
88 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
90 // TODO: Better error reporting.
91 Effect *effect = get_effect(L, 2);
92 if (lua_gettop(L) == 2) {
93 chain->add_effect(effect);
95 vector<Effect *> inputs;
96 for (int idx = 3; idx <= lua_gettop(L); ++idx) {
97 if (luaL_testudata(L, idx, "LiveInputWrapper")) {
98 LiveInputWrapper *input = (LiveInputWrapper *)lua_touserdata(L, idx);
99 inputs.push_back(input->get_input());
101 inputs.push_back(get_effect(L, idx));
104 chain->add_effect(effect, inputs);
107 lua_settop(L, 2); // Return the effect itself.
109 // Make sure Lua doesn't garbage-collect it away.
110 lua_pushvalue(L, -1);
111 luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak?
116 int EffectChain_finalize(lua_State* L)
118 assert(lua_gettop(L) == 2);
119 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
120 bool is_main_chain = checkbool(L, 2);
122 // Add outputs as needed.
123 ImageFormat inout_format;
124 inout_format.color_space = COLORSPACE_sRGB;
125 inout_format.gamma_curve = GAMMA_sRGB;
127 YCbCrFormat output_ycbcr_format;
128 output_ycbcr_format.chroma_subsampling_x = 1;
129 output_ycbcr_format.chroma_subsampling_y = 1;
130 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
131 output_ycbcr_format.full_range = false;
133 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR);
134 chain->set_dither_bits(8);
135 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
137 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
143 int LiveInputWrapper_connect_signal(lua_State* L)
145 assert(lua_gettop(L) == 2);
146 LiveInputWrapper *input = (LiveInputWrapper *)luaL_checkudata(L, 1, "LiveInputWrapper");
147 int signal_num = luaL_checknumber(L, 2);
148 input->connect_signal(signal_num);
152 int WhiteBalanceEffect_new(lua_State* L)
154 assert(lua_gettop(L) == 0);
155 return wrap_lua_object<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
158 int ResampleEffect_new(lua_State* L)
160 assert(lua_gettop(L) == 0);
161 return wrap_lua_object<ResampleEffect>(L, "ResampleEffect");
164 int PaddingEffect_new(lua_State* L)
166 assert(lua_gettop(L) == 0);
167 return wrap_lua_object<PaddingEffect>(L, "PaddingEffect");
170 int IntegralPaddingEffect_new(lua_State* L)
172 assert(lua_gettop(L) == 0);
173 return wrap_lua_object<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
176 int OverlayEffect_new(lua_State* L)
178 assert(lua_gettop(L) == 0);
179 return wrap_lua_object<OverlayEffect>(L, "OverlayEffect");
182 int ResizeEffect_new(lua_State* L)
184 assert(lua_gettop(L) == 0);
185 return wrap_lua_object<ResizeEffect>(L, "ResizeEffect");
188 int Effect_set_float(lua_State *L)
190 assert(lua_gettop(L) == 3);
191 Effect *effect = (Effect *)get_effect(L, 1);
193 const char* cstr = lua_tolstring(L, 2, &len);
194 std::string key(cstr, len);
195 float value = luaL_checknumber(L, 3);
196 (void)effect->set_float(key, value);
200 int Effect_set_int(lua_State *L)
202 assert(lua_gettop(L) == 3);
203 Effect *effect = (Effect *)get_effect(L, 1);
205 const char* cstr = lua_tolstring(L, 2, &len);
206 std::string key(cstr, len);
207 float value = luaL_checknumber(L, 3);
208 (void)effect->set_int(key, value);
212 int Effect_set_vec4(lua_State *L)
214 assert(lua_gettop(L) == 6);
215 Effect *effect = (Effect *)get_effect(L, 1);
217 const char* cstr = lua_tolstring(L, 2, &len);
218 std::string key(cstr, len);
220 v[0] = luaL_checknumber(L, 3);
221 v[1] = luaL_checknumber(L, 4);
222 v[2] = luaL_checknumber(L, 5);
223 v[3] = luaL_checknumber(L, 6);
224 (void)effect->set_vec4(key, v);
228 const luaL_Reg EffectChain_funcs[] = {
229 { "new", EffectChain_new },
230 { "add_live_input", EffectChain_add_live_input },
231 { "add_effect", EffectChain_add_effect },
232 { "finalize", EffectChain_finalize },
236 const luaL_Reg LiveInputWrapper_funcs[] = {
237 { "connect_signal", LiveInputWrapper_connect_signal },
241 const luaL_Reg WhiteBalanceEffect_funcs[] = {
242 { "new", WhiteBalanceEffect_new },
243 { "set_float", Effect_set_float },
244 { "set_int", Effect_set_int },
245 { "set_vec4", Effect_set_vec4 },
249 const luaL_Reg ResampleEffect_funcs[] = {
250 { "new", ResampleEffect_new },
251 { "set_float", Effect_set_float },
252 { "set_int", Effect_set_int },
253 { "set_vec4", Effect_set_vec4 },
257 const luaL_Reg PaddingEffect_funcs[] = {
258 { "new", PaddingEffect_new },
259 { "set_float", Effect_set_float },
260 { "set_int", Effect_set_int },
261 { "set_vec4", Effect_set_vec4 },
265 const luaL_Reg IntegralPaddingEffect_funcs[] = {
266 { "new", IntegralPaddingEffect_new },
267 { "set_float", Effect_set_float },
268 { "set_int", Effect_set_int },
269 { "set_vec4", Effect_set_vec4 },
273 const luaL_Reg OverlayEffect_funcs[] = {
274 { "new", OverlayEffect_new },
275 { "set_float", Effect_set_float },
276 { "set_int", Effect_set_int },
277 { "set_vec4", Effect_set_vec4 },
281 const luaL_Reg ResizeEffect_funcs[] = {
282 { "new", ResizeEffect_new },
283 { "set_float", Effect_set_float },
284 { "set_int", Effect_set_int },
285 { "set_vec4", Effect_set_vec4 },
291 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain)
294 ImageFormat inout_format;
295 inout_format.color_space = COLORSPACE_sRGB;
296 inout_format.gamma_curve = GAMMA_sRGB;
298 YCbCrFormat input_ycbcr_format;
299 input_ycbcr_format.chroma_subsampling_x = 2;
300 input_ycbcr_format.chroma_subsampling_y = 1;
301 input_ycbcr_format.cb_x_position = 0.0;
302 input_ycbcr_format.cr_x_position = 0.0;
303 input_ycbcr_format.cb_y_position = 0.5;
304 input_ycbcr_format.cr_y_position = 0.5;
305 input_ycbcr_format.luma_coefficients = YCBCR_REC_601;
306 input_ycbcr_format.full_range = false;
308 input = new YCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
309 chain->add_input(input);
312 void LiveInputWrapper::connect_signal(int signal_num)
314 theme->connect_signal(input, signal_num);
317 Theme::Theme(const char *filename, ResourcePool *resource_pool)
318 : resource_pool(resource_pool)
323 printf("constructing, this=%p\n", this);
325 register_class("EffectChain", EffectChain_funcs);
326 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
327 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
328 register_class("ResampleEffect", ResampleEffect_funcs);
329 register_class("PaddingEffect", PaddingEffect_funcs);
330 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
331 register_class("OverlayEffect", OverlayEffect_funcs);
332 register_class("ResizeEffect", ResizeEffect_funcs);
336 if (luaL_dofile(L, filename)) {
337 fprintf(stderr, "error: %s\n", lua_tostring(L, -1));
341 assert(lua_gettop(L) == 0);
343 // Ask it for the number of channels.
344 lua_getglobal(L, "num_channels");
346 if (lua_pcall(L, 0, 1, 0) != 0) {
347 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
351 num_channels = luaL_checknumber(L, 1);
354 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
356 luaL_newmetatable(L, class_name);
357 lua_pushlightuserdata(L, this);
358 luaL_setfuncs(L, funcs, 1);
359 lua_pushvalue(L, -1);
360 lua_setfield(L, -2, "__index");
361 lua_setglobal(L, class_name);
364 pair<EffectChain *, function<void()>>
365 Theme::get_chain(unsigned num, float t, unsigned width, unsigned height)
367 unique_lock<mutex> lock(m);
368 lua_getglobal(L, "get_chain"); /* function to be called */
369 lua_pushnumber(L, num);
370 lua_pushnumber(L, t);
371 lua_pushnumber(L, width);
372 lua_pushnumber(L, height);
374 if (lua_pcall(L, 4, 2, 0) != 0) {
375 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
379 EffectChain *chain = (EffectChain *)luaL_checkudata(L, -2, "EffectChain");
380 if (!lua_isfunction(L, -1)) {
381 fprintf(stderr, "Argument #-1 should be a function\n");
384 lua_pushvalue(L, -1);
385 int funcref = luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak!
387 return make_pair(chain, [this, funcref]{
388 unique_lock<mutex> lock(m);
390 // Set up state, including connecting signals.
391 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref);
392 if (lua_pcall(L, 0, 0, 0) != 0) {
393 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
399 void Theme::connect_signal(YCbCrInput *input, int signal_num)
401 input->set_texture_num(0, input_textures[signal_num].tex_y);
402 input->set_texture_num(1, input_textures[signal_num].tex_cbcr);
405 void Theme::transition_clicked(int transition_num, float t)
407 unique_lock<mutex> lock(m);
408 lua_getglobal(L, "transition_clicked");
409 lua_pushnumber(L, transition_num);
410 lua_pushnumber(L, t);
412 if (lua_pcall(L, 2, 0, 0) != 0) {
413 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
418 void Theme::channel_clicked(int preview_num)
420 unique_lock<mutex> lock(m);
421 lua_getglobal(L, "channel_clicked");
422 lua_pushnumber(L, preview_num);
424 if (lua_pcall(L, 1, 0, 0) != 0) {
425 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));