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>
15 #define WIDTH 1280 // FIXME
16 #define HEIGHT 720 // FIXME
19 using namespace movit;
23 vector<LiveInputWrapper *> live_inputs;
25 template<class T, class... Args>
26 int wrap_lua_object(lua_State* L, const char *class_name, Args&&... args)
28 // Construct the C++ object and put it on the stack.
29 void *mem = lua_newuserdata(L, sizeof(T));
30 new(mem) T(std::forward<Args>(args)...);
32 // Look up the metatable named <class_name>, and set it on the new object.
33 luaL_getmetatable(L, class_name);
34 lua_setmetatable(L, -2);
39 Theme *get_theme_updata(lua_State* L)
41 luaL_checktype(L, lua_upvalueindex(1), LUA_TLIGHTUSERDATA);
42 return (Theme *)lua_touserdata(L, lua_upvalueindex(1));
45 Effect *get_effect(lua_State *L, int idx)
47 if (luaL_testudata(L, idx, "WhiteBalanceEffect") ||
48 luaL_testudata(L, idx, "ResampleEffect")) {
49 return (Effect *)lua_touserdata(L, idx);
51 fprintf(stderr, "Error: Index #%d was not an Effect type\n", idx);
55 bool checkbool(lua_State* L, int idx)
57 luaL_checktype(L, idx, LUA_TBOOLEAN);
58 return lua_toboolean(L, idx);
61 int EffectChain_new(lua_State* L)
63 assert(lua_gettop(L) == 2);
64 int aspect_w = luaL_checknumber(L, 1);
65 int aspect_h = luaL_checknumber(L, 2);
67 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h);
70 int EffectChain_add_live_input(lua_State* L)
72 assert(lua_gettop(L) == 1);
73 Theme *theme = get_theme_updata(L);
74 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
75 return wrap_lua_object<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain);
78 int EffectChain_add_effect(lua_State* L)
80 assert(lua_gettop(L) == 3);
81 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
83 // TODO: Better error reporting.
84 Effect *effect1 = get_effect(L, 2);
85 if (luaL_testudata(L, 3, "LiveInputWrapper")) {
86 LiveInputWrapper *effect2 = (LiveInputWrapper *)lua_touserdata(L, 3);
87 chain->add_effect(effect1, effect2->get_input());
89 Effect *effect2 = get_effect(L, 3);
90 chain->add_effect(effect1, effect2);
97 int EffectChain_finalize(lua_State* L)
99 assert(lua_gettop(L) == 2);
100 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
101 bool is_main_chain = checkbool(L, 2);
103 // Add outputs as needed.
104 ImageFormat inout_format;
105 inout_format.color_space = COLORSPACE_sRGB;
106 inout_format.gamma_curve = GAMMA_sRGB;
108 YCbCrFormat output_ycbcr_format;
109 output_ycbcr_format.chroma_subsampling_x = 1;
110 output_ycbcr_format.chroma_subsampling_y = 1;
111 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
112 output_ycbcr_format.full_range = false;
114 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR);
115 chain->set_dither_bits(8);
116 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
118 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
124 int LiveInputWrapper_connect_signal(lua_State* L)
126 assert(lua_gettop(L) == 2);
127 LiveInputWrapper *input = (LiveInputWrapper *)luaL_checkudata(L, 1, "LiveInputWrapper");
128 int signal_num = luaL_checknumber(L, 2);
129 input->connect_signal(signal_num);
133 int WhiteBalanceEffect_new(lua_State* L)
135 assert(lua_gettop(L) == 0);
136 return wrap_lua_object<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
139 int ResampleEffect_new(lua_State* L)
141 assert(lua_gettop(L) == 0);
142 return wrap_lua_object<ResampleEffect>(L, "ResampleEffect");
145 int Effect_set_float(lua_State *L)
147 assert(lua_gettop(L) == 3);
148 Effect *effect = (Effect *)get_effect(L, 1);
150 const char* cstr = lua_tolstring(L, 2, &len);
151 std::string key(cstr, len);
152 float value = luaL_checknumber(L, 3);
153 (void)effect->set_float(key, value);
157 int Effect_set_int(lua_State *L)
159 assert(lua_gettop(L) == 3);
160 Effect *effect = (Effect *)get_effect(L, 1);
162 const char* cstr = lua_tolstring(L, 2, &len);
163 std::string key(cstr, len);
164 float value = luaL_checknumber(L, 3);
165 (void)effect->set_int(key, value);
169 const luaL_Reg EffectChain_funcs[] = {
170 { "new", EffectChain_new },
171 { "add_live_input", EffectChain_add_live_input },
172 { "add_effect", EffectChain_add_effect },
173 { "finalize", EffectChain_finalize },
177 const luaL_Reg LiveInputWrapper_funcs[] = {
178 { "connect_signal", LiveInputWrapper_connect_signal },
182 const luaL_Reg WhiteBalanceEffect_funcs[] = {
183 { "new", WhiteBalanceEffect_new },
184 { "set_float", Effect_set_float },
185 { "set_int", Effect_set_int },
189 const luaL_Reg ResampleEffect_funcs[] = {
190 { "new", ResampleEffect_new },
191 { "set_float", Effect_set_float },
192 { "set_int", Effect_set_int },
198 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain)
201 ImageFormat inout_format;
202 inout_format.color_space = COLORSPACE_sRGB;
203 inout_format.gamma_curve = GAMMA_sRGB;
205 YCbCrFormat input_ycbcr_format;
206 input_ycbcr_format.chroma_subsampling_x = 2;
207 input_ycbcr_format.chroma_subsampling_y = 1;
208 input_ycbcr_format.cb_x_position = 0.0;
209 input_ycbcr_format.cr_x_position = 0.0;
210 input_ycbcr_format.cb_y_position = 0.5;
211 input_ycbcr_format.cr_y_position = 0.5;
212 input_ycbcr_format.luma_coefficients = YCBCR_REC_601;
213 input_ycbcr_format.full_range = false;
215 input = new YCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
216 chain->add_input(input);
219 void LiveInputWrapper::connect_signal(int signal_num)
221 theme->connect_signal(input, signal_num);
224 Theme::Theme(const char *filename, ResourcePool *resource_pool)
225 : resource_pool(resource_pool)
230 printf("constructing, this=%p\n", this);
232 register_class("EffectChain", EffectChain_funcs);
233 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
234 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
235 register_class("ResampleEffect", ResampleEffect_funcs);
239 if (luaL_dofile(L, filename)) {
240 fprintf(stderr, "error: %s\n", lua_tostring(L, -1));
244 assert(lua_gettop(L) == 0);
246 // Ask it for the number of channels.
247 lua_getglobal(L, "num_channels");
249 if (lua_pcall(L, 0, 1, 0) != 0) {
250 fprintf(stderr, "error running function `num_channels': %s", lua_tostring(L, -1));
254 num_channels = luaL_checknumber(L, 1);
257 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
259 luaL_newmetatable(L, class_name);
260 lua_pushlightuserdata(L, this);
261 luaL_setfuncs(L, funcs, 1);
262 lua_pushvalue(L, -1);
263 lua_setfield(L, -2, "__index");
264 lua_setglobal(L, class_name);
267 pair<EffectChain *, function<void()>>
268 Theme::get_chain(unsigned num, float t, unsigned width, unsigned height)
270 unique_lock<mutex> lock(m);
271 lua_getglobal(L, "get_chain"); /* function to be called */
272 lua_pushnumber(L, num);
273 lua_pushnumber(L, t);
274 lua_pushnumber(L, width);
275 lua_pushnumber(L, height);
277 if (lua_pcall(L, 4, 2, 0) != 0) {
278 fprintf(stderr, "error running function `get_chain': %s", lua_tostring(L, -1));
282 EffectChain *chain = (EffectChain *)luaL_checkudata(L, -2, "EffectChain");
283 if (!lua_isfunction(L, -1)) {
284 fprintf(stderr, "Argument #-1 should be a function\n");
287 lua_pushvalue(L, -1);
288 int funcref = luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak!
290 return make_pair(chain, [this, funcref]{
291 unique_lock<mutex> lock(m);
293 // Set up state, including connecting signals.
294 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref);
295 lua_pcall(L, 0, 0, 0);
299 void Theme::connect_signal(YCbCrInput *input, int signal_num)
301 input->set_texture_num(0, input_textures[signal_num].tex_y);
302 input->set_texture_num(1, input_textures[signal_num].tex_cbcr);
305 void Theme::transition_clicked(int transition_num, float t)
307 unique_lock<mutex> lock(m);
308 lua_getglobal(L, "transition_clicked");
309 lua_pushnumber(L, transition_num);
310 lua_pushnumber(L, t);
312 if (lua_pcall(L, 2, 0, 0) != 0) {
313 fprintf(stderr, "error running function `transition_clicked': %s", lua_tostring(L, -1));