7 #include <movit/effect.h>
8 #include <movit/effect_chain.h>
9 #include <movit/image_format.h>
10 #include <movit/mix_effect.h>
11 #include <movit/overlay_effect.h>
12 #include <movit/padding_effect.h>
13 #include <movit/resample_effect.h>
14 #include <movit/resize_effect.h>
15 #include <movit/white_balance_effect.h>
16 #include <movit/ycbcr.h>
17 #include <movit/ycbcr_input.h>
28 #define WIDTH 1280 // FIXME
29 #define HEIGHT 720 // FIXME
32 using namespace movit;
36 vector<LiveInputWrapper *> live_inputs;
38 template<class T, class... Args>
39 int wrap_lua_object(lua_State* L, const char *class_name, Args&&... args)
41 // Construct the C++ object and put it on the stack.
42 void *mem = lua_newuserdata(L, sizeof(T));
43 new(mem) T(std::forward<Args>(args)...);
45 // Look up the metatable named <class_name>, and set it on the new object.
46 luaL_getmetatable(L, class_name);
47 lua_setmetatable(L, -2);
52 Theme *get_theme_updata(lua_State* L)
54 luaL_checktype(L, lua_upvalueindex(1), LUA_TLIGHTUSERDATA);
55 return (Theme *)lua_touserdata(L, lua_upvalueindex(1));
58 Effect *get_effect(lua_State *L, int idx)
60 if (luaL_testudata(L, idx, "WhiteBalanceEffect") ||
61 luaL_testudata(L, idx, "ResampleEffect") ||
62 luaL_testudata(L, idx, "PaddingEffect") ||
63 luaL_testudata(L, idx, "IntegralPaddingEffect") ||
64 luaL_testudata(L, idx, "OverlayEffect") ||
65 luaL_testudata(L, idx, "ResizeEffect") ||
66 luaL_testudata(L, idx, "MixEffect")) {
67 return (Effect *)lua_touserdata(L, idx);
69 luaL_error(L, "Error: Index #%d was not an Effect type\n", idx);
73 bool checkbool(lua_State* L, int idx)
75 luaL_checktype(L, idx, LUA_TBOOLEAN);
76 return lua_toboolean(L, idx);
79 int EffectChain_new(lua_State* L)
81 assert(lua_gettop(L) == 2);
82 int aspect_w = luaL_checknumber(L, 1);
83 int aspect_h = luaL_checknumber(L, 2);
85 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h);
88 int EffectChain_add_live_input(lua_State* L)
90 assert(lua_gettop(L) == 2);
91 Theme *theme = get_theme_updata(L);
92 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
93 bool override_bounce = checkbool(L, 2);
94 return wrap_lua_object<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain, override_bounce);
97 int EffectChain_add_effect(lua_State* L)
99 assert(lua_gettop(L) >= 2);
100 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
102 // TODO: Better error reporting.
103 Effect *effect = get_effect(L, 2);
104 if (lua_gettop(L) == 2) {
105 chain->add_effect(effect);
107 vector<Effect *> inputs;
108 for (int idx = 3; idx <= lua_gettop(L); ++idx) {
109 if (luaL_testudata(L, idx, "LiveInputWrapper")) {
110 LiveInputWrapper *input = (LiveInputWrapper *)lua_touserdata(L, idx);
111 inputs.push_back(input->get_input());
113 inputs.push_back(get_effect(L, idx));
116 chain->add_effect(effect, inputs);
119 lua_settop(L, 2); // Return the effect itself.
121 // Make sure Lua doesn't garbage-collect it away.
122 lua_pushvalue(L, -1);
123 luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak?
128 int EffectChain_finalize(lua_State* L)
130 assert(lua_gettop(L) == 2);
131 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
132 bool is_main_chain = checkbool(L, 2);
134 // Add outputs as needed.
135 // NOTE: If you change any details about the output format, you will need to
136 // also update what's given to the muxer (HTTPD::Mux constructor) and
137 // what's put in the H.264 stream (sps_rbsp()).
138 ImageFormat inout_format;
139 inout_format.color_space = COLORSPACE_REC_709;
141 // Output gamma is tricky. We should output Rec. 709 for TV, except that
142 // we expect to run with web players and others that don't really care and
143 // just output with no conversion. So that means we'll need to output sRGB,
144 // even though H.264 has no setting for that (we use “unspecified”).
145 inout_format.gamma_curve = GAMMA_sRGB;
148 YCbCrFormat output_ycbcr_format;
149 // We actually output 4:2:0 in the end, but chroma subsampling
150 // happens in a pass not run by Movit (see Mixer::subsample_chroma()).
151 output_ycbcr_format.chroma_subsampling_x = 1;
152 output_ycbcr_format.chroma_subsampling_y = 1;
154 // Rec. 709 would be the sane thing to do, but it seems many players
155 // (e.g. MPlayer and VLC) just default to BT.601 coefficients no matter
156 // what (see discussions in e.g. https://trac.ffmpeg.org/ticket/4978).
157 // We _do_ set the right flags, though, so that a player that works
158 // properly doesn't have to guess.
159 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
160 output_ycbcr_format.full_range = false;
161 output_ycbcr_format.num_levels = 256;
163 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR);
164 chain->set_dither_bits(8);
165 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
167 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
173 int LiveInputWrapper_connect_signal(lua_State* L)
175 assert(lua_gettop(L) == 2);
176 LiveInputWrapper *input = (LiveInputWrapper *)luaL_checkudata(L, 1, "LiveInputWrapper");
177 int signal_num = luaL_checknumber(L, 2);
178 input->connect_signal(signal_num);
182 int WhiteBalanceEffect_new(lua_State* L)
184 assert(lua_gettop(L) == 0);
185 return wrap_lua_object<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
188 int ResampleEffect_new(lua_State* L)
190 assert(lua_gettop(L) == 0);
191 return wrap_lua_object<ResampleEffect>(L, "ResampleEffect");
194 int PaddingEffect_new(lua_State* L)
196 assert(lua_gettop(L) == 0);
197 return wrap_lua_object<PaddingEffect>(L, "PaddingEffect");
200 int IntegralPaddingEffect_new(lua_State* L)
202 assert(lua_gettop(L) == 0);
203 return wrap_lua_object<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
206 int OverlayEffect_new(lua_State* L)
208 assert(lua_gettop(L) == 0);
209 return wrap_lua_object<OverlayEffect>(L, "OverlayEffect");
212 int ResizeEffect_new(lua_State* L)
214 assert(lua_gettop(L) == 0);
215 return wrap_lua_object<ResizeEffect>(L, "ResizeEffect");
218 int MixEffect_new(lua_State* L)
220 assert(lua_gettop(L) == 0);
221 return wrap_lua_object<MixEffect>(L, "MixEffect");
224 int Effect_set_float(lua_State *L)
226 assert(lua_gettop(L) == 3);
227 Effect *effect = (Effect *)get_effect(L, 1);
229 const char* cstr = lua_tolstring(L, 2, &len);
230 std::string key(cstr, len);
231 float value = luaL_checknumber(L, 3);
232 if (!effect->set_float(key, value)) {
233 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", cstr, int(value));
238 int Effect_set_int(lua_State *L)
240 assert(lua_gettop(L) == 3);
241 Effect *effect = (Effect *)get_effect(L, 1);
243 const char* cstr = lua_tolstring(L, 2, &len);
244 std::string key(cstr, len);
245 float value = luaL_checknumber(L, 3);
246 if (!effect->set_int(key, value)) {
247 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", cstr, int(value));
252 int Effect_set_vec4(lua_State *L)
254 assert(lua_gettop(L) == 6);
255 Effect *effect = (Effect *)get_effect(L, 1);
257 const char* cstr = lua_tolstring(L, 2, &len);
258 std::string key(cstr, len);
260 v[0] = luaL_checknumber(L, 3);
261 v[1] = luaL_checknumber(L, 4);
262 v[2] = luaL_checknumber(L, 5);
263 v[3] = luaL_checknumber(L, 6);
264 if (!effect->set_vec4(key, v)) {
265 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", cstr,
266 v[0], v[1], v[2], v[3]);
271 const luaL_Reg EffectChain_funcs[] = {
272 { "new", EffectChain_new },
273 { "add_live_input", EffectChain_add_live_input },
274 { "add_effect", EffectChain_add_effect },
275 { "finalize", EffectChain_finalize },
279 const luaL_Reg LiveInputWrapper_funcs[] = {
280 { "connect_signal", LiveInputWrapper_connect_signal },
284 const luaL_Reg WhiteBalanceEffect_funcs[] = {
285 { "new", WhiteBalanceEffect_new },
286 { "set_float", Effect_set_float },
287 { "set_int", Effect_set_int },
288 { "set_vec4", Effect_set_vec4 },
292 const luaL_Reg ResampleEffect_funcs[] = {
293 { "new", ResampleEffect_new },
294 { "set_float", Effect_set_float },
295 { "set_int", Effect_set_int },
296 { "set_vec4", Effect_set_vec4 },
300 const luaL_Reg PaddingEffect_funcs[] = {
301 { "new", PaddingEffect_new },
302 { "set_float", Effect_set_float },
303 { "set_int", Effect_set_int },
304 { "set_vec4", Effect_set_vec4 },
308 const luaL_Reg IntegralPaddingEffect_funcs[] = {
309 { "new", IntegralPaddingEffect_new },
310 { "set_float", Effect_set_float },
311 { "set_int", Effect_set_int },
312 { "set_vec4", Effect_set_vec4 },
316 const luaL_Reg OverlayEffect_funcs[] = {
317 { "new", OverlayEffect_new },
318 { "set_float", Effect_set_float },
319 { "set_int", Effect_set_int },
320 { "set_vec4", Effect_set_vec4 },
324 const luaL_Reg ResizeEffect_funcs[] = {
325 { "new", ResizeEffect_new },
326 { "set_float", Effect_set_float },
327 { "set_int", Effect_set_int },
328 { "set_vec4", Effect_set_vec4 },
332 const luaL_Reg MixEffect_funcs[] = {
333 { "new", MixEffect_new },
334 { "set_float", Effect_set_float },
335 { "set_int", Effect_set_int },
336 { "set_vec4", Effect_set_vec4 },
342 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain, bool override_bounce)
345 ImageFormat inout_format;
346 inout_format.color_space = COLORSPACE_sRGB;
348 // Gamma curve depends on the input signal, and we don't really get any
349 // indications. A camera would be expected to do Rec. 709, but
350 // I haven't checked if any do in practice. However, computers _do_ output
351 // in sRGB gamma (ie., they don't convert from sRGB to Rec. 709), and
352 // I wouldn't really be surprised if most non-professional cameras do, too.
353 // So we pick sRGB as the least evil here.
354 inout_format.gamma_curve = GAMMA_sRGB;
356 // The Blackmagic driver docs claim that the device outputs Y'CbCr
357 // according to Rec. 601, but practical testing indicates it definitely
358 // is Rec. 709 (at least up to errors attributable to rounding errors).
359 // Perhaps 601 was only to indicate the subsampling positions, not the
360 // colorspace itself? Tested with a Lenovo X1 gen 3 as input.
361 YCbCrFormat input_ycbcr_format;
362 input_ycbcr_format.chroma_subsampling_x = 2;
363 input_ycbcr_format.chroma_subsampling_y = 1;
364 input_ycbcr_format.cb_x_position = 0.0;
365 input_ycbcr_format.cr_x_position = 0.0;
366 input_ycbcr_format.cb_y_position = 0.5;
367 input_ycbcr_format.cr_y_position = 0.5;
368 input_ycbcr_format.luma_coefficients = YCBCR_REC_709;
369 input_ycbcr_format.full_range = false;
371 if (override_bounce) {
372 input = new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
374 input = new YCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
376 chain->add_input(input);
379 void LiveInputWrapper::connect_signal(int signal_num)
381 theme->connect_signal(input, signal_num);
384 Theme::Theme(const char *filename, ResourcePool *resource_pool, unsigned num_cards)
385 : resource_pool(resource_pool), num_cards(num_cards)
390 register_class("EffectChain", EffectChain_funcs);
391 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
392 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
393 register_class("ResampleEffect", ResampleEffect_funcs);
394 register_class("PaddingEffect", PaddingEffect_funcs);
395 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
396 register_class("OverlayEffect", OverlayEffect_funcs);
397 register_class("ResizeEffect", ResizeEffect_funcs);
398 register_class("MixEffect", MixEffect_funcs);
402 if (luaL_dofile(L, filename)) {
403 fprintf(stderr, "error: %s\n", lua_tostring(L, -1));
407 assert(lua_gettop(L) == 0);
409 // Ask it for the number of channels.
410 lua_getglobal(L, "num_channels");
412 if (lua_pcall(L, 0, 1, 0) != 0) {
413 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
417 num_channels = luaL_checknumber(L, 1);
419 assert(lua_gettop(L) == 0);
422 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
424 assert(lua_gettop(L) == 0);
425 luaL_newmetatable(L, class_name);
426 lua_pushlightuserdata(L, this);
427 luaL_setfuncs(L, funcs, 1);
428 lua_pushvalue(L, -1);
429 lua_setfield(L, -2, "__index");
430 lua_setglobal(L, class_name);
431 assert(lua_gettop(L) == 0);
434 pair<EffectChain *, function<void()>>
435 Theme::get_chain(unsigned num, float t, unsigned width, unsigned height)
437 unique_lock<mutex> lock(m);
438 assert(lua_gettop(L) == 0);
439 lua_getglobal(L, "get_chain"); /* function to be called */
440 lua_pushnumber(L, num);
441 lua_pushnumber(L, t);
442 lua_pushnumber(L, width);
443 lua_pushnumber(L, height);
445 if (lua_pcall(L, 4, 2, 0) != 0) {
446 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
450 EffectChain *chain = (EffectChain *)luaL_checkudata(L, -2, "EffectChain");
451 if (!lua_isfunction(L, -1)) {
452 fprintf(stderr, "Argument #-1 should be a function\n");
455 lua_pushvalue(L, -1);
456 int funcref = luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak!
458 assert(lua_gettop(L) == 0);
459 return make_pair(chain, [this, funcref]{
460 unique_lock<mutex> lock(m);
462 // Set up state, including connecting signals.
463 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref);
464 if (lua_pcall(L, 0, 0, 0) != 0) {
465 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
468 assert(lua_gettop(L) == 0);
472 std::vector<std::string> Theme::get_transition_names(float t)
474 unique_lock<mutex> lock(m);
475 lua_getglobal(L, "get_transitions");
476 lua_pushnumber(L, t);
477 if (lua_pcall(L, 1, 1, 0) != 0) {
478 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
482 std::vector<std::string> ret;
484 while (lua_next(L, -2) != 0) {
485 ret.push_back(lua_tostring(L, -1));
489 assert(lua_gettop(L) == 0);
493 void Theme::connect_signal(YCbCrInput *input, int signal_num)
495 if (signal_num >= int(num_cards)) {
496 if (signals_warned_about.insert(signal_num).second) {
497 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u card(s).\n", signal_num, num_cards);
498 fprintf(stderr, "Mapping to card %d instead.\n", signal_num % num_cards);
500 signal_num %= num_cards;
502 input->set_texture_num(0, input_textures[signal_num].tex_y);
503 input->set_texture_num(1, input_textures[signal_num].tex_cbcr);
506 void Theme::transition_clicked(int transition_num, float t)
508 unique_lock<mutex> lock(m);
509 lua_getglobal(L, "transition_clicked");
510 lua_pushnumber(L, transition_num);
511 lua_pushnumber(L, t);
513 if (lua_pcall(L, 2, 0, 0) != 0) {
514 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
517 assert(lua_gettop(L) == 0);
520 void Theme::channel_clicked(int preview_num)
522 unique_lock<mutex> lock(m);
523 lua_getglobal(L, "channel_clicked");
524 lua_pushnumber(L, preview_num);
526 if (lua_pcall(L, 1, 0, 0) != 0) {
527 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
530 assert(lua_gettop(L) == 0);