4 #include <bmusb/bmusb.h>
8 #include <movit/deinterlace_effect.h>
9 #include <movit/effect.h>
10 #include <movit/effect_chain.h>
11 #include <movit/image_format.h>
12 #include <movit/input.h>
13 #include <movit/lift_gamma_gain_effect.h>
14 #include <movit/mix_effect.h>
15 #include <movit/multiply_effect.h>
16 #include <movit/overlay_effect.h>
17 #include <movit/padding_effect.h>
18 #include <movit/resample_effect.h>
19 #include <movit/resize_effect.h>
20 #include <movit/util.h>
21 #include <movit/white_balance_effect.h>
22 #include <movit/ycbcr.h>
23 #include <movit/ycbcr_input.h>
33 #include "cef_capture.h"
35 #include "ffmpeg_capture.h"
37 #include "image_input.h"
38 #include "input_state.h"
39 #include "pbo_frame_allocator.h"
48 using namespace movit;
50 extern Mixer *global_mixer;
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 int ThemeMenu_set(lua_State *L)
60 Theme *theme = get_theme_updata(L);
61 return theme->set_theme_menu(L);
66 // Contains basically the same data as InputState, but does not hold on to
67 // a reference to the frames. This is important so that we can release them
68 // without having to wait for Lua's GC.
69 struct InputStateInfo {
70 InputStateInfo(const InputState& input_state);
72 unsigned last_width[MAX_VIDEO_CARDS], last_height[MAX_VIDEO_CARDS];
73 bool last_interlaced[MAX_VIDEO_CARDS], last_has_signal[MAX_VIDEO_CARDS], last_is_connected[MAX_VIDEO_CARDS];
74 unsigned last_frame_rate_nom[MAX_VIDEO_CARDS], last_frame_rate_den[MAX_VIDEO_CARDS];
75 bool has_last_subtitle[MAX_VIDEO_CARDS];
76 std::string last_subtitle[MAX_VIDEO_CARDS];
79 InputStateInfo::InputStateInfo(const InputState &input_state)
81 for (unsigned signal_num = 0; signal_num < MAX_VIDEO_CARDS; ++signal_num) {
82 BufferedFrame frame = input_state.buffered_frames[signal_num][0];
83 if (frame.frame == nullptr) {
84 last_width[signal_num] = last_height[signal_num] = 0;
85 last_interlaced[signal_num] = false;
86 last_has_signal[signal_num] = false;
87 last_is_connected[signal_num] = false;
90 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
91 last_width[signal_num] = userdata->last_width[frame.field_number];
92 last_height[signal_num] = userdata->last_height[frame.field_number];
93 last_interlaced[signal_num] = userdata->last_interlaced;
94 last_has_signal[signal_num] = userdata->last_has_signal;
95 last_is_connected[signal_num] = userdata->last_is_connected;
96 last_frame_rate_nom[signal_num] = userdata->last_frame_rate_nom;
97 last_frame_rate_den[signal_num] = userdata->last_frame_rate_den;
98 has_last_subtitle[signal_num] = userdata->has_last_subtitle;
99 last_subtitle[signal_num] = userdata->last_subtitle;
103 class LuaRefWithDeleter {
105 LuaRefWithDeleter(mutex *m, lua_State *L, int ref) : m(m), L(L), ref(ref) {}
106 ~LuaRefWithDeleter() {
107 lock_guard<mutex> lock(*m);
108 luaL_unref(L, LUA_REGISTRYINDEX, ref);
110 int get() const { return ref; }
113 LuaRefWithDeleter(const LuaRefWithDeleter &) = delete;
120 template<class T, class... Args>
121 int wrap_lua_object(lua_State* L, const char *class_name, Args&&... args)
123 // Construct the C++ object and put it on the stack.
124 void *mem = lua_newuserdata(L, sizeof(T));
125 new(mem) T(forward<Args>(args)...);
127 // Look up the metatable named <class_name>, and set it on the new object.
128 luaL_getmetatable(L, class_name);
129 lua_setmetatable(L, -2);
134 // Like wrap_lua_object, but the object is not owned by Lua; ie. it's not freed
135 // by Lua GC. This is typically the case for Effects, which are owned by EffectChain
136 // and expected to be destructed by it. The object will be of type T** instead of T*
137 // when exposed to Lua.
139 // Note that we currently leak if you allocate an Effect in this way and never call
140 // add_effect. We should see if there's a way to e.g. set __gc on it at construction time
141 // and then release that once add_effect() takes ownership.
142 template<class T, class... Args>
143 int wrap_lua_object_nonowned(lua_State* L, const char *class_name, Args&&... args)
145 // Construct the pointer ot the C++ object and put it on the stack.
146 T **obj = (T **)lua_newuserdata(L, sizeof(T *));
147 *obj = new T(forward<Args>(args)...);
149 // Look up the metatable named <class_name>, and set it on the new object.
150 luaL_getmetatable(L, class_name);
151 lua_setmetatable(L, -2);
157 WHITE_BALANCE_EFFECT,
160 INTEGRAL_PADDING_EFFECT,
165 LIFT_GAMMA_GAIN_EFFECT
168 Effect *instantiate_effect(EffectChain *chain, EffectType effect_type)
170 switch (effect_type) {
171 case WHITE_BALANCE_EFFECT:
172 return new WhiteBalanceEffect;
173 case RESAMPLE_EFFECT:
174 return new ResampleEffect;
176 return new PaddingEffect;
177 case INTEGRAL_PADDING_EFFECT:
178 return new IntegralPaddingEffect;
180 return new OverlayEffect;
182 return new ResizeEffect;
183 case MULTIPLY_EFFECT:
184 return new MultiplyEffect;
186 return new MixEffect;
187 case LIFT_GAMMA_GAIN_EFFECT:
188 return new LiftGammaGainEffect;
190 fprintf(stderr, "Unhandled effect type %d\n", effect_type);
195 // An EffectBlueprint refers to an Effect before it's being added to the graph.
196 // It contains enough information to instantiate the effect, including any
197 // parameters that were set before it was added to the graph. Once it is
198 // instantiated, it forwards its calls on to the real Effect instead.
199 struct EffectBlueprint {
200 EffectBlueprint(EffectType effect_type) : effect_type(effect_type) {}
202 EffectType effect_type;
203 map<string, int> int_parameters;
204 map<string, float> float_parameters;
205 map<string, array<float, 3>> vec3_parameters;
206 map<string, array<float, 4>> vec4_parameters;
208 Effect *effect = nullptr; // Gets filled out when it's instantiated.
211 Effect *get_effect_from_blueprint(EffectChain *chain, lua_State *L, int idx)
213 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, idx, "EffectBlueprint");
214 if (blueprint->effect != nullptr) {
215 // NOTE: This will change in the future.
216 luaL_error(L, "An effect can currently only be added to one chain.\n");
219 Effect *effect = instantiate_effect(chain, blueprint->effect_type);
221 // Set the parameters that were deferred earlier.
222 for (const auto &kv : blueprint->int_parameters) {
223 if (!effect->set_int(kv.first, kv.second)) {
224 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", kv.first.c_str(), kv.second);
227 for (const auto &kv : blueprint->float_parameters) {
228 if (!effect->set_float(kv.first, kv.second)) {
229 luaL_error(L, "Effect refused set_float(\"%s\", %f) (invalid key?)", kv.first.c_str(), kv.second);
232 for (const auto &kv : blueprint->vec3_parameters) {
233 if (!effect->set_vec3(kv.first, kv.second.data())) {
234 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", kv.first.c_str(),
235 kv.second[0], kv.second[1], kv.second[2]);
238 for (const auto &kv : blueprint->vec4_parameters) {
239 if (!effect->set_vec4(kv.first, kv.second.data())) {
240 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", kv.first.c_str(),
241 kv.second[0], kv.second[1], kv.second[2], kv.second[3]);
244 blueprint->effect = effect;
248 InputStateInfo *get_input_state_info(lua_State *L, int idx)
250 if (luaL_testudata(L, idx, "InputStateInfo")) {
251 return (InputStateInfo *)lua_touserdata(L, idx);
253 luaL_error(L, "Error: Index #%d was not InputStateInfo\n", idx);
257 bool checkbool(lua_State* L, int idx)
259 luaL_checktype(L, idx, LUA_TBOOLEAN);
260 return lua_toboolean(L, idx);
263 string checkstdstring(lua_State *L, int index)
266 const char* cstr = lua_tolstring(L, index, &len);
267 return string(cstr, len);
270 void add_outputs_and_finalize(EffectChain *chain, bool is_main_chain)
272 // Add outputs as needed.
273 // NOTE: If you change any details about the output format, you will need to
274 // also update what's given to the muxer (HTTPD::Mux constructor) and
275 // what's put in the H.264 stream (sps_rbsp()).
276 ImageFormat inout_format;
277 inout_format.color_space = COLORSPACE_REC_709;
279 // Output gamma is tricky. We should output Rec. 709 for TV, except that
280 // we expect to run with web players and others that don't really care and
281 // just output with no conversion. So that means we'll need to output sRGB,
282 // even though H.264 has no setting for that (we use “unspecified”).
283 inout_format.gamma_curve = GAMMA_sRGB;
286 YCbCrFormat output_ycbcr_format;
287 // We actually output 4:2:0 and/or 4:2:2 in the end, but chroma subsampling
288 // happens in a pass not run by Movit (see ChromaSubsampler::subsample_chroma()).
289 output_ycbcr_format.chroma_subsampling_x = 1;
290 output_ycbcr_format.chroma_subsampling_y = 1;
292 // This will be overridden if HDMI/SDI output is in force.
293 if (global_flags.ycbcr_rec709_coefficients) {
294 output_ycbcr_format.luma_coefficients = YCBCR_REC_709;
296 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
299 output_ycbcr_format.full_range = false;
300 output_ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
302 GLenum type = global_flags.x264_bit_depth > 8 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_BYTE;
304 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR, type);
306 // If we're using zerocopy video encoding (so the destination
307 // Y texture is owned by VA-API and will be unavailable for
308 // display), add a copy, where we'll only be using the Y component.
309 if (global_flags.use_zerocopy) {
310 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_INTERLEAVED, type); // Add a copy where we'll only be using the Y component.
312 chain->set_dither_bits(global_flags.x264_bit_depth > 8 ? 16 : 8);
313 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
315 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
321 int EffectChain_new(lua_State* L)
323 assert(lua_gettop(L) == 2);
324 Theme *theme = get_theme_updata(L);
325 int aspect_w = luaL_checknumber(L, 1);
326 int aspect_h = luaL_checknumber(L, 2);
328 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h, theme->get_resource_pool());
331 int EffectChain_gc(lua_State* L)
333 assert(lua_gettop(L) == 1);
334 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
335 chain->~EffectChain();
339 int EffectChain_add_live_input(lua_State* L)
341 assert(lua_gettop(L) == 3);
342 Theme *theme = get_theme_updata(L);
343 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
344 bool override_bounce = checkbool(L, 2);
345 bool deinterlace = checkbool(L, 3);
346 bmusb::PixelFormat pixel_format = global_flags.ten_bit_input ? bmusb::PixelFormat_10BitYCbCr : bmusb::PixelFormat_8BitYCbCr;
348 // Needs to be nonowned to match add_video_input (see below).
349 return wrap_lua_object_nonowned<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain, pixel_format, override_bounce, deinterlace, /*user_connectable=*/true);
352 int EffectChain_add_video_input(lua_State* L)
354 assert(lua_gettop(L) == 3);
355 Theme *theme = get_theme_updata(L);
356 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
357 FFmpegCapture **capture = (FFmpegCapture **)luaL_checkudata(L, 2, "VideoInput");
358 bool deinterlace = checkbool(L, 3);
360 // These need to be nonowned, so that the LiveInputWrapper still exists
361 // and can feed frames to the right EffectChain even if the Lua code
362 // doesn't care about the object anymore. (If we change this, we'd need
363 // to also unregister the signal connection on __gc.)
364 int ret = wrap_lua_object_nonowned<LiveInputWrapper>(
365 L, "LiveInputWrapper", theme, chain, (*capture)->get_current_pixel_format(),
366 /*override_bounce=*/false, deinterlace, /*user_connectable=*/false);
368 Theme *theme = get_theme_updata(L);
369 LiveInputWrapper **live_input = (LiveInputWrapper **)lua_touserdata(L, -1);
370 theme->register_video_signal_connection(chain, *live_input, *capture);
376 int EffectChain_add_html_input(lua_State* L)
378 assert(lua_gettop(L) == 2);
379 Theme *theme = get_theme_updata(L);
380 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
381 CEFCapture **capture = (CEFCapture **)luaL_checkudata(L, 2, "HTMLInput");
383 // These need to be nonowned, so that the LiveInputWrapper still exists
384 // and can feed frames to the right EffectChain even if the Lua code
385 // doesn't care about the object anymore. (If we change this, we'd need
386 // to also unregister the signal connection on __gc.)
387 int ret = wrap_lua_object_nonowned<LiveInputWrapper>(
388 L, "LiveInputWrapper", theme, chain, (*capture)->get_current_pixel_format(),
389 /*override_bounce=*/false, /*deinterlace=*/false, /*user_connectable=*/false);
391 Theme *theme = get_theme_updata(L);
392 LiveInputWrapper **live_input = (LiveInputWrapper **)lua_touserdata(L, -1);
393 theme->register_html_signal_connection(chain, *live_input, *capture);
399 int EffectChain_add_effect(lua_State* L)
401 assert(lua_gettop(L) >= 2);
402 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
404 // TODO: Better error reporting.
406 if (luaL_testudata(L, 2, "ImageInput")) {
407 effect = *(ImageInput **)luaL_checkudata(L, 2, "ImageInput");
409 effect = get_effect_from_blueprint(chain, L, 2);
411 if (lua_gettop(L) == 2) {
412 if (effect->num_inputs() == 0) {
413 chain->add_input((Input *)effect);
415 chain->add_effect(effect);
418 vector<Effect *> inputs;
419 for (int idx = 3; idx <= lua_gettop(L); ++idx) {
420 if (luaL_testudata(L, idx, "LiveInputWrapper")) {
421 LiveInputWrapper **input = (LiveInputWrapper **)lua_touserdata(L, idx);
422 inputs.push_back((*input)->get_effect());
423 } else if (luaL_testudata(L, idx, "ImageInput")) {
424 ImageInput *image = *(ImageInput **)luaL_checkudata(L, idx, "ImageInput");
425 inputs.push_back(image);
427 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, idx, "EffectBlueprint");
428 assert(blueprint->effect != nullptr); // Parent must be added to the graph.
429 inputs.push_back(blueprint->effect);
432 chain->add_effect(effect, inputs);
435 lua_settop(L, 2); // Return the effect itself.
437 // Make sure Lua doesn't garbage-collect it away.
438 lua_pushvalue(L, -1);
439 luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak?
444 int EffectChain_finalize(lua_State* L)
446 assert(lua_gettop(L) == 2);
447 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
448 bool is_main_chain = checkbool(L, 2);
449 add_outputs_and_finalize(chain, is_main_chain);
453 int LiveInputWrapper_connect_signal(lua_State* L)
455 assert(lua_gettop(L) == 2);
456 LiveInputWrapper **input = (LiveInputWrapper **)luaL_checkudata(L, 1, "LiveInputWrapper");
457 int signal_num = luaL_checknumber(L, 2);
458 bool success = (*input)->connect_signal(signal_num);
461 lua_getstack(L, 1, &ar);
462 lua_getinfo(L, "nSl", &ar);
463 fprintf(stderr, "ERROR: %s:%d: Calling connect_signal() on a video or HTML input. Ignoring.\n",
464 ar.source, ar.currentline);
469 int ImageInput_new(lua_State* L)
471 assert(lua_gettop(L) == 1);
472 string filename = checkstdstring(L, 1);
473 return wrap_lua_object_nonowned<ImageInput>(L, "ImageInput", filename);
476 int VideoInput_new(lua_State* L)
478 assert(lua_gettop(L) == 2);
479 string filename = checkstdstring(L, 1);
480 int pixel_format = luaL_checknumber(L, 2);
481 if (pixel_format != bmusb::PixelFormat_8BitYCbCrPlanar &&
482 pixel_format != bmusb::PixelFormat_8BitBGRA) {
483 fprintf(stderr, "WARNING: Invalid enum %d used for video format, choosing Y'CbCr.\n",
485 pixel_format = bmusb::PixelFormat_8BitYCbCrPlanar;
487 int ret = wrap_lua_object_nonowned<FFmpegCapture>(L, "VideoInput", filename, global_flags.width, global_flags.height);
489 FFmpegCapture **capture = (FFmpegCapture **)lua_touserdata(L, -1);
490 (*capture)->set_pixel_format(bmusb::PixelFormat(pixel_format));
492 Theme *theme = get_theme_updata(L);
493 theme->register_video_input(*capture);
498 int VideoInput_rewind(lua_State* L)
500 assert(lua_gettop(L) == 1);
501 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
502 (*video_input)->rewind();
506 int VideoInput_disconnect(lua_State* L)
508 assert(lua_gettop(L) == 1);
509 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
510 (*video_input)->disconnect();
514 int VideoInput_change_rate(lua_State* L)
516 assert(lua_gettop(L) == 2);
517 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
518 double new_rate = luaL_checknumber(L, 2);
519 (*video_input)->change_rate(new_rate);
523 int VideoInput_get_signal_num(lua_State* L)
525 assert(lua_gettop(L) == 1);
526 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
527 lua_pushnumber(L, -1 - (*video_input)->get_card_index());
531 int HTMLInput_new(lua_State* L)
534 assert(lua_gettop(L) == 1);
535 string url = checkstdstring(L, 1);
536 int ret = wrap_lua_object_nonowned<CEFCapture>(L, "HTMLInput", url, global_flags.width, global_flags.height);
538 CEFCapture **capture = (CEFCapture **)lua_touserdata(L, -1);
539 Theme *theme = get_theme_updata(L);
540 theme->register_html_input(*capture);
544 fprintf(stderr, "This version of Nageru has been compiled without CEF support.\n");
545 fprintf(stderr, "HTMLInput is not available.\n");
551 int HTMLInput_set_url(lua_State* L)
553 assert(lua_gettop(L) == 2);
554 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
555 string new_url = checkstdstring(L, 2);
556 (*video_input)->set_url(new_url);
560 int HTMLInput_reload(lua_State* L)
562 assert(lua_gettop(L) == 1);
563 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
564 (*video_input)->reload();
568 int HTMLInput_set_max_fps(lua_State* L)
570 assert(lua_gettop(L) == 2);
571 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
572 int max_fps = lrint(luaL_checknumber(L, 2));
573 (*video_input)->set_max_fps(max_fps);
577 int HTMLInput_execute_javascript_async(lua_State* L)
579 assert(lua_gettop(L) == 2);
580 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
581 string js = checkstdstring(L, 2);
582 (*video_input)->execute_javascript_async(js);
586 int HTMLInput_resize(lua_State* L)
588 assert(lua_gettop(L) == 3);
589 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
590 unsigned width = lrint(luaL_checknumber(L, 2));
591 unsigned height = lrint(luaL_checknumber(L, 3));
592 (*video_input)->resize(width, height);
596 int HTMLInput_get_signal_num(lua_State* L)
598 assert(lua_gettop(L) == 1);
599 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
600 lua_pushnumber(L, -1 - (*video_input)->get_card_index());
605 int WhiteBalanceEffect_new(lua_State* L)
607 assert(lua_gettop(L) == 0);
608 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", WHITE_BALANCE_EFFECT);
611 int ResampleEffect_new(lua_State* L)
613 assert(lua_gettop(L) == 0);
614 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", RESAMPLE_EFFECT);
617 int PaddingEffect_new(lua_State* L)
619 assert(lua_gettop(L) == 0);
620 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", PADDING_EFFECT);
623 int IntegralPaddingEffect_new(lua_State* L)
625 assert(lua_gettop(L) == 0);
626 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", INTEGRAL_PADDING_EFFECT);
629 int OverlayEffect_new(lua_State* L)
631 assert(lua_gettop(L) == 0);
632 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", OVERLAY_EFFECT);
635 int ResizeEffect_new(lua_State* L)
637 assert(lua_gettop(L) == 0);
638 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", RESIZE_EFFECT);
641 int MultiplyEffect_new(lua_State* L)
643 assert(lua_gettop(L) == 0);
644 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", MULTIPLY_EFFECT);
647 int MixEffect_new(lua_State* L)
649 assert(lua_gettop(L) == 0);
650 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", MIX_EFFECT);
653 int LiftGammaGainEffect_new(lua_State* L)
655 assert(lua_gettop(L) == 0);
656 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", LIFT_GAMMA_GAIN_EFFECT);
659 int InputStateInfo_get_width(lua_State* L)
661 assert(lua_gettop(L) == 2);
662 InputStateInfo *input_state_info = get_input_state_info(L, 1);
663 Theme *theme = get_theme_updata(L);
664 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
665 lua_pushnumber(L, input_state_info->last_width[signal_num]);
669 int InputStateInfo_get_height(lua_State* L)
671 assert(lua_gettop(L) == 2);
672 InputStateInfo *input_state_info = get_input_state_info(L, 1);
673 Theme *theme = get_theme_updata(L);
674 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
675 lua_pushnumber(L, input_state_info->last_height[signal_num]);
679 int InputStateInfo_get_interlaced(lua_State* L)
681 assert(lua_gettop(L) == 2);
682 InputStateInfo *input_state_info = get_input_state_info(L, 1);
683 Theme *theme = get_theme_updata(L);
684 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
685 lua_pushboolean(L, input_state_info->last_interlaced[signal_num]);
689 int InputStateInfo_get_has_signal(lua_State* L)
691 assert(lua_gettop(L) == 2);
692 InputStateInfo *input_state_info = get_input_state_info(L, 1);
693 Theme *theme = get_theme_updata(L);
694 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
695 lua_pushboolean(L, input_state_info->last_has_signal[signal_num]);
699 int InputStateInfo_get_is_connected(lua_State* L)
701 assert(lua_gettop(L) == 2);
702 InputStateInfo *input_state_info = get_input_state_info(L, 1);
703 Theme *theme = get_theme_updata(L);
704 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
705 lua_pushboolean(L, input_state_info->last_is_connected[signal_num]);
709 int InputStateInfo_get_frame_rate_nom(lua_State* L)
711 assert(lua_gettop(L) == 2);
712 InputStateInfo *input_state_info = get_input_state_info(L, 1);
713 Theme *theme = get_theme_updata(L);
714 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
715 lua_pushnumber(L, input_state_info->last_frame_rate_nom[signal_num]);
719 int InputStateInfo_get_frame_rate_den(lua_State* L)
721 assert(lua_gettop(L) == 2);
722 InputStateInfo *input_state_info = get_input_state_info(L, 1);
723 Theme *theme = get_theme_updata(L);
724 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
725 lua_pushnumber(L, input_state_info->last_frame_rate_den[signal_num]);
729 int InputStateInfo_get_last_subtitle(lua_State* L)
731 assert(lua_gettop(L) == 2);
732 InputStateInfo *input_state_info = get_input_state_info(L, 1);
733 Theme *theme = get_theme_updata(L);
734 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
735 if (!input_state_info->has_last_subtitle[signal_num]) {
738 lua_pushstring(L, input_state_info->last_subtitle[signal_num].c_str());
743 int EffectBlueprint_set_int(lua_State *L)
745 assert(lua_gettop(L) == 3);
746 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
747 string key = checkstdstring(L, 2);
748 float value = luaL_checknumber(L, 3);
749 if (blueprint->effect != nullptr) {
750 if (!blueprint->effect->set_int(key, value)) {
751 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
754 // TODO: check validity already here, if possible?
755 blueprint->int_parameters[key] = value;
760 int EffectBlueprint_set_float(lua_State *L)
762 assert(lua_gettop(L) == 3);
763 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
764 string key = checkstdstring(L, 2);
765 float value = luaL_checknumber(L, 3);
766 if (blueprint->effect != nullptr) {
767 if (!blueprint->effect->set_float(key, value)) {
768 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
771 // TODO: check validity already here, if possible?
772 blueprint->float_parameters[key] = value;
777 int EffectBlueprint_set_vec3(lua_State *L)
779 assert(lua_gettop(L) == 5);
780 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
781 string key = checkstdstring(L, 2);
783 v[0] = luaL_checknumber(L, 3);
784 v[1] = luaL_checknumber(L, 4);
785 v[2] = luaL_checknumber(L, 5);
787 if (blueprint->effect != nullptr) {
788 if (!blueprint->effect->set_vec3(key, v.data())) {
789 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", key.c_str(),
793 // TODO: check validity already here, if possible?
794 blueprint->vec3_parameters[key] = v;
800 int EffectBlueprint_set_vec4(lua_State *L)
802 assert(lua_gettop(L) == 6);
803 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
804 string key = checkstdstring(L, 2);
806 v[0] = luaL_checknumber(L, 3);
807 v[1] = luaL_checknumber(L, 4);
808 v[2] = luaL_checknumber(L, 5);
809 v[3] = luaL_checknumber(L, 6);
810 if (blueprint->effect != nullptr) {
811 if (!blueprint->effect->set_vec4(key, v.data())) {
812 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", key.c_str(),
813 v[0], v[1], v[2], v[3]);
816 // TODO: check validity already here, if possible?
817 blueprint->vec4_parameters[key] = v;
822 const luaL_Reg EffectBlueprint_funcs[] = {
823 // NOTE: No new() function; that's for the individual effects.
824 { "set_int", EffectBlueprint_set_int },
825 { "set_float", EffectBlueprint_set_float },
826 { "set_vec3", EffectBlueprint_set_vec3 },
827 { "set_vec4", EffectBlueprint_set_vec4 },
831 const luaL_Reg EffectChain_funcs[] = {
832 { "new", EffectChain_new },
833 { "__gc", EffectChain_gc },
834 { "add_live_input", EffectChain_add_live_input },
835 { "add_video_input", EffectChain_add_video_input },
837 { "add_html_input", EffectChain_add_html_input },
839 { "add_effect", EffectChain_add_effect },
840 { "finalize", EffectChain_finalize },
844 const luaL_Reg LiveInputWrapper_funcs[] = {
845 { "connect_signal", LiveInputWrapper_connect_signal },
849 const luaL_Reg ImageInput_funcs[] = {
850 { "new", ImageInput_new },
854 const luaL_Reg VideoInput_funcs[] = {
855 { "new", VideoInput_new },
856 { "rewind", VideoInput_rewind },
857 { "disconnect", VideoInput_disconnect },
858 { "change_rate", VideoInput_change_rate },
859 { "get_signal_num", VideoInput_get_signal_num },
863 const luaL_Reg HTMLInput_funcs[] = {
864 { "new", HTMLInput_new },
866 { "set_url", HTMLInput_set_url },
867 { "reload", HTMLInput_reload },
868 { "set_max_fps", HTMLInput_set_max_fps },
869 { "execute_javascript_async", HTMLInput_execute_javascript_async },
870 { "resize", HTMLInput_resize },
871 { "get_signal_num", HTMLInput_get_signal_num },
877 // All of these are solely for new(); the returned metatable will be that of
878 // EffectBlueprint, and Effect (returned from add_effect()) is its own type.
880 const luaL_Reg WhiteBalanceEffect_funcs[] = {
881 { "new", WhiteBalanceEffect_new },
885 const luaL_Reg ResampleEffect_funcs[] = {
886 { "new", ResampleEffect_new },
890 const luaL_Reg PaddingEffect_funcs[] = {
891 { "new", PaddingEffect_new },
895 const luaL_Reg IntegralPaddingEffect_funcs[] = {
896 { "new", IntegralPaddingEffect_new },
900 const luaL_Reg OverlayEffect_funcs[] = {
901 { "new", OverlayEffect_new },
905 const luaL_Reg ResizeEffect_funcs[] = {
906 { "new", ResizeEffect_new },
910 const luaL_Reg MultiplyEffect_funcs[] = {
911 { "new", MultiplyEffect_new },
915 const luaL_Reg MixEffect_funcs[] = {
916 { "new", MixEffect_new },
920 const luaL_Reg LiftGammaGainEffect_funcs[] = {
921 { "new", LiftGammaGainEffect_new },
927 const luaL_Reg InputStateInfo_funcs[] = {
928 { "get_width", InputStateInfo_get_width },
929 { "get_height", InputStateInfo_get_height },
930 { "get_interlaced", InputStateInfo_get_interlaced },
931 { "get_has_signal", InputStateInfo_get_has_signal },
932 { "get_is_connected", InputStateInfo_get_is_connected },
933 { "get_frame_rate_nom", InputStateInfo_get_frame_rate_nom },
934 { "get_frame_rate_den", InputStateInfo_get_frame_rate_den },
935 { "get_last_subtitle", InputStateInfo_get_last_subtitle },
939 const luaL_Reg ThemeMenu_funcs[] = {
940 { "set", ThemeMenu_set },
946 LiveInputWrapper::LiveInputWrapper(
949 bmusb::PixelFormat pixel_format,
950 bool override_bounce,
952 bool user_connectable)
954 pixel_format(pixel_format),
955 deinterlace(deinterlace),
956 user_connectable(user_connectable)
958 ImageFormat inout_format;
959 inout_format.color_space = COLORSPACE_sRGB;
961 // Gamma curve depends on the input signal, and we don't really get any
962 // indications. A camera would be expected to do Rec. 709, but
963 // I haven't checked if any do in practice. However, computers _do_ output
964 // in sRGB gamma (ie., they don't convert from sRGB to Rec. 709), and
965 // I wouldn't really be surprised if most non-professional cameras do, too.
966 // So we pick sRGB as the least evil here.
967 inout_format.gamma_curve = GAMMA_sRGB;
971 deinterlace_effect = new movit::DeinterlaceEffect();
973 // As per the comments in deinterlace_effect.h, we turn this off.
974 // The most likely interlaced input for us is either a camera
975 // (where it's fine to turn it off) or a laptop (where it _should_
977 CHECK(deinterlace_effect->set_int("enable_spatial_interlacing_check", 0));
979 num_inputs = deinterlace_effect->num_inputs();
980 assert(num_inputs == FRAME_HISTORY_LENGTH);
985 if (pixel_format == bmusb::PixelFormat_8BitBGRA) {
986 for (unsigned i = 0; i < num_inputs; ++i) {
987 // We upload our textures ourselves, and Movit swaps
988 // R and B in the shader if we specify BGRA, so lie and say RGBA.
989 rgba_inputs.push_back(new sRGBSwitchingFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
990 chain->add_input(rgba_inputs.back());
994 vector<Effect *> reverse_inputs(rgba_inputs.rbegin(), rgba_inputs.rend());
995 chain->add_effect(deinterlace_effect, reverse_inputs);
998 assert(pixel_format == bmusb::PixelFormat_8BitYCbCr ||
999 pixel_format == bmusb::PixelFormat_10BitYCbCr ||
1000 pixel_format == bmusb::PixelFormat_8BitYCbCrPlanar);
1002 // Most of these settings will be overridden later if using PixelFormat_8BitYCbCrPlanar.
1003 input_ycbcr_format.chroma_subsampling_x = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1 : 2;
1004 input_ycbcr_format.chroma_subsampling_y = 1;
1005 input_ycbcr_format.num_levels = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1024 : 256;
1006 input_ycbcr_format.cb_x_position = 0.0;
1007 input_ycbcr_format.cr_x_position = 0.0;
1008 input_ycbcr_format.cb_y_position = 0.5;
1009 input_ycbcr_format.cr_y_position = 0.5;
1010 input_ycbcr_format.luma_coefficients = YCBCR_REC_709; // Will be overridden later even if not planar.
1011 input_ycbcr_format.full_range = false; // Will be overridden later even if not planar.
1013 for (unsigned i = 0; i < num_inputs; ++i) {
1014 // When using 10-bit input, we're converting to interleaved through v210Converter.
1015 YCbCrInputSplitting splitting;
1016 if (pixel_format == bmusb::PixelFormat_10BitYCbCr) {
1017 splitting = YCBCR_INPUT_INTERLEAVED;
1018 } else if (pixel_format == bmusb::PixelFormat_8BitYCbCr) {
1019 splitting = YCBCR_INPUT_SPLIT_Y_AND_CBCR;
1021 splitting = YCBCR_INPUT_PLANAR;
1023 if (override_bounce) {
1024 ycbcr_inputs.push_back(new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
1026 ycbcr_inputs.push_back(new YCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
1028 chain->add_input(ycbcr_inputs.back());
1032 vector<Effect *> reverse_inputs(ycbcr_inputs.rbegin(), ycbcr_inputs.rend());
1033 chain->add_effect(deinterlace_effect, reverse_inputs);
1038 bool LiveInputWrapper::connect_signal(int signal_num)
1040 if (!user_connectable) {
1044 if (global_mixer == nullptr) {
1049 signal_num = theme->map_signal(signal_num);
1050 connect_signal_raw(signal_num, *theme->input_state);
1054 void LiveInputWrapper::connect_signal_raw(int signal_num, const InputState &input_state)
1056 BufferedFrame first_frame = input_state.buffered_frames[signal_num][0];
1057 if (first_frame.frame == nullptr) {
1061 unsigned width, height;
1063 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)first_frame.frame->userdata;
1064 width = userdata->last_width[first_frame.field_number];
1065 height = userdata->last_height[first_frame.field_number];
1066 if (userdata->last_interlaced) {
1071 movit::YCbCrLumaCoefficients ycbcr_coefficients = input_state.ycbcr_coefficients[signal_num];
1072 bool full_range = input_state.full_range[signal_num];
1074 if (input_state.ycbcr_coefficients_auto[signal_num]) {
1077 // The Blackmagic driver docs claim that the device outputs Y'CbCr
1078 // according to Rec. 601, but this seems to indicate the subsampling
1079 // positions only, as they publish Y'CbCr → RGB formulas that are
1080 // different for HD and SD (corresponding to Rec. 709 and 601, respectively),
1081 // and a Lenovo X1 gen 3 I used to test definitely outputs Rec. 709
1082 // (at least up to rounding error). Other devices seem to use Rec. 601
1083 // even on HD resolutions. Nevertheless, Rec. 709 _is_ the right choice
1084 // for HD, so we default to that if the user hasn't set anything.
1085 if (height >= 720) {
1086 ycbcr_coefficients = YCBCR_REC_709;
1088 ycbcr_coefficients = YCBCR_REC_601;
1092 // This is a global, but it doesn't really matter.
1093 input_ycbcr_format.luma_coefficients = ycbcr_coefficients;
1094 input_ycbcr_format.full_range = full_range;
1096 BufferedFrame last_good_frame = first_frame;
1097 for (unsigned i = 0; i < max(ycbcr_inputs.size(), rgba_inputs.size()); ++i) {
1098 BufferedFrame frame = input_state.buffered_frames[signal_num][i];
1099 if (frame.frame == nullptr) {
1100 // Not enough data; reuse last frame (well, field).
1101 // This is suboptimal, but we have nothing better.
1102 frame = last_good_frame;
1104 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
1106 unsigned this_width = userdata->last_width[frame.field_number];
1107 unsigned this_height = userdata->last_height[frame.field_number];
1108 if (this_width != width || this_height != height) {
1109 // Resolution changed; reuse last frame/field.
1110 frame = last_good_frame;
1111 userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
1114 assert(userdata->pixel_format == pixel_format);
1115 switch (pixel_format) {
1116 case bmusb::PixelFormat_8BitYCbCr:
1117 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
1118 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cbcr[frame.field_number]);
1119 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
1120 ycbcr_inputs[i]->set_width(width);
1121 ycbcr_inputs[i]->set_height(height);
1123 case bmusb::PixelFormat_8BitYCbCrPlanar:
1124 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
1125 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cb[frame.field_number]);
1126 ycbcr_inputs[i]->set_texture_num(2, userdata->tex_cr[frame.field_number]);
1127 ycbcr_inputs[i]->change_ycbcr_format(userdata->ycbcr_format);
1128 ycbcr_inputs[i]->set_width(width);
1129 ycbcr_inputs[i]->set_height(height);
1131 case bmusb::PixelFormat_10BitYCbCr:
1132 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_444[frame.field_number]);
1133 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
1134 ycbcr_inputs[i]->set_width(width);
1135 ycbcr_inputs[i]->set_height(height);
1137 case bmusb::PixelFormat_8BitBGRA:
1138 rgba_inputs[i]->set_texture_num(userdata->tex_rgba[frame.field_number]);
1139 rgba_inputs[i]->set_width(width);
1140 rgba_inputs[i]->set_height(height);
1146 last_good_frame = frame;
1150 BufferedFrame frame = input_state.buffered_frames[signal_num][0];
1151 CHECK(deinterlace_effect->set_int("current_field_position", frame.field_number));
1157 int call_num_channels(lua_State *L)
1159 lua_getglobal(L, "num_channels");
1161 if (lua_pcall(L, 0, 1, 0) != 0) {
1162 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
1166 int num_channels = luaL_checknumber(L, 1);
1168 assert(lua_gettop(L) == 0);
1169 return num_channels;
1174 Theme::Theme(const string &filename, const vector<string> &search_dirs, ResourcePool *resource_pool, unsigned num_cards)
1175 : resource_pool(resource_pool), num_cards(num_cards), signal_to_card_mapping(global_flags.default_stream_mapping)
1177 L = luaL_newstate();
1180 // Search through all directories until we find a file that will load
1181 // (as in, does not return LUA_ERRFILE); then run it. We store load errors
1182 // from all the attempts, and show them once we know we can't find any of them.
1184 vector<string> errors;
1185 bool success = false;
1187 vector<string> real_search_dirs;
1188 if (!filename.empty() && filename[0] == '/') {
1189 real_search_dirs.push_back("");
1191 real_search_dirs = search_dirs;
1196 for (const string &dir : real_search_dirs) {
1200 path = dir + "/" + filename;
1202 int err = luaL_loadfile(L, path.c_str());
1204 // Save the theme for when we're actually going to run it
1205 // (we need to set up the right environment below first,
1206 // and we couldn't do that before, because we didn't know the
1207 // path to put in Nageru.THEME_PATH).
1208 theme_code_ref = luaL_ref(L, LUA_REGISTRYINDEX);
1209 assert(lua_gettop(L) == 0);
1214 errors.push_back(lua_tostring(L, -1));
1216 if (err != LUA_ERRFILE) {
1217 // The file actually loaded, but failed to parse somehow. Abort; don't try the next one.
1223 for (const string &error : errors) {
1224 fprintf(stderr, "%s\n", error.c_str());
1228 assert(lua_gettop(L) == 0);
1230 // Make sure the path exposed to the theme (as Nageru.THEME_PATH;
1231 // can be useful for locating files when talking to CEF) is absolute.
1232 // In a sense, it would be nice if realpath() had a mode not to
1233 // resolve symlinks, but it doesn't, so we only call it if we don't
1234 // already have an absolute path (which may leave ../ elements etc.).
1235 if (path[0] == '/') {
1238 char *absolute_theme_path = realpath(path.c_str(), nullptr);
1239 theme_path = absolute_theme_path;
1240 free(absolute_theme_path);
1243 // Set up the API we provide.
1244 register_constants();
1245 register_class("EffectBlueprint", EffectBlueprint_funcs);
1246 register_class("EffectChain", EffectChain_funcs);
1247 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
1248 register_class("ImageInput", ImageInput_funcs);
1249 register_class("VideoInput", VideoInput_funcs);
1250 register_class("HTMLInput", HTMLInput_funcs);
1251 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
1252 register_class("ResampleEffect", ResampleEffect_funcs);
1253 register_class("PaddingEffect", PaddingEffect_funcs);
1254 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
1255 register_class("OverlayEffect", OverlayEffect_funcs);
1256 register_class("ResizeEffect", ResizeEffect_funcs);
1257 register_class("MultiplyEffect", MultiplyEffect_funcs);
1258 register_class("MixEffect", MixEffect_funcs);
1259 register_class("LiftGammaGainEffect", LiftGammaGainEffect_funcs);
1260 register_class("InputStateInfo", InputStateInfo_funcs);
1261 register_class("ThemeMenu", ThemeMenu_funcs);
1263 // Now actually run the theme to get everything set up.
1264 lua_rawgeti(L, LUA_REGISTRYINDEX, theme_code_ref);
1265 luaL_unref(L, LUA_REGISTRYINDEX, theme_code_ref);
1266 if (lua_pcall(L, 0, 0, 0)) {
1267 fprintf(stderr, "Error when running %s: %s\n", path.c_str(), lua_tostring(L, -1));
1270 assert(lua_gettop(L) == 0);
1272 // Ask it for the number of channels.
1273 num_channels = call_num_channels(L);
1281 void Theme::register_constants()
1283 // Set Nageru.VIDEO_FORMAT_BGRA = bmusb::PixelFormat_8BitBGRA, etc.
1284 const vector<pair<string, int>> num_constants = {
1285 { "VIDEO_FORMAT_BGRA", bmusb::PixelFormat_8BitBGRA },
1286 { "VIDEO_FORMAT_YCBCR", bmusb::PixelFormat_8BitYCbCrPlanar },
1288 const vector<pair<string, string>> str_constants = {
1289 { "THEME_PATH", theme_path },
1292 lua_newtable(L); // t = {}
1294 for (const pair<string, int> &constant : num_constants) {
1295 lua_pushstring(L, constant.first.c_str());
1296 lua_pushinteger(L, constant.second);
1297 lua_settable(L, 1); // t[key] = value
1299 for (const pair<string, string> &constant : str_constants) {
1300 lua_pushstring(L, constant.first.c_str());
1301 lua_pushstring(L, constant.second.c_str());
1302 lua_settable(L, 1); // t[key] = value
1305 lua_setglobal(L, "Nageru"); // Nageru = t
1306 assert(lua_gettop(L) == 0);
1309 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
1311 assert(lua_gettop(L) == 0);
1312 luaL_newmetatable(L, class_name); // mt = {}
1313 lua_pushlightuserdata(L, this);
1314 luaL_setfuncs(L, funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
1315 lua_pushvalue(L, -1);
1316 lua_setfield(L, -2, "__index"); // mt.__index = mt
1317 lua_setglobal(L, class_name); // ClassName = mt
1318 assert(lua_gettop(L) == 0);
1321 Theme::Chain Theme::get_chain(unsigned num, float t, unsigned width, unsigned height, const InputState &input_state)
1325 lock_guard<mutex> lock(m);
1326 assert(lua_gettop(L) == 0);
1327 lua_getglobal(L, "get_chain"); /* function to be called */
1328 lua_pushnumber(L, num);
1329 lua_pushnumber(L, t);
1330 lua_pushnumber(L, width);
1331 lua_pushnumber(L, height);
1332 wrap_lua_object<InputStateInfo>(L, "InputStateInfo", input_state);
1334 if (lua_pcall(L, 5, 2, 0) != 0) {
1335 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
1339 EffectChain *effect_chain = (EffectChain *)luaL_testudata(L, -2, "EffectChain");
1340 if (effect_chain == nullptr) {
1341 fprintf(stderr, "get_chain() for chain number %d did not return an EffectChain\n",
1345 chain.chain = effect_chain;
1346 if (!lua_isfunction(L, -1)) {
1347 fprintf(stderr, "Argument #-1 should be a function\n");
1350 lua_pushvalue(L, -1);
1351 shared_ptr<LuaRefWithDeleter> funcref(new LuaRefWithDeleter(&m, L, luaL_ref(L, LUA_REGISTRYINDEX)));
1353 assert(lua_gettop(L) == 0);
1355 chain.setup_chain = [this, funcref, input_state, effect_chain]{
1356 lock_guard<mutex> lock(m);
1358 assert(this->input_state == nullptr);
1359 this->input_state = &input_state;
1361 // Set up state, including connecting signals.
1362 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref->get());
1363 if (lua_pcall(L, 0, 0, 0) != 0) {
1364 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
1367 assert(lua_gettop(L) == 0);
1369 // The theme can't (or at least shouldn't!) call connect_signal() on
1370 // each FFmpeg or CEF input, so we'll do it here.
1371 if (video_signal_connections.count(effect_chain)) {
1372 for (const VideoSignalConnection &conn : video_signal_connections[effect_chain]) {
1373 conn.wrapper->connect_signal_raw(conn.source->get_card_index(), input_state);
1377 if (html_signal_connections.count(effect_chain)) {
1378 for (const CEFSignalConnection &conn : html_signal_connections[effect_chain]) {
1379 conn.wrapper->connect_signal_raw(conn.source->get_card_index(), input_state);
1384 this->input_state = nullptr;
1387 // TODO: Can we do better, e.g. by running setup_chain() and seeing what it references?
1388 // Actually, setup_chain does maybe hold all the references we need now anyway?
1389 chain.input_frames.reserve(num_cards * FRAME_HISTORY_LENGTH);
1390 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
1391 for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
1392 chain.input_frames.push_back(input_state.buffered_frames[card_index][frame_num].frame);
1399 string Theme::get_channel_name(unsigned channel)
1401 lock_guard<mutex> lock(m);
1402 lua_getglobal(L, "channel_name");
1403 lua_pushnumber(L, channel);
1404 if (lua_pcall(L, 1, 1, 0) != 0) {
1405 fprintf(stderr, "error running function `channel_name': %s\n", lua_tostring(L, -1));
1408 const char *ret = lua_tostring(L, -1);
1409 if (ret == nullptr) {
1410 fprintf(stderr, "function `channel_name' returned nil for channel %d\n", channel);
1414 string retstr = ret;
1416 assert(lua_gettop(L) == 0);
1420 int Theme::get_channel_signal(unsigned channel)
1422 lock_guard<mutex> lock(m);
1423 lua_getglobal(L, "channel_signal");
1424 lua_pushnumber(L, channel);
1425 if (lua_pcall(L, 1, 1, 0) != 0) {
1426 fprintf(stderr, "error running function `channel_signal': %s\n", lua_tostring(L, -1));
1430 int ret = luaL_checknumber(L, 1);
1432 assert(lua_gettop(L) == 0);
1436 std::string Theme::get_channel_color(unsigned channel)
1438 lock_guard<mutex> lock(m);
1439 lua_getglobal(L, "channel_color");
1440 lua_pushnumber(L, channel);
1441 if (lua_pcall(L, 1, 1, 0) != 0) {
1442 fprintf(stderr, "error running function `channel_color': %s\n", lua_tostring(L, -1));
1446 const char *ret = lua_tostring(L, -1);
1447 if (ret == nullptr) {
1448 fprintf(stderr, "function `channel_color' returned nil for channel %d\n", channel);
1452 string retstr = ret;
1454 assert(lua_gettop(L) == 0);
1458 bool Theme::get_supports_set_wb(unsigned channel)
1460 lock_guard<mutex> lock(m);
1461 lua_getglobal(L, "supports_set_wb");
1462 lua_pushnumber(L, channel);
1463 if (lua_pcall(L, 1, 1, 0) != 0) {
1464 fprintf(stderr, "error running function `supports_set_wb': %s\n", lua_tostring(L, -1));
1468 bool ret = checkbool(L, -1);
1470 assert(lua_gettop(L) == 0);
1474 void Theme::set_wb(unsigned channel, double r, double g, double b)
1476 lock_guard<mutex> lock(m);
1477 lua_getglobal(L, "set_wb");
1478 lua_pushnumber(L, channel);
1479 lua_pushnumber(L, r);
1480 lua_pushnumber(L, g);
1481 lua_pushnumber(L, b);
1482 if (lua_pcall(L, 4, 0, 0) != 0) {
1483 fprintf(stderr, "error running function `set_wb': %s\n", lua_tostring(L, -1));
1487 assert(lua_gettop(L) == 0);
1490 vector<string> Theme::get_transition_names(float t)
1492 lock_guard<mutex> lock(m);
1493 lua_getglobal(L, "get_transitions");
1494 lua_pushnumber(L, t);
1495 if (lua_pcall(L, 1, 1, 0) != 0) {
1496 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
1502 while (lua_next(L, -2) != 0) {
1503 ret.push_back(lua_tostring(L, -1));
1507 assert(lua_gettop(L) == 0);
1511 int Theme::map_signal(int signal_num)
1513 // Negative numbers map to raw signals.
1514 if (signal_num < 0) {
1515 return -1 - signal_num;
1518 lock_guard<mutex> lock(map_m);
1519 if (signal_to_card_mapping.count(signal_num)) {
1520 return signal_to_card_mapping[signal_num];
1524 if (global_flags.output_card != -1 && num_cards > 1) {
1525 // Try to exclude the output card from the default card_index.
1526 card_index = signal_num % (num_cards - 1);
1527 if (card_index >= global_flags.output_card) {
1530 if (signal_num >= int(num_cards - 1)) {
1531 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u input card(s) (card %d is busy with output).\n",
1532 signal_num, num_cards - 1, global_flags.output_card);
1533 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1536 card_index = signal_num % num_cards;
1537 if (signal_num >= int(num_cards)) {
1538 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u card(s).\n", signal_num, num_cards);
1539 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1542 signal_to_card_mapping[signal_num] = card_index;
1546 void Theme::set_signal_mapping(int signal_num, int card_num)
1548 lock_guard<mutex> lock(map_m);
1549 assert(card_num < int(num_cards));
1550 signal_to_card_mapping[signal_num] = card_num;
1553 void Theme::transition_clicked(int transition_num, float t)
1555 lock_guard<mutex> lock(m);
1556 lua_getglobal(L, "transition_clicked");
1557 lua_pushnumber(L, transition_num);
1558 lua_pushnumber(L, t);
1560 if (lua_pcall(L, 2, 0, 0) != 0) {
1561 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
1564 assert(lua_gettop(L) == 0);
1567 void Theme::channel_clicked(int preview_num)
1569 lock_guard<mutex> lock(m);
1570 lua_getglobal(L, "channel_clicked");
1571 lua_pushnumber(L, preview_num);
1573 if (lua_pcall(L, 1, 0, 0) != 0) {
1574 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
1577 assert(lua_gettop(L) == 0);
1580 int Theme::set_theme_menu(lua_State *L)
1582 for (const Theme::MenuEntry &entry : theme_menu) {
1583 luaL_unref(L, LUA_REGISTRYINDEX, entry.lua_ref);
1587 int num_elements = lua_gettop(L);
1588 for (int i = 1; i <= num_elements; ++i) {
1589 lua_rawgeti(L, i, 1);
1590 const string text = checkstdstring(L, -1);
1593 lua_rawgeti(L, i, 2);
1594 luaL_checktype(L, -1, LUA_TFUNCTION);
1595 int ref = luaL_ref(L, LUA_REGISTRYINDEX);
1597 theme_menu.push_back(MenuEntry{ text, ref });
1599 lua_pop(L, num_elements);
1600 assert(lua_gettop(L) == 0);
1602 if (theme_menu_callback != nullptr) {
1603 theme_menu_callback();
1609 void Theme::theme_menu_entry_clicked(int lua_ref)
1611 lock_guard<mutex> lock(m);
1612 lua_rawgeti(L, LUA_REGISTRYINDEX, lua_ref);
1613 if (lua_pcall(L, 0, 0, 0) != 0) {
1614 fprintf(stderr, "error running menu callback: %s\n", lua_tostring(L, -1));