4 #include <bmusb/bmusb.h>
9 #include <movit/deinterlace_effect.h>
10 #include <movit/effect.h>
11 #include <movit/effect_chain.h>
12 #include <movit/image_format.h>
13 #include <movit/input.h>
14 #include <movit/lift_gamma_gain_effect.h>
15 #include <movit/mix_effect.h>
16 #include <movit/multiply_effect.h>
17 #include <movit/overlay_effect.h>
18 #include <movit/padding_effect.h>
19 #include <movit/resample_effect.h>
20 #include <movit/resize_effect.h>
21 #include <movit/util.h>
22 #include <movit/white_balance_effect.h>
23 #include <movit/ycbcr.h>
24 #include <movit/ycbcr_input.h>
34 #include "cef_capture.h"
36 #include "ffmpeg_capture.h"
38 #include "image_input.h"
39 #include "input_state.h"
40 #include "lua_utils.h"
41 #include "pbo_frame_allocator.h"
51 using namespace movit;
53 extern Mixer *global_mixer;
55 Theme *get_theme_updata(lua_State* L)
57 luaL_checktype(L, lua_upvalueindex(1), LUA_TLIGHTUSERDATA);
58 return (Theme *)lua_touserdata(L, lua_upvalueindex(1));
61 void print_warning(lua_State* L, const char *format, ...)
66 vsnprintf(buf, sizeof(buf), format, ap);
70 lua_getstack(L, 1, &ar);
71 lua_getinfo(L, "nSl", &ar);
72 fprintf(stderr, "WARNING: %s:%d: %s", ar.source, ar.currentline, buf);
75 int ThemeMenu_set(lua_State *L)
77 Theme *theme = get_theme_updata(L);
78 return theme->set_theme_menu(L);
81 InputStateInfo::InputStateInfo(const InputState &input_state)
83 for (unsigned signal_num = 0; signal_num < MAX_VIDEO_CARDS; ++signal_num) {
84 BufferedFrame frame = input_state.buffered_frames[signal_num][0];
85 if (frame.frame == nullptr) {
86 last_width[signal_num] = last_height[signal_num] = 0;
87 last_interlaced[signal_num] = false;
88 last_has_signal[signal_num] = false;
89 last_is_connected[signal_num] = false;
92 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
93 last_width[signal_num] = userdata->last_width[frame.field_number];
94 last_height[signal_num] = userdata->last_height[frame.field_number];
95 last_interlaced[signal_num] = userdata->last_interlaced;
96 last_has_signal[signal_num] = userdata->last_has_signal;
97 last_is_connected[signal_num] = userdata->last_is_connected;
98 last_frame_rate_nom[signal_num] = userdata->last_frame_rate_nom;
99 last_frame_rate_den[signal_num] = userdata->last_frame_rate_den;
100 has_last_subtitle[signal_num] = userdata->has_last_subtitle;
101 last_subtitle[signal_num] = userdata->last_subtitle;
105 // An effect that does nothing.
106 class IdentityEffect : public Effect {
109 string effect_type_id() const override { return "IdentityEffect"; }
110 string output_fragment_shader() override { return read_file("identity.frag"); }
113 Effect *instantiate_effect(EffectChain *chain, EffectType effect_type)
115 switch (effect_type) {
116 case IDENTITY_EFFECT:
117 return new IdentityEffect;
118 case WHITE_BALANCE_EFFECT:
119 return new WhiteBalanceEffect;
120 case RESAMPLE_EFFECT:
121 return new ResampleEffect;
123 return new PaddingEffect;
124 case INTEGRAL_PADDING_EFFECT:
125 return new IntegralPaddingEffect;
127 return new OverlayEffect;
129 return new ResizeEffect;
130 case MULTIPLY_EFFECT:
131 return new MultiplyEffect;
133 return new MixEffect;
134 case LIFT_GAMMA_GAIN_EFFECT:
135 return new LiftGammaGainEffect;
137 fprintf(stderr, "Unhandled effect type %d\n", effect_type);
144 Effect *get_effect_from_blueprint(EffectChain *chain, lua_State *L, int idx)
146 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, idx, "EffectBlueprint");
147 if (blueprint->effect != nullptr) {
148 luaL_error(L, "An effect can currently only be added to one chain.\n");
151 Effect *effect = instantiate_effect(chain, blueprint->effect_type);
153 // Set the parameters that were deferred earlier.
154 for (const auto &kv : blueprint->int_parameters) {
155 if (!effect->set_int(kv.first, kv.second)) {
156 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", kv.first.c_str(), kv.second);
159 for (const auto &kv : blueprint->float_parameters) {
160 if (!effect->set_float(kv.first, kv.second)) {
161 luaL_error(L, "Effect refused set_float(\"%s\", %f) (invalid key?)", kv.first.c_str(), kv.second);
164 for (const auto &kv : blueprint->vec3_parameters) {
165 if (!effect->set_vec3(kv.first, kv.second.data())) {
166 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", kv.first.c_str(),
167 kv.second[0], kv.second[1], kv.second[2]);
170 for (const auto &kv : blueprint->vec4_parameters) {
171 if (!effect->set_vec4(kv.first, kv.second.data())) {
172 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", kv.first.c_str(),
173 kv.second[0], kv.second[1], kv.second[2], kv.second[3]);
176 blueprint->effect = effect;
180 InputStateInfo *get_input_state_info(lua_State *L, int idx)
182 if (luaL_testudata(L, idx, "InputStateInfo")) {
183 return (InputStateInfo *)lua_touserdata(L, idx);
185 luaL_error(L, "Error: Index #%d was not InputStateInfo\n", idx);
191 bool checkbool(lua_State* L, int idx)
193 luaL_checktype(L, idx, LUA_TBOOLEAN);
194 return lua_toboolean(L, idx);
197 string checkstdstring(lua_State *L, int index)
200 const char* cstr = lua_tolstring(L, index, &len);
201 return string(cstr, len);
206 int Scene_new(lua_State* L)
208 assert(lua_gettop(L) == 2);
209 Theme *theme = get_theme_updata(L);
210 int aspect_w = luaL_checknumber(L, 1);
211 int aspect_h = luaL_checknumber(L, 2);
213 return wrap_lua_object<Scene>(L, "Scene", theme, aspect_w, aspect_h);
216 int Scene_gc(lua_State* L)
218 assert(lua_gettop(L) == 1);
219 Scene *chain = (Scene *)luaL_checkudata(L, 1, "Scene");
226 void add_outputs_and_finalize(EffectChain *chain, bool is_main_chain)
228 // Add outputs as needed.
229 // NOTE: If you change any details about the output format, you will need to
230 // also update what's given to the muxer (HTTPD::Mux constructor) and
231 // what's put in the H.264 stream (sps_rbsp()).
232 ImageFormat inout_format;
233 inout_format.color_space = COLORSPACE_REC_709;
235 // Output gamma is tricky. We should output Rec. 709 for TV, except that
236 // we expect to run with web players and others that don't really care and
237 // just output with no conversion. So that means we'll need to output sRGB,
238 // even though H.264 has no setting for that (we use “unspecified”).
239 inout_format.gamma_curve = GAMMA_sRGB;
242 YCbCrFormat output_ycbcr_format;
243 // We actually output 4:2:0 and/or 4:2:2 in the end, but chroma subsampling
244 // happens in a pass not run by Movit (see ChromaSubsampler::subsample_chroma()).
245 output_ycbcr_format.chroma_subsampling_x = 1;
246 output_ycbcr_format.chroma_subsampling_y = 1;
248 // This will be overridden if HDMI/SDI output is in force.
249 if (global_flags.ycbcr_rec709_coefficients) {
250 output_ycbcr_format.luma_coefficients = YCBCR_REC_709;
252 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
255 output_ycbcr_format.full_range = false;
256 output_ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
258 GLenum type = global_flags.x264_bit_depth > 8 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_BYTE;
260 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR, type);
262 // If we're using zerocopy video encoding (so the destination
263 // Y texture is owned by VA-API and will be unavailable for
264 // display), add a copy, where we'll only be using the Y component.
265 if (global_flags.use_zerocopy) {
266 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.
268 chain->set_dither_bits(global_flags.x264_bit_depth > 8 ? 16 : 8);
269 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
271 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
279 int EffectChain_new(lua_State* L)
281 assert(lua_gettop(L) == 2);
282 Theme *theme = get_theme_updata(L);
283 int aspect_w = luaL_checknumber(L, 1);
284 int aspect_h = luaL_checknumber(L, 2);
286 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h, theme->get_resource_pool());
289 int EffectChain_gc(lua_State* L)
291 assert(lua_gettop(L) == 1);
292 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
293 chain->~EffectChain();
297 int EffectChain_add_live_input(lua_State* L)
299 assert(lua_gettop(L) == 3);
300 Theme *theme = get_theme_updata(L);
301 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
302 bool override_bounce = checkbool(L, 2);
303 bool deinterlace = checkbool(L, 3);
304 bmusb::PixelFormat pixel_format = global_flags.ten_bit_input ? bmusb::PixelFormat_10BitYCbCr : bmusb::PixelFormat_8BitYCbCr;
306 // Needs to be nonowned to match add_video_input (see below).
307 return wrap_lua_object_nonowned<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain, pixel_format, override_bounce, deinterlace, /*user_connectable=*/true);
310 int EffectChain_add_video_input(lua_State* L)
312 assert(lua_gettop(L) == 3);
313 Theme *theme = get_theme_updata(L);
314 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
315 FFmpegCapture **capture = (FFmpegCapture **)luaL_checkudata(L, 2, "VideoInput");
316 bool deinterlace = checkbool(L, 3);
318 // These need to be nonowned, so that the LiveInputWrapper still exists
319 // and can feed frames to the right EffectChain even if the Lua code
320 // doesn't care about the object anymore. (If we change this, we'd need
321 // to also unregister the signal connection on __gc.)
322 int ret = wrap_lua_object_nonowned<LiveInputWrapper>(
323 L, "LiveInputWrapper", theme, chain, (*capture)->get_current_pixel_format(),
324 /*override_bounce=*/false, deinterlace, /*user_connectable=*/false);
326 Theme *theme = get_theme_updata(L);
327 LiveInputWrapper **live_input = (LiveInputWrapper **)lua_touserdata(L, -1);
328 theme->register_video_signal_connection(chain, *live_input, *capture);
334 int EffectChain_add_html_input(lua_State* L)
336 assert(lua_gettop(L) == 2);
337 Theme *theme = get_theme_updata(L);
338 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
339 CEFCapture **capture = (CEFCapture **)luaL_checkudata(L, 2, "HTMLInput");
341 // These need to be nonowned, so that the LiveInputWrapper still exists
342 // and can feed frames to the right EffectChain even if the Lua code
343 // doesn't care about the object anymore. (If we change this, we'd need
344 // to also unregister the signal connection on __gc.)
345 int ret = wrap_lua_object_nonowned<LiveInputWrapper>(
346 L, "LiveInputWrapper", theme, chain, (*capture)->get_current_pixel_format(),
347 /*override_bounce=*/false, /*deinterlace=*/false, /*user_connectable=*/false);
349 Theme *theme = get_theme_updata(L);
350 LiveInputWrapper **live_input = (LiveInputWrapper **)lua_touserdata(L, -1);
351 theme->register_html_signal_connection(chain, *live_input, *capture);
357 int EffectChain_add_effect(lua_State* L)
359 assert(lua_gettop(L) >= 2);
360 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
362 // TODO: Better error reporting.
364 if (luaL_testudata(L, 2, "ImageInput")) {
365 effect = *(ImageInput **)luaL_checkudata(L, 2, "ImageInput");
367 effect = get_effect_from_blueprint(chain, L, 2);
369 if (lua_gettop(L) == 2) {
370 if (effect->num_inputs() == 0) {
371 chain->add_input((Input *)effect);
373 chain->add_effect(effect);
376 vector<Effect *> inputs;
377 for (int idx = 3; idx <= lua_gettop(L); ++idx) {
378 if (luaL_testudata(L, idx, "LiveInputWrapper")) {
379 LiveInputWrapper **input = (LiveInputWrapper **)lua_touserdata(L, idx);
380 inputs.push_back((*input)->get_effect());
381 } else if (luaL_testudata(L, idx, "ImageInput")) {
382 ImageInput *image = *(ImageInput **)luaL_checkudata(L, idx, "ImageInput");
383 inputs.push_back(image);
385 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, idx, "EffectBlueprint");
386 assert(blueprint->effect != nullptr); // Parent must be added to the graph.
387 inputs.push_back(blueprint->effect);
390 chain->add_effect(effect, inputs);
393 lua_settop(L, 2); // Return the effect itself.
395 // Make sure Lua doesn't garbage-collect it away.
396 lua_pushvalue(L, -1);
397 luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak?
402 int EffectChain_finalize(lua_State* L)
404 assert(lua_gettop(L) == 2);
405 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
406 bool is_main_chain = checkbool(L, 2);
407 add_outputs_and_finalize(chain, is_main_chain);
411 int LiveInputWrapper_connect_signal(lua_State* L)
413 assert(lua_gettop(L) == 2);
414 LiveInputWrapper **input = (LiveInputWrapper **)luaL_checkudata(L, 1, "LiveInputWrapper");
415 int signal_num = luaL_checknumber(L, 2);
416 bool success = (*input)->connect_signal(signal_num);
418 print_warning(L, "Calling connect_signal() on a video or HTML input. Ignoring.\n");
423 int ImageInput_new(lua_State* L)
425 assert(lua_gettop(L) == 1);
426 string filename = checkstdstring(L, 1);
427 return wrap_lua_object_nonowned<ImageInput>(L, "ImageInput", filename);
430 int VideoInput_new(lua_State* L)
432 assert(lua_gettop(L) == 2);
433 string filename = checkstdstring(L, 1);
434 int pixel_format = luaL_checknumber(L, 2);
435 if (pixel_format != bmusb::PixelFormat_8BitYCbCrPlanar &&
436 pixel_format != bmusb::PixelFormat_8BitBGRA) {
437 print_warning(L, "Invalid enum %d used for video format, choosing Y'CbCr.\n", pixel_format);
438 pixel_format = bmusb::PixelFormat_8BitYCbCrPlanar;
440 int ret = wrap_lua_object_nonowned<FFmpegCapture>(L, "VideoInput", filename, global_flags.width, global_flags.height);
442 FFmpegCapture **capture = (FFmpegCapture **)lua_touserdata(L, -1);
443 (*capture)->set_pixel_format(bmusb::PixelFormat(pixel_format));
445 Theme *theme = get_theme_updata(L);
446 theme->register_video_input(*capture);
451 int VideoInput_rewind(lua_State* L)
453 assert(lua_gettop(L) == 1);
454 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
455 (*video_input)->rewind();
459 int VideoInput_disconnect(lua_State* L)
461 assert(lua_gettop(L) == 1);
462 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
463 (*video_input)->disconnect();
467 int VideoInput_change_rate(lua_State* L)
469 assert(lua_gettop(L) == 2);
470 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
471 double new_rate = luaL_checknumber(L, 2);
472 (*video_input)->change_rate(new_rate);
476 int VideoInput_get_signal_num(lua_State* L)
478 assert(lua_gettop(L) == 1);
479 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
480 lua_pushnumber(L, -1 - (*video_input)->get_card_index());
484 int HTMLInput_new(lua_State* L)
487 assert(lua_gettop(L) == 1);
488 string url = checkstdstring(L, 1);
489 int ret = wrap_lua_object_nonowned<CEFCapture>(L, "HTMLInput", url, global_flags.width, global_flags.height);
491 CEFCapture **capture = (CEFCapture **)lua_touserdata(L, -1);
492 Theme *theme = get_theme_updata(L);
493 theme->register_html_input(*capture);
497 fprintf(stderr, "This version of Nageru has been compiled without CEF support.\n");
498 fprintf(stderr, "HTMLInput is not available.\n");
504 int HTMLInput_set_url(lua_State* L)
506 assert(lua_gettop(L) == 2);
507 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
508 string new_url = checkstdstring(L, 2);
509 (*video_input)->set_url(new_url);
513 int HTMLInput_reload(lua_State* L)
515 assert(lua_gettop(L) == 1);
516 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
517 (*video_input)->reload();
521 int HTMLInput_set_max_fps(lua_State* L)
523 assert(lua_gettop(L) == 2);
524 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
525 int max_fps = lrint(luaL_checknumber(L, 2));
526 (*video_input)->set_max_fps(max_fps);
530 int HTMLInput_execute_javascript_async(lua_State* L)
532 assert(lua_gettop(L) == 2);
533 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
534 string js = checkstdstring(L, 2);
535 (*video_input)->execute_javascript_async(js);
539 int HTMLInput_resize(lua_State* L)
541 assert(lua_gettop(L) == 3);
542 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
543 unsigned width = lrint(luaL_checknumber(L, 2));
544 unsigned height = lrint(luaL_checknumber(L, 3));
545 (*video_input)->resize(width, height);
549 int HTMLInput_get_signal_num(lua_State* L)
551 assert(lua_gettop(L) == 1);
552 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
553 lua_pushnumber(L, -1 - (*video_input)->get_card_index());
558 int IdentityEffect_new(lua_State* L)
560 assert(lua_gettop(L) == 0);
561 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", IDENTITY_EFFECT);
564 int WhiteBalanceEffect_new(lua_State* L)
566 assert(lua_gettop(L) == 0);
567 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", WHITE_BALANCE_EFFECT);
570 int ResampleEffect_new(lua_State* L)
572 assert(lua_gettop(L) == 0);
573 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", RESAMPLE_EFFECT);
576 int PaddingEffect_new(lua_State* L)
578 assert(lua_gettop(L) == 0);
579 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", PADDING_EFFECT);
582 int IntegralPaddingEffect_new(lua_State* L)
584 assert(lua_gettop(L) == 0);
585 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", INTEGRAL_PADDING_EFFECT);
588 int OverlayEffect_new(lua_State* L)
590 assert(lua_gettop(L) == 0);
591 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", OVERLAY_EFFECT);
594 int ResizeEffect_new(lua_State* L)
596 assert(lua_gettop(L) == 0);
597 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", RESIZE_EFFECT);
600 int MultiplyEffect_new(lua_State* L)
602 assert(lua_gettop(L) == 0);
603 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", MULTIPLY_EFFECT);
606 int MixEffect_new(lua_State* L)
608 assert(lua_gettop(L) == 0);
609 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", MIX_EFFECT);
612 int LiftGammaGainEffect_new(lua_State* L)
614 assert(lua_gettop(L) == 0);
615 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", LIFT_GAMMA_GAIN_EFFECT);
618 int InputStateInfo_get_width(lua_State* L)
620 assert(lua_gettop(L) == 2);
621 InputStateInfo *input_state_info = get_input_state_info(L, 1);
623 Theme *theme = get_theme_updata(L);
624 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
625 lua_pushnumber(L, input_state_info->last_width[signal_num]);
629 int InputStateInfo_get_height(lua_State* L)
631 assert(lua_gettop(L) == 2);
632 InputStateInfo *input_state_info = get_input_state_info(L, 1);
633 Theme *theme = get_theme_updata(L);
634 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
635 lua_pushnumber(L, input_state_info->last_height[signal_num]);
639 int InputStateInfo_get_interlaced(lua_State* L)
641 assert(lua_gettop(L) == 2);
642 InputStateInfo *input_state_info = get_input_state_info(L, 1);
643 Theme *theme = get_theme_updata(L);
644 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
645 lua_pushboolean(L, input_state_info->last_interlaced[signal_num]);
649 int InputStateInfo_get_has_signal(lua_State* L)
651 assert(lua_gettop(L) == 2);
652 InputStateInfo *input_state_info = get_input_state_info(L, 1);
653 Theme *theme = get_theme_updata(L);
654 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
655 lua_pushboolean(L, input_state_info->last_has_signal[signal_num]);
659 int InputStateInfo_get_is_connected(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_pushboolean(L, input_state_info->last_is_connected[signal_num]);
669 int InputStateInfo_get_frame_rate_nom(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_frame_rate_nom[signal_num]);
679 int InputStateInfo_get_frame_rate_den(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_pushnumber(L, input_state_info->last_frame_rate_den[signal_num]);
689 int InputStateInfo_get_last_subtitle(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 if (!input_state_info->has_last_subtitle[signal_num]) {
698 lua_pushstring(L, input_state_info->last_subtitle[signal_num].c_str());
703 int EffectBlueprint_set_int(lua_State *L)
705 assert(lua_gettop(L) == 3);
706 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
707 string key = checkstdstring(L, 2);
708 float value = luaL_checknumber(L, 3);
709 if (blueprint->effect != nullptr) {
710 if (!blueprint->effect->set_int(key, value)) {
711 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
714 // TODO: check validity already here, if possible?
715 blueprint->int_parameters[key] = value;
720 int EffectBlueprint_set_float(lua_State *L)
722 assert(lua_gettop(L) == 3);
723 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
724 string key = checkstdstring(L, 2);
725 float value = luaL_checknumber(L, 3);
726 if (blueprint->effect != nullptr) {
727 if (!blueprint->effect->set_float(key, value)) {
728 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
731 // TODO: check validity already here, if possible?
732 blueprint->float_parameters[key] = value;
737 int EffectBlueprint_set_vec3(lua_State *L)
739 assert(lua_gettop(L) == 5);
740 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
741 string key = checkstdstring(L, 2);
743 v[0] = luaL_checknumber(L, 3);
744 v[1] = luaL_checknumber(L, 4);
745 v[2] = luaL_checknumber(L, 5);
747 if (blueprint->effect != nullptr) {
748 if (!blueprint->effect->set_vec3(key, v.data())) {
749 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", key.c_str(),
753 // TODO: check validity already here, if possible?
754 blueprint->vec3_parameters[key] = v;
760 int EffectBlueprint_set_vec4(lua_State *L)
762 assert(lua_gettop(L) == 6);
763 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
764 string key = checkstdstring(L, 2);
766 v[0] = luaL_checknumber(L, 3);
767 v[1] = luaL_checknumber(L, 4);
768 v[2] = luaL_checknumber(L, 5);
769 v[3] = luaL_checknumber(L, 6);
770 if (blueprint->effect != nullptr) {
771 if (!blueprint->effect->set_vec4(key, v.data())) {
772 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", key.c_str(),
773 v[0], v[1], v[2], v[3]);
776 // TODO: check validity already here, if possible?
777 blueprint->vec4_parameters[key] = v;
782 const luaL_Reg Scene_funcs[] = {
783 { "new", Scene_new },
784 { "__gc", Scene_gc },
785 { "add_input", Scene::add_input },
786 { "add_effect", Scene::add_effect },
787 { "add_optional_effect", Scene::add_optional_effect },
788 { "finalize", Scene::finalize },
792 const luaL_Reg Block_funcs[] = {
793 { "display", Block_display },
794 { "choose_alternative", Block_choose_alternative },
795 { "enable", Block_enable },
796 { "disable", Block_disable },
797 { "set_int", Block_set_int },
798 { "set_float", Block_set_float },
799 { "set_vec3", Block_set_vec3 },
800 { "set_vec4", Block_set_vec4 },
804 const luaL_Reg EffectBlueprint_funcs[] = {
805 // NOTE: No new() function; that's for the individual effects.
806 { "set_int", EffectBlueprint_set_int },
807 { "set_float", EffectBlueprint_set_float },
808 { "set_vec3", EffectBlueprint_set_vec3 },
809 { "set_vec4", EffectBlueprint_set_vec4 },
813 const luaL_Reg EffectChain_funcs[] = {
814 { "new", EffectChain_new },
815 { "__gc", EffectChain_gc },
816 { "add_live_input", EffectChain_add_live_input },
817 { "add_video_input", EffectChain_add_video_input },
819 { "add_html_input", EffectChain_add_html_input },
821 { "add_effect", EffectChain_add_effect },
822 { "finalize", EffectChain_finalize },
826 const luaL_Reg LiveInputWrapper_funcs[] = {
827 { "connect_signal", LiveInputWrapper_connect_signal },
831 const luaL_Reg ImageInput_funcs[] = {
832 { "new", ImageInput_new },
836 const luaL_Reg VideoInput_funcs[] = {
837 { "new", VideoInput_new },
838 { "rewind", VideoInput_rewind },
839 { "disconnect", VideoInput_disconnect },
840 { "change_rate", VideoInput_change_rate },
841 { "get_signal_num", VideoInput_get_signal_num },
845 const luaL_Reg HTMLInput_funcs[] = {
846 { "new", HTMLInput_new },
848 { "set_url", HTMLInput_set_url },
849 { "reload", HTMLInput_reload },
850 { "set_max_fps", HTMLInput_set_max_fps },
851 { "execute_javascript_async", HTMLInput_execute_javascript_async },
852 { "resize", HTMLInput_resize },
853 { "get_signal_num", HTMLInput_get_signal_num },
859 // All of these are solely for new(); the returned metatable will be that of
860 // EffectBlueprint, and Effect (returned from add_effect()) is its own type.
862 const luaL_Reg IdentityEffect_funcs[] = {
863 { "new", IdentityEffect_new },
867 const luaL_Reg WhiteBalanceEffect_funcs[] = {
868 { "new", WhiteBalanceEffect_new },
872 const luaL_Reg ResampleEffect_funcs[] = {
873 { "new", ResampleEffect_new },
877 const luaL_Reg PaddingEffect_funcs[] = {
878 { "new", PaddingEffect_new },
882 const luaL_Reg IntegralPaddingEffect_funcs[] = {
883 { "new", IntegralPaddingEffect_new },
887 const luaL_Reg OverlayEffect_funcs[] = {
888 { "new", OverlayEffect_new },
892 const luaL_Reg ResizeEffect_funcs[] = {
893 { "new", ResizeEffect_new },
897 const luaL_Reg MultiplyEffect_funcs[] = {
898 { "new", MultiplyEffect_new },
902 const luaL_Reg MixEffect_funcs[] = {
903 { "new", MixEffect_new },
907 const luaL_Reg LiftGammaGainEffect_funcs[] = {
908 { "new", LiftGammaGainEffect_new },
914 const luaL_Reg InputStateInfo_funcs[] = {
915 { "get_width", InputStateInfo_get_width },
916 { "get_height", InputStateInfo_get_height },
917 { "get_interlaced", InputStateInfo_get_interlaced },
918 { "get_has_signal", InputStateInfo_get_has_signal },
919 { "get_is_connected", InputStateInfo_get_is_connected },
920 { "get_frame_rate_nom", InputStateInfo_get_frame_rate_nom },
921 { "get_frame_rate_den", InputStateInfo_get_frame_rate_den },
922 { "get_last_subtitle", InputStateInfo_get_last_subtitle },
926 const luaL_Reg ThemeMenu_funcs[] = {
927 { "set", ThemeMenu_set },
933 LiveInputWrapper::LiveInputWrapper(
936 bmusb::PixelFormat pixel_format,
937 bool override_bounce,
939 bool user_connectable)
941 pixel_format(pixel_format),
942 deinterlace(deinterlace),
943 user_connectable(user_connectable)
945 ImageFormat inout_format;
946 inout_format.color_space = COLORSPACE_sRGB;
948 // Gamma curve depends on the input signal, and we don't really get any
949 // indications. A camera would be expected to do Rec. 709, but
950 // I haven't checked if any do in practice. However, computers _do_ output
951 // in sRGB gamma (ie., they don't convert from sRGB to Rec. 709), and
952 // I wouldn't really be surprised if most non-professional cameras do, too.
953 // So we pick sRGB as the least evil here.
954 inout_format.gamma_curve = GAMMA_sRGB;
958 deinterlace_effect = new movit::DeinterlaceEffect();
960 // As per the comments in deinterlace_effect.h, we turn this off.
961 // The most likely interlaced input for us is either a camera
962 // (where it's fine to turn it off) or a laptop (where it _should_
964 CHECK(deinterlace_effect->set_int("enable_spatial_interlacing_check", 0));
966 num_inputs = deinterlace_effect->num_inputs();
967 assert(num_inputs == FRAME_HISTORY_LENGTH);
972 if (pixel_format == bmusb::PixelFormat_8BitBGRA) {
973 for (unsigned i = 0; i < num_inputs; ++i) {
974 // We upload our textures ourselves, and Movit swaps
975 // R and B in the shader if we specify BGRA, so lie and say RGBA.
976 rgba_inputs.push_back(new sRGBSwitchingFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
977 chain->add_input(rgba_inputs.back());
981 vector<Effect *> reverse_inputs(rgba_inputs.rbegin(), rgba_inputs.rend());
982 chain->add_effect(deinterlace_effect, reverse_inputs);
985 assert(pixel_format == bmusb::PixelFormat_8BitYCbCr ||
986 pixel_format == bmusb::PixelFormat_10BitYCbCr ||
987 pixel_format == bmusb::PixelFormat_8BitYCbCrPlanar);
989 // Most of these settings will be overridden later if using PixelFormat_8BitYCbCrPlanar.
990 input_ycbcr_format.chroma_subsampling_x = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1 : 2;
991 input_ycbcr_format.chroma_subsampling_y = 1;
992 input_ycbcr_format.num_levels = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1024 : 256;
993 input_ycbcr_format.cb_x_position = 0.0;
994 input_ycbcr_format.cr_x_position = 0.0;
995 input_ycbcr_format.cb_y_position = 0.5;
996 input_ycbcr_format.cr_y_position = 0.5;
997 input_ycbcr_format.luma_coefficients = YCBCR_REC_709; // Will be overridden later even if not planar.
998 input_ycbcr_format.full_range = false; // Will be overridden later even if not planar.
1000 for (unsigned i = 0; i < num_inputs; ++i) {
1001 // When using 10-bit input, we're converting to interleaved through v210Converter.
1002 YCbCrInputSplitting splitting;
1003 if (pixel_format == bmusb::PixelFormat_10BitYCbCr) {
1004 splitting = YCBCR_INPUT_INTERLEAVED;
1005 } else if (pixel_format == bmusb::PixelFormat_8BitYCbCr) {
1006 splitting = YCBCR_INPUT_SPLIT_Y_AND_CBCR;
1008 splitting = YCBCR_INPUT_PLANAR;
1010 if (override_bounce) {
1011 ycbcr_inputs.push_back(new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
1013 ycbcr_inputs.push_back(new YCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
1015 chain->add_input(ycbcr_inputs.back());
1019 vector<Effect *> reverse_inputs(ycbcr_inputs.rbegin(), ycbcr_inputs.rend());
1020 chain->add_effect(deinterlace_effect, reverse_inputs);
1025 bool LiveInputWrapper::connect_signal(int signal_num)
1027 if (!user_connectable) {
1031 if (global_mixer == nullptr) {
1036 signal_num = theme->map_signal(signal_num);
1037 connect_signal_raw(signal_num, *theme->input_state);
1041 void LiveInputWrapper::connect_signal_raw(int signal_num, const InputState &input_state)
1043 BufferedFrame first_frame = input_state.buffered_frames[signal_num][0];
1044 if (first_frame.frame == nullptr) {
1048 unsigned width, height;
1050 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)first_frame.frame->userdata;
1051 width = userdata->last_width[first_frame.field_number];
1052 height = userdata->last_height[first_frame.field_number];
1053 if (userdata->last_interlaced) {
1058 movit::YCbCrLumaCoefficients ycbcr_coefficients = input_state.ycbcr_coefficients[signal_num];
1059 bool full_range = input_state.full_range[signal_num];
1061 if (input_state.ycbcr_coefficients_auto[signal_num]) {
1064 // The Blackmagic driver docs claim that the device outputs Y'CbCr
1065 // according to Rec. 601, but this seems to indicate the subsampling
1066 // positions only, as they publish Y'CbCr → RGB formulas that are
1067 // different for HD and SD (corresponding to Rec. 709 and 601, respectively),
1068 // and a Lenovo X1 gen 3 I used to test definitely outputs Rec. 709
1069 // (at least up to rounding error). Other devices seem to use Rec. 601
1070 // even on HD resolutions. Nevertheless, Rec. 709 _is_ the right choice
1071 // for HD, so we default to that if the user hasn't set anything.
1072 if (height >= 720) {
1073 ycbcr_coefficients = YCBCR_REC_709;
1075 ycbcr_coefficients = YCBCR_REC_601;
1079 // This is a global, but it doesn't really matter.
1080 input_ycbcr_format.luma_coefficients = ycbcr_coefficients;
1081 input_ycbcr_format.full_range = full_range;
1083 BufferedFrame last_good_frame = first_frame;
1084 for (unsigned i = 0; i < max(ycbcr_inputs.size(), rgba_inputs.size()); ++i) {
1085 BufferedFrame frame = input_state.buffered_frames[signal_num][i];
1086 if (frame.frame == nullptr) {
1087 // Not enough data; reuse last frame (well, field).
1088 // This is suboptimal, but we have nothing better.
1089 frame = last_good_frame;
1091 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
1093 unsigned this_width = userdata->last_width[frame.field_number];
1094 unsigned this_height = userdata->last_height[frame.field_number];
1095 if (this_width != width || this_height != height) {
1096 // Resolution changed; reuse last frame/field.
1097 frame = last_good_frame;
1098 userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
1101 assert(userdata->pixel_format == pixel_format);
1102 switch (pixel_format) {
1103 case bmusb::PixelFormat_8BitYCbCr:
1104 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
1105 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cbcr[frame.field_number]);
1106 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
1107 ycbcr_inputs[i]->set_width(width);
1108 ycbcr_inputs[i]->set_height(height);
1110 case bmusb::PixelFormat_8BitYCbCrPlanar:
1111 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
1112 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cb[frame.field_number]);
1113 ycbcr_inputs[i]->set_texture_num(2, userdata->tex_cr[frame.field_number]);
1114 ycbcr_inputs[i]->change_ycbcr_format(userdata->ycbcr_format);
1115 ycbcr_inputs[i]->set_width(width);
1116 ycbcr_inputs[i]->set_height(height);
1118 case bmusb::PixelFormat_10BitYCbCr:
1119 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_444[frame.field_number]);
1120 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
1121 ycbcr_inputs[i]->set_width(width);
1122 ycbcr_inputs[i]->set_height(height);
1124 case bmusb::PixelFormat_8BitBGRA:
1125 rgba_inputs[i]->set_texture_num(userdata->tex_rgba[frame.field_number]);
1126 rgba_inputs[i]->set_width(width);
1127 rgba_inputs[i]->set_height(height);
1133 last_good_frame = frame;
1137 BufferedFrame frame = input_state.buffered_frames[signal_num][0];
1138 CHECK(deinterlace_effect->set_int("current_field_position", frame.field_number));
1144 int call_num_channels(lua_State *L)
1146 lua_getglobal(L, "num_channels");
1148 if (lua_pcall(L, 0, 1, 0) != 0) {
1149 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
1153 int num_channels = luaL_checknumber(L, 1);
1155 assert(lua_gettop(L) == 0);
1156 return num_channels;
1161 Theme::Theme(const string &filename, const vector<string> &search_dirs, ResourcePool *resource_pool, unsigned num_cards)
1162 : resource_pool(resource_pool), num_cards(num_cards), signal_to_card_mapping(global_flags.default_stream_mapping)
1164 L = luaL_newstate();
1167 // Search through all directories until we find a file that will load
1168 // (as in, does not return LUA_ERRFILE); then run it. We store load errors
1169 // from all the attempts, and show them once we know we can't find any of them.
1171 vector<string> errors;
1172 bool success = false;
1174 vector<string> real_search_dirs;
1175 if (!filename.empty() && filename[0] == '/') {
1176 real_search_dirs.push_back("");
1178 real_search_dirs = search_dirs;
1183 for (const string &dir : real_search_dirs) {
1187 path = dir + "/" + filename;
1189 int err = luaL_loadfile(L, path.c_str());
1191 // Save the theme for when we're actually going to run it
1192 // (we need to set up the right environment below first,
1193 // and we couldn't do that before, because we didn't know the
1194 // path to put in Nageru.THEME_PATH).
1195 theme_code_ref = luaL_ref(L, LUA_REGISTRYINDEX);
1196 assert(lua_gettop(L) == 0);
1201 errors.push_back(lua_tostring(L, -1));
1203 if (err != LUA_ERRFILE) {
1204 // The file actually loaded, but failed to parse somehow. Abort; don't try the next one.
1210 for (const string &error : errors) {
1211 fprintf(stderr, "%s\n", error.c_str());
1215 assert(lua_gettop(L) == 0);
1217 // Make sure the path exposed to the theme (as Nageru.THEME_PATH;
1218 // can be useful for locating files when talking to CEF) is absolute.
1219 // In a sense, it would be nice if realpath() had a mode not to
1220 // resolve symlinks, but it doesn't, so we only call it if we don't
1221 // already have an absolute path (which may leave ../ elements etc.).
1222 if (path[0] == '/') {
1225 char *absolute_theme_path = realpath(path.c_str(), nullptr);
1226 theme_path = absolute_theme_path;
1227 free(absolute_theme_path);
1230 // Set up the API we provide.
1231 register_constants();
1232 register_class("Scene", Scene_funcs);
1233 register_class("Block", Block_funcs);
1234 register_class("EffectBlueprint", EffectBlueprint_funcs);
1235 register_class("EffectChain", EffectChain_funcs);
1236 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
1237 register_class("ImageInput", ImageInput_funcs);
1238 register_class("VideoInput", VideoInput_funcs);
1239 register_class("HTMLInput", HTMLInput_funcs);
1240 register_class("IdentityEffect", IdentityEffect_funcs);
1241 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
1242 register_class("ResampleEffect", ResampleEffect_funcs);
1243 register_class("PaddingEffect", PaddingEffect_funcs);
1244 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
1245 register_class("OverlayEffect", OverlayEffect_funcs);
1246 register_class("ResizeEffect", ResizeEffect_funcs);
1247 register_class("MultiplyEffect", MultiplyEffect_funcs);
1248 register_class("MixEffect", MixEffect_funcs);
1249 register_class("LiftGammaGainEffect", LiftGammaGainEffect_funcs);
1250 register_class("InputStateInfo", InputStateInfo_funcs);
1251 register_class("ThemeMenu", ThemeMenu_funcs);
1253 // Now actually run the theme to get everything set up.
1254 lua_rawgeti(L, LUA_REGISTRYINDEX, theme_code_ref);
1255 luaL_unref(L, LUA_REGISTRYINDEX, theme_code_ref);
1256 if (lua_pcall(L, 0, 0, 0)) {
1257 fprintf(stderr, "Error when running %s: %s\n", path.c_str(), lua_tostring(L, -1));
1260 assert(lua_gettop(L) == 0);
1262 // Ask it for the number of channels.
1263 num_channels = call_num_channels(L);
1271 void Theme::register_constants()
1273 // Set Nageru.VIDEO_FORMAT_BGRA = bmusb::PixelFormat_8BitBGRA, etc.
1274 const vector<pair<string, int>> num_constants = {
1275 { "VIDEO_FORMAT_BGRA", bmusb::PixelFormat_8BitBGRA },
1276 { "VIDEO_FORMAT_YCBCR", bmusb::PixelFormat_8BitYCbCrPlanar },
1278 const vector<pair<string, string>> str_constants = {
1279 { "THEME_PATH", theme_path },
1282 lua_newtable(L); // t = {}
1284 for (const pair<string, int> &constant : num_constants) {
1285 lua_pushstring(L, constant.first.c_str());
1286 lua_pushinteger(L, constant.second);
1287 lua_settable(L, 1); // t[key] = value
1289 for (const pair<string, string> &constant : str_constants) {
1290 lua_pushstring(L, constant.first.c_str());
1291 lua_pushstring(L, constant.second.c_str());
1292 lua_settable(L, 1); // t[key] = value
1295 lua_setglobal(L, "Nageru"); // Nageru = t
1296 assert(lua_gettop(L) == 0);
1299 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
1301 assert(lua_gettop(L) == 0);
1302 luaL_newmetatable(L, class_name); // mt = {}
1303 lua_pushlightuserdata(L, this);
1304 luaL_setfuncs(L, funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
1305 lua_pushvalue(L, -1);
1306 lua_setfield(L, -2, "__index"); // mt.__index = mt
1307 lua_setglobal(L, class_name); // ClassName = mt
1308 assert(lua_gettop(L) == 0);
1311 Theme::Chain Theme::get_chain_from_effect_chain(EffectChain *effect_chain, unsigned num, const InputState &input_state)
1313 if (!lua_isfunction(L, -1)) {
1314 fprintf(stderr, "Argument #-1 should be a function\n");
1317 lua_pushvalue(L, -1);
1318 shared_ptr<LuaRefWithDeleter> funcref(new LuaRefWithDeleter(&m, L, luaL_ref(L, LUA_REGISTRYINDEX)));
1322 chain.chain = effect_chain;
1323 chain.setup_chain = [this, funcref, input_state, effect_chain]{
1324 lock_guard<mutex> lock(m);
1326 assert(this->input_state == nullptr);
1327 this->input_state = &input_state;
1329 // Set up state, including connecting signals.
1330 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref->get());
1331 if (lua_pcall(L, 0, 0, 0) != 0) {
1332 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
1335 assert(lua_gettop(L) == 0);
1337 // The theme can't (or at least shouldn't!) call connect_signal() on
1338 // each FFmpeg or CEF input, so we'll do it here.
1339 if (video_signal_connections.count(effect_chain)) {
1340 for (const VideoSignalConnection &conn : video_signal_connections[effect_chain]) {
1341 conn.wrapper->connect_signal_raw(conn.source->get_card_index(), input_state);
1345 if (html_signal_connections.count(effect_chain)) {
1346 for (const CEFSignalConnection &conn : html_signal_connections[effect_chain]) {
1347 conn.wrapper->connect_signal_raw(conn.source->get_card_index(), input_state);
1352 this->input_state = nullptr;
1357 Theme::Chain Theme::get_chain(unsigned num, float t, unsigned width, unsigned height, const InputState &input_state)
1359 const char *func_name = "get_scene"; // For error reporting.
1362 lock_guard<mutex> lock(m);
1363 assert(lua_gettop(L) == 0);
1364 lua_getglobal(L, "get_scene"); /* function to be called */
1365 if (lua_isnil(L, -1)) {
1366 // Try the pre-1.9.0 name for compatibility.
1368 lua_getglobal(L, "get_chain");
1369 func_name = "get_chain";
1371 lua_pushnumber(L, num);
1372 lua_pushnumber(L, t);
1373 lua_pushnumber(L, width);
1374 lua_pushnumber(L, height);
1375 wrap_lua_object<InputStateInfo>(L, "InputStateInfo", input_state);
1377 if (lua_pcall(L, 5, LUA_MULTRET, 0) != 0) {
1378 fprintf(stderr, "error running function “%s”: %s\n", func_name, lua_tostring(L, -1));
1382 if (luaL_testudata(L, -1, "Scene") != nullptr) {
1383 if (lua_gettop(L) != 1) {
1384 luaL_error(L, "%s() for chain number %d returned an Scene, but also other items", func_name);
1386 Scene *auto_effect_chain = (Scene *)luaL_testudata(L, -1, "Scene");
1387 auto chain_and_setup = auto_effect_chain->get_chain(this, L, num, input_state);
1388 chain.chain = chain_and_setup.first;
1389 chain.setup_chain = move(chain_and_setup.second);
1390 } else if (luaL_testudata(L, -2, "EffectChain") != nullptr) {
1391 // Old-style (pre-Nageru 1.9.0) return of a single chain and prepare function.
1392 if (lua_gettop(L) != 2) {
1393 luaL_error(L, "%s() for chain number %d returned an EffectChain, but needs to also return a prepare function (or use Scene)", func_name);
1395 EffectChain *effect_chain = (EffectChain *)luaL_testudata(L, -2, "EffectChain");
1396 chain = get_chain_from_effect_chain(effect_chain, num, input_state);
1398 luaL_error(L, "%s() for chain number %d did not return an EffectChain or Scene\n", func_name, num);
1400 assert(lua_gettop(L) == 0);
1402 // TODO: Can we do better, e.g. by running setup_chain() and seeing what it references?
1403 // Actually, setup_chain does maybe hold all the references we need now anyway?
1404 chain.input_frames.reserve(num_cards * FRAME_HISTORY_LENGTH);
1405 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
1406 for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
1407 chain.input_frames.push_back(input_state.buffered_frames[card_index][frame_num].frame);
1414 string Theme::get_channel_name(unsigned channel)
1416 lock_guard<mutex> lock(m);
1417 lua_getglobal(L, "channel_name");
1418 lua_pushnumber(L, channel);
1419 if (lua_pcall(L, 1, 1, 0) != 0) {
1420 fprintf(stderr, "error running function `channel_name': %s\n", lua_tostring(L, -1));
1423 const char *ret = lua_tostring(L, -1);
1424 if (ret == nullptr) {
1425 fprintf(stderr, "function `channel_name' returned nil for channel %d\n", channel);
1429 string retstr = ret;
1431 assert(lua_gettop(L) == 0);
1435 int Theme::get_channel_signal(unsigned channel)
1437 lock_guard<mutex> lock(m);
1438 lua_getglobal(L, "channel_signal");
1439 lua_pushnumber(L, channel);
1440 if (lua_pcall(L, 1, 1, 0) != 0) {
1441 fprintf(stderr, "error running function `channel_signal': %s\n", lua_tostring(L, -1));
1445 int ret = luaL_checknumber(L, 1);
1447 assert(lua_gettop(L) == 0);
1451 std::string Theme::get_channel_color(unsigned channel)
1453 lock_guard<mutex> lock(m);
1454 lua_getglobal(L, "channel_color");
1455 lua_pushnumber(L, channel);
1456 if (lua_pcall(L, 1, 1, 0) != 0) {
1457 fprintf(stderr, "error running function `channel_color': %s\n", lua_tostring(L, -1));
1461 const char *ret = lua_tostring(L, -1);
1462 if (ret == nullptr) {
1463 fprintf(stderr, "function `channel_color' returned nil for channel %d\n", channel);
1467 string retstr = ret;
1469 assert(lua_gettop(L) == 0);
1473 bool Theme::get_supports_set_wb(unsigned channel)
1475 lock_guard<mutex> lock(m);
1476 lua_getglobal(L, "supports_set_wb");
1477 lua_pushnumber(L, channel);
1478 if (lua_pcall(L, 1, 1, 0) != 0) {
1479 fprintf(stderr, "error running function `supports_set_wb': %s\n", lua_tostring(L, -1));
1483 bool ret = checkbool(L, -1);
1485 assert(lua_gettop(L) == 0);
1489 void Theme::set_wb(unsigned channel, double r, double g, double b)
1491 lock_guard<mutex> lock(m);
1492 lua_getglobal(L, "set_wb");
1493 lua_pushnumber(L, channel);
1494 lua_pushnumber(L, r);
1495 lua_pushnumber(L, g);
1496 lua_pushnumber(L, b);
1497 if (lua_pcall(L, 4, 0, 0) != 0) {
1498 fprintf(stderr, "error running function `set_wb': %s\n", lua_tostring(L, -1));
1502 assert(lua_gettop(L) == 0);
1505 vector<string> Theme::get_transition_names(float t)
1507 lock_guard<mutex> lock(m);
1508 lua_getglobal(L, "get_transitions");
1509 lua_pushnumber(L, t);
1510 if (lua_pcall(L, 1, 1, 0) != 0) {
1511 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
1517 while (lua_next(L, -2) != 0) {
1518 ret.push_back(lua_tostring(L, -1));
1522 assert(lua_gettop(L) == 0);
1526 int Theme::map_signal(int signal_num)
1528 // Negative numbers map to raw signals.
1529 if (signal_num < 0) {
1530 return -1 - signal_num;
1533 lock_guard<mutex> lock(map_m);
1534 if (signal_to_card_mapping.count(signal_num)) {
1535 return signal_to_card_mapping[signal_num];
1539 if (global_flags.output_card != -1 && num_cards > 1) {
1540 // Try to exclude the output card from the default card_index.
1541 card_index = signal_num % (num_cards - 1);
1542 if (card_index >= global_flags.output_card) {
1545 if (signal_num >= int(num_cards - 1)) {
1546 print_warning(L, "Theme asked for input %d, but we only have %u input card(s) (card %d is busy with output).\n",
1547 signal_num, num_cards - 1, global_flags.output_card);
1548 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1551 card_index = signal_num % num_cards;
1552 if (signal_num >= int(num_cards)) {
1553 print_warning(L, "Theme asked for input %d, but we only have %u card(s).\n", signal_num, num_cards);
1554 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1557 signal_to_card_mapping[signal_num] = card_index;
1561 void Theme::set_signal_mapping(int signal_num, int card_num)
1563 lock_guard<mutex> lock(map_m);
1564 assert(card_num < int(num_cards));
1565 signal_to_card_mapping[signal_num] = card_num;
1568 void Theme::transition_clicked(int transition_num, float t)
1570 lock_guard<mutex> lock(m);
1571 lua_getglobal(L, "transition_clicked");
1572 lua_pushnumber(L, transition_num);
1573 lua_pushnumber(L, t);
1575 if (lua_pcall(L, 2, 0, 0) != 0) {
1576 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
1579 assert(lua_gettop(L) == 0);
1582 void Theme::channel_clicked(int preview_num)
1584 lock_guard<mutex> lock(m);
1585 lua_getglobal(L, "channel_clicked");
1586 lua_pushnumber(L, preview_num);
1588 if (lua_pcall(L, 1, 0, 0) != 0) {
1589 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
1592 assert(lua_gettop(L) == 0);
1595 int Theme::set_theme_menu(lua_State *L)
1597 for (const Theme::MenuEntry &entry : theme_menu) {
1598 luaL_unref(L, LUA_REGISTRYINDEX, entry.lua_ref);
1602 int num_elements = lua_gettop(L);
1603 for (int i = 1; i <= num_elements; ++i) {
1604 lua_rawgeti(L, i, 1);
1605 const string text = checkstdstring(L, -1);
1608 lua_rawgeti(L, i, 2);
1609 luaL_checktype(L, -1, LUA_TFUNCTION);
1610 int ref = luaL_ref(L, LUA_REGISTRYINDEX);
1612 theme_menu.push_back(MenuEntry{ text, ref });
1614 lua_pop(L, num_elements);
1615 assert(lua_gettop(L) == 0);
1617 if (theme_menu_callback != nullptr) {
1618 theme_menu_callback();
1624 void Theme::theme_menu_entry_clicked(int lua_ref)
1626 lock_guard<mutex> lock(m);
1627 lua_rawgeti(L, LUA_REGISTRYINDEX, lua_ref);
1628 if (lua_pcall(L, 0, 0, 0) != 0) {
1629 fprintf(stderr, "error running menu callback: %s\n", lua_tostring(L, -1));