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>
32 #include "audio_mixer.h"
35 #include "cef_capture.h"
37 #include "ffmpeg_capture.h"
39 #include "image_input.h"
40 #include "input_state.h"
41 #include "lua_utils.h"
42 #include "mainwindow.h"
43 #include "pbo_frame_allocator.h"
53 using namespace movit;
55 extern Mixer *global_mixer;
57 constexpr unsigned Theme::MenuEntry::CHECKABLE;
58 constexpr unsigned Theme::MenuEntry::CHECKED;
60 Theme *get_theme_updata(lua_State* L)
62 luaL_checktype(L, lua_upvalueindex(1), LUA_TLIGHTUSERDATA);
63 return (Theme *)lua_touserdata(L, lua_upvalueindex(1));
66 void print_warning(lua_State* L, const char *format, ...)
71 vsnprintf(buf, sizeof(buf), format, ap);
75 lua_getstack(L, 1, &ar);
76 lua_getinfo(L, "nSl", &ar);
77 fprintf(stderr, "WARNING: %s:%d: %s", ar.source, ar.currentline, buf);
80 int ThemeMenu_set(lua_State *L)
82 Theme *theme = get_theme_updata(L);
83 return theme->set_theme_menu(L);
86 InputStateInfo::InputStateInfo(const InputState &input_state)
88 for (unsigned signal_num = 0; signal_num < MAX_VIDEO_CARDS; ++signal_num) {
89 BufferedFrame frame = input_state.buffered_frames[signal_num][0];
90 if (frame.frame == nullptr) {
91 last_width[signal_num] = last_height[signal_num] = 0;
92 last_interlaced[signal_num] = false;
93 last_has_signal[signal_num] = false;
94 last_is_connected[signal_num] = false;
97 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
98 last_width[signal_num] = userdata->last_width[frame.field_number];
99 last_height[signal_num] = userdata->last_height[frame.field_number];
100 last_interlaced[signal_num] = userdata->last_interlaced;
101 last_has_signal[signal_num] = userdata->last_has_signal;
102 last_is_connected[signal_num] = userdata->last_is_connected;
103 last_frame_rate_nom[signal_num] = userdata->last_frame_rate_nom;
104 last_frame_rate_den[signal_num] = userdata->last_frame_rate_den;
105 last_pixel_format[signal_num] = userdata->pixel_format;
106 has_last_subtitle[signal_num] = userdata->has_last_subtitle;
107 last_subtitle[signal_num] = userdata->last_subtitle;
111 // An effect that does nothing.
112 class IdentityEffect : public Effect {
115 string effect_type_id() const override { return "IdentityEffect"; }
116 string output_fragment_shader() override { return read_file("identity.frag"); }
119 Effect *instantiate_effect(EffectChain *chain, EffectType effect_type)
121 switch (effect_type) {
122 case IDENTITY_EFFECT:
123 return new IdentityEffect;
124 case WHITE_BALANCE_EFFECT:
125 case AUTO_WHITE_BALANCE_EFFECT:
126 return new WhiteBalanceEffect;
127 case RESAMPLE_EFFECT:
128 return new ResampleEffect;
130 return new PaddingEffect;
131 case INTEGRAL_PADDING_EFFECT:
132 return new IntegralPaddingEffect;
134 return new OverlayEffect;
136 return new ResizeEffect;
137 case MULTIPLY_EFFECT:
138 return new MultiplyEffect;
140 return new MixEffect;
141 case LIFT_GAMMA_GAIN_EFFECT:
142 return new LiftGammaGainEffect;
144 fprintf(stderr, "Unhandled effect type %d\n", effect_type);
151 Effect *get_effect_from_blueprint(EffectChain *chain, lua_State *L, int idx)
153 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, idx, "EffectBlueprint");
154 if (blueprint->effect != nullptr) {
155 luaL_error(L, "An effect can currently only be added to one chain.\n");
158 Effect *effect = instantiate_effect(chain, blueprint->effect_type);
160 // Set the parameters that were deferred earlier.
161 for (const auto &kv : blueprint->int_parameters) {
162 if (!effect->set_int(kv.first, kv.second)) {
163 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", kv.first.c_str(), kv.second);
166 for (const auto &kv : blueprint->float_parameters) {
167 if (!effect->set_float(kv.first, kv.second)) {
168 luaL_error(L, "Effect refused set_float(\"%s\", %f) (invalid key?)", kv.first.c_str(), kv.second);
171 for (const auto &kv : blueprint->vec3_parameters) {
172 if (!effect->set_vec3(kv.first, kv.second.data())) {
173 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", kv.first.c_str(),
174 kv.second[0], kv.second[1], kv.second[2]);
177 for (const auto &kv : blueprint->vec4_parameters) {
178 if (!effect->set_vec4(kv.first, kv.second.data())) {
179 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", kv.first.c_str(),
180 kv.second[0], kv.second[1], kv.second[2], kv.second[3]);
183 blueprint->effect = effect;
187 InputStateInfo *get_input_state_info(lua_State *L, int idx)
189 if (luaL_testudata(L, idx, "InputStateInfo")) {
190 return (InputStateInfo *)lua_touserdata(L, idx);
192 luaL_error(L, "Error: Index #%d was not InputStateInfo\n", idx);
198 bool checkbool(lua_State* L, int idx)
200 luaL_checktype(L, idx, LUA_TBOOLEAN);
201 return lua_toboolean(L, idx);
204 string checkstdstring(lua_State *L, int index)
207 const char* cstr = lua_tolstring(L, index, &len);
208 return string(cstr, len);
213 int Scene_new(lua_State* L)
215 assert(lua_gettop(L) == 2);
216 Theme *theme = get_theme_updata(L);
217 int aspect_w = luaL_checknumber(L, 1);
218 int aspect_h = luaL_checknumber(L, 2);
220 return wrap_lua_object<Scene>(L, "Scene", theme, aspect_w, aspect_h);
223 int Scene_gc(lua_State* L)
225 assert(lua_gettop(L) == 1);
226 Scene *chain = (Scene *)luaL_checkudata(L, 1, "Scene");
233 void add_outputs_and_finalize(EffectChain *chain, bool is_main_chain)
235 // Add outputs as needed.
236 // NOTE: If you change any details about the output format, you will need to
237 // also update what's given to the muxer (HTTPD::Mux constructor) and
238 // what's put in the H.264 stream (sps_rbsp()).
239 ImageFormat inout_format;
240 inout_format.color_space = COLORSPACE_REC_709;
242 // Output gamma is tricky. We should output Rec. 709 for TV, except that
243 // we expect to run with web players and others that don't really care and
244 // just output with no conversion. So that means we'll need to output sRGB,
245 // even though H.264 has no setting for that (we use “unspecified”).
246 inout_format.gamma_curve = GAMMA_sRGB;
249 YCbCrFormat output_ycbcr_format;
250 // We actually output 4:2:0 and/or 4:2:2 in the end, but chroma subsampling
251 // happens in a pass not run by Movit (see ChromaSubsampler::subsample_chroma()).
252 output_ycbcr_format.chroma_subsampling_x = 1;
253 output_ycbcr_format.chroma_subsampling_y = 1;
255 // This will be overridden if HDMI/SDI output is in force.
256 if (global_flags.ycbcr_rec709_coefficients) {
257 output_ycbcr_format.luma_coefficients = YCBCR_REC_709;
259 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
262 output_ycbcr_format.full_range = false;
263 output_ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
265 GLenum type = global_flags.x264_bit_depth > 8 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_BYTE;
267 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR, type);
269 // If we're using zerocopy video encoding (so the destination
270 // Y texture is owned by VA-API and will be unavailable for
271 // display), add a copy, where we'll only be using the Y component.
272 if (global_flags.use_zerocopy) {
273 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.
275 chain->set_dither_bits(global_flags.x264_bit_depth > 8 ? 16 : 8);
276 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
278 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
286 int EffectChain_new(lua_State* L)
288 assert(lua_gettop(L) == 2);
289 Theme *theme = get_theme_updata(L);
290 int aspect_w = luaL_checknumber(L, 1);
291 int aspect_h = luaL_checknumber(L, 2);
293 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h, theme->get_resource_pool());
296 int EffectChain_gc(lua_State* L)
298 assert(lua_gettop(L) == 1);
299 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
300 chain->~EffectChain();
304 int EffectChain_add_live_input(lua_State* L)
306 assert(lua_gettop(L) == 3);
307 Theme *theme = get_theme_updata(L);
308 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
309 bool override_bounce = checkbool(L, 2);
310 bool deinterlace = checkbool(L, 3);
311 bmusb::PixelFormat pixel_format = global_flags.ten_bit_input ? bmusb::PixelFormat_10BitYCbCr : bmusb::PixelFormat_8BitYCbCr;
313 // Needs to be nonowned to match add_video_input (see below).
314 return wrap_lua_object_nonowned<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain, pixel_format, override_bounce, deinterlace, /*user_connectable=*/true);
317 int EffectChain_add_video_input(lua_State* L)
319 assert(lua_gettop(L) == 3);
320 Theme *theme = get_theme_updata(L);
321 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
322 FFmpegCapture **capture = (FFmpegCapture **)luaL_checkudata(L, 2, "VideoInput");
323 bool deinterlace = checkbool(L, 3);
325 // These need to be nonowned, so that the LiveInputWrapper still exists
326 // and can feed frames to the right EffectChain even if the Lua code
327 // doesn't care about the object anymore. (If we change this, we'd need
328 // to also unregister the signal connection on __gc.)
329 int ret = wrap_lua_object_nonowned<LiveInputWrapper>(
330 L, "LiveInputWrapper", theme, chain, (*capture)->get_current_pixel_format(),
331 /*override_bounce=*/false, deinterlace, /*user_connectable=*/false);
333 Theme *theme = get_theme_updata(L);
334 LiveInputWrapper **live_input = (LiveInputWrapper **)lua_touserdata(L, -1);
335 theme->register_video_signal_connection(chain, *live_input, *capture);
341 int EffectChain_add_html_input(lua_State* L)
343 assert(lua_gettop(L) == 2);
344 Theme *theme = get_theme_updata(L);
345 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
346 CEFCapture **capture = (CEFCapture **)luaL_checkudata(L, 2, "HTMLInput");
348 // These need to be nonowned, so that the LiveInputWrapper still exists
349 // and can feed frames to the right EffectChain even if the Lua code
350 // doesn't care about the object anymore. (If we change this, we'd need
351 // to also unregister the signal connection on __gc.)
352 int ret = wrap_lua_object_nonowned<LiveInputWrapper>(
353 L, "LiveInputWrapper", theme, chain, (*capture)->get_current_pixel_format(),
354 /*override_bounce=*/false, /*deinterlace=*/false, /*user_connectable=*/false);
356 Theme *theme = get_theme_updata(L);
357 LiveInputWrapper **live_input = (LiveInputWrapper **)lua_touserdata(L, -1);
358 theme->register_html_signal_connection(chain, *live_input, *capture);
364 int EffectChain_add_effect(lua_State* L)
366 assert(lua_gettop(L) >= 2);
367 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
369 // TODO: Better error reporting.
371 if (luaL_testudata(L, 2, "ImageInput")) {
372 effect = *(ImageInput **)luaL_checkudata(L, 2, "ImageInput");
374 effect = get_effect_from_blueprint(chain, L, 2);
376 if (lua_gettop(L) == 2) {
377 if (effect->num_inputs() == 0) {
378 chain->add_input((Input *)effect);
380 chain->add_effect(effect);
383 vector<Effect *> inputs;
384 for (int idx = 3; idx <= lua_gettop(L); ++idx) {
385 if (luaL_testudata(L, idx, "LiveInputWrapper")) {
386 LiveInputWrapper **input = (LiveInputWrapper **)lua_touserdata(L, idx);
387 inputs.push_back((*input)->get_effect());
388 } else if (luaL_testudata(L, idx, "ImageInput")) {
389 ImageInput *image = *(ImageInput **)luaL_checkudata(L, idx, "ImageInput");
390 inputs.push_back(image);
392 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, idx, "EffectBlueprint");
393 assert(blueprint->effect != nullptr); // Parent must be added to the graph.
394 inputs.push_back(blueprint->effect);
397 chain->add_effect(effect, inputs);
400 lua_settop(L, 2); // Return the effect itself.
402 // Make sure Lua doesn't garbage-collect it away.
403 lua_pushvalue(L, -1);
404 luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak?
409 int EffectChain_finalize(lua_State* L)
411 assert(lua_gettop(L) == 2);
412 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
413 bool is_main_chain = checkbool(L, 2);
414 add_outputs_and_finalize(chain, is_main_chain);
418 int LiveInputWrapper_connect_signal(lua_State* L)
420 assert(lua_gettop(L) == 2);
421 LiveInputWrapper **input = (LiveInputWrapper **)luaL_checkudata(L, 1, "LiveInputWrapper");
422 int signal_num = luaL_checknumber(L, 2);
423 bool success = (*input)->connect_signal(signal_num);
425 print_warning(L, "Calling connect_signal() on a video or HTML input. Ignoring.\n");
430 int ImageInput_new(lua_State* L)
432 assert(lua_gettop(L) == 1);
433 string filename = checkstdstring(L, 1);
434 return wrap_lua_object_nonowned<ImageInput>(L, "ImageInput", filename);
437 int VideoInput_new(lua_State* L)
439 assert(lua_gettop(L) == 2);
440 string filename = checkstdstring(L, 1);
441 int pixel_format = luaL_checknumber(L, 2);
442 if (pixel_format != bmusb::PixelFormat_8BitYCbCrPlanar &&
443 pixel_format != bmusb::PixelFormat_8BitBGRA) {
444 print_warning(L, "Invalid enum %d used for video format, choosing Y'CbCr.\n", pixel_format);
445 pixel_format = bmusb::PixelFormat_8BitYCbCrPlanar;
447 int ret = wrap_lua_object_nonowned<FFmpegCapture>(L, "VideoInput", filename, global_flags.width, global_flags.height);
449 FFmpegCapture **capture = (FFmpegCapture **)lua_touserdata(L, -1);
450 (*capture)->set_pixel_format(bmusb::PixelFormat(pixel_format));
452 Theme *theme = get_theme_updata(L);
453 theme->register_video_input(*capture);
458 int VideoInput_rewind(lua_State* L)
460 assert(lua_gettop(L) == 1);
461 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
462 (*video_input)->rewind();
466 int VideoInput_disconnect(lua_State* L)
468 assert(lua_gettop(L) == 1);
469 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
470 (*video_input)->disconnect();
474 int VideoInput_change_rate(lua_State* L)
476 assert(lua_gettop(L) == 2);
477 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
478 double new_rate = luaL_checknumber(L, 2);
479 (*video_input)->change_rate(new_rate);
483 int VideoInput_get_signal_num(lua_State* L)
485 assert(lua_gettop(L) == 1);
486 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
487 lua_pushnumber(L, -1 - (*video_input)->get_card_index());
491 int HTMLInput_new(lua_State* L)
494 assert(lua_gettop(L) == 1);
495 string url = checkstdstring(L, 1);
496 int ret = wrap_lua_object_nonowned<CEFCapture>(L, "HTMLInput", url, global_flags.width, global_flags.height);
498 CEFCapture **capture = (CEFCapture **)lua_touserdata(L, -1);
499 Theme *theme = get_theme_updata(L);
500 theme->register_html_input(*capture);
504 fprintf(stderr, "This version of Nageru has been compiled without CEF support.\n");
505 fprintf(stderr, "HTMLInput is not available.\n");
511 int HTMLInput_set_url(lua_State* L)
513 assert(lua_gettop(L) == 2);
514 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
515 string new_url = checkstdstring(L, 2);
516 (*video_input)->set_url(new_url);
520 int HTMLInput_reload(lua_State* L)
522 assert(lua_gettop(L) == 1);
523 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
524 (*video_input)->reload();
528 int HTMLInput_set_max_fps(lua_State* L)
530 assert(lua_gettop(L) == 2);
531 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
532 int max_fps = lrint(luaL_checknumber(L, 2));
533 (*video_input)->set_max_fps(max_fps);
537 int HTMLInput_execute_javascript_async(lua_State* L)
539 assert(lua_gettop(L) == 2);
540 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
541 string js = checkstdstring(L, 2);
542 (*video_input)->execute_javascript_async(js);
546 int HTMLInput_resize(lua_State* L)
548 assert(lua_gettop(L) == 3);
549 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
550 unsigned width = lrint(luaL_checknumber(L, 2));
551 unsigned height = lrint(luaL_checknumber(L, 3));
552 (*video_input)->resize(width, height);
556 int HTMLInput_get_signal_num(lua_State* L)
558 assert(lua_gettop(L) == 1);
559 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
560 lua_pushnumber(L, -1 - (*video_input)->get_card_index());
565 int IdentityEffect_new(lua_State* L)
567 assert(lua_gettop(L) == 0);
568 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", IDENTITY_EFFECT);
571 int WhiteBalanceEffect_new(lua_State* L)
573 assert(lua_gettop(L) == 0);
574 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", WHITE_BALANCE_EFFECT);
577 int ResampleEffect_new(lua_State* L)
579 assert(lua_gettop(L) == 0);
580 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", RESAMPLE_EFFECT);
583 int PaddingEffect_new(lua_State* L)
585 assert(lua_gettop(L) == 0);
586 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", PADDING_EFFECT);
589 int IntegralPaddingEffect_new(lua_State* L)
591 assert(lua_gettop(L) == 0);
592 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", INTEGRAL_PADDING_EFFECT);
595 int OverlayEffect_new(lua_State* L)
597 assert(lua_gettop(L) == 0);
598 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", OVERLAY_EFFECT);
601 int ResizeEffect_new(lua_State* L)
603 assert(lua_gettop(L) == 0);
604 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", RESIZE_EFFECT);
607 int MultiplyEffect_new(lua_State* L)
609 assert(lua_gettop(L) == 0);
610 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", MULTIPLY_EFFECT);
613 int MixEffect_new(lua_State* L)
615 assert(lua_gettop(L) == 0);
616 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", MIX_EFFECT);
619 int LiftGammaGainEffect_new(lua_State* L)
621 assert(lua_gettop(L) == 0);
622 return wrap_lua_object_nonowned<EffectBlueprint>(L, "EffectBlueprint", LIFT_GAMMA_GAIN_EFFECT);
625 int InputStateInfo_get_width(lua_State* L)
627 assert(lua_gettop(L) == 2);
628 InputStateInfo *input_state_info = get_input_state_info(L, 1);
630 Theme *theme = get_theme_updata(L);
631 int card_idx = theme->map_signal_to_card(luaL_checknumber(L, 2));
632 lua_pushnumber(L, input_state_info->last_width[card_idx]);
636 int InputStateInfo_get_height(lua_State* L)
638 assert(lua_gettop(L) == 2);
639 InputStateInfo *input_state_info = get_input_state_info(L, 1);
640 Theme *theme = get_theme_updata(L);
641 int card_idx = theme->map_signal_to_card(luaL_checknumber(L, 2));
642 lua_pushnumber(L, input_state_info->last_height[card_idx]);
646 int InputStateInfo_get_frame_height(lua_State* L)
648 assert(lua_gettop(L) == 2);
649 InputStateInfo *input_state_info = get_input_state_info(L, 1);
650 Theme *theme = get_theme_updata(L);
651 int card_idx = theme->map_signal_to_card(luaL_checknumber(L, 2));
652 unsigned height = input_state_info->last_height[card_idx];
653 if (input_state_info->last_interlaced[card_idx]) {
656 lua_pushnumber(L, height);
660 int InputStateInfo_get_interlaced(lua_State* L)
662 assert(lua_gettop(L) == 2);
663 InputStateInfo *input_state_info = get_input_state_info(L, 1);
664 Theme *theme = get_theme_updata(L);
665 int card_idx = theme->map_signal_to_card(luaL_checknumber(L, 2));
666 lua_pushboolean(L, input_state_info->last_interlaced[card_idx]);
670 int InputStateInfo_get_has_signal(lua_State* L)
672 assert(lua_gettop(L) == 2);
673 InputStateInfo *input_state_info = get_input_state_info(L, 1);
674 Theme *theme = get_theme_updata(L);
675 int card_idx = theme->map_signal_to_card(luaL_checknumber(L, 2));
676 lua_pushboolean(L, input_state_info->last_has_signal[card_idx]);
680 int InputStateInfo_get_is_connected(lua_State* L)
682 assert(lua_gettop(L) == 2);
683 InputStateInfo *input_state_info = get_input_state_info(L, 1);
684 Theme *theme = get_theme_updata(L);
685 int card_idx = theme->map_signal_to_card(luaL_checknumber(L, 2));
686 lua_pushboolean(L, input_state_info->last_is_connected[card_idx]);
690 int InputStateInfo_get_frame_rate_nom(lua_State* L)
692 assert(lua_gettop(L) == 2);
693 InputStateInfo *input_state_info = get_input_state_info(L, 1);
694 Theme *theme = get_theme_updata(L);
695 int card_idx = theme->map_signal_to_card(luaL_checknumber(L, 2));
696 lua_pushnumber(L, input_state_info->last_frame_rate_nom[card_idx]);
700 int InputStateInfo_get_frame_rate_den(lua_State* L)
702 assert(lua_gettop(L) == 2);
703 InputStateInfo *input_state_info = get_input_state_info(L, 1);
704 Theme *theme = get_theme_updata(L);
705 int card_idx = theme->map_signal_to_card(luaL_checknumber(L, 2));
706 lua_pushnumber(L, input_state_info->last_frame_rate_den[card_idx]);
710 int InputStateInfo_get_last_subtitle(lua_State* L)
712 assert(lua_gettop(L) == 2);
713 InputStateInfo *input_state_info = get_input_state_info(L, 1);
714 Theme *theme = get_theme_updata(L);
715 int card_idx = theme->map_signal_to_card(luaL_checknumber(L, 2));
716 if (!input_state_info->has_last_subtitle[card_idx]) {
719 lua_pushstring(L, input_state_info->last_subtitle[card_idx].c_str());
726 // Helper function to write e.g. “60” or “59.94”.
727 string format_frame_rate(int nom, int den)
730 if (nom % den == 0) {
731 snprintf(buf, sizeof(buf), "%d", nom / den);
733 snprintf(buf, sizeof(buf), "%.2f", double(nom) / den);
738 // Helper function to write e.g. “720p60”.
739 string get_human_readable_resolution(const InputStateInfo *input_state_info, int signal_num)
742 if (input_state_info->last_interlaced[signal_num]) {
743 snprintf(buf, sizeof(buf), "%di", input_state_info->last_height[signal_num] * 2);
745 // Show field rate instead of frame rate; really for cosmetics only
746 // (and actually contrary to EBU recommendations, although in line
747 // with typical user expectations).
748 return buf + format_frame_rate(input_state_info->last_frame_rate_nom[signal_num] * 2,
749 input_state_info->last_frame_rate_den[signal_num]);
751 snprintf(buf, sizeof(buf), "%dp", input_state_info->last_height[signal_num]);
752 return buf + format_frame_rate(input_state_info->last_frame_rate_nom[signal_num],
753 input_state_info->last_frame_rate_den[signal_num]);
759 int InputStateInfo_get_human_readable_resolution(lua_State* L)
761 assert(lua_gettop(L) == 2);
762 InputStateInfo *input_state_info = get_input_state_info(L, 1);
763 Theme *theme = get_theme_updata(L);
764 int card_idx = theme->map_signal_to_card(luaL_checknumber(L, 2));
767 if (!input_state_info->last_is_connected[card_idx]) {
768 str = "disconnected";
769 } else if (input_state_info->last_height[card_idx] <= 0) {
771 } else if (!input_state_info->last_has_signal[card_idx]) {
772 if (input_state_info->last_height[card_idx] == 525) {
773 // Special mode for the USB3 cards.
776 str = get_human_readable_resolution(input_state_info, card_idx) + ", no signal";
779 str = get_human_readable_resolution(input_state_info, card_idx);
782 lua_pushstring(L, str.c_str());
787 int EffectBlueprint_set_int(lua_State *L)
789 assert(lua_gettop(L) == 3);
790 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
791 string key = checkstdstring(L, 2);
792 float value = luaL_checknumber(L, 3);
793 if (blueprint->effect != nullptr) {
794 if (!blueprint->effect->set_int(key, value)) {
795 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
798 // TODO: check validity already here, if possible?
799 blueprint->int_parameters[key] = value;
804 int EffectBlueprint_set_float(lua_State *L)
806 assert(lua_gettop(L) == 3);
807 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
808 string key = checkstdstring(L, 2);
809 float value = luaL_checknumber(L, 3);
810 if (blueprint->effect != nullptr) {
811 if (!blueprint->effect->set_float(key, value)) {
812 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
815 // TODO: check validity already here, if possible?
816 blueprint->float_parameters[key] = value;
821 int EffectBlueprint_set_vec3(lua_State *L)
823 assert(lua_gettop(L) == 5);
824 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
825 string key = checkstdstring(L, 2);
827 v[0] = luaL_checknumber(L, 3);
828 v[1] = luaL_checknumber(L, 4);
829 v[2] = luaL_checknumber(L, 5);
831 if (blueprint->effect != nullptr) {
832 if (!blueprint->effect->set_vec3(key, v.data())) {
833 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", key.c_str(),
837 // TODO: check validity already here, if possible?
838 blueprint->vec3_parameters[key] = v;
844 int EffectBlueprint_set_vec4(lua_State *L)
846 assert(lua_gettop(L) == 6);
847 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
848 string key = checkstdstring(L, 2);
850 v[0] = luaL_checknumber(L, 3);
851 v[1] = luaL_checknumber(L, 4);
852 v[2] = luaL_checknumber(L, 5);
853 v[3] = luaL_checknumber(L, 6);
854 if (blueprint->effect != nullptr) {
855 if (!blueprint->effect->set_vec4(key, v.data())) {
856 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", key.c_str(),
857 v[0], v[1], v[2], v[3]);
860 // TODO: check validity already here, if possible?
861 blueprint->vec4_parameters[key] = v;
866 const luaL_Reg Scene_funcs[] = {
867 { "new", Scene_new },
868 { "__gc", Scene_gc },
869 { "add_input", Scene::add_input },
870 { "add_white_balance", Scene::add_white_balance },
871 { "add_effect", Scene::add_effect },
872 { "add_optional_effect", Scene::add_optional_effect },
873 { "finalize", Scene::finalize },
877 const luaL_Reg Block_funcs[] = {
878 { "display", Block_display },
879 { "choose", Block_choose },
880 { "enable", Block_enable },
881 { "enable_if", Block_enable_if },
882 { "disable", Block_disable },
883 { "always_disable_if_disabled", Block_always_disable_if_disabled },
884 { "promise_to_disable_if_enabled", Block_promise_to_disable_if_enabled },
885 { "set_int", Block_set_int },
886 { "set_float", Block_set_float },
887 { "set_vec3", Block_set_vec3 },
888 { "set_vec4", Block_set_vec4 },
892 const luaL_Reg EffectBlueprint_funcs[] = {
893 // NOTE: No new() function; that's for the individual effects.
894 { "set_int", EffectBlueprint_set_int },
895 { "set_float", EffectBlueprint_set_float },
896 { "set_vec3", EffectBlueprint_set_vec3 },
897 { "set_vec4", EffectBlueprint_set_vec4 },
901 const luaL_Reg EffectChain_funcs[] = {
902 { "new", EffectChain_new },
903 { "__gc", EffectChain_gc },
904 { "add_live_input", EffectChain_add_live_input },
905 { "add_video_input", EffectChain_add_video_input },
907 { "add_html_input", EffectChain_add_html_input },
909 { "add_effect", EffectChain_add_effect },
910 { "finalize", EffectChain_finalize },
914 const luaL_Reg LiveInputWrapper_funcs[] = {
915 { "connect_signal", LiveInputWrapper_connect_signal },
919 const luaL_Reg ImageInput_funcs[] = {
920 { "new", ImageInput_new },
924 const luaL_Reg VideoInput_funcs[] = {
925 { "new", VideoInput_new },
926 { "rewind", VideoInput_rewind },
927 { "disconnect", VideoInput_disconnect },
928 { "change_rate", VideoInput_change_rate },
929 { "get_signal_num", VideoInput_get_signal_num },
933 const luaL_Reg HTMLInput_funcs[] = {
934 { "new", HTMLInput_new },
936 { "set_url", HTMLInput_set_url },
937 { "reload", HTMLInput_reload },
938 { "set_max_fps", HTMLInput_set_max_fps },
939 { "execute_javascript_async", HTMLInput_execute_javascript_async },
940 { "resize", HTMLInput_resize },
941 { "get_signal_num", HTMLInput_get_signal_num },
947 // All of these are solely for new(); the returned metatable will be that of
948 // EffectBlueprint, and Effect (returned from add_effect()) is its own type.
950 const luaL_Reg IdentityEffect_funcs[] = {
951 { "new", IdentityEffect_new },
955 const luaL_Reg WhiteBalanceEffect_funcs[] = {
956 { "new", WhiteBalanceEffect_new },
960 const luaL_Reg ResampleEffect_funcs[] = {
961 { "new", ResampleEffect_new },
965 const luaL_Reg PaddingEffect_funcs[] = {
966 { "new", PaddingEffect_new },
970 const luaL_Reg IntegralPaddingEffect_funcs[] = {
971 { "new", IntegralPaddingEffect_new },
975 const luaL_Reg OverlayEffect_funcs[] = {
976 { "new", OverlayEffect_new },
980 const luaL_Reg ResizeEffect_funcs[] = {
981 { "new", ResizeEffect_new },
985 const luaL_Reg MultiplyEffect_funcs[] = {
986 { "new", MultiplyEffect_new },
990 const luaL_Reg MixEffect_funcs[] = {
991 { "new", MixEffect_new },
995 const luaL_Reg LiftGammaGainEffect_funcs[] = {
996 { "new", LiftGammaGainEffect_new },
1002 const luaL_Reg InputStateInfo_funcs[] = {
1003 { "get_width", InputStateInfo_get_width },
1004 { "get_height", InputStateInfo_get_height },
1005 { "get_frame_width", InputStateInfo_get_width }, // Same as get_width().
1006 { "get_frame_height", InputStateInfo_get_frame_height },
1007 { "get_interlaced", InputStateInfo_get_interlaced },
1008 { "get_has_signal", InputStateInfo_get_has_signal },
1009 { "get_is_connected", InputStateInfo_get_is_connected },
1010 { "get_frame_rate_nom", InputStateInfo_get_frame_rate_nom },
1011 { "get_frame_rate_den", InputStateInfo_get_frame_rate_den },
1012 { "get_last_subtitle", InputStateInfo_get_last_subtitle },
1013 { "get_human_readable_resolution", InputStateInfo_get_human_readable_resolution },
1017 const luaL_Reg ThemeMenu_funcs[] = {
1018 { "set", ThemeMenu_set },
1024 LiveInputWrapper::LiveInputWrapper(
1027 bmusb::PixelFormat pixel_format,
1028 bool override_bounce,
1030 bool user_connectable)
1032 pixel_format(pixel_format),
1033 deinterlace(deinterlace),
1034 user_connectable(user_connectable)
1036 ImageFormat inout_format;
1037 inout_format.color_space = COLORSPACE_sRGB;
1039 // Gamma curve depends on the input signal, and we don't really get any
1040 // indications. A camera would be expected to do Rec. 709, but
1041 // I haven't checked if any do in practice. However, computers _do_ output
1042 // in sRGB gamma (ie., they don't convert from sRGB to Rec. 709), and
1043 // I wouldn't really be surprised if most non-professional cameras do, too.
1044 // So we pick sRGB as the least evil here.
1045 inout_format.gamma_curve = GAMMA_sRGB;
1047 unsigned num_inputs;
1049 deinterlace_effect = new movit::DeinterlaceEffect();
1051 // As per the comments in deinterlace_effect.h, we turn this off.
1052 // The most likely interlaced input for us is either a camera
1053 // (where it's fine to turn it off) or a laptop (where it _should_
1055 CHECK(deinterlace_effect->set_int("enable_spatial_interlacing_check", 0));
1057 num_inputs = deinterlace_effect->num_inputs();
1058 assert(num_inputs == FRAME_HISTORY_LENGTH);
1063 if (pixel_format == bmusb::PixelFormat_8BitBGRA) {
1064 for (unsigned i = 0; i < num_inputs; ++i) {
1065 // We upload our textures ourselves, and Movit swaps
1066 // R and B in the shader if we specify BGRA, so lie and say RGBA.
1067 rgba_inputs.push_back(new sRGBSwitchingFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
1068 chain->add_input(rgba_inputs.back());
1072 vector<Effect *> reverse_inputs(rgba_inputs.rbegin(), rgba_inputs.rend());
1073 chain->add_effect(deinterlace_effect, reverse_inputs);
1076 assert(pixel_format == bmusb::PixelFormat_8BitYCbCr ||
1077 pixel_format == bmusb::PixelFormat_10BitYCbCr ||
1078 pixel_format == bmusb::PixelFormat_8BitYCbCrPlanar);
1080 // Most of these settings will be overridden later if using PixelFormat_8BitYCbCrPlanar.
1081 input_ycbcr_format.chroma_subsampling_x = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1 : 2;
1082 input_ycbcr_format.chroma_subsampling_y = 1;
1083 input_ycbcr_format.num_levels = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1024 : 256;
1084 input_ycbcr_format.cb_x_position = 0.0;
1085 input_ycbcr_format.cr_x_position = 0.0;
1086 input_ycbcr_format.cb_y_position = 0.5;
1087 input_ycbcr_format.cr_y_position = 0.5;
1088 input_ycbcr_format.luma_coefficients = YCBCR_REC_709; // Will be overridden later even if not planar.
1089 input_ycbcr_format.full_range = false; // Will be overridden later even if not planar.
1091 for (unsigned i = 0; i < num_inputs; ++i) {
1092 // When using 10-bit input, we're converting to interleaved through v210Converter.
1093 YCbCrInputSplitting splitting;
1094 if (pixel_format == bmusb::PixelFormat_10BitYCbCr) {
1095 splitting = YCBCR_INPUT_INTERLEAVED;
1096 } else if (pixel_format == bmusb::PixelFormat_8BitYCbCr) {
1097 splitting = YCBCR_INPUT_SPLIT_Y_AND_CBCR;
1099 splitting = YCBCR_INPUT_PLANAR;
1101 if (override_bounce) {
1102 ycbcr_inputs.push_back(new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
1104 ycbcr_inputs.push_back(new YCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
1106 chain->add_input(ycbcr_inputs.back());
1110 vector<Effect *> reverse_inputs(ycbcr_inputs.rbegin(), ycbcr_inputs.rend());
1111 chain->add_effect(deinterlace_effect, reverse_inputs);
1116 bool LiveInputWrapper::connect_signal(int signal_num)
1118 if (!user_connectable) {
1122 if (global_mixer == nullptr) {
1127 int card_idx = theme->map_signal_to_card(signal_num);
1128 connect_card(card_idx, *theme->input_state);
1132 void LiveInputWrapper::connect_card(int card_idx, const InputState &input_state)
1134 BufferedFrame first_frame = input_state.buffered_frames[card_idx][0];
1135 if (first_frame.frame == nullptr) {
1139 unsigned width, height;
1141 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)first_frame.frame->userdata;
1142 width = userdata->last_width[first_frame.field_number];
1143 height = userdata->last_height[first_frame.field_number];
1144 if (userdata->last_interlaced) {
1149 movit::YCbCrLumaCoefficients ycbcr_coefficients = input_state.ycbcr_coefficients[card_idx];
1150 bool full_range = input_state.full_range[card_idx];
1152 if (input_state.ycbcr_coefficients_auto[card_idx]) {
1155 // The Blackmagic driver docs claim that the device outputs Y'CbCr
1156 // according to Rec. 601, but this seems to indicate the subsampling
1157 // positions only, as they publish Y'CbCr → RGB formulas that are
1158 // different for HD and SD (corresponding to Rec. 709 and 601, respectively),
1159 // and a Lenovo X1 gen 3 I used to test definitely outputs Rec. 709
1160 // (at least up to rounding error). Other devices seem to use Rec. 601
1161 // even on HD resolutions. Nevertheless, Rec. 709 _is_ the right choice
1162 // for HD, so we default to that if the user hasn't set anything.
1163 if (height >= 720) {
1164 ycbcr_coefficients = YCBCR_REC_709;
1166 ycbcr_coefficients = YCBCR_REC_601;
1170 // This is a global, but it doesn't really matter.
1171 input_ycbcr_format.luma_coefficients = ycbcr_coefficients;
1172 input_ycbcr_format.full_range = full_range;
1174 BufferedFrame last_good_frame = first_frame;
1175 for (unsigned i = 0; i < max(ycbcr_inputs.size(), rgba_inputs.size()); ++i) {
1176 BufferedFrame frame = input_state.buffered_frames[card_idx][i];
1177 if (frame.frame == nullptr) {
1178 // Not enough data; reuse last frame (well, field).
1179 // This is suboptimal, but we have nothing better.
1180 frame = last_good_frame;
1182 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
1184 unsigned this_width = userdata->last_width[frame.field_number];
1185 unsigned this_height = userdata->last_height[frame.field_number];
1186 if (this_width != width || this_height != height) {
1187 // Resolution changed; reuse last frame/field.
1188 frame = last_good_frame;
1189 userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
1192 assert(userdata->pixel_format == pixel_format);
1193 switch (pixel_format) {
1194 case bmusb::PixelFormat_8BitYCbCr:
1195 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
1196 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cbcr[frame.field_number]);
1197 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
1198 ycbcr_inputs[i]->set_width(width);
1199 ycbcr_inputs[i]->set_height(height);
1201 case bmusb::PixelFormat_8BitYCbCrPlanar:
1202 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
1203 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cb[frame.field_number]);
1204 ycbcr_inputs[i]->set_texture_num(2, userdata->tex_cr[frame.field_number]);
1205 ycbcr_inputs[i]->change_ycbcr_format(userdata->ycbcr_format);
1206 ycbcr_inputs[i]->set_width(width);
1207 ycbcr_inputs[i]->set_height(height);
1209 case bmusb::PixelFormat_10BitYCbCr:
1210 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_444[frame.field_number]);
1211 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
1212 ycbcr_inputs[i]->set_width(width);
1213 ycbcr_inputs[i]->set_height(height);
1215 case bmusb::PixelFormat_8BitBGRA:
1216 rgba_inputs[i]->set_texture_num(userdata->tex_rgba[frame.field_number]);
1217 rgba_inputs[i]->set_width(width);
1218 rgba_inputs[i]->set_height(height);
1224 last_good_frame = frame;
1228 BufferedFrame frame = input_state.buffered_frames[card_idx][0];
1229 CHECK(deinterlace_effect->set_int("current_field_position", frame.field_number));
1235 int call_num_channels(lua_State *L)
1237 lua_getglobal(L, "num_channels");
1239 if (lua_pcall(L, 0, 1, 0) != 0) {
1240 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
1241 fprintf(stderr, "Try Nageru.set_num_channels(...) at the start of the script instead.\n");
1245 int num_channels = luaL_checknumber(L, 1);
1247 assert(lua_gettop(L) == 0);
1248 return num_channels;
1253 int Nageru_set_channel_name(lua_State *L)
1255 // NOTE: m is already locked.
1256 Theme *theme = get_theme_updata(L);
1257 unsigned channel = luaL_checknumber(L, 1);
1258 const string text = checkstdstring(L, 2);
1259 theme->channel_names[channel] = text;
1264 int Nageru_set_num_channels(lua_State *L)
1266 // NOTE: m is already locked.
1267 Theme *theme = get_theme_updata(L);
1268 if (theme->startup_finished) {
1269 luaL_error(L, "set_num_channels() can only be called at startup.");
1271 theme->num_channels = luaL_checknumber(L, 1);
1276 int Nageru_set_channel_signal(lua_State *L)
1278 // NOTE: m is already locked.
1279 Theme *theme = get_theme_updata(L);
1280 if (theme->startup_finished) {
1281 luaL_error(L, "set_channel_signal() can only be called at startup.");
1283 unsigned channel = luaL_checknumber(L, 1);
1284 int signal = luaL_checknumber(L, 2);
1285 theme->channel_signals[channel] = signal;
1290 int Nageru_set_supports_wb(lua_State *L)
1292 // NOTE: m is already locked.
1293 Theme *theme = get_theme_updata(L);
1294 if (theme->startup_finished) {
1295 luaL_error(L, "set_supports_wb() can only be called at startup.");
1297 unsigned channel = luaL_checknumber(L, 1);
1298 bool supports_wb = checkbool(L, 2);
1299 theme->channel_supports_wb[channel] = supports_wb;
1304 // NOTE: There's a race condition in all of the audio functions; if the mapping
1305 // is changed by the user underway, you might not be manipulating the bus you
1306 // expect. (You should not get crashes, though.) There's not all that much we
1307 // can do about it, short of locking the entire mixer while anything from the
1310 int Nageru_get_num_audio_buses(lua_State *L)
1312 if (global_audio_mixer == nullptr) {
1313 // The audio mixer isn't set up until we know how many FFmpeg inputs we have.
1314 luaL_error(L, "Audio functions can not be called before the theme is done initializing.");
1316 lua_pushinteger(L, global_audio_mixer->num_buses());
1320 int Nageru_get_audio_bus_name(lua_State *L)
1322 if (global_audio_mixer == nullptr) {
1323 // The audio mixer isn't set up until we know how many FFmpeg inputs we have.
1324 luaL_error(L, "Audio functions can not be called before the theme is done initializing.");
1326 int bus_index = luaL_checknumber(L, 1);
1327 InputMapping input_mapping = global_audio_mixer->get_input_mapping();
1328 if (bus_index < 0 || size_t(bus_index) >= input_mapping.buses.size()) {
1329 // Doesn't fix the race, but fixes other out-of-bounds.
1330 print_warning(L, "Theme called get_audio_bus_name() on nonexistent bus %d; returning nil.\n", bus_index);
1333 lua_pushstring(L, input_mapping.buses[bus_index].name.c_str());
1338 int Nageru_get_audio_bus_fader_level_db(lua_State *L)
1340 if (global_audio_mixer == nullptr) {
1341 // The audio mixer isn't set up until we know how many FFmpeg inputs we have.
1342 luaL_error(L, "Audio functions can not be called before the theme is done initializing.");
1345 int bus_index = luaL_checknumber(L, 1);
1346 if (bus_index < 0 || size_t(bus_index) >= global_audio_mixer->num_buses()) {
1347 // Doesn't fix the race, but fixes other out-of-bounds.
1348 print_warning(L, "Theme called get_audio_bus_fader_level_db() on nonexistent bus %d; returning 0.0.\n", bus_index);
1349 lua_pushnumber(L, 0.0);
1351 lua_pushnumber(L, global_audio_mixer->get_fader_volume(bus_index));
1356 int Nageru_set_audio_bus_fader_level_db(lua_State *L)
1358 if (global_audio_mixer == nullptr || global_mainwindow == nullptr) {
1359 // The audio mixer isn't set up until we know how many FFmpeg inputs we have.
1360 luaL_error(L, "Audio functions can not be called before the theme is done initializing.");
1363 int bus_index = luaL_checknumber(L, 1);
1364 if (bus_index < 0 || size_t(bus_index) >= global_audio_mixer->num_buses()) {
1365 // Doesn't fix the race, but fixes other out-of-bounds.
1366 print_warning(L, "Theme called set_audio_bus_fader_level_db() on nonexistent bus %d; ignoring.\n", bus_index);
1369 double level_db = luaL_checknumber(L, 2);
1371 // Go through the UI, so that it gets updated.
1372 global_mainwindow->set_fader_absolute(bus_index, level_db);
1376 int Nageru_get_audio_bus_mute(lua_State *L)
1378 if (global_audio_mixer == nullptr) {
1379 // The audio mixer isn't set up until we know how many FFmpeg inputs we have.
1380 luaL_error(L, "Audio functions can not be called before the theme is done initializing.");
1383 int bus_index = luaL_checknumber(L, 1);
1384 if (bus_index < 0 || size_t(bus_index) >= global_audio_mixer->num_buses()) {
1385 // Doesn't fix the race, but fixes other out-of-bounds.
1386 print_warning(L, "Theme called get_audio_bus_mute() on nonexistent bus %d; returning false.\n", bus_index);
1387 lua_pushboolean(L, false);
1389 lua_pushboolean(L, global_audio_mixer->get_mute(bus_index));
1394 int Nageru_set_audio_bus_mute(lua_State *L)
1396 if (global_audio_mixer == nullptr || global_mainwindow == nullptr) {
1397 // The audio mixer isn't set up until we know how many FFmpeg inputs we have.
1398 luaL_error(L, "Audio functions can not be called before the theme is done initializing.");
1401 int bus_index = luaL_checknumber(L, 1);
1402 if (bus_index < 0 || size_t(bus_index) >= global_audio_mixer->num_buses()) {
1403 // Doesn't fix the race, but fixes other out-of-bounds.
1404 print_warning(L, "Theme called set_audio_bus_mute() on nonexistent bus %d; ignoring.\n", bus_index);
1407 bool mute = checkbool(L, 2);
1409 // Go through the UI, so that it gets updated.
1410 if (mute != global_audio_mixer->get_mute(bus_index)) {
1411 global_mainwindow->toggle_mute(bus_index);
1416 int Nageru_get_audio_bus_eq_level_db(lua_State *L)
1418 if (global_audio_mixer == nullptr) {
1419 // The audio mixer isn't set up until we know how many FFmpeg inputs we have.
1420 luaL_error(L, "Audio functions can not be called before the theme is done initializing.");
1423 int bus_index = luaL_checknumber(L, 1);
1424 int band = luaL_checknumber(L, 2);
1425 if (bus_index < 0 || size_t(bus_index) >= global_audio_mixer->num_buses()) {
1426 // Doesn't fix the race, but fixes other out-of-bounds.
1427 print_warning(L, "Theme called get_audio_bus_eq_level_db() on nonexistent bus %d; returning 0.0.\n", bus_index);
1428 lua_pushnumber(L, 0.0);
1429 } else if (band != EQ_BAND_BASS && band != EQ_BAND_MID && band != EQ_BAND_TREBLE) {
1430 print_warning(L, "Theme called get_audio_bus_eq_level_db() on nonexistent band; returning 0.0.\n", bus_index);
1431 lua_pushnumber(L, 0.0);
1433 lua_pushnumber(L, global_audio_mixer->get_eq(bus_index, EQBand(band)));
1438 int Nageru_set_audio_bus_eq_level_db(lua_State *L)
1440 if (global_audio_mixer == nullptr || global_mainwindow == nullptr) {
1441 // The audio mixer isn't set up until we know how many FFmpeg inputs we have.
1442 luaL_error(L, "Audio functions can not be called before the theme is done initializing.");
1445 int bus_index = luaL_checknumber(L, 1);
1446 int band = luaL_checknumber(L, 2);
1447 if (bus_index < 0 || size_t(bus_index) >= global_audio_mixer->num_buses()) {
1448 // Doesn't fix the race, but fixes other out-of-bounds.
1449 print_warning(L, "Theme called set_audio_bus_eq_level_db() on nonexistent bus %d; ignoring.\n", bus_index);
1451 } else if (band != EQ_BAND_BASS && band != EQ_BAND_MID && band != EQ_BAND_TREBLE) {
1452 print_warning(L, "Theme called set_audio_bus_eq_level_db() on nonexistent band; returning 0.0.\n", bus_index);
1455 double level_db = luaL_checknumber(L, 3);
1457 // Go through the UI, so that it gets updated.
1458 global_mainwindow->set_eq_absolute(bus_index, EQBand(band), level_db);
1462 Theme::Theme(const string &filename, const vector<string> &search_dirs, ResourcePool *resource_pool, unsigned num_cards)
1463 : resource_pool(resource_pool), num_cards(num_cards), signal_to_card_mapping(global_flags.default_stream_mapping)
1466 channel_names[0] = "Live";
1467 channel_names[1] = "Preview";
1469 L = luaL_newstate();
1472 // Search through all directories until we find a file that will load
1473 // (as in, does not return LUA_ERRFILE); then run it. We store load errors
1474 // from all the attempts, and show them once we know we can't find any of them.
1476 vector<string> errors;
1477 bool success = false;
1479 vector<string> real_search_dirs;
1480 if (!filename.empty() && filename[0] == '/') {
1481 real_search_dirs.push_back("");
1483 real_search_dirs = search_dirs;
1488 for (const string &dir : real_search_dirs) {
1492 path = dir + "/" + filename;
1494 int err = luaL_loadfile(L, path.c_str());
1496 // Save the theme for when we're actually going to run it
1497 // (we need to set up the right environment below first,
1498 // and we couldn't do that before, because we didn't know the
1499 // path to put in Nageru.THEME_PATH).
1500 theme_code_ref = luaL_ref(L, LUA_REGISTRYINDEX);
1501 assert(lua_gettop(L) == 0);
1506 errors.push_back(lua_tostring(L, -1));
1508 if (err != LUA_ERRFILE) {
1509 // The file actually loaded, but failed to parse somehow. Abort; don't try the next one.
1515 for (const string &error : errors) {
1516 fprintf(stderr, "%s\n", error.c_str());
1520 assert(lua_gettop(L) == 0);
1522 // Make sure the path exposed to the theme (as Nageru.THEME_PATH;
1523 // can be useful for locating files when talking to CEF) is absolute.
1524 // In a sense, it would be nice if realpath() had a mode not to
1525 // resolve symlinks, but it doesn't, so we only call it if we don't
1526 // already have an absolute path (which may leave ../ elements etc.).
1527 if (path[0] == '/') {
1530 char *absolute_theme_path = realpath(path.c_str(), nullptr);
1531 theme_path = absolute_theme_path;
1532 free(absolute_theme_path);
1535 // Set up the API we provide.
1537 register_class("Scene", Scene_funcs);
1538 register_class("Block", Block_funcs);
1539 register_class("EffectBlueprint", EffectBlueprint_funcs);
1540 register_class("EffectChain", EffectChain_funcs);
1541 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
1542 register_class("ImageInput", ImageInput_funcs);
1543 register_class("VideoInput", VideoInput_funcs);
1544 register_class("HTMLInput", HTMLInput_funcs);
1545 register_class("IdentityEffect", IdentityEffect_funcs, IDENTITY_EFFECT);
1546 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs, WHITE_BALANCE_EFFECT);
1547 register_class("ResampleEffect", ResampleEffect_funcs, RESAMPLE_EFFECT);
1548 register_class("PaddingEffect", PaddingEffect_funcs, PADDING_EFFECT);
1549 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs, INTEGRAL_PADDING_EFFECT);
1550 register_class("OverlayEffect", OverlayEffect_funcs, OVERLAY_EFFECT);
1551 register_class("ResizeEffect", ResizeEffect_funcs, RESIZE_EFFECT);
1552 register_class("MultiplyEffect", MultiplyEffect_funcs, MULTIPLY_EFFECT);
1553 register_class("MixEffect", MixEffect_funcs, MIX_EFFECT);
1554 register_class("LiftGammaGainEffect", LiftGammaGainEffect_funcs, LIFT_GAMMA_GAIN_EFFECT);
1555 register_class("InputStateInfo", InputStateInfo_funcs);
1556 register_class("ThemeMenu", ThemeMenu_funcs);
1558 // Now actually run the theme to get everything set up.
1559 lua_rawgeti(L, LUA_REGISTRYINDEX, theme_code_ref);
1560 luaL_unref(L, LUA_REGISTRYINDEX, theme_code_ref);
1561 if (lua_pcall(L, 0, 0, 0)) {
1562 fprintf(stderr, "Error when running %s: %s\n", path.c_str(), lua_tostring(L, -1));
1565 assert(lua_gettop(L) == 0);
1567 if (num_channels == -1) {
1568 // Ask it for the number of channels.
1569 num_channels = call_num_channels(L);
1571 startup_finished = true;
1580 void Theme::register_globals()
1582 // Set Nageru.VIDEO_FORMAT_BGRA = bmusb::PixelFormat_8BitBGRA, etc.
1583 const vector<pair<string, int>> num_constants = {
1584 { "VIDEO_FORMAT_BGRA", bmusb::PixelFormat_8BitBGRA },
1585 { "VIDEO_FORMAT_YCBCR", bmusb::PixelFormat_8BitYCbCrPlanar },
1586 { "CHECKABLE", MenuEntry::CHECKABLE },
1587 { "CHECKED", MenuEntry::CHECKED },
1588 { "EQ_BAND_BASS", EQ_BAND_BASS },
1589 { "EQ_BAND_MID", EQ_BAND_MID },
1590 { "EQ_BAND_TREBLE", EQ_BAND_TREBLE },
1592 const vector<pair<string, string>> str_constants = {
1593 { "THEME_PATH", theme_path },
1596 lua_newtable(L); // t = {}
1598 for (const pair<string, int> &constant : num_constants) {
1599 lua_pushstring(L, constant.first.c_str());
1600 lua_pushinteger(L, constant.second);
1601 lua_settable(L, 1); // t[key] = value
1603 for (const pair<string, string> &constant : str_constants) {
1604 lua_pushstring(L, constant.first.c_str());
1605 lua_pushstring(L, constant.second.c_str());
1606 lua_settable(L, 1); // t[key] = value
1609 const luaL_Reg Nageru_funcs[] = {
1610 // Channel information.
1611 { "set_channel_name", Nageru_set_channel_name },
1612 { "set_num_channels", Nageru_set_num_channels },
1613 { "set_channel_signal", Nageru_set_channel_signal },
1614 { "set_supports_wb", Nageru_set_supports_wb },
1617 { "get_num_audio_buses", Nageru_get_num_audio_buses },
1618 { "get_audio_bus_name", Nageru_get_audio_bus_name },
1619 { "get_audio_bus_fader_level_db", Nageru_get_audio_bus_fader_level_db },
1620 { "set_audio_bus_fader_level_db", Nageru_set_audio_bus_fader_level_db },
1621 { "get_audio_bus_eq_level_db", Nageru_get_audio_bus_eq_level_db },
1622 { "set_audio_bus_eq_level_db", Nageru_set_audio_bus_eq_level_db },
1623 { "get_audio_bus_mute", Nageru_get_audio_bus_mute },
1624 { "set_audio_bus_mute", Nageru_set_audio_bus_mute },
1626 { nullptr, nullptr }
1628 lua_pushlightuserdata(L, this);
1629 luaL_setfuncs(L, Nageru_funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
1631 lua_setglobal(L, "Nageru"); // Nageru = t
1632 assert(lua_gettop(L) == 0);
1635 void Theme::register_class(const char *class_name, const luaL_Reg *funcs, EffectType effect_type)
1637 assert(lua_gettop(L) == 0);
1638 luaL_newmetatable(L, class_name); // mt = {}
1639 lua_pushlightuserdata(L, this);
1640 luaL_setfuncs(L, funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
1641 lua_pushvalue(L, -1);
1642 lua_setfield(L, -2, "__index"); // mt.__index = mt
1643 if (effect_type != NO_EFFECT_TYPE) {
1644 lua_pushnumber(L, effect_type);
1645 lua_setfield(L, -2, "__effect_type_id"); // mt.__effect_type_id = effect_type
1647 lua_setglobal(L, class_name); // ClassName = mt
1648 assert(lua_gettop(L) == 0);
1651 Theme::Chain Theme::get_chain_from_effect_chain(EffectChain *effect_chain, unsigned num, const InputState &input_state)
1653 if (!lua_isfunction(L, -1)) {
1654 fprintf(stderr, "Argument #-1 should be a function\n");
1657 lua_pushvalue(L, -1);
1658 shared_ptr<LuaRefWithDeleter> funcref(new LuaRefWithDeleter(&m, L, luaL_ref(L, LUA_REGISTRYINDEX)));
1662 chain.chain = effect_chain;
1663 chain.setup_chain = [this, funcref, input_state, effect_chain]{
1664 lock_guard<mutex> lock(m);
1666 assert(this->input_state == nullptr);
1667 this->input_state = &input_state;
1669 // Set up state, including connecting signals.
1670 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref->get());
1671 if (lua_pcall(L, 0, 0, 0) != 0) {
1672 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
1675 assert(lua_gettop(L) == 0);
1677 // The theme can't (or at least shouldn't!) call connect_signal() on
1678 // each FFmpeg or CEF input, so we'll do it here.
1679 if (video_signal_connections.count(effect_chain)) {
1680 for (const VideoSignalConnection &conn : video_signal_connections[effect_chain]) {
1681 conn.wrapper->connect_card(conn.source->get_card_index(), input_state);
1685 if (html_signal_connections.count(effect_chain)) {
1686 for (const CEFSignalConnection &conn : html_signal_connections[effect_chain]) {
1687 conn.wrapper->connect_card(conn.source->get_card_index(), input_state);
1692 this->input_state = nullptr;
1697 Theme::Chain Theme::get_chain(unsigned num, float t, unsigned width, unsigned height, const InputState &input_state)
1699 const char *func_name = "get_scene"; // For error reporting.
1702 lock_guard<mutex> lock(m);
1703 assert(lua_gettop(L) == 0);
1704 lua_getglobal(L, "get_scene"); /* function to be called */
1705 if (lua_isnil(L, -1)) {
1706 // Try the pre-1.9.0 name for compatibility.
1708 lua_getglobal(L, "get_chain");
1709 func_name = "get_chain";
1711 lua_pushnumber(L, num);
1712 lua_pushnumber(L, t);
1713 lua_pushnumber(L, width);
1714 lua_pushnumber(L, height);
1715 wrap_lua_object<InputStateInfo>(L, "InputStateInfo", input_state);
1717 if (lua_pcall(L, 5, LUA_MULTRET, 0) != 0) {
1718 fprintf(stderr, "error running function “%s”: %s\n", func_name, lua_tostring(L, -1));
1722 if (luaL_testudata(L, -1, "Scene") != nullptr) {
1723 if (lua_gettop(L) != 1) {
1724 luaL_error(L, "%s() for chain number %d returned an Scene, but also other items", func_name);
1726 Scene *auto_effect_chain = (Scene *)luaL_testudata(L, -1, "Scene");
1727 auto chain_and_setup = auto_effect_chain->get_chain(this, L, num, input_state);
1728 chain.chain = chain_and_setup.first;
1729 chain.setup_chain = move(chain_and_setup.second);
1730 } else if (luaL_testudata(L, -2, "EffectChain") != nullptr) {
1731 // Old-style (pre-Nageru 1.9.0) return of a single chain and prepare function.
1732 if (lua_gettop(L) != 2) {
1733 luaL_error(L, "%s() for chain number %d returned an EffectChain, but needs to also return a prepare function (or use Scene)", func_name);
1735 EffectChain *effect_chain = (EffectChain *)luaL_testudata(L, -2, "EffectChain");
1736 chain = get_chain_from_effect_chain(effect_chain, num, input_state);
1738 luaL_error(L, "%s() for chain number %d did not return an EffectChain or Scene\n", func_name, num);
1740 assert(lua_gettop(L) == 0);
1742 // TODO: Can we do better, e.g. by running setup_chain() and seeing what it references?
1743 // Actually, setup_chain does maybe hold all the references we need now anyway?
1744 chain.input_frames.reserve(num_cards * FRAME_HISTORY_LENGTH);
1745 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
1746 for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
1747 chain.input_frames.push_back(input_state.buffered_frames[card_index][frame_num].frame);
1754 string Theme::get_channel_name(unsigned channel)
1756 lock_guard<mutex> lock(m);
1758 // We never ask the legacy channel_name() about live and preview.
1759 // The defaults are set in our constructor.
1760 if (channel == 0 || channel == 1) {
1761 return channel_names[channel];
1764 lua_getglobal(L, "channel_name");
1765 if (lua_isnil(L, -1)) {
1767 if (channel_names.count(channel)) {
1768 return channel_names[channel];
1770 return "(no title)";
1774 lua_pushnumber(L, channel);
1775 if (lua_pcall(L, 1, 1, 0) != 0) {
1776 fprintf(stderr, "error running function `channel_name': %s\n", lua_tostring(L, -1));
1779 const char *ret = lua_tostring(L, -1);
1780 if (ret == nullptr) {
1781 fprintf(stderr, "function `channel_name' returned nil for channel %d\n", channel);
1782 fprintf(stderr, "Try Nageru.set_channel_name(channel, name) at the start of the script instead.\n");
1786 string retstr = ret;
1788 assert(lua_gettop(L) == 0);
1792 int Theme::map_channel_to_signal(unsigned channel)
1794 lock_guard<mutex> lock(m);
1795 lua_getglobal(L, "channel_signal");
1796 if (lua_isnil(L, -1)) {
1798 if (channel_signals.count(channel)) {
1799 return channel_signals[channel];
1805 lua_pushnumber(L, channel);
1806 if (lua_pcall(L, 1, 1, 0) != 0) {
1807 fprintf(stderr, "error running function `channel_signal': %s\n", lua_tostring(L, -1));
1808 fprintf(stderr, "Try Nageru.set_channel_signal(channel, signal) at the start of the script instead.\n");
1812 int ret = luaL_checknumber(L, 1);
1814 assert(lua_gettop(L) == 0);
1818 std::string Theme::get_channel_color(unsigned channel)
1820 lock_guard<mutex> lock(m);
1821 lua_getglobal(L, "channel_color");
1822 lua_pushnumber(L, channel);
1823 if (lua_pcall(L, 1, 1, 0) != 0) {
1824 fprintf(stderr, "error running function `channel_color': %s\n", lua_tostring(L, -1));
1828 const char *ret = lua_tostring(L, -1);
1829 if (ret == nullptr) {
1830 fprintf(stderr, "function `channel_color' returned nil for channel %d\n", channel);
1834 string retstr = ret;
1836 assert(lua_gettop(L) == 0);
1840 bool Theme::get_supports_set_wb(unsigned channel)
1842 lock_guard<mutex> lock(m);
1843 lua_getglobal(L, "supports_set_wb");
1844 if (lua_isnil(L, -1)) {
1846 if (channel_supports_wb.count(channel)) {
1847 return channel_supports_wb[channel];
1853 lua_pushnumber(L, channel);
1854 if (lua_pcall(L, 1, 1, 0) != 0) {
1855 fprintf(stderr, "error running function `supports_set_wb': %s\n", lua_tostring(L, -1));
1856 fprintf(stderr, "Try Nageru.set_supports_wb(channel, bool) at the start of the script instead.\n");
1860 bool ret = checkbool(L, -1);
1862 assert(lua_gettop(L) == 0);
1866 void Theme::set_wb(unsigned channel, float r, float g, float b)
1868 int signal = map_channel_to_signal(channel);
1870 lock_guard<mutex> lock(m);
1872 int card_idx = map_signal_to_card(signal);
1873 white_balance_for_card[card_idx] = RGBTriplet{ r, g, b };
1876 call_lua_wb_callback(channel, r, g, b);
1879 void Theme::set_wb_for_card(int card_idx, float r, float g, float b)
1881 lock_guard<mutex> lock(m);
1882 white_balance_for_card[card_idx] = RGBTriplet{ r, g, b };
1884 for (const auto &channel_and_signal : channel_signals) {
1885 if (map_signal_to_card(channel_and_signal.second) == card_idx) {
1886 call_lua_wb_callback(channel_and_signal.first, r, g, b);
1891 void Theme::call_lua_wb_callback(unsigned channel, float r, float g, float b)
1893 lua_getglobal(L, "set_wb");
1894 if (lua_isnil(L, -1)) {
1895 // The function doesn't exist, to just ignore. We've stored the white balance,
1896 // and most likely, it will be picked up by auto white balance instead.
1900 lua_pushnumber(L, channel);
1901 lua_pushnumber(L, r);
1902 lua_pushnumber(L, g);
1903 lua_pushnumber(L, b);
1904 if (lua_pcall(L, 4, 0, 0) != 0) {
1905 fprintf(stderr, "error running function `set_wb': %s\n", lua_tostring(L, -1));
1909 assert(lua_gettop(L) == 0);
1912 RGBTriplet Theme::get_white_balance_for_card(int card_idx)
1914 if (white_balance_for_card.count(card_idx)) {
1915 return white_balance_for_card[card_idx];
1917 return RGBTriplet{ 1.0, 1.0, 1.0 };
1921 vector<string> Theme::get_transition_names(float t)
1923 lock_guard<mutex> lock(m);
1924 lua_getglobal(L, "get_transitions");
1925 lua_pushnumber(L, t);
1926 if (lua_pcall(L, 1, 1, 0) != 0) {
1927 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
1933 while (lua_next(L, -2) != 0) {
1934 ret.push_back(lua_tostring(L, -1));
1938 assert(lua_gettop(L) == 0);
1942 int Theme::map_signal_to_card(int signal_num)
1944 // Negative numbers map to raw signals.
1945 if (signal_num < 0) {
1946 return -1 - signal_num;
1949 lock_guard<mutex> lock(map_m);
1950 if (signal_to_card_mapping.count(signal_num)) {
1951 return signal_to_card_mapping[signal_num];
1955 if (global_flags.output_card != -1 && num_cards > 1) {
1956 // Try to exclude the output card from the default card_index.
1957 card_index = signal_num % (num_cards - 1);
1958 if (card_index >= global_flags.output_card) {
1961 if (signal_num >= int(num_cards - 1)) {
1962 print_warning(L, "Theme asked for input %d, but we only have %u input card(s) (card %d is busy with output).\n",
1963 signal_num, num_cards - 1, global_flags.output_card);
1964 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1967 card_index = signal_num % num_cards;
1968 if (signal_num >= int(num_cards)) {
1969 print_warning(L, "Theme asked for input %d, but we only have %u card(s).\n", signal_num, num_cards);
1970 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1973 signal_to_card_mapping[signal_num] = card_index;
1977 void Theme::set_signal_mapping(int signal_num, int card_idx)
1979 lock_guard<mutex> lock(map_m);
1980 assert(card_idx < int(num_cards));
1981 signal_to_card_mapping[signal_num] = card_idx;
1984 void Theme::transition_clicked(int transition_num, float t)
1986 lock_guard<mutex> lock(m);
1987 lua_getglobal(L, "transition_clicked");
1988 lua_pushnumber(L, transition_num);
1989 lua_pushnumber(L, t);
1991 if (lua_pcall(L, 2, 0, 0) != 0) {
1992 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
1995 assert(lua_gettop(L) == 0);
1998 void Theme::channel_clicked(int preview_num)
2000 lock_guard<mutex> lock(m);
2001 lua_getglobal(L, "channel_clicked");
2002 lua_pushnumber(L, preview_num);
2004 if (lua_pcall(L, 1, 0, 0) != 0) {
2005 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
2008 assert(lua_gettop(L) == 0);
2012 void destroy(T &ref)
2017 Theme::MenuEntry::~MenuEntry()
2022 luaL_unref(entry.L, LUA_REGISTRYINDEX, entry.lua_ref);
2028 vector<unique_ptr<Theme::MenuEntry>> create_recursive_theme_menu(lua_State *L);
2030 unique_ptr<Theme::MenuEntry> create_theme_menu_entry(lua_State *L, int index)
2032 unique_ptr<Theme::MenuEntry> entry;
2034 lua_rawgeti(L, index, 1);
2035 const string text = checkstdstring(L, -1);
2039 if (lua_objlen(L, -1) > 2) {
2040 lua_rawgeti(L, -1, 3);
2041 flags = luaL_checknumber(L, -1);
2045 lua_rawgeti(L, index, 2);
2046 if (lua_istable(L, -1)) {
2047 vector<unique_ptr<Theme::MenuEntry>> submenu = create_recursive_theme_menu(L);
2048 entry.reset(new Theme::MenuEntry{ text, move(submenu) });
2051 luaL_checktype(L, -1, LUA_TFUNCTION);
2052 int ref = luaL_ref(L, LUA_REGISTRYINDEX);
2053 entry.reset(new Theme::MenuEntry{ text, L, ref, flags });
2058 vector<unique_ptr<Theme::MenuEntry>> create_recursive_theme_menu(lua_State *L)
2060 vector<unique_ptr<Theme::MenuEntry>> menu;
2061 size_t num_elements = lua_objlen(L, -1);
2062 for (size_t i = 1; i <= num_elements; ++i) {
2063 lua_rawgeti(L, -1, i);
2064 menu.emplace_back(create_theme_menu_entry(L, -1));
2072 int Theme::set_theme_menu(lua_State *L)
2076 vector<unique_ptr<MenuEntry>> root_menu;
2077 int num_elements = lua_gettop(L);
2078 for (int i = 1; i <= num_elements; ++i) {
2079 root_menu.emplace_back(create_theme_menu_entry(L, i));
2081 theme_menu.reset(new MenuEntry("", move(root_menu)));
2083 lua_pop(L, num_elements);
2084 assert(lua_gettop(L) == 0);
2086 if (theme_menu_callback != nullptr) {
2087 theme_menu_callback();
2093 void Theme::theme_menu_entry_clicked(int lua_ref)
2095 lock_guard<mutex> lock(m);
2096 lua_rawgeti(L, LUA_REGISTRYINDEX, lua_ref);
2097 if (lua_pcall(L, 0, 0, 0) != 0) {
2098 fprintf(stderr, "error running menu callback: %s\n", lua_tostring(L, -1));
2103 string Theme::format_status_line(const string &disk_space_left_text, double file_length_seconds)
2105 lock_guard<mutex> lock(m);
2106 lua_getglobal(L, "format_status_line");
2107 if (lua_isnil(L, -1)) {
2109 return disk_space_left_text;
2112 lua_pushstring(L, disk_space_left_text.c_str());
2113 lua_pushnumber(L, file_length_seconds);
2114 if (lua_pcall(L, 2, 1, 0) != 0) {
2115 fprintf(stderr, "error running function format_status_line(): %s\n", lua_tostring(L, -1));
2118 string text = checkstdstring(L, 1);
2120 assert(lua_gettop(L) == 0);