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());
705 // Helper function to write e.g. “60” or “59.94”.
706 string format_frame_rate(int nom, int den)
709 if (nom % den == 0) {
710 snprintf(buf, sizeof(buf), "%d", nom / den);
712 snprintf(buf, sizeof(buf), "%.2f", double(nom) / den);
717 // Helper function to write e.g. “720p60”.
718 string get_human_readable_resolution(const InputStateInfo *input_state_info, int signal_num)
721 if (input_state_info->last_interlaced[signal_num]) {
722 snprintf(buf, sizeof(buf), "%di", input_state_info->last_height[signal_num] * 2);
724 // Show field rate instead of frame rate; really for cosmetics only
725 // (and actually contrary to EBU recommendations, although in line
726 // with typical user expectations).
727 return buf + format_frame_rate(input_state_info->last_frame_rate_nom[signal_num] * 2,
728 input_state_info->last_frame_rate_den[signal_num]);
730 snprintf(buf, sizeof(buf), "%dp", input_state_info->last_height[signal_num]);
731 return buf + format_frame_rate(input_state_info->last_frame_rate_nom[signal_num],
732 input_state_info->last_frame_rate_den[signal_num]);
738 int InputStateInfo_get_human_readable_resolution(lua_State* L)
740 assert(lua_gettop(L) == 2);
741 InputStateInfo *input_state_info = get_input_state_info(L, 1);
742 Theme *theme = get_theme_updata(L);
743 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
746 if (!input_state_info->last_is_connected[signal_num]) {
747 str = "disconnected";
748 } else if (input_state_info->last_height[signal_num] <= 0) {
750 } else if (!input_state_info->last_has_signal[signal_num]) {
751 if (input_state_info->last_height[signal_num] == 525) {
752 // Special mode for the USB3 cards.
755 str = get_human_readable_resolution(input_state_info, signal_num) + ", no signal";
758 str = get_human_readable_resolution(input_state_info, signal_num);
761 lua_pushstring(L, str.c_str());
766 int EffectBlueprint_set_int(lua_State *L)
768 assert(lua_gettop(L) == 3);
769 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
770 string key = checkstdstring(L, 2);
771 float value = luaL_checknumber(L, 3);
772 if (blueprint->effect != nullptr) {
773 if (!blueprint->effect->set_int(key, value)) {
774 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
777 // TODO: check validity already here, if possible?
778 blueprint->int_parameters[key] = value;
783 int EffectBlueprint_set_float(lua_State *L)
785 assert(lua_gettop(L) == 3);
786 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
787 string key = checkstdstring(L, 2);
788 float value = luaL_checknumber(L, 3);
789 if (blueprint->effect != nullptr) {
790 if (!blueprint->effect->set_float(key, value)) {
791 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
794 // TODO: check validity already here, if possible?
795 blueprint->float_parameters[key] = value;
800 int EffectBlueprint_set_vec3(lua_State *L)
802 assert(lua_gettop(L) == 5);
803 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
804 string key = checkstdstring(L, 2);
806 v[0] = luaL_checknumber(L, 3);
807 v[1] = luaL_checknumber(L, 4);
808 v[2] = luaL_checknumber(L, 5);
810 if (blueprint->effect != nullptr) {
811 if (!blueprint->effect->set_vec3(key, v.data())) {
812 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", key.c_str(),
816 // TODO: check validity already here, if possible?
817 blueprint->vec3_parameters[key] = v;
823 int EffectBlueprint_set_vec4(lua_State *L)
825 assert(lua_gettop(L) == 6);
826 EffectBlueprint *blueprint = *(EffectBlueprint **)luaL_checkudata(L, 1, "EffectBlueprint");
827 string key = checkstdstring(L, 2);
829 v[0] = luaL_checknumber(L, 3);
830 v[1] = luaL_checknumber(L, 4);
831 v[2] = luaL_checknumber(L, 5);
832 v[3] = luaL_checknumber(L, 6);
833 if (blueprint->effect != nullptr) {
834 if (!blueprint->effect->set_vec4(key, v.data())) {
835 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", key.c_str(),
836 v[0], v[1], v[2], v[3]);
839 // TODO: check validity already here, if possible?
840 blueprint->vec4_parameters[key] = v;
845 const luaL_Reg Scene_funcs[] = {
846 { "new", Scene_new },
847 { "__gc", Scene_gc },
848 { "add_input", Scene::add_input },
849 { "add_effect", Scene::add_effect },
850 { "add_optional_effect", Scene::add_optional_effect },
851 { "finalize", Scene::finalize },
855 const luaL_Reg Block_funcs[] = {
856 { "display", Block_display },
857 { "choose", Block_choose },
858 { "enable", Block_enable },
859 { "enable_if", Block_enable_if },
860 { "disable", Block_disable },
861 { "always_disable_if_disabled", Block_always_disable_if_disabled },
862 { "set_int", Block_set_int },
863 { "set_float", Block_set_float },
864 { "set_vec3", Block_set_vec3 },
865 { "set_vec4", Block_set_vec4 },
869 const luaL_Reg EffectBlueprint_funcs[] = {
870 // NOTE: No new() function; that's for the individual effects.
871 { "set_int", EffectBlueprint_set_int },
872 { "set_float", EffectBlueprint_set_float },
873 { "set_vec3", EffectBlueprint_set_vec3 },
874 { "set_vec4", EffectBlueprint_set_vec4 },
878 const luaL_Reg EffectChain_funcs[] = {
879 { "new", EffectChain_new },
880 { "__gc", EffectChain_gc },
881 { "add_live_input", EffectChain_add_live_input },
882 { "add_video_input", EffectChain_add_video_input },
884 { "add_html_input", EffectChain_add_html_input },
886 { "add_effect", EffectChain_add_effect },
887 { "finalize", EffectChain_finalize },
891 const luaL_Reg LiveInputWrapper_funcs[] = {
892 { "connect_signal", LiveInputWrapper_connect_signal },
896 const luaL_Reg ImageInput_funcs[] = {
897 { "new", ImageInput_new },
901 const luaL_Reg VideoInput_funcs[] = {
902 { "new", VideoInput_new },
903 { "rewind", VideoInput_rewind },
904 { "disconnect", VideoInput_disconnect },
905 { "change_rate", VideoInput_change_rate },
906 { "get_signal_num", VideoInput_get_signal_num },
910 const luaL_Reg HTMLInput_funcs[] = {
911 { "new", HTMLInput_new },
913 { "set_url", HTMLInput_set_url },
914 { "reload", HTMLInput_reload },
915 { "set_max_fps", HTMLInput_set_max_fps },
916 { "execute_javascript_async", HTMLInput_execute_javascript_async },
917 { "resize", HTMLInput_resize },
918 { "get_signal_num", HTMLInput_get_signal_num },
924 // All of these are solely for new(); the returned metatable will be that of
925 // EffectBlueprint, and Effect (returned from add_effect()) is its own type.
927 const luaL_Reg IdentityEffect_funcs[] = {
928 { "new", IdentityEffect_new },
932 const luaL_Reg WhiteBalanceEffect_funcs[] = {
933 { "new", WhiteBalanceEffect_new },
937 const luaL_Reg ResampleEffect_funcs[] = {
938 { "new", ResampleEffect_new },
942 const luaL_Reg PaddingEffect_funcs[] = {
943 { "new", PaddingEffect_new },
947 const luaL_Reg IntegralPaddingEffect_funcs[] = {
948 { "new", IntegralPaddingEffect_new },
952 const luaL_Reg OverlayEffect_funcs[] = {
953 { "new", OverlayEffect_new },
957 const luaL_Reg ResizeEffect_funcs[] = {
958 { "new", ResizeEffect_new },
962 const luaL_Reg MultiplyEffect_funcs[] = {
963 { "new", MultiplyEffect_new },
967 const luaL_Reg MixEffect_funcs[] = {
968 { "new", MixEffect_new },
972 const luaL_Reg LiftGammaGainEffect_funcs[] = {
973 { "new", LiftGammaGainEffect_new },
979 const luaL_Reg InputStateInfo_funcs[] = {
980 { "get_width", InputStateInfo_get_width },
981 { "get_height", InputStateInfo_get_height },
982 { "get_interlaced", InputStateInfo_get_interlaced },
983 { "get_has_signal", InputStateInfo_get_has_signal },
984 { "get_is_connected", InputStateInfo_get_is_connected },
985 { "get_frame_rate_nom", InputStateInfo_get_frame_rate_nom },
986 { "get_frame_rate_den", InputStateInfo_get_frame_rate_den },
987 { "get_last_subtitle", InputStateInfo_get_last_subtitle },
988 { "get_human_readable_resolution", InputStateInfo_get_human_readable_resolution },
992 const luaL_Reg ThemeMenu_funcs[] = {
993 { "set", ThemeMenu_set },
999 LiveInputWrapper::LiveInputWrapper(
1002 bmusb::PixelFormat pixel_format,
1003 bool override_bounce,
1005 bool user_connectable)
1007 pixel_format(pixel_format),
1008 deinterlace(deinterlace),
1009 user_connectable(user_connectable)
1011 ImageFormat inout_format;
1012 inout_format.color_space = COLORSPACE_sRGB;
1014 // Gamma curve depends on the input signal, and we don't really get any
1015 // indications. A camera would be expected to do Rec. 709, but
1016 // I haven't checked if any do in practice. However, computers _do_ output
1017 // in sRGB gamma (ie., they don't convert from sRGB to Rec. 709), and
1018 // I wouldn't really be surprised if most non-professional cameras do, too.
1019 // So we pick sRGB as the least evil here.
1020 inout_format.gamma_curve = GAMMA_sRGB;
1022 unsigned num_inputs;
1024 deinterlace_effect = new movit::DeinterlaceEffect();
1026 // As per the comments in deinterlace_effect.h, we turn this off.
1027 // The most likely interlaced input for us is either a camera
1028 // (where it's fine to turn it off) or a laptop (where it _should_
1030 CHECK(deinterlace_effect->set_int("enable_spatial_interlacing_check", 0));
1032 num_inputs = deinterlace_effect->num_inputs();
1033 assert(num_inputs == FRAME_HISTORY_LENGTH);
1038 if (pixel_format == bmusb::PixelFormat_8BitBGRA) {
1039 for (unsigned i = 0; i < num_inputs; ++i) {
1040 // We upload our textures ourselves, and Movit swaps
1041 // R and B in the shader if we specify BGRA, so lie and say RGBA.
1042 rgba_inputs.push_back(new sRGBSwitchingFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
1043 chain->add_input(rgba_inputs.back());
1047 vector<Effect *> reverse_inputs(rgba_inputs.rbegin(), rgba_inputs.rend());
1048 chain->add_effect(deinterlace_effect, reverse_inputs);
1051 assert(pixel_format == bmusb::PixelFormat_8BitYCbCr ||
1052 pixel_format == bmusb::PixelFormat_10BitYCbCr ||
1053 pixel_format == bmusb::PixelFormat_8BitYCbCrPlanar);
1055 // Most of these settings will be overridden later if using PixelFormat_8BitYCbCrPlanar.
1056 input_ycbcr_format.chroma_subsampling_x = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1 : 2;
1057 input_ycbcr_format.chroma_subsampling_y = 1;
1058 input_ycbcr_format.num_levels = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1024 : 256;
1059 input_ycbcr_format.cb_x_position = 0.0;
1060 input_ycbcr_format.cr_x_position = 0.0;
1061 input_ycbcr_format.cb_y_position = 0.5;
1062 input_ycbcr_format.cr_y_position = 0.5;
1063 input_ycbcr_format.luma_coefficients = YCBCR_REC_709; // Will be overridden later even if not planar.
1064 input_ycbcr_format.full_range = false; // Will be overridden later even if not planar.
1066 for (unsigned i = 0; i < num_inputs; ++i) {
1067 // When using 10-bit input, we're converting to interleaved through v210Converter.
1068 YCbCrInputSplitting splitting;
1069 if (pixel_format == bmusb::PixelFormat_10BitYCbCr) {
1070 splitting = YCBCR_INPUT_INTERLEAVED;
1071 } else if (pixel_format == bmusb::PixelFormat_8BitYCbCr) {
1072 splitting = YCBCR_INPUT_SPLIT_Y_AND_CBCR;
1074 splitting = YCBCR_INPUT_PLANAR;
1076 if (override_bounce) {
1077 ycbcr_inputs.push_back(new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
1079 ycbcr_inputs.push_back(new YCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
1081 chain->add_input(ycbcr_inputs.back());
1085 vector<Effect *> reverse_inputs(ycbcr_inputs.rbegin(), ycbcr_inputs.rend());
1086 chain->add_effect(deinterlace_effect, reverse_inputs);
1091 bool LiveInputWrapper::connect_signal(int signal_num)
1093 if (!user_connectable) {
1097 if (global_mixer == nullptr) {
1102 signal_num = theme->map_signal(signal_num);
1103 connect_signal_raw(signal_num, *theme->input_state);
1107 void LiveInputWrapper::connect_signal_raw(int signal_num, const InputState &input_state)
1109 BufferedFrame first_frame = input_state.buffered_frames[signal_num][0];
1110 if (first_frame.frame == nullptr) {
1114 unsigned width, height;
1116 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)first_frame.frame->userdata;
1117 width = userdata->last_width[first_frame.field_number];
1118 height = userdata->last_height[first_frame.field_number];
1119 if (userdata->last_interlaced) {
1124 movit::YCbCrLumaCoefficients ycbcr_coefficients = input_state.ycbcr_coefficients[signal_num];
1125 bool full_range = input_state.full_range[signal_num];
1127 if (input_state.ycbcr_coefficients_auto[signal_num]) {
1130 // The Blackmagic driver docs claim that the device outputs Y'CbCr
1131 // according to Rec. 601, but this seems to indicate the subsampling
1132 // positions only, as they publish Y'CbCr → RGB formulas that are
1133 // different for HD and SD (corresponding to Rec. 709 and 601, respectively),
1134 // and a Lenovo X1 gen 3 I used to test definitely outputs Rec. 709
1135 // (at least up to rounding error). Other devices seem to use Rec. 601
1136 // even on HD resolutions. Nevertheless, Rec. 709 _is_ the right choice
1137 // for HD, so we default to that if the user hasn't set anything.
1138 if (height >= 720) {
1139 ycbcr_coefficients = YCBCR_REC_709;
1141 ycbcr_coefficients = YCBCR_REC_601;
1145 // This is a global, but it doesn't really matter.
1146 input_ycbcr_format.luma_coefficients = ycbcr_coefficients;
1147 input_ycbcr_format.full_range = full_range;
1149 BufferedFrame last_good_frame = first_frame;
1150 for (unsigned i = 0; i < max(ycbcr_inputs.size(), rgba_inputs.size()); ++i) {
1151 BufferedFrame frame = input_state.buffered_frames[signal_num][i];
1152 if (frame.frame == nullptr) {
1153 // Not enough data; reuse last frame (well, field).
1154 // This is suboptimal, but we have nothing better.
1155 frame = last_good_frame;
1157 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
1159 unsigned this_width = userdata->last_width[frame.field_number];
1160 unsigned this_height = userdata->last_height[frame.field_number];
1161 if (this_width != width || this_height != height) {
1162 // Resolution changed; reuse last frame/field.
1163 frame = last_good_frame;
1164 userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
1167 assert(userdata->pixel_format == pixel_format);
1168 switch (pixel_format) {
1169 case bmusb::PixelFormat_8BitYCbCr:
1170 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
1171 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cbcr[frame.field_number]);
1172 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
1173 ycbcr_inputs[i]->set_width(width);
1174 ycbcr_inputs[i]->set_height(height);
1176 case bmusb::PixelFormat_8BitYCbCrPlanar:
1177 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
1178 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cb[frame.field_number]);
1179 ycbcr_inputs[i]->set_texture_num(2, userdata->tex_cr[frame.field_number]);
1180 ycbcr_inputs[i]->change_ycbcr_format(userdata->ycbcr_format);
1181 ycbcr_inputs[i]->set_width(width);
1182 ycbcr_inputs[i]->set_height(height);
1184 case bmusb::PixelFormat_10BitYCbCr:
1185 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_444[frame.field_number]);
1186 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
1187 ycbcr_inputs[i]->set_width(width);
1188 ycbcr_inputs[i]->set_height(height);
1190 case bmusb::PixelFormat_8BitBGRA:
1191 rgba_inputs[i]->set_texture_num(userdata->tex_rgba[frame.field_number]);
1192 rgba_inputs[i]->set_width(width);
1193 rgba_inputs[i]->set_height(height);
1199 last_good_frame = frame;
1203 BufferedFrame frame = input_state.buffered_frames[signal_num][0];
1204 CHECK(deinterlace_effect->set_int("current_field_position", frame.field_number));
1210 int call_num_channels(lua_State *L)
1212 lua_getglobal(L, "num_channels");
1214 if (lua_pcall(L, 0, 1, 0) != 0) {
1215 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
1216 fprintf(stderr, "Try Nageru.set_num_channels(...) at the start of the script instead.\n");
1220 int num_channels = luaL_checknumber(L, 1);
1222 assert(lua_gettop(L) == 0);
1223 return num_channels;
1228 int Nageru_set_channel_name(lua_State *L)
1230 // NOTE: m is already locked.
1231 Theme *theme = get_theme_updata(L);
1232 unsigned channel = luaL_checknumber(L, 1);
1233 const string text = checkstdstring(L, 2);
1234 theme->channel_names[channel] = text;
1239 int Nageru_set_num_channels(lua_State *L)
1241 // NOTE: m is already locked.
1242 Theme *theme = get_theme_updata(L);
1243 if (theme->startup_finished) {
1244 luaL_error(L, "set_num_channels() can only be called at startup.");
1246 theme->num_channels = luaL_checknumber(L, 1);
1251 int Nageru_set_channel_signal(lua_State *L)
1253 // NOTE: m is already locked.
1254 Theme *theme = get_theme_updata(L);
1255 if (theme->startup_finished) {
1256 luaL_error(L, "set_channel_signal() can only be called at startup.");
1258 unsigned channel = luaL_checknumber(L, 1);
1259 int signal = luaL_checknumber(L, 2);
1260 theme->channel_signals[channel] = signal;
1265 int Nageru_set_supports_wb(lua_State *L)
1267 // NOTE: m is already locked.
1268 Theme *theme = get_theme_updata(L);
1269 if (theme->startup_finished) {
1270 luaL_error(L, "set_supports_wb() can only be called at startup.");
1272 unsigned channel = luaL_checknumber(L, 1);
1273 bool supports_wb = checkbool(L, 2);
1274 theme->channel_supports_wb[channel] = supports_wb;
1279 Theme::Theme(const string &filename, const vector<string> &search_dirs, ResourcePool *resource_pool, unsigned num_cards)
1280 : resource_pool(resource_pool), num_cards(num_cards), signal_to_card_mapping(global_flags.default_stream_mapping)
1282 L = luaL_newstate();
1285 // Search through all directories until we find a file that will load
1286 // (as in, does not return LUA_ERRFILE); then run it. We store load errors
1287 // from all the attempts, and show them once we know we can't find any of them.
1289 vector<string> errors;
1290 bool success = false;
1292 vector<string> real_search_dirs;
1293 if (!filename.empty() && filename[0] == '/') {
1294 real_search_dirs.push_back("");
1296 real_search_dirs = search_dirs;
1301 for (const string &dir : real_search_dirs) {
1305 path = dir + "/" + filename;
1307 int err = luaL_loadfile(L, path.c_str());
1309 // Save the theme for when we're actually going to run it
1310 // (we need to set up the right environment below first,
1311 // and we couldn't do that before, because we didn't know the
1312 // path to put in Nageru.THEME_PATH).
1313 theme_code_ref = luaL_ref(L, LUA_REGISTRYINDEX);
1314 assert(lua_gettop(L) == 0);
1319 errors.push_back(lua_tostring(L, -1));
1321 if (err != LUA_ERRFILE) {
1322 // The file actually loaded, but failed to parse somehow. Abort; don't try the next one.
1328 for (const string &error : errors) {
1329 fprintf(stderr, "%s\n", error.c_str());
1333 assert(lua_gettop(L) == 0);
1335 // Make sure the path exposed to the theme (as Nageru.THEME_PATH;
1336 // can be useful for locating files when talking to CEF) is absolute.
1337 // In a sense, it would be nice if realpath() had a mode not to
1338 // resolve symlinks, but it doesn't, so we only call it if we don't
1339 // already have an absolute path (which may leave ../ elements etc.).
1340 if (path[0] == '/') {
1343 char *absolute_theme_path = realpath(path.c_str(), nullptr);
1344 theme_path = absolute_theme_path;
1345 free(absolute_theme_path);
1348 // Set up the API we provide.
1350 register_class("Scene", Scene_funcs);
1351 register_class("Block", Block_funcs);
1352 register_class("EffectBlueprint", EffectBlueprint_funcs);
1353 register_class("EffectChain", EffectChain_funcs);
1354 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
1355 register_class("ImageInput", ImageInput_funcs);
1356 register_class("VideoInput", VideoInput_funcs);
1357 register_class("HTMLInput", HTMLInput_funcs);
1358 register_class("IdentityEffect", IdentityEffect_funcs, IDENTITY_EFFECT);
1359 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs, WHITE_BALANCE_EFFECT);
1360 register_class("ResampleEffect", ResampleEffect_funcs, RESAMPLE_EFFECT);
1361 register_class("PaddingEffect", PaddingEffect_funcs, PADDING_EFFECT);
1362 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs, INTEGRAL_PADDING_EFFECT);
1363 register_class("OverlayEffect", OverlayEffect_funcs, OVERLAY_EFFECT);
1364 register_class("ResizeEffect", ResizeEffect_funcs, RESIZE_EFFECT);
1365 register_class("MultiplyEffect", MultiplyEffect_funcs, MULTIPLY_EFFECT);
1366 register_class("MixEffect", MixEffect_funcs, MIX_EFFECT);
1367 register_class("LiftGammaGainEffect", LiftGammaGainEffect_funcs, LIFT_GAMMA_GAIN_EFFECT);
1368 register_class("InputStateInfo", InputStateInfo_funcs);
1369 register_class("ThemeMenu", ThemeMenu_funcs);
1371 // Now actually run the theme to get everything set up.
1372 lua_rawgeti(L, LUA_REGISTRYINDEX, theme_code_ref);
1373 luaL_unref(L, LUA_REGISTRYINDEX, theme_code_ref);
1374 if (lua_pcall(L, 0, 0, 0)) {
1375 fprintf(stderr, "Error when running %s: %s\n", path.c_str(), lua_tostring(L, -1));
1378 assert(lua_gettop(L) == 0);
1380 if (num_channels == -1) {
1381 // Ask it for the number of channels.
1382 num_channels = call_num_channels(L);
1384 startup_finished = true;
1393 void Theme::register_globals()
1395 // Set Nageru.VIDEO_FORMAT_BGRA = bmusb::PixelFormat_8BitBGRA, etc.
1396 const vector<pair<string, int>> num_constants = {
1397 { "VIDEO_FORMAT_BGRA", bmusb::PixelFormat_8BitBGRA },
1398 { "VIDEO_FORMAT_YCBCR", bmusb::PixelFormat_8BitYCbCrPlanar },
1400 const vector<pair<string, string>> str_constants = {
1401 { "THEME_PATH", theme_path },
1404 lua_newtable(L); // t = {}
1406 for (const pair<string, int> &constant : num_constants) {
1407 lua_pushstring(L, constant.first.c_str());
1408 lua_pushinteger(L, constant.second);
1409 lua_settable(L, 1); // t[key] = value
1411 for (const pair<string, string> &constant : str_constants) {
1412 lua_pushstring(L, constant.first.c_str());
1413 lua_pushstring(L, constant.second.c_str());
1414 lua_settable(L, 1); // t[key] = value
1417 const luaL_Reg Nageru_funcs[] = {
1418 { "set_channel_name", Nageru_set_channel_name },
1419 { "set_num_channels", Nageru_set_num_channels },
1420 { "set_channel_signal", Nageru_set_channel_signal },
1421 { "set_supports_wb", Nageru_set_supports_wb },
1424 lua_pushlightuserdata(L, this);
1425 luaL_setfuncs(L, Nageru_funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
1427 lua_setglobal(L, "Nageru"); // Nageru = t
1428 assert(lua_gettop(L) == 0);
1431 void Theme::register_class(const char *class_name, const luaL_Reg *funcs, EffectType effect_type)
1433 assert(lua_gettop(L) == 0);
1434 luaL_newmetatable(L, class_name); // mt = {}
1435 lua_pushlightuserdata(L, this);
1436 luaL_setfuncs(L, funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
1437 lua_pushvalue(L, -1);
1438 lua_setfield(L, -2, "__index"); // mt.__index = mt
1439 if (effect_type != NO_EFFECT_TYPE) {
1440 lua_pushnumber(L, effect_type);
1441 lua_setfield(L, -2, "__effect_type_id"); // mt.__effect_type_id = effect_type
1443 lua_setglobal(L, class_name); // ClassName = mt
1444 assert(lua_gettop(L) == 0);
1447 Theme::Chain Theme::get_chain_from_effect_chain(EffectChain *effect_chain, unsigned num, const InputState &input_state)
1449 if (!lua_isfunction(L, -1)) {
1450 fprintf(stderr, "Argument #-1 should be a function\n");
1453 lua_pushvalue(L, -1);
1454 shared_ptr<LuaRefWithDeleter> funcref(new LuaRefWithDeleter(&m, L, luaL_ref(L, LUA_REGISTRYINDEX)));
1458 chain.chain = effect_chain;
1459 chain.setup_chain = [this, funcref, input_state, effect_chain]{
1460 lock_guard<mutex> lock(m);
1462 assert(this->input_state == nullptr);
1463 this->input_state = &input_state;
1465 // Set up state, including connecting signals.
1466 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref->get());
1467 if (lua_pcall(L, 0, 0, 0) != 0) {
1468 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
1471 assert(lua_gettop(L) == 0);
1473 // The theme can't (or at least shouldn't!) call connect_signal() on
1474 // each FFmpeg or CEF input, so we'll do it here.
1475 if (video_signal_connections.count(effect_chain)) {
1476 for (const VideoSignalConnection &conn : video_signal_connections[effect_chain]) {
1477 conn.wrapper->connect_signal_raw(conn.source->get_card_index(), input_state);
1481 if (html_signal_connections.count(effect_chain)) {
1482 for (const CEFSignalConnection &conn : html_signal_connections[effect_chain]) {
1483 conn.wrapper->connect_signal_raw(conn.source->get_card_index(), input_state);
1488 this->input_state = nullptr;
1493 Theme::Chain Theme::get_chain(unsigned num, float t, unsigned width, unsigned height, const InputState &input_state)
1495 const char *func_name = "get_scene"; // For error reporting.
1498 lock_guard<mutex> lock(m);
1499 assert(lua_gettop(L) == 0);
1500 lua_getglobal(L, "get_scene"); /* function to be called */
1501 if (lua_isnil(L, -1)) {
1502 // Try the pre-1.9.0 name for compatibility.
1504 lua_getglobal(L, "get_chain");
1505 func_name = "get_chain";
1507 lua_pushnumber(L, num);
1508 lua_pushnumber(L, t);
1509 lua_pushnumber(L, width);
1510 lua_pushnumber(L, height);
1511 wrap_lua_object<InputStateInfo>(L, "InputStateInfo", input_state);
1513 if (lua_pcall(L, 5, LUA_MULTRET, 0) != 0) {
1514 fprintf(stderr, "error running function “%s”: %s\n", func_name, lua_tostring(L, -1));
1518 if (luaL_testudata(L, -1, "Scene") != nullptr) {
1519 if (lua_gettop(L) != 1) {
1520 luaL_error(L, "%s() for chain number %d returned an Scene, but also other items", func_name);
1522 Scene *auto_effect_chain = (Scene *)luaL_testudata(L, -1, "Scene");
1523 auto chain_and_setup = auto_effect_chain->get_chain(this, L, num, input_state);
1524 chain.chain = chain_and_setup.first;
1525 chain.setup_chain = move(chain_and_setup.second);
1526 } else if (luaL_testudata(L, -2, "EffectChain") != nullptr) {
1527 // Old-style (pre-Nageru 1.9.0) return of a single chain and prepare function.
1528 if (lua_gettop(L) != 2) {
1529 luaL_error(L, "%s() for chain number %d returned an EffectChain, but needs to also return a prepare function (or use Scene)", func_name);
1531 EffectChain *effect_chain = (EffectChain *)luaL_testudata(L, -2, "EffectChain");
1532 chain = get_chain_from_effect_chain(effect_chain, num, input_state);
1534 luaL_error(L, "%s() for chain number %d did not return an EffectChain or Scene\n", func_name, num);
1536 assert(lua_gettop(L) == 0);
1538 // TODO: Can we do better, e.g. by running setup_chain() and seeing what it references?
1539 // Actually, setup_chain does maybe hold all the references we need now anyway?
1540 chain.input_frames.reserve(num_cards * FRAME_HISTORY_LENGTH);
1541 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
1542 for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
1543 chain.input_frames.push_back(input_state.buffered_frames[card_index][frame_num].frame);
1550 string Theme::get_channel_name(unsigned channel)
1552 lock_guard<mutex> lock(m);
1554 lua_getglobal(L, "channel_name");
1555 if (lua_isnil(L, -1)) {
1557 if (channel_names.count(channel)) {
1558 return channel_names[channel];
1560 return "(no title)";
1564 lua_pushnumber(L, channel);
1565 if (lua_pcall(L, 1, 1, 0) != 0) {
1566 fprintf(stderr, "error running function `channel_name': %s\n", lua_tostring(L, -1));
1569 const char *ret = lua_tostring(L, -1);
1570 if (ret == nullptr) {
1571 fprintf(stderr, "function `channel_name' returned nil for channel %d\n", channel);
1572 fprintf(stderr, "Try Nageru.set_channel_name(channel, name) at the start of the script instead.\n");
1576 string retstr = ret;
1578 assert(lua_gettop(L) == 0);
1582 int Theme::get_channel_signal(unsigned channel)
1584 lock_guard<mutex> lock(m);
1585 lua_getglobal(L, "channel_signal");
1586 if (lua_isnil(L, -1)) {
1588 if (channel_signals.count(channel)) {
1589 return channel_signals[channel];
1595 lua_pushnumber(L, channel);
1596 if (lua_pcall(L, 1, 1, 0) != 0) {
1597 fprintf(stderr, "error running function `channel_signal': %s\n", lua_tostring(L, -1));
1598 fprintf(stderr, "Try Nageru.set_channel_signal(channel, signal) at the start of the script instead.\n");
1602 int ret = luaL_checknumber(L, 1);
1604 assert(lua_gettop(L) == 0);
1608 std::string Theme::get_channel_color(unsigned channel)
1610 lock_guard<mutex> lock(m);
1611 lua_getglobal(L, "channel_color");
1612 lua_pushnumber(L, channel);
1613 if (lua_pcall(L, 1, 1, 0) != 0) {
1614 fprintf(stderr, "error running function `channel_color': %s\n", lua_tostring(L, -1));
1618 const char *ret = lua_tostring(L, -1);
1619 if (ret == nullptr) {
1620 fprintf(stderr, "function `channel_color' returned nil for channel %d\n", channel);
1624 string retstr = ret;
1626 assert(lua_gettop(L) == 0);
1630 bool Theme::get_supports_set_wb(unsigned channel)
1632 lock_guard<mutex> lock(m);
1633 lua_getglobal(L, "supports_set_wb");
1634 if (lua_isnil(L, -1)) {
1636 if (channel_supports_wb.count(channel)) {
1637 return channel_supports_wb[channel];
1643 lua_pushnumber(L, channel);
1644 if (lua_pcall(L, 1, 1, 0) != 0) {
1645 fprintf(stderr, "error running function `supports_set_wb': %s\n", lua_tostring(L, -1));
1646 fprintf(stderr, "Try Nageru.set_supports_wb(channel, bool) at the start of the script instead.\n");
1650 bool ret = checkbool(L, -1);
1652 assert(lua_gettop(L) == 0);
1656 void Theme::set_wb(unsigned channel, double r, double g, double b)
1658 lock_guard<mutex> lock(m);
1659 lua_getglobal(L, "set_wb");
1660 lua_pushnumber(L, channel);
1661 lua_pushnumber(L, r);
1662 lua_pushnumber(L, g);
1663 lua_pushnumber(L, b);
1664 if (lua_pcall(L, 4, 0, 0) != 0) {
1665 fprintf(stderr, "error running function `set_wb': %s\n", lua_tostring(L, -1));
1669 assert(lua_gettop(L) == 0);
1672 vector<string> Theme::get_transition_names(float t)
1674 lock_guard<mutex> lock(m);
1675 lua_getglobal(L, "get_transitions");
1676 lua_pushnumber(L, t);
1677 if (lua_pcall(L, 1, 1, 0) != 0) {
1678 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
1684 while (lua_next(L, -2) != 0) {
1685 ret.push_back(lua_tostring(L, -1));
1689 assert(lua_gettop(L) == 0);
1693 int Theme::map_signal(int signal_num)
1695 // Negative numbers map to raw signals.
1696 if (signal_num < 0) {
1697 return -1 - signal_num;
1700 lock_guard<mutex> lock(map_m);
1701 if (signal_to_card_mapping.count(signal_num)) {
1702 return signal_to_card_mapping[signal_num];
1706 if (global_flags.output_card != -1 && num_cards > 1) {
1707 // Try to exclude the output card from the default card_index.
1708 card_index = signal_num % (num_cards - 1);
1709 if (card_index >= global_flags.output_card) {
1712 if (signal_num >= int(num_cards - 1)) {
1713 print_warning(L, "Theme asked for input %d, but we only have %u input card(s) (card %d is busy with output).\n",
1714 signal_num, num_cards - 1, global_flags.output_card);
1715 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1718 card_index = signal_num % num_cards;
1719 if (signal_num >= int(num_cards)) {
1720 print_warning(L, "Theme asked for input %d, but we only have %u card(s).\n", signal_num, num_cards);
1721 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1724 signal_to_card_mapping[signal_num] = card_index;
1728 void Theme::set_signal_mapping(int signal_num, int card_num)
1730 lock_guard<mutex> lock(map_m);
1731 assert(card_num < int(num_cards));
1732 signal_to_card_mapping[signal_num] = card_num;
1735 void Theme::transition_clicked(int transition_num, float t)
1737 lock_guard<mutex> lock(m);
1738 lua_getglobal(L, "transition_clicked");
1739 lua_pushnumber(L, transition_num);
1740 lua_pushnumber(L, t);
1742 if (lua_pcall(L, 2, 0, 0) != 0) {
1743 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
1746 assert(lua_gettop(L) == 0);
1749 void Theme::channel_clicked(int preview_num)
1751 lock_guard<mutex> lock(m);
1752 lua_getglobal(L, "channel_clicked");
1753 lua_pushnumber(L, preview_num);
1755 if (lua_pcall(L, 1, 0, 0) != 0) {
1756 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
1759 assert(lua_gettop(L) == 0);
1763 void destroy(T &ref)
1768 Theme::MenuEntry::~MenuEntry()
1771 luaL_unref(entry.L, LUA_REGISTRYINDEX, entry.lua_ref);
1779 vector<unique_ptr<Theme::MenuEntry>> create_recursive_theme_menu(lua_State *L);
1781 unique_ptr<Theme::MenuEntry> create_theme_menu_entry(lua_State *L, int index)
1783 unique_ptr<Theme::MenuEntry> entry;
1785 lua_rawgeti(L, index, 1);
1786 const string text = checkstdstring(L, -1);
1789 lua_rawgeti(L, index, 2);
1790 if (lua_istable(L, -1)) {
1791 vector<unique_ptr<Theme::MenuEntry>> submenu = create_recursive_theme_menu(L);
1792 entry.reset(new Theme::MenuEntry{ text, move(submenu) });
1795 luaL_checktype(L, -1, LUA_TFUNCTION);
1796 int ref = luaL_ref(L, LUA_REGISTRYINDEX);
1797 entry.reset(new Theme::MenuEntry{ text, L, ref });
1802 vector<unique_ptr<Theme::MenuEntry>> create_recursive_theme_menu(lua_State *L)
1804 vector<unique_ptr<Theme::MenuEntry>> menu;
1805 size_t num_elements = lua_objlen(L, -1);
1806 for (size_t i = 1; i <= num_elements; ++i) {
1807 lua_rawgeti(L, -1, i);
1808 menu.emplace_back(create_theme_menu_entry(L, -1));
1816 int Theme::set_theme_menu(lua_State *L)
1820 vector<unique_ptr<MenuEntry>> root_menu;
1821 int num_elements = lua_gettop(L);
1822 for (int i = 1; i <= num_elements; ++i) {
1823 root_menu.emplace_back(create_theme_menu_entry(L, i));
1825 theme_menu.reset(new MenuEntry("", move(root_menu)));
1827 lua_pop(L, num_elements);
1828 assert(lua_gettop(L) == 0);
1830 if (theme_menu_callback != nullptr) {
1831 theme_menu_callback();
1837 void Theme::theme_menu_entry_clicked(int lua_ref)
1839 lock_guard<mutex> lock(m);
1840 lua_rawgeti(L, LUA_REGISTRYINDEX, lua_ref);
1841 if (lua_pcall(L, 0, 0, 0) != 0) {
1842 fprintf(stderr, "error running menu callback: %s\n", lua_tostring(L, -1));