4 #include <bmusb/bmusb.h>
8 #include <movit/deinterlace_effect.h>
9 #include <movit/effect.h>
10 #include <movit/effect_chain.h>
11 #include <movit/image_format.h>
12 #include <movit/input.h>
13 #include <movit/mix_effect.h>
14 #include <movit/multiply_effect.h>
15 #include <movit/overlay_effect.h>
16 #include <movit/padding_effect.h>
17 #include <movit/resample_effect.h>
18 #include <movit/resize_effect.h>
19 #include <movit/util.h>
20 #include <movit/white_balance_effect.h>
21 #include <movit/ycbcr.h>
22 #include <movit/ycbcr_input.h>
32 #include "cef_capture.h"
34 #include "ffmpeg_capture.h"
36 #include "image_input.h"
37 #include "input_state.h"
38 #include "pbo_frame_allocator.h"
40 #if !defined LUA_VERSION_NUM || LUA_VERSION_NUM==501
42 // Compatibility shims for LuaJIT 2.0 (LuaJIT 2.1 implements the entire Lua 5.2 API).
43 // Adapted from https://github.com/keplerproject/lua-compat-5.2/blob/master/c-api/compat-5.2.c
44 // and licensed as follows:
46 // The MIT License (MIT)
48 // Copyright (c) 2013 Hisham Muhammad
50 // Permission is hereby granted, free of charge, to any person obtaining a copy of
51 // this software and associated documentation files (the "Software"), to deal in
52 // the Software without restriction, including without limitation the rights to
53 // use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
54 // the Software, and to permit persons to whom the Software is furnished to do so,
55 // subject to the following conditions:
57 // The above copyright notice and this permission notice shall be included in all
58 // copies or substantial portions of the Software.
60 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
61 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
62 // FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
63 // COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
64 // IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
65 // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
68 ** Adapted from Lua 5.2.0
70 void luaL_setfuncs(lua_State *L, const luaL_Reg *l, int nup) {
71 luaL_checkstack(L, nup+1, "too many upvalues");
72 for (; l->name != NULL; l++) { /* fill the table with given functions */
74 lua_pushstring(L, l->name);
75 for (i = 0; i < nup; i++) /* copy upvalues to the top */
76 lua_pushvalue(L, -(nup + 1));
77 lua_pushcclosure(L, l->func, nup); /* closure with those upvalues */
78 lua_settable(L, -(nup + 3)); /* table must be below the upvalues, the name and the closure */
80 lua_pop(L, nup); /* remove upvalues */
83 void *luaL_testudata(lua_State *L, int i, const char *tname) {
84 void *p = lua_touserdata(L, i);
85 luaL_checkstack(L, 2, "not enough stack slots");
86 if (p == NULL || !lua_getmetatable(L, i))
90 luaL_getmetatable(L, tname);
91 res = lua_rawequal(L, -1, -2);
108 using namespace movit;
110 extern Mixer *global_mixer;
112 Theme *get_theme_updata(lua_State* L)
114 luaL_checktype(L, lua_upvalueindex(1), LUA_TLIGHTUSERDATA);
115 return (Theme *)lua_touserdata(L, lua_upvalueindex(1));
118 int ThemeMenu_set(lua_State *L)
120 Theme *theme = get_theme_updata(L);
121 return theme->set_theme_menu(L);
126 // Contains basically the same data as InputState, but does not hold on to
127 // a reference to the frames. This is important so that we can release them
128 // without having to wait for Lua's GC.
129 struct InputStateInfo {
130 InputStateInfo(const InputState& input_state);
132 unsigned last_width[MAX_VIDEO_CARDS], last_height[MAX_VIDEO_CARDS];
133 bool last_interlaced[MAX_VIDEO_CARDS], last_has_signal[MAX_VIDEO_CARDS], last_is_connected[MAX_VIDEO_CARDS];
134 unsigned last_frame_rate_nom[MAX_VIDEO_CARDS], last_frame_rate_den[MAX_VIDEO_CARDS];
137 InputStateInfo::InputStateInfo(const InputState &input_state)
139 for (unsigned signal_num = 0; signal_num < MAX_VIDEO_CARDS; ++signal_num) {
140 BufferedFrame frame = input_state.buffered_frames[signal_num][0];
141 if (frame.frame == nullptr) {
142 last_width[signal_num] = last_height[signal_num] = 0;
143 last_interlaced[signal_num] = false;
144 last_has_signal[signal_num] = false;
145 last_is_connected[signal_num] = false;
148 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
149 last_width[signal_num] = userdata->last_width[frame.field_number];
150 last_height[signal_num] = userdata->last_height[frame.field_number];
151 last_interlaced[signal_num] = userdata->last_interlaced;
152 last_has_signal[signal_num] = userdata->last_has_signal;
153 last_is_connected[signal_num] = userdata->last_is_connected;
154 last_frame_rate_nom[signal_num] = userdata->last_frame_rate_nom;
155 last_frame_rate_den[signal_num] = userdata->last_frame_rate_den;
159 class LuaRefWithDeleter {
161 LuaRefWithDeleter(mutex *m, lua_State *L, int ref) : m(m), L(L), ref(ref) {}
162 ~LuaRefWithDeleter() {
163 unique_lock<mutex> lock(*m);
164 luaL_unref(L, LUA_REGISTRYINDEX, ref);
166 int get() const { return ref; }
169 LuaRefWithDeleter(const LuaRefWithDeleter &) = delete;
176 template<class T, class... Args>
177 int wrap_lua_object(lua_State* L, const char *class_name, Args&&... args)
179 // Construct the C++ object and put it on the stack.
180 void *mem = lua_newuserdata(L, sizeof(T));
181 new(mem) T(forward<Args>(args)...);
183 // Look up the metatable named <class_name>, and set it on the new object.
184 luaL_getmetatable(L, class_name);
185 lua_setmetatable(L, -2);
190 // Like wrap_lua_object, but the object is not owned by Lua; ie. it's not freed
191 // by Lua GC. This is typically the case for Effects, which are owned by EffectChain
192 // and expected to be destructed by it. The object will be of type T** instead of T*
193 // when exposed to Lua.
195 // Note that we currently leak if you allocate an Effect in this way and never call
196 // add_effect. We should see if there's a way to e.g. set __gc on it at construction time
197 // and then release that once add_effect() takes ownership.
198 template<class T, class... Args>
199 int wrap_lua_object_nonowned(lua_State* L, const char *class_name, Args&&... args)
201 // Construct the pointer ot the C++ object and put it on the stack.
202 T **obj = (T **)lua_newuserdata(L, sizeof(T *));
203 *obj = new T(forward<Args>(args)...);
205 // Look up the metatable named <class_name>, and set it on the new object.
206 luaL_getmetatable(L, class_name);
207 lua_setmetatable(L, -2);
212 Effect *get_effect(lua_State *L, int idx)
214 if (luaL_testudata(L, idx, "WhiteBalanceEffect") ||
215 luaL_testudata(L, idx, "ResampleEffect") ||
216 luaL_testudata(L, idx, "PaddingEffect") ||
217 luaL_testudata(L, idx, "IntegralPaddingEffect") ||
218 luaL_testudata(L, idx, "OverlayEffect") ||
219 luaL_testudata(L, idx, "ResizeEffect") ||
220 luaL_testudata(L, idx, "MultiplyEffect") ||
221 luaL_testudata(L, idx, "MixEffect") ||
222 luaL_testudata(L, idx, "ImageInput")) {
223 return *(Effect **)lua_touserdata(L, idx);
225 luaL_error(L, "Error: Index #%d was not an Effect type\n", idx);
229 InputStateInfo *get_input_state_info(lua_State *L, int idx)
231 if (luaL_testudata(L, idx, "InputStateInfo")) {
232 return (InputStateInfo *)lua_touserdata(L, idx);
234 luaL_error(L, "Error: Index #%d was not InputStateInfo\n", idx);
238 bool checkbool(lua_State* L, int idx)
240 luaL_checktype(L, idx, LUA_TBOOLEAN);
241 return lua_toboolean(L, idx);
244 string checkstdstring(lua_State *L, int index)
247 const char* cstr = lua_tolstring(L, index, &len);
248 return string(cstr, len);
251 int EffectChain_new(lua_State* L)
253 assert(lua_gettop(L) == 2);
254 Theme *theme = get_theme_updata(L);
255 int aspect_w = luaL_checknumber(L, 1);
256 int aspect_h = luaL_checknumber(L, 2);
258 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h, theme->get_resource_pool());
261 int EffectChain_gc(lua_State* L)
263 assert(lua_gettop(L) == 1);
264 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
265 chain->~EffectChain();
269 int EffectChain_add_live_input(lua_State* L)
271 assert(lua_gettop(L) == 3);
272 Theme *theme = get_theme_updata(L);
273 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
274 bool override_bounce = checkbool(L, 2);
275 bool deinterlace = checkbool(L, 3);
276 bmusb::PixelFormat pixel_format = global_flags.ten_bit_input ? bmusb::PixelFormat_10BitYCbCr : bmusb::PixelFormat_8BitYCbCr;
278 // Needs to be nonowned to match add_video_input (see below).
279 return wrap_lua_object_nonowned<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain, pixel_format, override_bounce, deinterlace, /*user_connectable=*/true);
282 int EffectChain_add_video_input(lua_State* L)
284 assert(lua_gettop(L) == 3);
285 Theme *theme = get_theme_updata(L);
286 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
287 FFmpegCapture **capture = (FFmpegCapture **)luaL_checkudata(L, 2, "VideoInput");
288 bool deinterlace = checkbool(L, 3);
290 // These need to be nonowned, so that the LiveInputWrapper still exists
291 // and can feed frames to the right EffectChain even if the Lua code
292 // doesn't care about the object anymore. (If we change this, we'd need
293 // to also unregister the signal connection on __gc.)
294 int ret = wrap_lua_object_nonowned<LiveInputWrapper>(
295 L, "LiveInputWrapper", theme, chain, (*capture)->get_current_pixel_format(),
296 /*override_bounce=*/false, deinterlace, /*user_connectable=*/false);
298 Theme *theme = get_theme_updata(L);
299 LiveInputWrapper **live_input = (LiveInputWrapper **)lua_touserdata(L, -1);
300 theme->register_video_signal_connection(chain, *live_input, *capture);
306 int EffectChain_add_html_input(lua_State* L)
308 assert(lua_gettop(L) == 2);
309 Theme *theme = get_theme_updata(L);
310 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
311 CEFCapture **capture = (CEFCapture **)luaL_checkudata(L, 2, "HTMLInput");
313 // These need to be nonowned, so that the LiveInputWrapper still exists
314 // and can feed frames to the right EffectChain even if the Lua code
315 // doesn't care about the object anymore. (If we change this, we'd need
316 // to also unregister the signal connection on __gc.)
317 int ret = wrap_lua_object_nonowned<LiveInputWrapper>(
318 L, "LiveInputWrapper", theme, chain, (*capture)->get_current_pixel_format(),
319 /*override_bounce=*/false, /*deinterlace=*/false, /*user_connectable=*/false);
321 Theme *theme = get_theme_updata(L);
322 LiveInputWrapper **live_input = (LiveInputWrapper **)lua_touserdata(L, -1);
323 theme->register_html_signal_connection(chain, *live_input, *capture);
329 int EffectChain_add_effect(lua_State* L)
331 assert(lua_gettop(L) >= 2);
332 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
334 // TODO: Better error reporting.
335 Effect *effect = get_effect(L, 2);
336 if (lua_gettop(L) == 2) {
337 if (effect->num_inputs() == 0) {
338 chain->add_input((Input *)effect);
340 chain->add_effect(effect);
343 vector<Effect *> inputs;
344 for (int idx = 3; idx <= lua_gettop(L); ++idx) {
345 if (luaL_testudata(L, idx, "LiveInputWrapper")) {
346 LiveInputWrapper **input = (LiveInputWrapper **)lua_touserdata(L, idx);
347 inputs.push_back((*input)->get_effect());
349 inputs.push_back(get_effect(L, idx));
352 chain->add_effect(effect, inputs);
355 lua_settop(L, 2); // Return the effect itself.
357 // Make sure Lua doesn't garbage-collect it away.
358 lua_pushvalue(L, -1);
359 luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak?
364 int EffectChain_finalize(lua_State* L)
366 assert(lua_gettop(L) == 2);
367 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
368 bool is_main_chain = checkbool(L, 2);
370 // Add outputs as needed.
371 // NOTE: If you change any details about the output format, you will need to
372 // also update what's given to the muxer (HTTPD::Mux constructor) and
373 // what's put in the H.264 stream (sps_rbsp()).
374 ImageFormat inout_format;
375 inout_format.color_space = COLORSPACE_REC_709;
377 // Output gamma is tricky. We should output Rec. 709 for TV, except that
378 // we expect to run with web players and others that don't really care and
379 // just output with no conversion. So that means we'll need to output sRGB,
380 // even though H.264 has no setting for that (we use “unspecified”).
381 inout_format.gamma_curve = GAMMA_sRGB;
384 YCbCrFormat output_ycbcr_format;
385 // We actually output 4:2:0 and/or 4:2:2 in the end, but chroma subsampling
386 // happens in a pass not run by Movit (see ChromaSubsampler::subsample_chroma()).
387 output_ycbcr_format.chroma_subsampling_x = 1;
388 output_ycbcr_format.chroma_subsampling_y = 1;
390 // This will be overridden if HDMI/SDI output is in force.
391 if (global_flags.ycbcr_rec709_coefficients) {
392 output_ycbcr_format.luma_coefficients = YCBCR_REC_709;
394 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
397 output_ycbcr_format.full_range = false;
398 output_ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
400 GLenum type = global_flags.x264_bit_depth > 8 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_BYTE;
402 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR, type);
404 // If we're using zerocopy video encoding (so the destination
405 // Y texture is owned by VA-API and will be unavailable for
406 // display), add a copy, where we'll only be using the Y component.
407 if (global_flags.use_zerocopy) {
408 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.
410 chain->set_dither_bits(global_flags.x264_bit_depth > 8 ? 16 : 8);
411 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
413 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
420 int LiveInputWrapper_connect_signal(lua_State* L)
422 assert(lua_gettop(L) == 2);
423 LiveInputWrapper **input = (LiveInputWrapper **)luaL_checkudata(L, 1, "LiveInputWrapper");
424 int signal_num = luaL_checknumber(L, 2);
425 bool success = (*input)->connect_signal(signal_num);
428 lua_getstack(L, 1, &ar);
429 lua_getinfo(L, "nSl", &ar);
430 fprintf(stderr, "ERROR: %s:%d: Calling connect_signal() on a video or HTML input. Ignoring.\n",
431 ar.source, ar.currentline);
436 int ImageInput_new(lua_State* L)
438 assert(lua_gettop(L) == 1);
439 string filename = checkstdstring(L, 1);
440 return wrap_lua_object_nonowned<ImageInput>(L, "ImageInput", filename);
443 int VideoInput_new(lua_State* L)
445 assert(lua_gettop(L) == 2);
446 string filename = checkstdstring(L, 1);
447 int pixel_format = luaL_checknumber(L, 2);
448 if (pixel_format != bmusb::PixelFormat_8BitYCbCrPlanar &&
449 pixel_format != bmusb::PixelFormat_8BitBGRA) {
450 fprintf(stderr, "WARNING: Invalid enum %d used for video format, choosing Y'CbCr.\n",
452 pixel_format = bmusb::PixelFormat_8BitYCbCrPlanar;
454 int ret = wrap_lua_object_nonowned<FFmpegCapture>(L, "VideoInput", filename, global_flags.width, global_flags.height);
456 FFmpegCapture **capture = (FFmpegCapture **)lua_touserdata(L, -1);
457 (*capture)->set_pixel_format(bmusb::PixelFormat(pixel_format));
459 Theme *theme = get_theme_updata(L);
460 theme->register_video_input(*capture);
465 int VideoInput_rewind(lua_State* L)
467 assert(lua_gettop(L) == 1);
468 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
469 (*video_input)->rewind();
473 int VideoInput_disconnect(lua_State* L)
475 assert(lua_gettop(L) == 1);
476 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
477 (*video_input)->disconnect();
481 int VideoInput_change_rate(lua_State* L)
483 assert(lua_gettop(L) == 2);
484 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
485 double new_rate = luaL_checknumber(L, 2);
486 (*video_input)->change_rate(new_rate);
490 int VideoInput_get_signal_num(lua_State* L)
492 assert(lua_gettop(L) == 1);
493 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
494 lua_pushnumber(L, -1 - (*video_input)->get_card_index());
498 int HTMLInput_new(lua_State* L)
501 assert(lua_gettop(L) == 1);
502 string url = checkstdstring(L, 1);
503 int ret = wrap_lua_object_nonowned<CEFCapture>(L, "HTMLInput", url, global_flags.width, global_flags.height);
505 CEFCapture **capture = (CEFCapture **)lua_touserdata(L, -1);
506 Theme *theme = get_theme_updata(L);
507 theme->register_html_input(*capture);
511 fprintf(stderr, "This version of Nageru has been compiled without CEF support.\n");
512 fprintf(stderr, "HTMLInput is not available.\n");
518 int HTMLInput_set_url(lua_State* L)
520 assert(lua_gettop(L) == 2);
521 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
522 string new_url = checkstdstring(L, 2);
523 (*video_input)->set_url(new_url);
527 int HTMLInput_reload(lua_State* L)
529 assert(lua_gettop(L) == 1);
530 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
531 (*video_input)->reload();
535 int HTMLInput_set_max_fps(lua_State* L)
537 assert(lua_gettop(L) == 2);
538 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
539 int max_fps = lrint(luaL_checknumber(L, 2));
540 (*video_input)->set_max_fps(max_fps);
544 int HTMLInput_execute_javascript_async(lua_State* L)
546 assert(lua_gettop(L) == 2);
547 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
548 string js = checkstdstring(L, 2);
549 (*video_input)->execute_javascript_async(js);
553 int HTMLInput_resize(lua_State* L)
555 assert(lua_gettop(L) == 3);
556 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
557 unsigned width = lrint(luaL_checknumber(L, 2));
558 unsigned height = lrint(luaL_checknumber(L, 3));
559 (*video_input)->resize(width, height);
563 int HTMLInput_get_signal_num(lua_State* L)
565 assert(lua_gettop(L) == 1);
566 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
567 lua_pushnumber(L, -1 - (*video_input)->get_card_index());
572 int WhiteBalanceEffect_new(lua_State* L)
574 assert(lua_gettop(L) == 0);
575 return wrap_lua_object_nonowned<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
578 int ResampleEffect_new(lua_State* L)
580 assert(lua_gettop(L) == 0);
581 return wrap_lua_object_nonowned<ResampleEffect>(L, "ResampleEffect");
584 int PaddingEffect_new(lua_State* L)
586 assert(lua_gettop(L) == 0);
587 return wrap_lua_object_nonowned<PaddingEffect>(L, "PaddingEffect");
590 int IntegralPaddingEffect_new(lua_State* L)
592 assert(lua_gettop(L) == 0);
593 return wrap_lua_object_nonowned<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
596 int OverlayEffect_new(lua_State* L)
598 assert(lua_gettop(L) == 0);
599 return wrap_lua_object_nonowned<OverlayEffect>(L, "OverlayEffect");
602 int ResizeEffect_new(lua_State* L)
604 assert(lua_gettop(L) == 0);
605 return wrap_lua_object_nonowned<ResizeEffect>(L, "ResizeEffect");
608 int MultiplyEffect_new(lua_State* L)
610 assert(lua_gettop(L) == 0);
611 return wrap_lua_object_nonowned<MultiplyEffect>(L, "MultiplyEffect");
614 int MixEffect_new(lua_State* L)
616 assert(lua_gettop(L) == 0);
617 return wrap_lua_object_nonowned<MixEffect>(L, "MixEffect");
620 int InputStateInfo_get_width(lua_State* L)
622 assert(lua_gettop(L) == 2);
623 InputStateInfo *input_state_info = get_input_state_info(L, 1);
624 Theme *theme = get_theme_updata(L);
625 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
626 lua_pushnumber(L, input_state_info->last_width[signal_num]);
630 int InputStateInfo_get_height(lua_State* L)
632 assert(lua_gettop(L) == 2);
633 InputStateInfo *input_state_info = get_input_state_info(L, 1);
634 Theme *theme = get_theme_updata(L);
635 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
636 lua_pushnumber(L, input_state_info->last_height[signal_num]);
640 int InputStateInfo_get_interlaced(lua_State* L)
642 assert(lua_gettop(L) == 2);
643 InputStateInfo *input_state_info = get_input_state_info(L, 1);
644 Theme *theme = get_theme_updata(L);
645 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
646 lua_pushboolean(L, input_state_info->last_interlaced[signal_num]);
650 int InputStateInfo_get_has_signal(lua_State* L)
652 assert(lua_gettop(L) == 2);
653 InputStateInfo *input_state_info = get_input_state_info(L, 1);
654 Theme *theme = get_theme_updata(L);
655 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
656 lua_pushboolean(L, input_state_info->last_has_signal[signal_num]);
660 int InputStateInfo_get_is_connected(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 signal_num = theme->map_signal(luaL_checknumber(L, 2));
666 lua_pushboolean(L, input_state_info->last_is_connected[signal_num]);
670 int InputStateInfo_get_frame_rate_nom(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 signal_num = theme->map_signal(luaL_checknumber(L, 2));
676 lua_pushnumber(L, input_state_info->last_frame_rate_nom[signal_num]);
680 int InputStateInfo_get_frame_rate_den(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 signal_num = theme->map_signal(luaL_checknumber(L, 2));
686 lua_pushnumber(L, input_state_info->last_frame_rate_den[signal_num]);
690 int Effect_set_float(lua_State *L)
692 assert(lua_gettop(L) == 3);
693 Effect *effect = (Effect *)get_effect(L, 1);
694 string key = checkstdstring(L, 2);
695 float value = luaL_checknumber(L, 3);
696 if (!effect->set_float(key, value)) {
697 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
702 int Effect_set_int(lua_State *L)
704 assert(lua_gettop(L) == 3);
705 Effect *effect = (Effect *)get_effect(L, 1);
706 string key = checkstdstring(L, 2);
707 float value = luaL_checknumber(L, 3);
708 if (!effect->set_int(key, value)) {
709 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
714 int Effect_set_vec3(lua_State *L)
716 assert(lua_gettop(L) == 5);
717 Effect *effect = (Effect *)get_effect(L, 1);
718 string key = checkstdstring(L, 2);
720 v[0] = luaL_checknumber(L, 3);
721 v[1] = luaL_checknumber(L, 4);
722 v[2] = luaL_checknumber(L, 5);
723 if (!effect->set_vec3(key, v)) {
724 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", key.c_str(),
730 int Effect_set_vec4(lua_State *L)
732 assert(lua_gettop(L) == 6);
733 Effect *effect = (Effect *)get_effect(L, 1);
734 string key = checkstdstring(L, 2);
736 v[0] = luaL_checknumber(L, 3);
737 v[1] = luaL_checknumber(L, 4);
738 v[2] = luaL_checknumber(L, 5);
739 v[3] = luaL_checknumber(L, 6);
740 if (!effect->set_vec4(key, v)) {
741 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", key.c_str(),
742 v[0], v[1], v[2], v[3]);
747 const luaL_Reg EffectChain_funcs[] = {
748 { "new", EffectChain_new },
749 { "__gc", EffectChain_gc },
750 { "add_live_input", EffectChain_add_live_input },
751 { "add_video_input", EffectChain_add_video_input },
753 { "add_html_input", EffectChain_add_html_input },
755 { "add_effect", EffectChain_add_effect },
756 { "finalize", EffectChain_finalize },
760 const luaL_Reg LiveInputWrapper_funcs[] = {
761 { "connect_signal", LiveInputWrapper_connect_signal },
765 const luaL_Reg ImageInput_funcs[] = {
766 { "new", ImageInput_new },
767 { "set_float", Effect_set_float },
768 { "set_int", Effect_set_int },
769 { "set_vec3", Effect_set_vec3 },
770 { "set_vec4", Effect_set_vec4 },
774 const luaL_Reg VideoInput_funcs[] = {
775 { "new", VideoInput_new },
776 { "rewind", VideoInput_rewind },
777 { "disconnect", VideoInput_disconnect },
778 { "change_rate", VideoInput_change_rate },
779 { "get_signal_num", VideoInput_get_signal_num },
783 const luaL_Reg HTMLInput_funcs[] = {
784 { "new", HTMLInput_new },
786 { "set_url", HTMLInput_set_url },
787 { "reload", HTMLInput_reload },
788 { "set_max_fps", HTMLInput_set_max_fps },
789 { "execute_javascript_async", HTMLInput_execute_javascript_async },
790 { "resize", HTMLInput_resize },
791 { "get_signal_num", HTMLInput_get_signal_num },
796 const luaL_Reg WhiteBalanceEffect_funcs[] = {
797 { "new", WhiteBalanceEffect_new },
798 { "set_float", Effect_set_float },
799 { "set_int", Effect_set_int },
800 { "set_vec3", Effect_set_vec3 },
801 { "set_vec4", Effect_set_vec4 },
805 const luaL_Reg ResampleEffect_funcs[] = {
806 { "new", ResampleEffect_new },
807 { "set_float", Effect_set_float },
808 { "set_int", Effect_set_int },
809 { "set_vec3", Effect_set_vec3 },
810 { "set_vec4", Effect_set_vec4 },
814 const luaL_Reg PaddingEffect_funcs[] = {
815 { "new", PaddingEffect_new },
816 { "set_float", Effect_set_float },
817 { "set_int", Effect_set_int },
818 { "set_vec3", Effect_set_vec3 },
819 { "set_vec4", Effect_set_vec4 },
823 const luaL_Reg IntegralPaddingEffect_funcs[] = {
824 { "new", IntegralPaddingEffect_new },
825 { "set_float", Effect_set_float },
826 { "set_int", Effect_set_int },
827 { "set_vec3", Effect_set_vec3 },
828 { "set_vec4", Effect_set_vec4 },
832 const luaL_Reg OverlayEffect_funcs[] = {
833 { "new", OverlayEffect_new },
834 { "set_float", Effect_set_float },
835 { "set_int", Effect_set_int },
836 { "set_vec3", Effect_set_vec3 },
837 { "set_vec4", Effect_set_vec4 },
841 const luaL_Reg ResizeEffect_funcs[] = {
842 { "new", ResizeEffect_new },
843 { "set_float", Effect_set_float },
844 { "set_int", Effect_set_int },
845 { "set_vec3", Effect_set_vec3 },
846 { "set_vec4", Effect_set_vec4 },
850 const luaL_Reg MultiplyEffect_funcs[] = {
851 { "new", MultiplyEffect_new },
852 { "set_float", Effect_set_float },
853 { "set_int", Effect_set_int },
854 { "set_vec3", Effect_set_vec3 },
855 { "set_vec4", Effect_set_vec4 },
859 const luaL_Reg MixEffect_funcs[] = {
860 { "new", MixEffect_new },
861 { "set_float", Effect_set_float },
862 { "set_int", Effect_set_int },
863 { "set_vec3", Effect_set_vec3 },
864 { "set_vec4", Effect_set_vec4 },
868 const luaL_Reg InputStateInfo_funcs[] = {
869 { "get_width", InputStateInfo_get_width },
870 { "get_height", InputStateInfo_get_height },
871 { "get_interlaced", InputStateInfo_get_interlaced },
872 { "get_has_signal", InputStateInfo_get_has_signal },
873 { "get_is_connected", InputStateInfo_get_is_connected },
874 { "get_frame_rate_nom", InputStateInfo_get_frame_rate_nom },
875 { "get_frame_rate_den", InputStateInfo_get_frame_rate_den },
879 const luaL_Reg ThemeMenu_funcs[] = {
880 { "set", ThemeMenu_set },
886 LiveInputWrapper::LiveInputWrapper(
889 bmusb::PixelFormat pixel_format,
890 bool override_bounce,
892 bool user_connectable)
894 pixel_format(pixel_format),
895 deinterlace(deinterlace),
896 user_connectable(user_connectable)
898 ImageFormat inout_format;
899 inout_format.color_space = COLORSPACE_sRGB;
901 // Gamma curve depends on the input signal, and we don't really get any
902 // indications. A camera would be expected to do Rec. 709, but
903 // I haven't checked if any do in practice. However, computers _do_ output
904 // in sRGB gamma (ie., they don't convert from sRGB to Rec. 709), and
905 // I wouldn't really be surprised if most non-professional cameras do, too.
906 // So we pick sRGB as the least evil here.
907 inout_format.gamma_curve = GAMMA_sRGB;
911 deinterlace_effect = new movit::DeinterlaceEffect();
913 // As per the comments in deinterlace_effect.h, we turn this off.
914 // The most likely interlaced input for us is either a camera
915 // (where it's fine to turn it off) or a laptop (where it _should_
917 CHECK(deinterlace_effect->set_int("enable_spatial_interlacing_check", 0));
919 num_inputs = deinterlace_effect->num_inputs();
920 assert(num_inputs == FRAME_HISTORY_LENGTH);
925 if (pixel_format == bmusb::PixelFormat_8BitBGRA) {
926 for (unsigned i = 0; i < num_inputs; ++i) {
927 // We upload our textures ourselves, and Movit swaps
928 // R and B in the shader if we specify BGRA, so lie and say RGBA.
929 if (global_flags.can_disable_srgb_decoder) {
930 rgba_inputs.push_back(new sRGBSwitchingFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
932 rgba_inputs.push_back(new NonsRGBCapableFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
934 chain->add_input(rgba_inputs.back());
938 vector<Effect *> reverse_inputs(rgba_inputs.rbegin(), rgba_inputs.rend());
939 chain->add_effect(deinterlace_effect, reverse_inputs);
942 assert(pixel_format == bmusb::PixelFormat_8BitYCbCr ||
943 pixel_format == bmusb::PixelFormat_10BitYCbCr ||
944 pixel_format == bmusb::PixelFormat_8BitYCbCrPlanar);
946 // Most of these settings will be overridden later if using PixelFormat_8BitYCbCrPlanar.
947 input_ycbcr_format.chroma_subsampling_x = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1 : 2;
948 input_ycbcr_format.chroma_subsampling_y = 1;
949 input_ycbcr_format.num_levels = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1024 : 256;
950 input_ycbcr_format.cb_x_position = 0.0;
951 input_ycbcr_format.cr_x_position = 0.0;
952 input_ycbcr_format.cb_y_position = 0.5;
953 input_ycbcr_format.cr_y_position = 0.5;
954 input_ycbcr_format.luma_coefficients = YCBCR_REC_709; // Will be overridden later even if not planar.
955 input_ycbcr_format.full_range = false; // Will be overridden later even if not planar.
957 for (unsigned i = 0; i < num_inputs; ++i) {
958 // When using 10-bit input, we're converting to interleaved through v210Converter.
959 YCbCrInputSplitting splitting;
960 if (pixel_format == bmusb::PixelFormat_10BitYCbCr) {
961 splitting = YCBCR_INPUT_INTERLEAVED;
962 } else if (pixel_format == bmusb::PixelFormat_8BitYCbCr) {
963 splitting = YCBCR_INPUT_SPLIT_Y_AND_CBCR;
965 splitting = YCBCR_INPUT_PLANAR;
967 if (override_bounce) {
968 ycbcr_inputs.push_back(new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
970 ycbcr_inputs.push_back(new YCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
972 chain->add_input(ycbcr_inputs.back());
976 vector<Effect *> reverse_inputs(ycbcr_inputs.rbegin(), ycbcr_inputs.rend());
977 chain->add_effect(deinterlace_effect, reverse_inputs);
982 bool LiveInputWrapper::connect_signal(int signal_num)
984 if (!user_connectable) {
988 if (global_mixer == nullptr) {
993 signal_num = theme->map_signal(signal_num);
994 connect_signal_raw(signal_num, *theme->input_state);
998 void LiveInputWrapper::connect_signal_raw(int signal_num, const InputState &input_state)
1000 BufferedFrame first_frame = input_state.buffered_frames[signal_num][0];
1001 if (first_frame.frame == nullptr) {
1005 unsigned width, height;
1007 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)first_frame.frame->userdata;
1008 width = userdata->last_width[first_frame.field_number];
1009 height = userdata->last_height[first_frame.field_number];
1010 if (userdata->last_interlaced) {
1015 movit::YCbCrLumaCoefficients ycbcr_coefficients = input_state.ycbcr_coefficients[signal_num];
1016 bool full_range = input_state.full_range[signal_num];
1018 if (input_state.ycbcr_coefficients_auto[signal_num]) {
1021 // The Blackmagic driver docs claim that the device outputs Y'CbCr
1022 // according to Rec. 601, but this seems to indicate the subsampling
1023 // positions only, as they publish Y'CbCr → RGB formulas that are
1024 // different for HD and SD (corresponding to Rec. 709 and 601, respectively),
1025 // and a Lenovo X1 gen 3 I used to test definitely outputs Rec. 709
1026 // (at least up to rounding error). Other devices seem to use Rec. 601
1027 // even on HD resolutions. Nevertheless, Rec. 709 _is_ the right choice
1028 // for HD, so we default to that if the user hasn't set anything.
1029 if (height >= 720) {
1030 ycbcr_coefficients = YCBCR_REC_709;
1032 ycbcr_coefficients = YCBCR_REC_601;
1036 // This is a global, but it doesn't really matter.
1037 input_ycbcr_format.luma_coefficients = ycbcr_coefficients;
1038 input_ycbcr_format.full_range = full_range;
1040 BufferedFrame last_good_frame = first_frame;
1041 for (unsigned i = 0; i < max(ycbcr_inputs.size(), rgba_inputs.size()); ++i) {
1042 BufferedFrame frame = input_state.buffered_frames[signal_num][i];
1043 if (frame.frame == nullptr) {
1044 // Not enough data; reuse last frame (well, field).
1045 // This is suboptimal, but we have nothing better.
1046 frame = last_good_frame;
1048 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
1050 unsigned this_width = userdata->last_width[frame.field_number];
1051 unsigned this_height = userdata->last_height[frame.field_number];
1052 if (this_width != width || this_height != height) {
1053 // Resolution changed; reuse last frame/field.
1054 frame = last_good_frame;
1055 userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
1058 assert(userdata->pixel_format == pixel_format);
1059 switch (pixel_format) {
1060 case bmusb::PixelFormat_8BitYCbCr:
1061 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
1062 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cbcr[frame.field_number]);
1063 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
1064 ycbcr_inputs[i]->set_width(width);
1065 ycbcr_inputs[i]->set_height(height);
1067 case bmusb::PixelFormat_8BitYCbCrPlanar:
1068 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
1069 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cb[frame.field_number]);
1070 ycbcr_inputs[i]->set_texture_num(2, userdata->tex_cr[frame.field_number]);
1071 ycbcr_inputs[i]->change_ycbcr_format(userdata->ycbcr_format);
1072 ycbcr_inputs[i]->set_width(width);
1073 ycbcr_inputs[i]->set_height(height);
1075 case bmusb::PixelFormat_10BitYCbCr:
1076 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_444[frame.field_number]);
1077 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
1078 ycbcr_inputs[i]->set_width(width);
1079 ycbcr_inputs[i]->set_height(height);
1081 case bmusb::PixelFormat_8BitBGRA:
1082 rgba_inputs[i]->set_texture_num(userdata->tex_rgba[frame.field_number]);
1083 rgba_inputs[i]->set_width(width);
1084 rgba_inputs[i]->set_height(height);
1090 last_good_frame = frame;
1094 BufferedFrame frame = input_state.buffered_frames[signal_num][0];
1095 CHECK(deinterlace_effect->set_int("current_field_position", frame.field_number));
1101 int call_num_channels(lua_State *L)
1103 lua_getglobal(L, "num_channels");
1105 if (lua_pcall(L, 0, 1, 0) != 0) {
1106 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
1110 int num_channels = luaL_checknumber(L, 1);
1112 assert(lua_gettop(L) == 0);
1113 return num_channels;
1118 Theme::Theme(const string &filename, const vector<string> &search_dirs, ResourcePool *resource_pool, unsigned num_cards)
1119 : resource_pool(resource_pool), num_cards(num_cards), signal_to_card_mapping(global_flags.default_stream_mapping)
1121 L = luaL_newstate();
1124 // Search through all directories until we find a file that will load
1125 // (as in, does not return LUA_ERRFILE); then run it. We store load errors
1126 // from all the attempts, and show them once we know we can't find any of them.
1128 vector<string> errors;
1129 bool success = false;
1131 vector<string> real_search_dirs;
1132 if (!filename.empty() && filename[0] == '/') {
1133 real_search_dirs.push_back("");
1135 real_search_dirs = search_dirs;
1140 for (const string &dir : real_search_dirs) {
1144 path = dir + "/" + filename;
1146 int err = luaL_loadfile(L, path.c_str());
1148 // Save the theme for when we're actually going to run it
1149 // (we need to set up the right environment below first,
1150 // and we couldn't do that before, because we didn't know the
1151 // path to put in Nageru.THEME_PATH).
1152 theme_code_ref = luaL_ref(L, LUA_REGISTRYINDEX);
1153 assert(lua_gettop(L) == 0);
1158 errors.push_back(lua_tostring(L, -1));
1160 if (err != LUA_ERRFILE) {
1161 // The file actually loaded, but failed to parse somehow. Abort; don't try the next one.
1167 for (const string &error : errors) {
1168 fprintf(stderr, "%s\n", error.c_str());
1172 assert(lua_gettop(L) == 0);
1174 // Make sure the path exposed to the theme (as Nageru.THEME_PATH;
1175 // can be useful for locating files when talking to CEF) is absolute.
1176 // In a sense, it would be nice if realpath() had a mode not to
1177 // resolve symlinks, but it doesn't, so we only call it if we don't
1178 // already have an absolute path (which may leave ../ elements etc.).
1179 if (path[0] == '/') {
1182 char *absolute_theme_path = realpath(path.c_str(), nullptr);
1183 theme_path = absolute_theme_path;
1184 free(absolute_theme_path);
1187 // Set up the API we provide.
1188 register_constants();
1189 register_class("EffectChain", EffectChain_funcs);
1190 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
1191 register_class("ImageInput", ImageInput_funcs);
1192 register_class("VideoInput", VideoInput_funcs);
1193 register_class("HTMLInput", HTMLInput_funcs);
1194 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
1195 register_class("ResampleEffect", ResampleEffect_funcs);
1196 register_class("PaddingEffect", PaddingEffect_funcs);
1197 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
1198 register_class("OverlayEffect", OverlayEffect_funcs);
1199 register_class("ResizeEffect", ResizeEffect_funcs);
1200 register_class("MultiplyEffect", MultiplyEffect_funcs);
1201 register_class("MixEffect", MixEffect_funcs);
1202 register_class("InputStateInfo", InputStateInfo_funcs);
1203 register_class("ThemeMenu", ThemeMenu_funcs);
1205 // Now actually run the theme to get everything set up.
1206 lua_rawgeti(L, LUA_REGISTRYINDEX, theme_code_ref);
1207 luaL_unref(L, LUA_REGISTRYINDEX, theme_code_ref);
1208 if (lua_pcall(L, 0, 0, 0)) {
1209 fprintf(stderr, "Error when running %s: %s\n", path.c_str(), lua_tostring(L, -1));
1212 assert(lua_gettop(L) == 0);
1214 // Ask it for the number of channels.
1215 num_channels = call_num_channels(L);
1223 void Theme::register_constants()
1225 // Set Nageru.VIDEO_FORMAT_BGRA = bmusb::PixelFormat_8BitBGRA, etc.
1226 const vector<pair<string, int>> num_constants = {
1227 { "VIDEO_FORMAT_BGRA", bmusb::PixelFormat_8BitBGRA },
1228 { "VIDEO_FORMAT_YCBCR", bmusb::PixelFormat_8BitYCbCrPlanar },
1230 const vector<pair<string, string>> str_constants = {
1231 { "THEME_PATH", theme_path },
1234 lua_newtable(L); // t = {}
1236 for (const pair<string, int> &constant : num_constants) {
1237 lua_pushstring(L, constant.first.c_str());
1238 lua_pushinteger(L, constant.second);
1239 lua_settable(L, 1); // t[key] = value
1241 for (const pair<string, string> &constant : str_constants) {
1242 lua_pushstring(L, constant.first.c_str());
1243 lua_pushstring(L, constant.second.c_str());
1244 lua_settable(L, 1); // t[key] = value
1247 lua_setglobal(L, "Nageru"); // Nageru = t
1248 assert(lua_gettop(L) == 0);
1251 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
1253 assert(lua_gettop(L) == 0);
1254 luaL_newmetatable(L, class_name); // mt = {}
1255 lua_pushlightuserdata(L, this);
1256 luaL_setfuncs(L, funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
1257 lua_pushvalue(L, -1);
1258 lua_setfield(L, -2, "__index"); // mt.__index = mt
1259 lua_setglobal(L, class_name); // ClassName = mt
1260 assert(lua_gettop(L) == 0);
1263 Theme::Chain Theme::get_chain(unsigned num, float t, unsigned width, unsigned height, InputState input_state)
1267 unique_lock<mutex> lock(m);
1268 assert(lua_gettop(L) == 0);
1269 lua_getglobal(L, "get_chain"); /* function to be called */
1270 lua_pushnumber(L, num);
1271 lua_pushnumber(L, t);
1272 lua_pushnumber(L, width);
1273 lua_pushnumber(L, height);
1274 wrap_lua_object<InputStateInfo>(L, "InputStateInfo", input_state);
1276 if (lua_pcall(L, 5, 2, 0) != 0) {
1277 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
1281 EffectChain *effect_chain = (EffectChain *)luaL_testudata(L, -2, "EffectChain");
1282 if (effect_chain == nullptr) {
1283 fprintf(stderr, "get_chain() for chain number %d did not return an EffectChain\n",
1287 chain.chain = effect_chain;
1288 if (!lua_isfunction(L, -1)) {
1289 fprintf(stderr, "Argument #-1 should be a function\n");
1292 lua_pushvalue(L, -1);
1293 shared_ptr<LuaRefWithDeleter> funcref(new LuaRefWithDeleter(&m, L, luaL_ref(L, LUA_REGISTRYINDEX)));
1295 assert(lua_gettop(L) == 0);
1297 chain.setup_chain = [this, funcref, input_state, effect_chain]{
1298 unique_lock<mutex> lock(m);
1300 assert(this->input_state == nullptr);
1301 this->input_state = &input_state;
1303 // Set up state, including connecting signals.
1304 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref->get());
1305 if (lua_pcall(L, 0, 0, 0) != 0) {
1306 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
1309 assert(lua_gettop(L) == 0);
1311 // The theme can't (or at least shouldn't!) call connect_signal() on
1312 // each FFmpeg or CEF input, so we'll do it here.
1313 if (video_signal_connections.count(effect_chain)) {
1314 for (const VideoSignalConnection &conn : video_signal_connections[effect_chain]) {
1315 conn.wrapper->connect_signal_raw(conn.source->get_card_index(), input_state);
1319 if (html_signal_connections.count(effect_chain)) {
1320 for (const CEFSignalConnection &conn : html_signal_connections[effect_chain]) {
1321 conn.wrapper->connect_signal_raw(conn.source->get_card_index(), input_state);
1326 this->input_state = nullptr;
1329 // TODO: Can we do better, e.g. by running setup_chain() and seeing what it references?
1330 // Actually, setup_chain does maybe hold all the references we need now anyway?
1331 chain.input_frames.reserve(num_cards * FRAME_HISTORY_LENGTH);
1332 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
1333 for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
1334 chain.input_frames.push_back(input_state.buffered_frames[card_index][frame_num].frame);
1341 string Theme::get_channel_name(unsigned channel)
1343 unique_lock<mutex> lock(m);
1344 lua_getglobal(L, "channel_name");
1345 lua_pushnumber(L, channel);
1346 if (lua_pcall(L, 1, 1, 0) != 0) {
1347 fprintf(stderr, "error running function `channel_name': %s\n", lua_tostring(L, -1));
1350 const char *ret = lua_tostring(L, -1);
1351 if (ret == nullptr) {
1352 fprintf(stderr, "function `channel_name' returned nil for channel %d\n", channel);
1356 string retstr = ret;
1358 assert(lua_gettop(L) == 0);
1362 int Theme::get_channel_signal(unsigned channel)
1364 unique_lock<mutex> lock(m);
1365 lua_getglobal(L, "channel_signal");
1366 lua_pushnumber(L, channel);
1367 if (lua_pcall(L, 1, 1, 0) != 0) {
1368 fprintf(stderr, "error running function `channel_signal': %s\n", lua_tostring(L, -1));
1372 int ret = luaL_checknumber(L, 1);
1374 assert(lua_gettop(L) == 0);
1378 std::string Theme::get_channel_color(unsigned channel)
1380 unique_lock<mutex> lock(m);
1381 lua_getglobal(L, "channel_color");
1382 lua_pushnumber(L, channel);
1383 if (lua_pcall(L, 1, 1, 0) != 0) {
1384 fprintf(stderr, "error running function `channel_color': %s\n", lua_tostring(L, -1));
1388 const char *ret = lua_tostring(L, -1);
1389 if (ret == nullptr) {
1390 fprintf(stderr, "function `channel_color' returned nil for channel %d\n", channel);
1394 string retstr = ret;
1396 assert(lua_gettop(L) == 0);
1400 bool Theme::get_supports_set_wb(unsigned channel)
1402 unique_lock<mutex> lock(m);
1403 lua_getglobal(L, "supports_set_wb");
1404 lua_pushnumber(L, channel);
1405 if (lua_pcall(L, 1, 1, 0) != 0) {
1406 fprintf(stderr, "error running function `supports_set_wb': %s\n", lua_tostring(L, -1));
1410 bool ret = checkbool(L, -1);
1412 assert(lua_gettop(L) == 0);
1416 void Theme::set_wb(unsigned channel, double r, double g, double b)
1418 unique_lock<mutex> lock(m);
1419 lua_getglobal(L, "set_wb");
1420 lua_pushnumber(L, channel);
1421 lua_pushnumber(L, r);
1422 lua_pushnumber(L, g);
1423 lua_pushnumber(L, b);
1424 if (lua_pcall(L, 4, 0, 0) != 0) {
1425 fprintf(stderr, "error running function `set_wb': %s\n", lua_tostring(L, -1));
1429 assert(lua_gettop(L) == 0);
1432 vector<string> Theme::get_transition_names(float t)
1434 unique_lock<mutex> lock(m);
1435 lua_getglobal(L, "get_transitions");
1436 lua_pushnumber(L, t);
1437 if (lua_pcall(L, 1, 1, 0) != 0) {
1438 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
1444 while (lua_next(L, -2) != 0) {
1445 ret.push_back(lua_tostring(L, -1));
1449 assert(lua_gettop(L) == 0);
1453 int Theme::map_signal(int signal_num)
1455 // Negative numbers map to raw signals.
1456 if (signal_num < 0) {
1457 return -1 - signal_num;
1460 unique_lock<mutex> lock(map_m);
1461 if (signal_to_card_mapping.count(signal_num)) {
1462 return signal_to_card_mapping[signal_num];
1466 if (global_flags.output_card != -1 && num_cards > 1) {
1467 // Try to exclude the output card from the default card_index.
1468 card_index = signal_num % (num_cards - 1);
1469 if (card_index >= global_flags.output_card) {
1472 if (signal_num >= int(num_cards - 1)) {
1473 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u input card(s) (card %d is busy with output).\n",
1474 signal_num, num_cards - 1, global_flags.output_card);
1475 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1478 card_index = signal_num % num_cards;
1479 if (signal_num >= int(num_cards)) {
1480 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u card(s).\n", signal_num, num_cards);
1481 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1484 signal_to_card_mapping[signal_num] = card_index;
1488 void Theme::set_signal_mapping(int signal_num, int card_num)
1490 unique_lock<mutex> lock(map_m);
1491 assert(card_num < int(num_cards));
1492 signal_to_card_mapping[signal_num] = card_num;
1495 void Theme::transition_clicked(int transition_num, float t)
1497 unique_lock<mutex> lock(m);
1498 lua_getglobal(L, "transition_clicked");
1499 lua_pushnumber(L, transition_num);
1500 lua_pushnumber(L, t);
1502 if (lua_pcall(L, 2, 0, 0) != 0) {
1503 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
1506 assert(lua_gettop(L) == 0);
1509 void Theme::channel_clicked(int preview_num)
1511 unique_lock<mutex> lock(m);
1512 lua_getglobal(L, "channel_clicked");
1513 lua_pushnumber(L, preview_num);
1515 if (lua_pcall(L, 1, 0, 0) != 0) {
1516 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
1519 assert(lua_gettop(L) == 0);
1522 int Theme::set_theme_menu(lua_State *L)
1524 for (const Theme::MenuEntry &entry : theme_menu) {
1525 luaL_unref(L, LUA_REGISTRYINDEX, entry.lua_ref);
1529 int num_elements = lua_gettop(L);
1530 for (int i = 1; i <= num_elements; ++i) {
1531 lua_rawgeti(L, i, 1);
1532 const string text = checkstdstring(L, -1);
1535 lua_rawgeti(L, i, 2);
1536 luaL_checktype(L, -1, LUA_TFUNCTION);
1537 int ref = luaL_ref(L, LUA_REGISTRYINDEX);
1539 theme_menu.push_back(MenuEntry{ text, ref });
1541 lua_pop(L, num_elements);
1542 assert(lua_gettop(L) == 0);
1544 if (theme_menu_callback != nullptr) {
1545 theme_menu_callback();
1551 void Theme::theme_menu_entry_clicked(int lua_ref)
1553 unique_lock<mutex> lock(m);
1554 lua_rawgeti(L, LUA_REGISTRYINDEX, lua_ref);
1555 if (lua_pcall(L, 0, 0, 0) != 0) {
1556 fprintf(stderr, "error running menu callback: %s\n", lua_tostring(L, -1));