4 #include <bmusb/bmusb.h>
8 #include <movit/effect.h>
9 #include <movit/effect_chain.h>
10 #include <movit/image_format.h>
11 #include <movit/mix_effect.h>
12 #include <movit/multiply_effect.h>
13 #include <movit/overlay_effect.h>
14 #include <movit/padding_effect.h>
15 #include <movit/resample_effect.h>
16 #include <movit/resize_effect.h>
17 #include <movit/util.h>
18 #include <movit/white_balance_effect.h>
19 #include <movit/ycbcr.h>
20 #include <movit/ycbcr_input.h>
29 #include "deinterlace_effect.h"
31 #include "image_input.h"
33 #include "input_state.h"
34 #include "pbo_frame_allocator.h"
43 using namespace movit;
45 extern Mixer *global_mixer;
49 // Contains basically the same data as InputState, but does not hold on to
50 // a reference to the frames. This is important so that we can release them
51 // without having to wait for Lua's GC.
52 struct InputStateInfo {
53 InputStateInfo(const InputState& input_state);
55 unsigned last_width[MAX_VIDEO_CARDS], last_height[MAX_VIDEO_CARDS];
56 bool last_interlaced[MAX_VIDEO_CARDS], last_has_signal[MAX_VIDEO_CARDS], last_is_connected[MAX_VIDEO_CARDS];
57 unsigned last_frame_rate_nom[MAX_VIDEO_CARDS], last_frame_rate_den[MAX_VIDEO_CARDS];
60 InputStateInfo::InputStateInfo(const InputState &input_state)
62 for (unsigned signal_num = 0; signal_num < MAX_VIDEO_CARDS; ++signal_num) {
63 BufferedFrame frame = input_state.buffered_frames[signal_num][0];
64 if (frame.frame == nullptr) {
65 last_width[signal_num] = last_height[signal_num] = 0;
66 last_interlaced[signal_num] = false;
67 last_has_signal[signal_num] = false;
68 last_is_connected[signal_num] = false;
71 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
72 last_width[signal_num] = userdata->last_width[frame.field_number];
73 last_height[signal_num] = userdata->last_height[frame.field_number];
74 last_interlaced[signal_num] = userdata->last_interlaced;
75 last_has_signal[signal_num] = userdata->last_has_signal;
76 last_is_connected[signal_num] = userdata->last_is_connected;
77 last_frame_rate_nom[signal_num] = userdata->last_frame_rate_nom;
78 last_frame_rate_den[signal_num] = userdata->last_frame_rate_den;
82 class LuaRefWithDeleter {
84 LuaRefWithDeleter(mutex *m, lua_State *L, int ref) : m(m), L(L), ref(ref) {}
85 ~LuaRefWithDeleter() {
86 unique_lock<mutex> lock(*m);
87 luaL_unref(L, LUA_REGISTRYINDEX, ref);
89 int get() const { return ref; }
92 LuaRefWithDeleter(const LuaRefWithDeleter &) = delete;
99 template<class T, class... Args>
100 int wrap_lua_object(lua_State* L, const char *class_name, Args&&... args)
102 // Construct the C++ object and put it on the stack.
103 void *mem = lua_newuserdata(L, sizeof(T));
104 new(mem) T(forward<Args>(args)...);
106 // Look up the metatable named <class_name>, and set it on the new object.
107 luaL_getmetatable(L, class_name);
108 lua_setmetatable(L, -2);
113 // Like wrap_lua_object, but the object is not owned by Lua; ie. it's not freed
114 // by Lua GC. This is typically the case for Effects, which are owned by EffectChain
115 // and expected to be destructed by it. The object will be of type T** instead of T*
116 // when exposed to Lua.
118 // Note that we currently leak if you allocate an Effect in this way and never call
119 // add_effect. We should see if there's a way to e.g. set __gc on it at construction time
120 // and then release that once add_effect() takes ownership.
121 template<class T, class... Args>
122 int wrap_lua_object_nonowned(lua_State* L, const char *class_name, Args&&... args)
124 // Construct the pointer ot the C++ object and put it on the stack.
125 T **obj = (T **)lua_newuserdata(L, sizeof(T *));
126 *obj = new T(forward<Args>(args)...);
128 // Look up the metatable named <class_name>, and set it on the new object.
129 luaL_getmetatable(L, class_name);
130 lua_setmetatable(L, -2);
135 Theme *get_theme_updata(lua_State* L)
137 luaL_checktype(L, lua_upvalueindex(1), LUA_TLIGHTUSERDATA);
138 return (Theme *)lua_touserdata(L, lua_upvalueindex(1));
141 Effect *get_effect(lua_State *L, int idx)
143 if (luaL_testudata(L, idx, "WhiteBalanceEffect") ||
144 luaL_testudata(L, idx, "ResampleEffect") ||
145 luaL_testudata(L, idx, "PaddingEffect") ||
146 luaL_testudata(L, idx, "IntegralPaddingEffect") ||
147 luaL_testudata(L, idx, "OverlayEffect") ||
148 luaL_testudata(L, idx, "ResizeEffect") ||
149 luaL_testudata(L, idx, "MultiplyEffect") ||
150 luaL_testudata(L, idx, "MixEffect") ||
151 luaL_testudata(L, idx, "ImageInput")) {
152 return *(Effect **)lua_touserdata(L, idx);
154 luaL_error(L, "Error: Index #%d was not an Effect type\n", idx);
158 InputStateInfo *get_input_state_info(lua_State *L, int idx)
160 if (luaL_testudata(L, idx, "InputStateInfo")) {
161 return (InputStateInfo *)lua_touserdata(L, idx);
163 luaL_error(L, "Error: Index #%d was not InputStateInfo\n", idx);
167 bool checkbool(lua_State* L, int idx)
169 luaL_checktype(L, idx, LUA_TBOOLEAN);
170 return lua_toboolean(L, idx);
173 string checkstdstring(lua_State *L, int index)
176 const char* cstr = lua_tolstring(L, index, &len);
177 return string(cstr, len);
180 int EffectChain_new(lua_State* L)
182 assert(lua_gettop(L) == 2);
183 Theme *theme = get_theme_updata(L);
184 int aspect_w = luaL_checknumber(L, 1);
185 int aspect_h = luaL_checknumber(L, 2);
187 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h, theme->get_resource_pool());
190 int EffectChain_gc(lua_State* L)
192 assert(lua_gettop(L) == 1);
193 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
194 chain->~EffectChain();
198 int EffectChain_add_live_input(lua_State* L)
200 assert(lua_gettop(L) == 3);
201 Theme *theme = get_theme_updata(L);
202 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
203 bool override_bounce = checkbool(L, 2);
204 bool deinterlace = checkbool(L, 3);
205 return wrap_lua_object<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain, override_bounce, deinterlace);
208 int EffectChain_add_effect(lua_State* L)
210 assert(lua_gettop(L) >= 2);
211 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
213 // TODO: Better error reporting.
214 Effect *effect = get_effect(L, 2);
215 if (lua_gettop(L) == 2) {
216 if (effect->num_inputs() == 0) {
217 chain->add_input((Input *)effect);
219 chain->add_effect(effect);
222 vector<Effect *> inputs;
223 for (int idx = 3; idx <= lua_gettop(L); ++idx) {
224 if (luaL_testudata(L, idx, "LiveInputWrapper")) {
225 LiveInputWrapper *input = (LiveInputWrapper *)lua_touserdata(L, idx);
226 inputs.push_back(input->get_effect());
228 inputs.push_back(get_effect(L, idx));
231 chain->add_effect(effect, inputs);
234 lua_settop(L, 2); // Return the effect itself.
236 // Make sure Lua doesn't garbage-collect it away.
237 lua_pushvalue(L, -1);
238 luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak?
243 int EffectChain_finalize(lua_State* L)
245 assert(lua_gettop(L) == 2);
246 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
247 bool is_main_chain = checkbool(L, 2);
249 // Add outputs as needed.
250 // NOTE: If you change any details about the output format, you will need to
251 // also update what's given to the muxer (HTTPD::Mux constructor) and
252 // what's put in the H.264 stream (sps_rbsp()).
253 ImageFormat inout_format;
254 inout_format.color_space = COLORSPACE_REC_709;
256 // Output gamma is tricky. We should output Rec. 709 for TV, except that
257 // we expect to run with web players and others that don't really care and
258 // just output with no conversion. So that means we'll need to output sRGB,
259 // even though H.264 has no setting for that (we use “unspecified”).
260 inout_format.gamma_curve = GAMMA_sRGB;
263 YCbCrFormat output_ycbcr_format;
264 // We actually output 4:2:0 and/or 4:2:2 in the end, but chroma subsampling
265 // happens in a pass not run by Movit (see ChromaSubsampler::subsample_chroma()).
266 output_ycbcr_format.chroma_subsampling_x = 1;
267 output_ycbcr_format.chroma_subsampling_y = 1;
268 if (global_flags.ycbcr_rec709_coefficients) {
269 output_ycbcr_format.luma_coefficients = YCBCR_REC_709;
271 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
273 output_ycbcr_format.full_range = false;
274 output_ycbcr_format.num_levels = 256;
276 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR);
277 chain->set_dither_bits(8);
278 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
280 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
286 int LiveInputWrapper_connect_signal(lua_State* L)
288 assert(lua_gettop(L) == 2);
289 LiveInputWrapper *input = (LiveInputWrapper *)luaL_checkudata(L, 1, "LiveInputWrapper");
290 int signal_num = luaL_checknumber(L, 2);
291 input->connect_signal(signal_num);
295 int ImageInput_new(lua_State* L)
297 assert(lua_gettop(L) == 1);
298 string filename = checkstdstring(L, 1);
299 return wrap_lua_object_nonowned<ImageInput>(L, "ImageInput", filename);
302 int WhiteBalanceEffect_new(lua_State* L)
304 assert(lua_gettop(L) == 0);
305 return wrap_lua_object_nonowned<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
308 int ResampleEffect_new(lua_State* L)
310 assert(lua_gettop(L) == 0);
311 return wrap_lua_object_nonowned<ResampleEffect>(L, "ResampleEffect");
314 int PaddingEffect_new(lua_State* L)
316 assert(lua_gettop(L) == 0);
317 return wrap_lua_object_nonowned<PaddingEffect>(L, "PaddingEffect");
320 int IntegralPaddingEffect_new(lua_State* L)
322 assert(lua_gettop(L) == 0);
323 return wrap_lua_object_nonowned<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
326 int OverlayEffect_new(lua_State* L)
328 assert(lua_gettop(L) == 0);
329 return wrap_lua_object_nonowned<OverlayEffect>(L, "OverlayEffect");
332 int ResizeEffect_new(lua_State* L)
334 assert(lua_gettop(L) == 0);
335 return wrap_lua_object_nonowned<ResizeEffect>(L, "ResizeEffect");
338 int MultiplyEffect_new(lua_State* L)
340 assert(lua_gettop(L) == 0);
341 return wrap_lua_object_nonowned<MultiplyEffect>(L, "MultiplyEffect");
344 int MixEffect_new(lua_State* L)
346 assert(lua_gettop(L) == 0);
347 return wrap_lua_object_nonowned<MixEffect>(L, "MixEffect");
350 int InputStateInfo_get_width(lua_State* L)
352 assert(lua_gettop(L) == 2);
353 InputStateInfo *input_state_info = get_input_state_info(L, 1);
354 Theme *theme = get_theme_updata(L);
355 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
356 lua_pushnumber(L, input_state_info->last_width[signal_num]);
360 int InputStateInfo_get_height(lua_State* L)
362 assert(lua_gettop(L) == 2);
363 InputStateInfo *input_state_info = get_input_state_info(L, 1);
364 Theme *theme = get_theme_updata(L);
365 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
366 lua_pushnumber(L, input_state_info->last_height[signal_num]);
370 int InputStateInfo_get_interlaced(lua_State* L)
372 assert(lua_gettop(L) == 2);
373 InputStateInfo *input_state_info = get_input_state_info(L, 1);
374 Theme *theme = get_theme_updata(L);
375 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
376 lua_pushboolean(L, input_state_info->last_interlaced[signal_num]);
380 int InputStateInfo_get_has_signal(lua_State* L)
382 assert(lua_gettop(L) == 2);
383 InputStateInfo *input_state_info = get_input_state_info(L, 1);
384 Theme *theme = get_theme_updata(L);
385 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
386 lua_pushboolean(L, input_state_info->last_has_signal[signal_num]);
390 int InputStateInfo_get_is_connected(lua_State* L)
392 assert(lua_gettop(L) == 2);
393 InputStateInfo *input_state_info = get_input_state_info(L, 1);
394 Theme *theme = get_theme_updata(L);
395 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
396 lua_pushboolean(L, input_state_info->last_is_connected[signal_num]);
400 int InputStateInfo_get_frame_rate_nom(lua_State* L)
402 assert(lua_gettop(L) == 2);
403 InputStateInfo *input_state_info = get_input_state_info(L, 1);
404 Theme *theme = get_theme_updata(L);
405 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
406 lua_pushnumber(L, input_state_info->last_frame_rate_nom[signal_num]);
410 int InputStateInfo_get_frame_rate_den(lua_State* L)
412 assert(lua_gettop(L) == 2);
413 InputStateInfo *input_state_info = get_input_state_info(L, 1);
414 Theme *theme = get_theme_updata(L);
415 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
416 lua_pushnumber(L, input_state_info->last_frame_rate_den[signal_num]);
420 int Effect_set_float(lua_State *L)
422 assert(lua_gettop(L) == 3);
423 Effect *effect = (Effect *)get_effect(L, 1);
424 string key = checkstdstring(L, 2);
425 float value = luaL_checknumber(L, 3);
426 if (!effect->set_float(key, value)) {
427 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
432 int Effect_set_int(lua_State *L)
434 assert(lua_gettop(L) == 3);
435 Effect *effect = (Effect *)get_effect(L, 1);
436 string key = checkstdstring(L, 2);
437 float value = luaL_checknumber(L, 3);
438 if (!effect->set_int(key, value)) {
439 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
444 int Effect_set_vec3(lua_State *L)
446 assert(lua_gettop(L) == 5);
447 Effect *effect = (Effect *)get_effect(L, 1);
448 string key = checkstdstring(L, 2);
450 v[0] = luaL_checknumber(L, 3);
451 v[1] = luaL_checknumber(L, 4);
452 v[2] = luaL_checknumber(L, 5);
453 if (!effect->set_vec3(key, v)) {
454 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", key.c_str(),
460 int Effect_set_vec4(lua_State *L)
462 assert(lua_gettop(L) == 6);
463 Effect *effect = (Effect *)get_effect(L, 1);
464 string key = checkstdstring(L, 2);
466 v[0] = luaL_checknumber(L, 3);
467 v[1] = luaL_checknumber(L, 4);
468 v[2] = luaL_checknumber(L, 5);
469 v[3] = luaL_checknumber(L, 6);
470 if (!effect->set_vec4(key, v)) {
471 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", key.c_str(),
472 v[0], v[1], v[2], v[3]);
477 const luaL_Reg EffectChain_funcs[] = {
478 { "new", EffectChain_new },
479 { "__gc", EffectChain_gc },
480 { "add_live_input", EffectChain_add_live_input },
481 { "add_effect", EffectChain_add_effect },
482 { "finalize", EffectChain_finalize },
486 const luaL_Reg LiveInputWrapper_funcs[] = {
487 { "connect_signal", LiveInputWrapper_connect_signal },
491 const luaL_Reg ImageInput_funcs[] = {
492 { "new", ImageInput_new },
493 { "set_float", Effect_set_float },
494 { "set_int", Effect_set_int },
495 { "set_vec3", Effect_set_vec3 },
496 { "set_vec4", Effect_set_vec4 },
500 const luaL_Reg WhiteBalanceEffect_funcs[] = {
501 { "new", WhiteBalanceEffect_new },
502 { "set_float", Effect_set_float },
503 { "set_int", Effect_set_int },
504 { "set_vec3", Effect_set_vec3 },
505 { "set_vec4", Effect_set_vec4 },
509 const luaL_Reg ResampleEffect_funcs[] = {
510 { "new", ResampleEffect_new },
511 { "set_float", Effect_set_float },
512 { "set_int", Effect_set_int },
513 { "set_vec3", Effect_set_vec3 },
514 { "set_vec4", Effect_set_vec4 },
518 const luaL_Reg PaddingEffect_funcs[] = {
519 { "new", PaddingEffect_new },
520 { "set_float", Effect_set_float },
521 { "set_int", Effect_set_int },
522 { "set_vec3", Effect_set_vec3 },
523 { "set_vec4", Effect_set_vec4 },
527 const luaL_Reg IntegralPaddingEffect_funcs[] = {
528 { "new", IntegralPaddingEffect_new },
529 { "set_float", Effect_set_float },
530 { "set_int", Effect_set_int },
531 { "set_vec3", Effect_set_vec3 },
532 { "set_vec4", Effect_set_vec4 },
536 const luaL_Reg OverlayEffect_funcs[] = {
537 { "new", OverlayEffect_new },
538 { "set_float", Effect_set_float },
539 { "set_int", Effect_set_int },
540 { "set_vec3", Effect_set_vec3 },
541 { "set_vec4", Effect_set_vec4 },
545 const luaL_Reg ResizeEffect_funcs[] = {
546 { "new", ResizeEffect_new },
547 { "set_float", Effect_set_float },
548 { "set_int", Effect_set_int },
549 { "set_vec3", Effect_set_vec3 },
550 { "set_vec4", Effect_set_vec4 },
554 const luaL_Reg MultiplyEffect_funcs[] = {
555 { "new", MultiplyEffect_new },
556 { "set_float", Effect_set_float },
557 { "set_int", Effect_set_int },
558 { "set_vec3", Effect_set_vec3 },
559 { "set_vec4", Effect_set_vec4 },
563 const luaL_Reg MixEffect_funcs[] = {
564 { "new", MixEffect_new },
565 { "set_float", Effect_set_float },
566 { "set_int", Effect_set_int },
567 { "set_vec3", Effect_set_vec3 },
568 { "set_vec4", Effect_set_vec4 },
572 const luaL_Reg InputStateInfo_funcs[] = {
573 { "get_width", InputStateInfo_get_width },
574 { "get_height", InputStateInfo_get_height },
575 { "get_interlaced", InputStateInfo_get_interlaced },
576 { "get_has_signal", InputStateInfo_get_has_signal },
577 { "get_is_connected", InputStateInfo_get_is_connected },
578 { "get_frame_rate_nom", InputStateInfo_get_frame_rate_nom },
579 { "get_frame_rate_den", InputStateInfo_get_frame_rate_den },
585 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain, bool override_bounce, bool deinterlace)
587 deinterlace(deinterlace)
589 ImageFormat inout_format;
590 inout_format.color_space = COLORSPACE_sRGB;
592 // Gamma curve depends on the input signal, and we don't really get any
593 // indications. A camera would be expected to do Rec. 709, but
594 // I haven't checked if any do in practice. However, computers _do_ output
595 // in sRGB gamma (ie., they don't convert from sRGB to Rec. 709), and
596 // I wouldn't really be surprised if most non-professional cameras do, too.
597 // So we pick sRGB as the least evil here.
598 inout_format.gamma_curve = GAMMA_sRGB;
600 // The Blackmagic driver docs claim that the device outputs Y'CbCr
601 // according to Rec. 601, but practical testing indicates it definitely
602 // is Rec. 709 (at least up to errors attributable to rounding errors).
603 // Perhaps 601 was only to indicate the subsampling positions, not the
604 // colorspace itself? Tested with a Lenovo X1 gen 3 as input.
605 YCbCrFormat input_ycbcr_format;
606 input_ycbcr_format.chroma_subsampling_x = global_flags.ten_bit_input ? 1 : 2;
607 input_ycbcr_format.chroma_subsampling_y = 1;
608 input_ycbcr_format.num_levels = global_flags.ten_bit_input ? 1024 : 256;
609 input_ycbcr_format.cb_x_position = 0.0;
610 input_ycbcr_format.cr_x_position = 0.0;
611 input_ycbcr_format.cb_y_position = 0.5;
612 input_ycbcr_format.cr_y_position = 0.5;
613 input_ycbcr_format.luma_coefficients = YCBCR_REC_709;
614 input_ycbcr_format.full_range = false;
618 deinterlace_effect = new movit::DeinterlaceEffect();
620 // As per the comments in deinterlace_effect.h, we turn this off.
621 // The most likely interlaced input for us is either a camera
622 // (where it's fine to turn it off) or a laptop (where it _should_
624 CHECK(deinterlace_effect->set_int("enable_spatial_interlacing_check", 0));
626 num_inputs = deinterlace_effect->num_inputs();
627 assert(num_inputs == FRAME_HISTORY_LENGTH);
631 for (unsigned i = 0; i < num_inputs; ++i) {
632 // When using 10-bit input, we're converting to interleaved through v210Converter.
633 YCbCrInputSplitting splitting = global_flags.ten_bit_input ? YCBCR_INPUT_INTERLEAVED : YCBCR_INPUT_SPLIT_Y_AND_CBCR;
634 if (override_bounce) {
635 inputs.push_back(new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
637 inputs.push_back(new YCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
639 chain->add_input(inputs.back());
643 vector<Effect *> reverse_inputs(inputs.rbegin(), inputs.rend());
644 chain->add_effect(deinterlace_effect, reverse_inputs);
648 void LiveInputWrapper::connect_signal(int signal_num)
650 if (global_mixer == nullptr) {
655 signal_num = theme->map_signal(signal_num);
657 BufferedFrame first_frame = theme->input_state->buffered_frames[signal_num][0];
658 if (first_frame.frame == nullptr) {
662 unsigned width, height;
664 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)first_frame.frame->userdata;
665 width = userdata->last_width[first_frame.field_number];
666 height = userdata->last_height[first_frame.field_number];
669 BufferedFrame last_good_frame = first_frame;
670 for (unsigned i = 0; i < inputs.size(); ++i) {
671 BufferedFrame frame = theme->input_state->buffered_frames[signal_num][i];
672 if (frame.frame == nullptr) {
673 // Not enough data; reuse last frame (well, field).
674 // This is suboptimal, but we have nothing better.
675 frame = last_good_frame;
677 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
679 if (userdata->last_width[frame.field_number] != width ||
680 userdata->last_height[frame.field_number] != height) {
681 // Resolution changed; reuse last frame/field.
682 frame = last_good_frame;
683 userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
686 if (global_flags.ten_bit_input) {
687 inputs[i]->set_texture_num(0, userdata->tex_444[frame.field_number]);
689 inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
690 inputs[i]->set_texture_num(1, userdata->tex_cbcr[frame.field_number]);
692 inputs[i]->set_width(userdata->last_width[frame.field_number]);
693 inputs[i]->set_height(userdata->last_height[frame.field_number]);
695 last_good_frame = frame;
699 BufferedFrame frame = theme->input_state->buffered_frames[signal_num][0];
700 CHECK(deinterlace_effect->set_int("current_field_position", frame.field_number));
706 int call_num_channels(lua_State *L)
708 lua_getglobal(L, "num_channels");
710 if (lua_pcall(L, 0, 1, 0) != 0) {
711 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
715 int num_channels = luaL_checknumber(L, 1);
717 assert(lua_gettop(L) == 0);
723 Theme::Theme(const string &filename, const vector<string> &search_dirs, ResourcePool *resource_pool, unsigned num_cards)
724 : resource_pool(resource_pool), num_cards(num_cards), signal_to_card_mapping(global_flags.default_stream_mapping)
729 register_class("EffectChain", EffectChain_funcs);
730 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
731 register_class("ImageInput", ImageInput_funcs);
732 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
733 register_class("ResampleEffect", ResampleEffect_funcs);
734 register_class("PaddingEffect", PaddingEffect_funcs);
735 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
736 register_class("OverlayEffect", OverlayEffect_funcs);
737 register_class("ResizeEffect", ResizeEffect_funcs);
738 register_class("MultiplyEffect", MultiplyEffect_funcs);
739 register_class("MixEffect", MixEffect_funcs);
740 register_class("InputStateInfo", InputStateInfo_funcs);
742 // Run script. Search through all directories until we find a file that will load
743 // (as in, does not return LUA_ERRFILE); then run it. We store load errors
744 // from all the attempts, and show them once we know we can't find any of them.
746 vector<string> errors;
747 bool success = false;
748 for (size_t i = 0; i < search_dirs.size(); ++i) {
749 string path = search_dirs[i] + "/" + filename;
750 int err = luaL_loadfile(L, path.c_str());
752 // Success; actually call the code.
753 if (lua_pcall(L, 0, LUA_MULTRET, 0)) {
754 fprintf(stderr, "Error when running %s: %s\n", path.c_str(), lua_tostring(L, -1));
760 errors.push_back(lua_tostring(L, -1));
762 if (err != LUA_ERRFILE) {
763 // The file actually loaded, but failed to parse somehow. Abort; don't try the next one.
769 for (const string &error : errors) {
770 fprintf(stderr, "%s\n", error.c_str());
774 assert(lua_gettop(L) == 0);
776 // Ask it for the number of channels.
777 num_channels = call_num_channels(L);
785 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
787 assert(lua_gettop(L) == 0);
788 luaL_newmetatable(L, class_name); // mt = {}
789 lua_pushlightuserdata(L, this);
790 luaL_setfuncs(L, funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
791 lua_pushvalue(L, -1);
792 lua_setfield(L, -2, "__index"); // mt.__index = mt
793 lua_setglobal(L, class_name); // ClassName = mt
794 assert(lua_gettop(L) == 0);
797 Theme::Chain Theme::get_chain(unsigned num, float t, unsigned width, unsigned height, InputState input_state)
801 unique_lock<mutex> lock(m);
802 assert(lua_gettop(L) == 0);
803 lua_getglobal(L, "get_chain"); /* function to be called */
804 lua_pushnumber(L, num);
805 lua_pushnumber(L, t);
806 lua_pushnumber(L, width);
807 lua_pushnumber(L, height);
808 wrap_lua_object<InputStateInfo>(L, "InputStateInfo", input_state);
810 if (lua_pcall(L, 5, 2, 0) != 0) {
811 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
815 chain.chain = (EffectChain *)luaL_testudata(L, -2, "EffectChain");
816 if (chain.chain == nullptr) {
817 fprintf(stderr, "get_chain() for chain number %d did not return an EffectChain\n",
821 if (!lua_isfunction(L, -1)) {
822 fprintf(stderr, "Argument #-1 should be a function\n");
825 lua_pushvalue(L, -1);
826 shared_ptr<LuaRefWithDeleter> funcref(new LuaRefWithDeleter(&m, L, luaL_ref(L, LUA_REGISTRYINDEX)));
828 assert(lua_gettop(L) == 0);
830 chain.setup_chain = [this, funcref, input_state]{
831 unique_lock<mutex> lock(m);
833 this->input_state = &input_state;
835 // Set up state, including connecting signals.
836 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref->get());
837 if (lua_pcall(L, 0, 0, 0) != 0) {
838 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
841 assert(lua_gettop(L) == 0);
844 // TODO: Can we do better, e.g. by running setup_chain() and seeing what it references?
845 // Actually, setup_chain does maybe hold all the references we need now anyway?
846 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
847 for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
848 chain.input_frames.push_back(input_state.buffered_frames[card_index][frame_num].frame);
855 string Theme::get_channel_name(unsigned channel)
857 unique_lock<mutex> lock(m);
858 lua_getglobal(L, "channel_name");
859 lua_pushnumber(L, channel);
860 if (lua_pcall(L, 1, 1, 0) != 0) {
861 fprintf(stderr, "error running function `channel_name': %s\n", lua_tostring(L, -1));
864 const char *ret = lua_tostring(L, -1);
865 if (ret == nullptr) {
866 fprintf(stderr, "function `channel_name' returned nil for channel %d\n", channel);
872 assert(lua_gettop(L) == 0);
876 int Theme::get_channel_signal(unsigned channel)
878 unique_lock<mutex> lock(m);
879 lua_getglobal(L, "channel_signal");
880 lua_pushnumber(L, channel);
881 if (lua_pcall(L, 1, 1, 0) != 0) {
882 fprintf(stderr, "error running function `channel_signal': %s\n", lua_tostring(L, -1));
886 int ret = luaL_checknumber(L, 1);
888 assert(lua_gettop(L) == 0);
892 std::string Theme::get_channel_color(unsigned channel)
894 unique_lock<mutex> lock(m);
895 lua_getglobal(L, "channel_color");
896 lua_pushnumber(L, channel);
897 if (lua_pcall(L, 1, 1, 0) != 0) {
898 fprintf(stderr, "error running function `channel_color': %s\n", lua_tostring(L, -1));
902 const char *ret = lua_tostring(L, -1);
903 if (ret == nullptr) {
904 fprintf(stderr, "function `channel_color' returned nil for channel %d\n", channel);
910 assert(lua_gettop(L) == 0);
914 bool Theme::get_supports_set_wb(unsigned channel)
916 unique_lock<mutex> lock(m);
917 lua_getglobal(L, "supports_set_wb");
918 lua_pushnumber(L, channel);
919 if (lua_pcall(L, 1, 1, 0) != 0) {
920 fprintf(stderr, "error running function `supports_set_wb': %s\n", lua_tostring(L, -1));
924 bool ret = checkbool(L, -1);
926 assert(lua_gettop(L) == 0);
930 void Theme::set_wb(unsigned channel, double r, double g, double b)
932 unique_lock<mutex> lock(m);
933 lua_getglobal(L, "set_wb");
934 lua_pushnumber(L, channel);
935 lua_pushnumber(L, r);
936 lua_pushnumber(L, g);
937 lua_pushnumber(L, b);
938 if (lua_pcall(L, 4, 0, 0) != 0) {
939 fprintf(stderr, "error running function `set_wb': %s\n", lua_tostring(L, -1));
943 assert(lua_gettop(L) == 0);
946 vector<string> Theme::get_transition_names(float t)
948 unique_lock<mutex> lock(m);
949 lua_getglobal(L, "get_transitions");
950 lua_pushnumber(L, t);
951 if (lua_pcall(L, 1, 1, 0) != 0) {
952 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
958 while (lua_next(L, -2) != 0) {
959 ret.push_back(lua_tostring(L, -1));
963 assert(lua_gettop(L) == 0);
967 int Theme::map_signal(int signal_num)
969 unique_lock<mutex> lock(map_m);
970 if (signal_to_card_mapping.count(signal_num)) {
971 return signal_to_card_mapping[signal_num];
975 if (global_flags.output_card != -1 && num_cards > 1) {
976 // Try to exclude the output card from the default card_index.
977 card_index = signal_num % (num_cards - 1);
978 if (card_index >= global_flags.output_card) {
981 if (signal_num >= int(num_cards - 1)) {
982 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u input card(s) (card %d is busy with output).\n",
983 signal_num, num_cards - 1, global_flags.output_card);
984 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
987 card_index = signal_num % num_cards;
988 if (signal_num >= int(num_cards)) {
989 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u card(s).\n", signal_num, num_cards);
990 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
993 signal_to_card_mapping[signal_num] = card_index;
997 void Theme::set_signal_mapping(int signal_num, int card_num)
999 unique_lock<mutex> lock(map_m);
1000 assert(card_num < int(num_cards));
1001 signal_to_card_mapping[signal_num] = card_num;
1004 void Theme::transition_clicked(int transition_num, float t)
1006 unique_lock<mutex> lock(m);
1007 lua_getglobal(L, "transition_clicked");
1008 lua_pushnumber(L, transition_num);
1009 lua_pushnumber(L, t);
1011 if (lua_pcall(L, 2, 0, 0) != 0) {
1012 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
1015 assert(lua_gettop(L) == 0);
1018 void Theme::channel_clicked(int preview_num)
1020 unique_lock<mutex> lock(m);
1021 lua_getglobal(L, "channel_clicked");
1022 lua_pushnumber(L, preview_num);
1024 if (lua_pcall(L, 1, 0, 0) != 0) {
1025 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
1028 assert(lua_gettop(L) == 0);