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"
30 #include "ffmpeg_capture.h"
32 #include "image_input.h"
34 #include "input_state.h"
35 #include "pbo_frame_allocator.h"
44 using namespace movit;
46 extern Mixer *global_mixer;
50 // Contains basically the same data as InputState, but does not hold on to
51 // a reference to the frames. This is important so that we can release them
52 // without having to wait for Lua's GC.
53 struct InputStateInfo {
54 InputStateInfo(const InputState& input_state);
56 unsigned last_width[MAX_VIDEO_CARDS], last_height[MAX_VIDEO_CARDS];
57 bool last_interlaced[MAX_VIDEO_CARDS], last_has_signal[MAX_VIDEO_CARDS], last_is_connected[MAX_VIDEO_CARDS];
58 unsigned last_frame_rate_nom[MAX_VIDEO_CARDS], last_frame_rate_den[MAX_VIDEO_CARDS];
61 InputStateInfo::InputStateInfo(const InputState &input_state)
63 for (unsigned signal_num = 0; signal_num < MAX_VIDEO_CARDS; ++signal_num) {
64 BufferedFrame frame = input_state.buffered_frames[signal_num][0];
65 if (frame.frame == nullptr) {
66 last_width[signal_num] = last_height[signal_num] = 0;
67 last_interlaced[signal_num] = false;
68 last_has_signal[signal_num] = false;
69 last_is_connected[signal_num] = false;
72 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
73 last_width[signal_num] = userdata->last_width[frame.field_number];
74 last_height[signal_num] = userdata->last_height[frame.field_number];
75 last_interlaced[signal_num] = userdata->last_interlaced;
76 last_has_signal[signal_num] = userdata->last_has_signal;
77 last_is_connected[signal_num] = userdata->last_is_connected;
78 last_frame_rate_nom[signal_num] = userdata->last_frame_rate_nom;
79 last_frame_rate_den[signal_num] = userdata->last_frame_rate_den;
83 class LuaRefWithDeleter {
85 LuaRefWithDeleter(mutex *m, lua_State *L, int ref) : m(m), L(L), ref(ref) {}
86 ~LuaRefWithDeleter() {
87 unique_lock<mutex> lock(*m);
88 luaL_unref(L, LUA_REGISTRYINDEX, ref);
90 int get() const { return ref; }
93 LuaRefWithDeleter(const LuaRefWithDeleter &) = delete;
100 template<class T, class... Args>
101 int wrap_lua_object(lua_State* L, const char *class_name, Args&&... args)
103 // Construct the C++ object and put it on the stack.
104 void *mem = lua_newuserdata(L, sizeof(T));
105 new(mem) T(forward<Args>(args)...);
107 // Look up the metatable named <class_name>, and set it on the new object.
108 luaL_getmetatable(L, class_name);
109 lua_setmetatable(L, -2);
114 // Like wrap_lua_object, but the object is not owned by Lua; ie. it's not freed
115 // by Lua GC. This is typically the case for Effects, which are owned by EffectChain
116 // and expected to be destructed by it. The object will be of type T** instead of T*
117 // when exposed to Lua.
119 // Note that we currently leak if you allocate an Effect in this way and never call
120 // add_effect. We should see if there's a way to e.g. set __gc on it at construction time
121 // and then release that once add_effect() takes ownership.
122 template<class T, class... Args>
123 int wrap_lua_object_nonowned(lua_State* L, const char *class_name, Args&&... args)
125 // Construct the pointer ot the C++ object and put it on the stack.
126 T **obj = (T **)lua_newuserdata(L, sizeof(T *));
127 *obj = new T(forward<Args>(args)...);
129 // Look up the metatable named <class_name>, and set it on the new object.
130 luaL_getmetatable(L, class_name);
131 lua_setmetatable(L, -2);
136 Theme *get_theme_updata(lua_State* L)
138 luaL_checktype(L, lua_upvalueindex(1), LUA_TLIGHTUSERDATA);
139 return (Theme *)lua_touserdata(L, lua_upvalueindex(1));
142 Effect *get_effect(lua_State *L, int idx)
144 if (luaL_testudata(L, idx, "WhiteBalanceEffect") ||
145 luaL_testudata(L, idx, "ResampleEffect") ||
146 luaL_testudata(L, idx, "PaddingEffect") ||
147 luaL_testudata(L, idx, "IntegralPaddingEffect") ||
148 luaL_testudata(L, idx, "OverlayEffect") ||
149 luaL_testudata(L, idx, "ResizeEffect") ||
150 luaL_testudata(L, idx, "MultiplyEffect") ||
151 luaL_testudata(L, idx, "MixEffect") ||
152 luaL_testudata(L, idx, "ImageInput")) {
153 return *(Effect **)lua_touserdata(L, idx);
155 luaL_error(L, "Error: Index #%d was not an Effect type\n", idx);
159 InputStateInfo *get_input_state_info(lua_State *L, int idx)
161 if (luaL_testudata(L, idx, "InputStateInfo")) {
162 return (InputStateInfo *)lua_touserdata(L, idx);
164 luaL_error(L, "Error: Index #%d was not InputStateInfo\n", idx);
168 bool checkbool(lua_State* L, int idx)
170 luaL_checktype(L, idx, LUA_TBOOLEAN);
171 return lua_toboolean(L, idx);
174 string checkstdstring(lua_State *L, int index)
177 const char* cstr = lua_tolstring(L, index, &len);
178 return string(cstr, len);
181 int EffectChain_new(lua_State* L)
183 assert(lua_gettop(L) == 2);
184 Theme *theme = get_theme_updata(L);
185 int aspect_w = luaL_checknumber(L, 1);
186 int aspect_h = luaL_checknumber(L, 2);
188 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h, theme->get_resource_pool());
191 int EffectChain_gc(lua_State* L)
193 assert(lua_gettop(L) == 1);
194 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
195 chain->~EffectChain();
199 int EffectChain_add_live_input(lua_State* L)
201 assert(lua_gettop(L) == 3);
202 Theme *theme = get_theme_updata(L);
203 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
204 bool override_bounce = checkbool(L, 2);
205 bool deinterlace = checkbool(L, 3);
206 bmusb::PixelFormat pixel_format = global_flags.ten_bit_input ? bmusb::PixelFormat_10BitYCbCr : bmusb::PixelFormat_8BitYCbCr;
208 // Needs to be nonowned to match add_video_input (see below).
209 return wrap_lua_object_nonowned<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain, pixel_format, override_bounce, deinterlace);
212 int EffectChain_add_video_input(lua_State* L)
214 assert(lua_gettop(L) == 3);
215 Theme *theme = get_theme_updata(L);
216 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
217 FFmpegCapture **capture = (FFmpegCapture **)luaL_checkudata(L, 2, "VideoInput");
218 bool deinterlace = checkbool(L, 3);
220 // These need to be nonowned, so that the LiveInputWrapper still exists
221 // and can feed frames to the right EffectChain even if the Lua code
222 // doesn't care about the object anymore. (If we change this, we'd need
223 // to also unregister the signal connection on __gc.)
224 int ret = wrap_lua_object_nonowned<LiveInputWrapper>(
225 L, "LiveInputWrapper", theme, chain, bmusb::PixelFormat_8BitRGBA,
226 /*override_bounce=*/false, deinterlace);
228 Theme *theme = get_theme_updata(L);
229 LiveInputWrapper **live_input = (LiveInputWrapper **)lua_touserdata(L, -1);
230 theme->register_signal_connection(*live_input, *capture);
235 int EffectChain_add_effect(lua_State* L)
237 assert(lua_gettop(L) >= 2);
238 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
240 // TODO: Better error reporting.
241 Effect *effect = get_effect(L, 2);
242 if (lua_gettop(L) == 2) {
243 if (effect->num_inputs() == 0) {
244 chain->add_input((Input *)effect);
246 chain->add_effect(effect);
249 vector<Effect *> inputs;
250 for (int idx = 3; idx <= lua_gettop(L); ++idx) {
251 if (luaL_testudata(L, idx, "LiveInputWrapper")) {
252 LiveInputWrapper **input = (LiveInputWrapper **)lua_touserdata(L, idx);
253 inputs.push_back((*input)->get_effect());
255 inputs.push_back(get_effect(L, idx));
258 chain->add_effect(effect, inputs);
261 lua_settop(L, 2); // Return the effect itself.
263 // Make sure Lua doesn't garbage-collect it away.
264 lua_pushvalue(L, -1);
265 luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak?
270 int EffectChain_finalize(lua_State* L)
272 assert(lua_gettop(L) == 2);
273 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
274 bool is_main_chain = checkbool(L, 2);
276 // Add outputs as needed.
277 // NOTE: If you change any details about the output format, you will need to
278 // also update what's given to the muxer (HTTPD::Mux constructor) and
279 // what's put in the H.264 stream (sps_rbsp()).
280 ImageFormat inout_format;
281 inout_format.color_space = COLORSPACE_REC_709;
283 // Output gamma is tricky. We should output Rec. 709 for TV, except that
284 // we expect to run with web players and others that don't really care and
285 // just output with no conversion. So that means we'll need to output sRGB,
286 // even though H.264 has no setting for that (we use “unspecified”).
287 inout_format.gamma_curve = GAMMA_sRGB;
290 YCbCrFormat output_ycbcr_format;
291 // We actually output 4:2:0 and/or 4:2:2 in the end, but chroma subsampling
292 // happens in a pass not run by Movit (see ChromaSubsampler::subsample_chroma()).
293 output_ycbcr_format.chroma_subsampling_x = 1;
294 output_ycbcr_format.chroma_subsampling_y = 1;
296 // This will be overridden if HDMI/SDI output is in force.
297 if (global_flags.ycbcr_rec709_coefficients) {
298 output_ycbcr_format.luma_coefficients = YCBCR_REC_709;
300 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
303 output_ycbcr_format.full_range = false;
304 output_ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
306 GLenum type = global_flags.x264_bit_depth > 8 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_BYTE;
308 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR, type);
310 // If we're using zerocopy video encoding (so the destination
311 // Y texture is owned by VA-API and will be unavailable for
312 // display), add a copy, where we'll only be using the Y component.
313 if (global_flags.use_zerocopy) {
314 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.
316 chain->set_dither_bits(global_flags.x264_bit_depth > 8 ? 16 : 8);
317 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
319 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
326 int LiveInputWrapper_connect_signal(lua_State* L)
328 assert(lua_gettop(L) == 2);
329 LiveInputWrapper **input = (LiveInputWrapper **)luaL_checkudata(L, 1, "LiveInputWrapper");
330 int signal_num = luaL_checknumber(L, 2);
331 (*input)->connect_signal(signal_num);
335 int ImageInput_new(lua_State* L)
337 assert(lua_gettop(L) == 1);
338 string filename = checkstdstring(L, 1);
339 return wrap_lua_object_nonowned<ImageInput>(L, "ImageInput", filename);
342 int VideoInput_new(lua_State* L)
344 assert(lua_gettop(L) == 1);
345 string filename = checkstdstring(L, 1);
346 int ret = wrap_lua_object_nonowned<FFmpegCapture>(L, "VideoInput", filename, global_flags.width, global_flags.height);
348 Theme *theme = get_theme_updata(L);
349 FFmpegCapture **capture = (FFmpegCapture **)lua_touserdata(L, -1);
350 theme->register_video_input(*capture);
355 int WhiteBalanceEffect_new(lua_State* L)
357 assert(lua_gettop(L) == 0);
358 return wrap_lua_object_nonowned<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
361 int ResampleEffect_new(lua_State* L)
363 assert(lua_gettop(L) == 0);
364 return wrap_lua_object_nonowned<ResampleEffect>(L, "ResampleEffect");
367 int PaddingEffect_new(lua_State* L)
369 assert(lua_gettop(L) == 0);
370 return wrap_lua_object_nonowned<PaddingEffect>(L, "PaddingEffect");
373 int IntegralPaddingEffect_new(lua_State* L)
375 assert(lua_gettop(L) == 0);
376 return wrap_lua_object_nonowned<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
379 int OverlayEffect_new(lua_State* L)
381 assert(lua_gettop(L) == 0);
382 return wrap_lua_object_nonowned<OverlayEffect>(L, "OverlayEffect");
385 int ResizeEffect_new(lua_State* L)
387 assert(lua_gettop(L) == 0);
388 return wrap_lua_object_nonowned<ResizeEffect>(L, "ResizeEffect");
391 int MultiplyEffect_new(lua_State* L)
393 assert(lua_gettop(L) == 0);
394 return wrap_lua_object_nonowned<MultiplyEffect>(L, "MultiplyEffect");
397 int MixEffect_new(lua_State* L)
399 assert(lua_gettop(L) == 0);
400 return wrap_lua_object_nonowned<MixEffect>(L, "MixEffect");
403 int InputStateInfo_get_width(lua_State* L)
405 assert(lua_gettop(L) == 2);
406 InputStateInfo *input_state_info = get_input_state_info(L, 1);
407 Theme *theme = get_theme_updata(L);
408 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
409 lua_pushnumber(L, input_state_info->last_width[signal_num]);
413 int InputStateInfo_get_height(lua_State* L)
415 assert(lua_gettop(L) == 2);
416 InputStateInfo *input_state_info = get_input_state_info(L, 1);
417 Theme *theme = get_theme_updata(L);
418 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
419 lua_pushnumber(L, input_state_info->last_height[signal_num]);
423 int InputStateInfo_get_interlaced(lua_State* L)
425 assert(lua_gettop(L) == 2);
426 InputStateInfo *input_state_info = get_input_state_info(L, 1);
427 Theme *theme = get_theme_updata(L);
428 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
429 lua_pushboolean(L, input_state_info->last_interlaced[signal_num]);
433 int InputStateInfo_get_has_signal(lua_State* L)
435 assert(lua_gettop(L) == 2);
436 InputStateInfo *input_state_info = get_input_state_info(L, 1);
437 Theme *theme = get_theme_updata(L);
438 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
439 lua_pushboolean(L, input_state_info->last_has_signal[signal_num]);
443 int InputStateInfo_get_is_connected(lua_State* L)
445 assert(lua_gettop(L) == 2);
446 InputStateInfo *input_state_info = get_input_state_info(L, 1);
447 Theme *theme = get_theme_updata(L);
448 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
449 lua_pushboolean(L, input_state_info->last_is_connected[signal_num]);
453 int InputStateInfo_get_frame_rate_nom(lua_State* L)
455 assert(lua_gettop(L) == 2);
456 InputStateInfo *input_state_info = get_input_state_info(L, 1);
457 Theme *theme = get_theme_updata(L);
458 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
459 lua_pushnumber(L, input_state_info->last_frame_rate_nom[signal_num]);
463 int InputStateInfo_get_frame_rate_den(lua_State* L)
465 assert(lua_gettop(L) == 2);
466 InputStateInfo *input_state_info = get_input_state_info(L, 1);
467 Theme *theme = get_theme_updata(L);
468 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
469 lua_pushnumber(L, input_state_info->last_frame_rate_den[signal_num]);
473 int Effect_set_float(lua_State *L)
475 assert(lua_gettop(L) == 3);
476 Effect *effect = (Effect *)get_effect(L, 1);
477 string key = checkstdstring(L, 2);
478 float value = luaL_checknumber(L, 3);
479 if (!effect->set_float(key, value)) {
480 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
485 int Effect_set_int(lua_State *L)
487 assert(lua_gettop(L) == 3);
488 Effect *effect = (Effect *)get_effect(L, 1);
489 string key = checkstdstring(L, 2);
490 float value = luaL_checknumber(L, 3);
491 if (!effect->set_int(key, value)) {
492 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
497 int Effect_set_vec3(lua_State *L)
499 assert(lua_gettop(L) == 5);
500 Effect *effect = (Effect *)get_effect(L, 1);
501 string key = checkstdstring(L, 2);
503 v[0] = luaL_checknumber(L, 3);
504 v[1] = luaL_checknumber(L, 4);
505 v[2] = luaL_checknumber(L, 5);
506 if (!effect->set_vec3(key, v)) {
507 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", key.c_str(),
513 int Effect_set_vec4(lua_State *L)
515 assert(lua_gettop(L) == 6);
516 Effect *effect = (Effect *)get_effect(L, 1);
517 string key = checkstdstring(L, 2);
519 v[0] = luaL_checknumber(L, 3);
520 v[1] = luaL_checknumber(L, 4);
521 v[2] = luaL_checknumber(L, 5);
522 v[3] = luaL_checknumber(L, 6);
523 if (!effect->set_vec4(key, v)) {
524 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", key.c_str(),
525 v[0], v[1], v[2], v[3]);
530 const luaL_Reg EffectChain_funcs[] = {
531 { "new", EffectChain_new },
532 { "__gc", EffectChain_gc },
533 { "add_live_input", EffectChain_add_live_input },
534 { "add_video_input", EffectChain_add_video_input },
535 { "add_effect", EffectChain_add_effect },
536 { "finalize", EffectChain_finalize },
540 const luaL_Reg LiveInputWrapper_funcs[] = {
541 { "connect_signal", LiveInputWrapper_connect_signal },
545 const luaL_Reg ImageInput_funcs[] = {
546 { "new", ImageInput_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 VideoInput_funcs[] = {
555 { "new", VideoInput_new },
559 const luaL_Reg WhiteBalanceEffect_funcs[] = {
560 { "new", WhiteBalanceEffect_new },
561 { "set_float", Effect_set_float },
562 { "set_int", Effect_set_int },
563 { "set_vec3", Effect_set_vec3 },
564 { "set_vec4", Effect_set_vec4 },
568 const luaL_Reg ResampleEffect_funcs[] = {
569 { "new", ResampleEffect_new },
570 { "set_float", Effect_set_float },
571 { "set_int", Effect_set_int },
572 { "set_vec3", Effect_set_vec3 },
573 { "set_vec4", Effect_set_vec4 },
577 const luaL_Reg PaddingEffect_funcs[] = {
578 { "new", PaddingEffect_new },
579 { "set_float", Effect_set_float },
580 { "set_int", Effect_set_int },
581 { "set_vec3", Effect_set_vec3 },
582 { "set_vec4", Effect_set_vec4 },
586 const luaL_Reg IntegralPaddingEffect_funcs[] = {
587 { "new", IntegralPaddingEffect_new },
588 { "set_float", Effect_set_float },
589 { "set_int", Effect_set_int },
590 { "set_vec3", Effect_set_vec3 },
591 { "set_vec4", Effect_set_vec4 },
595 const luaL_Reg OverlayEffect_funcs[] = {
596 { "new", OverlayEffect_new },
597 { "set_float", Effect_set_float },
598 { "set_int", Effect_set_int },
599 { "set_vec3", Effect_set_vec3 },
600 { "set_vec4", Effect_set_vec4 },
604 const luaL_Reg ResizeEffect_funcs[] = {
605 { "new", ResizeEffect_new },
606 { "set_float", Effect_set_float },
607 { "set_int", Effect_set_int },
608 { "set_vec3", Effect_set_vec3 },
609 { "set_vec4", Effect_set_vec4 },
613 const luaL_Reg MultiplyEffect_funcs[] = {
614 { "new", MultiplyEffect_new },
615 { "set_float", Effect_set_float },
616 { "set_int", Effect_set_int },
617 { "set_vec3", Effect_set_vec3 },
618 { "set_vec4", Effect_set_vec4 },
622 const luaL_Reg MixEffect_funcs[] = {
623 { "new", MixEffect_new },
624 { "set_float", Effect_set_float },
625 { "set_int", Effect_set_int },
626 { "set_vec3", Effect_set_vec3 },
627 { "set_vec4", Effect_set_vec4 },
631 const luaL_Reg InputStateInfo_funcs[] = {
632 { "get_width", InputStateInfo_get_width },
633 { "get_height", InputStateInfo_get_height },
634 { "get_interlaced", InputStateInfo_get_interlaced },
635 { "get_has_signal", InputStateInfo_get_has_signal },
636 { "get_is_connected", InputStateInfo_get_is_connected },
637 { "get_frame_rate_nom", InputStateInfo_get_frame_rate_nom },
638 { "get_frame_rate_den", InputStateInfo_get_frame_rate_den },
644 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain, bmusb::PixelFormat pixel_format, bool override_bounce, bool deinterlace)
646 pixel_format(pixel_format),
647 deinterlace(deinterlace)
649 ImageFormat inout_format;
650 inout_format.color_space = COLORSPACE_sRGB;
652 // Gamma curve depends on the input signal, and we don't really get any
653 // indications. A camera would be expected to do Rec. 709, but
654 // I haven't checked if any do in practice. However, computers _do_ output
655 // in sRGB gamma (ie., they don't convert from sRGB to Rec. 709), and
656 // I wouldn't really be surprised if most non-professional cameras do, too.
657 // So we pick sRGB as the least evil here.
658 inout_format.gamma_curve = GAMMA_sRGB;
662 deinterlace_effect = new movit::DeinterlaceEffect();
664 // As per the comments in deinterlace_effect.h, we turn this off.
665 // The most likely interlaced input for us is either a camera
666 // (where it's fine to turn it off) or a laptop (where it _should_
668 CHECK(deinterlace_effect->set_int("enable_spatial_interlacing_check", 0));
670 num_inputs = deinterlace_effect->num_inputs();
671 assert(num_inputs == FRAME_HISTORY_LENGTH);
676 if (pixel_format == bmusb::PixelFormat_8BitRGBA) {
677 for (unsigned i = 0; i < num_inputs; ++i) {
678 if (global_flags.can_disable_srgb_decoder) {
679 rgba_inputs.push_back(new sRGBSwitchingFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
681 rgba_inputs.push_back(new NonsRGBCapableFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
683 chain->add_input(rgba_inputs.back());
687 vector<Effect *> reverse_inputs(rgba_inputs.rbegin(), rgba_inputs.rend());
688 chain->add_effect(deinterlace_effect, reverse_inputs);
691 assert(pixel_format == bmusb::PixelFormat_8BitYCbCr || pixel_format == bmusb::PixelFormat_10BitYCbCr);
692 // The Blackmagic driver docs claim that the device outputs Y'CbCr
693 // according to Rec. 601, but practical testing indicates it definitely
694 // is Rec. 709 (at least up to errors attributable to rounding errors).
695 // Perhaps 601 was only to indicate the subsampling positions, not the
696 // colorspace itself? Tested with a Lenovo X1 gen 3 as input.
697 YCbCrFormat input_ycbcr_format;
698 input_ycbcr_format.chroma_subsampling_x = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1 : 2;
699 input_ycbcr_format.chroma_subsampling_y = 1;
700 input_ycbcr_format.num_levels = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1024 : 256;
701 input_ycbcr_format.cb_x_position = 0.0;
702 input_ycbcr_format.cr_x_position = 0.0;
703 input_ycbcr_format.cb_y_position = 0.5;
704 input_ycbcr_format.cr_y_position = 0.5;
705 input_ycbcr_format.luma_coefficients = YCBCR_REC_709;
706 input_ycbcr_format.full_range = false;
708 for (unsigned i = 0; i < num_inputs; ++i) {
709 // When using 10-bit input, we're converting to interleaved through v210Converter.
710 YCbCrInputSplitting splitting = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? YCBCR_INPUT_INTERLEAVED : YCBCR_INPUT_SPLIT_Y_AND_CBCR;
711 if (override_bounce) {
712 ycbcr_inputs.push_back(new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
714 ycbcr_inputs.push_back(new YCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
716 chain->add_input(ycbcr_inputs.back());
720 vector<Effect *> reverse_inputs(ycbcr_inputs.rbegin(), ycbcr_inputs.rend());
721 chain->add_effect(deinterlace_effect, reverse_inputs);
726 void LiveInputWrapper::connect_signal(int signal_num)
728 if (global_mixer == nullptr) {
733 signal_num = theme->map_signal(signal_num);
734 connect_signal_raw(signal_num);
737 void LiveInputWrapper::connect_signal_raw(int signal_num)
739 BufferedFrame first_frame = theme->input_state->buffered_frames[signal_num][0];
740 if (first_frame.frame == nullptr) {
744 unsigned width, height;
746 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)first_frame.frame->userdata;
747 width = userdata->last_width[first_frame.field_number];
748 height = userdata->last_height[first_frame.field_number];
751 BufferedFrame last_good_frame = first_frame;
752 for (unsigned i = 0; i < max(ycbcr_inputs.size(), rgba_inputs.size()); ++i) {
753 BufferedFrame frame = theme->input_state->buffered_frames[signal_num][i];
754 if (frame.frame == nullptr) {
755 // Not enough data; reuse last frame (well, field).
756 // This is suboptimal, but we have nothing better.
757 frame = last_good_frame;
759 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
761 unsigned this_width = userdata->last_width[frame.field_number];
762 unsigned this_height = userdata->last_height[frame.field_number];
763 if (this_width != width || this_height != height) {
764 // Resolution changed; reuse last frame/field.
765 frame = last_good_frame;
766 userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
769 assert(userdata->pixel_format == pixel_format);
770 switch (pixel_format) {
771 case bmusb::PixelFormat_8BitYCbCr:
772 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
773 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cbcr[frame.field_number]);
774 ycbcr_inputs[i]->set_width(this_width);
775 ycbcr_inputs[i]->set_height(this_height);
777 case bmusb::PixelFormat_10BitYCbCr:
778 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_444[frame.field_number]);
779 ycbcr_inputs[i]->set_width(this_width);
780 ycbcr_inputs[i]->set_height(this_height);
782 case bmusb::PixelFormat_8BitRGBA:
783 rgba_inputs[i]->set_texture_num(userdata->tex_rgba[frame.field_number]);
784 rgba_inputs[i]->set_width(this_width);
785 rgba_inputs[i]->set_height(this_height);
791 last_good_frame = frame;
795 BufferedFrame frame = theme->input_state->buffered_frames[signal_num][0];
796 CHECK(deinterlace_effect->set_int("current_field_position", frame.field_number));
802 int call_num_channels(lua_State *L)
804 lua_getglobal(L, "num_channels");
806 if (lua_pcall(L, 0, 1, 0) != 0) {
807 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
811 int num_channels = luaL_checknumber(L, 1);
813 assert(lua_gettop(L) == 0);
819 Theme::Theme(const string &filename, const vector<string> &search_dirs, ResourcePool *resource_pool, unsigned num_cards)
820 : resource_pool(resource_pool), num_cards(num_cards), signal_to_card_mapping(global_flags.default_stream_mapping)
825 register_class("EffectChain", EffectChain_funcs);
826 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
827 register_class("ImageInput", ImageInput_funcs);
828 register_class("VideoInput", VideoInput_funcs);
829 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
830 register_class("ResampleEffect", ResampleEffect_funcs);
831 register_class("PaddingEffect", PaddingEffect_funcs);
832 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
833 register_class("OverlayEffect", OverlayEffect_funcs);
834 register_class("ResizeEffect", ResizeEffect_funcs);
835 register_class("MultiplyEffect", MultiplyEffect_funcs);
836 register_class("MixEffect", MixEffect_funcs);
837 register_class("InputStateInfo", InputStateInfo_funcs);
839 // Run script. Search through all directories until we find a file that will load
840 // (as in, does not return LUA_ERRFILE); then run it. We store load errors
841 // from all the attempts, and show them once we know we can't find any of them.
843 vector<string> errors;
844 bool success = false;
845 for (size_t i = 0; i < search_dirs.size(); ++i) {
846 string path = search_dirs[i] + "/" + filename;
847 int err = luaL_loadfile(L, path.c_str());
849 // Success; actually call the code.
850 if (lua_pcall(L, 0, LUA_MULTRET, 0)) {
851 fprintf(stderr, "Error when running %s: %s\n", path.c_str(), lua_tostring(L, -1));
857 errors.push_back(lua_tostring(L, -1));
859 if (err != LUA_ERRFILE) {
860 // The file actually loaded, but failed to parse somehow. Abort; don't try the next one.
866 for (const string &error : errors) {
867 fprintf(stderr, "%s\n", error.c_str());
871 assert(lua_gettop(L) == 0);
873 // Ask it for the number of channels.
874 num_channels = call_num_channels(L);
882 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
884 assert(lua_gettop(L) == 0);
885 luaL_newmetatable(L, class_name); // mt = {}
886 lua_pushlightuserdata(L, this);
887 luaL_setfuncs(L, funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
888 lua_pushvalue(L, -1);
889 lua_setfield(L, -2, "__index"); // mt.__index = mt
890 lua_setglobal(L, class_name); // ClassName = mt
891 assert(lua_gettop(L) == 0);
894 Theme::Chain Theme::get_chain(unsigned num, float t, unsigned width, unsigned height, InputState input_state)
898 unique_lock<mutex> lock(m);
899 assert(lua_gettop(L) == 0);
900 lua_getglobal(L, "get_chain"); /* function to be called */
901 lua_pushnumber(L, num);
902 lua_pushnumber(L, t);
903 lua_pushnumber(L, width);
904 lua_pushnumber(L, height);
905 wrap_lua_object<InputStateInfo>(L, "InputStateInfo", input_state);
907 if (lua_pcall(L, 5, 2, 0) != 0) {
908 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
912 chain.chain = (EffectChain *)luaL_testudata(L, -2, "EffectChain");
913 if (chain.chain == nullptr) {
914 fprintf(stderr, "get_chain() for chain number %d did not return an EffectChain\n",
918 if (!lua_isfunction(L, -1)) {
919 fprintf(stderr, "Argument #-1 should be a function\n");
922 lua_pushvalue(L, -1);
923 shared_ptr<LuaRefWithDeleter> funcref(new LuaRefWithDeleter(&m, L, luaL_ref(L, LUA_REGISTRYINDEX)));
925 assert(lua_gettop(L) == 0);
927 chain.setup_chain = [this, funcref, input_state]{
928 unique_lock<mutex> lock(m);
930 this->input_state = &input_state;
932 // Set up state, including connecting signals.
933 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref->get());
934 if (lua_pcall(L, 0, 0, 0) != 0) {
935 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
938 assert(lua_gettop(L) == 0);
941 // TODO: Can we do better, e.g. by running setup_chain() and seeing what it references?
942 // Actually, setup_chain does maybe hold all the references we need now anyway?
943 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
944 for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
945 chain.input_frames.push_back(input_state.buffered_frames[card_index][frame_num].frame);
952 string Theme::get_channel_name(unsigned channel)
954 unique_lock<mutex> lock(m);
955 lua_getglobal(L, "channel_name");
956 lua_pushnumber(L, channel);
957 if (lua_pcall(L, 1, 1, 0) != 0) {
958 fprintf(stderr, "error running function `channel_name': %s\n", lua_tostring(L, -1));
961 const char *ret = lua_tostring(L, -1);
962 if (ret == nullptr) {
963 fprintf(stderr, "function `channel_name' returned nil for channel %d\n", channel);
969 assert(lua_gettop(L) == 0);
973 int Theme::get_channel_signal(unsigned channel)
975 unique_lock<mutex> lock(m);
976 lua_getglobal(L, "channel_signal");
977 lua_pushnumber(L, channel);
978 if (lua_pcall(L, 1, 1, 0) != 0) {
979 fprintf(stderr, "error running function `channel_signal': %s\n", lua_tostring(L, -1));
983 int ret = luaL_checknumber(L, 1);
985 assert(lua_gettop(L) == 0);
989 std::string Theme::get_channel_color(unsigned channel)
991 unique_lock<mutex> lock(m);
992 lua_getglobal(L, "channel_color");
993 lua_pushnumber(L, channel);
994 if (lua_pcall(L, 1, 1, 0) != 0) {
995 fprintf(stderr, "error running function `channel_color': %s\n", lua_tostring(L, -1));
999 const char *ret = lua_tostring(L, -1);
1000 if (ret == nullptr) {
1001 fprintf(stderr, "function `channel_color' returned nil for channel %d\n", channel);
1005 string retstr = ret;
1007 assert(lua_gettop(L) == 0);
1011 bool Theme::get_supports_set_wb(unsigned channel)
1013 unique_lock<mutex> lock(m);
1014 lua_getglobal(L, "supports_set_wb");
1015 lua_pushnumber(L, channel);
1016 if (lua_pcall(L, 1, 1, 0) != 0) {
1017 fprintf(stderr, "error running function `supports_set_wb': %s\n", lua_tostring(L, -1));
1021 bool ret = checkbool(L, -1);
1023 assert(lua_gettop(L) == 0);
1027 void Theme::set_wb(unsigned channel, double r, double g, double b)
1029 unique_lock<mutex> lock(m);
1030 lua_getglobal(L, "set_wb");
1031 lua_pushnumber(L, channel);
1032 lua_pushnumber(L, r);
1033 lua_pushnumber(L, g);
1034 lua_pushnumber(L, b);
1035 if (lua_pcall(L, 4, 0, 0) != 0) {
1036 fprintf(stderr, "error running function `set_wb': %s\n", lua_tostring(L, -1));
1040 assert(lua_gettop(L) == 0);
1043 vector<string> Theme::get_transition_names(float t)
1045 unique_lock<mutex> lock(m);
1046 lua_getglobal(L, "get_transitions");
1047 lua_pushnumber(L, t);
1048 if (lua_pcall(L, 1, 1, 0) != 0) {
1049 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
1055 while (lua_next(L, -2) != 0) {
1056 ret.push_back(lua_tostring(L, -1));
1060 assert(lua_gettop(L) == 0);
1064 int Theme::map_signal(int signal_num)
1066 unique_lock<mutex> lock(map_m);
1067 if (signal_to_card_mapping.count(signal_num)) {
1068 return signal_to_card_mapping[signal_num];
1072 if (global_flags.output_card != -1 && num_cards > 1) {
1073 // Try to exclude the output card from the default card_index.
1074 card_index = signal_num % (num_cards - 1);
1075 if (card_index >= global_flags.output_card) {
1078 if (signal_num >= int(num_cards - 1)) {
1079 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u input card(s) (card %d is busy with output).\n",
1080 signal_num, num_cards - 1, global_flags.output_card);
1081 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1084 card_index = signal_num % num_cards;
1085 if (signal_num >= int(num_cards)) {
1086 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u card(s).\n", signal_num, num_cards);
1087 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1090 signal_to_card_mapping[signal_num] = card_index;
1094 void Theme::set_signal_mapping(int signal_num, int card_num)
1096 unique_lock<mutex> lock(map_m);
1097 assert(card_num < int(num_cards));
1098 signal_to_card_mapping[signal_num] = card_num;
1101 void Theme::transition_clicked(int transition_num, float t)
1103 unique_lock<mutex> lock(m);
1104 lua_getglobal(L, "transition_clicked");
1105 lua_pushnumber(L, transition_num);
1106 lua_pushnumber(L, t);
1108 if (lua_pcall(L, 2, 0, 0) != 0) {
1109 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
1112 assert(lua_gettop(L) == 0);
1115 void Theme::channel_clicked(int preview_num)
1117 unique_lock<mutex> lock(m);
1118 lua_getglobal(L, "channel_clicked");
1119 lua_pushnumber(L, preview_num);
1121 if (lua_pcall(L, 1, 0, 0) != 0) {
1122 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
1125 assert(lua_gettop(L) == 0);