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_8BitBGRA,
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 VideoInput_rewind(lua_State* L)
357 assert(lua_gettop(L) == 1);
358 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
359 (*video_input)->rewind();
363 int VideoInput_change_rate(lua_State* L)
365 assert(lua_gettop(L) == 2);
366 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
367 double new_rate = luaL_checknumber(L, 2);
368 (*video_input)->change_rate(new_rate);
372 int VideoInput_get_signal_num(lua_State* L)
374 assert(lua_gettop(L) == 1);
375 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
376 lua_pushnumber(L, -1 - (*video_input)->get_card_index());
380 int WhiteBalanceEffect_new(lua_State* L)
382 assert(lua_gettop(L) == 0);
383 return wrap_lua_object_nonowned<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
386 int ResampleEffect_new(lua_State* L)
388 assert(lua_gettop(L) == 0);
389 return wrap_lua_object_nonowned<ResampleEffect>(L, "ResampleEffect");
392 int PaddingEffect_new(lua_State* L)
394 assert(lua_gettop(L) == 0);
395 return wrap_lua_object_nonowned<PaddingEffect>(L, "PaddingEffect");
398 int IntegralPaddingEffect_new(lua_State* L)
400 assert(lua_gettop(L) == 0);
401 return wrap_lua_object_nonowned<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
404 int OverlayEffect_new(lua_State* L)
406 assert(lua_gettop(L) == 0);
407 return wrap_lua_object_nonowned<OverlayEffect>(L, "OverlayEffect");
410 int ResizeEffect_new(lua_State* L)
412 assert(lua_gettop(L) == 0);
413 return wrap_lua_object_nonowned<ResizeEffect>(L, "ResizeEffect");
416 int MultiplyEffect_new(lua_State* L)
418 assert(lua_gettop(L) == 0);
419 return wrap_lua_object_nonowned<MultiplyEffect>(L, "MultiplyEffect");
422 int MixEffect_new(lua_State* L)
424 assert(lua_gettop(L) == 0);
425 return wrap_lua_object_nonowned<MixEffect>(L, "MixEffect");
428 int InputStateInfo_get_width(lua_State* L)
430 assert(lua_gettop(L) == 2);
431 InputStateInfo *input_state_info = get_input_state_info(L, 1);
432 Theme *theme = get_theme_updata(L);
433 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
434 lua_pushnumber(L, input_state_info->last_width[signal_num]);
438 int InputStateInfo_get_height(lua_State* L)
440 assert(lua_gettop(L) == 2);
441 InputStateInfo *input_state_info = get_input_state_info(L, 1);
442 Theme *theme = get_theme_updata(L);
443 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
444 lua_pushnumber(L, input_state_info->last_height[signal_num]);
448 int InputStateInfo_get_interlaced(lua_State* L)
450 assert(lua_gettop(L) == 2);
451 InputStateInfo *input_state_info = get_input_state_info(L, 1);
452 Theme *theme = get_theme_updata(L);
453 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
454 lua_pushboolean(L, input_state_info->last_interlaced[signal_num]);
458 int InputStateInfo_get_has_signal(lua_State* L)
460 assert(lua_gettop(L) == 2);
461 InputStateInfo *input_state_info = get_input_state_info(L, 1);
462 Theme *theme = get_theme_updata(L);
463 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
464 lua_pushboolean(L, input_state_info->last_has_signal[signal_num]);
468 int InputStateInfo_get_is_connected(lua_State* L)
470 assert(lua_gettop(L) == 2);
471 InputStateInfo *input_state_info = get_input_state_info(L, 1);
472 Theme *theme = get_theme_updata(L);
473 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
474 lua_pushboolean(L, input_state_info->last_is_connected[signal_num]);
478 int InputStateInfo_get_frame_rate_nom(lua_State* L)
480 assert(lua_gettop(L) == 2);
481 InputStateInfo *input_state_info = get_input_state_info(L, 1);
482 Theme *theme = get_theme_updata(L);
483 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
484 lua_pushnumber(L, input_state_info->last_frame_rate_nom[signal_num]);
488 int InputStateInfo_get_frame_rate_den(lua_State* L)
490 assert(lua_gettop(L) == 2);
491 InputStateInfo *input_state_info = get_input_state_info(L, 1);
492 Theme *theme = get_theme_updata(L);
493 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
494 lua_pushnumber(L, input_state_info->last_frame_rate_den[signal_num]);
498 int Effect_set_float(lua_State *L)
500 assert(lua_gettop(L) == 3);
501 Effect *effect = (Effect *)get_effect(L, 1);
502 string key = checkstdstring(L, 2);
503 float value = luaL_checknumber(L, 3);
504 if (!effect->set_float(key, value)) {
505 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
510 int Effect_set_int(lua_State *L)
512 assert(lua_gettop(L) == 3);
513 Effect *effect = (Effect *)get_effect(L, 1);
514 string key = checkstdstring(L, 2);
515 float value = luaL_checknumber(L, 3);
516 if (!effect->set_int(key, value)) {
517 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
522 int Effect_set_vec3(lua_State *L)
524 assert(lua_gettop(L) == 5);
525 Effect *effect = (Effect *)get_effect(L, 1);
526 string key = checkstdstring(L, 2);
528 v[0] = luaL_checknumber(L, 3);
529 v[1] = luaL_checknumber(L, 4);
530 v[2] = luaL_checknumber(L, 5);
531 if (!effect->set_vec3(key, v)) {
532 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", key.c_str(),
538 int Effect_set_vec4(lua_State *L)
540 assert(lua_gettop(L) == 6);
541 Effect *effect = (Effect *)get_effect(L, 1);
542 string key = checkstdstring(L, 2);
544 v[0] = luaL_checknumber(L, 3);
545 v[1] = luaL_checknumber(L, 4);
546 v[2] = luaL_checknumber(L, 5);
547 v[3] = luaL_checknumber(L, 6);
548 if (!effect->set_vec4(key, v)) {
549 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", key.c_str(),
550 v[0], v[1], v[2], v[3]);
555 const luaL_Reg EffectChain_funcs[] = {
556 { "new", EffectChain_new },
557 { "__gc", EffectChain_gc },
558 { "add_live_input", EffectChain_add_live_input },
559 { "add_video_input", EffectChain_add_video_input },
560 { "add_effect", EffectChain_add_effect },
561 { "finalize", EffectChain_finalize },
565 const luaL_Reg LiveInputWrapper_funcs[] = {
566 { "connect_signal", LiveInputWrapper_connect_signal },
570 const luaL_Reg ImageInput_funcs[] = {
571 { "new", ImageInput_new },
572 { "set_float", Effect_set_float },
573 { "set_int", Effect_set_int },
574 { "set_vec3", Effect_set_vec3 },
575 { "set_vec4", Effect_set_vec4 },
579 const luaL_Reg VideoInput_funcs[] = {
580 { "new", VideoInput_new },
581 { "rewind", VideoInput_rewind },
582 { "change_rate", VideoInput_change_rate },
583 { "get_signal_num", VideoInput_get_signal_num },
587 const luaL_Reg WhiteBalanceEffect_funcs[] = {
588 { "new", WhiteBalanceEffect_new },
589 { "set_float", Effect_set_float },
590 { "set_int", Effect_set_int },
591 { "set_vec3", Effect_set_vec3 },
592 { "set_vec4", Effect_set_vec4 },
596 const luaL_Reg ResampleEffect_funcs[] = {
597 { "new", ResampleEffect_new },
598 { "set_float", Effect_set_float },
599 { "set_int", Effect_set_int },
600 { "set_vec3", Effect_set_vec3 },
601 { "set_vec4", Effect_set_vec4 },
605 const luaL_Reg PaddingEffect_funcs[] = {
606 { "new", PaddingEffect_new },
607 { "set_float", Effect_set_float },
608 { "set_int", Effect_set_int },
609 { "set_vec3", Effect_set_vec3 },
610 { "set_vec4", Effect_set_vec4 },
614 const luaL_Reg IntegralPaddingEffect_funcs[] = {
615 { "new", IntegralPaddingEffect_new },
616 { "set_float", Effect_set_float },
617 { "set_int", Effect_set_int },
618 { "set_vec3", Effect_set_vec3 },
619 { "set_vec4", Effect_set_vec4 },
623 const luaL_Reg OverlayEffect_funcs[] = {
624 { "new", OverlayEffect_new },
625 { "set_float", Effect_set_float },
626 { "set_int", Effect_set_int },
627 { "set_vec3", Effect_set_vec3 },
628 { "set_vec4", Effect_set_vec4 },
632 const luaL_Reg ResizeEffect_funcs[] = {
633 { "new", ResizeEffect_new },
634 { "set_float", Effect_set_float },
635 { "set_int", Effect_set_int },
636 { "set_vec3", Effect_set_vec3 },
637 { "set_vec4", Effect_set_vec4 },
641 const luaL_Reg MultiplyEffect_funcs[] = {
642 { "new", MultiplyEffect_new },
643 { "set_float", Effect_set_float },
644 { "set_int", Effect_set_int },
645 { "set_vec3", Effect_set_vec3 },
646 { "set_vec4", Effect_set_vec4 },
650 const luaL_Reg MixEffect_funcs[] = {
651 { "new", MixEffect_new },
652 { "set_float", Effect_set_float },
653 { "set_int", Effect_set_int },
654 { "set_vec3", Effect_set_vec3 },
655 { "set_vec4", Effect_set_vec4 },
659 const luaL_Reg InputStateInfo_funcs[] = {
660 { "get_width", InputStateInfo_get_width },
661 { "get_height", InputStateInfo_get_height },
662 { "get_interlaced", InputStateInfo_get_interlaced },
663 { "get_has_signal", InputStateInfo_get_has_signal },
664 { "get_is_connected", InputStateInfo_get_is_connected },
665 { "get_frame_rate_nom", InputStateInfo_get_frame_rate_nom },
666 { "get_frame_rate_den", InputStateInfo_get_frame_rate_den },
672 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain, bmusb::PixelFormat pixel_format, bool override_bounce, bool deinterlace)
674 pixel_format(pixel_format),
675 deinterlace(deinterlace)
677 ImageFormat inout_format;
678 inout_format.color_space = COLORSPACE_sRGB;
680 // Gamma curve depends on the input signal, and we don't really get any
681 // indications. A camera would be expected to do Rec. 709, but
682 // I haven't checked if any do in practice. However, computers _do_ output
683 // in sRGB gamma (ie., they don't convert from sRGB to Rec. 709), and
684 // I wouldn't really be surprised if most non-professional cameras do, too.
685 // So we pick sRGB as the least evil here.
686 inout_format.gamma_curve = GAMMA_sRGB;
690 deinterlace_effect = new movit::DeinterlaceEffect();
692 // As per the comments in deinterlace_effect.h, we turn this off.
693 // The most likely interlaced input for us is either a camera
694 // (where it's fine to turn it off) or a laptop (where it _should_
696 CHECK(deinterlace_effect->set_int("enable_spatial_interlacing_check", 0));
698 num_inputs = deinterlace_effect->num_inputs();
699 assert(num_inputs == FRAME_HISTORY_LENGTH);
704 if (pixel_format == bmusb::PixelFormat_8BitBGRA) {
705 for (unsigned i = 0; i < num_inputs; ++i) {
706 // We upload our textures ourselves, and Movit swaps
707 // R and B in the shader if we specify BGRA, so lie and say RGBA.
708 if (global_flags.can_disable_srgb_decoder) {
709 rgba_inputs.push_back(new sRGBSwitchingFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
711 rgba_inputs.push_back(new NonsRGBCapableFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
713 chain->add_input(rgba_inputs.back());
717 vector<Effect *> reverse_inputs(rgba_inputs.rbegin(), rgba_inputs.rend());
718 chain->add_effect(deinterlace_effect, reverse_inputs);
721 assert(pixel_format == bmusb::PixelFormat_8BitYCbCr || pixel_format == bmusb::PixelFormat_10BitYCbCr);
722 input_ycbcr_format.chroma_subsampling_x = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1 : 2;
723 input_ycbcr_format.chroma_subsampling_y = 1;
724 input_ycbcr_format.num_levels = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1024 : 256;
725 input_ycbcr_format.cb_x_position = 0.0;
726 input_ycbcr_format.cr_x_position = 0.0;
727 input_ycbcr_format.cb_y_position = 0.5;
728 input_ycbcr_format.cr_y_position = 0.5;
729 input_ycbcr_format.luma_coefficients = YCBCR_REC_709; // Will be overridden later.
730 input_ycbcr_format.full_range = false; // Will be overridden later.
732 for (unsigned i = 0; i < num_inputs; ++i) {
733 // When using 10-bit input, we're converting to interleaved through v210Converter.
734 YCbCrInputSplitting splitting = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? YCBCR_INPUT_INTERLEAVED : YCBCR_INPUT_SPLIT_Y_AND_CBCR;
735 if (override_bounce) {
736 ycbcr_inputs.push_back(new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
738 ycbcr_inputs.push_back(new YCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
740 chain->add_input(ycbcr_inputs.back());
744 vector<Effect *> reverse_inputs(ycbcr_inputs.rbegin(), ycbcr_inputs.rend());
745 chain->add_effect(deinterlace_effect, reverse_inputs);
750 void LiveInputWrapper::connect_signal(int signal_num)
752 if (global_mixer == nullptr) {
757 signal_num = theme->map_signal(signal_num);
758 connect_signal_raw(signal_num);
761 void LiveInputWrapper::connect_signal_raw(int signal_num)
763 BufferedFrame first_frame = theme->input_state->buffered_frames[signal_num][0];
764 if (first_frame.frame == nullptr) {
768 unsigned width, height;
770 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)first_frame.frame->userdata;
771 width = userdata->last_width[first_frame.field_number];
772 height = userdata->last_height[first_frame.field_number];
775 movit::YCbCrLumaCoefficients ycbcr_coefficients = theme->input_state->ycbcr_coefficients[signal_num];
776 bool full_range = theme->input_state->full_range[signal_num];
778 if (theme->input_state->ycbcr_coefficients_auto[signal_num]) {
781 // The Blackmagic driver docs claim that the device outputs Y'CbCr
782 // according to Rec. 601, but this seems to indicate the subsampling
783 // positions only, as they publish Y'CbCr → RGB formulas that are
784 // different for HD and SD (corresponding to Rec. 709 and 601, respectively),
785 // and a Lenovo X1 gen 3 I used to test definitely outputs Rec. 709
786 // (at least up to rounding error). Other devices seem to use Rec. 601
787 // even on HD resolutions. Nevertheless, Rec. 709 _is_ the right choice
788 // for HD, so we default to that if the user hasn't set anything.
790 ycbcr_coefficients = YCBCR_REC_709;
792 ycbcr_coefficients = YCBCR_REC_601;
796 // This is a global, but it doesn't really matter.
797 input_ycbcr_format.luma_coefficients = ycbcr_coefficients;
798 input_ycbcr_format.full_range = full_range;
800 BufferedFrame last_good_frame = first_frame;
801 for (unsigned i = 0; i < max(ycbcr_inputs.size(), rgba_inputs.size()); ++i) {
802 BufferedFrame frame = theme->input_state->buffered_frames[signal_num][i];
803 if (frame.frame == nullptr) {
804 // Not enough data; reuse last frame (well, field).
805 // This is suboptimal, but we have nothing better.
806 frame = last_good_frame;
808 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
810 unsigned this_width = userdata->last_width[frame.field_number];
811 unsigned this_height = userdata->last_height[frame.field_number];
812 if (this_width != width || this_height != height) {
813 // Resolution changed; reuse last frame/field.
814 frame = last_good_frame;
815 userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
818 assert(userdata->pixel_format == pixel_format);
819 switch (pixel_format) {
820 case bmusb::PixelFormat_8BitYCbCr:
821 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
822 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cbcr[frame.field_number]);
823 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
824 ycbcr_inputs[i]->set_width(width);
825 ycbcr_inputs[i]->set_height(height);
827 case bmusb::PixelFormat_10BitYCbCr:
828 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_444[frame.field_number]);
829 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
830 ycbcr_inputs[i]->set_width(width);
831 ycbcr_inputs[i]->set_height(height);
833 case bmusb::PixelFormat_8BitBGRA:
834 rgba_inputs[i]->set_texture_num(userdata->tex_rgba[frame.field_number]);
835 rgba_inputs[i]->set_width(width);
836 rgba_inputs[i]->set_height(height);
842 last_good_frame = frame;
846 BufferedFrame frame = theme->input_state->buffered_frames[signal_num][0];
847 CHECK(deinterlace_effect->set_int("current_field_position", frame.field_number));
853 int call_num_channels(lua_State *L)
855 lua_getglobal(L, "num_channels");
857 if (lua_pcall(L, 0, 1, 0) != 0) {
858 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
862 int num_channels = luaL_checknumber(L, 1);
864 assert(lua_gettop(L) == 0);
870 Theme::Theme(const string &filename, const vector<string> &search_dirs, ResourcePool *resource_pool, unsigned num_cards)
871 : resource_pool(resource_pool), num_cards(num_cards), signal_to_card_mapping(global_flags.default_stream_mapping)
876 register_class("EffectChain", EffectChain_funcs);
877 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
878 register_class("ImageInput", ImageInput_funcs);
879 register_class("VideoInput", VideoInput_funcs);
880 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
881 register_class("ResampleEffect", ResampleEffect_funcs);
882 register_class("PaddingEffect", PaddingEffect_funcs);
883 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
884 register_class("OverlayEffect", OverlayEffect_funcs);
885 register_class("ResizeEffect", ResizeEffect_funcs);
886 register_class("MultiplyEffect", MultiplyEffect_funcs);
887 register_class("MixEffect", MixEffect_funcs);
888 register_class("InputStateInfo", InputStateInfo_funcs);
890 // Run script. Search through all directories until we find a file that will load
891 // (as in, does not return LUA_ERRFILE); then run it. We store load errors
892 // from all the attempts, and show them once we know we can't find any of them.
894 vector<string> errors;
895 bool success = false;
896 for (size_t i = 0; i < search_dirs.size(); ++i) {
897 string path = search_dirs[i] + "/" + filename;
898 int err = luaL_loadfile(L, path.c_str());
900 // Success; actually call the code.
901 if (lua_pcall(L, 0, LUA_MULTRET, 0)) {
902 fprintf(stderr, "Error when running %s: %s\n", path.c_str(), lua_tostring(L, -1));
908 errors.push_back(lua_tostring(L, -1));
910 if (err != LUA_ERRFILE) {
911 // The file actually loaded, but failed to parse somehow. Abort; don't try the next one.
917 for (const string &error : errors) {
918 fprintf(stderr, "%s\n", error.c_str());
922 assert(lua_gettop(L) == 0);
924 // Ask it for the number of channels.
925 num_channels = call_num_channels(L);
933 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
935 assert(lua_gettop(L) == 0);
936 luaL_newmetatable(L, class_name); // mt = {}
937 lua_pushlightuserdata(L, this);
938 luaL_setfuncs(L, funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
939 lua_pushvalue(L, -1);
940 lua_setfield(L, -2, "__index"); // mt.__index = mt
941 lua_setglobal(L, class_name); // ClassName = mt
942 assert(lua_gettop(L) == 0);
945 Theme::Chain Theme::get_chain(unsigned num, float t, unsigned width, unsigned height, InputState input_state)
949 unique_lock<mutex> lock(m);
950 assert(lua_gettop(L) == 0);
951 lua_getglobal(L, "get_chain"); /* function to be called */
952 lua_pushnumber(L, num);
953 lua_pushnumber(L, t);
954 lua_pushnumber(L, width);
955 lua_pushnumber(L, height);
956 wrap_lua_object<InputStateInfo>(L, "InputStateInfo", input_state);
958 if (lua_pcall(L, 5, 2, 0) != 0) {
959 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
963 chain.chain = (EffectChain *)luaL_testudata(L, -2, "EffectChain");
964 if (chain.chain == nullptr) {
965 fprintf(stderr, "get_chain() for chain number %d did not return an EffectChain\n",
969 if (!lua_isfunction(L, -1)) {
970 fprintf(stderr, "Argument #-1 should be a function\n");
973 lua_pushvalue(L, -1);
974 shared_ptr<LuaRefWithDeleter> funcref(new LuaRefWithDeleter(&m, L, luaL_ref(L, LUA_REGISTRYINDEX)));
976 assert(lua_gettop(L) == 0);
978 chain.setup_chain = [this, funcref, input_state]{
979 unique_lock<mutex> lock(m);
981 this->input_state = &input_state;
983 // Set up state, including connecting signals.
984 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref->get());
985 if (lua_pcall(L, 0, 0, 0) != 0) {
986 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
989 assert(lua_gettop(L) == 0);
992 // TODO: Can we do better, e.g. by running setup_chain() and seeing what it references?
993 // Actually, setup_chain does maybe hold all the references we need now anyway?
994 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
995 for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
996 chain.input_frames.push_back(input_state.buffered_frames[card_index][frame_num].frame);
1003 string Theme::get_channel_name(unsigned channel)
1005 unique_lock<mutex> lock(m);
1006 lua_getglobal(L, "channel_name");
1007 lua_pushnumber(L, channel);
1008 if (lua_pcall(L, 1, 1, 0) != 0) {
1009 fprintf(stderr, "error running function `channel_name': %s\n", lua_tostring(L, -1));
1012 const char *ret = lua_tostring(L, -1);
1013 if (ret == nullptr) {
1014 fprintf(stderr, "function `channel_name' returned nil for channel %d\n", channel);
1018 string retstr = ret;
1020 assert(lua_gettop(L) == 0);
1024 int Theme::get_channel_signal(unsigned channel)
1026 unique_lock<mutex> lock(m);
1027 lua_getglobal(L, "channel_signal");
1028 lua_pushnumber(L, channel);
1029 if (lua_pcall(L, 1, 1, 0) != 0) {
1030 fprintf(stderr, "error running function `channel_signal': %s\n", lua_tostring(L, -1));
1034 int ret = luaL_checknumber(L, 1);
1036 assert(lua_gettop(L) == 0);
1040 std::string Theme::get_channel_color(unsigned channel)
1042 unique_lock<mutex> lock(m);
1043 lua_getglobal(L, "channel_color");
1044 lua_pushnumber(L, channel);
1045 if (lua_pcall(L, 1, 1, 0) != 0) {
1046 fprintf(stderr, "error running function `channel_color': %s\n", lua_tostring(L, -1));
1050 const char *ret = lua_tostring(L, -1);
1051 if (ret == nullptr) {
1052 fprintf(stderr, "function `channel_color' returned nil for channel %d\n", channel);
1056 string retstr = ret;
1058 assert(lua_gettop(L) == 0);
1062 bool Theme::get_supports_set_wb(unsigned channel)
1064 unique_lock<mutex> lock(m);
1065 lua_getglobal(L, "supports_set_wb");
1066 lua_pushnumber(L, channel);
1067 if (lua_pcall(L, 1, 1, 0) != 0) {
1068 fprintf(stderr, "error running function `supports_set_wb': %s\n", lua_tostring(L, -1));
1072 bool ret = checkbool(L, -1);
1074 assert(lua_gettop(L) == 0);
1078 void Theme::set_wb(unsigned channel, double r, double g, double b)
1080 unique_lock<mutex> lock(m);
1081 lua_getglobal(L, "set_wb");
1082 lua_pushnumber(L, channel);
1083 lua_pushnumber(L, r);
1084 lua_pushnumber(L, g);
1085 lua_pushnumber(L, b);
1086 if (lua_pcall(L, 4, 0, 0) != 0) {
1087 fprintf(stderr, "error running function `set_wb': %s\n", lua_tostring(L, -1));
1091 assert(lua_gettop(L) == 0);
1094 vector<string> Theme::get_transition_names(float t)
1096 unique_lock<mutex> lock(m);
1097 lua_getglobal(L, "get_transitions");
1098 lua_pushnumber(L, t);
1099 if (lua_pcall(L, 1, 1, 0) != 0) {
1100 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
1106 while (lua_next(L, -2) != 0) {
1107 ret.push_back(lua_tostring(L, -1));
1111 assert(lua_gettop(L) == 0);
1115 int Theme::map_signal(int signal_num)
1117 // Negative numbers map to raw signals.
1118 if (signal_num < 0) {
1119 return -1 - signal_num;
1122 unique_lock<mutex> lock(map_m);
1123 if (signal_to_card_mapping.count(signal_num)) {
1124 return signal_to_card_mapping[signal_num];
1128 if (global_flags.output_card != -1 && num_cards > 1) {
1129 // Try to exclude the output card from the default card_index.
1130 card_index = signal_num % (num_cards - 1);
1131 if (card_index >= global_flags.output_card) {
1134 if (signal_num >= int(num_cards - 1)) {
1135 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u input card(s) (card %d is busy with output).\n",
1136 signal_num, num_cards - 1, global_flags.output_card);
1137 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1140 card_index = signal_num % num_cards;
1141 if (signal_num >= int(num_cards)) {
1142 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u card(s).\n", signal_num, num_cards);
1143 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1146 signal_to_card_mapping[signal_num] = card_index;
1150 void Theme::set_signal_mapping(int signal_num, int card_num)
1152 unique_lock<mutex> lock(map_m);
1153 assert(card_num < int(num_cards));
1154 signal_to_card_mapping[signal_num] = card_num;
1157 void Theme::transition_clicked(int transition_num, float t)
1159 unique_lock<mutex> lock(m);
1160 lua_getglobal(L, "transition_clicked");
1161 lua_pushnumber(L, transition_num);
1162 lua_pushnumber(L, t);
1164 if (lua_pcall(L, 2, 0, 0) != 0) {
1165 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
1168 assert(lua_gettop(L) == 0);
1171 void Theme::channel_clicked(int preview_num)
1173 unique_lock<mutex> lock(m);
1174 lua_getglobal(L, "channel_clicked");
1175 lua_pushnumber(L, preview_num);
1177 if (lua_pcall(L, 1, 0, 0) != 0) {
1178 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
1181 assert(lua_gettop(L) == 0);