4 #include <bmusb/bmusb.h>
8 #include <movit/deinterlace_effect.h>
9 #include <movit/effect.h>
10 #include <movit/effect_chain.h>
11 #include <movit/image_format.h>
12 #include <movit/input.h>
13 #include <movit/mix_effect.h>
14 #include <movit/multiply_effect.h>
15 #include <movit/overlay_effect.h>
16 #include <movit/padding_effect.h>
17 #include <movit/resample_effect.h>
18 #include <movit/resize_effect.h>
19 #include <movit/util.h>
20 #include <movit/white_balance_effect.h>
21 #include <movit/ycbcr.h>
22 #include <movit/ycbcr_input.h>
31 #include "ffmpeg_capture.h"
33 #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, (*capture)->get_current_pixel_format(),
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) == 2);
345 string filename = checkstdstring(L, 1);
346 int pixel_format = luaL_checknumber(L, 2);
347 if (pixel_format != bmusb::PixelFormat_8BitYCbCrPlanar &&
348 pixel_format != bmusb::PixelFormat_8BitBGRA) {
349 fprintf(stderr, "WARNING: Invalid enum %d used for video format, choosing Y'CbCr.\n",
351 pixel_format = bmusb::PixelFormat_8BitYCbCrPlanar;
353 int ret = wrap_lua_object_nonowned<FFmpegCapture>(L, "VideoInput", filename, global_flags.width, global_flags.height);
355 FFmpegCapture **capture = (FFmpegCapture **)lua_touserdata(L, -1);
356 (*capture)->set_pixel_format(bmusb::PixelFormat(pixel_format));
358 Theme *theme = get_theme_updata(L);
359 theme->register_video_input(*capture);
364 int VideoInput_rewind(lua_State* L)
366 assert(lua_gettop(L) == 1);
367 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
368 (*video_input)->rewind();
372 int VideoInput_change_rate(lua_State* L)
374 assert(lua_gettop(L) == 2);
375 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
376 double new_rate = luaL_checknumber(L, 2);
377 (*video_input)->change_rate(new_rate);
381 int VideoInput_get_signal_num(lua_State* L)
383 assert(lua_gettop(L) == 1);
384 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
385 lua_pushnumber(L, -1 - (*video_input)->get_card_index());
389 int WhiteBalanceEffect_new(lua_State* L)
391 assert(lua_gettop(L) == 0);
392 return wrap_lua_object_nonowned<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
395 int ResampleEffect_new(lua_State* L)
397 assert(lua_gettop(L) == 0);
398 return wrap_lua_object_nonowned<ResampleEffect>(L, "ResampleEffect");
401 int PaddingEffect_new(lua_State* L)
403 assert(lua_gettop(L) == 0);
404 return wrap_lua_object_nonowned<PaddingEffect>(L, "PaddingEffect");
407 int IntegralPaddingEffect_new(lua_State* L)
409 assert(lua_gettop(L) == 0);
410 return wrap_lua_object_nonowned<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
413 int OverlayEffect_new(lua_State* L)
415 assert(lua_gettop(L) == 0);
416 return wrap_lua_object_nonowned<OverlayEffect>(L, "OverlayEffect");
419 int ResizeEffect_new(lua_State* L)
421 assert(lua_gettop(L) == 0);
422 return wrap_lua_object_nonowned<ResizeEffect>(L, "ResizeEffect");
425 int MultiplyEffect_new(lua_State* L)
427 assert(lua_gettop(L) == 0);
428 return wrap_lua_object_nonowned<MultiplyEffect>(L, "MultiplyEffect");
431 int MixEffect_new(lua_State* L)
433 assert(lua_gettop(L) == 0);
434 return wrap_lua_object_nonowned<MixEffect>(L, "MixEffect");
437 int InputStateInfo_get_width(lua_State* L)
439 assert(lua_gettop(L) == 2);
440 InputStateInfo *input_state_info = get_input_state_info(L, 1);
441 Theme *theme = get_theme_updata(L);
442 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
443 lua_pushnumber(L, input_state_info->last_width[signal_num]);
447 int InputStateInfo_get_height(lua_State* L)
449 assert(lua_gettop(L) == 2);
450 InputStateInfo *input_state_info = get_input_state_info(L, 1);
451 Theme *theme = get_theme_updata(L);
452 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
453 lua_pushnumber(L, input_state_info->last_height[signal_num]);
457 int InputStateInfo_get_interlaced(lua_State* L)
459 assert(lua_gettop(L) == 2);
460 InputStateInfo *input_state_info = get_input_state_info(L, 1);
461 Theme *theme = get_theme_updata(L);
462 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
463 lua_pushboolean(L, input_state_info->last_interlaced[signal_num]);
467 int InputStateInfo_get_has_signal(lua_State* L)
469 assert(lua_gettop(L) == 2);
470 InputStateInfo *input_state_info = get_input_state_info(L, 1);
471 Theme *theme = get_theme_updata(L);
472 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
473 lua_pushboolean(L, input_state_info->last_has_signal[signal_num]);
477 int InputStateInfo_get_is_connected(lua_State* L)
479 assert(lua_gettop(L) == 2);
480 InputStateInfo *input_state_info = get_input_state_info(L, 1);
481 Theme *theme = get_theme_updata(L);
482 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
483 lua_pushboolean(L, input_state_info->last_is_connected[signal_num]);
487 int InputStateInfo_get_frame_rate_nom(lua_State* L)
489 assert(lua_gettop(L) == 2);
490 InputStateInfo *input_state_info = get_input_state_info(L, 1);
491 Theme *theme = get_theme_updata(L);
492 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
493 lua_pushnumber(L, input_state_info->last_frame_rate_nom[signal_num]);
497 int InputStateInfo_get_frame_rate_den(lua_State* L)
499 assert(lua_gettop(L) == 2);
500 InputStateInfo *input_state_info = get_input_state_info(L, 1);
501 Theme *theme = get_theme_updata(L);
502 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
503 lua_pushnumber(L, input_state_info->last_frame_rate_den[signal_num]);
507 int Effect_set_float(lua_State *L)
509 assert(lua_gettop(L) == 3);
510 Effect *effect = (Effect *)get_effect(L, 1);
511 string key = checkstdstring(L, 2);
512 float value = luaL_checknumber(L, 3);
513 if (!effect->set_float(key, value)) {
514 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
519 int Effect_set_int(lua_State *L)
521 assert(lua_gettop(L) == 3);
522 Effect *effect = (Effect *)get_effect(L, 1);
523 string key = checkstdstring(L, 2);
524 float value = luaL_checknumber(L, 3);
525 if (!effect->set_int(key, value)) {
526 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
531 int Effect_set_vec3(lua_State *L)
533 assert(lua_gettop(L) == 5);
534 Effect *effect = (Effect *)get_effect(L, 1);
535 string key = checkstdstring(L, 2);
537 v[0] = luaL_checknumber(L, 3);
538 v[1] = luaL_checknumber(L, 4);
539 v[2] = luaL_checknumber(L, 5);
540 if (!effect->set_vec3(key, v)) {
541 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", key.c_str(),
547 int Effect_set_vec4(lua_State *L)
549 assert(lua_gettop(L) == 6);
550 Effect *effect = (Effect *)get_effect(L, 1);
551 string key = checkstdstring(L, 2);
553 v[0] = luaL_checknumber(L, 3);
554 v[1] = luaL_checknumber(L, 4);
555 v[2] = luaL_checknumber(L, 5);
556 v[3] = luaL_checknumber(L, 6);
557 if (!effect->set_vec4(key, v)) {
558 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", key.c_str(),
559 v[0], v[1], v[2], v[3]);
564 const luaL_Reg EffectChain_funcs[] = {
565 { "new", EffectChain_new },
566 { "__gc", EffectChain_gc },
567 { "add_live_input", EffectChain_add_live_input },
568 { "add_video_input", EffectChain_add_video_input },
569 { "add_effect", EffectChain_add_effect },
570 { "finalize", EffectChain_finalize },
574 const luaL_Reg LiveInputWrapper_funcs[] = {
575 { "connect_signal", LiveInputWrapper_connect_signal },
579 const luaL_Reg ImageInput_funcs[] = {
580 { "new", ImageInput_new },
581 { "set_float", Effect_set_float },
582 { "set_int", Effect_set_int },
583 { "set_vec3", Effect_set_vec3 },
584 { "set_vec4", Effect_set_vec4 },
588 const luaL_Reg VideoInput_funcs[] = {
589 { "new", VideoInput_new },
590 { "rewind", VideoInput_rewind },
591 { "change_rate", VideoInput_change_rate },
592 { "get_signal_num", VideoInput_get_signal_num },
596 const luaL_Reg WhiteBalanceEffect_funcs[] = {
597 { "new", WhiteBalanceEffect_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 ResampleEffect_funcs[] = {
606 { "new", ResampleEffect_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 PaddingEffect_funcs[] = {
615 { "new", PaddingEffect_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 IntegralPaddingEffect_funcs[] = {
624 { "new", IntegralPaddingEffect_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 OverlayEffect_funcs[] = {
633 { "new", OverlayEffect_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 ResizeEffect_funcs[] = {
642 { "new", ResizeEffect_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 MultiplyEffect_funcs[] = {
651 { "new", MultiplyEffect_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 MixEffect_funcs[] = {
660 { "new", MixEffect_new },
661 { "set_float", Effect_set_float },
662 { "set_int", Effect_set_int },
663 { "set_vec3", Effect_set_vec3 },
664 { "set_vec4", Effect_set_vec4 },
668 const luaL_Reg InputStateInfo_funcs[] = {
669 { "get_width", InputStateInfo_get_width },
670 { "get_height", InputStateInfo_get_height },
671 { "get_interlaced", InputStateInfo_get_interlaced },
672 { "get_has_signal", InputStateInfo_get_has_signal },
673 { "get_is_connected", InputStateInfo_get_is_connected },
674 { "get_frame_rate_nom", InputStateInfo_get_frame_rate_nom },
675 { "get_frame_rate_den", InputStateInfo_get_frame_rate_den },
681 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain, bmusb::PixelFormat pixel_format, bool override_bounce, bool deinterlace)
683 pixel_format(pixel_format),
684 deinterlace(deinterlace)
686 ImageFormat inout_format;
687 inout_format.color_space = COLORSPACE_sRGB;
689 // Gamma curve depends on the input signal, and we don't really get any
690 // indications. A camera would be expected to do Rec. 709, but
691 // I haven't checked if any do in practice. However, computers _do_ output
692 // in sRGB gamma (ie., they don't convert from sRGB to Rec. 709), and
693 // I wouldn't really be surprised if most non-professional cameras do, too.
694 // So we pick sRGB as the least evil here.
695 inout_format.gamma_curve = GAMMA_sRGB;
699 deinterlace_effect = new movit::DeinterlaceEffect();
701 // As per the comments in deinterlace_effect.h, we turn this off.
702 // The most likely interlaced input for us is either a camera
703 // (where it's fine to turn it off) or a laptop (where it _should_
705 CHECK(deinterlace_effect->set_int("enable_spatial_interlacing_check", 0));
707 num_inputs = deinterlace_effect->num_inputs();
708 assert(num_inputs == FRAME_HISTORY_LENGTH);
713 if (pixel_format == bmusb::PixelFormat_8BitBGRA) {
714 for (unsigned i = 0; i < num_inputs; ++i) {
715 // We upload our textures ourselves, and Movit swaps
716 // R and B in the shader if we specify BGRA, so lie and say RGBA.
717 if (global_flags.can_disable_srgb_decoder) {
718 rgba_inputs.push_back(new sRGBSwitchingFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
720 rgba_inputs.push_back(new NonsRGBCapableFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
722 chain->add_input(rgba_inputs.back());
726 vector<Effect *> reverse_inputs(rgba_inputs.rbegin(), rgba_inputs.rend());
727 chain->add_effect(deinterlace_effect, reverse_inputs);
730 assert(pixel_format == bmusb::PixelFormat_8BitYCbCr ||
731 pixel_format == bmusb::PixelFormat_10BitYCbCr ||
732 pixel_format == bmusb::PixelFormat_8BitYCbCrPlanar);
734 // Most of these settings will be overridden later if using PixelFormat_8BitYCbCrPlanar.
735 input_ycbcr_format.chroma_subsampling_x = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1 : 2;
736 input_ycbcr_format.chroma_subsampling_y = 1;
737 input_ycbcr_format.num_levels = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1024 : 256;
738 input_ycbcr_format.cb_x_position = 0.0;
739 input_ycbcr_format.cr_x_position = 0.0;
740 input_ycbcr_format.cb_y_position = 0.5;
741 input_ycbcr_format.cr_y_position = 0.5;
742 input_ycbcr_format.luma_coefficients = YCBCR_REC_709; // Will be overridden later even if not planar.
743 input_ycbcr_format.full_range = false; // Will be overridden later even if not planar.
745 for (unsigned i = 0; i < num_inputs; ++i) {
746 // When using 10-bit input, we're converting to interleaved through v210Converter.
747 YCbCrInputSplitting splitting;
748 if (pixel_format == bmusb::PixelFormat_10BitYCbCr) {
749 splitting = YCBCR_INPUT_INTERLEAVED;
750 } else if (pixel_format == bmusb::PixelFormat_8BitYCbCr) {
751 splitting = YCBCR_INPUT_SPLIT_Y_AND_CBCR;
753 splitting = YCBCR_INPUT_PLANAR;
755 if (override_bounce) {
756 ycbcr_inputs.push_back(new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
758 ycbcr_inputs.push_back(new YCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
760 chain->add_input(ycbcr_inputs.back());
764 vector<Effect *> reverse_inputs(ycbcr_inputs.rbegin(), ycbcr_inputs.rend());
765 chain->add_effect(deinterlace_effect, reverse_inputs);
770 void LiveInputWrapper::connect_signal(int signal_num)
772 if (global_mixer == nullptr) {
777 signal_num = theme->map_signal(signal_num);
778 connect_signal_raw(signal_num);
781 void LiveInputWrapper::connect_signal_raw(int signal_num)
783 BufferedFrame first_frame = theme->input_state->buffered_frames[signal_num][0];
784 if (first_frame.frame == nullptr) {
788 unsigned width, height;
790 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)first_frame.frame->userdata;
791 width = userdata->last_width[first_frame.field_number];
792 height = userdata->last_height[first_frame.field_number];
795 movit::YCbCrLumaCoefficients ycbcr_coefficients = theme->input_state->ycbcr_coefficients[signal_num];
796 bool full_range = theme->input_state->full_range[signal_num];
798 if (theme->input_state->ycbcr_coefficients_auto[signal_num]) {
801 // The Blackmagic driver docs claim that the device outputs Y'CbCr
802 // according to Rec. 601, but this seems to indicate the subsampling
803 // positions only, as they publish Y'CbCr → RGB formulas that are
804 // different for HD and SD (corresponding to Rec. 709 and 601, respectively),
805 // and a Lenovo X1 gen 3 I used to test definitely outputs Rec. 709
806 // (at least up to rounding error). Other devices seem to use Rec. 601
807 // even on HD resolutions. Nevertheless, Rec. 709 _is_ the right choice
808 // for HD, so we default to that if the user hasn't set anything.
810 ycbcr_coefficients = YCBCR_REC_709;
812 ycbcr_coefficients = YCBCR_REC_601;
816 // This is a global, but it doesn't really matter.
817 input_ycbcr_format.luma_coefficients = ycbcr_coefficients;
818 input_ycbcr_format.full_range = full_range;
820 BufferedFrame last_good_frame = first_frame;
821 for (unsigned i = 0; i < max(ycbcr_inputs.size(), rgba_inputs.size()); ++i) {
822 BufferedFrame frame = theme->input_state->buffered_frames[signal_num][i];
823 if (frame.frame == nullptr) {
824 // Not enough data; reuse last frame (well, field).
825 // This is suboptimal, but we have nothing better.
826 frame = last_good_frame;
828 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
830 unsigned this_width = userdata->last_width[frame.field_number];
831 unsigned this_height = userdata->last_height[frame.field_number];
832 if (this_width != width || this_height != height) {
833 // Resolution changed; reuse last frame/field.
834 frame = last_good_frame;
835 userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
838 assert(userdata->pixel_format == pixel_format);
839 switch (pixel_format) {
840 case bmusb::PixelFormat_8BitYCbCr:
841 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
842 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cbcr[frame.field_number]);
843 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
844 ycbcr_inputs[i]->set_width(width);
845 ycbcr_inputs[i]->set_height(height);
847 case bmusb::PixelFormat_8BitYCbCrPlanar:
848 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
849 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cb[frame.field_number]);
850 ycbcr_inputs[i]->set_texture_num(2, userdata->tex_cr[frame.field_number]);
851 ycbcr_inputs[i]->change_ycbcr_format(userdata->ycbcr_format);
852 ycbcr_inputs[i]->set_width(width);
853 ycbcr_inputs[i]->set_height(height);
855 case bmusb::PixelFormat_10BitYCbCr:
856 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_444[frame.field_number]);
857 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
858 ycbcr_inputs[i]->set_width(width);
859 ycbcr_inputs[i]->set_height(height);
861 case bmusb::PixelFormat_8BitBGRA:
862 rgba_inputs[i]->set_texture_num(userdata->tex_rgba[frame.field_number]);
863 rgba_inputs[i]->set_width(width);
864 rgba_inputs[i]->set_height(height);
870 last_good_frame = frame;
874 BufferedFrame frame = theme->input_state->buffered_frames[signal_num][0];
875 CHECK(deinterlace_effect->set_int("current_field_position", frame.field_number));
881 int call_num_channels(lua_State *L)
883 lua_getglobal(L, "num_channels");
885 if (lua_pcall(L, 0, 1, 0) != 0) {
886 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
890 int num_channels = luaL_checknumber(L, 1);
892 assert(lua_gettop(L) == 0);
898 Theme::Theme(const string &filename, const vector<string> &search_dirs, ResourcePool *resource_pool, unsigned num_cards)
899 : resource_pool(resource_pool), num_cards(num_cards), signal_to_card_mapping(global_flags.default_stream_mapping)
904 register_constants();
905 register_class("EffectChain", EffectChain_funcs);
906 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
907 register_class("ImageInput", ImageInput_funcs);
908 register_class("VideoInput", VideoInput_funcs);
909 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
910 register_class("ResampleEffect", ResampleEffect_funcs);
911 register_class("PaddingEffect", PaddingEffect_funcs);
912 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
913 register_class("OverlayEffect", OverlayEffect_funcs);
914 register_class("ResizeEffect", ResizeEffect_funcs);
915 register_class("MultiplyEffect", MultiplyEffect_funcs);
916 register_class("MixEffect", MixEffect_funcs);
917 register_class("InputStateInfo", InputStateInfo_funcs);
919 // Run script. Search through all directories until we find a file that will load
920 // (as in, does not return LUA_ERRFILE); then run it. We store load errors
921 // from all the attempts, and show them once we know we can't find any of them.
923 vector<string> errors;
924 bool success = false;
925 for (size_t i = 0; i < search_dirs.size(); ++i) {
926 string path = search_dirs[i] + "/" + filename;
927 int err = luaL_loadfile(L, path.c_str());
929 // Success; actually call the code.
930 if (lua_pcall(L, 0, LUA_MULTRET, 0)) {
931 fprintf(stderr, "Error when running %s: %s\n", path.c_str(), lua_tostring(L, -1));
937 errors.push_back(lua_tostring(L, -1));
939 if (err != LUA_ERRFILE) {
940 // The file actually loaded, but failed to parse somehow. Abort; don't try the next one.
946 for (const string &error : errors) {
947 fprintf(stderr, "%s\n", error.c_str());
951 assert(lua_gettop(L) == 0);
953 // Ask it for the number of channels.
954 num_channels = call_num_channels(L);
962 void Theme::register_constants()
964 // Set Nageru.VIDEO_FORMAT_BGRA = bmusb::PixelFormat_8BitBGRA, etc.
965 const vector<pair<string, int>> constants = {
966 { "VIDEO_FORMAT_BGRA", bmusb::PixelFormat_8BitBGRA },
967 { "VIDEO_FORMAT_YCBCR", bmusb::PixelFormat_8BitYCbCrPlanar },
970 lua_newtable(L); // t = {}
972 for (const pair<string, int> &constant : constants) {
973 lua_pushstring(L, constant.first.c_str());
974 lua_pushinteger(L, constant.second);
975 lua_settable(L, 1); // t[key] = value
978 lua_setglobal(L, "Nageru"); // Nageru = t
979 assert(lua_gettop(L) == 0);
982 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
984 assert(lua_gettop(L) == 0);
985 luaL_newmetatable(L, class_name); // mt = {}
986 lua_pushlightuserdata(L, this);
987 luaL_setfuncs(L, funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
988 lua_pushvalue(L, -1);
989 lua_setfield(L, -2, "__index"); // mt.__index = mt
990 lua_setglobal(L, class_name); // ClassName = mt
991 assert(lua_gettop(L) == 0);
994 Theme::Chain Theme::get_chain(unsigned num, float t, unsigned width, unsigned height, InputState input_state)
998 unique_lock<mutex> lock(m);
999 assert(lua_gettop(L) == 0);
1000 lua_getglobal(L, "get_chain"); /* function to be called */
1001 lua_pushnumber(L, num);
1002 lua_pushnumber(L, t);
1003 lua_pushnumber(L, width);
1004 lua_pushnumber(L, height);
1005 wrap_lua_object<InputStateInfo>(L, "InputStateInfo", input_state);
1007 if (lua_pcall(L, 5, 2, 0) != 0) {
1008 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
1012 chain.chain = (EffectChain *)luaL_testudata(L, -2, "EffectChain");
1013 if (chain.chain == nullptr) {
1014 fprintf(stderr, "get_chain() for chain number %d did not return an EffectChain\n",
1018 if (!lua_isfunction(L, -1)) {
1019 fprintf(stderr, "Argument #-1 should be a function\n");
1022 lua_pushvalue(L, -1);
1023 shared_ptr<LuaRefWithDeleter> funcref(new LuaRefWithDeleter(&m, L, luaL_ref(L, LUA_REGISTRYINDEX)));
1025 assert(lua_gettop(L) == 0);
1027 chain.setup_chain = [this, funcref, input_state]{
1028 unique_lock<mutex> lock(m);
1030 this->input_state = &input_state;
1032 // Set up state, including connecting signals.
1033 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref->get());
1034 if (lua_pcall(L, 0, 0, 0) != 0) {
1035 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
1038 assert(lua_gettop(L) == 0);
1041 // TODO: Can we do better, e.g. by running setup_chain() and seeing what it references?
1042 // Actually, setup_chain does maybe hold all the references we need now anyway?
1043 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
1044 for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
1045 chain.input_frames.push_back(input_state.buffered_frames[card_index][frame_num].frame);
1052 string Theme::get_channel_name(unsigned channel)
1054 unique_lock<mutex> lock(m);
1055 lua_getglobal(L, "channel_name");
1056 lua_pushnumber(L, channel);
1057 if (lua_pcall(L, 1, 1, 0) != 0) {
1058 fprintf(stderr, "error running function `channel_name': %s\n", lua_tostring(L, -1));
1061 const char *ret = lua_tostring(L, -1);
1062 if (ret == nullptr) {
1063 fprintf(stderr, "function `channel_name' returned nil for channel %d\n", channel);
1067 string retstr = ret;
1069 assert(lua_gettop(L) == 0);
1073 int Theme::get_channel_signal(unsigned channel)
1075 unique_lock<mutex> lock(m);
1076 lua_getglobal(L, "channel_signal");
1077 lua_pushnumber(L, channel);
1078 if (lua_pcall(L, 1, 1, 0) != 0) {
1079 fprintf(stderr, "error running function `channel_signal': %s\n", lua_tostring(L, -1));
1083 int ret = luaL_checknumber(L, 1);
1085 assert(lua_gettop(L) == 0);
1089 std::string Theme::get_channel_color(unsigned channel)
1091 unique_lock<mutex> lock(m);
1092 lua_getglobal(L, "channel_color");
1093 lua_pushnumber(L, channel);
1094 if (lua_pcall(L, 1, 1, 0) != 0) {
1095 fprintf(stderr, "error running function `channel_color': %s\n", lua_tostring(L, -1));
1099 const char *ret = lua_tostring(L, -1);
1100 if (ret == nullptr) {
1101 fprintf(stderr, "function `channel_color' returned nil for channel %d\n", channel);
1105 string retstr = ret;
1107 assert(lua_gettop(L) == 0);
1111 bool Theme::get_supports_set_wb(unsigned channel)
1113 unique_lock<mutex> lock(m);
1114 lua_getglobal(L, "supports_set_wb");
1115 lua_pushnumber(L, channel);
1116 if (lua_pcall(L, 1, 1, 0) != 0) {
1117 fprintf(stderr, "error running function `supports_set_wb': %s\n", lua_tostring(L, -1));
1121 bool ret = checkbool(L, -1);
1123 assert(lua_gettop(L) == 0);
1127 void Theme::set_wb(unsigned channel, double r, double g, double b)
1129 unique_lock<mutex> lock(m);
1130 lua_getglobal(L, "set_wb");
1131 lua_pushnumber(L, channel);
1132 lua_pushnumber(L, r);
1133 lua_pushnumber(L, g);
1134 lua_pushnumber(L, b);
1135 if (lua_pcall(L, 4, 0, 0) != 0) {
1136 fprintf(stderr, "error running function `set_wb': %s\n", lua_tostring(L, -1));
1140 assert(lua_gettop(L) == 0);
1143 vector<string> Theme::get_transition_names(float t)
1145 unique_lock<mutex> lock(m);
1146 lua_getglobal(L, "get_transitions");
1147 lua_pushnumber(L, t);
1148 if (lua_pcall(L, 1, 1, 0) != 0) {
1149 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
1155 while (lua_next(L, -2) != 0) {
1156 ret.push_back(lua_tostring(L, -1));
1160 assert(lua_gettop(L) == 0);
1164 int Theme::map_signal(int signal_num)
1166 // Negative numbers map to raw signals.
1167 if (signal_num < 0) {
1168 return -1 - signal_num;
1171 unique_lock<mutex> lock(map_m);
1172 if (signal_to_card_mapping.count(signal_num)) {
1173 return signal_to_card_mapping[signal_num];
1177 if (global_flags.output_card != -1 && num_cards > 1) {
1178 // Try to exclude the output card from the default card_index.
1179 card_index = signal_num % (num_cards - 1);
1180 if (card_index >= global_flags.output_card) {
1183 if (signal_num >= int(num_cards - 1)) {
1184 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u input card(s) (card %d is busy with output).\n",
1185 signal_num, num_cards - 1, global_flags.output_card);
1186 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1189 card_index = signal_num % num_cards;
1190 if (signal_num >= int(num_cards)) {
1191 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u card(s).\n", signal_num, num_cards);
1192 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1195 signal_to_card_mapping[signal_num] = card_index;
1199 void Theme::set_signal_mapping(int signal_num, int card_num)
1201 unique_lock<mutex> lock(map_m);
1202 assert(card_num < int(num_cards));
1203 signal_to_card_mapping[signal_num] = card_num;
1206 void Theme::transition_clicked(int transition_num, float t)
1208 unique_lock<mutex> lock(m);
1209 lua_getglobal(L, "transition_clicked");
1210 lua_pushnumber(L, transition_num);
1211 lua_pushnumber(L, t);
1213 if (lua_pcall(L, 2, 0, 0) != 0) {
1214 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
1217 assert(lua_gettop(L) == 0);
1220 void Theme::channel_clicked(int preview_num)
1222 unique_lock<mutex> lock(m);
1223 lua_getglobal(L, "channel_clicked");
1224 lua_pushnumber(L, preview_num);
1226 if (lua_pcall(L, 1, 0, 0) != 0) {
1227 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
1230 assert(lua_gettop(L) == 0);