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 "cef_capture.h"
32 #include "ffmpeg_capture.h"
34 #include "image_input.h"
35 #include "input_state.h"
36 #include "pbo_frame_allocator.h"
45 using namespace movit;
47 extern Mixer *global_mixer;
51 // Contains basically the same data as InputState, but does not hold on to
52 // a reference to the frames. This is important so that we can release them
53 // without having to wait for Lua's GC.
54 struct InputStateInfo {
55 InputStateInfo(const InputState& input_state);
57 unsigned last_width[MAX_VIDEO_CARDS], last_height[MAX_VIDEO_CARDS];
58 bool last_interlaced[MAX_VIDEO_CARDS], last_has_signal[MAX_VIDEO_CARDS], last_is_connected[MAX_VIDEO_CARDS];
59 unsigned last_frame_rate_nom[MAX_VIDEO_CARDS], last_frame_rate_den[MAX_VIDEO_CARDS];
62 InputStateInfo::InputStateInfo(const InputState &input_state)
64 for (unsigned signal_num = 0; signal_num < MAX_VIDEO_CARDS; ++signal_num) {
65 BufferedFrame frame = input_state.buffered_frames[signal_num][0];
66 if (frame.frame == nullptr) {
67 last_width[signal_num] = last_height[signal_num] = 0;
68 last_interlaced[signal_num] = false;
69 last_has_signal[signal_num] = false;
70 last_is_connected[signal_num] = false;
73 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
74 last_width[signal_num] = userdata->last_width[frame.field_number];
75 last_height[signal_num] = userdata->last_height[frame.field_number];
76 last_interlaced[signal_num] = userdata->last_interlaced;
77 last_has_signal[signal_num] = userdata->last_has_signal;
78 last_is_connected[signal_num] = userdata->last_is_connected;
79 last_frame_rate_nom[signal_num] = userdata->last_frame_rate_nom;
80 last_frame_rate_den[signal_num] = userdata->last_frame_rate_den;
84 class LuaRefWithDeleter {
86 LuaRefWithDeleter(mutex *m, lua_State *L, int ref) : m(m), L(L), ref(ref) {}
87 ~LuaRefWithDeleter() {
88 unique_lock<mutex> lock(*m);
89 luaL_unref(L, LUA_REGISTRYINDEX, ref);
91 int get() const { return ref; }
94 LuaRefWithDeleter(const LuaRefWithDeleter &) = delete;
101 template<class T, class... Args>
102 int wrap_lua_object(lua_State* L, const char *class_name, Args&&... args)
104 // Construct the C++ object and put it on the stack.
105 void *mem = lua_newuserdata(L, sizeof(T));
106 new(mem) T(forward<Args>(args)...);
108 // Look up the metatable named <class_name>, and set it on the new object.
109 luaL_getmetatable(L, class_name);
110 lua_setmetatable(L, -2);
115 // Like wrap_lua_object, but the object is not owned by Lua; ie. it's not freed
116 // by Lua GC. This is typically the case for Effects, which are owned by EffectChain
117 // and expected to be destructed by it. The object will be of type T** instead of T*
118 // when exposed to Lua.
120 // Note that we currently leak if you allocate an Effect in this way and never call
121 // add_effect. We should see if there's a way to e.g. set __gc on it at construction time
122 // and then release that once add_effect() takes ownership.
123 template<class T, class... Args>
124 int wrap_lua_object_nonowned(lua_State* L, const char *class_name, Args&&... args)
126 // Construct the pointer ot the C++ object and put it on the stack.
127 T **obj = (T **)lua_newuserdata(L, sizeof(T *));
128 *obj = new T(forward<Args>(args)...);
130 // Look up the metatable named <class_name>, and set it on the new object.
131 luaL_getmetatable(L, class_name);
132 lua_setmetatable(L, -2);
137 Theme *get_theme_updata(lua_State* L)
139 luaL_checktype(L, lua_upvalueindex(1), LUA_TLIGHTUSERDATA);
140 return (Theme *)lua_touserdata(L, lua_upvalueindex(1));
143 Effect *get_effect(lua_State *L, int idx)
145 if (luaL_testudata(L, idx, "WhiteBalanceEffect") ||
146 luaL_testudata(L, idx, "ResampleEffect") ||
147 luaL_testudata(L, idx, "PaddingEffect") ||
148 luaL_testudata(L, idx, "IntegralPaddingEffect") ||
149 luaL_testudata(L, idx, "OverlayEffect") ||
150 luaL_testudata(L, idx, "ResizeEffect") ||
151 luaL_testudata(L, idx, "MultiplyEffect") ||
152 luaL_testudata(L, idx, "MixEffect") ||
153 luaL_testudata(L, idx, "ImageInput")) {
154 return *(Effect **)lua_touserdata(L, idx);
156 luaL_error(L, "Error: Index #%d was not an Effect type\n", idx);
160 InputStateInfo *get_input_state_info(lua_State *L, int idx)
162 if (luaL_testudata(L, idx, "InputStateInfo")) {
163 return (InputStateInfo *)lua_touserdata(L, idx);
165 luaL_error(L, "Error: Index #%d was not InputStateInfo\n", idx);
169 bool checkbool(lua_State* L, int idx)
171 luaL_checktype(L, idx, LUA_TBOOLEAN);
172 return lua_toboolean(L, idx);
175 string checkstdstring(lua_State *L, int index)
178 const char* cstr = lua_tolstring(L, index, &len);
179 return string(cstr, len);
182 int EffectChain_new(lua_State* L)
184 assert(lua_gettop(L) == 2);
185 Theme *theme = get_theme_updata(L);
186 int aspect_w = luaL_checknumber(L, 1);
187 int aspect_h = luaL_checknumber(L, 2);
189 return wrap_lua_object<EffectChain>(L, "EffectChain", aspect_w, aspect_h, theme->get_resource_pool());
192 int EffectChain_gc(lua_State* L)
194 assert(lua_gettop(L) == 1);
195 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
196 chain->~EffectChain();
200 int EffectChain_add_live_input(lua_State* L)
202 assert(lua_gettop(L) == 3);
203 Theme *theme = get_theme_updata(L);
204 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
205 bool override_bounce = checkbool(L, 2);
206 bool deinterlace = checkbool(L, 3);
207 bmusb::PixelFormat pixel_format = global_flags.ten_bit_input ? bmusb::PixelFormat_10BitYCbCr : bmusb::PixelFormat_8BitYCbCr;
209 // Needs to be nonowned to match add_video_input (see below).
210 return wrap_lua_object_nonowned<LiveInputWrapper>(L, "LiveInputWrapper", theme, chain, pixel_format, override_bounce, deinterlace);
213 int EffectChain_add_video_input(lua_State* L)
215 assert(lua_gettop(L) == 3);
216 Theme *theme = get_theme_updata(L);
217 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
218 FFmpegCapture **capture = (FFmpegCapture **)luaL_checkudata(L, 2, "VideoInput");
219 bool deinterlace = checkbool(L, 3);
221 // These need to be nonowned, so that the LiveInputWrapper still exists
222 // and can feed frames to the right EffectChain even if the Lua code
223 // doesn't care about the object anymore. (If we change this, we'd need
224 // to also unregister the signal connection on __gc.)
225 int ret = wrap_lua_object_nonowned<LiveInputWrapper>(
226 L, "LiveInputWrapper", theme, chain, (*capture)->get_current_pixel_format(),
227 /*override_bounce=*/false, deinterlace);
229 Theme *theme = get_theme_updata(L);
230 LiveInputWrapper **live_input = (LiveInputWrapper **)lua_touserdata(L, -1);
231 theme->register_video_signal_connection(*live_input, *capture);
236 int EffectChain_add_html_input(lua_State* L)
238 assert(lua_gettop(L) == 2);
239 Theme *theme = get_theme_updata(L);
240 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
241 CEFCapture **capture = (CEFCapture **)luaL_checkudata(L, 2, "HTMLInput");
243 // These need to be nonowned, so that the LiveInputWrapper still exists
244 // and can feed frames to the right EffectChain even if the Lua code
245 // doesn't care about the object anymore. (If we change this, we'd need
246 // to also unregister the signal connection on __gc.)
247 int ret = wrap_lua_object_nonowned<LiveInputWrapper>(
248 L, "LiveInputWrapper", theme, chain, (*capture)->get_current_pixel_format(),
249 /*override_bounce=*/false, /*deinterlace=*/false);
251 Theme *theme = get_theme_updata(L);
252 LiveInputWrapper **live_input = (LiveInputWrapper **)lua_touserdata(L, -1);
253 theme->register_html_signal_connection(*live_input, *capture);
258 int EffectChain_add_effect(lua_State* L)
260 assert(lua_gettop(L) >= 2);
261 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
263 // TODO: Better error reporting.
264 Effect *effect = get_effect(L, 2);
265 if (lua_gettop(L) == 2) {
266 if (effect->num_inputs() == 0) {
267 chain->add_input((Input *)effect);
269 chain->add_effect(effect);
272 vector<Effect *> inputs;
273 for (int idx = 3; idx <= lua_gettop(L); ++idx) {
274 if (luaL_testudata(L, idx, "LiveInputWrapper")) {
275 LiveInputWrapper **input = (LiveInputWrapper **)lua_touserdata(L, idx);
276 inputs.push_back((*input)->get_effect());
278 inputs.push_back(get_effect(L, idx));
281 chain->add_effect(effect, inputs);
284 lua_settop(L, 2); // Return the effect itself.
286 // Make sure Lua doesn't garbage-collect it away.
287 lua_pushvalue(L, -1);
288 luaL_ref(L, LUA_REGISTRYINDEX); // TODO: leak?
293 int EffectChain_finalize(lua_State* L)
295 assert(lua_gettop(L) == 2);
296 EffectChain *chain = (EffectChain *)luaL_checkudata(L, 1, "EffectChain");
297 bool is_main_chain = checkbool(L, 2);
299 // Add outputs as needed.
300 // NOTE: If you change any details about the output format, you will need to
301 // also update what's given to the muxer (HTTPD::Mux constructor) and
302 // what's put in the H.264 stream (sps_rbsp()).
303 ImageFormat inout_format;
304 inout_format.color_space = COLORSPACE_REC_709;
306 // Output gamma is tricky. We should output Rec. 709 for TV, except that
307 // we expect to run with web players and others that don't really care and
308 // just output with no conversion. So that means we'll need to output sRGB,
309 // even though H.264 has no setting for that (we use “unspecified”).
310 inout_format.gamma_curve = GAMMA_sRGB;
313 YCbCrFormat output_ycbcr_format;
314 // We actually output 4:2:0 and/or 4:2:2 in the end, but chroma subsampling
315 // happens in a pass not run by Movit (see ChromaSubsampler::subsample_chroma()).
316 output_ycbcr_format.chroma_subsampling_x = 1;
317 output_ycbcr_format.chroma_subsampling_y = 1;
319 // This will be overridden if HDMI/SDI output is in force.
320 if (global_flags.ycbcr_rec709_coefficients) {
321 output_ycbcr_format.luma_coefficients = YCBCR_REC_709;
323 output_ycbcr_format.luma_coefficients = YCBCR_REC_601;
326 output_ycbcr_format.full_range = false;
327 output_ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
329 GLenum type = global_flags.x264_bit_depth > 8 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_BYTE;
331 chain->add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, output_ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR, type);
333 // If we're using zerocopy video encoding (so the destination
334 // Y texture is owned by VA-API and will be unavailable for
335 // display), add a copy, where we'll only be using the Y component.
336 if (global_flags.use_zerocopy) {
337 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.
339 chain->set_dither_bits(global_flags.x264_bit_depth > 8 ? 16 : 8);
340 chain->set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
342 chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
349 int LiveInputWrapper_connect_signal(lua_State* L)
351 assert(lua_gettop(L) == 2);
352 LiveInputWrapper **input = (LiveInputWrapper **)luaL_checkudata(L, 1, "LiveInputWrapper");
353 int signal_num = luaL_checknumber(L, 2);
354 (*input)->connect_signal(signal_num);
358 int ImageInput_new(lua_State* L)
360 assert(lua_gettop(L) == 1);
361 string filename = checkstdstring(L, 1);
362 return wrap_lua_object_nonowned<ImageInput>(L, "ImageInput", filename);
365 int VideoInput_new(lua_State* L)
367 assert(lua_gettop(L) == 2);
368 string filename = checkstdstring(L, 1);
369 int pixel_format = luaL_checknumber(L, 2);
370 if (pixel_format != bmusb::PixelFormat_8BitYCbCrPlanar &&
371 pixel_format != bmusb::PixelFormat_8BitBGRA) {
372 fprintf(stderr, "WARNING: Invalid enum %d used for video format, choosing Y'CbCr.\n",
374 pixel_format = bmusb::PixelFormat_8BitYCbCrPlanar;
376 int ret = wrap_lua_object_nonowned<FFmpegCapture>(L, "VideoInput", filename, global_flags.width, global_flags.height);
378 FFmpegCapture **capture = (FFmpegCapture **)lua_touserdata(L, -1);
379 (*capture)->set_pixel_format(bmusb::PixelFormat(pixel_format));
381 Theme *theme = get_theme_updata(L);
382 theme->register_video_input(*capture);
387 int VideoInput_rewind(lua_State* L)
389 assert(lua_gettop(L) == 1);
390 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
391 (*video_input)->rewind();
395 int VideoInput_change_rate(lua_State* L)
397 assert(lua_gettop(L) == 2);
398 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
399 double new_rate = luaL_checknumber(L, 2);
400 (*video_input)->change_rate(new_rate);
404 int VideoInput_get_signal_num(lua_State* L)
406 assert(lua_gettop(L) == 1);
407 FFmpegCapture **video_input = (FFmpegCapture **)luaL_checkudata(L, 1, "VideoInput");
408 lua_pushnumber(L, -1 - (*video_input)->get_card_index());
412 int HTMLInput_new(lua_State* L)
414 assert(lua_gettop(L) == 1);
415 string url = checkstdstring(L, 1);
416 int ret = wrap_lua_object_nonowned<CEFCapture>(L, "HTMLInput", url, global_flags.width, global_flags.height);
418 CEFCapture **capture = (CEFCapture **)lua_touserdata(L, -1);
419 Theme *theme = get_theme_updata(L);
420 theme->register_html_input(*capture);
425 int HTMLInput_set_url(lua_State* L)
427 assert(lua_gettop(L) == 2);
428 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
429 string new_url = checkstdstring(L, 2);
430 (*video_input)->set_url(new_url);
434 int HTMLInput_reload(lua_State* L)
436 assert(lua_gettop(L) == 1);
437 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
438 (*video_input)->reload();
442 int HTMLInput_get_signal_num(lua_State* L)
444 assert(lua_gettop(L) == 1);
445 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
446 lua_pushnumber(L, -1 - (*video_input)->get_card_index());
450 int WhiteBalanceEffect_new(lua_State* L)
452 assert(lua_gettop(L) == 0);
453 return wrap_lua_object_nonowned<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
456 int ResampleEffect_new(lua_State* L)
458 assert(lua_gettop(L) == 0);
459 return wrap_lua_object_nonowned<ResampleEffect>(L, "ResampleEffect");
462 int PaddingEffect_new(lua_State* L)
464 assert(lua_gettop(L) == 0);
465 return wrap_lua_object_nonowned<PaddingEffect>(L, "PaddingEffect");
468 int IntegralPaddingEffect_new(lua_State* L)
470 assert(lua_gettop(L) == 0);
471 return wrap_lua_object_nonowned<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
474 int OverlayEffect_new(lua_State* L)
476 assert(lua_gettop(L) == 0);
477 return wrap_lua_object_nonowned<OverlayEffect>(L, "OverlayEffect");
480 int ResizeEffect_new(lua_State* L)
482 assert(lua_gettop(L) == 0);
483 return wrap_lua_object_nonowned<ResizeEffect>(L, "ResizeEffect");
486 int MultiplyEffect_new(lua_State* L)
488 assert(lua_gettop(L) == 0);
489 return wrap_lua_object_nonowned<MultiplyEffect>(L, "MultiplyEffect");
492 int MixEffect_new(lua_State* L)
494 assert(lua_gettop(L) == 0);
495 return wrap_lua_object_nonowned<MixEffect>(L, "MixEffect");
498 int InputStateInfo_get_width(lua_State* L)
500 assert(lua_gettop(L) == 2);
501 InputStateInfo *input_state_info = get_input_state_info(L, 1);
502 Theme *theme = get_theme_updata(L);
503 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
504 lua_pushnumber(L, input_state_info->last_width[signal_num]);
508 int InputStateInfo_get_height(lua_State* L)
510 assert(lua_gettop(L) == 2);
511 InputStateInfo *input_state_info = get_input_state_info(L, 1);
512 Theme *theme = get_theme_updata(L);
513 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
514 lua_pushnumber(L, input_state_info->last_height[signal_num]);
518 int InputStateInfo_get_interlaced(lua_State* L)
520 assert(lua_gettop(L) == 2);
521 InputStateInfo *input_state_info = get_input_state_info(L, 1);
522 Theme *theme = get_theme_updata(L);
523 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
524 lua_pushboolean(L, input_state_info->last_interlaced[signal_num]);
528 int InputStateInfo_get_has_signal(lua_State* L)
530 assert(lua_gettop(L) == 2);
531 InputStateInfo *input_state_info = get_input_state_info(L, 1);
532 Theme *theme = get_theme_updata(L);
533 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
534 lua_pushboolean(L, input_state_info->last_has_signal[signal_num]);
538 int InputStateInfo_get_is_connected(lua_State* L)
540 assert(lua_gettop(L) == 2);
541 InputStateInfo *input_state_info = get_input_state_info(L, 1);
542 Theme *theme = get_theme_updata(L);
543 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
544 lua_pushboolean(L, input_state_info->last_is_connected[signal_num]);
548 int InputStateInfo_get_frame_rate_nom(lua_State* L)
550 assert(lua_gettop(L) == 2);
551 InputStateInfo *input_state_info = get_input_state_info(L, 1);
552 Theme *theme = get_theme_updata(L);
553 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
554 lua_pushnumber(L, input_state_info->last_frame_rate_nom[signal_num]);
558 int InputStateInfo_get_frame_rate_den(lua_State* L)
560 assert(lua_gettop(L) == 2);
561 InputStateInfo *input_state_info = get_input_state_info(L, 1);
562 Theme *theme = get_theme_updata(L);
563 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
564 lua_pushnumber(L, input_state_info->last_frame_rate_den[signal_num]);
568 int Effect_set_float(lua_State *L)
570 assert(lua_gettop(L) == 3);
571 Effect *effect = (Effect *)get_effect(L, 1);
572 string key = checkstdstring(L, 2);
573 float value = luaL_checknumber(L, 3);
574 if (!effect->set_float(key, value)) {
575 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
580 int Effect_set_int(lua_State *L)
582 assert(lua_gettop(L) == 3);
583 Effect *effect = (Effect *)get_effect(L, 1);
584 string key = checkstdstring(L, 2);
585 float value = luaL_checknumber(L, 3);
586 if (!effect->set_int(key, value)) {
587 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
592 int Effect_set_vec3(lua_State *L)
594 assert(lua_gettop(L) == 5);
595 Effect *effect = (Effect *)get_effect(L, 1);
596 string key = checkstdstring(L, 2);
598 v[0] = luaL_checknumber(L, 3);
599 v[1] = luaL_checknumber(L, 4);
600 v[2] = luaL_checknumber(L, 5);
601 if (!effect->set_vec3(key, v)) {
602 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", key.c_str(),
608 int Effect_set_vec4(lua_State *L)
610 assert(lua_gettop(L) == 6);
611 Effect *effect = (Effect *)get_effect(L, 1);
612 string key = checkstdstring(L, 2);
614 v[0] = luaL_checknumber(L, 3);
615 v[1] = luaL_checknumber(L, 4);
616 v[2] = luaL_checknumber(L, 5);
617 v[3] = luaL_checknumber(L, 6);
618 if (!effect->set_vec4(key, v)) {
619 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", key.c_str(),
620 v[0], v[1], v[2], v[3]);
625 const luaL_Reg EffectChain_funcs[] = {
626 { "new", EffectChain_new },
627 { "__gc", EffectChain_gc },
628 { "add_live_input", EffectChain_add_live_input },
629 { "add_video_input", EffectChain_add_video_input },
630 { "add_html_input", EffectChain_add_html_input },
631 { "add_effect", EffectChain_add_effect },
632 { "finalize", EffectChain_finalize },
636 const luaL_Reg LiveInputWrapper_funcs[] = {
637 { "connect_signal", LiveInputWrapper_connect_signal },
641 const luaL_Reg ImageInput_funcs[] = {
642 { "new", ImageInput_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 VideoInput_funcs[] = {
651 { "new", VideoInput_new },
652 { "rewind", VideoInput_rewind },
653 { "change_rate", VideoInput_change_rate },
654 { "get_signal_num", VideoInput_get_signal_num },
658 const luaL_Reg HTMLInput_funcs[] = {
659 // TODO: execute_javascript, perhaps set_max_fps?
660 { "new", HTMLInput_new },
661 { "set_url", HTMLInput_set_url },
662 { "reload", HTMLInput_reload },
663 { "get_signal_num", HTMLInput_get_signal_num },
667 const luaL_Reg WhiteBalanceEffect_funcs[] = {
668 { "new", WhiteBalanceEffect_new },
669 { "set_float", Effect_set_float },
670 { "set_int", Effect_set_int },
671 { "set_vec3", Effect_set_vec3 },
672 { "set_vec4", Effect_set_vec4 },
676 const luaL_Reg ResampleEffect_funcs[] = {
677 { "new", ResampleEffect_new },
678 { "set_float", Effect_set_float },
679 { "set_int", Effect_set_int },
680 { "set_vec3", Effect_set_vec3 },
681 { "set_vec4", Effect_set_vec4 },
685 const luaL_Reg PaddingEffect_funcs[] = {
686 { "new", PaddingEffect_new },
687 { "set_float", Effect_set_float },
688 { "set_int", Effect_set_int },
689 { "set_vec3", Effect_set_vec3 },
690 { "set_vec4", Effect_set_vec4 },
694 const luaL_Reg IntegralPaddingEffect_funcs[] = {
695 { "new", IntegralPaddingEffect_new },
696 { "set_float", Effect_set_float },
697 { "set_int", Effect_set_int },
698 { "set_vec3", Effect_set_vec3 },
699 { "set_vec4", Effect_set_vec4 },
703 const luaL_Reg OverlayEffect_funcs[] = {
704 { "new", OverlayEffect_new },
705 { "set_float", Effect_set_float },
706 { "set_int", Effect_set_int },
707 { "set_vec3", Effect_set_vec3 },
708 { "set_vec4", Effect_set_vec4 },
712 const luaL_Reg ResizeEffect_funcs[] = {
713 { "new", ResizeEffect_new },
714 { "set_float", Effect_set_float },
715 { "set_int", Effect_set_int },
716 { "set_vec3", Effect_set_vec3 },
717 { "set_vec4", Effect_set_vec4 },
721 const luaL_Reg MultiplyEffect_funcs[] = {
722 { "new", MultiplyEffect_new },
723 { "set_float", Effect_set_float },
724 { "set_int", Effect_set_int },
725 { "set_vec3", Effect_set_vec3 },
726 { "set_vec4", Effect_set_vec4 },
730 const luaL_Reg MixEffect_funcs[] = {
731 { "new", MixEffect_new },
732 { "set_float", Effect_set_float },
733 { "set_int", Effect_set_int },
734 { "set_vec3", Effect_set_vec3 },
735 { "set_vec4", Effect_set_vec4 },
739 const luaL_Reg InputStateInfo_funcs[] = {
740 { "get_width", InputStateInfo_get_width },
741 { "get_height", InputStateInfo_get_height },
742 { "get_interlaced", InputStateInfo_get_interlaced },
743 { "get_has_signal", InputStateInfo_get_has_signal },
744 { "get_is_connected", InputStateInfo_get_is_connected },
745 { "get_frame_rate_nom", InputStateInfo_get_frame_rate_nom },
746 { "get_frame_rate_den", InputStateInfo_get_frame_rate_den },
752 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain, bmusb::PixelFormat pixel_format, bool override_bounce, bool deinterlace)
754 pixel_format(pixel_format),
755 deinterlace(deinterlace)
757 ImageFormat inout_format;
758 inout_format.color_space = COLORSPACE_sRGB;
760 // Gamma curve depends on the input signal, and we don't really get any
761 // indications. A camera would be expected to do Rec. 709, but
762 // I haven't checked if any do in practice. However, computers _do_ output
763 // in sRGB gamma (ie., they don't convert from sRGB to Rec. 709), and
764 // I wouldn't really be surprised if most non-professional cameras do, too.
765 // So we pick sRGB as the least evil here.
766 inout_format.gamma_curve = GAMMA_sRGB;
770 deinterlace_effect = new movit::DeinterlaceEffect();
772 // As per the comments in deinterlace_effect.h, we turn this off.
773 // The most likely interlaced input for us is either a camera
774 // (where it's fine to turn it off) or a laptop (where it _should_
776 CHECK(deinterlace_effect->set_int("enable_spatial_interlacing_check", 0));
778 num_inputs = deinterlace_effect->num_inputs();
779 assert(num_inputs == FRAME_HISTORY_LENGTH);
784 if (pixel_format == bmusb::PixelFormat_8BitBGRA) {
785 for (unsigned i = 0; i < num_inputs; ++i) {
786 // We upload our textures ourselves, and Movit swaps
787 // R and B in the shader if we specify BGRA, so lie and say RGBA.
788 if (global_flags.can_disable_srgb_decoder) {
789 rgba_inputs.push_back(new sRGBSwitchingFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
791 rgba_inputs.push_back(new NonsRGBCapableFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
793 chain->add_input(rgba_inputs.back());
797 vector<Effect *> reverse_inputs(rgba_inputs.rbegin(), rgba_inputs.rend());
798 chain->add_effect(deinterlace_effect, reverse_inputs);
801 assert(pixel_format == bmusb::PixelFormat_8BitYCbCr ||
802 pixel_format == bmusb::PixelFormat_10BitYCbCr ||
803 pixel_format == bmusb::PixelFormat_8BitYCbCrPlanar);
805 // Most of these settings will be overridden later if using PixelFormat_8BitYCbCrPlanar.
806 input_ycbcr_format.chroma_subsampling_x = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1 : 2;
807 input_ycbcr_format.chroma_subsampling_y = 1;
808 input_ycbcr_format.num_levels = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1024 : 256;
809 input_ycbcr_format.cb_x_position = 0.0;
810 input_ycbcr_format.cr_x_position = 0.0;
811 input_ycbcr_format.cb_y_position = 0.5;
812 input_ycbcr_format.cr_y_position = 0.5;
813 input_ycbcr_format.luma_coefficients = YCBCR_REC_709; // Will be overridden later even if not planar.
814 input_ycbcr_format.full_range = false; // Will be overridden later even if not planar.
816 for (unsigned i = 0; i < num_inputs; ++i) {
817 // When using 10-bit input, we're converting to interleaved through v210Converter.
818 YCbCrInputSplitting splitting;
819 if (pixel_format == bmusb::PixelFormat_10BitYCbCr) {
820 splitting = YCBCR_INPUT_INTERLEAVED;
821 } else if (pixel_format == bmusb::PixelFormat_8BitYCbCr) {
822 splitting = YCBCR_INPUT_SPLIT_Y_AND_CBCR;
824 splitting = YCBCR_INPUT_PLANAR;
826 if (override_bounce) {
827 ycbcr_inputs.push_back(new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
829 ycbcr_inputs.push_back(new YCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
831 chain->add_input(ycbcr_inputs.back());
835 vector<Effect *> reverse_inputs(ycbcr_inputs.rbegin(), ycbcr_inputs.rend());
836 chain->add_effect(deinterlace_effect, reverse_inputs);
841 void LiveInputWrapper::connect_signal(int signal_num)
843 if (global_mixer == nullptr) {
848 signal_num = theme->map_signal(signal_num);
849 connect_signal_raw(signal_num, *theme->input_state);
852 void LiveInputWrapper::connect_signal_raw(int signal_num, const InputState &input_state)
854 BufferedFrame first_frame = input_state.buffered_frames[signal_num][0];
855 if (first_frame.frame == nullptr) {
859 unsigned width, height;
861 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)first_frame.frame->userdata;
862 width = userdata->last_width[first_frame.field_number];
863 height = userdata->last_height[first_frame.field_number];
866 movit::YCbCrLumaCoefficients ycbcr_coefficients = input_state.ycbcr_coefficients[signal_num];
867 bool full_range = input_state.full_range[signal_num];
869 if (input_state.ycbcr_coefficients_auto[signal_num]) {
872 // The Blackmagic driver docs claim that the device outputs Y'CbCr
873 // according to Rec. 601, but this seems to indicate the subsampling
874 // positions only, as they publish Y'CbCr → RGB formulas that are
875 // different for HD and SD (corresponding to Rec. 709 and 601, respectively),
876 // and a Lenovo X1 gen 3 I used to test definitely outputs Rec. 709
877 // (at least up to rounding error). Other devices seem to use Rec. 601
878 // even on HD resolutions. Nevertheless, Rec. 709 _is_ the right choice
879 // for HD, so we default to that if the user hasn't set anything.
881 ycbcr_coefficients = YCBCR_REC_709;
883 ycbcr_coefficients = YCBCR_REC_601;
887 // This is a global, but it doesn't really matter.
888 input_ycbcr_format.luma_coefficients = ycbcr_coefficients;
889 input_ycbcr_format.full_range = full_range;
891 BufferedFrame last_good_frame = first_frame;
892 for (unsigned i = 0; i < max(ycbcr_inputs.size(), rgba_inputs.size()); ++i) {
893 BufferedFrame frame = input_state.buffered_frames[signal_num][i];
894 if (frame.frame == nullptr) {
895 // Not enough data; reuse last frame (well, field).
896 // This is suboptimal, but we have nothing better.
897 frame = last_good_frame;
899 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
901 unsigned this_width = userdata->last_width[frame.field_number];
902 unsigned this_height = userdata->last_height[frame.field_number];
903 if (this_width != width || this_height != height) {
904 // Resolution changed; reuse last frame/field.
905 frame = last_good_frame;
906 userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
909 assert(userdata->pixel_format == pixel_format);
910 switch (pixel_format) {
911 case bmusb::PixelFormat_8BitYCbCr:
912 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
913 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cbcr[frame.field_number]);
914 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
915 ycbcr_inputs[i]->set_width(width);
916 ycbcr_inputs[i]->set_height(height);
918 case bmusb::PixelFormat_8BitYCbCrPlanar:
919 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
920 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cb[frame.field_number]);
921 ycbcr_inputs[i]->set_texture_num(2, userdata->tex_cr[frame.field_number]);
922 ycbcr_inputs[i]->change_ycbcr_format(userdata->ycbcr_format);
923 ycbcr_inputs[i]->set_width(width);
924 ycbcr_inputs[i]->set_height(height);
926 case bmusb::PixelFormat_10BitYCbCr:
927 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_444[frame.field_number]);
928 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
929 ycbcr_inputs[i]->set_width(width);
930 ycbcr_inputs[i]->set_height(height);
932 case bmusb::PixelFormat_8BitBGRA:
933 rgba_inputs[i]->set_texture_num(userdata->tex_rgba[frame.field_number]);
934 rgba_inputs[i]->set_width(width);
935 rgba_inputs[i]->set_height(height);
941 last_good_frame = frame;
945 BufferedFrame frame = input_state.buffered_frames[signal_num][0];
946 CHECK(deinterlace_effect->set_int("current_field_position", frame.field_number));
952 int call_num_channels(lua_State *L)
954 lua_getglobal(L, "num_channels");
956 if (lua_pcall(L, 0, 1, 0) != 0) {
957 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
961 int num_channels = luaL_checknumber(L, 1);
963 assert(lua_gettop(L) == 0);
969 Theme::Theme(const string &filename, const vector<string> &search_dirs, ResourcePool *resource_pool, unsigned num_cards)
970 : resource_pool(resource_pool), num_cards(num_cards), signal_to_card_mapping(global_flags.default_stream_mapping)
975 register_constants();
976 register_class("EffectChain", EffectChain_funcs);
977 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
978 register_class("ImageInput", ImageInput_funcs);
979 register_class("VideoInput", VideoInput_funcs);
980 register_class("HTMLInput", HTMLInput_funcs);
981 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
982 register_class("ResampleEffect", ResampleEffect_funcs);
983 register_class("PaddingEffect", PaddingEffect_funcs);
984 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
985 register_class("OverlayEffect", OverlayEffect_funcs);
986 register_class("ResizeEffect", ResizeEffect_funcs);
987 register_class("MultiplyEffect", MultiplyEffect_funcs);
988 register_class("MixEffect", MixEffect_funcs);
989 register_class("InputStateInfo", InputStateInfo_funcs);
991 // Run script. Search through all directories until we find a file that will load
992 // (as in, does not return LUA_ERRFILE); then run it. We store load errors
993 // from all the attempts, and show them once we know we can't find any of them.
995 vector<string> errors;
996 bool success = false;
997 for (size_t i = 0; i < search_dirs.size(); ++i) {
998 string path = search_dirs[i] + "/" + filename;
999 int err = luaL_loadfile(L, path.c_str());
1001 // Success; actually call the code.
1002 if (lua_pcall(L, 0, LUA_MULTRET, 0)) {
1003 fprintf(stderr, "Error when running %s: %s\n", path.c_str(), lua_tostring(L, -1));
1009 errors.push_back(lua_tostring(L, -1));
1011 if (err != LUA_ERRFILE) {
1012 // The file actually loaded, but failed to parse somehow. Abort; don't try the next one.
1018 for (const string &error : errors) {
1019 fprintf(stderr, "%s\n", error.c_str());
1023 assert(lua_gettop(L) == 0);
1025 // Ask it for the number of channels.
1026 num_channels = call_num_channels(L);
1034 void Theme::register_constants()
1036 // Set Nageru.VIDEO_FORMAT_BGRA = bmusb::PixelFormat_8BitBGRA, etc.
1037 const vector<pair<string, int>> constants = {
1038 { "VIDEO_FORMAT_BGRA", bmusb::PixelFormat_8BitBGRA },
1039 { "VIDEO_FORMAT_YCBCR", bmusb::PixelFormat_8BitYCbCrPlanar },
1042 lua_newtable(L); // t = {}
1044 for (const pair<string, int> &constant : constants) {
1045 lua_pushstring(L, constant.first.c_str());
1046 lua_pushinteger(L, constant.second);
1047 lua_settable(L, 1); // t[key] = value
1050 lua_setglobal(L, "Nageru"); // Nageru = t
1051 assert(lua_gettop(L) == 0);
1054 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
1056 assert(lua_gettop(L) == 0);
1057 luaL_newmetatable(L, class_name); // mt = {}
1058 lua_pushlightuserdata(L, this);
1059 luaL_setfuncs(L, funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
1060 lua_pushvalue(L, -1);
1061 lua_setfield(L, -2, "__index"); // mt.__index = mt
1062 lua_setglobal(L, class_name); // ClassName = mt
1063 assert(lua_gettop(L) == 0);
1066 Theme::Chain Theme::get_chain(unsigned num, float t, unsigned width, unsigned height, InputState input_state)
1070 unique_lock<mutex> lock(m);
1071 assert(lua_gettop(L) == 0);
1072 lua_getglobal(L, "get_chain"); /* function to be called */
1073 lua_pushnumber(L, num);
1074 lua_pushnumber(L, t);
1075 lua_pushnumber(L, width);
1076 lua_pushnumber(L, height);
1077 wrap_lua_object<InputStateInfo>(L, "InputStateInfo", input_state);
1079 if (lua_pcall(L, 5, 2, 0) != 0) {
1080 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
1084 chain.chain = (EffectChain *)luaL_testudata(L, -2, "EffectChain");
1085 if (chain.chain == nullptr) {
1086 fprintf(stderr, "get_chain() for chain number %d did not return an EffectChain\n",
1090 if (!lua_isfunction(L, -1)) {
1091 fprintf(stderr, "Argument #-1 should be a function\n");
1094 lua_pushvalue(L, -1);
1095 shared_ptr<LuaRefWithDeleter> funcref(new LuaRefWithDeleter(&m, L, luaL_ref(L, LUA_REGISTRYINDEX)));
1097 assert(lua_gettop(L) == 0);
1099 chain.setup_chain = [this, funcref, input_state]{
1100 unique_lock<mutex> lock(m);
1102 assert(this->input_state == nullptr);
1103 this->input_state = &input_state;
1105 // Set up state, including connecting signals.
1106 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref->get());
1107 if (lua_pcall(L, 0, 0, 0) != 0) {
1108 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
1111 assert(lua_gettop(L) == 0);
1113 this->input_state = nullptr;
1116 // TODO: Can we do better, e.g. by running setup_chain() and seeing what it references?
1117 // Actually, setup_chain does maybe hold all the references we need now anyway?
1118 chain.input_frames.reserve(num_cards * FRAME_HISTORY_LENGTH);
1119 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
1120 for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
1121 chain.input_frames.push_back(input_state.buffered_frames[card_index][frame_num].frame);
1128 string Theme::get_channel_name(unsigned channel)
1130 unique_lock<mutex> lock(m);
1131 lua_getglobal(L, "channel_name");
1132 lua_pushnumber(L, channel);
1133 if (lua_pcall(L, 1, 1, 0) != 0) {
1134 fprintf(stderr, "error running function `channel_name': %s\n", lua_tostring(L, -1));
1137 const char *ret = lua_tostring(L, -1);
1138 if (ret == nullptr) {
1139 fprintf(stderr, "function `channel_name' returned nil for channel %d\n", channel);
1143 string retstr = ret;
1145 assert(lua_gettop(L) == 0);
1149 int Theme::get_channel_signal(unsigned channel)
1151 unique_lock<mutex> lock(m);
1152 lua_getglobal(L, "channel_signal");
1153 lua_pushnumber(L, channel);
1154 if (lua_pcall(L, 1, 1, 0) != 0) {
1155 fprintf(stderr, "error running function `channel_signal': %s\n", lua_tostring(L, -1));
1159 int ret = luaL_checknumber(L, 1);
1161 assert(lua_gettop(L) == 0);
1165 std::string Theme::get_channel_color(unsigned channel)
1167 unique_lock<mutex> lock(m);
1168 lua_getglobal(L, "channel_color");
1169 lua_pushnumber(L, channel);
1170 if (lua_pcall(L, 1, 1, 0) != 0) {
1171 fprintf(stderr, "error running function `channel_color': %s\n", lua_tostring(L, -1));
1175 const char *ret = lua_tostring(L, -1);
1176 if (ret == nullptr) {
1177 fprintf(stderr, "function `channel_color' returned nil for channel %d\n", channel);
1181 string retstr = ret;
1183 assert(lua_gettop(L) == 0);
1187 bool Theme::get_supports_set_wb(unsigned channel)
1189 unique_lock<mutex> lock(m);
1190 lua_getglobal(L, "supports_set_wb");
1191 lua_pushnumber(L, channel);
1192 if (lua_pcall(L, 1, 1, 0) != 0) {
1193 fprintf(stderr, "error running function `supports_set_wb': %s\n", lua_tostring(L, -1));
1197 bool ret = checkbool(L, -1);
1199 assert(lua_gettop(L) == 0);
1203 void Theme::set_wb(unsigned channel, double r, double g, double b)
1205 unique_lock<mutex> lock(m);
1206 lua_getglobal(L, "set_wb");
1207 lua_pushnumber(L, channel);
1208 lua_pushnumber(L, r);
1209 lua_pushnumber(L, g);
1210 lua_pushnumber(L, b);
1211 if (lua_pcall(L, 4, 0, 0) != 0) {
1212 fprintf(stderr, "error running function `set_wb': %s\n", lua_tostring(L, -1));
1216 assert(lua_gettop(L) == 0);
1219 vector<string> Theme::get_transition_names(float t)
1221 unique_lock<mutex> lock(m);
1222 lua_getglobal(L, "get_transitions");
1223 lua_pushnumber(L, t);
1224 if (lua_pcall(L, 1, 1, 0) != 0) {
1225 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
1231 while (lua_next(L, -2) != 0) {
1232 ret.push_back(lua_tostring(L, -1));
1236 assert(lua_gettop(L) == 0);
1240 int Theme::map_signal(int signal_num)
1242 // Negative numbers map to raw signals.
1243 if (signal_num < 0) {
1244 return -1 - signal_num;
1247 unique_lock<mutex> lock(map_m);
1248 if (signal_to_card_mapping.count(signal_num)) {
1249 return signal_to_card_mapping[signal_num];
1253 if (global_flags.output_card != -1 && num_cards > 1) {
1254 // Try to exclude the output card from the default card_index.
1255 card_index = signal_num % (num_cards - 1);
1256 if (card_index >= global_flags.output_card) {
1259 if (signal_num >= int(num_cards - 1)) {
1260 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u input card(s) (card %d is busy with output).\n",
1261 signal_num, num_cards - 1, global_flags.output_card);
1262 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1265 card_index = signal_num % num_cards;
1266 if (signal_num >= int(num_cards)) {
1267 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u card(s).\n", signal_num, num_cards);
1268 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1271 signal_to_card_mapping[signal_num] = card_index;
1275 void Theme::set_signal_mapping(int signal_num, int card_num)
1277 unique_lock<mutex> lock(map_m);
1278 assert(card_num < int(num_cards));
1279 signal_to_card_mapping[signal_num] = card_num;
1282 void Theme::transition_clicked(int transition_num, float t)
1284 unique_lock<mutex> lock(m);
1285 lua_getglobal(L, "transition_clicked");
1286 lua_pushnumber(L, transition_num);
1287 lua_pushnumber(L, t);
1289 if (lua_pcall(L, 2, 0, 0) != 0) {
1290 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
1293 assert(lua_gettop(L) == 0);
1296 void Theme::channel_clicked(int preview_num)
1298 unique_lock<mutex> lock(m);
1299 lua_getglobal(L, "channel_clicked");
1300 lua_pushnumber(L, preview_num);
1302 if (lua_pcall(L, 1, 0, 0) != 0) {
1303 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
1306 assert(lua_gettop(L) == 0);