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_get_signal_num(lua_State* L)
427 assert(lua_gettop(L) == 1);
428 CEFCapture **video_input = (CEFCapture **)luaL_checkudata(L, 1, "HTMLInput");
429 lua_pushnumber(L, -1 - (*video_input)->get_card_index());
433 int WhiteBalanceEffect_new(lua_State* L)
435 assert(lua_gettop(L) == 0);
436 return wrap_lua_object_nonowned<WhiteBalanceEffect>(L, "WhiteBalanceEffect");
439 int ResampleEffect_new(lua_State* L)
441 assert(lua_gettop(L) == 0);
442 return wrap_lua_object_nonowned<ResampleEffect>(L, "ResampleEffect");
445 int PaddingEffect_new(lua_State* L)
447 assert(lua_gettop(L) == 0);
448 return wrap_lua_object_nonowned<PaddingEffect>(L, "PaddingEffect");
451 int IntegralPaddingEffect_new(lua_State* L)
453 assert(lua_gettop(L) == 0);
454 return wrap_lua_object_nonowned<IntegralPaddingEffect>(L, "IntegralPaddingEffect");
457 int OverlayEffect_new(lua_State* L)
459 assert(lua_gettop(L) == 0);
460 return wrap_lua_object_nonowned<OverlayEffect>(L, "OverlayEffect");
463 int ResizeEffect_new(lua_State* L)
465 assert(lua_gettop(L) == 0);
466 return wrap_lua_object_nonowned<ResizeEffect>(L, "ResizeEffect");
469 int MultiplyEffect_new(lua_State* L)
471 assert(lua_gettop(L) == 0);
472 return wrap_lua_object_nonowned<MultiplyEffect>(L, "MultiplyEffect");
475 int MixEffect_new(lua_State* L)
477 assert(lua_gettop(L) == 0);
478 return wrap_lua_object_nonowned<MixEffect>(L, "MixEffect");
481 int InputStateInfo_get_width(lua_State* L)
483 assert(lua_gettop(L) == 2);
484 InputStateInfo *input_state_info = get_input_state_info(L, 1);
485 Theme *theme = get_theme_updata(L);
486 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
487 lua_pushnumber(L, input_state_info->last_width[signal_num]);
491 int InputStateInfo_get_height(lua_State* L)
493 assert(lua_gettop(L) == 2);
494 InputStateInfo *input_state_info = get_input_state_info(L, 1);
495 Theme *theme = get_theme_updata(L);
496 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
497 lua_pushnumber(L, input_state_info->last_height[signal_num]);
501 int InputStateInfo_get_interlaced(lua_State* L)
503 assert(lua_gettop(L) == 2);
504 InputStateInfo *input_state_info = get_input_state_info(L, 1);
505 Theme *theme = get_theme_updata(L);
506 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
507 lua_pushboolean(L, input_state_info->last_interlaced[signal_num]);
511 int InputStateInfo_get_has_signal(lua_State* L)
513 assert(lua_gettop(L) == 2);
514 InputStateInfo *input_state_info = get_input_state_info(L, 1);
515 Theme *theme = get_theme_updata(L);
516 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
517 lua_pushboolean(L, input_state_info->last_has_signal[signal_num]);
521 int InputStateInfo_get_is_connected(lua_State* L)
523 assert(lua_gettop(L) == 2);
524 InputStateInfo *input_state_info = get_input_state_info(L, 1);
525 Theme *theme = get_theme_updata(L);
526 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
527 lua_pushboolean(L, input_state_info->last_is_connected[signal_num]);
531 int InputStateInfo_get_frame_rate_nom(lua_State* L)
533 assert(lua_gettop(L) == 2);
534 InputStateInfo *input_state_info = get_input_state_info(L, 1);
535 Theme *theme = get_theme_updata(L);
536 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
537 lua_pushnumber(L, input_state_info->last_frame_rate_nom[signal_num]);
541 int InputStateInfo_get_frame_rate_den(lua_State* L)
543 assert(lua_gettop(L) == 2);
544 InputStateInfo *input_state_info = get_input_state_info(L, 1);
545 Theme *theme = get_theme_updata(L);
546 int signal_num = theme->map_signal(luaL_checknumber(L, 2));
547 lua_pushnumber(L, input_state_info->last_frame_rate_den[signal_num]);
551 int Effect_set_float(lua_State *L)
553 assert(lua_gettop(L) == 3);
554 Effect *effect = (Effect *)get_effect(L, 1);
555 string key = checkstdstring(L, 2);
556 float value = luaL_checknumber(L, 3);
557 if (!effect->set_float(key, value)) {
558 luaL_error(L, "Effect refused set_float(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
563 int Effect_set_int(lua_State *L)
565 assert(lua_gettop(L) == 3);
566 Effect *effect = (Effect *)get_effect(L, 1);
567 string key = checkstdstring(L, 2);
568 float value = luaL_checknumber(L, 3);
569 if (!effect->set_int(key, value)) {
570 luaL_error(L, "Effect refused set_int(\"%s\", %d) (invalid key?)", key.c_str(), int(value));
575 int Effect_set_vec3(lua_State *L)
577 assert(lua_gettop(L) == 5);
578 Effect *effect = (Effect *)get_effect(L, 1);
579 string key = checkstdstring(L, 2);
581 v[0] = luaL_checknumber(L, 3);
582 v[1] = luaL_checknumber(L, 4);
583 v[2] = luaL_checknumber(L, 5);
584 if (!effect->set_vec3(key, v)) {
585 luaL_error(L, "Effect refused set_vec3(\"%s\", %f, %f, %f) (invalid key?)", key.c_str(),
591 int Effect_set_vec4(lua_State *L)
593 assert(lua_gettop(L) == 6);
594 Effect *effect = (Effect *)get_effect(L, 1);
595 string key = checkstdstring(L, 2);
597 v[0] = luaL_checknumber(L, 3);
598 v[1] = luaL_checknumber(L, 4);
599 v[2] = luaL_checknumber(L, 5);
600 v[3] = luaL_checknumber(L, 6);
601 if (!effect->set_vec4(key, v)) {
602 luaL_error(L, "Effect refused set_vec4(\"%s\", %f, %f, %f, %f) (invalid key?)", key.c_str(),
603 v[0], v[1], v[2], v[3]);
608 const luaL_Reg EffectChain_funcs[] = {
609 { "new", EffectChain_new },
610 { "__gc", EffectChain_gc },
611 { "add_live_input", EffectChain_add_live_input },
612 { "add_video_input", EffectChain_add_video_input },
613 { "add_html_input", EffectChain_add_html_input },
614 { "add_effect", EffectChain_add_effect },
615 { "finalize", EffectChain_finalize },
619 const luaL_Reg LiveInputWrapper_funcs[] = {
620 { "connect_signal", LiveInputWrapper_connect_signal },
624 const luaL_Reg ImageInput_funcs[] = {
625 { "new", ImageInput_new },
626 { "set_float", Effect_set_float },
627 { "set_int", Effect_set_int },
628 { "set_vec3", Effect_set_vec3 },
629 { "set_vec4", Effect_set_vec4 },
633 const luaL_Reg VideoInput_funcs[] = {
634 { "new", VideoInput_new },
635 { "rewind", VideoInput_rewind },
636 { "change_rate", VideoInput_change_rate },
637 { "get_signal_num", VideoInput_get_signal_num },
641 const luaL_Reg HTMLInput_funcs[] = {
642 // TODO: reload, set_url, execute_javascript, perhaps change_framerate?
643 { "new", HTMLInput_new },
644 { "get_signal_num", HTMLInput_get_signal_num },
648 const luaL_Reg WhiteBalanceEffect_funcs[] = {
649 { "new", WhiteBalanceEffect_new },
650 { "set_float", Effect_set_float },
651 { "set_int", Effect_set_int },
652 { "set_vec3", Effect_set_vec3 },
653 { "set_vec4", Effect_set_vec4 },
657 const luaL_Reg ResampleEffect_funcs[] = {
658 { "new", ResampleEffect_new },
659 { "set_float", Effect_set_float },
660 { "set_int", Effect_set_int },
661 { "set_vec3", Effect_set_vec3 },
662 { "set_vec4", Effect_set_vec4 },
666 const luaL_Reg PaddingEffect_funcs[] = {
667 { "new", PaddingEffect_new },
668 { "set_float", Effect_set_float },
669 { "set_int", Effect_set_int },
670 { "set_vec3", Effect_set_vec3 },
671 { "set_vec4", Effect_set_vec4 },
675 const luaL_Reg IntegralPaddingEffect_funcs[] = {
676 { "new", IntegralPaddingEffect_new },
677 { "set_float", Effect_set_float },
678 { "set_int", Effect_set_int },
679 { "set_vec3", Effect_set_vec3 },
680 { "set_vec4", Effect_set_vec4 },
684 const luaL_Reg OverlayEffect_funcs[] = {
685 { "new", OverlayEffect_new },
686 { "set_float", Effect_set_float },
687 { "set_int", Effect_set_int },
688 { "set_vec3", Effect_set_vec3 },
689 { "set_vec4", Effect_set_vec4 },
693 const luaL_Reg ResizeEffect_funcs[] = {
694 { "new", ResizeEffect_new },
695 { "set_float", Effect_set_float },
696 { "set_int", Effect_set_int },
697 { "set_vec3", Effect_set_vec3 },
698 { "set_vec4", Effect_set_vec4 },
702 const luaL_Reg MultiplyEffect_funcs[] = {
703 { "new", MultiplyEffect_new },
704 { "set_float", Effect_set_float },
705 { "set_int", Effect_set_int },
706 { "set_vec3", Effect_set_vec3 },
707 { "set_vec4", Effect_set_vec4 },
711 const luaL_Reg MixEffect_funcs[] = {
712 { "new", MixEffect_new },
713 { "set_float", Effect_set_float },
714 { "set_int", Effect_set_int },
715 { "set_vec3", Effect_set_vec3 },
716 { "set_vec4", Effect_set_vec4 },
720 const luaL_Reg InputStateInfo_funcs[] = {
721 { "get_width", InputStateInfo_get_width },
722 { "get_height", InputStateInfo_get_height },
723 { "get_interlaced", InputStateInfo_get_interlaced },
724 { "get_has_signal", InputStateInfo_get_has_signal },
725 { "get_is_connected", InputStateInfo_get_is_connected },
726 { "get_frame_rate_nom", InputStateInfo_get_frame_rate_nom },
727 { "get_frame_rate_den", InputStateInfo_get_frame_rate_den },
733 LiveInputWrapper::LiveInputWrapper(Theme *theme, EffectChain *chain, bmusb::PixelFormat pixel_format, bool override_bounce, bool deinterlace)
735 pixel_format(pixel_format),
736 deinterlace(deinterlace)
738 ImageFormat inout_format;
739 inout_format.color_space = COLORSPACE_sRGB;
741 // Gamma curve depends on the input signal, and we don't really get any
742 // indications. A camera would be expected to do Rec. 709, but
743 // I haven't checked if any do in practice. However, computers _do_ output
744 // in sRGB gamma (ie., they don't convert from sRGB to Rec. 709), and
745 // I wouldn't really be surprised if most non-professional cameras do, too.
746 // So we pick sRGB as the least evil here.
747 inout_format.gamma_curve = GAMMA_sRGB;
751 deinterlace_effect = new movit::DeinterlaceEffect();
753 // As per the comments in deinterlace_effect.h, we turn this off.
754 // The most likely interlaced input for us is either a camera
755 // (where it's fine to turn it off) or a laptop (where it _should_
757 CHECK(deinterlace_effect->set_int("enable_spatial_interlacing_check", 0));
759 num_inputs = deinterlace_effect->num_inputs();
760 assert(num_inputs == FRAME_HISTORY_LENGTH);
765 if (pixel_format == bmusb::PixelFormat_8BitBGRA) {
766 for (unsigned i = 0; i < num_inputs; ++i) {
767 // We upload our textures ourselves, and Movit swaps
768 // R and B in the shader if we specify BGRA, so lie and say RGBA.
769 if (global_flags.can_disable_srgb_decoder) {
770 rgba_inputs.push_back(new sRGBSwitchingFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
772 rgba_inputs.push_back(new NonsRGBCapableFlatInput(inout_format, FORMAT_RGBA_POSTMULTIPLIED_ALPHA, GL_UNSIGNED_BYTE, global_flags.width, global_flags.height));
774 chain->add_input(rgba_inputs.back());
778 vector<Effect *> reverse_inputs(rgba_inputs.rbegin(), rgba_inputs.rend());
779 chain->add_effect(deinterlace_effect, reverse_inputs);
782 assert(pixel_format == bmusb::PixelFormat_8BitYCbCr ||
783 pixel_format == bmusb::PixelFormat_10BitYCbCr ||
784 pixel_format == bmusb::PixelFormat_8BitYCbCrPlanar);
786 // Most of these settings will be overridden later if using PixelFormat_8BitYCbCrPlanar.
787 input_ycbcr_format.chroma_subsampling_x = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1 : 2;
788 input_ycbcr_format.chroma_subsampling_y = 1;
789 input_ycbcr_format.num_levels = (pixel_format == bmusb::PixelFormat_10BitYCbCr) ? 1024 : 256;
790 input_ycbcr_format.cb_x_position = 0.0;
791 input_ycbcr_format.cr_x_position = 0.0;
792 input_ycbcr_format.cb_y_position = 0.5;
793 input_ycbcr_format.cr_y_position = 0.5;
794 input_ycbcr_format.luma_coefficients = YCBCR_REC_709; // Will be overridden later even if not planar.
795 input_ycbcr_format.full_range = false; // Will be overridden later even if not planar.
797 for (unsigned i = 0; i < num_inputs; ++i) {
798 // When using 10-bit input, we're converting to interleaved through v210Converter.
799 YCbCrInputSplitting splitting;
800 if (pixel_format == bmusb::PixelFormat_10BitYCbCr) {
801 splitting = YCBCR_INPUT_INTERLEAVED;
802 } else if (pixel_format == bmusb::PixelFormat_8BitYCbCr) {
803 splitting = YCBCR_INPUT_SPLIT_Y_AND_CBCR;
805 splitting = YCBCR_INPUT_PLANAR;
807 if (override_bounce) {
808 ycbcr_inputs.push_back(new NonBouncingYCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
810 ycbcr_inputs.push_back(new YCbCrInput(inout_format, input_ycbcr_format, global_flags.width, global_flags.height, splitting));
812 chain->add_input(ycbcr_inputs.back());
816 vector<Effect *> reverse_inputs(ycbcr_inputs.rbegin(), ycbcr_inputs.rend());
817 chain->add_effect(deinterlace_effect, reverse_inputs);
822 void LiveInputWrapper::connect_signal(int signal_num)
824 if (global_mixer == nullptr) {
829 signal_num = theme->map_signal(signal_num);
830 connect_signal_raw(signal_num, *theme->input_state);
833 void LiveInputWrapper::connect_signal_raw(int signal_num, const InputState &input_state)
835 BufferedFrame first_frame = input_state.buffered_frames[signal_num][0];
836 if (first_frame.frame == nullptr) {
840 unsigned width, height;
842 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)first_frame.frame->userdata;
843 width = userdata->last_width[first_frame.field_number];
844 height = userdata->last_height[first_frame.field_number];
847 movit::YCbCrLumaCoefficients ycbcr_coefficients = input_state.ycbcr_coefficients[signal_num];
848 bool full_range = input_state.full_range[signal_num];
850 if (input_state.ycbcr_coefficients_auto[signal_num]) {
853 // The Blackmagic driver docs claim that the device outputs Y'CbCr
854 // according to Rec. 601, but this seems to indicate the subsampling
855 // positions only, as they publish Y'CbCr → RGB formulas that are
856 // different for HD and SD (corresponding to Rec. 709 and 601, respectively),
857 // and a Lenovo X1 gen 3 I used to test definitely outputs Rec. 709
858 // (at least up to rounding error). Other devices seem to use Rec. 601
859 // even on HD resolutions. Nevertheless, Rec. 709 _is_ the right choice
860 // for HD, so we default to that if the user hasn't set anything.
862 ycbcr_coefficients = YCBCR_REC_709;
864 ycbcr_coefficients = YCBCR_REC_601;
868 // This is a global, but it doesn't really matter.
869 input_ycbcr_format.luma_coefficients = ycbcr_coefficients;
870 input_ycbcr_format.full_range = full_range;
872 BufferedFrame last_good_frame = first_frame;
873 for (unsigned i = 0; i < max(ycbcr_inputs.size(), rgba_inputs.size()); ++i) {
874 BufferedFrame frame = input_state.buffered_frames[signal_num][i];
875 if (frame.frame == nullptr) {
876 // Not enough data; reuse last frame (well, field).
877 // This is suboptimal, but we have nothing better.
878 frame = last_good_frame;
880 const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
882 unsigned this_width = userdata->last_width[frame.field_number];
883 unsigned this_height = userdata->last_height[frame.field_number];
884 if (this_width != width || this_height != height) {
885 // Resolution changed; reuse last frame/field.
886 frame = last_good_frame;
887 userdata = (const PBOFrameAllocator::Userdata *)frame.frame->userdata;
890 assert(userdata->pixel_format == pixel_format);
891 switch (pixel_format) {
892 case bmusb::PixelFormat_8BitYCbCr:
893 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
894 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cbcr[frame.field_number]);
895 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
896 ycbcr_inputs[i]->set_width(width);
897 ycbcr_inputs[i]->set_height(height);
899 case bmusb::PixelFormat_8BitYCbCrPlanar:
900 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_y[frame.field_number]);
901 ycbcr_inputs[i]->set_texture_num(1, userdata->tex_cb[frame.field_number]);
902 ycbcr_inputs[i]->set_texture_num(2, userdata->tex_cr[frame.field_number]);
903 ycbcr_inputs[i]->change_ycbcr_format(userdata->ycbcr_format);
904 ycbcr_inputs[i]->set_width(width);
905 ycbcr_inputs[i]->set_height(height);
907 case bmusb::PixelFormat_10BitYCbCr:
908 ycbcr_inputs[i]->set_texture_num(0, userdata->tex_444[frame.field_number]);
909 ycbcr_inputs[i]->change_ycbcr_format(input_ycbcr_format);
910 ycbcr_inputs[i]->set_width(width);
911 ycbcr_inputs[i]->set_height(height);
913 case bmusb::PixelFormat_8BitBGRA:
914 rgba_inputs[i]->set_texture_num(userdata->tex_rgba[frame.field_number]);
915 rgba_inputs[i]->set_width(width);
916 rgba_inputs[i]->set_height(height);
922 last_good_frame = frame;
926 BufferedFrame frame = input_state.buffered_frames[signal_num][0];
927 CHECK(deinterlace_effect->set_int("current_field_position", frame.field_number));
933 int call_num_channels(lua_State *L)
935 lua_getglobal(L, "num_channels");
937 if (lua_pcall(L, 0, 1, 0) != 0) {
938 fprintf(stderr, "error running function `num_channels': %s\n", lua_tostring(L, -1));
942 int num_channels = luaL_checknumber(L, 1);
944 assert(lua_gettop(L) == 0);
950 Theme::Theme(const string &filename, const vector<string> &search_dirs, ResourcePool *resource_pool, unsigned num_cards)
951 : resource_pool(resource_pool), num_cards(num_cards), signal_to_card_mapping(global_flags.default_stream_mapping)
956 register_constants();
957 register_class("EffectChain", EffectChain_funcs);
958 register_class("LiveInputWrapper", LiveInputWrapper_funcs);
959 register_class("ImageInput", ImageInput_funcs);
960 register_class("VideoInput", VideoInput_funcs);
961 register_class("HTMLInput", HTMLInput_funcs);
962 register_class("WhiteBalanceEffect", WhiteBalanceEffect_funcs);
963 register_class("ResampleEffect", ResampleEffect_funcs);
964 register_class("PaddingEffect", PaddingEffect_funcs);
965 register_class("IntegralPaddingEffect", IntegralPaddingEffect_funcs);
966 register_class("OverlayEffect", OverlayEffect_funcs);
967 register_class("ResizeEffect", ResizeEffect_funcs);
968 register_class("MultiplyEffect", MultiplyEffect_funcs);
969 register_class("MixEffect", MixEffect_funcs);
970 register_class("InputStateInfo", InputStateInfo_funcs);
972 // Run script. Search through all directories until we find a file that will load
973 // (as in, does not return LUA_ERRFILE); then run it. We store load errors
974 // from all the attempts, and show them once we know we can't find any of them.
976 vector<string> errors;
977 bool success = false;
978 for (size_t i = 0; i < search_dirs.size(); ++i) {
979 string path = search_dirs[i] + "/" + filename;
980 int err = luaL_loadfile(L, path.c_str());
982 // Success; actually call the code.
983 if (lua_pcall(L, 0, LUA_MULTRET, 0)) {
984 fprintf(stderr, "Error when running %s: %s\n", path.c_str(), lua_tostring(L, -1));
990 errors.push_back(lua_tostring(L, -1));
992 if (err != LUA_ERRFILE) {
993 // The file actually loaded, but failed to parse somehow. Abort; don't try the next one.
999 for (const string &error : errors) {
1000 fprintf(stderr, "%s\n", error.c_str());
1004 assert(lua_gettop(L) == 0);
1006 // Ask it for the number of channels.
1007 num_channels = call_num_channels(L);
1015 void Theme::register_constants()
1017 // Set Nageru.VIDEO_FORMAT_BGRA = bmusb::PixelFormat_8BitBGRA, etc.
1018 const vector<pair<string, int>> constants = {
1019 { "VIDEO_FORMAT_BGRA", bmusb::PixelFormat_8BitBGRA },
1020 { "VIDEO_FORMAT_YCBCR", bmusb::PixelFormat_8BitYCbCrPlanar },
1023 lua_newtable(L); // t = {}
1025 for (const pair<string, int> &constant : constants) {
1026 lua_pushstring(L, constant.first.c_str());
1027 lua_pushinteger(L, constant.second);
1028 lua_settable(L, 1); // t[key] = value
1031 lua_setglobal(L, "Nageru"); // Nageru = t
1032 assert(lua_gettop(L) == 0);
1035 void Theme::register_class(const char *class_name, const luaL_Reg *funcs)
1037 assert(lua_gettop(L) == 0);
1038 luaL_newmetatable(L, class_name); // mt = {}
1039 lua_pushlightuserdata(L, this);
1040 luaL_setfuncs(L, funcs, 1); // for (name,f in funcs) { mt[name] = f, with upvalue {theme} }
1041 lua_pushvalue(L, -1);
1042 lua_setfield(L, -2, "__index"); // mt.__index = mt
1043 lua_setglobal(L, class_name); // ClassName = mt
1044 assert(lua_gettop(L) == 0);
1047 Theme::Chain Theme::get_chain(unsigned num, float t, unsigned width, unsigned height, InputState input_state)
1051 unique_lock<mutex> lock(m);
1052 assert(lua_gettop(L) == 0);
1053 lua_getglobal(L, "get_chain"); /* function to be called */
1054 lua_pushnumber(L, num);
1055 lua_pushnumber(L, t);
1056 lua_pushnumber(L, width);
1057 lua_pushnumber(L, height);
1058 wrap_lua_object<InputStateInfo>(L, "InputStateInfo", input_state);
1060 if (lua_pcall(L, 5, 2, 0) != 0) {
1061 fprintf(stderr, "error running function `get_chain': %s\n", lua_tostring(L, -1));
1065 chain.chain = (EffectChain *)luaL_testudata(L, -2, "EffectChain");
1066 if (chain.chain == nullptr) {
1067 fprintf(stderr, "get_chain() for chain number %d did not return an EffectChain\n",
1071 if (!lua_isfunction(L, -1)) {
1072 fprintf(stderr, "Argument #-1 should be a function\n");
1075 lua_pushvalue(L, -1);
1076 shared_ptr<LuaRefWithDeleter> funcref(new LuaRefWithDeleter(&m, L, luaL_ref(L, LUA_REGISTRYINDEX)));
1078 assert(lua_gettop(L) == 0);
1080 chain.setup_chain = [this, funcref, input_state]{
1081 unique_lock<mutex> lock(m);
1083 assert(this->input_state == nullptr);
1084 this->input_state = &input_state;
1086 // Set up state, including connecting signals.
1087 lua_rawgeti(L, LUA_REGISTRYINDEX, funcref->get());
1088 if (lua_pcall(L, 0, 0, 0) != 0) {
1089 fprintf(stderr, "error running chain setup callback: %s\n", lua_tostring(L, -1));
1092 assert(lua_gettop(L) == 0);
1094 this->input_state = nullptr;
1097 // TODO: Can we do better, e.g. by running setup_chain() and seeing what it references?
1098 // Actually, setup_chain does maybe hold all the references we need now anyway?
1099 chain.input_frames.reserve(num_cards * FRAME_HISTORY_LENGTH);
1100 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
1101 for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
1102 chain.input_frames.push_back(input_state.buffered_frames[card_index][frame_num].frame);
1109 string Theme::get_channel_name(unsigned channel)
1111 unique_lock<mutex> lock(m);
1112 lua_getglobal(L, "channel_name");
1113 lua_pushnumber(L, channel);
1114 if (lua_pcall(L, 1, 1, 0) != 0) {
1115 fprintf(stderr, "error running function `channel_name': %s\n", lua_tostring(L, -1));
1118 const char *ret = lua_tostring(L, -1);
1119 if (ret == nullptr) {
1120 fprintf(stderr, "function `channel_name' returned nil for channel %d\n", channel);
1124 string retstr = ret;
1126 assert(lua_gettop(L) == 0);
1130 int Theme::get_channel_signal(unsigned channel)
1132 unique_lock<mutex> lock(m);
1133 lua_getglobal(L, "channel_signal");
1134 lua_pushnumber(L, channel);
1135 if (lua_pcall(L, 1, 1, 0) != 0) {
1136 fprintf(stderr, "error running function `channel_signal': %s\n", lua_tostring(L, -1));
1140 int ret = luaL_checknumber(L, 1);
1142 assert(lua_gettop(L) == 0);
1146 std::string Theme::get_channel_color(unsigned channel)
1148 unique_lock<mutex> lock(m);
1149 lua_getglobal(L, "channel_color");
1150 lua_pushnumber(L, channel);
1151 if (lua_pcall(L, 1, 1, 0) != 0) {
1152 fprintf(stderr, "error running function `channel_color': %s\n", lua_tostring(L, -1));
1156 const char *ret = lua_tostring(L, -1);
1157 if (ret == nullptr) {
1158 fprintf(stderr, "function `channel_color' returned nil for channel %d\n", channel);
1162 string retstr = ret;
1164 assert(lua_gettop(L) == 0);
1168 bool Theme::get_supports_set_wb(unsigned channel)
1170 unique_lock<mutex> lock(m);
1171 lua_getglobal(L, "supports_set_wb");
1172 lua_pushnumber(L, channel);
1173 if (lua_pcall(L, 1, 1, 0) != 0) {
1174 fprintf(stderr, "error running function `supports_set_wb': %s\n", lua_tostring(L, -1));
1178 bool ret = checkbool(L, -1);
1180 assert(lua_gettop(L) == 0);
1184 void Theme::set_wb(unsigned channel, double r, double g, double b)
1186 unique_lock<mutex> lock(m);
1187 lua_getglobal(L, "set_wb");
1188 lua_pushnumber(L, channel);
1189 lua_pushnumber(L, r);
1190 lua_pushnumber(L, g);
1191 lua_pushnumber(L, b);
1192 if (lua_pcall(L, 4, 0, 0) != 0) {
1193 fprintf(stderr, "error running function `set_wb': %s\n", lua_tostring(L, -1));
1197 assert(lua_gettop(L) == 0);
1200 vector<string> Theme::get_transition_names(float t)
1202 unique_lock<mutex> lock(m);
1203 lua_getglobal(L, "get_transitions");
1204 lua_pushnumber(L, t);
1205 if (lua_pcall(L, 1, 1, 0) != 0) {
1206 fprintf(stderr, "error running function `get_transitions': %s\n", lua_tostring(L, -1));
1212 while (lua_next(L, -2) != 0) {
1213 ret.push_back(lua_tostring(L, -1));
1217 assert(lua_gettop(L) == 0);
1221 int Theme::map_signal(int signal_num)
1223 // Negative numbers map to raw signals.
1224 if (signal_num < 0) {
1225 return -1 - signal_num;
1228 unique_lock<mutex> lock(map_m);
1229 if (signal_to_card_mapping.count(signal_num)) {
1230 return signal_to_card_mapping[signal_num];
1234 if (global_flags.output_card != -1 && num_cards > 1) {
1235 // Try to exclude the output card from the default card_index.
1236 card_index = signal_num % (num_cards - 1);
1237 if (card_index >= global_flags.output_card) {
1240 if (signal_num >= int(num_cards - 1)) {
1241 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u input card(s) (card %d is busy with output).\n",
1242 signal_num, num_cards - 1, global_flags.output_card);
1243 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1246 card_index = signal_num % num_cards;
1247 if (signal_num >= int(num_cards)) {
1248 fprintf(stderr, "WARNING: Theme asked for input %d, but we only have %u card(s).\n", signal_num, num_cards);
1249 fprintf(stderr, "Mapping to card %d instead.\n", card_index);
1252 signal_to_card_mapping[signal_num] = card_index;
1256 void Theme::set_signal_mapping(int signal_num, int card_num)
1258 unique_lock<mutex> lock(map_m);
1259 assert(card_num < int(num_cards));
1260 signal_to_card_mapping[signal_num] = card_num;
1263 void Theme::transition_clicked(int transition_num, float t)
1265 unique_lock<mutex> lock(m);
1266 lua_getglobal(L, "transition_clicked");
1267 lua_pushnumber(L, transition_num);
1268 lua_pushnumber(L, t);
1270 if (lua_pcall(L, 2, 0, 0) != 0) {
1271 fprintf(stderr, "error running function `transition_clicked': %s\n", lua_tostring(L, -1));
1274 assert(lua_gettop(L) == 0);
1277 void Theme::channel_clicked(int preview_num)
1279 unique_lock<mutex> lock(m);
1280 lua_getglobal(L, "channel_clicked");
1281 lua_pushnumber(L, preview_num);
1283 if (lua_pcall(L, 1, 0, 0) != 0) {
1284 fprintf(stderr, "error running function `channel_clicked': %s\n", lua_tostring(L, -1));
1287 assert(lua_gettop(L) == 0);