-- Themes are written in Lua, which reflects a simplified form of the Movit API
-- where all the low-level details (such as texture formats) are handled by the
-- C++ side and you generally just build chains.
-io.write("hello from lua\n");
+io.write("hello from lua\n")
-local zoom_start = -2.0;
-local zoom_end = -1.0;
-local zoom_src = 0.0;
-local zoom_dst = 1.0;
+local zoom_start = -2.0
+local zoom_end = -1.0
+local zoom_src = 0.0
+local zoom_dst = 1.0
-local live_signal_num = 0;
-local preview_signal_num = 1;
+local live_signal_num = 0
+local preview_signal_num = 1
-- The main live chain.
-local main_chain = EffectChain.new(16, 9);
-local input0 = main_chain:add_live_input();
-input0:connect_signal(0);
-local input1 = main_chain:add_live_input();
-input1:connect_signal(1);
-local resample_effect = main_chain:add_effect(ResampleEffect.new(), input0);
-local padding_effect = main_chain:add_effect(IntegralPaddingEffect.new());
-padding_effect:set_vec4("border_color", 0.0, 0.0, 0.0, 1.0);
-
-local resample2_effect = main_chain:add_effect(ResampleEffect.new(), input1);
--- Effect *saturation_effect = main_chain->add_effect(new SaturationEffect());
--- CHECK(saturation_effect->set_float("saturation", 0.3f));
-local wb_effect = main_chain:add_effect(WhiteBalanceEffect.new());
-wb_effect:set_float("output_color_temperature", 3500.0);
-local padding2_effect = main_chain:add_effect(IntegralPaddingEffect.new());
-
-main_chain:add_effect(OverlayEffect.new(), padding_effect, padding2_effect);
-main_chain:finalize(true);
+local main_chain = EffectChain.new(16, 9)
+local input0 = main_chain:add_live_input()
+input0:connect_signal(0)
+local input1 = main_chain:add_live_input()
+input1:connect_signal(1)
+local resample_effect = main_chain:add_effect(ResampleEffect.new(), input0)
+local padding_effect = main_chain:add_effect(IntegralPaddingEffect.new())
+padding_effect:set_vec4("border_color", 0.0, 0.0, 0.0, 1.0)
+
+local resample2_effect = main_chain:add_effect(ResampleEffect.new(), input1)
+-- Effect *saturation_effect = main_chain->add_effect(new SaturationEffect())
+-- CHECK(saturation_effect->set_float("saturation", 0.3f))
+local wb_effect = main_chain:add_effect(WhiteBalanceEffect.new())
+wb_effect:set_float("output_color_temperature", 3500.0)
+local padding2_effect = main_chain:add_effect(IntegralPaddingEffect.new())
+
+main_chain:add_effect(OverlayEffect.new(), padding_effect, padding2_effect)
+main_chain:finalize(true)
-- A chain to show a single input on screen (HQ version).
-local simple_chain_hq = EffectChain.new(16, 9);
-local simple_chain_hq_input = simple_chain_hq:add_live_input();
+local simple_chain_hq = EffectChain.new(16, 9)
+local simple_chain_hq_input = simple_chain_hq:add_live_input()
simple_chain_hq_input:connect_signal(0); -- First input card. Can be changed whenever you want.
-simple_chain_hq:finalize(true);
+simple_chain_hq:finalize(true)
-- A chain to show a single input on screen (LQ version).
-local simple_chain_lq = EffectChain.new(16, 9);
-local simple_chain_lq_input = simple_chain_lq:add_live_input();
+local simple_chain_lq = EffectChain.new(16, 9)
+local simple_chain_lq_input = simple_chain_lq:add_live_input()
simple_chain_lq_input:connect_signal(0); -- First input card. Can be changed whenever you want.
-simple_chain_lq:finalize(false);
+simple_chain_lq:finalize(false)
-- Returns the number of outputs in addition to the live (0) and preview (1).
-- Called only once, at the start of the program.
function num_channels()
- return 2;
+ return 2
end
-- Called every frame.
function get_transitions()
- return {"Cut", "Fade", "Zoom!"};
+ return {"Cut", "Fade", "Zoom!"}
end
function transition_clicked(num, t)
- -- local temp = live_signal_num;
- -- live_signal_num = preview_signal_num;
- -- preview_signal_num = temp;
+ -- local temp = live_signal_num
+ -- live_signal_num = preview_signal_num
+ -- preview_signal_num = temp
- zoom_start = t;
- zoom_end = t + 1.0;
+ zoom_start = t
+ zoom_end = t + 1.0
- local temp = zoom_src;
- zoom_src = zoom_dst;
- zoom_dst = temp;
+ local temp = zoom_src
+ zoom_src = zoom_dst
+ zoom_dst = temp
end
function channel_clicked(num, t)
-- Presumably change the preview here.
- io.write("STUB: channel_clicked\n");
+ io.write("STUB: channel_clicked\n")
end
-- Called every frame. Get the chain for displaying at input <num>,
if t > zoom_end and zoom_dst == 1.0 then
-- Special case: Show only the single image on screen.
prepare = function()
- simple_chain_hq_input:connect_signal(live_signal_num);
+ simple_chain_hq_input:connect_signal(live_signal_num)
end
- return simple_chain_hq, prepare;
+ return simple_chain_hq, prepare
end
prepare = function()
if t < zoom_start then
- prepare_sbs_chain(zoom_src, width, height);
+ prepare_sbs_chain(zoom_src, width, height)
elseif t > zoom_end then
- prepare_sbs_chain(zoom_dst, width, height);
+ prepare_sbs_chain(zoom_dst, width, height)
else
- local tt = (t - zoom_start) / (zoom_end - zoom_start);
+ local tt = (t - zoom_start) / (zoom_end - zoom_start)
-- Smooth it a bit.
tt = math.sin(tt * 3.14159265358 * 0.5)
- prepare_sbs_chain(zoom_src + (zoom_dst - zoom_src) * tt, width, height);
+ prepare_sbs_chain(zoom_src + (zoom_dst - zoom_src) * tt, width, height)
end
end
- return main_chain, prepare;
+ return main_chain, prepare
end
if num == 1 then -- Preview.
prepare = function()
- simple_chain_lq_input:connect_signal(preview_signal_num);
+ simple_chain_lq_input:connect_signal(preview_signal_num)
end
- return simple_chain_lq, prepare;
+ return simple_chain_lq, prepare
end
if num == 2 then
prepare = function()
- simple_chain_lq_input:connect_signal(0);
+ simple_chain_lq_input:connect_signal(0)
end
- return simple_chain_lq, prepare;
+ return simple_chain_lq, prepare
end
if num == 3 then
prepare = function()
- simple_chain_lq_input:connect_signal(1);
+ simple_chain_lq_input:connect_signal(1)
end
- return simple_chain_lq, prepare;
+ return simple_chain_lq, prepare
end
end
function place_rectangle(resample_effect, padding_effect, x0, y0, x1, y1, screen_width, screen_height)
- local srcx0 = 0.0;
- local srcx1 = 1.0;
- local srcy0 = 0.0;
- local srcy1 = 1.0;
+ local srcx0 = 0.0
+ local srcx1 = 1.0
+ local srcy0 = 0.0
+ local srcy1 = 1.0
-- Cull.
if x0 > screen_width or x1 < 0.0 or y0 > screen_height or y1 < 0.0 then
- resample_effect:set_int("width", 1);
- resample_effect:set_int("height", 1);
- resample_effect:set_float("zoom_x", screen_width);
- resample_effect:set_float("zoom_y", screen_height);
- padding_effect:set_int("left", screen_width + 100);
- padding_effect:set_int("top", screen_height + 100);
- return;
+ resample_effect:set_int("width", 1)
+ resample_effect:set_int("height", 1)
+ resample_effect:set_float("zoom_x", screen_width)
+ resample_effect:set_float("zoom_y", screen_height)
+ padding_effect:set_int("left", screen_width + 100)
+ padding_effect:set_int("top", screen_height + 100)
+ return
end
-- Clip. (TODO: Clip on upper/left sides, too.)
if x1 > screen_width then
- srcx1 = (screen_width - x0) / (x1 - x0);
- x1 = screen_width;
+ srcx1 = (screen_width - x0) / (x1 - x0)
+ x1 = screen_width
end
if y1 > screen_height then
- srcy1 = (screen_height - y0) / (y1 - y0);
- y1 = screen_height;
+ srcy1 = (screen_height - y0) / (y1 - y0)
+ y1 = screen_height
end
- local x_subpixel_offset = x0 - math.floor(x0);
- local y_subpixel_offset = y0 - math.floor(y0);
+ local x_subpixel_offset = x0 - math.floor(x0)
+ local y_subpixel_offset = y0 - math.floor(y0)
-- Resampling must be to an integral number of pixels. Round up,
-- and then add an extra pixel so we have some leeway for the border.
- local width = math.ceil(x1 - x0) + 1;
- local height = math.ceil(y1 - y0) + 1;
- resample_effect:set_int("width", width);
- resample_effect:set_int("height", height);
+ local width = math.ceil(x1 - x0) + 1
+ local height = math.ceil(y1 - y0) + 1
+ resample_effect:set_int("width", width)
+ resample_effect:set_int("height", height)
-- Correct the discrepancy with zoom. (This will leave a small
-- excess edge of pixels and subpixels, which we'll correct for soon.)
- local zoom_x = (x1 - x0) / (width * (srcx1 - srcx0));
- local zoom_y = (y1 - y0) / (height * (srcy1 - srcy0));
- resample_effect:set_float("zoom_x", zoom_x);
- resample_effect:set_float("zoom_y", zoom_y);
- resample_effect:set_float("zoom_center_x", 0.0);
- resample_effect:set_float("zoom_center_y", 0.0);
+ local zoom_x = (x1 - x0) / (width * (srcx1 - srcx0))
+ local zoom_y = (y1 - y0) / (height * (srcy1 - srcy0))
+ resample_effect:set_float("zoom_x", zoom_x)
+ resample_effect:set_float("zoom_y", zoom_y)
+ resample_effect:set_float("zoom_center_x", 0.0)
+ resample_effect:set_float("zoom_center_y", 0.0)
-- Padding must also be to a whole-pixel offset.
- padding_effect:set_int("left", math.floor(x0));
- padding_effect:set_int("top", math.floor(y0));
+ padding_effect:set_int("left", math.floor(x0))
+ padding_effect:set_int("top", math.floor(y0))
-- Correct _that_ discrepancy by subpixel offset in the resampling.
- resample_effect:set_float("left", -x_subpixel_offset / zoom_x);
- resample_effect:set_float("top", -y_subpixel_offset / zoom_y);
+ resample_effect:set_float("left", -x_subpixel_offset / zoom_x)
+ resample_effect:set_float("top", -y_subpixel_offset / zoom_y)
-- Finally, adjust the border so it is exactly where we want it.
- padding_effect:set_float("border_offset_left", x_subpixel_offset);
- padding_effect:set_float("border_offset_right", x1 - (math.floor(x0) + width));
- padding_effect:set_float("border_offset_top", y_subpixel_offset);
- padding_effect:set_float("border_offset_bottom", y1 - (math.floor(y0) + height));
+ padding_effect:set_float("border_offset_left", x_subpixel_offset)
+ padding_effect:set_float("border_offset_right", x1 - (math.floor(x0) + width))
+ padding_effect:set_float("border_offset_top", y_subpixel_offset)
+ padding_effect:set_float("border_offset_bottom", y1 - (math.floor(y0) + height))
end
-- This is broken, of course (even for positive numbers), but Lua doesn't give us access to real rounding.
end
function prepare_sbs_chain(t, screen_width, screen_height)
- input0:connect_signal(live_signal_num);
- input1:connect_signal(1);
+ input0:connect_signal(live_signal_num)
+ input1:connect_signal(1)
-- First input is positioned (16,48) from top-left.
- local width0 = round(848 * screen_width/1280.0);
- local height0 = round(width0 * 9.0 / 16.0);
+ local width0 = round(848 * screen_width/1280.0)
+ local height0 = round(width0 * 9.0 / 16.0)
- local top0 = 48 * screen_height/720.0;
- local left0 = 16 * screen_width/1280.0;
- local bottom0 = top0 + height0;
- local right0 = left0 + width0;
+ local top0 = 48 * screen_height/720.0
+ local left0 = 16 * screen_width/1280.0
+ local bottom0 = top0 + height0
+ local right0 = left0 + width0
-- Second input is positioned (16,48) from the bottom-right.
- local width1 = 384 * screen_width/1280.0;
- local height1 = 216 * screen_height/720.0;
+ local width1 = 384 * screen_width/1280.0
+ local height1 = 216 * screen_height/720.0
- local bottom1 = screen_height - 48 * screen_height/720.0;
- local right1 = screen_width - 16 * screen_width/1280.0;
- local top1 = bottom1 - height1;
- local left1 = right1 - width1;
+ local bottom1 = screen_height - 48 * screen_height/720.0
+ local right1 = screen_width - 16 * screen_width/1280.0
+ local top1 = bottom1 - height1
+ local left1 = right1 - width1
-- Interpolate between the fullscreen and side-by-side views.
- local scale0 = 1.0 + t * (1280.0 / 848.0 - 1.0);
- local tx0 = 0.0 + t * (-left0 * scale0);
- local ty0 = 0.0 + t * (-top0 * scale0);
-
- top0 = top0 * scale0 + ty0;
- bottom0 = bottom0 * scale0 + ty0;
- left0 = left0 * scale0 + tx0;
- right0 = right0 * scale0 + tx0;
-
- top1 = top1 * scale0 + ty0;
- bottom1 = bottom1 * scale0 + ty0;
- left1 = left1 * scale0 + tx0;
- right1 = right1 * scale0 + tx0;
- place_rectangle(resample_effect, padding_effect, left0, top0, right0, bottom0, screen_width, screen_height);
- place_rectangle(resample2_effect, padding2_effect, left1, top1, right1, bottom1, screen_width, screen_height);
+ local scale0 = 1.0 + t * (1280.0 / 848.0 - 1.0)
+ local tx0 = 0.0 + t * (-left0 * scale0)
+ local ty0 = 0.0 + t * (-top0 * scale0)
+
+ top0 = top0 * scale0 + ty0
+ bottom0 = bottom0 * scale0 + ty0
+ left0 = left0 * scale0 + tx0
+ right0 = right0 * scale0 + tx0
+
+ top1 = top1 * scale0 + ty0
+ bottom1 = bottom1 * scale0 + ty0
+ left1 = left1 * scale0 + tx0
+ right1 = right1 * scale0 + tx0
+ place_rectangle(resample_effect, padding_effect, left0, top0, right0, bottom0, screen_width, screen_height)
+ place_rectangle(resample2_effect, padding2_effect, left1, top1, right1, bottom1, screen_width, screen_height)
end
projects / nageru / commitdiff