obs-transitions: Add 'Luma Wipe' transition

Closes jp9000/obs-studio#558

plugins/obs-transitions/CMakeLists.txt

@@ -7,6 +7,7 @@ set(obs-transitions_SOURCES
 	transition-fade.c
 	transition-cut.c
 	transition-fade-to-color.c
+	transition-luma-wipe.c
 	)
 
 add_library(obs-transitions MODULE

plugins/obs-transitions/data/locale/en-US.ini

@@ -11,3 +11,41 @@ Direction.Down="Down"
 SwipeIn="Swipe In"
 Color="Color"
 SwitchPoint="Peak Color Point (percentage)"
+LumaWipeTransition="Luma Wipe"
+LumaWipe.Image="Image"
+LumaWipe.Invert="Invert"
+LumaWipe.Softness="Softness"
+LumaWipe.Type.BarndoorBottomLeft="Barndoor Bottom Left"
+LumaWipe.Type.BarndoorHorizontal="Barndoor Horizontal"
+LumaWipe.Type.BarndoorTopLeft="Barndoor Top Left"
+LumaWipe.Type.BarndoorVertical="Barndoor Vertical"
+LumaWipe.Type.BlindsHorizontal="Blinds Horizontal"
+LumaWipe.Type.BoxBottomLeft="Box Bottom Left"
+LumaWipe.Type.BoxBottomRight="Box Bottom Right"
+LumaWipe.Type.BoxTopLeft="Box Top Left"
+LumaWipe.Type.BoxTopRight="Box Top Right"
+LumaWipe.Type.Burst="Burst"
+LumaWipe.Type.CheckerboardSmall="Checkerboard Small"
+LumaWipe.Type.Circles="Circles"
+LumaWipe.Type.Clock="Clock"
+LumaWipe.Type.Cloud="Cloud"
+LumaWipe.Type.Curtain="Curtain"
+LumaWipe.Type.Fan="Fan"
+LumaWipe.Type.Fractal="Fractal"
+LumaWipe.Type.Iris="Iris"
+LumaWipe.Type.LinearHorizontal="Linear Horizontal"
+LumaWipe.Type.LinearTopLeft="Linear Top Left"
+LumaWipe.Type.LinearTopRight="Linear Top Right"
+LumaWipe.Type.LinearVertical="Linear Vertical"
+LumaWipe.Type.ParallelZigzagHorizontal="Parallel Zigzag Horizontal"
+LumaWipe.Type.ParallelZigzagVertical="Parallel Zigzag Vertical"
+LumaWipe.Type.Sinus9="Sinus 9"
+LumaWipe.Type.Spiral="Spiral"
+LumaWipe.Type.Square="Square"
+LumaWipe.Type.Squares="Squares"
+LumaWipe.Type.Stripes="Stripes"
+LumaWipe.Type.StripsHorizontal="Strips Horizontal"
+LumaWipe.Type.StripsVertical="Strips Vertical"
+LumaWipe.Type.Watercolor="Watercolor"
+LumaWipe.Type.ZigzagHorizontal="Zigzag Horizontal"
+LumaWipe.Type.ZigzagVertical="Zigzag Vertical"

plugins/obs-transitions/data/luma_wipe_transition.effect

+// Based rendermix wipe shader
+// https://github.com/rectalogic/rendermix-basic-effects/blob/master/assets/com/rendermix/Wipe/Wipe.frag
+
+uniform float4x4  ViewProj;
+uniform texture2d a_tex;
+uniform texture2d b_tex;
+uniform texture2d l_tex;
+uniform float progress;
+uniform bool  invert;
+uniform float softness;
+
+sampler_state textureSampler {
+	Filter    = Linear;
+	AddressU  = Clamp;
+	AddressV  = Clamp;
+};
+
+struct VertData {
+	float4 pos : POSITION;
+	float2 uv  : TEXCOORD0;
+};
+
+VertData VSDefault(VertData v_in)
+{
+	VertData vert_out;
+	vert_out.pos = mul(float4(v_in.pos.xyz, 1.0), ViewProj);
+	vert_out.uv  = v_in.uv;
+	return vert_out;
+}
+
+float4 PSLumaWipe(VertData v_in) : TARGET
+{
+	float2 uv = v_in.uv;
+	float4 a_color = a_tex.Sample(textureSampler, uv);
+	float4 b_color = b_tex.Sample(textureSampler, uv);
+	float luma     = l_tex.Sample(textureSampler, uv).x;
+
+	if (invert)
+		luma = 1.0f - luma;
+
+	float time = lerp(0.0f, 1.0f + softness, progress);
+
+	if (luma <= time - softness)
+		return b_color;
+
+	if (luma >= time)
+		return a_color;
+
+	float alpha = (time - luma) / softness;
+
+	return lerp(a_color, b_color, alpha);
+}
+
+technique LumaWipe
+{
+	pass
+	{
+		vertex_shader = VSDefault(v_in);
+		pixel_shader = PSLumaWipe(v_in);
+	}
+}

plugins/obs-transitions/data/luma_wipes/wipes.json

+{
+	"LumaWipe.Type.BarndoorBottomLeft": "barndoor-botleft.png",
+	"LumaWipe.Type.BarndoorHorizontal": "barndoor-h.png",
+	"LumaWipe.Type.BarndoorTopLeft": "barndoor-topleft.png",
+	"LumaWipe.Type.BarndoorVertical": "barndoor-v.png",
+	"LumaWipe.Type.BlindsHorizontal": "blinds-h.png",
+	"LumaWipe.Type.BoxBottomLeft": "box-botleft.png",
+	"LumaWipe.Type.BoxBottomRight": "box-botright.png",
+	"LumaWipe.Type.BoxTopLeft": "box-topleft.png",
+	"LumaWipe.Type.BoxTopRight": "box-topright.png",
+	"LumaWipe.Type.Burst": "burst.png",
+	"LumaWipe.Type.CheckerboardSmall": "checkerboard-small.png",
+	"LumaWipe.Type.Circles": "circles.png",
+	"LumaWipe.Type.Clock": "clock.png",
+	"LumaWipe.Type.Cloud": "cloud.png",
+	"LumaWipe.Type.Curtain": "curtain.png",
+	"LumaWipe.Type.Fan": "fan.png",
+	"LumaWipe.Type.Fractal": "fractal.png",
+	"LumaWipe.Type.Iris": "iris.png",
+	"LumaWipe.Type.LinearHorizontal": "linear-h.png",
+	"LumaWipe.Type.LinearTopLeft": "linear-topleft.png",
+	"LumaWipe.Type.LinearTopRight": "linear-topright.png",
+	"LumaWipe.Type.LinearVertical": "linear-v.png",
+	"LumaWipe.Type.ParallelZigzagHorizontal": "parallel-zigzag-h.png",
+	"LumaWipe.Type.ParallelZigzagVertical": "parallel-zigzag-v.png",
+	"LumaWipe.Type.Sinus9": "sinus9.png",
+	"LumaWipe.Type.Spiral": "spiral.png",
+	"LumaWipe.Type.Square": "square.png",
+	"LumaWipe.Type.Squares": "squares.png",
+	"LumaWipe.Type.Stripes": "stripes.png",
+	"LumaWipe.Type.StripsHorizontal": "strips-h.png",
+	"LumaWipe.Type.StripsVertical": "strips-v.png",
+	"LumaWipe.Type.Watercolor": "watercolor.png",
+	"LumaWipe.Type.ZigzagHorizontal": "zigzag-h.png",
+	"LumaWipe.Type.ZigzagVertical": "zigzag-v.png"
+}

plugins/obs-transitions/obs-transitions.c

@@ -9,6 +9,7 @@ extern struct obs_source_info fade_transition;
 extern struct obs_source_info swipe_transition;
 extern struct obs_source_info slide_transition;
 extern struct obs_source_info fade_to_color_transition;
+extern struct obs_source_info luma_wipe_transition;
 
 bool obs_module_load(void)
 {
@@ -17,5 +18,6 @@ bool obs_module_load(void)
 	obs_register_source(&swipe_transition);
 	obs_register_source(&slide_transition);
 	obs_register_source(&fade_to_color_transition);
+	obs_register_source(&luma_wipe_transition);
 	return true;
 }

plugins/obs-transitions/transition-luma-wipe.c

+#include <obs-module.h>
+#include <graphics/image-file.h>
+#include <util/dstr.h>
+
+#define S_LUMA_IMG              "luma_image"
+#define S_LUMA_INV              "luma_invert"
+#define S_LUMA_SOFT             "luma_softness"
+
+#define T_LUMA_IMG              obs_module_text("LumaWipe.Image")
+#define T_LUMA_INV              obs_module_text("LumaWipe.Invert")
+#define T_LUMA_SOFT             obs_module_text("LumaWipe.Softness")
+
+struct luma_wipe_info {
+	obs_source_t *source;
+
+	gs_effect_t *effect;
+	gs_eparam_t *ep_a_tex;
+	gs_eparam_t *ep_b_tex;
+	gs_eparam_t *ep_l_tex;
+	gs_eparam_t *ep_progress;
+	gs_eparam_t *ep_invert;
+	gs_eparam_t *ep_softness;
+
+	gs_image_file_t luma_image;
+	bool  invert_luma;
+	float softness;
+	obs_data_t *wipes_list;
+};
+
+static const char *luma_wipe_get_name(void *type_data)
+{
+	UNUSED_PARAMETER(type_data);
+	return obs_module_text("LumaWipeTransition");
+}
+
+static void luma_wipe_update(void *data, obs_data_t *settings)
+{
+	struct luma_wipe_info *lwipe = data;
+
+	const char *name = obs_data_get_string(settings, S_LUMA_IMG);
+	lwipe->invert_luma = obs_data_get_bool(settings, S_LUMA_INV);
+	lwipe->softness = (float)obs_data_get_double(settings, S_LUMA_SOFT);
+
+	struct dstr path = {0};
+
+	dstr_copy(&path, "luma_wipes/");
+	dstr_cat(&path, name);
+
+	char *file = obs_module_file(path.array);
+
+	obs_enter_graphics();
+	gs_image_file_free(&lwipe->luma_image);
+	obs_leave_graphics();
+
+	gs_image_file_init(&lwipe->luma_image, file);
+
+	obs_enter_graphics();
+	gs_image_file_init_texture(&lwipe->luma_image);
+	obs_leave_graphics();
+
+	bfree(file);
+	dstr_free(&path);
+
+	UNUSED_PARAMETER(settings);
+}
+
+static void luma_wipe_get_list(void *data)
+{
+	struct luma_wipe_info *lwipe = data;
+
+	char *path = obs_module_file("luma_wipes/wipes.json");
+
+	lwipe->wipes_list = obs_data_create_from_json_file(path);
+
+	bfree(path);
+}
+
+static void *luma_wipe_create(obs_data_t *settings, obs_source_t *source)
+{
+	struct luma_wipe_info *lwipe;
+	gs_effect_t *effect;
+	char *file = obs_module_file("luma_wipe_transition.effect");
+
+	obs_enter_graphics();
+	effect = gs_effect_create_from_file(file, NULL);
+	obs_leave_graphics();
+
+	if (!effect) {
+		blog(LOG_ERROR, "Could not open luma_wipe_transition.effect");
+		return NULL;
+	}
+
+	bfree(file);
+
+	lwipe = bzalloc(sizeof(*lwipe));
+
+	lwipe->effect      = effect;
+	lwipe->ep_a_tex    = gs_effect_get_param_by_name(effect, "a_tex");
+	lwipe->ep_b_tex    = gs_effect_get_param_by_name(effect, "b_tex");
+	lwipe->ep_l_tex    = gs_effect_get_param_by_name(effect, "l_tex");
+	lwipe->ep_progress = gs_effect_get_param_by_name(effect, "progress");
+	lwipe->ep_invert   = gs_effect_get_param_by_name(effect, "invert");
+	lwipe->ep_softness = gs_effect_get_param_by_name(effect, "softness");
+	lwipe->source      = source;
+
+	luma_wipe_get_list(lwipe);
+
+	luma_wipe_update(lwipe, settings);
+
+	return lwipe;
+}
+
+static void luma_wipe_destroy(void *data)
+{
+	struct luma_wipe_info *lwipe = data;
+
+	obs_enter_graphics();
+	gs_image_file_free(&lwipe->luma_image);
+	obs_leave_graphics();
+
+	obs_data_release(lwipe->wipes_list);
+
+	bfree(lwipe);
+}
+
+static obs_properties_t *luma_wipe_properties(void *data)
+{
+	obs_properties_t *props = obs_properties_create();
+	struct luma_wipe_info *lwipe = data;
+
+	obs_property_t *p;
+
+	p = obs_properties_add_list(props, S_LUMA_IMG, T_LUMA_IMG,
+			OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
+
+	obs_data_item_t *item = obs_data_first(lwipe->wipes_list);
+
+	for (; item != NULL; obs_data_item_next(&item)) {
+		const char *name = obs_data_item_get_name(item);
+		const char *path = obs_data_item_get_string(item);
+		obs_property_list_add_string(p, obs_module_text(name), path);
+	}
+
+	obs_properties_add_float(props, S_LUMA_SOFT, T_LUMA_SOFT, 0.0, 1.0, 0.05);
+	obs_properties_add_bool(props, S_LUMA_INV, T_LUMA_INV);
+
+	return props;
+}
+
+static void luma_wipe_defaults(obs_data_t *settings)
+{
+	obs_data_set_default_string(settings, S_LUMA_IMG, "linear-h.png");
+	obs_data_set_default_double(settings, S_LUMA_SOFT, 0.03);
+	obs_data_set_default_bool(settings, S_LUMA_INV, false);
+}
+
+static void luma_wipe_callback(void *data, gs_texture_t *a, gs_texture_t *b,
+			       float t, uint32_t cx, uint32_t cy)
+{
+	struct luma_wipe_info *lwipe = data;
+
+	gs_effect_set_texture(lwipe->ep_a_tex, a);
+	gs_effect_set_texture(lwipe->ep_b_tex, b);
+	gs_effect_set_texture(lwipe->ep_l_tex, lwipe->luma_image.texture);
+	gs_effect_set_float(lwipe->ep_progress, t);
+
+	gs_effect_set_bool(lwipe->ep_invert, lwipe->invert_luma);
+	gs_effect_set_float(lwipe->ep_softness, lwipe->softness);
+
+	while (gs_effect_loop(lwipe->effect, "LumaWipe"))
+		gs_draw_sprite(NULL, 0, cx, cy);
+}
+
+void luma_wipe_video_render(void *data, gs_effect_t *effect)
+{
+	struct luma_wipe_info *lwipe = data;
+	obs_transition_video_render(lwipe->source, luma_wipe_callback);
+	UNUSED_PARAMETER(effect);
+}
+
+static float mix_a(void *data, float t)
+{
+	UNUSED_PARAMETER(data);
+	return 1.0f - t;
+}
+
+static float mix_b(void *data, float t)
+{
+	UNUSED_PARAMETER(data);
+	return t;
+}
+
+bool luma_wipe_audio_render(void *data, uint64_t *ts_out,
+		struct obs_source_audio_mix *audio, uint32_t mixers,
+		size_t channels, size_t sample_rate)
+{
+	struct luma_wipe_info *lwipe = data;
+	return obs_transition_audio_render(lwipe->source, ts_out, audio, mixers,
+				channels, sample_rate, mix_a, mix_b);
+}
+
+struct obs_source_info luma_wipe_transition = {
+	.id                             = "wipe_transition",
+	.type                           = OBS_SOURCE_TYPE_TRANSITION,
+	.get_name                       = luma_wipe_get_name,
+	.create                         = luma_wipe_create,
+	.destroy                        = luma_wipe_destroy,
+	.update	                        = luma_wipe_update,
+	.video_render                   = luma_wipe_video_render,
+	.audio_render                   = luma_wipe_audio_render,
+	.get_properties                 = luma_wipe_properties,
+	.get_defaults                   = luma_wipe_defaults
+};