add vhs shader and mimic layout of GLSL repo

vhs/ntsc-vcr.slangp

@@ -1,15 +1,13 @@
-shaders = 6
-shader0 = shaders/ntsc-pass1-composite-3phase.slang
-shader1 = shaders/ntsc-pass2-3phase.slang
-shader2 = shaders/ntsc-stock.slang
-shader3 = shaders/ntsc-stock.slang
-shader4 = shaders/ntsc-vcr/loose-connection.slang
-shader5 = ../misc/image-adjustment.slang
+shaders = 5
+shader0 = ../ntsc/shaders/ntsc-pass1-composite-3phase.slang
+shader1 = ../ntsc/shaders/ntsc-pass2-3phase.slang
+shader2 = ../ntsc/shaders/ntsc-stock.slang
+shader3 = shaders/static.slang
+shader4 = ../misc/image-adjustment.slang
 
 filter_linear0 = false
 filter_linear1 = false
 filter_linear2 = false
-filter_linear3 = true 
 
 scale_type0 = source
 scale_x0 = 4.0
@@ -25,7 +23,7 @@ scale_type_x2 = source
 scale_type_y2 = viewport
 scale2 = 1.0
 
-scale_type4 = source
+scale_type3 = source
 scale4 = 1.0
 
 parameters = "GRAIN_STR;luminance;bright_boost;target_gamma;saturation"
@@ -35,5 +33,5 @@ bright_boost = 0.10
 target_gamma = 3.50
 saturation = 0.70
 
-textures = "overlay"
-overlay = shaders/ntsc-vcr/vcr-overlay.png
+textures = "play"
+play = resources/play.png

vhs/shaders/static.slang

@@ -22,8 +22,6 @@ layout(push_constant) uniform Push
 #pragma parameter magnitude "Distortion Magnitude" 0.9 0.0 25.0 0.1
 #pragma parameter always_on "OSD Always On" 0.0 0.0 1.0 1.0
 
-#define framecount vec2(params.FrameCount, params.FrameCount).x
-
 layout(std140, set = 0, binding = 0) uniform UBO
 {
 	mat4 MVP;
@@ -65,7 +63,7 @@ float n( in vec3 x ){
 }
 
 //tape noise
-float nn(vec2 p){
+float nn(vec2 p, float framecount){
 
 
     float y = p.y;
@@ -83,7 +81,7 @@ float nn(vec2 p){
     return v;
 }
 
-vec3 distort(sampler2D tex, vec2 uv, float magnitude){
+vec3 distort(sampler2D tex, vec2 uv, float magnitude, float framecount){
 	float mag = params.magnitude * 0.0001;
 
 	vec2 offset_x = vec2(uv.x);
@@ -95,17 +93,17 @@ vec3 distort(sampler2D tex, vec2 uv, float magnitude){
 				texture(tex, uv).b);
 }
 
-float onOff(float a, float b, float c)
+float onOff(float a, float b, float c, float framecount)
 {
 	return step(c, sin((framecount * 0.001) + a*cos((framecount * 0.001)*b)));
 }
 
-vec2 jumpy(vec2 uv)
+vec2 jumpy(vec2 uv, float framecount)
 {
 	vec2 look = uv;
 	float window = 1./(1.+80.*(look.y-mod(framecount/4.,1.))*(look.y-mod(framecount/4.,1.)));
-	look.x += 0.05 * sin(look.y*10. + framecount)/20.*onOff(4.,4.,.3)*(0.5+cos(framecount*20.))*window;
-	float vShift = 0.4*onOff(2.,3.,.9)*(sin(framecount)*sin(framecount*20.) + 
+	look.x += 0.05 * sin(look.y*10. + framecount)/20.*onOff(4.,4.,.3, framecount)*(0.5+cos(framecount*20.))*window;
+	float vShift = 0.4*onOff(2.,3.,.9, framecount)*(sin(framecount)*sin(framecount*20.) + 
 										 (0.5 + 0.1*sin(framecount*200.)*cos(framecount)));
 	look.y = mod(look.y - 0.01 * vShift, 1.);
 	return look;
@@ -126,18 +124,18 @@ void main()
 layout(location = 0) in vec2 vTexCoord;
 layout(location = 0) out vec4 FragColor;
 layout(set = 0, binding = 2) uniform sampler2D Source;
-layout(set = 0, binding = 3) uniform sampler2D overlay;
+layout(set = 0, binding = 3) uniform sampler2D play;
 
 void main()
 {
-float timer = vec2(params.FrameCount, params.FrameCount).x;
-vec3 res = distort(Source, jumpy(vTexCoord), params.magnitude);
-float col = nn(-vTexCoord * params.SourceSize.y * 4.0);
-vec3 play = distort(overlay, jumpy(vTexCoord), params.magnitude);
-float overlay_alpha = texture(overlay, jumpy(vTexCoord)).a;
-float show_overlay = (mod(timer, 100.0) < 50.0) && (timer < 500.0) ? texture(overlay, jumpy(vTexCoord)).a : 0.0;
-show_overlay = clamp(show_overlay + params.always_on * overlay_alpha, 0.0, 1.0);
-res = mix(res, play, show_overlay);
+	float timer = float(params.FrameCount);
+	vec3 res = distort(Source, jumpy(vTexCoord, timer), params.magnitude, timer);
+	float col = nn(-vTexCoord * params.SourceSize.y * 4.0, timer);
+	vec3 play_osd = distort(play, jumpy(vTexCoord, timer), params.magnitude, timer);
+	float overlay_alpha = texture(play, jumpy(vTexCoord, timer)).a;
+	float show_overlay = (mod(timer, 100.0) < 50.0) && (timer < 500.0) ? texture(play, jumpy(vTexCoord, timer)).a : 0.0;
+	show_overlay = clamp(show_overlay + params.always_on * overlay_alpha, 0.0, 1.0);
+	res = mix(res, play_osd, show_overlay);
 
 	FragColor = vec4(res + clamp(vec3(col), 0.0, 0.5), 1.0);
 }

vhs/shaders/vhs.slang

@@ -0,0 +1,169 @@
+#version 450
+
+// VHS shader
+// by hunterk
+// adapted from ompuco's more AVdistortion shadertoy:
+// https://www.shadertoy.com/view/XlsczN
+
+layout(push_constant) uniform Push
+{
+	vec4 SourceSize;
+	vec4 OriginalSize;
+	vec4 OutputSize;
+	uint FrameCount;
+	float wiggle;
+	float smear;
+} params;
+
+#pragma parameter wiggle "Wiggle" 0.0 0.0 10.0 1.0
+#pragma parameter smear "Chroma Smear" 0.5 0.0 1.0 0.05
+
+#define wiggle params.wiggle
+#define smear params.smear
+#define FrameCount params.FrameCount
+
+layout(std140, set = 0, binding = 0) uniform UBO
+{
+	mat4 MVP;
+} global;
+
+#pragma stage vertex
+layout(location = 0) in vec4 Position;
+layout(location = 1) in vec2 TexCoord;
+layout(location = 0) out vec2 vTexCoord;
+
+void main()
+{
+   gl_Position = global.MVP * Position;
+   vTexCoord = TexCoord;
+}
+
+#pragma stage fragment
+layout(location = 0) in vec2 vTexCoord;
+layout(location = 0) out vec4 FragColor;
+layout(set = 0, binding = 2) uniform sampler2D Source;
+
+#define iTime mod(float(FrameCount), 7.0)
+#define iChannel0 Source
+
+//YIQ/RGB shit
+vec3 rgb2yiq(vec3 c){   
+	return vec3(
+		(0.2989*c.x + 0.5959*c.y + 0.2115*c.z),
+		(0.5870*c.x - 0.2744*c.y - 0.5229*c.z),
+		(0.1140*c.x - 0.3216*c.y + 0.3114*c.z)
+	);
+}
+
+vec3 yiq2rgb(vec3 c){				
+	return vec3(
+		(1.0*c.x	+ 1.0*c.y	+ 1.0*c.z),
+		(0.956*c.x	- 0.2720*c.y	- 1.1060*c.z),
+		(0.6210*c.x	- 0.6474*c.y	+ 1.7046*c.z)
+	);
+}
+        
+vec2 Circle(float Start, float Points, float Point) 
+{
+	float Rad = (3.141592 * 2.0 * (1.0 / Points)) * (Point + Start);
+	//return vec2(sin(Rad), cos(Rad));
+		return vec2(-(.3+Rad), cos(Rad));
+
+}
+
+vec3 Blur(vec2 uv, float d){
+	float t = (sin(iTime*5.0+uv.y*5.0))/10.0;
+    float b = 1.0;
+    t=0.0;
+    vec2 PixelOffset=vec2(d+.0005*t,0);
+    
+    float Start = 2.0 / 14.0;
+    vec2 Scale = 0.66 * 4.0 * 2.0 * PixelOffset.xy;
+    
+    vec3 N0 = texture(iChannel0, uv + Circle(Start, 14.0, 0.0) * Scale).rgb;
+    vec3 N1 = texture(iChannel0, uv + Circle(Start, 14.0, 1.0) * Scale).rgb;
+    vec3 N2 = texture(iChannel0, uv + Circle(Start, 14.0, 2.0) * Scale).rgb;
+    vec3 N3 = texture(iChannel0, uv + Circle(Start, 14.0, 3.0) * Scale).rgb;
+    vec3 N4 = texture(iChannel0, uv + Circle(Start, 14.0, 4.0) * Scale).rgb;
+    vec3 N5 = texture(iChannel0, uv + Circle(Start, 14.0, 5.0) * Scale).rgb;
+    vec3 N6 = texture(iChannel0, uv + Circle(Start, 14.0, 6.0) * Scale).rgb;
+    vec3 N7 = texture(iChannel0, uv + Circle(Start, 14.0, 7.0) * Scale).rgb;
+    vec3 N8 = texture(iChannel0, uv + Circle(Start, 14.0, 8.0) * Scale).rgb;
+    vec3 N9 = texture(iChannel0, uv + Circle(Start, 14.0, 9.0) * Scale).rgb;
+    vec3 N10 = texture(iChannel0, uv + Circle(Start, 14.0, 10.0) * Scale).rgb;
+    vec3 N11 = texture(iChannel0, uv + Circle(Start, 14.0, 11.0) * Scale).rgb;
+    vec3 N12 = texture(iChannel0, uv + Circle(Start, 14.0, 12.0) * Scale).rgb;
+    vec3 N13 = texture(iChannel0, uv + Circle(Start, 14.0, 13.0) * Scale).rgb;
+    vec3 N14 = texture(iChannel0, uv).rgb;
+    
+	vec4 clr = texture(iChannel0, uv);
+    float W = 1.0 / 15.0;
+    
+    clr.rgb= 
+		(N0 * W) +
+		(N1 * W) +
+		(N2 * W) +
+		(N3 * W) +
+		(N4 * W) +
+		(N5 * W) +
+		(N6 * W) +
+		(N7 * W) +
+		(N8 * W) +
+		(N9 * W) +
+		(N10 * W) +
+		(N11 * W) +
+		(N12 * W) +
+		(N13 * W) +
+		(N14 * W);
+    return  vec3(clr.xyz)*b;
+}
+
+float onOff(float a, float b, float c, float framecount)
+{
+	return step(c, sin((framecount * 0.001) + a*cos((framecount * 0.001)*b)));
+}
+
+vec2 jumpy(vec2 uv, float framecount)
+{
+	vec2 look = uv;
+	float window = 1./(1.+80.*(look.y-mod(framecount/4.,1.))*(look.y-mod(framecount/4.,1.)));
+	look.x += 0.05 * sin(look.y*10. + framecount)/20.*onOff(4.,4.,.3, framecount)*(0.5+cos(framecount*20.))*window;
+	float vShift = (0.1*wiggle) * 0.4*onOff(2.,3.,.9, framecount)*(sin(framecount)*sin(framecount*20.) + 
+										 (0.5 + 0.1*sin(framecount*200.)*cos(framecount)));
+	look.y = mod(look.y - 0.01 * vShift, 1.);
+	return look;
+}
+
+void main()
+{
+	float d = .1-round(mod(iTime/3.0,1.0))*.1;
+	vec2 uv = jumpy(vTexCoord.xy, iTime);
+	vec2 uv2 = uv;
+
+	float s = 0.0001 * -d + 0.0001 * wiggle * sin(iTime);
+   
+	float e = min(.30,pow(max(0.0,cos(uv.y*4.0+.3)-.75)*(s+0.5)*1.0,3.0))*25.0;
+	float r = (iTime*(2.0*s));
+	uv.x += abs(r*pow(min(.003,(-uv.y+(.01*mod(iTime, 17.0))))*3.0,2.0));
+    
+	d = .051+abs(sin(s/4.0));
+	float c = max(0.0001,.002*d) * smear;
+	vec2 uvo = uv;
+	vec4 final;
+	final.xyz =Blur(uv,c+c*(uv.x));
+	float y = rgb2yiq(final.xyz).r;
+    
+	uv.x += .01*d;
+	c *= 6.0;
+	final.xyz =Blur(uv,c);
+	float i = rgb2yiq(final.xyz).g;
+    
+	uv.x += .005*d;
+    
+	c *= 2.50;
+	final.xyz =Blur(uv,c);
+	float q = rgb2yiq(final.xyz).b;
+	final = vec4(yiq2rgb(vec3(y,i,q))-pow(s+e*2.0,3.0), 1.0);
+	
+	FragColor = final;
+}

vhs/vhs.slangp

@@ -0,0 +1,4 @@
+shaders = 1
+
+shader0 = shaders/vhs.slang
+filter_linear0 = true