Filter SDK/GradientMask - Revision history

Admin: spelling

2016-12-23T16:55:22Z

spelling

Raffriff42: added Category:FilterSDK

2015-06-07T02:40:20Z

added Category:FilterSDK

Raffriff42: Undo revision 5707 by Raffriff42 (talk)

2015-06-07T02:39:56Z

Undo revision 5707 by Raffriff42 (talk)

Raffriff42: added Category:AviSynth_Development

2015-06-07T02:38:15Z

added Category:AviSynth_Development

Admin at 14:45, 6 June 2015

2015-06-06T14:45:23Z

Admin at 14:32, 6 June 2015

2015-06-06T14:32:43Z

Admin at 17:53, 5 June 2015

2015-06-05T17:53:58Z

Admin at 17:52, 5 June 2015

2015-06-05T17:52:57Z

Admin at 17:51, 5 June 2015

2015-06-05T17:51:09Z

Admin: /* Line by line breakdown */

2015-06-05T17:49:08Z

‎Line by line breakdown

@@ Line 164: / Line 164: @@
     fheight = frame->GetHeight(); // in pixels
-The gradients runs from the fully saturated color ((red,green,blue; for i=0) to white ((255,255,255) for i=fwidht):
+The gradients runs from the fully saturated color ((red,green,blue; for i=0) to white ((255,255,255) for i=fwidth):
     for (y=0; y<fheight; y++) {

← Older revision		Revision as of 02:40, 7 June 2015
Line 191:		Line 191:
	return "GradientMask sample plugin";		return "GradientMask sample plugin";
	}		}
		+	[[Category:FilterSDK]]

← Older revision		Revision as of 02:39, 7 June 2015
Line 191:		Line 191:
	return "GradientMask sample plugin";		return "GradientMask sample plugin";
	}		}
−
−	~~[[Category:AviSynth_Development]]~~

← Older revision		Revision as of 02:38, 7 June 2015
Line 191:		Line 191:
	return "GradientMask sample plugin";		return "GradientMask sample plugin";
	}		}
		+
		+	[[Category:AviSynth_Development]]

@@ Line 74: / Line 74: @@
     return "GradientMask sample plugin";
+  }
 === Line by line breakdown ===

@@ Line 22: / Line 22: @@
   };
-  GradientMask::GradientMask(int _w, int _h, const char* _pixel_type, int _color, IScriptEnvironment* env) :
+  GradientMask::GradientMask(int _w, int _h, int _color, IScriptEnvironment* env) :
                              w(_w), h(_h), color(_color) {
     memset(&vi, 0, sizeof(VideoInfo));
@@ Line 37: / Line 37: @@
     BYTE* p;
     int fpitch, fheight, fwidth;
-    int red, green, blue;
+    float red, green, blue, luma;
     static const int col[] = {(color >> 16) & 0xff, (color >> 8) & 0xff, (color >> 0) & 0xff};
-    float luma = float((col[0]+col[1]+col[2])/3.0);
+    luma = float((col[0]+col[1]+col[2])/3.0);
-    blue = max(col[2] - luma,0)
+    blue = max(col[2] - luma,0);
-    green = max(col[1] - luma,0)
+    green = max(col[1] - luma,0);
-    red = max(col[0] - luma,0)
+    red = max(col[0] - luma,0);
     p = frame->GetWritePtr();
@@ Line 142: / Line 142: @@
     BYTE* p;
     int fpitch, fheight, fwidth;
-    int red, green, blue;
+    float red, green, blue, luma;
     static const int col[] = {(color >> 16) & 0xff, (color >> 8) & 0xff, (color >> 0) & 0xff};
-    float luma = float((col[0]+col[1]+col[2])/3.0);
+    luma = float((col[0]+col[1]+col[2])/3.0);
-    blue = max(col[2] - luma,0)
+    blue = max(col[2] - luma,0);
-    green = max(col[1] - luma,0)
+    green = max(col[1] - luma,0);
-    red = max(col[0] - luma,0)
+    red = max(col[0] - luma,0);
 First we calculate the luma (being the average of the color components and subtract it from the color components. So we get the fully saturated color.

@@ Line 132: / Line 132: @@
     vi.pixel_type = VideoInfo::CS_BGR24;
-First memory is allocated for VideoInfo and the video parameters of vi are filled. In our example, the width and height are taken from the input parameters and the remaining ones are given default values. So an one-frame RGB24 gradient will be returned with width 'w' and height 'h'.
+First memory is allocated for VideoInfo and then the video parameters of vi are filled. In our example, the width and height are taken from the input parameters and the remaining ones are given default values. So an one-frame RGB24 gradient will be returned with width 'w' and height 'h'.
 In our example, the frame is filled here in the constructor since the clip consists of only one frame.

@@ Line 8: / Line 8: @@
   class GradientMask : public IClip {
   public:
-    GradientMask(int _w, int _h, const char* _pixel_type, int _color, IScriptEnvironment* env);
+    GradientMask(int _w, int _h, int _color, IScriptEnvironment* env);
     PVideoFrame __stdcall GetFrame(int n, IScriptEnvironment* env);
     void __stdcall GetAudio(void* buf, __int64 start, __int64 count, IScriptEnvironment* env) {};
@@ Line 17: / Line 17: @@
     int w;
     int h;
     int color;
     VideoInfo vi;
@@ Line 24: / Line 23: @@
   GradientMask::GradientMask(int _w, int _h, const char* _pixel_type, int _color, IScriptEnvironment* env) :
-                             w(_w), h(_h), pixel_type(_pixel_type), color(_color) {
+                             w(_w), h(_h), color(_color) {
     memset(&vi, 0, sizeof(VideoInfo));
     vi.width = w;
@@ Line 31: / Line 30: @@
     vi.fps_denominator = 1001;
     vi.num_frames = 1;
-    if (lstrcmpi(pixel_type, "RGB") == 0) {
+    vi.pixel_type = VideoInfo::CS_BGR24;
-     vi.pixel_type = VideoInfo::CS_BGR24;
-   } else {
-     env->ThrowError("GradientMask: pixel_type must be \"RGB\"");
-−
-−
-   if (color > 0xffffff) {
-     env->ThrowError("GradientMask: color must be between 0 and %d($ffffff)", 0xffffff);
-−
     frame = env->NewVideoFrame(vi);
@@ Line 61: / Line 50: @@
     fwidth = frame->GetRowSize(); // in bytes
     fheight = frame->GetHeight(); // in pixels
     for (y=0; y<fheight; y++) {
       for (i=0; i<fwidth; i+=3) {
@@ Line 74: / Line 64: @@
   static AVSValue __cdecl Create_GradientMask(AVSValue args, void* user_data, IScriptEnvironment* env) {
-    return new GradientMask(args[0].AsInt(640), args[1].AsInt(480), args[2].AsString("RGB"), args[3].AsInt(0), env);
+    return new GradientMask(args[0].AsInt(640), args[1].AsInt(480), args[2].AsInt(0), env);
+  }
@@ Line 81: / Line 71: @@
   extern "C" __declspec(dllexport) const char* __stdcall AvisynthPluginInit3(IScriptEnvironment* env, const AVS_Linkage* const vectors) {
     AVS_linkage = vectors;
-    env->AddFunction("GradientMask", "[width]i[height]i[pixel_type]s[color]i", Create_GradientMask, 0);
+    env->AddFunction("GradientMask", "[width]i[height]i[color]i", Create_GradientMask, 0);
     return "GradientMask sample plugin";
+  }
@@ Line 143: / Line 133: @@
 First memory is allocated for VideoInfo and the video parameters of vi are filled. In our example, the width and height are taken from the input parameters and the remaining ones are given default values. So an one-frame RGB24 gradient will be returned with width 'w' and height 'h'.
 In our example, the frame is filled here in the constructor since the clip consists of only one frame.
@@ Line 191: / Line 175: @@
   static AVSValue __cdecl Create_GradientMask(AVSValue args, void* user_data, IScriptEnvironment* env) {
-    return new GradientMask(args[0].AsInt(640), args[1].AsInt(480), args[2].AsString("RGB"), args[3].AsInt(0), env);
+    return new GradientMask(args[0].AsInt(640), args[1].AsInt(480), args[2].AsInt(0), env);
+  }