From 824260b5ebdff16546c0f55b637b198ab2e5df0c Mon Sep 17 00:00:00 2001
From: Jamie Tittle <tigital@users.sourceforge.net>
Date: Tue, 11 Oct 2005 02:37:22 +0000
Subject: improved uyvy to yv12 conversion code

svn path=/trunk/externals/gem2pdp/; revision=3690
---
 pix_2pdp.cpp | 55 +++++++++++++++++++++++++++++++------------------------
 1 file changed, 31 insertions(+), 24 deletions(-)

diff --git a/pix_2pdp.cpp b/pix_2pdp.cpp
index 34d0a12..f8743f2 100755
--- a/pix_2pdp.cpp
+++ b/pix_2pdp.cpp
@@ -7,6 +7,7 @@
  *  Many thanks to IOhannes M Zmölnig
  *
  *  Copyright (c) 2005 Georg Holzmann <grh@mur.at>
+ *  parts Copyright (c) 2005 James Tittle II <tigital@mac.com>
  *
  */
 
@@ -43,7 +44,7 @@ void pix_2pdp::processImage(imageStruct &image)
 void pix_2pdp::bangMess()
 {
   t_int psize, px, py;
-  short int *pY, *pU, *pV;
+  short int *pY, *pY2, *pU, *pV;
   unsigned char g1,g2,g3,g4;
   t_int helper;
 
@@ -56,6 +57,7 @@ void pix_2pdp::bangMess()
     m_data = (short int *)pdp_packet_data(m_packet0);
 
     pY = m_data;
+	pY2 = m_data + gem_xsize;
     pV = m_data+psize;
     pU = m_data+psize+(psize>>2);
     
@@ -64,6 +66,8 @@ void pix_2pdp::bangMess()
       // RGB
       case GL_RGB:
       case GL_RGBA:
+	  case GL_BGR:
+	  case GL_BGRA:
         for ( py=0; py<gem_ysize; py++)
         {
           for ( px=0; px<gem_xsize; px++)
@@ -88,28 +92,31 @@ void pix_2pdp::bangMess()
         
       // YUV
       case GL_YUV422_GEM:
-        for ( py=0; py<gem_ysize; py++)
-        {
-          for ( px=0; px<gem_xsize; px++)
-          {
-            helper = py*gem_xsize*gem_csize + px*gem_csize;
-            g1=gem_image[helper+chU];  // U
-            g2=gem_image[helper+chY0]; // Y0
-            g3=gem_image[helper+chV];  // V
-            g4=gem_image[helper+chY1]; // Y1
-            
-            if(px%2==0)
-              *pY = g2 << 7;
-            else
-              *pY = g4 << 7;
-            pY++;
-            
-            *pU = (g1-128) << 8;
-            *pV = (g3-128) << 8;
-            if ( (px%2==0) && (py%2==0) )
-              pV++; pU++;
-          }
-        }
+	    int row=gem_ysize>>1;
+		int cols=gem_xsize>>1;
+		short u,v;
+		unsigned char *pixel = gem_image;
+		unsigned char *pixel2 = gem_image + gem_xsize * gem_csize;
+		while (row--){
+		  int col=cols;
+		  while(col--){
+				u=(pixel[0]-128)<<8; v=(pixel[2]-128)<<8;
+				*pU = u;
+				*pY++ = (pixel[1])<<7;
+				*pV = v;
+				*pY++ = (pixel[3])<<7;
+				*pU = u;
+				*pY2++ = (pixel2[1])<<7;
+				*pV = v;
+				*pY2++ = (pixel2[3])<<7;
+				pixel+=4;
+				pixel2+=4;
+				pU++; pV++;
+		  }
+			pixel += gem_xsize * gem_csize;
+			pixel2 += gem_xsize * gem_csize;
+			pY += gem_xsize; pY2 += gem_xsize;
+		}
         pdp_packet_pass_if_valid(m_pdpoutlet, &m_packet0);
         break;
       
@@ -139,7 +146,7 @@ void pix_2pdp::bangMess()
 
 void pix_2pdp::obj_setupCallback(t_class *classPtr)
 {
-  post( "pix_2pdp : a bridge between a Gem pix and PDP/PiDiP, Georg Holzmann 2005 <grh@mur.at>" );
+  post( "pix_2pdp : a bridge between a Gem pix and PDP/PiDiP, Georg Holzmann 2005 <grh@mur.at> & tigital 2005 <tigital@mac.com>" );
   class_addmethod(classPtr, (t_method)&pix_2pdp::bangMessCallback,
     	    gensym("bang"), A_NULL);
 }
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