added pix_2pdp

svn path=/trunk/externals/gem2pdp/; revision=3202

1 files changed, 106 insertions, 0 deletions

diff --git a/pix_2pdp.cpp b/pix_2pdp.cpp
new file mode 100755
index 0000000..2fb8903
--- /dev/null
+++ b/pix_2pdp.cpp
@@ -0,0 +1,106 @@
+/*
+ *  pix_2pdp : pix to pdp bridge
+ *
+ *  Capture the contents of the Gem pix and transform it to a PDP Packet whenever a bang is received
+ *
+ *  Based on code of gem2pdp by Yves Degoyon
+ *  Many thanks to IOhannes M Zmölnig
+ *
+ *  Copyright (c) 2005 Georg Holzmann <grh@mur.at>
+ *
+ */
+
+#include "pix_2pdp.h"
+#include "yuv.h"
+
+CPPEXTERN_NEW(pix_2pdp)
+
+pix_2pdp::pix_2pdp(void)
+{
+  gem_image = NULL;
+  m_pdpoutlet = outlet_new(this->x_obj, &s_anything);
+}
+
+pix_2pdp::~pix_2pdp()
+{
+  gem_image = NULL;
+  gem_xsize = 0;
+  gem_ysize = 0;
+  gem_csize = 0;
+}
+
+// Image processing
+void pix_2pdp::processImage(imageStruct &image)
+{
+  gem_image = image.data;
+  gem_xsize = image.xsize;
+  gem_ysize = image.ysize;
+  gem_csize = image.csize;
+  gem_format = image.format;
+}
+
+// pdp processing
+void pix_2pdp::bangMess()
+{
+  t_int psize, px, py;
+  short int *pY, *pU, *pV;
+  unsigned char r,g,b;
+  t_int helper;
+
+  if(gem_image)
+  {
+    if(gem_format == GL_RGBA)
+    {
+      // make pdp packet
+      psize = gem_xsize * gem_ysize;
+      m_packet0 = pdp_packet_new_image_YCrCb( gem_xsize, gem_ysize);
+      m_header = pdp_packet_header(m_packet0);
+      m_data = (short int *)pdp_packet_data(m_packet0);
+
+      pY = m_data;
+      pV = m_data+psize;
+      pU = m_data+psize+(psize>>2);
+  
+      for ( py=0; py<gem_ysize; py++)
+      {
+        for ( px=0; px<gem_xsize; px++)
+        {
+          // the way to access the pixels: (C=chRed, chBlue, ...)
+          // image[Y * xsize * csize + X * csize + C]
+          helper = py*gem_xsize*gem_csize + px*gem_csize;
+          r=gem_image[helper+chRed];
+          g=gem_image[helper+chGreen];
+          b=gem_image[helper+chBlue];
+          
+          *(pY) = yuv_RGBtoY( (r<<16) +  (g<<8) +  b ) << 7;
+          *(pV) = ( yuv_RGBtoV( (r<<16) +  (g<<8) +  b ) - 128 ) << 8;
+          *(pU) = ( yuv_RGBtoU( (r<<16) +  (g<<8) +  b ) - 128 ) << 8;
+          pY++;
+          if ( (px%2==0) && (py%2==0) )
+          {
+            pV++; pU++;
+          }
+        }
+      }
+
+      pdp_packet_pass_if_valid(m_pdpoutlet, &m_packet0);
+
+    }
+    else
+    {
+      post( "pix_2pdp: Sorry, Gem-input RGB only for now!" );
+    }
+  }
+}
+
+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>" );
+  class_addmethod(classPtr, (t_method)&pix_2pdp::bangMessCallback,
+    	    gensym("bang"), A_NULL);
+}
+
+void pix_2pdp::bangMessCallback(void *data)
+{
+  GetMyClass(data)->bangMess();
+}