sdl hacks

[melted] / src / framework / mlt_frame.c

diff --git a/src/framework/mlt_frame.c b/src/framework/mlt_frame.c
index c0d75d6..3221f40 100644 (file)
--- a/src/framework/mlt_frame.c
+++ b/src/framework/mlt_frame.c
@@ -21,6 +21,7 @@
 #include "config.h"
 #include "mlt_frame.h"
 #include "mlt_producer.h"
+#include "mlt_factory.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -36,7 +37,7 @@ mlt_frame mlt_frame_init( )
        if ( this != NULL )
        {
                // Get the normalisation
-               char *normalisation = getenv( "MLT_NORMALISATION" );
+               char *normalisation = mlt_environment( "MLT_NORMALISATION" );
 
                // Initialise the properties
                mlt_properties properties = &this->parent;
@@ -592,9 +593,6 @@ uint8_t *mlt_frame_rescale_yuv422( mlt_frame this, int owidth, int oheight )
 
                iwidth = iwidth - ( iwidth % 4 );
 
-       // Coordinates (0,0 is middle of output)
-       int y, x;
-
                // Derived coordinates
                int dy, dx;
 
@@ -605,41 +603,44 @@ uint8_t *mlt_frame_rescale_yuv422( mlt_frame this, int owidth, int oheight )
        int in_y_range = iheight / 2;
 
        // Output pointers
-       uint8_t *out_line = output;
-       uint8_t *out_ptr;
+       register uint8_t *out_line = output;
+       register uint8_t *out_ptr;
 
        // Calculate a middle pointer
        uint8_t *in_middle = input + istride * in_y_range + in_x_range * 2;
        uint8_t *in_line;
-               uint8_t *in_ptr;
 
                // Generate the affine transform scaling values
-               int scale_width = ( iwidth << 16 ) / owidth;
-               int scale_height = ( iheight << 16 ) / oheight;
+               register int scale_width = ( iwidth << 16 ) / owidth;
+               register int scale_height = ( iheight << 16 ) / oheight;
+               register int base = 0;
+
+               int outer = out_x_range * scale_width;
+               int bottom = out_y_range * scale_height;
 
        // Loop for the entirety of our output height.
-       for ( y = - out_y_range; y < out_y_range ; y ++ )
+       for ( dy = - bottom; dy < bottom; dy += scale_height )
        {
-                       // Calculate the derived y value
-                       dy = ( scale_height * y ) >> 16;
-
                // Start at the beginning of the line
                out_ptr = out_line;
        
                // Pointer to the middle of the input line
-               in_line = in_middle + dy * istride;
-       
+               in_line = in_middle + ( dy >> 16 ) * istride;
+
                // Loop for the entirety of our output row.
-               for ( x = - out_x_range; x < out_x_range; x += 1 )
+               for ( dx = - outer; dx < outer; dx += scale_width )
                {
-                               // Calculated the derived x
-                               dx = ( scale_width * x ) >> 16;
-
-                       // We're in the input range for this row.
-                               in_ptr = in_line + ( dx << 1 );
-                       *out_ptr ++ = *in_ptr ++;
-                               in_ptr = in_line + ( ( dx >> 1 ) << 2 ) + ( ( x & 1 ) << 1 ) + 1;
-                       *out_ptr ++ = *in_ptr;
+                               base = dx >> 15;
+                               base &= 0xfffffffe;
+                               *out_ptr ++ = *( in_line + base );
+                               base &= 0xfffffffc;
+                               *out_ptr ++ = *( in_line + base + 1 );
+                               dx += scale_width;
+                               base = dx >> 15;
+                               base &= 0xfffffffe;
+                               *out_ptr ++ = *( in_line + base );
+                               base &= 0xfffffffc;
+                               *out_ptr ++ = *( in_line + base + 3 );
                }
 
                // Move to next output line