Initial WebM release

4 files changed, 1713 insertions, 0 deletions

diff --git a/vpx_scale/leapster/doptsystemdependant_lf.c b/vpx_scale/leapster/doptsystemdependant_lf.c
new file mode 100644
index 000000000..ca1316730
--- /dev/null
+++ b/vpx_scale/leapster/doptsystemdependant_lf.c
@@ -0,0 +1,71 @@
+/*
+ *  Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license and patent
+ *  grant that can be found in the LICENSE file in the root of the source
+ *  tree. All contributing project authors may be found in the AUTHORS
+ *  file in the root of the source tree.
+ */
+
+
+/****************************************************************************
+*
+*   Module Title :     system_dependant.c
+*
+*   Description  :     Miscellaneous system dependant functions
+*
+****************************************************************************/
+
+/****************************************************************************
+*  Header Files
+****************************************************************************/
+#include "vpx_scale/vpxscale.h"
+
+/****************************************************************************
+*  Imports
+*****************************************************************************/
+extern int register_generic_scalers(void);
+extern int de_register_generic_scalers(void);
+
+/****************************************************************************
+ *
+ *  ROUTINE       : vp8_scale_machine_specific_config
+ *
+ *  INPUTS        : UINT32 Version : Codec version number.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : int
+ *
+ *  FUNCTION      : Checks for machine specifc features such as MMX support
+ *                  sets appropriate flags and function pointers.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+int
+vp8_scale_machine_specific_config()
+{
+    return register_generic_scalers();
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : vp8_scale_machine_specific_config
+ *
+ *  INPUTS        : UINT32 Version : Codec version number.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : int
+ *
+ *  FUNCTION      : Resets the funtion pointers and deallocates memory.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+int
+scale_machine_specific_de_config()
+{
+    return de_register_generic_scalers();
+}
diff --git a/vpx_scale/leapster/gen_scalers_lf.c b/vpx_scale/leapster/gen_scalers_lf.c
new file mode 100644
index 000000000..1b9c7c745
--- /dev/null
+++ b/vpx_scale/leapster/gen_scalers_lf.c
@@ -0,0 +1,521 @@
+/*
+ *  Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license and patent
+ *  grant that can be found in the LICENSE file in the root of the source
+ *  tree. All contributing project authors may be found in the AUTHORS
+ *  file in the root of the source tree.
+ */
+
+
+/****************************************************************************
+ *
+ *   Module Title :     gen_scalers.c
+ *
+ *   Description  :     Generic image scaling functions.
+ *
+ ***************************************************************************/
+
+/****************************************************************************
+*  Header Files
+****************************************************************************/
+#include "vpx_scale/vpxscale.h"
+
+/****************************************************************************
+*  Imports
+****************************************************************************/
+
+/****************************************************************************
+ *
+ *  ROUTINE       : vp8cx_horizontal_line_4_5_scale_c
+ *
+ *  INPUTS        : const unsigned char *source : Pointer to source data.
+ *                  unsigned int source_width    : Stride of source.
+ *                  unsigned char *dest         : Pointer to destination data.
+ *                  unsigned int dest_width      : Stride of destination (NOT USED).
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Copies horizontal line of pixels from source to
+ *                  destination scaling up by 4 to 5.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+static
+void vp8cx_horizontal_line_4_5_scale_c
+(
+    const unsigned char *source,
+    unsigned int source_width,
+    unsigned char *dest,
+    unsigned int dest_width
+)
+{
+    unsigned i;
+    unsigned int a, b, c;
+    unsigned char *des = dest;
+    const unsigned char *src = source;
+
+    (void) dest_width;
+
+    for (i = 0; i < source_width - 4; i += 4)
+    {
+        a = src[0];
+        b = src[1];
+        des [0] = (unsigned char) a;
+        des [1] = (unsigned char)((a * 51 + 205 * b + 128) >> 8);
+        c = src[2] * 154;
+        a = src[3];
+        des [2] = (unsigned char)((b * 102 + c + 128) >> 8);
+        des [3] = (unsigned char)((c + 102 * a + 128) >> 8);
+        b = src[4];
+        des [4] = (unsigned char)((a * 205 + 51 * b + 128) >> 8);
+
+        src += 4;
+        des += 5;
+    }
+
+    a = src[0];
+    b = src[1];
+    des [0] = (unsigned char)(a);
+    des [1] = (unsigned char)((a * 51 + 205 * b + 128) >> 8);
+    c = src[2] * 154;
+    a = src[3];
+    des [2] = (unsigned char)((b * 102 + c + 128) >> 8);
+    des [3] = (unsigned char)((c + 102 * a + 128) >> 8);
+    des [4] = (unsigned char)(a);
+
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : vp8cx_vertical_band_4_5_scale_c
+ *
+ *  INPUTS        : unsigned char *dest    : Pointer to destination data.
+ *                  unsigned int dest_pitch : Stride of destination data.
+ *                  unsigned int dest_width : Width of destination data.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Scales vertical band of pixels by scale 4 to 5. The
+ *                  height of the band scaled is 4-pixels.
+ *
+ *  SPECIAL NOTES : The routine uses the first line of the band below
+ *                  the current band.
+ *
+ ****************************************************************************/
+static
+void vp8cx_vertical_band_4_5_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
+{
+    unsigned int i;
+    unsigned int a, b, c, d;
+    unsigned char *des = dest;
+
+    for (i = 0; i < dest_width; i++)
+    {
+        a = des [0];
+        b = des [dest_pitch];
+
+        des[dest_pitch] = (unsigned char)((a * 51 + 205 * b + 128) >> 8);
+
+        c = des[dest_pitch*2] * 154;
+        d = des[dest_pitch*3];
+
+        des [dest_pitch*2] = (unsigned char)((b * 102 + c + 128) >> 8);
+        des [dest_pitch*3] = (unsigned char)((c + 102 * d + 128) >> 8);
+
+        // First line in next band
+        a = des [dest_pitch * 5];
+        des [dest_pitch * 4] = (unsigned char)((d * 205 + 51 * a + 128) >> 8);
+
+        des ++;
+    }
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : vp8cx_last_vertical_band_4_5_scale_c
+ *
+ *  INPUTS        : unsigned char *dest    : Pointer to destination data.
+ *                  unsigned int dest_pitch : Stride of destination data.
+ *                  unsigned int dest_width : Width of destination data.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Scales last vertical band of pixels by scale 4 to 5. The
+ *                  height of the band scaled is 4-pixels.
+ *
+ *  SPECIAL NOTES : The routine does not have available the first line of
+ *                  the band below the current band, since this is the
+ *                  last band.
+ *
+ ****************************************************************************/
+static
+void vp8cx_last_vertical_band_4_5_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
+{
+    unsigned int i;
+    unsigned int a, b, c, d;
+    unsigned char *des = dest;
+
+    for (i = 0; i < dest_width; ++i)
+    {
+        a = des[0];
+        b = des[dest_pitch];
+
+        des[dest_pitch] = (unsigned char)((a * 51 + 205 * b + 128) >> 8);
+
+        c = des[dest_pitch*2] * 154;
+        d = des[dest_pitch*3];
+
+        des [dest_pitch*2] = (unsigned char)((b * 102 + c + 128) >> 8);
+        des [dest_pitch*3] = (unsigned char)((c + 102 * d + 128) >> 8);
+
+        // No other line for interplation of this line, so ..
+        des[dest_pitch*4] = (unsigned char) d;
+
+        des++;
+    }
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : vp8cx_horizontal_line_3_5_scale_c
+ *
+ *  INPUTS        : const unsigned char *source : Pointer to source data.
+ *                  unsigned int source_width    : Stride of source.
+ *                  unsigned char *dest         : Pointer to destination data.
+ *                  unsigned int dest_width      : Stride of destination (NOT USED).
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Copies horizontal line of pixels from source to
+ *                  destination scaling up by 3 to 5.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ *
+ ****************************************************************************/
+static
+void vp8cx_horizontal_line_3_5_scale_c
+(
+    const unsigned char *source,
+    unsigned int source_width,
+    unsigned char *dest,
+    unsigned int dest_width
+)
+{
+    unsigned int i;
+    unsigned int a, b, c;
+    unsigned char *des = dest;
+    const unsigned char *src = source;
+
+    (void) dest_width;
+
+    for (i = 0; i < source_width - 3; i += 3)
+    {
+        a = src[0];
+        b = src[1];
+        des [0] = (unsigned char)(a);
+        des [1] = (unsigned char)((a * 102 + 154 * b + 128) >> 8);
+
+        c = src[2] ;
+        des [2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8);
+        des [3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8);
+
+        a = src[3];
+        des [4] = (unsigned char)((c * 154 + a * 102 + 128) >> 8);
+
+        src += 3;
+        des += 5;
+    }
+
+    a = src[0];
+    b = src[1];
+    des [0] = (unsigned char)(a);
+
+    des [1] = (unsigned char)((a * 102 + 154 * b + 128) >> 8);
+    c = src[2] ;
+    des [2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8);
+    des [3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8);
+
+    des [4] = (unsigned char)(c);
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : vp8cx_vertical_band_3_5_scale_c
+ *
+ *  INPUTS        : unsigned char *dest    : Pointer to destination data.
+ *                  unsigned int dest_pitch : Stride of destination data.
+ *                  unsigned int dest_width : Width of destination data.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Scales vertical band of pixels by scale 3 to 5. The
+ *                  height of the band scaled is 3-pixels.
+ *
+ *  SPECIAL NOTES : The routine uses the first line of the band below
+ *                  the current band.
+ *
+ ****************************************************************************/
+static
+void vp8cx_vertical_band_3_5_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
+{
+    unsigned int i;
+    unsigned int a, b, c;
+    unsigned char *des = dest;
+
+    for (i = 0; i < dest_width; i++)
+    {
+        a = des [0];
+        b = des [dest_pitch];
+        des [dest_pitch] = (unsigned char)((a * 102 + 154 * b + 128) >> 8);
+
+        c = des[dest_pitch*2];
+        des [dest_pitch*2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8);
+        des [dest_pitch*3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8);
+
+        // First line in next band...
+        a = des [dest_pitch * 5];
+        des [dest_pitch * 4] = (unsigned char)((c * 154 + a * 102 + 128) >> 8);
+
+        des++;
+    }
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : vp8cx_last_vertical_band_3_5_scale_c
+ *
+ *  INPUTS        : unsigned char *dest    : Pointer to destination data.
+ *                  unsigned int dest_pitch : Stride of destination data.
+ *                  unsigned int dest_width : Width of destination data.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Scales last vertical band of pixels by scale 3 to 5. The
+ *                  height of the band scaled is 3-pixels.
+ *
+ *  SPECIAL NOTES : The routine does not have available the first line of
+ *                  the band below the current band, since this is the
+ *                  last band.
+ *
+ ****************************************************************************/
+static
+void vp8cx_last_vertical_band_3_5_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
+{
+    unsigned int i;
+    unsigned int a, b, c;
+    unsigned char *des = dest;
+
+    for (i = 0; i < dest_width; ++i)
+    {
+        a = des [0];
+        b = des [dest_pitch];
+
+        des [ dest_pitch ] = (unsigned char)((a * 102 + 154 * b + 128) >> 8);
+
+        c = des[dest_pitch*2];
+        des [dest_pitch*2] = (unsigned char)((b * 205 + c * 51 + 128) >> 8);
+        des [dest_pitch*3] = (unsigned char)((b * 51 + c * 205 + 128) >> 8);
+
+        // No other line for interplation of this line, so ..
+        des [ dest_pitch * 4 ] = (unsigned char)(c) ;
+
+        des++;
+    }
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : vp8cx_horizontal_line_1_2_scale_c
+ *
+ *  INPUTS        : const unsigned char *source : Pointer to source data.
+ *                  unsigned int source_width    : Stride of source.
+ *                  unsigned char *dest         : Pointer to destination data.
+ *                  unsigned int dest_width      : Stride of destination (NOT USED).
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Copies horizontal line of pixels from source to
+ *                  destination scaling up by 1 to 2.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+static
+void vp8cx_horizontal_line_1_2_scale_c
+(
+    const unsigned char *source,
+    unsigned int source_width,
+    unsigned char *dest,
+    unsigned int dest_width
+)
+{
+    unsigned int i;
+    unsigned int a, b;
+    unsigned char *des = dest;
+    const unsigned char *src = source;
+
+    (void) dest_width;
+
+    for (i = 0; i < source_width - 1; i += 1)
+    {
+        a = src[0];
+        b = src[1];
+        des [0] = (unsigned char)(a);
+        des [1] = (unsigned char)((a + b + 1) >> 1);
+        src += 1;
+        des += 2;
+    }
+
+    a = src[0];
+    des [0] = (unsigned char)(a);
+    des [1] = (unsigned char)(a);
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : vp8cx_vertical_band_1_2_scale_c
+ *
+ *  INPUTS        : unsigned char *dest    : Pointer to destination data.
+ *                  unsigned int dest_pitch : Stride of destination data.
+ *                  unsigned int dest_width : Width of destination data.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Scales vertical band of pixels by scale 1 to 2. The
+ *                  height of the band scaled is 1-pixel.
+ *
+ *  SPECIAL NOTES : The routine uses the first line of the band below
+ *                  the current band.
+ *
+ ****************************************************************************/
+static
+void vp8cx_vertical_band_1_2_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
+{
+    unsigned int i;
+    unsigned int a, b;
+    unsigned char *des = dest;
+
+    for (i = 0; i < dest_width; i++)
+    {
+        a = des [0];
+        b = des [dest_pitch * 2];
+
+        des[dest_pitch] = (unsigned char)((a + b + 1) >> 1);
+
+        des++;
+    }
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : vp8cx_last_vertical_band_1_2_scale_c
+ *
+ *  INPUTS        : unsigned char *dest    : Pointer to destination data.
+ *                  unsigned int dest_pitch : Stride of destination data.
+ *                  unsigned int dest_width : Width of destination data.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Scales last vertical band of pixels by scale 1 to 2. The
+ *                  height of the band scaled is 1-pixel.
+ *
+ *  SPECIAL NOTES : The routine does not have available the first line of
+ *                  the band below the current band, since this is the
+ *                  last band.
+ *
+ ****************************************************************************/
+static
+void vp8cx_last_vertical_band_1_2_scale_c(unsigned char *dest, unsigned int dest_pitch, unsigned int dest_width)
+{
+    unsigned int i;
+    unsigned char *des = dest;
+
+    for (i = 0; i < dest_width; ++i)
+    {
+        des[dest_pitch] = des[0];
+        des++;
+    }
+}
+
+#include "vpx_scale/vpxscale.h"
+#include "vpx_mem/vpx_mem.h"
+
+struct vpxglobal_scalling_ptrs_t *g_scaling_ptrs = 0;
+
+int
+register_generic_scalers(void)
+{
+    int rv = 0;
+
+    g_scaling_ptrs = (struct vpxglobal_scalling_ptrs_t *)vpx_malloc(sizeof(struct vpxglobal_scalling_ptrs_t));
+
+    if (g_scaling_ptrs)
+    {
+        g_scaling_ptrs->vpxhorizontal_line_1_2_scale_t        = vp8cx_horizontal_line_1_2_scale_c;
+        g_scaling_ptrs->vpxvertical_band_1_2_scale_t          = vp8cx_vertical_band_1_2_scale_c;
+        g_scaling_ptrs->vpxlast_vertical_band_1_2_scale_t      = vp8cx_last_vertical_band_1_2_scale_c;
+        g_scaling_ptrs->vpxhorizontal_line_3_5_scale_t        = vp8cx_horizontal_line_3_5_scale_c;
+        g_scaling_ptrs->vpxvertical_band_3_5_scale_t          = vp8cx_vertical_band_3_5_scale_c;
+        g_scaling_ptrs->vpxlast_vertical_band_3_5_scale_t      = vp8cx_last_vertical_band_3_5_scale_c;
+        g_scaling_ptrs->vpxhorizontal_line_4_5_scale_t        = vp8cx_horizontal_line_4_5_scale_c;
+        g_scaling_ptrs->vpxvertical_band_4_5_scale_t          = vp8cx_vertical_band_4_5_scale_c;
+        g_scaling_ptrs->vpxlast_vertical_band_4_5_scale_t      = vp8cx_last_vertical_band_4_5_scale_c;
+    }
+    else
+    {
+        rv = -1;
+    }
+
+    /*
+    vp8_horizontal_line_1_2_scale        = vp8cx_horizontal_line_1_2_scale_c;
+    vp8_vertical_band_1_2_scale          = vp8cx_vertical_band_1_2_scale_c;
+    vp8_last_vertical_band_1_2_scale      = vp8cx_last_vertical_band_1_2_scale_c;
+    vp8_horizontal_line_3_5_scale        = vp8cx_horizontal_line_3_5_scale_c;
+    vp8_vertical_band_3_5_scale          = vp8cx_vertical_band_3_5_scale_c;
+    vp8_last_vertical_band_3_5_scale      = vp8cx_last_vertical_band_3_5_scale_c;
+    vp8_horizontal_line_4_5_scale        = vp8cx_horizontal_line_4_5_scale_c;
+    vp8_vertical_band_4_5_scale          = vp8cx_vertical_band_4_5_scale_c;
+    vp8_last_vertical_band_4_5_scale      = vp8cx_last_vertical_band_4_5_scale_c;
+    */
+
+    return rv;
+}
+
+int
+de_register_generic_scalers(void)
+{
+    int rv = 0;
+
+    if (g_scaling_ptrs)
+    {
+        vpx_free(g_scaling_ptrs);
+        g_scaling_ptrs = 0;
+    }
+    else
+    {
+        rv = -1;
+    }
+
+    return rv;
+}
diff --git a/vpx_scale/leapster/vpxscale_lf.c b/vpx_scale/leapster/vpxscale_lf.c
new file mode 100644
index 000000000..5f05e5de0
--- /dev/null
+++ b/vpx_scale/leapster/vpxscale_lf.c
@@ -0,0 +1,890 @@
+/*
+ *  Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license and patent
+ *  grant that can be found in the LICENSE file in the root of the source
+ *  tree. All contributing project authors may be found in the AUTHORS
+ *  file in the root of the source tree.
+ */
+
+
+/****************************************************************************
+ *
+ *   Module Title :     scale.c
+ *
+ *   Description  :     Image scaling functions.
+ *
+ ***************************************************************************/
+
+/****************************************************************************
+*  Header Files
+****************************************************************************/
+#include "stdlib.h"
+#include "vpx_scale/vpxscale.h"
+#include "vpx_mem/vpx_mem.h"
+#include "vpx_scale/yv12config.h"
+#include "codec_common_interface.h"
+
+/****************************************************************************
+*  Exports
+****************************************************************************/
+/*
+void  (*vp8_vertical_band_4_5_scale)(unsigned char * dest,unsigned int dest_pitch,unsigned int dest_width);
+void  (*vp8_last_vertical_band_4_5_scale)(unsigned char * dest,unsigned int dest_pitch,unsigned int dest_width);
+void  (*vp8_vertical_band_3_5_scale)(unsigned char * dest,unsigned int dest_pitch,unsigned int dest_width);
+void  (*vp8_last_vertical_band_3_5_scale)(unsigned char * dest,unsigned int dest_pitch,unsigned int dest_width);
+void  (*vp8_horizontal_line_1_2_scale)(const unsigned char * source,unsigned int source_width,unsigned char * dest,unsigned int dest_width);
+void  (*vp8_horizontal_line_3_5_scale)(const unsigned char * source,unsigned int source_width,unsigned char * dest,unsigned int dest_width);
+void  (*vp8_horizontal_line_4_5_scale)(const unsigned char * source,unsigned int source_width,unsigned char * dest,unsigned int dest_width);
+void  (*vp8_vertical_band_1_2_scale)(unsigned char * dest,unsigned int dest_pitch,unsigned int dest_width);
+void  (*vp8_last_vertical_band_1_2_scale)(unsigned char * dest,unsigned int dest_pitch,unsigned int dest_width);
+*/
+
+
+typedef struct
+{
+    int     expanded_frame_width;
+    int     expanded_frame_height;
+
+    int HScale;
+    int HRatio;
+    int VScale;
+    int VRatio;
+
+    YV12_BUFFER_CONFIG *src_yuv_config;
+    YV12_BUFFER_CONFIG *dst_yuv_config;
+
+} SCALE_VARS;
+
+
+/****************************************************************************
+ *
+ *  ROUTINE       :     horizontal_line_copy
+ *
+ *  INPUTS        :     None
+ *
+ *
+ *  OUTPUTS       :     None.
+ *
+ *  RETURNS       :     None
+ *
+ *  FUNCTION      :     1 to 1 scaling up for a horizontal line of pixles
+ *
+ *  SPECIAL NOTES :     None.
+ *
+ *  ERRORS        :     None.
+ *
+ ****************************************************************************/
+static
+void horizontal_line_copy(
+    const unsigned char *source,
+    unsigned int source_width,
+    unsigned char *dest,
+    unsigned int dest_width
+)
+{
+    duck_memcpy(dest, source, source_width);
+}
+/****************************************************************************
+ *
+ *  ROUTINE       :     null_scale
+ *
+ *  INPUTS        :     None
+ *
+ *
+ *  OUTPUTS       :     None.
+ *
+ *  RETURNS       :     None
+ *
+ *  FUNCTION      :     1 to 1 scaling up for a vertical band
+ *
+ *  SPECIAL NOTES :     None.
+ *
+ *  ERRORS        :     None.
+ *
+ ****************************************************************************/
+static
+void null_scale(
+    unsigned char *dest,
+    unsigned int dest_pitch,
+    unsigned int dest_width
+)
+{
+    return;
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : scale1d_2t1_i
+ *
+ *  INPUTS        : const unsigned char *source : Pointer to data to be scaled.
+ *                  int source_step              : Number of pixels to step on in source.
+ *                  unsigned int source_scale    : Scale for source (UNUSED).
+ *                  unsigned int source_length   : Length of source (UNUSED).
+ *                  unsigned char *dest         : Pointer to output data array.
+ *                  int dest_step                : Number of pixels to step on in destination.
+ *                  unsigned int dest_scale      : Scale for destination (UNUSED).
+ *                  unsigned int dest_length     : Length of destination.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Performs 2-to-1 interpolated scaling.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+static
+void scale1d_2t1_i
+(
+    const unsigned char *source,
+    int source_step,
+    unsigned int source_scale,
+    unsigned int source_length,
+    unsigned char *dest,
+    int dest_step,
+    unsigned int dest_scale,
+    unsigned int dest_length
+)
+{
+    unsigned int i, j;
+    unsigned int temp;
+
+    (void) source_length;
+    (void) source_scale;
+    (void) dest_scale;
+
+    source_step *= 2;
+    dest[0] = source[0];
+
+    for (i = dest_step, j = source_step; i < dest_length * dest_step; i += dest_step, j += source_step)
+    {
+        temp = 8;
+        temp += 3 * source[j-source_step];
+        temp += 10 * source[j];
+        temp += 3 * source[j+source_step];
+        temp >>= 4;
+        dest[i] = (char)(temp);
+    }
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : scale1d_2t1_ps
+ *
+ *  INPUTS        : const unsigned char *source : Pointer to data to be scaled.
+ *                  int source_step              : Number of pixels to step on in source.
+ *                  unsigned int source_scale    : Scale for source (UNUSED).
+ *                  unsigned int source_length   : Length of source (UNUSED).
+ *                  unsigned char *dest         : Pointer to output data array.
+ *                  int dest_step                : Number of pixels to step on in destination.
+ *                  unsigned int dest_scale      : Scale for destination (UNUSED).
+ *                  unsigned int dest_length     : Length of destination.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Performs 2-to-1 point subsampled scaling.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+static
+void scale1d_2t1_ps
+(
+    const unsigned char *source,
+    int source_step,
+    unsigned int source_scale,
+    unsigned int source_length,
+    unsigned char *dest,
+    int dest_step,
+    unsigned int dest_scale,
+    unsigned int dest_length
+)
+{
+    unsigned int i, j;
+
+    (void) source_length;
+    (void) source_scale;
+    (void) dest_scale;
+
+    source_step *= 2;
+    j = 0;
+
+    for (i = 0; i < dest_length * dest_step; i += dest_step, j += source_step)
+        dest[i] = source[j];
+}
+/****************************************************************************
+ *
+ *  ROUTINE       : scale1d_c
+ *
+ *  INPUTS        : const unsigned char *source : Pointer to data to be scaled.
+ *                  int source_step              : Number of pixels to step on in source.
+ *                  unsigned int source_scale    : Scale for source.
+ *                  unsigned int source_length   : Length of source (UNUSED).
+ *                  unsigned char *dest         : Pointer to output data array.
+ *                  int dest_step                : Number of pixels to step on in destination.
+ *                  unsigned int dest_scale      : Scale for destination.
+ *                  unsigned int dest_length     : Length of destination.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Performs linear interpolation in one dimension.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+static
+void scale1d_c
+(
+    const unsigned char *source,
+    int source_step,
+    unsigned int source_scale,
+    unsigned int source_length,
+    unsigned char *dest,
+    int dest_step,
+    unsigned int dest_scale,
+    unsigned int dest_length
+)
+{
+    unsigned int i;
+    unsigned int round_value = dest_scale / 2;
+    unsigned int left_modifier = dest_scale;
+    unsigned int right_modifier = 0;
+    unsigned char left_pixel = *source;
+    unsigned char right_pixel = *(source + source_step);
+
+    (void) source_length;
+
+    // These asserts are needed if there are boundary issues...
+    //assert ( dest_scale > source_scale );
+    //assert ( (source_length-1) * dest_scale >= (dest_length-1) * source_scale );
+
+    for (i = 0; i < dest_length * dest_step; i += dest_step)
+    {
+        dest[i] = (char)((left_modifier * left_pixel + right_modifier * right_pixel + round_value) / dest_scale);
+
+        right_modifier += source_scale;
+
+        while (right_modifier > dest_scale)
+        {
+            right_modifier -= dest_scale;
+            source += source_step;
+            left_pixel = *source;
+            right_pixel = *(source + source_step);
+        }
+
+        left_modifier = dest_scale - right_modifier;
+    }
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : Scale2D
+ *
+ *  INPUTS        : const unsigned char *source  : Pointer to data to be scaled.
+ *                  int source_pitch              : Stride of source image.
+ *                  unsigned int source_width     : Width of input image.
+ *                  unsigned int source_height    : Height of input image.
+ *                  unsigned char *dest          : Pointer to output data array.
+ *                  int dest_pitch                : Stride of destination image.
+ *                  unsigned int dest_width       : Width of destination image.
+ *                  unsigned int dest_height      : Height of destination image.
+ *                  unsigned char *temp_area      : Pointer to temp work area.
+ *                  unsigned char temp_area_height : Height of temp work area.
+ *                  unsigned int hscale          : Horizontal scale factor numerator.
+ *                  unsigned int hratio          : Horizontal scale factor denominator.
+ *                  unsigned int vscale          : Vertical scale factor numerator.
+ *                  unsigned int vratio          : Vertical scale factor denominator.
+ *                  unsigned int interlaced      : Interlace flag.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Performs 2-tap linear interpolation in two dimensions.
+ *
+ *  SPECIAL NOTES : Expansion is performed one band at a time to help with
+ *                  caching.
+ *
+ ****************************************************************************/
+static
+void Scale2D
+(
+    const unsigned char *source,
+    int source_pitch,
+    unsigned int source_width,
+    unsigned int source_height,
+    unsigned char *dest,
+    int dest_pitch,
+    unsigned int dest_width,
+    unsigned int dest_height,
+    unsigned char *temp_area,
+    unsigned char temp_area_height,
+    unsigned int hscale,
+    unsigned int hratio,
+    unsigned int vscale,
+    unsigned int vratio,
+    unsigned int interlaced
+)
+{
+    unsigned int i, j, k;
+    unsigned int bands;
+    unsigned int dest_band_height;
+    unsigned int source_band_height;
+
+    typedef void (*Scale1D)(const unsigned char * source, int source_step, unsigned int source_scale, unsigned int source_length,
+                            unsigned char * dest, int dest_step, unsigned int dest_scale, unsigned int dest_length);
+
+    Scale1D Scale1Dv = scale1d_c;
+    Scale1D Scale1Dh = scale1d_c;
+
+    if (hscale == 2 && hratio == 1)
+        Scale1Dh = scale1d_2t1_ps;
+
+    if (vscale == 2 && vratio == 1)
+    {
+        if (interlaced)
+            Scale1Dv = scale1d_2t1_ps;
+        else
+            Scale1Dv = scale1d_2t1_i;
+    }
+
+    if (source_height == dest_height)
+    {
+        // for each band of the image
+        for (k = 0; k < dest_height; k++)
+        {
+            Scale1Dh(source, 1, hscale, source_width + 1, dest, 1, hratio, dest_width);
+            source += source_pitch;
+            dest   += dest_pitch;
+        }
+
+        return;
+    }
+
+    if (dest_height > source_height)
+    {
+        dest_band_height   = temp_area_height - 1;
+        source_band_height = dest_band_height * source_height / dest_height;
+    }
+    else
+    {
+        source_band_height = temp_area_height - 1;
+        dest_band_height   = source_band_height * vratio / vscale;
+    }
+
+    // first row needs to be done so that we can stay one row ahead for vertical zoom
+    Scale1Dh(source, 1, hscale, source_width + 1, temp_area, 1, hratio, dest_width);
+
+    // for each band of the image
+    bands = (dest_height + dest_band_height - 1) / dest_band_height;
+
+    for (k = 0; k < bands; k++)
+    {
+        // scale one band horizontally
+        for (i = 1; i < source_band_height + 1; i++)
+        {
+            if (k * source_band_height + i < source_height)
+            {
+                Scale1Dh(source + i * source_pitch, 1, hscale, source_width + 1,
+                         temp_area + i * dest_pitch, 1, hratio, dest_width);
+            }
+            else  //  Duplicate the last row
+            {
+                // copy temp_area row 0 over from last row in the past
+                duck_memcpy(temp_area + i * dest_pitch, temp_area + (i - 1)*dest_pitch, dest_pitch);
+            }
+        }
+
+        // scale one band vertically
+        for (j = 0; j < dest_width; j++)
+        {
+            Scale1Dv(&temp_area[j], dest_pitch, vscale, source_band_height + 1,
+                     &dest[j], dest_pitch, vratio, dest_band_height);
+        }
+
+        // copy temp_area row 0 over from last row in the past
+        duck_memcpy(temp_area, temp_area + source_band_height * dest_pitch, dest_pitch);
+
+        // move to the next band
+        source += source_band_height * source_pitch;
+        dest   += dest_band_height * dest_pitch;
+    }
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : vp8_scale_frame
+ *
+ *  INPUTS        : YV12_BUFFER_CONFIG *src       : Pointer to frame to be scaled.
+ *                  YV12_BUFFER_CONFIG *dst       : Pointer to buffer to hold scaled frame.
+ *                  unsigned char *temp_area      : Pointer to temp work area.
+ *                  unsigned char temp_area_height : Height of temp work area.
+ *                  unsigned int hscale          : Horizontal scale factor numerator.
+ *                  unsigned int hratio          : Horizontal scale factor denominator.
+ *                  unsigned int vscale          : Vertical scale factor numerator.
+ *                  unsigned int vratio          : Vertical scale factor denominator.
+ *                  unsigned int interlaced      : Interlace flag.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Performs 2-tap linear interpolation in two dimensions.
+ *
+ *  SPECIAL NOTES : Expansion is performed one band at a time to help with
+ *                  caching.
+ *
+ ****************************************************************************/
+void vp8_scale_frame
+(
+    YV12_BUFFER_CONFIG *src,
+    YV12_BUFFER_CONFIG *dst,
+    unsigned char *temp_area,
+    unsigned char temp_height,
+    unsigned int hscale,
+    unsigned int hratio,
+    unsigned int vscale,
+    unsigned int vratio,
+    unsigned int interlaced
+)
+{
+    int i;
+    int dw = (hscale - 1 + src->y_width * hratio) / hscale;
+    int dh = (vscale - 1 + src->y_height * vratio) / vscale;
+
+    // call our internal scaling routines!!
+    Scale2D((unsigned char *) src->y_buffer, src->y_stride, src->y_width, src->y_height,
+            (unsigned char *) dst->y_buffer, dst->y_stride, dw, dh,
+            temp_area, temp_height, hscale, hratio, vscale, vratio, interlaced);
+
+    if (dw < (int)dst->y_width)
+        for (i = 0; i < dh; i++)
+            duck_memset(dst->y_buffer + i * dst->y_stride + dw - 1, dst->y_buffer[i*dst->y_stride+dw-2], dst->y_width - dw + 1);
+
+    if (dh < (int)dst->y_height)
+        for (i = dh - 1; i < (int)dst->y_height; i++)
+            duck_memcpy(dst->y_buffer + i * dst->y_stride, dst->y_buffer + (dh - 2) * dst->y_stride, dst->y_width + 1);
+
+    Scale2D((unsigned char *) src->u_buffer, src->uv_stride, src->uv_width, src->uv_height,
+            (unsigned char *) dst->u_buffer, dst->uv_stride, dw / 2, dh / 2,
+            temp_area, temp_height, hscale, hratio, vscale, vratio, interlaced);
+
+    if (dw / 2 < (int)dst->uv_width)
+        for (i = 0; i < dst->uv_height; i++)
+            duck_memset(dst->u_buffer + i * dst->uv_stride + dw / 2 - 1, dst->u_buffer[i*dst->uv_stride+dw/2-2], dst->uv_width - dw / 2 + 1);
+
+    if (dh / 2 < (int)dst->uv_height)
+        for (i = dh / 2 - 1; i < (int)dst->y_height / 2; i++)
+            duck_memcpy(dst->u_buffer + i * dst->uv_stride, dst->u_buffer + (dh / 2 - 2)*dst->uv_stride, dst->uv_width);
+
+    Scale2D((unsigned char *) src->v_buffer, src->uv_stride, src->uv_width, src->uv_height,
+            (unsigned char *) dst->v_buffer, dst->uv_stride, dw / 2, dh / 2,
+            temp_area, temp_height, hscale, hratio, vscale, vratio, interlaced);
+
+    if (dw / 2 < (int)dst->uv_width)
+        for (i = 0; i < dst->uv_height; i++)
+            duck_memset(dst->v_buffer + i * dst->uv_stride + dw / 2 - 1, dst->v_buffer[i*dst->uv_stride+dw/2-2], dst->uv_width - dw / 2 + 1);
+
+    if (dh / 2 < (int) dst->uv_height)
+        for (i = dh / 2 - 1; i < (int)dst->y_height / 2; i++)
+            duck_memcpy(dst->v_buffer + i * dst->uv_stride, dst->v_buffer + (dh / 2 - 2)*dst->uv_stride, dst->uv_width);
+}
+/****************************************************************************
+ *
+ *  ROUTINE       : any_ratio_2d_scale
+ *
+ *  INPUTS        : SCALE_INSTANCE *si      : Pointer to post-processor instance (NOT USED).
+ *                  const unsigned char *source : Pointer to source image.
+ *                  unsigned int source_pitch    : Stride of source image.
+ *                  unsigned int source_width    : Width of source image.
+ *                  unsigned int source_height   : Height of source image (NOT USED).
+ *                  unsigned char *dest         : Pointer to destination image.
+ *                  unsigned int dest_pitch      : Stride of destination image.
+ *                  unsigned int dest_width      : Width of destination image.
+ *                  unsigned int dest_height     : Height of destination image.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : int: 1 if image scaled, 0 if image could not be scaled.
+ *
+ *  FUNCTION      : Scale the image with changing apect ratio.
+ *
+ *  SPECIAL NOTES : This scaling is a bi-linear scaling. Need to re-work the
+ *                  whole function for new scaling algorithm.
+ *
+ ****************************************************************************/
+static
+int any_ratio_2d_scale
+(
+    SCALE_VARS *si,
+    const unsigned char *source,
+    unsigned int source_pitch,
+    unsigned int source_width,
+    unsigned int source_height,
+    unsigned char *dest,
+    unsigned int dest_pitch,
+    unsigned int dest_width,
+    unsigned int dest_height
+)
+{
+    unsigned int i, k;
+    unsigned int src_band_height  = 0;
+    unsigned int dest_band_height = 0;
+
+    // suggested scale factors
+    int hs = si->HScale;
+    int hr = si->HRatio;
+    int vs = si->VScale;
+    int vr = si->VRatio;
+
+    // assume the ratios are scalable instead of should be centered
+    int ratio_scalable = 1;
+
+    void (*horiz_line_scale)(const unsigned char *, unsigned int, unsigned char *, unsigned int) = NULL;
+    void (*vert_band_scale)(unsigned char *, unsigned int, unsigned int) = NULL;
+    void (*last_vert_band_scale)(unsigned char *, unsigned int, unsigned int) = NULL;
+
+    (void) si;
+
+    // find out the ratio for each direction
+    switch (hr * 10 / hs)
+    {
+    case 8:
+        // 4-5 Scale in Width direction
+        horiz_line_scale = g_scaling_ptrs->vpxhorizontal_line_4_5_scale_t;
+        break;
+    case 6:
+        // 3-5 Scale in Width direction
+        horiz_line_scale = g_scaling_ptrs->vpxhorizontal_line_3_5_scale_t;
+        break;
+    case 5:
+        // 1-2 Scale in Width direction
+        horiz_line_scale = g_scaling_ptrs->vpxhorizontal_line_1_2_scale_t;
+        break;
+    case 10:
+        // no scale in Width direction
+        horiz_line_scale = horizontal_line_copy;
+        break;
+    default:
+        // The ratio is not acceptable now
+        // throw("The ratio is not acceptable for now!");
+        ratio_scalable = 0;
+        break;
+    }
+
+    switch (vr * 10 / vs)
+    {
+    case 8:
+        // 4-5 Scale in vertical direction
+        vert_band_scale     = g_scaling_ptrs->vpxvertical_band_4_5_scale_t;
+        last_vert_band_scale = g_scaling_ptrs->vpxlast_vertical_band_4_5_scale_t;
+        src_band_height     = 4;
+        dest_band_height    = 5;
+        break;
+    case 6:
+        // 3-5 Scale in vertical direction
+        vert_band_scale     = g_scaling_ptrs->vpxvertical_band_3_5_scale_t;
+        last_vert_band_scale = g_scaling_ptrs->vpxlast_vertical_band_3_5_scale_t;
+        src_band_height     = 3;
+        dest_band_height    = 5;
+        break;
+    case 5:
+        // 1-2 Scale in vertical direction
+        vert_band_scale     = g_scaling_ptrs->vpxvertical_band_1_2_scale_t;
+        last_vert_band_scale = g_scaling_ptrs->vpxlast_vertical_band_1_2_scale_t;
+        src_band_height     = 1;
+        dest_band_height    = 2;
+        break;
+    case 10:
+        // no scale in Width direction
+        vert_band_scale     = null_scale;
+        last_vert_band_scale = null_scale;
+        src_band_height     = 4;
+        dest_band_height    = 4;
+        break;
+    default:
+        // The ratio is not acceptable now
+        // throw("The ratio is not acceptable for now!");
+        ratio_scalable = 0;
+        break;
+    }
+
+    if (ratio_scalable == 0)
+        return ratio_scalable;
+
+    horiz_line_scale(source, source_width, dest, dest_width);
+
+    // except last band
+    for (k = 0; k < (dest_height + dest_band_height - 1) / dest_band_height - 1; k++)
+    {
+        // scale one band horizontally
+        for (i = 1; i < src_band_height; i++)
+        {
+            horiz_line_scale(source + i * source_pitch,
+                             source_width,
+                             dest + i * dest_pitch,
+                             dest_width);
+        }
+
+        // first line of next band
+        horiz_line_scale(source + src_band_height * source_pitch,
+                         source_width,
+                         dest + dest_band_height * dest_pitch,
+                         dest_width);
+
+        // Vertical scaling is in place
+        vert_band_scale(dest, dest_pitch, dest_width);
+
+        // Next band...
+        source += src_band_height  * source_pitch;
+        dest   += dest_band_height * dest_pitch;
+    }
+
+    // scale one band horizontally
+    for (i = 1; i < src_band_height; i++)
+    {
+        horiz_line_scale(source + i * source_pitch,
+                         source_width,
+                         dest + i * dest_pitch,
+                         dest_width);
+    }
+
+    // Vertical scaling is in place
+    last_vert_band_scale(dest, dest_pitch, dest_width);
+
+    return ratio_scalable;
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : any_ratio_frame_scale
+ *
+ *  INPUTS        : SCALE_INSTANCE *si       : Pointer to post-processor instance (NOT USED).
+ *                  unsigned char *frame_buffer           : Pointer to source image.
+ *                  int YOffset                : Offset from start of buffer to Y samples.
+ *                  int UVOffset               : Offset from start of buffer to UV samples.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : int: 1 if image scaled, 0 if image could not be scaled.
+ *
+ *  FUNCTION      : Scale the image with changing apect ratio.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+static
+int any_ratio_frame_scale(SCALE_VARS *scale_vars, int YOffset, int UVOffset)
+{
+    int i;
+    int ew;
+    int eh;
+
+    // suggested scale factors
+    int hs = scale_vars->HScale;
+    int hr = scale_vars->HRatio;
+    int vs = scale_vars->VScale;
+    int vr = scale_vars->VRatio;
+
+    int ratio_scalable = 1;
+
+    int sw = (scale_vars->expanded_frame_width * hr + hs - 1) / hs;
+    int sh = (scale_vars->expanded_frame_height * vr + vs - 1) / vs;
+    int dw = scale_vars->expanded_frame_width;
+    int dh = scale_vars->expanded_frame_height;
+    YV12_BUFFER_CONFIG *src_yuv_config = scale_vars->src_yuv_config;
+    YV12_BUFFER_CONFIG *dst_yuv_config = scale_vars->dst_yuv_config;
+
+    if (hr == 3)
+        ew = (sw + 2) / 3 * 3 * hs / hr;
+    else
+        ew = (sw + 7) / 8 * 8 * hs / hr;
+
+    if (vr == 3)
+        eh = (sh + 2) / 3 * 3 * vs / vr;
+    else
+        eh = (sh + 7) / 8 * 8 * vs / vr;
+
+    ratio_scalable = any_ratio_2d_scale(scale_vars,
+                                        (const unsigned char *)src_yuv_config->y_buffer,
+                                        src_yuv_config->y_stride, sw, sh,
+                                        (unsigned char *) dst_yuv_config->y_buffer + YOffset,
+                                        dst_yuv_config->y_stride, dw, dh);
+
+    for (i = 0; i < eh; i++)
+        duck_memset(dst_yuv_config->y_buffer + YOffset + i * dst_yuv_config->y_stride + dw, 0, ew - dw);
+
+    for (i = dh; i < eh; i++)
+        duck_memset(dst_yuv_config->y_buffer + YOffset + i * dst_yuv_config->y_stride, 0, ew);
+
+    if (ratio_scalable == 0)
+        return ratio_scalable;
+
+    sw = (sw + 1) >> 1;
+    sh = (sh + 1) >> 1;
+    dw = (dw + 1) >> 1;
+    dh = (dh + 1) >> 1;
+
+    any_ratio_2d_scale(scale_vars,
+                       (const unsigned char *)src_yuv_config->u_buffer,
+                       src_yuv_config->y_stride / 2, sw, sh,
+                       (unsigned char *)dst_yuv_config->u_buffer + UVOffset,
+                       dst_yuv_config->uv_stride, dw, dh);
+
+    any_ratio_2d_scale(scale_vars,
+                       (const unsigned char *)src_yuv_config->v_buffer,
+                       src_yuv_config->y_stride / 2, sw, sh,
+                       (unsigned char *)dst_yuv_config->v_buffer + UVOffset,
+                       dst_yuv_config->uv_stride, dw, dh);
+
+    return ratio_scalable;
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : center_image
+ *
+ *  INPUTS        : SCALE_INSTANCE *si       : Pointer to post-processor instance.
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Centers the image without scaling in the output buffer.
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+static void
+center_image(YV12_BUFFER_CONFIG *src_yuv_config, YV12_BUFFER_CONFIG *dst_yuv_config)
+{
+    int i;
+    int row_offset, col_offset;
+    char *src_data_pointer;
+    char *dst_data_pointer;
+
+    // center values
+    row_offset = (dst_yuv_config->y_height - src_yuv_config->y_height) / 2;
+    col_offset = (dst_yuv_config->y_width - src_yuv_config->y_width) / 2;
+
+    // Y's
+    src_data_pointer = src_yuv_config->y_buffer;
+    dst_data_pointer = (char *)dst_yuv_config->y_buffer + (row_offset * dst_yuv_config->y_stride) + col_offset;
+
+    for (i = 0; i < src_yuv_config->y_height; i++)
+    {
+        duck_memcpy(dst_data_pointer, src_data_pointer, src_yuv_config->y_width);
+        dst_data_pointer += dst_yuv_config->y_stride;
+        src_data_pointer += src_yuv_config->y_stride;
+    }
+
+    row_offset /= 2;
+    col_offset /= 2;
+
+    // U's
+    src_data_pointer = src_yuv_config->u_buffer;
+    dst_data_pointer = (char *)dst_yuv_config->u_buffer + (row_offset * dst_yuv_config->uv_stride) + col_offset;
+
+    for (i = 0; i < src_yuv_config->uv_height; i++)
+    {
+        duck_memcpy(dst_data_pointer, src_data_pointer, src_yuv_config->uv_width);
+        dst_data_pointer += dst_yuv_config->uv_stride;
+        src_data_pointer += src_yuv_config->uv_stride;
+    }
+
+    // V's
+    src_data_pointer = src_yuv_config->v_buffer;
+    dst_data_pointer = (char *)dst_yuv_config->v_buffer + (row_offset * dst_yuv_config->uv_stride) + col_offset;
+
+    for (i = 0; i < src_yuv_config->uv_height; i++)
+    {
+        duck_memcpy(dst_data_pointer, src_data_pointer, src_yuv_config->uv_width);
+        dst_data_pointer += dst_yuv_config->uv_stride;
+        src_data_pointer += src_yuv_config->uv_stride;
+    }
+}
+
+/****************************************************************************
+ *
+ *  ROUTINE       : scale_or_center
+ *
+ *  INPUTS        : SCALE_INSTANCE *si       : Pointer to post-processor instance.
+ *
+ *
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Decides to scale or center image in scale buffer for blit
+ *
+ *  SPECIAL NOTES : None.
+ *
+ ****************************************************************************/
+void
+vp8_yv12_scale_or_center
+(
+    YV12_BUFFER_CONFIG *src_yuv_config,
+    YV12_BUFFER_CONFIG *dst_yuv_config,
+    int expanded_frame_width,
+    int expanded_frame_height,
+    int scaling_mode,
+    int HScale,
+    int HRatio,
+    int VScale,
+    int VRatio
+)
+{
+//    if ( ppi->post_processing_level )
+    //      update_umvborder ( ppi, frame_buffer );
+
+
+    switch (scaling_mode)
+    {
+    case SCALE_TO_FIT:
+    case MAINTAIN_ASPECT_RATIO:
+    {
+        SCALE_VARS scale_vars;
+        // center values
+#if 1
+        int row = (dst_yuv_config->y_height - expanded_frame_height) / 2;
+        int col = (dst_yuv_config->y_width  - expanded_frame_width) / 2;
+//        int YOffset  = row * dst_yuv_config->y_width + col;
+//        int UVOffset = (row>>1) * dst_yuv_config->uv_width + (col>>1);
+        int YOffset  = row * dst_yuv_config->y_stride + col;
+        int UVOffset = (row >> 1) * dst_yuv_config->uv_stride + (col >> 1);
+#else
+        int row = (src_yuv_config->y_height - expanded_frame_height) / 2;
+        int col = (src_yuv_config->y_width  - expanded_frame_width) / 2;
+        int YOffset  = row * src_yuv_config->y_width + col;
+        int UVOffset = (row >> 1) * src_yuv_config->uv_width + (col >> 1);
+#endif
+
+        scale_vars.dst_yuv_config = dst_yuv_config;
+        scale_vars.src_yuv_config = src_yuv_config;
+        scale_vars.HScale = HScale;
+        scale_vars.HRatio = HRatio;
+        scale_vars.VScale = VScale;
+        scale_vars.VRatio = VRatio;
+        scale_vars.expanded_frame_width = expanded_frame_width;
+        scale_vars.expanded_frame_height = expanded_frame_height;
+
+        // perform center and scale
+        any_ratio_frame_scale(&scale_vars, YOffset, UVOffset);
+
+        break;
+    }
+    case CENTER:
+        center_image(src_yuv_config, dst_yuv_config);
+        break;
+
+    default:
+        break;
+    }
+}
diff --git a/vpx_scale/leapster/yv12extend.c b/vpx_scale/leapster/yv12extend.c
new file mode 100644
index 000000000..480d971b4
--- /dev/null
+++ b/vpx_scale/leapster/yv12extend.c
@@ -0,0 +1,231 @@
+/*
+ *  Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license and patent
+ *  grant that can be found in the LICENSE file in the root of the source
+ *  tree. All contributing project authors may be found in the AUTHORS
+ *  file in the root of the source tree.
+ */
+
+
+/****************************************************************************
+ *
+ *   Module Title :     yv12extend.c
+ *
+ *   Description  :
+ *
+ ***************************************************************************/
+
+/****************************************************************************
+*  Header Files
+****************************************************************************/
+//#include <stdlib.h>
+#include "vpx_scale/yv12config.h"
+#include "vpx_mem/vpx_mem.h"
+
+/****************************************************************************
+*  Exports
+****************************************************************************/
+
+/****************************************************************************
+ *
+ ****************************************************************************/
+void
+vp8_yv12_extend_frame_borders(YV12_BUFFER_CONFIG *ybf)
+{
+    int i;
+    char *src_ptr1, *src_ptr2;
+    char *dest_ptr1, *dest_ptr2;
+
+    unsigned int Border;
+    int plane_stride;
+    int plane_height;
+    int plane_width;
+
+    /***********/
+    /* Y Plane */
+    /***********/
+    Border = ybf->border;
+    plane_stride = ybf->y_stride;
+    plane_height = ybf->y_height;
+    plane_width = ybf->y_width;
+
+    // copy the left and right most columns out
+    src_ptr1 = ybf->y_buffer;
+    src_ptr2 = src_ptr1 + plane_width - 1;
+    dest_ptr1 = src_ptr1 - Border;
+    dest_ptr2 = src_ptr2 + 1;
+
+    for (i = 0; i < plane_height; i++)
+    {
+        memset(dest_ptr1, src_ptr1[0], Border);
+        memset(dest_ptr2, src_ptr2[0], Border);
+        src_ptr1  += plane_stride;
+        src_ptr2  += plane_stride;
+        dest_ptr1 += plane_stride;
+        dest_ptr2 += plane_stride;
+    }
+
+    // Now copy the top and bottom source lines into each line of the respective borders
+    src_ptr1 = ybf->y_buffer - Border;
+    src_ptr2 = src_ptr1 + (plane_height * plane_stride) - plane_stride;
+    dest_ptr1 = src_ptr1 - (Border * plane_stride);
+    dest_ptr2 = src_ptr2 + plane_stride;
+
+    for (i = 0; i < (int)Border; i++)
+    {
+        memcpy(dest_ptr1, src_ptr1, plane_stride);
+        memcpy(dest_ptr2, src_ptr2, plane_stride);
+        dest_ptr1 += plane_stride;
+        dest_ptr2 += plane_stride;
+    }
+
+    plane_stride /= 2;
+    plane_height /= 2;
+    plane_width /= 2;
+    Border /= 2;
+
+    /***********/
+    /* U Plane */
+    /***********/
+
+    // copy the left and right most columns out
+    src_ptr1 = ybf->u_buffer;
+    src_ptr2 = src_ptr1 + plane_width - 1;
+    dest_ptr1 = src_ptr1 - Border;
+    dest_ptr2 = src_ptr2 + 1;
+
+    for (i = 0; i < plane_height; i++)
+    {
+        memset(dest_ptr1, src_ptr1[0], Border);
+        memset(dest_ptr2, src_ptr2[0], Border);
+        src_ptr1  += plane_stride;
+        src_ptr2  += plane_stride;
+        dest_ptr1 += plane_stride;
+        dest_ptr2 += plane_stride;
+    }
+
+    // Now copy the top and bottom source lines into each line of the respective borders
+    src_ptr1 = ybf->u_buffer - Border;
+    src_ptr2 = src_ptr1 + (plane_height * plane_stride) - plane_stride;
+    dest_ptr1 = src_ptr1 - (Border * plane_stride);
+    dest_ptr2 = src_ptr2 + plane_stride;
+
+    for (i = 0; i < (int)(Border); i++)
+    {
+        memcpy(dest_ptr1, src_ptr1, plane_stride);
+        memcpy(dest_ptr2, src_ptr2, plane_stride);
+        dest_ptr1 += plane_stride;
+        dest_ptr2 += plane_stride;
+    }
+
+    /***********/
+    /* V Plane */
+    /***********/
+
+    // copy the left and right most columns out
+    src_ptr1 = ybf->v_buffer;
+    src_ptr2 = src_ptr1 + plane_width - 1;
+    dest_ptr1 = src_ptr1 - Border;
+    dest_ptr2 = src_ptr2 + 1;
+
+    for (i = 0; i < plane_height; i++)
+    {
+        memset(dest_ptr1, src_ptr1[0], Border);
+        memset(dest_ptr2, src_ptr2[0], Border);
+        src_ptr1  += plane_stride;
+        src_ptr2  += plane_stride;
+        dest_ptr1 += plane_stride;
+        dest_ptr2 += plane_stride;
+    }
+
+    // Now copy the top and bottom source lines into each line of the respective borders
+    src_ptr1 = ybf->v_buffer - Border;
+    src_ptr2 = src_ptr1 + (plane_height * plane_stride) - plane_stride;
+    dest_ptr1 = src_ptr1 - (Border * plane_stride);
+    dest_ptr2 = src_ptr2 + plane_stride;
+
+    for (i = 0; i < (int)(Border); i++)
+    {
+        memcpy(dest_ptr1, src_ptr1, plane_stride);
+        memcpy(dest_ptr2, src_ptr2, plane_stride);
+        dest_ptr1 += plane_stride;
+        dest_ptr2 += plane_stride;
+    }
+}
+/****************************************************************************
+ *
+ *  ROUTINE       : vp8_yv12_copy_frame
+ *
+ *  INPUTS        :
+ *
+ *  OUTPUTS       : None.
+ *
+ *  RETURNS       : void
+ *
+ *  FUNCTION      : Copies the source image into the destination image and
+ *                  updates the destination's UMV borders.
+ *
+ *  SPECIAL NOTES : The frames are assumed to be identical in size.
+ *
+ ****************************************************************************/
+void
+vp8_yv12_copy_frame(YV12_BUFFER_CONFIG *src_ybc, YV12_BUFFER_CONFIG *dst_ybc)
+{
+    int row;
+    int i;
+    unsigned int *source;
+    _Uncached unsigned int *dest;
+    int height;
+    int width;
+
+    height = src_ybc->y_height + (src_ybc->border * 2);
+    width =  src_ybc->y_width + (src_ybc->border * 2);
+    width /= 4;
+    source = (unsigned int *)(src_ybc->y_buffer - (src_ybc->border * src_ybc->y_stride) - src_ybc->border);
+    dest = (_Uncached unsigned int *)(dst_ybc->y_buffer - (dst_ybc->border * dst_ybc->y_stride) - dst_ybc->border);
+
+    for (row = 0; row < height; row++)
+    {
+        for (i = 0; i < width; i++)
+        {
+            dest[i] = source[i];
+        }
+
+        source += width;
+        dest   += width;
+    }
+
+    height = src_ybc->uv_height + (src_ybc->border);
+    width =  src_ybc->uv_width + (src_ybc->border);
+    width /= 4;
+
+    source = (unsigned int *)(src_ybc->u_buffer - (src_ybc->border / 2 * src_ybc->uv_stride) - src_ybc->border / 2);
+    dest = (_Uncached unsigned int *)(dst_ybc->u_buffer - (dst_ybc->border / 2 * dst_ybc->uv_stride) - dst_ybc->border / 2);
+
+    for (row = 0; row < height; row++)
+    {
+        for (i = 0; i < width; i++)
+        {
+            dest[i] = source[i];
+        }
+
+        source += width;
+        dest   += width;
+    }
+
+    source = (unsigned int *)(src_ybc->v_buffer - (src_ybc->border / 2 * src_ybc->uv_stride) - src_ybc->border / 2);
+    dest = (_Uncached unsigned int *)(dst_ybc->v_buffer - (dst_ybc->border / 2 * dst_ybc->uv_stride) - dst_ybc->border / 2);
+
+    for (row = 0; row < height; row++)
+    {
+        for (i = 0; i < width; i++)
+        {
+            dest[i] = source[i];
+        }
+
+        source += width;
+        dest   += width;
+    }
+
+}