diff --git a/configure b/configure
index 67171744bc4e504fc30c766e39ff416153a7a9ab..52ff9c898471218bf403228c99d940d6c6307fd9 100755
--- a/configure
+++ b/configure
@@ -228,6 +228,7 @@ EXPERIMENT_LIST="
newupdate
superblocks
expanded_coef_context
+ int_8x8fdct
"
CONFIG_LIST="
external_build
diff --git a/vp8/encoder/dct.c b/vp8/encoder/dct.c
index e7505619a7d0cc2953d5f007095e0dd290aaa8bd..6f9c68ef756175c85254bb09217e92254744fd3a 100644
--- a/vp8/encoder/dct.c
+++ b/vp8/encoder/dct.c
@@ -12,6 +12,249 @@
#include <math.h>
#include "vpx_ports/config.h"
+#if CONFIG_INT_8X8FDCT
+
+static const int xC1S7 = 16069;
+static const int xC2S6 = 15137;
+static const int xC3S5 = 13623;
+static const int xC4S4 = 11585;
+static const int xC5S3 = 9102;
+static const int xC6S2 = 6270;
+static const int xC7S1 = 3196;
+
+#define SHIFT_BITS 14
+#define DOROUND(X) X += (1<<(SHIFT_BITS-1));
+
+#define FINAL_SHIFT 3
+#define FINAL_ROUNDING (1<<(FINAL_SHIFT -1))
+#define IN_SHIFT (FINAL_SHIFT+1)
+
+
+void vp8_short_fdct8x8_c ( short * InputData, short * OutputData, int pitch)
+{
+ int loop;
+ int short_pitch = pitch>>1;
+ int is07, is12, is34, is56;
+ int is0734, is1256;
+ int id07, id12, id34, id56;
+ int irot_input_x, irot_input_y;
+ int icommon_product1; // Re-used product (c4s4 * (s12 - s56))
+ int icommon_product2; // Re-used product (c4s4 * (d12 + d56))
+ int temp1, temp2; // intermediate variable for computation
+
+ int InterData[64];
+ int *ip = InterData;
+ short *op = OutputData;
+
+ for (loop = 0; loop < 8; loop++)
+ {
+ // Pre calculate some common sums and differences.
+ is07 = (InputData[0] + InputData[7])<<IN_SHIFT;
+ is12 = (InputData[1] + InputData[2])<<IN_SHIFT;
+ is34 = (InputData[3] + InputData[4])<<IN_SHIFT;
+ is56 = (InputData[5] + InputData[6])<<IN_SHIFT;
+ id07 = (InputData[0] - InputData[7])<<IN_SHIFT;
+ id12 = (InputData[1] - InputData[2])<<IN_SHIFT;
+ id34 = (InputData[3] - InputData[4])<<IN_SHIFT;
+ id56 = (InputData[5] - InputData[6])<<IN_SHIFT;
+
+ is0734 = is07 + is34;
+ is1256 = is12 + is56;
+
+ // Pre-Calculate some common product terms.
+ icommon_product1 = xC4S4*(is12 - is56);
+ DOROUND(icommon_product1)
+ icommon_product1>>=SHIFT_BITS;
+
+ icommon_product2 = xC4S4*(id12 + id56);
+ DOROUND(icommon_product2)
+ icommon_product2>>=SHIFT_BITS;
+
+
+ ip[0] = (xC4S4*(is0734 + is1256));
+ DOROUND(ip[0]);
+ ip[0] >>= SHIFT_BITS;
+
+ ip[4] = (xC4S4*(is0734 - is1256));
+ DOROUND(ip[4]);
+ ip[4] >>= SHIFT_BITS;
+
+ // Define inputs to rotation for outputs 2 and 6
+ irot_input_x = id12 - id56;
+ irot_input_y = is07 - is34;
+
+ // Apply rotation for outputs 2 and 6.
+ temp1=xC6S2*irot_input_x;
+ DOROUND(temp1);
+ temp1>>=SHIFT_BITS;
+ temp2=xC2S6*irot_input_y;
+ DOROUND(temp2);
+ temp2>>=SHIFT_BITS;
+ ip[2] = temp1 + temp2;
+
+ temp1=xC6S2*irot_input_y;
+ DOROUND(temp1);
+ temp1>>=SHIFT_BITS;
+ temp2=xC2S6*irot_input_x ;
+ DOROUND(temp2);
+ temp2>>=SHIFT_BITS;
+ ip[6] = temp1 -temp2 ;
+
+ // Define inputs to rotation for outputs 1 and 7
+ irot_input_x = icommon_product1 + id07;
+ irot_input_y = -( id34 + icommon_product2 );
+
+ // Apply rotation for outputs 1 and 7.
+ temp1=xC1S7*irot_input_x;
+ DOROUND(temp1);
+ temp1>>=SHIFT_BITS;
+ temp2=xC7S1*irot_input_y;
+ DOROUND(temp2);
+ temp2>>=SHIFT_BITS;
+ ip[1] = temp1 - temp2;
+
+ temp1=xC7S1*irot_input_x;
+ DOROUND(temp1);
+ temp1>>=SHIFT_BITS;
+ temp2=xC1S7*irot_input_y ;
+ DOROUND(temp2);
+ temp2>>=SHIFT_BITS;
+ ip[7] = temp1 + temp2 ;
+
+ // Define inputs to rotation for outputs 3 and 5
+ irot_input_x = id07 - icommon_product1;
+ irot_input_y = id34 - icommon_product2;
+
+ // Apply rotation for outputs 3 and 5.
+ temp1=xC3S5*irot_input_x;
+ DOROUND(temp1);
+ temp1>>=SHIFT_BITS;
+ temp2=xC5S3*irot_input_y ;
+ DOROUND(temp2);
+ temp2>>=SHIFT_BITS;
+ ip[3] = temp1 - temp2 ;
+
+
+ temp1=xC5S3*irot_input_x;
+ DOROUND(temp1);
+ temp1>>=SHIFT_BITS;
+ temp2=xC3S5*irot_input_y;
+ DOROUND(temp2);
+ temp2>>=SHIFT_BITS;
+ ip[5] = temp1 + temp2;
+
+ // Increment data pointer for next row
+ InputData += short_pitch ;
+ ip += 8;
+ }
+
+ // Performed DCT on rows, now transform the columns
+ ip = InterData;
+ for (loop = 0; loop < 8; loop++)
+ {
+ // Pre calculate some common sums and differences.
+ is07 = ip[0 * 8] + ip[7 * 8];
+ is12 = ip[1 * 8] + ip[2 * 8];
+ is34 = ip[3 * 8] + ip[4 * 8];
+ is56 = ip[5 * 8] + ip[6 * 8];
+
+ id07 = ip[0 * 8] - ip[7 * 8];
+ id12 = ip[1 * 8] - ip[2 * 8];
+ id34 = ip[3 * 8] - ip[4 * 8];
+ id56 = ip[5 * 8] - ip[6 * 8];
+
+ is0734 = is07 + is34;
+ is1256 = is12 + is56;
+
+ // Pre-Calculate some common product terms
+ icommon_product1 = xC4S4*(is12 - is56) ;
+ icommon_product2 = xC4S4*(id12 + id56) ;
+ DOROUND(icommon_product1)
+ DOROUND(icommon_product2)
+ icommon_product1>>=SHIFT_BITS;
+ icommon_product2>>=SHIFT_BITS;
+
+
+ temp1 = xC4S4*(is0734 + is1256) ;
+ temp2 = xC4S4*(is0734 - is1256) ;
+ DOROUND(temp1);
+ DOROUND(temp2);
+ temp1>>=SHIFT_BITS;
+
+ temp2>>=SHIFT_BITS;
+ op[0*8] = (temp1 + FINAL_ROUNDING)>>FINAL_SHIFT;
+ op[4*8] = (temp2 + FINAL_ROUNDING)>>FINAL_SHIFT;
+
+ // Define inputs to rotation for outputs 2 and 6
+ irot_input_x = id12 - id56;
+ irot_input_y = is07 - is34;
+
+ // Apply rotation for outputs 2 and 6.
+ temp1=xC6S2*irot_input_x;
+ DOROUND(temp1);
+ temp1>>=SHIFT_BITS;
+ temp2=xC2S6*irot_input_y;
+ DOROUND(temp2);
+ temp2>>=SHIFT_BITS;
+ op[2*8] = (temp1 + temp2 + FINAL_ROUNDING)>>FINAL_SHIFT;
+
+ temp1=xC6S2*irot_input_y;
+ DOROUND(temp1);
+ temp1>>=SHIFT_BITS;
+ temp2=xC2S6*irot_input_x ;
+ DOROUND(temp2);
+ temp2>>=SHIFT_BITS;
+ op[6*8] = (temp1 -temp2 + FINAL_ROUNDING)>>FINAL_SHIFT ;
+
+ // Define inputs to rotation for outputs 1 and 7
+ irot_input_x = icommon_product1 + id07;
+ irot_input_y = -( id34 + icommon_product2 );
+
+ // Apply rotation for outputs 1 and 7.
+ temp1=xC1S7*irot_input_x;
+ DOROUND(temp1);
+ temp1>>=SHIFT_BITS;
+ temp2=xC7S1*irot_input_y;
+ DOROUND(temp2);
+ temp2>>=SHIFT_BITS;
+ op[1*8] = (temp1 - temp2 + FINAL_ROUNDING)>>FINAL_SHIFT;
+
+ temp1=xC7S1*irot_input_x;
+ DOROUND(temp1);
+ temp1>>=SHIFT_BITS;
+ temp2=xC1S7*irot_input_y ;
+ DOROUND(temp2);
+ temp2>>=SHIFT_BITS;
+ op[7*8] = (temp1 + temp2 + FINAL_ROUNDING)>>FINAL_SHIFT;
+
+ // Define inputs to rotation for outputs 3 and 5
+ irot_input_x = id07 - icommon_product1;
+ irot_input_y = id34 - icommon_product2;
+
+ // Apply rotation for outputs 3 and 5.
+ temp1=xC3S5*irot_input_x;
+ DOROUND(temp1);
+ temp1>>=SHIFT_BITS;
+ temp2=xC5S3*irot_input_y ;
+ DOROUND(temp2);
+ temp2>>=SHIFT_BITS;
+ op[3*8] = (temp1 - temp2 + FINAL_ROUNDING)>>FINAL_SHIFT ;
+
+
+ temp1=xC5S3*irot_input_x;
+ DOROUND(temp1);
+ temp1>>=SHIFT_BITS;
+ temp2=xC3S5*irot_input_y;
+ DOROUND(temp2);
+ temp2>>=SHIFT_BITS;
+ op[5*8] = (temp1 + temp2 + FINAL_ROUNDING)>>FINAL_SHIFT;
+
+ // Increment data pointer for next column.
+ ip ++;
+ op ++;
+ }
+}
+#else
void vp8_short_fdct8x8_c(short *block, short *coefs, int pitch)
{
@@ -102,7 +345,7 @@ void vp8_short_fdct8x8_c(short *block, short *coefs, int pitch)
return;
}
-
+#endif
void vp8_short_fhaar2x2_c(short *input, short *output, int pitch) //pitch = 8
{
@@ -214,4 +457,4 @@ void vp8_short_walsh4x4_c(short *input, short *output, int pitch)
ip += 4;
op += 4;
}
-}
+}
\ No newline at end of file
diff --git a/vp8/encoder/encodemb.c b/vp8/encoder/encodemb.c
index ae8ab8846fb9d6baa06d199dbcdf4d8770ae792d..81c69d9f85383eac8c585d1f0f74e11297687678 100644
--- a/vp8/encoder/encodemb.c
+++ b/vp8/encoder/encodemb.c
@@ -239,7 +239,9 @@ void vp8_transform_mbuv_8x8(MACROBLOCK *x)
{
int i;
+#if !CONFIG_INT_8X8FDCT
vp8_clear_system_state();
+#endif
for (i = 16; i < 24; i += 4)
{
@@ -252,9 +254,9 @@ void vp8_transform_mbuv_8x8(MACROBLOCK *x)
void vp8_transform_intra_mby_8x8(MACROBLOCK *x)//changed
{
int i;
-
+#if !CONFIG_INT_8X8FDCT
vp8_clear_system_state();
-
+#endif
for (i = 0; i < 9; i += 8)
{
x->vp8_short_fdct8x8(&x->block[i].src_diff[0],
@@ -279,9 +281,9 @@ void vp8_transform_intra_mby_8x8(MACROBLOCK *x)//changed
void vp8_transform_mb_8x8(MACROBLOCK *x)
{
int i;
-
+#if !CONFIG_INT_8X8FDCT
vp8_clear_system_state();
-
+#endif
for (i = 0; i < 9; i += 8)
{
x->vp8_short_fdct8x8(&x->block[i].src_diff[0],
@@ -312,9 +314,9 @@ void vp8_transform_mb_8x8(MACROBLOCK *x)
void vp8_transform_mby_8x8(MACROBLOCK *x)
{
int i;
-
+#if !CONFIG_INT_8X8FDCT
vp8_clear_system_state();
-
+#endif
for (i = 0; i < 9; i += 8)
{
x->vp8_short_fdct8x8(&x->block[i].src_diff[0],