Sync with mplayer's stuff

Originally committed as revision 14 to svn://svn.ffmpeg.org/ffmpeg/trunk

8 files changed, 384 insertions, 26 deletions

diff --git a/bswap.h b/bswap.h
new file mode 100644
index 0000000000..2318afdbb8
--- /dev/null
+++ b/bswap.h
@@ -0,0 +1,92 @@
+#ifndef __BSWAP_H__
+#define __BSWAP_H__
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifdef HAVE_BYTESWAP_H
+#include <byteswap.h>
+#else
+
+#include <inttypes.h>
+
+#ifdef ARCH_X86
+inline static unsigned short ByteSwap16(unsigned short x)
+{
+  __asm("xchgb %b0,%h0"	:
+        "=q" (x)	:
+        "0" (x));
+    return x;
+}
+#define bswap_16(x) ByteSwap16(x)
+
+inline static unsigned int ByteSwap32(unsigned int x)
+{
+#if __CPU__ > 386
+ __asm("bswap	%0":
+      "=r" (x)     :
+#else
+ __asm("xchgb	%b0,%h0\n"
+      "	rorl	$16,%0\n"
+      "	xchgb	%b0,%h0":
+      "=q" (x)		:
+#endif
+      "0" (x));
+  return x;
+}
+#define bswap_32(x) ByteSwap32(x)
+
+inline static unsigned long long int ByteSwap64(unsigned long long int x)
+{
+  register union { __extension__ unsigned long long int __ll;
+          unsigned long int __l[2]; } __x;
+  asm("xchgl	%0,%1":
+      "=r"(__x.__l[0]),"=r"(__x.__l[1]):
+      "0"(bswap_32((unsigned long)x)),"1"(bswap_32((unsigned long)(x>>32))));
+  return __x.__ll;
+}
+#define bswap_64(x) ByteSwap64(x)
+
+#else
+
+#define bswap_16(x) (((x) & 0x00ff) << 8 | ((x) & 0xff00) >> 8)
+			
+
+// code from bits/byteswap.h (C) 1997, 1998 Free Software Foundation, Inc.
+#define bswap_32(x) \
+     ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >>  8) | \
+      (((x) & 0x0000ff00) <<  8) | (((x) & 0x000000ff) << 24))
+
+#define bswap_64(x) \
+     (__extension__						\
+      ({ union { __extension__ unsigned long long int __ll;	\
+                 unsigned long int __l[2]; } __w, __r;		\
+         __w.__ll = (x);					\
+         __r.__l[0] = bswap_32 (__w.__l[1]);			\
+         __r.__l[1] = bswap_32 (__w.__l[0]);			\
+         __r.__ll; }))
+#endif	/* !ARCH_X86 */
+
+#endif	/* !HAVE_BYTESWAP_H */
+
+// be2me ... BigEndian to MachineEndian
+// le2me ... LittleEndian to MachineEndian
+
+#ifdef WORDS_BIGENDIAN
+#define be2me_16(x) (x)
+#define be2me_32(x) (x)
+#define be2me_64(x) (x)
+#define le2me_16(x) bswap_16(x)
+#define le2me_32(x) bswap_32(x)
+#define le2me_64(x) bswap_64(x)
+#else
+#define be2me_16(x) bswap_16(x)
+#define be2me_32(x) bswap_32(x)
+#define be2me_64(x) bswap_64(x)
+#define le2me_16(x) (x)
+#define le2me_32(x) (x)
+#define le2me_64(x) (x)
+#endif
+
+#endif
diff --git a/configure b/configure
index 568e24df35..f357bec9c3 100755
--- a/configure
+++ b/configure
@@ -58,10 +58,15 @@ echo "Creating config.mak and config.h"
 echo "# Automatically generated by configure - do not modify" > config.mak
 echo "/* Automatically generated by configure - do not modify */" > config.h
 
+# Checking for CFLAGS
+if test -z "$CFLAGS"; then
+ CFLAGS="-O2"
+fi
+
 echo "prefix=$prefix" >> config.mak
 echo "CC=$cc" >> config.mak
 echo "AR=$ar" >> config.mak
-echo "OPTFLAGS=-O2" >> config.mak
+echo "OPTFLAGS=$CFLAGS" >> config.mak
 if [ "$cpu" = "x86" ] ; then
   echo "TARGET_ARCH_X86=yes" >> config.mak
   echo "#define ARCH_X86 1" >> config.h
@@ -74,6 +79,7 @@ if [ "$gprof" = "yes" ] ; then
   echo "TARGET_GPROF=yes" >> config.mak
   echo "#define HAVE_GPROF 1" >> config.h
 fi
+echo "#define BIN_PORTABILITY 1 /*undefine it if you want to get maximal performance*/" >> config.h
 
 # if you do not want to use encoders, disable that.
 echo "#define CONFIG_ENCODERS 1" >> config.h
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 3c79f403f8..3765bc841a 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -1,6 +1,6 @@
 include ../config.mak
 
-CFLAGS= $(OPTFLAGS) -Wall -g
+CFLAGS= $(OPTFLAGS) -Wall -g -DHAVE_CONFIG_H
 LDFLAGS= -g
 
 OBJS= common.o utils.o mpegvideo.o h263.o jrevdct.o jfdctfst.o \
diff --git a/libavcodec/common.c b/libavcodec/common.c
index b9365c9d8d..2f54b80b3d 100644
--- a/libavcodec/common.c
+++ b/libavcodec/common.c
@@ -29,6 +29,8 @@
 #define NDEBUG
 #include <assert.h>
 
+#include "../bswap.h"
+
 void init_put_bits(PutBitContext *s, 
                    UINT8 *buffer, int buffer_size,
                    void *opaque,
@@ -222,10 +224,14 @@ unsigned int get_bits(GetBitContext *s, int n)
         buf_ptr += 4;
         /* handle common case: we can read everything */
         if (buf_ptr <= s->buf_end) {
-            bit_buf = (buf_ptr[-4] << 24) |
-                (buf_ptr[-3] << 16) |
+#if ARCH_X86
+	    bit_buf = bswap_32(*((unsigned long*)(&buf_ptr[-4])));
+#else
+	    bit_buf = (buf_ptr[-4] << 24) |
+		(buf_ptr[-3] << 16) |
                 (buf_ptr[-2] << 8) |
-                (buf_ptr[-1]);
+                (buf_ptr[-1]);	    
+#endif
         } else {
             buf_ptr -= 4;
             bit_buf = 0;
diff --git a/libavcodec/i386/dsputil_mmx.c b/libavcodec/i386/dsputil_mmx.c
index 18cb03e0e8..d4a07c3a77 100644
--- a/libavcodec/i386/dsputil_mmx.c
+++ b/libavcodec/i386/dsputil_mmx.c
@@ -30,8 +30,10 @@ int pix_abs16x16_y2_mmx(UINT8 *blk1, UINT8 *blk2, int lx, int h);
 int pix_abs16x16_xy2_mmx(UINT8 *blk1, UINT8 *blk2, int lx, int h);
 
 /* pixel operations */
-static const unsigned short mm_wone[4] __attribute__ ((aligned(8))) = { 0x1, 0x1, 0x1, 0x1 };
-static const unsigned short mm_wtwo[4] __attribute__ ((aligned(8))) = { 0x2, 0x2, 0x2, 0x2 };
+static const unsigned long long int mm_wone __attribute__ ((aligned(8))) = 0x0001000100010001;
+static const unsigned long long int mm_wtwo __attribute__ ((aligned(8))) = 0x0002000200020002;
+//static const unsigned short mm_wone[4] __attribute__ ((aligned(8))) = { 0x1, 0x1, 0x1, 0x1 };
+//static const unsigned short mm_wtwo[4] __attribute__ ((aligned(8))) = { 0x2, 0x2, 0x2, 0x2 };
 
 /***********************************/
 /* 3Dnow specific */
@@ -215,7 +217,7 @@ static void put_pixels_x2_mmx(UINT8 *block, const UINT8 *pixels, int line_size,
   __asm __volatile(
 	"pxor	%%mm7, %%mm7\n\t"
 	"movq	%0, %%mm4\n\t"
-	::"m"(mm_wone[0]):"memory");
+	::"m"(mm_wone):"memory");
   do {
     __asm __volatile(
 	"movq	%1, %%mm0\n\t"
@@ -250,7 +252,7 @@ static void put_pixels_y2_mmx(UINT8 *block, const UINT8 *pixels, int line_size,
   __asm __volatile(
 	"pxor	%%mm7, %%mm7\n\t"
 	"movq	%0, %%mm4\n\t"
-	::"m"(mm_wone[0]):"memory");
+	::"m"(mm_wone):"memory");
   do {
     __asm __volatile(
 	"movq	%1, %%mm0\n\t"
@@ -287,7 +289,7 @@ static void put_pixels_xy2_mmx(UINT8 *block, const UINT8 *pixels, int line_size,
   __asm __volatile(
 	"pxor	%%mm7, %%mm7\n\t"
 	"movq	%0, %%mm6\n\t"
-	::"m"(mm_wtwo[0]):"memory");
+	::"m"(mm_wtwo):"memory");
   do {
     __asm __volatile(
 	"movq	%1, %%mm0\n\t"
@@ -399,7 +401,7 @@ static void   put_no_rnd_pixels_xy2_mmx( UINT8  *block, const UINT8 *pixels, int
   __asm __volatile(
 	"pxor	%%mm7, %%mm7\n\t"
 	"movq	%0, %%mm6\n\t"
-	::"m"(mm_wone[0]):"memory");
+	::"m"(mm_wone):"memory");
   do {
     __asm __volatile(
 	"movq	%1, %%mm0\n\t"
@@ -448,7 +450,7 @@ static void avg_pixels_mmx(UINT8 *block, const UINT8 *pixels, int line_size, int
   __asm __volatile(
 	"pxor	%%mm7, %%mm7\n\t"
 	"movq	%0, %%mm6\n\t"
-	::"m"(mm_wone[0]):"memory");
+	::"m"(mm_wone):"memory");
   do {
     __asm __volatile(
 	"movq	%0, %%mm0\n\t"
@@ -485,7 +487,7 @@ static void   avg_pixels_x2_mmx( UINT8  *block, const UINT8 *pixels, int line_si
   __asm __volatile(
 	"pxor	%%mm7, %%mm7\n\t"
 	"movq	%0, %%mm6\n\t"
-	::"m"(mm_wone[0]):"memory");
+	::"m"(mm_wone):"memory");
   do {
     __asm __volatile(
 	"movq	%1, %%mm1\n\t"
@@ -531,7 +533,7 @@ static void   avg_pixels_y2_mmx( UINT8  *block, const UINT8 *pixels, int line_si
   __asm __volatile(
 	"pxor	%%mm7, %%mm7\n\t"
 	"movq	%0, %%mm6\n\t"
-	::"m"(mm_wone[0]):"memory");
+	::"m"(mm_wone):"memory");
   do {
     __asm __volatile(
 	"movq	%1, %%mm1\n\t"
@@ -577,7 +579,7 @@ static void   avg_pixels_xy2_mmx( UINT8  *block, const UINT8 *pixels, int line_s
   __asm __volatile(
 	"pxor	%%mm7, %%mm7\n\t"
 	"movq	%0, %%mm6\n\t"
-	::"m"(mm_wtwo[0]):"memory");
+	::"m"(mm_wtwo):"memory");
   do {
     __asm __volatile(
 	"movq	%1, %%mm0\n\t"
@@ -621,7 +623,7 @@ static void   avg_pixels_xy2_mmx( UINT8  *block, const UINT8 *pixels, int line_s
 	"movq	%%mm0, %0\n\t"
 	:"=m"(*p)
 	:"m"(*pix),
-	 "m"(*(pix+line_size)), "m"(mm_wone[0])
+	 "m"(*(pix+line_size)), "m"(mm_wone)
 	:"memory");
    pix += line_size;
    p +=   line_size ;
@@ -748,7 +750,7 @@ static void   avg_no_rnd_pixels_xy2_mmx( UINT8  *block, const UINT8 *pixels, int
   __asm __volatile(
 	"pxor	%%mm7, %%mm7\n\t"
 	"movq	%0, %%mm6\n\t"
-	::"m"(mm_wone[0]):"memory");
+	::"m"(mm_wone):"memory");
   do {
     __asm __volatile(
 	"movq	%1, %%mm0\n\t"
@@ -832,7 +834,7 @@ static void sub_pixels_x2_mmx( DCTELEM  *block, const UINT8 *pixels, int line_si
   __asm __volatile(
       "pxor	%%mm7, %%mm7\n\t"
       "movq	%0, %%mm6"
-      ::"m"(mm_wone[0]):"memory");
+      ::"m"(mm_wone):"memory");
   do {
     __asm __volatile(
 	"movq	%0, %%mm0\n\t"
@@ -872,7 +874,7 @@ static void sub_pixels_y2_mmx( DCTELEM  *block, const UINT8 *pixels, int line_si
   __asm __volatile(
       "pxor	%%mm7, %%mm7\n\t"
       "movq	%0, %%mm6"
-      ::"m"(mm_wone[0]):"memory");
+      ::"m"(mm_wone):"memory");
   do {
     __asm __volatile(
 	"movq	%0, %%mm0\n\t"
@@ -912,7 +914,7 @@ static void   sub_pixels_xy2_mmx( DCTELEM  *block, const UINT8 *pixels, int line
   __asm __volatile(
 	"pxor	%%mm7, %%mm7\n\t"
 	"movq	%0, %%mm6\n\t"
-	::"m"(mm_wtwo[0]):"memory");
+	::"m"(mm_wtwo):"memory");
   do {
     __asm __volatile(
 	"movq	%1, %%mm0\n\t"
diff --git a/libavcodec/i386/dsputil_mmx_avg.h b/libavcodec/i386/dsputil_mmx_avg.h
index 99e806a714..5cd640f713 100644
--- a/libavcodec/i386/dsputil_mmx_avg.h
+++ b/libavcodec/i386/dsputil_mmx_avg.h
@@ -243,7 +243,7 @@ static void DEF(avg_pixels_xy2)( UINT8  *block, const UINT8 *pixels, int line_si
   __asm __volatile(
 	"pxor	%%mm7, %%mm7\n\t"
 	"movq	%0, %%mm6\n\t"
-	::"m"(mm_wtwo[0]):"memory");
+	::"m"(mm_wtwo):"memory");
   do {
     __asm __volatile(
 	"movq	%1, %%mm0\n\t"
diff --git a/libavcodec/i386/mpegvideo.c b/libavcodec/i386/mpegvideo.c
new file mode 100644
index 0000000000..d9e5e5c114
--- /dev/null
+++ b/libavcodec/i386/mpegvideo.c
@@ -0,0 +1,239 @@
+/*
+ * The simplest mpeg encoder (well, it was the simplest!)
+ * Copyright (c) 2000,2001 Gerard Lantau.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Optimized for ia32 cpus by Nick Kurshev <nickols_k@mail.ru>
+ */
+
+void MPV_frame_start(MpegEncContext *s)
+{
+    if (s->pict_type == B_TYPE) {
+	__asm __volatile(
+	    "movl	(%1), %%eax\n\t"
+	    "movl	4(%1), %%edx\n\t"
+	    "movl	8(%1), %%ecx\n\t"
+	    "movl	%%eax, (%0)\n\t"
+	    "movl	%%edx, 4(%0)\n\t"
+	    "movl	%%ecx, 8(%0)\n\t"
+	    :
+	    :"r"(s->current_picture), "r"(s->aux_picture)
+	    :"eax","edx","ecx","memory");
+    } else {
+            /* swap next and last */
+	__asm __volatile(
+	    "movl	(%1), %%eax\n\t"
+	    "movl	4(%1), %%edx\n\t"
+	    "movl	8(%1), %%ecx\n\t"
+	    "xchgl	(%0), %%eax\n\t"
+	    "xchgl	4(%0), %%edx\n\t"
+	    "xchgl	8(%0), %%ecx\n\t"
+	    "movl	%%eax, (%1)\n\t"
+	    "movl	%%edx, 4(%1)\n\t"
+	    "movl	%%ecx, 8(%1)\n\t"
+	    "movl	%%eax, (%2)\n\t"
+	    "movl	%%edx, 4(%2)\n\t"
+	    "movl	%%ecx, 8(%2)\n\t"
+	    :
+	    :"r"(s->last_picture), "r"(s->next_picture), "r"(s->current_picture)
+	    :"eax","edx","ecx","memory");
+    }
+}
+
+static void dct_unquantize(MpegEncContext *s, DCTELEM *block, int n, int qscale);
+
+#ifdef HAVE_MMX 
+static const unsigned long long int mm_wabs __attribute__ ((aligned(8))) = 0xffffffffffffffffULL;
+static const unsigned long long int mm_wone __attribute__ ((aligned(8))) = 0x0001000100010001ULL;
+
+/*
+  NK:
+  Note: looking at PARANOID:
+  "enable all paranoid tests for rounding, overflows, etc..."
+
+#ifdef PARANOID
+                if (level < -2048 || level > 2047)
+                    fprintf(stderr, "unquant error %d %d\n", i, level);
+#endif
+  We can suppose that result of two multiplications can't be greate of 0xFFFF
+  i.e. is 16-bit, so we use here only PMULLW instruction and can avoid
+  a complex multiplication.
+=====================================================
+ Full formula for multiplication of 2 integer numbers
+ which are represent as high:low words:
+ input: value1 = high1:low1
+        value2 = high2:low2
+ output: value3 = value1*value2
+ value3=high3:low3 (on overflow: modulus 2^32 wrap-around)
+ this mean that for 0x123456 * 0x123456 correct result is 0x766cb0ce4
+ but this algorithm will compute only 0x66cb0ce4
+ this limited by 16-bit size of operands
+ ---------------------------------
+ tlow1 = high1*low2
+ tlow2 = high2*low1
+ tlow1 = tlow1 + tlow2
+ high3:low3 = low1*low2
+ high3 += tlow1
+*/
+#ifdef BIN_PORTABILITY
+static void dct_unquantize_mmx
+#else
+#define HAVE_DCT_UNQUANTIZE 1
+static void dct_unquantize
+#endif
+(MpegEncContext *s,DCTELEM *block, int n, int qscale)
+{
+    int i, level;
+    const UINT16 *quant_matrix;
+    if (s->mb_intra) {
+        if (n < 4) 
+            block[0] = block[0] * s->y_dc_scale;
+        else
+            block[0] = block[0] * s->c_dc_scale;
+        if (s->out_format == FMT_H263) {
+            i = 1;
+            goto unquant_even;
+        }
+        /* XXX: only mpeg1 */
+        quant_matrix = s->intra_matrix;
+	i=1;
+	/* Align on 4 elements boundary */
+	while(i&3)
+	{
+            level = block[i];
+            if (level) {
+                if (level < 0) level = -level;
+                    level = (int)(level * qscale * quant_matrix[i]) >> 3;
+                    level = (level - 1) | 1;
+                if (block[i] < 0) level = -level;
+                block[i] = level;
+            }
+	    i++;
+	}
+	__asm __volatile(
+	"movd	%0, %%mm6\n\t"       /* mm6 = qscale | 0  */
+	"punpckldq %%mm6, %%mm6\n\t" /* mm6 = qscale | qscale */
+	"movq	%2, %%mm4\n\t"
+	"movq	%%mm6, %%mm7\n\t"
+	"movq	%1, %%mm5\n\t"
+	"packssdw %%mm6, %%mm7\n\t" /* mm7 = qscale | qscale | qscale | qscale */
+	"pxor	%%mm6, %%mm6\n\t"
+	::"g"(qscale),"m"(mm_wone),"m"(mm_wabs):"memory");
+        for(;i<64;i+=4) {
+		__asm __volatile(
+			"movq	%1, %%mm0\n\t"
+			"movq	%%mm7, %%mm1\n\t"
+			"movq	%%mm0, %%mm2\n\t"
+			"movq	%%mm0, %%mm3\n\t"
+			"pcmpgtw %%mm6, %%mm2\n\t"
+			"pmullw	%2, %%mm1\n\t"
+			"pandn	%%mm4, %%mm2\n\t"
+			"por	%%mm5, %%mm2\n\t"  
+			"pmullw	%%mm2, %%mm0\n\t" /* mm0 = abs(block[i]). */
+			
+			"pcmpeqw %%mm6, %%mm3\n\t"
+			"pmullw	%%mm0, %%mm1\n\t"
+			"psraw	$3, %%mm1\n\t"
+			"psubw	%%mm5, %%mm1\n\t"   /* block[i] --; */
+			"pandn	%%mm4, %%mm3\n\t"  /* fake of pcmpneqw : mm0 != 0 then mm1 = -1 */
+			"por	%%mm5, %%mm1\n\t"   /* block[i] |= 1 */
+			"pmullw %%mm2, %%mm1\n\t"   /* change signs again */
+
+			"pand	%%mm3, %%mm1\n\t" /* nullify if was zero */
+			"movq	%%mm1, %0"
+			:"=m"(block[i])
+			:"m"(block[i]), "m"(quant_matrix[i])
+			:"memory");
+        }
+    } else {
+        i = 0;
+    unquant_even:
+        quant_matrix = s->non_intra_matrix;
+	/* Align on 4 elements boundary */
+	while(i&3)
+	{
+	    level = block[i];
+            if (level) {
+                if (level < 0) level = -level;
+                    level = (((level << 1) + 1) * qscale *
+                             ((int) quant_matrix[i])) >> 4;
+                    level = (level - 1) | 1;
+                if(block[i] < 0) level = -level;
+                block[i] = level;
+	    }
+	    i++;
+	}
+	__asm __volatile(
+	"movd	%0, %%mm6\n\t"       /* mm6 = qscale | 0  */
+	"punpckldq %%mm6, %%mm6\n\t" /* mm6 = qscale | qscale */
+	"movq	%2, %%mm4\n\t"
+	"movq	%%mm6, %%mm7\n\t"
+	"movq	%1, %%mm5\n\t"
+	"packssdw %%mm6, %%mm7\n\t" /* mm7 = qscale | qscale | qscale | qscale */
+	"pxor	%%mm6, %%mm6\n\t"
+	::"g"(qscale),"m"(mm_wone),"m"(mm_wabs):"memory");
+        for(;i<64;i+=4) {
+		__asm __volatile(
+			"movq	%1, %%mm0\n\t"
+			"movq	%%mm7, %%mm1\n\t"
+			"movq	%%mm0, %%mm2\n\t"
+			"movq	%%mm0, %%mm3\n\t"
+			"pcmpgtw %%mm6, %%mm2\n\t"
+			"pmullw	%2, %%mm1\n\t"
+			"pandn	%%mm4, %%mm2\n\t"
+			"por	%%mm5, %%mm2\n\t"  
+			"pmullw	%%mm2, %%mm0\n\t" /* mm0 = abs(block[i]). */
+			"psllw	$1, %%mm0\n\t" /* block[i] <<= 1 */
+			"paddw	%%mm5, %%mm0\n\t" /* block[i] ++ */
+			
+			"pmullw	%%mm0, %%mm1\n\t"
+			"psraw	$4, %%mm1\n\t"
+			"pcmpeqw %%mm6, %%mm3\n\t"
+			"psubw	%%mm5, %%mm1\n\t"   /* block[i] --; */
+			"pandn	%%mm4, %%mm3\n\t"  /* fake of pcmpneqw : mm0 != 0 then mm1 = -1 */
+			"por	%%mm5, %%mm1\n\t"   /* block[i] |= 1 */
+			"pmullw %%mm2, %%mm1\n\t"   /* change signs again */
+
+			"pand	%%mm3, %%mm1\n\t" /* nullify if was zero */
+			"movq	%%mm1, %0"
+			:"=m"(block[i])
+			:"m"(block[i]), "m"(quant_matrix[i])
+			:"memory");
+        }
+    }
+}
+
+#ifdef BIN_PORTABILITY
+static void (*dct_unquantize_ptr)(MpegEncContext *s, 
+                		    DCTELEM *block, int n, int qscale);
+
+void MPV_common_init_mmx(void)
+{
+  int mm_flags;
+  mm_flags = mm_support();
+  if (mm_flags & MM_MMX) {
+    dct_unquantize_ptr = dct_unquantize_mmx;
+  }
+  else {
+    dct_unquantize_ptr = dct_unquantize;
+  }
+}
+
+#define DCT_UNQUANTIZE(a,b,c,d) (*dct_unquantize_ptr)(a,b,c,d)
+#else
+#define DCT_UNQUANTIZE(a,b,c,d) dct_unquantize(a,b,c,d)
+#endif /* BIN_PORTABILITY */
+#endif /* HAVE_MMX */
diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c
index dc053de426..8f56f0def2 100644
--- a/libavcodec/mpegvideo.c
+++ b/libavcodec/mpegvideo.c
@@ -24,6 +24,15 @@
 #include "dsputil.h"
 #include "mpegvideo.h"
 
+#include "../config.h"
+
+#ifdef ARCH_X86
+#include "i386/mpegvideo.c"
+#endif
+#ifndef DCT_UNQUANTIZE
+#define DCT_UNQUANTIZE(a,b,c,d) dct_unquantize(a,b,c,d)
+#endif
+
 #define EDGE_WIDTH 16
 
 /* enable all paranoid tests for rounding, overflows, etc... */
@@ -89,6 +98,9 @@ int MPV_common_init(MpegEncContext *s)
     int c_size, i;
     UINT8 *pict;
 
+#if defined ( HAVE_MMX ) && defined ( BIN_PORTABILITY )
+    MPV_common_init_mmx();
+#endif
     s->mb_width = (s->width + 15) / 16;
     s->mb_height = (s->height + 15) / 16;
     s->linesize = s->mb_width * 16 + 2 * EDGE_WIDTH;
@@ -345,8 +357,8 @@ static void draw_edges(UINT8 *buf, int wrap, int width, int height, int w)
     }
 }
 
-
 /* generic function for encode/decode called before a frame is coded/decoded */
+#ifndef ARCH_X86
 void MPV_frame_start(MpegEncContext *s)
 {
     int i;
@@ -366,7 +378,7 @@ void MPV_frame_start(MpegEncContext *s)
         }
     }
 }
-
+#endif
 /* generic function for encode/decode called after a frame has been coded/decoded */
 void MPV_frame_end(MpegEncContext *s)
 {
@@ -621,7 +633,7 @@ static inline void put_dct(MpegEncContext *s,
                            DCTELEM *block, int i, UINT8 *dest, int line_size)
 {
     if (!s->mpeg2)
-        dct_unquantize(s, block, i, s->qscale);
+        DCT_UNQUANTIZE(s, block, i, s->qscale);
     j_rev_dct (block);
     put_pixels_clamped(block, dest, line_size);
 }
@@ -632,7 +644,7 @@ static inline void add_dct(MpegEncContext *s,
 {
     if (s->block_last_index[i] >= 0) {
         if (!s->mpeg2)
-            dct_unquantize(s, block, i, s->qscale);
+            DCT_UNQUANTIZE(s, block, i, s->qscale);
         j_rev_dct (block);
         add_pixels_clamped(block, dest, line_size);
     }
@@ -1109,6 +1121,7 @@ static int dct_quantize_mmx(MpegEncContext *s,
     return last_non_zero;
 }
 
+#ifndef HAVE_DCT_UNQUANTIZE
 static void dct_unquantize(MpegEncContext *s, 
                            DCTELEM *block, int n, int qscale)
 {
@@ -1172,7 +1185,7 @@ static void dct_unquantize(MpegEncContext *s,
         }
     }
 }
-                         
+#endif                         
 
 /* rate control */