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FFmpeg
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Sync with mplayer's stuff 

Originally committed as revision 14 to svn://svn.ffmpeg.org/ffmpeg/trunk
tags/v0.5
Nick Kurshev 24 years ago
parent
3bb4e23a8a
commit
a9b3f63084
8 changed files with 384 additions and 26 deletions
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  1. +92
    -0
      bswap.h
  2. +7
    -1
      configure
  3. +1
    -1
      libavcodec/Makefile
  4. +9
    -3
      libavcodec/common.c
  5. +17
    -15
      libavcodec/i386/dsputil_mmx.c
  6. +1
    -1
      libavcodec/i386/dsputil_mmx_avg.h
  7. +239
    -0
      libavcodec/i386/mpegvideo.c
  8. +18
    -5
      libavcodec/mpegvideo.c

+ 92
- 0
bswap.h View File

@@ -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

+ 7
- 1
configure View File

@@ -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


+ 1
- 1
libavcodec/Makefile View File

@@ -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 \


+ 9
- 3
libavcodec/common.c View File

@@ -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;


+ 17
- 15
libavcodec/i386/dsputil_mmx.c View File

@@ -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"


+ 1
- 1
libavcodec/i386/dsputil_mmx_avg.h View File

@@ -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"


+ 239
- 0
libavcodec/i386/mpegvideo.c View File

@@ -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 */

+ 18
- 5
libavcodec/mpegvideo.c View File

@@ -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 */



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