Commit e6bc38fd authored by Ronald S. Bultje's avatar Ronald S. Bultje
Browse files

wmv2: move IDCT to its own DSP context.

This allows us to remove FF_IDCT_WMV2, which serves no practical purpose
other than to be able to select the WMV2 IDCT for MPEG (or vice versa)
and get corrupt output.

Fate tests for all wmv2-related tests change, because (for some obscure
reason) they forced use of the MPEG IDCT. You would get the same changes
previously by not using -idct simple in the fate test (or replacing it
with -idct auto).
parent 8a4f2620
......@@ -410,10 +410,10 @@ OBJS-$(CONFIG_WMAVOICE_DECODER) += wmavoice.o \
celp_filters.o \
acelp_vectors.o acelp_filters.o
OBJS-$(CONFIG_WMV1_DECODER) += msmpeg4.o msmpeg4data.o
OBJS-$(CONFIG_WMV2_DECODER) += wmv2dec.o wmv2.o \
OBJS-$(CONFIG_WMV2_DECODER) += wmv2dec.o wmv2.o wmv2dsp.o \
msmpeg4.o msmpeg4data.o \
intrax8.o intrax8dsp.o
OBJS-$(CONFIG_WMV2_ENCODER) += wmv2enc.o wmv2.o \
OBJS-$(CONFIG_WMV2_ENCODER) += wmv2enc.o wmv2.o wmv2dsp.o \
msmpeg4.o msmpeg4enc.o msmpeg4data.o \
mpeg4videodec.o ituh263dec.o h263dec.o
OBJS-$(CONFIG_WNV1_DECODER) += wnv1.o
......
......@@ -2482,90 +2482,6 @@ static void vector_clip_int32_c(int32_t *dst, const int32_t *src, int32_t min,
} while (len > 0);
}
#define W0 2048
#define W1 2841 /* 2048*sqrt (2)*cos (1*pi/16) */
#define W2 2676 /* 2048*sqrt (2)*cos (2*pi/16) */
#define W3 2408 /* 2048*sqrt (2)*cos (3*pi/16) */
#define W4 2048 /* 2048*sqrt (2)*cos (4*pi/16) */
#define W5 1609 /* 2048*sqrt (2)*cos (5*pi/16) */
#define W6 1108 /* 2048*sqrt (2)*cos (6*pi/16) */
#define W7 565 /* 2048*sqrt (2)*cos (7*pi/16) */
static void wmv2_idct_row(short * b)
{
int s1,s2;
int a0,a1,a2,a3,a4,a5,a6,a7;
/*step 1*/
a1 = W1*b[1]+W7*b[7];
a7 = W7*b[1]-W1*b[7];
a5 = W5*b[5]+W3*b[3];
a3 = W3*b[5]-W5*b[3];
a2 = W2*b[2]+W6*b[6];
a6 = W6*b[2]-W2*b[6];
a0 = W0*b[0]+W0*b[4];
a4 = W0*b[0]-W0*b[4];
/*step 2*/
s1 = (181*(a1-a5+a7-a3)+128)>>8;//1,3,5,7,
s2 = (181*(a1-a5-a7+a3)+128)>>8;
/*step 3*/
b[0] = (a0+a2+a1+a5 + (1<<7))>>8;
b[1] = (a4+a6 +s1 + (1<<7))>>8;
b[2] = (a4-a6 +s2 + (1<<7))>>8;
b[3] = (a0-a2+a7+a3 + (1<<7))>>8;
b[4] = (a0-a2-a7-a3 + (1<<7))>>8;
b[5] = (a4-a6 -s2 + (1<<7))>>8;
b[6] = (a4+a6 -s1 + (1<<7))>>8;
b[7] = (a0+a2-a1-a5 + (1<<7))>>8;
}
static void wmv2_idct_col(short * b)
{
int s1,s2;
int a0,a1,a2,a3,a4,a5,a6,a7;
/*step 1, with extended precision*/
a1 = (W1*b[8*1]+W7*b[8*7] + 4)>>3;
a7 = (W7*b[8*1]-W1*b[8*7] + 4)>>3;
a5 = (W5*b[8*5]+W3*b[8*3] + 4)>>3;
a3 = (W3*b[8*5]-W5*b[8*3] + 4)>>3;
a2 = (W2*b[8*2]+W6*b[8*6] + 4)>>3;
a6 = (W6*b[8*2]-W2*b[8*6] + 4)>>3;
a0 = (W0*b[8*0]+W0*b[8*4] )>>3;
a4 = (W0*b[8*0]-W0*b[8*4] )>>3;
/*step 2*/
s1 = (181*(a1-a5+a7-a3)+128)>>8;
s2 = (181*(a1-a5-a7+a3)+128)>>8;
/*step 3*/
b[8*0] = (a0+a2+a1+a5 + (1<<13))>>14;
b[8*1] = (a4+a6 +s1 + (1<<13))>>14;
b[8*2] = (a4-a6 +s2 + (1<<13))>>14;
b[8*3] = (a0-a2+a7+a3 + (1<<13))>>14;
b[8*4] = (a0-a2-a7-a3 + (1<<13))>>14;
b[8*5] = (a4-a6 -s2 + (1<<13))>>14;
b[8*6] = (a4+a6 -s1 + (1<<13))>>14;
b[8*7] = (a0+a2-a1-a5 + (1<<13))>>14;
}
void ff_wmv2_idct_c(short * block){
int i;
for(i=0;i<64;i+=8){
wmv2_idct_row(block+i);
}
for(i=0;i<8;i++){
wmv2_idct_col(block+i);
}
}
/* XXX: those functions should be suppressed ASAP when all IDCTs are
converted */
static void ff_wmv2_idct_put_c(uint8_t *dest, int line_size, DCTELEM *block)
{
ff_wmv2_idct_c(block);
put_pixels_clamped_c(block, dest, line_size);
}
static void ff_wmv2_idct_add_c(uint8_t *dest, int line_size, DCTELEM *block)
{
ff_wmv2_idct_c(block);
add_pixels_clamped_c(block, dest, line_size);
}
static void ff_jref_idct_put(uint8_t *dest, int line_size, DCTELEM *block)
{
ff_j_rev_dct (block);
......@@ -2650,11 +2566,6 @@ av_cold void ff_dsputil_init(DSPContext* c, AVCodecContext *avctx)
c->idct_add= ff_jref_idct_add;
c->idct = ff_j_rev_dct;
c->idct_permutation_type= FF_LIBMPEG2_IDCT_PERM;
}else if(avctx->idct_algo==FF_IDCT_WMV2){
c->idct_put= ff_wmv2_idct_put_c;
c->idct_add= ff_wmv2_idct_add_c;
c->idct = ff_wmv2_idct_c;
c->idct_permutation_type= FF_NO_IDCT_PERM;
}else if(avctx->idct_algo==FF_IDCT_FAAN){
c->idct_put= ff_faanidct_put;
c->idct_add= ff_faanidct_add;
......
......@@ -46,7 +46,6 @@ void ff_fdct248_islow_8(DCTELEM *data);
void ff_fdct248_islow_10(DCTELEM *data);
void ff_j_rev_dct (DCTELEM *data);
void ff_wmv2_idct_c(DCTELEM *data);
void ff_fdct_mmx(DCTELEM *block);
void ff_fdct_mmxext(DCTELEM *block);
......
......@@ -28,8 +28,24 @@
av_cold void ff_wmv2_common_init(Wmv2Context * w){
MpegEncContext * const s= &w->s;
ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[0], ff_wmv2_scantableA);
ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[1], ff_wmv2_scantableB);
ff_wmv2dsp_init(&w->wdsp);
ff_init_scantable_permutation(s->dsp.idct_permutation,
w->wdsp.idct_perm);
ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[0],
ff_wmv2_scantableA);
ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[1],
ff_wmv2_scantableB);
ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable,
ff_wmv1_scantable[1]);
ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable,
ff_wmv1_scantable[2]);
ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable,
ff_wmv1_scantable[3]);
ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable,
ff_wmv1_scantable[0]);
s->dsp.idct_put = w->wdsp.idct_put;
s->dsp.idct_add = w->wdsp.idct_add;
s->dsp.idct = NULL;
}
static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int stride, int n){
......@@ -38,7 +54,7 @@ static void wmv2_add_block(Wmv2Context *w, DCTELEM *block1, uint8_t *dst, int st
if (s->block_last_index[n] >= 0) {
switch(w->abt_type_table[n]){
case 0:
s->dsp.idct_add (dst, stride, block1);
w->wdsp.idct_add(dst, stride, block1);
break;
case 1:
ff_simple_idct84_add(dst , stride, block1);
......
......@@ -25,6 +25,7 @@
#include "dsputil.h"
#include "mpegvideo.h"
#include "intrax8.h"
#include "wmv2dsp.h"
#define SKIP_TYPE_NONE 0
#define SKIP_TYPE_MPEG 1
......@@ -35,6 +36,7 @@
typedef struct Wmv2Context{
MpegEncContext s;
IntraX8Context x8;
WMV2DSPContext wdsp;
int j_type_bit;
int j_type;
int abt_flag;
......
......@@ -447,10 +447,6 @@ int ff_wmv2_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
static av_cold int wmv2_decode_init(AVCodecContext *avctx){
Wmv2Context * const w= avctx->priv_data;
if(avctx->idct_algo==FF_IDCT_AUTO){
avctx->idct_algo=FF_IDCT_WMV2;
}
if(ff_msmpeg4_decode_init(avctx) < 0)
return -1;
......
/*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/attributes.h"
#include "libavutil/common.h"
#include "avcodec.h"
#include "wmv2dsp.h"
#define W0 2048
#define W1 2841 /* 2048*sqrt (2)*cos (1*pi/16) */
#define W2 2676 /* 2048*sqrt (2)*cos (2*pi/16) */
#define W3 2408 /* 2048*sqrt (2)*cos (3*pi/16) */
#define W4 2048 /* 2048*sqrt (2)*cos (4*pi/16) */
#define W5 1609 /* 2048*sqrt (2)*cos (5*pi/16) */
#define W6 1108 /* 2048*sqrt (2)*cos (6*pi/16) */
#define W7 565 /* 2048*sqrt (2)*cos (7*pi/16) */
static void wmv2_idct_row(short * b)
{
int s1, s2;
int a0, a1, a2, a3, a4, a5, a6, a7;
/* step 1 */
a1 = W1 * b[1] + W7 * b[7];
a7 = W7 * b[1] - W1 * b[7];
a5 = W5 * b[5] + W3 * b[3];
a3 = W3 * b[5] - W5 * b[3];
a2 = W2 * b[2] + W6 * b[6];
a6 = W6 * b[2] - W2 * b[6];
a0 = W0 * b[0] + W0 * b[4];
a4 = W0 * b[0] - W0 * b[4];
/* step 2 */
s1 = (181 * (a1 - a5 + a7 - a3) + 128) >> 8; // 1, 3, 5, 7
s2 = (181 * (a1 - a5 - a7 + a3) + 128) >> 8;
/* step 3 */
b[0] = (a0 + a2 + a1 + a5 + (1 << 7)) >> 8;
b[1] = (a4 + a6 + s1 + (1 << 7)) >> 8;
b[2] = (a4 - a6 + s2 + (1 << 7)) >> 8;
b[3] = (a0 - a2 + a7 + a3 + (1 << 7)) >> 8;
b[4] = (a0 - a2 - a7 - a3 + (1 << 7)) >> 8;
b[5] = (a4 - a6 - s2 + (1 << 7)) >> 8;
b[6] = (a4 + a6 - s1 + (1 << 7)) >> 8;
b[7] = (a0 + a2 - a1 - a5 + (1 << 7)) >> 8;
}
static void wmv2_idct_col(short * b)
{
int s1, s2;
int a0, a1, a2, a3, a4, a5, a6, a7;
/* step 1, with extended precision */
a1 = (W1 * b[8 * 1] + W7 * b[8 * 7] + 4) >> 3;
a7 = (W7 * b[8 * 1] - W1 * b[8 * 7] + 4) >> 3;
a5 = (W5 * b[8 * 5] + W3 * b[8 * 3] + 4) >> 3;
a3 = (W3 * b[8 * 5] - W5 * b[8 * 3] + 4) >> 3;
a2 = (W2 * b[8 * 2] + W6 * b[8 * 6] + 4) >> 3;
a6 = (W6 * b[8 * 2] - W2 * b[8 * 6] + 4) >> 3;
a0 = (W0 * b[8 * 0] + W0 * b[8 * 4] ) >> 3;
a4 = (W0 * b[8 * 0] - W0 * b[8 * 4] ) >> 3;
/* step 2 */
s1 = (181 * (a1 - a5 + a7 - a3) + 128) >> 8;
s2 = (181 * (a1 - a5 - a7 + a3) + 128) >> 8;
/* step 3 */
b[8 * 0] = (a0 + a2 + a1 + a5 + (1 << 13)) >> 14;
b[8 * 1] = (a4 + a6 + s1 + (1 << 13)) >> 14;
b[8 * 2] = (a4 - a6 + s2 + (1 << 13)) >> 14;
b[8 * 3] = (a0 - a2 + a7 + a3 + (1 << 13)) >> 14;
b[8 * 4] = (a0 - a2 - a7 - a3 + (1 << 13)) >> 14;
b[8 * 5] = (a4 - a6 - s2 + (1 << 13)) >> 14;
b[8 * 6] = (a4 + a6 - s1 + (1 << 13)) >> 14;
b[8 * 7] = (a0 + a2 - a1 - a5 + (1 << 13)) >> 14;
}
static void wmv2_idct_add_c(uint8_t *dest, int line_size, DCTELEM *block)
{
int i;
for (i = 0; i < 64; i += 8)
wmv2_idct_row(block + i);
for (i = 0; i < 8; i++)
wmv2_idct_col(block + i);
for (i = 0; i < 8; i++) {
dest[0] = av_clip_uint8(dest[0] + block[0]);
dest[1] = av_clip_uint8(dest[1] + block[1]);
dest[2] = av_clip_uint8(dest[2] + block[2]);
dest[3] = av_clip_uint8(dest[3] + block[3]);
dest[4] = av_clip_uint8(dest[4] + block[4]);
dest[5] = av_clip_uint8(dest[5] + block[5]);
dest[6] = av_clip_uint8(dest[6] + block[6]);
dest[7] = av_clip_uint8(dest[7] + block[7]);
dest += line_size;
block += 8;
}
}
static void wmv2_idct_put_c(uint8_t *dest, int line_size, DCTELEM *block)
{
int i;
for (i = 0; i < 64; i += 8)
wmv2_idct_row(block + i);
for (i = 0; i < 8; i++)
wmv2_idct_col(block + i);
for (i = 0; i < 8; i++) {
dest[0] = av_clip_uint8(block[0]);
dest[1] = av_clip_uint8(block[1]);
dest[2] = av_clip_uint8(block[2]);
dest[3] = av_clip_uint8(block[3]);
dest[4] = av_clip_uint8(block[4]);
dest[5] = av_clip_uint8(block[5]);
dest[6] = av_clip_uint8(block[6]);
dest[7] = av_clip_uint8(block[7]);
dest += line_size;
block += 8;
}
}
av_cold void ff_wmv2dsp_init(WMV2DSPContext *c)
{
c->idct_add = wmv2_idct_add_c;
c->idct_put = wmv2_idct_put_c;
c->idct_perm = FF_NO_IDCT_PERM;
}
/*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_WMV2DSP_H
#define AVCODEC_WMV2DSP_H
#include <stdint.h>
#include "dsputil.h"
typedef struct WMV2DSPContext {
void (*idct_add)(uint8_t *dest, int line_size, DCTELEM *block);
void (*idct_put)(uint8_t *dest, int line_size, DCTELEM *block);
int idct_perm;
} WMV2DSPContext;
void ff_wmv2dsp_init(WMV2DSPContext *c);
#endif /* AVCODEC_WMV2DSP_H */
......@@ -2,45 +2,45 @@ ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 5652 size: 8917
ret: 0 st:-1 flags:0 ts:-1.000000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 5652 size: 8917
ret: 0 st:-1 flags:1 ts: 1.894167
ret: 0 st: 0 flags:1 dts: 1.440000 pts: 1.440000 pos: 83790 size: 11170
ret: 0 st: 0 flags:1 dts: 1.440000 pts: 1.440000 pos: 83764 size: 11170
ret: 0 st: 0 flags:0 ts: 0.800000
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 54572 size: 9989
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 54534 size: 9989
ret:-1 st: 0 flags:1 ts:-0.320000
ret:-1 st:-1 flags:0 ts: 2.576668
ret: 0 st:-1 flags:1 ts: 1.470835
ret: 0 st: 0 flags:1 dts: 1.440000 pts: 1.440000 pos: 83790 size: 11170
ret: 0 st: 0 flags:1 dts: 1.440000 pts: 1.440000 pos: 83764 size: 11170
ret: 0 st: 0 flags:0 ts: 0.360000
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 29632 size: 8839
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 29588 size: 8839
ret:-1 st: 0 flags:1 ts:-0.760000
ret:-1 st:-1 flags:0 ts: 2.153336
ret: 0 st:-1 flags:1 ts: 1.047503
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 54572 size: 9989
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 54534 size: 9989
ret: 0 st: 0 flags:0 ts:-0.040000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 5652 size: 8917
ret: 0 st: 0 flags:1 ts: 2.840000
ret: 0 st: 0 flags:1 dts: 1.920000 pts: 1.920000 pos: 116058 size: 11554
ret: 0 st: 0 flags:1 dts: 1.920000 pts: 1.920000 pos: 116062 size: 11554
ret: 0 st:-1 flags:0 ts: 1.730004
ret: 0 st: 0 flags:1 dts: 1.920000 pts: 1.920000 pos: 116058 size: 11554
ret: 0 st: 0 flags:1 dts: 1.920000 pts: 1.920000 pos: 116062 size: 11554
ret: 0 st:-1 flags:1 ts: 0.624171
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 29632 size: 8839
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 29588 size: 8839
ret: 0 st: 0 flags:0 ts:-0.480000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 5652 size: 8917
ret: 0 st: 0 flags:1 ts: 2.400000
ret: 0 st: 0 flags:1 dts: 1.920000 pts: 1.920000 pos: 116058 size: 11554
ret: 0 st: 0 flags:1 dts: 1.920000 pts: 1.920000 pos: 116062 size: 11554
ret: 0 st:-1 flags:0 ts: 1.306672
ret: 0 st: 0 flags:1 dts: 1.440000 pts: 1.440000 pos: 83790 size: 11170
ret: 0 st: 0 flags:1 dts: 1.440000 pts: 1.440000 pos: 83764 size: 11170
ret: 0 st:-1 flags:1 ts: 0.200839
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 5652 size: 8917
ret: 0 st: 0 flags:0 ts:-0.920000
ret: 0 st: 0 flags:1 dts: 0.000000 pts: 0.000000 pos: 5652 size: 8917
ret: 0 st: 0 flags:1 ts: 2.000000
ret: 0 st: 0 flags:1 dts: 1.920000 pts: 1.920000 pos: 116058 size: 11554
ret: 0 st: 0 flags:1 dts: 1.920000 pts: 1.920000 pos: 116062 size: 11554
ret: 0 st:-1 flags:0 ts: 0.883340
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 54572 size: 9989
ret: 0 st: 0 flags:1 dts: 0.960000 pts: 0.960000 pos: 54534 size: 9989
ret:-1 st:-1 flags:1 ts:-0.222493
ret:-1 st: 0 flags:0 ts: 2.680000
ret: 0 st: 0 flags:1 ts: 1.560000
ret: 0 st: 0 flags:1 dts: 1.440000 pts: 1.440000 pos: 83790 size: 11170
ret: 0 st: 0 flags:1 dts: 1.440000 pts: 1.440000 pos: 83764 size: 11170
ret: 0 st:-1 flags:0 ts: 0.460008
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 29632 size: 8839
ret: 0 st: 0 flags:1 dts: 0.480000 pts: 0.480000 pos: 29588 size: 8839
ret:-1 st:-1 flags:1 ts:-0.645825
fc0796c6c49a18034cef008d61c0d964 *tests/data/fate/vsynth1-wmv2.avi
659840 tests/data/fate/vsynth1-wmv2.avi
5182edba5b5e0354b39ce4f3604b62da *tests/data/fate/vsynth1-wmv2.out.rawvideo
stddev: 7.97 PSNR: 30.09 MAXDIFF: 110 bytes: 7603200/ 7603200
3c8a93fa645574f5b11eb51cf0efd227 *tests/data/fate/vsynth1-wmv2.avi
659162 tests/data/fate/vsynth1-wmv2.avi
2d61f24836d54766e8d370f243d83dcd *tests/data/fate/vsynth1-wmv2.out.rawvideo
stddev: 7.97 PSNR: 30.09 MAXDIFF: 105 bytes: 7603200/ 7603200
0760abea07c386ab956fa1bb8b14c599 *tests/data/fate/vsynth2-wmv2.avi
c7db61ce6fc07e8fb9a7204992c2e4c4 *tests/data/fate/vsynth2-wmv2.avi
129848 tests/data/fate/vsynth2-wmv2.avi
81eee429b665254d19a06607463c0b5e *tests/data/fate/vsynth2-wmv2.out.rawvideo
stddev: 5.33 PSNR: 33.60 MAXDIFF: 77 bytes: 7603200/ 7603200
288bdf1b411b814a067ceb00ac6b9d16 *tests/data/fate/vsynth2-wmv2.out.rawvideo
stddev: 5.33 PSNR: 33.59 MAXDIFF: 77 bytes: 7603200/ 7603200
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