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Merge commit '7a1d6ddd2c6b2d66fbc1afa584cf506930a26453' 

* commit '7a1d6ddd2c6b2d66fbc1afa584cf506930a26453':
  xvid: Add C IDCT

Conflicts:
	libavcodec/dct-test.c
	libavcodec/xvididct.c

See: 298b3b6c1f
Merged-by: Michael Niedermayer <michaelni@gmx.at>
tags/n2.4
Michael Niedermayer 11 years ago
parent
5db23c07a3 7a1d6ddd2c
commit
5b58d79a99
8 changed files with 324 additions and 346 deletions
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  1. +1
    -1
      libavcodec/Makefile
  2. +4
    -0
      libavcodec/dct-test.c
  3. +7
    -1
      libavcodec/x86/xvididct_init.c
  4. +0
    -330
      libavcodec/xvid_c_idct.c
  5. +304
    -8
      libavcodec/xvididct.c
  6. +6
    -3
      libavcodec/xvididct.h
  7. +2
    -3
      tests/fate/xvid.mak
  8. +0
    -0
      tests/ref/fate/xvid-idct

+ 1
- 1
libavcodec/Makefile View File

@@ -325,7 +325,7 @@ OBJS-$(CONFIG_MPEG1VIDEO_DECODER) += mpeg12dec.o mpeg12.o mpeg12data.o
OBJS-$(CONFIG_MPEG1VIDEO_ENCODER) += mpeg12enc.o mpeg12.o
OBJS-$(CONFIG_MPEG2VIDEO_DECODER) += mpeg12dec.o mpeg12.o mpeg12data.o
OBJS-$(CONFIG_MPEG2VIDEO_ENCODER) += mpeg12enc.o mpeg12.o
OBJS-$(CONFIG_MPEG4_DECODER) += xvididct.o xvid_c_idct.o
OBJS-$(CONFIG_MPEG4_DECODER) += xvididct.o
OBJS-$(CONFIG_MPL2_DECODER) += mpl2dec.o ass.o
OBJS-$(CONFIG_MSMPEG4V1_DECODER) += msmpeg4dec.o msmpeg4.o msmpeg4data.o
OBJS-$(CONFIG_MSMPEG4V2_DECODER) += msmpeg4dec.o msmpeg4.o msmpeg4data.o


+ 4
- 0
libavcodec/dct-test.c View File

@@ -42,6 +42,7 @@
#include "dct.h"
#include "idctdsp.h"
#include "simple_idct.h"
#include "xvididct.h"
#include "aandcttab.h"
#include "faandct.h"
#include "faanidct.h"
@@ -81,6 +82,9 @@ static const struct algo idct_tab[] = {
{ "INT", ff_j_rev_dct, FF_IDCT_PERM_LIBMPEG2 },
{ "SIMPLE-C", ff_simple_idct_8, FF_IDCT_PERM_NONE },
{ "PR-C", ff_prores_idct_wrap, FF_IDCT_PERM_NONE, 0, 1 },
#if CONFIG_MPEG4_DECODER
{ "XVID", ff_xvid_idct, FF_IDCT_PERM_NONE, 0, 1 },
#endif /* CONFIG_MPEG4_DECODER */
};

#if ARCH_ARM


+ 7
- 1
libavcodec/x86/xvididct_init.c View File

@@ -26,10 +26,16 @@
#include "idctdsp.h"
#include "xvididct.h"

av_cold void ff_xvid_idct_init_x86(IDCTDSPContext *c)
av_cold void ff_xvid_idct_init_x86(IDCTDSPContext *c, AVCodecContext *avctx,
unsigned high_bit_depth)
{
int cpu_flags = av_get_cpu_flags();

if (high_bit_depth ||
!(avctx->idct_algo == FF_IDCT_AUTO ||
avctx->idct_algo == FF_IDCT_XVID))
return;

if (INLINE_MMX(cpu_flags)) {
c->idct_put = ff_xvid_idct_mmx_put;
c->idct_add = ff_xvid_idct_mmx_add;


+ 0
- 330
libavcodec/xvid_c_idct.c View File

@@ -1,330 +0,0 @@
/*****************************************************************************
*
* XVID MPEG-4 VIDEO CODEC
* - Inverse DCT -
*
* Copyright (C) 2006-2011 Xvid Solutions GmbH
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*
****************************************************************************/

/**
* @file
* Walken IDCT
* Alternative idct implementations for decoding compatibility
*
* @author Skal
* @note this "C" version is not the original one, but is modified to
* yield the same error profile as the MMX version.
*/


#include "xvididct.h"


#define ROW_SHIFT 11
#define COL_SHIFT 6

// #define FIX(x) (int)((x) * (1<<ROW_SHIFT))
#define Rnd0 65536 // 1<<(COL_SHIFT+ROW_SHIFT-1);
#define Rnd1 3597 // FIX (1.75683487303);
#define Rnd2 2260 // FIX (1.10355339059);
#define Rnd3 1203 // FIX (0.587788325588);
#define Rnd4 0
#define Rnd5 120 // FIX (0.058658283817);
#define Rnd6 512 // FIX (0.25);
#define Rnd7 512 // FIX (0.25);

static const int Tab04[] = { 22725, 21407, 19266, 16384, 12873, 8867, 4520 };
static const int Tab17[] = { 31521, 29692, 26722, 22725, 17855, 12299, 6270 };
static const int Tab26[] = { 29692, 27969, 25172, 21407, 16819, 11585, 5906 };
static const int Tab35[] = { 26722, 25172, 22654, 19266, 15137, 10426, 5315 };

static int Idct_Row(short * In, const int * const Tab, int Rnd)
{
const int C1 = Tab[0];
const int C2 = Tab[1];
const int C3 = Tab[2];
const int C4 = Tab[3];
const int C5 = Tab[4];
const int C6 = Tab[5];
const int C7 = Tab[6];

const int Right = In[5]|In[6]|In[7];
const int Left = In[1]|In[2]|In[3];
if (!(Right | In[4]))
{
const int K = C4*In[0] + Rnd;
if (Left)
{
const int a0 = K + C2*In[2];
const int a1 = K + C6*In[2];
const int a2 = K - C6*In[2];
const int a3 = K - C2*In[2];

const int b0 = C1*In[1] + C3*In[3];
const int b1 = C3*In[1] - C7*In[3];
const int b2 = C5*In[1] - C1*In[3];
const int b3 = C7*In[1] - C5*In[3];

In[0] = (a0 + b0) >> ROW_SHIFT;
In[1] = (a1 + b1) >> ROW_SHIFT;
In[2] = (a2 + b2) >> ROW_SHIFT;
In[3] = (a3 + b3) >> ROW_SHIFT;
In[4] = (a3 - b3) >> ROW_SHIFT;
In[5] = (a2 - b2) >> ROW_SHIFT;
In[6] = (a1 - b1) >> ROW_SHIFT;
In[7] = (a0 - b0) >> ROW_SHIFT;
}
else
{
const int a0 = K >> ROW_SHIFT;
if (a0) {
In[0] = In[1] = In[2] = In[3] =
In[4] = In[5] = In[6] = In[7] = a0;
}
else return 0;
}
}
else if (!(Left|Right))
{
const int a0 = (Rnd + C4*(In[0]+In[4])) >> ROW_SHIFT;
const int a1 = (Rnd + C4*(In[0]-In[4])) >> ROW_SHIFT;

In[0] = a0;
In[3] = a0;
In[4] = a0;
In[7] = a0;
In[1] = a1;
In[2] = a1;
In[5] = a1;
In[6] = a1;
}
else
{
const int K = C4*In[0] + Rnd;
const int a0 = K + C2*In[2] + C4*In[4] + C6*In[6];
const int a1 = K + C6*In[2] - C4*In[4] - C2*In[6];
const int a2 = K - C6*In[2] - C4*In[4] + C2*In[6];
const int a3 = K - C2*In[2] + C4*In[4] - C6*In[6];

const int b0 = C1*In[1] + C3*In[3] + C5*In[5] + C7*In[7];
const int b1 = C3*In[1] - C7*In[3] - C1*In[5] - C5*In[7];
const int b2 = C5*In[1] - C1*In[3] + C7*In[5] + C3*In[7];
const int b3 = C7*In[1] - C5*In[3] + C3*In[5] - C1*In[7];

In[0] = (a0 + b0) >> ROW_SHIFT;
In[1] = (a1 + b1) >> ROW_SHIFT;
In[2] = (a2 + b2) >> ROW_SHIFT;
In[3] = (a3 + b3) >> ROW_SHIFT;
In[4] = (a3 - b3) >> ROW_SHIFT;
In[5] = (a2 - b2) >> ROW_SHIFT;
In[6] = (a1 - b1) >> ROW_SHIFT;
In[7] = (a0 - b0) >> ROW_SHIFT;
}
return 1;
}

#define Tan1 0x32ec
#define Tan2 0x6a0a
#define Tan3 0xab0e
#define Sqrt2 0x5a82

#define MULT(c,x, n) ( ((c) * (x)) >> (n) )
// 12b version => #define MULT(c,x, n) ( (((c)>>3) * (x)) >> ((n)-3) )
// 12b zero-testing version:

#define BUTF(a, b, tmp) \
(tmp) = (a)+(b); \
(b) = (a)-(b); \
(a) = (tmp)

#define LOAD_BUTF(m1, m2, a, b, tmp, S) \
(m1) = (S)[(a)] + (S)[(b)]; \
(m2) = (S)[(a)] - (S)[(b)]

static void Idct_Col_8(short * const In)
{
int mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7, Spill;

// odd

mm4 = (int)In[7*8];
mm5 = (int)In[5*8];
mm6 = (int)In[3*8];
mm7 = (int)In[1*8];

mm0 = MULT(Tan1, mm4, 16) + mm7;
mm1 = MULT(Tan1, mm7, 16) - mm4;
mm2 = MULT(Tan3, mm5, 16) + mm6;
mm3 = MULT(Tan3, mm6, 16) - mm5;

mm7 = mm0 + mm2;
mm4 = mm1 - mm3;
mm0 = mm0 - mm2;
mm1 = mm1 + mm3;
mm6 = mm0 + mm1;
mm5 = mm0 - mm1;
mm5 = 2*MULT(Sqrt2, mm5, 16); // 2*sqrt2
mm6 = 2*MULT(Sqrt2, mm6, 16); // Watch out: precision loss but done to match
// the pmulhw used in mmx/sse versions

// even

mm1 = (int)In[2*8];
mm2 = (int)In[6*8];
mm3 = MULT(Tan2,mm2, 16) + mm1;
mm2 = MULT(Tan2,mm1, 16) - mm2;

LOAD_BUTF(mm0, mm1, 0*8, 4*8, Spill, In);

BUTF(mm0, mm3, Spill);
BUTF(mm0, mm7, Spill);
In[8*0] = (int16_t) (mm0 >> COL_SHIFT);
In[8*7] = (int16_t) (mm7 >> COL_SHIFT);
BUTF(mm3, mm4, mm0);
In[8*3] = (int16_t) (mm3 >> COL_SHIFT);
In[8*4] = (int16_t) (mm4 >> COL_SHIFT);

BUTF(mm1, mm2, mm0);
BUTF(mm1, mm6, mm0);
In[8*1] = (int16_t) (mm1 >> COL_SHIFT);
In[8*6] = (int16_t) (mm6 >> COL_SHIFT);
BUTF(mm2, mm5, mm0);
In[8*2] = (int16_t) (mm2 >> COL_SHIFT);
In[8*5] = (int16_t) (mm5 >> COL_SHIFT);
}

static void Idct_Col_4(short * const In)
{
int mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7, Spill;

// odd

mm0 = (int)In[1*8];
mm2 = (int)In[3*8];

mm1 = MULT(Tan1, mm0, 16);
mm3 = MULT(Tan3, mm2, 16);

mm7 = mm0 + mm2;
mm4 = mm1 - mm3;
mm0 = mm0 - mm2;
mm1 = mm1 + mm3;
mm6 = mm0 + mm1;
mm5 = mm0 - mm1;
mm6 = 2*MULT(Sqrt2, mm6, 16); // 2*sqrt2
mm5 = 2*MULT(Sqrt2, mm5, 16);

// even

mm0 = mm1 = (int)In[0*8];
mm3 = (int)In[2*8];
mm2 = MULT(Tan2,mm3, 16);

BUTF(mm0, mm3, Spill);
BUTF(mm0, mm7, Spill);
In[8*0] = (int16_t) (mm0 >> COL_SHIFT);
In[8*7] = (int16_t) (mm7 >> COL_SHIFT);
BUTF(mm3, mm4, mm0);
In[8*3] = (int16_t) (mm3 >> COL_SHIFT);
In[8*4] = (int16_t) (mm4 >> COL_SHIFT);

BUTF(mm1, mm2, mm0);
BUTF(mm1, mm6, mm0);
In[8*1] = (int16_t) (mm1 >> COL_SHIFT);
In[8*6] = (int16_t) (mm6 >> COL_SHIFT);
BUTF(mm2, mm5, mm0);
In[8*2] = (int16_t) (mm2 >> COL_SHIFT);
In[8*5] = (int16_t) (mm5 >> COL_SHIFT);
}

static void Idct_Col_3(short * const In)
{
int mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7, Spill;

// odd

mm7 = (int)In[1*8];
mm4 = MULT(Tan1, mm7, 16);

mm6 = mm7 + mm4;
mm5 = mm7 - mm4;
mm6 = 2*MULT(Sqrt2, mm6, 16); // 2*sqrt2
mm5 = 2*MULT(Sqrt2, mm5, 16);

// even

mm0 = mm1 = (int)In[0*8];
mm3 = (int)In[2*8];
mm2 = MULT(Tan2,mm3, 16);

BUTF(mm0, mm3, Spill);
BUTF(mm0, mm7, Spill);
In[8*0] = (int16_t) (mm0 >> COL_SHIFT);
In[8*7] = (int16_t) (mm7 >> COL_SHIFT);
BUTF(mm3, mm4, mm0);
In[8*3] = (int16_t) (mm3 >> COL_SHIFT);
In[8*4] = (int16_t) (mm4 >> COL_SHIFT);

BUTF(mm1, mm2, mm0);
BUTF(mm1, mm6, mm0);
In[8*1] = (int16_t) (mm1 >> COL_SHIFT);
In[8*6] = (int16_t) (mm6 >> COL_SHIFT);
BUTF(mm2, mm5, mm0);
In[8*2] = (int16_t) (mm2 >> COL_SHIFT);
In[8*5] = (int16_t) (mm5 >> COL_SHIFT);
}

#undef Tan1
#undef Tan2
#undef Tan3
#undef Sqrt2

#undef ROW_SHIFT
#undef COL_SHIFT

//////////////////////////////////////////////////////////

void ff_idct_xvid(int16_t *const In)
{
int i, Rows = 0x07;

Idct_Row(In + 0*8, Tab04, Rnd0);
Idct_Row(In + 1*8, Tab17, Rnd1);
Idct_Row(In + 2*8, Tab26, Rnd2);
if (Idct_Row(In + 3*8, Tab35, Rnd3)) Rows |= 0x08;
if (Idct_Row(In + 4*8, Tab04, Rnd4)) Rows |= 0x10;
if (Idct_Row(In + 5*8, Tab35, Rnd5)) Rows |= 0x20;
if (Idct_Row(In + 6*8, Tab26, Rnd6)) Rows |= 0x40;
if (Idct_Row(In + 7*8, Tab17, Rnd7)) Rows |= 0x80;

if (Rows&0xf0) {
for(i=0; i<8; i++)
Idct_Col_8(In + i);
}
else if (Rows&0x08) {
for(i=0; i<8; i++)
Idct_Col_4(In + i);
}
else {
for(i=0; i<8; i++)
Idct_Col_3(In + i);
}
}

+ 304
- 8
libavcodec/xvididct.c View File

@@ -1,4 +1,8 @@
/*
* Xvid MPEG-4 IDCT
*
* Copyright (C) 2006-2011 Xvid Solutions GmbH
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
@@ -16,21 +20,313 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/

/**
* @file
* Walken IDCT
* Alternative IDCT implementation for decoding compatibility.
*
* @author Skal
* @note This C version is not the original IDCT, but a modified one that
* yields the same error profile as the MMX/MMXEXT/SSE2 versions.
*/

#include "config.h"
#include "libavutil/attributes.h"
#include "avcodec.h"
#include "idctdsp.h"
#include "xvididct.h"

static void idct_xvid_put(uint8_t *dest, int line_size, int16_t *block)
#define ROW_SHIFT 11
#define COL_SHIFT 6

// #define FIX(x) (int)((x) * (1 << ROW_SHIFT))
#define RND0 65536 // 1 << (COL_SHIFT + ROW_SHIFT - 1);
#define RND1 3597 // FIX (1.75683487303);
#define RND2 2260 // FIX (1.10355339059);
#define RND3 1203 // FIX (0.587788325588);
#define RND4 0
#define RND5 120 // FIX (0.058658283817);
#define RND6 512 // FIX (0.25);
#define RND7 512 // FIX (0.25);

static const int TAB04[] = { 22725, 21407, 19266, 16384, 12873, 8867, 4520 };
static const int TAB17[] = { 31521, 29692, 26722, 22725, 17855, 12299, 6270 };
static const int TAB26[] = { 29692, 27969, 25172, 21407, 16819, 11585, 5906 };
static const int TAB35[] = { 26722, 25172, 22654, 19266, 15137, 10426, 5315 };

static int idct_row(short *in, const int *const tab, int rnd)
{
const int c1 = tab[0];
const int c2 = tab[1];
const int c3 = tab[2];
const int c4 = tab[3];
const int c5 = tab[4];
const int c6 = tab[5];
const int c7 = tab[6];

const int right = in[5] | in[6] | in[7];
const int left = in[1] | in[2] | in[3];
if (!(right | in[4])) {
const int k = c4 * in[0] + rnd;
if (left) {
const int a0 = k + c2 * in[2];
const int a1 = k + c6 * in[2];
const int a2 = k - c6 * in[2];
const int a3 = k - c2 * in[2];

const int b0 = c1 * in[1] + c3 * in[3];
const int b1 = c3 * in[1] - c7 * in[3];
const int b2 = c5 * in[1] - c1 * in[3];
const int b3 = c7 * in[1] - c5 * in[3];

in[0] = (a0 + b0) >> ROW_SHIFT;
in[1] = (a1 + b1) >> ROW_SHIFT;
in[2] = (a2 + b2) >> ROW_SHIFT;
in[3] = (a3 + b3) >> ROW_SHIFT;
in[4] = (a3 - b3) >> ROW_SHIFT;
in[5] = (a2 - b2) >> ROW_SHIFT;
in[6] = (a1 - b1) >> ROW_SHIFT;
in[7] = (a0 - b0) >> ROW_SHIFT;
} else {
const int a0 = k >> ROW_SHIFT;
if (a0) {
in[0] =
in[1] =
in[2] =
in[3] =
in[4] =
in[5] =
in[6] =
in[7] = a0;
} else
return 0;
}
} else if (!(left | right)) {
const int a0 = (rnd + c4 * (in[0] + in[4])) >> ROW_SHIFT;
const int a1 = (rnd + c4 * (in[0] - in[4])) >> ROW_SHIFT;

in[0] = a0;
in[3] = a0;
in[4] = a0;
in[7] = a0;
in[1] = a1;
in[2] = a1;
in[5] = a1;
in[6] = a1;
} else {
const int k = c4 * in[0] + rnd;
const int a0 = k + c2 * in[2] + c4 * in[4] + c6 * in[6];
const int a1 = k + c6 * in[2] - c4 * in[4] - c2 * in[6];
const int a2 = k - c6 * in[2] - c4 * in[4] + c2 * in[6];
const int a3 = k - c2 * in[2] + c4 * in[4] - c6 * in[6];

const int b0 = c1 * in[1] + c3 * in[3] + c5 * in[5] + c7 * in[7];
const int b1 = c3 * in[1] - c7 * in[3] - c1 * in[5] - c5 * in[7];
const int b2 = c5 * in[1] - c1 * in[3] + c7 * in[5] + c3 * in[7];
const int b3 = c7 * in[1] - c5 * in[3] + c3 * in[5] - c1 * in[7];

in[0] = (a0 + b0) >> ROW_SHIFT;
in[1] = (a1 + b1) >> ROW_SHIFT;
in[2] = (a2 + b2) >> ROW_SHIFT;
in[3] = (a3 + b3) >> ROW_SHIFT;
in[4] = (a3 - b3) >> ROW_SHIFT;
in[5] = (a2 - b2) >> ROW_SHIFT;
in[6] = (a1 - b1) >> ROW_SHIFT;
in[7] = (a0 - b0) >> ROW_SHIFT;
}
return 1;
}

#define TAN1 0x32EC
#define TAN2 0x6A0A
#define TAN3 0xAB0E
#define SQRT2 0x5A82

#define MULT(c, x, n) (((c) * (x)) >> (n))
// 12b version => #define MULT(c,x, n) ((((c) >> 3) * (x)) >> ((n) - 3))
// 12b zero-testing version:

#define BUTTERFLY(a, b, tmp) \
(tmp) = (a) + (b); \
(b) = (a) - (b); \
(a) = (tmp)

#define LOAD_BUTTERFLY(m1, m2, a, b, tmp, s) \
(m1) = (s)[(a)] + (s)[(b)]; \
(m2) = (s)[(a)] - (s)[(b)]

static void idct_col_8(short *const in)
{
int mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7, spill;

// odd

mm4 = (int) in[7 * 8];
mm5 = (int) in[5 * 8];
mm6 = (int) in[3 * 8];
mm7 = (int) in[1 * 8];

mm0 = MULT(TAN1, mm4, 16) + mm7;
mm1 = MULT(TAN1, mm7, 16) - mm4;
mm2 = MULT(TAN3, mm5, 16) + mm6;
mm3 = MULT(TAN3, mm6, 16) - mm5;

mm7 = mm0 + mm2;
mm4 = mm1 - mm3;
mm0 = mm0 - mm2;
mm1 = mm1 + mm3;
mm6 = mm0 + mm1;
mm5 = mm0 - mm1;
mm5 = 2 * MULT(SQRT2, mm5, 16); // 2*sqrt2
mm6 = 2 * MULT(SQRT2, mm6, 16); // Watch out: precision loss but done to match
// the pmulhw used in MMX/MMXEXT/SSE2 versions

// even

mm1 = (int) in[2 * 8];
mm2 = (int) in[6 * 8];
mm3 = MULT(TAN2, mm2, 16) + mm1;
mm2 = MULT(TAN2, mm1, 16) - mm2;

LOAD_BUTTERFLY(mm0, mm1, 0 * 8, 4 * 8, spill, in);

BUTTERFLY(mm0, mm3, spill);
BUTTERFLY(mm0, mm7, spill);
in[8 * 0] = (int16_t) (mm0 >> COL_SHIFT);
in[8 * 7] = (int16_t) (mm7 >> COL_SHIFT);
BUTTERFLY(mm3, mm4, mm0);
in[8 * 3] = (int16_t) (mm3 >> COL_SHIFT);
in[8 * 4] = (int16_t) (mm4 >> COL_SHIFT);

BUTTERFLY(mm1, mm2, mm0);
BUTTERFLY(mm1, mm6, mm0);
in[8 * 1] = (int16_t) (mm1 >> COL_SHIFT);
in[8 * 6] = (int16_t) (mm6 >> COL_SHIFT);
BUTTERFLY(mm2, mm5, mm0);
in[8 * 2] = (int16_t) (mm2 >> COL_SHIFT);
in[8 * 5] = (int16_t) (mm5 >> COL_SHIFT);
}

static void idct_col_4(short *const in)
{
int mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7, spill;

// odd

mm0 = (int) in[1 * 8];
mm2 = (int) in[3 * 8];

mm1 = MULT(TAN1, mm0, 16);
mm3 = MULT(TAN3, mm2, 16);

mm7 = mm0 + mm2;
mm4 = mm1 - mm3;
mm0 = mm0 - mm2;
mm1 = mm1 + mm3;
mm6 = mm0 + mm1;
mm5 = mm0 - mm1;
mm6 = 2 * MULT(SQRT2, mm6, 16); // 2*sqrt2
mm5 = 2 * MULT(SQRT2, mm5, 16);

// even

mm0 = mm1 = (int) in[0 * 8];
mm3 = (int) in[2 * 8];
mm2 = MULT(TAN2, mm3, 16);

BUTTERFLY(mm0, mm3, spill);
BUTTERFLY(mm0, mm7, spill);
in[8 * 0] = (int16_t) (mm0 >> COL_SHIFT);
in[8 * 7] = (int16_t) (mm7 >> COL_SHIFT);
BUTTERFLY(mm3, mm4, mm0);
in[8 * 3] = (int16_t) (mm3 >> COL_SHIFT);
in[8 * 4] = (int16_t) (mm4 >> COL_SHIFT);

BUTTERFLY(mm1, mm2, mm0);
BUTTERFLY(mm1, mm6, mm0);
in[8 * 1] = (int16_t) (mm1 >> COL_SHIFT);
in[8 * 6] = (int16_t) (mm6 >> COL_SHIFT);
BUTTERFLY(mm2, mm5, mm0);
in[8 * 2] = (int16_t) (mm2 >> COL_SHIFT);
in[8 * 5] = (int16_t) (mm5 >> COL_SHIFT);
}

static void idct_col_3(short *const in)
{
int mm0, mm1, mm2, mm3, mm4, mm5, mm6, mm7, spill;

// odd

mm7 = (int) in[1 * 8];
mm4 = MULT(TAN1, mm7, 16);

mm6 = mm7 + mm4;
mm5 = mm7 - mm4;
mm6 = 2 * MULT(SQRT2, mm6, 16); // 2*sqrt2
mm5 = 2 * MULT(SQRT2, mm5, 16);

// even

mm0 = mm1 = (int) in[0 * 8];
mm3 = (int) in[2 * 8];
mm2 = MULT(TAN2, mm3, 16);

BUTTERFLY(mm0, mm3, spill);
BUTTERFLY(mm0, mm7, spill);
in[8 * 0] = (int16_t) (mm0 >> COL_SHIFT);
in[8 * 7] = (int16_t) (mm7 >> COL_SHIFT);
BUTTERFLY(mm3, mm4, mm0);
in[8 * 3] = (int16_t) (mm3 >> COL_SHIFT);
in[8 * 4] = (int16_t) (mm4 >> COL_SHIFT);

BUTTERFLY(mm1, mm2, mm0);
BUTTERFLY(mm1, mm6, mm0);
in[8 * 1] = (int16_t) (mm1 >> COL_SHIFT);
in[8 * 6] = (int16_t) (mm6 >> COL_SHIFT);
BUTTERFLY(mm2, mm5, mm0);
in[8 * 2] = (int16_t) (mm2 >> COL_SHIFT);
in[8 * 5] = (int16_t) (mm5 >> COL_SHIFT);
}

void ff_xvid_idct(int16_t *const in)
{
int i, rows = 0x07;

idct_row(in + 0 * 8, TAB04, RND0);
idct_row(in + 1 * 8, TAB17, RND1);
idct_row(in + 2 * 8, TAB26, RND2);
if (idct_row(in + 3 * 8, TAB35, RND3))
rows |= 0x08;
if (idct_row(in + 4 * 8, TAB04, RND4))
rows |= 0x10;
if (idct_row(in + 5 * 8, TAB35, RND5))
rows |= 0x20;
if (idct_row(in + 6 * 8, TAB26, RND6))
rows |= 0x40;
if (idct_row(in + 7 * 8, TAB17, RND7))
rows |= 0x80;

if (rows & 0xF0) {
for (i = 0; i < 8; i++)
idct_col_8(in + i);
} else if (rows & 0x08) {
for (i = 0; i < 8; i++)
idct_col_4(in + i);
} else {
for (i = 0; i < 8; i++)
idct_col_3(in + i);
}
}

static void xvid_idct_put(uint8_t *dest, int line_size, int16_t *block)
{
ff_idct_xvid(block);
ff_xvid_idct(block);
ff_put_pixels_clamped(block, dest, line_size);
}

static void idct_xvid_add(uint8_t *dest, int line_size, int16_t *block)
static void xvid_idct_add(uint8_t *dest, int line_size, int16_t *block)
{
ff_idct_xvid(block);
ff_xvid_idct(block);
ff_add_pixels_clamped(block, dest, line_size);
}

@@ -44,14 +340,14 @@ av_cold void ff_xvid_idct_init(IDCTDSPContext *c, AVCodecContext *avctx)
return;

if (avctx->idct_algo == FF_IDCT_XVID) {
c->idct_put = idct_xvid_put;
c->idct_add = idct_xvid_add;
c->idct = ff_idct_xvid;
c->idct_put = xvid_idct_put;
c->idct_add = xvid_idct_add;
c->idct = ff_xvid_idct;
c->perm_type = FF_IDCT_PERM_NONE;
}

if (ARCH_X86)
ff_xvid_idct_init_x86(c);
ff_xvid_idct_init_x86(c, avctx, high_bit_depth);

ff_init_scantable_permutation(c->idct_permutation, c->perm_type);
}

+ 6
- 3
libavcodec/xvididct.h View File

@@ -19,13 +19,16 @@
#ifndef AVCODEC_XVIDIDCT_H
#define AVCODEC_XVIDIDCT_H

#include <stdint.h>

#include "avcodec.h"
#include "idctdsp.h"

void ff_xvid_idct_init(IDCTDSPContext *c, AVCodecContext *avctx);
void ff_xvid_idct(int16_t *const in);

void ff_xvid_idct_init_x86(IDCTDSPContext *c);
void ff_xvid_idct_init(IDCTDSPContext *c, AVCodecContext *avctx);

void ff_idct_xvid(int16_t *const In);
void ff_xvid_idct_init_x86(IDCTDSPContext *c, AVCodecContext *avctx,
unsigned high_bit_depth);

#endif /* AVCODEC_XVIDIDCT_H */

+ 2
- 3
tests/fate/xvid.mak View File

@@ -1,8 +1,7 @@
fate-xvid-custom-matrix: CMD = framemd5 -flags +bitexact -idct simple -i $(TARGET_SAMPLES)/mpeg4/xvid_vlc_trac7411.h263
fate-xvid-idctmmx: CMD = framemd5 -flags +bitexact -cpuflags all -i $(TARGET_SAMPLES)/mpeg4/xvid_vlc_trac7411.h263
fate-xvid-idct: CMD = framemd5 -flags +bitexact -cpuflags all -i $(TARGET_SAMPLES)/mpeg4/xvid_vlc_trac7411.h263

FATE_XVID-$(call DEMDEC, M4V, MPEG4) += fate-xvid-custom-matrix
FATE_XVID-$(filter $(HAVE_MMX_INLINE), $(call DEMDEC, M4V, MPEG4)) += fate-xvid-idctmmx
FATE_XVID-$(call DEMDEC, M4V, MPEG4) += fate-xvid-custom-matrix fate-xvid-idct

FATE_SAMPLES_AVCONV += $(FATE_XVID-yes)



tests/ref/fate/xvid-idctmmx → tests/ref/fate/xvid-idct View File


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