| 37e8dcda |
/* |
| ff4ec49e |
* Simple IDCT
*
* Copyright (c) 2001 Michael Niedermayer <michaelni@gmx.at>
* |
| b78e7197 |
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or |
| ff4ec49e |
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either |
| b78e7197 |
* version 2.1 of the License, or (at your option) any later version. |
| ff4ec49e |
* |
| b78e7197 |
* FFmpeg is distributed in the hope that it will be useful, |
| ff4ec49e |
* 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 |
| b78e7197 |
* License along with FFmpeg; if not, write to the Free Software |
| 5509bffa |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| ff4ec49e |
*/ |
| 115329f1 |
|
| 983e3246 |
/** |
| bad5537e |
* @file libavcodec/simple_idct.c |
| 983e3246 |
* simpleidct in C.
*/ |
| 115329f1 |
|
| 37e8dcda |
/* |
| ff4ec49e |
based upon some outcommented c code from mpeg2dec (idct_mmx.c |
| 115329f1 |
written by Aaron Holtzman <aholtzma@ess.engr.uvic.ca>) |
| ff4ec49e |
*/ |
| 6000abfa |
#include "avcodec.h" |
| d36a2466 |
#include "dsputil.h" |
| edf7c2b2 |
#include "mathops.h" |
| 37e8dcda |
#include "simple_idct.h"
#if 0
#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) */
#define ROW_SHIFT 8
#define COL_SHIFT 17
#else
#define W1 22725 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
#define W2 21407 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
#define W3 19266 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 |
| ccf589a8 |
#define W4 16383 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5 |
| 37e8dcda |
#define W5 12873 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
#define W6 8867 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
#define W7 4520 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
#define ROW_SHIFT 11
#define COL_SHIFT 20 // 6
#endif |
| 4973971e |
|
| 0e15384d |
static inline void idctRowCondDC (DCTELEM * row) |
| 37e8dcda |
{ |
| bb270c08 |
int a0, a1, a2, a3, b0, b1, b2, b3; |
| b250f9c6 |
#if HAVE_FAST_64BIT |
| 412ba501 |
uint64_t temp;
#else
uint32_t temp;
#endif |
| 4973971e |
|
| b250f9c6 |
#if HAVE_FAST_64BIT |
| 412ba501 |
#ifdef WORDS_BIGENDIAN
#define ROW0_MASK 0xffff000000000000LL
#else
#define ROW0_MASK 0xffffLL
#endif |
| 0e15384d |
if(sizeof(DCTELEM)==2){ |
| 115329f1 |
if ( ((((uint64_t *)row)[0] & ~ROW0_MASK) | |
| 0e15384d |
((uint64_t *)row)[1]) == 0) {
temp = (row[0] << 3) & 0xffff;
temp += temp << 16;
temp += temp << 32;
((uint64_t *)row)[0] = temp;
((uint64_t *)row)[1] = temp;
return; |
| bb270c08 |
} |
| 0e15384d |
}else{
if (!(row[1]|row[2]|row[3]|row[4]|row[5]|row[6]|row[7])) {
row[0]=row[1]=row[2]=row[3]=row[4]=row[5]=row[6]=row[7]= row[0] << 3;
return;
}
} |
| 412ba501 |
#else |
| 0e15384d |
if(sizeof(DCTELEM)==2){
if (!(((uint32_t*)row)[1] |
((uint32_t*)row)[2] | |
| 115329f1 |
((uint32_t*)row)[3] | |
| 0e15384d |
row[1])) {
temp = (row[0] << 3) & 0xffff;
temp += temp << 16;
((uint32_t*)row)[0]=((uint32_t*)row)[1] =
((uint32_t*)row)[2]=((uint32_t*)row)[3] = temp;
return;
}
}else{
if (!(row[1]|row[2]|row[3]|row[4]|row[5]|row[6]|row[7])) {
row[0]=row[1]=row[2]=row[3]=row[4]=row[5]=row[6]=row[7]= row[0] << 3;
return;
}
} |
| 412ba501 |
#endif |
| 4973971e |
|
| 412ba501 |
a0 = (W4 * row[0]) + (1 << (ROW_SHIFT - 1)); |
| bb270c08 |
a1 = a0;
a2 = a0;
a3 = a0; |
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/* no need to optimize : gcc does it */
a0 += W2 * row[2];
a1 += W6 * row[2];
a2 -= W6 * row[2];
a3 -= W2 * row[2];
|
| edf7c2b2 |
b0 = MUL16(W1, row[1]); |
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MAC16(b0, W3, row[3]); |
| edf7c2b2 |
b1 = MUL16(W3, row[1]); |
| 412ba501 |
MAC16(b1, -W7, row[3]); |
| edf7c2b2 |
b2 = MUL16(W5, row[1]); |
| 412ba501 |
MAC16(b2, -W1, row[3]); |
| edf7c2b2 |
b3 = MUL16(W7, row[1]); |
| 412ba501 |
MAC16(b3, -W5, row[3]);
|
| b250f9c6 |
#if HAVE_FAST_64BIT |
| 412ba501 |
temp = ((uint64_t*)row)[1];
#else
temp = ((uint32_t*)row)[2] | ((uint32_t*)row)[3];
#endif |
| bb270c08 |
if (temp != 0) { |
| 412ba501 |
a0 += W4*row[4] + W6*row[6];
a1 += - W4*row[4] - W2*row[6];
a2 += - W4*row[4] + W2*row[6];
a3 += W4*row[4] - W6*row[6];
MAC16(b0, W5, row[5]);
MAC16(b0, W7, row[7]); |
| 115329f1 |
|
| 412ba501 |
MAC16(b1, -W1, row[5]);
MAC16(b1, -W5, row[7]); |
| 115329f1 |
|
| 412ba501 |
MAC16(b2, W7, row[5]);
MAC16(b2, W3, row[7]); |
| 115329f1 |
|
| 412ba501 |
MAC16(b3, W3, row[5]);
MAC16(b3, -W1, row[7]); |
| bb270c08 |
}
row[0] = (a0 + b0) >> ROW_SHIFT;
row[7] = (a0 - b0) >> ROW_SHIFT;
row[1] = (a1 + b1) >> ROW_SHIFT;
row[6] = (a1 - b1) >> ROW_SHIFT;
row[2] = (a2 + b2) >> ROW_SHIFT;
row[5] = (a2 - b2) >> ROW_SHIFT;
row[3] = (a3 + b3) >> ROW_SHIFT;
row[4] = (a3 - b3) >> ROW_SHIFT; |
| 4973971e |
}
|
| 115329f1 |
static inline void idctSparseColPut (uint8_t *dest, int line_size, |
| 0e15384d |
DCTELEM * col) |
| d36a2466 |
{ |
| bb270c08 |
int a0, a1, a2, a3, b0, b1, b2, b3; |
| 55fde95e |
uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; |
| d36a2466 |
/* XXX: I did that only to give same values as previous code */ |
| bb270c08 |
a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4));
a1 = a0;
a2 = a0;
a3 = a0; |
| d36a2466 |
a0 += + W2*col[8*2];
a1 += + W6*col[8*2];
a2 += - W6*col[8*2];
a3 += - W2*col[8*2];
|
| edf7c2b2 |
b0 = MUL16(W1, col[8*1]);
b1 = MUL16(W3, col[8*1]);
b2 = MUL16(W5, col[8*1]);
b3 = MUL16(W7, col[8*1]); |
| d36a2466 |
MAC16(b0, + W3, col[8*3]);
MAC16(b1, - W7, col[8*3]);
MAC16(b2, - W1, col[8*3]);
MAC16(b3, - W5, col[8*3]);
|
| bb270c08 |
if(col[8*4]){ |
| d36a2466 |
a0 += + W4*col[8*4];
a1 += - W4*col[8*4];
a2 += - W4*col[8*4];
a3 += + W4*col[8*4]; |
| bb270c08 |
} |
| d36a2466 |
|
| bb270c08 |
if (col[8*5]) { |
| d36a2466 |
MAC16(b0, + W5, col[8*5]);
MAC16(b1, - W1, col[8*5]);
MAC16(b2, + W7, col[8*5]);
MAC16(b3, + W3, col[8*5]); |
| bb270c08 |
} |
| d36a2466 |
|
| bb270c08 |
if(col[8*6]){ |
| d36a2466 |
a0 += + W6*col[8*6];
a1 += - W2*col[8*6];
a2 += + W2*col[8*6];
a3 += - W6*col[8*6]; |
| bb270c08 |
} |
| d36a2466 |
|
| bb270c08 |
if (col[8*7]) { |
| d36a2466 |
MAC16(b0, + W7, col[8*7]);
MAC16(b1, - W5, col[8*7]);
MAC16(b2, + W3, col[8*7]);
MAC16(b3, - W1, col[8*7]); |
| bb270c08 |
} |
| d36a2466 |
dest[0] = cm[(a0 + b0) >> COL_SHIFT];
dest += line_size;
dest[0] = cm[(a1 + b1) >> COL_SHIFT];
dest += line_size;
dest[0] = cm[(a2 + b2) >> COL_SHIFT];
dest += line_size;
dest[0] = cm[(a3 + b3) >> COL_SHIFT];
dest += line_size;
dest[0] = cm[(a3 - b3) >> COL_SHIFT];
dest += line_size;
dest[0] = cm[(a2 - b2) >> COL_SHIFT];
dest += line_size;
dest[0] = cm[(a1 - b1) >> COL_SHIFT];
dest += line_size;
dest[0] = cm[(a0 - b0) >> COL_SHIFT];
}
|
| 115329f1 |
static inline void idctSparseColAdd (uint8_t *dest, int line_size, |
| 0e15384d |
DCTELEM * col) |
| 37e8dcda |
{ |
| bb270c08 |
int a0, a1, a2, a3, b0, b1, b2, b3; |
| 55fde95e |
uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; |
| 37e8dcda |
|
| 412ba501 |
/* XXX: I did that only to give same values as previous code */ |
| bb270c08 |
a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4));
a1 = a0;
a2 = a0;
a3 = a0; |
| 37e8dcda |
|
| 412ba501 |
a0 += + W2*col[8*2];
a1 += + W6*col[8*2];
a2 += - W6*col[8*2];
a3 += - W2*col[8*2]; |
| 4973971e |
|
| edf7c2b2 |
b0 = MUL16(W1, col[8*1]);
b1 = MUL16(W3, col[8*1]);
b2 = MUL16(W5, col[8*1]);
b3 = MUL16(W7, col[8*1]); |
| 37e8dcda |
|
| 412ba501 |
MAC16(b0, + W3, col[8*3]);
MAC16(b1, - W7, col[8*3]);
MAC16(b2, - W1, col[8*3]);
MAC16(b3, - W5, col[8*3]); |
| 4973971e |
|
| bb270c08 |
if(col[8*4]){ |
| 412ba501 |
a0 += + W4*col[8*4];
a1 += - W4*col[8*4];
a2 += - W4*col[8*4];
a3 += + W4*col[8*4]; |
| bb270c08 |
} |
| 4973971e |
|
| bb270c08 |
if (col[8*5]) { |
| 412ba501 |
MAC16(b0, + W5, col[8*5]);
MAC16(b1, - W1, col[8*5]);
MAC16(b2, + W7, col[8*5]);
MAC16(b3, + W3, col[8*5]); |
| bb270c08 |
} |
| 4973971e |
|
| bb270c08 |
if(col[8*6]){ |
| 412ba501 |
a0 += + W6*col[8*6];
a1 += - W2*col[8*6];
a2 += + W2*col[8*6];
a3 += - W6*col[8*6]; |
| bb270c08 |
} |
| 412ba501 |
|
| bb270c08 |
if (col[8*7]) { |
| 412ba501 |
MAC16(b0, + W7, col[8*7]);
MAC16(b1, - W5, col[8*7]);
MAC16(b2, + W3, col[8*7]);
MAC16(b3, - W1, col[8*7]); |
| bb270c08 |
} |
| 412ba501 |
|
| d36a2466 |
dest[0] = cm[dest[0] + ((a0 + b0) >> COL_SHIFT)];
dest += line_size;
dest[0] = cm[dest[0] + ((a1 + b1) >> COL_SHIFT)];
dest += line_size;
dest[0] = cm[dest[0] + ((a2 + b2) >> COL_SHIFT)];
dest += line_size;
dest[0] = cm[dest[0] + ((a3 + b3) >> COL_SHIFT)];
dest += line_size;
dest[0] = cm[dest[0] + ((a3 - b3) >> COL_SHIFT)];
dest += line_size;
dest[0] = cm[dest[0] + ((a2 - b2) >> COL_SHIFT)];
dest += line_size;
dest[0] = cm[dest[0] + ((a1 - b1) >> COL_SHIFT)];
dest += line_size;
dest[0] = cm[dest[0] + ((a0 - b0) >> COL_SHIFT)]; |
| 37e8dcda |
}
|
| 0e15384d |
static inline void idctSparseCol (DCTELEM * col) |
| 86748dbc |
{ |
| bb270c08 |
int a0, a1, a2, a3, b0, b1, b2, b3; |
| 86748dbc |
/* XXX: I did that only to give same values as previous code */ |
| bb270c08 |
a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4));
a1 = a0;
a2 = a0;
a3 = a0; |
| 86748dbc |
a0 += + W2*col[8*2];
a1 += + W6*col[8*2];
a2 += - W6*col[8*2];
a3 += - W2*col[8*2];
|
| edf7c2b2 |
b0 = MUL16(W1, col[8*1]);
b1 = MUL16(W3, col[8*1]);
b2 = MUL16(W5, col[8*1]);
b3 = MUL16(W7, col[8*1]); |
| 86748dbc |
MAC16(b0, + W3, col[8*3]);
MAC16(b1, - W7, col[8*3]);
MAC16(b2, - W1, col[8*3]);
MAC16(b3, - W5, col[8*3]);
|
| bb270c08 |
if(col[8*4]){ |
| 86748dbc |
a0 += + W4*col[8*4];
a1 += - W4*col[8*4];
a2 += - W4*col[8*4];
a3 += + W4*col[8*4]; |
| bb270c08 |
} |
| 86748dbc |
|
| bb270c08 |
if (col[8*5]) { |
| 86748dbc |
MAC16(b0, + W5, col[8*5]);
MAC16(b1, - W1, col[8*5]);
MAC16(b2, + W7, col[8*5]);
MAC16(b3, + W3, col[8*5]); |
| bb270c08 |
} |
| 86748dbc |
|
| bb270c08 |
if(col[8*6]){ |
| 86748dbc |
a0 += + W6*col[8*6];
a1 += - W2*col[8*6];
a2 += + W2*col[8*6];
a3 += - W6*col[8*6]; |
| bb270c08 |
} |
| 86748dbc |
|
| bb270c08 |
if (col[8*7]) { |
| 86748dbc |
MAC16(b0, + W7, col[8*7]);
MAC16(b1, - W5, col[8*7]);
MAC16(b2, + W3, col[8*7]);
MAC16(b3, - W1, col[8*7]); |
| bb270c08 |
} |
| 86748dbc |
col[0 ] = ((a0 + b0) >> COL_SHIFT);
col[8 ] = ((a1 + b1) >> COL_SHIFT);
col[16] = ((a2 + b2) >> COL_SHIFT);
col[24] = ((a3 + b3) >> COL_SHIFT);
col[32] = ((a3 - b3) >> COL_SHIFT);
col[40] = ((a2 - b2) >> COL_SHIFT);
col[48] = ((a1 - b1) >> COL_SHIFT);
col[56] = ((a0 - b0) >> COL_SHIFT);
}
|
| 59e6f60a |
void ff_simple_idct_put(uint8_t *dest, int line_size, DCTELEM *block) |
| d36a2466 |
{
int i;
for(i=0; i<8; i++)
idctRowCondDC(block + i*8); |
| 115329f1 |
|
| d36a2466 |
for(i=0; i<8; i++)
idctSparseColPut(dest + i, line_size, block + i);
}
|
| 59e6f60a |
void ff_simple_idct_add(uint8_t *dest, int line_size, DCTELEM *block) |
| 412ba501 |
{
int i;
for(i=0; i<8; i++)
idctRowCondDC(block + i*8); |
| 115329f1 |
|
| 412ba501 |
for(i=0; i<8; i++) |
| d36a2466 |
idctSparseColAdd(dest + i, line_size, block + i); |
| 4973971e |
} |
| cd4af68a |
|
| 59e6f60a |
void ff_simple_idct(DCTELEM *block) |
| 86748dbc |
{
int i;
for(i=0; i<8; i++)
idctRowCondDC(block + i*8); |
| 115329f1 |
|
| 86748dbc |
for(i=0; i<8; i++)
idctSparseCol(block + i);
}
|
| 9bf71516 |
/* 2x4x8 idct */
#define CN_SHIFT 12
#define C_FIX(x) ((int)((x) * (1 << CN_SHIFT) + 0.5)) |
| 652f0197 |
#define C1 C_FIX(0.6532814824)
#define C2 C_FIX(0.2705980501) |
| 9bf71516 |
|
| 652f0197 |
/* row idct is multiple by 16 * sqrt(2.0), col idct4 is normalized,
and the butterfly must be multiplied by 0.5 * sqrt(2.0) */
#define C_SHIFT (4+1+12) |
| 9bf71516 |
|
| fda767bb |
static inline void idct4col_put(uint8_t *dest, int line_size, const DCTELEM *col) |
| 9bf71516 |
{
int c0, c1, c2, c3, a0, a1, a2, a3; |
| 55fde95e |
const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; |
| 9bf71516 |
a0 = col[8*0];
a1 = col[8*2];
a2 = col[8*4];
a3 = col[8*6]; |
| 652f0197 |
c0 = ((a0 + a2) << (CN_SHIFT - 1)) + (1 << (C_SHIFT - 1));
c2 = ((a0 - a2) << (CN_SHIFT - 1)) + (1 << (C_SHIFT - 1)); |
| 9bf71516 |
c1 = a1 * C1 + a3 * C2;
c3 = a1 * C2 - a3 * C1;
dest[0] = cm[(c0 + c1) >> C_SHIFT];
dest += line_size;
dest[0] = cm[(c2 + c3) >> C_SHIFT];
dest += line_size;
dest[0] = cm[(c2 - c3) >> C_SHIFT];
dest += line_size;
dest[0] = cm[(c0 - c1) >> C_SHIFT];
}
#define BF(k) \
{\
int a0, a1;\
a0 = ptr[k];\
a1 = ptr[8 + k];\
ptr[k] = a0 + a1;\
ptr[8 + k] = a0 - a1;\
}
/* only used by DV codec. The input must be interlaced. 128 is added
to the pixels before clamping to avoid systematic error
(1024*sqrt(2)) offset would be needed otherwise. */
/* XXX: I think a 1.0/sqrt(2) normalization should be needed to
compensate the extra butterfly stage - I don't have the full DV
specification */ |
| 59e6f60a |
void ff_simple_idct248_put(uint8_t *dest, int line_size, DCTELEM *block) |
| 9bf71516 |
{
int i; |
| 0e15384d |
DCTELEM *ptr; |
| 115329f1 |
|
| 9bf71516 |
/* butterfly */
ptr = block;
for(i=0;i<4;i++) {
BF(0);
BF(1);
BF(2);
BF(3);
BF(4);
BF(5);
BF(6);
BF(7);
ptr += 2 * 8;
}
/* IDCT8 on each line */
for(i=0; i<8; i++) {
idctRowCondDC(block + i*8);
}
/* IDCT4 and store */
for(i=0;i<8;i++) { |
| fda767bb |
idct4col_put(dest + i, 2 * line_size, block + i);
idct4col_put(dest + line_size + i, 2 * line_size, block + 8 + i); |
| 9bf71516 |
}
} |
| 1457ab52 |
/* 8x4 & 4x8 WMV2 IDCT */
#undef CN_SHIFT
#undef C_SHIFT
#undef C_FIX
#undef C1
#undef C2
#define CN_SHIFT 12
#define C_FIX(x) ((int)((x) * 1.414213562 * (1 << CN_SHIFT) + 0.5))
#define C1 C_FIX(0.6532814824)
#define C2 C_FIX(0.2705980501)
#define C3 C_FIX(0.5)
#define C_SHIFT (4+1+12) |
| 0c1a9eda |
static inline void idct4col_add(uint8_t *dest, int line_size, const DCTELEM *col) |
| 1457ab52 |
{
int c0, c1, c2, c3, a0, a1, a2, a3; |
| 55fde95e |
const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; |
| 1457ab52 |
a0 = col[8*0];
a1 = col[8*1];
a2 = col[8*2];
a3 = col[8*3];
c0 = (a0 + a2)*C3 + (1 << (C_SHIFT - 1));
c2 = (a0 - a2)*C3 + (1 << (C_SHIFT - 1));
c1 = a1 * C1 + a3 * C2;
c3 = a1 * C2 - a3 * C1;
dest[0] = cm[dest[0] + ((c0 + c1) >> C_SHIFT)];
dest += line_size;
dest[0] = cm[dest[0] + ((c2 + c3) >> C_SHIFT)];
dest += line_size;
dest[0] = cm[dest[0] + ((c2 - c3) >> C_SHIFT)];
dest += line_size;
dest[0] = cm[dest[0] + ((c0 - c1) >> C_SHIFT)];
}
#define RN_SHIFT 15
#define R_FIX(x) ((int)((x) * 1.414213562 * (1 << RN_SHIFT) + 0.5))
#define R1 R_FIX(0.6532814824)
#define R2 R_FIX(0.2705980501)
#define R3 R_FIX(0.5)
#define R_SHIFT 11 |
| 0e15384d |
static inline void idct4row(DCTELEM *row) |
| 1457ab52 |
{
int c0, c1, c2, c3, a0, a1, a2, a3; |
| 55fde95e |
//const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; |
| 1457ab52 |
a0 = row[0];
a1 = row[1];
a2 = row[2];
a3 = row[3];
c0 = (a0 + a2)*R3 + (1 << (R_SHIFT - 1));
c2 = (a0 - a2)*R3 + (1 << (R_SHIFT - 1));
c1 = a1 * R1 + a3 * R2;
c3 = a1 * R2 - a3 * R1;
row[0]= (c0 + c1) >> R_SHIFT;
row[1]= (c2 + c3) >> R_SHIFT;
row[2]= (c2 - c3) >> R_SHIFT;
row[3]= (c0 - c1) >> R_SHIFT;
}
|
| 59e6f60a |
void ff_simple_idct84_add(uint8_t *dest, int line_size, DCTELEM *block) |
| 1457ab52 |
{
int i;
/* IDCT8 on each line */
for(i=0; i<4; i++) {
idctRowCondDC(block + i*8);
}
/* IDCT4 and store */
for(i=0;i<8;i++) {
idct4col_add(dest + i, line_size, block + i);
}
}
|
| 59e6f60a |
void ff_simple_idct48_add(uint8_t *dest, int line_size, DCTELEM *block) |
| 1457ab52 |
{
int i;
/* IDCT4 on each line */
for(i=0; i<8; i++) {
idct4row(block + i*8);
}
/* IDCT8 and store */
for(i=0; i<4; i++){
idctSparseColAdd(dest + i, line_size, block + i);
}
}
|
| 91823a6e |
void ff_simple_idct44_add(uint8_t *dest, int line_size, DCTELEM *block)
{
int i;
/* IDCT4 on each line */
for(i=0; i<4; i++) {
idct4row(block + i*8);
}
/* IDCT4 and store */
for(i=0; i<4; i++){
idct4col_add(dest + i, line_size, block + i);
}
} |