*
* Copyright (c) 2001 Michael Niedermayer <michaelni@gmx.at>
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file simple_idct.c
+ * simpleidct in C.
*/
+
/*
based upon some outcommented c code from mpeg2dec (idct_mmx.c
- written by Aaron Holtzman <aholtzma@ess.engr.uvic.ca>)
+ written by Aaron Holtzman <aholtzma@ess.engr.uvic.ca>)
*/
#include "avcodec.h"
#include "dsputil.h"
static inline void idctRowCondDC (DCTELEM * row)
{
- int a0, a1, a2, a3, b0, b1, b2, b3;
-#ifdef FAST_64BIT
+ int a0, a1, a2, a3, b0, b1, b2, b3;
+#ifdef HAVE_FAST_64BIT
uint64_t temp;
#else
uint32_t temp;
#endif
-#ifdef FAST_64BIT
+#ifdef HAVE_FAST_64BIT
#ifdef WORDS_BIGENDIAN
#define ROW0_MASK 0xffff000000000000LL
#else
#define ROW0_MASK 0xffffLL
#endif
if(sizeof(DCTELEM)==2){
- if ( ((((uint64_t *)row)[0] & ~ROW0_MASK) |
+ if ( ((((uint64_t *)row)[0] & ~ROW0_MASK) |
((uint64_t *)row)[1]) == 0) {
temp = (row[0] << 3) & 0xffff;
temp += temp << 16;
((uint64_t *)row)[0] = temp;
((uint64_t *)row)[1] = 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;
if(sizeof(DCTELEM)==2){
if (!(((uint32_t*)row)[1] |
((uint32_t*)row)[2] |
- ((uint32_t*)row)[3] |
+ ((uint32_t*)row)[3] |
row[1])) {
temp = (row[0] << 3) & 0xffff;
temp += temp << 16;
#endif
a0 = (W4 * row[0]) + (1 << (ROW_SHIFT - 1));
- a1 = a0;
- a2 = a0;
- a3 = a0;
+ a1 = a0;
+ a2 = a0;
+ a3 = a0;
/* no need to optimize : gcc does it */
a0 += W2 * row[2];
MUL16(b3, W7, row[1]);
MAC16(b3, -W5, row[3]);
-#ifdef FAST_64BIT
+#ifdef HAVE_FAST_64BIT
temp = ((uint64_t*)row)[1];
#else
temp = ((uint32_t*)row)[2] | ((uint32_t*)row)[3];
#endif
- if (temp != 0) {
+ if (temp != 0) {
a0 += W4*row[4] + W6*row[6];
a1 += - W4*row[4] - W2*row[6];
a2 += - W4*row[4] + W2*row[6];
MAC16(b0, W5, row[5]);
MAC16(b0, W7, row[7]);
-
+
MAC16(b1, -W1, row[5]);
MAC16(b1, -W5, row[7]);
-
+
MAC16(b2, W7, row[5]);
MAC16(b2, W3, row[7]);
-
+
MAC16(b3, W3, row[5]);
MAC16(b3, -W1, row[7]);
- }
-
- 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;
+ }
+
+ 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;
}
-static inline void idctSparseColPut (uint8_t *dest, int line_size,
+static inline void idctSparseColPut (uint8_t *dest, int line_size,
DCTELEM * col)
{
- int a0, a1, a2, a3, b0, b1, b2, b3;
- uint8_t *cm = cropTbl + MAX_NEG_CROP;
+ int a0, a1, a2, a3, b0, b1, b2, b3;
+ uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
/* XXX: I did that only to give same values as previous code */
- a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4));
- a1 = a0;
- a2 = a0;
- a3 = a0;
+ a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4));
+ a1 = a0;
+ a2 = a0;
+ a3 = a0;
a0 += + W2*col[8*2];
a1 += + W6*col[8*2];
MAC16(b2, - W1, col[8*3]);
MAC16(b3, - W5, col[8*3]);
- if(col[8*4]){
+ if(col[8*4]){
a0 += + W4*col[8*4];
a1 += - W4*col[8*4];
a2 += - W4*col[8*4];
a3 += + W4*col[8*4];
- }
+ }
- if (col[8*5]) {
+ if (col[8*5]) {
MAC16(b0, + W5, col[8*5]);
MAC16(b1, - W1, col[8*5]);
MAC16(b2, + W7, col[8*5]);
MAC16(b3, + W3, col[8*5]);
- }
+ }
- if(col[8*6]){
+ if(col[8*6]){
a0 += + W6*col[8*6];
a1 += - W2*col[8*6];
a2 += + W2*col[8*6];
a3 += - W6*col[8*6];
- }
+ }
- if (col[8*7]) {
+ if (col[8*7]) {
MAC16(b0, + W7, col[8*7]);
MAC16(b1, - W5, col[8*7]);
MAC16(b2, + W3, col[8*7]);
MAC16(b3, - W1, col[8*7]);
- }
+ }
dest[0] = cm[(a0 + b0) >> COL_SHIFT];
dest += line_size;
dest[0] = cm[(a0 - b0) >> COL_SHIFT];
}
-static inline void idctSparseColAdd (uint8_t *dest, int line_size,
+static inline void idctSparseColAdd (uint8_t *dest, int line_size,
DCTELEM * col)
{
- int a0, a1, a2, a3, b0, b1, b2, b3;
- uint8_t *cm = cropTbl + MAX_NEG_CROP;
+ int a0, a1, a2, a3, b0, b1, b2, b3;
+ uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
/* XXX: I did that only to give same values as previous code */
- a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4));
- a1 = a0;
- a2 = a0;
- a3 = a0;
+ a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4));
+ a1 = a0;
+ a2 = a0;
+ a3 = a0;
a0 += + W2*col[8*2];
a1 += + W6*col[8*2];
MAC16(b2, - W1, col[8*3]);
MAC16(b3, - W5, col[8*3]);
- if(col[8*4]){
+ if(col[8*4]){
a0 += + W4*col[8*4];
a1 += - W4*col[8*4];
a2 += - W4*col[8*4];
a3 += + W4*col[8*4];
- }
+ }
- if (col[8*5]) {
+ if (col[8*5]) {
MAC16(b0, + W5, col[8*5]);
MAC16(b1, - W1, col[8*5]);
MAC16(b2, + W7, col[8*5]);
MAC16(b3, + W3, col[8*5]);
- }
+ }
- if(col[8*6]){
+ if(col[8*6]){
a0 += + W6*col[8*6];
a1 += - W2*col[8*6];
a2 += + W2*col[8*6];
a3 += - W6*col[8*6];
- }
+ }
- if (col[8*7]) {
+ if (col[8*7]) {
MAC16(b0, + W7, col[8*7]);
MAC16(b1, - W5, col[8*7]);
MAC16(b2, + W3, col[8*7]);
MAC16(b3, - W1, col[8*7]);
- }
+ }
dest[0] = cm[dest[0] + ((a0 + b0) >> COL_SHIFT)];
dest += line_size;
static inline void idctSparseCol (DCTELEM * col)
{
- int a0, a1, a2, a3, b0, b1, b2, b3;
+ int a0, a1, a2, a3, b0, b1, b2, b3;
/* XXX: I did that only to give same values as previous code */
- a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4));
- a1 = a0;
- a2 = a0;
- a3 = a0;
+ a0 = W4 * (col[8*0] + ((1<<(COL_SHIFT-1))/W4));
+ a1 = a0;
+ a2 = a0;
+ a3 = a0;
a0 += + W2*col[8*2];
a1 += + W6*col[8*2];
MAC16(b2, - W1, col[8*3]);
MAC16(b3, - W5, col[8*3]);
- if(col[8*4]){
+ if(col[8*4]){
a0 += + W4*col[8*4];
a1 += - W4*col[8*4];
a2 += - W4*col[8*4];
a3 += + W4*col[8*4];
- }
+ }
- if (col[8*5]) {
+ if (col[8*5]) {
MAC16(b0, + W5, col[8*5]);
MAC16(b1, - W1, col[8*5]);
MAC16(b2, + W7, col[8*5]);
MAC16(b3, + W3, col[8*5]);
- }
+ }
- if(col[8*6]){
+ if(col[8*6]){
a0 += + W6*col[8*6];
a1 += - W2*col[8*6];
a2 += + W2*col[8*6];
a3 += - W6*col[8*6];
- }
+ }
- if (col[8*7]) {
+ if (col[8*7]) {
MAC16(b0, + W7, col[8*7]);
MAC16(b1, - W5, col[8*7]);
MAC16(b2, + W3, col[8*7]);
MAC16(b3, - W1, col[8*7]);
- }
+ }
col[0 ] = ((a0 + b0) >> COL_SHIFT);
col[8 ] = ((a1 + b1) >> COL_SHIFT);
col[56] = ((a0 - b0) >> COL_SHIFT);
}
-void simple_idct_put(uint8_t *dest, int line_size, DCTELEM *block)
+void ff_simple_idct_put(uint8_t *dest, int line_size, DCTELEM *block)
{
int i;
for(i=0; i<8; i++)
idctRowCondDC(block + i*8);
-
+
for(i=0; i<8; i++)
idctSparseColPut(dest + i, line_size, block + i);
}
-void simple_idct_add(uint8_t *dest, int line_size, DCTELEM *block)
+void ff_simple_idct_add(uint8_t *dest, int line_size, DCTELEM *block)
{
int i;
for(i=0; i<8; i++)
idctRowCondDC(block + i*8);
-
+
for(i=0; i<8; i++)
idctSparseColAdd(dest + i, line_size, block + i);
}
-void simple_idct(DCTELEM *block)
+void ff_simple_idct(DCTELEM *block)
{
int i;
for(i=0; i<8; i++)
idctRowCondDC(block + i*8);
-
+
for(i=0; i<8; i++)
idctSparseCol(block + i);
}
and the butterfly must be multiplied by 0.5 * sqrt(2.0) */
#define C_SHIFT (4+1+12)
-static inline void idct4col(uint8_t *dest, int line_size, const DCTELEM *col)
+static inline void idct4col_put(uint8_t *dest, int line_size, const DCTELEM *col)
{
int c0, c1, c2, c3, a0, a1, a2, a3;
- const uint8_t *cm = cropTbl + MAX_NEG_CROP;
+ const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
a0 = col[8*0];
a1 = col[8*2];
/* 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 */
-void simple_idct248_put(uint8_t *dest, int line_size, DCTELEM *block)
+void ff_simple_idct248_put(uint8_t *dest, int line_size, DCTELEM *block)
{
int i;
DCTELEM *ptr;
-
+
/* butterfly */
ptr = block;
for(i=0;i<4;i++) {
/* IDCT4 and store */
for(i=0;i<8;i++) {
- idct4col(dest + i, 2 * line_size, block + i);
- idct4col(dest + line_size + i, 2 * line_size, block + 8 + i);
+ idct4col_put(dest + i, 2 * line_size, block + i);
+ idct4col_put(dest + line_size + i, 2 * line_size, block + 8 + i);
}
}
static inline void idct4col_add(uint8_t *dest, int line_size, const DCTELEM *col)
{
int c0, c1, c2, c3, a0, a1, a2, a3;
- const uint8_t *cm = cropTbl + MAX_NEG_CROP;
+ const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
a0 = col[8*0];
a1 = col[8*1];
static inline void idct4row(DCTELEM *row)
{
int c0, c1, c2, c3, a0, a1, a2, a3;
- //const uint8_t *cm = cropTbl + MAX_NEG_CROP;
+ //const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
a0 = row[0];
a1 = row[1];
row[3]= (c0 - c1) >> R_SHIFT;
}
-void simple_idct84_add(uint8_t *dest, int line_size, DCTELEM *block)
+void ff_simple_idct84_add(uint8_t *dest, int line_size, DCTELEM *block)
{
int i;
}
}
-void simple_idct48_add(uint8_t *dest, int line_size, DCTELEM *block)
+void ff_simple_idct48_add(uint8_t *dest, int line_size, DCTELEM *block)
{
int i;
}
}
+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);
+ }
+}
projects / ffmpeg / blobdiff