/*
- Copyright (C) 2001 Michael Niedermayer (michaelni@gmx.at)
+ * Simple IDCT
+ *
+ * Copyright (c) 2001 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 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
+ */
- 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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>)
-*/
-
-#include <inttypes.h>
-
+ based upon some outcommented c code from mpeg2dec (idct_mmx.c
+ written by Aaron Holtzman <aholtzma@ess.engr.uvic.ca>)
+ */
+#include "avcodec.h"
+#include "dsputil.h"
#include "simple_idct.h"
#if 0
#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
-#define W4 16384 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
+#define W4 16383 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
#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
-#if 1
-static void inline idctRow (int16_t * row)
+
+#if defined(ARCH_POWERPC_405)
+
+/* signed 16x16 -> 32 multiply add accumulate */
+#define MAC16(rt, ra, rb) \
+ asm ("maclhw %0, %2, %3" : "=r" (rt) : "0" (rt), "r" (ra), "r" (rb));
+
+/* signed 16x16 -> 32 multiply */
+#define MUL16(rt, ra, rb) \
+ asm ("mullhw %0, %1, %2" : "=r" (rt) : "r" (ra), "r" (rb));
+
+#else
+
+/* signed 16x16 -> 32 multiply add accumulate */
+#define MAC16(rt, ra, rb) rt += (ra) * (rb)
+
+/* signed 16x16 -> 32 multiply */
+#define MUL16(rt, ra, rb) rt = (ra) * (rb)
+
+#endif
+
+static inline void idctRowCondDC (DCTELEM * row)
{
- int a0, a1, a2, a3, b0, b1, b2, b3;
- const int C1 =W1;
- const int C2 =W2;
- const int C3 =W3;
- const int C4 =W4;
- const int C5 =W5;
- const int C6 =W6;
- const int C7 =W7;
-
- 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;
- }
-
- a0 = C4*row[0] + C2*row[2] + C4*row[4] + C6*row[6] + (1<<(ROW_SHIFT-1));
- a1 = C4*row[0] + C6*row[2] - C4*row[4] - C2*row[6] + (1<<(ROW_SHIFT-1));
- a2 = C4*row[0] - C6*row[2] - C4*row[4] + C2*row[6] + (1<<(ROW_SHIFT-1));
- a3 = C4*row[0] - C2*row[2] + C4*row[4] - C6*row[6] + (1<<(ROW_SHIFT-1));
-
- b0 = C1*row[1] + C3*row[3] + C5*row[5] + C7*row[7];
- b1 = C3*row[1] - C7*row[3] - C1*row[5] - C5*row[7];
- b2 = C5*row[1] - C1*row[3] + C7*row[5] + C3*row[7];
- b3 = C7*row[1] - C5*row[3] + C3*row[5] - C1*row[7];
-
- row[0] = (a0 + b0) >> ROW_SHIFT;
- row[1] = (a1 + b1) >> ROW_SHIFT;
- row[2] = (a2 + b2) >> ROW_SHIFT;
- row[3] = (a3 + b3) >> ROW_SHIFT;
- row[4] = (a3 - b3) >> ROW_SHIFT;
- row[5] = (a2 - b2) >> ROW_SHIFT;
- row[6] = (a1 - b1) >> ROW_SHIFT;
- row[7] = (a0 - b0) >> ROW_SHIFT;
+ int a0, a1, a2, a3, b0, b1, b2, b3;
+#ifdef HAVE_FAST_64BIT
+ uint64_t temp;
+#else
+ uint32_t temp;
+#endif
+
+#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) |
+ ((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;
+ }
+ }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;
+ }
+ }
+#else
+ if(sizeof(DCTELEM)==2){
+ if (!(((uint32_t*)row)[1] |
+ ((uint32_t*)row)[2] |
+ ((uint32_t*)row)[3] |
+ 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;
+ }
+ }
+#endif
+
+ a0 = (W4 * row[0]) + (1 << (ROW_SHIFT - 1));
+ a1 = a0;
+ a2 = a0;
+ a3 = a0;
+
+ /* no need to optimize : gcc does it */
+ a0 += W2 * row[2];
+ a1 += W6 * row[2];
+ a2 -= W6 * row[2];
+ a3 -= W2 * row[2];
+
+ MUL16(b0, W1, row[1]);
+ MAC16(b0, W3, row[3]);
+ MUL16(b1, W3, row[1]);
+ MAC16(b1, -W7, row[3]);
+ MUL16(b2, W5, row[1]);
+ MAC16(b2, -W1, row[3]);
+ MUL16(b3, W7, row[1]);
+ MAC16(b3, -W5, row[3]);
+
+#ifdef HAVE_FAST_64BIT
+ temp = ((uint64_t*)row)[1];
+#else
+ temp = ((uint32_t*)row)[2] | ((uint32_t*)row)[3];
+#endif
+ if (temp != 0) {
+ 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]);
+
+ 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;
}
-static void inline idctCol (int16_t * col)
+static inline void idctSparseColPut (uint8_t *dest, int line_size,
+ DCTELEM * col)
{
- int a0, a1, a2, a3, b0, b1, b2, b3;
- const int C1 =W1;
- const int C2 =W2;
- const int C3 =W3;
- const int C4 =W4;
- const int C5 =W5;
- const int C6 =W6;
- const int C7 =W7;
-/*
- if( !(col[8*1] | col[8*2] |col[8*3] |col[8*4] |col[8*5] |col[8*6] | col[8*7])) {
- col[8*0] = col[8*1] = col[8*2] = col[8*3] = col[8*4] =
- col[8*5] = col[8*6] = col[8*7] = col[8*0]<<3;
- return;
- }*/
- col[0] += (1<<(COL_SHIFT-1))/W4;
- a0 = C4*col[8*0] + C2*col[8*2] + C4*col[8*4] + C6*col[8*6];
- a1 = C4*col[8*0] + C6*col[8*2] - C4*col[8*4] - C2*col[8*6];
- a2 = C4*col[8*0] - C6*col[8*2] - C4*col[8*4] + C2*col[8*6];
- a3 = C4*col[8*0] - C2*col[8*2] + C4*col[8*4] - C6*col[8*6];
-
- b0 = C1*col[8*1] + C3*col[8*3] + C5*col[8*5] + C7*col[8*7];
- b1 = C3*col[8*1] - C7*col[8*3] - C1*col[8*5] - C5*col[8*7];
- b2 = C5*col[8*1] - C1*col[8*3] + C7*col[8*5] + C3*col[8*7];
- b3 = C7*col[8*1] - C5*col[8*3] + C3*col[8*5] - C1*col[8*7];
-
- col[8*0] = (a0 + b0) >> COL_SHIFT;
- col[8*1] = (a1 + b1) >> COL_SHIFT;
- col[8*2] = (a2 + b2) >> COL_SHIFT;
- col[8*3] = (a3 + b3) >> COL_SHIFT;
- col[8*4] = (a3 - b3) >> COL_SHIFT;
- col[8*5] = (a2 - b2) >> COL_SHIFT;
- col[8*6] = (a1 - b1) >> COL_SHIFT;
- col[8*7] = (a0 - b0) >> COL_SHIFT;
+ 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 += + W2*col[8*2];
+ a1 += + W6*col[8*2];
+ a2 += - W6*col[8*2];
+ a3 += - W2*col[8*2];
+
+ MUL16(b0, W1, col[8*1]);
+ MUL16(b1, W3, col[8*1]);
+ MUL16(b2, W5, col[8*1]);
+ MUL16(b3, W7, col[8*1]);
+
+ MAC16(b0, + W3, col[8*3]);
+ MAC16(b1, - W7, col[8*3]);
+ MAC16(b2, - W1, col[8*3]);
+ MAC16(b3, - W5, col[8*3]);
+
+ 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]) {
+ 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]){
+ a0 += + W6*col[8*6];
+ a1 += - W2*col[8*6];
+ a2 += + W2*col[8*6];
+ a3 += - W6*col[8*6];
+ }
+
+ 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[(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];
}
-void simple_idct (short *block)
+static inline void idctSparseColAdd (uint8_t *dest, int line_size,
+ DCTELEM * col)
{
- int i;
- for(i=0; i<8; i++)
- idctRow(block + 8*i);
+ 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 += + W2*col[8*2];
+ a1 += + W6*col[8*2];
+ a2 += - W6*col[8*2];
+ a3 += - W2*col[8*2];
+
+ MUL16(b0, W1, col[8*1]);
+ MUL16(b1, W3, col[8*1]);
+ MUL16(b2, W5, col[8*1]);
+ MUL16(b3, W7, col[8*1]);
+
+ MAC16(b0, + W3, col[8*3]);
+ MAC16(b1, - W7, col[8*3]);
+ MAC16(b2, - W1, col[8*3]);
+ MAC16(b3, - W5, col[8*3]);
+
+ 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]) {
+ MAC16(b0, + W5, col[8*5]);
+ MAC16(b1, - W1, col[8*5]);
+ MAC16(b2, + W7, col[8*5]);
+ MAC16(b3, + W3, col[8*5]);
+ }
- for(i=0; i<8; i++)
- idctCol(block + i);
+ 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]) {
+ 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;
+ 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)];
}
-#else
+static inline void idctSparseCol (DCTELEM * col)
+{
+ int a0, a1, a2, a3, b0, b1, b2, b3;
-#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
-#define W4 16384 //cos(i*M_PI/16)*sqrt(2)*(1<<14) + 0.5
-#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 COL_SHIFT 31 // 6
+ /* 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 += + W2*col[8*2];
+ a1 += + W6*col[8*2];
+ a2 += - W6*col[8*2];
+ a3 += - W2*col[8*2];
+
+ MUL16(b0, W1, col[8*1]);
+ MUL16(b1, W3, col[8*1]);
+ MUL16(b2, W5, col[8*1]);
+ MUL16(b3, W7, col[8*1]);
+
+ MAC16(b0, + W3, col[8*3]);
+ MAC16(b1, - W7, col[8*3]);
+ MAC16(b2, - W1, col[8*3]);
+ MAC16(b3, - W5, col[8*3]);
+
+ if(col[8*4]){
+ a0 += + W4*col[8*4];
+ a1 += - W4*col[8*4];
+ a2 += - W4*col[8*4];
+ a3 += + W4*col[8*4];
+ }
-static void inline idctRow (int32_t *out, int16_t * row)
+ 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]){
+ a0 += + W6*col[8*6];
+ a1 += - W2*col[8*6];
+ a2 += + W2*col[8*6];
+ a3 += - W6*col[8*6];
+ }
+
+ 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[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);
+}
+
+void ff_simple_idct_put(uint8_t *dest, int line_size, DCTELEM *block)
{
- int a0, a1, a2, a3, b0, b1, b2, b3;
- const int C1 =W1;
- const int C2 =W2;
- const int C3 =W3;
- const int C4 =W4;
- const int C5 =W5;
- const int C6 =W6;
- const int C7 =W7;
-/*
- 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]<<14;
- return;
- }
-*/
- a0 = C4*row[0] + C2*row[2] + C4*row[4] + C6*row[6];
- a1 = C4*row[0] + C6*row[2] - C4*row[4] - C2*row[6];
- a2 = C4*row[0] - C6*row[2] - C4*row[4] + C2*row[6];
- a3 = C4*row[0] - C2*row[2] + C4*row[4] - C6*row[6];
-
- b0 = C1*row[1] + C3*row[3] + C5*row[5] + C7*row[7];
- b1 = C3*row[1] - C7*row[3] - C1*row[5] - C5*row[7];
- b2 = C5*row[1] - C1*row[3] + C7*row[5] + C3*row[7];
- b3 = C7*row[1] - C5*row[3] + C3*row[5] - C1*row[7];
-
- out[0] = (a0 + b0);
- out[1] = (a1 + b1);
- out[2] = (a2 + b2);
- out[3] = (a3 + b3);
- out[4] = (a3 - b3);
- out[5] = (a2 - b2);
- out[6] = (a1 - b1);
- out[7] = (a0 - b0);
+ 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);
}
-static void inline idctCol (int32_t *in, int16_t * col)
+void ff_simple_idct_add(uint8_t *dest, int line_size, DCTELEM *block)
{
- int64_t a0, a1, a2, a3, b0, b1, b2, b3;
- const int64_t C1 =W1;
- const int64_t C2 =W2;
- const int64_t C3 =W3;
- const int64_t C4 =W4;
- const int64_t C5 =W5;
- const int64_t C6 =W6;
- const int64_t C7 =W7;
-/*
- if( !(col[8*1] | col[8*2] |col[8*3] |col[8*4] |col[8*5] |col[8*6] | col[8*7])) {
- col[8*0] = col[8*1] = col[8*2] = col[8*3] = col[8*4] =
- col[8*5] = col[8*6] = col[8*7] = col[8*0]<<3;
- return;
- }*/
- in[0] += (1<<(COL_SHIFT-1))/W4;
- a0 = C4*in[8*0] + C2*in[8*2] + C4*in[8*4] + C6*in[8*6];
- a1 = C4*in[8*0] + C6*in[8*2] - C4*in[8*4] - C2*in[8*6];
- a2 = C4*in[8*0] - C6*in[8*2] - C4*in[8*4] + C2*in[8*6];
- a3 = C4*in[8*0] - C2*in[8*2] + C4*in[8*4] - C6*in[8*6];
-
- b0 = C1*in[8*1] + C3*in[8*3] + C5*in[8*5] + C7*in[8*7];
- b1 = C3*in[8*1] - C7*in[8*3] - C1*in[8*5] - C5*in[8*7];
- b2 = C5*in[8*1] - C1*in[8*3] + C7*in[8*5] + C3*in[8*7];
- b3 = C7*in[8*1] - C5*in[8*3] + C3*in[8*5] - C1*in[8*7];
-
- col[8*0] = (a0 + b0) >> COL_SHIFT;
- col[8*1] = (a1 + b1) >> COL_SHIFT;
- col[8*2] = (a2 + b2) >> COL_SHIFT;
- col[8*3] = (a3 + b3) >> COL_SHIFT;
- col[8*4] = (a3 - b3) >> COL_SHIFT;
- col[8*5] = (a2 - b2) >> COL_SHIFT;
- col[8*6] = (a1 - b1) >> COL_SHIFT;
- col[8*7] = (a0 - b0) >> COL_SHIFT;
+ 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 (short *block)
+void ff_simple_idct(DCTELEM *block)
{
- int i;
- int32_t temp[64];
- for(i=0; i<8; i++)
- idctRow(temp+8*i, block + 8*i);
+ int i;
+ for(i=0; i<8; i++)
+ idctRowCondDC(block + i*8);
+
+ for(i=0; i<8; i++)
+ idctSparseCol(block + i);
+}
- for(i=0; i<8; i++)
- idctCol(temp+i, block + i);
+/* 2x4x8 idct */
+#define CN_SHIFT 12
+#define C_FIX(x) ((int)((x) * (1 << CN_SHIFT) + 0.5))
+#define C1 C_FIX(0.6532814824)
+#define C2 C_FIX(0.2705980501)
+
+/* 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)
+
+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 = ff_cropTbl + MAX_NEG_CROP;
+
+ a0 = col[8*0];
+ a1 = col[8*2];
+ a2 = col[8*4];
+ a3 = col[8*6];
+ c0 = ((a0 + a2) << (CN_SHIFT - 1)) + (1 << (C_SHIFT - 1));
+ c2 = ((a0 - a2) << (CN_SHIFT - 1)) + (1 << (C_SHIFT - 1));
+ 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];
}
-#endif
+#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 */
+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++) {
+ 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++) {
+ idct4col_put(dest + i, 2 * line_size, block + i);
+ idct4col_put(dest + line_size + i, 2 * line_size, block + 8 + i);
+ }
+}
+
+/* 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)
+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 = ff_cropTbl + MAX_NEG_CROP;
+
+ 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
+static inline void idct4row(DCTELEM *row)
+{
+ int c0, c1, c2, c3, a0, a1, a2, a3;
+ //const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
+
+ 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;
+}
+
+void ff_simple_idct84_add(uint8_t *dest, int line_size, DCTELEM *block)
+{
+ 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);
+ }
+}
+
+void ff_simple_idct48_add(uint8_t *dest, int line_size, DCTELEM *block)
+{
+ 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);
+ }
+}
+
+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