*
* Copyright (c) 2001 Michael Niedermayer <michaelni@gmx.at>
*
- * This library is free software; you can redistribute it and/or
+ * 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 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,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-/*
- based upon some outcommented c code from mpeg2dec (idct_mmx.c
- written by Aaron Holtzman <aholtzma@ess.engr.uvic.ca>)
+
+/**
+ * @file
+ * simpleidct in C.
*/
+
+#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "dsputil.h"
+#include "mathops.h"
#include "simple_idct.h"
-//#define ARCH_ALPHA
-
-#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
-#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
-
-#ifdef ARCH_ALPHA
-#define FAST_64BIT
-#endif
-
-#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
-
-#ifdef ARCH_ALPHA
-/* 0: all entries 0, 1: only first entry nonzero, 2: otherwise */
-static inline int idctRowCondDC(int16_t *row)
-{
- int_fast32_t a0, a1, a2, a3, b0, b1, b2, b3;
- uint64_t *lrow = (uint64_t *) row;
-
- if (lrow[1] == 0) {
- if (lrow[0] == 0)
- return 0;
- if ((lrow[0] & ~0xffffULL) == 0) {
- uint64_t v;
-#if 1 //is ok if |a0| < 1024 than theres an +-1 error (for the *W4 case for W4=16383 !!!)
- a0 = row[0]<<3;
-#else
- a0 = W4 * row[0];
- a0 += 1 << (ROW_SHIFT - 1);
- a0 >>= ROW_SHIFT;
-#endif
- v = (uint16_t) a0;
- v += v << 16;
- v += v << 32;
- lrow[0] = v;
- lrow[1] = v;
-
- return 1;
- }
- }
-
- a0 = (W4 * row[0]) + (1 << (ROW_SHIFT - 1));
- a1 = a0;
- a2 = a0;
- a3 = a0;
-
- if (row[2]) {
- a0 += W2 * row[2];
- a1 += W6 * row[2];
- a2 -= W6 * row[2];
- a3 -= W2 * row[2];
- }
-
- if (row[4]) {
- a0 += W4 * row[4];
- a1 -= W4 * row[4];
- a2 -= W4 * row[4];
- a3 += W4 * row[4];
- }
-
- if (row[6]) {
- a0 += W6 * row[6];
- a1 -= W2 * row[6];
- a2 += W2 * row[6];
- a3 -= W6 * row[6];
- }
-
- if (row[1]) {
- b0 = W1 * row[1];
- b1 = W3 * row[1];
- b2 = W5 * row[1];
- b3 = W7 * row[1];
- } else {
- b0 = 0;
- b1 = 0;
- b2 = 0;
- b3 = 0;
- }
-
- if (row[3]) {
- b0 += W3 * row[3];
- b1 -= W7 * row[3];
- b2 -= W1 * row[3];
- b3 -= W5 * row[3];
- }
-
- if (row[5]) {
- b0 += W5 * row[5];
- b1 -= W1 * row[5];
- b2 += W7 * row[5];
- b3 += W3 * row[5];
- }
-
- if (row[7]) {
- b0 += W7 * row[7];
- b1 -= W5 * row[7];
- b2 += W3 * row[7];
- b3 -= W1 * 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;
-
- return 2;
-}
-
-inline static void idctSparseCol2(int16_t *col)
-{
- int a0, a1, a2, a3, b0, b1, b2, b3;
-
- col[0] += (1 << (COL_SHIFT - 1)) / W4;
-
- a0 = W4 * col[8 * 0];
- a1 = W4 * col[8 * 0];
- a2 = W4 * col[8 * 0];
- a3 = W4 * col[8 * 0];
-
- if (col[8 * 2]) {
- a0 += W2 * col[8 * 2];
- a1 += W6 * col[8 * 2];
- a2 -= W6 * col[8 * 2];
- a3 -= W2 * col[8 * 2];
- }
-
- 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 * 6]) {
- a0 += W6 * col[8 * 6];
- a1 -= W2 * col[8 * 6];
- a2 += W2 * col[8 * 6];
- a3 -= W6 * col[8 * 6];
- }
-
- if (col[8 * 1]) {
- b0 = W1 * col[8 * 1];
- b1 = W3 * col[8 * 1];
- b2 = W5 * col[8 * 1];
- b3 = W7 * col[8 * 1];
- } else {
- b0 = b1 = b2 = b3 = 0;
- }
-
- if (col[8 * 3]) {
- b0 += W3 * col[8 * 3];
- b1 -= W7 * col[8 * 3];
- b2 -= W1 * col[8 * 3];
- b3 -= W5 * col[8 * 3];
- }
-
- if (col[8 * 5]) {
- b0 += W5 * col[8 * 5];
- b1 -= W1 * col[8 * 5];
- b2 += W7 * col[8 * 5];
- b3 += W3 * col[8 * 5];
- }
-
- if (col[8 * 7]) {
- b0 += W7 * col[8 * 7];
- b1 -= W5 * col[8 * 7];
- b2 += W3 * col[8 * 7];
- b3 -= W1 * col[8 * 7];
- }
-
- col[8 * 0] = (a0 + b0) >> COL_SHIFT;
- col[8 * 7] = (a0 - b0) >> COL_SHIFT;
- col[8 * 1] = (a1 + b1) >> COL_SHIFT;
- col[8 * 6] = (a1 - b1) >> COL_SHIFT;
- col[8 * 2] = (a2 + b2) >> COL_SHIFT;
- col[8 * 5] = (a2 - b2) >> COL_SHIFT;
- col[8 * 3] = (a3 + b3) >> COL_SHIFT;
- col[8 * 4] = (a3 - b3) >> COL_SHIFT;
-}
-
-#else /* not ARCH_ALPHA */
-
-static inline void idctRowCondDC (int16_t * row)
-{
- int a0, a1, a2, a3, b0, b1, b2, b3;
-#ifdef FAST_64BIT
- uint64_t temp;
-#else
- uint32_t temp;
-#endif
-
-#ifdef FAST_64BIT
-#ifdef WORDS_BIGENDIAN
-#define ROW0_MASK 0xffff000000000000LL
-#else
-#define ROW0_MASK 0xffffLL
-#endif
- 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 (!(((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;
- }
-#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 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;
-}
-#endif /* not ARCH_ALPHA */
-
-static inline void idctSparseColPut (UINT8 *dest, int line_size,
- int16_t * col)
-{
- int a0, a1, a2, a3, b0, b1, b2, b3;
- UINT8 *cm = 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];
-}
-
-static inline void idctSparseColAdd (UINT8 *dest, int line_size,
- int16_t * col)
-{
- int a0, a1, a2, a3, b0, b1, b2, b3;
- UINT8 *cm = 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[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)];
-}
-
-static inline void idctSparseCol (int16_t * col)
-{
- 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 += + 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]);
- }
-
- 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);
-}
+#define BIT_DEPTH 8
+#include "simple_idct_template.c"
+#undef BIT_DEPTH
-
-#ifdef ARCH_ALPHA
-/* If all rows but the first one are zero after row transformation,
- all rows will be identical after column transformation. */
-static inline void idctCol2(int16_t *col)
-{
- int i;
- uint64_t l, r;
- uint64_t *lcol = (uint64_t *) col;
-
- for (i = 0; i < 8; ++i) {
- int a0 = col[0] + (1 << (COL_SHIFT - 1)) / W4;
-
- a0 *= W4;
- col[0] = a0 >> COL_SHIFT;
- ++col;
- }
-
- l = lcol[0];
- r = lcol[1];
- lcol[ 2] = l; lcol[ 3] = r;
- lcol[ 4] = l; lcol[ 5] = r;
- lcol[ 6] = l; lcol[ 7] = r;
- lcol[ 8] = l; lcol[ 9] = r;
- lcol[10] = l; lcol[11] = r;
- lcol[12] = l; lcol[13] = r;
- lcol[14] = l; lcol[15] = r;
-}
-
-void simple_idct (short *block)
-{
-
- int i;
- int rowsZero = 1; /* all rows except row 0 zero */
- int rowsConstant = 1; /* all rows consist of a constant value */
-
- for (i = 0; i < 8; i++) {
- int sparseness = idctRowCondDC(block + 8 * i);
-
- if (i > 0 && sparseness > 0)
- rowsZero = 0;
- if (sparseness == 2)
- rowsConstant = 0;
- }
-
- if (rowsZero) {
- idctCol2(block);
- } else if (rowsConstant) {
- uint64_t *lblock = (uint64_t *) block;
-
- idctSparseCol2(block);
- for (i = 0; i < 8; i++) {
- uint64_t v = (uint16_t) block[i * 8];
-
- v += v << 16;
- v += v << 32;
- lblock[0] = v;
- lblock[1] = v;
- lblock += 2;
- }
- } else {
- for (i = 0; i < 8; i++)
- idctSparseCol2(block + i);
- }
-}
-
-/* XXX: suppress this mess */
-void simple_idct_put(UINT8 *dest, int line_size, DCTELEM *block)
-{
- simple_idct(block);
- put_pixels_clamped(block, dest, line_size);
-}
-
-void simple_idct_add(UINT8 *dest, int line_size, DCTELEM *block)
-{
- simple_idct(block);
- add_pixels_clamped(block, dest, line_size);
-}
-
-#else
-
-void simple_idct_put(UINT8 *dest, int line_size, INT16 *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 *dest, int line_size, INT16 *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(INT16 *block)
-{
- int i;
- for(i=0; i<8; i++)
- idctRowCondDC(block + i*8);
-
- for(i=0; i<8; i++)
- idctSparseCol(block + i);
-}
-
-#endif
+#define BIT_DEPTH 10
+#include "simple_idct_template.c"
+#undef BIT_DEPTH
/* 2x4x8 idct */
#define CN_SHIFT 12
#define C_FIX(x) ((int)((x) * (1 << CN_SHIFT) + 0.5))
-#define C0 C_FIX(0.7071067811)
-#define C1 C_FIX(0.9238795324)
-#define C2 C_FIX(0.3826834324)
+#define C1 C_FIX(0.6532814824)
+#define C2 C_FIX(0.2705980501)
-/* row idct is multiple by 16 * sqrt(2.0), col idct4 is multiplied by
- sqrt(2). An extra division by two is needed for the first butterfly
- stage */
-#define C_SHIFT (4+1+12+1)
+/* 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(UINT8 *dest, int line_size, const INT16 *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 *cm = cropTbl + MAX_NEG_CROP;
a0 = col[8*0];
a1 = col[8*2];
a2 = col[8*4];
a3 = col[8*6];
- c0 = (a0 + a2) * C0 + (1 << (C_SHIFT - 1)) + (128 << C_SHIFT);
- c2 = (a0 - a2) * C0 + (1 << (C_SHIFT - 1)) + (128 << C_SHIFT);
+ 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[0] = av_clip_uint8((c0 + c1) >> C_SHIFT);
dest += line_size;
- dest[0] = cm[(c2 + c3) >> C_SHIFT];
+ dest[0] = av_clip_uint8((c2 + c3) >> C_SHIFT);
dest += line_size;
- dest[0] = cm[(c2 - c3) >> C_SHIFT];
+ dest[0] = av_clip_uint8((c2 - c3) >> C_SHIFT);
dest += line_size;
- dest[0] = cm[(c0 - c1) >> C_SHIFT];
+ dest[0] = av_clip_uint8((c0 - c1) >> C_SHIFT);
}
#define BF(k) \
/* 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 *dest, int line_size, INT16 *block)
+void ff_simple_idct248_put(uint8_t *dest, int line_size, DCTELEM *block)
{
int i;
- INT16 *ptr;
-
+ DCTELEM *ptr;
+
/* butterfly */
ptr = block;
for(i=0;i<4;i++) {
/* IDCT8 on each line */
for(i=0; i<8; i++) {
- idctRowCondDC(block + i*8);
+ idctRowCondDC_8(block + i*8, 0);
}
/* 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);
}
}
+
+/* 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;
+
+ 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] = av_clip_uint8(dest[0] + ((c0 + c1) >> C_SHIFT));
+ dest += line_size;
+ dest[0] = av_clip_uint8(dest[0] + ((c2 + c3) >> C_SHIFT));
+ dest += line_size;
+ dest[0] = av_clip_uint8(dest[0] + ((c2 - c3) >> C_SHIFT));
+ dest += line_size;
+ dest[0] = av_clip_uint8(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;
+
+ 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_8(block + i*8, 0);
+ }
+
+ /* 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_8(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);
+ }
+}
+
+void ff_prores_idct(DCTELEM *block, const int16_t *qmat)
+{
+ int i;
+
+ for (i = 0; i < 64; i++)
+ block[i] *= qmat[i];
+
+ for (i = 0; i < 8; i++)
+ idctRowCondDC_10(block + i*8, 2);
+
+ for (i = 0; i < 8; i++)
+ idctSparseCol_10(block + i);
+}
projects / ffmpeg / blobdiff