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FFmpeg/libavcodec/vc1dsp.c
Ronald S. Bultje c23acbaed4 Don't use ff_cropTbl[] for IDCT. 
Results of IDCT can by far outreach the range of ff_cropTbl[], leading
to overreads and potentially crashes.

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
2012-03-06 10:47:42 -08:00

854 lines
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/*
* VC-1 and WMV3 decoder - DSP functions
* Copyright (c) 2006 Konstantin Shishkov
*
* 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 2.1 of the License, or (at your option) any later version.
*
* 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 Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* VC-1 and WMV3 decoder
*
*/
#include "vc1dsp.h"
/** Apply overlap transform to horizontal edge
*/
static void vc1_v_overlap_c(uint8_t* src, int stride)
{
int i;
int a, b, c, d;
int d1, d2;
int rnd = 1;
for(i = 0; i < 8; i++) {
a = src[-2*stride];
b = src[-stride];
c = src[0];
d = src[stride];
d1 = (a - d + 3 + rnd) >> 3;
d2 = (a - d + b - c + 4 - rnd) >> 3;
src[-2*stride] = a - d1;
src[-stride] = av_clip_uint8(b - d2);
src[0] = av_clip_uint8(c + d2);
src[stride] = d + d1;
src++;
rnd = !rnd;
}
}
/** Apply overlap transform to vertical edge
*/
static void vc1_h_overlap_c(uint8_t* src, int stride)
{
int i;
int a, b, c, d;
int d1, d2;
int rnd = 1;
for(i = 0; i < 8; i++) {
a = src[-2];
b = src[-1];
c = src[0];
d = src[1];
d1 = (a - d + 3 + rnd) >> 3;
d2 = (a - d + b - c + 4 - rnd) >> 3;
src[-2] = a - d1;
src[-1] = av_clip_uint8(b - d2);
src[0] = av_clip_uint8(c + d2);
src[1] = d + d1;
src += stride;
rnd = !rnd;
}
}
static void vc1_v_s_overlap_c(DCTELEM *top, DCTELEM *bottom)
{
int i;
int a, b, c, d;
int d1, d2;
int rnd1 = 4, rnd2 = 3;
for(i = 0; i < 8; i++) {
a = top[48];
b = top[56];
c = bottom[0];
d = bottom[8];
d1 = a - d;
d2 = a - d + b - c;
top[48] = ((a << 3) - d1 + rnd1) >> 3;
top[56] = ((b << 3) - d2 + rnd2) >> 3;
bottom[0] = ((c << 3) + d2 + rnd1) >> 3;
bottom[8] = ((d << 3) + d1 + rnd2) >> 3;
bottom++;
top++;
rnd2 = 7 - rnd2;
rnd1 = 7 - rnd1;
}
}
static void vc1_h_s_overlap_c(DCTELEM *left, DCTELEM *right)
{
int i;
int a, b, c, d;
int d1, d2;
int rnd1 = 4, rnd2 = 3;
for(i = 0; i < 8; i++) {
a = left[6];
b = left[7];
c = right[0];
d = right[1];
d1 = a - d;
d2 = a - d + b - c;
left[6] = ((a << 3) - d1 + rnd1) >> 3;
left[7] = ((b << 3) - d2 + rnd2) >> 3;
right[0] = ((c << 3) + d2 + rnd1) >> 3;
right[1] = ((d << 3) + d1 + rnd2) >> 3;
right += 8;
left += 8;
rnd2 = 7 - rnd2;
rnd1 = 7 - rnd1;
}
}
/**
* VC-1 in-loop deblocking filter for one line
* @param src source block type
* @param stride block stride
* @param pq block quantizer
* @return whether other 3 pairs should be filtered or not
* @see 8.6
*/
static av_always_inline int vc1_filter_line(uint8_t* src, int stride, int pq){
int a0 = (2*(src[-2*stride] - src[ 1*stride]) - 5*(src[-1*stride] - src[ 0*stride]) + 4) >> 3;
int a0_sign = a0 >> 31; /* Store sign */
a0 = (a0 ^ a0_sign) - a0_sign; /* a0 = FFABS(a0); */
if(a0 < pq){
int a1 = FFABS((2*(src[-4*stride] - src[-1*stride]) - 5*(src[-3*stride] - src[-2*stride]) + 4) >> 3);
int a2 = FFABS((2*(src[ 0*stride] - src[ 3*stride]) - 5*(src[ 1*stride] - src[ 2*stride]) + 4) >> 3);
if(a1 < a0 || a2 < a0){
int clip = src[-1*stride] - src[ 0*stride];
int clip_sign = clip >> 31;
clip = ((clip ^ clip_sign) - clip_sign)>>1;
if(clip){
int a3 = FFMIN(a1, a2);
int d = 5 * (a3 - a0);
int d_sign = (d >> 31);
d = ((d ^ d_sign) - d_sign) >> 3;
d_sign ^= a0_sign;
if( d_sign ^ clip_sign )
d = 0;
else{
d = FFMIN(d, clip);
d = (d ^ d_sign) - d_sign; /* Restore sign */
src[-1*stride] = av_clip_uint8(src[-1*stride] - d);
src[ 0*stride] = av_clip_uint8(src[ 0*stride] + d);
}
return 1;
}
}
}
return 0;
}
/**
* VC-1 in-loop deblocking filter
* @param src source block type
* @param step distance between horizontally adjacent elements
* @param stride distance between vertically adjacent elements
* @param len edge length to filter (4 or 8 pixels)
* @param pq block quantizer
* @see 8.6
*/
static inline void vc1_loop_filter(uint8_t* src, int step, int stride, int len, int pq)
{
int i;
int filt3;
for(i = 0; i < len; i += 4){
filt3 = vc1_filter_line(src + 2*step, stride, pq);
if(filt3){
vc1_filter_line(src + 0*step, stride, pq);
vc1_filter_line(src + 1*step, stride, pq);
vc1_filter_line(src + 3*step, stride, pq);
}
src += step * 4;
}
}
static void vc1_v_loop_filter4_c(uint8_t *src, int stride, int pq)
{
vc1_loop_filter(src, 1, stride, 4, pq);
}
static void vc1_h_loop_filter4_c(uint8_t *src, int stride, int pq)
{
vc1_loop_filter(src, stride, 1, 4, pq);
}
static void vc1_v_loop_filter8_c(uint8_t *src, int stride, int pq)
{
vc1_loop_filter(src, 1, stride, 8, pq);
}
static void vc1_h_loop_filter8_c(uint8_t *src, int stride, int pq)
{
vc1_loop_filter(src, stride, 1, 8, pq);
}
static void vc1_v_loop_filter16_c(uint8_t *src, int stride, int pq)
{
vc1_loop_filter(src, 1, stride, 16, pq);
}
static void vc1_h_loop_filter16_c(uint8_t *src, int stride, int pq)
{
vc1_loop_filter(src, stride, 1, 16, pq);
}
/** Do inverse transform on 8x8 block
*/
static void vc1_inv_trans_8x8_dc_c(uint8_t *dest, int linesize, DCTELEM *block)
{
int i;
int dc = block[0];
dc = (3 * dc + 1) >> 1;
dc = (3 * dc + 16) >> 5;
for(i = 0; i < 8; i++){
dest[0] = av_clip_uint8(dest[0] + dc);
dest[1] = av_clip_uint8(dest[1] + dc);
dest[2] = av_clip_uint8(dest[2] + dc);
dest[3] = av_clip_uint8(dest[3] + dc);
dest[4] = av_clip_uint8(dest[4] + dc);
dest[5] = av_clip_uint8(dest[5] + dc);
dest[6] = av_clip_uint8(dest[6] + dc);
dest[7] = av_clip_uint8(dest[7] + dc);
dest += linesize;
}
}
static void vc1_inv_trans_8x8_c(DCTELEM block[64])
{
int i;
register int t1,t2,t3,t4,t5,t6,t7,t8;
DCTELEM *src, *dst, temp[64];
src = block;
dst = temp;
for(i = 0; i < 8; i++){
t1 = 12 * (src[ 0] + src[32]) + 4;
t2 = 12 * (src[ 0] - src[32]) + 4;
t3 = 16 * src[16] + 6 * src[48];
t4 = 6 * src[16] - 16 * src[48];
t5 = t1 + t3;
t6 = t2 + t4;
t7 = t2 - t4;
t8 = t1 - t3;
t1 = 16 * src[ 8] + 15 * src[24] + 9 * src[40] + 4 * src[56];
t2 = 15 * src[ 8] - 4 * src[24] - 16 * src[40] - 9 * src[56];
t3 = 9 * src[ 8] - 16 * src[24] + 4 * src[40] + 15 * src[56];
t4 = 4 * src[ 8] - 9 * src[24] + 15 * src[40] - 16 * src[56];
dst[0] = (t5 + t1) >> 3;
dst[1] = (t6 + t2) >> 3;
dst[2] = (t7 + t3) >> 3;
dst[3] = (t8 + t4) >> 3;
dst[4] = (t8 - t4) >> 3;
dst[5] = (t7 - t3) >> 3;
dst[6] = (t6 - t2) >> 3;
dst[7] = (t5 - t1) >> 3;
src += 1;
dst += 8;
}
src = temp;
dst = block;
for(i = 0; i < 8; i++){
t1 = 12 * (src[ 0] + src[32]) + 64;
t2 = 12 * (src[ 0] - src[32]) + 64;
t3 = 16 * src[16] + 6 * src[48];
t4 = 6 * src[16] - 16 * src[48];
t5 = t1 + t3;
t6 = t2 + t4;
t7 = t2 - t4;
t8 = t1 - t3;
t1 = 16 * src[ 8] + 15 * src[24] + 9 * src[40] + 4 * src[56];
t2 = 15 * src[ 8] - 4 * src[24] - 16 * src[40] - 9 * src[56];
t3 = 9 * src[ 8] - 16 * src[24] + 4 * src[40] + 15 * src[56];
t4 = 4 * src[ 8] - 9 * src[24] + 15 * src[40] - 16 * src[56];
dst[ 0] = (t5 + t1) >> 7;
dst[ 8] = (t6 + t2) >> 7;
dst[16] = (t7 + t3) >> 7;
dst[24] = (t8 + t4) >> 7;
dst[32] = (t8 - t4 + 1) >> 7;
dst[40] = (t7 - t3 + 1) >> 7;
dst[48] = (t6 - t2 + 1) >> 7;
dst[56] = (t5 - t1 + 1) >> 7;
src++;
dst++;
}
}
/** Do inverse transform on 8x4 part of block
*/
static void vc1_inv_trans_8x4_dc_c(uint8_t *dest, int linesize, DCTELEM *block)
{
int i;
int dc = block[0];
dc = ( 3 * dc + 1) >> 1;
dc = (17 * dc + 64) >> 7;
for(i = 0; i < 4; i++){
dest[0] = av_clip_uint8(dest[0] + dc);
dest[1] = av_clip_uint8(dest[1] + dc);
dest[2] = av_clip_uint8(dest[2] + dc);
dest[3] = av_clip_uint8(dest[3] + dc);
dest[4] = av_clip_uint8(dest[4] + dc);
dest[5] = av_clip_uint8(dest[5] + dc);
dest[6] = av_clip_uint8(dest[6] + dc);
dest[7] = av_clip_uint8(dest[7] + dc);
dest += linesize;
}
}
static void vc1_inv_trans_8x4_c(uint8_t *dest, int linesize, DCTELEM *block)
{
int i;
register int t1,t2,t3,t4,t5,t6,t7,t8;
DCTELEM *src, *dst;
src = block;
dst = block;
for(i = 0; i < 4; i++){
t1 = 12 * (src[0] + src[4]) + 4;
t2 = 12 * (src[0] - src[4]) + 4;
t3 = 16 * src[2] + 6 * src[6];
t4 = 6 * src[2] - 16 * src[6];
t5 = t1 + t3;
t6 = t2 + t4;
t7 = t2 - t4;
t8 = t1 - t3;
t1 = 16 * src[1] + 15 * src[3] + 9 * src[5] + 4 * src[7];
t2 = 15 * src[1] - 4 * src[3] - 16 * src[5] - 9 * src[7];
t3 = 9 * src[1] - 16 * src[3] + 4 * src[5] + 15 * src[7];
t4 = 4 * src[1] - 9 * src[3] + 15 * src[5] - 16 * src[7];
dst[0] = (t5 + t1) >> 3;
dst[1] = (t6 + t2) >> 3;
dst[2] = (t7 + t3) >> 3;
dst[3] = (t8 + t4) >> 3;
dst[4] = (t8 - t4) >> 3;
dst[5] = (t7 - t3) >> 3;
dst[6] = (t6 - t2) >> 3;
dst[7] = (t5 - t1) >> 3;
src += 8;
dst += 8;
}
src = block;
for(i = 0; i < 8; i++){
t1 = 17 * (src[ 0] + src[16]) + 64;
t2 = 17 * (src[ 0] - src[16]) + 64;
t3 = 22 * src[ 8] + 10 * src[24];
t4 = 22 * src[24] - 10 * src[ 8];
dest[0*linesize] = av_clip_uint8(dest[0*linesize] + ((t1 + t3) >> 7));
dest[1*linesize] = av_clip_uint8(dest[1*linesize] + ((t2 - t4) >> 7));
dest[2*linesize] = av_clip_uint8(dest[2*linesize] + ((t2 + t4) >> 7));
dest[3*linesize] = av_clip_uint8(dest[3*linesize] + ((t1 - t3) >> 7));
src ++;
dest++;
}
}
/** Do inverse transform on 4x8 parts of block
*/
static void vc1_inv_trans_4x8_dc_c(uint8_t *dest, int linesize, DCTELEM *block)
{
int i;
int dc = block[0];
dc = (17 * dc + 4) >> 3;
dc = (12 * dc + 64) >> 7;
for(i = 0; i < 8; i++){
dest[0] = av_clip_uint8(dest[0] + dc);
dest[1] = av_clip_uint8(dest[1] + dc);
dest[2] = av_clip_uint8(dest[2] + dc);
dest[3] = av_clip_uint8(dest[3] + dc);
dest += linesize;
}
}
static void vc1_inv_trans_4x8_c(uint8_t *dest, int linesize, DCTELEM *block)
{
int i;
register int t1,t2,t3,t4,t5,t6,t7,t8;
DCTELEM *src, *dst;
src = block;
dst = block;
for(i = 0; i < 8; i++){
t1 = 17 * (src[0] + src[2]) + 4;
t2 = 17 * (src[0] - src[2]) + 4;
t3 = 22 * src[1] + 10 * src[3];
t4 = 22 * src[3] - 10 * src[1];
dst[0] = (t1 + t3) >> 3;
dst[1] = (t2 - t4) >> 3;
dst[2] = (t2 + t4) >> 3;
dst[3] = (t1 - t3) >> 3;
src += 8;
dst += 8;
}
src = block;
for(i = 0; i < 4; i++){
t1 = 12 * (src[ 0] + src[32]) + 64;
t2 = 12 * (src[ 0] - src[32]) + 64;
t3 = 16 * src[16] + 6 * src[48];
t4 = 6 * src[16] - 16 * src[48];
t5 = t1 + t3;
t6 = t2 + t4;
t7 = t2 - t4;
t8 = t1 - t3;
t1 = 16 * src[ 8] + 15 * src[24] + 9 * src[40] + 4 * src[56];
t2 = 15 * src[ 8] - 4 * src[24] - 16 * src[40] - 9 * src[56];
t3 = 9 * src[ 8] - 16 * src[24] + 4 * src[40] + 15 * src[56];
t4 = 4 * src[ 8] - 9 * src[24] + 15 * src[40] - 16 * src[56];
dest[0*linesize] = av_clip_uint8(dest[0*linesize] + ((t5 + t1) >> 7));
dest[1*linesize] = av_clip_uint8(dest[1*linesize] + ((t6 + t2) >> 7));
dest[2*linesize] = av_clip_uint8(dest[2*linesize] + ((t7 + t3) >> 7));
dest[3*linesize] = av_clip_uint8(dest[3*linesize] + ((t8 + t4) >> 7));
dest[4*linesize] = av_clip_uint8(dest[4*linesize] + ((t8 - t4 + 1) >> 7));
dest[5*linesize] = av_clip_uint8(dest[5*linesize] + ((t7 - t3 + 1) >> 7));
dest[6*linesize] = av_clip_uint8(dest[6*linesize] + ((t6 - t2 + 1) >> 7));
dest[7*linesize] = av_clip_uint8(dest[7*linesize] + ((t5 - t1 + 1) >> 7));
src ++;
dest++;
}
}
/** Do inverse transform on 4x4 part of block
*/
static void vc1_inv_trans_4x4_dc_c(uint8_t *dest, int linesize, DCTELEM *block)
{
int i;
int dc = block[0];
dc = (17 * dc + 4) >> 3;
dc = (17 * dc + 64) >> 7;
for(i = 0; i < 4; i++){
dest[0] = av_clip_uint8(dest[0] + dc);
dest[1] = av_clip_uint8(dest[1] + dc);
dest[2] = av_clip_uint8(dest[2] + dc);
dest[3] = av_clip_uint8(dest[3] + dc);
dest += linesize;
}
}
static void vc1_inv_trans_4x4_c(uint8_t *dest, int linesize, DCTELEM *block)
{
int i;
register int t1,t2,t3,t4;
DCTELEM *src, *dst;
src = block;
dst = block;
for(i = 0; i < 4; i++){
t1 = 17 * (src[0] + src[2]) + 4;
t2 = 17 * (src[0] - src[2]) + 4;
t3 = 22 * src[1] + 10 * src[3];
t4 = 22 * src[3] - 10 * src[1];
dst[0] = (t1 + t3) >> 3;
dst[1] = (t2 - t4) >> 3;
dst[2] = (t2 + t4) >> 3;
dst[3] = (t1 - t3) >> 3;
src += 8;
dst += 8;
}
src = block;
for(i = 0; i < 4; i++){
t1 = 17 * (src[ 0] + src[16]) + 64;
t2 = 17 * (src[ 0] - src[16]) + 64;
t3 = 22 * src[ 8] + 10 * src[24];
t4 = 22 * src[24] - 10 * src[ 8];
dest[0*linesize] = av_clip_uint8(dest[0*linesize] + ((t1 + t3) >> 7));
dest[1*linesize] = av_clip_uint8(dest[1*linesize] + ((t2 - t4) >> 7));
dest[2*linesize] = av_clip_uint8(dest[2*linesize] + ((t2 + t4) >> 7));
dest[3*linesize] = av_clip_uint8(dest[3*linesize] + ((t1 - t3) >> 7));
src ++;
dest++;
}
}
/* motion compensation functions */
/** Filter in case of 2 filters */
#define VC1_MSPEL_FILTER_16B(DIR, TYPE) \
static av_always_inline int vc1_mspel_ ## DIR ## _filter_16bits(const TYPE *src, int stride, int mode) \
{ \
switch(mode){ \
case 0: /* no shift - should not occur */ \
return 0; \
case 1: /* 1/4 shift */ \
return -4*src[-stride] + 53*src[0] + 18*src[stride] - 3*src[stride*2]; \
case 2: /* 1/2 shift */ \
return -src[-stride] + 9*src[0] + 9*src[stride] - src[stride*2]; \
case 3: /* 3/4 shift */ \
return -3*src[-stride] + 18*src[0] + 53*src[stride] - 4*src[stride*2]; \
} \
return 0; /* should not occur */ \
}
VC1_MSPEL_FILTER_16B(ver, uint8_t)
VC1_MSPEL_FILTER_16B(hor, int16_t)
/** Filter used to interpolate fractional pel values
*/
static av_always_inline int vc1_mspel_filter(const uint8_t *src, int stride, int mode, int r)
{
switch(mode){
case 0: //no shift
return src[0];
case 1: // 1/4 shift
return (-4*src[-stride] + 53*src[0] + 18*src[stride] - 3*src[stride*2] + 32 - r) >> 6;
case 2: // 1/2 shift
return (-src[-stride] + 9*src[0] + 9*src[stride] - src[stride*2] + 8 - r) >> 4;
case 3: // 3/4 shift
return (-3*src[-stride] + 18*src[0] + 53*src[stride] - 4*src[stride*2] + 32 - r) >> 6;
}
return 0; //should not occur
}
/** Function used to do motion compensation with bicubic interpolation
*/
#define VC1_MSPEL_MC(OP, OPNAME)\
static void OPNAME ## vc1_mspel_mc(uint8_t *dst, const uint8_t *src, int stride, int hmode, int vmode, int rnd)\
{\
int i, j;\
\
if (vmode) { /* Horizontal filter to apply */\
int r;\
\
if (hmode) { /* Vertical filter to apply, output to tmp */\
static const int shift_value[] = { 0, 5, 1, 5 };\
int shift = (shift_value[hmode]+shift_value[vmode])>>1;\
int16_t tmp[11*8], *tptr = tmp;\
\
r = (1<<(shift-1)) + rnd-1;\
\
src -= 1;\
for(j = 0; j < 8; j++) {\
for(i = 0; i < 11; i++)\
tptr[i] = (vc1_mspel_ver_filter_16bits(src + i, stride, vmode)+r)>>shift;\
src += stride;\
tptr += 11;\
}\
\
r = 64-rnd;\
tptr = tmp+1;\
for(j = 0; j < 8; j++) {\
for(i = 0; i < 8; i++)\
OP(dst[i], (vc1_mspel_hor_filter_16bits(tptr + i, 1, hmode)+r)>>7);\
dst += stride;\
tptr += 11;\
}\
\
return;\
}\
else { /* No horizontal filter, output 8 lines to dst */\
r = 1-rnd;\
\
for(j = 0; j < 8; j++) {\
for(i = 0; i < 8; i++)\
OP(dst[i], vc1_mspel_filter(src + i, stride, vmode, r));\
src += stride;\
dst += stride;\
}\
return;\
}\
}\
\
/* Horizontal mode with no vertical mode */\
for(j = 0; j < 8; j++) {\
for(i = 0; i < 8; i++)\
OP(dst[i], vc1_mspel_filter(src + i, 1, hmode, rnd));\
dst += stride;\
src += stride;\
}\
}
#define op_put(a, b) a = av_clip_uint8(b)
#define op_avg(a, b) a = (a + av_clip_uint8(b) + 1) >> 1
VC1_MSPEL_MC(op_put, put_)
VC1_MSPEL_MC(op_avg, avg_)
/* pixel functions - really are entry points to vc1_mspel_mc */
#define PUT_VC1_MSPEL(a, b)\
static void put_vc1_mspel_mc ## a ## b ##_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) { \
put_vc1_mspel_mc(dst, src, stride, a, b, rnd); \
}\
static void avg_vc1_mspel_mc ## a ## b ##_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) { \
avg_vc1_mspel_mc(dst, src, stride, a, b, rnd); \
}
PUT_VC1_MSPEL(1, 0)
PUT_VC1_MSPEL(2, 0)
PUT_VC1_MSPEL(3, 0)
PUT_VC1_MSPEL(0, 1)
PUT_VC1_MSPEL(1, 1)
PUT_VC1_MSPEL(2, 1)
PUT_VC1_MSPEL(3, 1)
PUT_VC1_MSPEL(0, 2)
PUT_VC1_MSPEL(1, 2)
PUT_VC1_MSPEL(2, 2)
PUT_VC1_MSPEL(3, 2)
PUT_VC1_MSPEL(0, 3)
PUT_VC1_MSPEL(1, 3)
PUT_VC1_MSPEL(2, 3)
PUT_VC1_MSPEL(3, 3)
static void put_no_rnd_vc1_chroma_mc8_c(uint8_t *dst/*align 8*/, uint8_t *src/*align 1*/, int stride, int h, int x, int y){
const int A=(8-x)*(8-y);
const int B=( x)*(8-y);
const int C=(8-x)*( y);
const int D=( x)*( y);
int i;
assert(x<8 && y<8 && x>=0 && y>=0);
for(i=0; i<h; i++)
{
dst[0] = (A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1] + 32 - 4) >> 6;
dst[1] = (A*src[1] + B*src[2] + C*src[stride+1] + D*src[stride+2] + 32 - 4) >> 6;
dst[2] = (A*src[2] + B*src[3] + C*src[stride+2] + D*src[stride+3] + 32 - 4) >> 6;
dst[3] = (A*src[3] + B*src[4] + C*src[stride+3] + D*src[stride+4] + 32 - 4) >> 6;
dst[4] = (A*src[4] + B*src[5] + C*src[stride+4] + D*src[stride+5] + 32 - 4) >> 6;
dst[5] = (A*src[5] + B*src[6] + C*src[stride+5] + D*src[stride+6] + 32 - 4) >> 6;
dst[6] = (A*src[6] + B*src[7] + C*src[stride+6] + D*src[stride+7] + 32 - 4) >> 6;
dst[7] = (A*src[7] + B*src[8] + C*src[stride+7] + D*src[stride+8] + 32 - 4) >> 6;
dst+= stride;
src+= stride;
}
}
static void put_no_rnd_vc1_chroma_mc4_c(uint8_t *dst, uint8_t *src, int stride, int h, int x, int y){
const int A=(8-x)*(8-y);
const int B=( x)*(8-y);
const int C=(8-x)*( y);
const int D=( x)*( y);
int i;
assert(x<8 && y<8 && x>=0 && y>=0);
for(i=0; i<h; i++)
{
dst[0] = (A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1] + 32 - 4) >> 6;
dst[1] = (A*src[1] + B*src[2] + C*src[stride+1] + D*src[stride+2] + 32 - 4) >> 6;
dst[2] = (A*src[2] + B*src[3] + C*src[stride+2] + D*src[stride+3] + 32 - 4) >> 6;
dst[3] = (A*src[3] + B*src[4] + C*src[stride+3] + D*src[stride+4] + 32 - 4) >> 6;
dst+= stride;
src+= stride;
}
}
#define avg2(a,b) ((a+b+1)>>1)
static void avg_no_rnd_vc1_chroma_mc8_c(uint8_t *dst/*align 8*/, uint8_t *src/*align 1*/, int stride, int h, int x, int y){
const int A=(8-x)*(8-y);
const int B=( x)*(8-y);
const int C=(8-x)*( y);
const int D=( x)*( y);
int i;
assert(x<8 && y<8 && x>=0 && y>=0);
for(i=0; i<h; i++)
{
dst[0] = avg2(dst[0], ((A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1] + 32 - 4) >> 6));
dst[1] = avg2(dst[1], ((A*src[1] + B*src[2] + C*src[stride+1] + D*src[stride+2] + 32 - 4) >> 6));
dst[2] = avg2(dst[2], ((A*src[2] + B*src[3] + C*src[stride+2] + D*src[stride+3] + 32 - 4) >> 6));
dst[3] = avg2(dst[3], ((A*src[3] + B*src[4] + C*src[stride+3] + D*src[stride+4] + 32 - 4) >> 6));
dst[4] = avg2(dst[4], ((A*src[4] + B*src[5] + C*src[stride+4] + D*src[stride+5] + 32 - 4) >> 6));
dst[5] = avg2(dst[5], ((A*src[5] + B*src[6] + C*src[stride+5] + D*src[stride+6] + 32 - 4) >> 6));
dst[6] = avg2(dst[6], ((A*src[6] + B*src[7] + C*src[stride+6] + D*src[stride+7] + 32 - 4) >> 6));
dst[7] = avg2(dst[7], ((A*src[7] + B*src[8] + C*src[stride+7] + D*src[stride+8] + 32 - 4) >> 6));
dst+= stride;
src+= stride;
}
}
#if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER
static void sprite_h_c(uint8_t *dst, const uint8_t *src, int offset, int advance, int count)
{
while (count--) {
int a = src[(offset >> 16) ];
int b = src[(offset >> 16) + 1];
*dst++ = a + ((b - a) * (offset&0xFFFF) >> 16);
offset += advance;
}
}
static av_always_inline void sprite_v_template(uint8_t *dst, const uint8_t *src1a, const uint8_t *src1b, int offset1,
int two_sprites, const uint8_t *src2a, const uint8_t *src2b, int offset2,
int alpha, int scaled, int width)
{
int a1, b1, a2, b2;
while (width--) {
a1 = *src1a++;
if (scaled) {
b1 = *src1b++;
a1 = a1 + ((b1 - a1) * offset1 >> 16);
}
if (two_sprites) {
a2 = *src2a++;
if (scaled > 1) {
b2 = *src2b++;
a2 = a2 + ((b2 - a2) * offset2 >> 16);
}
a1 = a1 + ((a2 - a1) * alpha >> 16);
}
*dst++ = a1;
}
}
static void sprite_v_single_c(uint8_t *dst, const uint8_t *src1a, const uint8_t *src1b, int offset, int width)
{
sprite_v_template(dst, src1a, src1b, offset, 0, NULL, NULL, 0, 0, 1, width);
}
static void sprite_v_double_noscale_c(uint8_t *dst, const uint8_t *src1a, const uint8_t *src2a, int alpha, int width)
{
sprite_v_template(dst, src1a, NULL, 0, 1, src2a, NULL, 0, alpha, 0, width);
}
static void sprite_v_double_onescale_c(uint8_t *dst, const uint8_t *src1a, const uint8_t *src1b, int offset1,
const uint8_t *src2a, int alpha, int width)
{
sprite_v_template(dst, src1a, src1b, offset1, 1, src2a, NULL, 0, alpha, 1, width);
}
static void sprite_v_double_twoscale_c(uint8_t *dst, const uint8_t *src1a, const uint8_t *src1b, int offset1,
const uint8_t *src2a, const uint8_t *src2b, int offset2,
int alpha, int width)
{
sprite_v_template(dst, src1a, src1b, offset1, 1, src2a, src2b, offset2, alpha, 2, width);
}
#endif
av_cold void ff_vc1dsp_init(VC1DSPContext* dsp) {
dsp->vc1_inv_trans_8x8 = vc1_inv_trans_8x8_c;
dsp->vc1_inv_trans_4x8 = vc1_inv_trans_4x8_c;
dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_c;
dsp->vc1_inv_trans_4x4 = vc1_inv_trans_4x4_c;
dsp->vc1_inv_trans_8x8_dc = vc1_inv_trans_8x8_dc_c;
dsp->vc1_inv_trans_4x8_dc = vc1_inv_trans_4x8_dc_c;
dsp->vc1_inv_trans_8x4_dc = vc1_inv_trans_8x4_dc_c;
dsp->vc1_inv_trans_4x4_dc = vc1_inv_trans_4x4_dc_c;
dsp->vc1_h_overlap = vc1_h_overlap_c;
dsp->vc1_v_overlap = vc1_v_overlap_c;
dsp->vc1_h_s_overlap = vc1_h_s_overlap_c;
dsp->vc1_v_s_overlap = vc1_v_s_overlap_c;
dsp->vc1_v_loop_filter4 = vc1_v_loop_filter4_c;
dsp->vc1_h_loop_filter4 = vc1_h_loop_filter4_c;
dsp->vc1_v_loop_filter8 = vc1_v_loop_filter8_c;
dsp->vc1_h_loop_filter8 = vc1_h_loop_filter8_c;
dsp->vc1_v_loop_filter16 = vc1_v_loop_filter16_c;
dsp->vc1_h_loop_filter16 = vc1_h_loop_filter16_c;
dsp->put_vc1_mspel_pixels_tab[ 0] = ff_put_pixels8x8_c;
dsp->put_vc1_mspel_pixels_tab[ 1] = put_vc1_mspel_mc10_c;
dsp->put_vc1_mspel_pixels_tab[ 2] = put_vc1_mspel_mc20_c;
dsp->put_vc1_mspel_pixels_tab[ 3] = put_vc1_mspel_mc30_c;
dsp->put_vc1_mspel_pixels_tab[ 4] = put_vc1_mspel_mc01_c;
dsp->put_vc1_mspel_pixels_tab[ 5] = put_vc1_mspel_mc11_c;
dsp->put_vc1_mspel_pixels_tab[ 6] = put_vc1_mspel_mc21_c;
dsp->put_vc1_mspel_pixels_tab[ 7] = put_vc1_mspel_mc31_c;
dsp->put_vc1_mspel_pixels_tab[ 8] = put_vc1_mspel_mc02_c;
dsp->put_vc1_mspel_pixels_tab[ 9] = put_vc1_mspel_mc12_c;
dsp->put_vc1_mspel_pixels_tab[10] = put_vc1_mspel_mc22_c;
dsp->put_vc1_mspel_pixels_tab[11] = put_vc1_mspel_mc32_c;
dsp->put_vc1_mspel_pixels_tab[12] = put_vc1_mspel_mc03_c;
dsp->put_vc1_mspel_pixels_tab[13] = put_vc1_mspel_mc13_c;
dsp->put_vc1_mspel_pixels_tab[14] = put_vc1_mspel_mc23_c;
dsp->put_vc1_mspel_pixels_tab[15] = put_vc1_mspel_mc33_c;
dsp->avg_vc1_mspel_pixels_tab[ 0] = ff_avg_pixels8x8_c;
dsp->avg_vc1_mspel_pixels_tab[ 1] = avg_vc1_mspel_mc10_c;
dsp->avg_vc1_mspel_pixels_tab[ 2] = avg_vc1_mspel_mc20_c;
dsp->avg_vc1_mspel_pixels_tab[ 3] = avg_vc1_mspel_mc30_c;
dsp->avg_vc1_mspel_pixels_tab[ 4] = avg_vc1_mspel_mc01_c;
dsp->avg_vc1_mspel_pixels_tab[ 5] = avg_vc1_mspel_mc11_c;
dsp->avg_vc1_mspel_pixels_tab[ 6] = avg_vc1_mspel_mc21_c;
dsp->avg_vc1_mspel_pixels_tab[ 7] = avg_vc1_mspel_mc31_c;
dsp->avg_vc1_mspel_pixels_tab[ 8] = avg_vc1_mspel_mc02_c;
dsp->avg_vc1_mspel_pixels_tab[ 9] = avg_vc1_mspel_mc12_c;
dsp->avg_vc1_mspel_pixels_tab[10] = avg_vc1_mspel_mc22_c;
dsp->avg_vc1_mspel_pixels_tab[11] = avg_vc1_mspel_mc32_c;
dsp->avg_vc1_mspel_pixels_tab[12] = avg_vc1_mspel_mc03_c;
dsp->avg_vc1_mspel_pixels_tab[13] = avg_vc1_mspel_mc13_c;
dsp->avg_vc1_mspel_pixels_tab[14] = avg_vc1_mspel_mc23_c;
dsp->avg_vc1_mspel_pixels_tab[15] = avg_vc1_mspel_mc33_c;
dsp->put_no_rnd_vc1_chroma_pixels_tab[0]= put_no_rnd_vc1_chroma_mc8_c;
dsp->avg_no_rnd_vc1_chroma_pixels_tab[0]= avg_no_rnd_vc1_chroma_mc8_c;
dsp->put_no_rnd_vc1_chroma_pixels_tab[1] = put_no_rnd_vc1_chroma_mc4_c;
#if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER
dsp->sprite_h = sprite_h_c;
dsp->sprite_v_single = sprite_v_single_c;
dsp->sprite_v_double_noscale = sprite_v_double_noscale_c;
dsp->sprite_v_double_onescale = sprite_v_double_onescale_c;
dsp->sprite_v_double_twoscale = sprite_v_double_twoscale_c;
#endif
if (HAVE_ALTIVEC)
ff_vc1dsp_init_altivec(dsp);
if (HAVE_MMX)
ff_vc1dsp_init_mmx(dsp);
}
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