mirror of
https://github.com/WinampDesktop/winamp.git
synced 2024-12-11 14:11:00 -05:00
343 lines
9.1 KiB
C++
343 lines
9.1 KiB
C++
#include "Decoder.h"
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#define sign(a) ((a) < 0 ? -1 : 1)
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/* private prototypes */
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static void recon_comp (unsigned char *src, unsigned char *dst,
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int lx, int lx2, int w, int h, int x, int y, int dx, int dy);
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static void rec(unsigned char *s, unsigned char *d, int lx, int lx2, int h);
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static void recc(unsigned char *s, unsigned char *d, int lx, int lx2, int h);
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static void rech(unsigned char *s, unsigned char *d, int lx, int lx2, int h);
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static void rechc(unsigned char *s, unsigned char *d, int lx, int lx2, int h);
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static void h263_recv(unsigned char *s, unsigned char *d, int lx, int lx2, int h);
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static void recvc(unsigned char *s, unsigned char *d, int lx, int lx2, int h);
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static void rec4(unsigned char *s, unsigned char *d, int lx, int lx2, int h);
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static void rec4c(unsigned char *s, unsigned char *d, int lx, int lx2, int h);
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static int roundtab[16]= {0,0,0,1,1,1,1,1,1,1,1,1,1,1,2,2};
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void Decoder::reconstruct(int bx, int by, int mode)
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{
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int w, h, lx, lx2, dx, dy, xp, yp, comp, sum;
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int x, y;
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unsigned char *src[3];
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x = bx / 16 + 1;
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y = by / 16 + 1;
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lx = coded_picture_width;
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lx2 = coded_picture_width + 64;
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src[0] = edgeframe[0];
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src[1] = edgeframe[1];
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src[2] = edgeframe[2];
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/* P prediction */
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w = 8;
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h = 8;
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/* Y */
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/* 4 MV can be used without OBMC in * deblocking filter mode */
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if (mode == MODE_INTER4V || mode == MODE_INTER4V_Q)
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{
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for (comp = 0; comp < 4; comp++)
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{
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dx = MV[0][comp + 1][y][x];
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dy = MV[1][comp + 1][y][x];
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xp = bx + ((comp & 1) << 3);
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yp = by + ((comp & 2) << 2);
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recon_comp(src[0], newframe[0], lx, lx2, w, h, xp, yp, dx, dy);
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}
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}
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else
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{
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dx = MV[0][0][y][x];
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dy = MV[1][0][y][x];
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recon_comp(src[0], newframe[0], lx, lx2, w << 1, h << 1, bx, by, dx, dy);
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// TODO: MC16x16
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}
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/* Chroma */
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if (mode == MODE_INTER4V || mode == MODE_INTER4V_Q)
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{
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sum = MV[0][1][y][x] + MV[0][2][y][x] + MV[0][3][y][x] + MV[0][4][y][x];
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dx = sign(sum) * (roundtab[abs(sum) % 16] + (abs(sum) / 16) * 2);
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sum = MV[1][1][y][x] + MV[1][2][y][x] + MV[1][3][y][x] + MV[1][4][y][x];
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dy = sign(sum) * (roundtab[abs(sum) % 16] + (abs(sum) / 16) * 2);
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}
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else
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{
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dx = MV[0][0][y][x];
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dy = MV[1][0][y][x];
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/* chroma rounding */
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dx = (dx % 4 == 0 ? dx >> 1 : (dx >> 1) | 1);
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dy = (dy % 4 == 0 ? dy >> 1 : (dy >> 1) | 1);
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}
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lx >>= 1;
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bx >>= 1;
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lx2 >>= 1;
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by >>= 1;
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/* Chroma */
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recon_comp(src[1], newframe[1], lx, lx2, w, h, bx, by, dx, dy);
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recon_comp(src[2], newframe[2], lx, lx2, w, h, bx, by, dx, dy);
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}
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static void recon_comp(unsigned char *src,unsigned char *dst,int lx,int lx2,int w,int h,int x,int y,int dx,int dy)
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{
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int xint, xh, yint, yh;
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unsigned char *s, *d;
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xint = dx>>1;
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xh = dx & 1;
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yint = dy>>1;
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yh = dy & 1;
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/* origins */
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s = src + lx2*(y+yint) + x + xint;
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d = dst + lx*y + x;
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if (!xh && !yh)
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if (w!=8)
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rec(s,d,lx,lx2,h);
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else
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recc(s,d,lx,lx2,h);
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else if (!xh && yh)
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if (w!=8)
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h263_recv(s,d,lx,lx2,h);
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else
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recvc(s,d,lx,lx2,h);
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else if (xh && !yh)
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if (w!=8)
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rech(s,d,lx,lx2,h);
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else
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rechc(s,d,lx,lx2,h);
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else /* if (xh && yh) */
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if (w!=8)
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rec4(s,d,lx,lx2,h);
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else
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rec4c(s,d,lx,lx2,h);
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}
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static void rec(unsigned char *s,unsigned char *d,int lx,int lx2,int h)
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{
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int j;
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for (j=0; j<h; j++)
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{
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d[0] = s[0];
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d[1] = s[1];
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d[2] = s[2];
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d[3] = s[3];
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d[4] = s[4];
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d[5] = s[5];
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d[6] = s[6];
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d[7] = s[7];
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d[8] = s[8];
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d[9] = s[9];
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d[10] = s[10];
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d[11] = s[11];
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d[12] = s[12];
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d[13] = s[13];
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d[14] = s[14];
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d[15] = s[15];
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s+= lx2;
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d+= lx;
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}
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}
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static void recc(unsigned char *s,unsigned char *d,int lx,int lx2,int h)
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{
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int j;
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for (j=0; j<h; j++)
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{
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d[0] = s[0];
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d[1] = s[1];
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d[2] = s[2];
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d[3] = s[3];
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d[4] = s[4];
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d[5] = s[5];
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d[6] = s[6];
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d[7] = s[7];
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s+= lx2;
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d+= lx;
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}
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}
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static void rech(unsigned char *s,unsigned char *d,int lx,int lx2,int h)
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{
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unsigned char *dp,*sp;
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int j;
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unsigned int s1,s2;
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sp = s;
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dp = d;
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for (j=0; j<h; j++)
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{
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s1=sp[0];
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dp[0] = (unsigned int)(s1+(s2=sp[1])+1)>>1;
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dp[1] = (unsigned int)(s2+(s1=sp[2])+1)>>1;
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dp[2] = (unsigned int)(s1+(s2=sp[3])+1)>>1;
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dp[3] = (unsigned int)(s2+(s1=sp[4])+1)>>1;
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dp[4] = (unsigned int)(s1+(s2=sp[5])+1)>>1;
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dp[5] = (unsigned int)(s2+(s1=sp[6])+1)>>1;
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dp[6] = (unsigned int)(s1+(s2=sp[7])+1)>>1;
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dp[7] = (unsigned int)(s2+(s1=sp[8])+1)>>1;
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dp[8] = (unsigned int)(s1+(s2=sp[9])+1)>>1;
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dp[9] = (unsigned int)(s2+(s1=sp[10])+1)>>1;
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dp[10] = (unsigned int)(s1+(s2=sp[11])+1)>>1;
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dp[11] = (unsigned int)(s2+(s1=sp[12])+1)>>1;
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dp[12] = (unsigned int)(s1+(s2=sp[13])+1)>>1;
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dp[13] = (unsigned int)(s2+(s1=sp[14])+1)>>1;
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dp[14] = (unsigned int)(s1+(s2=sp[15])+1)>>1;
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dp[15] = (unsigned int)(s2+sp[16]+1)>>1;
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sp+= lx2;
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dp+= lx;
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}
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}
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static void rechc(unsigned char *s,unsigned char *d,int lx,int lx2,int h)
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{
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unsigned char *dp,*sp;
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int j;
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unsigned int s1,s2;
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sp = s;
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dp = d;
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for (j=0; j<h; j++)
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{
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s1=sp[0];
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dp[0] = (unsigned int)(s1+(s2=sp[1])+1)>>1;
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dp[1] = (unsigned int)(s2+(s1=sp[2])+1)>>1;
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dp[2] = (unsigned int)(s1+(s2=sp[3])+1)>>1;
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dp[3] = (unsigned int)(s2+(s1=sp[4])+1)>>1;
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dp[4] = (unsigned int)(s1+(s2=sp[5])+1)>>1;
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dp[5] = (unsigned int)(s2+(s1=sp[6])+1)>>1;
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dp[6] = (unsigned int)(s1+(s2=sp[7])+1)>>1;
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dp[7] = (unsigned int)(s2+sp[8]+1)>>1;
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sp+= lx2;
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dp+= lx;
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}
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}
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static void h263_recv(unsigned char *s,unsigned char *d,int lx,int lx2,int h)
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{
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unsigned char *dp,*sp,*sp2;
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int j;
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sp = s;
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sp2 = s+lx2;
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dp = d;
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for (j=0; j<h; j++)
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{
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dp[0] = (unsigned int)(sp[0]+sp2[0]+1)>>1;
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dp[1] = (unsigned int)(sp[1]+sp2[1]+1)>>1;
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dp[2] = (unsigned int)(sp[2]+sp2[2]+1)>>1;
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dp[3] = (unsigned int)(sp[3]+sp2[3]+1)>>1;
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dp[4] = (unsigned int)(sp[4]+sp2[4]+1)>>1;
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dp[5] = (unsigned int)(sp[5]+sp2[5]+1)>>1;
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dp[6] = (unsigned int)(sp[6]+sp2[6]+1)>>1;
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dp[7] = (unsigned int)(sp[7]+sp2[7]+1)>>1;
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dp[8] = (unsigned int)(sp[8]+sp2[8]+1)>>1;
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dp[9] = (unsigned int)(sp[9]+sp2[9]+1)>>1;
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dp[10] = (unsigned int)(sp[10]+sp2[10]+1)>>1;
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dp[11] = (unsigned int)(sp[11]+sp2[11]+1)>>1;
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dp[12] = (unsigned int)(sp[12]+sp2[12]+1)>>1;
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dp[13] = (unsigned int)(sp[13]+sp2[13]+1)>>1;
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dp[14] = (unsigned int)(sp[14]+sp2[14]+1)>>1;
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dp[15] = (unsigned int)(sp[15]+sp2[15]+1)>>1;
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sp+= lx2;
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sp2+= lx2;
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dp+= lx;
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}
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}
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static void recvc(unsigned char *s,unsigned char *d,int lx,int lx2,int h)
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{
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unsigned char *dp,*sp,*sp2;
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int j;
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sp = s;
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sp2 = s+lx2;
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dp = d;
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for (j=0; j<h; j++)
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{
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dp[0] = (unsigned int)(sp[0]+sp2[0]+1)>>1;
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dp[1] = (unsigned int)(sp[1]+sp2[1]+1)>>1;
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dp[2] = (unsigned int)(sp[2]+sp2[2]+1)>>1;
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dp[3] = (unsigned int)(sp[3]+sp2[3]+1)>>1;
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dp[4] = (unsigned int)(sp[4]+sp2[4]+1)>>1;
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dp[5] = (unsigned int)(sp[5]+sp2[5]+1)>>1;
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dp[6] = (unsigned int)(sp[6]+sp2[6]+1)>>1;
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dp[7] = (unsigned int)(sp[7]+sp2[7]+1)>>1;
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sp+= lx2;
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sp2+= lx2;
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dp+= lx;
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}
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}
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static void rec4(unsigned char *s,unsigned char *d,int lx,int lx2,int h)
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{
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unsigned char *dp,*sp,*sp2;
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int j;
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unsigned int s1,s2,s3,s4;
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sp = s;
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sp2 = s+lx2;
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dp = d;
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for (j=0; j<h; j++)
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{
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s1=sp[0]; s3=sp2[0];
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dp[0] = (unsigned int)(s1+(s2=sp[1])+s3+(s4=sp2[1])+2)>>2;
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dp[1] = (unsigned int)(s2+(s1=sp[2])+s4+(s3=sp2[2])+2)>>2;
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dp[2] = (unsigned int)(s1+(s2=sp[3])+s3+(s4=sp2[3])+2)>>2;
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dp[3] = (unsigned int)(s2+(s1=sp[4])+s4+(s3=sp2[4])+2)>>2;
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dp[4] = (unsigned int)(s1+(s2=sp[5])+s3+(s4=sp2[5])+2)>>2;
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dp[5] = (unsigned int)(s2+(s1=sp[6])+s4+(s3=sp2[6])+2)>>2;
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dp[6] = (unsigned int)(s1+(s2=sp[7])+s3+(s4=sp2[7])+2)>>2;
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dp[7] = (unsigned int)(s2+(s1=sp[8])+s4+(s3=sp2[8])+2)>>2;
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dp[8] = (unsigned int)(s1+(s2=sp[9])+s3+(s4=sp2[9])+2)>>2;
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dp[9] = (unsigned int)(s2+(s1=sp[10])+s4+(s3=sp2[10])+2)>>2;
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dp[10] = (unsigned int)(s1+(s2=sp[11])+s3+(s4=sp2[11])+2)>>2;
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dp[11] = (unsigned int)(s2+(s1=sp[12])+s4+(s3=sp2[12])+2)>>2;
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dp[12] = (unsigned int)(s1+(s2=sp[13])+s3+(s4=sp2[13])+2)>>2;
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dp[13] = (unsigned int)(s2+(s1=sp[14])+s4+(s3=sp2[14])+2)>>2;
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dp[14] = (unsigned int)(s1+(s2=sp[15])+s3+(s4=sp2[15])+2)>>2;
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dp[15] = (unsigned int)(s2+sp[16]+s4+sp2[16]+2)>>2;
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sp+= lx2;
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sp2+= lx2;
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dp+= lx;
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}
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}
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static void rec4c(unsigned char *s,unsigned char *d,int lx,int lx2,int h)
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{
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unsigned char *dp,*sp,*sp2;
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int j;
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unsigned int s1,s2,s3,s4;
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sp = s;
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sp2 = s+lx2;
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dp = d;
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for (j=0; j<h; j++)
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{
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s1=sp[0]; s3=sp2[0];
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dp[0] = (unsigned int)(s1+(s2=sp[1])+s3+(s4=sp2[1])+2)>>2;
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dp[1] = (unsigned int)(s2+(s1=sp[2])+s4+(s3=sp2[2])+2)>>2;
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dp[2] = (unsigned int)(s1+(s2=sp[3])+s3+(s4=sp2[3])+2)>>2;
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dp[3] = (unsigned int)(s2+(s1=sp[4])+s4+(s3=sp2[4])+2)>>2;
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dp[4] = (unsigned int)(s1+(s2=sp[5])+s3+(s4=sp2[5])+2)>>2;
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dp[5] = (unsigned int)(s2+(s1=sp[6])+s4+(s3=sp2[6])+2)>>2;
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dp[6] = (unsigned int)(s1+(s2=sp[7])+s3+(s4=sp2[7])+2)>>2;
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dp[7] = (unsigned int)(s2+sp[8]+s4+sp2[8]+2)>>2;
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sp+= lx2;
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sp2+= lx2;
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dp+= lx;
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}
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}
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