289 lines
10 KiB
C
289 lines
10 KiB
C
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//*@@@+++@@@@******************************************************************
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//
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// Copyright © Microsoft Corp.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// • Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// • Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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//*@@@---@@@@******************************************************************
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#include "windowsmediaphoto.h"
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#include "strcodec.h"
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Void smoothMB(PixelI * p1, PixelI * p0, PixelI * q0, PixelI * q1)
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{
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// p1 p0 | q0 q1
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PixelI delta = ((((*q0 - *p0) << 2) + (*p1 - *q1)) >> 3);
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*q0 -= delta;
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*p0 += delta;
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}
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Void smooth(PixelI * p2, PixelI * p1, PixelI * p0, PixelI * q0, PixelI * q1, PixelI * q2)
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{
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// p2 p1 p0 | q0 q1 q2
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PixelI delta = ((((*q0 - *p0) << 2) + (*p1 - *q1)) >> 3);
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*q0 -= delta;
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*p0 += delta;
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*p1 = (*p1 >> 1) + ((*p0 + *p2) >> 2);
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*q1 = (*q1 >> 1) + ((*q0 + *q2) >> 2);
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}
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Int initPostProc(struct tagPostProcInfo * strPostProcInfo[MAX_CHANNELS][2], size_t mbWidth, size_t iNumChannels)
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{
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size_t i, j, k, l;
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Bool b32bit = sizeof(int) == 4;
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for(j = 0; j < iNumChannels; j ++){
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for(i = 0; i < 2; i ++){
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// 2 more are allocated to avoid boundary check
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if(b32bit) // integer overlow/underflow check for 32-bit system
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if((((mbWidth + 2) >> 16) * sizeof(struct tagPostProcInfo)) & 0xffff0000)
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return ICERR_ERROR;
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strPostProcInfo[j][i] = (struct tagPostProcInfo *)malloc((mbWidth + 2) * sizeof(struct tagPostProcInfo));
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assert(strPostProcInfo[j][i] != NULL);
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if(strPostProcInfo[j][i] == NULL){
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return ICERR_ERROR;
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}
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strPostProcInfo[j][i] ++;
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// initialize out-of-bound MBs as bumpy (no post at all) to avoid boundary check
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// left boundary
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strPostProcInfo[j][i][-1].ucMBTexture = 3;
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for(l = 0; l < 4; l ++){
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for(k = 0; k < 4; k ++){
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strPostProcInfo[j][i][-1].ucBlockTexture[l][k] = 3;
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}
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}
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// right boundary
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strPostProcInfo[j][i][mbWidth] = strPostProcInfo[j][i][-1];
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}
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}
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return ICERR_OK;
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}
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Void termPostProc(struct tagPostProcInfo * strPostProcInfo[MAX_CHANNELS][2], size_t iNumChannels)
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{
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size_t i, j;
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for(j = 0; j < iNumChannels; j ++){
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for(i = 0; i < 2; i ++){
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if(strPostProcInfo[j][i] != NULL){
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free(strPostProcInfo[j][i] - 1);
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}
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}
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}
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}
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Void slideOneMBRow(struct tagPostProcInfo * strPostProcInfo[MAX_CHANNELS][2], size_t iNumChannels, size_t mbWidth, Bool top, Bool bottom)
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{
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size_t i, j;
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struct tagPostProcInfo * bar;
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for(i = 0; i < iNumChannels; i ++){
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// swap previous row and current row
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bar = strPostProcInfo[i][0];
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strPostProcInfo[i][0] = strPostProcInfo[i][1];
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strPostProcInfo[i][1] = bar;
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if(top){ // if top row, previous row is out of boundary
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for(j = 0; j < mbWidth; j ++){
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strPostProcInfo[i][0][j] = strPostProcInfo[i][0][-1]; // set as bumpy
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}
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}
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if(bottom){ // if bottom bottom row, set current row of MBs (out of boundary) as bumpy
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for(j = 0; j < mbWidth; j ++){
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strPostProcInfo[i][1][j] = strPostProcInfo[i][1][-1]; // set as bumpy
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}
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}
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}
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}
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// get DC and texture infomation right before transform
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Void updatePostProcInfo(struct tagPostProcInfo * strPostProcInfo[MAX_CHANNELS][2], PixelI * pMB, size_t mbX, size_t cc)
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{
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size_t i, j;
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struct tagPostProcInfo * pMBInfo = strPostProcInfo[cc][1] + mbX;
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// DC of MB
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pMBInfo->iMBDC = pMB[0];
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// texture of MB
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pMBInfo->ucMBTexture = 0; // smooth
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for(i = 16; i < 256; i += 16){
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if(pMB[i] != 0){
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pMBInfo->ucMBTexture = 3; // bumpy
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break;
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}
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}
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// DCs of blocks not available yet, will collect after demacroblocking
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// textures of blocks
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for(j = 0; j < 4; j ++)
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for(i = 0; i < 4; i ++){
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PixelI * p = pMB + i * 64 + j * 16;
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size_t k;
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for(k = 1, pMBInfo->ucBlockTexture[j][i] = 0; k < 16; k ++){
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if(p[k] != 0){
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pMBInfo->ucBlockTexture[j][i] = 3;
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break;
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}
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}
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}
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}
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// demacroblock critirion: two MBs have same texture other than bumpy and DCs differ less than 1
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#define DMB(a, b) (a->ucMBTexture + b->ucMBTexture == 0) && (abs(a->iMBDC - b->iMBDC) <= threshold)
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// demacroblock and get DCs of blocks
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Void postProcMB(struct tagPostProcInfo * strPostProcInfo[MAX_CHANNELS][2], PixelI * p0, PixelI * p1, size_t mbX, size_t cc, Int threshold)
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{
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/* 4 MBs involved, current MB is d, we have 4 2-pixel boundary segments */
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/* | */
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/* a | b */
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/* - - + + */
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/* c ! d */
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/* ! */
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struct tagPostProcInfo * pMBb = strPostProcInfo[cc][0] + mbX, * pMBa = pMBb - 1, * pMBd = strPostProcInfo[cc][1] + mbX, * pMBc = pMBd - 1;
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// demacroblock segment --
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if(DMB(pMBa, pMBc)){
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smoothMB(p0 - 256 + 10 * 16, p0 - 256 + 11 * 16, p1 - 256 + 8 * 16, p1 - 256 + 9 * 16);
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smoothMB(p0 - 256 + 14 * 16, p0 - 256 + 15 * 16, p1 - 256 + 12 * 16, p1 - 256 + 13 * 16);
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}
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// demacroblock segment ++
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if(DMB(pMBb, pMBd)){
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smoothMB(p0 + 2 * 16, p0 + 3 * 16, p1 + 0 * 16, p1 + 1 * 16);
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smoothMB(p0 + 6 * 16, p0 + 7 * 16, p1 + 4 * 16, p1 + 5 * 16);
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}
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// demacroblock segment |
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if(DMB(pMBa, pMBb)){
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smoothMB(p0 - 256 + 10 * 16, p0 - 256 + 14 * 16, p0 + 2 * 16, p0 + 6 * 16);
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smoothMB(p0 - 256 + 11 * 16, p0 - 256 + 15 * 16, p0 + 3 * 16, p0 + 7 * 16);
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}
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// demacroblock segment !
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if(DMB(pMBc, pMBd)){
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smoothMB(p1 - 256 + 8 * 16, p1 - 256 + 12 * 16, p1 + 0 * 16, p1 + 4 * 16);
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smoothMB(p1 - 256 + 9 * 16, p1 - 256 + 13 * 16, p1 + 1 * 16, p1 + 5 * 16);
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}
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/* update DCs of blocks */
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// MB d
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pMBd->iBlockDC[0][0] = p1[0 * 16];
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pMBd->iBlockDC[0][1] = p1[4 * 16];
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pMBd->iBlockDC[1][0] = p1[1 * 16];
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pMBd->iBlockDC[1][1] = p1[5 * 16];
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// MB b
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pMBb->iBlockDC[2][0] = p0[2 * 16];
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pMBb->iBlockDC[2][1] = p0[6 * 16];
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pMBb->iBlockDC[3][0] = p0[3 * 16];
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pMBb->iBlockDC[3][1] = p0[7 * 16];
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// MB c
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pMBc->iBlockDC[0][2] = p1[ 8 * 16 - 256];
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pMBc->iBlockDC[0][3] = p1[12 * 16 - 256];
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pMBc->iBlockDC[1][2] = p1[ 9 * 16 - 256];
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pMBc->iBlockDC[1][3] = p1[13 * 16 - 256];
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// MB a
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pMBa->iBlockDC[2][2] = p0[10 * 16 - 256];
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pMBa->iBlockDC[2][3] = p0[14 * 16 - 256];
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pMBa->iBlockDC[3][2] = p0[11 * 16 - 256];
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pMBa->iBlockDC[3][3] = p0[15 * 16 - 256];
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}
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/* deblock and destair blocks */
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/* 4 MBs involved, need to process 16 blocks of a */
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/* | */
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/* a | b */
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/* - - - - */
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/* c | d */
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/* | */
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Void postProcBlock(struct tagPostProcInfo * strPostProcInfo[MAX_CHANNELS][2], PixelI * p0, PixelI * p1, size_t mbX, size_t cc, Int threshold)
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{
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size_t i, j, k;
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Int dc[5][5];
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U8 texture[5][5];
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struct tagPostProcInfo * pMBb = strPostProcInfo[cc][0] + mbX, * pMBa = pMBb - 1, * pMBd = strPostProcInfo[cc][1] + mbX, * pMBc = pMBd - 1;
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PixelI * pc, * pt;
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/* copy DC and Texture info, can be optimized out */
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for(j = 0; j < 4; j ++){
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// from MB a
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for(i = 0; i < 4; i ++){
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dc[j][i] = pMBa->iBlockDC[j][i];
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texture[j][i] = pMBa->ucBlockTexture[j][i];
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}
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// 4 blocks from MB c
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dc[4][j] = pMBc->iBlockDC[0][j];
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texture[4][j] = pMBc->ucBlockTexture[0][j];
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// 4 blocks from MB b
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dc[j][4] = pMBb->iBlockDC[j][0];
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texture[j][4] = pMBb->ucBlockTexture[j][0];
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}
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// 1 block from MB d
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dc[4][4] = pMBd->iBlockDC[0][0];
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texture[4][4] = pMBd->ucBlockTexture[0][0];
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/* block boundaries */
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/* | */
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/* | */
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/* --- */
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for(j = 0; j < 4; j ++){
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for(i = 0; i < 4; i ++){
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pc = p0 - 256 + i * 64 + j * 16;
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// deblock
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if(texture[j][i] + texture[j + 1][i] < 3 && abs(dc[j][i] - dc[j + 1][i]) <= threshold){
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// smooth horizontal boundary ----
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pt = (j < 3 ? pc + 16 : p1 - 256 + i * 64);
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for(k = 0; k < 4; k ++){
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smooth(pc + idxCC[1][k], pc + idxCC[2][k], pc + idxCC[3][k], pt + idxCC[0][k], pt + idxCC[1][k], pt + idxCC[2][k]);
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}
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}
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// two horizontally adjacent blocks have same texture and similiar DCs
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if(texture[j][i] + texture[j][i + 1] < 3 && abs(dc[j][i] - dc[j][i + 1]) <= threshold){
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// smooth vertical boundary |
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pt = pc + 64;
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for(k = 0; k < 4; k ++){
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smooth(pc + idxCC[k][1], pc + idxCC[k][2], pc + idxCC[k][3], pt + idxCC[k][0], pt + idxCC[k][1], pt + idxCC[k][2]);
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}
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}
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}
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}
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}
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