Initial community commit

1 files changed, 831 insertions, 0 deletions

diff --git a/Src/mpeg4dec/mp4decvopb.c b/Src/mpeg4dec/mp4decvopb.c
new file mode 100644
index 00000000..7b65ae02
--- /dev/null
+++ b/Src/mpeg4dec/mp4decvopb.c
@@ -0,0 +1,831 @@
+/* ///////////////////////////////////////////////////////////////////////
+//
+//               INTEL CORPORATION PROPRIETARY INFORMATION
+//  This software is supplied under the terms of a license agreement or
+//  nondisclosure agreement with Intel Corporation and may not be copied
+//  or disclosed except in accordance with the terms of that agreement.
+//        Copyright (c) 2001-2007 Intel Corporation. All Rights Reserved.
+//
+//  Description:    Decodes B-VOPs
+//
+*/
+
+
+#include "mp4def.h"
+#include "mp4dec.h"
+
+/*
+//  Purpose:  decode MPEG-4 BVOP
+*/
+mp4_Status mp4_DecodeVOP_B(mp4_Info* pInfo)
+{
+    __ALIGN16(int16_t, coeffMB, 64*6);
+    __ALIGN16(uint8_t, tmpMB, 64*4);
+    uint32_t          code;
+    uint8_t          *pYc, *pCbc, *pCrc, *pYp, *pCbp, *pCrp, *pYn, *pCbn, *pCrn, *pc, *pr, *pn;
+    int32_t          stepYp, stepYc, stepYn, stepCbp, stepCbc, stepCbn, stepCrp, stepCrc, stepCrn, mbPerRow, mbPerCol;
+    int32_t          dx, dy, TRB, TRD, quant, mbCurr, mbInVideoPacket, colNum, rowNum;
+    IppiRect        limitRectL, limitRectC;
+    int32_t          quarter_sample, modb, mb_type, cbpb, dct_type, field_prediction, rvlc = 0, scan;
+    int32_t          mb_ftfr, mb_fbfr, mb_btfr, mb_bbfr, fcode_forward, fcode_backward;
+    mp4_MacroBlock *pMBinfo;
+    mp4_Status      sts;
+
+    sts = MP4_STATUS_OK;
+
+		if (!pInfo->VisualObject.cFrame)
+			pInfo->VisualObject.cFrame = CreateFrame(&pInfo->VisualObject);
+    stepYc = pInfo->VisualObject.cFrame->stepY;
+    stepYp = pInfo->VisualObject.rFrame->stepY;
+    stepYn = pInfo->VisualObject.nFrame->stepY;
+    stepCbc = pInfo->VisualObject.cFrame->stepCb;
+    stepCbp = pInfo->VisualObject.rFrame->stepCb;
+    stepCbn = pInfo->VisualObject.nFrame->stepCb;
+    stepCrc = pInfo->VisualObject.cFrame->stepCr;
+    stepCrp = pInfo->VisualObject.rFrame->stepCr;
+    stepCrn = pInfo->VisualObject.nFrame->stepCr;
+    pYc = pInfo->VisualObject.cFrame->pY;
+    pCbc = pInfo->VisualObject.cFrame->pCb;
+    pCrc = pInfo->VisualObject.cFrame->pCr;
+    pYp = pInfo->VisualObject.rFrame->pY;
+    pCbp = pInfo->VisualObject.rFrame->pCb;
+    pCrp = pInfo->VisualObject.rFrame->pCr;
+    pYn = pInfo->VisualObject.nFrame->pY;
+    pCbn = pInfo->VisualObject.nFrame->pCb;
+    pCrn = pInfo->VisualObject.nFrame->pCr;
+    quarter_sample = pInfo->VisualObject.VideoObject.quarter_sample;
+    scan = pInfo->VisualObject.VideoObject.VideoObjectPlane.alternate_vertical_scan_flag ? IPPVC_SCAN_VERTICAL : IPPVC_SCAN_ZIGZAG;
+    fcode_forward = pInfo->VisualObject.VideoObject.VideoObjectPlane.fcode_forward;
+    fcode_backward = pInfo->VisualObject.VideoObject.VideoObjectPlane.fcode_backward;
+    // Bounding rectangles for MV limitation
+    limitRectL.x = - 16 * MP4_NUM_EXT_MB;
+    limitRectL.y = - 16 * MP4_NUM_EXT_MB;
+    limitRectL.width = pInfo->VisualObject.VideoObject.width + 16 * 2 * MP4_NUM_EXT_MB;
+    limitRectL.height = pInfo->VisualObject.VideoObject.height + 16 * 2 * MP4_NUM_EXT_MB;
+    limitRectC.x = -8 * MP4_NUM_EXT_MB;
+    limitRectC.y = -8 * MP4_NUM_EXT_MB;
+    limitRectC.width = (pInfo->VisualObject.VideoObject.width >> 1) + 8 * 2 * MP4_NUM_EXT_MB;
+    limitRectC.height = (pInfo->VisualObject.VideoObject.height >> 1) + 8 * 2 * MP4_NUM_EXT_MB;
+    quant = pInfo->VisualObject.VideoObject.VideoObjectPlane.quant;
+    mbPerRow = pInfo->VisualObject.VideoObject.MacroBlockPerRow;
+    mbPerCol = pInfo->VisualObject.VideoObject.MacroBlockPerCol;
+    mbCurr = colNum = rowNum = 0;
+    TRD = pInfo->VisualObject.VideoObject.TRD;
+    TRB = pInfo->VisualObject.VideoObject.TRB;
+    pMBinfo = pInfo->VisualObject.VideoObject.MBinfo;
+// decode interlaced B-VOP
+    if (pInfo->VisualObject.VideoObject.interlaced) {
+        IppMotionVector  mvCbCrF, mvCbCrB, mvForwT, mvBackT, mvForwB, mvBackB, mvForw[4], mvBack[4], mvCbCrFFT, mvCbCrFFB, mvCbCrBFT, mvCbCrBFB, *mvField = pInfo->VisualObject.VideoObject.FieldMV;
+
+        // warning "variable may be used without having been initialized"
+        mvCbCrF.dx = mvCbCrF.dy = mvCbCrB.dx = mvCbCrB.dy = mvCbCrFFT.dx = mvCbCrFFT.dy = mvCbCrFFB.dx = mvCbCrFFB.dy = mvCbCrBFT.dx = mvCbCrBFT.dy = mvCbCrBFB.dx = mvCbCrBFB.dy = 0;
+        mb_ftfr = mb_fbfr = mb_btfr = mb_bbfr = 0;
+        for (;;) {
+            mbInVideoPacket = 0;
+            // reset MV predictors at new VideoPacket
+            mvForwT.dx = mvForwT.dy = mvBackT.dx = mvBackT.dy = mvForwB.dx = mvForwB.dy = mvBackB.dx = mvBackB.dy = 0;
+            // decode B-VOP macroblocks
+            for (;;) {
+                if (pMBinfo->not_coded) {
+                    ippiCopy16x16_8u_C1R(pYp, stepYp, pYc, stepYc);
+                    ippiCopy8x8_8u_C1R(pCbp, stepCbp, pCbc, stepCbc);
+                    ippiCopy8x8_8u_C1R(pCrp, stepCrp, pCrc, stepCrc);
+                    mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_NOTCODED);
+                } else {
+                    cbpb = 0;
+                    if (mp4_GetBit(pInfo)) {
+                        modb = 2;
+                        mb_type = IPPVC_MBTYPE_DIRECT;
+                    } else {
+                        modb = mp4_GetBit(pInfo);
+                        // decode mb_type
+                        code = mp4_ShowBits9(pInfo, 4);
+                        if (code != 0) {
+                            mb_type = mp4_BVOPmb_type[code].code;
+                            mp4_FlushBits(pInfo, mp4_BVOPmb_type[code].len);
+                        } else {
+                            mp4_Error("Error when decode mb_type of B-VOP macroblock");
+                            goto Err_1;
+                        }
+                        if (modb == 0)
+                            cbpb = mp4_GetBits9(pInfo, 6);
+                        if (mb_type != IPPVC_MBTYPE_DIRECT && cbpb != 0)
+                            mp4_UpdateQuant_B(pInfo, quant);
+                    }
+                    dct_type = 0;
+                    field_prediction = 0;
+                    if (cbpb != 0)
+                        dct_type = mp4_GetBit(pInfo);
+                    if (mb_type != IPPVC_MBTYPE_DIRECT) {
+                        field_prediction = mp4_GetBit(pInfo);
+                        if (field_prediction) {
+                            if (mb_type != IPPVC_MBTYPE_BACKWARD) {
+                                mb_ftfr = mp4_GetBit(pInfo);
+                                mb_fbfr = mp4_GetBit(pInfo);
+                            }
+                            if (mb_type != IPPVC_MBTYPE_FORWARD) {
+                                mb_btfr = mp4_GetBit(pInfo);
+                                mb_bbfr = mp4_GetBit(pInfo);
+                            }
+                        }
+                    }
+                    // coordinates of current MB for limitation
+                    dx = colNum * 16;
+                    dy = rowNum * 16;
+                    if (mb_type == IPPVC_MBTYPE_FORWARD) {
+                        mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_FORWARD);
+                        if (!field_prediction) {
+                            if (mp4_DecodeMV(pInfo, &mvForwT, fcode_forward) != MP4_STATUS_OK)
+                                goto Err_1;
+                            if (quarter_sample) {
+                                mp4_LimitMVQ(&mvForwT, &mvForw[0], &limitRectL, dx, dy, 16);
+                                mp4_ComputeChromaMVQ(&mvForw[0], &mvCbCrF);
+                                mp4_Copy16x16QP_8u(pYp, stepYp, pYc, stepYc, &mvForw[0], 0);
+                            } else {
+                                mp4_LimitMV(&mvForwT, &mvForw[0], &limitRectL, dx, dy, 16);
+                                mp4_ComputeChromaMV(&mvForw[0], &mvCbCrF);
+                                mp4_Copy16x16HP_8u(pYp, stepYp, pYc, stepYc, &mvForw[0], 0);
+                            }
+                            //mvForw[1] = mvForw[2] = mvForw[3] = mvForw[0];
+                            mvForwB = mvForwT;
+                        } else {
+                            mvForwT.dy = (int16_t)mp4_Div2(mvForwT.dy);
+                            if (mp4_DecodeMV(pInfo, &mvForwT, fcode_forward) != MP4_STATUS_OK)
+                                goto Err_1;
+                            mvForwB.dy = (int16_t)mp4_Div2(mvForwB.dy);
+                            if (mp4_DecodeMV(pInfo, &mvForwB, fcode_forward) != MP4_STATUS_OK)
+                                goto Err_1;
+                            if (quarter_sample) {
+                                mp4_LimitFMVQ(&mvForwT, &mvForw[0], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8QP_8u(pYp+(mb_ftfr ? stepYp : 0), stepYp*2, pYc, stepYc*2, &mvForw[0], 0);
+                                mvForw[0].dx = (int16_t)mp4_Div2(mvForw[0].dx);
+                                mvForw[0].dy = (int16_t)(mp4_Div2(mvForw[0].dy*2) >> 1);
+                                mp4_LimitFMVQ(&mvForwB, &mvForw[2], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8QP_8u(pYp+(mb_fbfr ? stepYp : 0), stepYp*2, pYc+stepYc, stepYc*2, &mvForw[2], 0);
+                                mvForw[2].dx = (int16_t)mp4_Div2(mvForw[2].dx);
+                                mvForw[2].dy = (int16_t)(mp4_Div2(mvForw[2].dy*2) >> 1);
+                            } else {
+                                mp4_LimitFMV(&mvForwT, &mvForw[0], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8HP_8u(pYp+(mb_ftfr ? stepYp : 0), stepYp*2, pYc, stepYc*2, &mvForw[0], 0);
+                                mp4_LimitFMV(&mvForwB, &mvForw[2], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8HP_8u(pYp+(mb_fbfr ? stepYp : 0), stepYp*2, pYc+stepYc, stepYc*2, &mvForw[2], 0);
+                            }
+                            mvForwT.dy <<= 1;
+                            mvForwB.dy <<= 1;
+                            //mvForw[1] = mvForw[0];
+                            //mvForw[3] = mvForw[2];
+                            mp4_ComputeChromaMV(&mvForw[0], &mvCbCrFFT);
+                            mp4_ComputeChromaMV(&mvForw[2], &mvCbCrFFB);
+                        }
+                        if (mp4_DecodeInterMB(pInfo, coeffMB, quant, cbpb, scan) != MP4_STATUS_OK)
+                            goto Err_1;
+                        if (!dct_type) {
+                            mp4_AddResidual(cbpb & 32, pYc, stepYc, coeffMB);
+                            mp4_AddResidual(cbpb & 16, pYc+8, stepYc, coeffMB+64);
+                            mp4_AddResidual(cbpb & 8, pYc+stepYc*8, stepYc, coeffMB+128);
+                            mp4_AddResidual(cbpb & 4, pYc+stepYc*8+8, stepYc, coeffMB+192);
+                        } else {
+                            mp4_AddResidual(cbpb & 32, pYc, stepYc*2, coeffMB);
+                            mp4_AddResidual(cbpb & 16, pYc+8, stepYc*2, coeffMB+64);
+                            mp4_AddResidual(cbpb & 8, pYc+stepYc, stepYc*2, coeffMB+128);
+                            mp4_AddResidual(cbpb & 4, pYc+stepYc+8, stepYc*2, coeffMB+192);
+                        }
+                        if (!field_prediction) {
+                            mp4_MC_HP(cbpb & 2, pCbp, stepCbp, pCbc, stepCbc, coeffMB+256, &mvCbCrF, 0);
+                            mp4_MC_HP(cbpb & 1, pCrp, stepCrp, pCrc, stepCrc, coeffMB+320, &mvCbCrF, 0);
+                        } else {
+                            mp4_Copy8x4HP_8u(pCbp+(mb_ftfr ? stepCbp : 0), stepCbp*2, pCbc, stepCbc*2, &mvCbCrFFT, 0);
+                            mp4_Copy8x4HP_8u(pCrp+(mb_ftfr ? stepCrp : 0), stepCrp*2, pCrc, stepCrc*2, &mvCbCrFFT, 0);
+                            mp4_Copy8x4HP_8u(pCbp+(mb_fbfr ? stepCbp : 0), stepCbp*2, pCbc+stepCbc, stepCbc*2, &mvCbCrFFB, 0);
+                            mp4_Copy8x4HP_8u(pCrp+(mb_fbfr ? stepCrp : 0), stepCrp*2, pCrc+stepCrc, stepCrc*2, &mvCbCrFFB, 0);
+                            mp4_AddResidual(cbpb & 2, pCbc, stepCbc, coeffMB+256);
+                            mp4_AddResidual(cbpb & 1, pCrc, stepCrc, coeffMB+320);
+                        }
+                    } else if (mb_type == IPPVC_MBTYPE_BACKWARD) {
+                        mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_BACKWARD);
+                        if (!field_prediction) {
+                            if (mp4_DecodeMV(pInfo, &mvBackT, fcode_backward) != MP4_STATUS_OK)
+                                goto Err_1;
+                            if (quarter_sample) {
+                                mp4_LimitMVQ(&mvBackT, &mvBack[0], &limitRectL, dx, dy, 16);
+                                mp4_ComputeChromaMVQ(&mvBack[0], &mvCbCrB);
+                                mp4_Copy16x16QP_8u(pYn, stepYn, pYc, stepYc, &mvBack[0], 0);
+                            } else {
+                                mp4_LimitMV(&mvBackT, &mvBack[0], &limitRectL, dx, dy, 16);
+                                mp4_ComputeChromaMV(&mvBack[0], &mvCbCrB);
+                                mp4_Copy16x16HP_8u(pYn, stepYn, pYc, stepYc, &mvBack[0], 0);
+                            }
+                            //mvBack[1] = mvBack[2] = mvBack[3] = mvBack[0];
+                            mvBackB = mvBackT;
+                        } else {
+                            mvBackT.dy = (int16_t)mp4_Div2(mvBackT.dy);
+                            if (mp4_DecodeMV(pInfo, &mvBackT, fcode_backward) != MP4_STATUS_OK)
+                                goto Err_1;
+                            mvBackB.dy = (int16_t)mp4_Div2(mvBackB.dy);
+                            if (mp4_DecodeMV(pInfo, &mvBackB, fcode_backward) != MP4_STATUS_OK)
+                                goto Err_1;
+                            if (quarter_sample) {
+                                mp4_LimitFMVQ(&mvBackT, &mvBack[0], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8QP_8u(pYn+(mb_btfr ? stepYn : 0), stepYn*2, pYc, stepYc*2, &mvBack[0], 0);
+                                mvBack[0].dx = (int16_t)mp4_Div2(mvBack[0].dx);
+                                mvBack[0].dy = (int16_t)(mp4_Div2(mvBack[0].dy*2) >> 1);
+                                mp4_LimitFMVQ(&mvBackB, &mvBack[2], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8QP_8u(pYn+(mb_bbfr ? stepYn : 0), stepYn*2, pYc+stepYc, stepYc*2, &mvBack[2], 0);
+                                mvBack[2].dx = (int16_t)mp4_Div2(mvBack[2].dx);
+                                mvBack[2].dy = (int16_t)(mp4_Div2(mvBack[2].dy*2) >> 1);
+                            } else {
+                                mp4_LimitFMV(&mvBackT, &mvBack[0], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8HP_8u(pYn+(mb_btfr ? stepYn : 0), stepYn*2, pYc, stepYc*2, &mvBack[0], 0);
+                                mp4_LimitFMV(&mvBackB, &mvBack[2], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8HP_8u(pYn+(mb_bbfr ? stepYn : 0), stepYn*2, pYc+stepYc, stepYc*2, &mvBack[2], 0);
+                            }
+                            mvBackT.dy <<= 1;
+                            mvBackB.dy <<= 1;
+                            //mvBack[1] = mvBack[0];
+                            //mvBack[3] = mvBack[2];
+                            mp4_ComputeChromaMV(&mvBack[0], &mvCbCrBFT);
+                            mp4_ComputeChromaMV(&mvBack[2], &mvCbCrBFB);
+                        }
+                        if (mp4_DecodeInterMB(pInfo, coeffMB, quant, cbpb, scan) != MP4_STATUS_OK)
+                            goto Err_1;
+                        if (!dct_type) {
+                            mp4_AddResidual(cbpb & 32, pYc, stepYc, coeffMB);
+                            mp4_AddResidual(cbpb & 16, pYc+8, stepYc, coeffMB+64);
+                            mp4_AddResidual(cbpb & 8, pYc+stepYc*8, stepYc, coeffMB+128);
+                            mp4_AddResidual(cbpb & 4, pYc+stepYc*8+8, stepYc, coeffMB+192);
+                        } else {
+                            mp4_AddResidual(cbpb & 32, pYc, stepYc*2, coeffMB);
+                            mp4_AddResidual(cbpb & 16, pYc+8, stepYc*2, coeffMB+64);
+                            mp4_AddResidual(cbpb & 8, pYc+stepYc, stepYc*2, coeffMB+128);
+                            mp4_AddResidual(cbpb & 4, pYc+stepYc+8, stepYc*2, coeffMB+192);
+                        }
+                        if (!field_prediction) {
+                            mp4_MC_HP(cbpb & 2, pCbn, stepCbn, pCbc, stepCbc, coeffMB+256, &mvCbCrB, 0);
+                            mp4_MC_HP(cbpb & 1, pCrn, stepCrn, pCrc, stepCrc, coeffMB+320, &mvCbCrB, 0);
+                        } else {
+                            mp4_Copy8x4HP_8u(pCbn+(mb_btfr ? stepCbn : 0), stepCbn*2, pCbc, stepCbc*2, &mvCbCrBFT, 0);
+                            mp4_Copy8x4HP_8u(pCrn+(mb_btfr ? stepCrn : 0), stepCrn*2, pCrc, stepCrc*2, &mvCbCrBFT, 0);
+                            mp4_Copy8x4HP_8u(pCbn+(mb_bbfr ? stepCbn : 0), stepCbn*2, pCbc+stepCbc, stepCbc*2, &mvCbCrBFB, 0);
+                            mp4_Copy8x4HP_8u(pCrn+(mb_bbfr ? stepCrn : 0), stepCrn*2, pCrc+stepCrc, stepCrc*2, &mvCbCrBFB, 0);
+                            mp4_AddResidual(cbpb & 2, pCbc, stepCbc, coeffMB+256);
+                            mp4_AddResidual(cbpb & 1, pCrc, stepCrc, coeffMB+320);
+                        }
+                    } else if (mb_type == IPPVC_MBTYPE_INTERPOLATE) {
+                        mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_INTERPOLATE);
+                        if (!field_prediction) {
+                            if (mp4_DecodeMV(pInfo, &mvForwT, fcode_forward) != MP4_STATUS_OK)
+                                goto Err_1;
+                            if (mp4_DecodeMV(pInfo, &mvBackT, fcode_backward) != MP4_STATUS_OK)
+                                goto Err_1;
+                            if (quarter_sample) {
+                                mp4_LimitMVQ(&mvForwT, &mvForw[0], &limitRectL, dx, dy, 16);
+                                mp4_ComputeChromaMVQ(&mvForw[0], &mvCbCrF);
+                                mp4_Copy16x16QP_8u(pYp, stepYp, pYc, stepYc, &mvForw[0], 0);
+                                mp4_LimitMVQ(&mvBackT, &mvBack[0], &limitRectL, dx, dy, 16);
+                                mp4_ComputeChromaMVQ(&mvBack[0], &mvCbCrB);
+                                mp4_Copy16x16QP_8u(pYn, stepYn, tmpMB, 16, &mvBack[0], 0);
+                            } else {
+                                mp4_LimitMV(&mvForwT, &mvForw[0], &limitRectL, dx, dy, 16);
+                                mp4_ComputeChromaMV(&mvForw[0], &mvCbCrF);
+                                mp4_Copy16x16HP_8u(pYp, stepYp, pYc, stepYc, &mvForw[0], 0);
+                                mp4_LimitMV(&mvBackT, &mvBack[0], &limitRectL, dx, dy, 16);
+                                mp4_ComputeChromaMV(&mvBack[0], &mvCbCrB);
+                                mp4_Copy16x16HP_8u(pYn, stepYn, tmpMB, 16, &mvBack[0], 0);
+                            }
+                            //mvForw[1] = mvForw[2] = mvForw[3] = mvForw[0];
+                            mvForwB = mvForwT;
+                            //mvBack[1] = mvBack[2] = mvBack[3] = mvBack[0];
+                            mvBackB = mvBackT;
+                        } else {
+                            mvForwT.dy = (int16_t)mp4_Div2(mvForwT.dy);
+                            if (mp4_DecodeMV(pInfo, &mvForwT, fcode_forward) != MP4_STATUS_OK)
+                                goto Err_1;
+                            mvForwB.dy = (int16_t)mp4_Div2(mvForwB.dy);
+                            if (mp4_DecodeMV(pInfo, &mvForwB, fcode_forward) != MP4_STATUS_OK)
+                                goto Err_1;
+                            mvBackT.dy = (int16_t)mp4_Div2(mvBackT.dy);
+                            if (mp4_DecodeMV(pInfo, &mvBackT, fcode_backward) != MP4_STATUS_OK)
+                                goto Err_1;
+                            mvBackB.dy = (int16_t)mp4_Div2(mvBackB.dy);
+                            if (mp4_DecodeMV(pInfo, &mvBackB, fcode_backward) != MP4_STATUS_OK)
+                                goto Err_1;
+                            if (quarter_sample) {
+                                mp4_LimitFMVQ(&mvForwT, &mvForw[0], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8QP_8u(pYp+(mb_ftfr ? stepYp : 0), stepYp*2, pYc, stepYc*2, &mvForw[0], 0);
+                                mvForw[0].dx = (int16_t)mp4_Div2(mvForw[0].dx);
+                                mvForw[0].dy = (int16_t)(mp4_Div2(mvForw[0].dy*2) >> 1);
+                                mp4_LimitFMVQ(&mvForwB, &mvForw[2], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8QP_8u(pYp+(mb_fbfr ? stepYp : 0), stepYp*2, pYc+stepYc, stepYc*2, &mvForw[2], 0);
+                                mvForw[2].dx = (int16_t)mp4_Div2(mvForw[2].dx);
+                                mvForw[2].dy = (int16_t)(mp4_Div2(mvForw[2].dy*2) >> 1);
+                                mp4_LimitFMVQ(&mvBackT, &mvBack[0], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8QP_8u(pYn+(mb_btfr ? stepYn : 0), stepYn*2, tmpMB, 32, &mvBack[0], 0);
+                                mvBack[0].dx = (int16_t)mp4_Div2(mvBack[0].dx);
+                                mvBack[0].dy = (int16_t)(mp4_Div2(mvBack[0].dy*2) >> 1);
+                                mp4_LimitFMVQ(&mvBackB, &mvBack[2], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8QP_8u(pYn+(mb_bbfr ? stepYn : 0), stepYn*2, tmpMB+16, 32, &mvBack[2], 0);
+                                mvBack[2].dx = (int16_t)mp4_Div2(mvBack[2].dx);
+                                mvBack[2].dy = (int16_t)(mp4_Div2(mvBack[2].dy*2) >> 1);
+                            } else {
+                                mp4_LimitFMV(&mvForwT, &mvForw[0], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8HP_8u(pYp+(mb_ftfr ? stepYp : 0), stepYp*2, pYc, stepYc*2, &mvForw[0], 0);
+                                mp4_LimitFMV(&mvForwB, &mvForw[2], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8HP_8u(pYp+(mb_fbfr ? stepYp : 0), stepYp*2, pYc+stepYc, stepYc*2, &mvForw[2], 0);
+                                mp4_LimitFMV(&mvBackT, &mvBack[0], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8HP_8u(pYn+(mb_btfr ? stepYn : 0), stepYn*2, tmpMB, 32, &mvBack[0], 0);
+                                mp4_LimitFMV(&mvBackB, &mvBack[2], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8HP_8u(pYn+(mb_bbfr ? stepYn : 0), stepYn*2, tmpMB+16, 32, &mvBack[2], 0);
+                            }
+                            mvForwT.dy <<= 1;
+                            mvForwB.dy <<= 1;
+                            mvBackT.dy <<= 1;
+                            mvBackB.dy <<= 1;
+                            //mvForw[1] = mvForw[0];
+                            //mvForw[3] = mvForw[2];
+                            //mvBack[1] = mvBack[0];
+                            //mvBack[3] = mvBack[2];
+                            mp4_ComputeChromaMV(&mvForw[0], &mvCbCrFFT);
+                            mp4_ComputeChromaMV(&mvForw[2], &mvCbCrFFB);
+                            mp4_ComputeChromaMV(&mvBack[0], &mvCbCrBFT);
+                            mp4_ComputeChromaMV(&mvBack[2], &mvCbCrBFB);
+                        }
+                        ippiAverage16x16_8u_C1IR(tmpMB, 16, pYc, stepYc);
+                        if (mp4_DecodeInterMB(pInfo, coeffMB, quant, cbpb, scan) != MP4_STATUS_OK)
+                            goto Err_1;
+                        if (!dct_type) {
+                            mp4_AddResidual(cbpb & 32, pYc, stepYc, coeffMB);
+                            mp4_AddResidual(cbpb & 16, pYc+8, stepYc, coeffMB+64);
+                            mp4_AddResidual(cbpb & 8, pYc+stepYc*8, stepYc, coeffMB+128);
+                            mp4_AddResidual(cbpb & 4, pYc+stepYc*8+8, stepYc, coeffMB+192);
+                        } else {
+                            mp4_AddResidual(cbpb & 32, pYc, stepYc*2, coeffMB);
+                            mp4_AddResidual(cbpb & 16, pYc+8, stepYc*2, coeffMB+64);
+                            mp4_AddResidual(cbpb & 8, pYc+stepYc, stepYc*2, coeffMB+128);
+                            mp4_AddResidual(cbpb & 4, pYc+stepYc+8, stepYc*2, coeffMB+192);
+                        }
+                        if (!field_prediction) {
+                            mp4_Copy8x8HP_8u(pCbp, stepCbp, pCbc, stepCbc, &mvCbCrF, 0);
+                            mp4_Copy8x8HP_8u(pCrp, stepCrp, pCrc, stepCrc, &mvCbCrF, 0);
+                            mp4_Copy8x8HP_8u(pCbn, stepCbn, tmpMB, 8, &mvCbCrB, 0);
+                            mp4_Copy8x8HP_8u(pCrn, stepCrn, tmpMB+64, 8, &mvCbCrB, 0);
+                        } else {
+                            mp4_Copy8x4HP_8u(pCbp+(mb_ftfr ? stepCbp : 0), stepCbp*2, pCbc, stepCbc*2, &mvCbCrFFT, 0);
+                            mp4_Copy8x4HP_8u(pCrp+(mb_ftfr ? stepCrp : 0), stepCrp*2, pCrc, stepCrc*2, &mvCbCrFFT, 0);
+                            mp4_Copy8x4HP_8u(pCbp+(mb_fbfr ? stepCbp : 0), stepCbp*2, pCbc+stepCbc, stepCbc*2, &mvCbCrFFB, 0);
+                            mp4_Copy8x4HP_8u(pCrp+(mb_fbfr ? stepCrp : 0), stepCrp*2, pCrc+stepCrc, stepCrc*2, &mvCbCrFFB, 0);
+                            mp4_Copy8x4HP_8u(pCbn+(mb_btfr ? stepCbn : 0), stepCbn*2, tmpMB, 16, &mvCbCrBFT, 0);
+                            mp4_Copy8x4HP_8u(pCrn+(mb_btfr ? stepCrn : 0), stepCrn*2, tmpMB+64, 16, &mvCbCrBFT, 0);
+                            mp4_Copy8x4HP_8u(pCbn+(mb_bbfr ? stepCbn : 0), stepCbn*2, tmpMB+8, 16, &mvCbCrBFB, 0);
+                            mp4_Copy8x4HP_8u(pCrn+(mb_bbfr ? stepCrn : 0), stepCrn*2, tmpMB+64+8, 16, &mvCbCrBFB, 0);
+                        }
+                        ippiAverage8x8_8u_C1IR(tmpMB, 8, pCbc, stepCbc);
+                        ippiAverage8x8_8u_C1IR(tmpMB+64, 8, pCrc, stepCrc);
+                        mp4_AddResidual(cbpb & 2, pCbc, stepCbc, coeffMB+256);
+                        mp4_AddResidual(cbpb & 1, pCrc, stepCrc, coeffMB+320);
+                    } else { // IPPVC_MBTYPE_DIRECT
+                        mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_DIRECT);
+                        field_prediction = pMBinfo->field_info & 1;
+                        if (!field_prediction) {
+                            // frame direct mode
+                            if (mp4_DecodeMV_Direct(pInfo, pMBinfo->mv, mvForw, mvBack, TRB, TRD, modb, pMBinfo->type) != MP4_STATUS_OK)
+                                goto Err_1;
+                            if (quarter_sample) {
+                                mp4_ComputeChroma4MVQ(mvForw, &mvCbCrF);
+                                mp4_Limit4MVQ(mvForw, mvForw, &limitRectL, dx, dy, 8);
+                                mp4_ComputeChroma4MVQ(mvBack, &mvCbCrB);
+                                mp4_Limit4MVQ(mvBack, mvBack, &limitRectL, dx, dy, 8);
+                                pc = pYc;
+                                pr = pYp;
+                                pn = pYn;
+                                mp4_Copy8x8QP_8u(pr, stepYp, pc, stepYc, &mvForw[0], 0);
+                                mp4_Copy8x8QP_8u(pn, stepYn, tmpMB, 16, &mvBack[0], 0);
+                                mp4_Copy8x8QP_8u(pr+8, stepYp, pc+8, stepYc, &mvForw[1], 0);
+                                mp4_Copy8x8QP_8u(pn+8, stepYn, tmpMB+8, 16, &mvBack[1], 0);
+                                pc = pYc + stepYc * 8;
+                                pr = pYp + stepYp * 8;
+                                pn = pYn + stepYn * 8;
+                                mp4_Copy8x8QP_8u(pr, stepYp, pc, stepYc, &mvForw[2], 0);
+                                mp4_Copy8x8QP_8u(pn, stepYn, tmpMB+128, 16, &mvBack[2], 0);
+                                mp4_Copy8x8QP_8u(pr+8, stepYp, pc+8, stepYc, &mvForw[3], 0);
+                                mp4_Copy8x8QP_8u(pn+8, stepYn, tmpMB+136, 16, &mvBack[3], 0);
+                            } else {
+                                mp4_ComputeChroma4MV(mvForw, &mvCbCrF);
+                                mp4_Limit4MV(mvForw, mvForw, &limitRectL, dx, dy, 8);
+                                mp4_ComputeChroma4MV(mvBack, &mvCbCrB);
+                                mp4_Limit4MV(mvBack, mvBack, &limitRectL, dx, dy, 8);
+                                pc = pYc;
+                                pr = pYp;
+                                pn = pYn;
+                                mp4_Copy8x8HP_8u(pr, stepYp, pc, stepYc, &mvForw[0], 0);
+                                mp4_Copy8x8HP_8u(pn, stepYn, tmpMB, 16, &mvBack[0], 0);
+                                mp4_Copy8x8HP_8u(pr+8, stepYp, pc+8, stepYc, &mvForw[1], 0);
+                                mp4_Copy8x8HP_8u(pn+8, stepYn, tmpMB+8, 16, &mvBack[1], 0);
+                                pc = pYc + stepYc * 8;
+                                pr = pYp + stepYp * 8;
+                                pn = pYn + stepYn * 8;
+                                mp4_Copy8x8HP_8u(pr, stepYp, pc, stepYc, &mvForw[2], 0);
+                                mp4_Copy8x8HP_8u(pn, stepYn, tmpMB+128, 16, &mvBack[2], 0);
+                                mp4_Copy8x8HP_8u(pr+8, stepYp, pc+8, stepYc, &mvForw[3], 0);
+                                mp4_Copy8x8HP_8u(pn+8, stepYn, tmpMB+136, 16, &mvBack[3], 0);
+                            }
+                            mp4_LimitMV(&mvCbCrF, &mvCbCrF, &limitRectC, dx >> 1, dy >> 1, 8);
+                            mp4_LimitMV(&mvCbCrB, &mvCbCrB, &limitRectC, dx >> 1, dy >> 1, 8);
+                        } else {
+                            mb_ftfr = (pMBinfo->field_info >> 1) & 1;
+                            mb_fbfr = (pMBinfo->field_info >> 2) & 1;
+                            if (mp4_DecodeMV_DirectField(pInfo, mb_ftfr, mb_fbfr, &mvField[0], &mvField[1], &mvForw[0], &mvForw[2], &mvBack[0], &mvBack[2], TRB, TRD, modb) != MP4_STATUS_OK)
+                                goto Err_1;
+                            if (quarter_sample) {
+                                mp4_LimitFMVQ(&mvForw[0], &mvForw[0], &limitRectL, dx, dy, 16);
+                                mp4_LimitFMVQ(&mvForw[2], &mvForw[2], &limitRectL, dx, dy, 16);
+                                mp4_LimitFMVQ(&mvBack[0], &mvBack[0], &limitRectL, dx, dy, 16);
+                                mp4_LimitFMVQ(&mvBack[2], &mvBack[2], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8QP_8u(pYp+(mb_ftfr ? stepYp : 0), stepYp*2, pYc, stepYc*2, &mvForw[0], 0);
+                                mp4_Copy16x8QP_8u(pYp+(mb_fbfr ? stepYp : 0), stepYp*2, pYc+stepYc, stepYc*2, &mvForw[2], 0);
+                                mp4_Copy16x8QP_8u(pYn/*+stepYn*mb_btfr*/, stepYn*2, tmpMB, 32, &mvBack[0], 0);
+                                mp4_Copy16x8QP_8u(pYn+stepYn/**mb_bbfr*/, stepYn*2, tmpMB+16, 32, &mvBack[2], 0);
+                                mvForw[0].dx = (int16_t)mp4_Div2(mvForw[0].dx);
+                                mvForw[0].dy = (int16_t)(mp4_Div2(mvForw[0].dy*2) >> 1);
+                                mvForw[2].dx = (int16_t)mp4_Div2(mvForw[2].dx);
+                                mvForw[2].dy = (int16_t)(mp4_Div2(mvForw[2].dy*2) >> 1);
+                                mvBack[0].dx = (int16_t)mp4_Div2(mvBack[0].dx);
+                                mvBack[0].dy = (int16_t)(mp4_Div2(mvBack[0].dy*2) >> 1);
+                                mvBack[2].dx = (int16_t)mp4_Div2(mvBack[2].dx);
+                                mvBack[2].dy = (int16_t)(mp4_Div2(mvBack[2].dy*2) >> 1);
+                            } else {
+                                mp4_LimitFMV(&mvForw[0], &mvForw[0], &limitRectL, dx, dy, 16);
+                                mp4_LimitFMV(&mvForw[2], &mvForw[2], &limitRectL, dx, dy, 16);
+                                mp4_LimitFMV(&mvBack[0], &mvBack[0], &limitRectL, dx, dy, 16);
+                                mp4_LimitFMV(&mvBack[2], &mvBack[2], &limitRectL, dx, dy, 16);
+                                mp4_Copy16x8HP_8u(pYp+(mb_ftfr ? stepYp : 0), stepYp*2, pYc, stepYc*2, &mvForw[0], 0);
+                                mp4_Copy16x8HP_8u(pYp+(mb_fbfr ? stepYp : 0), stepYp*2, pYc+stepYc, stepYc*2, &mvForw[2], 0);
+                                mp4_Copy16x8HP_8u(pYn/*+stepYn*mb_btfr*/, stepYn*2, tmpMB, 32, &mvBack[0], 0);
+                                mp4_Copy16x8HP_8u(pYn+stepYn/**mb_bbfr*/, stepYn*2, tmpMB+16, 32, &mvBack[2], 0);
+                            }
+                            mp4_ComputeChromaMV(&mvForw[0], &mvCbCrFFT);
+                            mp4_ComputeChromaMV(&mvForw[2], &mvCbCrFFB);
+                            mp4_ComputeChromaMV(&mvBack[0], &mvCbCrBFT);
+                            mp4_ComputeChromaMV(&mvBack[2], &mvCbCrBFB);
+                        }
+                        ippiAverage16x16_8u_C1IR(tmpMB, 16, pYc, stepYc);
+                        if (mp4_DecodeInterMB(pInfo, coeffMB, quant, cbpb, scan) != MP4_STATUS_OK)
+                            goto Err_1;
+                        if (!dct_type) {
+                            mp4_AddResidual(cbpb & 32, pYc, stepYc, coeffMB);
+                            mp4_AddResidual(cbpb & 16, pYc+8, stepYc, coeffMB+64);
+                            mp4_AddResidual(cbpb & 8, pYc+stepYc*8, stepYc, coeffMB+128);
+                            mp4_AddResidual(cbpb & 4, pYc+stepYc*8+8, stepYc, coeffMB+192);
+                        } else {
+                            mp4_AddResidual(cbpb & 32, pYc, stepYc*2, coeffMB);
+                            mp4_AddResidual(cbpb & 16, pYc+8, stepYc*2, coeffMB+64);
+                            mp4_AddResidual(cbpb & 8, pYc+stepYc, stepYc*2, coeffMB+128);
+                            mp4_AddResidual(cbpb & 4, pYc+stepYc+8, stepYc*2, coeffMB+192);
+                        }
+                        if (!field_prediction) {
+                            mp4_Copy8x8HP_8u(pCbp, stepCbp, pCbc, stepCbc, &mvCbCrF, 0);
+                            mp4_Copy8x8HP_8u(pCrp, stepCrp, pCrc, stepCrc, &mvCbCrF, 0);
+                            mp4_Copy8x8HP_8u(pCbn, stepCbn, tmpMB, 8, &mvCbCrB, 0);
+                            mp4_Copy8x8HP_8u(pCrn, stepCrn, tmpMB+64, 8, &mvCbCrB, 0);
+                        } else {
+                            mp4_Copy8x4HP_8u(pCbp+(mb_ftfr ? stepCbp : 0), stepCbp*2, pCbc, stepCbc*2, &mvCbCrFFT, 0);
+                            mp4_Copy8x4HP_8u(pCrp+(mb_ftfr ? stepCrp : 0), stepCrp*2, pCrc, stepCrc*2, &mvCbCrFFT, 0);
+                            mp4_Copy8x4HP_8u(pCbp+(mb_fbfr ? stepCbp : 0), stepCbp*2, pCbc+stepCbc, stepCbc*2, &mvCbCrFFB, 0);
+                            mp4_Copy8x4HP_8u(pCrp+(mb_fbfr ? stepCrp : 0), stepCrp*2, pCrc+stepCrc, stepCrc*2, &mvCbCrFFB, 0);
+                            mp4_Copy8x4HP_8u(pCbn/*+(mb_btfr ? stepCbn : 0)*/, stepCbn*2, tmpMB, 16, &mvCbCrBFT, 0);
+                            mp4_Copy8x4HP_8u(pCrn/*+(mb_btfr ? stepCrn : 0)*/, stepCrn*2, tmpMB+64, 16, &mvCbCrBFT, 0);
+                            mp4_Copy8x4HP_8u(pCbn+/*(mb_bbfr ? */stepCbn/* : 0)*/, stepCbn*2, tmpMB+8, 16, &mvCbCrBFB, 0);
+                            mp4_Copy8x4HP_8u(pCrn+/*(mb_bbfr ? */stepCrn/* : 0)*/, stepCrn*2, tmpMB+64+8, 16, &mvCbCrBFB, 0);
+                        }
+                        ippiAverage8x8_8u_C1IR(tmpMB, 8, pCbc, stepCbc);
+                        ippiAverage8x8_8u_C1IR(tmpMB+64, 8, pCrc, stepCrc);
+                        mp4_AddResidual(cbpb & 2, pCbc, stepCbc, coeffMB+256);
+                        mp4_AddResidual(cbpb & 1, pCrc, stepCrc, coeffMB+320);
+                    }
+                }
+                //mbCurr ++;
+                mbInVideoPacket ++;
+                colNum ++;
+                pMBinfo ++;
+                mvField += 2;
+                if (colNum == mbPerRow) {
+                    colNum = 0;
+                    rowNum ++;
+                    if (rowNum == mbPerCol)
+                        return sts;
+                    pYc += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYc << 4) - stepYc;
+                    pCbc += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCbc << 3) - stepCbc;
+                    pCrc += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCrc << 3) - stepCrc;
+                    pYp += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYp << 4) - stepYp;
+                    pCbp += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCbp << 3) - stepCbp;
+                    pCrp += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCrp << 3) - stepCrp;
+                    pYn += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYn << 4) - stepYn;
+                    pCbn += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCbn << 3) - stepCbn;
+                    pCrn += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCrn << 3) - stepCrn;
+                    // reset MV predictors at new row
+                    mvForwT.dx = mvForwT.dy = mvBackT.dx = mvBackT.dy = mvForwB.dx = mvForwB.dy = mvBackB.dx = mvBackB.dy = 0;
+                } else {
+                    pYc += 16; pCrc += 8; pCbc += 8;
+                    pYp += 16; pCrp += 8; pCbp += 8;
+                    pYn += 16; pCrn += 8; pCbn += 8;
+                }
+                if (!pInfo->VisualObject.VideoObject.resync_marker_disable) {
+                    int32_t  found;
+ErrRet_1:
+                    if (mp4_CheckDecodeVideoPacket(pInfo, &found) == MP4_STATUS_OK) {
+                        if (found) {
+                            quant = pInfo->VisualObject.VideoObject.VideoObjectPlane.quant_scale;
+                            mbCurr = pInfo->VisualObject.VideoObject.VideoObjectPlane.macroblock_num;
+                            mp4_CopyMacroBlocks(pInfo->VisualObject.rFrame, pInfo->VisualObject.cFrame, mbPerRow, rowNum, colNum, mbCurr - rowNum * mbPerRow - colNum);
+                            rowNum = mbCurr / mbPerRow;
+                            colNum = mbCurr % mbPerRow;
+                            pYc = pInfo->VisualObject.cFrame->pY + (rowNum * stepYc + colNum) * 16; pCbc = pInfo->VisualObject.cFrame->pCb + (rowNum * stepCbc + colNum) * 8; pCrc = pInfo->VisualObject.cFrame->pCr + (rowNum * stepCrc + colNum) * 8;
+                            pYp = pInfo->VisualObject.rFrame->pY + (rowNum * stepYp + colNum) * 16; pCbp = pInfo->VisualObject.rFrame->pCb + (rowNum * stepCbp + colNum) * 8; pCrp = pInfo->VisualObject.rFrame->pCr + (rowNum * stepCrp + colNum) * 8;
+                            pYn = pInfo->VisualObject.nFrame->pY + (rowNum * stepYn + colNum) * 16; pCbn = pInfo->VisualObject.nFrame->pCb + (rowNum * stepCbn + colNum) * 8; pCrn = pInfo->VisualObject.nFrame->pCr + (rowNum * stepCrn + colNum) * 8;
+                            pMBinfo = pInfo->VisualObject.VideoObject.MBinfo + mbCurr;
+                            break;
+                        }
+                    } else
+                        goto Err_1;
+                }
+            }
+        }
+Err_1:
+        sts = MP4_STATUS_ERROR;
+        if (pInfo->stopOnErr)
+            return sts;
+        if (pInfo->VisualObject.VideoObject.resync_marker_disable || !mp4_SeekResyncMarker(pInfo)) 
+				{
+            mp4_CopyMacroBlocks(pInfo->VisualObject.rFrame, pInfo->VisualObject.cFrame, mbPerRow, rowNum, colNum,  pInfo->VisualObject.VideoObject.MacroBlockPerVOP - rowNum * mbPerRow - colNum);
+            return sts;
+        }
+        goto ErrRet_1;
+    }
+// decode usual B-VOP
+    for (;;) {
+        IppMotionVector mvCbCrF, mvCbCrB, mvForw, mvBack, mvForwLim, mvBackLim;
+
+        mbInVideoPacket = 0;
+        // reset MV predictors at new VideoPacket
+        mvForw.dx = mvForw.dy = mvBack.dx = mvBack.dy = 0;
+        // decode B-VOP macroblocks
+        for (;;) {
+            if (pMBinfo->not_coded) {
+                ippiCopy16x16_8u_C1R(pYp, stepYp, pYc, stepYc);
+                ippiCopy8x8_8u_C1R(pCbp, stepCbp, pCbc, stepCbc);
+                ippiCopy8x8_8u_C1R(pCrp, stepCrp, pCrc, stepCrc);
+                mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_NOTCODED);
+            } else {
+                cbpb = 0;
+                if (mp4_GetBit(pInfo)) {
+                    modb = 2;
+                    mb_type = IPPVC_MBTYPE_DIRECT;
+                } else {
+                    modb = mp4_GetBit(pInfo);
+                    // decode mb_type
+                    code = mp4_ShowBits9(pInfo, 4);
+                    if (code != 0) {
+                        mb_type = mp4_BVOPmb_type[code].code;
+                        mp4_FlushBits(pInfo, mp4_BVOPmb_type[code].len);
+                    } else {
+                        mp4_Error("Error when decode mb_type of B-VOP macroblock");
+                        goto Err_2;
+                    }
+                    if (modb == 0)
+                        cbpb = mp4_GetBits9(pInfo, 6);
+                    if (mb_type != IPPVC_MBTYPE_DIRECT && cbpb != 0)
+                        mp4_UpdateQuant_B(pInfo, quant);
+                }
+                // coordinates of current MB for limitation
+                dx = colNum * 16;
+                dy = rowNum * 16;
+                if (mb_type == IPPVC_MBTYPE_FORWARD) {
+                    mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_FORWARD);
+                    if (mp4_DecodeMV(pInfo, &mvForw, fcode_forward) != MP4_STATUS_OK)
+                        goto Err_2;
+                    if (quarter_sample) {
+                        mp4_LimitMVQ(&mvForw, &mvForwLim, &limitRectL, dx, dy, 16);
+                        mp4_ComputeChromaMVQ(&mvForwLim, &mvCbCrF);
+                        mp4_Copy16x16QP_8u(pYp, stepYp, pYc, stepYc, &mvForwLim, 0);
+                        mp4_DecodeReconBlockInter_MPEG4(cbpb & 32, pYc, stepYc, Err_2);
+                        mp4_DecodeReconBlockInter_MPEG4(cbpb & 16, pYc+8, stepYc, Err_2);
+                        mp4_DecodeReconBlockInter_MPEG4(cbpb & 8, pYc+8*stepYc, stepYc, Err_2);
+                        mp4_DecodeReconBlockInter_MPEG4(cbpb & 4, pYc+8*stepYc+8, stepYc, Err_2);
+                    } else {
+                        mp4_LimitMV(&mvForw, &mvForwLim, &limitRectL, dx, dy, 16);
+                        mp4_ComputeChromaMV(&mvForwLim, &mvCbCrF);
+                        if (cbpb & 60) {
+                            mp4_DecodeMCBlockInter_MPEG4(cbpb & 32, pYp, stepYp, pYc, stepYc, mvForwLim, 0, Err_2);
+                            mp4_DecodeMCBlockInter_MPEG4(cbpb & 16, pYp+8, stepYp, pYc+8, stepYc, mvForwLim, 0, Err_2);
+                            mp4_DecodeMCBlockInter_MPEG4(cbpb & 8, pYp+8*stepYp, stepYp, pYc+8*stepYc, stepYc, mvForwLim, 0, Err_2);
+                            mp4_DecodeMCBlockInter_MPEG4(cbpb & 4, pYp+8*stepYp+8, stepYp, pYc+8*stepYc+8, stepYc, mvForwLim, 0, Err_2);
+                        } else {
+                            mp4_Copy16x16HP_8u(pYp, stepYp, pYc, stepYc, &mvForwLim, 0);
+                            mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nB_INTER_NC);
+                            mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nB_INTER_NC);
+                            mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nB_INTER_NC);
+                            mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nB_INTER_NC);
+                        }
+                    }
+                    mp4_DecodeMCBlockInter_MPEG4(cbpb & 2, pCbp, stepCbp, pCbc, stepCbc, mvCbCrF, 0, Err_2);
+                    mp4_DecodeMCBlockInter_MPEG4(cbpb & 1, pCrp, stepCrp, pCrc, stepCrc, mvCbCrF, 0, Err_2);
+                } else if (mb_type == IPPVC_MBTYPE_BACKWARD) {
+                    mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_BACKWARD);
+                    if (mp4_DecodeMV(pInfo, &mvBack, fcode_backward) != MP4_STATUS_OK)
+                        goto Err_2;
+                    if (quarter_sample) {
+                        mp4_LimitMVQ(&mvBack, &mvBackLim, &limitRectL, dx, dy, 16);
+                        mp4_ComputeChromaMVQ(&mvBackLim, &mvCbCrB);
+                        mp4_Copy16x16QP_8u(pYn, stepYn, pYc, stepYc, &mvBackLim, 0);
+                        mp4_DecodeReconBlockInter_MPEG4(cbpb & 32, pYc, stepYc, Err_2);
+                        mp4_DecodeReconBlockInter_MPEG4(cbpb & 16, pYc+8, stepYc, Err_2);
+                        mp4_DecodeReconBlockInter_MPEG4(cbpb & 8, pYc+8*stepYc, stepYc, Err_2);
+                        mp4_DecodeReconBlockInter_MPEG4(cbpb & 4, pYc+8*stepYc+8, stepYc, Err_2);
+                    } else {
+                        mp4_LimitMV(&mvBack, &mvBackLim, &limitRectL, dx, dy, 16);
+                        mp4_ComputeChromaMV(&mvBackLim, &mvCbCrB);
+                        if (cbpb & 60) {
+                            mp4_DecodeMCBlockInter_MPEG4(cbpb & 32, pYn, stepYn, pYc, stepYc, mvBackLim, 0, Err_2);
+                            mp4_DecodeMCBlockInter_MPEG4(cbpb & 16, pYn+8, stepYn, pYc+8, stepYc, mvBackLim, 0, Err_2);
+                            mp4_DecodeMCBlockInter_MPEG4(cbpb & 8, pYn+8*stepYn, stepYp, pYc+8*stepYc, stepYc, mvBackLim, 0, Err_2);
+                            mp4_DecodeMCBlockInter_MPEG4(cbpb & 4, pYn+8*stepYn+8, stepYp, pYc+8*stepYc+8, stepYc, mvBackLim, 0, Err_2);
+                        } else {
+                            mp4_Copy16x16HP_8u(pYn, stepYn, pYc, stepYc, &mvBackLim, 0);
+                            mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nB_INTER_NC);
+                            mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nB_INTER_NC);
+                            mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nB_INTER_NC);
+                            mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nB_INTER_NC);
+                        }
+                    }
+                    mp4_DecodeMCBlockInter_MPEG4(cbpb & 2, pCbn, stepCbn, pCbc, stepCbc, mvCbCrB, 0, Err_2);
+                    mp4_DecodeMCBlockInter_MPEG4(cbpb & 1, pCrn, stepCrn, pCrc, stepCrc, mvCbCrB, 0, Err_2);
+                } 
+								else if (mb_type == IPPVC_MBTYPE_INTERPOLATE)
+								{
+                    mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_INTERPOLATE);
+                    if (mp4_DecodeMV(pInfo, &mvForw, fcode_forward) != MP4_STATUS_OK)
+                        goto Err_2;
+                    if (mp4_DecodeMV(pInfo, &mvBack, fcode_backward) != MP4_STATUS_OK)
+                        goto Err_2;
+                    if (quarter_sample)
+										{
+                        mp4_LimitMVQ(&mvForw, &mvForwLim, &limitRectL, dx, dy, 16);
+                        mp4_ComputeChromaMVQ(&mvForwLim, &mvCbCrF);
+                        mp4_Copy16x16QP_8u(pYp, stepYp, pYc, stepYc, &mvForwLim, 0);
+                        mp4_LimitMVQ(&mvBack, &mvBackLim, &limitRectL, dx, dy, 16);
+                        mp4_ComputeChromaMVQ(&mvBackLim, &mvCbCrB);
+                        mp4_Copy16x16QP_8u(pYn, stepYn, tmpMB, 16, &mvBackLim, 0);
+                    }
+										else
+										{
+                        mp4_LimitMV(&mvForw, &mvForwLim, &limitRectL, dx, dy, 16);
+                        mp4_ComputeChromaMV(&mvForwLim, &mvCbCrF);
+                        mp4_Copy16x16HP_8u(pYp, stepYp, pYc, stepYc, &mvForwLim, 0);
+                        mp4_LimitMV(&mvBack, &mvBackLim, &limitRectL, dx, dy, 16);
+                        mp4_ComputeChromaMV(&mvBackLim, &mvCbCrB);
+                        mp4_Copy16x16HP_8u(pYn, stepYn, tmpMB, 16, &mvBackLim, 0);
+                    }
+                    ippiAverage16x16_8u_C1IR(tmpMB, 16, pYc, stepYc);
+                    mp4_DecodeReconBlockInter_MPEG4(cbpb & 32, pYc, stepYc, Err_2);
+                    mp4_DecodeReconBlockInter_MPEG4(cbpb & 16, pYc+8, stepYc, Err_2);
+                    mp4_DecodeReconBlockInter_MPEG4(cbpb & 8, pYc+8*stepYc, stepYc, Err_2);
+                    mp4_DecodeReconBlockInter_MPEG4(cbpb & 4, pYc+8*stepYc+8, stepYc, Err_2);
+                    mp4_Copy8x8HP_8u(pCbp, stepCbp, pCbc, stepCbc, &mvCbCrF, 0);
+                    mp4_Copy8x8HP_8u(pCbn, stepCbn, tmpMB, 8, &mvCbCrB, 0);
+                    ippiAverage8x8_8u_C1IR(tmpMB, 8, pCbc, stepCbc);
+                    mp4_DecodeReconBlockInter_MPEG4(cbpb & 2, pCbc, stepCbc, Err_2);
+                    mp4_Copy8x8HP_8u(pCrp, stepCrp, pCrc, stepCrc, &mvCbCrF, 0);
+                    mp4_Copy8x8HP_8u(pCrn, stepCrn, tmpMB, 8, &mvCbCrB, 0);
+                    ippiAverage8x8_8u_C1IR(tmpMB, 8, pCrc, stepCrc);
+                    mp4_DecodeReconBlockInter_MPEG4(cbpb & 1, pCrc, stepCrc, Err_2);
+                }
+								else 
+								{ // IPPVC_MBTYPE_DIRECT
+                    IppMotionVector mvForw[4], mvBack[4], mvForwLim[4], mvBackLim[4];
+
+                    mp4_StatisticInc_(&pInfo->VisualObject.Statistic.nMB_DIRECT);
+                    //f MVs of collocated block of recently decoded I or P frame used in Direct mode
+                    if (mp4_DecodeMV_Direct(pInfo, pMBinfo->mv, mvForw, mvBack, TRB, TRD, modb, pMBinfo->type) != MP4_STATUS_OK)
+                        goto Err_2;
+                    if (quarter_sample)
+										{
+                        mp4_Limit4MVQ(mvForw, mvForwLim, &limitRectL, dx, dy, 8);
+                        mp4_ComputeChroma4MVQ(mvForw, &mvCbCrF);
+                        mp4_Limit4MVQ(mvBack, mvBackLim, &limitRectL, dx, dy, 8);
+                        mp4_ComputeChroma4MVQ(mvBack, &mvCbCrB);
+                        mp4_Copy8x8QP_8u(pYp, stepYp, pYc, stepYc, &mvForwLim[0], 0);
+                        mp4_Copy8x8QP_8u(pYn, stepYn, tmpMB, 16, &mvBackLim[0], 0);
+                        mp4_Copy8x8QP_8u(pYp+8, stepYp, pYc+8, stepYc, &mvForwLim[1], 0);
+                        mp4_Copy8x8QP_8u(pYn+8, stepYn, tmpMB+8, 16, &mvBackLim[1], 0);
+                        mp4_Copy8x8QP_8u(pYp+8*stepYp, stepYp, pYc+8*stepYc, stepYc, &mvForwLim[2], 0);
+                        mp4_Copy8x8QP_8u(pYn+8*stepYn, stepYn, tmpMB+8*16, 16, &mvBackLim[2], 0);
+                        mp4_Copy8x8QP_8u(pYp+8*stepYp+8, stepYp, pYc+8*stepYc+8, stepYc, &mvForwLim[3], 0);
+                        mp4_Copy8x8QP_8u(pYn+8*stepYn+8, stepYn, tmpMB+8*16+8, 16, &mvBackLim[3], 0);
+                    } 
+										else 
+										{
+                        if (pMBinfo->type == IPPVC_MBTYPE_INTER4V) {
+                            mp4_Limit4MV(mvForw, mvForwLim, &limitRectL, dx, dy, 8);
+                            mp4_ComputeChroma4MV(mvForw, &mvCbCrF);
+                            mp4_Limit4MV(mvBack, mvBackLim, &limitRectL, dx, dy, 8);
+                            mp4_ComputeChroma4MV(mvBack, &mvCbCrB);
+                            mp4_Copy8x8HP_8u(pYp, stepYp, pYc, stepYc, &mvForwLim[0], 0);
+                            mp4_Copy8x8HP_8u(pYn, stepYn, tmpMB, 16, &mvBackLim[0], 0);
+                            mp4_Copy8x8HP_8u(pYp+8, stepYp, pYc+8, stepYc, &mvForwLim[1], 0);
+                            mp4_Copy8x8HP_8u(pYn+8, stepYn, tmpMB+8, 16, &mvBackLim[1], 0);
+                            mp4_Copy8x8HP_8u(pYp+8*stepYp, stepYp, pYc+8*stepYc, stepYc, &mvForwLim[2], 0);
+                            mp4_Copy8x8HP_8u(pYn+8*stepYn, stepYn, tmpMB+8*16, 16, &mvBackLim[2], 0);
+                            mp4_Copy8x8HP_8u(pYp+8*stepYp+8, stepYp, pYc+8*stepYc+8, stepYc, &mvForwLim[3], 0);
+                            mp4_Copy8x8HP_8u(pYn+8*stepYn+8, stepYn, tmpMB+8*16+8, 16, &mvBackLim[3], 0);
+                        } 
+												else 
+												{
+                            mp4_LimitMV(mvForw, mvForwLim, &limitRectL, dx, dy, 16);
+                            mp4_ComputeChromaMV(mvForwLim, &mvCbCrF);
+                            mp4_LimitMV(mvBack, mvBackLim, &limitRectL, dx, dy, 16);
+                            mp4_ComputeChromaMV(mvBackLim, &mvCbCrB);
+                            mp4_Copy16x16HP_8u(pYp, stepYp, pYc, stepYc, &mvForwLim[0], 0);
+                            mp4_Copy16x16HP_8u(pYn, stepYn, tmpMB, 16, &mvBackLim[0], 0);
+                        }
+                    }
+                    ippiAverage16x16_8u_C1IR(tmpMB, 16, pYc, stepYc);
+                    mp4_DecodeReconBlockInter_MPEG4(cbpb & 32, pYc, stepYc, Err_2);
+                    mp4_DecodeReconBlockInter_MPEG4(cbpb & 16, pYc+8, stepYc, Err_2);
+                    mp4_DecodeReconBlockInter_MPEG4(cbpb & 8, pYc+8*stepYc, stepYc, Err_2);
+                    mp4_DecodeReconBlockInter_MPEG4(cbpb & 4, pYc+8*stepYc+8, stepYc, Err_2);
+                    mp4_LimitMV(&mvCbCrF, &mvCbCrF, &limitRectC, dx >> 1, dy >> 1, 8);
+                    mp4_LimitMV(&mvCbCrB, &mvCbCrB, &limitRectC, dx >> 1, dy >> 1, 8);
+                    mp4_Copy8x8HP_8u(pCbp, stepCbp, pCbc, stepCbc, &mvCbCrF, 0);
+                    mp4_Copy8x8HP_8u(pCbn, stepCbn, tmpMB, 8, &mvCbCrB, 0);
+                    ippiAverage8x8_8u_C1IR(tmpMB, 8, pCbc, stepCbc);
+                    mp4_DecodeReconBlockInter_MPEG4(cbpb & 2, pCbc, stepCbc, Err_2);
+                    mp4_Copy8x8HP_8u(pCrp, stepCrp, pCrc, stepCrc, &mvCbCrF, 0);
+                    mp4_Copy8x8HP_8u(pCrn, stepCrn, tmpMB, 8, &mvCbCrB, 0);
+                    ippiAverage8x8_8u_C1IR(tmpMB, 8, pCrc, stepCrc);
+                    mp4_DecodeReconBlockInter_MPEG4(cbpb & 1, pCrc, stepCrc, Err_2);
+                }
+            }
+            //mbCurr ++;
+            mbInVideoPacket ++;
+            colNum ++;
+            pMBinfo ++;
+            if (colNum == mbPerRow)
+						{
+                colNum = 0;
+                rowNum ++;
+                if (rowNum == mbPerCol)
+                    return sts;
+                pYc += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYc << 4) - stepYc;
+                pCbc += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCbc << 3) - stepCbc;
+                pCrc += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCrc << 3) - stepCrc;
+                pYp += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYp << 4) - stepYp;
+                pCbp += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCbp << 3) - stepCbp;
+                pCrp += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCrp << 3) - stepCrp;
+                pYn += (2 * MP4_NUM_EXT_MB + 1) * 16 + (stepYn << 4) - stepYn;
+                pCbn += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCbn << 3) - stepCbn;
+                pCrn += (2 * MP4_NUM_EXT_MB + 1) * 8 + (stepCrn << 3) - stepCrn;
+                // reset MV predictors at new row
+                mvForw.dx = mvForw.dy = mvBack.dx = mvBack.dy = 0;
+            } 
+						else 
+						{
+                pYc += 16; pCrc += 8; pCbc += 8;
+                pYp += 16; pCrp += 8; pCbp += 8;
+                pYn += 16; pCrn += 8; pCbn += 8;
+            }
+            if (!pInfo->VisualObject.VideoObject.resync_marker_disable)
+						{
+                int32_t  found;
+ErrRet_2:
+                if (mp4_CheckDecodeVideoPacket(pInfo, &found) == MP4_STATUS_OK) 
+								{
+                    if (found) 
+										{
+                        quant = pInfo->VisualObject.VideoObject.VideoObjectPlane.quant_scale;
+                        mbCurr = pInfo->VisualObject.VideoObject.VideoObjectPlane.macroblock_num;
+                        mp4_CopyMacroBlocks(pInfo->VisualObject.rFrame, pInfo->VisualObject.cFrame, mbPerRow, rowNum, colNum, mbCurr - rowNum * mbPerRow - colNum);
+                        rowNum = mbCurr / mbPerRow;
+                        colNum = mbCurr % mbPerRow;
+                        pYc = pInfo->VisualObject.cFrame->pY + (rowNum * stepYc + colNum) * 16; pCbc = pInfo->VisualObject.cFrame->pCb + (rowNum * stepCbc + colNum) * 8; pCrc = pInfo->VisualObject.cFrame->pCr + (rowNum * stepCrc + colNum) * 8;
+                        pYp = pInfo->VisualObject.rFrame->pY + (rowNum * stepYp + colNum) * 16; pCbp = pInfo->VisualObject.rFrame->pCb + (rowNum * stepCbp + colNum) * 8; pCrp = pInfo->VisualObject.rFrame->pCr + (rowNum * stepCrp + colNum) * 8;
+                        pYn = pInfo->VisualObject.nFrame->pY + (rowNum * stepYn + colNum) * 16; pCbn = pInfo->VisualObject.nFrame->pCb + (rowNum * stepCbn + colNum) * 8; pCrn = pInfo->VisualObject.nFrame->pCr + (rowNum * stepCrn + colNum) * 8;
+                        pMBinfo = pInfo->VisualObject.VideoObject.MBinfo + mbCurr;
+                        break;
+                    }
+                }
+								else
+                    goto Err_2;
+            }
+        }
+    }
+Err_2:
+    sts = MP4_STATUS_ERROR;
+    if (pInfo->stopOnErr)
+        return sts;
+    if (pInfo->VisualObject.VideoObject.resync_marker_disable || !mp4_SeekResyncMarker(pInfo)) 
+		{
+        mp4_CopyMacroBlocks(pInfo->VisualObject.rFrame, pInfo->VisualObject.cFrame, mbPerRow, rowNum, colNum,  pInfo->VisualObject.VideoObject.MacroBlockPerVOP - rowNum * mbPerRow - colNum);
+        return sts;
+    }
+    goto ErrRet_2;
+}
+