/*
 INTEL CONFIDENTIAL
 Copyright 2011 Intel Corporation All Rights Reserved.
 The source code contained or described herein and all documents related to the source code ("Material") are owned by Intel Corporation or its suppliers or licensors. Title to the Material remains with Intel Corporation or its suppliers and licensors. The Material contains trade secrets and proprietary and confidential information of Intel or its suppliers and licensors. The Material is protected by worldwide copyright and trade secret laws and treaty provisions. No part of the Material may be used, copied, reproduced, modified, published, uploaded, posted, transmitted, distributed, or disclosed in any way without Intel’s prior express written permission.

 No license under any patent, copyright, trade secret or other intellectual property right is granted to or conferred upon you by disclosure or delivery of the Materials, either expressly, by implication, inducement, estoppel or otherwise. Any license under such intellectual property rights must be express and approved by Intel in writing.
 */

#include <string.h>
#include <stdlib.h>
#include "VideoEncoderLog.h"
#include "VideoEncoderAVC.h"
#include <va/va_tpi.h>
#include <va/va_enc_h264.h>
#include <bitstream.h>

VideoEncoderAVC::VideoEncoderAVC()
    :VideoEncoderBase() {
    if(VideoEncoderBase::queryProfileLevelConfig(mVADisplay, VAProfileH264High) == ENCODE_SUCCESS){
        mComParams.profile = VAProfileH264High;
        mComParams.level = 42;
    }else if(VideoEncoderBase::queryProfileLevelConfig(mVADisplay, VAProfileH264Main) == ENCODE_SUCCESS){
        mComParams.profile = VAProfileH264Main;
        mComParams.level = 41;
    }
    mVideoParamsAVC.basicUnitSize = 0;
    mVideoParamsAVC.VUIFlag = 0;
    mVideoParamsAVC.sliceNum.iSliceNum = 2;
    mVideoParamsAVC.sliceNum.pSliceNum = 2;
    mVideoParamsAVC.idrInterval = 2;
    mVideoParamsAVC.ipPeriod = 1;
    mVideoParamsAVC.maxSliceSize = 0;
    mVideoParamsAVC.delimiterType = AVC_DELIMITER_ANNEXB;
    mSliceNum = 2;
    mVideoParamsAVC.crop.LeftOffset = 0;
    mVideoParamsAVC.crop.RightOffset = 0;
    mVideoParamsAVC.crop.TopOffset = 0;
    mVideoParamsAVC.crop.BottomOffset = 0;
    mVideoParamsAVC.SAR.SarWidth = 0;
    mVideoParamsAVC.SAR.SarHeight = 0;
    mVideoParamsAVC.bEntropyCodingCABAC = 0;
    mVideoParamsAVC.bWeightedPPrediction = 0;
    mVideoParamsAVC.bDirect8x8Inference = 0;
    mVideoParamsAVC.bConstIpred = 0;
    mAutoReferenceSurfaceNum = 4;

    packed_seq_header_param_buf_id = VA_INVALID_ID;
    packed_seq_buf_id = VA_INVALID_ID;
    packed_pic_header_param_buf_id = VA_INVALID_ID;
    packed_pic_buf_id = VA_INVALID_ID;
    packed_sei_header_param_buf_id = VA_INVALID_ID;   /* the SEI buffer */
    packed_sei_buf_id = VA_INVALID_ID;
}

Encode_Status VideoEncoderAVC::start() {

    Encode_Status ret = ENCODE_SUCCESS;
    LOG_V( "Begin\n");

    if (mComParams.rcMode == VA_RC_VCM) {
        // If we are in VCM, we will set slice num to max value
        // mVideoParamsAVC.sliceNum.iSliceNum = (mComParams.resolution.height + 15) / 16;
        // mVideoParamsAVC.sliceNum.pSliceNum = mVideoParamsAVC.sliceNum.iSliceNum;
    }

    ret = VideoEncoderBase::start ();
    CHECK_ENCODE_STATUS_RETURN("VideoEncoderBase::start");

    LOG_V( "end\n");
    return ret;
}

Encode_Status VideoEncoderAVC::derivedSetParams(VideoParamConfigSet *videoEncParams) {

    CHECK_NULL_RETURN_IFFAIL(videoEncParams);
    VideoParamsAVC *encParamsAVC = reinterpret_cast <VideoParamsAVC *> (videoEncParams);

    // AVC parames
    if (encParamsAVC->size != sizeof (VideoParamsAVC)) {
        return ENCODE_INVALID_PARAMS;
    }

    if(encParamsAVC->ipPeriod == 0 || encParamsAVC->ipPeriod >4)
        return ENCODE_INVALID_PARAMS;

    if((mComParams.intraPeriod >1)&&(mComParams.intraPeriod % encParamsAVC->ipPeriod !=0))
        return ENCODE_INVALID_PARAMS;

    mVideoParamsAVC = *encParamsAVC;
    if(mComParams.profile == VAProfileH264Baseline){
        mVideoParamsAVC.bEntropyCodingCABAC = 0;
        mVideoParamsAVC.bDirect8x8Inference = 0;
        mVideoParamsAVC.bWeightedPPrediction = 0;
    }
    return ENCODE_SUCCESS;
}

Encode_Status VideoEncoderAVC:: derivedGetParams(VideoParamConfigSet *videoEncParams) {

    CHECK_NULL_RETURN_IFFAIL(videoEncParams);
    VideoParamsAVC *encParamsAVC = reinterpret_cast <VideoParamsAVC *> (videoEncParams);

    // AVC parames
    if (encParamsAVC->size != sizeof (VideoParamsAVC)) {
        return ENCODE_INVALID_PARAMS;
    }

    *encParamsAVC = mVideoParamsAVC;
    return ENCODE_SUCCESS;

}

Encode_Status VideoEncoderAVC::derivedSetConfig(VideoParamConfigSet *videoEncConfig) {

    CHECK_NULL_RETURN_IFFAIL(videoEncConfig);
    LOG_I("Config type = %d\n", (int)videoEncConfig->type);

    switch (videoEncConfig->type) {
        case VideoConfigTypeAVCIntraPeriod: {

            VideoConfigAVCIntraPeriod *configAVCIntraPeriod =
                    reinterpret_cast <VideoConfigAVCIntraPeriod *> (videoEncConfig);
            // Config Intra Peroid
            if (configAVCIntraPeriod->size != sizeof (VideoConfigAVCIntraPeriod)) {
                return ENCODE_INVALID_PARAMS;
            }

            if(configAVCIntraPeriod->ipPeriod == 0 || configAVCIntraPeriod->ipPeriod >4)
                return ENCODE_INVALID_PARAMS;
            if((configAVCIntraPeriod->intraPeriod >1)&&(configAVCIntraPeriod->intraPeriod % configAVCIntraPeriod->ipPeriod !=0))
                return ENCODE_INVALID_PARAMS;

            mVideoParamsAVC.idrInterval = configAVCIntraPeriod->idrInterval;
            mVideoParamsAVC.ipPeriod = configAVCIntraPeriod->ipPeriod;
            mComParams.intraPeriod = configAVCIntraPeriod->intraPeriod;
            mNewHeader = true;
            break;
        }
        case VideoConfigTypeNALSize: {
            // Config MTU
            VideoConfigNALSize *configNALSize =
                    reinterpret_cast <VideoConfigNALSize *> (videoEncConfig);
            if (configNALSize->size != sizeof (VideoConfigNALSize)) {
                return ENCODE_INVALID_PARAMS;
            }

            mVideoParamsAVC.maxSliceSize = configNALSize->maxSliceSize;
            mRenderMaxSliceSize = true;
            break;
        }
        case VideoConfigTypeIDRRequest: {

            mNewHeader = true;
            break;
        }
        case VideoConfigTypeSliceNum: {

            VideoConfigSliceNum *configSliceNum =
                    reinterpret_cast <VideoConfigSliceNum *> (videoEncConfig);
            // Config Slice size
            if (configSliceNum->size != sizeof (VideoConfigSliceNum)) {
                return ENCODE_INVALID_PARAMS;
            }

            mVideoParamsAVC.sliceNum = configSliceNum->sliceNum;
            break;
        }
        default: {
            LOG_E ("Invalid Config Type");
            break;
        }
    }

    return ENCODE_SUCCESS;
}

Encode_Status VideoEncoderAVC:: derivedGetConfig(
        VideoParamConfigSet *videoEncConfig) {

    CHECK_NULL_RETURN_IFFAIL(videoEncConfig);
    LOG_I("Config type = %d\n", (int)videoEncConfig->type);

    switch (videoEncConfig->type) {

        case VideoConfigTypeAVCIntraPeriod: {

            VideoConfigAVCIntraPeriod *configAVCIntraPeriod =
                    reinterpret_cast <VideoConfigAVCIntraPeriod *> (videoEncConfig);
            if (configAVCIntraPeriod->size != sizeof (VideoConfigAVCIntraPeriod)) {
                return ENCODE_INVALID_PARAMS;
            }

            configAVCIntraPeriod->idrInterval = mVideoParamsAVC.idrInterval;
            configAVCIntraPeriod->intraPeriod = mComParams.intraPeriod;
            configAVCIntraPeriod->ipPeriod = mVideoParamsAVC.ipPeriod;

            break;
        }
        case VideoConfigTypeNALSize: {

            VideoConfigNALSize *configNALSize =
                    reinterpret_cast <VideoConfigNALSize *> (videoEncConfig);
            if (configNALSize->size != sizeof (VideoConfigNALSize)) {
                return ENCODE_INVALID_PARAMS;
            }

            configNALSize->maxSliceSize = mVideoParamsAVC.maxSliceSize;
            break;
        }
        case VideoConfigTypeIDRRequest: {
            break;

        }
        case VideoConfigTypeSliceNum: {

            VideoConfigSliceNum *configSliceNum =
                    reinterpret_cast <VideoConfigSliceNum *> (videoEncConfig);
            if (configSliceNum->size != sizeof (VideoConfigSliceNum)) {
                return ENCODE_INVALID_PARAMS;
            }

            configSliceNum->sliceNum = mVideoParamsAVC.sliceNum;
            break;
        }
        default: {
            LOG_E ("Invalid Config Type");
            break;
        }
    }

    return ENCODE_SUCCESS;
}

Encode_Status VideoEncoderAVC::updateFrameInfo(EncodeTask* task) {
    uint32_t idrPeroid = mComParams.intraPeriod * mVideoParamsAVC.idrInterval;
    FrameType frametype;
    uint32_t frame_num = mFrameNum;
    uint32_t intraPeriod = mComParams.intraPeriod;

    if (idrPeroid != 0) {
        if(mVideoParamsAVC.ipPeriod > 1)
            frame_num = frame_num % (idrPeroid + 1);
        else
            frame_num = frame_num % idrPeroid ;
    }else{
        if (mComParams.intraPeriod == 0)
            intraPeriod = 0xFFFFFFFF;
    }


    if(frame_num ==0){
        frametype = FTYPE_IDR;
    }else if(intraPeriod ==1)
        // only I frame need intraPeriod=idrInterval=ipPeriod=0
        frametype = FTYPE_I;
    else if(mVideoParamsAVC.ipPeriod == 1){ // no B frame
        if((frame_num >  1) &&((frame_num -1)%intraPeriod == 0))
            frametype = FTYPE_I;
        else
            frametype = FTYPE_P;
    } else {
        if(((frame_num-1)%intraPeriod == 0)&&(frame_num >intraPeriod))
            frametype = FTYPE_I;
        else{
            frame_num = frame_num%intraPeriod;
            if(frame_num == 0)
                frametype = FTYPE_B;
            else if((frame_num-1)%mVideoParamsAVC.ipPeriod == 0)
                frametype = FTYPE_P;
            else
                frametype = FTYPE_B;
        }
    }

    if (frametype == FTYPE_IDR || frametype == FTYPE_I)
        task->flag |= ENCODE_BUFFERFLAG_SYNCFRAME;

    if (frametype != task->type) {
        const char* FrameTypeStr[10] = {"UNKNOWN", "I", "P", "B", "SI", "SP", "EI", "EP", "S", "IDR"};
        if ((uint32_t) task->type < 9)
            LOG_V("libMIX thinks it is %s Frame, the input is %s Frame", FrameTypeStr[frametype], FrameTypeStr[task->type]);
        else
            LOG_V("Wrong Frame type %d, type may not be initialized ?\n", task->type);
    }

//temparily comment out to avoid uninitialize error
//    if (task->type == FTYPE_UNKNOWN || (uint32_t) task->type > 9)
        task->type = frametype;

    return ENCODE_SUCCESS;
}

Encode_Status VideoEncoderAVC::getExtFormatOutput(VideoEncOutputBuffer *outBuffer) {

    Encode_Status ret = ENCODE_SUCCESS;

    LOG_V("Begin\n");

    switch (outBuffer->format) {
        case OUTPUT_CODEC_DATA: {
            // Output the codec data
            ret = outputCodecData(outBuffer);
            CHECK_ENCODE_STATUS_CLEANUP("outputCodecData");
            break;
        }

        case OUTPUT_ONE_NAL: {
            // Output only one NAL unit
            ret = outputOneNALU(outBuffer, true);
            CHECK_ENCODE_STATUS_CLEANUP("outputOneNALU");
            break;
        }

        case OUTPUT_ONE_NAL_WITHOUT_STARTCODE: {
            ret = outputOneNALU(outBuffer, false);
            CHECK_ENCODE_STATUS_CLEANUP("outputOneNALU");
            break;
        }

        case OUTPUT_LENGTH_PREFIXED: {
            // Output length prefixed
            ret = outputLengthPrefixed(outBuffer);
            CHECK_ENCODE_STATUS_CLEANUP("outputLengthPrefixed");
            break;
        }

        default:
            LOG_E("Invalid buffer mode\n");
            ret = ENCODE_FAIL;
            break;
    }

    LOG_I("out size is = %d\n", outBuffer->dataSize);


CLEAN_UP:


    LOG_V("End\n");
    return ret;
}

Encode_Status VideoEncoderAVC::getOneNALUnit(
        uint8_t *inBuffer, uint32_t bufSize, uint32_t *nalSize,
        uint32_t *nalType, uint32_t *nalOffset, uint32_t status) {
    uint32_t pos = 0;
    uint32_t zeroByteCount = 0;
    uint32_t singleByteTable[3][2] = {{1,0},{2,0},{2,3}};
    uint32_t dataRemaining = 0;
    uint8_t *dataPtr;

    // Don't need to check parameters here as we just checked by caller
    while ((inBuffer[pos++] == 0x00)) {
        zeroByteCount ++;
        if (pos >= bufSize)  //to make sure the buffer to be accessed is valid
            break;
    }

    if (inBuffer[pos - 1] != 0x01 || zeroByteCount < 2) {
        LOG_E("The stream is not AnnexB format \n");
        LOG_E("segment status is %x \n", status);
        return ENCODE_FAIL; //not AnnexB, we won't process it
    }

    *nalType = (*(inBuffer + pos)) & 0x1F;
    LOG_I ("NAL type = 0x%x\n", *nalType);

    zeroByteCount = 0;
    *nalOffset = pos;

    if (status & VA_CODED_BUF_STATUS_SINGLE_NALU) {
        *nalSize = bufSize - pos;
        return ENCODE_SUCCESS;
    }

    dataPtr  = inBuffer + pos;
    dataRemaining = bufSize - pos + 1;

    while ((dataRemaining > 0) && (zeroByteCount < 3)) {
        if (((((uint32_t)dataPtr) & 0xF ) == 0) && (0 == zeroByteCount)
               && (dataRemaining > 0xF)) {

            __asm__  (
                //Data input
                "movl %1, %%ecx\n\t"//data_ptr=>ecx
                "movl %0, %%eax\n\t"//data_remaing=>eax
                //Main compare loop
                //
                "0:\n\t"   //MATCH_8_ZERO:
                "pxor %%xmm0,%%xmm0\n\t"//set 0=>xmm0
                "pcmpeqb (%%ecx),%%xmm0\n\t"//data_ptr=xmm0,(byte==0)?0xFF:0x00
                "pmovmskb %%xmm0, %%edx\n\t"//edx[0]=xmm0[7],edx[1]=xmm0[15],...,edx[15]=xmm0[127]
                "test $0xAAAA, %%edx\n\t"//edx& 1010 1010 1010 1010b
                "jnz 2f\n\t"//Not equal to zero means that at least one byte 0x00

                "1:\n\t"  //PREPARE_NEXT_MATCH:
                "sub $0x10, %%eax\n\t"//16 + ecx --> ecx
                "add $0x10, %%ecx\n\t"//eax-16 --> eax
                "cmp $0x10, %%eax\n\t"
                "jge 0b\n\t"//search next 16 bytes

                "2:\n\t"   //DATA_RET:
                "movl %%ecx, %1\n\t"//output ecx->data_ptr
                "movl %%eax, %0\n\t"//output eax->data_remaining
                : "+m"(dataRemaining), "+m"(dataPtr)
                :
                :"eax", "ecx", "edx", "xmm0"
                );
            if (0 >= dataRemaining) {
                break;
            }

        }
        //check the value of each byte
        if ((*dataPtr) >= 2) {

            zeroByteCount = 0;

        }
        else {
            zeroByteCount = singleByteTable[zeroByteCount][*dataPtr];
         }

        dataPtr ++;
        dataRemaining --;
    }

    if ((3 == zeroByteCount) && (dataRemaining > 0)) {

        *nalSize =  bufSize - dataRemaining - *nalOffset - 3;

    } else if (0 == dataRemaining) {

        *nalSize = bufSize - *nalOffset;
    }
    return ENCODE_SUCCESS;
}

Encode_Status VideoEncoderAVC::getHeader(
        uint8_t *inBuffer, uint32_t bufSize, uint32_t *headerSize, uint32_t status) {

    uint32_t nalType = 0;
    uint32_t nalSize = 0;
    uint32_t nalOffset = 0;
    uint32_t size = 0;
    uint8_t *buf = inBuffer;
    Encode_Status ret = ENCODE_SUCCESS;

    *headerSize = 0;
    CHECK_NULL_RETURN_IFFAIL(inBuffer);

    if (bufSize == 0) {
        //bufSize shoule not be 0, error happens
        LOG_E("Buffer size is 0\n");
        return ENCODE_FAIL;
    }

    while (1) {
        nalType = nalSize = nalOffset = 0;
        ret = getOneNALUnit(buf, bufSize, &nalSize, &nalType, &nalOffset, status);
        CHECK_ENCODE_STATUS_RETURN("getOneNALUnit");

        LOG_I("NAL type = %d, NAL size = %d, offset = %d\n", nalType, nalSize, nalOffset);
        size = nalSize + nalOffset;

        // Codec_data should be SPS or PPS
        if (nalType == 7 || nalType == 8) {
            *headerSize += size;
            buf += size;
            bufSize -= size;
        } else {
            LOG_V("No header found or no header anymore\n");
            break;
        }
    }

    return ENCODE_SUCCESS;
}

Encode_Status VideoEncoderAVC::outputCodecData(
        VideoEncOutputBuffer *outBuffer) {

    Encode_Status ret = ENCODE_SUCCESS;
    uint32_t headerSize = 0;

    ret = getHeader((uint8_t *)mCurSegment->buf + mOffsetInSeg,
            mCurSegment->size - mOffsetInSeg, &headerSize, mCurSegment->status);
    CHECK_ENCODE_STATUS_RETURN("getHeader");
    if (headerSize == 0) {
        outBuffer->dataSize = 0;
        mCurSegment = NULL;
        return ENCODE_NO_REQUEST_DATA;
    }

    if (headerSize <= outBuffer->bufferSize) {
        memcpy(outBuffer->data, (uint8_t *)mCurSegment->buf + mOffsetInSeg, headerSize);
//        mTotalSizeCopied += headerSize;
//        mOffsetInSeg += headerSize;
        outBuffer->dataSize = headerSize;
        outBuffer->remainingSize = 0;
        outBuffer->flag |= ENCODE_BUFFERFLAG_ENDOFFRAME;
        outBuffer->flag |= ENCODE_BUFFERFLAG_CODECCONFIG;
        outBuffer->flag |= ENCODE_BUFFERFLAG_SYNCFRAME;
    } else {
        // we need a big enough buffer, otherwise we won't output anything
        outBuffer->dataSize = 0;
        outBuffer->remainingSize = headerSize;
        outBuffer->flag |= ENCODE_BUFFERFLAG_DATAINVALID;
        LOG_E("Buffer size too small\n");
        return ENCODE_BUFFER_TOO_SMALL;
    }

    return ret;
}

Encode_Status VideoEncoderAVC::outputOneNALU(
        VideoEncOutputBuffer *outBuffer, bool startCode) {

    uint32_t nalType = 0;
    uint32_t nalSize = 0;
    uint32_t nalOffset = 0;
    uint32_t sizeToBeCopied = 0;

    Encode_Status ret = ENCODE_SUCCESS;
    CHECK_NULL_RETURN_IFFAIL(mCurSegment->buf);

    ret = getOneNALUnit((uint8_t *)mCurSegment->buf + mOffsetInSeg,
            mCurSegment->size - mOffsetInSeg, &nalSize, &nalType, &nalOffset, mCurSegment->status);
    CHECK_ENCODE_STATUS_RETURN("getOneNALUnit");

    // check if we need startcode along with the payload
    if (startCode) {
        sizeToBeCopied = nalSize + nalOffset;
    } else {
        sizeToBeCopied = nalSize;
    }

    if (sizeToBeCopied <= outBuffer->bufferSize) {
        if (startCode) {
            memcpy(outBuffer->data, (uint8_t *)mCurSegment->buf + mOffsetInSeg, sizeToBeCopied);
        } else {
            memcpy(outBuffer->data, (uint8_t *)mCurSegment->buf + mOffsetInSeg + nalOffset,
                   sizeToBeCopied);
        }
        mTotalSizeCopied += sizeToBeCopied;
        mOffsetInSeg += (nalSize + nalOffset);
        outBuffer->dataSize = sizeToBeCopied;
        outBuffer->flag |= ENCODE_BUFFERFLAG_PARTIALFRAME;
        outBuffer->remainingSize = 0;
    } else {
        // if nothing to be copied out, set flag to invalid
        outBuffer->dataSize = 0;
        outBuffer->flag |= ENCODE_BUFFERFLAG_DATAINVALID;
        outBuffer->remainingSize = sizeToBeCopied;
        LOG_W("Buffer size too small\n");
        return ENCODE_BUFFER_TOO_SMALL;
    }

    // check if all data in current segment has been copied out
    if (mCurSegment->size == mOffsetInSeg) {
        if (mCurSegment->next != NULL) {
            mCurSegment = (VACodedBufferSegment *)mCurSegment->next;
            mOffsetInSeg = 0;
        } else {
            LOG_V("End of stream\n");
            outBuffer->flag |= ENCODE_BUFFERFLAG_ENDOFFRAME;
            mCurSegment = NULL;
        }
    }

    return ENCODE_SUCCESS;
}

Encode_Status VideoEncoderAVC::outputLengthPrefixed(VideoEncOutputBuffer *outBuffer) {

    Encode_Status ret = ENCODE_SUCCESS;
    uint32_t nalType = 0;
    uint32_t nalSize = 0;
    uint32_t nalOffset = 0;
    uint32_t sizeCopiedHere = 0;

    CHECK_NULL_RETURN_IFFAIL(mCurSegment->buf);

    while (1) {

        if (mCurSegment->size < mOffsetInSeg || outBuffer->bufferSize < sizeCopiedHere) {
            LOG_E("mCurSegment->size < mOffsetInSeg  || outBuffer->bufferSize < sizeCopiedHere\n");
            return ENCODE_FAIL;
        }

        // we need to handle the whole bitstream NAL by NAL
        ret = getOneNALUnit(
                (uint8_t *)mCurSegment->buf + mOffsetInSeg,
                mCurSegment->size - mOffsetInSeg, &nalSize, &nalType, &nalOffset, mCurSegment->status);
        CHECK_ENCODE_STATUS_RETURN("getOneNALUnit");

        if (nalSize + 4 <= outBuffer->bufferSize - sizeCopiedHere) {
            // write the NAL length to bit stream
            outBuffer->data[sizeCopiedHere] = (nalSize >> 24) & 0xff;
            outBuffer->data[sizeCopiedHere + 1] = (nalSize >> 16) & 0xff;
            outBuffer->data[sizeCopiedHere + 2] = (nalSize >> 8)  & 0xff;
            outBuffer->data[sizeCopiedHere + 3] = nalSize   & 0xff;

            sizeCopiedHere += 4;
            mTotalSizeCopied += 4;

            memcpy(outBuffer->data + sizeCopiedHere,
                   (uint8_t *)mCurSegment->buf + mOffsetInSeg + nalOffset, nalSize);

            sizeCopiedHere += nalSize;
            mTotalSizeCopied += nalSize;
            mOffsetInSeg += (nalSize + nalOffset);

        } else {
            outBuffer->dataSize = sizeCopiedHere;
            // In case the start code is 3-byte length but we use 4-byte for length prefixed
            // so the remainingSize size may larger than the remaining data size
            outBuffer->remainingSize = mTotalSize - mTotalSizeCopied + 100;
            outBuffer->flag |= ENCODE_BUFFERFLAG_PARTIALFRAME;
            LOG_E("Buffer size too small\n");
            return ENCODE_BUFFER_TOO_SMALL;
        }

        // check if all data in current segment has been copied out
        if (mCurSegment->size == mOffsetInSeg) {
            if (mCurSegment->next != NULL) {
                mCurSegment = (VACodedBufferSegment *)mCurSegment->next;
                mOffsetInSeg = 0;
            } else {
                LOG_V("End of stream\n");
                outBuffer->dataSize = sizeCopiedHere;
                outBuffer->remainingSize = 0;
                outBuffer->flag |= ENCODE_BUFFERFLAG_ENDOFFRAME;
                mCurSegment = NULL;
                break;
            }
        }
    }

    return ENCODE_SUCCESS;
}

Encode_Status VideoEncoderAVC::sendEncodeCommand(EncodeTask *task) {
    Encode_Status ret = ENCODE_SUCCESS;

    LOG_V( "Begin\n");
    if (mFrameNum == 0 || mNewHeader) {

        if (mRenderHrd) {
            ret = renderHrd();
            mRenderHrd = false;
            CHECK_ENCODE_STATUS_RETURN("renderHrd");
        }

        ret = renderSequenceParams(task);
        CHECK_ENCODE_STATUS_RETURN("renderSequenceParams");
        mNewHeader = false; //Set to require new header filed to false
    }

    if (mRenderMaxSliceSize && mVideoParamsAVC.maxSliceSize != 0) {
        ret = renderMaxSliceSize();
        CHECK_ENCODE_STATUS_RETURN("renderMaxSliceSize");
        mRenderMaxSliceSize = false;
    }

    if (mRenderBitRate) {
        ret = VideoEncoderBase::renderDynamicBitrate();
        CHECK_ENCODE_STATUS_RETURN("renderDynamicBitrate");

        mRenderBitRate = false;
    }

    if (mRenderAIR &&
        (mComParams.refreshType == VIDEO_ENC_AIR ||
        mComParams.refreshType == VIDEO_ENC_BOTH)) {

        ret = renderAIR();
        CHECK_ENCODE_STATUS_RETURN("renderAIR");

        mRenderAIR = false;
    }

    if (mRenderFrameRate) {

        ret = VideoEncoderBase::renderDynamicFrameRate();
        CHECK_ENCODE_STATUS_RETURN("renderDynamicFrameRate");

        mRenderFrameRate = false;
    }

    ret = renderPictureParams(task);
    CHECK_ENCODE_STATUS_RETURN("renderPictureParams");

    if (mFrameNum == 0 && (mEncPackedHeaders != VA_ATTRIB_NOT_SUPPORTED)) {
        ret = renderPackedSequenceParams(task);
        CHECK_ENCODE_STATUS_RETURN("renderPackedSequenceParams");

        ret = renderPackedPictureParams(task);
        CHECK_ENCODE_STATUS_RETURN("renderPackedPictureParams");
    }

    ret = renderSliceParams(task);
    CHECK_ENCODE_STATUS_RETURN("renderSliceParams");

    LOG_V( "End\n");
    return ENCODE_SUCCESS;
}


Encode_Status VideoEncoderAVC::renderMaxSliceSize() {

    VAStatus vaStatus = VA_STATUS_SUCCESS;
    LOG_V( "Begin\n\n");

    if (mComParams.rcMode != RATE_CONTROL_VCM) {
        LOG_W ("Not in VCM mode, but call send_max_slice_size\n");
        return ENCODE_SUCCESS;
    }

    VAEncMiscParameterBuffer *miscEncParamBuf;
    VAEncMiscParameterMaxSliceSize *maxSliceSizeParam;
    VABufferID miscParamBufferID;

    vaStatus = vaCreateBuffer(
            mVADisplay, mVAContext,
            VAEncMiscParameterBufferType,
            sizeof(VAEncMiscParameterBuffer) + sizeof(VAEncMiscParameterMaxSliceSize),
            1, NULL, &miscParamBufferID);
    CHECK_VA_STATUS_RETURN("vaCreateBuffer");

    vaStatus = vaMapBuffer(mVADisplay, miscParamBufferID, (void **)&miscEncParamBuf);
    CHECK_VA_STATUS_RETURN("vaMapBuffer");

    miscEncParamBuf->type = VAEncMiscParameterTypeMaxSliceSize;
    maxSliceSizeParam = (VAEncMiscParameterMaxSliceSize *)miscEncParamBuf->data;

    maxSliceSizeParam->max_slice_size = mVideoParamsAVC.maxSliceSize;

    vaStatus = vaUnmapBuffer(mVADisplay, miscParamBufferID);
    CHECK_VA_STATUS_RETURN("vaUnmapBuffer");

    LOG_I( "max slice size = %d\n", maxSliceSizeParam->max_slice_size);

    vaStatus = vaRenderPicture(mVADisplay, mVAContext, &miscParamBufferID, 1);
    CHECK_VA_STATUS_RETURN("vaRenderPicture");

    return ENCODE_SUCCESS;
}

Encode_Status VideoEncoderAVC::renderAIR() {

    VAStatus vaStatus = VA_STATUS_SUCCESS;
    LOG_V( "Begin\n\n");

    if (mComParams.rcMode != RATE_CONTROL_VCM) {

        LOG_W("Not in VCM mode, but call send_AIR\n");
        return ENCODE_SUCCESS;
    }

    VAEncMiscParameterBuffer   *miscEncParamBuf;
    VAEncMiscParameterAIR *airParams;
    VABufferID miscParamBufferID;

    vaStatus = vaCreateBuffer(
            mVADisplay, mVAContext,
            VAEncMiscParameterBufferType,
            sizeof(miscEncParamBuf) + sizeof(VAEncMiscParameterAIR),
            1, NULL, &miscParamBufferID);
    CHECK_VA_STATUS_RETURN("vaCreateBuffer");

    vaStatus = vaMapBuffer(mVADisplay, miscParamBufferID, (void **)&miscEncParamBuf);
    CHECK_VA_STATUS_RETURN("vaMapBuffer");

    miscEncParamBuf->type = VAEncMiscParameterTypeAIR;
    airParams = (VAEncMiscParameterAIR *)miscEncParamBuf->data;

    airParams->air_num_mbs = mComParams.airParams.airMBs;
    airParams->air_threshold= mComParams.airParams.airThreshold;
    airParams->air_auto = mComParams.airParams.airAuto;

    vaStatus = vaUnmapBuffer(mVADisplay, miscParamBufferID);
    CHECK_VA_STATUS_RETURN("vaUnmapBuffer");

    vaStatus = vaRenderPicture(mVADisplay, mVAContext, &miscParamBufferID, 1);
    CHECK_VA_STATUS_RETURN("vaRenderPicture");

    LOG_I( "airThreshold = %d\n", airParams->air_threshold);
    return ENCODE_SUCCESS;
}

int VideoEncoderAVC::calcLevel(int numMbs) {
    int level = 30;

    if (numMbs < 1620) {
        level = 30;
    } else if (numMbs < 3600) {
        level = 31;
    } else if (numMbs < 5120) {
        level = 32;
    } else if (numMbs < 8192) {
        level = 41;
    } else if (numMbs < 8704) {
        level = 42;
    } else if (numMbs < 22080) {
        level = 50;
    } else if (numMbs < 36864) {
        level = 51;
    } else {
        LOG_W("No such level can support that resolution");
        level = 51;
    }
    return level;
}

Encode_Status VideoEncoderAVC::renderSequenceParams(EncodeTask *task) {

    VAStatus vaStatus = VA_STATUS_SUCCESS;
    VAEncSequenceParameterBufferH264 avcSeqParams = {};
    VAEncMiscParameterBuffer   *miscEncRCParamBuf;
    VAEncMiscParameterBuffer   *miscEncFrameRateParamBuf;
    VAEncMiscParameterRateControl *rcMiscParam;
    VAEncMiscParameterFrameRate *framerateParam;
    int level;
    uint32_t frameRateNum = mComParams.frameRate.frameRateNum;
    uint32_t frameRateDenom = mComParams.frameRate.frameRateDenom;

    LOG_V( "Begin\n\n");
    vaStatus = vaCreateBuffer(mVADisplay, mVAContext,
            VAEncMiscParameterBufferType,
            sizeof (VAEncMiscParameterBuffer) + sizeof (VAEncMiscParameterRateControl),
            1, NULL,
            &mRcParamBuf);
    CHECK_VA_STATUS_RETURN("vaCreateBuffer");
    vaStatus = vaMapBuffer(mVADisplay, mRcParamBuf, (void **)&miscEncRCParamBuf);
    CHECK_VA_STATUS_RETURN("vaMapBuffer");

    vaStatus = vaCreateBuffer(mVADisplay, mVAContext,
            VAEncMiscParameterBufferType,
            sizeof (VAEncMiscParameterBuffer) + sizeof (VAEncMiscParameterFrameRate),
            1, NULL,
            &mFrameRateParamBuf);
    CHECK_VA_STATUS_RETURN("vaCreateBuffer");
    vaStatus = vaMapBuffer(mVADisplay, mFrameRateParamBuf, (void **)&miscEncFrameRateParamBuf);
    CHECK_VA_STATUS_RETURN("vaMapBuffer");

    miscEncRCParamBuf->type = VAEncMiscParameterTypeRateControl;
    rcMiscParam = (VAEncMiscParameterRateControl  *)miscEncRCParamBuf->data;
    miscEncFrameRateParamBuf->type = VAEncMiscParameterTypeFrameRate;
    framerateParam = (VAEncMiscParameterFrameRate *)miscEncFrameRateParamBuf->data;
    // set up the sequence params for HW
    // avcSeqParams.level_idc = mLevel;
    avcSeqParams.intra_period = mComParams.intraPeriod;
    avcSeqParams.intra_idr_period = mVideoParamsAVC.idrInterval;
    avcSeqParams.ip_period = mVideoParamsAVC.ipPeriod;
    avcSeqParams.picture_width_in_mbs = (mComParams.resolution.width + 15) / 16;
    avcSeqParams.picture_height_in_mbs = (mComParams.resolution.height + 15) / 16;

    level = calcLevel (avcSeqParams.picture_width_in_mbs * avcSeqParams.picture_height_in_mbs);
    avcSeqParams.level_idc = level;
    avcSeqParams.bits_per_second = mComParams.rcParams.bitRate;
    framerateParam->framerate =
            (unsigned int) (frameRateNum + frameRateDenom /2 ) / frameRateDenom;
    rcMiscParam->initial_qp = mComParams.rcParams.initQP;
    rcMiscParam->min_qp = mComParams.rcParams.minQP;
    rcMiscParam->window_size = mComParams.rcParams.windowSize;
    //target bitrate is sent to libva through Sequence Parameter Buffer
    rcMiscParam->bits_per_second = 0;
    rcMiscParam->basic_unit_size = mVideoParamsAVC.basicUnitSize; //for rate control usage
    avcSeqParams.intra_period = mComParams.intraPeriod;
    //avcSeqParams.vui_flag = 248;
    avcSeqParams.vui_parameters_present_flag = mVideoParamsAVC.VUIFlag;
    avcSeqParams.num_units_in_tick = frameRateDenom;
    avcSeqParams.time_scale = 2 * frameRateNum;
    avcSeqParams.seq_parameter_set_id = 0;
    if (mVideoParamsAVC.crop.LeftOffset ||
            mVideoParamsAVC.crop.RightOffset ||
            mVideoParamsAVC.crop.TopOffset ||
            mVideoParamsAVC.crop.BottomOffset) {
        avcSeqParams.frame_cropping_flag = true;
        avcSeqParams.frame_crop_left_offset = mVideoParamsAVC.crop.LeftOffset;
        avcSeqParams.frame_crop_right_offset = mVideoParamsAVC.crop.RightOffset;
        avcSeqParams.frame_crop_top_offset = mVideoParamsAVC.crop.TopOffset;
        avcSeqParams.frame_crop_bottom_offset = mVideoParamsAVC.crop.BottomOffset;
    } else {
        avcSeqParams.frame_cropping_flag = false;

        if (mComParams.resolution.width & 0xf) {
            avcSeqParams.frame_cropping_flag = true;
            uint32_t AWidth = (mComParams.resolution.width + 0xf) & (~0xf);
            avcSeqParams.frame_crop_right_offset = ( AWidth - mComParams.resolution.width ) / 2;
        }

        if (mComParams.resolution.height & 0xf) {
            avcSeqParams.frame_cropping_flag = true;
            uint32_t AHeight = (mComParams.resolution.height + 0xf) & (~0xf);
            avcSeqParams.frame_crop_bottom_offset = ( AHeight - mComParams.resolution.height ) / 2;
        }
    }

    if(avcSeqParams.vui_parameters_present_flag && (mVideoParamsAVC.SAR.SarWidth || mVideoParamsAVC.SAR.SarHeight)) {
        avcSeqParams.vui_fields.bits.aspect_ratio_info_present_flag = true;
        avcSeqParams.aspect_ratio_idc = 0xff /* Extended_SAR */;
        avcSeqParams.sar_width = mVideoParamsAVC.SAR.SarWidth;
        avcSeqParams.sar_height = mVideoParamsAVC.SAR.SarHeight;
    }

    avcSeqParams.max_num_ref_frames = 1;

    if(avcSeqParams.ip_period > 1)
        avcSeqParams.max_num_ref_frames = 2; 

    LOG_V("===h264 sequence params===\n");
    LOG_I( "seq_parameter_set_id = %d\n", (uint32_t)avcSeqParams.seq_parameter_set_id);
    LOG_I( "level_idc = %d\n", (uint32_t)avcSeqParams.level_idc);
    LOG_I( "intra_period = %d\n", avcSeqParams.intra_period);
    LOG_I( "idr_interval = %d\n", avcSeqParams.intra_idr_period);
    LOG_I( "picture_width_in_mbs = %d\n", avcSeqParams.picture_width_in_mbs);
    LOG_I( "picture_height_in_mbs = %d\n", avcSeqParams.picture_height_in_mbs);
    LOG_I( "bitrate = %d\n", rcMiscParam->bits_per_second);
    LOG_I( "frame_rate = %d\n", framerateParam->framerate);
    LOG_I( "initial_qp = %d\n", rcMiscParam->initial_qp);
    LOG_I( "min_qp = %d\n", rcMiscParam->min_qp);
    LOG_I( "basic_unit_size = %d\n", rcMiscParam->basic_unit_size);

    // Not sure whether these settings work for all drivers
    avcSeqParams.seq_fields.bits.frame_mbs_only_flag = 1;
    avcSeqParams.seq_fields.bits.pic_order_cnt_type = 0;
    avcSeqParams.seq_fields.bits.direct_8x8_inference_flag = 0;

    avcSeqParams.seq_fields.bits.log2_max_frame_num_minus4 = 0;
    avcSeqParams.seq_fields.bits.log2_max_pic_order_cnt_lsb_minus4 = 2;
//    avcSeqParams.time_scale = 900;
//    avcSeqParams.num_units_in_tick = 15;			/* Tc = num_units_in_tick / time_sacle */
    // Not sure whether these settings work for all drivers

    vaStatus = vaUnmapBuffer(mVADisplay, mRcParamBuf);
    CHECK_VA_STATUS_RETURN("vaUnmapBuffer");
    vaStatus = vaUnmapBuffer(mVADisplay, mFrameRateParamBuf);
    CHECK_VA_STATUS_RETURN("vaUnmapBuffer");
    vaStatus = vaCreateBuffer(
            mVADisplay, mVAContext,
            VAEncSequenceParameterBufferType,
            sizeof(avcSeqParams), 1, &avcSeqParams,
            &mSeqParamBuf);
    CHECK_VA_STATUS_RETURN("vaCreateBuffer");
    vaStatus = vaRenderPicture(mVADisplay, mVAContext, &mFrameRateParamBuf, 1);
    CHECK_VA_STATUS_RETURN("vaRenderPicture");
    vaStatus = vaRenderPicture(mVADisplay, mVAContext, &mSeqParamBuf, 1);
    CHECK_VA_STATUS_RETURN("vaRenderPicture");
    vaStatus = vaRenderPicture(mVADisplay, mVAContext, &mRcParamBuf, 1);
    CHECK_VA_STATUS_RETURN("vaRenderPicture");

    return ENCODE_SUCCESS;
}

Encode_Status VideoEncoderAVC::renderPackedSequenceParams(EncodeTask *task) {

    VAStatus vaStatus = VA_STATUS_SUCCESS;
    VAEncSequenceParameterBufferH264 *avcSeqParams;
    VAEncPackedHeaderParameterBuffer packed_header_param_buffer;
    unsigned char *packed_seq_buffer = NULL;
    unsigned int length_in_bits, offset_in_bytes;

    LOG_V("Begin\n");

    vaStatus = vaMapBuffer(mVADisplay, mSeqParamBuf, (void **)&avcSeqParams);
    CHECK_VA_STATUS_RETURN("vaMapBuffer");

    length_in_bits = build_packed_seq_buffer(&packed_seq_buffer, mComParams.profile, avcSeqParams);
    packed_header_param_buffer.type = VAEncPackedHeaderSequence;
    packed_header_param_buffer.bit_length = length_in_bits;
    packed_header_param_buffer.has_emulation_bytes = 0;
    vaStatus = vaCreateBuffer(mVADisplay, mVAContext,
            VAEncPackedHeaderParameterBufferType,
            sizeof(packed_header_param_buffer), 1, &packed_header_param_buffer,
            &packed_seq_header_param_buf_id);
    CHECK_VA_STATUS_RETURN("vaCreateBuffer");

    vaStatus = vaCreateBuffer(mVADisplay, mVAContext,
            VAEncPackedHeaderDataBufferType,
            (length_in_bits + 7) / 8, 1, packed_seq_buffer,
            &packed_seq_buf_id);
    CHECK_VA_STATUS_RETURN("vaCreateBuffer");

    vaStatus = vaRenderPicture(mVADisplay, mVAContext, &packed_seq_header_param_buf_id, 1);
    CHECK_VA_STATUS_RETURN("vaRenderPicture");

    vaStatus = vaRenderPicture(mVADisplay, mVAContext, &packed_seq_buf_id, 1);
    CHECK_VA_STATUS_RETURN("vaRenderPicture");

    vaStatus = vaUnmapBuffer(mVADisplay, mSeqParamBuf);
    CHECK_VA_STATUS_RETURN("vaUnmapBuffer");

    free(packed_seq_buffer);

    LOG_V("End\n");

    return vaStatus;
}

Encode_Status VideoEncoderAVC::renderPictureParams(EncodeTask *task) {

    VAStatus vaStatus = VA_STATUS_SUCCESS;
    VAEncPictureParameterBufferH264 avcPicParams = {};
    uint32_t RefFrmIdx;

    LOG_V( "Begin\n\n");
    // set picture params for HW
    if (mAutoReference == false) {
        for (RefFrmIdx = 0; RefFrmIdx < 16; RefFrmIdx++) {
            avcPicParams.ReferenceFrames[RefFrmIdx].picture_id = VA_INVALID_ID;
            avcPicParams.ReferenceFrames[RefFrmIdx].flags = VA_PICTURE_H264_INVALID;
        }
        avcPicParams.ReferenceFrames[0].picture_id= task->ref_surface;
        avcPicParams.ReferenceFrames[0].flags = VA_PICTURE_H264_SHORT_TERM_REFERENCE;
        avcPicParams.CurrPic.picture_id= task->rec_surface;
        // Not sure whether these settings work for all drivers
        avcPicParams.CurrPic.TopFieldOrderCnt = mFrameNum * 2;

        avcPicParams.pic_fields.bits.transform_8x8_mode_flag = 0;
        avcPicParams.seq_parameter_set_id = 0;
        avcPicParams.pic_parameter_set_id = 0;

        avcPicParams.last_picture = 0;
        avcPicParams.frame_num = 0;

        avcPicParams.pic_init_qp = 26;
        avcPicParams.num_ref_idx_l0_active_minus1 = 0;
        avcPicParams.num_ref_idx_l1_active_minus1 = 0;

        avcPicParams.pic_fields.bits.idr_pic_flag = 0;
        avcPicParams.pic_fields.bits.reference_pic_flag = 0;
        avcPicParams.pic_fields.bits.entropy_coding_mode_flag = 0;
        avcPicParams.pic_fields.bits.weighted_pred_flag = 0;
        avcPicParams.pic_fields.bits.weighted_bipred_idc = 0;
        avcPicParams.pic_fields.bits.transform_8x8_mode_flag = 0;
        avcPicParams.pic_fields.bits.deblocking_filter_control_present_flag = 1;

        avcPicParams.frame_num = mFrameNum;
        avcPicParams.pic_fields.bits.idr_pic_flag = (mFrameNum == 0);
        avcPicParams.pic_fields.bits.reference_pic_flag = 1;
        // Not sure whether these settings work for all drivers
    }else {
        avcPicParams.CurrPic.picture_id= VA_INVALID_SURFACE;
        for(int i =0; i< mAutoReferenceSurfaceNum; i++)
            avcPicParams.ReferenceFrames[i].picture_id = mAutoRefSurfaces[i];
    }

    avcPicParams.pic_fields.bits.entropy_coding_mode_flag = mVideoParamsAVC.bEntropyCodingCABAC;
    avcPicParams.coded_buf = task->coded_buffer;
    avcPicParams.last_picture = 0;

    LOG_V("======h264 picture params======\n");
    LOG_I( "reference_picture = 0x%08x\n", avcPicParams.ReferenceFrames[0].picture_id);
    LOG_I( "reconstructed_picture = 0x%08x\n", avcPicParams.CurrPic.picture_id);
    LOG_I( "coded_buf = 0x%08x\n", avcPicParams.coded_buf);
    //LOG_I( "picture_width = %d\n", avcPicParams.picture_width);
    //LOG_I( "picture_height = %d\n\n", avcPicParams.picture_height);

    vaStatus = vaCreateBuffer(
            mVADisplay, mVAContext,
            VAEncPictureParameterBufferType,
            sizeof(avcPicParams),
            1,&avcPicParams,
            &mPicParamBuf);
    CHECK_VA_STATUS_RETURN("vaCreateBuffer");

    vaStatus = vaRenderPicture(mVADisplay, mVAContext, &mPicParamBuf, 1);
    CHECK_VA_STATUS_RETURN("vaRenderPicture");

    LOG_V( "end\n");
    return ENCODE_SUCCESS;
}

Encode_Status VideoEncoderAVC::renderPackedPictureParams(EncodeTask *task) {

    VAStatus vaStatus = VA_STATUS_SUCCESS;
    VAEncPictureParameterBufferH264 *avcPicParams;
    VAEncPackedHeaderParameterBuffer packed_header_param_buffer;
    unsigned char *packed_pic_buffer = NULL;
    unsigned int length_in_bits, offset_in_bytes;

    LOG_V("Begin\n");

    vaStatus = vaMapBuffer(mVADisplay, mPicParamBuf, (void **)&avcPicParams);
    CHECK_VA_STATUS_RETURN("vaMapBuffer");

    length_in_bits = build_packed_pic_buffer(&packed_pic_buffer, avcPicParams);
    packed_header_param_buffer.type = VAEncPackedHeaderPicture;
    packed_header_param_buffer.bit_length = length_in_bits;
    packed_header_param_buffer.has_emulation_bytes = 0;
    vaStatus = vaCreateBuffer(mVADisplay, mVAContext,
            VAEncPackedHeaderParameterBufferType,
            sizeof(packed_header_param_buffer), 1, &packed_header_param_buffer,
            &packed_pic_header_param_buf_id);
    CHECK_VA_STATUS_RETURN("vaCreateBuffer");

    vaStatus = vaCreateBuffer(mVADisplay, mVAContext,
            VAEncPackedHeaderDataBufferType,
            (length_in_bits + 7) / 8, 1, packed_pic_buffer,
            &packed_pic_buf_id);
    CHECK_VA_STATUS_RETURN("vaCreateBuffer");

    vaStatus = vaRenderPicture(mVADisplay, mVAContext, &packed_pic_header_param_buf_id, 1);
    CHECK_VA_STATUS_RETURN("vaRenderPicture");

    vaStatus = vaRenderPicture(mVADisplay, mVAContext, &packed_pic_buf_id, 1);
    CHECK_VA_STATUS_RETURN("vaRenderPicture");

    vaStatus = vaUnmapBuffer(mVADisplay, mSeqParamBuf);
    CHECK_VA_STATUS_RETURN("vaUnmapBuffer");

    free(packed_pic_buffer);

    LOG_V("End\n");

    return vaStatus;
}

Encode_Status VideoEncoderAVC::renderSliceParams(EncodeTask *task) {

    VAStatus vaStatus = VA_STATUS_SUCCESS;

    uint32_t sliceNum = 0;
    uint32_t sliceIndex = 0;
    uint32_t sliceHeightInMB = 0;
    uint32_t maxSliceNum = 0;
    uint32_t minSliceNum = 0;
    uint32_t actualSliceHeightInMB = 0;
    uint32_t startRowInMB = 0;
    uint32_t modulus = 0;
    uint32_t RefFrmIdx;

    LOG_V( "Begin\n\n");

    maxSliceNum = (mComParams.resolution.height + 15) / 16;
    minSliceNum = 1;

    if (task->type == FTYPE_I || task->type == FTYPE_IDR) {
        sliceNum = mVideoParamsAVC.sliceNum.iSliceNum;
    } else {
        sliceNum = mVideoParamsAVC.sliceNum.pSliceNum;
    }

    if (sliceNum < minSliceNum) {
        LOG_W("Slice Number is too small");
        sliceNum = minSliceNum;
    }

    if (sliceNum > maxSliceNum) {
        LOG_W("Slice Number is too big");
        sliceNum = maxSliceNum;
    }

    mSliceNum= sliceNum;
    modulus = maxSliceNum % sliceNum;
    sliceHeightInMB = (maxSliceNum - modulus) / sliceNum ;

    vaStatus = vaCreateBuffer(
            mVADisplay, mVAContext,
            VAEncSliceParameterBufferType,
            sizeof(VAEncSliceParameterBufferH264),
            sliceNum, NULL,
            &mSliceParamBuf);
    CHECK_VA_STATUS_RETURN("vaCreateBuffer");

    VAEncSliceParameterBufferH264 *sliceParams, *currentSlice;

    vaStatus = vaMapBuffer(mVADisplay, mSliceParamBuf, (void **)&sliceParams);
    CHECK_VA_STATUS_RETURN("vaMapBuffer");
    if(!sliceParams)
        return ENCODE_NULL_PTR;
    memset(sliceParams, 0 , sizeof(VAEncSliceParameterBufferH264));
    if(!sliceParams)
        return ENCODE_NULL_PTR;

    currentSlice = sliceParams;
    startRowInMB = 0;
    for (sliceIndex = 0; sliceIndex < sliceNum; sliceIndex++) {
        currentSlice = sliceParams + sliceIndex;
        actualSliceHeightInMB = sliceHeightInMB;
        if (sliceIndex < modulus) {
            actualSliceHeightInMB ++;
        }

        // starting MB row number for this slice, suppose macroblock 16x16
        currentSlice->macroblock_address = startRowInMB * ((mComParams.resolution.width + 0xf) & ~0xf) / 16;
        // slice height measured in MB
        currentSlice->num_macroblocks = actualSliceHeightInMB * ((mComParams.resolution.width + 0xf) & ~0xf) / 16;
        if(task->type == FTYPE_I||task->type == FTYPE_IDR)
            currentSlice->slice_type = 2;
        else if(task->type == FTYPE_P)
            currentSlice->slice_type = 0;
        else if(task->type == FTYPE_B)
            currentSlice->slice_type = 1;
        currentSlice->disable_deblocking_filter_idc = mComParams.disableDeblocking;

        // This is a temporary fix suggested by Binglin for bad encoding quality issue
        // TODO: We need a long term design for this field
        //currentSlice->slice_flags.bits.uses_long_term_ref = 0;
        //currentSlice->slice_flags.bits.is_long_term_ref = 0;

        LOG_V("======AVC slice params======\n");
        LOG_I( "slice_index = %d\n", (int) sliceIndex);
        LOG_I( "macroblock_address = %d\n", (int) currentSlice->macroblock_address);
        LOG_I( "slice_height_in_mb = %d\n", (int) currentSlice->num_macroblocks);
        LOG_I( "slice.type = %d\n", (int) currentSlice->slice_type);
        LOG_I("disable_deblocking_filter_idc = %d\n\n", (int) currentSlice->disable_deblocking_filter_idc);

        // Not sure whether these settings work for all drivers
        currentSlice->pic_parameter_set_id = 0;
        currentSlice->pic_order_cnt_lsb = mFrameNum * 2;
        currentSlice->direct_spatial_mv_pred_flag = 0;
        currentSlice->num_ref_idx_l0_active_minus1 = 0;      /* FIXME: ??? */
        currentSlice->num_ref_idx_l1_active_minus1 = 0;
        currentSlice->cabac_init_idc = 0;
        currentSlice->slice_qp_delta = 0;
        currentSlice->disable_deblocking_filter_idc = 0;
        currentSlice->slice_alpha_c0_offset_div2 = 2;
        currentSlice->slice_beta_offset_div2 = 2;
        currentSlice->idr_pic_id = 0;
        for (RefFrmIdx = 0; RefFrmIdx < 32; RefFrmIdx++) {
            currentSlice->RefPicList0[RefFrmIdx].picture_id = VA_INVALID_ID;
            currentSlice->RefPicList0[RefFrmIdx].flags = VA_PICTURE_H264_INVALID;
        }
        currentSlice->RefPicList0[0].picture_id = task->ref_surface;
        currentSlice->RefPicList0[0].flags = VA_PICTURE_H264_SHORT_TERM_REFERENCE;
        // Not sure whether these settings work for all drivers

        startRowInMB += actualSliceHeightInMB;
    }

    vaStatus = vaUnmapBuffer(mVADisplay, mSliceParamBuf);
    CHECK_VA_STATUS_RETURN("vaUnmapBuffer");

    vaStatus = vaRenderPicture(mVADisplay, mVAContext, &mSliceParamBuf, 1);
    CHECK_VA_STATUS_RETURN("vaRenderPicture");
    LOG_V( "end\n");
    return ENCODE_SUCCESS;
}