/*############################################################################
  # Copyright (C) 2005 Intel Corporation
  #
  # SPDX-License-Identifier: MIT
  ############################################################################*/

#include "mfx_samples_config.h"

#include <math.h>
#include <algorithm>
#include <iostream>
#include <map>

#include "sample_defs.h"
#include "sample_utils.h"
#include "time_statistics.h"
#include "vm/strings_defs.h"
#include "vpl/mfxcommon.h"
#include "vpl/mfxjpeg.h"
#include "vpl/mfxvideo++.h"
#include "vpl/mfxvideo.h"
#include "vpl/mfxvp8.h"

// include 32/64/debug lib
#define LIBMFXSW_MASK "libmfxsw"
#define LIBMFXHW_MASK "libmfxhw"
#define ONEVPLSW_MASK "libvplswref"

#if defined(_WIN32) || defined(_WIN64)

    #include <DXGI.h>
    #include <psapi.h>
    #include <tchar.h>
    #include <windows.h>
    #include <memory>

    #define ONEVPL32 "libmfx32-gen.dll"
    #define ONEVPL64 "libmfx64-gen.dll"

#else

    #include <link.h>
    #include <string>

    #if defined(__x86_64__)
        #define ONEVPL_MASK "libmfx-gen"
    #else
        #error Unsupported architecture
    #endif

#endif // #if defined(_WIN32) || defined(_WIN64)

msdk_tick CTimer::frequency              = 0;
msdk_tick CTimeStatisticsReal::frequency = 0;

mfxStatus CopyBitstream2(mfxBitstream* dest, mfxBitstream* src) {
    if (!dest || !src)
        return MFX_ERR_NULL_PTR;

    if (!dest->DataLength) {
        dest->DataOffset = 0;
    }
    else {
        memmove(dest->Data, dest->Data + dest->DataOffset, dest->DataLength);
        dest->DataOffset = 0;
    }

    if (src->DataLength > dest->MaxLength - dest->DataLength - dest->DataOffset)
        return MFX_ERR_NOT_ENOUGH_BUFFER;

    MSDK_MEMCPY_BITSTREAM(*dest, dest->DataOffset, src->Data, src->DataLength);
    dest->DataLength = src->DataLength;

    dest->DataFlag = src->DataFlag;

    //common Extended buffer will be for src and dest bit streams
    dest->EncryptedData = src->EncryptedData;

    return MFX_ERR_NONE;
}

mfxStatus GetFrameLength(mfxU16 width, mfxU16 height, mfxU32 ColorFormat, mfxU32& length) {
    switch (ColorFormat) {
        case MFX_FOURCC_NV12:
        case MFX_FOURCC_I420:
            length = 3 * width * height / 2;
            break;
        case MFX_FOURCC_YUY2:
            length = 2 * width * height;
            break;
        case MFX_FOURCC_RGB4:
            length = 4 * width * height;
            break;
        case MFX_FOURCC_P010:
            length = 3 * width * height;
            break;
        default:
            return MFX_ERR_UNSUPPORTED;
    }

    return MFX_ERR_NONE;
}

CSmplYUVReader::CSmplYUVReader()
        : m_ColorFormat(MFX_FOURCC_YV12),
          m_files(),
          shouldShift10BitsHigh(false),
          m_bInited(false) {}

mfxStatus CSmplYUVReader::Init(std::list<msdk_string> inputs,
                               mfxU32 ColorFormat,
                               bool enableShifting) {
    Close();

    if (MFX_FOURCC_NV12 != ColorFormat && MFX_FOURCC_YV12 != ColorFormat &&
        MFX_FOURCC_I420 != ColorFormat && MFX_FOURCC_YUY2 != ColorFormat &&
        MFX_FOURCC_UYVY != ColorFormat && MFX_FOURCC_RGB4 != ColorFormat &&
        MFX_FOURCC_BGR4 != ColorFormat && MFX_FOURCC_P010 != ColorFormat &&
        MFX_FOURCC_P210 != ColorFormat && MFX_FOURCC_AYUV != ColorFormat &&
        MFX_FOURCC_A2RGB10 != ColorFormat && MFX_FOURCC_Y210 != ColorFormat &&
        MFX_FOURCC_Y410 != ColorFormat && MFX_FOURCC_P016 != ColorFormat &&
        MFX_FOURCC_Y216 != ColorFormat && MFX_FOURCC_I010 != ColorFormat) {
        return MFX_ERR_UNSUPPORTED;
    }

    if (MFX_FOURCC_P010 == ColorFormat || MFX_FOURCC_P210 == ColorFormat ||
        MFX_FOURCC_Y210 == ColorFormat || MFX_FOURCC_P016 == ColorFormat ||
        MFX_FOURCC_Y216 == ColorFormat) {
        shouldShift10BitsHigh = enableShifting;
    }

    if (!inputs.size()) {
        return MFX_ERR_UNSUPPORTED;
    }

    for (ls_iterator it = inputs.begin(); it != inputs.end(); it++) {
        m_files.push_back(NULL);
        auto& f = m_files.back();
        MSDK_FOPEN(f, (*it).c_str(), MSDK_STRING("rb"));
        MSDK_CHECK_POINTER(f, MFX_ERR_NULL_PTR);
    }

    m_ColorFormat = ColorFormat;

    m_bInited = true;

    return MFX_ERR_NONE;
}

CSmplYUVReader::~CSmplYUVReader() {
    Close();
}

void CSmplYUVReader::Close() {
    for (mfxU32 i = 0; i < m_files.size(); i++) {
        fclose(m_files[i]);
    }
    m_files.clear();
    m_bInited = false;
}

void CSmplYUVReader::Reset() {
    for (mfxU32 i = 0; i < m_files.size(); i++) {
        fseek(m_files[i], 0, SEEK_SET);
    }
}

mfxStatus CSmplYUVReader::SkipNframesFromBeginning(mfxU16 w,
                                                   mfxU16 h,
                                                   mfxU32 viewId,
                                                   mfxU32 nframes) {
    // change file position for read from beginning to "frameLength * nframes".
    mfxU32 frameLength;

    if (MFX_ERR_NONE != GetFrameLength(w, h, m_ColorFormat, frameLength)) {
        msdk_printf(MSDK_STRING("Input color format %s is unsupported in qpfile mode\n"),
                    ColorFormatToStr(m_ColorFormat));
        return MFX_ERR_UNSUPPORTED;
    }

    if (0 != fseek(m_files[viewId], frameLength * nframes, SEEK_SET))
        return MFX_ERR_MORE_DATA;

    return MFX_ERR_NONE;
}

mfxStatus CSmplYUVReader::LoadNextFrame(mfxFrameSurface1* pSurface) {
    // check if reader is initialized
    MSDK_CHECK_ERROR(m_bInited, false, MFX_ERR_NOT_INITIALIZED);
    MSDK_CHECK_POINTER(pSurface, MFX_ERR_NULL_PTR);

    mfxU32 nBytesRead;
    mfxU16 w, h, i, pitch;
    mfxU8 *ptr, *ptr2;
    mfxFrameInfo& pInfo = pSurface->Info;
    mfxFrameData& pData = pSurface->Data;

    mfxU32 shiftSizeLuma   = 16 - pInfo.BitDepthLuma;
    mfxU32 shiftSizeChroma = 16 - pInfo.BitDepthChroma;

    mfxU32 vid = pInfo.FrameId.ViewId;

    if (vid > m_files.size()) {
        return MFX_ERR_UNSUPPORTED;
    }

    if (pInfo.CropH > 0 && pInfo.CropW > 0) {
        w = pInfo.CropW;
        h = pInfo.CropH;
    }
    else {
        w = pInfo.Width;
        h = pInfo.Height;
    }

    mfxU32 nBytesPerPixel = (pInfo.FourCC == MFX_FOURCC_P010 || pInfo.FourCC == MFX_FOURCC_P210 ||
                             pInfo.FourCC == MFX_FOURCC_P016 || pInfo.FourCC == MFX_FOURCC_I010)
                                ? 2
                                : 1;

    if (MFX_FOURCC_YUY2 == pInfo.FourCC || MFX_FOURCC_UYVY == pInfo.FourCC ||
        MFX_FOURCC_RGB4 == pInfo.FourCC || MFX_FOURCC_BGR4 == pInfo.FourCC ||
        MFX_FOURCC_AYUV == pInfo.FourCC || MFX_FOURCC_A2RGB10 == pInfo.FourCC ||
        MFX_FOURCC_Y210 == pInfo.FourCC || MFX_FOURCC_Y410 == pInfo.FourCC ||
        MFX_FOURCC_Y216 == pInfo.FourCC) {
        //Packed format: Luminance and chrominance are on the same plane
        switch (m_ColorFormat) {
            case MFX_FOURCC_A2RGB10:
            case MFX_FOURCC_AYUV:
            case MFX_FOURCC_RGB4:
            case MFX_FOURCC_BGR4:
                pitch = pData.Pitch;
                ptr   = std::min({ pData.R, pData.G, pData.B });
                ptr   = ptr + pInfo.CropX * 4 + pInfo.CropY * pData.Pitch;

                for (i = 0; i < h; i++) {
                    nBytesRead = (mfxU32)fread(ptr + i * pitch, 1, 4 * w, m_files[vid]);

                    if ((mfxU32)4 * w != nBytesRead) {
                        return MFX_ERR_MORE_DATA;
                    }
                }
                break;
            case MFX_FOURCC_YUY2:
            case MFX_FOURCC_UYVY:
                pitch = pData.Pitch;
                ptr   = m_ColorFormat == MFX_FOURCC_YUY2
                            ? pData.Y + pInfo.CropX * 2 + pInfo.CropY * pData.Pitch
                            : pData.U + pInfo.CropX + pInfo.CropY * pData.Pitch;

                for (i = 0; i < h; i++) {
                    nBytesRead = (mfxU32)fread(ptr + i * pitch, 2, w, m_files[vid]);

                    if ((mfxU32)w != nBytesRead) {
                        return MFX_ERR_MORE_DATA;
                    }
                }
                break;
            case MFX_FOURCC_Y210:
            case MFX_FOURCC_Y410:
            case MFX_FOURCC_Y216:
                pitch = pData.Pitch;
                ptr   = ((pInfo.FourCC == MFX_FOURCC_Y210 || pInfo.FourCC == MFX_FOURCC_Y216)
                             ? pData.Y
                             : (mfxU8*)pData.Y410) +
                      pInfo.CropX * 4 + pInfo.CropY * pData.Pitch;

                for (i = 0; i < h; i++) {
                    nBytesRead = (mfxU32)fread(ptr + i * pitch, 1, 4 * w, m_files[vid]);

                    if ((mfxU32)4 * w != nBytesRead) {
                        return MFX_ERR_MORE_DATA;
                    }

                    if ((MFX_FOURCC_Y210 == pInfo.FourCC || MFX_FOURCC_Y216 == pInfo.FourCC) &&
                        shouldShift10BitsHigh) {
                        mfxU16* shortPtr = (mfxU16*)(ptr + i * pitch);
                        for (int idx = 0; idx < w * 2; idx++) {
                            shortPtr[idx] <<= shiftSizeLuma;
                        }
                    }
                }
                break;
            default:
                return MFX_ERR_UNSUPPORTED;
        }
    }
    else if (MFX_FOURCC_NV12 == pInfo.FourCC || MFX_FOURCC_YV12 == pInfo.FourCC ||
             MFX_FOURCC_P010 == pInfo.FourCC || MFX_FOURCC_P210 == pInfo.FourCC ||
             MFX_FOURCC_P016 == pInfo.FourCC || MFX_FOURCC_I010 == pInfo.FourCC ||
             MFX_FOURCC_P016 == pInfo.FourCC || MFX_FOURCC_I010 == pInfo.FourCC ||
             MFX_FOURCC_I420 == pInfo.FourCC) {
        pitch = pData.Pitch;
        ptr   = pData.Y + pInfo.CropX + pInfo.CropY * pData.Pitch;

        // read luminance plane
        for (i = 0; i < h; i++) {
            nBytesRead = (mfxU32)fread(ptr + i * pitch, nBytesPerPixel, w, m_files[vid]);

            if (w != nBytesRead) {
                return MFX_ERR_MORE_DATA;
            }

            // Shifting data if required
            if ((MFX_FOURCC_P010 == pInfo.FourCC || MFX_FOURCC_P210 == pInfo.FourCC ||
                 MFX_FOURCC_P016 == pInfo.FourCC) &&
                shouldShift10BitsHigh) {
                mfxU16* shortPtr = (mfxU16*)(ptr + i * pitch);
                for (int idx = 0; idx < w; idx++) {
                    shortPtr[idx] <<= shiftSizeLuma;
                }
            }
        }

        // read chroma planes
        switch (m_ColorFormat) // color format of data in the input file
        {
            case MFX_FOURCC_I420:
            case MFX_FOURCC_YV12:
                switch (pInfo.FourCC) {
                    case MFX_FOURCC_NV12:
                        mfxU32 j, dstOffset[2];
                        w /= 2;
                        h /= 2;
                        ptr = pData.UV + pInfo.CropX + (pInfo.CropY / 2) * pitch;

                        if (m_ColorFormat == MFX_FOURCC_I420) {
                            dstOffset[0] = 0;
                            dstOffset[1] = 1;
                        }
                        else {
                            dstOffset[0] = 1;
                            dstOffset[1] = 0;
                        }

                        // load first chroma plane: U (input == I420) or V (input == YV12)
                        try {
                            std::vector<mfxU8> buf(w);
                            for (i = 0; i < h; i++) {
                                nBytesRead = (mfxU32)fread(&buf[0], 1, w, m_files[vid]);
                                if (w != nBytesRead) {
                                    return MFX_ERR_MORE_DATA;
                                }
                                for (j = 0; j < w; j++) {
                                    ptr[i * pitch + j * 2 + dstOffset[0]] = buf[j];
                                }
                            }

                            // load second chroma plane: V (input == I420) or U (input == YV12)
                            for (i = 0; i < h; i++) {
                                nBytesRead = (mfxU32)fread(&buf[0], 1, w, m_files[vid]);

                                if (w != nBytesRead) {
                                    return MFX_ERR_MORE_DATA;
                                }
                                for (j = 0; j < w; j++) {
                                    ptr[i * pitch + j * 2 + dstOffset[1]] = buf[j];
                                }
                            }
                        }
                        catch (...) {
                            return MFX_ERR_MEMORY_ALLOC;
                        }
                        break;
                    case MFX_FOURCC_YV12:
                    case MFX_FOURCC_I420:
                        w /= 2;
                        h /= 2;
                        pitch /= 2;

                        if (m_ColorFormat == MFX_FOURCC_I420) {
                            ptr  = pData.U + (pInfo.CropX / 2) + (pInfo.CropY / 2) * pitch;
                            ptr2 = pData.V + (pInfo.CropX / 2) + (pInfo.CropY / 2) * pitch;
                        }
                        else {
                            ptr  = pData.V + (pInfo.CropX / 2) + (pInfo.CropY / 2) * pitch;
                            ptr2 = pData.U + (pInfo.CropX / 2) + (pInfo.CropY / 2) * pitch;
                        }

                        for (i = 0; i < h; i++) {
                            nBytesRead = (mfxU32)fread(ptr + i * pitch, 1, w, m_files[vid]);

                            if (w != nBytesRead) {
                                return MFX_ERR_MORE_DATA;
                            }
                        }
                        for (i = 0; i < h; i++) {
                            nBytesRead = (mfxU32)fread(ptr2 + i * pitch, 1, w, m_files[vid]);

                            if (w != nBytesRead) {
                                return MFX_ERR_MORE_DATA;
                            }
                        }
                        break;
                    default:
                        return MFX_ERR_UNSUPPORTED;
                }
                break;
            case MFX_FOURCC_I010:
            case MFX_FOURCC_I210:
                h /= 2;
                pitch /= 2;

                ptr  = pData.U + (pInfo.CropX / 2) + (pInfo.CropY / 2) * pitch;
                ptr2 = pData.V + (pInfo.CropX / 2) + (pInfo.CropY / 2) * pitch;

                for (i = 0; i < h; i++) {
                    nBytesRead = (mfxU32)fread(ptr + i * pitch, 1, w, m_files[vid]);

                    if (w != nBytesRead) {
                        return MFX_ERR_MORE_DATA;
                    }
                }
                for (i = 0; i < h; i++) {
                    nBytesRead = (mfxU32)fread(ptr2 + i * pitch, 1, w, m_files[vid]);

                    if (w != nBytesRead) {
                        return MFX_ERR_MORE_DATA;
                    }
                }
                break;
            case MFX_FOURCC_NV12:
            case MFX_FOURCC_P010:
            case MFX_FOURCC_P210:
            case MFX_FOURCC_P016:
                if (MFX_FOURCC_P210 != pInfo.FourCC) {
                    h /= 2;
                }
                ptr = pData.UV + pInfo.CropX + (pInfo.CropY / 2) * pitch;
                for (i = 0; i < h; i++) {
                    nBytesRead = (mfxU32)fread(ptr + i * pitch, nBytesPerPixel, w, m_files[vid]);

                    if (w != nBytesRead) {
                        return MFX_ERR_MORE_DATA;
                    }

                    // Shifting data if required
                    if ((MFX_FOURCC_P010 == pInfo.FourCC || MFX_FOURCC_P210 == pInfo.FourCC ||
                         MFX_FOURCC_P016 == pInfo.FourCC) &&
                        shouldShift10BitsHigh) {
                        mfxU16* shortPtr = (mfxU16*)(ptr + i * pitch);
                        for (int idx = 0; idx < w; idx++) {
                            shortPtr[idx] <<= shiftSizeChroma;
                        }
                    }
                }

                break;
            default:
                return MFX_ERR_UNSUPPORTED;
        }
    }

    return MFX_ERR_NONE;
}

mfxStatus CSmplYUVReader::LoadNextFrame(mfxFrameSurface1* pSurface,
                                        int bytes_to_read,
                                        mfxU8* buf_read) {
    // check if reader is initialized
    MSDK_CHECK_POINTER(pSurface, MFX_ERR_NULL_PTR);

    mfxU32 vid = pSurface->Info.FrameId.ViewId;

    int nBytesRead = static_cast<int>(fread(buf_read, 1, bytes_to_read, m_files[vid]));

    if (bytes_to_read != nBytesRead) {
        return MFX_ERR_MORE_DATA;
    }

    mfxU16 w, h;
    mfxFrameInfo* pInfo = &pSurface->Info;
    mfxFrameData* pData = &pSurface->Data;

    w = pInfo->Width;
    h = pInfo->Height;

    switch (pInfo->FourCC) {
        case MFX_FOURCC_NV12:
            pData->Y  = buf_read;
            pData->UV = pData->Y + w * h;
            break;
        case MFX_FOURCC_I420:
            pData->Y = buf_read;
            pData->U = pData->Y + w * h;
            pData->V = pData->U + ((w / 2) * (h / 2));
            break;

        case MFX_FOURCC_P010:
            pData->Y  = buf_read;
            pData->UV = pData->Y + w * 2 * h;
            break;
        case MFX_FOURCC_I010:
            pData->Y = buf_read;
            pData->U = pData->Y + w * 2 * h;
            pData->V = pData->U + (w * (h / 2));
            break;

        case MFX_FOURCC_RGB4:
            pData->B = buf_read;
            break;
        default:
            break;
    }

    return MFX_ERR_NONE;
}

CSmplBitstreamWriter::CSmplBitstreamWriter()
        : m_nProcessedFramesNum(0),
          m_bSkipWriting(false),
          m_fSource(NULL),
          m_bInited(false),
          m_sFile() {}

CSmplBitstreamWriter::~CSmplBitstreamWriter() {
    Close();
}

void CSmplBitstreamWriter::Close() {
    if (m_fSource) {
        fclose(m_fSource);
        m_fSource = NULL;
    }

    m_bInited = false;
}

mfxStatus CSmplBitstreamWriter::Init(const msdk_char* strFileName) {
    MSDK_CHECK_POINTER(strFileName, MFX_ERR_NULL_PTR);
    if (!msdk_strlen(strFileName))
        return MFX_ERR_NONE;

    Close();

    //init file to write encoded data
    MSDK_FOPEN(m_fSource, strFileName, MSDK_STRING("wb+"));
    MSDK_CHECK_POINTER(m_fSource, MFX_ERR_NULL_PTR);

    m_sFile = msdk_string(strFileName);
    //set init state to true in case of success
    m_bInited = true;
    return MFX_ERR_NONE;
}

void CSmplBitstreamWriter::ForceInitStatus(bool status) {
    m_bInited = status;
}

mfxStatus CSmplBitstreamWriter::Reset() {
    return Init(m_sFile.c_str());
}

mfxStatus CSmplBitstreamWriter::WriteNextFrame(mfxBitstream* pMfxBitstream,
                                               bool isPrint,
                                               bool isCompleteFrame) {
    if (m_bSkipWriting)
        return MFX_ERR_NONE;

    // check if writer is initialized
    MSDK_CHECK_ERROR(m_bInited, false, MFX_ERR_NOT_INITIALIZED);
    MSDK_CHECK_POINTER(pMfxBitstream, MFX_ERR_NULL_PTR);

    if (isCompleteFrame && pMfxBitstream->DataLength) {
        mfxU32 nBytesWritten = 0;

        nBytesWritten = (mfxU32)fwrite(pMfxBitstream->Data + pMfxBitstream->DataOffset,
                                       1,
                                       pMfxBitstream->DataLength,
                                       m_fSource);
        MSDK_CHECK_NOT_EQUAL(nBytesWritten, pMfxBitstream->DataLength, MFX_ERR_UNDEFINED_BEHAVIOR);

        // mark that we don't need bit stream data any more
        pMfxBitstream->DataLength = 0;
        pMfxBitstream->DataOffset = 0;

        m_nProcessedFramesNum++;

        // print encoding progress to console every certain number of frames (not to affect performance too much)
        if (isPrint && (1 == m_nProcessedFramesNum || (0 == (m_nProcessedFramesNum % 100)))) {
            msdk_printf(MSDK_STRING("Frame number: %u\r"), (unsigned int)m_nProcessedFramesNum);
        }
    }
    else {
        // append new chunk of partial output to output buffer
    }

    return MFX_ERR_NONE;
}

mfxStatus CSmplBitstreamWriter::WriteNextFrame(mfxBitstream*, mfxU32, mfxU32) {
    return MFX_ERR_NOT_IMPLEMENTED;
}

mfxStatus CBitstreamWriterForParallelEncoding::WriteNextFrame(mfxBitstream* pMfxBitstream,
                                                              mfxU32 targetID,
                                                              mfxU32 frameNum) {
    std::unique_lock<std::mutex> guard(m_Mutex);

    mfxU32 EncoderNumber = targetID - m_BaseEncoderID;

    //sanity check
    if (m_GopSize == 0 || m_NumberOfEncoders == 0 || EncoderNumber > 64) {
        return MFX_ERR_UNDEFINED_BEHAVIOR;
    }

    mfxU32 GlobalFrameNum = m_NumberOfEncoders * m_GopSize * ((frameNum - 1) / m_GopSize) +
                            m_GopSize * EncoderNumber + (frameNum - 1) % m_GopSize;

    if (GlobalFrameNum == (mfxU32)(m_LastWrittenFrameNumber + 1)) {
        //write bitstream directly to file
        m_LastWrittenFrameNumber = GlobalFrameNum;

        if (pMfxBitstream->DataLength) {
            mfxU32 nBytesWritten = 0;
            nBytesWritten        = (mfxU32)fwrite(pMfxBitstream->Data + pMfxBitstream->DataOffset,
                                           1,
                                           pMfxBitstream->DataLength,
                                           m_fSource);
            MSDK_CHECK_NOT_EQUAL(nBytesWritten,
                                 pMfxBitstream->DataLength,
                                 MFX_ERR_UNDEFINED_BEHAVIOR);
            pMfxBitstream->DataLength = 0;
            pMfxBitstream->DataOffset = 0;
            m_nProcessedFramesNum++;
        }

        //if it has been last frame in GOP, check can we output buffered frames from other encoders
        for (bool bufferWritten = true; bufferWritten;) {
            bufferWritten = false;
            for (auto& buf : m_Buffer) {
                if (buf.second.empty()) {
                    continue;
                }

                if (m_FirstFrameInBuffer[buf.first] == (mfxU32)(m_LastWrittenFrameNumber + 1)) {
                    bufferWritten        = true;
                    mfxU32 nBytesWritten = 0;

                    nBytesWritten =
                        (mfxU32)fwrite(buf.second.data(), 1, buf.second.size(), m_fSource);
                    if (nBytesWritten != mfxU32(buf.second.size())) {
                        return MFX_ERR_UNDEFINED_BEHAVIOR;
                    }
                    buf.second.clear();
                    m_LastWrittenFrameNumber = m_LastFrameInBuffer[buf.first];
                }
            }
        }
        return MFX_ERR_NONE;
    }

    //write bitstream to buffer
    static const int timeToSleepInMilliseconds = 10;
    for (int i = 0; i < MSDK_ENC_WAIT_INTERVAL / timeToSleepInMilliseconds; i++) {
        //check if buffer holds complete GOP
        if (m_Buffer[targetID].empty() || GlobalFrameNum == m_LastFrameInBuffer[targetID] + 1) {
            if (m_Buffer[targetID].empty()) {
                m_FirstFrameInBuffer[targetID] = GlobalFrameNum;
            }
            m_LastFrameInBuffer[targetID] = GlobalFrameNum;

            m_Buffer[targetID].insert(
                m_Buffer[targetID].end(),
                pMfxBitstream->Data + pMfxBitstream->DataOffset,
                pMfxBitstream->Data + pMfxBitstream->DataOffset + pMfxBitstream->DataLength);
            return MFX_ERR_NONE;
        }

        //we have complete GOP in buffer, this channel is ahead of others, wait till buffer will be written to file
        guard.unlock();
        MSDK_SLEEP(timeToSleepInMilliseconds);
        guard.lock();
    }

    //we've failed to write frame to buffer, this happens when one of the other channels has failed or hung
    return MFX_ERR_UNDEFINED_BEHAVIOR;
}

mfxStatus CBitstreamWriterForParallelEncoding::Reset() {
    //we don't support reset for parallel encoding
    return MFX_ERR_NOT_IMPLEMENTED;
}

CSmplBitstreamDuplicateWriter::CSmplBitstreamDuplicateWriter() : CSmplBitstreamWriter() {
    m_fSourceDuplicate = NULL;
    m_bJoined          = false;
}

mfxStatus CSmplBitstreamDuplicateWriter::InitDuplicate(const msdk_char* strFileName) {
    MSDK_CHECK_POINTER(strFileName, MFX_ERR_NULL_PTR);
    MSDK_CHECK_ERROR(msdk_strlen(strFileName), 0, MFX_ERR_NOT_INITIALIZED);

    if (m_fSourceDuplicate) {
        fclose(m_fSourceDuplicate);
        m_fSourceDuplicate = NULL;
    }
    MSDK_FOPEN(m_fSourceDuplicate, strFileName, MSDK_STRING("wb+"));
    MSDK_CHECK_POINTER(m_fSourceDuplicate, MFX_ERR_NULL_PTR);

    m_bJoined = false; // mark we own the file handle

    return MFX_ERR_NONE;
}

mfxStatus CSmplBitstreamDuplicateWriter::JoinDuplicate(CSmplBitstreamDuplicateWriter* pJoinee) {
    MSDK_CHECK_POINTER(pJoinee, MFX_ERR_NULL_PTR);
    MSDK_CHECK_ERROR(pJoinee->m_fSourceDuplicate, NULL, MFX_ERR_NOT_INITIALIZED);

    m_fSourceDuplicate = pJoinee->m_fSourceDuplicate;
    m_bJoined          = true; // mark we do not own the file handle

    return MFX_ERR_NONE;
}

mfxStatus CSmplBitstreamDuplicateWriter::WriteNextFrame(mfxBitstream* pMfxBitstream, bool isPrint) {
    MSDK_CHECK_ERROR(m_fSourceDuplicate, NULL, MFX_ERR_NOT_INITIALIZED);
    MSDK_CHECK_POINTER(pMfxBitstream, MFX_ERR_NULL_PTR);

    mfxU32 nBytesWritten = (mfxU32)fwrite(pMfxBitstream->Data + pMfxBitstream->DataOffset,
                                          1,
                                          pMfxBitstream->DataLength,
                                          m_fSourceDuplicate);
    MSDK_CHECK_NOT_EQUAL(nBytesWritten, pMfxBitstream->DataLength, MFX_ERR_UNDEFINED_BEHAVIOR);

    CSmplBitstreamWriter::WriteNextFrame(pMfxBitstream, isPrint);

    return MFX_ERR_NONE;
}

void CSmplBitstreamDuplicateWriter::Close() {
    if (m_fSourceDuplicate && !m_bJoined) {
        fclose(m_fSourceDuplicate);
    }

    m_fSourceDuplicate = NULL;
    m_bJoined          = false;

    CSmplBitstreamWriter::Close();
}

CSmplBitstreamReader::CSmplBitstreamReader() {
    m_fSource = NULL;
    m_bInited = false;
}

CSmplBitstreamReader::~CSmplBitstreamReader() {
    Close();
}

void CSmplBitstreamReader::Close() {
    if (m_fSource) {
        fclose(m_fSource);
        m_fSource = NULL;
    }

    m_bInited = false;
}

void CSmplBitstreamReader::Reset() {
    if (!m_bInited)
        return;

    fseek(m_fSource, 0, SEEK_SET);
}

mfxStatus CSmplBitstreamReader::Init(const msdk_char* strFileName) {
    MSDK_CHECK_POINTER(strFileName, MFX_ERR_NULL_PTR);
    if (!msdk_strlen(strFileName))
        return MFX_ERR_NONE;

    Close();

    //open file to read input stream
    MSDK_FOPEN(m_fSource, strFileName, MSDK_STRING("rb"));
    MSDK_CHECK_POINTER(m_fSource, MFX_ERR_NULL_PTR);

    m_bInited = true;
    return MFX_ERR_NONE;
}

#define CHECK_SET_EOS(pBitstream)                  \
    if (feof(m_fSource)) {                         \
        pBitstream->DataFlag |= MFX_BITSTREAM_EOS; \
    }

mfxStatus CSmplBitstreamReader::ReadNextFrame(mfxBitstream* pBS) {
    if (!m_bInited)
        return MFX_ERR_NOT_INITIALIZED;

    MSDK_CHECK_POINTER(pBS, MFX_ERR_NULL_PTR);

    // Not enough memory to read new chunk of data
    if (pBS->MaxLength == pBS->DataLength)
        return MFX_ERR_NOT_ENOUGH_BUFFER;

    memmove(pBS->Data, pBS->Data + pBS->DataOffset, pBS->DataLength);
    pBS->DataOffset = 0;
    mfxU32 nBytesRead =
        (mfxU32)fread(pBS->Data + pBS->DataLength, 1, pBS->MaxLength - pBS->DataLength, m_fSource);

    CHECK_SET_EOS(pBS);

    if (0 == nBytesRead) {
        return MFX_ERR_MORE_DATA;
    }

    pBS->DataLength += nBytesRead;

    return MFX_ERR_NONE;
}

mfxU32 CJPEGFrameReader::FindMarker(mfxBitstream* pBS,
                                    mfxU32 startOffset,
                                    CJPEGFrameReader::JPEGMarker marker) {
    for (mfxU32 i = startOffset; i + sizeof(mfxU16) <= pBS->DataLength; i++) {
        if (*(mfxU16*)(pBS->Data + i) == (mfxU16)marker) {
            return i;
        }
    }
    return 0xFFFFFFFF;
}

mfxStatus CJPEGFrameReader::ReadNextFrame(mfxBitstream* pBS) {
    mfxStatus sts    = MFX_ERR_NONE;
    mfxU32 offsetSOI = 0xFFFFFFFF;

    pBS->DataFlag = MFX_BITSTREAM_COMPLETE_FRAME;

    while ((offsetSOI = FindMarker(pBS, pBS->DataOffset, CJPEGFrameReader::SOI)) == 0xFFFFFFFF &&
           sts == MFX_ERR_NONE) {
        sts = CSmplBitstreamReader::ReadNextFrame(pBS);
    }

    //--- Finding EOI of frame, to make sure that it is complete
    while (FindMarker(pBS, offsetSOI, CJPEGFrameReader::EOI) == 0xFFFFFFFF && sts == MFX_ERR_NONE) {
        sts = CSmplBitstreamReader::ReadNextFrame(pBS);
    }

    return sts;
}

CIVFFrameReader::CIVFFrameReader() {
    MSDK_ZERO_MEMORY(m_hdr);
}

#define READ_BYTES(pBuf, size)                                       \
    {                                                                \
        mfxU32 nBytesRead = (mfxU32)fread(pBuf, 1, size, m_fSource); \
        if (nBytesRead != size)                                      \
            return MFX_ERR_MORE_DATA;                                \
    }

mfxStatus CIVFFrameReader::ReadHeader() {
    // read and skip IVF header
    READ_BYTES(&m_hdr.dkif, sizeof(m_hdr.dkif));
    READ_BYTES(&m_hdr.version, sizeof(m_hdr.version));
    READ_BYTES(&m_hdr.header_len, sizeof(m_hdr.header_len));
    READ_BYTES(&m_hdr.codec_FourCC, sizeof(m_hdr.codec_FourCC));
    READ_BYTES(&m_hdr.width, sizeof(m_hdr.width));
    READ_BYTES(&m_hdr.height, sizeof(m_hdr.height));
    READ_BYTES(&m_hdr.frame_rate, sizeof(m_hdr.frame_rate));
    READ_BYTES(&m_hdr.time_scale, sizeof(m_hdr.time_scale));
    READ_BYTES(&m_hdr.num_frames, sizeof(m_hdr.num_frames));
    READ_BYTES(&m_hdr.unused, sizeof(m_hdr.unused));
    MSDK_CHECK_NOT_EQUAL(fseek(m_fSource, m_hdr.header_len, SEEK_SET), 0, MFX_ERR_UNSUPPORTED);
    return MFX_ERR_NONE;
}

void CIVFFrameReader::Reset() {
    CSmplBitstreamReader::Reset();
    std::ignore = ReadHeader();
}

mfxStatus CIVFFrameReader::Init(const msdk_char* strFileName) {
    mfxStatus sts = CSmplBitstreamReader::Init(strFileName);
    MSDK_CHECK_STATUS(sts, "CSmplBitstreamReader::Init failed");

    sts = ReadHeader();
    MSDK_CHECK_STATUS(sts, "CIVFFrameReader::ReadHeader failed");

    // check header
    MSDK_CHECK_NOT_EQUAL(MFX_MAKEFOURCC('D', 'K', 'I', 'F'), m_hdr.dkif, MFX_ERR_UNSUPPORTED);
    if ((m_hdr.codec_FourCC != MFX_MAKEFOURCC('V', 'P', '8', '0')) &&
        (m_hdr.codec_FourCC != MFX_MAKEFOURCC('V', 'P', '9', '0')) &&
        (m_hdr.codec_FourCC != MFX_MAKEFOURCC('A', 'V', '0', '1'))) {
        return MFX_ERR_UNSUPPORTED;
    }

    return MFX_ERR_NONE;
}

// reads a complete frame into given bitstream
mfxStatus CIVFFrameReader::ReadNextFrame(mfxBitstream* pBS) {
    MSDK_CHECK_POINTER(pBS, MFX_ERR_NULL_PTR);

    memmove(pBS->Data, pBS->Data + pBS->DataOffset, pBS->DataLength);
    pBS->DataOffset = 0;
    pBS->DataFlag   = MFX_BITSTREAM_COMPLETE_FRAME;

    /*bytes pos-(pos+3)                       size of frame in bytes (not including the 12-byte header)
      bytes (pos+4)-(pos+11)                  64-bit presentation timestamp
      bytes (pos+12)-(pos+12+nBytesInFrame)   frame data
    */

    mfxU32 nBytesInFrame = 0;
    mfxU64 nTimeStamp    = 0;

    // read frame size
    READ_BYTES(&nBytesInFrame, sizeof(nBytesInFrame));
    CHECK_SET_EOS(pBS);

    //check if bitstream has enough space to hold the frame
    if (nBytesInFrame > pBS->MaxLength - pBS->DataLength - pBS->DataOffset) {
        fseek(m_fSource, -long(sizeof(nBytesInFrame)), SEEK_CUR);
        return MFX_ERR_NOT_ENOUGH_BUFFER;
    }

    // read time stamp
    READ_BYTES(&nTimeStamp, sizeof(nTimeStamp));
    CHECK_SET_EOS(pBS);

    // read frame data
    READ_BYTES(pBS->Data + pBS->DataOffset + pBS->DataLength, nBytesInFrame);
    CHECK_SET_EOS(pBS);
    pBS->DataLength += nBytesInFrame;

    // it is application's responsibility to make sure the bitstream contains a single complete frame and nothing else
    // application has to provide input pBS with pBS->DataLength = 0

    return MFX_ERR_NONE;
}

CIVFFrameWriter::CIVFFrameWriter() {
    MSDK_ZERO_MEMORY(m_streamHeader);
    MSDK_ZERO_MEMORY(m_frameHeader);
    m_frameNum = 0;
}

mfxStatus CIVFFrameWriter::WriteStreamHeader() {
    mfxU32 nBytesWritten = (mfxU32)fwrite(&m_streamHeader, 1, sizeof(m_streamHeader), m_fSource);
    if (nBytesWritten != sizeof(m_streamHeader))
        return MFX_ERR_MORE_BITSTREAM;

    return MFX_ERR_NONE;
}

mfxStatus CIVFFrameWriter::WriteFrameHeader() {
    mfxU32 nBytesWritten = (mfxU32)fwrite(&m_frameHeader, 1, sizeof(m_frameHeader), m_fSource);
    if (nBytesWritten != sizeof(m_frameHeader))
        return MFX_ERR_MORE_BITSTREAM;

    return MFX_ERR_NONE;
}

void CIVFFrameWriter::UpdateNumberOfFrames() {
    if (m_fSource) {
        fseek(m_fSource, 24, SEEK_SET);
        fwrite(&m_frameNum, 1, sizeof(mfxU32), m_fSource);
    }
}

mfxStatus CIVFFrameWriter::Reset() {
    mfxStatus sts = CSmplBitstreamWriter::Reset();
    MSDK_CHECK_STATUS(sts, "CSmplBitstreamWriter::Reset() failed");
    sts = WriteStreamHeader();
    MSDK_CHECK_STATUS(sts, "CIVFFrameWriter::WriteStreamHeader() failed");

    return MFX_ERR_NONE;
}

mfxStatus CIVFFrameWriter::Init(const msdk_char* strFileName,
                                const mfxU16 w,
                                const mfxU16 h,
                                const mfxU32 fr_nom,
                                const mfxU32 fr_denom) {
    mfxStatus sts = CSmplBitstreamWriter::Init(strFileName);
    MSDK_CHECK_STATUS(sts, "CSmplBitstreamWriter::Init failed");

    m_streamHeader.dkif         = MFX_MAKEFOURCC('D', 'K', 'I', 'F');
    m_streamHeader.header_len   = sizeof(m_streamHeader);
    m_streamHeader.codec_FourCC = MFX_MAKEFOURCC('A', 'V', '0', '1');
    m_streamHeader.width        = w;
    m_streamHeader.height       = h;
    m_streamHeader.frame_rate   = fr_nom;
    m_streamHeader.time_scale   = fr_denom;

    sts = WriteStreamHeader();
    MSDK_CHECK_STATUS(sts, "CIVFFrameWriter::WriteStreamHeader failed");

    return MFX_ERR_NONE;
}

// write a complete frame into given bitstream
mfxStatus CIVFFrameWriter::WriteNextFrame(mfxBitstream* pMfxBitstream, bool isPrint) {
    MSDK_CHECK_ERROR(m_fSource, NULL, MFX_ERR_NOT_INITIALIZED);
    MSDK_CHECK_POINTER(pMfxBitstream, MFX_ERR_NULL_PTR);

    if (pMfxBitstream->DataLength) {
        m_frameHeader.frame_size = pMfxBitstream->DataLength;
        m_frameHeader.pts_low    = (mfxU32)(m_frameNum & 0xFFFFFFFF);
        m_frameHeader.pts_high   = (mfxU32)(m_frameNum >> 32);

        WriteFrameHeader();

        CSmplBitstreamWriter::WriteNextFrame(pMfxBitstream, isPrint);

        m_frameNum++;
    }

    return MFX_ERR_NONE;
}

void CIVFFrameWriter::Close() {
    UpdateNumberOfFrames();
    CSmplBitstreamWriter::Close();
}

CSmplYUVWriter::CSmplYUVWriter()
        : m_fDest(NULL),
          m_fDestMVC(NULL),
          m_bInited(false),
          m_bIsMultiView(false),
          m_numCreatedFiles(0),
          m_sFile(),
          m_nViews(0){};

mfxStatus CSmplYUVWriter::Init(const msdk_char* strFileName, const mfxU32 numViews) {
    MSDK_CHECK_POINTER(strFileName, MFX_ERR_NULL_PTR);
    MSDK_CHECK_ERROR(msdk_strlen(strFileName), 0, MFX_ERR_NOT_INITIALIZED);

    m_sFile  = msdk_string(strFileName);
    m_nViews = numViews;

    Close();

    //open file to write decoded data

    if (!m_bIsMultiView) {
        MSDK_FOPEN(m_fDest, m_sFile.c_str(), MSDK_STRING("wb"));
        MSDK_CHECK_POINTER(m_fDest, MFX_ERR_NULL_PTR);
        ++m_numCreatedFiles;
    }
    else {
        mfxU32 i;

        MSDK_CHECK_ERROR(numViews, 0, MFX_ERR_NOT_INITIALIZED);

        m_fDestMVC = new FILE*[numViews];
        for (i = 0; i < numViews; ++i) {
            MSDK_FOPEN(m_fDestMVC[i],
                       FormMVCFileName(m_sFile.c_str(), i).c_str(),
                       MSDK_STRING("wb"));
            MSDK_CHECK_POINTER(m_fDestMVC[i], MFX_ERR_NULL_PTR);
            ++m_numCreatedFiles;
        }
    }

    m_bInited = true;

    return MFX_ERR_NONE;
}

mfxStatus CSmplYUVWriter::Reset() {
    if (!m_bInited)
        return MFX_ERR_NONE;

    return Init(m_sFile.c_str(), m_nViews);
}

CSmplYUVWriter::~CSmplYUVWriter() {
    Close();
}

void CSmplYUVWriter::Close() {
    if (m_fDest) {
        fclose(m_fDest);
        m_fDest = NULL;
    }

    if (m_fDestMVC) {
        mfxU32 i = 0;
        for (i = 0; i < m_numCreatedFiles; ++i) {
            if (m_fDestMVC[i] != NULL) {
                fclose(m_fDestMVC[i]);
                m_fDestMVC[i] = NULL;
            }
        }
        delete[] m_fDestMVC;
        m_fDestMVC = NULL;
    }

    m_numCreatedFiles = 0;
    m_bInited         = false;
}

mfxStatus GetChromaSize(const mfxFrameInfo& pInfo, mfxU32& ChromaW, mfxU32& ChromaH) {
    switch (pInfo.FourCC) {
        case MFX_FOURCC_I420:
        case MFX_FOURCC_YV12: {
            ChromaW = (pInfo.CropW + 1) / 2;
            ChromaH = (pInfo.CropH + 1) / 2;
            break;
        }
        case MFX_FOURCC_I422: {
            ChromaW = (pInfo.CropW + 1) / 2;
            ChromaH = (pInfo.CropH);
            break;
        }
        case MFX_FOURCC_NV12: {
            ChromaW = (pInfo.CropW % 2) ? (pInfo.CropW + 1) : pInfo.CropW;
            ChromaH = (pInfo.CropH + 1) / 2;
            break;
        }
        case MFX_FOURCC_I010:
        case MFX_FOURCC_P010:
        case MFX_FOURCC_P016: {
            ChromaW = (pInfo.CropW % 2) ? (pInfo.CropW + 1) : pInfo.CropW;
            ChromaH = (mfxU32)(pInfo.CropH + 1) / 2;
            break;
        }

        case MFX_FOURCC_I210:
        case MFX_FOURCC_P210:
        case MFX_FOURCC_Y210:
        case MFX_FOURCC_Y216: {
            ChromaW = (pInfo.CropW % 2) ? (pInfo.CropW + 1) : pInfo.CropW;
            ChromaH = pInfo.CropH;
            break;
        }

        case MFX_FOURCC_RGB4:
        case MFX_FOURCC_AYUV:
        case MFX_FOURCC_YUY2:
        case MFX_FOURCC_NV16:
        case MFX_FOURCC_A2RGB10:
        case MFX_FOURCC_Y410:
        case MFX_FOURCC_Y416: {
            if (pInfo.CropH > 0 && pInfo.CropW > 0) {
                ChromaW = pInfo.FourCC == MFX_FOURCC_YUY2 ? (pInfo.CropW + 1) / 2 : pInfo.CropW;
                ChromaH = pInfo.CropH;
            }
            else {
                ChromaW = pInfo.FourCC == MFX_FOURCC_YUY2 ? (pInfo.Width + 1) / 2 : pInfo.Width;
                ChromaH = pInfo.Height;
            }
            break;
        }

        default:
            return MFX_ERR_UNSUPPORTED;
    }

    return MFX_ERR_NONE;
}

mfxStatus CSmplYUVWriter::WriteNextFrame(mfxFrameSurface1* pSurface) {
    MSDK_CHECK_ERROR(m_bInited, false, MFX_ERR_NOT_INITIALIZED);
    MSDK_CHECK_POINTER(pSurface, MFX_ERR_NULL_PTR);

    mfxFrameInfo& pInfo = pSurface->Info;
    mfxFrameData& pData = pSurface->Data;

    mfxU32 i;
    mfxU32 vid = pInfo.FrameId.ViewId;

    mfxU32 shiftSizeLuma   = 16 - pInfo.BitDepthLuma;
    mfxU32 shiftSizeChroma = 16 - pInfo.BitDepthChroma;
    // Temporary buffer to convert MS to no-MS format
    std::vector<mfxU16> tmp;

    if (!m_bIsMultiView) {
        MSDK_CHECK_POINTER(m_fDest, MFX_ERR_NULL_PTR);
    }
    else {
        MSDK_CHECK_POINTER(m_fDestMVC, MFX_ERR_NULL_PTR);
        MSDK_CHECK_POINTER(m_fDestMVC[vid], MFX_ERR_NULL_PTR);
    }

    FILE* dstFile = m_bIsMultiView ? m_fDestMVC[vid] : m_fDest;

    mfxU32 ChromaW, ChromaH;
    if (MFX_ERR_NONE != GetChromaSize(pInfo, ChromaW, ChromaH))
        return MFX_ERR_UNSUPPORTED;

    switch (pInfo.FourCC) {
        case MFX_FOURCC_YV12:
        case MFX_FOURCC_NV12:
        case MFX_FOURCC_I420:
        case MFX_FOURCC_I422:
        case MFX_FOURCC_NV16:
            for (i = 0; i < pInfo.CropH; i++) {
                MSDK_CHECK_NOT_EQUAL(
                    fwrite(pData.Y + (pInfo.CropY * pData.Pitch + pInfo.CropX) + i * pData.Pitch,
                           1,
                           pInfo.CropW,
                           dstFile),
                    pInfo.CropW,
                    MFX_ERR_UNDEFINED_BEHAVIOR);
            }
            break;
        case MFX_FOURCC_Y210:
        case MFX_FOURCC_Y216: // Luma and chroma will be filled below
        {
            for (i = 0; i < pInfo.CropH; i++) {
                mfxU8* pBuffer = ((mfxU8*)pData.Y) + (pInfo.CropY * pData.Pitch + pInfo.CropX * 4) +
                                 i * pData.Pitch;
                if (pInfo.Shift) {
                    // Bits will be shifted to the lower position
                    tmp.resize(pInfo.CropW * 2);

                    for (int idx = 0; idx < pInfo.CropW * 2; idx++) {
                        tmp[idx] = ((mfxU16*)pBuffer)[idx] >> shiftSizeLuma;
                    }

                    MSDK_CHECK_NOT_EQUAL(
                        fwrite(((const mfxU8*)tmp.data()), 4, pInfo.CropW, dstFile),
                        pInfo.CropW,
                        MFX_ERR_UNDEFINED_BEHAVIOR);
                }
                else {
                    MSDK_CHECK_NOT_EQUAL(fwrite(pBuffer, 4, pInfo.CropW, dstFile),
                                         pInfo.CropW,
                                         MFX_ERR_UNDEFINED_BEHAVIOR);
                }
            }
            return MFX_ERR_NONE;
        } break;
        case MFX_FOURCC_Y410: // Luma and chroma will be filled below
        {
            mfxU8* pBuffer = (mfxU8*)pData.Y410;
            for (i = 0; i < pInfo.CropH; i++) {
                MSDK_CHECK_NOT_EQUAL(
                    fwrite(
                        pBuffer + (pInfo.CropY * pData.Pitch + pInfo.CropX * 4) + i * pData.Pitch,
                        4,
                        pInfo.CropW,
                        dstFile),
                    pInfo.CropW,
                    MFX_ERR_UNDEFINED_BEHAVIOR);
            }
            return MFX_ERR_NONE;
        } break;
#if (MFX_VERSION >= MFX_VERSION_NEXT)
        case MFX_FOURCC_Y416: // Luma and chroma will be filled below
        {
            for (i = 0; i < pInfo.CropH; i++) {
                mfxU8* pBuffer = ((mfxU8*)pData.U) + (pInfo.CropY * pData.Pitch + pInfo.CropX * 8) +
                                 i * pData.Pitch;
                if (pInfo.Shift) {
                    tmp.resize(pInfo.CropW * 4);

                    for (int idx = 0; idx < pInfo.CropW * 4; idx++) {
                        tmp[idx] = ((mfxU16*)pBuffer)[idx] >> shiftSizeLuma;
                    }

                    MSDK_CHECK_NOT_EQUAL(
                        fwrite(((const mfxU8*)tmp.data()), 8, pInfo.CropW, dstFile),
                        pInfo.CropW,
                        MFX_ERR_UNDEFINED_BEHAVIOR);
                }
                else {
                    MSDK_CHECK_NOT_EQUAL(fwrite(pBuffer, 8, pInfo.CropW, dstFile),
                                         pInfo.CropW,
                                         MFX_ERR_UNDEFINED_BEHAVIOR);
                }
            }
            return MFX_ERR_NONE;
        } break;
#endif
        case MFX_FOURCC_I010:
        case MFX_FOURCC_I210:
            for (i = 0; i < pInfo.CropH; i++) {
                mfxU16* shortPtr = (mfxU16*)(pData.Y + (pInfo.CropY * pData.Pitch + pInfo.CropX) +
                                             i * pData.Pitch);
                MSDK_CHECK_NOT_EQUAL(fwrite(shortPtr, 1, (mfxU32)pInfo.CropW * 2, dstFile),
                                     (mfxU32)pInfo.CropW * 2,
                                     MFX_ERR_UNDEFINED_BEHAVIOR);
            }
            break;
        case MFX_FOURCC_P010:
#if (MFX_VERSION >= MFX_VERSION_NEXT)
        case MFX_FOURCC_P016:
#endif
        case MFX_FOURCC_P210: {
            for (i = 0; i < pInfo.CropH; i++) {
                mfxU16* shortPtr = (mfxU16*)(pData.Y + (pInfo.CropY * pData.Pitch + pInfo.CropX) +
                                             i * pData.Pitch);
                if (pInfo.Shift) {
                    // Convert MS-P*1* to P*1* and write
                    // Bits will be shifted to the lower position
                    tmp.resize(pData.Pitch);

                    for (int idx = 0; idx < pInfo.CropW; idx++) {
                        tmp[idx] = shortPtr[idx] >> shiftSizeLuma;
                    }

                    MSDK_CHECK_NOT_EQUAL(fwrite(&tmp[0], 1, (mfxU32)pInfo.CropW * 2, dstFile),
                                         (mfxU32)pInfo.CropW * 2,
                                         MFX_ERR_UNDEFINED_BEHAVIOR);
                }
                else {
                    MSDK_CHECK_NOT_EQUAL(fwrite(shortPtr, 1, (mfxU32)pInfo.CropW * 2, dstFile),
                                         (mfxU32)pInfo.CropW * 2,
                                         MFX_ERR_UNDEFINED_BEHAVIOR);
                }
            }

            break;
        }
        case MFX_FOURCC_RGB4:
        case MFX_FOURCC_AYUV:
        case MFX_FOURCC_A2RGB10:
        case MFX_FOURCC_YUY2:
            // Implementation for these formats is in the next switch below
            break;

        default:
            return MFX_ERR_UNSUPPORTED;
    }
    switch (pInfo.FourCC) {
        case MFX_FOURCC_YV12: {
            for (i = 0; i < ChromaH; i++) {
                MSDK_CHECK_NOT_EQUAL(
                    fwrite(pData.V + (pInfo.CropY * pData.Pitch / 2 + pInfo.CropX / 2) +
                               i * pData.Pitch,
                           1,
                           ChromaW,
                           dstFile),
                    ChromaW,
                    MFX_ERR_UNDEFINED_BEHAVIOR);
            }
            for (i = 0; i < ChromaH; i++) {
                MSDK_CHECK_NOT_EQUAL(
                    fwrite(pData.U + (pInfo.CropY * pData.Pitch / 2 + pInfo.CropX / 2) +
                               i * pData.Pitch / 2,
                           1,
                           ChromaW,
                           dstFile),
                    ChromaW,
                    MFX_ERR_UNDEFINED_BEHAVIOR);
            }
            break;
        }
        case MFX_FOURCC_I420:
        case MFX_FOURCC_I422: {
            for (i = 0; i < ChromaH; i++) {
                MSDK_CHECK_NOT_EQUAL(
                    fwrite(pData.U + (pInfo.CropY * pData.Pitch / 2 + pInfo.CropX / 2) +
                               i * pData.Pitch / 2,
                           1,
                           ChromaW,
                           dstFile),
                    ChromaW,
                    MFX_ERR_UNDEFINED_BEHAVIOR);
            }
            for (i = 0; i < ChromaH; i++) {
                MSDK_CHECK_NOT_EQUAL(
                    fwrite(pData.V + (pInfo.CropY * pData.Pitch / 2 + pInfo.CropX / 2) +
                               i * pData.Pitch / 2,
                           1,
                           ChromaW,
                           dstFile),
                    ChromaW,
                    MFX_ERR_UNDEFINED_BEHAVIOR);
            }
            break;
        }
        case MFX_FOURCC_NV12: {
            for (i = 0; i < ChromaH; i++) {
                MSDK_CHECK_NOT_EQUAL(
                    fwrite(pData.UV + (pInfo.CropY * pData.Pitch + pInfo.CropX) + i * pData.Pitch,
                           1,
                           ChromaW,
                           dstFile),
                    ChromaW,
                    MFX_ERR_UNDEFINED_BEHAVIOR);
            }
            break;
        }
        case MFX_FOURCC_NV16: {
            for (i = 0; i < ChromaH; i++) {
                MSDK_CHECK_NOT_EQUAL(
                    fwrite(
                        pData.UV + (pInfo.CropY * pData.Pitch / 2 + pInfo.CropX) + i * pData.Pitch,
                        1,
                        ChromaW,
                        dstFile),
                    ChromaW,
                    MFX_ERR_UNDEFINED_BEHAVIOR);
            }
            break;
        }
        case MFX_FOURCC_I010:
        case MFX_FOURCC_I210: {
            mfxU16 chPitch = pData.Pitch / 2;
            mfxU32 basePtr = (pInfo.CropY * chPitch + pInfo.CropX / 2);

            for (i = 0; i < ChromaH; i++) {
                MSDK_CHECK_NOT_EQUAL(fwrite(pData.U + basePtr + i * chPitch, 1, ChromaW, dstFile),
                                     ChromaW,
                                     MFX_ERR_UNDEFINED_BEHAVIOR);
            }

            basePtr = (pInfo.CropY * chPitch + pInfo.CropX / 2);

            for (i = 0; i < ChromaH; i++) {
                MSDK_CHECK_NOT_EQUAL(fwrite(pData.V + basePtr + i * chPitch, 1, ChromaW, dstFile),
                                     ChromaW,
                                     MFX_ERR_UNDEFINED_BEHAVIOR);
            }
            break;
        }
        case MFX_FOURCC_P010:
#if (MFX_VERSION >= MFX_VERSION_NEXT)
        case MFX_FOURCC_P016:
#endif
        case MFX_FOURCC_P210: {
            for (i = 0; i < ChromaH; i++) {
                mfxU16* shortPtr =
                    (mfxU16*)(pData.UV + (pInfo.CropY * pData.Pitch + pInfo.CropX * 2) +
                              i * pData.Pitch);
                if (pInfo.Shift) {
                    // Convert MS-P*1* to P*1* and write
                    // Bits will be shifted to the lower position
                    tmp.resize(pData.Pitch);

                    for (mfxU32 idx = 0; idx < ChromaW; idx++) {
                        tmp[idx] = shortPtr[idx] >> shiftSizeChroma;
                    }

                    MSDK_CHECK_NOT_EQUAL(fwrite(&tmp[0], 1, ChromaW * 2, dstFile),
                                         (mfxU32)ChromaW * 2,
                                         MFX_ERR_UNDEFINED_BEHAVIOR);
                }
                else {
                    MSDK_CHECK_NOT_EQUAL(fwrite(shortPtr, 1, ChromaW * 2, dstFile),
                                         ChromaW * 2,
                                         MFX_ERR_UNDEFINED_BEHAVIOR);
                }
            }
            break;
        }

        case MFX_FOURCC_RGB4:
        case MFX_FOURCC_AYUV:
        case MFX_FOURCC_YUY2:
        case MFX_FOURCC_A2RGB10: {
            mfxU8* ptr;
            ptr = std::min({ pData.R, pData.G, pData.B });
            ptr = ptr + pInfo.CropX + pInfo.CropY * pData.Pitch;

            for (i = 0; i < ChromaH; i++) {
                MSDK_CHECK_NOT_EQUAL(fwrite(ptr + i * pData.Pitch, 1, 4 * ChromaW, dstFile),
                                     4 * ChromaW,
                                     MFX_ERR_UNDEFINED_BEHAVIOR);
            }
            fflush(dstFile);
            break;
        }

        default:
            return MFX_ERR_UNSUPPORTED;
    }

    return MFX_ERR_NONE;
}

mfxStatus CSmplYUVWriter::WriteNextFrameI420(mfxFrameSurface1* pSurface) {
    MSDK_CHECK_ERROR(m_bInited, false, MFX_ERR_NOT_INITIALIZED);
    MSDK_CHECK_POINTER(pSurface, MFX_ERR_NULL_PTR);

    mfxFrameInfo& pInfo = pSurface->Info;
    mfxFrameData& pData = pSurface->Data;

    mfxU32 i, j;
    mfxU32 vid = pInfo.FrameId.ViewId;

    if (!m_bIsMultiView) {
        MSDK_CHECK_POINTER(m_fDest, MFX_ERR_NULL_PTR);
    }
    else {
        MSDK_CHECK_POINTER(m_fDestMVC, MFX_ERR_NULL_PTR);
        MSDK_CHECK_POINTER(m_fDestMVC[vid], MFX_ERR_NULL_PTR);
    }

    mfxU32 ChromaW, ChromaH;
    if (MFX_ERR_NONE != GetChromaSize(pInfo, ChromaW, ChromaH))
        return MFX_ERR_UNSUPPORTED;

    // Write Y
    switch (pInfo.FourCC) {
        case MFX_FOURCC_YV12:
        case MFX_FOURCC_NV12: {
            for (i = 0; i < pInfo.CropH; i++) {
                if (!m_bIsMultiView) {
                    MSDK_CHECK_NOT_EQUAL(
                        fwrite(
                            pData.Y + (pInfo.CropY * pData.Pitch + pInfo.CropX) + i * pData.Pitch,
                            1,
                            pInfo.CropW,
                            m_fDest),
                        pInfo.CropW,
                        MFX_ERR_UNDEFINED_BEHAVIOR);
                }
                else {
                    MSDK_CHECK_NOT_EQUAL(
                        fwrite(
                            pData.Y + (pInfo.CropY * pData.Pitch + pInfo.CropX) + i * pData.Pitch,
                            1,
                            pInfo.CropW,
                            m_fDestMVC[vid]),
                        pInfo.CropW,
                        MFX_ERR_UNDEFINED_BEHAVIOR);
                }
            }
            break;
        }
        default: {
            msdk_printf(MSDK_STRING("ERROR: I420 output is accessible only for NV12 and YV12.\n"));
            return MFX_ERR_UNSUPPORTED;
        }
    }

    // Write U and V
    switch (pInfo.FourCC) {
        case MFX_FOURCC_YV12: {
            for (i = 0; i < ChromaH; i++) {
                if (!m_bIsMultiView) {
                    MSDK_CHECK_NOT_EQUAL(
                        fwrite(pData.U + (pInfo.CropY * pData.Pitch / 2 + pInfo.CropX / 2) +
                                   i * pData.Pitch / 2,
                               1,
                               ChromaW,
                               m_fDest),
                        (mfxU32)pInfo.CropW / 2,
                        MFX_ERR_UNDEFINED_BEHAVIOR);
                }
                else {
                    MSDK_CHECK_NOT_EQUAL(
                        fwrite(pData.U + (pInfo.CropY * pData.Pitch / 2 + pInfo.CropX / 2) +
                                   i * pData.Pitch / 2,
                               1,
                               ChromaW,
                               m_fDestMVC[vid]),
                        (mfxU32)pInfo.CropW / 2,
                        MFX_ERR_UNDEFINED_BEHAVIOR);
                }
            }
            for (i = 0; i < ChromaH; i++) {
                if (!m_bIsMultiView) {
                    MSDK_CHECK_NOT_EQUAL(
                        fwrite(pData.V + (pInfo.CropY * pData.Pitch / 2 + pInfo.CropX / 2) +
                                   i * pData.Pitch / 2,
                               1,
                               ChromaW,
                               m_fDest),
                        (mfxU32)pInfo.CropW / 2,
                        MFX_ERR_UNDEFINED_BEHAVIOR);
                }
                else {
                    MSDK_CHECK_NOT_EQUAL(
                        fwrite(pData.V + (pInfo.CropY * pData.Pitch / 2 + pInfo.CropX / 2) +
                                   i * pData.Pitch / 2,
                               1,
                               ChromaW,
                               m_fDestMVC[vid]),
                        (mfxU32)pInfo.CropW / 2,
                        MFX_ERR_UNDEFINED_BEHAVIOR);
                }
            }
            break;
        }
        case MFX_FOURCC_NV12: {
            for (i = 0; i < ChromaH; i++) {
                for (j = 0; j < ChromaW; j += 2) {
                    if (!m_bIsMultiView) {
                        MSDK_CHECK_NOT_EQUAL(
                            fwrite(pData.UV + (pInfo.CropY * pData.Pitch / 2 + pInfo.CropX) +
                                       i * pData.Pitch + j,
                                   1,
                                   1,
                                   m_fDest),
                            1,
                            MFX_ERR_UNDEFINED_BEHAVIOR);
                    }
                    else {
                        MSDK_CHECK_NOT_EQUAL(
                            fwrite(pData.UV + (pInfo.CropY * pData.Pitch / 2 + pInfo.CropX) +
                                       i * pData.Pitch + j,
                                   1,
                                   1,
                                   m_fDestMVC[vid]),
                            1,
                            MFX_ERR_UNDEFINED_BEHAVIOR);
                    }
                }
            }
            for (i = 0; i < ChromaH; i++) {
                for (j = 1; j < ChromaW; j += 2) {
                    if (!m_bIsMultiView) {
                        MSDK_CHECK_NOT_EQUAL(
                            fwrite(pData.UV + (pInfo.CropY * pData.Pitch / 2 + pInfo.CropX) +
                                       i * pData.Pitch + j,
                                   1,
                                   1,
                                   m_fDest),
                            1,
                            MFX_ERR_UNDEFINED_BEHAVIOR);
                    }
                    else {
                        MSDK_CHECK_NOT_EQUAL(
                            fwrite(pData.UV + (pInfo.CropY * pData.Pitch / 2 + pInfo.CropX) +
                                       i * pData.Pitch + j,
                                   1,
                                   1,
                                   m_fDestMVC[vid]),
                            1,
                            MFX_ERR_UNDEFINED_BEHAVIOR);
                    }
                }
            }
            break;
        }
        default: {
            msdk_printf(MSDK_STRING("ERROR: I420 output is accessible only for NV12 and YV12.\n"));
            return MFX_ERR_UNSUPPORTED;
        }
    }

    return MFX_ERR_NONE;
}

void QPFile::Reader::ResetState() {
    ResetState(READER_ERR_NOT_INITIALIZED);
}

void QPFile::Reader::ResetState(ReaderStatus set_sts) {
    m_CurFrameNum = std::numeric_limits<mfxU32>::max();
    m_nFrames     = std::numeric_limits<mfxU32>::max();
    m_ReaderSts   = set_sts;
    m_FrameVals.clear();
}

mfxStatus QPFile::Reader::Read(const msdk_string& strFileName, mfxU32 codecid) {
    m_ReaderSts   = READER_ERR_NONE;
    m_CurFrameNum = 0;

    if (codecid != MFX_CODEC_AVC && codecid != MFX_CODEC_HEVC) {
        ResetState(READER_ERR_CODEC_UNSUPPORTED);
        return MFX_ERR_NOT_INITIALIZED;
    }

    std::ifstream ifs(strFileName, msdk_fstream::in);
    if (!ifs.is_open()) {
        ResetState(READER_ERR_FILE_NOT_OPEN);
        return MFX_ERR_NOT_INITIALIZED;
    }

    FrameInfo frameInfo{};
    std::string line;
    std::getline(ifs, line);
    m_nFrames = std::stoi(line); // number of frames at first line

    m_FrameVals.reserve(m_nFrames);

    while (QPFile::get_line(ifs, line)) {
        frameInfo.displayOrder = QPFile::ReadDisplayOrder(line);
        frameInfo.QP           = QPFile::ReadQP(line);
        frameInfo.frameType    = QPFile::ReadFrameType(line);
        if (frameInfo.displayOrder > m_nFrames || frameInfo.QP > 51 ||
            frameInfo.frameType == MFX_FRAMETYPE_UNKNOWN) {
            ResetState(READER_ERR_INCORRECT_FILE);
            return MFX_ERR_NOT_INITIALIZED;
        }
        m_FrameVals.push_back(frameInfo);
    }
    if (m_FrameVals.size() < m_nFrames) {
        ResetState(READER_ERR_INCORRECT_FILE);
        return MFX_ERR_NOT_INITIALIZED;
    }

    return MFX_ERR_NONE;
}

std::string QPFile::Reader::GetErrorMessage() const {
    return ReaderStatusToString(m_ReaderSts);
}
mfxU32 QPFile::Reader::GetCurrentEncodedOrder() const {
    return m_CurFrameNum;
}
mfxU32 QPFile::Reader::GetCurrentDisplayOrder() const {
    return m_FrameVals.at(m_CurFrameNum).displayOrder;
}
mfxU16 QPFile::Reader::GetCurrentQP() const {
    return m_FrameVals.at(m_CurFrameNum).QP;
}
mfxU16 QPFile::Reader::GetCurrentFrameType() const {
    return m_FrameVals.at(m_CurFrameNum).frameType;
}
mfxU32 QPFile::Reader::GetFramesNum() const {
    return m_nFrames;
}
void QPFile::Reader::NextFrame() {
    ++m_CurFrameNum;
}

void TCBRCTestFile::Reader::ResetState(ReaderStatus set_sts) {
    m_CurFrameNum = std::numeric_limits<mfxU32>::max();
    m_ReaderSts   = set_sts;
    m_FrameVals.clear();
}

mfxStatus TCBRCTestFile::Reader::Read(const msdk_string& strFileName, mfxU32 codecid) {
    m_ReaderSts   = READER_ERR_NONE;
    m_CurFrameNum = 0;

    if (codecid != MFX_CODEC_AVC && codecid != MFX_CODEC_HEVC) {
        ResetState(READER_ERR_CODEC_UNSUPPORTED);
        return MFX_ERR_NOT_INITIALIZED;
    }

    std::ifstream ifs(strFileName, msdk_fstream::in);
    if (!ifs.is_open()) {
        ResetState(READER_ERR_FILE_NOT_OPEN);
        return MFX_ERR_NOT_INITIALIZED;
    }

    FrameInfo frameInfo{};
    std::string line;

    mfxU32 n = 0;
    while (TCBRCTestFile::get_line(ifs, line)) {
        frameInfo.displayOrder    = TCBRCTestFile::ReadDisplayOrder(line);
        frameInfo.targetFrameSize = TCBRCTestFile::ReadTargetFrameSize(line);
        if (frameInfo.displayOrder == 0)
            frameInfo.displayOrder = n;
        m_FrameVals.push_back(frameInfo);
        n++;
    }
    return MFX_ERR_NONE;
}

std::string TCBRCTestFile::Reader::GetErrorMessage() const {
    return ReaderStatusToString(m_ReaderSts);
}

mfxU32 TCBRCTestFile::Reader::GetTargetFrameSize(mfxU32 displayOrder) const {
    mfxU32 num = (mfxU32)m_FrameVals.size();
    if (num == 0)
        return 0;
    for (mfxU32 i = 0; i < num - 1; i++) {
        if (m_FrameVals.at(i + 1).displayOrder > displayOrder)
            return m_FrameVals.at(i).targetFrameSize;
    }
    return m_FrameVals.at(num - 1).targetFrameSize;
}

mfxStatus ConvertFrameRate(mfxF64 dFrameRate, mfxU32* pnFrameRateExtN, mfxU32* pnFrameRateExtD) {
    MSDK_CHECK_POINTER(pnFrameRateExtN, MFX_ERR_NULL_PTR);
    MSDK_CHECK_POINTER(pnFrameRateExtD, MFX_ERR_NULL_PTR);

    mfxU32 fr;

    fr = (mfxU32)(dFrameRate + .5);

    if (fabs(fr - dFrameRate) < 0.0001) {
        *pnFrameRateExtN = fr;
        *pnFrameRateExtD = 1;
        return MFX_ERR_NONE;
    }

    fr = (mfxU32)(dFrameRate * 1.001 + .5);

    if (fabs(fr * 1000 - dFrameRate * 1001) < 10) {
        *pnFrameRateExtN = fr * 1000;
        *pnFrameRateExtD = 1001;
        return MFX_ERR_NONE;
    }

    *pnFrameRateExtN = (mfxU32)(dFrameRate * 10000 + .5);
    *pnFrameRateExtD = 10000;

    return MFX_ERR_NONE;
}

mfxF64 CalculateFrameRate(mfxU32 nFrameRateExtN, mfxU32 nFrameRateExtD) {
    if (nFrameRateExtN && nFrameRateExtD)
        return (mfxF64)nFrameRateExtN / nFrameRateExtD;
    else
        return 0;
}

void FreeSurfacePool(mfxFrameSurface1* pSurfacesPool, mfxU16 nPoolSize) {
    if (pSurfacesPool) {
        for (mfxU16 i = 0; i < nPoolSize; i++) {
            pSurfacesPool[i].Data.Locked = 0;
        }
    }
}

mfxU16 GetFreeSurface(mfxFrameSurface1* pSurfacesPool, mfxU16 nPoolSize) {
    mfxU32 SleepInterval = 10; // milliseconds

    mfxU16 idx = MSDK_INVALID_SURF_IDX;

    CTimer t;
    t.Start();
    //wait if there's no free surface
    do {
        idx = GetFreeSurfaceIndex(pSurfacesPool, nPoolSize);

        if (MSDK_INVALID_SURF_IDX != idx) {
            break;
        }
        else {
            MSDK_SLEEP(SleepInterval);
        }
    } while (t.GetTime() < MSDK_SURFACE_WAIT_INTERVAL / 1000);

    if (idx == MSDK_INVALID_SURF_IDX) {
        msdk_printf(MSDK_STRING("ERROR: No free surfaces in pool (during long period)\n"));
    }

    return idx;
}

std::basic_string<msdk_char> CodecIdToStr(mfxU32 nFourCC) {
    std::basic_string<msdk_char> fcc;
    for (size_t i = 0; i < 4; i++) {
        fcc.push_back((msdk_char) * (i + (char*)&nFourCC));
    }
    return fcc;
}

PartiallyLinearFNC::PartiallyLinearFNC() : m_pX(), m_pY(), m_nPoints(), m_nAllocated() {}

PartiallyLinearFNC::~PartiallyLinearFNC() {
    delete[] m_pX;
    m_pX = NULL;
    delete[] m_pY;
    m_pY = NULL;
}

void PartiallyLinearFNC::AddPair(mfxF64 x, mfxF64 y) {
    //duplicates searching
    for (mfxU32 i = 0; i < m_nPoints; i++) {
        if (m_pX[i] == x)
            return;
    }
    if (m_nPoints == m_nAllocated) {
        m_nAllocated += 20;
        mfxF64* pnew;
        pnew = new mfxF64[m_nAllocated];
        //memcpy_s(pnew, sizeof(mfxF64)*m_nAllocated, m_pX, sizeof(mfxF64) * m_nPoints);
        MSDK_MEMCPY_BUF(pnew, 0, sizeof(mfxF64) * m_nAllocated, m_pX, sizeof(mfxF64) * m_nPoints);
        delete[] m_pX;
        m_pX = pnew;

        pnew = new mfxF64[m_nAllocated];
        //memcpy_s(pnew, sizeof(mfxF64)*m_nAllocated, m_pY, sizeof(mfxF64) * m_nPoints);
        MSDK_MEMCPY_BUF(pnew, 0, sizeof(mfxF64) * m_nAllocated, m_pY, sizeof(mfxF64) * m_nPoints);
        delete[] m_pY;
        m_pY = pnew;
    }
    m_pX[m_nPoints] = x;
    m_pY[m_nPoints] = y;

    m_nPoints++;
}

mfxF64 PartiallyLinearFNC::at(mfxF64 x) {
    if (m_nPoints < 2) {
        return 0;
    }
    bool bwasmin = false;
    bool bwasmax = false;

    mfxU32 maxx = 0;
    mfxU32 minx = 0;
    mfxU32 i;

    for (i = 0; i < m_nPoints; i++) {
        if (m_pX[i] <= x && (!bwasmin || m_pX[i] > m_pX[maxx])) {
            maxx    = i;
            bwasmin = true;
        }
        if (m_pX[i] > x && (!bwasmax || m_pX[i] < m_pX[minx])) {
            minx    = i;
            bwasmax = true;
        }
    }

    //point on the left
    if (!bwasmin) {
        for (i = 0; i < m_nPoints; i++) {
            if (m_pX[i] > m_pX[minx] && (!bwasmin || m_pX[i] < m_pX[minx])) {
                maxx    = i;
                bwasmin = true;
            }
        }
    }
    //point on the right
    if (!bwasmax) {
        for (i = 0; i < m_nPoints; i++) {
            if (m_pX[i] < m_pX[maxx] && (!bwasmax || m_pX[i] > m_pX[minx])) {
                minx    = i;
                bwasmax = true;
            }
        }
    }

    //linear interpolation
    return (x - m_pX[minx]) * (m_pY[maxx] - m_pY[minx]) / (m_pX[maxx] - m_pX[minx]) + m_pY[minx];
}

mfxU16 CalculateDefaultBitrate(mfxU32 nCodecId,
                               mfxU32 nTargetUsage,
                               mfxU32 nWidth,
                               mfxU32 nHeight,
                               mfxF64 dFrameRate) {
    PartiallyLinearFNC fnc;
    mfxF64 bitrate = 0;

    switch (nCodecId) {
        case MFX_CODEC_HEVC: {
            fnc.AddPair(0, 0);
            fnc.AddPair(25344, 225 / 1.3);
            fnc.AddPair(101376, 1000 / 1.3);
            fnc.AddPair(414720, 4000 / 1.3);
            fnc.AddPair(2058240, 5000 / 1.3);
            break;
        }
        case MFX_CODEC_AVC: {
            fnc.AddPair(0, 0);
            fnc.AddPair(25344, 225);
            fnc.AddPair(101376, 1000);
            fnc.AddPair(414720, 4000);
            fnc.AddPair(2058240, 5000);
            break;
        }
        case MFX_CODEC_MPEG2: {
            fnc.AddPair(0, 0);
            fnc.AddPair(414720, 12000);
            break;
        }
        default: {
            fnc.AddPair(0, 0);
            fnc.AddPair(414720, 12000);
            break;
        }
    }

    mfxF64 at = nWidth * nHeight * dFrameRate / 30.0;

    if (!at)
        return 0;

    switch (nTargetUsage) {
        case MFX_TARGETUSAGE_BEST_QUALITY: {
            bitrate = (&fnc)->at(at);
            break;
        }
        case MFX_TARGETUSAGE_BEST_SPEED: {
            bitrate = (&fnc)->at(at) * 0.5;
            break;
        }
        case MFX_TARGETUSAGE_BALANCED:
        default: {
            bitrate = (&fnc)->at(at) * 0.75;
            break;
        }
    }

    return (mfxU16)bitrate;
}

mfxU16 StrToTargetUsage(msdk_string strInput) {
    std::map<msdk_string, mfxU16> tu;
    tu[MSDK_STRING("quality")]  = (mfxU16)MFX_TARGETUSAGE_1;
    tu[MSDK_STRING("veryslow")] = (mfxU16)MFX_TARGETUSAGE_1;
    tu[MSDK_STRING("slower")]   = (mfxU16)MFX_TARGETUSAGE_2;
    tu[MSDK_STRING("slow")]     = (mfxU16)MFX_TARGETUSAGE_3;
    tu[MSDK_STRING("medium")]   = (mfxU16)MFX_TARGETUSAGE_4;
    tu[MSDK_STRING("balanced")] = (mfxU16)MFX_TARGETUSAGE_4;
    tu[MSDK_STRING("fast")]     = (mfxU16)MFX_TARGETUSAGE_5;
    tu[MSDK_STRING("faster")]   = (mfxU16)MFX_TARGETUSAGE_6;
    tu[MSDK_STRING("veryfast")] = (mfxU16)MFX_TARGETUSAGE_7;
    tu[MSDK_STRING("speed")]    = (mfxU16)MFX_TARGETUSAGE_7;
    tu[MSDK_STRING("1")]        = (mfxU16)MFX_TARGETUSAGE_1;
    tu[MSDK_STRING("2")]        = (mfxU16)MFX_TARGETUSAGE_2;
    tu[MSDK_STRING("3")]        = (mfxU16)MFX_TARGETUSAGE_3;
    tu[MSDK_STRING("4")]        = (mfxU16)MFX_TARGETUSAGE_4;
    tu[MSDK_STRING("5")]        = (mfxU16)MFX_TARGETUSAGE_5;
    tu[MSDK_STRING("6")]        = (mfxU16)MFX_TARGETUSAGE_6;
    tu[MSDK_STRING("7")]        = (mfxU16)MFX_TARGETUSAGE_7;

    if (tu.find(strInput) == tu.end())
        return 0;
    else
        return tu[strInput];
}

const msdk_char* TargetUsageToStr(mfxU16 tu) {
    switch (tu) {
        case MFX_TARGETUSAGE_BALANCED:
            return MSDK_STRING("balanced");
        case MFX_TARGETUSAGE_BEST_QUALITY:
            return MSDK_STRING("quality");
        case MFX_TARGETUSAGE_BEST_SPEED:
            return MSDK_STRING("speed");
        case MFX_TARGETUSAGE_UNKNOWN:
            return MSDK_STRING("unknown");
        default:
            return MSDK_STRING("unsupported");
    }
}

const msdk_char* ColorFormatToStr(mfxU32 format) {
    switch (format) {
        case MFX_FOURCC_NV12:
            return MSDK_STRING("NV12");
        case MFX_FOURCC_YV12:
            return MSDK_STRING("YV12");
        case MFX_FOURCC_I420:
            return MSDK_STRING("YUV420");
        case MFX_FOURCC_I422:
            return MSDK_STRING("I422");
        case MFX_FOURCC_RGB4:
            return MSDK_STRING("RGB4");
        case MFX_FOURCC_YUY2:
            return MSDK_STRING("YUY2");
        case MFX_FOURCC_UYVY:
            return MSDK_STRING("UYVY");
        case MFX_FOURCC_I210:
            return MSDK_STRING("I210");
        case MFX_FOURCC_P010:
            return MSDK_STRING("P010");
        case MFX_FOURCC_P210:
            return MSDK_STRING("P210");
        case MFX_FOURCC_Y210:
            return MSDK_STRING("Y210");
        case MFX_FOURCC_Y410:
            return MSDK_STRING("Y410");
        case MFX_FOURCC_P016:
            return MSDK_STRING("P016");
        case MFX_FOURCC_Y216:
            return MSDK_STRING("Y216");
        default:
            return MSDK_STRING("unsupported");
    }
}

mfxU32 GCD(mfxU32 a, mfxU32 b) {
    if (0 == a)
        return b;
    else if (0 == b)
        return a;

    mfxU32 a1, b1;

    if (a >= b) {
        a1 = a;
        b1 = b;
    }
    else {
        a1 = b;
        b1 = a;
    }

    // a1 >= b1;
    mfxU32 r = a1 % b1;

    while (0 != r) {
        a1 = b1;
        b1 = r;
        r  = a1 % b1;
    }

    return b1;
}

std::basic_string<msdk_char> FormMVCFileName(const msdk_char* strFileNamePattern,
                                             const mfxU32 numView) {
    if (NULL == strFileNamePattern)
        return MSDK_STRING("");

    std::basic_string<msdk_char> mvcFileName, fileExt;
    msdk_char fileName[MSDK_MAX_FILENAME_LEN];
#if defined(_WIN32) || defined(_WIN64)
    msdk_sprintf(fileName,
                 MSDK_MAX_FILENAME_LEN,
                 MSDK_STRING("%s_%d.yuv"),
                 strFileNamePattern,
                 numView);
#else
    msdk_sprintf(fileName, MSDK_STRING("%s_%d.yuv"), strFileNamePattern, numView);
#endif
    mvcFileName = fileName;

    return std::basic_string<msdk_char>(mvcFileName);
}

// function for getting a pointer to a specific external buffer from the array
mfxExtBuffer* GetExtBuffer(mfxExtBuffer** ebuffers, mfxU32 nbuffers, mfxU32 BufferId) {
    if (!ebuffers)
        return 0;
    for (mfxU32 i = 0; i < nbuffers; i++) {
        if (!ebuffers[i])
            continue;
        if (ebuffers[i]->BufferId == BufferId) {
            return ebuffers[i];
        }
    }
    return 0;
}

mfxStatus MJPEG_AVI_ParsePicStruct(mfxBitstream* bitstream) {
    // check input for consistency
    MSDK_CHECK_POINTER(bitstream->Data, MFX_ERR_MORE_DATA);
    if (bitstream->DataLength <= 0)
        return MFX_ERR_MORE_DATA;

    // define JPEG markers
    const mfxU8 APP0_marker[] = { 0xFF, 0xE0 };
    const mfxU8 SOI_marker[]  = { 0xFF, 0xD8 };
    const mfxU8 AVI1[]        = { 'A', 'V', 'I', '1' };

    // size of length field in header
    const mfxU8 len_size = 2;
    // size of picstruct field in header
    const mfxU8 picstruct_size = 1;

    mfxU32 length    = bitstream->DataLength;
    const mfxU8* ptr = reinterpret_cast<const mfxU8*>(bitstream->Data);

    //search for SOI marker
    while ((length >= sizeof(SOI_marker)) && memcmp(ptr, SOI_marker, sizeof(SOI_marker))) {
        skip(ptr, length, (mfxU32)1);
    }

    // skip SOI
    if (!skip(ptr, length, (mfxU32)sizeof(SOI_marker)) || length < sizeof(APP0_marker))
        return MFX_ERR_MORE_DATA;

    // if there is no APP0 marker return
    if (memcmp(ptr, APP0_marker, sizeof(APP0_marker))) {
        bitstream->PicStruct = MFX_PICSTRUCT_UNKNOWN;
        return MFX_ERR_NONE;
    }

    // skip APP0 & length value
    if (!skip(ptr, length, (mfxU32)sizeof(APP0_marker) + len_size) || length < sizeof(AVI1))
        return MFX_ERR_MORE_DATA;

    if (memcmp(ptr, AVI1, sizeof(AVI1))) {
        bitstream->PicStruct = MFX_PICSTRUCT_UNKNOWN;
        return MFX_ERR_NONE;
    }

    // skip 'AVI1'
    if (!skip(ptr, length, (mfxU32)sizeof(AVI1)) || length < picstruct_size)
        return MFX_ERR_MORE_DATA;

    // get PicStruct
    switch (*ptr) {
        case 0:
            bitstream->PicStruct = MFX_PICSTRUCT_PROGRESSIVE;
            break;
        case 1:
            bitstream->PicStruct = MFX_PICSTRUCT_FIELD_TFF;
            break;
        case 2:
            bitstream->PicStruct = MFX_PICSTRUCT_FIELD_BFF;
            break;
        default:
            bitstream->PicStruct = MFX_PICSTRUCT_UNKNOWN;
    }

    return MFX_ERR_NONE;
}

mfxVersion getMinimalRequiredVersion(const APIChangeFeatures& features) {
    mfxVersion version = { { 1, 1 } };

    if (features.MVCDecode || features.MVCEncode || features.LowLatency || features.JpegDecode) {
        version.Minor = 3;
    }

    if (features.ViewOutput) {
        version.Minor = 4;
    }

    if (features.JpegEncode || features.IntraRefresh) {
        version.Minor = 6;
    }

    if (features.LookAheadBRC) {
        version.Minor = 7;
    }

    if (features.AudioDecode) {
        version.Minor = 8;
    }

    if (features.SupportCodecPluginAPI) {
        version.Minor = 8;
    }

    return version;
}

bool CheckVersion(mfxVersion* version, msdkAPIFeature feature) {
    if (!version) {
        return false;
    }

    mfxU32 ver = MakeVersion(version->Major, version->Minor);

    switch (feature) {
        case MSDK_FEATURE_NONE:
            return true;
        case MSDK_FEATURE_MVC:
            if (ver >= 1003) {
                return true;
            }
            break;
        case MSDK_FEATURE_JPEG_DECODE:
            if (ver >= 1003) {
                return true;
            }
            break;
        case MSDK_FEATURE_LOW_LATENCY:
            if (ver >= 1003) {
                return true;
            }
            break;
        case MSDK_FEATURE_MVC_VIEWOUTPUT:
            if (ver >= 1004) {
                return true;
            }
            break;
        case MSDK_FEATURE_JPEG_ENCODE:
            if (ver >= 1006) {
                return true;
            }
            break;
        case MSDK_FEATURE_LOOK_AHEAD:
            if (ver >= 1007) {
                return true;
            }
            break;
        case MSDK_FEATURE_PLUGIN_API:
            if (ver >= 1008) {
                return true;
            }
            break;
        default:
            return false;
    }
    return false;
}

void ConfigureAspectRatioConversion(mfxInfoVPP* pVppInfo) {
    if (!pVppInfo)
        return;

    if (pVppInfo->In.AspectRatioW && pVppInfo->In.AspectRatioH && pVppInfo->In.CropW &&
        pVppInfo->In.CropH && pVppInfo->Out.AspectRatioW && pVppInfo->Out.AspectRatioH &&
        pVppInfo->Out.CropW && pVppInfo->Out.CropH) {
        mfxF64 dFrameAR = ((mfxF64)pVppInfo->In.AspectRatioW * pVppInfo->In.CropW) /
                          (mfxF64)pVppInfo->In.AspectRatioH / (mfxF64)pVppInfo->In.CropH;

        mfxF64 dPixelAR = pVppInfo->Out.AspectRatioW / (mfxF64)pVppInfo->Out.AspectRatioH;

        mfxU16 dProportionalH = (mfxU16)(pVppInfo->Out.CropW * dPixelAR / dFrameAR + 1) &
                                -2; //round to closest odd (values are always positive)

        if (dProportionalH < pVppInfo->Out.CropH) {
            pVppInfo->Out.CropY = (mfxU16)((pVppInfo->Out.CropH - dProportionalH) / 2. + 1) & -2;
            pVppInfo->Out.CropH = pVppInfo->Out.CropH - 2 * pVppInfo->Out.CropY;
        }
        else if (dProportionalH > pVppInfo->Out.CropH) {
            mfxU16 dProportionalW = (mfxU16)(pVppInfo->Out.CropH * dFrameAR / dPixelAR + 1) & -2;

            pVppInfo->Out.CropX = (mfxU16)((pVppInfo->Out.CropW - dProportionalW) / 2 + 1) & -2;
            pVppInfo->Out.CropW = pVppInfo->Out.CropW - 2 * pVppInfo->Out.CropX;
        }
    }
}

void SEICalcSizeType(std::vector<mfxU8>& data, mfxU16 type, mfxU32 size) {
    mfxU32 B = type;

    while (B > 255) {
        data.push_back(255);
        B -= 255;
    }
    data.push_back(mfxU8(B));

    B = size;

    while (B > 255) {
        data.push_back(255);
        B -= 255;
    }
    data.push_back(mfxU8(B));
}

mfxU8 Char2Hex(msdk_char ch) {
    msdk_char value = ch;
    if (value >= MSDK_CHAR('0') && value <= MSDK_CHAR('9')) {
        value -= MSDK_CHAR('0');
    }
    else if (value >= MSDK_CHAR('a') && value <= MSDK_CHAR('f')) {
        value = value - MSDK_CHAR('a') + 10;
    }
    else if (value >= MSDK_CHAR('A') && value <= MSDK_CHAR('F')) {
        value = value - MSDK_CHAR('A') + 10;
    }
    else {
        value = 0;
    }
    return (mfxU8)value;
}

namespace {
int g_trace_level = MSDK_TRACE_LEVEL_INFO;
}

int msdk_trace_get_level() {
    return g_trace_level;
}

void msdk_trace_set_level(int newLevel) {
    g_trace_level = newLevel;
}

bool msdk_trace_is_printable(int level) {
    return g_trace_level >= level;
}

msdk_ostream& operator<<(msdk_ostream& os, MsdkTraceLevel tl) {
    switch (tl) {
        case MSDK_TRACE_LEVEL_CRITICAL:
            os << MSDK_STRING("CRITICAL");
            break;
        case MSDK_TRACE_LEVEL_ERROR:
            os << MSDK_STRING("ERROR");
            break;
        case MSDK_TRACE_LEVEL_WARNING:
            os << MSDK_STRING("WARNING");
            break;
        case MSDK_TRACE_LEVEL_INFO:
            os << MSDK_STRING("INFO");
            break;
        case MSDK_TRACE_LEVEL_DEBUG:
            os << MSDK_STRING("DEBUG");
            break;
        default:
            break;
    }
    return os;
}

msdk_string NoFullPath(const msdk_string& file_path) {
    size_t pos = file_path.find_last_of(MSDK_STRING("\\/"));
    if (pos != msdk_string::npos) {
        return file_path.substr(pos + 1);
    }
    return file_path;
}

template <>
mfxStatus msdk_opt_read(const msdk_char* string, mfxU8& value) {
    msdk_char* stopCharacter;
    value = (mfxU8)msdk_strtol(string, &stopCharacter, 10);

    return (msdk_strlen(stopCharacter) == 0) ? MFX_ERR_NONE : MFX_ERR_UNKNOWN;
}

template <>
mfxStatus msdk_opt_read(const msdk_char* string, mfxU16& value) {
    msdk_char* stopCharacter;
    value = (mfxU16)msdk_strtol(string, &stopCharacter, 10);

    return (msdk_strlen(stopCharacter) == 0) ? MFX_ERR_NONE : MFX_ERR_UNKNOWN;
}

template <>
mfxStatus msdk_opt_read(const msdk_char* string, mfxU32& value) {
    msdk_char* stopCharacter;
    value = (mfxU32)msdk_strtol(string, &stopCharacter, 10);

    return (msdk_strlen(stopCharacter) == 0) ? MFX_ERR_NONE : MFX_ERR_UNKNOWN;
}

template <>
mfxStatus msdk_opt_read(const msdk_char* string, mfxF32& value) {
    msdk_char* stopCharacter;
    value = (mfxF32)msdk_strtod(string, &stopCharacter);
    return (msdk_strlen(stopCharacter) == 0) ? MFX_ERR_NONE : MFX_ERR_UNKNOWN;
}
template <>
mfxStatus msdk_opt_read(const msdk_char* string, mfxF64& value) {
    msdk_char* stopCharacter;
    value = (mfxF64)msdk_strtod(string, &stopCharacter);

    return (msdk_strlen(stopCharacter) == 0) ? MFX_ERR_NONE : MFX_ERR_UNKNOWN;
}

mfxStatus msdk_opt_read(const msdk_char* string, mfxU8& value);
mfxStatus msdk_opt_read(const msdk_char* string, mfxU16& value);
mfxStatus msdk_opt_read(const msdk_char* string, mfxU32& value);
mfxStatus msdk_opt_read(const msdk_char* string, mfxF64& value);
mfxStatus msdk_opt_read(const msdk_char* string, mfxF32& value);

template <>
mfxStatus msdk_opt_read(const msdk_char* string, mfxI16& value) {
    msdk_char* stopCharacter;
    value = (mfxI16)msdk_strtol(string, &stopCharacter, 10);

    return (msdk_strlen(stopCharacter) == 0) ? MFX_ERR_NONE : MFX_ERR_UNKNOWN;
}

template <>
mfxStatus msdk_opt_read(const msdk_char* string, mfxI32& value) {
    msdk_char* stopCharacter;
    value = (mfxI32)msdk_strtol(string, &stopCharacter, 10);

    return (msdk_strlen(stopCharacter) == 0) ? MFX_ERR_NONE : MFX_ERR_UNKNOWN;
}

mfxStatus msdk_opt_read(const msdk_char* string, mfxI16& value);
mfxStatus msdk_opt_read(const msdk_char* string, mfxI32& value);

template <>
mfxStatus msdk_opt_read(const msdk_char* string, mfxPriority& value) {
    mfxU32 priority = 0;
    mfxStatus sts   = msdk_opt_read<>(string, priority);

    if (MFX_ERR_NONE == sts)
        value = (mfxPriority)priority;
    return sts;
}

mfxStatus msdk_opt_read(msdk_char* string, mfxPriority& value);

bool IsDecodeCodecSupported(mfxU32 codecFormat) {
    switch (codecFormat) {
        case MFX_CODEC_MPEG2:
        case MFX_CODEC_AVC:
        case MFX_CODEC_HEVC:
        case MFX_CODEC_VC1:
        case CODEC_MVC:
        case MFX_CODEC_JPEG:
        case MFX_CODEC_VP8:
        case MFX_CODEC_VP9:
        case MFX_CODEC_AV1:
            break;
        default:
            return false;
    }
    return true;
}

bool IsEncodeCodecSupported(mfxU32 codecFormat) {
    switch (codecFormat) {
        case MFX_CODEC_AVC:
        case MFX_CODEC_HEVC:
        case MFX_CODEC_MPEG2:
        case CODEC_MVC:
        case MFX_CODEC_VP8:
        case MFX_CODEC_JPEG:
        case MFX_CODEC_VP9:
        case MFX_CODEC_AV1:
            break;
        default:
            return false;
    }
    return true;
}

bool IsPluginCodecSupported(mfxU32 codecFormat) {
    switch (codecFormat) {
        case MFX_CODEC_HEVC:
        case MFX_CODEC_AVC:
        case MFX_CODEC_MPEG2:
        case MFX_CODEC_VC1:
        case MFX_CODEC_VP8:
        case MFX_CODEC_VP9:
            break;
        default:
            return false;
    }
    return true;
}

mfxStatus StrFormatToCodecFormatFourCC(msdk_char* strInput, mfxU32& codecFormat) {
    mfxStatus sts = MFX_ERR_NONE;
    codecFormat   = 0;

    if (strInput == NULL)
        sts = MFX_ERR_NULL_PTR;

    if (sts == MFX_ERR_NONE) {
        if (0 == msdk_strcmp(strInput, MSDK_STRING("mpeg2"))) {
            codecFormat = MFX_CODEC_MPEG2;
        }
        else if (0 == msdk_strcmp(strInput, MSDK_STRING("h264"))) {
            codecFormat = MFX_CODEC_AVC;
        }
        else if (0 == msdk_strcmp(strInput, MSDK_STRING("h265"))) {
            codecFormat = MFX_CODEC_HEVC;
        }
        else if (0 == msdk_strcmp(strInput, MSDK_STRING("vc1"))) {
            codecFormat = MFX_CODEC_VC1;
        }
        else if (0 == msdk_strcmp(strInput, MSDK_STRING("mvc"))) {
            codecFormat = CODEC_MVC;
        }
        else if (0 == msdk_strcmp(strInput, MSDK_STRING("jpeg"))) {
            codecFormat = MFX_CODEC_JPEG;
        }
        else if (0 == msdk_strcmp(strInput, MSDK_STRING("vp8"))) {
            codecFormat = MFX_CODEC_VP8;
        }
        else if (0 == msdk_strcmp(strInput, MSDK_STRING("vp9"))) {
            codecFormat = MFX_CODEC_VP9;
        }
        else if (0 == msdk_strcmp(strInput, MSDK_STRING("av1"))) {
            codecFormat = MFX_CODEC_AV1;
        }
        else if ((0 == msdk_strcmp(strInput, MSDK_STRING("raw")))) {
            codecFormat = MFX_CODEC_DUMP;
        }
        else if ((0 == msdk_strcmp(strInput, MSDK_STRING("rgb4_frame")))) {
            codecFormat = MFX_CODEC_RGB4;
        }
        else if ((0 == msdk_strcmp(strInput, MSDK_STRING("nv12")))) {
            codecFormat = MFX_CODEC_NV12;
        }
        else if ((0 == msdk_strcmp(strInput, MSDK_STRING("i420")))) {
            codecFormat = MFX_CODEC_I420;
        }
        else if ((0 == msdk_strcmp(strInput, MSDK_STRING("i422")))) {
            codecFormat = MFX_CODEC_I422;
        }
        else if ((0 == msdk_strcmp(strInput, MSDK_STRING("p010")))) {
            codecFormat = MFX_CODEC_P010;
        }
        else
            sts = MFX_ERR_UNSUPPORTED;
    }

    return sts;
}

msdk_string StatusToString(mfxStatus sts) {
    switch (sts) {
        case MFX_ERR_NONE:
            return msdk_string(MSDK_STRING("MFX_ERR_NONE"));
        case MFX_ERR_UNKNOWN:
            return msdk_string(MSDK_STRING("MFX_ERR_UNKNOWN"));
        case MFX_ERR_NULL_PTR:
            return msdk_string(MSDK_STRING("MFX_ERR_NULL_PTR"));
        case MFX_ERR_UNSUPPORTED:
            return msdk_string(MSDK_STRING("MFX_ERR_UNSUPPORTED"));
        case MFX_ERR_MEMORY_ALLOC:
            return msdk_string(MSDK_STRING("MFX_ERR_MEMORY_ALLOC"));
        case MFX_ERR_NOT_ENOUGH_BUFFER:
            return msdk_string(MSDK_STRING("MFX_ERR_NOT_ENOUGH_BUFFER"));
        case MFX_ERR_INVALID_HANDLE:
            return msdk_string(MSDK_STRING("MFX_ERR_INVALID_HANDLE"));
        case MFX_ERR_LOCK_MEMORY:
            return msdk_string(MSDK_STRING("MFX_ERR_LOCK_MEMORY"));
        case MFX_ERR_NOT_INITIALIZED:
            return msdk_string(MSDK_STRING("MFX_ERR_NOT_INITIALIZED"));
        case MFX_ERR_NOT_FOUND:
            return msdk_string(MSDK_STRING("MFX_ERR_NOT_FOUND"));
        case MFX_ERR_MORE_DATA:
            return msdk_string(MSDK_STRING("MFX_ERR_MORE_DATA"));
        case MFX_ERR_MORE_SURFACE:
            return msdk_string(MSDK_STRING("MFX_ERR_MORE_SURFACE"));
        case MFX_ERR_ABORTED:
            return msdk_string(MSDK_STRING("MFX_ERR_ABORTED"));
        case MFX_ERR_DEVICE_LOST:
            return msdk_string(MSDK_STRING("MFX_ERR_DEVICE_LOST"));
        case MFX_ERR_INCOMPATIBLE_VIDEO_PARAM:
            return msdk_string(MSDK_STRING("MFX_ERR_INCOMPATIBLE_VIDEO_PARAM"));
        case MFX_ERR_INVALID_VIDEO_PARAM:
            return msdk_string(MSDK_STRING("MFX_ERR_INVALID_VIDEO_PARAM"));
        case MFX_ERR_UNDEFINED_BEHAVIOR:
            return msdk_string(MSDK_STRING("MFX_ERR_UNDEFINED_BEHAVIOR"));
        case MFX_ERR_DEVICE_FAILED:
            return msdk_string(MSDK_STRING("MFX_ERR_DEVICE_FAILED"));
        case MFX_ERR_MORE_BITSTREAM:
            return msdk_string(MSDK_STRING("MFX_ERR_MORE_BITSTREAM"));
        case MFX_ERR_GPU_HANG:
            return msdk_string(MSDK_STRING("MFX_ERR_GPU_HANG"));
        case MFX_ERR_REALLOC_SURFACE:
            return msdk_string(MSDK_STRING("MFX_ERR_REALLOC_SURFACE"));
        case MFX_WRN_IN_EXECUTION:
            return msdk_string(MSDK_STRING("MFX_WRN_IN_EXECUTION"));
        case MFX_WRN_DEVICE_BUSY:
            return msdk_string(MSDK_STRING("MFX_WRN_DEVICE_BUSY"));
        case MFX_WRN_VIDEO_PARAM_CHANGED:
            return msdk_string(MSDK_STRING("MFX_WRN_VIDEO_PARAM_CHANGED"));
        case MFX_WRN_PARTIAL_ACCELERATION:
            return msdk_string(MSDK_STRING("MFX_WRN_PARTIAL_ACCELERATION"));
        case MFX_WRN_INCOMPATIBLE_VIDEO_PARAM:
            return msdk_string(MSDK_STRING("MFX_WRN_INCOMPATIBLE_VIDEO_PARAM"));
        case MFX_WRN_VALUE_NOT_CHANGED:
            return msdk_string(MSDK_STRING("MFX_WRN_VALUE_NOT_CHANGED"));
        case MFX_WRN_OUT_OF_RANGE:
            return msdk_string(MSDK_STRING("MFX_WRN_OUT_OF_RANGE"));
        case MFX_WRN_FILTER_SKIPPED:
            return msdk_string(MSDK_STRING("MFX_WRN_FILTER_SKIPPED"));
        case MFX_TASK_WORKING:
            return msdk_string(MSDK_STRING("MFX_TASK_WORKING"));
        case MFX_TASK_BUSY:
            return msdk_string(MSDK_STRING("MFX_TASK_BUSY"));
        case MFX_ERR_MORE_DATA_SUBMIT_TASK:
            return msdk_string(MSDK_STRING("MFX_ERR_MORE_DATA_SUBMIT_TASK"));
        default:
            return msdk_string(MSDK_STRING("[Unknown status]"));
    }
}

mfxI32 getMonitorType(msdk_char* str) {
    struct {
        const msdk_char* str;
        mfxI32 mfx_type;
    } table[] = {
#define __DECLARE(type) { MSDK_STRING(#type), MFX_MONITOR_##type }
        __DECLARE(Unknown),
        __DECLARE(VGA),
        __DECLARE(DVII),
        __DECLARE(DVID),
        __DECLARE(DVIA),
        __DECLARE(Composite),
        __DECLARE(SVIDEO),
        __DECLARE(LVDS),
        __DECLARE(Component),
        __DECLARE(9PinDIN),
        __DECLARE(HDMIA),
        __DECLARE(HDMIB),
        __DECLARE(eDP),
        __DECLARE(TV),
        __DECLARE(DisplayPort),
#if defined(DRM_MODE_CONNECTOR_VIRTUAL) // from libdrm 2.4.59
        __DECLARE(VIRTUAL),
#endif
#if defined(DRM_MODE_CONNECTOR_DSI) // from libdrm 2.4.59
        __DECLARE(DSI)
#endif
#undef __DECLARE
    };
    for (unsigned int i = 0; i < sizeof(table) / sizeof(table[0]); ++i) {
        if (0 == msdk_strcmp(str, table[i].str)) {
            return table[i].mfx_type;
        }
    }
    return MFX_MONITOR_MAXNUMBER;
}

CH264FrameReader::CH264FrameReader()
        : CSmplBitstreamReader(),
          m_processedBS(0),
          m_originalBS(),
          m_isEndOfStream(false),
          m_pNALSplitter(),
          m_frame(0),
          m_plainBuffer(0),
          m_plainBufferSize(0),
          m_outBS() {}

CH264FrameReader::~CH264FrameReader() {}

void CH264FrameReader::Close() {
    CSmplBitstreamReader::Close();

    if (NULL != m_plainBuffer) {
        free(m_plainBuffer);
        m_plainBuffer     = NULL;
        m_plainBufferSize = 0;
    }
}

mfxStatus CH264FrameReader::Init(const msdk_char* strFileName) {
    mfxStatus sts = MFX_ERR_NONE;

    sts = CSmplBitstreamReader::Init(strFileName);
    if (sts != MFX_ERR_NONE)
        return sts;

    m_isEndOfStream = false;
    m_processedBS   = NULL;

    m_originalBS.Extend(1024 * 1024);

    m_pNALSplitter.reset(new ProtectedLibrary::AVC_Spl());

    m_frame           = 0;
    m_plainBuffer     = 0;
    m_plainBufferSize = 0;

    return sts;
}

mfxStatus CH264FrameReader::ReadNextFrame(mfxBitstream* pBS) {
    mfxStatus sts = MFX_ERR_NONE;
    pBS->DataFlag = MFX_BITSTREAM_COMPLETE_FRAME;
    //read bit stream from source
    while (!m_originalBS.DataLength) {
        sts = CSmplBitstreamReader::ReadNextFrame(&m_originalBS);
        if (sts != MFX_ERR_NONE && sts != MFX_ERR_MORE_DATA)
            return sts;
        if (sts == MFX_ERR_MORE_DATA) {
            m_isEndOfStream = true;
            break;
        }
    }

    do {
        sts = PrepareNextFrame(m_isEndOfStream ? NULL : &m_originalBS, &m_processedBS);

        if (sts == MFX_ERR_MORE_DATA) {
            if (m_isEndOfStream) {
                break;
            }

            sts = CSmplBitstreamReader::ReadNextFrame(&m_originalBS);
            if (sts == MFX_ERR_MORE_DATA)
                m_isEndOfStream = true;
            continue;
        }
        else if (MFX_ERR_NONE != sts)
            return sts;

    } while (MFX_ERR_NONE != sts);

    // get output stream
    if (NULL != m_processedBS) {
        mfxStatus copySts = CopyBitstream2(pBS, m_processedBS);
        if (copySts < MFX_ERR_NONE)
            return copySts;
        m_processedBS = NULL;
    }

    return sts;
}

mfxStatus CH264FrameReader::PrepareNextFrame(mfxBitstream* in, mfxBitstream** out) {
    mfxStatus sts = MFX_ERR_NONE;

    if (NULL == out)
        return MFX_ERR_NULL_PTR;

    *out = NULL;

    // get frame if it is not ready yet
    if (NULL == m_frame) {
        sts = m_pNALSplitter->GetFrame(in, &m_frame);
        if (sts != MFX_ERR_NONE)
            return sts;
    }

    if (m_plainBufferSize < m_frame->DataLength) {
        if (NULL != m_plainBuffer) {
            free(m_plainBuffer);
            m_plainBuffer     = NULL;
            m_plainBufferSize = 0;
        }
        m_plainBuffer = (mfxU8*)malloc(m_frame->DataLength);
        if (NULL == m_plainBuffer)
            return MFX_ERR_MEMORY_ALLOC;
        m_plainBufferSize = m_frame->DataLength;
    }

    MSDK_MEMCPY_BUF(m_plainBuffer, 0, m_plainBufferSize, m_frame->Data, m_frame->DataLength);
    m_outBS            = {};
    m_outBS.Data       = m_plainBuffer;
    m_outBS.DataOffset = 0;
    m_outBS.DataLength = m_frame->DataLength;
    m_outBS.MaxLength  = m_frame->DataLength;
    m_outBS.DataFlag   = MFX_BITSTREAM_COMPLETE_FRAME;
    m_outBS.TimeStamp  = m_frame->TimeStamp;

    m_pNALSplitter->ResetCurrentState();
    m_frame = NULL;

    *out = &m_outBS;

    return sts;
}

// 1 ms provides better result in range [0..5] ms
#define DEVICE_WAIT_TIME 1

// This function either performs synchronization using provided syncpoint, or just waits for predefined time if syncpoint is already 0 (this usually happens if syncpoint was already processed)
void WaitForDeviceToBecomeFree(MFXVideoSession& session,
                               mfxSyncPoint& syncPoint,
                               mfxStatus& currentStatus) {
    // Wait 1ms will be probably enough to device release
    if (syncPoint) {
        mfxStatus stsSync = session.SyncOperation(syncPoint, DEVICE_WAIT_TIME);
        if (MFX_ERR_NONE == stsSync) {
            // retire completed sync point (otherwise we may start active polling)
            syncPoint = NULL;
        }
        else if (stsSync < 0) {
            currentStatus = stsSync;
        }
    }
    else {
        MSDK_SLEEP(DEVICE_WAIT_TIME);
    }
}

mfxU16 FourCCToChroma(mfxU32 fourCC) {
    switch (fourCC) {
        case MFX_FOURCC_NV12:
        case MFX_FOURCC_P010:
        case MFX_FOURCC_P016:
            return MFX_CHROMAFORMAT_YUV420;
        case MFX_FOURCC_NV16:
        case MFX_FOURCC_I422:
        case MFX_FOURCC_I210:
        case MFX_FOURCC_P210:
        case MFX_FOURCC_Y210:
        case MFX_FOURCC_Y216:
        case MFX_FOURCC_YUY2:
            return MFX_CHROMAFORMAT_YUV422;
        case MFX_FOURCC_Y410:
        case MFX_FOURCC_A2RGB10:
        case MFX_FOURCC_AYUV:
        case MFX_FOURCC_RGB4:
            return MFX_CHROMAFORMAT_YUV444;
    }

    return MFX_CHROMAFORMAT_YUV420;
}

#if defined(_WIN32) || defined(_WIN64)

mfxStatus PrintLoadedModules() {
    DWORD currProcessID = GetCurrentProcessId();

    void* hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, currProcessID);
    if (NULL == hProcess) {
        return MFX_ERR_UNDEFINED_BEHAVIOR;
    }

    // get buffee size for array of loaded libs
    DWORD needed;
    if (!EnumProcessModules(hProcess, nullptr, 0, &needed)) {
        CloseHandle(hProcess);
        return MFX_ERR_UNDEFINED_BEHAVIOR;
    }

    // get a list of all the loaded modules in this process.
    std::vector<HMODULE> modules(needed / sizeof(HMODULE));
    if (!EnumProcessModulesEx(hProcess, modules.data(), needed, &needed, LIST_MODULES_ALL)) {
        CloseHandle(hProcess);
        return MFX_ERR_UNDEFINED_BEHAVIOR;
    }

    const DWORD MAX_FILE_PATH = 1024;
    for (auto module : modules) {
        TCHAR moduleName[MAX_PATH];
        if (GetModuleBaseName(hProcess, module, moduleName, MAX_PATH)) {
            if (_tcsstr(moduleName, _T(LIBMFXHW_MASK)) != NULL ||
                _tcsstr(moduleName, _T(LIBMFXSW_MASK)) != NULL ||
                _tcsstr(moduleName, _T(ONEVPL32)) != NULL ||
                _tcsstr(moduleName, _T(ONEVPL64)) != NULL ||
                _tcsstr(moduleName, _T(ONEVPLSW_MASK)) != NULL) {
                TCHAR modulePath[MAX_FILE_PATH];
                DWORD charsReturned = GetModuleFileName(module, modulePath, MAX_FILE_PATH);
                // path can be bigger than MAX_FILE_PATH, in this case it will be truncated
                // so, print whole or truncated part of path and, if we get truncated path, print module name too
                if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
                    msdk_printf(MSDK_STRING("Loaded module name: %s ; "), moduleName);
                }
                msdk_printf(MSDK_STRING("Loaded module path: %s \n"), modulePath);
            }
        }
    }
    CloseHandle(hProcess);
    return MFX_ERR_NONE;
}

#else // #if defined(_WIN32) || defined(_WIN64)

int PrintLibMFXPath(struct dl_phdr_info* info, size_t size, void* data) {
    std::string libPath = info->dlpi_name;
    if (libPath.find(LIBMFXSW_MASK) != std::string::npos ||
        libPath.find(LIBMFXHW_MASK) != std::string::npos ||
        libPath.find(ONEVPLSW_MASK) != std::string::npos ||
        libPath.find(ONEVPL_MASK) != std::string::npos) {
        if (data) {
            msdk_printf(MSDK_STRING("   %d: %s \n"), *((int*)data), info->dlpi_name);
            *(int*)data += 1;
        }
        else {
            msdk_printf(MSDK_STRING("Loaded module: %s \n"), info->dlpi_name);
        }
    }
    return 0;
}

#endif // #if defined(_WIN32) || defined(_WIN64)
