umc_h264_npf.cpp

这是在PCA下的基于IPP库示例代码例子,在网上下了IPP的库之后,设置相关参数就可以编译该代码.

//
//               INTEL CORPORATION PROPRIETARY INFORMATION
//  This software is supplied under the terms of a license agreement or
//  nondisclosure agreement with Intel Corporation and may not be copied
//  or disclosed except in accordance with the terms of that agreement.
//        Copyright (c) 2004 - 2005 Intel Corporation. All Rights Reserved.
//

// This file implements the core noise reduction filter class,
// CNoiseReductionFilter.  It contains the constructor, destructor, and
// mainly all the custom interfaces exposed.  Other methods that involve
// the actual spatio-temporal filtering operations are contained in the
// files npf_c.cpp and npf_mmx.cpp.

#include <memory.h>
#include <stdlib.h>

#include "umc_h264_npf.h"
#include "umc_h264_pub.h"

// following timing code are for development purposes

//----------------------------------------------------------------------------
// Constructor
namespace UMC
{

CNoiseReductionFilter::CNoiseReductionFilter(
    const bool , // bIsMMX,
    const bool , // bIsKNI,
    const bool bIs7BitPel)
{
    m_bFirstFrame       = true;
    m_bFirstFrame_MF    = true;
    m_b7BitPel          = bIs7BitPel;
    m_pLocalBuffer      = NULL;
    m_pLastFrame        = NULL;
    m_pLastFrameY       = NULL;
    m_pLastFrameU       = NULL;
    m_pLastFrameV       = NULL;
    m_uLocalBufferSize  = 0;
    m_pTFtapsBuffer     = NULL;
    m_pTFtaps           = NULL;
    m_uBadEdge_Top      = 2;
    m_uBadEdge_Left     = 2;
    m_uBadEdge_Bottom   = 2;
    m_uMode             = GetDefaultNoiseReductionMode();
    m_bEnabled          = IsNoiseReductionEnabledByDefault();

    // Allocate buffer for temporal filter taps
    if ((m_pTFtapsBuffer = new Ipp8s[512 + 8]) != NULL)
        m_pTFtaps = (Ipp8s*) H264_ALIGN(m_pTFtapsBuffer, 8);

    // Set the filter options to their default values
    GetDefaultNoiseReductionOptions(m_options);
    UpdateAndScaleThresholds();

    // No MMX optimization
    m_bIsMMX = false;

#if defined(GET_NPF_TIMING)
    timing_sum = timing_cnt = timing_pels = 0;
#endif

} // (Constructor)


//----------------------------------------------------------------------------
// Destructor

CNoiseReductionFilter::~CNoiseReductionFilter()
{
    if (m_pLocalBuffer)
    {
        delete [] m_pLocalBuffer;
        m_pLocalBuffer = NULL;
        m_pLastFrame = NULL;
        m_pLastFrameY = NULL;
        m_pLastFrameU = NULL;
        m_pLastFrameV = NULL;
    }
    delete [] m_pTFtapsBuffer;

#if defined(GET_NPF_TIMING)
    Ipp32u timing_avg = timing_cnt ? (timing_sum / timing_cnt) : 0;
    printf("\nNoise Prefilter Avg = %d per frm, %d per pel\n",
        timing_avg, timing_pels ? (timing_avg / timing_pels) : 0);
#endif

} // (Destructor)


//----------------------------------------------------------------------------
bool CNoiseReductionFilter::Start_Sequence(
    const Ipp32u width,
    const Ipp32u height)
{
    // Forget about any past memory
    m_bFirstFrame       = true;
    m_bFirstFrame_MF    = true;
    m_uBadEdge_Top      = 2;
    m_uBadEdge_Left     = 2;
    m_uBadEdge_Bottom   = 2;

    // Width and height must be 4x and >= 8
    if ((width & 3) || (height & 3) || (width < 8) || (height < 8))
    {
        return false;
    }

    // Pitch not known at this point
    // Local buffer to be allocated later in DoFiltering
    return true;

} // Start_Sequence


//----------------------------------------------------------------------------
// Enable or disable filter

bool CNoiseReductionFilter::EnableNoiseReduction(const bool enable)
{
    // If being turned off, reset our state for the next time we are enabled
    if (!enable)
    {
        m_bFirstFrame = true;
        m_bFirstFrame_MF = true;
    }

    m_bEnabled = enable;

    return true;

} // EnableNoiseReduction


//----------------------------------------------------------------------------
bool CNoiseReductionFilter::IsNoiseReductionEnabled()
{
    return m_bEnabled;
}


//----------------------------------------------------------------------------
const bool IS_NOISEPF_ENABLED_BY_DEFAULT = false;

bool CNoiseReductionFilter::IsNoiseReductionEnabledByDefault()
{
    return IS_NOISEPF_ENABLED_BY_DEFAULT;
}


//----------------------------------------------------------------------------
bool CNoiseReductionFilter::PutNoiseReductionMode(const Ipp32u mode)
{
    if (!mode || (mode & ~(H264_Noise_Reduction_INR_Mode |
                           H264_Noise_Reduction_NER_Mode |
                           H264_Noise_Reduction_TNR_Mode)))
    {
        return false;
    }

    if (!(m_uMode & H264_Noise_Reduction_INR_Mode) &&
            (mode & H264_Noise_Reduction_INR_Mode))
        m_bFirstFrame_MF = true;

    if (!(m_uMode & H264_Noise_Reduction_TNR_Mode) &&
            (mode & H264_Noise_Reduction_TNR_Mode) && m_bFirstFrame_MF)
        m_bFirstFrame = true;

    m_uMode = mode;
    return true;
}


//----------------------------------------------------------------------------
Ipp32u CNoiseReductionFilter::GetNoiseReductionMode()
{
    return m_uMode;
}


//----------------------------------------------------------------------------
const Ipp32u DEFAULT_NOISEPF_MODE =
    (H264_Noise_Reduction_INR_Mode | H264_Noise_Reduction_NER_Mode);

Ipp32u CNoiseReductionFilter::GetDefaultNoiseReductionMode()
{
    return DEFAULT_NOISEPF_MODE;
}


//----------------------------------------------------------------------------
// Get default filter options and store in opt

void CNoiseReductionFilter::GetDefaultNoiseReductionOptions(
    H264_Noise_Reduction_Options& opt)
{
    opt.y           = true;
    opt.u           = true;
    opt.v           = true;
    opt.tf_thres1   = 6;
    opt.tf_thres2   = 12;
    opt.tf_thres3   = 20;
    opt.mf_simple   = true;
    opt.mf_thres_s  = 15;
    opt.mf_thres_t  = 6;

} // GetDefaultNoiseReductionOptions


//----------------------------------------------------------------------------
// Update data used by the MMX / intrinsic routine with the current filter
// options in m_options
// Note: opt.mf_simple is not used, always apply simplified sort

void CNoiseReductionFilter::UpdateAndScaleThresholds()
{
    if (m_b7BitPel)
    {
        m_tf_thres1     = m_options.tf_thres1 >> 1;
        m_tf_thres2     = m_options.tf_thres2 >> 1;
        m_tf_thres3     = m_options.tf_thres3 >> 1;
        m_mf_thres_s    = m_options.mf_thres_s >> 1;
        m_mf_thres_t    = m_options.mf_thres_t >> 1;
    }
    else
    {
        m_tf_thres1     = m_options.tf_thres1;
        m_tf_thres2     = m_options.tf_thres2;
        m_tf_thres3     = m_options.tf_thres3;
        m_mf_thres_s    = m_options.mf_thres_s;
        m_mf_thres_t    = m_options.mf_thres_t;
    }

    // Initialize temporal filter taps
    if (m_pTFtapsBuffer != NULL)
    {
        for (Ipp32s i = 0; i < 512; i ++)
        {
            Ipp32s j = i - 255;
            Ipp32u d = labs(j);

            // note: All thresholds are < H264_Noise_Reduction_Max_Thres_TF.
            //       This ensures the difference to fit within 8 bits.
            if (d < m_tf_thres1)
                m_pTFtaps[i] = Ipp8s(((j << 2) + j + 3) >> 3);  // * 0.625
            else
            if (d < m_tf_thres2)
                m_pTFtaps[i] = Ipp8s(j >> 1);   // * 0.5
            else
            if (d < m_tf_thres3)
                m_pTFtaps[i] = Ipp8s(((j << 1) + j + 3) >> 3);  // * 0.375
            else
                m_pTFtaps[i] = 0;
        }
    }

} // UpdateAndScaleThresholds


//----------------------------------------------------------------------------
// Get filter options with given values

void CNoiseReductionFilter::GetNoiseReductionOptions(
    H264_Noise_Reduction_Options& opt)
{
    opt = m_options;

} // GetNoiseReductionOptions


//----------------------------------------------------------------------------
// Check to see if we need to allocate a local buffer for the filter and
// verify the buffer size

bool CNoiseReductionFilter::CheckBuffer(
    const Ipp32u y_pitch,
    const Ipp32u uv_pitch,
    const Ipp32u width,
    const Ipp32u height)
{
    // First check the filter taps buffer
    if (m_pTFtapsBuffer == NULL)
        return false;

    Ipp32u size;

    if (y_pitch == uv_pitch)
        size = y_pitch * (height + (height >> 1));
    else
        size = (y_pitch + uv_pitch) * height;

    // Reallocate last frame buffer if necessary
    if (size > m_uLocalBufferSize)
    {
        delete [] m_pLocalBuffer;
        m_pLocalBuffer = NULL;
        m_pLastFrame = NULL;
        m_pLastFrameY = NULL;
        m_pLastFrameU = NULL;
        m_pLastFrameV = NULL;
    }

    if (!m_pLocalBuffer)
    {
        // Extra 32 bytes for prefetching in the MMX filter
        if ((m_pLocalBuffer = new Ipp8u[size + 32 + 8]) == NULL)
        {
            return false;
        }

        // 8-byte aligned the buffer
        m_pLastFrame = H264_ALIGN(m_pLocalBuffer, 8);
        m_uLocalBufferSize = size;

        // Set up YUV buffer pointers
        m_pLastFrameY = m_pLastFrame;
        m_pLastFrameU = m_pLastFrameY + y_pitch * height;

        if (y_pitch == uv_pitch)
            m_pLastFrameV = m_pLastFrameU + (((width >> 1) + 7) & ~7);
        else
            m_pLastFrameV = m_pLastFrameU + uv_pitch * (height >> 1);
    }

    // Clear the last frame buffer if this is the first frame to be filtered
    if (m_bFirstFrame)
        memset((void *) m_pLastFrame, 0, m_uLocalBufferSize);

    return true;

} // CheckBuffer


//----------------------------------------------------------------------------
// Set filter options with given values

#define LIMIT_THRESHOLD_RANGE(x) \
    ((x) > H264_Noise_Reduction_Max_Thres ? \
            H264_Noise_Reduction_Max_Thres : (x))

#define LIMIT_THRESHOLD_RANGE_TF(x) \
    ((x) > H264_Noise_Reduction_Max_Thres_TF ? \
            H264_Noise_Reduction_Max_Thres_TF : (x))

void CNoiseReductionFilter::PutNoiseReductionOptions(
    const H264_Noise_Reduction_Options& opt)
{
    m_options.y             = opt.y;
    m_options.u             = opt.u;
    m_options.v             = opt.v;
    m_options.tf_thres1     = LIMIT_THRESHOLD_RANGE_TF(opt.tf_thres1);
    m_options.tf_thres2     = LIMIT_THRESHOLD_RANGE_TF(opt.tf_thres2);
    m_options.tf_thres3     = LIMIT_THRESHOLD_RANGE_TF(opt.tf_thres3);