globals.c

Nokia H.264/AVC Encoder/Decoder Usage Manual

/*
COPYRIGHT, LICENSE AND WARRANTY INFORMATION

This software module has been originally developed by Nokia Corporation. 

Provided that a person, entity or a company willing to use the Software 
(hereinafter Licensee) comply with all the terms and conditions of this 
Statement and subject to the limitations set forth in this Statement Nokia 
grants to such Licensee a non-exclusive, sub-licensable, worldwide, 
limited license under copyrights owned by Nokia to use the Software for 
the sole purpose of creating, manufacturing, selling, marketing, or  
distributing (including the right to make modifications to the Software) 
a fully compliant decoder implementation (hereinafter "Decoder") of 
ITU-T Recommendation H.264 / ISO/IEC International Standard 14496-10 and 
an encoder implementation producing output that is decodable with the 
Decoder.

Nokia retains the ownership of copyrights to the Software. There is no 
patent nor other intellectual property right of Nokia licensed under this 
Statement (except the copyright license above). Licensee hereby assumes 
sole responsibility to secure any other intellectual property rights 
needed, if any. For example, if patent licenses  are required, it is 
their responsibility to acquire the license before utilizing the Software.

The license by Nokia is subject to that the Licensee grants to Nokia the 
non-exclusive, worldwide, royalty-free, perpetual and irrevocable 
covenant that the Licensee(s) shall not bring a suit before any court or 
administrative agency or otherwise assert a claim for infringement under 
the Licensee intellectual property rights that, but for a license, would 
be infringed by the Software against  
   (a)  Nokia or Nokia's Affiliate; or  
   (b)  other recipient of a license and covenant not to sue with respect 
        to the Software from Nokia; or 
   (c)  contractor, customer or distributor of a party listed above in a 
        or b,  
which suit or claim is related to the Software or use thereof.

The Licensee(s) further agrees to grant a reciprocal license to Nokia 
(as granted by Nokia to the Licensee(s) on the modifications made by 
Licensee(s) to the Software. 

THE SOFTWARE IS PROVIDED "AS IS" AND THE ORIGINAL DEVELOPER DISCLAIMS 
ANY AND ALL WARRANTIES WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING 
BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS 
FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. THOSE INTENDING TO USE 
THE SOFTWARE ARE EXPRESSLY ADVISED THAT ITS USE MAY INFRINGE EXISTING 
PATENTS AND BE SUBJECT TO ROYALTY PAYMENTS TO PATENT OWNERS. ANYONE 
USING THE SOFTWARE ON THE BASIS OF THIS LICENSE AGREES TO OBTAIN THE 
NECESSARY PERMISSIONS FROM ANY AND ALL APPLICABLE PATENT OWNERS FOR SUCH 
USE.

IN NO EVENT SHALL THE ORIGINAL DEVELOPER BE LIABLE FOR ANY CLAIM, 
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT 
OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 
OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

This copyright, license and warranty information notice must be retained 
in all copies and derivative works of the Software or substantial 
portions thereof.
*/




#include <string.h>
#include "globals.h"


/*
 * convert from H.263 QP to H.26L quant given by: quant = pow(2,QP/6)
 */
const int8 QP2QUANT[52] = {
               1, 1, 1, 1,
   1, 1, 1, 1, 1, 1, 1, 1,
   1, 1, 1, 1, 2, 2, 2, 2,
   3, 3, 3, 4, 4, 4, 5, 6,
   6, 7, 8, 9,10,11,13,14,
  16,17,20,23,25,29,32,36,
  40,45,51,57,64,72,81,91
};

/*
 * Chroma QP = qpChroma[Luma QP]
 */
const int8 qpChroma[52] = {
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,
   12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,
   28,29,29,30,31,32,32,33,34,34,35,35,36,36,37,37,
   37,38,38,38,39,39,39,39
}; 


const int8 blkRasterOrder[16] = 
{
  0, 1, 4, 5, 2, 3, 6, 7, 8, 9, 12, 13, 10, 11, 14, 15,
};


const costMeasure_s initCostMeasure = 
{MAX_COST, MAX_COST, 0, 0, MAX_COST, 
MAX_COST, MAX_COST};


/*
 *
 * staClear:
 *
 * Parameters:
 *      stat                  Statistics object
 *
 * Function:
 *      Zero out statistics
 *
 * Returns:
 *      -
 */
void staClear(statSlice_s *stat)
{
  memset(stat, 0, sizeof(statSlice_s));
}

void staNonSliceClear(statNonSliceNal_s *pstat)
{
  memset(pstat, 0, sizeof(statNonSliceNal_s));
}

/*
 *
 * staAccumulate:
 *
 * Parameters:
 *      stat1                 Statistics destination object
 *      stat2                 Statistics object
 *
 * Function:
 *      Add statistics from stat2 to stat1
 *
 * Returns:
 *      -
 */
void staAccumulate(statSlice_s *stat1, statSlice_s *stat2)
{
  int i;

  stat1->nFrames += stat2->nFrames;

  /*
   * Accumulate bits
   */
  stat1->bitsNAL          += stat2->bitsNAL;
  stat1->bitsHdr          += stat2->bitsHdr;
  stat1->bitsSkipLen      += stat2->bitsSkipLen;
  stat1->bitsMBtype       += stat2->bitsMBtype;
  stat1->bitsPred         += stat2->bitsPred;
  stat1->bitsVec          += stat2->bitsVec;
  stat1->bitsCBP          += stat2->bitsCBP;
  stat1->bitsCoefLumaDC   += stat2->bitsCoefLumaDC;
  stat1->bitsCoefLuma     += stat2->bitsCoefLuma;
  stat1->bitsCoefChromaDC += stat2->bitsCoefChromaDC;
  stat1->bitsCoefChroma   += stat2->bitsCoefChroma;
  stat1->bitsArithmeticStream += stat2->bitsArithmeticStream;

  /*
   * Accumulate modes
   */
  stat1->intraModeCtr1 += stat2->intraModeCtr1;
  for (i = 0; i < MAX_MODES; i++)
    stat1->intraModeCtr2[i] += stat2->intraModeCtr2[i];
  for (i = 0; i < MAX_MODES; i++)
    stat1->interModeCtr[i] += stat2->interModeCtr[i];

  /*
   * Accumulate psnr
   */
  stat1->psnrY += stat2->psnrY;
  stat1->psnrU += stat2->psnrU;
  stat1->psnrV += stat2->psnrV;
}


/*
 *
 * staGetTotalBits:
 *
 * Parameters:
 *      stat                  Statistics object
 *
 * Function:
 *      Get total number of bits in given statistics
 *
 * Returns:
 *      Number of bits
 *
 */
int staGetTotalBits(statSlice_s *stat)
{
  return (
    stat->bitsNAL +
    stat->bitsHdr +
    stat->bitsSkipLen +
    stat->bitsMBtype +
    stat->bitsPred +
    stat->bitsVec +
    stat->bitsCBP +
    stat->bitsCoefLumaDC +
    stat->bitsCoefLuma +
    stat->bitsCoefChromaDC +
    stat->bitsCoefChroma +
    stat->bitsArithmeticStream
  );
}


/*
 *
 * staGetTotalChromaBits:
 *
 * Parameters:
 *      stat                  Statistics object
 *
 * Function:
 *      Get total number of chroma coef bits in given statistics
 *
 * Returns:
 *      Number of bits
 *
 */
int staGetTotalChromaBits(statSlice_s *stat)
{
  return (
    stat->bitsCoefChromaDC +
    stat->bitsCoefChroma
  );
}


/*
 *
 * CalculateSsd:
 *
 * Parameters:
 *      orig                  Original pixels
 *      origBufWidth          Width of the original buffer
 *      reco                  Reconstructed pixels
 *      recoBufWidth          Width of the reconstructed pixel buffer
 *      width                 Number of pixels to compare, horizontally
 *      height                Number of pixels to compare, vertically
 *
 * Function:
 *      Calculate the sum of squared differences between the original pixels 
 *      and the reconstructed pixels.
 *      
 * Returns:
 *      Sum of squared difference.
 */
int CalculateSsd(u_int8 *orig, 
                 int    origBufWidth, 
                 u_int8 *reco, 
                 int    recoBufWidth,
                 int    width, 
                 int    height)
{
  int i, j, ssd;

  ssd = 0;
  for (i = 0; i < height; i ++)
  {
    for (j = 0; j < width; j ++)
    {
      int diff;

      diff = (int) orig[j] - (int) reco[j];
      ssd += diff * diff;
    }

    orig += origBufWidth;
    reco += recoBufWidth;
  }

  return ssd;
}


/*
 *
 * CalculateEdgeSsd:
 *
 * Parameters:
 *      orig                  Original pixels
 *      origBufWidth          Width of the original buffer
 *      reco                  Reconstructed pixels
 *      recoBufWidth          Width of the reconstructed pixel buffer
 *      width                 Number of pixels to compare, horizontally
 *      height                Number of pixels to compare, vertically
 *
 * Function:
 *      Calculate the sum of squared differences between the original pixels 
 *      and the reconstructed pixels at the right and bottom boundaries.
 *      The bottom-right corner will be included twice.
 *      
 * Returns:
 *      Sum of squared difference.
 */
int CalculateEdgeSsd(u_int8 *orig, 
                     int    origBufWidth, 
                     u_int8 *reco, 
                     int    recoBufWidth,
                     int    width, 
                     int    height,
                     int    rightMb,
                     int    bottomMb)
{
  int i, diff, ssd;

  ssd = 0;

  if (! rightMb)
  {
    for (i = 0; i < height; i ++)
    {
      diff = (int) orig[i * origBufWidth + width - 1] - (int) reco[i * recoBufWidth + width - 1];
      ssd += diff * diff;
    }
  }

  if (! bottomMb)
  {
    orig += (height - 1) * origBufWidth;
    reco += (height - 1) * recoBufWidth;

    for (i = 0; i < width; i ++)
    {
      diff = (int) orig[i] - (int) reco[i];
      ssd += diff * diff;
    }
  }

  return ssd;
}

/*
 *
 * CalculateSAD:
 *
 * Parameters:
 *      orig                  Original pixels
 *      origBufWidth          Width of the original buffer
 *      reco                  Reconstructed pixels
 *      recoBufWidth          Width of the reconstructed pixel buffer
 *      width                 Number of pixels to compare, horizontally
 *      height                Number of pixels to compare, vertically
 *
 * Function:
 *      Calculate the sum of absolute differences between the original pixels 
 *      and the reconstructed pixels.
 *      
 * Returns:
 *      Sum of squared difference.
 */
int CalculateSad(u_int8 *orig, 
                 int    origBufWidth, 
                 u_int8 *reco, 
                 int    recoBufWidth,
                 int    width, 
                 int    height)
{
  int i, j, sad;

  sad = 0;
  for (i = 0; i < height; i ++)
  {
    for (j = 0; j < width; j ++)
    {
      int diff;

      diff = (int) orig[j] - (int) reco[j];
    if(diff<0)
      sad=sad-diff;
    else
      sad+=diff;
      
    }

    orig += origBufWidth;
    reco += recoBufWidth;
  }

  return sad;
}