h263_enc_headers.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) 2005 Intel Corporation. All Rights Reserved.
//
//  Description:    class ippVideoEncoderH263 (put headers to bitstream)
//  Contents:
//                  EncodePicture_Header
//
*/

#include "h263_enc.hpp"


void ippVideoEncoderH263::EncodeZeroBitsAlign()
{
    if (cBS.mBitOff != 0)
        cBS.PutBits(0, 8 - cBS.mBitOff);
}


void ippVideoEncoderH263::EncodeStuffingBitsAlign()
{
    cBS.PutBits(0xFF >> (cBS.mBitOff + 1), 8 - cBS.mBitOff);
}


void ippVideoEncoderH263::EncodePicture_Header()
{
  cBS.PutBits(32, 22);
  cBS.PutBits(VOP.temporal_reference, 8);
  cBS.PutMarkerBit();
  cBS.PutZeroBit();
  cBS.PutBits(VOP.split_screen_indicator, 1);
  cBS.PutBits(VOP.document_camera_indicator, 1);
  cBS.PutBits(VOP.full_picture_freeze_release, 1);

  VOP.plusptype = VOP.advIntra || VOP.modQuant || (VOP.UMV > 1) ; // TODO: update when adding modes
  if (VOP.plusptype) {
    if (VOP.picture_coding_type == H263_PIC_TYPE_I)
      VOP.ufep = 1; // ???
    if (VOP.UMV == 1) // switch to PLUSPTYPE UMV mode
      VOP.UMV = 2;
  }


  if (!VOP.plusptype) {
    cBS.PutBits(VOP.source_format, 3);
    cBS.PutBits(VOP.picture_coding_type, 1);
    cBS.PutBits(VOP.UMV, 1);
    cBS.PutBits(VOP.SAC, 1);
    cBS.PutBits(VOP.advPred, 1);
    cBS.PutBits(VOP.PBframes, 1);
    cBS.PutBits(VOP.vop_quant, 5);
    cBS.PutBits(VOP.CPM, 1);
    if (VOP.CPM)
      cBS.PutBits(VOP.PSBI, 1);
    VOP.vop_rounding_type = 0;
  } else { // PLUSPTYUPE
    cBS.PutBits(7, 3);
    cBS.PutBits(VOP.ufep, 3);
    if (VOP.ufep == 1) { // OPPTYPE
      cBS.PutBits(VOP.source_format, 3);
      cBS.PutBits(VOP.PCF, 1);
      cBS.PutBits(VOP.UMV ? 1 : 0, 1);
      cBS.PutBits(VOP.SAC, 1);
      cBS.PutBits(VOP.advPred, 1);

      cBS.PutBits(VOP.advIntra, 1);
      cBS.PutBits(VOP.deblockFilt, 1);
      cBS.PutBits(VOP.sliceStruct, 1);

      cBS.PutBits(VOP.RPS, 1);
      cBS.PutBits(VOP.ISD, 1);
      cBS.PutBits(VOP.altInterVLC, 1);
      cBS.PutBits(VOP.modQuant, 1);

      cBS.PutBits(8, 4); // anti-emulation + 3 reserved
    }

    // MPPTYPE
    cBS.PutBits(VOP.picture_coding_type, 3);
    cBS.PutBits(VOP.resample, 1);
    cBS.PutBits(VOP.redResUp, 1);

    if (VOP.picture_coding_type == H263_PIC_TYPE_P || VOP.picture_coding_type == H263_PIC_TYPE_iPB)
      VOP.vop_rounding_type ^= 1;

    cBS.PutBits(VOP.vop_rounding_type, 1);
    cBS.PutBits(1, 3); // 3 reserved + anti-emulation

    cBS.PutBits(VOP.CPM, 1);
    if (VOP.CPM)
      cBS.PutBits(VOP.PSBI, 1);

    if (VOP.ufep == 1) {
      if (VOP.source_format == 6) {
        int pwhi;
        cBS.PutBits(VOP.PAR_code, 4);
        pwhi = (VOP.vop_width >> 2) - 1;
        cBS.PutBits(pwhi, 9);
        cBS.PutBits(1, 1); // anti-emulation
        pwhi = VOP.vop_height >> 2;
        cBS.PutBits(pwhi, 9);
        if (VOP.PAR_code == H263_ASPECT_RATIO_EXTPAR) { //
          cBS.PutBits(VOP.PAR_width, 8);
          cBS.PutBits(VOP.PAR_height, 8);
        }
      }
      if (VOP.PCF) {
        cBS.PutBits(VOP.clock_conversion_code, 1);
        cBS.PutBits(VOP.clock_divisor, 7);
      }
    }

    if (VOP.PCF)
      cBS.PutBits(VOP.temporal_reference >> 8, 2);

    if (VOP.ufep == 1) {
      if (VOP.UMV)
        cBS.PutBits(1, VOP.UMV - 1); // VOP.UMV == 2 or 3
      if (VOP.sliceStruct)
        cBS.PutBits(VOP.sliceSubmodes, 2);
    }

    if (VOP.picture_coding_type == H263_PIC_TYPE_B || VOP.picture_coding_type == H263_PIC_TYPE_EP || VOP.picture_coding_type == H263_PIC_TYPE_EI) {
      VOP.scalability = 1;
      cBS.PutBits(VOP.enh_layer_num, 4);

      if (VOP.ufep == 1) {
        cBS.PutBits(VOP.ref_layer_num, 4);
      }
    }

#if 0
    // Reference Picture Selection mode
    if (VOP.RPS) {
      if (VOP.ufep == 1)
        cBS.PutBits(VOP.RPSflags, 3);

      cBS.PutBits(VOP.TRPI, 1);
      if (VOP.TRPI)
        cBS.PutBits(VOP.pred_temp_ref, 10);

      if (VOP.BCI) {
        cBS.PutBits(1, 1);
        // EncodeBCM -  not implemented yet. TODO ???
      } else
        cBS.PutBits(1, 2);
    }
#endif

    if (VOP.resample) {
      cBS.PutBits((VOP.wda | 2), 2);
      // EncodeResampleParams - not implemented yet. TODO
    }

    cBS.PutBits(VOP.vop_quant, 5);
  }

  if (VOP.PBframes) {
    cBS.PutBits(VOP.temporal_reference_B, 3);
    cBS.PutBits(VOP.dbquant, 2);
  }
  cBS.PutZeroBit(); // pei
}