lencod.c

H.264视频编解码的标准测试模型

     //Rate control
    if (img->type == I_SLICE)
    {
      if(input->RCEnable)
      {
        if (input->intra_period == 0)
        {
          n = input->no_frames + (input->no_frames - 1) * input->successive_Bframe;
          
          /* number of P frames */
          np = input->no_frames-1; 
          
          /* number of B frames */
          nb = (input->no_frames - 1) * input->successive_Bframe;
        }
        else
        {
          N = input->intra_period*(input->successive_Bframe+1);
          M = input->successive_Bframe+1;
          n = (img->number==0) ? N - ( M - 1) : N;
          
          /* last GOP may contain less frames */
          if(img->number/input->intra_period >= input->no_frames / input->intra_period)
          {
            if (img->number != 0)
              n = (input->no_frames - img->number) + (input->no_frames - img->number - 1) * input->successive_Bframe + input->successive_Bframe;
            else
              n = input->no_frames  + (input->no_frames - 1) * input->successive_Bframe;
          }
          
          /* number of P frames */
          if (img->number == 0)
            np = (n + 2 * (M - 1)) / M - 1; /* first GOP */
          else
            np = (n + (M - 1)) / M - 1;
          
          /* number of B frames */
          nb = n - np - 1;
        }
        rc_init_GOP(np,nb);
      }
    }


    // which layer the image belonged to?
    if ( IMG_NUMBER % (input->NumFramesInELSubSeq+1) == 0 )
      img->layer = 0;
    else
      img->layer = 1;

    encode_one_frame(); // encode one I- or P-frame
    if (img->type == I_SLICE && input->EnableOpenGOP)
      img->last_valid_reference = img->ThisPOC;

    if (input->ReportFrameStats)
      report_frame_statistic();
    
    if (img->nal_reference_idc == 0)
    {
      primary_disp ++;
      img->frame_num -= 1;
      img->frame_num %= (1 << (log2_max_frame_num_minus4 + 4));
    }    
    encode_enhancement_layer();
    
    process_2nd_IGOP();
  }
  // terminate sequence
  terminate_sequence();

  flush_dpb();

  close(p_in);
  if (-1!=p_dec)
    close(p_dec);
  if (p_trace)
    fclose(p_trace);

  Clear_Motion_Search_Module ();

  RandomIntraUninit();
  FmoUninit();
  
  if (input->PyramidCoding)
    clear_gop_structure ();

  // free structure for rd-opt. mode decision
  clear_rdopt ();

#ifdef _LEAKYBUCKET_
  calc_buffer();
#endif

  // report everything
  report();

  free_picture (frame_pic_1);
  
  if (input->RDPictureDecision)
  {
    free_picture (frame_pic_2);
    free_picture (frame_pic_3);
  }

  if (top_pic)
    free_picture (top_pic);
  if (bottom_pic)
    free_picture (bottom_pic);

  free_dpb();
  free_colocated(Co_located);
  uninit_out_buffer();

  free_global_buffers();

  // free image mem
  free_img ();
  free_context_memory ();
  FreeNalPayloadBuffer();
  FreeParameterSets();
  return 0;                         //encode JM73_FME version
}
/*!
 ***********************************************************************
 * \brief
 *    Terminates and reports statistics on error.
 * 
 ***********************************************************************
 */
void report_stats_on_error(void)
{
  input->no_frames=img->number;
  terminate_sequence();

  flush_dpb();
  
  close(p_in);
  if (-1!=p_dec)
    close(p_dec);

  if (p_trace)
    fclose(p_trace);
  
  Clear_Motion_Search_Module ();
  
  RandomIntraUninit();
  FmoUninit();
  
  if (input->PyramidCoding)
    clear_gop_structure ();
  
  // free structure for rd-opt. mode decision
  clear_rdopt ();
  
#ifdef _LEAKYBUCKET_
  calc_buffer();
#endif

  if (input->ReportFrameStats)
    report_frame_statistic();
  
  // report everything
  report();
  
  free_picture (frame_pic_1);
  if (top_pic)
    free_picture (top_pic);
  if (bottom_pic)
    free_picture (bottom_pic);
  
  free_dpb();
  free_colocated(Co_located);
  uninit_out_buffer();
  
  free_global_buffers();
  
  // free image mem
  free_img ();
  free_context_memory ();
  FreeNalPayloadBuffer();
  FreeParameterSets();
}

/*!
 ***********************************************************************
 * \brief
 *    Initializes the POC structure with appropriate parameters.
 * 
 ***********************************************************************
 */
void init_poc()
{
  //the following should probably go in sequence parameters
  // frame poc's increase by 2, field poc's by 1

  img->pic_order_cnt_type=input->pic_order_cnt_type;

  img->delta_pic_order_always_zero_flag=0;
  img->num_ref_frames_in_pic_order_cnt_cycle= 1;

  if (input->BRefPictures == 1)
  {
    img->offset_for_non_ref_pic  =   0;
    img->offset_for_ref_frame[0] =   2;
  }
  else
  {
    img->offset_for_non_ref_pic  =  -2*(input->successive_Bframe);
    img->offset_for_ref_frame[0] =   2*(input->successive_Bframe+1);
  }

  if ((input->PicInterlace==FRAME_CODING)&&(input->MbInterlace==FRAME_CODING))
    img->offset_for_top_to_bottom_field=0;
  else    
    img->offset_for_top_to_bottom_field=1;

  if ((input->PicInterlace==FRAME_CODING)&&(input->MbInterlace==FRAME_CODING))
  {
    img->pic_order_present_flag=0;
    img->delta_pic_order_cnt_bottom = 0;
  }
  else    
  {
    img->pic_order_present_flag=1;
    img->delta_pic_order_cnt_bottom = 1;
  }
}


/*!
 ***********************************************************************
 * \brief
 *    Initializes the img->nz_coeff
 * \par Input:
 *    none
 * \par  Output:
 *    none
 * \ side effects
 *    sets omg->nz_coef[][][][] to -1
 ***********************************************************************
 */
void CAVLC_init(void)
{
  unsigned int i, k, l;

  for (i=0;i < img->PicSizeInMbs; i++)
    for (k=0;k<4;k++)
      for (l=0;l < (4 + (unsigned int)img->num_blk8x8_uv);l++)
        img->nz_coeff[i][k][l]=0;
}


/*!
 ***********************************************************************
 * \brief
 *    Initializes the Image structure with appropriate parameters.
 * \par Input:
 *    Input Parameters struct inp_par *inp
 * \par  Output:
 *    Image Parameters struct img_par *img
 ***********************************************************************
 */
void init_img()
{
  int i,j;
  int byte_abs_range;

  static int mb_width_cr[4] = {0,8, 8,16};
  static int mb_height_cr[4]= {0,8,16,16};

  img->yuv_format = input->yuv_format;

  //pel bitdepth init
  img->bitdepth_luma   = input->BitDepthLuma;
  
  img->bitdepth_luma_qp_scale   = 6*(img->bitdepth_luma   - 8);
  img->bitdepth_lambda_scale    = 2*(img->bitdepth_luma   - 8);

  img->dc_pred_value = 1<<(img->bitdepth_luma - 1);
  img->max_imgpel_value = (1<<img->bitdepth_luma) - 1;

  if (img->yuv_format != YUV400)  
  {
    img->bitdepth_chroma     = input->BitDepthChroma;
    img->max_imgpel_value_uv = (1<<img->bitdepth_chroma) - 1;
    img->num_blk8x8_uv       = (1<<img->yuv_format)&(~(0x1));
    img->num_cdc_coeff       = img->num_blk8x8_uv<<1;
    img->mb_cr_size_x        = (img->yuv_format==YUV420 || img->yuv_format==YUV422)? 8:16;
    img->mb_cr_size_y        = (img->yuv_format==YUV444 || img->yuv_format==YUV422)? 16:8;

    img->bitdepth_chroma_qp_scale = 6*(img->bitdepth_chroma - 8);
    if(img->residue_transform_flag)
      img->bitdepth_chroma_qp_scale += 6;

    img->chroma_qp_offset[0] = active_pps->cb_qp_index_offset;
    img->chroma_qp_offset[1] = active_pps->cr_qp_index_offset;
  }
  else
  {
    img->bitdepth_chroma     = 0;
    img->max_imgpel_value_uv = 0;
    img->num_blk8x8_uv       = 0;
    img->num_cdc_coeff       = 0;
    img->mb_cr_size_x        = 0;
    img->mb_cr_size_y        = 0;
    
    img->bitdepth_chroma_qp_scale = 0;
    img->bitdepth_chroma_qp_scale = 0;
    
    img->chroma_qp_offset[0] = 0;
    img->chroma_qp_offset[1] = 0;
  }

  if((img->bitdepth_luma > img->bitdepth_chroma) || img->yuv_format == YUV400)
    img->pic_unit_size_on_disk = (img->bitdepth_luma > 8)? 16:8;
  else
    img->pic_unit_size_on_disk = (img->bitdepth_chroma > 8)? 16:8;

  img->num_ref_frames = active_sps->num_ref_frames;
  img->max_num_references   = active_sps->frame_mbs_only_flag ? active_sps->num_ref_frames : 2 * active_sps->num_ref_frames;

  img->buf_cycle = input->num_ref_frames;

  img->DeblockCall = 0;

//  img->framerate=INIT_FRAME_RATE;   // The basic frame rate (of the original sequence)
  img->framerate=(float) input->FrameRate;   // The basic frame rate (of the original sequence)