brhist.c

MPEG-4编解码的实现(包括MPEG4视音频编解码)

#ifdef BRHIST
#include <string.h>
#include "brhist.h"
#include "util.h"
#include <termcap.h>


#define BRHIST_BARMAX 50
int disp_brhist = 1;
long brhist_count[15];
long brhist_temp[15];
int brhist_vbrmin;
int brhist_vbrmax;
long brhist_max;
char brhist_bps[15][5];
char brhist_backcur[200];
char brhist_bar[BRHIST_BARMAX+10];
char brhist_spc[BRHIST_BARMAX+1];

char stderr_buff[BUFSIZ];


void brhist_init(lame_global_flags *gfp,int br_min, int br_max)
{
  int i;
  char term_buff[1024];
  char *termname;
  char *tp;
  char tc[10];

  for(i = 0; i < 15; i++)
    {
      sprintf(brhist_bps[i], "%3d:", bitrate_table[gfp->version][i]);
      brhist_count[i] = 0;
      brhist_temp[i] = 0;
    }

  brhist_vbrmin = br_min;
  brhist_vbrmax = br_max;

  brhist_max = 0;

  memset(&brhist_bar[0], '*', BRHIST_BARMAX);
  brhist_bar[BRHIST_BARMAX] = '\0';
  memset(&brhist_spc[0], ' ', BRHIST_BARMAX);
  brhist_spc[BRHIST_BARMAX] = '\0';
  brhist_backcur[0] = '\0';

  if ((termname = getenv("TERM")) == NULL)
    {
      fprintf(stderr, "can't get TERM environment string.\n");
      disp_brhist = 0;
      return;
    }

  if (tgetent(term_buff, termname) != 1)
    {
      fprintf(stderr, "can't find termcap entry: %s\n", termname);
      disp_brhist = 0;
      return;
    }

  tc[0] = '\0';
  tp = &tc[0];
  tp=tgetstr("up", &tp);
  brhist_backcur[0] = '\0';
  for(i = br_min-1; i <= br_max; i++)
    strcat(brhist_backcur, tp);
  setbuf(stderr, stderr_buff);
}

void brhist_add_count(void)
{
  int i;

  for(i = brhist_vbrmin; i <= brhist_vbrmax; i++)
    {
      brhist_count[i] += brhist_temp[i];
      if (brhist_count[i] > brhist_max)
	brhist_max = brhist_count[i];
      brhist_temp[i] = 0;
    }
}

void brhist_disp(void)
{
  int i;
  long full;
  int barlen;

  full = (brhist_max < BRHIST_BARMAX) ? BRHIST_BARMAX : brhist_max;
  fputc('\n', stderr);
  for(i = brhist_vbrmin; i <= brhist_vbrmax; i++)
    {
      barlen = (brhist_count[i]*BRHIST_BARMAX+full-1) / full;
      fputs(brhist_bps[i], stderr);
      fputs(&brhist_bar[BRHIST_BARMAX - barlen], stderr);
      fputs(&brhist_spc[barlen], stderr);
      fputc('\n', stderr);
    }
  fputs(brhist_backcur, stderr);
  fflush(stderr);
}

void brhist_disp_total(lame_global_flags *gfp)
{
  int i;
  FLOAT ave;

  for(i = brhist_vbrmin; i <= brhist_vbrmax; i++)
    fputc('\n', stderr);

  ave=0;
  for(i = brhist_vbrmin; i <= brhist_vbrmax; i++)
    ave += bitrate_table[gfp->version][i]*
      (FLOAT)brhist_count[i] / gfp->totalframes;
  fprintf(stderr, "\naverage: %2.0f kbs\n",ave);
    
#if 0
  fprintf(stderr, "----- bitrate statistics -----\n");
  fprintf(stderr, " [kbps]      frames\n");
  for(i = brhist_vbrmin; i <= brhist_vbrmax; i++)
    {
      fprintf(stderr, "   %3d  %8ld (%.1f%%)\n",
	      bitrate_table[gfp->version][i],
	      brhist_count[i],
	      (FLOAT)brhist_count[i] / gfp->totalframes * 100.0);
    }
#endif
  fflush(stderr);
}

#endif /* BRHIST */