stats.c
资源名称:mpeg2.rar [点击查看]
上传用户:ma_junhua
上传日期:2008-04-11
资源大小:2752k
文件大小:11k
源码类别:
其他嵌入式/单片机内容
开发平台:
C/C++
- /* stats.c, coding statistics */
- /* Copyright (C) 1996, MPEG Software Simulation Group. All Rights Reserved. */
- /*
- * Disclaimer of Warranty
- *
- * These software programs are available to the user without any license fee or
- * royalty on an "as is" basis. The MPEG Software Simulation Group disclaims
- * any and all warranties, whether express, implied, or statuary, including any
- * implied warranties or merchantability or of fitness for a particular
- * purpose. In no event shall the copyright-holder be liable for any
- * incidental, punitive, or consequential damages of any kind whatsoever
- * arising from the use of these programs.
- *
- * This disclaimer of warranty extends to the user of these programs and user's
- * customers, employees, agents, transferees, successors, and assigns.
- *
- * The MPEG Software Simulation Group does not represent or warrant that the
- * programs furnished hereunder are free of infringement of any third-party
- * patents.
- *
- * Commercial implementations of MPEG-1 and MPEG-2 video, including shareware,
- * are subject to royalty fees to patent holders. Many of these patents are
- * general enough such that they are unavoidable regardless of implementation
- * design.
- *
- */
- #include <stdio.h>
- #include <math.h>
- #include "config.h"
- #include "global.h"
- /* private prototypes */
- static void calcSNR1 _ANSI_ARGS_((unsigned char *org, unsigned char *rec,
- int lx, int w, int h, double *pv, double *pe));
- void calcSNR(org,rec)
- unsigned char *org[3];
- unsigned char *rec[3];
- {
- int w,h,offs;
- double v,e;
- w = horizontal_size;
- h = (pict_struct==FRAME_PICTURE) ? vertical_size : (vertical_size>>1);
- offs = (pict_struct==BOTTOM_FIELD) ? width : 0;
- calcSNR1(org[0]+offs,rec[0]+offs,width2,w,h,&v,&e);
- fprintf(statfile,"Y: variance=%4.4g, MSE=%3.3g (%3.3g dB), SNR=%3.3g dBn",
- v, e, 10.0*log10(255.0*255.0/e), 10.0*log10(v/e));
- if (chroma_format!=CHROMA444)
- {
- w >>= 1;
- offs >>= 1;
- }
- if (chroma_format==CHROMA420)
- h >>= 1;
- calcSNR1(org[1]+offs,rec[1]+offs,chrom_width2,w,h,&v,&e);
- fprintf(statfile,"U: variance=%4.4g, MSE=%3.3g (%3.3g dB), SNR=%3.3g dBn",
- v, e, 10.0*log10(255.0*255.0/e), 10.0*log10(v/e));
- calcSNR1(org[2]+offs,rec[2]+offs,chrom_width2,w,h,&v,&e);
- fprintf(statfile,"V: variance=%4.4g, MSE=%3.3g (%3.3g dB), SNR=%3.3g dBn",
- v, e, 10.0*log10(255.0*255.0/e), 10.0*log10(v/e));
- }
- static void calcSNR1(org,rec,lx,w,h,pv,pe)
- unsigned char *org;
- unsigned char *rec;
- int lx,w,h;
- double *pv,*pe;
- {
- int i, j;
- double v1, s1, s2, e2;
- s1 = s2 = e2 = 0.0;
- for (j=0; j<h; j++)
- {
- for (i=0; i<w; i++)
- {
- v1 = org[i];
- s1+= v1;
- s2+= v1*v1;
- v1-= rec[i];
- e2+= v1*v1;
- }
- org += lx;
- rec += lx;
- }
- s1 /= w*h;
- s2 /= w*h;
- e2 /= w*h;
- /* prevent division by zero in calcSNR() */
- if(e2==0.0)
- e2 = 0.00001;
- *pv = s2 - s1*s1; /* variance */
- *pe = e2; /* MSE */
- }
- void stats()
- {
- int i, j, k, nmb, mb_type;
- int n_skipped, n_intra, n_ncoded, n_blocks, n_interp, n_forward, n_backward;
- struct mbinfo *mbi;
- nmb = mb_width*mb_height2;
- n_skipped=n_intra=n_ncoded=n_blocks=n_interp=n_forward=n_backward=0;
- for (k=0; k<nmb; k++)
- {
- mbi = mbinfo+k;
- if (mbi->skipped)
- n_skipped++;
- else if (mbi->mb_type & MB_INTRA)
- n_intra++;
- else if (!(mbi->mb_type & MB_PATTERN))
- n_ncoded++;
- for (i=0; i<block_count; i++)
- if (mbi->cbp & (1<<i))
- n_blocks++;
- if (mbi->mb_type & MB_FORWARD)
- {
- if (mbi->mb_type & MB_BACKWARD)
- n_interp++;
- else
- n_forward++;
- }
- else if (mbi->mb_type & MB_BACKWARD)
- n_backward++;
- }
- fprintf(statfile,"npicture statistics:n");
- fprintf(statfile," # of intra coded macroblocks: %4d (%.1f%%)n",
- n_intra,100.0*(double)n_intra/nmb);
- fprintf(statfile," # of coded blocks: %4d (%.1f%%)n",
- n_blocks,100.0*(double)n_blocks/(block_count*nmb));
- fprintf(statfile," # of not coded macroblocks: %4d (%.1f%%)n",
- n_ncoded,100.0*(double)n_ncoded/nmb);
- fprintf(statfile," # of skipped macroblocks: %4d (%.1f%%)n",
- n_skipped,100.0*(double)n_skipped/nmb);
- fprintf(statfile," # of forw. pred. macroblocks: %4d (%.1f%%)n",
- n_forward,100.0*(double)n_forward/nmb);
- fprintf(statfile," # of backw. pred. macroblocks: %4d (%.1f%%)n",
- n_backward,100.0*(double)n_backward/nmb);
- fprintf(statfile," # of interpolated macroblocks: %4d (%.1f%%)n",
- n_interp,100.0*(double)n_interp/nmb);
- fprintf(statfile,"nmacroblock_type map:n");
- k = 0;
- for (j=0; j<mb_height2; j++)
- {
- for (i=0; i<mb_width; i++)
- {
- mbi = mbinfo + k;
- mb_type = mbi->mb_type;
- if (mbi->skipped)
- putc('S',statfile);
- else if (mb_type & MB_INTRA)
- putc('I',statfile);
- else switch (mb_type & (MB_FORWARD|MB_BACKWARD))
- {
- case MB_FORWARD:
- putc(mbi->motion_type==MC_FIELD ? 'f' :
- mbi->motion_type==MC_DMV ? 'p' :
- 'F',statfile); break;
- case MB_BACKWARD:
- putc(mbi->motion_type==MC_FIELD ? 'b' :
- 'B',statfile); break;
- case MB_FORWARD|MB_BACKWARD:
- putc(mbi->motion_type==MC_FIELD ? 'd' :
- 'D',statfile); break;
- default:
- putc('0',statfile); break;
- }
- if (mb_type & MB_QUANT)
- putc('Q',statfile);
- else if (mb_type & (MB_PATTERN|MB_INTRA))
- putc(' ',statfile);
- else
- putc('N',statfile);
- putc(' ',statfile);
- k++;
- }
- putc('n',statfile);
- }
- fprintf(statfile,"nmquant map:n");
- k=0;
- for (j=0; j<mb_height2; j++)
- {
- for (i=0; i<mb_width; i++)
- {
- if (i==0 || mbinfo[k].mquant!=mbinfo[k-1].mquant)
- fprintf(statfile,"%3d",mbinfo[k].mquant);
- else
- fprintf(statfile," ");
- k++;
- }
- putc('n',statfile);
- }
- #if 0
- fprintf(statfile,"ncbp map:n");
- k=0;
- for (j=0; j<mb_height2; j++)
- {
- for (i=0; i<mb_width; i++)
- {
- fprintf(statfile,"%02x ",mbinfo[k].cbp);
- k++;
- }
- putc('n',statfile);
- }
- if (pict_struct==FRAME_PICTURE && !frame_pred_dct)
- {
- fprintf(statfile,"ndct_type map:n");
- k=0;
- for (j=0; j<mb_height2; j++)
- {
- for (i=0; i<mb_width; i++)
- {
- if (mbinfo[k].mb_type & (MB_PATTERN|MB_INTRA))
- fprintf(statfile,"%d ",mbinfo[k].dct_type);
- else
- fprintf(statfile," ");
- k++;
- }
- putc('n',statfile);
- }
- }
- if (pict_type!=I_TYPE)
- {
- fprintf(statfile,"nforward motion vectors (first vector, horizontal):n");
- k=0;
- for (j=0; j<mb_height2; j++)
- {
- for (i=0; i<mb_width; i++)
- {
- if (mbinfo[k].mb_type & MB_FORWARD)
- fprintf(statfile,"%4d",mbinfo[k].MV[0][0][0]);
- else
- fprintf(statfile," .");
- k++;
- }
- putc('n',statfile);
- }
- fprintf(statfile,"nforward motion vectors (first vector, vertical):n");
- k=0;
- for (j=0; j<mb_height2; j++)
- {
- for (i=0; i<mb_width; i++)
- {
- if (mbinfo[k].mb_type & MB_FORWARD)
- fprintf(statfile,"%4d",mbinfo[k].MV[0][0][1]);
- else
- fprintf(statfile," .");
- k++;
- }
- putc('n',statfile);
- }
- fprintf(statfile,"nforward motion vectors (second vector, horizontal):n");
- k=0;
- for (j=0; j<mb_height2; j++)
- {
- for (i=0; i<mb_width; i++)
- {
- if (mbinfo[k].mb_type & MB_FORWARD
- && ((pict_struct==FRAME_PICTURE && mbinfo[k].motion_type==MC_FIELD) ||
- (pict_struct!=FRAME_PICTURE && mbinfo[k].motion_type==MC_16X8)))
- fprintf(statfile,"%4d",mbinfo[k].MV[1][0][0]);
- else
- fprintf(statfile," .");
- k++;
- }
- putc('n',statfile);
- }
- fprintf(statfile,"nforward motion vectors (second vector, vertical):n");
- k=0;
- for (j=0; j<mb_height2; j++)
- {
- for (i=0; i<mb_width; i++)
- {
- if (mbinfo[k].mb_type & MB_FORWARD
- && ((pict_struct==FRAME_PICTURE && mbinfo[k].motion_type==MC_FIELD) ||
- (pict_struct!=FRAME_PICTURE && mbinfo[k].motion_type==MC_16X8)))
- fprintf(statfile,"%4d",mbinfo[k].MV[1][0][1]);
- else
- fprintf(statfile," .");
- k++;
- }
- putc('n',statfile);
- }
- }
- if (pict_type==B_TYPE)
- {
- fprintf(statfile,"nbackward motion vectors (first vector, horizontal):n");
- k=0;
- for (j=0; j<mb_height2; j++)
- {
- for (i=0; i<mb_width; i++)
- {
- if (mbinfo[k].mb_type & MB_BACKWARD)
- fprintf(statfile,"%4d",mbinfo[k].MV[0][1][0]);
- else
- fprintf(statfile," .");
- k++;
- }
- putc('n',statfile);
- }
- fprintf(statfile,"nbackward motion vectors (first vector, vertical):n");
- k=0;
- for (j=0; j<mb_height2; j++)
- {
- for (i=0; i<mb_width; i++)
- {
- if (mbinfo[k].mb_type & MB_BACKWARD)
- fprintf(statfile,"%4d",mbinfo[k].MV[0][1][1]);
- else
- fprintf(statfile," .");
- k++;
- }
- putc('n',statfile);
- }
- fprintf(statfile,"nbackward motion vectors (second vector, horizontal):n");
- k=0;
- for (j=0; j<mb_height2; j++)
- {
- for (i=0; i<mb_width; i++)
- {
- if (mbinfo[k].mb_type & MB_BACKWARD
- && ((pict_struct==FRAME_PICTURE && mbinfo[k].motion_type==MC_FIELD) ||
- (pict_struct!=FRAME_PICTURE && mbinfo[k].motion_type==MC_16X8)))
- fprintf(statfile,"%4d",mbinfo[k].MV[1][1][0]);
- else
- fprintf(statfile," .");
- k++;
- }
- putc('n',statfile);
- }
- fprintf(statfile,"nbackward motion vectors (second vector, vertical):n");
- k=0;
- for (j=0; j<mb_height2; j++)
- {
- for (i=0; i<mb_width; i++)
- {
- if (mbinfo[k].mb_type & MB_BACKWARD
- && ((pict_struct==FRAME_PICTURE && mbinfo[k].motion_type==MC_FIELD) ||
- (pict_struct!=FRAME_PICTURE && mbinfo[k].motion_type==MC_16X8)))
- fprintf(statfile,"%4d",mbinfo[k].MV[1][1][1]);
- else
- fprintf(statfile," .");
- k++;
- }
- putc('n',statfile);
- }
- }
- #endif
- #if 0
- /* useful for debugging */
- fprintf(statfile,"nmacroblock info dump:n");
- k=0;
- for (j=0; j<mb_height2; j++)
- {
- for (i=0; i<mb_width; i++)
- {
- fprintf(statfile,"%d: %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %dn",
- k,
- mbinfo[k].mb_type,
- mbinfo[k].motion_type,
- mbinfo[k].dct_type,
- mbinfo[k].mquant,
- mbinfo[k].cbp,
- mbinfo[k].skipped,
- mbinfo[k].MV[0][0][0],
- mbinfo[k].MV[0][0][1],
- mbinfo[k].MV[0][1][0],
- mbinfo[k].MV[0][1][1],
- mbinfo[k].MV[1][0][0],
- mbinfo[k].MV[1][0][1],
- mbinfo[k].MV[1][1][0],
- mbinfo[k].MV[1][1][1],
- mbinfo[k].mv_field_sel[0][0],
- mbinfo[k].mv_field_sel[0][1],
- mbinfo[k].mv_field_sel[1][0],
- mbinfo[k].mv_field_sel[1][1]);
- k++;
- }
- }
- #endif
- }