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From jaromil <jaromil@kyuzz.org>
Date Sat, 24 Aug 2002 14:56:20 +0200
Subject Re: [HaCkmEeTiNg] maybe utile 4 mediattivisti con portatili in giro, anal mode on, siege hill 

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On Fri, Aug 23, 2002 at 05:43:44PM +0200, jaromil wrote:
> piuttosto di muse pensavo di usare un programmillo in c piu' piccolo,
> che utilizza solo parte dei codici di muse

intanto oggi ho scritto questo, che e' un vumeter su commandline, prende
da stdin e sputa in stdout, ottimo da usare per dei pipe
mo tra un po' ci metto anche qualche opzioncina e un gestore dei segnali
per un quit piu' decente al ctrl-c

ecco il codice
(lo posto qui dai, tanto e' anche piu' leggero dello spam che ci passa
di solito)

=== vumeter.c = cut-here ===

/* commandline VUMETER
 * Copyright (C) 2002 Denis Rojo aka jaromil <jaromil@dyne.org>
 *
 * This source code is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Public License as published 
 * by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * This source code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * Please refer to the GNU Public License for more details.
 *
 * You should have received a copy of the GNU Public License along with
 * this source code; if not, write to:
 * Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 *
 * to compile:
 * gcc -o vumeter vumeter.c
 *
 * this sucks from stdin and spits in stdout
 */

#include <stdio.h>
#define CHUNK_SIZE 16192
#define SCR_WIDTH 80
#define BAR_WIDTH (SCR_WIDTH-10)

static short buf[CHUNK_SIZE];

int main(int argc, char **argv) {
  int c,cc, cpeak, readed = 0;
  long peak[8];
  unsigned long vumeter = 0, vubarsize = 0;
  int vupercent = 0;
  char *p,vubar[SCR_WIDTH];

  
  while(!feof(stdin)) {
    readed = fread(buf,1,CHUNK_SIZE,stdin);
    if(ferror(stdin))
      perror("error reading from STDIN: ");

    peak[0] = 0; peak[1] = 0; peak[2] = 0; peak[3] = 0;
    peak[4] = 0; peak[5] = 0; peak[6] = 0; peak[7] = 0;
    for(cpeak=0;cpeak<8;cpeak++) {
      cc = (CHUNK_SIZE>>3)*cpeak;
      for(c=0;c<CHUNK_SIZE>>3;c++)
	if (buf[cc+c]>peak[cpeak]) peak[cpeak] = buf[cc+c];
    }
    vumeter = (peak[0]+peak[1]+peak[2]+peak[3]+
	       peak[4]+peak[5]+peak[6]+peak[7])>>3;
    vumeter = (vumeter<0)?0:vumeter;

    /* MAX_vumeter : width = vumeter : vubarsize
       qualcuno ha un poster di euclide da regalarmi? */
    vubarsize = (BAR_WIDTH*vumeter)>>14; // (/16383);
    p = vubar; for(c=0;c<vubarsize;c++,p++) *p='#'; *p='\0';    
    vupercent = ((vumeter*100)>>14)+1;
    fprintf(stderr,"\rVOL [%-69s] %3i%%\r\0",vubar,vupercent);
    fwrite(buf,1,readed,stdout);
  }
  exit(1);
}

=== cut-here ===

corto eh ? :D

- -- 
jaromil  ][   http://dyne.org   ][  GnuPG _key__id_
EDEE F1B9 DC92 76C0 6D46  D77A 58B0 82D6 (5B6E 6D97)


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