cdparanoia/header.c

   1 /******************************************************************
   2  * CopyPolicy: GNU Public License 3 applies
   3  * Copyright (C) 2008 Monty xiphmont@mit.edu
   4  * and Heiko Eissfeldt heiko@escape.colossus.de
   5  *
   6  * Writes wav and aifc headers
   7  *
   8  ******************************************************************/
   9
  10 #include <unistd.h>
  11 #include <stdlib.h>
  12 #include <stdio.h>
  13 #include <string.h>
  14
  15 static void PutNum(long num,int f,int endianness,int bytes){
  16   int i;
  17   unsigned char c;
  18
  19   if(!endianness)
  20     i=0;
  21   else
  22     i=bytes-1;
  23   while(bytes--){
  24     c=(num>>(i<<3))&0xff;
  25     if(write(f,&c,1)==-1){
  26       perror("Could not write to output.");
  27       exit(1);
  28     }
  29     if(endianness)
  30       i--;
  31     else
  32       i++;
  33   }
  34 }
  35
  36 void WriteWav(int f,long bytes){
  37   /* quick and dirty */
  38
  39   write(f,"RIFF",4);               /*  0-3 */
  40   PutNum(bytes+44-8,f,0,4);        /*  4-7 */
  41   write(f,"WAVEfmt ",8);           /*  8-15 */
  42   PutNum(16,f,0,4);                /* 16-19 */
  43   PutNum(1,f,0,2);                 /* 20-21 */
  44   PutNum(2,f,0,2);                 /* 22-23 */
  45   PutNum(44100,f,0,4);             /* 24-27 */
  46   PutNum(44100*2*2,f,0,4);         /* 28-31 */
  47   PutNum(4,f,0,2);                 /* 32-33 */
  48   PutNum(16,f,0,2);                /* 34-35 */
  49   write(f,"data",4);               /* 36-39 */
  50   PutNum(bytes,f,0,4);             /* 40-43 */
  51 }
  52
  53 void WriteAiff(int f,long bytes){
  54   long size=bytes+54;
  55   long frames=bytes/4;
  56
  57   /* Again, quick and dirty */
  58
  59   write(f,"FORM",4);             /*  4 */
  60   PutNum(size-8,f,1,4);          /*  8 */
  61   write(f,"AIFF",4);             /* 12 */
  62
  63   write(f,"COMM",4);             /* 16 */
  64   PutNum(18,f,1,4);              /* 20 */
  65   PutNum(2,f,1,2);               /* 22 */
  66   PutNum(frames,f,1,4);          /* 26 */
  67   PutNum(16,f,1,2);              /* 28 */
  68   write(f,"@\016\254D\0\0\0\0\0\0",10); /* 38 (44.100 as a float) */
  69
  70   write(f,"SSND",4);             /* 42 */
  71   PutNum(bytes+8,f,1,4);         /* 46 */
  72   PutNum(0,f,1,4);               /* 50 */
  73   PutNum(0,f,1,4);               /* 54 */
  74
  75 }
  76
  77 void WriteAifc(int f,long bytes){
  78   long size=bytes+86;
  79   long frames=bytes/4;
  80
  81   /* Again, quick and dirty */
  82
  83   write(f,"FORM",4);             /*  4 */
  84   PutNum(size-8,f,1,4);          /*  8 */
  85   write(f,"AIFC",4);             /* 12 */
  86   write(f,"FVER",4);             /* 16 */
  87   PutNum(4,f,1,4);               /* 20 */
  88   PutNum(2726318400UL,f,1,4);    /* 24 */
  89
  90   write(f,"COMM",4);             /* 28 */
  91   PutNum(38,f,1,4);              /* 32 */
  92   PutNum(2,f,1,2);               /* 34 */
  93   PutNum(frames,f,1,4);          /* 38 */
  94   PutNum(16,f,1,2);              /* 40 */
  95   write(f,"@\016\254D\0\0\0\0\0\0",10); /* 50 (44.100 as a float) */
  96
  97   write(f,"NONE",4);             /* 54 */
  98   PutNum(14,f,1,1);              /* 55 */
  99   write(f,"not compressed",14);  /* 69 */
 100   PutNum(0,f,1,1);               /* 70 */
 101
 102   write(f,"SSND",4);             /* 74 */
 103   PutNum(bytes+8,f,1,4);         /* 78 */
 104   PutNum(0,f,1,4);               /* 82 */
 105   PutNum(0,f,1,4);               /* 86 */
 106
 107 }
 108