Source to src/i_sound.c

// Emacs style mode select   -*- C++ -*- 
//-----------------------------------------------------------------------------
//
// $Id:$
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program 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.  See the
// GNU General Public License for more details.
//
// $Log:$
//
// DESCRIPTION:
//	System interface for sound.
//
//-----------------------------------------------------------------------------

static const char
rcsid[] = "$Id: i_unix.c,v 1.5 1997/02/03 22:45:10 b1 Exp $";

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>

#include <math.h>

#include <sys/time.h>
#include <sys/types.h>

#ifndef LINUX
//#include <sys/filio.h>
#endif

#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>

// Linux voxware output.
//#include <linux/soundcard.h>

// Timer stuff. Experimental.
#include <time.h>
#include <signal.h>

#include "z_zone.h"

#include "i_system.h"
#include "i_sound.h"
#include "m_argv.h"
#include "m_misc.h"
#include "w_wad.h"

#include "doomdef.h"

#define SAMPLECOUNT 512
int lengths[NUMSFX];

//
// This function loads the sound data from the WAD lump,
//  for single sound.
//
void*
getsfx
( char*         sfxname,
  int*          len )
{
    unsigned char*      sfx;
    unsigned char*      paddedsfx;
    int                 i;
    int                 size;
    int                 paddedsize;
    char                name[20];
    int                 sfxlump;

    
    // Get the sound data from the WAD, allocate lump
    //  in zone memory.
    sprintf(name, "ds%s", sfxname);

    // Now, there is a severe problem with the
    //  sound handling, in it is not (yet/anymore)
    //  gamemode aware. That means, sounds from
    //  DOOM II will be requested even with DOOM
    //  shareware.
    // The sound list is wired into sounds.c,
    //  which sets the external variable.
    // I do not do runtime patches to that
    //  variable. Instead, we will use a
    //  default sound for replacement.
    if ( W_CheckNumForName(name) == -1 )
      sfxlump = W_GetNumForName("dspistol");
    else
      sfxlump = W_GetNumForName(name);
    
    size = W_LumpLength( sfxlump );

    // Debug.
    // fprintf( stderr, "." );
    //fprintf( stderr, " -loading  %s (lump %d, %d bytes)\n",
    //	     sfxname, sfxlump, size );
    //fflush( stderr );
    
    sfx = (unsigned char*)W_CacheLumpNum( sfxlump, PU_STATIC );

    // Pads the sound effect out to the mixing buffer size.
    // The original realloc would interfere with zone memory.
    paddedsize = ((size-8 + (SAMPLECOUNT-1)) / SAMPLECOUNT) * SAMPLECOUNT;

    // Allocate from zone memory.
    paddedsfx = (unsigned char*)Z_Malloc( paddedsize+8, PU_STATIC, 0 );
    // ddt: (unsigned char *) realloc(sfx, paddedsize+8);
    // This should interfere with zone memory handling,
    //  which does not kick in in the soundserver.

    // Now copy and pad.
    memcpy(  paddedsfx, sfx, size );
    for (i=size ; i<paddedsize+8 ; i++)
        paddedsfx[i] = 128;

    // Remove the cached lump.
    Z_Free( sfx );
    
    // Preserve padded length.
    *len = paddedsize;

    // Return allocated padded data.
    return (void *) (paddedsfx + 8);
}

void I_InitSound()
  {
  int i;

  fprintf( stderr, "I_InitSound: ");
  fprintf(stderr, " configured audio device (well, not really...)\n" );
  for (i=1 ; i<NUMSFX ; i++)
  { 
    // Alias? Example is the chaingun sound linked to pistol.
    if (!S_sfx[i].link)
    {
      // Load data from WAD file.
      S_sfx[i].data = getsfx( S_sfx[i].name, &lengths[i] );
    }	
    else
    {
      // Previously loaded already?
      S_sfx[i].data = S_sfx[i].link->data;
      lengths[i] = lengths[(S_sfx[i].link - S_sfx)/sizeof(sfxinfo_t)];
    }
  }

  fprintf( stderr, " pre-cached all sound data\n");
  
  // Finished initialization.
  fprintf(stderr, "I_InitSound: sound module ready\n");
    
  }
void I_UpdateSound(void) {}
void I_SubmitSound(void) {}
void I_ShutdownSound(void) {}
void I_SetChannels() {}
int I_GetSfxLumpNum (sfxinfo_t* sfx )
  {
  char namebuf[9];
  sprintf(namebuf,"ds%s",sfx->name);
  return W_GetNumForName(namebuf);
  }

int
I_StartSound
( int		id,
  int		vol,
  int		sep,
  int		pitch,
  int		priority ) {return id;}
void I_StopSound(int handle) {}
int I_SoundIsPlaying(int handle) {return gametic<handle; }
void
I_UpdateSoundParams
( int		handle,
  int		vol,
  int		sep,
  int		pitch ) {}
void I_InitMusic(void) {}
void I_ShutdownMusic(void) {}
void I_SetMusicVolume(int volume) {}
void I_PauseSong(int handle) {}
void I_ResumeSong(int handle) {}
int I_RegisterSong(void *data) {return 1;}
void
I_PlaySong
( int		handle,
  int		looping ) {}
void I_StopSong(int handle) {}
void I_UnRegisterSong(int handle) {}