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// Emacs style mode select   -*- C++ -*-

//-----------------------------------------------------------------------------

//

// $Id:$

//

// Copyright (C) 1993-1996 by id Software, Inc.

//

// This source is available for distribution and/or modification

// only under the terms of the DOOM Source Code License as

// published by id Software. All rights reserved.

//

// The source is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License

// for more details.

//

// $Log:$

//

// DESCRIPTION:  none

//

//-----------------------------------------------------------------------------

static const char

rcsid[] = "$Id: s_sound.c,v 1.6 1997/02/03 22:45:12 b1 Exp $";

#include 

#include 

#include "i_system.h"

#include "i_sound.h"

#include "sounds.h"

#include "s_sound.h"

#include "z_zone.h"

#include "m_random.h"

#include "w_wad.h"

#include "doomdef.h"

#include "p_local.h"

//#include "m_music.h"

#include "doomstat.h"

//#include "qmus2mid.h"

void WriteDebug(char *);

// Purpose?

const char snd_prefixen[]

= { 'P', 'P', 'A', 'S', 'S', 'S', 'M', 'M', 'M', 'S', 'S', 'S' };

#define S_MAX_VOLUME            127

// when to clip out sounds

// Does not fit the large outdoor areas.

#define S_CLIPPING_DIST         (1200*0x10000)

// Distance tp origin when sounds should be maxed out.

// This should relate to movement clipping resolution

// (see BLOCKMAP handling).

// Originally: (200*0x10000).

#define S_CLOSE_DIST            (160*0x10000)

#define S_ATTENUATOR            ((S_CLIPPING_DIST-S_CLOSE_DIST)>>FRACBITS)

// Adjustable by menu.

#define NORM_VOLUME             snd_MaxVolume

#define NORM_PITCH              128

#define NORM_PRIORITY           64

#define NORM_SEP                128

#define S_PITCH_PERTURB         1

#define S_STEREO_SWING          (96*0x10000)

// percent attenuation from front to back

#define S_IFRACVOL              30

#define NA                      0

//#define S_NUMCHANNELS         2

#define NUM_CHANNELS    16

// Current music/sfx card - index useless

//  w/o a reference LUT in a sound module.

extern int snd_MusicDevice;

extern int snd_SfxDevice;

// Config file? Same disclaimer as above.

extern int snd_DesiredMusicDevice;

extern int snd_DesiredSfxDevice;

typedef struct

{

    // sound information (if null, channel avail.)

    sfxinfo_t*  sfxinfo;

    // origin of sound

    void*       origin;

    // handle of the sound being played

    int         handle;

} channel_t;

// the set of channels available

static channel_t*       channels;

// These are not used, but should be (menu).

// Maximum volume of a sound effect.

// Internal default is max out of 0-15.

int             snd_SfxVolume = 80;

// Maximum volume of music. Useless so far.

int             snd_MusicVolume = 80;

// whether songs are mus_paused

static boolean          mus_paused;

// music currently being played

static musicinfo_t*     mus_playing=0;

// following is set

//  by the defaults code in M_misc:

// number of channels available

int                     numChannels;

static int              nextcleanup;

//

// Internals.

//

int

S_getChannel

( void*         origin,

  sfxinfo_t*    sfxinfo,

  int       sfxid );

int

S_AdjustSoundParams

( mobj_t*       listener,

  mobj_t*       source,

  int*          vol,

  int*          sep,

  int*          pitch );

void S_StopChannel(int cnum);

//

// Initializes sound stuff, including volume

// Sets channels, SFX and music volume,

//  allocates channel buffer, sets S_sfx lookup.

//

void S_Init

( int           sfxVolume,

  int           musicVolume )

{

  int           i;

  printf("S_Init: default sfx volume %d\n", sfxVolume);

  //I_CreateSound();

  numChannels = NUM_CHANNELS;

  // Whatever these did with DMX, these are rather dummies now.

  I_SetChannels();

  S_SetSfxVolume(sfxVolume);

  // No music with Linux - another dummy.

  S_SetMusicVolume(musicVolume);

  // Allocating the internal channels for mixing

  // (the maximum numer of sounds rendered

  // simultaneously) within zone memory.

  channels =

    (channel_t *) Z_Malloc(numChannels*sizeof(channel_t), PU_STATIC, 0);

  // Free all channels for use

  for (i=0 ; i

    channels[i].sfxinfo = 0;

  // no sounds are playing, and they are not mus_paused

  mus_paused = 0;

  // Note that sounds have not been cached (yet).

  for (i=1 ; i

    S_sfx[i].lumpnum = S_sfx[i].usefulness = -1;

}

//

// Per level startup code.

// Kills playing sounds at start of level,

//  determines music if any, changes music.

//

void S_Start(void)

{

  int cnum;

  int mnum;

  // kill all playing sounds at start of level

  //  (trust me - a good idea)

  for (cnum=0 ; cnum

    if (channels[cnum].sfxinfo)

      S_StopChannel(cnum);

  // start new music for the level

  mus_paused = 0;

  if (gamemode == commercial)

          mnum = mus_runnin + gamemap - 1;

  else

  {

          int spmus[]=

          {

                  // Song - Who? - Where?

                mus_e3m4,       // American     e4m1

                mus_e3m2,       // Romero       e4m2

                mus_e3m3,       // Shawn        e4m3

                mus_e1m5,       // American     e4m4

                mus_e2m7,       // Tim  e4m5

                mus_e2m4,       // Romero       e4m6

                mus_e2m6,       // J.Anderson   e4m7 CHIRON.WAD

                mus_e2m5,       // Shawn        e4m8

                mus_e1m9        // Tim          e4m9

          };

          if (gameepisode < 4)

                  mnum = mus_e1m1 + (gameepisode-1)*9 + gamemap-1;

          else

                  mnum = spmus[gamemap-1];

  }

  // HACK FOR COMMERCIAL

  //  if (commercial && mnum > mus_e3m9)

  //      mnum -= mus_e3m9;

  S_ChangeMusic(mnum, true);

  nextcleanup = 15;

}

void S_StartSoundAtVolume( void *origin_p, int sfx_id, int volume )

   {

    int        rc;

    int        sep;

    int        pitch;

    int        priority;

    sfxinfo_t *sfx;

    int        cnum;

    // int        chnum;  <-- 10.9.98 compiler warning

    mobj_t*     origin = (mobj_t *)origin_p;

    //WriteDebug("S_StartSoundAtVolume...\n");

    // Debug.

    /*fprintf( stderr,"S_StartSoundAtVolume: playing sound %d (%s)\n",sfx_id, S_sfx[sfx_id].name );*/

    // check for bogus sound #

    if (sfx_id < 1 || sfx_id > NUMSFX)

        I_Error("Bad sfx #: %d", sfx_id);

    sfx = &S_sfx[sfx_id];

    // Initialize sound parameters

    if (sfx->link)

       {

        pitch = sfx->pitch;

        priority = sfx->priority;

        volume += sfx->volume;

        if (volume < 1)

           {

            //WriteDebug("Volume off...\n");

            return;

           }

        if (volume > snd_SfxVolume)

            volume = snd_SfxVolume;

       }

    else

       {

        pitch = NORM_PITCH;

        priority = NORM_PRIORITY;

       }

    // Check to see if it is audible,

    //  and if not, modify the params

    if (origin && origin != players[consoleplayer].mo)

       {

        rc = S_AdjustSoundParams(players[consoleplayer].mo, origin, &volume, &sep, &pitch);

        if ( origin->x == players[consoleplayer].mo->x && origin->y == players[consoleplayer].mo->y)

           {

            sep = NORM_SEP;

           }

        if (!rc)

           {

            //WriteDebug("No rc from S_AdjustSoundParams...\n");

            return;

           }

       }

    else

       {

        sep = NORM_SEP;

       }

    // hacks to vary the sfx pitches

    if (sfx_id >= sfx_sawup && sfx_id <= sfx_sawhit)

       {

        pitch += 8 - (M_Random()&15);

        if (pitch < 0)

            pitch = 0;

        else

        if (pitch>255)

            pitch = 255;

       }

    else

    if (sfx_id != sfx_itemup && sfx_id != sfx_tink)

       {

        pitch += 16 - (M_Random()&31);

        if (pitch<0)

            pitch = 0;

        else

        if (pitch > 255)

            pitch = 255;

       }

  // kill old sound

  S_StopSound(origin);

  // try to find a channel

  cnum = S_getChannel(origin, sfx, sfx_id);

  if (cnum<0)

     {

        //WriteDebug("cnum < 0 -- no channel...\n");

    return;

     }

  //

  // This is supposed to handle the loading/caching.

  // For some odd reason, the caching is done nearly

  //  each time the sound is needed?

  //

  // get lumpnum if necessary

  if (sfx->lumpnum < 0)

    sfx->lumpnum = I_GetSfxLumpNum(sfx);

  // cache data if necessary

  if (!sfx->data)

  {

    sfx->data = (void *) W_CacheLumpNum(sfx->lumpnum, PU_MUSIC);

  }

  // increase the usefulness

  if (sfx->usefulness++ < 0)

      sfx->usefulness = 1;

  // Assigns the handle to one of the channels in the

  //  mix/output buffer.

  //WriteDebug("I_StartSound...\n");

  channels[cnum].handle = I_StartSound(sfx_id,volume,sep,pitch,priority);

  channels[cnum].handle = cnum;

  channels[cnum].sfxinfo = sfx;

  channels[cnum].origin = origin;

}

void S_StartSound( void *origin, int sfx_id )

   {

#ifdef SAWDEBUG

    // if (sfx_id == sfx_sawful)

    // sfx_id = sfx_itemup;

#endif

    S_StartSoundAtVolume(origin, sfx_id, snd_SfxVolume);

    // UNUSED. We had problems, had we not?

#ifdef SAWDEBUG

{

    int i;

    int n;

    static mobj_t*      last_saw_origins[10] = {1,1,1,1,1,1,1,1,1,1};

    static int          first_saw=0;

    static int          next_saw=0;

    if (sfx_id == sfx_sawidl

        || sfx_id == sfx_sawful

        || sfx_id == sfx_sawhit)

    {

        for (i=first_saw;i!=next_saw;i=(i+1)%10)

            if (last_saw_origins[i] != origin)

                fprintf(stderr, "old origin 0x%lx != "

                        "origin 0x%lx for sfx %d\n",

                        last_saw_origins[i],

                        origin,

                        sfx_id);

        last_saw_origins[next_saw] = origin;

        next_saw = (next_saw + 1) % 10;

        if (next_saw == first_saw)

            first_saw = (first_saw + 1) % 10;

        for (n=i=0; i

        {

            if (channels[i].sfxinfo == &S_sfx[sfx_sawidl]

                || channels[i].sfxinfo == &S_sfx[sfx_sawful]

                || channels[i].sfxinfo == &S_sfx[sfx_sawhit]) n++;

        }

        if (n>1)

        {

            for (i=0; i

            {

                if (channels[i].sfxinfo == &S_sfx[sfx_sawidl]

                    || channels[i].sfxinfo == &S_sfx[sfx_sawful]

                    || channels[i].sfxinfo == &S_sfx[sfx_sawhit])

                {

                    fprintf(stderr,

                            "chn: sfxinfo=0x%lx, origin=0x%lx, "

                            "handle=%d\n",

                            channels[i].sfxinfo,

                            channels[i].origin,

                            channels[i].handle);

                }

            }

            fprintf(stderr, "\n");

        }

    }

}

#endif

}

void S_StopSound(void *origin)

{

    int cnum;

    for (cnum=0 ; cnum

    {

        if (channels[cnum].sfxinfo && channels[cnum].origin == origin)

        {

            S_StopChannel(cnum);

            break;

        }

    }

}

//

// Stop and resume music, during game PAUSE.

//

void S_PauseSound(void)

{

    if (mus_playing && !mus_paused)

    {

        I_PauseSong(mus_playing->handle);

        mus_paused = true;

    }

}

void S_ResumeSound(void)

{

    if (mus_playing && mus_paused)

    {

        I_ResumeSong(mus_playing->handle);

        mus_paused = false;

    }

}

//

// Updates music & sounds

//

void S_UpdateSounds(void* listener_p)

{

    int         audible;

    int         cnum;

    int         volume;

    int         sep;

    int         pitch;

    sfxinfo_t*  sfx;

    channel_t*  c;

    mobj_t*     listener = (mobj_t*)listener_p;

    // Clean up unused data.

    // This is currently not done for 16bit (sounds cached static).

    // DOS 8bit remains.

    /*if (gametic > nextcleanup)

    {

        for (i=1 ; i

        {

            if (S_sfx[i].usefulness < 1

                && S_sfx[i].usefulness > -1)

            {

                if (--S_sfx[i].usefulness == -1)

                {

                    Z_ChangeTag(S_sfx[i].data, PU_CACHE);

                    S_sfx[i].data = 0;

                }

            }

        }

        nextcleanup = gametic + 15;

    }*/

    for (cnum=0 ; cnum

    {

        c = &channels[cnum];

        sfx = c->sfxinfo;

        if (c->sfxinfo)

        {

            if (I_SoundIsPlaying(c->handle))

            {

                // initialize parameters

                volume = snd_SfxVolume;

                pitch = NORM_PITCH;

                sep = NORM_SEP;

                if (sfx->link)

                {

                    pitch = sfx->pitch;

                    volume += sfx->volume;

                    if (volume < 1)

                    {

                        S_StopChannel(cnum);

                        continue;

                    }

                    else if (volume > snd_SfxVolume)

                    {

                        volume = snd_SfxVolume;

                    }

                }

                // check non-local sounds for distance clipping

                //  or modify their params

                if (c->origin && listener_p != c->origin)

                {

                    audible = S_AdjustSoundParams(listener,

                                                  c->origin,

                                                  &volume,

                                                  &sep,

                                                  &pitch);

                    if (!audible)

                    {

                        S_StopChannel(cnum);

                    }

                    else

                        I_UpdateSoundParams(c->handle, volume, sep, pitch);

                }

            }

            else

            {

                // if channel is allocated but sound has stopped,

                //  free it

                S_StopChannel(cnum);

            }

        }

    }

    // kill music if it is a single-play && finished

    // if (     mus_playing

    //      && !I_QrySongPlaying(mus_playing->handle)

    //      && !mus_paused )

    // S_StopMusic();

}

void S_SetMusicVolume(int volume)

{

    if (volume < 0 || volume > 127)

    {

        I_Error("Attempt to set music volume at %d",

                volume);

    }

    I_SetMusicVolume(127);

    I_SetMusicVolume(volume);

    snd_MusicVolume = volume;

}

void S_SetSfxVolume(int volume)

{

    if (volume < 0 || volume > 127)

        I_Error("Attempt to set sfx volume at %d", volume);

    snd_SfxVolume = volume;

}

//

// Starts some music with the music id found in sounds.h.

//

void S_StartMusic(int m_id)

{

//    S_ChangeMusic(m_id, false);

}

// clean-up&code for orig midi 10.9.98-dlw

void S_ChangeMusic(int musicnum, int looping)

{

    // I_PlaySong(music->handle, looping);

//      mus_playing = music;

}

void S_StopMusic(void)

{

    if (mus_playing)

    {

                if (mus_paused) I_ResumeSong(mus_playing->handle);

                I_StopSong(mus_playing->handle);

                I_UnRegisterSong(mus_playing->handle);

                Z_ChangeTag(mus_playing->data, PU_CACHE);

                mus_playing->data = 0;

                mus_playing = 0;

    }

}

void S_StopChannel(int cnum)

{

    int         i;

    channel_t*  c = &channels[cnum];

    if (c->sfxinfo)

    {

        // stop the sound playing

        if (I_SoundIsPlaying(c->handle))

        {

#ifdef SAWDEBUG

            if (c->sfxinfo == &S_sfx[sfx_sawful])

                fprintf(stderr, "stopped\n");

#endif

            I_StopSound(c->handle);

        }

        // check to see

        //  if other channels are playing the sound

        for (i=0 ; i

        {

            if (cnum != i

                && c->sfxinfo == channels[i].sfxinfo)

            {

                break;

            }

        }

        // degrade usefulness of sound data

        c->sfxinfo->usefulness--;

        c->sfxinfo = 0;

    }

}

//

// Changes volume, stereo-separation, and pitch variables

//  from the norm of a sound effect to be played.

// If the sound is not audible, returns a 0.

// Otherwise, modifies parameters and returns 1.

//

int

S_AdjustSoundParams (mobj_t* listener, mobj_t* source,

                     int* vol, int* sep, int* pitch)

{

    fixed_t     approx_dist;

    fixed_t     adx;

    fixed_t     ady;

    angle_t     angle;

    // calculate the distance to sound origin

    //  and clip it if necessary

    adx = abs(listener->x - source->x);

    ady = abs(listener->y - source->y);

    // From _GG1_ p.428. Appox. eucledian distance fast.

    approx_dist = adx + ady - ((adx < ady ? adx : ady)>>1);

    if (gamemap != 8

        && approx_dist > S_CLIPPING_DIST)

    {

        return 0;

    }

    // angle of source to listener

    angle = R_PointToAngle2(listener->x,

                            listener->y,

                            source->x,

                            source->y);

    if (angle > listener->angle)

        angle = angle - listener->angle;

    else

        angle = angle + (0xffffffff - listener->angle);

    angle >>= ANGLETOFINESHIFT;

    // stereo separation

    *sep = 128 - (FixedMul(S_STEREO_SWING,finesine[angle])>>FRACBITS);

    // volume calculation

    if (approx_dist < S_CLOSE_DIST)

    {

        *vol = snd_SfxVolume;

    }

    else if (gamemap == 8)

    {

        if (approx_dist > S_CLIPPING_DIST)

            approx_dist = S_CLIPPING_DIST;

        *vol = 15+ ((snd_SfxVolume-15)

                    *((S_CLIPPING_DIST - approx_dist)>>FRACBITS))

            / S_ATTENUATOR;

    }

    else

    {

        // distance effect

        *vol = (snd_SfxVolume

                * ((S_CLIPPING_DIST - approx_dist)>>FRACBITS))

            / S_ATTENUATOR;

    }

    return (*vol > 0);

}

//

// S_getChannel :

//   If none available, return -1.  Otherwise channel #.

//

int S_getChannel( void *origin, sfxinfo_t *sfxinfo, int sfxid )

   {

    // channel number to use

    int         cnum;

    channel_t*  c;

    // Find an open channel

    //for (cnum = 0; cnum < numChannels; cnum++)

    for (cnum = 0; cnum < NUM_CHANNELS; cnum++)

       {

        if (!channels[cnum].sfxinfo)

            break;

        else

        if (origin && channels[cnum].origin == origin)

           {

            S_StopChannel(cnum);

            break;

           }

       }

    // None available

    if (cnum == NUM_CHANNELS)

       {

        // Look for lower priority

        for (cnum = NUMSFX; cnum < NUM_CHANNELS; cnum++)

             if (channels[cnum].sfxinfo->priority >= sfxinfo->priority)

                 break;

        if (cnum == numChannels)

           {

            // FUCK!  No lower priority.  Sorry, Charlie.

            return -1;

           }

        else

           {

            // Otherwise, kick out lower priority.

            S_StopChannel(cnum);

           }

       }

    c = &channels[cnum];

    // channel is decided to be cnum.

    c->sfxinfo = sfxinfo;

    c->origin = origin;

    return cnum;

   }