ref: 112bc3fcab6654c20bc980a04d377b5b03044067
dir: /src/heretic/s_sound.c/
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 1993-2008 Raven Software
// Copyright(C) 2008 Simon Howard
//
// 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.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
//-----------------------------------------------------------------------------
#include <stdlib.h>
#include "doomdef.h"
#include "i_system.h"
#include "m_random.h"
#include "sounds.h"
#include "s_sound.h"
#include "i_sound.h"
#include "r_local.h"
#include "p_local.h"
#include "sounds.h"
#include "w_wad.h"
#include "z_zone.h"
/*
===============================================================================
MUSIC & SFX API
===============================================================================
*/
void S_ShutDown(void);
boolean S_StopSoundID(int sound_id, int priority);
static channel_t channel[MAX_CHANNELS];
static void *rs; // Handle for the registered song
int mus_song = -1;
int mus_lumpnum;
void *mus_sndptr;
byte *soundCurve;
int snd_MaxVolume = 10;
int snd_MusicVolume = 10;
int snd_Channels = 16;
int AmbChan;
void S_Start(void)
{
int i;
S_StartSong((gameepisode - 1) * 9 + gamemap - 1, true);
//stop all sounds
for (i = 0; i < snd_Channels; i++)
{
if (channel[i].handle)
{
S_StopSound(channel[i].mo);
}
}
memset(channel, 0, 8 * sizeof(channel_t));
}
void S_StartSong(int song, boolean loop)
{
int mus_len;
if (song == mus_song)
{ // don't replay an old song
return;
}
if (rs != NULL)
{
I_StopSong();
I_UnRegisterSong(rs);
}
if (song < mus_e1m1 || song > NUMMUSIC)
{
return;
}
mus_lumpnum = W_GetNumForName(S_music[song].name);
mus_sndptr = W_CacheLumpNum(mus_lumpnum, PU_MUSIC);
mus_len = W_LumpLength(mus_lumpnum);
rs = I_RegisterSong(mus_sndptr, mus_len);
I_PlaySong(rs, loop); //'true' denotes endless looping.
mus_song = song;
}
static mobj_t *GetSoundListener(void)
{
static degenmobj_t dummy_listener;
// If we are at the title screen, the console player doesn't have an
// object yet, so return a pointer to a static dummy listener instead.
if (players[consoleplayer].mo != NULL)
{
return players[consoleplayer].mo;
}
else
{
dummy_listener.x = 0;
dummy_listener.y = 0;
dummy_listener.z = 0;
return (mobj_t *) &dummy_listener;
}
}
void S_StartSound(void *_origin, int sound_id)
{
mobj_t *origin = _origin;
mobj_t *listener;
int dist, vol;
int i;
int priority;
int sep;
int angle;
int absx;
int absy;
static int sndcount = 0;
int chan;
listener = GetSoundListener();
if (sound_id == 0 || snd_MaxVolume == 0)
return;
if (origin == NULL)
{
origin = listener;
}
// calculate the distance before other stuff so that we can throw out
// sounds that are beyond the hearing range.
absx = abs(origin->x - listener->x);
absy = abs(origin->y - listener->y);
dist = absx + absy - (absx > absy ? absy >> 1 : absx >> 1);
dist >>= FRACBITS;
// dist = P_AproxDistance(origin->x-viewx, origin->y-viewy)>>FRACBITS;
if (dist >= MAX_SND_DIST)
{
// dist = MAX_SND_DIST - 1;
return; //sound is beyond the hearing range...
}
if (dist < 0)
{
dist = 0;
}
priority = S_sfx[sound_id].priority;
priority *= (10 - (dist / 160));
if (!S_StopSoundID(sound_id, priority))
{
return; // other sounds have greater priority
}
for (i = 0; i < snd_Channels; i++)
{
if (origin->player)
{
i = snd_Channels;
break; // let the player have more than one sound.
}
if (origin == channel[i].mo)
{ // only allow other mobjs one sound
S_StopSound(channel[i].mo);
break;
}
}
if (i >= snd_Channels)
{
if (sound_id >= sfx_wind)
{
if (AmbChan != -1 && S_sfx[sound_id].priority <=
S_sfx[channel[AmbChan].sound_id].priority)
{
return; //ambient channel already in use
}
else
{
AmbChan = -1;
}
}
for (i = 0; i < snd_Channels; i++)
{
if (channel[i].mo == NULL)
{
break;
}
}
if (i >= snd_Channels)
{
//look for a lower priority sound to replace.
sndcount++;
if (sndcount >= snd_Channels)
{
sndcount = 0;
}
for (chan = 0; chan < snd_Channels; chan++)
{
i = (sndcount + chan) % snd_Channels;
if (priority >= channel[i].priority)
{
chan = -1; //denote that sound should be replaced.
break;
}
}
if (chan != -1)
{
return; //no free channels.
}
else //replace the lower priority sound.
{
if (channel[i].handle)
{
if (I_SoundIsPlaying(channel[i].handle))
{
I_StopSound(channel[i].handle);
}
if (S_sfx[channel[i].sound_id].usefulness > 0)
{
S_sfx[channel[i].sound_id].usefulness--;
}
if (AmbChan == i)
{
AmbChan = -1;
}
}
}
}
}
if (S_sfx[sound_id].lumpnum == 0)
{
S_sfx[sound_id].lumpnum = I_GetSfxLumpNum(&S_sfx[sound_id]);
}
// calculate the volume based upon the distance from the sound origin.
// vol = (snd_MaxVolume*16 + dist*(-snd_MaxVolume*16)/MAX_SND_DIST)>>9;
vol = soundCurve[dist];
if (origin == listener)
{
sep = 128;
}
else
{
angle = R_PointToAngle2(listener->x, listener->y,
origin->x, origin->y);
angle = (angle - viewangle) >> 24;
sep = angle * 2 - 128;
if (sep < 64)
sep = -sep;
if (sep > 192)
sep = 512 - sep;
}
// TODO: Play pitch-shifted sounds as in Vanilla Heretic
channel[i].pitch = (byte) (127 + (M_Random() & 7) - (M_Random() & 7));
channel[i].handle = I_StartSound(&S_sfx[sound_id], i, vol, sep);
channel[i].mo = origin;
channel[i].sound_id = sound_id;
channel[i].priority = priority;
if (sound_id >= sfx_wind)
{
AmbChan = i;
}
if (S_sfx[sound_id].usefulness == -1)
{
S_sfx[sound_id].usefulness = 1;
}
else
{
S_sfx[sound_id].usefulness++;
}
}
void S_StartSoundAtVolume(void *_origin, int sound_id, int volume)
{
mobj_t *origin = _origin;
mobj_t *listener;
int i;
listener = GetSoundListener();
if (sound_id == 0 || snd_MaxVolume == 0)
return;
if (origin == NULL)
{
origin = listener;
}
if (volume == 0)
{
return;
}
volume = (volume * (snd_MaxVolume + 1) * 8) >> 7;
// no priority checking, as ambient sounds would be the LOWEST.
for (i = 0; i < snd_Channels; i++)
{
if (channel[i].mo == NULL)
{
break;
}
}
if (i >= snd_Channels)
{
return;
}
if (S_sfx[sound_id].lumpnum == 0)
{
S_sfx[sound_id].lumpnum = I_GetSfxLumpNum(&S_sfx[sound_id]);
}
// TODO: Pitch shifting.
channel[i].pitch = (byte) (127 - (M_Random() & 3) + (M_Random() & 3));
channel[i].handle = I_StartSound(&S_sfx[sound_id], i, volume, 128);
channel[i].mo = origin;
channel[i].sound_id = sound_id;
channel[i].priority = 1; //super low priority.
if (S_sfx[sound_id].usefulness == -1)
{
S_sfx[sound_id].usefulness = 1;
}
else
{
S_sfx[sound_id].usefulness++;
}
}
boolean S_StopSoundID(int sound_id, int priority)
{
int i;
int lp; //least priority
int found;
if (S_sfx[sound_id].numchannels == -1)
{
return (true);
}
lp = -1; //denote the argument sound_id
found = 0;
for (i = 0; i < snd_Channels; i++)
{
if (channel[i].sound_id == sound_id && channel[i].mo)
{
found++; //found one. Now, should we replace it??
if (priority >= channel[i].priority)
{ // if we're gonna kill one, then this'll be it
lp = i;
priority = channel[i].priority;
}
}
}
if (found < S_sfx[sound_id].numchannels)
{
return (true);
}
else if (lp == -1)
{
return (false); // don't replace any sounds
}
if (channel[lp].handle)
{
if (I_SoundIsPlaying(channel[lp].handle))
{
I_StopSound(channel[lp].handle);
}
if (S_sfx[channel[i].sound_id].usefulness > 0)
{
S_sfx[channel[i].sound_id].usefulness--;
}
channel[lp].mo = NULL;
}
return (true);
}
void S_StopSound(void *_origin)
{
mobj_t *origin = _origin;
int i;
for (i = 0; i < snd_Channels; i++)
{
if (channel[i].mo == origin)
{
I_StopSound(channel[i].handle);
if (S_sfx[channel[i].sound_id].usefulness > 0)
{
S_sfx[channel[i].sound_id].usefulness--;
}
channel[i].handle = 0;
channel[i].mo = NULL;
if (AmbChan == i)
{
AmbChan = -1;
}
}
}
}
void S_SoundLink(mobj_t * oldactor, mobj_t * newactor)
{
int i;
for (i = 0; i < snd_Channels; i++)
{
if (channel[i].mo == oldactor)
channel[i].mo = newactor;
}
}
void S_PauseSound(void)
{
I_PauseSong();
}
void S_ResumeSound(void)
{
I_ResumeSong();
}
void S_UpdateSounds(mobj_t * listener)
{
int i, dist, vol;
int angle;
int sep;
int priority;
int absx;
int absy;
listener = GetSoundListener();
if (snd_MaxVolume == 0)
{
return;
}
for (i = 0; i < snd_Channels; i++)
{
if (!channel[i].handle || S_sfx[channel[i].sound_id].usefulness == -1)
{
continue;
}
if (!I_SoundIsPlaying(channel[i].handle))
{
if (S_sfx[channel[i].sound_id].usefulness > 0)
{
S_sfx[channel[i].sound_id].usefulness--;
}
channel[i].handle = 0;
channel[i].mo = NULL;
channel[i].sound_id = 0;
if (AmbChan == i)
{
AmbChan = -1;
}
}
if (channel[i].mo == NULL || channel[i].sound_id == 0
|| channel[i].mo == listener)
{
continue;
}
else
{
absx = abs(channel[i].mo->x - listener->x);
absy = abs(channel[i].mo->y - listener->y);
dist = absx + absy - (absx > absy ? absy >> 1 : absx >> 1);
dist >>= FRACBITS;
// dist = P_AproxDistance(channel[i].mo->x-listener->x, channel[i].mo->y-listener->y)>>FRACBITS;
if (dist >= MAX_SND_DIST)
{
S_StopSound(channel[i].mo);
continue;
}
if (dist < 0)
dist = 0;
// calculate the volume based upon the distance from the sound origin.
// vol = (*((byte *)W_CacheLumpName("SNDCURVE", PU_CACHE)+dist)*(snd_MaxVolume*8))>>7;
vol = soundCurve[dist];
angle = R_PointToAngle2(listener->x, listener->y,
channel[i].mo->x, channel[i].mo->y);
angle = (angle - viewangle) >> 24;
sep = angle * 2 - 128;
if (sep < 64)
sep = -sep;
if (sep > 192)
sep = 512 - sep;
// TODO: Pitch shifting.
I_UpdateSoundParams(channel[i].handle, vol, sep);
priority = S_sfx[channel[i].sound_id].priority;
priority *= (10 - (dist >> 8));
channel[i].priority = priority;
}
}
}
void S_Init(void)
{
soundCurve = Z_Malloc(MAX_SND_DIST, PU_STATIC, NULL);
I_InitSound(false);
if (snd_Channels > 8)
{
snd_Channels = 8;
}
I_SetMusicVolume(snd_MusicVolume * 8);
S_SetMaxVolume(true);
I_AtExit(S_ShutDown, true);
}
void S_GetChannelInfo(SoundInfo_t * s)
{
int i;
ChanInfo_t *c;
s->channelCount = snd_Channels;
s->musicVolume = snd_MusicVolume;
s->soundVolume = snd_MaxVolume;
for (i = 0; i < snd_Channels; i++)
{
c = &s->chan[i];
c->id = channel[i].sound_id;
c->priority = channel[i].priority;
c->name = S_sfx[c->id].name;
c->mo = channel[i].mo;
if (c->mo != NULL)
{
c->distance = P_AproxDistance(c->mo->x - viewx, c->mo->y - viewy)
>> FRACBITS;
}
else
{
c->distance = 0;
}
}
}
void S_SetMaxVolume(boolean fullprocess)
{
int i;
if (!fullprocess)
{
soundCurve[0] =
(*((byte *) W_CacheLumpName("SNDCURVE", PU_CACHE)) *
(snd_MaxVolume * 8)) >> 7;
}
else
{
for (i = 0; i < MAX_SND_DIST; i++)
{
soundCurve[i] =
(*((byte *) W_CacheLumpName("SNDCURVE", PU_CACHE) + i) *
(snd_MaxVolume * 8)) >> 7;
}
}
}
static boolean musicPaused;
void S_SetMusicVolume(void)
{
I_SetMusicVolume(snd_MusicVolume * 8);
if (snd_MusicVolume == 0)
{
I_PauseSong();
musicPaused = true;
}
else if (musicPaused)
{
musicPaused = false;
I_ResumeSong();
}
}
void S_ShutDown(void)
{
I_StopSong();
I_UnRegisterSong(rs);
I_ShutdownSound();
}