/
s_sound.cpp
1675 lines (1479 loc) · 41.3 KB
/
s_sound.cpp
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/*
** s_sound.cpp
** Main sound engine
**
**---------------------------------------------------------------------------
** Copyright 1998-2016 Randy Heit
** Copyright 2002-2019 Christoph Oelckers
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/
#include <stdio.h>
#include <stdlib.h>
#ifdef _WIN32
#include <io.h>
#endif
#include "s_soundinternal.h"
#include "m_swap.h"
#include "superfasthash.h"
enum
{
DEFAULT_PITCH = 128,
};
SoundEngine* soundEngine;
int sfx_empty = -1;
//==========================================================================
//
// S_Init
//
//==========================================================================
void SoundEngine::Init(TArray<uint8_t> &curve)
{
// Free all channels for use.
while (Channels != NULL)
{
ReturnChannel(Channels);
}
S_SoundCurve = std::move(curve);
}
//==========================================================================
//
// SoundEngine::Clear
//
//==========================================================================
void SoundEngine::Clear()
{
StopAllChannels();
UnloadAllSounds();
GetSounds().Clear();
ClearRandoms();
}
//==========================================================================
//
// S_Shutdown
//
//==========================================================================
void SoundEngine::Shutdown ()
{
FSoundChan *chan, *next;
StopAllChannels();
for (chan = FreeChannels; chan != NULL; chan = next)
{
next = chan->NextChan;
delete chan;
}
FreeChannels = NULL;
}
//==========================================================================
//
// MarkUsed
//
//==========================================================================
void SoundEngine::MarkUsed(int id)
{
if ((unsigned)id < S_sfx.Size())
{
S_sfx[id].bUsed = true;
}
}
//==========================================================================
//
// Cache all marked sounds
//
//==========================================================================
void SoundEngine::CacheMarkedSounds()
{
// Don't unload sounds that are playing right now.
for (FSoundChan* chan = Channels; chan != nullptr; chan = chan->NextChan)
{
MarkUsed(chan->SoundID);
}
for (unsigned i = 1; i < S_sfx.Size(); ++i)
{
if (S_sfx[i].bUsed)
{
CacheSound(&S_sfx[i]);
}
}
for (unsigned i = 1; i < S_sfx.Size(); ++i)
{
if (!S_sfx[i].bUsed && S_sfx[i].link == sfxinfo_t::NO_LINK)
{
UnloadSound(&S_sfx[i]);
}
}
}
//==========================================================================
//
// S_CacheSound
//
//==========================================================================
void SoundEngine::CacheSound (sfxinfo_t *sfx)
{
if (GSnd)
{
if (sfx->bPlayerReserve)
{
return;
}
sfxinfo_t *orig = sfx;
while (!sfx->bRandomHeader && sfx->link != sfxinfo_t::NO_LINK)
{
sfx = &S_sfx[sfx->link];
}
if (sfx->bRandomHeader)
{
CacheRandomSound(sfx);
}
else
{
// Since we do not know in what format the sound will be used, we have to cache both.
FSoundLoadBuffer SoundBuffer;
LoadSound(sfx, &SoundBuffer);
LoadSound3D(sfx, &SoundBuffer);
sfx->bUsed = true;
}
}
}
//==========================================================================
//
// S_UnloadSound
//
//==========================================================================
void SoundEngine::UnloadSound (sfxinfo_t *sfx)
{
if (sfx->data3d.isValid() && sfx->data != sfx->data3d)
GSnd->UnloadSound(sfx->data3d);
if (sfx->data.isValid())
GSnd->UnloadSound(sfx->data);
sfx->data.Clear();
sfx->data3d.Clear();
}
//==========================================================================
//
// S_GetChannel
//
// Returns a free channel for the system sound interface.
//
//==========================================================================
FSoundChan *SoundEngine::GetChannel(void *syschan)
{
FSoundChan *chan;
if (FreeChannels != NULL)
{
chan = FreeChannels;
UnlinkChannel(chan);
}
else
{
chan = new FSoundChan;
memset(chan, 0, sizeof(*chan));
}
LinkChannel(chan, &Channels);
chan->SysChannel = syschan;
return chan;
}
//==========================================================================
//
// S_ReturnChannel
//
// Returns a channel to the free pool.
//
//==========================================================================
void SoundEngine::ReturnChannel(FSoundChan *chan)
{
UnlinkChannel(chan);
memset(chan, 0, sizeof(*chan));
LinkChannel(chan, &FreeChannels);
}
//==========================================================================
//
// S_UnlinkChannel
//
//==========================================================================
void SoundEngine::UnlinkChannel(FSoundChan *chan)
{
*(chan->PrevChan) = chan->NextChan;
if (chan->NextChan != NULL)
{
chan->NextChan->PrevChan = chan->PrevChan;
}
}
//==========================================================================
//
// S_LinkChannel
//
//==========================================================================
void SoundEngine::LinkChannel(FSoundChan *chan, FSoundChan **head)
{
chan->NextChan = *head;
if (chan->NextChan != NULL)
{
chan->NextChan->PrevChan = &chan->NextChan;
}
*head = chan;
chan->PrevChan = head;
}
//==========================================================================
//
//
//
//==========================================================================
TArray<FSoundChan*> SoundEngine::AllActiveChannels()
{
TArray<FSoundChan*> chans;
for (auto chan = Channels; chan != nullptr; chan = chan->NextChan)
{
// If the sound is forgettable, this is as good a time as
// any to forget about it. And if it's a UI sound, it shouldn't
// be stored in the savegame.
if (!(chan->ChanFlags & (CHAN_FORGETTABLE | CHAN_UI)))
{
chans.Push(chan);
}
}
return chans;
}
//==========================================================================
//
//
//
//==========================================================================
FString SoundEngine::ListSoundChannels()
{
FString output;
FSoundChan* chan;
int count = 0;
for (chan = Channels; chan != nullptr; chan = chan->NextChan)
{
if (!(chan->ChanFlags & CHAN_EVICTED))
{
FVector3 chanorigin;
CalcPosVel(chan, &chanorigin, nullptr);
output.AppendFormat("%s at (%1.5f, %1.5f, %1.5f)\n", (const char*)S_sfx[chan->SoundID].name.GetChars(), chanorigin.X, chanorigin.Y, chanorigin.Z);
count++;
}
}
output.AppendFormat("%d sounds playing\n", count);
return output;
}
// [RH] Split S_StartSoundAtVolume into multiple parts so that sounds can
// be specified both by id and by name. Also borrowed some stuff from
// Hexen and parameters from Quake.
//==========================================================================
//
// CalcPosVel
//
// Retrieves a sound's position and velocity for 3D sounds. This version
// is for an already playing sound.
//
//=========================================================================
void SoundEngine::CalcPosVel(FSoundChan *chan, FVector3 *pos, FVector3 *vel)
{
CalcPosVel(chan->SourceType, chan->Source, chan->Point,
chan->EntChannel, chan->ChanFlags, pos, vel);
}
bool SoundEngine::ValidatePosVel(const FSoundChan* const chan, const FVector3& pos, const FVector3& vel)
{
return ValidatePosVel(chan->SourceType, chan->Source, pos, vel);
}
//==========================================================================
//
// S_StartSound
//
// 0 attenuation means full volume over whole primaryLevel->
// 0 < attenuation means to scale the distance by that amount when
// calculating volume.
//
//==========================================================================
FSoundChan *SoundEngine::StartSound(int type, const void *source,
const FVector3 *pt, int channel, FSoundID sound_id, float volume, float attenuation,
FRolloffInfo *forcedrolloff, float spitch)
{
sfxinfo_t *sfx;
int chanflags;
int basepriority;
int org_id;
int pitch;
FSoundChan *chan;
FVector3 pos, vel;
FRolloffInfo *rolloff;
FSoundLoadBuffer SoundBuffer;
if (sound_id <= 0 || volume <= 0 || nosfx || nosound )
return NULL;
// prevent crashes.
if (type == SOURCE_Unattached && pt == nullptr) type = SOURCE_None;
org_id = sound_id;
chanflags = channel & ~7;
channel &= 7;
CalcPosVel(type, source, &pt->X, channel, chanflags, &pos, &vel);
if (!ValidatePosVel(type, source, pos, vel))
{
return nullptr;
}
sfx = &S_sfx[sound_id];
// Scale volume according to SNDINFO data.
volume = std::min(volume * sfx->Volume, 1.f);
if (volume <= 0)
return NULL;
// When resolving a link we do not want to get the NearLimit of
// the referenced sound so some additional checks are required
int near_limit = sfx->NearLimit;
float limit_range = sfx->LimitRange;
auto pitchmask = sfx->PitchMask;
rolloff = &sfx->Rolloff;
// Resolve player sounds, random sounds, and aliases
while (sfx->link != sfxinfo_t::NO_LINK)
{
if (sfx->bRandomHeader)
{
// Random sounds attenuate based on the original (random) sound as well as the chosen one.
attenuation *= sfx->Attenuation;
sound_id = FSoundID(PickReplacement (sound_id));
if (near_limit < 0)
{
near_limit = S_sfx[sound_id].NearLimit;
limit_range = S_sfx[sound_id].LimitRange;
}
if (rolloff->MinDistance == 0)
{
rolloff = &S_sfx[sound_id].Rolloff;
}
}
else
{
sound_id = FSoundID(sfx->link);
if (near_limit < 0)
{
near_limit = S_sfx[sound_id].NearLimit;
limit_range = S_sfx[sound_id].LimitRange;
}
if (rolloff->MinDistance == 0)
{
rolloff = &S_sfx[sound_id].Rolloff;
}
}
sfx = &S_sfx[sound_id];
}
// Attenuate the attenuation based on the sound.
attenuation *= sfx->Attenuation;
// The passed rolloff overrides any sound-specific rolloff.
if (forcedrolloff != NULL && forcedrolloff->MinDistance != 0)
{
rolloff = forcedrolloff;
}
// If no valid rolloff was set, use the global default.
if (rolloff->MinDistance == 0)
{
rolloff = &S_Rolloff;
}
// If this is a singular sound, don't play it if it's already playing.
if (sfx->bSingular && CheckSingular(sound_id))
{
chanflags |= CHAN_EVICTED;
}
// If the sound is unpositioned or comes from the listener, it is
// never limited.
if (type == SOURCE_None || source == listener.ListenerObject)
{
near_limit = 0;
}
// If this sound doesn't like playing near itself, don't play it if
// that's what would happen. (Does this really need the SOURCE_Actor restriction?)
if (near_limit > 0 && CheckSoundLimit(sfx, pos, near_limit, limit_range, type, type == SOURCE_Actor? source : nullptr, channel))
{
chanflags |= CHAN_EVICTED;
}
// If the sound is blocked and not looped, return now. If the sound
// is blocked and looped, pretend to play it so that it can
// eventually play for real.
if ((chanflags & (CHAN_EVICTED | CHAN_LOOP)) == CHAN_EVICTED)
{
return NULL;
}
// Make sure the sound is loaded.
sfx = LoadSound(sfx, &SoundBuffer);
// The empty sound never plays.
if (sfx->lumpnum == sfx_empty)
{
return NULL;
}
// Select priority.
if (type == SOURCE_None || source == listener.ListenerObject)
{
basepriority = 80;
}
else
{
basepriority = 0;
}
int seen = 0;
if (source != NULL && channel == CHAN_AUTO)
{
// Select a channel that isn't already playing something.
// Try channel 0 first, then travel from channel 7 down.
if (!IsChannelUsed(type, source, 0, &seen))
{
channel = 0;
}
else
{
for (channel = 7; channel > 0; --channel)
{
if (!IsChannelUsed(type, source, channel, &seen))
{
break;
}
}
if (channel == 0)
{ // Crap. No free channels.
return NULL;
}
}
}
// If this actor is already playing something on the selected channel, stop it.
if (type != SOURCE_None && ((source == NULL && channel != CHAN_AUTO) || (source != NULL && IsChannelUsed(type, source, channel, &seen))))
{
for (chan = Channels; chan != NULL; chan = chan->NextChan)
{
if (chan->SourceType == type && chan->EntChannel == channel)
{
if (type != SOURCE_Unattached) chan->Source = source;
else
{
chan->Point[0] == pt->X && chan->Point[2] == pt->Z && chan->Point[1] == pt->Y;
}
}
}
}
// sound is paused and a non-looped sound is being started.
// Such a sound would play right after unpausing which wouldn't sound right.
if (!(chanflags & CHAN_LOOP) && !(chanflags & (CHAN_UI|CHAN_NOPAUSE)) && SoundPaused)
{
return NULL;
}
// Vary the sfx pitches.
if (pitchmask != 0)
{
pitch = DEFAULT_PITCH - (rand() & pitchmask) + (rand() & pitchmask);
}
else
{
pitch = DEFAULT_PITCH;
}
if (chanflags & CHAN_EVICTED)
{
chan = NULL;
}
else
{
int startflags = 0;
if (chanflags & CHAN_LOOP) startflags |= SNDF_LOOP;
if (chanflags & CHAN_AREA) startflags |= SNDF_AREA;
if (chanflags & (CHAN_UI|CHAN_NOPAUSE)) startflags |= SNDF_NOPAUSE;
if (chanflags & CHAN_UI) startflags |= SNDF_NOREVERB;
if (attenuation > 0)
{
LoadSound3D(sfx, &SoundBuffer);
chan = (FSoundChan*)GSnd->StartSound3D (sfx->data3d, &listener, float(volume), rolloff, float(attenuation), pitch, basepriority, pos, vel, channel, startflags, NULL);
}
else
{
chan = (FSoundChan*)GSnd->StartSound (sfx->data, float(volume), pitch, startflags, NULL);
}
}
if (chan == NULL && (chanflags & CHAN_LOOP))
{
chan = (FSoundChan*)GetChannel(NULL);
GSnd->MarkStartTime(chan);
chanflags |= CHAN_EVICTED;
}
if (attenuation > 0)
{
chanflags |= CHAN_IS3D | CHAN_JUSTSTARTED;
}
else
{
chanflags |= CHAN_LISTENERZ | CHAN_JUSTSTARTED;
}
if (chan != NULL)
{
chan->SoundID = sound_id;
chan->OrgID = FSoundID(org_id);
chan->EntChannel = channel;
chan->Volume = float(volume);
chan->ChanFlags |= chanflags;
chan->NearLimit = near_limit;
chan->LimitRange = limit_range;
chan->Pitch = pitch;
chan->Priority = basepriority;
chan->DistanceScale = float(attenuation);
chan->SourceType = type;
if (type == SOURCE_Unattached)
{
chan->Point[0] = pt->X; chan->Point[1] = pt->Y; chan->Point[2] = pt->Z;
}
else if (type != SOURCE_None)
{
chan->Source = source;
}
if (spitch > 0.0)
SetPitch(chan, spitch);
}
return chan;
}
//==========================================================================
//
// S_RestartSound
//
// Attempts to restart looping sounds that were evicted from their channels.
//
//==========================================================================
void SoundEngine::RestartChannel(FSoundChan *chan)
{
assert(chan->ChanFlags & CHAN_EVICTED);
FSoundChan *ochan;
sfxinfo_t *sfx = &S_sfx[chan->SoundID];
FSoundLoadBuffer SoundBuffer;
// If this is a singular sound, don't play it if it's already playing.
if (sfx->bSingular && CheckSingular(chan->SoundID))
return;
sfx = LoadSound(sfx, &SoundBuffer);
// The empty sound never plays.
if (sfx->lumpnum == sfx_empty)
{
return;
}
int oldflags = chan->ChanFlags;
int startflags = 0;
if (chan->ChanFlags & CHAN_LOOP) startflags |= SNDF_LOOP;
if (chan->ChanFlags & CHAN_AREA) startflags |= SNDF_AREA;
if (chan->ChanFlags & (CHAN_UI|CHAN_NOPAUSE)) startflags |= SNDF_NOPAUSE;
if (chan->ChanFlags & CHAN_ABSTIME) startflags |= SNDF_ABSTIME;
if (chan->ChanFlags & CHAN_IS3D)
{
FVector3 pos, vel;
CalcPosVel(chan, &pos, &vel);
if (!ValidatePosVel(chan, pos, vel))
{
return;
}
// If this sound doesn't like playing near itself, don't play it if
// that's what would happen.
if (chan->NearLimit > 0 && CheckSoundLimit(&S_sfx[chan->SoundID], pos, chan->NearLimit, chan->LimitRange, 0, NULL, 0))
{
return;
}
LoadSound3D(sfx, &SoundBuffer);
chan->ChanFlags &= ~(CHAN_EVICTED|CHAN_ABSTIME);
ochan = (FSoundChan*)GSnd->StartSound3D(sfx->data3d, &listener, chan->Volume, &chan->Rolloff, chan->DistanceScale, chan->Pitch,
chan->Priority, pos, vel, chan->EntChannel, startflags, chan);
}
else
{
chan->ChanFlags &= ~(CHAN_EVICTED|CHAN_ABSTIME);
ochan = (FSoundChan*)GSnd->StartSound(sfx->data, chan->Volume, chan->Pitch, startflags, chan);
}
assert(ochan == NULL || ochan == chan);
if (ochan == NULL)
{
chan->ChanFlags = oldflags;
}
}
//==========================================================================
//
// S_LoadSound
//
// Returns a pointer to the sfxinfo with the actual sound data.
//
//==========================================================================
sfxinfo_t *SoundEngine::LoadSound(sfxinfo_t *sfx, FSoundLoadBuffer *pBuffer)
{
if (GSnd->IsNull()) return sfx;
while (!sfx->data.isValid())
{
unsigned int i;
// If the sound doesn't exist, replace it with the empty sound.
if (sfx->lumpnum == -1)
{
sfx->lumpnum = sfx_empty;
}
// See if there is another sound already initialized with this lump. If so,
// then set this one up as a link, and don't load the sound again.
for (i = 0; i < S_sfx.Size(); i++)
{
if (S_sfx[i].data.isValid() && S_sfx[i].link == sfxinfo_t::NO_LINK && S_sfx[i].lumpnum == sfx->lumpnum)
{
//DPrintf (DMSG_NOTIFY, "Linked %s to %s (%d)\n", sfx->name.GetChars(), S_sfx[i].name.GetChars(), i);
sfx->link = i;
// This is necessary to avoid using the rolloff settings of the linked sound if its
// settings are different.
if (sfx->Rolloff.MinDistance == 0) sfx->Rolloff = S_Rolloff;
return &S_sfx[i];
}
}
//DPrintf(DMSG_NOTIFY, "Loading sound \"%s\" (%td)\n", sfx->name.GetChars(), sfx - &S_sfx[0]);
auto sfxdata = ReadSound(sfx->lumpnum);
int size = sfxdata.Size();
if (size > 8)
{
int32_t dmxlen = LittleLong(((int32_t *)sfxdata.Data())[1]);
std::pair<SoundHandle,bool> snd;
// If the sound is voc, use the custom loader.
if (strncmp ((const char *)sfxdata.Data(), "Creative Voice File", 19) == 0)
{
snd = GSnd->LoadSoundVoc(sfxdata.Data(), size);
}
// If the sound is raw, just load it as such.
else if (sfx->bLoadRAW)
{
snd = GSnd->LoadSoundRaw(sfxdata.Data(), size, sfx->RawRate, 1, 8, sfx->LoopStart);
}
// Otherwise, try the sound as DMX format.
else if (((uint8_t *)sfxdata.Data())[0] == 3 && ((uint8_t *)sfxdata.Data())[1] == 0 && dmxlen <= size - 8)
{
int frequency = LittleShort(((uint16_t *)sfxdata.Data())[1]);
if (frequency == 0) frequency = 11025;
snd = GSnd->LoadSoundRaw(sfxdata.Data()+8, dmxlen, frequency, 1, 8, sfx->LoopStart);
}
// If that fails, let the sound system try and figure it out.
else
{
snd = GSnd->LoadSound(sfxdata.Data(), size, false, pBuffer);
}
sfx->data = snd.first;
if(snd.second)
sfx->data3d = sfx->data;
}
if (!sfx->data.isValid())
{
if (sfx->lumpnum != sfx_empty)
{
sfx->lumpnum = sfx_empty;
continue;
}
}
break;
}
return sfx;
}
void SoundEngine::LoadSound3D(sfxinfo_t *sfx, FSoundLoadBuffer *pBuffer)
{
if (GSnd->IsNull()) return;
if(sfx->data3d.isValid())
return;
//DPrintf(DMSG_NOTIFY, "Loading monoized sound \"%s\" (%td)\n", sfx->name.GetChars(), sfx - &S_sfx[0]);
std::pair<SoundHandle, bool> snd;
if (pBuffer->mBuffer.size() > 0)
{
snd = GSnd->LoadSoundBuffered(pBuffer, true);
}
else
{
auto sfxdata = ReadSound(sfx->lumpnum);
int size = sfxdata.Size();
if (size <= 8) return;
int32_t dmxlen = LittleLong(((int32_t *)sfxdata.Data())[1]);
// If the sound is voc, use the custom loader.
if (strncmp((const char *)sfxdata.Data(), "Creative Voice File", 19) == 0)
{
snd = GSnd->LoadSoundVoc(sfxdata.Data(), size, true);
}
// If the sound is raw, just load it as such.
else if (sfx->bLoadRAW)
{
snd = GSnd->LoadSoundRaw(sfxdata.Data(), size, sfx->RawRate, 1, 8, sfx->LoopStart, true);
}
// Otherwise, try the sound as DMX format.
else if (((uint8_t *)sfxdata.Data())[0] == 3 && ((uint8_t *)sfxdata.Data())[1] == 0 && dmxlen <= size - 8)
{
int frequency = LittleShort(((uint16_t *)sfxdata.Data())[1]);
if (frequency == 0) frequency = 11025;
snd = GSnd->LoadSoundRaw(sfxdata.Data() + 8, dmxlen, frequency, 1, 8, sfx->LoopStart, -1, true);
}
// If that fails, let the sound system try and figure it out.
else
{
snd = GSnd->LoadSound(sfxdata.Data(), size, true, pBuffer);
}
}
sfx->data3d = snd.first;
}
//==========================================================================
//
// S_CheckSingular
//
// Returns true if a copy of this sound is already playing.
//
//==========================================================================
bool SoundEngine::CheckSingular(int sound_id)
{
for (FSoundChan *chan = Channels; chan != NULL; chan = chan->NextChan)
{
if (chan->OrgID == sound_id)
{
return true;
}
}
return false;
}
//==========================================================================
//
// S_CheckSoundLimit
//
// Limits the number of nearby copies of a sound that can play near
// each other. If there are NearLimit instances of this sound already
// playing within sqrt(limit_range) (typically 256 units) of the new sound, the
// new sound will not start.
//
// If an actor is specified, and it is already playing the same sound on
// the same channel, this sound will not be limited. In this case, we're
// restarting an already playing sound, so there's no need to limit it.
//
// Returns true if the sound should not play.
//
//==========================================================================
bool SoundEngine::CheckSoundLimit(sfxinfo_t *sfx, const FVector3 &pos, int near_limit, float limit_range,
int sourcetype, const void *actor, int channel)
{
FSoundChan *chan;
int count;
for (chan = Channels, count = 0; chan != NULL && count < near_limit; chan = chan->NextChan)
{
if (!(chan->ChanFlags & CHAN_EVICTED) && &S_sfx[chan->SoundID] == sfx)
{
FVector3 chanorigin;
if (actor != NULL && chan->EntChannel == channel &&
chan->SourceType == sourcetype && chan->Source == actor)
{ // We are restarting a playing sound. Always let it play.
return false;
}
CalcPosVel(chan, &chanorigin, NULL);
if ((chanorigin - pos).LengthSquared() <= limit_range)
{
count++;
}
}
}
return count >= near_limit;
}
//==========================================================================
//
// S_StopSound
//
// Stops an unpositioned sound from playing on a specific channel.
//
//==========================================================================
void SoundEngine::StopSound (int channel)
{
FSoundChan *chan = Channels;
while (chan != NULL)
{
FSoundChan *next = chan->NextChan;
if (chan->SourceType == SOURCE_None)
{
StopChannel(chan);
}
chan = next;
}
}
//==========================================================================
//
// S_StopSound
//
// Stops a sound from a single actor from playing on a specific channel.
//
//==========================================================================
void SoundEngine::StopSound(int sourcetype, const void* actor, int channel)
{
FSoundChan* chan = Channels;
while (chan != NULL)
{
FSoundChan* next = chan->NextChan;
if (chan->SourceType == sourcetype &&
chan->Source == actor &&
(chan->EntChannel == channel || channel < 0))
{
StopChannel(chan);
}
chan = next;
}
}
//==========================================================================
//
// S_StopAllChannels
//
//==========================================================================
void SoundEngine::StopAllChannels ()
{
FSoundChan *chan = Channels;
while (chan != NULL)
{
FSoundChan *next = chan->NextChan;
StopChannel(chan);
chan = next;
}
if (GSnd)
GSnd->UpdateSounds();
}
//==========================================================================
//
// S_RelinkSound
//
// Moves all the sounds from one thing to another. If the destination is
// NULL, then the sound becomes a positioned sound.
//==========================================================================
void SoundEngine::RelinkSound (int sourcetype, const void *from, const void *to, const FVector3 *optpos)
{
if (from == NULL)
return;
FSoundChan *chan = Channels;
while (chan != NULL)
{
FSoundChan *next = chan->NextChan;
if (chan->SourceType == sourcetype && chan->Source == from)
{
if (to != NULL)
{
chan->Source = to;
}
else if (!(chan->ChanFlags & CHAN_LOOP) && optpos)
{
chan->Source = NULL;
chan->SourceType = SOURCE_Unattached;
chan->Point[0] = optpos->X;
chan->Point[1] = optpos->Y;
chan->Point[2] = optpos->Z;
}
else
{
StopChannel(chan);
}
}
chan = next;
}
}
//==========================================================================