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- do not hold persistent references to sound channels in SW's ambient sound code.

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For robustness, channels should always be looked up when needed so that the sound engine is free to do with them as it needs.
This commit is contained in:
Christoph Oelckers 2020-02-23 15:41:57 +01:00
parent 985e441d80
commit c35a2e5f11
1 changed files with 7 additions and 27 deletions
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34
source/sw/src/sounds.cpp
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@ -206,7 +206,6 @@ FRolloffInfo GetRolloff(int basedist)
struct AmbientSound
{
SPRITEp sp;
FSoundChan* sndChan;
int ambIndex;
int vocIndex;
int ChanFlags;
@ -226,12 +225,9 @@ static TArray<AmbientSound*> ambients;
void StopAmbientSound(void)
{
for (auto& amb : ambients)
for (auto amb : ambients)
{
if (amb->sndChan)
{
soundEngine->StopChannel(amb->sndChan);
}
soundEngine->StopSound(SOURCE_Ambient, amb, -1);
}
ambients.Clear();
}
@ -271,7 +267,6 @@ void InitAmbient(int num, SPRITEp sp)
amb->sp = sp;
amb->ambIndex = num;
amb->vocIndex = vnum;
amb->sndChan = nullptr;
amb->ChanFlags = 0;
if (ambarray[num].ambient_flags & v3df_dontpan) amb->ChanFlags |= EChanFlags::FromInt(CHANEXF_DONTPAN);
if (voc[vnum].voc_flags & vf_loop) amb->ChanFlags |= CHANF_LOOP;
@ -354,7 +349,10 @@ static void DoTimedSound(AmbientSound* amb)
amb->curIndex += synctics;
if (amb->curIndex >= amb->maxIndex)
{
if (amb->sndChan == nullptr || (amb->sndChan->ChanFlags & CHANF_FORGETTABLE))
if (soundEngine->EnumerateChannels([=](FSoundChan* tchan)
{
return (tchan->Source == amb && !(tchan->ChanFlags & CHANF_FORGETTABLE));
}))
{
// Check for special case ambient sounds. Since the sound is stopped and doesn't occupy a real channel at this time we can just swap out the sound ID before restarting it.
int ambid = RandomizeAmbientSpecials(amb->vocIndex);
@ -397,11 +395,7 @@ static void UpdateAmbients()
}
else
{
if (amb->sndChan)
{
soundEngine->StopChannel(amb->sndChan);
amb->sndChan = nullptr;
}
soundEngine->StopSound(SOURCE_Ambient, amb, -1);
}
}
@ -427,7 +421,6 @@ class SWSoundEngine : public SoundEngine
// client specific parts of the sound engine go in this class.
void CalcPosVel(int type, const void* source, const float pt[3], int channum, int chanflags, FSoundID chanSound, FVector3* pos, FVector3* vel, FSoundChan* chan) override;
TArray<uint8_t> ReadSound(int lumpnum) override;
void ChannelEnded(FISoundChannel* chan) override;
public:
SWSoundEngine()
@ -450,19 +443,6 @@ TArray<uint8_t> SWSoundEngine::ReadSound(int lumpnum)
return wlump.Read();
}
void SWSoundEngine::ChannelEnded(FISoundChannel* chan)
{
// if this channel belongs to an ambient sound we have to delete the reference to it.
for (auto amb : ambients)
{
if (amb->sndChan == chan)
{
amb->sndChan = nullptr;
}
}
SoundEngine::ChannelEnded(chan);
}
//==========================================================================
//
//