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-rw-r--r--src/sound_openal.cpp94
1 files changed, 92 insertions, 2 deletions
diff --git a/src/sound_openal.cpp b/src/sound_openal.cpp
index b9af9e3a9..a425af827 100644
--- a/src/sound_openal.cpp
+++ b/src/sound_openal.cpp
@@ -274,6 +274,19 @@ private:
UNORDERED_MAP<std::string, std::vector<SoundBuffer*> > m_buffers;
UNORDERED_MAP<int, PlayingSound*> m_sounds_playing;
v3f m_listener_pos;
+ struct FadeState {
+ FadeState() {}
+ FadeState(float step, float current_gain, float target_gain):
+ step(step),
+ current_gain(current_gain),
+ target_gain(target_gain) {}
+ float step;
+ float current_gain;
+ float target_gain;
+ };
+
+ UNORDERED_MAP<int, FadeState> m_sounds_fading;
+ float m_fade_delay;
public:
bool m_is_initialized;
OpenALSoundManager(OnDemandSoundFetcher *fetcher):
@@ -281,6 +294,7 @@ public:
m_device(NULL),
m_context(NULL),
m_next_id(1),
+ m_fade_delay(0),
m_is_initialized(false)
{
ALCenum error = ALC_NO_ERROR;
@@ -349,6 +363,11 @@ public:
infostream<<"Audio: Deinitialized."<<std::endl;
}
+ void step(float dtime)
+ {
+ doFades(dtime);
+ }
+
void addBuffer(const std::string &name, SoundBuffer *buf)
{
UNORDERED_MAP<std::string, std::vector<SoundBuffer*> >::iterator i =
@@ -515,6 +534,7 @@ public:
addBuffer(name, buf);
return false;
}
+
bool loadSoundData(const std::string &name,
const std::string &filedata)
{
@@ -541,7 +561,7 @@ public:
alListenerf(AL_GAIN, gain);
}
- int playSound(const std::string &name, bool loop, float volume)
+ int playSound(const std::string &name, bool loop, float volume, float fade)
{
maintain();
if(name == "")
@@ -552,8 +572,16 @@ public:
<<std::endl;
return -1;
}
- return playSoundRaw(buf, loop, volume);
+ int handle = -1;
+ if (fade > 0) {
+ handle = playSoundRaw(buf, loop, 0);
+ fadeSound(handle, fade, volume);
+ } else {
+ handle = playSoundRaw(buf, loop, volume);
+ }
+ return handle;
}
+
int playSoundAt(const std::string &name, bool loop, float volume, v3f pos)
{
maintain();
@@ -567,16 +595,55 @@ public:
}
return playSoundRawAt(buf, loop, volume, pos);
}
+
void stopSound(int sound)
{
maintain();
deleteSound(sound);
}
+
+ void fadeSound(int soundid, float step, float gain)
+ {
+ m_sounds_fading[soundid] = FadeState(step, getSoundGain(soundid), gain);
+ }
+
+ void doFades(float dtime)
+ {
+ m_fade_delay += dtime;
+
+ if (m_fade_delay < 0.1f)
+ return;
+
+ float chkGain = 0;
+ for (UNORDERED_MAP<int, FadeState>::iterator i = m_sounds_fading.begin();
+ i != m_sounds_fading.end();) {
+ if (i->second.step < 0.f)
+ chkGain = -(i->second.current_gain);
+ else
+ chkGain = i->second.current_gain;
+
+ if (chkGain < i->second.target_gain) {
+ i->second.current_gain += (i->second.step * m_fade_delay);
+ i->second.current_gain = rangelim(i->second.current_gain, 0, 1);
+
+ updateSoundGain(i->first, i->second.current_gain);
+ ++i;
+ } else {
+ if (i->second.target_gain <= 0.f)
+ stopSound(i->first);
+
+ m_sounds_fading.erase(i++);
+ }
+ }
+ m_fade_delay = 0;
+ }
+
bool soundExists(int sound)
{
maintain();
return (m_sounds_playing.count(sound) != 0);
}
+
void updateSoundPosition(int id, v3f pos)
{
UNORDERED_MAP<int, PlayingSound*>::iterator i = m_sounds_playing.find(id);
@@ -589,6 +656,29 @@ public:
alSource3f(sound->source_id, AL_VELOCITY, 0, 0, 0);
alSourcef(sound->source_id, AL_REFERENCE_DISTANCE, 30.0);
}
+
+ bool updateSoundGain(int id, float gain)
+ {
+ UNORDERED_MAP<int, PlayingSound*>::iterator i = m_sounds_playing.find(id);
+ if (i == m_sounds_playing.end())
+ return false;
+
+ PlayingSound *sound = i->second;
+ alSourcef(sound->source_id, AL_GAIN, gain);
+ return true;
+ }
+
+ float getSoundGain(int id)
+ {
+ UNORDERED_MAP<int, PlayingSound*>::iterator i = m_sounds_playing.find(id);
+ if (i == m_sounds_playing.end())
+ return 0;
+
+ PlayingSound *sound = i->second;
+ ALfloat gain;
+ alGetSourcef(sound->source_id, AL_GAIN, &gain);
+ return gain;
+ }
};
ISoundManager *createOpenALSoundManager(OnDemandSoundFetcher *fetcher)