diff options
| -rw-r--r-- | doc/lua_api.txt | 7 | ||||
| -rw-r--r-- | src/client/sound_openal.cpp | 55 |
2 files changed, 35 insertions, 27 deletions
diff --git a/doc/lua_api.txt b/doc/lua_api.txt index 88d99fcd5..ba55033dd 100644 --- a/doc/lua_api.txt +++ b/doc/lua_api.txt @@ -5238,9 +5238,12 @@ Sounds * `minetest.sound_fade(handle, step, gain)` * `handle` is a handle returned by `minetest.sound_play` * `step` determines how fast a sound will fade. - Negative step will lower the sound volume, positive step will increase - the sound volume. + The gain will change by this much per second, + until it reaches the target gain. + Note: Older versions used a signed step. This is deprecated, but old + code will still work. (the client uses abs(step) to correct it) * `gain` the target gain for the fade. + Fading to zero will delete the sound. Timing ------ diff --git a/src/client/sound_openal.cpp b/src/client/sound_openal.cpp index 20a651c1d..c1c916e68 100644 --- a/src/client/sound_openal.cpp +++ b/src/client/sound_openal.cpp @@ -337,14 +337,12 @@ private: }; std::unordered_map<int, FadeState> m_sounds_fading; - float m_fade_delay; public: OpenALSoundManager(SoundManagerSingleton *smg, OnDemandSoundFetcher *fetcher): m_fetcher(fetcher), m_device(smg->m_device.get()), m_context(smg->m_context.get()), - m_next_id(1), - m_fade_delay(0) + m_next_id(1) { infostream << "Audio: Initialized: OpenAL " << std::endl; } @@ -616,38 +614,45 @@ public: void fadeSound(int soundid, float step, float gain) { - m_sounds_fading[soundid] = FadeState(step, getSoundGain(soundid), gain); + // Ignore the command if step isn't valid. + if (step == 0) + return; + float current_gain = getSoundGain(soundid); + step = gain - current_gain > 0 ? abs(step) : -abs(step); + if (m_sounds_fading.find(soundid) != m_sounds_fading.end()) { + auto current_fade = m_sounds_fading[soundid]; + // Do not replace the fade if it's equivalent. + if (current_fade.target_gain == gain && current_fade.step == step) + return; + m_sounds_fading.erase(soundid); + } + gain = rangelim(gain, 0, 1); + m_sounds_fading[soundid] = FadeState(step, current_gain, gain); } void doFades(float dtime) { - m_fade_delay += dtime; - - if (m_fade_delay < 0.1f) - return; + for (auto i = m_sounds_fading.begin(); i != m_sounds_fading.end();) { + FadeState& fade = i->second; + assert(fade.step != 0); + fade.current_gain += (fade.step * dtime); - float chkGain = 0; - for (auto i = m_sounds_fading.begin(); - i != m_sounds_fading.end();) { - if (i->second.step < 0.f) - chkGain = -(i->second.current_gain); + if (fade.step < 0.f) + fade.current_gain = std::max(fade.current_gain, fade.target_gain); else - chkGain = i->second.current_gain; + fade.current_gain = std::min(fade.current_gain, fade.target_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); + if (fade.current_gain <= 0.f) + stopSound(i->first); + else + updateSoundGain(i->first, fade.current_gain); + // The increment must happen during the erase call, or else it'll segfault. + if (fade.current_gain == fade.target_gain) m_sounds_fading.erase(i++); - } + else + i++; } - m_fade_delay = 0; } bool soundExists(int sound) |