cambridge/load/bgm.lua

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bgm = {
credit_roll = {
gm3 = love.audio.newSource("res/bgm/tgm_credit_roll.mp3", "stream"),
},
pacer_test = love.audio.newSource("res/bgm/pacer_test.mp3", "stream"),
}
local current_bgm = nil
local pitch = 1
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local bgm_locked = false
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function switchBGM(sound, subsound)
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if bgm_locked then
return
end
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if current_bgm ~= nil then
current_bgm:stop()
end
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if config.bgm_volume <= 0 then
current_bgm = nil
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elseif sound ~= nil then
if subsound ~= nil then
current_bgm = bgm[sound][subsound]
else
current_bgm = bgm[sound]
end
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else
current_bgm = nil
end
if current_bgm ~= nil then
resetBGMFadeout()
end
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end
function switchBGMLoop(sound, subsound)
switchBGM(sound, subsound)
if current_bgm then current_bgm:setLooping(true) end
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end
function lockBGM()
bgm_locked = true
end
function unlockBGM()
bgm_locked = false
end
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local fading_bgm = false
local fadeout_time = 0
local total_fadeout_time = 0
function fadeoutBGM(time)
if fading_bgm == false then
fading_bgm = true
fadeout_time = time
total_fadeout_time = time
end
end
function resetBGMFadeout(time)
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current_bgm:setVolume(config.bgm_volume)
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fading_bgm = false
resumeBGM()
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end
function processBGMFadeout(dt)
if current_bgm and fading_bgm then
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fadeout_time = fadeout_time - dt
if fadeout_time < 0 then
fadeout_time = 0
fading_bgm = false
end
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current_bgm:setVolume(
fadeout_time * config.bgm_volume / total_fadeout_time
)
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end
end
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function pauseBGM()
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if current_bgm ~= nil then
current_bgm:pause()
end
end
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function resumeBGM()
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if current_bgm ~= nil then
current_bgm:play()
current_bgm:setPitch(pitch)
end
end
function pitchBGM(new_pitch)
pitch = new_pitch
if current_bgm ~= nil then
current_bgm:setPitch(pitch)
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end
end