.lua
Expert Cheater
 Reputation: 1
Joined: 13 Sep 2018
Posts: 194
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 Posted: Mon Nov 04, 2024 4:23 am Post subject: May I ask questions related to bass.ll |
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As shown in the figure, I would like to call the following function:
Can you help me check? It always draws a straight line.
| Code: | local BASS_STREAM_DECODE = 0x200000
local mp3File='C:\\Users\\Administrator\\Desktop\\Test.mp3'
if not bass.BASS_Init(-1, 44100, 0, 0, nil).vDword then
error("BASS Erro")
end
local hs2 = bass.BASS_StreamCreateFile(false, Utf8ToAnsi(mp3File), 0, 0, BASS_STREAM_DECODE).vPointer
bass.BASS_ChannelPlay(hs2, 0)--play music
local byteLength=bass.BASS_ChannelGetLength(hs2,0).vPointer
local time=bass.BASS_ChannelBytes2Seconds(hs2,byteLength).vDouble
len3=os.date('%M:%S',math.floor(time))
dataLength = math.floor(time * 50 + 1)
Data={}
for i = 1,dataLength do
Data[i]={left=0, right=0}
end
for i = 1, dataLength do
local level = bass.BASS_ChannelGetLevel(hs2, 0).vDword
Data[i].left = (level & 0xFFFF)/32768.0
Data[i].right= ((level >> 16) & 0xFFFF)/32768.0
end
function Trunc(x)
if x >= 0 then
return math.floor(x)
else
return math.ceil(x)
end
end
function Draw(control)
if pi then pi.Destroy() end
pi = createPicture()
--pi.Bitmap.Canvas.Clear()
cc.Repaint()
local ww=#Data
local hh=128
local ch=hh/2
--pi.Bitmap.Width=ww
--pi.Bitmap.Height=hh
cc.Canvas.FillRect(0,0,ww,hh)
cc.Canvas.Pen.Color=0xff
for i = 1, #Data do
local L = Data[i].left
local R = Data[i].right
local y1 = ch - Trunc(L*32768 * ch)
local y2 = ch + Trunc(R*32768 * ch)
--print(y1,y2)
--y1 = math.max(0, math.min(y1, hh))
--y2 = math.max(0, math.min(y2, hh))
--if i<=700 then print(yZ) end
cc.Canvas.LineTo(i, y1)
cc.Canvas.MoveTo(i, y2)
end
cc.getCanvas().draw(0,0,pi.getBitmap())
end
Draw(UDF1.Image) |
| Description: |
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| Filesize: |
10.62 KB |
| Viewed: |
605 Time(s) |
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