python编写的midi制作软件.doc

用Python编写的Mid音频制作软件源代码如下：#Midi.py:#This file can be used to simply turn MidiTxt file to Mid file.#Author:loupen#Date:2010-7-20#If you want to use it, you must write the MidiTxt file by some rules. #Read the document to learn more.from struct import *#Three global variablesTrackBegin=TrackEnd=ToneFore=1#write the MidiHeaderdef MidiHeader(buffer): buffer.write(pack(ccccBBBB,M,T,h,d,0,0,0,6)def msg(buffer,tracks,deltatime): if deltatime0xff: buffer.write(pack(BBBBBB,0,1,0,tracks,deltatime8,deltatime&0xff) else: buffer.write(pack(BBBBBB,0,1,0,tracks,0,deltatime)return buffer.tell()-3#write the header and tail of tracksdef TrackHeader(buffer,list): buffer.write(pack(cccc,M,T,r,k) list.append(buffer.tell() buffer.write(pack(i,0)def TrackTail(buffer,list): buffer.write(pack(BBBB,0,0xff,0x2f,0) list.append(buffer.tell()#Set the pulse , instrument and controllerdef SetSpeed(buffer,time): time=60.0/int(time) time=int(time*(10*6) buffer.write(pack(BBBBBBB,0,0xff,0x51,3,time16,(time&0xff00)8,time&0xff) return 1#The words , FenZi and FenMu , are from Chinese . Odef SetPulse(buffer,FenZi,FenMu): FenZi=int(FenZi) FenMu=int(FenMu) if FenMu=2: FenMu=1 elif FenMu=4: FenMu=2 elif FenMu=8: FenMu=3 else: return 0 buffer.write(pack(BBBBBBBB,0,0xff,0x58,4,int(FenZi),int(FenMu),0x18,0x08) return 1def SetTone(buffer): buffer.write(pack(BBBBBB,0,0xff,0x59,2,0,0) return 1def SetNumOrder(buffer,time): buffer.write(pack(BBBB,time24,(time&0xff0000)16,(time&0xff00)8,time&0xff)def SetTrackNum(buffer,ad,n): buffer.seek(ad) buffer.write(pack(B,n+1)def SetInstrument(buffer,trackNum,ITNum): trackNum=int(trackNum) trackNum+=0xc0 buffer.write(pack(BBB,0,trackNum,ITNum)def SetController(buffer,trackNum,CtrNum): trackNum=int(trackNum) trackNum+=0xb0 buffer.write(pack(BBBB,0,trackNum,11,CtrNum) buffer.write(pack(BBB,0,0xa,0x40)def SetVolume(buffer,trackNum,S): trackNum=int(trackNum) trackNum+=0xb0 if S=H: buffer.write(pack(BBBB,0,trackNum,7,0x7f) buffer.write(pack(BBB,0,0xa,0x40) if S=L: buffer.write(pack(BBBB,0,trackNum,7,80) buffer.write(pack(BBB,0,0xa,0x40)def SetChanYin(buffer,trackNum): trackNum=int(trackNum) trackNum+=0xb0 buffer.write(pack(BBBB,0,trackNum,1,127)#imitate the function of buffer in Cdef readNext(buffer): while True: a=buffer.read(1) if a in ,n: pass else: return a#def seekFore(buffer,offset):# buffer.seek(buffer.tell()-offset)#Use the following two functions to deal with the eventsdef liftup(buffer,time,note): time=int(time) if time=128: buffer.write(pack(BBBB,0x80|(time7),0x7f&time,note,0) else: buffer.write(pack(BBB,time,note,0)def pressdown(buffer,num,dict,mark,note,force): global ToneFore a=dictnote+(5+mark)*12 if ToneFore=1: num+=0x90 buffer.write(pack(BBBB,0,num,a,force) else: buffer.write(pack(BBB,0,a,force) ToneFore=adef main(lp): track=1;deltatime=120 speed=;temp=0 begin=0;mark=0;time=deltatime TrackNum=0,1,2,3;ITNum=lp;CtrNum=0x7f dict=0:0,1:0,2:2,3:4,4:5,5:7,6:9,7:11 pTxt=open(r.1.txt) s=.%d.mid %lp0 pMid=open(s,wb) if pTxt.read(6)!=: print This is not MidiTxt file! pMid.close() pTxt.close() return 0 while True: if pTxt.read(1)=|: FenMu=pTxt.read(1) pTxt.seek(pTxt.tell()-3) FenZi=pTxt.read(1) n=0 while n8: if readNext(pTxt)=: speed+=a a=readNext(pTxt) MidiHeader(pMid) track=msg(pMid,0,deltatime) TrackHeader(pMid,TrackBegin) SetPulse(pMid,FenZi,FenMu) SetTone(pMid) SetSpeed(pMid,speed) TrackTail(pMid,TrackEnd) pMid.seek(TrackBegin0) SetNumOrder(pMid,TrackEnd0-TrackBegin0-4) pMid.seek(TrackEnd0) a=readNext(pTxt) while a=: pTxt.readline() TrackHeader(pMid,TrackBegin) SetInstrument(pMid,TrackNumn,ITNumn) SetController(pMid,TrackNumn,CtrNum) a=readNext(pTxt) n+=1 while True: if a=|: a=readNext(pTxt) if a=|: a=readNext(pTxt) if a in ,: global ToneFore ToneFore=-1;break elif a=: mark+=1 a=readNext(pTxt) elif a=.: if begin=0: mark-=1 elif begin=1: time*=3.0/2 liftup(pMid,time,ToneFore) begin=0 elif begin=2: a=pTxt.read(1) if a in ,|: if a=|: print | is too close to Number !n,pTxt.tell(),pTxt.read(1) time*=3.0/2 time+=temp liftup(pMid,time,ToneFore) begin=0;temp=0 mark=0 else:continue a=readNext(pTxt) elif a=Y: time=deltatime/2 a=pTxt.read(1) if a in ,|: if a=|: print | is too close to Number !n,pTxt.tell(),pTxt.read(1) if begin=2:time+=temp liftup(pMid,time,ToneFore) begin=0;temp=0 mark=0 a=readNext(pTxt) elif a=E: time=deltatime/4 a=pTxt.read(1) if a in ,|: if a=|: print | is too close to Number !n,pTxt.tell(),pTxt.read(1) if begin=2:time+=temp liftup(pMid,time,ToneFore) begin=0;temp=0 mark=0 a=readNext(pTxt) elif a=S: time=deltatime/8 a=pTxt.read(1) if a in ,|: if a=|: print | is too close to Number !n,pTxt.tell(),pTxt.read(1) if begin=2:time+=temp liftup(pMid,time,ToneFore) begin=0;temp=0 mark=0 a=readNext(pTxt) elif 7=a=0: if begin=0: if a=0: force=0 else: force=100 pressdown(pMid,TrackNumn-1,dict,mark,a,force) time=deltatime mark=0;begin=1 a=pTxt.read(1) if a in ,|: if a=|: print | is too close to Number !n,pTxt.tell(),pTxt.read(1) liftup(pMid,time,ToneFore) begin=0 a=readNext(pTxt) elif begin=2: time=deltatime a=pTxt.read(1) if a in ,|: if a=|: print | is too close to Number !n,pTxt.tell(),pTxt.read(1) time+=temp liftup(pMid,time,ToneFore) begin=0;temp=0 mark=0 a=readNext(pTxt) elif a=: begin=2 temp+=time a=readNext(pTxt) elif a=-: a=pTxt.read(1) if a in ,|: if a=|: print | is too close to Number !n,pTxt.tell(),pTxt.read(1) time+=temp liftup(pMid,time,ToneFore) begin=0;temp=0 mark=0 a=readNext(pTxt) elif a=*: SetVolume(pMid,TrackNumn-1,H) ToneFore=1 a=readNext(pTxt) elif a=,: SetVolume(pMid,TrackNumn-1,L) ToneFore=1 a=readNext(pTxt) elif a=W: SetChanYin(pMid,TrackNumn-1) ToneFore=1 a=readNext(pTxt) else: print This is not MidiTxt file! pMid.close() pTxt.close() return 0 TrackTail(pMid,TrackEnd) pMid.seek(TrackBeginn) SetNumOrder(pMid,TrackEndn-TrackBeginn-4) pMid.seek(TrackEndn) SetTrackNum(pMid,track,n) pMid.close() pTxt.close() print nOK!-LOUPEN以上文件存为midi.py。#test.py:import midii=1z=j=int(input(How many tracks?)while i=j: tmp=input(The Instrument number is:) z.append(int(tmp) i+=1midi.main(z)以上文件存为test.py。以下为mid文本范例【赛马】： 1| 6. 3E 5E | 6. 3E 5E | 6. 3E 5E | 6. 3E 5E | 6E 5E 3E 5E 6E 5E 3E 5E | 6E 5E 3E 5E 6E 5E 3E 5E | 6Y 5E 6E 6Y 5E 6E | 6Y 5E 6E 6Y 5E 6E | .6Y 3Y 1Y .6Y | 3Y 6Y 5Y 3Y | 2E 3E 2E 1E 2E 3E 2E 1E | 2E 3E 2E 1E 2E 3E 2E 1E | .6Y 3Y 1Y .6Y | 3Y 6Y 5Y 3Y | 2E 3E 2E 1E 2E 3E 2E 1E | 2E 3E 2E 1E 2E 3E 2E 1E | 2. .6E 1E | 2. .6E 1E | 2. .6E 1E | 2. .6E 1E | 2E 3E 2E 1E 2E 3E 2E 1E | 2E 3E 2E 1E 2E 3E 2E 1E | 2Y 1E 2E 2Y 1E 2E | 2Y 1E 2E 2Y 1E 2E | .6 6 | 5 3 | 2 5 | 3 1 | .6 6 | 5 3 | 2 5 | 3 1 | .6. 1E 2E | .6. 1E 2E | .6. 1E 2E | .6. 1E 2E | .6E 2E 1E 2E .6E 2E 1E 2E | .6E 2E 1E 2E .6E 2E 1E 2E | .6 .6Y .6Y | .6 .6 | 3 6Y. 1E | 5. 3Y | 5Y 6Y 1Y. 3E | 6 6 | 3 6Y. 1E | 5 5Y 3Y | 2Y 3Y 6Y 5Y | 3 3 | 5 6Y. 1E | 1. .6Y | 2Y 3Y 6Y 5Y | 3 3Y 2Y | 1Y. 2E 3Y 5Y | 6 .6 | 2Y 3Y 1Y. 3E | .6 .6 | 3Y 3E 3E 6Y 1Y | 5Y 5E 5E 5Y 3Y | 5Y 5E 6E 1Y 2E 1E | 6Y 6E 6E 6Y .6Y | 3Y 3E 3E 6Y 1Y | 5Y 5E 5E 5Y 3Y | 2Y 2E 3E 6Y 5Y | 3Y 3E 5E 3Y .6Y | 5Y 5E 5E 6Y 1Y | 1Y 1E 1E 1Y .6Y | 2Y 2E 3E 6Y 5Y | 3Y 3E 5E 3Y 2Y | 1E .6E 1E 2E 3E 2E 3E 5E | 6E 5E 6E 1E 5E 6E 5E 3E | 2E 3E 2E 1E 2E 1E .6E 1E | .6 6 | 0Y .6Y 1Y 3Y | 0Y .6Y 1Y 3Y | 0Y 2Y .7Y 2Y | .6Y 3Y 1Y 3Y | 0Y .6Y 1Y 3Y | 0Y .6Y 1Y 3Y | 0Y 2Y .7Y 2Y | .6Y 3Y 1Y 3Y | 0Y .6Y 1Y 3Y | 0Y .6Y 1Y 3Y | 0Y 2Y .7Y 2Y | .6Y 3Y 1Y 3Y | 0Y 5Y 3Y 2Y | 1Y 2Y 1Y .6 | 2Y 2Y 3Y 1Y | .6. 3E 5E | .6. 3E 5E | .6. 3E 5E | .6. 3E 5E | .6. 1E 2E | 3E 2E 3E 5E 6E 1E 6E 5E | 3E 2E 3E 5E 6E 1E 6E 5E | 3E 5E 3E 2E 1Y 3Y | .6. 1E 2E | 3E 2E 3E 5E 6E 1E 6E 5E | 3E 2E 3E 5E 6E 1E 6E 5E | 3E 5E 3E 2E 1Y 3Y | .6. 3E 6E | 1Y 6Y 6Y 3Y | 1Y 6Y 6Y 3Y | 1Y 6Y 6Y 3