⽤python读取MiniSEED格式⽂件完整的MiniSEED解压缩处理，不过输出SAC暂时未实现，只输出⼀个⽂本⽂件。
import struct
import sys,datetime
import pylab
def mseed_btime2pydatetime(btime0):
year=int(btime0[0])
nDay=int(btime0[1])
y0=year-1
dt0=datetime.datetime(y0,12,31)
td=datetime.timedelta(days=nDay)
dt1=dt0+td
dt9=datetime.h,dt1.day,int(btime0[2]),int(btime0[3]),int(btime0[4]),int(btime0[6])*100)
return dt9
#xx
class mseed_data_record():
#only data
python怎么读取py文件def __init__(self):
dataDiff=[]
dataVal=[]
dataTime=[]
dataTimeFlag=[]
x0=0
x1=0
#dataBtime
#dataOption
#dataFirst
class mseed_record_parser:
def parse(self,recordBin,infoLevel):
#m_recordBin=recordBin
self.m_InfoLevel=infoLevel
dataDiff=[]
dataVal=[]
dataTime=[]
dataTimeFlag=[]
#frame0
sFrame=recordBin[:64]
(dataBtime,dataOption,dataFirst)=self._parse_frame0(sFrame)
if self.m_InfoLevel>0:
print '='*4,(dataFirst),"="*4
if self.m_InfoLevel>1:
print 'btime,samplenum:',dataBtime,dataOption
self.time0=mseed_btime2pydatetime(dataBtime)
#print self.time0.strftime('%Y-%m-%d %H:%M:%S %f')
#frame1
sFrame=recordBin[64:128]
dataBuff=self._parse_frame1(sFrame)
#frame2-7
for i in range(2,8): #512/64=8
sFrame=recordBin[i*64:(i+1)*64]
(dataBuff,n1)=self._parse_frame(sFrame)
if n1==0:
pass
pass
else:
if self.m_InfoLevel>1:
print "x0,xn:",x0,xn
print "datacount(read,get):",dataOption[0],len(dataDiff)
#value from diff
if len(dataDiff)>0 :
v=self.x0
dataVal.append(self.x0)
dataTime.append(self.time0)
dataTimeFlag.append('b')
for i in range(1,len(dataDiff)):
v+=dataDiff[i]
dataVal.append(v)
dataTimeFlag.append("m")
#hits=100,btime step=10000/hits=100,microseconds step=10000
msc=10000*i
msv=msc%1000000
sv=msc/1000000
td=datetime.timedelta(seconds=sv,microseconds=msv)
dt1=self.time0+td
dataTime.append(dt1)
dataTimeFlag[len(dataDiff)-1]='e'
##!!
#must match for data count
if len(dataDiff)!=dataOption[0]:
print "data count from parsing error(fromFile,parse):",dataOption[0],len(dataDiff)  it()
return (dataDiff,dataVal,dataTime,dataTimeFlag,True)
def _frame_getW0Ck(self,w0):
w0ck=[]
w0b=bin(w0)
bn=len(w0b)-2 #remove 0b
ck='0'*(32-bn)+w0b[2:]
for i in range(0,16):
w0ck.append(ck[i*2:(i+1)*2])
return w0ck
def _parse2_Dnib4Ck11(self,val):
vals=[]
h2=(val>>30)&0x3
nv=0; bits=0
if h2==0: #6bit*5
bits=6; nv=5; m1 = 0x0000003f
if h2==1: #5bit*6
bits=5; nv=6; m1 = 0x0000001f
if h2==2: #4bit*7
bits=4; nv=7; m1 = 0x0000000f;
for i in range(0,nv):
vals.append((val>>(bits*i))&m1)
for i in range(len(vals)):
if vals[i]>(2**bits)/2:
vals[i]=vals[i]-(2**bits)
##print valW,bin(valW)
##print "##(dnib-11)h2,vals:",h2,vals  return vals
def _parse2_Dnib4Ck10(self,val):
vals=[]
h2=(val>>30)&0x3
nv=0; bits=0
if h2==1: #30bit*1    ?? ==1
bits=30; nv=1; m1 = 0x3fffffff
#print "30bit:",val,bin(val)
#it()
if h2==2: #15bit*2
bits=15; nv=2;  m1 = 0x00007fff
if h2==3: #10bit*3
bits=10; nv=3;  m1 = 0x000003ff;
for i in range(0,nv):
vals.append((val>>(bits*i))&m1)
#sign
for i in range(len(vals)):
if vals[i]>(2**bits)/2:
vals[i]=vals[i]-(2**bits)
##print valW,bin(valW)
##print "##(dnib-10)h2,vals:",h2,vals  return vals
def _parse2_Byte1x4(self,val):
vals=[]
bits=8;  nv=4;  m1 = 0x000000ff;
for i in range(0,nv):
vals.append((val>>(bits*i))&m1)
for i in range(len(vals)):
if vals[i]>(2**bits)/2:
vals[i]=vals[i]-(2**bits)
##print valW,bin(valW)
##print "byte1x4",vals
return vals
def _parse_package(self,valW,ck):
vals0=[]
if ck=='00':
pass
#print "ck=0"
#it()
if ck=='01': #1byte*4
vals0=self._parse2_Byte1x4(valW)  '''
#ok,ok, same as cpp code
sFmt='>bbbb'  #sFmt_byte1='>bbbb'  valBin=struct.pack('>i',valW)
vals=struct.unpack(sFmt,valBin)
vals0=list(vals)
print valW
print "ck,vals",ck,vals
'''
if ck=='10':
vals0=self._parse2_Dnib4Ck10(valW)
if ck=="11":
vals0=self._parse2_Dnib4Ck11(valW)
return vals0
#ok
def _parse_frame0(self,sFrame):
lineFlag=sFrame[:8]
lineData=sFrame[8:]
sSta=lineData[:5]
sPos=lineData[5:7]
sChn=lineData[7:10]
sNet=lineData[10:12]
sFmtBTime='>HHBBBBH'
sFmtDataHeader='>HhhBBBBiHH'
hdrDataBtime=lineData[12:22]
hdrDataOption=lineData[22:40]
dataBtime=struct.unpack(sFmtBTime,hdrDataBtime)
dataOption=struct.unpack(sFmtDataHeader,hdrDataOption)
return (dataBtime,dataOption,{'sta':sSta,'pos':sPos,'chn':sChn,'net':sNet,'flag':lineFlag})
#ok
def _parse_frame1(self,sFrame):
dataBuff=[]
Wn=struct.unpack('>Iii'+'i'*13,sFrame)
w0=Wn[0]
self.x0=Wn[1]
<=Wn[2]
w0ck=self._frame_getW0Ck(w0)
#print 'w0ck:',w0ck
#print 'Wn:',Wn
for i in range(3,16):
vals=self._parse_package(Wn[i],w0ck[i])
if not vals:
pass
else:
return dataBuff
def _parse_frame(self,sFrame):
dataBuff=[]
Wn=struct.unpack('>I'+'i'*15,sFrame)
w0=Wn[0]
#maybe not exist data
if w0>0 :
w0ck=self._frame_getW0Ck(w0)
#print 'w0',w0ck
#print 'Wn:',Wn
for i in range(1,16):
vals=self._parse_package(Wn[i],w0ck[i])
if not vals:
pass
else:
return (dataBuff,1)
else:
return (dataBuff,0)
class mseed_reader:
'''
seed file read/write. 2013-06-20 by WangBin.
'''
#ok
def read(self,sFile):
self.m_mseedfile=sFile
#try
f=open(sFile,'rb')
self.dataBin_ad()
f.close()
self.g_dataDiff=[]
self.g_dataVal=[]
self.g_dataTime=[]
self.g_dataTimeFlag=[]
return True
def exportSacFile(self,sSacFile,pydatetimeFrom,pydatetimeTo,bBin):
#export to sac file
#find gap
fsac=open("d:\\","wt")
dc=len(self.g_dataTimeFlag)
for i in range(1,dc): #skip first b
if self.g_dataTimeFlag[i]=='b':
dt1=self.g_dataTime[i]
dt0=self.g_dataTime[i-1]
ts0=dt1-dt0
#hits=100
#if (ts0.seconds>0) or (ts0.microseconds>10000): ??
al_seconds()>0.01:
fsac.write(str(i)+"\n")
else:
pass
fsac.close()
if bBin==True:
pass
if bBin==False:
pass
def parseData(self,infoLevel):
self.m_InfoLevel=infoLevel
idxData=0
blocksize=512
self.g_dataDiff=[]
self.g_dataVal=[]
self.g_dataTime=[]
self.g_dataTimeFlag=[]
while True:
recordBin=self.dataBin_all[blocksize*idxData:blocksize*(idxData+1)] #seed=4096,mseed=512  if not recordBin:
print ""

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