A question about switching between streams

Question

Hi,
I am using a set of streams and readers in the following format to read from an ascii / binary mixed file. Once i read past all the ascii I break out of the loop and then use the data input stream to read som four byte floats from the binary data.
If you look at the extract from the file that lase piece of ascii that I read in is EST_Header_End. It is then followed by the floats. I know that the .. following the EST_Header_End is carraige return and new line. My problem is that when i start reading the floats i get NaN even though i know for a fact that the values following the .. are floats.The second float that it read in is definitely 1.0 . I cannot understand why this is happening. Surely if i start using a DataInputStream it should start at the same position as the BufferedReader left off.
fis = new FileInputStream(fileName);
bis = new BufferedInputStream(fis);
//allow a reader from a stream
isr = new InputStreamReader(bis);
//read the raw bytes
dis = new DataInputStream(bis);
//read the characters and strings
br = new BufferedReader(isr);EXTRACT FROM FILE
Channel_10 lpc_N..
EST_Header_End..
<..@?...K...>..;>.P.>...>.S:>....4f....}...."=...>...<._@?...K{s.>...>.U.>.L6>..<>....5.....4..0...
for(int k = 0; k < numFrames; k++){
     System.out.println( "reading track" );
     voice.diphone[index].frame[k].setframeTime(dis.readFloat());
     counter += 4;
     System.out.println( "time " + voice.diphone[index].frame[k].getFrameTime());
     voice.diphone[index].frame[k].setIsVal(dis.readFloat());
     System.out.println("isVal "+ voice.diphone[index].frame[k].getIsVal());
     voice.diphone[index].frame[k].setGain(dis.readFloat());
     System.out.println("isVal "+ voice.diphone[index].frame[k].getGain());
     counter += 4;
     for(int l = 0; l < (numChannels); l++){
          voice.diphone[index].frame[k].setValueLpc((dis.readFloat()),l);
          counter += 4;                               
          System.out.println("LPC coefficents at diphone "+ index +" " +"frame "+ k+" Lpc coefficent "+l+" " + voice.diphone[index].frame[k].getValueLpc(l));
}

Answer 1

I assume that you read
EST_Header_End..
with the BufferedReader, using readLine().
The problem is that when doing the readLine() (or any read for that matter) using BufferedReader, it's going to read more data than it needs and store those bytes in the BufferedReaderClass. Then when DataInputStream goes to read, it will not know this and read somewhere down the stream.
Probably, as unpleasant as this is, you need to layer the DataInputStream on top of the BufferedReader. Or maybe you can do something fancy with mark() and reset() altho, doubtful.
>
fis = new FileInputStream(fileName);
bis = new BufferedInputStream(fis);
//allow a reader from a stream
isr = new InputStreamReader(bis);
//read the raw bytes
dis = new DataInputStream(bis);
//read the characters and strings
br = new BufferedReader(isr);EXTRACT FROM FILE
Channel_10 lpc_N..
EST_Header_End..
<..@?...K...>..;>.P.>...>.S:>....4f....}...."=...>...<.
@?...K{s.>...>.U.>.L6>..<>....5.....4..0...
for(int k = 0; k < numFrames; k++){
     System.out.println( "reading track" );
     voice.diphone[index].frame[k].setframeTime(dis.readFlo
t());
     counter += 4;
System.out.println( "time " +
voice.diphone[index].frame[k].getFrameTime());
     voice.diphone[index].frame[k].setIsVal(dis.readFloat()
System.out.println("isVal "+
voice.diphone[index].frame[k].getIsVal());
     voice.diphone[index].frame[k].setGain(dis.readFloat())
System.out.println("isVal "+
voice.diphone[index].frame[k].getGain());
     counter += 4;
     for(int l = 0; l < (numChannels); l++){
          voice.diphone[index].frame[k].setValueLpc((dis.readFl
at()),l);
          counter += 4;                               
System.out.println("LPC coefficents at diphone "+
+ index +" " +"frame "+ k+" Lpc coefficent "+l+" " +
voice.diphone[index].frame[k].getValueLpc(l));