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java.lang.Object | +--lava.riff.RiffInputFile
File-based RIFF data source.
Details: This class is a file-IRiffInput.
| Constructor Summary | |
RiffInputFile(java.io.File file)
Binds to file. |
|
| Method Summary | |
void |
close()
Closes input source. |
void |
free(long offset,
long amount)
Unbuffers bytes. |
long |
getLength()
Returns file length. |
long |
getPosition()
Returns read offset. |
int |
read()
Reads byte. |
int |
read(byte[] dest,
int offset,
int amount)
Reads BYTEs. |
int |
read(int[] dest,
int offset,
int amount)
Reads DWORDs. |
int |
read(short[] dest,
int offset,
int amount)
Reads WORDs. |
void |
setPosition(long newpos)
Sets read offset. |
| Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
| Constructor Detail |
public RiffInputFile(java.io.File file)
throws java.io.IOException
Details: This constructor initializes a new instance to read from the given file (file).
file - the input file| Method Detail |
public long getLength()
throws java.io.IOException
Details: This method returns the length of the RIFF file, if it is known, or -1 otherwise.
public long getPosition()
throws java.io.IOException
Details: This method returns the read offset, or the position of the next byte to be read. The position reported may be greater than the length of the stream if it was previously set to be so. (See setPosition
public void setPosition(long newpos)
throws java.io.IOException
Details: This method sets the read offset, or the position of the next byte to be read, to newpos. Setting the position to a value greater than the length of the file is legal, and will not cause an error unless a read is subsequently attempted from that position.
newpos - the new position
public int read()
throws java.io.IOException
Details: This method reads and returns the next BYTE, i.e., the BYTE pointed to by the read offset. The read offset is automatically incremented by 1. The BYTE is zero-int before it is returned. If a BYTE could not be read because the end of the data source was reached, -1 is returned.
public int read(byte[] dest,
int offset,
int amount)
throws java.io.IOException
Details: This method reads a consecutive run of BYTEs from the data source, beginning with the BYTE at the current position. The BYTEs are stored in dest beginning at the given offset (offset). Up to amount BYTEs are read and stored, but the actual number of BYTEs read may be less if the end of the sequence is reached. If BYTEs are read, the number of BYTEs read is returned, but if no BYTEs can be read, -1 is returned. The read offset is automatically advanced by the number of BYTEs read.
dest - the destination arrayoffset - offset into destamount - number of bytes to read
public int read(short[] dest,
int offset,
int amount)
throws java.io.IOException
Details: This method reads a consecutive run of little-endian WORDs, or 16-bit integers, from the data source, beginning with the WORD at the current position. The WORDs are stored in dest beginning at the given offset (offset). Up to amount WORDs are read and stored, but the actual number of WORDs read may be less if the end of the sequence is reached. If WORDs are read, the number of WORDs read is returned, but if no WORDs can be read, -1 is returned. The read offset is automatically advanced by the number of BYTEs read.
dest - the destination arrayoffset - offset into destamount - number of bytes to read
public int read(int[] dest,
int offset,
int amount)
throws java.io.IOException
Details: This method reads a consecutive run of little-endian DWORDs, or 32-bit integers, from the data source, beginning with the DWORD at the current position. The DWORDs are stored in dest beginning at the given offset (offset). Up to amount DWORDs are read and stored, but the actual number of DWORDs read may be less if the end of the sequence is reached. If DWORDs are read, the number of DWORDs read is returned, but if no DWORDs can be read, -1 is returned. The read offset is automatically advanced by the number of BYTEs read.
dest - the destination arrayoffset - offset into destamount - number of bytes to read
public void free(long offset,
long amount)
Details: This method advises this implementation that the given range of bytes can be unbuffered because the consumer has no need to read them again. Revisiting segments of this data source after they have been freed can cause an exception, return incorrect data, or simply cause undetected, unpredictable results.
offset - the position of the forgettable segmentamount - the length of the forgettable segment
public void close()
throws java.io.IOException
Details: close closes this data source and releases associated resources. Calling any of the other methods after close may produce unpredictable results or generate an exception.
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