/** Dummy Constructor */
public RiffFile() {
file = null;
fmode = RFM_UNKNOWN;
riff_header = new RiffChunkHeader();
riff_header.ckID = FourCC("RIFF");
riff_header.ckSize = 0;
}
/** Open a RIFF file. */
public int Open(String Filename, int NewMode) {
int retcode = DDC_SUCCESS;
if (fmode != RFM_UNKNOWN) {
retcode = Close();
}
if (retcode == DDC_SUCCESS) {
switch (NewMode) {
case RFM_WRITE:
try {
file = new RandomAccessFile(Filename, "rw");
try {
// Write the RIFF header...
// We will have to come back later and patch it!
byte[] br = new byte[8];
br[0] = (byte) ((riff_header.ckID >>> 24) & 0x000000FF);
br[1] = (byte) ((riff_header.ckID >>> 16) & 0x000000FF);
br[2] = (byte) ((riff_header.ckID >>> 8) & 0x000000FF);
br[3] = (byte) (riff_header.ckID & 0x000000FF);
byte br4 = (byte) ((riff_header.ckSize >>> 24) & 0x000000FF);
byte br5 = (byte) ((riff_header.ckSize >>> 16) & 0x000000FF);
byte br6 = (byte) ((riff_header.ckSize >>> 8) & 0x000000FF);
byte br7 = (byte) (riff_header.ckSize & 0x000000FF);
br[4] = br7;
br[5] = br6;
br[6] = br5;
br[7] = br4;
file.write(br, 0, 8);
fmode = RFM_WRITE;
} catch (IOException ioe) {
file.close();
fmode = RFM_UNKNOWN;
}
} catch (IOException ioe) {
fmode = RFM_UNKNOWN;
retcode = DDC_FILE_ERROR;
}
break;
case RFM_READ:
try {
file = new RandomAccessFile(Filename, "r");
try {
// Try to read the RIFF header...
byte[] br = new byte[8];
file.read(br, 0, 8);
fmode = RFM_READ;
riff_header.ckID =
((br[0] << 24) & 0xFF000000)
| ((br[1] << 16) & 0x00FF0000)
| ((br[2] << 8) & 0x0000FF00)
| (br[3] & 0x000000FF);
riff_header.ckSize =
((br[4] << 24) & 0xFF000000)
| ((br[5] << 16) & 0x00FF0000)
| ((br[6] << 8) & 0x0000FF00)
| (br[7] & 0x000000FF);
} catch (IOException ioe) {
file.close();
fmode = RFM_UNKNOWN;
}
} catch (IOException ioe) {
fmode = RFM_UNKNOWN;
retcode = DDC_FILE_ERROR;
}
break;
default:
retcode = DDC_INVALID_CALL;
}
}
return retcode;
}
