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package pt.tumba.parser.swf;
import com.anotherbigidea.flash.SWFConstants;
import java.io.ByteArrayOutputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.RandomAccessFile;
/**
* Implements the SWFTags interface and writes a SWF file to the output stream
*
*@author unknown
*@created 15 de Setembro de 2002
*/
public class SWFWriter implements SWFTags {
/**
* Description of the Field
*/
protected OutStream out;
/**
* Description of the Field
*/
protected OutputStream outputstream;
/**
* Description of the Field
*/
protected ByteArrayOutputStream byteout;
/**
* Description of the Field
*/
protected String filename;
//--deferred header values
/**
* Description of the Field
*/
protected int frameCount;
/**
* Description of the Field
*/
protected int version;
/**
* Description of the Field
*/
protected Rect frameSize;
/**
* Description of the Field
*/
protected int height;
/**
* Description of the Field
*/
protected int rate;
/**
* Constructor for the SWFWriter object
*
*@param filename Description of the Parameter
*@exception FileNotFoundException Description of the Exception
*/
public SWFWriter(String filename) throws FileNotFoundException {
this(new FileOutputStream(filename));
this.filename = filename;
}
/**
* Constructor for the SWFWriter object
*
*@param outputstream Description of the Parameter
*/
public SWFWriter(OutputStream outputstream) {
this.outputstream = outputstream;
out = new OutStream(outputstream);
}
/**
* Constructor for the SWFWriter object
*
*@param outstream Description of the Parameter
*/
public SWFWriter(OutStream outstream) {
out = outstream;
}
/**
* Interface SWFTags
*
*@param version Description of the Parameter
*@param length Description of the Parameter
*@param twipsWidth Description of the Parameter
*@param twipsHeight Description of the Parameter
*@param frameRate Description of the Parameter
*@param frameCount Description of the Parameter
*@exception IOException Description of the Exception
*/
public void header(int version, long length2,
int twipsWidth, int twipsHeight,
int frameRate, int frameCount2) throws IOException {
int frameCount = frameCount2;
long length = length2;
frameSize = new Rect(0, 0, twipsWidth, twipsHeight);
//--Unknown values
if (length < 0 || frameCount < 0) {
//--defer the header
this.version = version;
this.rate = frameRate;
this.frameCount = 0;
if (filename != null) {
//write the header later
length = 0;
frameCount = 0;
} else {
//write to a byte array first
//--set up a byte array for the output
if (byteout == null) {
byteout = new ByteArrayOutputStream(20000);
out = new OutStream(byteout);
}
return;
}
}
writeHeader(version, length, frameRate, frameCount);
}
/**
* Interface SWFTags
*
*@param tagType Description of the Parameter
*@param longTag Description of the Parameter
*@param contents Description of the Parameter
*@exception IOException Description of the Exception
*/
public void tag(int tagType, boolean longTag2,
byte[] contents) throws IOException {
boolean longTag = longTag2;
//System.out.println( "OUT Tag " + tagType + " " + longTag + " " + ( (contents==null) ? 0 : contents.length) );
//System.out.println();
int length = (contents != null) ? contents.length : 0;
longTag = (length > 62) || longTag;
int hdr = (tagType << 6) + (longTag ? 0x3f : length);
out.writeUI16(hdr);
if (longTag) {
out.writeUI32(length);
}
if (contents != null) {
out.write(contents);
}
if (tagType == SWFConstants.TAG_SHOWFRAME) {
frameCount++;
}
if (tagType == SWFConstants.TAG_END) {
finish();
}
}
/**
* Description of the Method
*
*@param version Description of the Parameter
*@param length Description of the Parameter
*@param frameRate Description of the Parameter
*@param frameCount Description of the Parameter
*@exception IOException Description of the Exception
*/
protected void writeHeader(int version, long length,
int frameRate, int frameCount) throws IOException {
//--Write File Signature
out.write(new byte[]{0x46, 0x57, 0x53});
out.writeUI8(version);
out.writeUI32(length);
frameSize.write(out);
out.writeUI16(frameRate << 8);
out.writeUI16(frameCount);
}
/**
* Finish writing
*
*@exception IOException Description of the Exception
*/
protected void finish() throws IOException {
out.flush();
//--Close the output file, calculate length and framecount and then
// rewrite the header.
if (filename != null) {
outputstream.close();
RandomAccessFile raf = new RandomAccessFile(filename, "rw");
int length = (int) raf.length();
byteout = new ByteArrayOutputStream();
out = new OutStream(byteout);
writeHeader(version, length, rate, frameCount);
out.flush();
raf.write(byteout.toByteArray());
raf.close();
return;
}
//--Writing to a byte array - need to recalculate lengths
if (byteout != null) {
byte[] bytes = byteout.toByteArray();
long length = 12L + frameSize.getLength() + bytes.length;
out = new OutStream(outputstream);
writeHeader(version, length, rate, frameCount);
out.write(bytes);
out.flush();
}
}
}
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