java.lang.Object
org.xml.sax.helpers.XMLFilterImpl
org.esau.ptarmigan.impl.filter.BaseFilter
org.esau.ptarmigan.impl.filter.BinaryFilter
org.esau.ptarmigan.impl.filter.MPEGFilter
- All Implemented Interfaces:
- org.esau.ptarmigan.impl.ByteStreamSource, org.xml.sax.ContentHandler, org.xml.sax.DTDHandler, org.xml.sax.EntityResolver, org.xml.sax.ErrorHandler, org.xml.sax.XMLFilter, org.xml.sax.XMLReader
- public final class MPEGFilter
- extends BinaryFilter
Extract metadata from MPEG frame data, if present
TODO: add VBR calculation
Reference:
http://www.dv.co.yu/mpgscript/mpeghdr.htm
- Version:
- $Revision: 1.6 $ $Date: 2002/10/03 20:56:11 $
| Methods inherited from class org.esau.ptarmigan.impl.filter.BinaryFilter |
counter, doParse, fastForward, read, read, read, readCharBE, readCharLE, readInt16BE, readInt16LE, readInt24BE, readInt24LE, readInt32BE, readInt32LE, remaining, rewind, setCounterLimit, skip |
| Methods inherited from class org.esau.ptarmigan.impl.filter.BaseFilter |
characters, getByteStream, getChars, getMediaProperties, parse, setMediaProperties, sourceIsXML, write, write, write, write, write, write, write, write, write, write, write, writeDate, writeDate, writeDate, writeDate, writeInteger, writeInteger, writeInteger, writeInteger, writeInteger, writeString, writeString, writeString, writeString, writeString |
| Methods inherited from class org.xml.sax.helpers.XMLFilterImpl |
endDocument, endElement, endPrefixMapping, error, fatalError, getContentHandler, getDTDHandler, getEntityResolver, getErrorHandler, getFeature, getParent, getProperty, ignorableWhitespace, notationDecl, parse, processingInstruction, resolveEntity, setContentHandler, setDocumentLocator, setDTDHandler, setEntityResolver, setErrorHandler, setFeature, setParent, setProperty, skippedEntity, startDocument, startElement, startPrefixMapping, unparsedEntityDecl, warning |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
HEADER_SIZE
static final int HEADER_SIZE
- See Also:
- Constant Field Values
NS_URI
static final java.lang.String NS_URI
- See Also:
- Constant Field Values
NS_PREFIX
static final java.lang.String NS_PREFIX
- See Also:
- Constant Field Values
log
static org.apache.commons.logging.Log log
- logging object
MPEGFilter
public MPEGFilter()
throws org.xml.sax.SAXException
getNamespaceURI
java.lang.String getNamespaceURI()
- Specified by:
getNamespaceURI in class BaseFilter
getNamespacePrefix
java.lang.String getNamespacePrefix()
- Specified by:
getNamespacePrefix in class BaseFilter
doParse
public void doParse()
throws org.xml.sax.SAXException,
java.io.IOException,
java.text.ParseException
- SAX-Invoked parse of a 'document' from an input stream.
Read available bytes to try to find consecutive MPEG frames.
If successful, we'll position at the start of the first one.
If not successful, we'll reset() the input stream.
- Specified by:
doParse in class BinaryFilter
locateNextHeader
boolean locateNextHeader(org.esau.ptarmigan.impl.MPEGFrameHeader header,
int max_bytes)
throws java.io.IOException
- Read as many as max_bytes to locate the next 'valid' MPEGFrameHeader.
Note that it though it is valid, it may not actually be the real
header (i.e., it could be random noise at the start of the stream).
true is returned if a valid frame is found, the stream is positioned
one byte beyond the header.
false is returned if no header could be found before max_bytes or
the bytes available in the stream were exhausted.
writeSAX
void writeSAX(org.esau.ptarmigan.impl.MPEGFrameHeader header,
int avg_bitrate)
throws java.io.IOException,
org.xml.sax.SAXException
- build the xml content from the first good header
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