/**
* Creates a transcoded input stream by executing the given command. If <code>in</code> is not
* null, data from it is copied to the command.
*
* @param command The command to execute.
* @param in Data to feed to the command. May be <code>null</code>.
* @throws IOException If an I/O error occurs.
*/
public TranscodeInputStream(String[] command, final InputStream in) throws IOException {
StringBuffer buf = new StringBuffer("Starting transcoder: ");
for (String s : command) {
buf.append('[').append(s).append("] ");
}
LOG.debug(buf);
process = Runtime.getRuntime().exec(command);
processOutputStream = process.getOutputStream();
processInputStream = process.getInputStream();
// Must read stderr from the process, otherwise it may block.
final String name = command[0];
new InputStreamReaderThread(process.getErrorStream(), name, true).start();
// Copy data in a separate thread
if (in != null) {
new Thread(name + " TranscodedInputStream copy thread") {
public void run() {
try {
IOUtils.copy(in, processOutputStream);
} catch (IOException x) {
// Intentionally ignored. Will happen if the remote player closes the stream.
} finally {
IOUtils.closeQuietly(in);
IOUtils.closeQuietly(processOutputStream);
}
}
}.start();
}
}
/** @see InputStream#close() */
public void close() throws IOException {
IOUtils.closeQuietly(processInputStream);
IOUtils.closeQuietly(processOutputStream);
if (process != null) {
process.destroy();
}
}