public void Initialize()
{
_resourceReleaser = new MockResourceReleaser <byte[]>();
byte[] bytes = new byte[256];
for (int i = 0; i < 256; ++i)
{
bytes[i] = (byte)i;
}
Stream unbufferedStream = new MemoryStream(bytes);
_buffer = new byte[10];
_pooledByteArrayBufferedInputStream = new PooledByteArrayBufferedInputStream(
unbufferedStream,
_buffer,
_resourceReleaser);
}
/// <summary>
/// If this is the first time calling this method, the buffer will
/// be checked to make sure it starts with SOI marker (0xffd8).
/// If the image has been identified as a non-JPEG, data will be
/// ignored and false will be returned immediately on all
/// subsequent calls.
///
/// This object maintains state of the position of the last read
/// byte. On repeated calls to this method, it will continue from
/// where it left off.
/// </summary>
/// <param name="encodedImage">
/// Next set of bytes received by the caller.
/// </param>
/// <returns>true if a new full scan has been found.</returns>
public bool ParseMoreData(EncodedImage encodedImage)
{
if (_parserState == NOT_A_JPEG)
{
return(false);
}
int dataBufferSize = encodedImage.Size;
// Is there any new data to parse?
// _bytesParsed might be greater than size of dataBuffer - that
// happens when we skip more data than is available to read
// inside DoParseMoreData method.
if (dataBufferSize <= _bytesParsed)
{
return(false);
}
Stream bufferedDataStream = new PooledByteArrayBufferedInputStream(
encodedImage.GetInputStream(),
_byteArrayPool.Get(BUFFER_SIZE),
_byteArrayPool);
try
{
StreamUtil.Skip(bufferedDataStream, _bytesParsed);
return(DoParseMoreData(encodedImage, bufferedDataStream));
}
catch (IOException)
{
// Does not happen - streams returned by IPooledByteBuffers
// do not throw IOExceptions.
throw;
}
finally
{
Closeables.CloseQuietly(bufferedDataStream);
}
}
