private CloseableReference<Bitmap> decodeStaticImageFromStream(
InputStream inputStream, BitmapFactory.Options options) {
Preconditions.checkNotNull(inputStream);
int sizeInBytes =
BitmapUtil.getSizeInByteForBitmap(
options.outWidth, options.outHeight, options.inPreferredConfig);
final Bitmap bitmapToReuse = mBitmapPool.get(sizeInBytes);
if (bitmapToReuse == null) {
throw new NullPointerException("BitmapPool.get returned null");
}
options.inBitmap = bitmapToReuse;
Bitmap decodedBitmap;
ByteBuffer byteBuffer = mDecodeBuffers.acquire();
if (byteBuffer == null) {
byteBuffer = ByteBuffer.allocate(DECODE_BUFFER_SIZE);
}
try {
options.inTempStorage = byteBuffer.array();
decodedBitmap = BitmapFactory.decodeStream(inputStream, null, options);
} catch (RuntimeException re) {
mBitmapPool.release(bitmapToReuse);
throw re;
} finally {
mDecodeBuffers.release(byteBuffer);
}
if (bitmapToReuse != decodedBitmap) {
mBitmapPool.release(bitmapToReuse);
decodedBitmap.recycle();
throw new IllegalStateException();
}
return CloseableReference.of(decodedBitmap, mBitmapPool);
}
public ArtDecoder(BitmapPool bitmapPool, int maxNumThreads) {
mBitmapPool = bitmapPool;
mDecodeBuffers = new SynchronizedPool<>(maxNumThreads);
for (int i = 0; i < maxNumThreads; i++) {
mDecodeBuffers.release(ByteBuffer.allocate(DECODE_BUFFER_SIZE));
}
}