Author: post
Date: 2009-10-09 18:02:52 +0200 (Fri, 09 Oct 2009)
New Revision: 159
Modified:
RawSpeed/OrfDecoder.cpp
Log:
- Added comment to ORF decoder.
Modified: RawSpeed/OrfDecoder.cpp
===================================================================
--- RawSpeed/OrfDecoder.cpp 2009-10-09 15:13:38 UTC (rev 158)
+++ RawSpeed/OrfDecoder.cpp 2009-10-09 16:02:52 UTC (rev 159)
@@ -94,6 +94,12 @@
return mRaw;
}
+/* This is probably the slowest decoder of them all.
+ * I cannot see any way to effectively speed up the prediction
+ * phase, which is by far the slowest part of this algorithm.
+ * Also there is no way to multithread this code, since prediction
+ * is based on the output of all previous pixel (bar the first four)
+ */
void OrfDecoder::decodeCompressed(ByteStream& s, guint w, guint h) {
int nbits, sign, low, high, i, wo, n, nw;
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