transceiver, resamp: enlarge transmit resampler output buffer
It was possible to reach a state where a resampled burst would
overrun the transmit output buffer and corrupt the global
allocated signal vectors. The result was a segmentation fault
when attempting to access heap allocated signal vectors since
the pointers were garbage.
Whether the segfault occured or not appears to depend on the
memory location of the signal vector pointers, since it does
not occur on all systems.
Double buffer size to accomodate an incoming burst plus up to
a full chunk that may be remaining from the previous resampling
operation.
Signed-off-by: Thomas Tsou <ttsou@vt.edu>
git-svn-id: http://wush.net/svn/range/software/public/openbts/trunk@2691 19bc5d8c-e614-43d4-8b26-e1612bc8e597
diff --git a/Transceiver52M/radioIOResamp.cpp b/Transceiver52M/radioIOResamp.cpp
index 3918068..8e8ac75 100644
--- a/Transceiver52M/radioIOResamp.cpp
+++ b/Transceiver52M/radioIOResamp.cpp
@@ -51,8 +51,16 @@
signalVector *tx_vec = 0;
signalVector *rx_vec = 0;
-/* High rate (device facing) buffers */
-short tx_buf[INCHUNK * 2 * 2];
+/*
+ * High rate (device facing) buffers
+ *
+ * Transmit side samples are pushed after each burst so accomodate
+ * a resampled burst plus up to a chunk left over from the previous
+ * resampling operation.
+ *
+ * Receive side samples always pulled with a fixed size.
+ */
+short tx_buf[INCHUNK * 2 * 4];
short rx_buf[OUTCHUNK * 2 * 2];
/*