Fix lock-up under the frame-flood, when the frame rate is significantly faster than processing

2 files changed, 23 insertions, 3 deletions

diff --git a/ipecamera/events.c b/ipecamera/events.c
index 58c29a1..3253fc5 100644
--- a/ipecamera/events.c
+++ b/ipecamera/events.c
@@ -139,7 +139,7 @@ int ipecamera_next_event(pcilib_context_t *vctx, pcilib_timeout_t timeout, pcili
     }
 
 retry:
-    if ((ctx->event_id - ctx->reported_id) > (ctx->buffer_size - IPECAMERA_RESERVE_BUFFERS)) ctx->reported_id = ctx->event_id - (ctx->buffer_size - 1) - IPECAMERA_RESERVE_BUFFERS;
+    if ((ctx->event_id - ctx->reported_id) > (ctx->buffer_size - IPECAMERA_RESERVE_BUFFERS)) ctx->reported_id = ctx->event_id - (ctx->buffer_size - 1 - IPECAMERA_RESERVE_BUFFERS);
     else ++ctx->reported_id;
 
     if (evid) *evid = ctx->reported_id;
@@ -152,9 +152,9 @@ retry:
 	else
 	    return PCILIB_ERROR_INVALID_ARGUMENT;
     }
-    
+
     if ((ctx->event_id - ctx->reported_id) >= ctx->buffer_size) goto retry;
-    
+
     return 0;
 }
 
diff --git a/tests/grabhw.sh b/tests/grabhw.sh
new file mode 100755
index 0000000..0279ab4
--- /dev/null
+++ b/tests/grabhw.sh
@@ -0,0 +1,20 @@
+#! /bin/bash
+
+function pci {
+    PCILIB_PATH="/root/pcitool"
+    LD_LIBRARY_PATH="$PCILIB_PATH" $PCILIB_PATH/pci $*
+}
+
+function enable_hw_trigger {
+    usleep 100000
+    pci -w control 0xa01
+}
+
+rm -f images.raw
+
+enable_hw_trigger &
+pid=$!
+
+echo "Starting the grabber"
+pci -g -o images.raw --run-time 60000000 --verbose 10 -o /dev/null
+wait $pid