X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=filter_common.c;h=bc5539d0b842a7f81a735a53918c565d4c785d02;hp=94e553b6e6ae63270cc81fc602b0fd57f1eb67e3;hb=4c537cd0770d81fc3c3937010b75a67f18370d84;hpb=c87045a40b9462ebeb28cc169d7bb3721c9a81d3

diff --git a/filter_common.c b/filter_common.c
index 94e553b6..bc5539d0 100644
--- a/filter_common.c
+++ b/filter_common.c
@@ -275,3 +275,23 @@ void print_filter_helps(int detailed)
 	}
 
 }
+
+/** 640K ought to be enough for everybody ;) */
+#define FILTER_MAX_PENDING (640 * 1024)
+
+int prepare_filter_node(struct btr_node *btrn, size_t min_len)
+{
+	size_t iqs;
+
+	if (btr_eof(btrn))
+		return -E_FC_EOF;
+	if (btr_bytes_pending(btrn) > FILTER_MAX_PENDING)
+		return 0;
+	iqs = btr_get_input_queue_size(btrn);
+	if (iqs < min_len && !btr_no_parent(btrn))
+		return 0;
+	assert(iqs != 0);
+	/* avoid "buffer too small" errors from the decoder */
+	btr_merge_to(btrn, min_len);
+	return 1;
+}