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-rw-r--r--gst/filter/gstiir.c3
-rw-r--r--gst/filter/gstlpwsinc.c3
2 files changed, 6 insertions, 0 deletions
diff --git a/gst/filter/gstiir.c b/gst/filter/gstiir.c
index 0bbcb050..c363802c 100644
--- a/gst/filter/gstiir.c
+++ b/gst/filter/gstiir.c
@@ -193,6 +193,9 @@ gst_iir_chain (GstPad * pad, GstBuffer * buf)
src = (gfloat *) GST_BUFFER_DATA (buf);
+ /* get a writable buffer */
+ buf = gst_buffer_copy_on_write (buf);
+
/* do an in-place edit */
for (i = 0; i < GST_BUFFER_SIZE (buf) / sizeof (gfloat); ++i)
*(src + i) = (gfloat) IIR_filter (filter->state, (double) *(src + i));
diff --git a/gst/filter/gstlpwsinc.c b/gst/filter/gstlpwsinc.c
index 9a0b65e1..fc916a82 100644
--- a/gst/filter/gstlpwsinc.c
+++ b/gst/filter/gstlpwsinc.c
@@ -234,6 +234,9 @@ gst_lpwsinc_chain (GstPad * pad, GstBuffer * buf)
* to make amends we keep the incoming buffer around and write our
* output samples there */
+ /* get a writable buffer */
+ buf = gst_buffer_copy_on_write (buf);
+
src = (gfloat *) GST_BUFFER_DATA (buf);
residue_samples = filter->wing_size * 2 + 1;
input_samples = GST_BUFFER_SIZE (buf) / sizeof (gfloat);