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-rw-r--r--gst/deinterlace/gstdeinterlace.c21
1 files changed, 18 insertions, 3 deletions
diff --git a/gst/deinterlace/gstdeinterlace.c b/gst/deinterlace/gstdeinterlace.c
index 20da65cc..0b178492 100644
--- a/gst/deinterlace/gstdeinterlace.c
+++ b/gst/deinterlace/gstdeinterlace.c
@@ -27,6 +27,21 @@
#include <gst/video/video.h>
#include "gstdeinterlace.h"
+/* these macros are adapted from videotestsrc, paint_setup_I420() */
+#define ROUND_UP_2(x) (((x)+1)&~1)
+#define ROUND_UP_4(x) (((x)+3)&~3)
+#define ROUND_UP_8(x) (((x)+7)&~7)
+
+#define GST_VIDEO_I420_Y_ROWSTRIDE(width) (ROUND_UP_4(width))
+#define GST_VIDEO_I420_U_ROWSTRIDE(width) (ROUND_UP_8(width)/2)
+#define GST_VIDEO_I420_V_ROWSTRIDE(width) ((ROUND_UP_8(GST_VIDEO_I420_Y_ROWSTRIDE(width)))/2)
+
+#define GST_VIDEO_I420_Y_OFFSET(w,h) (0)
+#define GST_VIDEO_I420_U_OFFSET(w,h) (GST_VIDEO_I420_Y_OFFSET(w,h)+(GST_VIDEO_I420_Y_ROWSTRIDE(w)*ROUND_UP_2(h)))
+#define GST_VIDEO_I420_V_OFFSET(w,h) (GST_VIDEO_I420_U_OFFSET(w,h)+(GST_VIDEO_I420_U_ROWSTRIDE(w)*ROUND_UP_2(h)/2))
+
+#define GST_VIDEO_I420_SIZE(w,h) (GST_VIDEO_I420_V_OFFSET(w,h)+(GST_VIDEO_I420_V_ROWSTRIDE(w)*ROUND_UP_2(h)/2))
+
/* elementfactory information */
static GstElementDetails deinterlace_details =
GST_ELEMENT_DETAILS ("Deinterlace",
@@ -173,10 +188,10 @@ gst_deinterlace_link (GstPad * pad, const GstCaps * caps)
gst_structure_get_int (structure, "width", &filter->width);
gst_structure_get_int (structure, "height", &filter->height);
- if (filter->picsize != (filter->width * filter->height)) {
+ if (filter->picsize != GST_VIDEO_I420_SIZE (filter->width, filter->height)) {
if (filter->src)
g_free (filter->src);
- filter->picsize = filter->width * filter->height;
+ filter->picsize = GST_VIDEO_I420_SIZE (filter->width, filter->height);
filter->src = g_malloc (filter->picsize);
}
@@ -250,7 +265,7 @@ gst_deinterlace_chain (GstPad * pad, GstData * _data)
/* 2 pixels per 2 lines = 4 pixel and we don't want to change */
/* the color of */
- y_line = width;
+ y_line = GST_VIDEO_I420_Y_ROWSTRIDE (width);
y_src = src;
iThreshold = iThreshold * iThreshold * 4;