video-scaler: fix temp line allocation

We need to allocate the templine with the amount of pixels we are going
to handle, which we only know for the vertical resampler when we are
asked to resample.

diff --git a/gst-libs/gst/video/video-scaler.c b/gst-libs/gst/video/video-scaler.c
index bfc4d6c..372e3d8 100644 (file)
--- a/gst-libs/gst/video/video-scaler.c
+++ b/gst-libs/gst/video/video-scaler.c
@@ -62,6 +62,7 @@ struct _GstVideoScaler
   /* for ORC */
   gint inc;
 
+  gint tmpwidth;
   guint32 *tmpline1;
   guint32 *tmpline2;
 };
@@ -106,6 +107,16 @@ resampler_zip (GstVideoResampler * resampler, const GstVideoResampler * r1,
   }
 }
 
+static void
+realloc_tmplines (GstVideoScaler * scale, gint width)
+{
+  scale->tmpline1 =
+      g_realloc (scale->tmpline1,
+      sizeof (gint32) * width * 4 * scale->resampler.max_taps);
+  scale->tmpline2 = g_realloc (scale->tmpline2, sizeof (gint32) * width * 4);
+  scale->tmpwidth = width;
+}
+
 /**
  * gst_video_scaler_new:
  * @method: a #GstVideoResamplerMethod
@@ -164,10 +175,6 @@ gst_video_scaler_new (GstVideoResamplerMethod method, GstVideoScalerFlags flags,
   else
     scale->inc = ((in_size - 1) << 16) / (out_size - 1) - 1;
 
-  scale->tmpline1 =
-      g_malloc (sizeof (gint32) * out_size * 4 * scale->resampler.max_taps);
-  scale->tmpline2 = g_malloc (sizeof (gint32) * out_size * 4);
-
   return scale;
 }
 
@@ -727,6 +734,9 @@ gst_video_scaler_horizontal (GstVideoScaler * scale, GstVideoFormat format,
   pstride = finfo->pixel_stride[0];
   g_return_if_fail (pstride == 4 || pstride == 8);
 
+  if (scale->tmpwidth < width)
+    realloc_tmplines (scale, width);
+
   switch (pstride) {
     case 4:
       switch (scale->resampler.max_taps) {
@@ -797,6 +807,9 @@ gst_video_scaler_vertical (GstVideoScaler * scale, GstVideoFormat format,
   pstride = finfo->pixel_stride[0];
   g_return_if_fail (pstride == 4 || pstride == 8);
 
+  if (scale->tmpwidth < width)
+    realloc_tmplines (scale, width);
+
   switch (pstride) {
     case 4:
       switch (scale->resampler.max_taps) {