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videopool: improve alignment

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Align each plane instead of each component, we might otherwise apply the
alignment adjustement twice if a plane contains multiple components.
This commit is contained in:
Wim Taymans 2012-08-20 10:03:09 +02:00
parent 2bffebcb02
commit ca77174f91
1 changed files with 20 additions and 14 deletions
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34
gst-libs/gst/video/gstvideopool.c
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@ -101,7 +101,7 @@ gst_video_info_align (GstVideoInfo * info, GstVideoAlignment * align)
const GstVideoFormatInfo *vinfo = info->finfo;
gint width, height;
gint padded_width, padded_height;
gint i, n_comp;
gint i, n_planes;
width = GST_VIDEO_INFO_WIDTH (info);
height = GST_VIDEO_INFO_HEIGHT (info);
@ -119,24 +119,30 @@ gst_video_info_align (GstVideoInfo * info, GstVideoAlignment * align)
info->width = width;
info->height = height;
n_comp = GST_VIDEO_INFO_N_COMPONENTS (info);
n_planes = GST_VIDEO_INFO_N_PLANES (info);
if (GST_VIDEO_FORMAT_INFO_HAS_PALETTE (vinfo))
n_comp--;
n_planes--;
/* FIXME, not quite correct, NV12 would apply the vedge twice on the second
* plane */
for (i = 0; i < n_comp; i++) {
gint vedge, hedge, plane;
for (i = 0; i < n_planes; i++) {
gint vedge, hedge, comp;
hedge = GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (vinfo, i, align->padding_left);
vedge = GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (vinfo, i, align->padding_top);
plane = GST_VIDEO_FORMAT_INFO_PLANE (vinfo, i);
/* Find the component for this plane, FIXME, we assume the plane number and
* component number is the same for now, for scaling the dimensions this is
* currently true for all formats but it might not be when adding new
* formats. We might need to add a plane subsamling in the format info to
* make this more generic or maybe use a plane -> component mapping. */
comp = i;
GST_DEBUG ("plane %d: hedge %d vedge %d align %d stride %d", plane, hedge,
vedge, align->stride_align[i], info->stride[plane]);
hedge =
GST_VIDEO_FORMAT_INFO_SCALE_WIDTH (vinfo, comp, align->padding_left);
vedge =
GST_VIDEO_FORMAT_INFO_SCALE_HEIGHT (vinfo, comp, align->padding_top);
info->offset[plane] += (vedge * info->stride[plane]) +
(hedge * GST_VIDEO_FORMAT_INFO_PSTRIDE (vinfo, i));
GST_DEBUG ("plane %d: comp: %d, hedge %d vedge %d align %d stride %d", i,
comp, hedge, vedge, align->stride_align[i], info->stride[i]);
info->offset[i] += (vedge * info->stride[i]) +
(hedge * GST_VIDEO_FORMAT_INFO_PSTRIDE (vinfo, comp));
}
}