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videopool: improve alignment

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Check the alignment of the strides in gst_video_info_align and increase the
padding on the frame until the strides are aligned.
This commit is contained in:
Wim Taymans 2012-08-20 10:16:59 +02:00
parent ca77174f91
commit f56e1222da
1 changed files with 22 additions and 3 deletions
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25
gst-libs/gst/video/gstvideopool.c
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@ -102,6 +102,7 @@ gst_video_info_align (GstVideoInfo * info, GstVideoAlignment * align)
gint width, height;
gint padded_width, padded_height;
gint i, n_planes;
gboolean aligned;
width = GST_VIDEO_INFO_WIDTH (info);
height = GST_VIDEO_INFO_HEIGHT (info);
@ -113,13 +114,31 @@ gst_video_info_align (GstVideoInfo * info, GstVideoAlignment * align)
padded_width = width + align->padding_left + align->padding_right;
padded_height = height + align->padding_top + align->padding_bottom;
gst_video_info_set_format (info, GST_VIDEO_INFO_FORMAT (info),
padded_width, padded_height);
n_planes = GST_VIDEO_INFO_N_PLANES (info);
do {
GST_LOG ("padded dimension %u-%u", padded_width, padded_height);
gst_video_info_set_format (info, GST_VIDEO_INFO_FORMAT (info),
padded_width, padded_height);
/* check alignment */
aligned = TRUE;
for (i = 0; i < n_planes; i++) {
GST_LOG ("plane %d, stride %d, alignment %u", i, info->stride[i],
align->stride_align[i]);
aligned &= (info->stride[i] & align->stride_align[i]) == 0;
}
if (aligned)
break;
GST_LOG ("unaligned strides, increasing dimension");
/* increase padded_width */
padded_width += padded_width & ~(padded_width - 1);
} while (!aligned);
info->width = width;
info->height = height;
n_planes = GST_VIDEO_INFO_N_PLANES (info);
if (GST_VIDEO_FORMAT_INFO_HAS_PALETTE (vinfo))
n_planes--;