Fix deinterlacing for odd height

Originally committed as revision 9942 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/xsubdec.c b/libavcodec/xsubdec.c
index 9a90bf4fdf20765579af38d57b7783331d53bad6..752c23744fd6ced0b81a4aa1b9a750f6f49eebbd 100644 (file)
--- a/libavcodec/xsubdec.c
+++ b/libavcodec/xsubdec.c
@@ -84,7 +84,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *data_size,
     bitmap = sub->rects[0].bitmap;
     for (y = 0; y < h; y++) {
         // interlaced: do odd lines
-        if (y == h / 2) bitmap = sub->rects[0].bitmap + w;
+        if (y == (h + 1) / 2) bitmap = sub->rects[0].bitmap + w;
         for (x = 0; x < w; ) {
             int log2 = ff_log2_tab[show_bits(&gb, 8)];
             int run = get_bits(&gb, 14 - 4 * (log2 >> 1));