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mpeg2: catch incorrect picture_structure from bitstreams.

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Assume "frame" picture structure if the syntax element was zero or if
progressive_frame is set.
This commit is contained in:
Gwenole Beauchesne 2012-02-24 12:56:48 +01:00
parent 8bbe22f831
commit 10dfc67cca
1 changed files with 8 additions and 0 deletions
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8
gst-libs/gst/vaapi/gstvaapidecoder_mpeg2.c
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@ -582,6 +582,14 @@ decode_picture_ext(GstVaapiDecoderMpeg2 *decoder, guchar *buf, guint buf_size)
}
priv->has_pic_ext = TRUE;
if (pic_ext->picture_structure == 0 ||
(pic_ext->progressive_frame &&
pic_ext->picture_structure != GST_MPEG_VIDEO_PICTURE_STRUCTURE_FRAME)) {
GST_WARNING("invalid picture_structure %d, replacing with \"frame\"",
pic_ext->picture_structure);
pic_ext->picture_structure = GST_MPEG_VIDEO_PICTURE_STRUCTURE_FRAME;
}
switch (pic_ext->picture_structure) {
case GST_MPEG_VIDEO_PICTURE_STRUCTURE_TOP_FIELD:
GST_VAAPI_PICTURE_FLAG_SET(picture, GST_VAAPI_PICTURE_FLAG_TOP_FIELD);