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mpeg2: fix slice_vertical_position calculation.

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Make sure to adjust slice_vertical_position if picture structure
is a top or bottom field.
This commit is contained in:
Gwenole Beauchesne 2012-02-23 16:39:14 +01:00
parent 124cd8a3d3
commit f1883b4a4e
1 changed files with 14 additions and 1 deletions
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15
gst-libs/gst/vaapi/gstvaapidecoder_mpeg2.c
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@ -574,12 +574,22 @@ decode_picture_ext(GstVaapiDecoderMpeg2 *decoder, guchar *buf, guint buf_size)
{
GstVaapiDecoderMpeg2Private * const priv = decoder->priv;
GstMpegVideoPictureExt * const pic_ext = &priv->pic_ext;
GstVaapiPicture * const picture = priv->current_picture;
if (!gst_mpeg_video_parse_picture_extension(pic_ext, buf, buf_size, 0)) {
GST_DEBUG("failed to parse picture-extension");
return GST_VAAPI_DECODER_STATUS_ERROR_BITSTREAM_PARSER;
}
priv->has_pic_ext = TRUE;
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);
break;
case GST_MPEG_VIDEO_PICTURE_STRUCTURE_BOTTOM_FIELD:
GST_VAAPI_PICTURE_FLAG_SET(picture, GST_VAAPI_PICTURE_FLAG_BOTTOM_FIELD);
break;
}
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
@ -700,7 +710,10 @@ decode_slice(
}
macroblock_offset = gst_bit_reader_get_pos(&br);
mb_y = slice_no;
mb_y = slice_no << !GST_VAAPI_PICTURE_IS_FRAME(picture);
if (GST_VAAPI_PICTURE_IS_BOTTOM_FIELD(picture))
mb_y++;
mb_x = -1;
do {
if (!decode_vlc(&br, &mb_inc, mpeg2_mbaddr_vlc_table,