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decoder: hevc: Fill dependent slice segment headers while parsing

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Copy the data into the dependent slice segment header from the
corresponding independent slice segment header during parsing.

Previously the reference to the "previous" independent header was
held through the parsing phase and then dereferenced during the
decoding phase. This caused all dependent headers to be populated
with the data of the AU's last independent header instead of the
proper corresponding header.

https://bugzilla.gnome.org/show_bug.cgi?id=762352

Changes since v1:
- Reworded commit message
This commit is contained in:
Scott D Phillips 2016-02-23 10:55:02 +02:00 committed by Sreerenj Balachandran
parent 6034734d73
commit ffd5028a38
1 changed files with 18 additions and 18 deletions
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36
gst-libs/gst/vaapi/gstvaapidecoder_h265.c
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@ -1601,18 +1601,10 @@ init_picture_refs (GstVaapiDecoderH265 * decoder,
memset (priv->RefPicList1, 0, sizeof (GstVaapiPictureH265 *) * 16);
priv->RefPicList0_count = priv->RefPicList1_count = 0;
if (slice_hdr->dependent_slice_segment_flag) {
GstH265SliceHdr *tmp = &priv->prev_independent_slice_pi->data.slice_hdr;
num_ref_idx_l0_active_minus1 = tmp->num_ref_idx_l0_active_minus1;
num_ref_idx_l1_active_minus1 = tmp->num_ref_idx_l1_active_minus1;
ref_pic_list_modification = &tmp->ref_pic_list_modification;
type = tmp->type;
} else {
num_ref_idx_l0_active_minus1 = slice_hdr->num_ref_idx_l0_active_minus1;
num_ref_idx_l1_active_minus1 = slice_hdr->num_ref_idx_l1_active_minus1;
ref_pic_list_modification = &slice_hdr->ref_pic_list_modification;
type = slice_hdr->type;
}
num_ref_idx_l0_active_minus1 = slice_hdr->num_ref_idx_l0_active_minus1;
num_ref_idx_l1_active_minus1 = slice_hdr->num_ref_idx_l1_active_minus1;
ref_pic_list_modification = &slice_hdr->ref_pic_list_modification;
type = slice_hdr->type;
/* decoding process for reference picture list construction needs to be
* invoked only for P and B slice */
@ -2434,7 +2426,6 @@ fill_slice (GstVaapiDecoderH265 * decoder,
GstVaapiPictureH265 * picture, GstVaapiSlice * slice,
GstVaapiParserInfoH265 * pi, GstVaapiDecoderUnit * unit)
{
GstVaapiDecoderH265Private *const priv = &decoder->priv;
VASliceParameterBufferHEVC *const slice_param = slice->param;
GstH265SliceHdr *slice_hdr = &pi->data.slice_hdr;
@ -2455,11 +2446,6 @@ fill_slice (GstVaapiDecoderH265 * decoder,
COPY_LFF (dependent_slice_segment_flag);
/* use most recent independent slice segment header syntax elements
* for filling the missing fields in dependent slice segment header */
if (slice_hdr->dependent_slice_segment_flag)
slice_hdr = &priv->prev_independent_slice_pi->data.slice_hdr;
COPY_LFF (mvd_l1_zero_flag);
COPY_LFF (cabac_init_flag);
COPY_LFF (collocated_from_l0_flag);
@ -2731,6 +2717,18 @@ ensure_decoder (GstVaapiDecoderH265 * decoder)
return GST_VAAPI_DECODER_STATUS_SUCCESS;
}
static void
populate_dependent_slice_hdr (GstVaapiParserInfoH265 * pi,
GstVaapiParserInfoH265 * indep_pi)
{
GstH265SliceHdr *slice_hdr = &pi->data.slice_hdr;
GstH265SliceHdr *indep_slice_hdr = &indep_pi->data.slice_hdr;
memcpy (&slice_hdr->type, &indep_slice_hdr->type,
offsetof (GstH265SliceHdr, num_entry_point_offsets) -
offsetof (GstH265SliceHdr, type));
}
static GstVaapiDecoderStatus
gst_vaapi_decoder_h265_parse (GstVaapiDecoder * base_decoder,
GstAdapter * adapter, gboolean at_eos, GstVaapiDecoderUnit * unit)
@ -2928,6 +2926,8 @@ gst_vaapi_decoder_h265_parse (GstVaapiDecoder * base_decoder,
if (!pi->data.slice_hdr.dependent_slice_segment_flag)
gst_vaapi_parser_info_h265_replace (&priv->prev_independent_slice_pi,
pi);
else
populate_dependent_slice_hdr (pi, priv->prev_independent_slice_pi);
break;
default:
/* Fix */