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Decoder: Detect change of mbaff flag in SPS

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Change in Mbaff flag needs re-initialization of NMB group
and other variables in decoder context.

Bug: 64380237
Test: ran poc on ASAN before/after
Change-Id: I0fc65e4dfc3cc2c15528ec52da1782ecec61feab
This commit is contained in:
Hamsalekha S 2017-08-09 13:41:39 +05:30 • committed by Ray Essick
parent 6a09a35355
commit d524ba0310
1 changed files with 12 additions and 2 deletions
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14
decoder/ih264d_parse_headers.c
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@ -479,7 +479,7 @@ WORD32 ih264d_parse_sps(dec_struct_t *ps_dec, dec_bit_stream_t *ps_bitstrm)
{
UWORD8 i;
dec_seq_params_t *ps_seq = NULL;
UWORD8 u1_profile_idc, u1_level_idc, u1_seq_parameter_set_id;
UWORD8 u1_profile_idc, u1_level_idc, u1_seq_parameter_set_id, u1_mb_aff_flag = 0;
UWORD16 i2_max_frm_num;
UWORD32 *pu4_bitstrm_buf = ps_bitstrm->pu4_buffer;
UWORD32 *pu4_bitstrm_ofst = &ps_bitstrm->u4_ofst;
@ -802,10 +802,20 @@ WORD32 ih264d_parse_sps(dec_struct_t *ps_dec, dec_bit_stream_t *ps_bitstrm)
COPYTHECONTEXT("SPS: frame_mbs_only_flag", u1_frm);
if(!u1_frm)
u1_mb_aff_flag = ih264d_get_bit_h264(ps_bitstrm);
if((ps_dec->i4_header_decoded & 1)
&& (ps_seq->u1_mb_aff_flag != u1_mb_aff_flag))
{
ps_dec->u1_res_changed = 1;
return IVD_RES_CHANGED;
}
if(!u1_frm)
{
u2_pic_ht <<= 1;
ps_seq->u1_mb_aff_flag = ih264d_get_bit_h264(ps_bitstrm);
ps_seq->u1_mb_aff_flag = u1_mb_aff_flag;
COPYTHECONTEXT("SPS: mb_adaptive_frame_field_flag",
ps_seq->u1_mb_aff_flag);