According to 7.3.6.1, use_integer_mv_flag should be parsed if
motion_vector_resolution_control_idc equals to 2.
Otherwise wrong parameters in the subsequent parsing procedures
would be got.
Signed-off-by: Linjie Fu <linjie.justin...@gmail.com>
---
libavcodec/hevcdec.c | 8 ++++++++
libavcodec/hevcdec.h | 1 +
2 files changed, 9 insertions(+)
diff --git a/libavcodec/hevcdec.c b/libavcodec/hevcdec.c
index 8194f18..fc8a77d 100644
--- a/libavcodec/hevcdec.c
+++ b/libavcodec/hevcdec.c
@@ -788,6 +788,14 @@ static int hls_slice_header(HEVCContext *s)
sh->max_num_merge_cand);
return AVERROR_INVALIDDATA;
}
+
+ // Syntax in 7.3.6.1
+ if (s->ps.sps->motion_vector_resolution_control_idc == 2)
+ sh->use_integer_mv_flag = get_bits1(gb);
+ else
+ // Inferred to be equal to
motion_vector_resolution_control_idc if not present
+ sh->use_integer_mv_flag =
s->ps.sps->motion_vector_resolution_control_idc;
+
}
sh->slice_qp_delta = get_se_golomb(gb);
diff --git a/libavcodec/hevcdec.h b/libavcodec/hevcdec.h
index 6e22e04..1164af2 100644
--- a/libavcodec/hevcdec.h
+++ b/libavcodec/hevcdec.h
@@ -302,6 +302,7 @@ typedef struct SliceHeader {
int tc_offset; ///< tc_offset_div2 * 2
unsigned int max_num_merge_cand; ///< 5 - 5_minus_max_num_merge_cand
+ uint8_t use_integer_mv_flag;
unsigned *entry_point_offset;
int * offset;
--
2.7.4
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