That's the value of NumDeltaPocs[RefRpsIdx] and we might be able to derive
the value from given sps and slice header.
Because well known hardware implementations refer to the value, however,
storing the value makes things easier.
Following is the list of hardware implementations
* DXVA2: ucNumDeltaPocsOfRefRpsIdx
* NVDEC/VDPAU: NumDeltaPocsOfRefRpsIdx
The calculated size of short_term_ref_pic_set is not a part of
HEVC syntax but the value is used by some stateless decoders
(e.g., vaapi, dxva, vdpau and nvdec) for the purpose of skipping
parsing the syntax by the accelerator.
3-byte emulation bytes can confuse the current code that skips
bits at the end of an SEI. Use a simpler method that's also
quicker because it skips all remaining bits in one go instead
of 1 bit at a time.
"High Throughput", "Multiview", "Scalable", "3D", "Screen Content Coding",
and "Scalable format range extensions" profiles can be supported
via h265parser APIs now.
The same timing_info will be present at vps or vui.
When the timeing_info is present in the VPS, vui_timing_info
, when present, shall be equal to vps_timing_info, and when
not present, is inferred to be equal to vps_timing_info.
* Add FIXME for future correction of HRDParames parsing.
Spec. defines that the number of HRDParames could be up to
"vps_num_layer_sets_minus1 + 1" (i.e., 1024).
* Add parsing vps_base_layer_{internal,available}_flag.
* Fix possible invalid vps_extension parsing.
Fixes#798
Those fields have been introduced in version 2 and later to define new
profiles like the format range extensions profiles (A.3.5).
NOTE: This patch breaks the parser ABI, rebuild needed.
https://bugzilla.gnome.org/show_bug.cgi?id=793876
We used to have the same enum to represent H265 profiles and idc values.
Those are no longer the same with extension profiles defined from
version 2 of the spec.
Split those enums so the semantic of each is clearer and we'll be able
to add extension profiles to GstH265Profile.
Also add gst_h265_profile_tier_level_get_profile() to retrieve the
GstH265Profile from the GstH265ProfileTierLevel. It will be used to
implement the detection of extension profiles.
https://bugzilla.gnome.org/show_bug.cgi?id=793876
H.265 7.4.7.1 says:
> When slice_deblocking_filter_disabled_flag is not present, it is
> inferred to be equal to pps_deblocking_filter_disabled_flag.
https://bugzilla.gnome.org/show_bug.cgi?id=762351
Initialize to 0 these parse structures before filling them: GstH265SEIMessage,
GstH265NalUnit, GstH265VPS, GstH265PPS, GstH265SPS and GstH265SliceHdr.
When calling the functions which fill those structures, they may fail, leaving
unitialized those structures. This situation may lead to future problems, such
as a segmentation fault when freeing, for example.
This patch initializes to zero these structures, before filling them.
https://bugzilla.gnome.org/show_bug.cgi?id=755161
If short_term_ref_pic_set_sps_flag is FALSE, the ShortTermRefPicSet
structure is supposed to derive from slice header. Which means,
CurrRpsIdx is equal to num_short_term_ref_pic_sets. But the number
of refpicsets communicated via sps header is only num_short_term_ref_pic_sets - 1.
And we are using slice_header structure to reference the last entry, which is
ShortTermRefPicSet[num_short_term_ref_pic_sets].
https://bugzilla.gnome.org/show_bug.cgi?id=754834
Section 6.5.1: Coding tree block raster and tile scanning conversion process
Follow the equations 6-3 and 6-4
This will provide correct offset_max in slice_header for parsing
num_entry_point_offsets.
https://bugzilla.gnome.org/show_bug.cgi?id=754024
Signed-off-by: Sreerenj Balachandran <sreerenj.balachandran@intel.com>
As per 7-42 and 7-43 the ScalingFactor's scanIdx is 0,
which is "up-right-diagonal" scan. Add APIs for converting
up-right-diagonal to raster and vise versa.
https://bugzilla.gnome.org/show_bug.cgi?id=754024
Being more strict on specification, According to 7.4.7.3,
delta_chroma_log2_weight_denom should be in the range of
[(0 - luma_log2_weight_denom), (7 - luma_log2_weight_denom)]
https://bugzilla.gnome.org/show_bug.cgi?id=754024
ChromaLog2WeightDenom = luma_log2_weight_denom + delta_chroma_log2_weight_denom
The value of ChromaLog2WeightDenom should be in the range of 0 to 7 and
the value luma_log2_weight_denom should be also in the range of 0 to 7.
Which means , delta_chroma_log2_weight_denom can have values in the range
between -7 and 7.
https://bugzilla.gnome.org/show_bug.cgi?id=753552
The EOS and EOB nals have the size 2 which is the size of
nal unit header itself. The gst_h265_parser_identify_nalu()
is not required to scan start code again in this case.
In other cases, for a valid nalunit the minimum required size
is 3 bytes (2 byte header and at least 1 byte RBSP payload)
Skip the byte alignment bits as per the logic of byte_alignment()
provided in hevc specification. This will fix the calculation of
slice header size.
https://bugzilla.gnome.org/show_bug.cgi?id=747613
READ_UE_ALLOWED was almost exclusively used with min == 0, which doesn't
make much point for unsigned integers.
Add a READ_UE_MAX variant and use that instead. Also replaced two usages
of CHECK_ALLOWED (a,0,something) by CHECK_ALLOWED_MAX (a, something)
