Coverity scan:
Logically dead code: The indicated dead code may have performed some
action; that action will never occur.
By using pointer arithmetic is impossible to get NULL.
Coverity scan bug:
Dereference after null check: Either the check against null is
unnecessary, or there may be a null pointer dereference.
While looking for hte lowest poc, according to rest of the code, the
picture in the dbp (decoded picture buffer) might be NULL, thus we
could check for a NULL picture before assigned as found.
Also, split a comma operator because it is considered as a bad
practice because it possible side effects.
Coverity scan bug:
Scalars (for example, integers) are not properly
bounds-checked (sanitized) before being used as array or pointer
indexes, loop boundaries, or function arguments are considered as
tainted.
In this case, num_nals were not checked before used as loop control.
Clear decoders out on a flush but keep the same instance,
rather than completely recreating them. That avoids
unecessarily freeing and recreating surface pools
and contexts, which can be quite expensive
https://bugzilla.gnome.org/show_bug.cgi?id=781142
Configuring GCC to verify possible usage of uninitialized variables,
shows that found_index might be used without previous assignation.
This patch assigns a initial value to found_index, also avoid a
branching when returning the result value.
https://bugzilla.gnome.org/show_bug.cgi?id=778782
Without this, all dpb pictures are not released during flush,
because we used the global dpb_count variable for checking the
dpb fullness which get decremented in dpb_remove_index()
routine during each loop iteration.
https://bugzilla.gnome.org/show_bug.cgi?id=767934
The array_completeness, reserved bit and num_nal_units fields
in HEVCDecoderConfigurationRecord will be present for each VPS/SPS/PPS array list,
but not for each occurance of similar headers.
https://bugzilla.gnome.org/show_bug.cgi?id=764274
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
Only supporting vaapidecode ! vaapisink combination for now.
Missing dependencies:
1: No support for P010 video format in GStreamer
2: No support for P010 vaGetImage()/vaPutimage() in vaapi-intel-driver
3: As a result of 1&2 , we have no support for Vaapi Video memory mapping
through GstVideoMeta.
Right now we only set chroma format (YUV420 with more than 8 bits per channel)
for surface pool and keeping GST_VIDEO_FORMAT as ENCODED. The underlying format
of the surfaces is implementation (driver) defined, which is P010.
Explicit flushing of dpb for EOS and EOB nal decoding is wrong,
the dpb_add() itself will handle the flusing(if needed) of dpb
for end of sequence and end of bitstream.
https://bugzilla.gnome.org/show_bug.cgi?id=754010
This fix is based on the V3 vesion of spec which was missing in older versions.
When the current picture has PicOutputFlag equal to 1, for each picture in the
DPB that is marked as "needed for output" and follows the current picture in output order,
the associated variable PicLatencyCount is set equal to PicLatencyCount + 1 (C.5.2.3).
https://bugzilla.gnome.org/show_bug.cgi?id=754010
The default scan order of scaling lists are up-right-diagonal
as per hevc specification. Use the newly implemented
uprightdiagonal_to_raster conversion codecparser APIs to
get the the scaling_list values in raster order, which is
what the VA intel driver requires.
This is necessary for finding ChromaOffsetL0/ChromaOffsetL1
prediction weight table values with out using any hard coding.
Fixme: We don't have parser API for sps_range_extension, so
assumed zero value for high_precision_offsets_enabled_flag.
Signed-off-by: Sreerenj Balachandran <sreerenj.balachandran@intel.com>
Based on ITU-T rec H265(4/2015): 7-56
This was a wrong equation in rec H265 (4/2013): 7-44...
Signed-off-by: Sreerenj Balachandran <sreerenj.balachandran@intel.com>
HACK: This is a work-around to identify some main profile streams having wrong profile_idc.
There are some wrongly encoded main profile streams(eg: ENTP_C_LG_3.bin) which doesn't
have any of the profile_idc values mentioned in Annex-A, instead general_profile_idc
has been set as zero and having general_profile_compatibility_flag[general_profile_idc]
is TRUE. Assuming them as MAIN profile for now.
https://bugzilla.gnome.org/show_bug.cgi?id=753226
Signed-off-by: Sreerenj Balachandran <sreerenj.balachandran@intel.com>
We are calculating the dpb size based on max_dec_pic_buffering.
But if there are more than one temporal sublayers, we are supposed
to use the max_dec_pic_buffering[max_sub_layers_minus] for dpb
size calculation (Assuming HighestTid as max_sub_layers_minus).
Sample streams: TSCL_A_VIDYO_5.bin, TSCL_B_VIDYO_4.bin
https://bugzilla.gnome.org/show_bug.cgi?id=753226
Signed-off-by: Sreerenj Balachandran <sreerenj.balachandran@intel.com>
Decoding process for reference picture list construction needs to be
invoked only for P and B slice and the value for slice_type of dependent slice
segment should be taken from the previous independent slice segment header
of the same pic.
https://bugzilla.gnome.org/show_bug.cgi?id=753226
Signed-off-by: Sreerenj Balachandran <sreerenj.balachandran@intel.com>
Based up on the value of uniform_spacing_flag in Picture Parameter Set,
the tile column width and tile row height should be calculated.
Equations: 6-1, 6-2
Tiled video Descriptions: 7.3.2.3, 7.4.3.3
-- Set NoRaslOutputFlag based on EOS and EOB Nal units
-- Fix PicOutputFlag setting for RASL picture
-- Fix prev_poc_lsb/prev_poc_msb calculation
-- Drop the RASL frames if NoRaslOutputFlag is TRUE for the associated IRAP picture
-- Fixed couple of crashes and added cosmetics
