These functions have a terrible design, let us fix them before extending
them.
First design mistake: no error code. A helper function for testing
memory allocation failure where AVERROR(ENOMEM) does not appear is
absurd.
Second design mistake: printing a message. Return the error code, let
the caller print the error message.
Third design mistake: hard-coded use of goto.
http://ffmpeg.org/pipermail/ffmpeg-devel/2020-May/262544.html
Signed-off-by: Limin Wang <lance.lmwang@gmail.com>
Use opaque iteration state instead of the previous child class. This
mirrors similar changes done in lavf/lavc.
Deprecate the av_opt_child_class_next() API.
make checkheaders will get error as follow:
CC libavutil/hwcontext_vulkan.h.o
In file included from libavutil/hwcontext_vulkan.h.c:1:
./libavutil/hwcontext_vulkan.h:130:23: error: ‘AV_NUM_DATA_POINTERS’ undeclared here (not in a function)
130 | void *alloc_pnext[AV_NUM_DATA_POINTERS];
| ^~~~~~~~~~~~~~~~~~~~
./libavutil/hwcontext_vulkan.h:199:43: warning: ‘enum AVPixelFormat’ declared inside parameter list will not be visible outside of this definition or declaration
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>
We want to copy the lowest amount of bytes per line, but while the buffer
stride is sanitized, the src/dst stride can be negative, and negative numbers
of bytes do not make a lot of sense.
The size of a single allocation performed by av_malloc() or av_realloc()
is supposed to be bounded by max_alloc_size, which defaults to INT_MAX
and can be set by the user; yet currently this is not completely
honoured: The actual value used is max_alloc_size - 32. How this came
to be can only be understood historically:
a) 0ecca7a49f disallowed allocations
> INT_MAX. At that time the size parameter of av_malloc() was an
unsigned and the commentary added ("lets disallow possible ambiguous
cases") indicates that this was done as a precaution against calling the
functions with negative int values. Genuinely limiting the size of
allocations to INT_MAX doesn't seem to have been the intention given
that at this time the memalign hack introduced in commit
da9b170c6f (which when enabled increased
the size of allocations slightly so that one can return a correctly
aligned pointer that actually does not point to the beginning of the
allocated buffer) was already present.
b) Said memalign hack allocated 17 bytes more than actually desired, yet
allocating 16 bytes more is actually enough and so this was changed in
a9493601638b048c44751956d2360f215918800c; this commit also replaced
INT_MAX by INT_MAX - 16 (and made the limit therefore a limit on the size
of the allocated buffer), but kept the comment, although there is nothing
ambiguous about allocating (INT_MAX - 16)..INT_MAX.
c) 13dfce3d44 then increased 16 to 32 for
AVX, 6b4c0be558 replaced INT_MAX by
MAX_MALLOC_SIZE (which was of course defined to be INT_MAX) and
5a8e994287 added max_alloc_size and made
it user-selectable.
d) 4fb311c804 then dropped the memalign
hack, yet it kept the -32 (probably because the comment about ambiguous
cases was still present?), although it is no longer needed at all after
this commit. Therefore this commit removes it and uses max_alloc_size
directly.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This was never actually used, likely due to confusion, as the device context
also had one used for uploads and downloads.
Also, since we're only using it for very quick image barriers (which are
practically free on all hardware), use the compute queue instead of the
transfer queue.
This commit makes full use of the enabled queues to provide asynchronous
uploads of images (downloads remain synchronous).
For a pure uploading use cases, the performance gains can be significant.
With this, the puzzle of making libplacebo, ffmpeg and any other Vulkan
API users interoperable is complete.
Users of both libraries can initialize one another's contexts without having
to create a new one.
This allows for users who derive devices to set options for the
new device context they derive.
The main use case of this is to allow users to enable extensions
(such as surface drawing extensions) in Vulkan while deriving from
the device their frames are on. That way, users don't need to write
any initialization code themselves, since the Vulkan spec invalidates
mixing instances, physical devices and active devices.
Apart from Vulkan, other hwcontexts ignore the opts argument since they
don't support options at all (or in VAAPI and OpenCL's case, options are
currently only used for device selection, which device_derive overrides).
This will be used for AVCodecContext->profile. By specifying constants in the
encoders we won't have to use the common AVCodecContext options table and
different encoders can use the same profile name even with different values.
Signed-off-by: Marton Balint <cus@passwd.hu>
Enables HEVC Range Extension decoding support (Linux) for 4:2:2 8/10 bit
on ICL+ (gen11 +) platform.
Restricted to linux only for now.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
Many places are using their own custom code for handling overflow
around timestamps or other int64_t values. There are enough of these
now that having some common saturated math functions seems sound.
Signed-off-by: Dale Curtis <dalecurtis@chromium.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
On windows and darwin (and modern android), the x18 register is reserved
and shouldn't be modified by user code, while it is freely available on
linux. Strictly avoid it, to keep the assembly code portable.
This would have helped catch the issue fixed in 872790b1f9
immediately.
Signed-off-by: Martin Storsjö <martin@martin.st>
Only warn instead. API users can find out which extensions were unavailable
by using the enabled_inst_extensions and enabled_dev_extensions fields.
This eliminates having to trial-and-error to find which extensions were missing.
Due to our AVHWDevice infrastructure, where API users are offered a way
to derive contexts rather than always create new one, our filterchains,
being supported by a single hardware device context, can grow to considerable
size.
Hence, in such situations, using the maximum amount of queues the device offers
can be benefitial to eliminating bottlenecks where queue submissions on the
same family have to wait for the previous one to finish.
This is intended to replace the deprecated the AV_FRAME_DATA_QP_TABLE*
API and extend it to a wider range of codecs.
In the future, it may also be extended to support other encoding
parameters such as motion vectors.
Additional changes by Anton Khirnov <anton@khirnov.net> with suggestions
by Lynne <dev@lynne.ee>.
Signed-off-by: Juan De León <juandl@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Anton Khirnov <anton@khirnov.net>
This reverts commit 97b526c192.
It broke the API, and assumed no other APIs used multiple semaphores.
This also disallowed certain optimizations to happen.
Dealing with APIs that give or expect single semaphores is easier when
we use per-image semaphores.
Limin Wang
Fei Wang
Anton Khirnov
Michael Niedermayer
Dale Curtis
James Almer
Jun Zhao
Lynne
Andreas Rheinhardt
Nicolas George
Marton Balint
Linjie Fu
Martin Storsjö
Juan De León