The idea was for the suffix to refer to the fact they feature Top Back channels
instead of Top Side, but this distinction is unnecessary given there's no
confusion between back and side like with base level channels (Ls/Rs, Lss/Rss,
Lrs/Rsr), nor known specs where Top Side channels are used without Top Back
also being used.
Signed-off-by: James Almer <jamrial@gmail.com>
In some cases there are compression and resource usage benefits from changing
certain encoder values at runtime over of closing, freeing, allocating and
initializing a whole new encoder. The most obvious case is rate control,
quality settings, and so on. As such, this commit introduces a new function
that attempts to reconfigure an opened encoder with a dictionary of options.
Private options that can be changed are flagged with the runtime AVOption flag.
Global options that can be changed, knowing that each encoder may support some
but not others and as such can't be flagged in the global AVOptions struct,
are signaled the same way through a new field in the FFCodecDefault struct.
An encoder may provide a callback function that will be called for the
reconfiguration process. Simple encoders that can work with only the AVOptions
being reset and don't require any extra steps may just let the default function
be called instead.
Signed-off-by: James Almer <jamrial@gmail.com>
A COMM frame carries both a language and a short content descriptor, so its
only unambiguous metadata key is "comment-<descriptor>-<lang>", while the
extra export of the bare descriptor as a key silently overrides a real tag
whenever the descriptor matches a known tag name such as "album".
Restrict that legacy export to the container-level ID3v2 tag of callers that
ask for it through the new AVFMT_FLAG_LEGACY_ID3V2_COMM_KEYS flag (-fflags
+legacy_id3v2_comm_keys), which is deprecated along with
FF_API_OLD_ID3V2_COMMENT and only exists to give those callers a transition
path.
Decodes the LPCM variant found in DVD-Audio AOB streams. Unlike
DVD-Video LPCM it supports up to 192 kHz sample rates and splits
channels in two channel groups, which may use different quantization.
Samples are grouped in sets of 2 samples over all channels, with the
second channel group's data stored first within each set, as 16-bit
big-endian most significant parts followed by the remaining bits.
Based on information from expired US 6,580,671 patent et al.
Signed-off-by: Kacper Michajłow <kasper93@gmail.com>
Extend the internal CUDA frames context (CUDAFramesContext) to manage
block-linear CUarray surfaces alongside the existing pitched-linear
allocations.
When the frames context format is AV_PIX_FMT_CUARRAY, the caller
(e.g. NVDEC) can fill cuarray_desc and cuarray_num_surfaces before
calling av_hwframe_ctx_init(), which then allocates the CUarray
surfaces.
Also add cuda_transfer_data_from_cuarray() to support hwdownload
from CUarray frames to host memory via cuMemcpy2DAsync.
Co-authored-by: Diego de Souza <ddesouza@nvidia.com>
Signed-off-by: Diego de Souza <ddesouza@nvidia.com>
Add a new hardware pixel format representing opaque block-linear CUDA
arrays (CUarray). This format is used by NVDEC when decoding into
opaque surfaces registered with cuvidRegisterDecodeSurfaces, and can
be consumed directly by NVENC as CUDA array input without requiring
a pitch-linear copy.
Signed-off-by: Diego de Souza <ddesouza@nvidia.com>
Useful for formats where they provide the downmix matrix in the bistream rather
than scale factors for channel groups.
Signed-off-by: James Almer <jamrial@gmail.com>
This allows constraining the set of available backends. This serves as a
better replacement for the "unstable" flag, which is a bit ambiguous. Allows
users to, for example, opt into the memcpy or x86 backend, while excluding
e.g. the upcoming JIT backends.
Signed-off-by: Niklas Haas <git@haasn.dev>
These are needed for interop with e.g. libplacebo, which needs to know the
correct flags to call vkGetDeviceQueue2.
Signed-off-by: Niklas Haas <git@haasn.dev>
It's been replaced with AVStreamGroupLayeredVideo, which is functionally the
same while generic enough to be shared with other kinds of layered video
implementations.
Signed-off-by: James Almer <jamrial@gmail.com>
Carries a raw HEVCDecoderConfigurationRecord for the Dolby Vision
enhancement layer, parsed from the hvcE box (ISOM) or the corresponding
BlockAdditionMapping (Matroska).
av_program_add_stream_index() added in 526efa1053
may fail to carry out its purpose but the lack of
a return value stops callers from catching any error.
Fixed in new function.
This incorrectly lists the libavcodec major version as 60 instead of
62. Also fix the date and commit hash while at it
Fixes: 7faa6ee2aa ("libavformat/matroska: Support smpte 2094-50 metadata")
Signed-off-by: llyyr <llyyr.public@gmail.com>
SMPTE-2094-50 is an upcoming standard that is close to being
finalized.
Define a side data type for carrying this metadata. And add
functions for parsing and writing it. This is very similar to
the handling of HDR10+ metadata.
The spec is available here: https://github.com/SMPTE/st2094-50
Signed-off-by: Vignesh Venkatasubramanian <vigneshv@google.com>
Another step towards a cleaner API, with a cleaner separation of purposes.
Also avoids wasting a whopping one third of the flag space on what really
shouldn't have been a flag to begin with.
I pre-emptively decided to separate the scaler selection between "scaler"
and "scaler_sub", the latter defining what's used for things like 4:2:0
subsampling.
This allows us to get rid of the awkwardly defined SWS_BICUBLIN flag, in favor
of that just being the natural consequence of using a different scaler_sub.
Lastly, I also decided to pre-emptively axe the poorly defined and
questionable SWS_X scaler, which I doubt ever saw much use. The old flag
is still available as a deprecated flag, anyhow.
Sponsored-by: Sovereign Tech Fund
Signed-off-by: Niklas Haas <git@haasn.dev>
Some video codecs are not meant to output frames on their own but to be applied
on top of frames generated by other codecs, as is the case of LCEVC, Dolby Vision,
etc. Add a codec prop to signal this kind of codec, so that library users may know
to not expect a standalone decoder for them to be present.
Signed-off-by: James Almer <jamrial@gmail.com>
It is only used by the MPEG-2 encoder, so replace it
by a private option instead. Use a more elaborate term
for it: intra_dc_precision ("dc" could be anything).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Allows users to test if a given hardware pixel format is supported by swscale.
This is only a rough heuristic anyways, because the actual support may
depend on the specific *combination* of frame attributes, and ultimately
is better served by the `sws_test_frame` and `sws_frame_setup()` APIs anyways.
Sponsored-by: Sovereign Tech Fund
Signed-off-by: Niklas Haas <git@haasn.dev>
Said function has presumably been added in order to check
that we have successfully reset the floating point state
after having violated the ABI/calling convention by not
issuing emms in our MMX DSP routines.
Yet the ability to check this should not have been made public,
because there is no external need for it and because the
function does not even always achieve what its documentation
claims to do: It only works when inline assembly is available.
It should have been implemented in emms.h like emms_c()
(which is where a replacement should be put if there is still
ABI-violating MMX code when av_assert0_fpu() is removed).
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
