The fate test reference changes are due to the conversion being a simple
lossless deinterleave, instead of going through a RGB -> YUV -> RGB roundtrip.
Signed-off-by: James Almer <jamrial@gmail.com>
This commit also reduces the number of times ff_sws_init_scale() gets
called (only once per bit depth), and the number of times randomize_buffers()
gets called (only if the function must be checked).
Benchmarks are only performed on bit depths 8 and 16 (since they are
different functions, and not only different constants).
Reduce input sizes to 8 (to test that the function works with widths
smaller than the vector length) and 1920 (raising the largest input
size to improve benchmark results).
And preserve the public SwsContext as separate name. The motivation here
is that I want to turn SwsContext into a public struct, while keeping the
internal implementation hidden. Additionally, I also want to be able to
use multiple internal implementations, e.g. for GPU devices.
This commit does not include any functional changes. For the most part, it is
a simple rename. The only complications arise from the public facing API
functions, which preserve their current type (and hence require an additional
unwrapping step internally), and the checkasm test framework, which directly
accesses SwsInternal.
For consistency, the affected functions that need to maintain a distionction
have generally been changed to refer to the SwsContext as *sws, and the
SwsInternal as *c.
In an upcoming commit, I will provide a backing definition for the public
SwsContext, and update `sws_internal()` to dereference the internal struct
instead of merely casting it.
Sponsored-by: Sovereign Tech Fund
Signed-off-by: Niklas Haas <git@haasn.dev>
This helps detecting inconsistencies in swscale input/output code and
a av_read_image_line()/av_write_image_line() pass.
Signed-off-by: James Almer <jamrial@gmail.com>
Ensure those bits are copied, which will result in the output being the same as
the input, where swscale set them to the equivalent of fully opaque.
Signed-off-by: James Almer <jamrial@gmail.com>
This made the output non binary reproducible across different versions of
zlib.
This reverts commit bce5855afb.
Signed-off-by: James Almer <jamrial@gmail.com>
The demuxer's 'missing_streams' private option is used to communicate
information from the demuxer to avformat_find_stream_info(). However,
that is not only unnecessarily complicated, it also leaks internal
information to users, e.g. this option appears in the results of the
fate-flv-demux test.
Use a new field in FFFormatContext to communicate this information
instead.
stddev and PSNR values change by the removal of format conversion and because
of the added sws_flags. Either or will have the same effect even on their own.
Signed-off-by: James Almer <jamrial@gmail.com>
This format is useful for doing certain lossless transforms on images,
RCT in particular, which require you to escalate the size from 16 to
32 bits to avoid overflows.
APIchanges will be done alongside when comitting.
FATE results differ when using the original zlib and zlib-ng.
Since we don't need to test the result from zlib itself, this commit
disables compression on tests for zlib-based codecs, which ends up
giving the same results with both libraries.
Signed-off-by: James Almer <jamrial@gmail.com>
Osamu Watanabe
James Almer
Peter Ross
Zhao Zhili
Ramiro Polla
Niklas Haas
Emily
Anton Khirnov
Lynne
Martin Schitter