| Commit message (Collapse) | Author | Age | Files | Lines |
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Change all OPT_* macros such that they don't define the entire m_option
initializer, and instead expand only to a part of it, which sets certain
fields. This requires changing almost every option declaration, because
they all use these macros. A declaration now always starts with
{"name", ...
followed by designated initializers only (possibly wrapped in macros).
The OPT_* macros now initialize the .offset and .type fields only,
sometimes also .priv and others.
I think this change makes the option macros less tricky. The old code
had to stuff everything into macro arguments (and attempted to allow
setting arbitrary fields by letting the user pass designated
initializers in the vararg parts). Some of this was made messy due to
C99 and C11 not allowing 0-sized varargs with ',' removal. It's also
possible that this change is pointless, other than cosmetic preferences.
Not too happy about some things. For example, the OPT_CHOICE()
indentation I applied looks a bit ugly.
Much of this change was done with regex search&replace, but some places
required manual editing. In particular, code in "obscure" areas (which I
didn't include in compilation) might be broken now.
In wayland_common.c the author of some option declarations confused the
flags parameter with the default value (though the default value was
also properly set below). I fixed this with this change.
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Obviously, we don't want to lose fractions, and the zimg active_region
fields in fact have the type double. The integer division was wrong.
Also, always set active_region.width/height. It appears zimg behavior
does not change if they're set to the normal integer values, so the
extra check to not set them in this case was worthless.
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As suggested by the zimg author: active_region is not supported on
outputs (and the API returns an error), so instead scale to the "full"
surface, but adjust the source rectangle such that the cropped output
image happens to cover the correct region.
Does this even work? Since Balmer Peak doesn't work, I can't really say,
but it seems to look correct.
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Also remove the "o" case, which was never implemented (probably was an
idea to output alpha formats, now obsoleted by zimg's full alpha
support).
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Some pngs are paletted, so this is vaguely interesting.
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This was a confusing name, because 1. there's also a z_planes[] field,
and 2. it was not specific to zimg indexes.
Possibly there used to be an idea involved about supporting alpha to
non-alpha formats by discarding the alpha plane, but zimg does this now
(and zimg will correctly blend the alpha component too).
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The special thing about this format is
1. mpv assigns the component ID 4 to alpha, and component IDs 2 and 3
are not present, which causes some messy details.
2. zimg always wants the alpha plane as plane 3, and plane 1 and 2 are
not present, while FFmpeg/mpv put the alpha plane as plane 1.
In theory, 2. could be avoided, since FFmpeg actually doesn't have a any
2 plane formats (alpha is either packed, or plane 3). But having to skip
"empty" planes would break expectations.
zplanes is not equivalent to the mpv plane count (actually it was always
used this way), while zimg does not really have a plane count, but does,
in this case, only use plane 0 and 3, while 2 and 3 are unused and
unset. z_planes[] (not zplanes) is now always valid for all 4 array
entries (because it uses zimg indexes), but a -1 entry means it's an
unused plane.
I wonder if these conventions taken by mpv/zimg are not just causing
extra work. Maybe component IDs should just be indexes by the "natural"
order (e.g. R-G-B-A, Y-U-V-A, Y-A), and alpha should be represented as a
field that specifies the component ID for it, or just strictly assume
that 2/4 component formats always use the last component for alpha.
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We reorder the planes between mpv and zimg conventions. It turns out the
code still confused when which convention was used.
So the way it actually works is that the _only_ place where zimg order
is used is the zimg_image_buffer.plane[] array. plane_aligned[] and
zmask[] were accessed incorrectly, although I guess it rarely had a
reason to fail (plane reordering is mostly for RGB, which has planes of
all the same size).
Adjust some comments accordingly too.
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libzimg recently added direct alpha support and new API for it. (The API
change is rather minimal, and it turns out we can easily support old and
new zimg versions.)
This does not support _all_ alpha formats. For example, gray + alpha is
not supported yet, because my stupid design in the zimg wrapper would
require a planar gray + alpha format, while ffmpeg provides only a
packed one.
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Instead, use a YUV planar format. It doesn't matter, since we use the
format only internally and for "management" purposes. We're only
interested in the physical layout, not what colorspace FFmpeg "forcibly"
associates with it.
Also get rid of using the old and slightly sketchy mp_imgfmt_find()
function. Yep, the IMGFMT_RGB30 now "constructs" the planar format,
instead of using a pixfmt constant. Slightly inconvenient, tricky, and
fragile, but I like it, so bugger off.
This whole thing gets rid of some of the strange plane permutations that
were needed earlier.
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According to the definition of the GL format, and the definition in
img_format.h, and the actual output by vo_gpu, the order of components
was probably wrong. It's exceedingly likely that the vo_drm format (for
which this was originally written) has the same layout, so this was
probably a bug from when the zimg wrapper code was refactored.
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This is mostly just because of the odd RGB default gamma issue, which
shouldn't have any real impact. This also sets allow_approximate_gamma,
which I hope is fine for normal use cases.
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Normally, the Y plane can just be passed directly to zimg, and only the
chroma plane needs to be (de)interleaved. It still needs a copy if the Y
pointer is not aligned, though. (Whether this is actually a problem
depends on the CPU and probably zimg's compiler.)
This requires deciding per plane whether the plane should go through the
repack buffer or not. This logic is active in non-nv12 cases, because
not doing so would require extra code (maybe 2 lines or so).
repack_align is now always called, even if it's planar->planar with all
input aligned, but it won't actually do anything in that case. The
assumption is that zimg won't change behavior if you pass a callback
that does nothing versus passing NULL as callback.
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This is for formats like nv12 (including p010, nv24, etc.). Might be
important for hardware decoding. Previously, this would have forced a
libswscale fallback.
The genericism makes this only slightly more complicated. The main
complication is due to the fact that mixing planar and packed stuff is
insane (thanks, Nvidia).
P010 output will actually happily set any of the 6 bit "padding" LSB,
that are normally supposed to be 0 (for unpadded data there is P016).
Scaling happens with 16 bit precision. Not going to bother adding an
extra packer which zeros them out, or with shifting them in
packing/unpacking. Lets just hope nobody notices.
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We've set all planes to the same zmask. But for subsampled chroma, the
zmask obviously needs to be smaller. This could lead to out of bounds
memory read and write accesses.
Move the align repacker to a single function, since this is now more
convenient.
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This probably covers all packed formats which have byte-aligned
component, no alpha, and no subsampling. Everything else needs more
imgfmt metadata, or something even more complicated. Alpha is primarily
not supported, because zimg requires a second scaler instance for it,
and handling packing/unpacking with it is an unacceptable mess.
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Raise swscale and zimg default parameters. This restores screenshot
quality settings (maybe) unset in the commit before. Also expose some
more libswscale and zimg options.
Since these options are also used for VOs like x11 and drm, this will
make x11/drm/etc. much slower. For compensation, provide a profile that
sets the old option values: sw-fast. I'm also enabling zimg here, just
as an experiment.
The core problem is that we have a single set of command line options
which control the settings used for most swscale/zimg uses. This was
done in the previous commit. It cannot differentiate between the VOs,
which need to be realtime and may accept/require lower quality options,
and things like screenshots or vo_image, which can be slower, but should
not sacrifice quality by default.
Should this have two sets of options or something similar to do the
right thing depending on the code which calls libswscale? Maybe. Or
should I just ignore the problem, make it someone else's problem (users
who want to use software conversion VOs), provide a sub-optimal
solution, and call it a day? Definitely, sounds good, pushing to master,
goodbye.
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Purpose uncertain. I guess it's slightly better, maybe.
The move of the sws/zimg options from VO opts (vo_opt_list) to the
top-level option list is tricky. VO opts have some helper code in vo.c,
that sends VOCTRL_SET_PANSCAN to the VO on every VO opts change. That's
because updating certain VO options used to be this way (and not just
the panscan option). This isn't needed anymore for sws/zimg options, so
explicitly move them away.
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Now these are like x2ccc10_pack: MSB to LSB, with bit width following
each component (except for components with the same bit width).
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This may be used later elsewhere.
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Works for RGB (e.g. rgb48le) and XYZ.
It's unsure whether XYZ is really correctly converted.
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The RGB pack/unpack code in theory supports packed, non-subsampled YUV,
although in practice FFmpeg defines no such formats. (Only one with
alpha, but all alpha input is rejected by the current code.)
This would in theory have failed, because we would have selected a GBRP
format (instead of YUV), which makes no sense and would either have been
rejected by zimg (inconsistent parameters), or lead to broken output
(wrong permutation of planes).
Select the correct format and don't permute the planes in the YUV case.
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As suggested by the zimg author. This is mostly related to XYZ support.
It's unclear whether this works. Using the only XYZ test sample we know,
and the next commits to consume the pixfmt, it looks wrong.
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This provides a very similar API to sws_utils.h, which can be used to
convert and scale from one mp_image to another.
This commit adds only the code, but does not use it anywhere.
The code is quite preliminary and barely tested. It supports only a few
pixel formats, and will return failure for many others. (Unlike
libswscale, which tries to support anything that FFmpeg knows.)
zimg itself accepts only planar formats. Supporting other formats
requires manual packing/unpacking. (Compared to libswscale, the zimg API
is generally lower level, but allows for more flexibility.) Only BGR0
output was actually tested. It appears to work.
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