MaxCLL is the more authoritative source for the metadata we are
interested in. The use of mastering metadata is sort of a hack anyway,
since there's no clearly-defined relationship between the mastering peak
brightness and the actual content. (Unlike MaxCLL, which is an explicit
relationship)
Also move the parameter fixing to `fix_image_params`
I don't know if the avutil check is strictly necessary but I've included
it anyway to be on the safe side.
List of changes:
1. Kill nom_peak, since it's a pointless non-field that stores nothing
of value and is _always_ derived from ref_white anyway.
2. Kill ref_white/--target-brightness, because the only case it really
existed for (PQ) actually doesn't need to be this general: According
to ITU-R BT.2100, PQ *always* assumes a reference monitor with a
white point of 100 cd/m².
3. Improve documentation and comments surrounding this stuff.
4. Clean up some of the code in general. Move stuff where it belongs.
iive agreed only to LGPL 3.0+ only. All of his relevant changes are for
XvMC, for which mpv completely dropped support back in mplayer2 times.
But you could claim that the get_format code represents some residual
copyright (everything else added by iive was removed, only get_format
still is around in some form). While I doubt that this is relly
copyright-relevant, consider it is for now.
michael is the original author of vd_lavc.c, so this file can become
LGPL only after the core becomes LGPL.
cehoyos did not agree with the LGPL relicensing, but all of his code is
gone.
Some others could not be reached, but their code is gone as well. In
particular, vdpau support, which was originally done by Nvidia, had
larger impact on vd_lavc.c, but vdpau support was first refactored a few
times (for the purpose of modularization) and moved to different files,
and then decoding was completely moved to libavcodec.
Lastly, assigning the "opaque" field was moved by Gwenole Beauchesne in
commit 8e5edec13e. Agreement is pending (due to copyright apparently
owned by the author's employer). So just undo the change, so we don't
have to think about whether the change is copyrightable.
Unfortunately quite a mess, in particular due to the need to have some
compatibility with the old API. (The old API will be supported only in
short term.)
The new API has literally no advantages (other than that we can drop
mp_vt_download_image and other things later), but it's sort-of uniform
with the other hwaccels.
"--videotoolbox-format=no" is not supported with the new API, because it
doesn't "fit in". Probably could be added later again.
The iOS code change is untested (no way to test).
It's not really guaranteed that other components always set this (e.g.
on subtle errors), so check it explicitly. Although I'm not aware of a
failing case.
If vo_opengl is used, and vo_opengl already created the vdpau interop
(for whatever reasons), and then preemption happens, and then you try to
enable hw decoding, it failed. The reason was that preemption recovery
is not run at any point before libavcodec accesses the vdpau device.
The actual impact was that with libmpv + opengl-cb use, hardware
decoding was permanently broken after display mode switching (something
that caused the display to get preempted at least with older drivers).
With mpv CLI, you can for example enable hw decoding during playback,
then disable it, VT switch to console, switch back to X, and try to
enable hw decoding again.
This is mostly because libav* does not deal with preemption, and NVIDIA
driver preemption behavior being horrible garbage. In addition to being
misdesigned API, the preemption callback is not called before you try to
access vdpau API, and then only with _some_ accesses.
In summary, the preemption callback was never called, neither before nor
after libavcodec tried to init the decoder. So we have to get
mp_vdpau_handle_preemption() called before libavcodec accesses it. This
in turn will do a dummy API access which usually triggers the preemption
callback immediately (with NVIDIA's drivers).
In addition, we have to update the AVHWDeviceContext's device. In theory
it could change (in practice it usually seems to use handle "0").
Creating a new device would cause chaos, as we don't have a concept of
switching the device context on the fly. So we simply update it
directly. I'm fairly sure this violates the libav* API, but it's the
best we can do.
Sigh...
The functionality is not actually needed for vdpau, but if the vdpau
hwaccel is present, the FFmpeg version is new enough that it includes
the field.
These decoders can select the decoding device with hw_device_ctx, but
don't use hw_frames_ctx (at least not in a meaningful way).
Currently unused, but intended to be used for cuvid, as soon as it hits
ffmpeg git master.
Also make the vdpau and vaapi hwaccel definition structs static, as we
have removed the old code which would have had clashing external
declarations.
This drops support for the old libavcodec APIs. Now FFmpeg 3.3 or FFmpeg
git is required. Libav has no release with the new APIs yet, so for
Libav git as of a few weeks or months ago or so is required if you want
to use Libav.
Not much actually changes in hwdec_vaegl.c - some code is removed, but
the reindentation inflates the diff.
If vaapi was found, but neither the old or new libavcodec vaapi hwaccel
API, then HAVE_VAAPI_HWACCEL will be defined, but not _OLD or _NEW. The
HAVE_VAAPI_HWACCEL define pretty much exists only for acrobatics with
our own waf dependency checker helper code.
The new API works like the new vaapi API, using generic hwaccel support.
One minor detail is the error message that will be printed if using
non-4:2:0 surfaces (which as far as I can tell is completely broken in
the nVidia drivers and thus not supported by mpv). The HEVC warning
(which is completely broken in the nVidia drivers but should work with
Mesa) had to be added to the generic hwaccel code.
This also trashes display preemption recovery. Fuck that. It never
really worked. If someone complains, I might attempt to add it back
somehow.
This is the 4th iteration of the libavcodec vdpau API (after the
separate decoder API, the manual hwaccel API, and the automatic vdpau
hwaccel API). Fortunately, further iterations will be generic, and not
require much vdpau-specific changes (if any at all).
hw_vaapi.c didn't do much interesting anymore. Other than the function
to create a device for decoding with vaapi-copy, everything can be done
by generic code. Other libavcodec hwaccels are planned to provide the
same API as vaapi. It will be possible to drop the other hw_ files in
the future. They will use this generic code instead.
Apparently this is the maximum that can be preserved. There is also
something about the decoder being able only to use 3 frames at a time,
and I'm assuming these are part of the 8 frames.
This can be useful in other contexts.
Note that we end up setting AVCodecContext.width/height instead of
coded_width/coded_height now. AVCodecParameters can't set coded_width,
but this is probably more correct anyway.
The FFmpeg versions we support all have the APIs we were checking for.
Only Libav missed them. Simplify this by explicitly checking for FFmpeg
in the code, instead of trying to detect the presence of the API.
Successful decoding of a frame resets ctx->hwdec_fail_count to 0 - which
us ok, but prevents fallback if it fails if --vd-lavc-software-fallback
is set to something higher than 1.
Just fail it immediately, since failing here always indicates some real
error (or OOM), not e.g. a video parsing error or such, which we try to
tolerate via the error counter.
In a way it can be reused. For now, sw_format and initial_pool_size
determination are still vaapi-specific. I'm hoping this can be eventally
moved to libavcodec in some way. Checking the supported_formats array is
not really vaapi-specific, and could be moved to the generic code path
too, but for now it would make things more complex.
hw_cuda.c can't use this, but hw_vdpau.c will in the following commit.
If hardware decoding is enabled (via --hwdec anything), the player was
printing an informational message that software decdoing is used.
Basically, this confuses users, because they think there is a problem or
such. Just disable the message, it's semi-useless anyway.
This was suggested on IRC, after yet another user was asking why this
message was shown (with a follow up discussion which CPUs can decode
what kind of video codecs).
Other hwdecs will also be able to use this (as soon as they are switched
to use AVHWFramesContext).
As an additional feature, failing to copy back the frame counts as
hardware decoding failure and can trigger fallback. This can be done
easily now, because it needs no way to communicate this from the hwaccel
glue code to the common code.
The old code is still required for the old decode API, until we either
drop or rewrite it. vo_vaapi.c's OSD code (fuck...) also uses these
surface functions to a higher degree.
Mostly affects conversion of the colorimetric parameters.
Not changing AV_FRAME_DATA_MASTERING_DISPLAY_METADATA handling - that's
too messy, as decoders typically output it for keyframes only, and would
require weird caching that can't even be done on the level of the frame
rewrapping functions.
This fixes direct rendering with hwdec_vaegl.c.
The code duplication between update_image_params() and
mp_image_copy_fields_from_av_frame() is quite annoying,
bit will have to be resolved in another commit.
The old API is deprecated, and libavcodec prints a warning at runtime.
The new API is a bit nicer and does many things for you, such as
managing the underlying hwaccel decoder. libavutil also provides code
for managing surfaces (we use their surface pool).
The new code does not contain any code from the original MPlayer VAAPI
patch (that was used as base for some of the vaapi code in mpv). Thus
the new code is LGPL.
The new API actually does not add any visible symbols, so the only way
to detect it is a version check. Of course, the versions overlap
between FFmpeg and Libav, which requires additional care. The new
API did not get merged into FFmpeg yet, so there's no check for
FFmpeg.
This is simpler and more robust, especially for the hwdec fallback case.
The most annoying issue is that C doesn't support multiple return values
(or sum types), so the decode call gets all awkward.
The hwdec fallback case does not need to try to produce some output
after the fallback anymore. Instead, it can use the normal "replay"
code path.
We invert the "eof" bool that vd_lavc.c used internally. The
receive_frame decoder API returns the inverse of EOF, because
returning "true" from the decode function if EOF was reached
feels awkward.
Usually they happen at the same time, but conflating them is still a bit
unclean and could possibly cause problems in the future. It's also
really unnecessary.
The ffmpeg cuda wrappers need more than 1 packet for determining whether
hw decoding will work. So do something complicated and keep up to 32
packets when trying to do hw decoding, and replay the packets on the
software decoder if it doesn't work.
This code was written in a delirious state, testing for regressions and
determining whether this is worth the trouble will follow later. All mpv
git users are alpha testers as of this moment.
Fixes#3914.
Conceptually cleaner, although the API claims this is equivalent.
Originally, AVCodecContext fields were used, because not all supported
libavcodec/libavutil versions had the AVFrame fields.
This is not done for chroma_sample_location - it has no AVFrame field.
Helps with gif, probably does unwanted things with other formats.
This doesn't handle --end quite correctly, but this could be added
later.
Fixes#3924.
This is a bit unintuitiv, but it appears hwdec backends have to unset
hwdec_priv manually in their uninit function. Normally with this idiom
you'd expect the common code to do this (and maybe even freeing the priv
struct). Since other hwdec backends do this quite consistently, just fix
vdpau for now.
Also add an assert to detect similar bugs sooner.
Fixes#3788.
At this point, all other hwaccels provide -copy modes, and vdpau is the
exception with not having one. Although there is vf_vdpaurb, it's less
convenient in certain situations, and exposes some issues with the
filter chain code as well.
Both AVFrame.pts and AVFrame.pkt_pts have existed for a long time. Until
now, decoders always returned the pts via the pkt_pts field, while the
pts field was used for encoding and libavfilter only. Recently, pkt_pts
was deprecated, and pts was switched to always carry the pts.
This means we have to be careful not to accidentally use the wrong
field, depending on the libavcodec version. We have to explicitly check
the version numbers. Of course the version numbers are completely
idiotic, because idiotically the pkg-config and library names are the
same for FFmpeg and Libav, so we have to deal with this explicitly as
well.
