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Update to v6.292.0

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- Update libplacebo to version 5.264.1. See details in:
    https://code.videolan.org/videolan/libplacebo/-/tags/v5.264.0
- Bump meson dependency to 0.63
- Add baselibs.conf (for the sake of ffmpeg)

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- Update libplacebo to version 5.229.2. See details in:
    https://code.videolan.org/videolan/libplacebo/-/tags/v5.229.2

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- Update libplacebo to version 5.229.1. See details in:
    https://code.videolan.org/videolan/libplacebo/-/tags/v5.229.1
- Update libplacebo to version 5.229.0. See details in:
    https://code.videolan.org/videolan/libplacebo/-/tags/v5.229.0

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Update to v4.208.0

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Update to v4.192.1

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Update to v4.192.0

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Update to v4.157.0

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- Update libplacebo to version 3.120.3:
This minor release fixes a number of regressions surrounding memory
imports and DRM modifiers, specifically aimed at issues that arose with
mpv's --hwdec=vaapi.
Changes:
- `pl_fmt.modifiers` now always includes DRM_FORMAT_MOD_INVALID on
   OpenGL, which instructs the implementation to not specify modifiers
- passing a DRM modifier not in the list of supported modifiers is now
  considered a hard error, to rule out non-working hwaccel formats
Fixes:
- fix a crash when using sampling shaders on textures with unknown formats
- fix improperly specified SDL header imports in the demos
- fix an issue where the vulkan texture handle capabilities were testing
  for presence of the wrong extension
- fix an issue where non-enabled DRM modifier structs were accidentally
  linked into the pNext chain, causing issues with some drivers

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- Update libplacebo to version 3.120.2:
This minor release fixes a number of additional bugs related to the
thread queue, included demos, included helpers, and build system.
Changes:
- replace the `shaderc` library checks by pkg-config checks
- `pl_dispatch` no longer grows infinitely, but prunes stale cache
  entries after a certain threshold
- improve logging of GPU capabilities (including format capabilities)
Fixes and performance improvements:
- fix a typo on an error message
- fix a use-after-free edge case in `plplay`
- filter out Infinity, NaN and other values from fps/vps estimates
- add several warnings for suspected frame queue API misuses
- fix a crash when combining pl_render_image_mix with cropped frames
- fix a crash on AV_PIX_FMT_NONE in the libav helpers
- fix the loading of overlays in the `sdlimage` demo
- fix a number of potential overflows on 32-bit platforms
- omit redundant identity matrices in pl_shader_decode_color
- fix crash in frame queue with certain out-of-order PTS sequences
- add missing link to vulkan dependency in the `video-filtering` demo
- correctly shift overlays when drawing to subsampled YCbCr planes
- add missing check for PL_GPU_CAP_CALLBACKS in `utils/{libav,dav1d}.h`
- improve handling of asynchronous texture uploads in `utils/libav.h`

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- Update libplacebo to version 3.120.1:
This hotfix release fixes a number of minor issues with the v3.120.0
release, and also modularizes the included demo programs to cut down on
the number of compiled binaries.
Changes:
- hexadecimal strings in custom shaders may now include whitespace
- added 16-bit half float formats to the dummy pl_gpu
- significantly reduced verbosity of the included demo programs
- merged all of the demo program variants into a single binary that
  picks the best windowing system / graphical API at runtime
- install `plplay` when demos are enabled
Fixes and performance improvements:
- fixed an integer overflow in a texture bounds check
- fixed a false positive error in the test framework on 32-bit platforms
- fixed some minor issues with various outdated comments
- fixed a potential use-after-free in the `plplay` demo program when
  playing files containing embedded ICC profiles
- Update libplacebo to version 3.120.0. (Upstream changelog appended)
- Create a new package `plplay` for the included demo program. This requires
  bundling a copy of `nuklear.h`, which is single-header library not included
  as part of the libplacebo source distribution.
This is a feature release, introducing frame mixing, DRM format
modifiers, and support for custom LUTs -, while also greatly expanding
the available demo programs, in particular the `plplay` video player.
The main highlight is the new `pl_queue` abstraction living in
<libplacebo/utils/frame_queue.h>. This greatly simplifies the core of a
libplacebo-based video renderer by translating a stream of input frames
into an array of GPU-mapped textures suitable for frame mixing, given a
corresponding vsync timestamp. New frames can be delivered to this API
using a push or pull model, and they are lazily uploaded on an as-needed
basis as well as internally garbage collected when no longer needed.
This abstraction also contains all needed machinery for estimating
source/display framerates by comparing and averaging timestamps, freeing
users from the burden of having to accurately determine this information
a priori.
Also worth mentioning is the addition of support for custom LUTs,
currently only in Adobe's .cube format. They can be applied flexibly at
a number of locations in the video processing pipeline, including as a
replacement for YUV<->RGB conversion or tone/gamut mapping, and fed with
either normalized linear light or native-gamma values.
Among the included demo programs, the `plplay` example video player has
been greatly expanded - adding support for a settings GUI (based on
nuklear), frame timing and mixing, custom shaders, and more. This
example video player now serves as a convenient platform to demonstrate
all of libplacebo's advanced rendering features.
Finally, all of libplacebo now contains only code written entirely from
scratch (rather than deriving from mpv), opening up the possibility to
explore different licenses besides the current LGPLv2.1+. In particular,
permissive (MIT/BSD-style) licenses are being considered.
Additions:
- add asynchronous GPU callbacks, specifically to `pl_tex_transfer`,
  allowing for non-blocking host memory transfer operations
- add `pl_shared_mem.stride_w/h` to control dmabuf pitch
- add `pl_render_image_mix` to blend multiple frames into a single
  output image, given relative timestamp information
- add the `pl_filter_mitchell_clamp` filter preset
- add `pl_render_params.preserve_mixing_cache` to speed up redraws after
  renderer size changes when frame mixing is active
- add <libplacebo/utils/dav1d.h> to help with Dav1dPicture mapping
- implement `PL_HANDLE_HOST_PTR` for the OpenGL backend
- implement drm format modifiers for vulkan
- add a new field `pl_fmt.modifiers` for DRM format modifier negotiation
- add new header <libplacebo/shaders/lut.h> to load custom LUTs
  (currently only supporting the .cube format)
- add `index_data/buf` to `pl_pass_run_params`, adding support for
  indexed vertex data when dispatching shader passes
- add `pl_dispatch_vertex` to allow dispatching fragment shaders using
  a list of custom vertices with custom vertex attributes
- add `pl_frame_recreate_from_avframe` and `pl_download_avframe` to help
  downloading GPU textures back into AVFrame form
- add a new header <libplacebo/utils/frame_queue.h> to assist in taking
  a stream of (Frame, PTS) pairs as well as a list of VSync times and
  turning them into a stream of `pl_frame_mix` structs
- add `pl_white_from_temp` and `pl_color_adjustment.temperature` to
  apply white point adjustments between correlated color temperatures (K)
- add `pl_filter_preset.description` containing a longer, human-readable
  name for a given filter preset
Changes:
- `pl_3dlut_params` has been renamed `pl_icc_params`
- `pl_render_params.force_3dlut` has been renamed `force_icc_lut`
- `pl_3dlut_update/apply` have been renamed to `pl_icc_update/apply` and
  moved to a (conditionally installed) new header <libplacebo/shaders/icc.h>
- `pl_upload_plane` no longer initializes `out_plane->shift_x/y` to 0,
  instead leaving them unmodified (to avoid clobbering existing shift data)
- `pl_filter_box` has been renamed to `pl_filter_nearest`
- `pl_filter_triangle` has been renamed to `pl_filter_bilinear`
- `pl_render_params.frame_mixer = NULL` now disables frame mixing - to
  get back the old behaviour, set this to `&pl_oversample_frame_mixer`.
- `pl_color_map_params.gamut_warning` now highlights out-of-gamut colors
  in bright pink, rather than the old (ill-defined) inversion behaviour
- `pl_named_filter_config` has been renamed to `pl_filter_preset`
- `pl_find_named_filter` has been renamed to `pl_find_filter_preset`
- ditto for `pl_named_filter_function` and `pl_filter_function_preset`
Fixes and performance improvements:
- fix buffer overflow in custom shader STORAGE blocks
- fix include path for glslang >= 11.0.0
- actually enable shader subgroup operations for HDR peak detection
- fix locale dependence of shader parsing primitives
- fix AVCOL_SPC_SMPTE170M mapping
- fix wrong color space selection in `pl_vulkan_create_swapchain`
- work-around low UBO size limits on some platforms
- fix compilation issues on C++ due to the use of reserved identifiers
- fix `pl_get_detected_peak` on platforms without host-visible SSBOs
- fix edge case in vulkan texture handle capabilities check
- fix suboptimal mutex destruction code
- skip peak detection when outputting to HDR displays
- fix edge cases in shader LUT type selection logic
- avoid redundant scaling passes when scaling anamorphic content
- merge similar planes before dispatching heavy shaders (e.g.
  debanding, hooks)
- avoid scaling passes for certain small fractional scaling steps
- entirely avoid processing unneeded components when dispatching scalers
- avoid using more components than necessary for intermediate FBOs
- fix out-of-bounds read for small non-cropped emulated textures
- avoid thrashing the shader cache when reinitializing OpenGL FBOs
- fix incorrect include in <libplacebo/opengl.h>
- fix vk.xml priority issue on windows
- fix undefined behaviour / GPU hangs in HDR peak detection shader
- fix incorrect forwarding of DRM modifiers to the OpenGL backend
- fix crash on AV_PIX_FMT_FLAG_BAYER
- fix various compilation issues on certain platforms
- fix obscure edge-case in floating point printing routine
- `pl_render_params.force_icc_lut` now excludes no-op cases
- fix handling of custom shader COMPUTE blocks
- correctly apply hue and saturation controls for non-YCbCr color spaces

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- Update to version 3.104.0
This is a major release, introducing many new features and
modifications. Most importantly, libplacebo now interoperates well
with FFmpeg's libav* abstractions. This is primarily exposed via a
new set of helpers, <libplacebo/utils/libav.h>, implemented as a
single header library. In addition to this, a number of other
supporting changes have been made to the API, most notably the
unification of `pl_image` and `pl_render_target` into a single
`pl_frame` concept, similar in spirit to AVFrame. As such,
libplacebo now supports **rendering to planar targets**, including
subsampled YCbCr.
Besides the libav* compatibility changes, this release also brings
with it a new feature for custom shaders: buffer blocks, and
persistent storage. This can be used by third parties to implement
stateful shaders (e.g. motion interpolation or temporal
deinterlacing), or be leveraged to speed up some shaders by
combining multiple passes into one.
Finally, various import/export procedures have been expanded,
including the ability to import host pointers and real-world
DMABUFs.
Additions:
  * add `pl_memory_qualifiers`, plus a corresponding
    `pl_shader_desc.memory`, to allow attaching GLSL memory
    qualifiers (coherent, volatile etc.) to shader descriptors
  * add functions `pl_dispatch_save` and `pl_dispatch_load` to
    allow saving/restoring the contents of an entire
    `pl_dispatch`'s cache
  * add functions `pl_renderer_save` and `pl_renderer_load` to
    allow saving/restoring the contents of an entire
    `pl_renderer`'s cache
  * add `pl_vulkan_swapchain_params.prefer_hdr`, which will cause
    the surface format selection logic to try HDR output formats
    first
  * add `pl_buf_copy` to copy from one buffer to another
  * add `pl_get_detected_peak`, to read back the result of peak
    detection
  * add `pl_primaries_superset` to test if one set of primaries is
    fully enclosed by another
  * add `pl_color_map_params.gamut_clipping`, which will
    colorimetrically clip any out-of-gamut colors by desaturating
    them towards neutral gray until they're in-gamut, rather than
    clipping per channel as before
  * add `PL_GPU_CAP_SUBGROUPS` and `pl_gpu_limits.subgroup_size`,
    to expose GLSL subgroup functionality via the `pl_gpu`
    interface
  * add `pl_gpu_is_failed`, to query at a high level whether the
    `pl_gpu` is in some internal failure state. GPUs in this state
    should be recreated, using the appropriate mechanism
  * add `pl_shader_custom`, to allow injecting arbitrary custom
    GLSL code into a `pl_shader`.
  * add `pl_buf_params.import_handle` to allow importing buffers
  * add `PL_HANDLE_HOST_POTR`, to allow importing arbitrary host
    pointers
  * add `pl_pass_run_params.vertex_buf`, to allow drawing vertex
    data directly from a `pl_buf`, guarded by
    `pl_gpu_limits.max_vbo_size`
  * add `_COUNT` members to all public enums, for consistency
  * add `pl_shared_mem.drm_format_mod`, to allow communicating
    DRM format modifiers when importing/exporting textures
  * add support for importing DMABUFs via EGL, via the new fields
    `pl_opengl_params.egl_display/context`
  * add `pl_fmt.fourcc` to facilitate mapping between `pl_fmt` and
    DRM
  * add the missing `pl_var_*` helpers, for consistency
  * add `pl_plane_data_align` to help with aligning
    `pl_plane_data` structs to byte boundaries
  * add support for STORAGE textures in user shaders, which can be
    used to persist data across separate invocations of the shader
  * add support for BUFFER blocks in user shaders, which can be
    used to create UBOs or SSBOs for use inside shaders, the latter
    of which can also persist across frames and be used to store
    persistent state
  * add PL_COLOR_PRIM_EBU_3213 and PL_COLOR_PRIM_FILM_C
  * add a new header <libplacebo/utils/libav.h>, containing a
    variety of helper functions for interoperating between libav*
    and libplacebo
  * add `demos/plplay.c` to serve as a demonstration of how to make
    a trivial playback loop with libavcodec and libplacebo
  * add `pl_sample_src.component_mask` to allow sampling an
    arbitrary subset of the available components from a plane
  * add `pl_frame_is_cropped` and `pl_frame_clear` to assist in
    properly clearing frames before rendering to them
  * add `pl_tex_poll` to assist in interoperating with some
    external APIs
  * add `pl_render_params.blend_params` to allow blending the final
    output
Changes:
  * remove `pl_image.signature` and
    `pl_render_params.skip_redraw_caching`
  * change vulkan surface format selection to prioritize formats by
    'score', preferring higher depth integer formats
  * `pl_fmt` may now have PL_FMT_CAP_STORABLE even when
    `glsl_format` is NULL, in which case formatless image storage
    must be used
  * `pl_buf_read` no longer requires `buf_offset` be a multiple of
    4
  * `pl_buf_*` commands are now synchronized internally:
  * `pl_buf_write` and `pl_buf_read` now block while the buffer is
    in use Note: for this reason, `pl_buf_write` should not be used
    in loops
  * `pl_tex_upload/download` may now be called on in-use buffers
  * allow `pl_dispatch_compute` on shaders with outputs, including
    the ability to automatically determine the number of work
    groups based on the shader output resolution
  * remove `pl_buf_params.type`, and the concept of buffer types in
    general. `pl_buf` is now a generic catch-all for any type of
    buffer, with individual capabilities in `pl_buf_params`
    determinig what type of shader operations it can be used for
  * relax the alignment requirements on `pl_tex_transfer_params`
  * change `pl_opengl_wrap_params` to allow directly importing
    framebuffers in addition to textures
  * rename `pl_color_levels` members for clarity
  * make `pl_opengl` ignore software rasterizers by default, unless
    the new field `pl_opengl_params.allow_software` is set
  * add `pl_av1_grain_params.luma_comp` to allow drawing the luma
    component from a channel with nonzero index
  * `pl_renderer` now supports rendering to planar targets,
    including subsampled targets
  * `pl_image` and `pl_render_target` have been removed and unified
    into a single `pl_frame` concept
  * remove `pl_tex_params.sample_mode/address_mode` and move them
    to `pl_desc_binding` instead, to decouple them from texture
    creation
  * refactor the signature of `pl_tex_blit`
Fixes and performance improvements:
  * fix an oversight where `pl_buf_destroy` delayed some buffer
    destructions unnecessarily
  * fix a limitation where `pl_tex_destroy` sometimes delayed
    destroying textures unnecessarily
  * improve the performance of `pl_dispatch`'s code for assembling
    UBOs
  * improve the performance of `pl_shader_av1_grain` by switching
    from SSBOs to texture LUTs, also improving compatibility with
    older GL
  * improve the performance of `pl_shader_detect_peak` on GPUs with
    access to subgroups operations
  * fix an issue where reinitializing shader state objects with
    different settings sometimes resulted in undefined behaviour
  * fix some GLSL backwards compatibility issues
  * slightly cut down on unnecessary image layout transitions
  * add some miscellaneous debug print-outs, and improve the
    legibility of some existing log messages
  * fix an issue where freeing buffer variables from shader
    descriptors could result in use-after-free
  * add support for vulkan memory imports requiring dedication
    allocations
  * slightly improve, and fix, the vulkan memory placement logic
  * significantly improve the performance of `pl_tex_download` by
    importing the target host pointer directly
  * improve the performance of small LUTs, especially for the
    non-compute polar fallback path
  * prevent `pl_renderer` from unneccessarily applying a 3DLUT when
    both the input and output frames have the same ICC profile
  * fix the behaviour of partially specified `pl_bit_encoding`
    structs
  * fix the component ordering on some odd packed vulkan formats
  * fix an issue where `pl_plane_data_from_mask` broke for high bit
    depths
  * make `pl_renderer` consult the dither bit depth from the
    texture precision, if absent from `pl_bit_encoding`
  * fix the behaviour of `pl_renderer` when sampling from textures
    with swapped component orders
  * fix the implementation of PL_COLOR_SYSTEM_BT_2100_HLG
  * fix some issues relating to missing includes
  * enforce legality of image usage parameters on `pl_vulkan_wrap`
  * fix an undesired shader double-compilation when using
    orthogonal scalers with subsampled chroma planes
  * fix an issue where application of a 3DLUT cleared the alpha
    channel
  * add a missing extension to `pl_vulkan_recommended_extensions`
  * fix the plane alignment code for oddly sized subsampled chroma
  * fix the poor precision of `pl_shader_dither` for high bit
    depths
  * fix several possible overflows in the BT.2390 shader
  * fix a bug where using a polar sampler to draw a scaled overlay
    onto a non-storable target neglected to disable compute shaders
  * fix a bug where the renderer could sometimes alias when
    downscaling, in particular if both the upsampler and
    downsampler are set to bicubic
  * improve performance of scalers by avoiding bilinear filtering
  * reduce verbosity of memory allocations
  * fix missing PL_FMT_CAP_BLENDABLE on opengl fbos
  * significantly improve precision of float literals in shaders
  * add better error checking to gl_pass_create

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- Update to version 2.72.2
This hotfix release fixes an additional glslang linking/build issue
that was missed in v2.72.1.
Bug fixes:
  * fix linking issue with some installations of glslang >= 11.0.0
Changes for 2.72.1:
This release backports a number of bug fixes from master affecting
the v2.72.0 release, most notably extending the range of supported
glslang versions, as well as fixing the 3DLUT/ICC generation code.
Bug fixes:
  * compatibility with glslang >= 8.13.3743
  * compatibility with new glslang semantic versioning scheme
  * fix broken shaders on some versions of GLES by defaulting to
    32-bit precision for floating point math
  * fix the vulkan API version passed to shaderc
  * fix the extension check for glInvalidateTexImage
  * fix pl_tex_create on older GLES versions
  * fix OpenGL logging thread safety
  * fix undefined memcmp() in pl_shader_av1_grain
  * fix pl_render_target.repr being ignored by pl_render_image
  * fix 3DLUT generation code (generated corrupt LUTs in all cases)
  * fix symbol visibility on some versions of GCC
  * fix potential overflow in BT.2390 shader
  * properly restrict pl_shader_sample_polar to GLSL >= 130
  * fix vulkan function loading of promoted core functions
Other changes:
  * tiny performance gain in 3DLUT generation
  * pl_opengl_create now logs GL_EXTENSIONS
  * log some additional VkResult enum members
  * improve several vulkan log messages by using friendly names of

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