b5bace2391
Compositor video frame transport should not flatten frames into a shareable bitmap before crossing an IPC boundary. That conversion loses the native YUV representation and makes Web-side transport code own the frame wire format. Teach VideoFrame to encode its YUV planes into a shared anonymous buffer with the color space, timing, subsampling, bit depth, and CICP metadata needed to rebuild the frame on decode. Add YUVData helpers for checked plane sizing and construction from validated plane bytes so malformed buffers are rejected before a frame is created. This is preparatory work required to add IPC between the main and compositor threads.
69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
/*
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* Copyright (c) 2026, Gregory Bertilson <gregory@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Error.h>
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#include <AK/FixedArray.h>
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#include <AK/NonnullOwnPtr.h>
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#include <AK/NonnullRefPtr.h>
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#include <LibGfx/Forward.h>
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#include <LibGfx/Size.h>
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#include <LibMedia/Color/CodingIndependentCodePoints.h>
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#include <LibMedia/Subsampling.h>
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class SkYUVAPixmaps;
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namespace Gfx {
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namespace Details {
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struct YUVDataImpl;
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}
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// Holds planar YUV data with metadata needed for GPU conversion.
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// Uses FixedArray for deterministic buffer sizing.
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// Not ref-counted - owned directly by decoded video frame objects via NonnullOwnPtr.
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class YUVData final {
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public:
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struct PlaneSizes {
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size_t y;
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size_t u;
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size_t v;
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size_t total;
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};
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static ErrorOr<PlaneSizes> plane_sizes(IntSize size, u8 bit_depth, Media::Subsampling);
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static ErrorOr<NonnullOwnPtr<YUVData>> create(IntSize size, u8 bit_depth, Media::Subsampling, Media::CodingIndependentCodePoints);
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static ErrorOr<NonnullOwnPtr<YUVData>> create_from_data(IntSize size, u8 bit_depth, Media::Subsampling, Media::CodingIndependentCodePoints, ReadonlyBytes y_data, ReadonlyBytes u_data, ReadonlyBytes v_data);
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~YUVData();
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IntSize size() const;
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u8 bit_depth() const;
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Media::Subsampling subsampling() const;
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Media::CodingIndependentCodePoints const& cicp() const;
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// Writable access for decoder to fill buffers after creation
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Bytes y_data();
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Bytes u_data();
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Bytes v_data();
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ReadonlyBytes y_data() const;
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ReadonlyBytes u_data() const;
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ReadonlyBytes v_data() const;
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ErrorOr<NonnullRefPtr<Bitmap>> to_bitmap() const;
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SkYUVAPixmaps make_pixmaps() const;
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private:
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explicit YUVData(NonnullOwnPtr<Details::YUVDataImpl>);
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NonnullOwnPtr<Details::YUVDataImpl> m_impl;
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};
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}
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