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https://github.com/KytyPS5/KytyPS5.git
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nmzik
48 lines
1.7 KiB
C++
48 lines
1.7 KiB
C++
#ifndef EMULATOR_SRC_GRAPHICS_HOST_GPU_RENDERER_STREAMBUFFER_H_
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#define EMULATOR_SRC_GRAPHICS_HOST_GPU_RENDERER_STREAMBUFFER_H_
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#include "common/abi.h"
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#include "common/common.h"
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#include <cstdint>
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#include <memory>
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#include <mutex>
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namespace Libs::Graphics {
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struct GraphicContext;
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struct VulkanBuffer;
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// Host-only mapped stream mechanism. BufferCache owns the upload policy/API; one backend remains
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// attached to each CommandBuffer so Reset is provably after that command's fence. Replacing this
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// backend with scheduler watches will not change descriptor/render call sites.
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class HostStreamBuffer final {
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public:
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explicit HostStreamBuffer(GraphicContext& graphics);
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~HostStreamBuffer();
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KYTY_CLASS_NO_COPY(HostStreamBuffer);
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[[nodiscard]] bool Copy(const void* src, uint64_t size, uint64_t alignment,
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VulkanBuffer*& out_buffer, uint64_t& out_offset, uint64_t& out_range);
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void Reset() noexcept;
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void Release() noexcept;
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private:
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void EnsureBuffer();
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// Interim fence-scoped backend: one command processor's eight live command buffers reserve up
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// to 128 MiB lazily. Additional active processors scale that aggregate until this backend is
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// replaced by a single 64 MiB scheduler-watched ring; the BufferCache seam stays fixed.
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static constexpr uint64_t CAPACITY = 16ull * 1024ull * 1024ull;
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mutable std::mutex m_mutex;
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GraphicContext& m_graphics;
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std::unique_ptr<VulkanBuffer> m_buffer;
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void* m_mapped = nullptr;
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uint64_t m_offset = 0;
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};
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} // namespace Libs::Graphics
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#endif // EMULATOR_SRC_GRAPHICS_HOST_GPU_RENDERER_STREAMBUFFER_H_
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