43 lines
1.0 KiB
C++
43 lines
1.0 KiB
C++
#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <memory>
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namespace rk3588 {
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struct DmaBuffer {
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int fd = -1;
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void* ptr = nullptr;
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size_t size = 0;
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DmaBuffer() = default;
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~DmaBuffer();
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DmaBuffer(const DmaBuffer&) = delete;
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DmaBuffer& operator=(const DmaBuffer&) = delete;
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DmaBuffer(DmaBuffer&& other) noexcept;
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DmaBuffer& operator=(DmaBuffer&& other) noexcept;
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uint8_t* data() { return static_cast<uint8_t*>(ptr); }
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const uint8_t* data() const { return static_cast<const uint8_t*>(ptr); }
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bool valid() const { return fd >= 0 && ptr != nullptr; }
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};
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using DmaBufferPtr = std::shared_ptr<DmaBuffer>;
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// Allocate DMA buffer using dma_heap
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// Returns nullptr on failure
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DmaBufferPtr DmaAlloc(size_t size);
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// Sync DMA buffer for CPU access
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void DmaSyncStart(DmaBuffer* buf);
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void DmaSyncEnd(DmaBuffer* buf);
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// Sync DMA-BUF fd for CPU access (when only fd is available on Frame)
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void DmaSyncStartFd(int fd);
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void DmaSyncEndFd(int fd);
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} // namespace rk3588
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