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Zero-copy capture->encode on the GPU via the raw NVENC API (nvidia_video_codec_sdk sys + ENCODE_API; the safe wrapper is CUDA-only). Opens an NV_ENC_DEVICE_TYPE_DIRECTX session on the SAME ID3D11Device as the DXGI capturer (carried on the new FramePayload::D3d11), registers a pool of BGRA textures once, CopyResources each captured texture in and encode_picture; CBR/ULL, infinite GOP, P-only, forced-IDR for RFI. The DXGI capturer gains a D3D11 zero-copy output (selected, like the encoder, by PUNKTFUNK_ENCODER=nvenc) so capture+encode share textures. OFF by default (the nvenc feature pulls the NVENC SDK + cudarc): the default Windows host links without it (openh264 path). cudarc builds toolkit-less via the SDK ci-check feature (dynamic-loading). At link time --features nvenc needs nvencodeapi.lib (NVENC SDK, or an import lib generated from the driver's nvEncodeAPI64.dll) on PUNKTFUNK_NVENC_LIB_DIR. Both default and --features nvenc builds validated to compile+link GPU-less on the VM (import lib generated from the driver DLL). Runtime needs a real NVIDIA GPU. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
17 lines
998 B
Rust
17 lines
998 B
Rust
//! Build script. The only thing it does: with the `nvenc` feature (Windows GPU host), tell the
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//! linker to pull the NVENC import library. The NVENC entry points
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//! (`NvEncodeAPICreateInstance` / `NvEncodeAPIGetMaxSupportedVersion`) live in `nvEncodeAPI64.dll`
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//! (shipped with the NVIDIA driver), so the host links against `nvencodeapi.lib`. Point
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//! `PUNKTFUNK_NVENC_LIB_DIR` at a directory containing `nvencodeapi.lib` — from the NVIDIA Video
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//! Codec SDK, or an import lib generated from the driver's `nvEncodeAPI64.dll`
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//! (`lib /def:nvenc.def /machine:x64 /out:nvencodeapi.lib` with the two exports above).
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fn main() {
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if std::env::var_os("CARGO_FEATURE_NVENC").is_some() {
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if let Some(dir) = std::env::var_os("PUNKTFUNK_NVENC_LIB_DIR") {
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println!("cargo:rustc-link-search=native={}", dir.to_string_lossy());
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}
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println!("cargo:rustc-link-lib=dylib=nvencodeapi");
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println!("cargo:rerun-if-env-changed=PUNKTFUNK_NVENC_LIB_DIR");
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}
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}
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