feat(host): vendor PyroWave + minimal Granite subset as crates/pyrowave-sys
Phase 0 of design/pyrowave-codec-plan.md — the opt-in wired-LAN ultra-low- latency codec. Vendored at upstream 509e4f88 (API 0.4.0, Granite 44362775, volk + vulkan-headers pins in PUNKTFUNK-VENDOR.txt), pruned to the 6.6 MB the standalone no-renderer build needs; scripts/vendor-pyrowave.sh reproduces the tree (a pin bump is protocol-affecting, plan §4.2). build.rs drives the wrapper CMakeLists (static archives incl. a static C-API lib upstream only ships shared) + bindgen over pyrowave.h; Linux and Windows only, empty stub elsewhere (Apple gets a native Metal port, §4.7). Offline-safe by construction: no network, no system lib, vendored Vulkan headers — same model as the opus dep (flatpak builder has no network). Phase-0 validation on .21 (RTX 5070 Ti, driver 610.43.03): - upstream pyrowave-c-test + interop test (incl. dmabuf/DRM-modifier Vulkan<->Vulkan) pass, from the pristine AND the pruned tree - GPU kernel times at ~1.6 bpp noise: encode/decode 0.090/0.042 ms @800p, 0.146/0.067 @1080p, 0.226/0.103 @1440p, 0.477/0.201 @4K — order of magnitude under NVENC's 1-2 ms retrieve, CBR lands within ~100 B of target - cargo test -p pyrowave-sys green (static link + API-version pin check) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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/* Copyright (c) 2017-2026 Hans-Kristian Arntzen
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#ifdef _MSC_VER
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#include <intrin.h>
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#endif
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namespace Util
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{
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#ifdef __GNUC__
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#define leading_zeroes_(x) ((x) == 0 ? 32 : __builtin_clz(x))
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#define trailing_zeroes_(x) ((x) == 0 ? 32 : __builtin_ctz(x))
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#define trailing_ones_(x) __builtin_ctz(~uint32_t(x))
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#define leading_zeroes64_(x) ((x) == 0 ? 64 : __builtin_clzll(x))
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#define trailing_zeroes64_(x) ((x) == 0 ? 64 : __builtin_ctzll(x))
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#define trailing_ones64_(x) __builtin_ctzll(~uint64_t(x))
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#define popcount32_(x) __builtin_popcount(x)
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#define popcount64_(x) __builtin_popcountll(x)
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static inline uint32_t leading_zeroes(uint32_t x) { return leading_zeroes_(x); }
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static inline uint32_t trailing_zeroes(uint32_t x) { return trailing_zeroes_(x); }
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static inline uint32_t trailing_ones(uint32_t x) { return trailing_ones_(x); }
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static inline uint32_t leading_zeroes64(uint64_t x) { return leading_zeroes64_(x); }
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static inline uint32_t trailing_zeroes64(uint64_t x) { return trailing_zeroes64_(x); }
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static inline uint32_t trailing_ones64(uint64_t x) { return trailing_ones64_(x); }
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static inline uint32_t popcount32(uint32_t x) { return popcount32_(x); }
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static inline uint32_t popcount64(uint64_t x) { return popcount64_(x); }
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#elif defined(_MSC_VER)
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namespace Internal
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{
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static inline uint32_t popcount32(uint32_t x)
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{
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return __popcnt(x);
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}
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static inline uint32_t popcount64(uint64_t x)
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{
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#ifdef _WIN64
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return __popcnt64(x);
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#else
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return popcount32(uint32_t(x)) + popcount32(uint32_t(x >> 32));
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#endif
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}
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static inline uint32_t clz(uint32_t x)
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{
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unsigned long result;
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if (_BitScanReverse(&result, x))
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return 31 - result;
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else
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return 32;
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}
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static inline uint32_t ctz(uint32_t x)
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{
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unsigned long result;
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if (_BitScanForward(&result, x))
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return result;
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else
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return 32;
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}
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static inline uint32_t clz64(uint64_t x)
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{
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#ifdef _WIN64
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unsigned long result;
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if (_BitScanReverse64(&result, x))
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return 63 - result;
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else
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return 64;
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#else
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if (x > UINT32_MAX)
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return clz(uint32_t(x >> 32));
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else
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return clz(uint32_t(x)) + 32;
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#endif
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}
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static inline uint32_t ctz64(uint64_t x)
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{
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#ifdef _WIN64
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unsigned long result;
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if (_BitScanForward64(&result, x))
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return result;
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else
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return 64;
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#else
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if ((x & UINT32_MAX) != 0)
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return ctz(uint32_t(x));
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else
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return ctz(uint32_t(x >> 32)) + 32;
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#endif
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}
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}
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static inline uint32_t leading_zeroes(uint32_t x) { return Internal::clz(x); }
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static inline uint32_t trailing_zeroes(uint32_t x) { return Internal::ctz(x); }
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static inline uint32_t trailing_ones(uint32_t x) { return Internal::ctz(~x); }
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static inline uint32_t leading_zeroes64(uint64_t x) { return Internal::clz64(x); }
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static inline uint32_t trailing_zeroes64(uint64_t x) { return Internal::ctz64(x); }
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static inline uint32_t trailing_ones64(uint64_t x) { return Internal::ctz64(~x); }
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static inline uint32_t popcount32(uint32_t x) { return Internal::popcount32(x); }
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static inline uint32_t popcount64(uint64_t x) { return Internal::popcount64(x); }
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#else
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#error "Implement me."
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#endif
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template <typename T>
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inline void for_each_bit64(uint64_t value, const T &func)
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{
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while (value)
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{
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uint32_t bit = trailing_zeroes64(value);
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func(bit);
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value &= ~(1ull << bit);
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}
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}
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template <typename T>
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inline void for_each_bit(uint32_t value, const T &func)
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{
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while (value)
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{
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uint32_t bit = trailing_zeroes(value);
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func(bit);
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value &= ~(1u << bit);
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}
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}
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template <typename T>
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inline void for_each_bit_range(uint32_t value, const T &func)
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{
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if (value == ~0u)
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{
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func(0, 32);
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return;
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}
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uint32_t bit_offset = 0;
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while (value)
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{
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uint32_t bit = trailing_zeroes(value);
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bit_offset += bit;
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value >>= bit;
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uint32_t range = trailing_ones(value);
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func(bit_offset, range);
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value &= ~((1u << range) - 1);
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}
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}
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template <typename T>
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inline bool is_pow2(T value)
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{
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return (value & (value - T(1))) == T(0);
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}
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inline uint32_t next_pow2(uint32_t v)
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{
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v--;
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v |= v >> 16;
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v |= v >> 8;
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v |= v >> 4;
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v |= v >> 2;
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v |= v >> 1;
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return v + 1;
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}
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inline uint32_t prev_pow2(uint32_t v)
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{
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return next_pow2(v + 1) >> 1;
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}
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inline uint32_t floor_log2(uint32_t v)
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{
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return 31 - leading_zeroes(v);
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}
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}
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