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>
2026-07-15 00:35:10 +02:00
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+/* Copyright (c) 2017-2026 Hans-Kristian Arntzen
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#pragma once
+
+#include "path_utils.hpp"
+#include "filesystem.hpp"
+#include "intrusive.hpp"
+#include "logging.hpp"
+#include <string>
+
+namespace Granite
+{
+template <typename T>
+class VolatileSource : public Util::IntrusivePtrEnabled<VolatileSource<T>>
+{
+public:
+	VolatileSource(Filesystem *fs_, const std::string &path_)
+		: fs(fs_), path(Path::enforce_protocol(path_))
+	{
+	}
+
+	VolatileSource() = default;
+
+	~VolatileSource()
+	{
+		deinit();
+	}
+
+protected:
+	Filesystem *fs = nullptr;
+	std::string path;
+	void deinit()
+	{
+		if (notify_backend && notify_handle >= 0)
+			notify_backend->uninstall_notification(notify_handle);
+		notify_backend = nullptr;
+		notify_handle = -1;
+	}
+
+	bool init()
+	{
+		if (path.empty() || !fs)
+			return false;
+
+		auto file = fs->open_readonly_mapping(path);
+		if (!file)
+		{
+			LOGE("Failed to open volatile file: %s\n", path.c_str());
+			return false;
+		}
+
+		auto *self = static_cast<T *>(this);
+		self->update(std::move(file));
+
+		auto paths = Path::protocol_split(path);
+		auto *proto = fs->get_backend(paths.first);
+		if (proto)
+		{
+			// Listen to directory so we can track file moves properly.
+			notify_handle = proto->install_notification(Path::basedir(paths.second), [&](const FileNotifyInfo &info) {
+				if (info.type == FileNotifyType::FileDeleted)
+					return;
+				if (info.path != path)
+					return;
+
+				try
+				{
+					auto f = fs->open_readonly_mapping(info.path);
+					if (!f)
+						return;
+					auto *s = static_cast<T *>(this);
+					s->update(std::move(f));
+				}
+				catch (const std::exception &e)
+				{
+					LOGE("Caught update exception: %s\n", e.what());
+				}
+			});
+		}
+
+		return true;
+	}
+
+private:
+	FileNotifyHandle notify_handle = -1;
+	FilesystemBackend *notify_backend = nullptr;
+};
+
+template <typename T>
+using VolatileHandle = Util::IntrusivePtr<VolatileSource<T>>;
+}