From 5bcafcf73421cfdd8c80a0a0daec9ac09d8784e2 Mon Sep 17 00:00:00 2001
From: Ophestra <cat@gensokyo.uk>
Date: Mon, 24 Nov 2025 23:29:06 +0900
Subject: internal/pipewire: implement Core::Hello

This implements enough types to correctly marshal and unmarshal Core::Hello.

Signed-off-by: Ophestra <cat@gensokyo.uk>
---
 internal/pipewire/core.go | 79 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 internal/pipewire/core.go

(limited to 'internal/pipewire/core.go')

diff --git a/internal/pipewire/core.go b/internal/pipewire/core.go
new file mode 100644
index 00000000..a833009f
--- /dev/null
+++ b/internal/pipewire/core.go
@@ -0,0 +1,79 @@
+package pipewire
+
+/* pipewire/core.h */
+
+const (
+	PW_TYPE_INTERFACE_Core     = PW_TYPE_INFO_INTERFACE_BASE + "Core"
+	PW_TYPE_INTERFACE_Registry = PW_TYPE_INFO_INTERFACE_BASE + "Registry"
+	PW_CORE_PERM_MASK          = PW_PERM_R | PW_PERM_X | PW_PERM_M
+	PW_VERSION_CORE            = 4
+	PW_VERSION_REGISTRY        = 3
+
+	PW_DEFAULT_REMOTE = "pipewire-0"
+	PW_ID_CORE        = 0
+	PW_ID_ANY         = Word(0xffffffff)
+)
+
+const (
+	PW_CORE_CHANGE_MASK_PROPS = 1 << iota
+
+	PW_CORE_CHANGE_MASK_ALL = 1<<iota - 1
+)
+
+const (
+	PW_CORE_EVENT_INFO = iota
+	PW_CORE_EVENT_DONE
+	PW_CORE_EVENT_PING
+	PW_CORE_EVENT_ERROR
+	PW_CORE_EVENT_REMOVE_ID
+	PW_CORE_EVENT_BOUND_ID
+	PW_CORE_EVENT_ADD_MEM
+	PW_CORE_EVENT_REMOVE_MEM
+	PW_CORE_EVENT_BOUND_PROPS
+	PW_CORE_EVENT_NUM
+
+	PW_VERSION_CORE_EVENTS = 1
+)
+
+const (
+	PW_CORE_METHOD_ADD_LISTENER = iota
+	PW_CORE_METHOD_HELLO
+	PW_CORE_METHOD_SYNC
+	PW_CORE_METHOD_PONG
+	PW_CORE_METHOD_ERROR
+	PW_CORE_METHOD_GET_REGISTRY
+	PW_CORE_METHOD_CREATE_OBJECT
+	PW_CORE_METHOD_DESTROY
+	PW_CORE_METHOD_NUM
+
+	PW_VERSION_CORE_METHODS = 0
+)
+
+const (
+	PW_REGISTRY_EVENT_GLOBAL = iota
+	PW_REGISTRY_EVENT_GLOBAL_REMOVE
+	PW_REGISTRY_EVENT_NUM
+
+	PW_VERSION_REGISTRY_EVENTS = 0
+)
+
+const (
+	PW_REGISTRY_METHOD_ADD_LISTENER = iota
+	PW_REGISTRY_METHOD_BIND
+	PW_REGISTRY_METHOD_DESTROY
+	PW_REGISTRY_METHOD_NUM
+
+	PW_VERSION_REGISTRY_METHODS = 0
+)
+
+// CoreHello is the first message sent by a client.
+type CoreHello struct {
+	// version number of the client; PW_VERSION_CORE
+	Version Int
+}
+
+// MarshalBinary satisfies [encoding.BinaryMarshaler] via [MarshalAppend].
+func (c *CoreHello) MarshalBinary() ([]byte, error) { return MarshalAppend(make([]byte, 0, 24), c) }
+
+// UnmarshalBinary satisfies [encoding.BinaryUnmarshaler] via [Unmarshal].
+func (c *CoreHello) UnmarshalBinary(data []byte) error { return Unmarshal(data, c) }
-- 
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