internal/pipewire: add type constants

This change also centralises encoding testing.

Signed-off-by: Ophestra <cat@gensokyo.uk>

1 files changed, 133 insertions, 0 deletions

diff --git a/internal/pipewire/pod.go b/internal/pipewire/pod.go
new file mode 100644
index 00000000..7c01543d
--- /dev/null
+++ b/internal/pipewire/pod.go
@@ -0,0 +1,133 @@
+package pipewire
+
+type (
+	// A Word is a 32-bit unsigned integer.
+	//
+	// Values internal to a message appear to always be aligned to 32-bit boundary.
+	Word = uint32
+
+	// An Int is a signed integer the size of a PipeWire Word.
+	Int = int32
+	// An Uint is an unsigned integer the size of a PipeWire Word.
+	Uint = Word
+)
+
+/* Basic types */
+const (
+	/* POD's can contain a number of basic SPA types: */
+
+	SPA_TYPE_START     = 0x00000 + iota
+	SPA_TYPE_None      // No value or a NULL pointer.
+	SPA_TYPE_Bool      // A boolean value.
+	SPA_TYPE_Id        // An enumerated value.
+	SPA_TYPE_Int       // An integer value, 32-bit.
+	SPA_TYPE_Long      // An integer value, 64-bit.
+	SPA_TYPE_Float     // A floating point value, 32-bit.
+	SPA_TYPE_Double    // A floating point value, 64-bit.
+	SPA_TYPE_String    // A string.
+	SPA_TYPE_Bytes     // A byte array.
+	SPA_TYPE_Rectangle // A rectangle with width and height.
+	SPA_TYPE_Fraction  // A fraction with numerator and denominator.
+	SPA_TYPE_Bitmap    // An array of bits.
+
+	/* POD's can be grouped together in these container types: */
+
+	SPA_TYPE_Array    // An array of equal sized objects.
+	SPA_TYPE_Struct   // A collection of types and objects.
+	SPA_TYPE_Object   // An object with properties.
+	SPA_TYPE_Sequence // A timed sequence of POD's.
+
+	/* POD's can also contain some extra types: */
+
+	SPA_TYPE_Pointer // A typed pointer in memory.
+	SPA_TYPE_Fd      // A file descriptor.
+	SPA_TYPE_Choice  // A choice of values.
+	SPA_TYPE_Pod     // A generic type for the POD itself.
+
+	_SPA_TYPE_LAST // not part of ABI
+)
+
+/* Pointers */
+const (
+	SPA_TYPE_POINTER_START = 0x10000 + iota
+	SPA_TYPE_POINTER_Buffer
+	SPA_TYPE_POINTER_Meta
+	SPA_TYPE_POINTER_Dict
+
+	_SPA_TYPE_POINTER_LAST // not part of ABI
+)
+
+/* Events */
+const (
+	SPA_TYPE_EVENT_START = 0x20000 + iota
+	SPA_TYPE_EVENT_Device
+	SPA_TYPE_EVENT_Node
+
+	_SPA_TYPE_EVENT_LAST // not part of ABI
+)
+
+/* Commands */
+const (
+	SPA_TYPE_COMMAND_START = 0x30000 + iota
+	SPA_TYPE_COMMAND_Device
+	SPA_TYPE_COMMAND_Node
+
+	_SPA_TYPE_COMMAND_LAST // not part of ABI
+)
+
+/* Objects */
+const (
+	SPA_TYPE_OBJECT_START = 0x40000 + iota
+	SPA_TYPE_OBJECT_PropInfo
+	SPA_TYPE_OBJECT_Props
+	SPA_TYPE_OBJECT_Format
+	SPA_TYPE_OBJECT_ParamBuffers
+	SPA_TYPE_OBJECT_ParamMeta
+	SPA_TYPE_OBJECT_ParamIO
+	SPA_TYPE_OBJECT_ParamProfile
+	SPA_TYPE_OBJECT_ParamPortConfig
+	SPA_TYPE_OBJECT_ParamRoute
+	SPA_TYPE_OBJECT_Profiler
+	SPA_TYPE_OBJECT_ParamLatency
+	SPA_TYPE_OBJECT_ParamProcessLatency
+	SPA_TYPE_OBJECT_ParamTag
+	_SPA_TYPE_OBJECT_LAST // not part of ABI
+)
+
+/* vendor extensions */
+const (
+	SPA_TYPE_VENDOR_PipeWire = 0x02000000
+
+	SPA_TYPE_VENDOR_Other = 0x7f000000
+)
+
+const (
+	SPA_TYPE_INFO_BASE = "Spa:"
+
+	SPA_TYPE_INFO_Flags      = SPA_TYPE_INFO_BASE + "Flags"
+	SPA_TYPE_INFO_FLAGS_BASE = SPA_TYPE_INFO_Flags + ":"
+
+	SPA_TYPE_INFO_Enum      = SPA_TYPE_INFO_BASE + "Enum"
+	SPA_TYPE_INFO_ENUM_BASE = SPA_TYPE_INFO_Enum + ":"
+
+	SPA_TYPE_INFO_Pod      = SPA_TYPE_INFO_BASE + "Pod"
+	SPA_TYPE_INFO_POD_BASE = SPA_TYPE_INFO_Pod + ":"
+
+	SPA_TYPE_INFO_Struct      = SPA_TYPE_INFO_POD_BASE + "Struct"
+	SPA_TYPE_INFO_STRUCT_BASE = SPA_TYPE_INFO_Struct + ":"
+
+	SPA_TYPE_INFO_Object      = SPA_TYPE_INFO_POD_BASE + "Object"
+	SPA_TYPE_INFO_OBJECT_BASE = SPA_TYPE_INFO_Object + ":"
+
+	SPA_TYPE_INFO_Pointer      = SPA_TYPE_INFO_BASE + "Pointer"
+	SPA_TYPE_INFO_POINTER_BASE = SPA_TYPE_INFO_Pointer + ":"
+
+	SPA_TYPE_INFO_Interface      = SPA_TYPE_INFO_POINTER_BASE + "Interface"
+	SPA_TYPE_INFO_INTERFACE_BASE = SPA_TYPE_INFO_Interface + ":"
+
+	SPA_TYPE_INFO_Event      = SPA_TYPE_INFO_OBJECT_BASE + "Event"
+	SPA_TYPE_INFO_EVENT_BASE = SPA_TYPE_INFO_Event + ":"
+
+	SPA_TYPE_INFO_Command      = SPA_TYPE_INFO_OBJECT_BASE + "Command"
+	SPA_TYPE_INFO_COMMAND_BASE = SPA_TYPE_INFO_Command + ":"
+)