loader.go RawHistoryFolder

1package loader
2
3import (
4	"fmt"
5	"os"
6	"path/filepath"
7
8	"github.com/ebitengine/purego"
9)
10
11type Handles struct {
12	PipeWire uintptr
13}
14
15// Open loads the PipeWire library with RTLD_GLOBAL so plugins can resolve symbols.
16// Falls back to system library paths unless PIPEWIRE_LIB_PATH is set.
17func Open() (Handles, error) {
18	pw, err := openOne(resolveLib("PIPEWIRE_LIB_PATH", libFileName("libpipewire-0.3", "0")))
19	if err != nil {
20		return Handles{}, err
21	}
22	return Handles{PipeWire: pw}, nil
23}
24
25func openOne(path string) (uintptr, error) {
26	// RTLD_GLOBAL is required: PipeWire plugins need to resolve symbols from the main library.
27	h, err := purego.Dlopen(path, purego.RTLD_NOW|purego.RTLD_GLOBAL)
28	if err != nil {
29		return 0, fmt.Errorf("dlopen %s: %w", path, err)
30	}
31	return h, nil
32}
33
34func resolveLib(envName, fallback string) string {
35	if v := os.Getenv(envName); v != "" {
36		return v
37	}
38	return fallback
39}
40
41func libFileName(base, soversion string) string {
42	return filepath.Base(base) + ".so." + soversion
43}