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//go:build cgo
package libnp
// #cgo CFLAGS: -Ilibnp/include
// #cgo LDFLAGS: -lruntimeobject
// #include <np.h>
// #include <libnp/np_windows.c>
// #include <libnp/np_util.c>
import "C"
import (
"context"
"runtime"
"time"
"unsafe"
)
// dummy object to represent the global np state to destroy
var global []interface{}
func init() {
C.np_init()
global = []interface{}{}
runtime.SetFinalizer(&global, func(_ interface{}) {
C.np_destroy()
})
}
func parseArray(p **C.char, size C.size_t) []string {
if p == nil || int(size) == 0 {
return nil
}
buf := (*[1 << 30]*C.char)(unsafe.Pointer(p)) // see: https://groups.google.com/g/golang-nuts/c/sV_f0VkjZTA
b := make([]string, int(size))
for i := range b {
b[i] = C.GoString(buf[i])
}
return b
}
func parseTime(p *C.char) time.Time {
if p == nil {
return time.Time{}
}
t, err := time.Parse(time.RFC3339, C.GoString(p))
if err != nil {
return time.Time{}
}
return t
}
func getInfo(ctx context.Context) (*Info, error) {
ci := C.np_info_get()
if ci == nil {
return nil, nil
}
info := &Info{
AlbumArtists: parseArray(ci.album_artists, ci.album_artists_size),
Artists: parseArray(ci.artists, ci.artists_size),
Composers: parseArray(ci.composers, ci.composers_size),
Genres: parseArray(ci.genres, ci.genres_size),
Lyricists: parseArray(ci.lyricists, ci.lyricists_size),
Created: parseTime(ci.created),
FirstPlayed: parseTime(ci.first_played),
LastPlayed: parseTime(ci.last_played),
Album: C.GoString(ci.album),
AlbumTrackCount: int(ci.album_track_count),
ArtURL: C.GoString(ci.art_url),
BPM: int(ci.bpm),
DiscNumber: int(ci.disc_number),
Length: time.Duration(ci.length) * time.Microsecond,
PlayCount: int(ci.play_count),
Subtitle: C.GoString(ci.subtitle),
Title: C.GoString(ci.title),
TrackNumber: int(ci.track_number),
URL: C.GoString(ci.url),
PlaybackType: PlaybackType(int(ci.playback_type)),
}
C.np_info_destroy(ci)
return info, nil
}
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