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event.go
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event.go
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// This work is subject to the CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
// license. Its contents can be found at:
// http://creativecommons.org/publicdomain/zero/1.0
package vlc
//#include <stdlib.h>
//#include <vlc/vlc.h>
import "C"
import (
"bytes"
"encoding/binary"
"unsafe"
)
// Generic event type. Use a switch on Event.Type to determine which method
// to call for its data. The method names are the same as the event type.
// It's a bit of an odd way to handle this, but since event data comes in the
// form of a C union, there is some binary magic that has to be performed based
// on the event type.
type Event struct {
Type EventType
b bytes.Buffer
}
func (this *Event) MediaMetaChanged() MetaProperty { return MetaProperty(this.readU32()) }
func (this *Event) MediaSubItemAdded() *Media { return this.readMedia() }
func (this *Event) MediaDurationChanged() int64 { return this.readI64() }
func (this *Event) MediaParsedChanged() int { return int(this.readI32()) }
func (this *Event) MediaFreed() *Media { return this.readMedia() }
func (this *Event) MediaStateChanged() MediaState { return MediaState(this.readU32()) }
func (this *Event) MediaPlayerTimeChanged() int64 { return this.readI64() }
func (this *Event) MediaPlayerPositionChanged() float32 { return this.readF32() }
func (this *Event) MediaPlayerSeekableChanged() bool { return this.readB() }
func (this *Event) MediaPlayerTitleChanged() bool { return this.readB() }
func (this *Event) MediaPlayerLengthChanged() bool { return this.readB() }
func (this *Event) MediaPlayerSnapshotTaken() string { return this.readS() }
func (this *Event) MediaListItemAdded() *Media { return this.readMedia() }
func (this *Event) MediaListWillAddItem() *Media { return this.readMedia() }
func (this *Event) MediaListItemDeleted() *Media { return this.readMedia() }
func (this *Event) MediaListWillDeleteItem() *Media { return this.readMedia() }
func (this *Event) MediaListPlayerNextItemSet() *Media { return this.readMedia() }
func (this *Event) VlmMediaAdded() (string, string) { return this.readS2() }
func (this *Event) VlmMediaRemoved() (string, string) { return this.readS2() }
func (this *Event) VlmMediaChanged() (string, string) { return this.readS2() }
func (this *Event) VlmMediaInstanceStarted() (string, string) { return this.readS2() }
func (this *Event) VlmMediaInstanceStopped() (string, string) { return this.readS2() }
func (this *Event) VlmMediaInstanceStatusInitAdded() (string, string) { return this.readS2() }
func (this *Event) VlmMediaInstanceStatusOpening() (string, string) { return this.readS2() }
func (this *Event) VlmMediaInstanceStatusPlaying() (string, string) { return this.readS2() }
func (this *Event) VlmMediaInstanceStatusPause() (string, string) { return this.readS2() }
func (this *Event) VlmMediaInstanceStatusEnd() (string, string) { return this.readS2() }
func (this *Event) VlmMediaInstanceStatusError() (string, string) { return this.readS2() }
func (this *Event) MediaPlayerMediaChanged() *Media { return this.readMedia() }
func (this *Event) MediaPlayerNothingSpecial() MediaState { return MediaState(this.readU32()) }
func (this *Event) MediaPlayerOpening() MediaState { return MediaState(this.readU32()) }
func (this *Event) MediaPlayerBuffering() MediaState { return MediaState(this.readU32()) }
func (this *Event) MediaPlayerPlaying() MediaState { return MediaState(this.readU32()) }
func (this *Event) MediaPlayerPaused() MediaState { return MediaState(this.readU32()) }
func (this *Event) MediaPlayerStopped() MediaState { return MediaState(this.readU32()) }
func (this *Event) MediaPlayerForward() MediaState { return MediaState(this.readU32()) }
func (this *Event) MediaPlayerBackward() MediaState { return MediaState(this.readU32()) }
func (this *Event) MediaPlayerEndReached() MediaState { return MediaState(this.readU32()) }
func (this *Event) MediaPlayerEncounteredError() MediaState { return MediaState(this.readU32()) }
func (this *Event) MediaListPlayerPlayed() MediaState { return MediaState(this.readU32()) }
func (this *Event) MediaListPlayerStopped() MediaState { return MediaState(this.readU32()) }
func (this *Event) MediaListViewItemAdded() *Media { return this.readMedia() }
func (this *Event) MediaListViewWillAddItem() *Media { return this.readMedia() }
func (this *Event) MediaListViewItemDeleted() *Media { return this.readMedia() }
func (this *Event) MediaListViewWillDeleteItem() *Media { return this.readMedia() }
func (this *Event) MediaDiscovererStarted() *Discoverer { return this.readDiscoverer() }
func (this *Event) MediaDiscovererEnded() *Discoverer { return this.readDiscoverer() }
func (this *Event) readI8() int8 {
var i int8
binary.Read(&this.b, binary.LittleEndian, &i)
return i
}
func (this *Event) readI16() int16 {
var i int16
binary.Read(&this.b, binary.LittleEndian, &i)
return i
}
func (this *Event) readI32() int32 {
var i int32
binary.Read(&this.b, binary.LittleEndian, &i)
return i
}
func (this *Event) readI64() int64 {
var i int64
binary.Read(&this.b, binary.LittleEndian, &i)
return i
}
func (this *Event) readU8() uint8 {
var i uint8
binary.Read(&this.b, binary.LittleEndian, &i)
return i
}
func (this *Event) readU16() uint16 {
var i uint16
binary.Read(&this.b, binary.LittleEndian, &i)
return i
}
func (this *Event) readU32() uint32 {
var i uint32
binary.Read(&this.b, binary.LittleEndian, &i)
return i
}
func (this *Event) readU64() uint64 {
var i uint64
binary.Read(&this.b, binary.LittleEndian, &i)
return i
}
func (this *Event) readF32() float32 {
var i float32
binary.Read(&this.b, binary.LittleEndian, &i)
return i
}
func (this *Event) readF64() float64 {
var i float64
binary.Read(&this.b, binary.LittleEndian, &i)
return i
}
func (this *Event) readS() string {
var i uint64
binary.Read(&this.b, binary.LittleEndian, &i)
up := unsafe.Pointer(uintptr(i))
s := C.GoString((*C.char)(up))
C.free(up)
return s
}
func (this *Event) readS2() (string, string) {
var a, b uint64
binary.Read(&this.b, binary.LittleEndian, &a)
binary.Read(&this.b, binary.LittleEndian, &b)
pa := unsafe.Pointer(uintptr(a))
pb := unsafe.Pointer(uintptr(b))
sa := C.GoString((*C.char)(pa))
sb := C.GoString((*C.char)(pb))
C.free(pa)
C.free(pb)
return sa, sb
}
func (this *Event) readB() bool {
var i int64
binary.Read(&this.b, binary.LittleEndian, &i)
return i == 0
}
func (this *Event) readMedia() *Media {
var i uint64
binary.Read(&this.b, binary.LittleEndian, &i)
return &Media{(*C.libvlc_media_t)(unsafe.Pointer(uintptr(i)))}
}
func (this *Event) readDiscoverer() *Discoverer {
var i uint64
binary.Read(&this.b, binary.LittleEndian, &i)
return &Discoverer{(*C.libvlc_media_discoverer_t)(unsafe.Pointer(uintptr(i)))}
}