From e2e6a7406845e11e779696111138a7b761409377 Mon Sep 17 00:00:00 2001
From: Ben Pye <ben@curlybracket.co.uk>
Date: Tue, 20 Nov 2018 03:13:57 +0000
Subject: [PATCH] Add AudioFile cancellation

---
 src/librespot/player/audiofile.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/librespot/player/audiofile.go b/src/librespot/player/audiofile.go
index b35ce0c..fe65909 100644
--- a/src/librespot/player/audiofile.go
+++ b/src/librespot/player/audiofile.go
@@ -40,6 +40,7 @@ type AudioFile struct {
 	cursor         int
 	chunks         map[int]bool
 	chunksLoading  bool
+	cancelled      bool
 }
 
 func newAudioFile(file *Spotify.AudioFile, player *Player) *AudioFile {
@@ -155,6 +156,11 @@ func (a *AudioFile) Seek(offset int64, whence int) (int64, error) {
 	return int64(a.cursor - a.headerOffset()), nil
 }
 
+// Cancels the current audio file - no further data will be downloaded
+func (a *AudioFile) Cancel() {
+	a.cancelled = true
+}
+
 func (a *AudioFile) headerOffset() int {
 	// If the file format is an OGG, we skip the first kOggSkipBytes (167) bytes. We could implement despotify's
 	// SpotifyOggHeader (https://sourceforge.net/p/despotify/code/HEAD/tree/java/trunk/src/main/java/se/despotify/client/player/SpotifyOggHeader.java)
@@ -275,6 +281,10 @@ func (a *AudioFile) loadChunk(chunkIndex int) error {
 }
 
 func (a *AudioFile) loadNextChunk() {
+	if a.cancelled {
+		return
+	}
+
 	a.chunkLock.Lock()
 
 	if a.chunksLoading {