Merge pull request #38 from hori-ryota/feature/bugfix-winsize-zero

Fix bug of writing vod playlist when winsize=0

writer.go

@@ -472,7 +472,7 @@ func (p *MediaPlaylist) Encode() *bytes.Buffer {
 
 	head := p.head
 	count := p.count
-	for i := uint(0); i < p.winsize && count > 0; count-- {
+	for i := uint(0); (i < p.winsize || p.winsize == 0) && count > 0; count-- {
 		seg = p.Segments[head]
 		head = (head + 1) % p.capacity
 		if seg == nil { // protection from badly filled chunklists

writer_test.go

@@ -656,6 +656,46 @@ func ExampleMediaPlaylist_String() {
 	// test01.ts
 }
 
+// Create new media playlist
+// Add two segments to media playlist
+// Print it
+func ExampleMediaPlaylist_String_Winsize0() {
+	p, _ := NewMediaPlaylist(0, 2)
+	p.Append("test01.ts", 5.0, "")
+	p.Append("test02.ts", 6.0, "")
+	fmt.Printf("%s\n", p)
+	// Output:
+	// #EXTM3U
+	// #EXT-X-VERSION:3
+	// #EXT-X-MEDIA-SEQUENCE:0
+	// #EXT-X-TARGETDURATION:6
+	// #EXTINF:5.000,
+	// test01.ts
+	// #EXTINF:6.000,
+	// test02.ts
+}
+
+// Create new media playlist
+// Add two segments to media playlist
+// Print it
+func ExampleMediaPlaylist_String_Winsize0_VOD() {
+	p, _ := NewMediaPlaylist(0, 2)
+	p.Append("test01.ts", 5.0, "")
+	p.Append("test02.ts", 6.0, "")
+	p.Close()
+	fmt.Printf("%s\n", p)
+	// Output:
+	// #EXTM3U
+	// #EXT-X-VERSION:3
+	// #EXT-X-MEDIA-SEQUENCE:0
+	// #EXT-X-TARGETDURATION:6
+	// #EXTINF:5.000,
+	// test01.ts
+	// #EXTINF:6.000,
+	// test02.ts
+	// #EXT-X-ENDLIST
+}
+
 // Create new master playlist
 // Add media playlist
 // Encode structures to HLS