hls: fix error that caused primary playlist not to be served to more than 1 client

internal/hls/primaryplaylist.go

@@ -14,7 +14,7 @@ type primaryPlaylist struct {
 	audioTrack *gortsplib.Track
 	h264Conf   *gortsplib.TrackConfigH264
 
-	breader *bytes.Reader
+	cnt []byte
 }
 
 func newPrimaryPlaylist(
@@ -38,15 +38,13 @@ func newPrimaryPlaylist(
 		codecs = append(codecs, "mp4a.40.2")
 	}
 
-	cnt := "#EXTM3U\n"
-	cnt += "#EXT-X-STREAM-INF:BANDWIDTH=200000,CODECS=\"" + strings.Join(codecs, ",") + "\"\n"
-	cnt += "stream.m3u8\n"
-
-	p.breader = bytes.NewReader([]byte(cnt))
+	p.cnt = []byte("#EXTM3U\n" +
+		"#EXT-X-STREAM-INF:BANDWIDTH=200000,CODECS=\"" + strings.Join(codecs, ",") + "\"\n" +
+		"stream.m3u8\n")
 
 	return p
 }
 
 func (p *primaryPlaylist) reader() io.Reader {
-	return p.breader
+	return bytes.NewReader(p.cnt)
 }

internal/hls/streamplaylist.go

@@ -9,15 +9,14 @@ import (
 	"sync"
 )
 
-type readerFunc struct {
-	wrapped func() []byte
-	reader  *bytes.Reader
+type asyncReader struct {
+	generator func() []byte
+	reader    *bytes.Reader
 }
 
-func (r *readerFunc) Read(buf []byte) (int, error) {
+func (r *asyncReader) Read(buf []byte) (int, error) {
 	if r.reader == nil {
-		cnt := r.wrapped()
-		r.reader = bytes.NewReader(cnt)
+		r.reader = bytes.NewReader(r.generator())
 	}
 	return r.reader.Read(buf)
 }
@@ -53,7 +52,7 @@ func (p *streamPlaylist) close() {
 }
 
 func (p *streamPlaylist) reader() io.Reader {
-	return &readerFunc{wrapped: func() []byte {
+	return &asyncReader{generator: func() []byte {
 		p.mutex.Lock()
 		defer p.mutex.Unlock()