commit c782d7505d2481993f034dc8c80060f1ae176698
from: Oliver Lowe <o@olowe.co>
date: Tue Apr 22 23:07:04 2025 UTC

m3u8: parse media sequence in one hit

Since we're just parsing an integer we can just try to parse the next
token from the lexer, like how we parse the playlist version.

commit - 2be3531b0dcadd5c29adc1fff94844876de00afe
commit + c782d7505d2481993f034dc8c80060f1ae176698
blob - d73bcc7147293cce0ea0a9a55185cccc5f9abd7d
blob + 20dcbafb6a363bd6b7450c989e8750e388189460
--- m3u8/parse.go
+++ m3u8/parse.go
@@ -4,7 +4,6 @@ import (
 	"errors"
 	"fmt"
 	"io"
-	"regexp"
 	"strconv"
 	"strings"
 	"time"
@@ -87,11 +86,12 @@ func Decode(rd io.Reader) (*Playlist, error) {
 			case tagEndList:
 				p.End = true
 			case tagMediaSequence:
-				val, err := parseSequence(lex)
+				it = <-lex.items
+				seq, err := strconv.Atoi(it.val)
 				if err != nil {
 					return p, fmt.Errorf("parse media sequence: %w", err)
 				}
-				p.Sequence = val
+				p.Sequence = seq
 			}
 		}
 	}
@@ -388,14 +388,3 @@ func parseByteRange(s string) (ByteRange, error) {
 	}
 	return ByteRange{n, nn}, nil
 }
-
-func parseSequence(lex *lexer) (int, error) {
-	re := regexp.MustCompile(`#EXT-X-MEDIA-SEQUENCE:(\d+)`)
-
-	match := re.FindStringSubmatch(lex.input)
-	if len(match) > 1 {
-		return strconv.Atoi(match[1])
-	}
-
-	return 0, fmt.Errorf("invalid sequence number")
-}