Added project files

core/naive_m3u8_parser.go

@@ -0,0 +1,67 @@
+// Copyright (c) 2025, Julian Müller (ChaoticByte)
+
+package core
+
+import (
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+var availFormatsRegex = regexp.MustCompile(`NAME="(.+)"`)
+
+func parseAvailFormatsFromM3u8(m3u8 string) []VideoFormat {
+	foundFormats := []VideoFormat{}
+	m3u8 = strings.ReplaceAll(m3u8, "\r", "")
+	parts := strings.Split(m3u8, "#EXT-X-STREAM-INF")
+	for _, p := range parts {
+		p := strings.Trim(p, " \n")
+		if strings.HasPrefix(p, ":") && strings.Contains(p, "RESOLUTION=") && strings.Contains(p, "FRAMERATE=") && strings.Contains(p, "NAME=") {
+			format := VideoFormat{}
+			plItem := strings.Split(p, "\n")
+			if len(plItem) < 2 {
+				continue
+			}
+			formatName := availFormatsRegex.FindStringSubmatch(plItem[0])
+			if formatName == nil {
+				continue // didn't find format
+			}
+			format.Name = formatName[1]
+			format.Url = plItem[1]
+			foundFormats = append(foundFormats, format)
+		}
+	}
+	return foundFormats
+}
+
+var targetDurationRegex = regexp.MustCompile(`#EXT-X-TARGETDURATION:(.+)`)
+
+func parseChunkListFromM3u8(m3u8 string, baseurl string) (ChunkList, error) {
+	chunklist := ChunkList{BaseUrl: baseurl}
+	m3u8 = strings.ReplaceAll(m3u8, "\r", "")
+	parts := strings.Split(m3u8, "#EXTINF")
+	for _, p := range parts {
+		if strings.HasPrefix(p, "#EXTM3U") {
+			lines := strings.Split(p, "\n")
+			for _, l := range lines {
+				if strings.HasPrefix(l, "#EXT-X-TARGETDURATION") {
+					targetDuration := targetDurationRegex.FindStringSubmatch(l)
+					if targetDuration == nil {
+						continue
+					}
+					chunkDuration, err := strconv.ParseFloat(targetDuration[1], 64)
+					if err != nil {
+						return chunklist, err
+					}
+					chunklist.ChunkDuration = chunkDuration
+				}
+			}
+		} else if strings.HasPrefix(p, ":") {
+			lines := strings.Split(p, "\n")
+			if len(lines) > 1 {
+				chunklist.Chunks = append(chunklist.Chunks, lines[1])
+			}
+		}
+	}
+	return chunklist, nil
+}