Centralize default values into an instance of config. For #64

config/defaults.go

@@ -0,0 +1,40 @@
+package config
+
+import (
+	"log"
+	"os/exec"
+	"strings"
+)
+
+func getDefaults() config {
+	defaults := config{}
+	defaults.WebServerPort = 8080
+	defaults.FFMpegPath = getDefaultFFMpegPath()
+	defaults.VideoSettings.ChunkLengthInSeconds = 4
+	defaults.Files.MaxNumberInPlaylist = 5
+	defaults.PublicHLSPath = "webroot/hls"
+	defaults.PrivateHLSPath = "hls"
+	defaults.VideoSettings.OfflineContent = "static/offline.m4v"
+	defaults.InstanceDetails.ExtraInfoFile = "/static/content.md"
+
+	defaultQuality := StreamQuality{
+		IsAudioPassthrough: true,
+		VideoBitrate:       1200,
+		EncoderPreset:      "veryfast",
+	}
+	defaults.VideoSettings.StreamQualities = []StreamQuality{defaultQuality}
+
+	return defaults
+}
+
+func getDefaultFFMpegPath() string {
+	cmd := exec.Command("which", "ffmpeg")
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		log.Panicln("Unable to determine path to ffmpeg. Please specify it in the config file.")
+	}
+
+	path := strings.TrimSpace(string(out))
+
+	return path
+}