velvettear/slideshow
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code cleanup

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This commit is contained in:
Daniel Sommer 2023-11-24 16:52:11 +01:00
parent ff68336c1b
commit acc7d1513b
5 changed files with 53 additions and 73 deletions
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2
.vscode/launch.json vendored
View file

@ -10,7 +10,7 @@
"env":{
"SLIDESHOW_INTERVAL": "10",
"SLIDESHOW_DIRECTORY": "/home/velvettear/images",
"SLIDESHOW_SCANINTERVAL": "300",
"SLIDESHOW_SCANINTERVAL": "10",
"SLIDESHOW_RESOLUTION": "600x1024",
"SLIDESHOW_LOGLEVEL": "debug",
"SLIDESHOW_PALETTE": "/tmp/.slideshow.palette",

17
internal/slideshow/palette.go
View file

@ -62,23 +62,6 @@ func getColorPaletteRaw(data []byte) ([]color.Color, error) {
return colors, error
}
// extract the given amount of dominant colors of an image
func getColorPalette(image string) ([]color.Color, error) {
var colors []color.Color
if !config.IsPaletteSet() {
return colors, nil
}
timestamp := time.Now().UnixMilli()
amount := config.PaletteColors
colors, error := color_thief.GetPaletteFromFile(image, amount, config.PaletteAlgorithm)
if error != nil {
loggo.ErrorTimed("encountered an error generating the color palette from image", timestamp, "image: "+image, "colors: "+strconv.Itoa(amount))
} else {
loggo.DebugTimed("generated color palette from image", timestamp, "image: "+image, "colors: "+strconv.Itoa(amount))
}
return colors, error
}
// parse rgb color values to hex
func rgbToHex(color color.Color) string {
r, g, b, _ := color.RGBA()

67
internal/slideshow/slideshow.go
View file

@ -4,6 +4,7 @@ import (
"errors"
"image/color"
"io"
"os"
"os/exec"
"strconv"
"strings"
@ -22,9 +23,16 @@ func Start() {
loggo.Info("starting the image slideshow...", "interval: "+strconv.FormatFloat(config.Interval.Seconds(), 'f', 0, 64)+" seconds")
var sleepTime time.Duration
var loopTime time.Duration
scaleImages := config.IsResolutionSet()
for {
loopTimestamp := time.Now()
for !scanner.HasFoundImages() {
sleepTime := time.Until(scanner.GetNextScan().Add(scanner.GetLastScanDuration()))
if sleepTime <= 0 {
continue
}
loggo.Info("there have no images been found yet, waiting for " + strconv.FormatInt(sleepTime.Milliseconds(), 10) + "ms...")
time.Sleep(sleepTime)
}
var image string
var palette []color.Color
var data []byte
@ -34,70 +42,39 @@ func Start() {
break
}
}
if scaleImages {
if config.IsResolutionSet() {
tmp, error := scale(image)
if error != nil {
loggo.Error("encountered an error scaling an image", "image: "+image, error.Error())
continue
}
data = tmp
palette, _ = getColorPaletteRaw(data)
} else {
palette, _ = getColorPalette(image)
tmp, error := os.ReadFile(image)
if error != nil {
loggo.Error("encountered an erro reading an image", "image: "+image, error.Error())
continue
}
data = tmp
}
palette, _ = getColorPaletteRaw(data)
loopTime = time.Since(loopTimestamp)
if sleepTime > 0 {
loggo.Debug("sleeping for " + strconv.FormatInt(sleepTime.Milliseconds(), 10) + "ms before next image will be displayed...")
time.Sleep(sleepTime)
}
go exportPalette(palette)
if scaleImages {
error := setBackgroundPiped(data)
if error != nil {
loggo.Error("encountered an error setting the background via pipe to feh's stdin", error.Error())
}
loggo.Info("set new scaled background image", "image: "+image, "resolution: "+config.Resolution)
} else {
error := setBackgroundImage(image)
if error != nil {
loggo.Error("encountered an error setting the background image", "image: "+image, error.Error())
}
loggo.Info("set new background image", "image: "+image)
error := setBackground(data)
if error != nil {
loggo.Error("encountered an error setting the background image", error.Error())
}
loggo.Info("set new background image", "image: "+image)
sleepTime = config.Interval - loopTime
}
}
// set the background image via 'feh'
func setBackgroundImage(image string) error {
cmd := exec.Command("feh", "--no-fehbg", "--bg-fill", image)
stdout, stdoutError := cmd.StdoutPipe()
stderr, stderrError := cmd.StderrPipe()
cmd.Start()
if stdoutError != nil {
return stdoutError
}
if stderrError != nil {
return stderrError
}
_, stdoutError = io.ReadAll(stdout)
if stdoutError != nil {
return stdoutError
}
errorBytes, stderrError := io.ReadAll(stderr)
if stderrError != nil {
return stderrError
}
cmd.Wait()
error := strings.TrimSpace(string(errorBytes))
if len(error) > 0 {
return errors.New(error)
}
return nil
}
// pipe data to 'feh' via stdin to set the background image
func setBackgroundPiped(data []byte) error {
func setBackground(data []byte) error {
cmd := exec.Command("feh", "--no-fehbg", "--bg-fill", "-")
stdin, stdinError := cmd.StdinPipe()
stdout, stdoutError := cmd.StdoutPipe()

4
main.go
View file

@ -1,7 +1,6 @@
package main
import (
"sync"
"time"
"git.velvettear.de/velvettear/loggo"
@ -13,11 +12,8 @@ import (
func main() {
timestamp := time.Now().UnixMilli()
loggo.Info("slideshow is starting now...")
var waitgroup sync.WaitGroup
waitgroup.Add(1)
config.Initialize()
scanner.Initialize()
slideshow.Start()
waitgroup.Wait()
loggo.InfoTimed("slideshow is shutting down now!", timestamp)
}

36
scanner/scanner.go
View file

@ -18,6 +18,12 @@ var images []string
// temporary slice of images
var tmpImages []string
// time of next scan
var nextScan time.Time
// duration of the last scan
var lastScanDuration time.Duration
// scan the specified directories for images
func Initialize() {
directory := config.Directory
@ -29,21 +35,39 @@ func GetRandomImage() string {
return images[rand.Intn(len(images))]
}
// check if images has been found
func HasFoundImages() bool {
return len(images) > 0
}
// get the time of the next scan
func GetNextScan() time.Time {
return nextScan
}
// get the duration of the last scan
func GetLastScanDuration() time.Duration {
return lastScanDuration
}
// scan the specified directory
func scan(directory string) {
timestamp := time.Now().UnixMilli()
timestamp := time.Now()
loggo.Info("scanning directory for images and subdirectories...", "interval: "+strconv.FormatFloat(config.ScanInterval.Seconds(), 'f', 0, 64)+" seconds", "directory: "+directory)
filepath.WalkDir(directory, checkDirectory)
images = tmpImages
tmpImages = nil
loggo.InfoTimed("found "+strconv.Itoa(len(images))+" image(s)", timestamp)
go scheduleRescan(directory)
loggo.InfoTimed("found "+strconv.Itoa(len(images))+" image(s)", timestamp.UnixMilli())
lastScanDuration = time.Since(timestamp)
nextScan = time.Now().Add(config.ScanInterval)
go scheduleRescan(directory, nextScan)
}
// sleep the specified interval and then trigger a rescan of the specified directory
func scheduleRescan(directory string) {
loggo.Debug("sleeping for " + strconv.FormatInt(config.ScanInterval.Milliseconds(), 10) + "ms before next scan...")
time.Sleep(config.ScanInterval)
func scheduleRescan(directory string, timestamp time.Time) {
sleepTime := time.Until(timestamp)
loggo.Debug("sleeping for " + strconv.FormatInt(sleepTime.Milliseconds(), 10) + "ms before next scan...")
time.Sleep(sleepTime)
scan(directory)
}