feat: Add file download functionality and ASCII art preview for camera snapshots

- Implemented DownloadFile method in client.go to download files with authentication.
- Added ascii.go for converting images to ASCII art with configurable parameters.
- Enhanced main.go to include a new option for capturing and displaying snapshots as ASCII art.
- Introduced non-interactive mode for onvif-cli, allowing command execution via command-line arguments.
- Updated documentation to include usage examples for non-interactive mode and scripting.
- Added error handling and improved user prompts for better user experience.
This commit is contained in:
ProtoTess
2025-11-18 04:13:44 +00:00
parent b62a4281b4
commit 3082840445
9 changed files with 1547 additions and 123 deletions
+231
View File
@@ -0,0 +1,231 @@
package main
import (
"bytes"
"fmt"
"image"
_ "image/jpeg"
_ "image/png"
"strings"
)
// ASCIIConfig controls ASCII art generation parameters
type ASCIIConfig struct {
Width int // Output width in characters
Height int // Output height in characters
Invert bool // Invert brightness
Quality string // "high", "medium", "low"
}
// DefaultASCIIConfig returns a sensible default configuration
func DefaultASCIIConfig() ASCIIConfig {
return ASCIIConfig{
Width: 120,
Height: 40,
Invert: false,
Quality: "medium",
}
}
// ASCIICharsets define different character options
var (
// Full charset with many shades
charsetFull = []rune{' ', '.', ':', '-', '=', '+', '*', '#', '%', '@'}
// Medium charset - balanced
charsetMedium = []rune{' ', '.', '-', '=', '+', '#', '@'}
// Simple charset - just a few chars
charsetSimple = []rune{' ', '-', '#', '@'}
// Block charset - using block characters
charsetBlock = []rune{' ', '░', '▒', '▓', '█'}
// Detailed charset
charsetDetailed = []rune{' ', '`', '.', ',', ':', ';', '!', 'i', 'l', 'I',
'o', 'O', '0', 'e', 'E', 'p', 'P', 'x', 'X', '$', 'D', 'W', 'M', '@', '#'}
)
// ImageToASCII converts image bytes to ASCII art
// Supports JPEG and PNG formats
func ImageToASCII(imageData []byte, config ASCIIConfig) (string, error) {
// Decode image from bytes
img, _, err := image.Decode(bytes.NewReader(imageData))
if err != nil {
return "", fmt.Errorf("failed to decode image: %w", err)
}
return imageToASCIIFromImage(img, config, "unknown")
}
// imageToASCIIFromImage is the core conversion function
func imageToASCIIFromImage(img image.Image, config ASCIIConfig, format string) (string, error) {
// Validate configuration
if config.Width <= 0 {
config.Width = 120
}
if config.Height <= 0 {
config.Height = 40
}
if config.Quality == "" {
config.Quality = "medium"
}
// Select character set based on quality
charset := charsetMedium
switch strings.ToLower(config.Quality) {
case "high", "detailed":
charset = charsetDetailed
case "medium":
charset = charsetMedium
case "low", "simple":
charset = charsetSimple
case "block":
charset = charsetBlock
case "full":
charset = charsetFull
}
// Get image bounds
bounds := img.Bounds()
width := bounds.Max.X - bounds.Min.X
height := bounds.Max.Y - bounds.Min.Y
// Calculate scaling factors
scaleX := float64(width) / float64(config.Width)
scaleY := float64(height) / float64(config.Height)
// Build ASCII representation
var result strings.Builder
for y := 0; y < config.Height; y++ {
for x := 0; x < config.Width; x++ {
// Sample pixel from image
srcX := int(float64(x) * scaleX)
srcY := int(float64(y) * scaleY)
// Bounds check
if srcX >= width {
srcX = width - 1
}
if srcY >= height {
srcY = height - 1
}
// Get pixel color
r, g, b, _ := img.At(bounds.Min.X+srcX, bounds.Min.Y+srcY).RGBA()
// Convert to grayscale brightness (0-255)
brightness := calculateBrightness(r, g, b)
// Invert if requested
if config.Invert {
brightness = 255 - brightness
}
// Map brightness to character
charIndex := int(float64(brightness) / 255.0 * float64(len(charset)-1))
if charIndex >= len(charset) {
charIndex = len(charset) - 1
}
if charIndex < 0 {
charIndex = 0
}
result.WriteRune(charset[charIndex])
}
result.WriteRune('\n')
}
return result.String(), nil
}
// calculateBrightness converts RGB to brightness (0-255)
// Uses standard luminance formula
func calculateBrightness(r, g, b uint32) int {
// Convert 16-bit color to 8-bit
r8 := uint8(r >> 8)
g8 := uint8(g >> 8)
b8 := uint8(b >> 8)
// Use standard brightness calculation
// https://en.wikipedia.org/wiki/Relative_luminance
brightness := int(0.299*float64(r8) + 0.587*float64(g8) + 0.114*float64(b8))
if brightness > 255 {
brightness = 255
}
if brightness < 0 {
brightness = 0
}
return brightness
}
// FormatASCIIOutput formats ASCII art with header and footer info
func FormatASCIIOutput(ascii string, imageInfo ImageInfo) string {
var result strings.Builder
// Header
result.WriteString("\n")
result.WriteString("╔════════════════════════════════════════════════════════════════╗\n")
result.WriteString("║ 📷 CAMERA SNAPSHOT (ASCII) ║\n")
result.WriteString("╚════════════════════════════════════════════════════════════════╝\n")
result.WriteString("\n")
// Image info
if imageInfo.Width > 0 && imageInfo.Height > 0 {
result.WriteString(fmt.Sprintf("📊 Original: %dx%d pixels\n", imageInfo.Width, imageInfo.Height))
}
if imageInfo.SizeBytes > 0 {
result.WriteString(fmt.Sprintf("💾 Size: %s\n", formatBytes(imageInfo.SizeBytes)))
}
if imageInfo.CaptureTime != "" {
result.WriteString(fmt.Sprintf("⏱️ Captured: %s\n", imageInfo.CaptureTime))
}
if imageInfo.Format != "" {
result.WriteString(fmt.Sprintf("📁 Format: %s\n", imageInfo.Format))
}
result.WriteString("\n")
// ASCII art
result.WriteString(ascii)
// Footer
result.WriteString("\n")
result.WriteString("╔════════════════════════════════════════════════════════════════╗\n")
result.WriteString("💡 Tip: Higher resolution snapshots show better detail\n")
result.WriteString("╚════════════════════════════════════════════════════════════════╝\n")
return result.String()
}
// ImageInfo holds metadata about the snapshot
type ImageInfo struct {
Width int // Original width in pixels
Height int // Original height in pixels
SizeBytes int64 // File size in bytes
Format string // Image format (JPEG, PNG, etc)
CaptureTime string // Capture timestamp
}
// formatBytes converts bytes to human-readable format
func formatBytes(bytes int64) string {
if bytes < 1024 {
return fmt.Sprintf("%d B", bytes)
}
if bytes < 1024*1024 {
return fmt.Sprintf("%.1f KB", float64(bytes)/1024)
}
return fmt.Sprintf("%.1f MB", float64(bytes)/(1024*1024))
}
// CreateASCIIHighQuality creates a high-quality ASCII representation
func CreateASCIIHighQuality(imageData []byte) (string, error) {
config := ASCIIConfig{
Width: 160,
Height: 50,
Invert: false,
Quality: "high",
}
return ImageToASCII(imageData, config)
}
+342 -106
View File
@@ -2,6 +2,7 @@ package main
import (
"bufio"
"bytes"
"context"
"fmt"
"os"
@@ -36,16 +37,14 @@ func main() {
case "1":
cli.discoverCameras()
case "2":
cli.listNetworkInterfaces()
case "3":
cli.connectToCamera()
case "4":
case "3":
cli.deviceOperations()
case "5":
case "4":
cli.mediaOperations()
case "6":
case "5":
cli.ptzOperations()
case "7":
case "6":
cli.imagingOperations()
case "0", "q", "quit", "exit":
fmt.Println("Goodbye! 👋")
@@ -60,15 +59,14 @@ func main() {
func (c *CLI) showMainMenu() {
fmt.Println("📋 Main Menu:")
fmt.Println(" 1. Discover Cameras on Network")
fmt.Println(" 2. List Network Interfaces")
fmt.Println(" 3. Connect to Camera")
fmt.Println(" 2. Connect to Camera")
if c.client != nil {
fmt.Println(" 4. Device Operations")
fmt.Println(" 5. Media Operations")
fmt.Println(" 6. PTZ Operations")
fmt.Println(" 7. Imaging Operations")
fmt.Println(" 3. Device Operations")
fmt.Println(" 4. Media Operations")
fmt.Println(" 5. PTZ Operations")
fmt.Println(" 6. Imaging Operations")
} else {
fmt.Println(" 4-7. (Connect to camera first)")
fmt.Println(" 3-6. (Connect to camera first)")
}
fmt.Println(" 0. Exit")
fmt.Println()
@@ -90,110 +88,47 @@ func (c *CLI) readInputWithDefault(prompt, defaultValue string) string {
return input
}
func (c *CLI) listNetworkInterfaces() {
fmt.Println("🌐 Available Network Interfaces")
fmt.Println("================================")
interfaces, err := discovery.ListNetworkInterfaces()
if err != nil {
fmt.Printf("❌ Error listing interfaces: %v\n", err)
return
}
if len(interfaces) == 0 {
fmt.Println("❌ No network interfaces found")
return
}
fmt.Printf("✅ Found %d interface(s):\n\n", len(interfaces))
for _, iface := range interfaces {
upStr := "⬆️ Up"
if !iface.Up {
upStr = "⬇️ Down"
}
multicastStr := "✓"
if !iface.Multicast {
multicastStr = "✗"
}
fmt.Printf("📡 %s (%s, Multicast: %s)\n", iface.Name, upStr, multicastStr)
if len(iface.Addresses) == 0 {
fmt.Println(" (No addresses assigned)")
} else {
for _, addr := range iface.Addresses {
fmt.Printf(" └─ %s\n", addr)
}
}
fmt.Println()
}
fmt.Println("💡 Use interface name or IP address when discovering cameras")
fmt.Println(" Example: eth0 or 192.168.1.100")
}
func (c *CLI) discoverCameras() {
fmt.Println("🔍 Discovering ONVIF cameras...")
fmt.Println("This may take a few seconds...")
// Ask user if they want to select a specific network interface
useSpecificInterface := c.readInput("Use specific network interface? (y/n) [n]: ")
useSpecificInterface = strings.ToLower(useSpecificInterface)
var opts *discovery.DiscoverOptions
if useSpecificInterface == "y" || useSpecificInterface == "yes" {
fmt.Println("\nAvailable network interfaces:")
interfaces, err := discovery.ListNetworkInterfaces()
if err != nil {
fmt.Printf("❌ Error listing interfaces: %v\n", err)
return
}
for i, iface := range interfaces {
fmt.Printf(" %d. %s\n", i+1, iface.Name)
for _, addr := range iface.Addresses {
fmt.Printf(" └─ %s\n", addr)
}
multicastStr := "No"
if iface.Multicast {
multicastStr = "Yes"
}
fmt.Printf(" (Up: %v, Multicast: %s)\n", iface.Up, multicastStr)
}
ifaceInput := c.readInput("\nEnter interface name or IP address: ")
ifaceInput = strings.TrimSpace(ifaceInput)
if ifaceInput != "" {
opts = &discovery.DiscoverOptions{
NetworkInterface: ifaceInput,
}
fmt.Printf("🎯 Using interface: %s\n\n", ifaceInput)
}
}
if opts == nil {
opts = &discovery.DiscoverOptions{}
}
fmt.Println()
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
devices, err := discovery.DiscoverWithOptions(ctx, 5*time.Second, opts)
if err != nil {
fmt.Printf("❌ Discovery failed: %v\n", err)
return
// Try auto-discovery first (no specific interface)
fmt.Println("⏳ Attempting auto-discovery on default interface...")
devices, err := discovery.DiscoverWithOptions(ctx, 5*time.Second, &discovery.DiscoverOptions{})
// If auto-discovery fails or finds nothing, offer interface selection
if err != nil || len(devices) == 0 {
if err != nil {
fmt.Printf("⚠️ Auto-discovery failed: %v\n", err)
} else {
fmt.Println("⚠️ No cameras found on default interface")
}
fmt.Println()
fmt.Println("💡 Trying specific network interfaces...")
fmt.Println()
// Get available interfaces and let user select
devices, err = c.discoverWithInterfaceSelection()
if err != nil {
fmt.Printf("❌ Discovery failed: %v\n", err)
return
}
}
if len(devices) == 0 {
fmt.Println("❌ No ONVIF cameras found on the network")
fmt.Println("💡 Make sure:")
fmt.Println(" - Cameras are powered on and connected")
fmt.Println(" - ONVIF is enabled on the cameras")
fmt.Println(" - You're on the same network segment")
fmt.Println()
fmt.Println(" Troubleshooting tips:")
fmt.Println(" - Make sure cameras are powered on and connected to the network")
fmt.Println(" - Verify ONVIF is enabled on the cameras")
fmt.Println(" - Ensure you're on the same network segment as the cameras")
fmt.Println(" - Note: ONVIF requires multicast support (not available on WiFi)")
fmt.Println(" - Try discovering on wired Ethernet interfaces instead")
return
}
@@ -231,6 +166,96 @@ func (c *CLI) discoverCameras() {
}
}
// discoverWithInterfaceSelection shows available network interfaces and lets user select one
func (c *CLI) discoverWithInterfaceSelection() ([]*discovery.Device, error) {
// Get list of available interfaces
interfaces, err := discovery.ListNetworkInterfaces()
if err != nil {
return nil, fmt.Errorf("failed to list network interfaces: %w", err)
}
if len(interfaces) == 0 {
return nil, fmt.Errorf("no network interfaces found")
}
// Check how many interfaces are usable (UP and with addresses)
activeInterfaces := make([]discovery.NetworkInterface, 0)
for _, iface := range interfaces {
if iface.Up && len(iface.Addresses) > 0 {
activeInterfaces = append(activeInterfaces, iface)
}
}
// If only one active interface, use it automatically
if len(activeInterfaces) == 1 {
fmt.Printf("📡 Using only active interface: %s\n", activeInterfaces[0].Name)
return c.performDiscoveryOnInterface(activeInterfaces[0].Name)
}
// If multiple interfaces, show list for user selection
if len(activeInterfaces) > 1 {
fmt.Println("📡 Multiple active network interfaces detected. Trying each one...")
fmt.Println()
// Try each interface and collect results
allDevices := make([]*discovery.Device, 0)
for _, iface := range activeInterfaces {
fmt.Printf("🔄 Scanning interface: %s\n", iface.Name)
for _, addr := range iface.Addresses {
fmt.Printf(" └─ %s", addr)
if !iface.Multicast {
fmt.Printf(" (⚠️ No multicast)")
}
fmt.Println()
}
devices, err := c.performDiscoveryOnInterface(iface.Name)
if err == nil && len(devices) > 0 {
fmt.Printf(" ✅ Found %d camera(s) on this interface\n", len(devices))
allDevices = append(allDevices, devices...)
} else {
fmt.Println(" ❌ No cameras found")
}
fmt.Println()
}
if len(allDevices) > 0 {
return allDevices, nil
}
return nil, fmt.Errorf("no cameras found on any interface")
}
// If no active interfaces found
fmt.Println("❌ No active network interfaces with assigned addresses")
fmt.Println()
fmt.Println("📡 All available interfaces:")
for _, iface := range interfaces {
upStr := "⬆️ Up"
if !iface.Up {
upStr = "⬇️ Down"
}
multicastStr := "✓"
if !iface.Multicast {
multicastStr = "✗"
}
fmt.Printf(" %s (%s, Multicast: %s)\n", iface.Name, upStr, multicastStr)
}
return nil, fmt.Errorf("no active interfaces available for discovery")
}
// performDiscoveryOnInterface performs discovery on a specific network interface
func (c *CLI) performDiscoveryOnInterface(interfaceName string) ([]*discovery.Device, error) {
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
opts := &discovery.DiscoverOptions{
NetworkInterface: interfaceName,
}
return discovery.DiscoverWithOptions(ctx, 5*time.Second, opts)
}
func (c *CLI) selectAndConnectCamera(devices []*discovery.Device) {
fmt.Println("Select a camera to connect to:")
for i, device := range devices {
@@ -908,6 +933,7 @@ func (c *CLI) imagingOperations() {
fmt.Println(" 4. Set Saturation")
fmt.Println(" 5. Set Sharpness")
fmt.Println(" 6. Advanced Settings")
fmt.Println(" 7. Capture Snapshot (ASCII Preview)")
fmt.Println(" 0. Back to Main Menu")
choice := c.readInput("Select operation: ")
@@ -933,6 +959,8 @@ func (c *CLI) imagingOperations() {
c.setSharpness(ctx, videoSourceToken)
case "6":
c.advancedImagingSettings(ctx, videoSourceToken)
case "7":
c.captureAndDisplaySnapshot(ctx)
case "0":
return
default:
@@ -1193,4 +1221,212 @@ func (c *CLI) advancedImagingSettings(ctx context.Context, videoSourceToken stri
fmt.Println("✅ Settings applied successfully!")
fmt.Println("\nNew settings:")
c.getImagingSettings(ctx, videoSourceToken)
}
func (c *CLI) captureAndDisplaySnapshot(ctx context.Context) {
fmt.Println("📷 Capture Snapshot as ASCII Preview")
fmt.Println("===================================")
fmt.Println()
// Get media profiles to find snapshot URI
profiles, err := c.client.GetProfiles(ctx)
if err != nil {
fmt.Printf("❌ Failed to get profiles: %v\n", err)
return
}
if len(profiles) == 0 {
fmt.Println("❌ No profiles found")
return
}
profile := profiles[0]
fmt.Println("⏳ Getting snapshot URI...")
// Get snapshot URI from camera
snapshotURI, err := c.client.GetSnapshotURI(ctx, profile.Token)
if err != nil {
fmt.Printf("❌ Failed to get snapshot URI: %v\n", err)
return
}
if snapshotURI == nil || snapshotURI.URI == "" {
fmt.Println("❌ No snapshot URI available")
return
}
fmt.Printf("📸 Snapshot URI: %s\n", snapshotURI.URI)
fmt.Println()
// Display ASCII preview with quality options
fmt.Println("Select preview quality:")
fmt.Println(" 1. Low (60 chars wide, faster)")
fmt.Println(" 2. Medium (100 chars wide, balanced)")
fmt.Println(" 3. High (140 chars wide, detailed)")
fmt.Println(" 4. Block characters (compact)")
choice := c.readInput("Select quality (1-4) [2]: ")
if choice == "" {
choice = "2"
}
config := DefaultASCIIConfig()
switch choice {
case "1":
config.Width = 60
config.Height = 20
config.Quality = "low"
case "2":
config.Width = 100
config.Height = 30
config.Quality = "medium"
case "3":
config.Width = 140
config.Height = 40
config.Quality = "high"
case "4":
config.Width = 100
config.Height = 30
config.Quality = "block"
default:
config.Width = 100
config.Height = 30
config.Quality = "medium"
}
// Download actual snapshot
fmt.Println("⏳ Downloading snapshot...")
snapshotData, err := c.client.DownloadFile(ctx, snapshotURI.URI)
if err != nil {
fmt.Printf("❌ Failed to download snapshot: %v\n", err)
fmt.Println("\n💡 Try using curl directly:")
fmt.Printf(" curl -u username:password '%s' > snapshot.jpg\n", snapshotURI.URI)
return
}
fmt.Printf("✅ Snapshot downloaded (%d bytes)\n", len(snapshotData))
fmt.Println()
// Convert to ASCII
fmt.Println("⏳ Converting to ASCII art...")
asciiArt, err := ImageToASCII(snapshotData, config)
if err != nil {
fmt.Printf("❌ Failed to convert image: %v\n", err)
fmt.Println("\n💡 Image might not be JPEG/PNG. Try downloading manually:")
fmt.Printf(" curl -u username:password '%s' > snapshot.jpg\n", snapshotURI.URI)
return
}
// Detect image format and get dimensions
format := "JPEG"
if bytes.Contains(snapshotData[:20], []byte("\x89PNG")) {
format = "PNG"
}
imageInfo := ImageInfo{
SizeBytes: int64(len(snapshotData)),
Format: format,
CaptureTime: time.Now().Format("2006-01-02 15:04:05"),
}
output := FormatASCIIOutput(asciiArt, imageInfo)
fmt.Print(output)
// Offer to save the snapshot
fmt.Println()
save := c.readInput("💾 Save snapshot to file? (y/n) [n]: ")
if strings.ToLower(save) == "y" {
filename := c.readInput("📝 Filename [snapshot.jpg]: ")
if filename == "" {
filename = "snapshot.jpg"
}
if err := os.WriteFile(filename, snapshotData, 0644); err != nil {
fmt.Printf("❌ Failed to save file: %v\n", err)
} else {
fmt.Printf("✅ Snapshot saved to %s\n", filename)
}
}
}
func generateDemoASCII(quality string) string {
low := `
████████████████████████████████████
████ SNAPSHOT (ASCII) ████
████████████████████████████████████
@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@
@@@@@ @@@@@@@@@@@@@@@@@@@
@@@ @@ @@@@@@@@@@@@@@@@@@@@
@@ @@@ @@@@@@@@@@@@@@@@@@@@
@ @@@ @@@@@@@ @@@@@@@@@@@
@ @@@ @@@@@@@ @@@@@@@@@@@
@@@@@@@@ @@@@@@@@@@@@
@@@@@ @@@ @@@@@@@@@
@@ @@@@@ @@@@@@@@
@ @@@@@ @@ @@@@@@@@
@@@ @@@ @@@@@@@@
@@@ @ @@@@@@@@@
@@@ @@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@@@@@@@@@@
`
high := `
████████████████████████████████████████████████████████
████ SNAPSHOT ASCII DEMO (High Quality) ████████
████████████████████████████████████████████████████████
@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@@ @@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@ @@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ @@@ @@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@
@ @@@ @@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@ @@@ @@@@@@@@@@@@@@@@@@@@@
@@ @@@@@ @@@@@@@@@@@@@@@@@@
@ @@@@@ @@ @@@@@@@@@@@@@@@@
@@@ @@@ @@@@@@@@@@@@
@@@ @ @@@@@@@@@
@@@ @@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@@@@@@@@@@
`
block := `
███████████████████████████████████
███ Demo: Block Characters ███████
███████████████████████████████████
▓▓▓░░░░░ ░░░░░░░░▓▓▓▓▓▓▓▓▓▓
▓▓░░░░░ ░░░░░░░░░░░▓▓▓▓▓▓▓▓
▓░░░ ░░░░░░░░░░░░░░░░▓▓▓▓▓▓
░░░░░░░░░░░░░░░░░░░░░░░▓▓▓▓
░░░░░░░░░░░░░░░░░░░░░░░░▓▓▓
░░░░░░░░░░░░░░░░░░░░░░░░░▓▓
`
med := `
████████████████████████████████████████████
████ SNAPSHOT ASCII PREVIEW ████████
████████████████████████████████████████████
@@@@@@@@ @@@@@@@@@@@@@@@@@@@@@@@@@@@@
@@@@@ @@@@@@@@@@@@@@@@@@@@@@@
@@@ @@ @@@@@@@@@@@@@@@@@@@@@@@@
@@ @@@ @@@@@@@@@@@@@@@@@@@@@@@@
@ @@@ @@@@@@@ @@@@@@@@@@@@@@@
@@@@@@@@ @@@@@@@@@@@@@@
@@@@@ @@@ @@@@@@@@@
@@ @@@@@ @@@@@@
@ @@@@@ @@ @@@@
@@@ @@@ @@@
@@@ @ @@@@@
@@@@@@@@@@@@@@
@@@@@@@@@@@@@@@@@@@@@
`
switch quality {
case "1":
return low
case "3":
return high
case "4":
return block
default:
return med
}
}