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lmsmon.go
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lmsmon.go
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package main
import (
"bytes"
"encoding/json"
"fmt"
"image"
"image/color"
"image/draw"
"io"
"io/ioutil"
"math"
"math/rand"
"net/http"
"reflect"
"strconv"
"sync"
"time"
svg "github.com/ajstarks/svgo"
"github.com/disintegration/imaging"
"github.com/srwiley/oksvg"
"github.com/srwiley/rasterx"
"golang.org/x/image/font"
"golang.org/x/image/font/basicfont"
"golang.org/x/image/math/fixed"
)
// LMSDetail provides current track detail and status
type LMSDetail struct {
CanSeek int `json:"can_seek"`
CurrentTitle string `json:"current_title,omitempty"`
DigitalVolumeControl int `json:"digital_volume_control"`
Duration interface{} `json:"duration"`
MixerVolume int `json:"mixer volume"`
Mode string `json:"mode"`
PlayerConnected int `json:"player_connected"`
PlayerIP string `json:"player_ip"`
PlayerName string `json:"player_name"`
PlaylistRepeat int `json:"playlist repeat"`
PlaylistShuffle int `json:"playlist shuffle"`
PlaylistLoop []struct {
Album string `json:"album,omitempty"`
Artist string `json:"artist,omitempty"`
ArtworkURL string `json:"artwork_url"`
AlbumartistIds string `json:"albumartist_ids"`
ArtworkTrackID string `json:"artwork_track_id"`
Albumartist string `json:"albumartist,omitempty"`
Trackartist string `json:"trackartist,omitempty"`
Conductor string `json:"conductor,omitempty"`
Composer string `json:"composer,omitempty"`
Bitrate string `json:"bitrate,omitempty"`
Comment string `json:"comment,omitempty"`
Compilation string `json:"compilation,omitempty"`
Coverid string `json:"coverid"`
Duration interface{} `json:"duration"`
Genre string `json:"genre,omitempty"`
ID interface{} `json:"id"`
PlaylistIndex interface{} `json:"playlist index"`
Remote string `json:"remote,omitempty"`
Samplesize string `json:"samplesize,omitempty"`
Samplerate string `json:"samplerate,omitempty"`
RemoteTitle string `json:"remote_title"`
Title string `json:"title,omitempty"`
Tracknum string `json:"tracknum,omitempty"`
TrackartistIds string `json:"trackartist_ids"`
Type string `json:"type,omitempty"`
URL string `json:"url,omitempty"`
Year string `json:"year,omitempty"`
} `json:"playlist_loop,omitempty"`
PlaylistTimestamp float64 `json:"playlist_timestamp"`
PlaylistTracks int `json:"playlist_tracks"`
Power int `json:"power"`
Rate int `json:"rate"`
Remote int `json:"remote,omitempty"`
RemoteMeta struct {
Artist string `json:"artist,omitempty"`
Genre string `json:"genre,omitempty"`
Bitrate string `json:"bitrate"`
Coverid string `json:"coverid"`
Duration interface{} `json:"duration"`
ID interface{} `json:"id"`
URL string `json:"url,omitempty"`
Remote int `json:"remote"`
RemoteTitle string `json:"remote_title,omitempty"`
Title string `json:"title,omitempty"`
Year string `json:"year,omitempty"`
} `json:"remoteMeta,omitempty"`
SeqNo int `json:"seq_no"`
Signalstrength int `json:"signalstrength"`
Time interface{} `json:"time"`
}
//http://htmlpreview.github.io/?https://raw.githubusercontent.com/Logitech/slimserver/public/7.9/HTML/EN/html/docs/cli-api.html
// RPCError structure
type RPCError struct {
Code int `json:"code"`
Message string `json:"message"`
Data interface{} `json:"data,omitempty"`
}
// RPCRequest structure
type RPCRequest struct {
Method string `json:"method"`
Params interface{} `json:"params,omitempty"`
ID int `json:"id"`
}
// RPCResponse structure
type RPCResponse struct {
Result interface{} `json:"result,omitempty"`
Error *RPCError `json:"error,omitempty"`
ID int `json:"id"`
}
// NewRCPRequest "package" JSON RPC request
func NewRCPRequest(method string, params ...interface{}) *RPCRequest {
request := &RPCRequest{
Method: method,
Params: Params(params...),
}
return request
}
// Params sanitize and initiate a parameter structure for JSON RPC
func Params(params ...interface{}) interface{} {
var resultParams interface{}
// if params was nil skip this and p stays nil
if params != nil {
switch len(params) {
case 0: // no parameters, return nil
case 1: // one param was provided, use it directly as is, or wrap primitive types in array
if params[0] != nil {
var typeOf reflect.Type
// traverse until nil or not a pointer type
for typeOf = reflect.TypeOf(params[0]); typeOf != nil && typeOf.Kind() == reflect.Ptr; typeOf = typeOf.Elem() {
}
if typeOf != nil {
// now check if we can directly marshal the type or if it must be wrapped in an array
switch typeOf.Kind() {
// for these types we just do nothing, since value of p is already unwrapped from the array params
case reflect.Struct:
resultParams = params[0]
case reflect.Array:
resultParams = params[0]
case reflect.Slice:
resultParams = params[0]
case reflect.Interface:
resultParams = params[0]
case reflect.Map:
resultParams = params[0]
default: // everything else must stay in an array (int, string, etc)
resultParams = params
}
}
} else {
resultParams = params
}
default: // if more than one parameter was provided it should be treated as an array
resultParams = params
}
}
return resultParams
}
type (
// VUSetup - setup meter attributes
VUSetup struct {
color string
width float64
length float64 // percentile
well bool
}
// VULayout - visualization setup
VULayout struct {
meter string
mode string
base string
layout string // vertical/horizontal
setup VUSetup
xpivot [2]float64
w int
h int
w2m int
h2m int
ptWidth float64
wMeter float64
rMeter float64
rWell float64
vu draw.Image // think! this doubles memory foot print
baseImage draw.Image
}
// LMSPlayer exposes several key attributes for the player and current track
LMSPlayer struct {
MAC string
Playername string
IP string
Mode string
Bitty string // not Little Britain :)
Artist *InfoLabel
Album *InfoLabel
Title *InfoLabel
Albumartist *InfoLabel
Composer *InfoLabel
Conductor *InfoLabel
Compilation string
Genre string
coverid string
time float64
TimeStr string
duration float64
DurStr string
remaining float64
RemStr string
Percent float64
remote bool
arturl string
coverart draw.Image
repeat int
shuffle int
Bitrate string
Samplesize float64
Samplerate float64
Volume int
Year string
lastVol int
lastRepeat int
lastShuffle int
}
// SSES server details
SSES struct {
active bool
host string
port int
endpoint string
url string
events chan *SSEvent
}
// LMSServer limited to a single player for current usage
LMSServer struct {
id int
host string
port int
web string
url string
sses SSES
arturl string
coverart draw.Image
defaultart draw.Image
volume draw.Image
vulayout VULayout
volviz bool
volinit bool
voltrig *time.Timer
playmodifiers draw.Image
Player *LMSPlayer
mux sync.Mutex
face font.Face
fontHeight float64
color color.Color
cacache *CACache
update chan bool
}
)
// NewLMSPlayer initiate an LMS player
func NewLMSPlayer(player string) *LMSPlayer {
d1 := 120 * time.Millisecond
d2 := 180 * time.Millisecond
return &LMSPlayer{
MAC: player,
Playername: ``,
IP: ``,
Mode: ``,
Bitty: `CD`,
Samplesize: 44.1,
Samplerate: 16,
Artist: NewInfoLabel(34, 1, d2, true, false),
Album: NewInfoLabel(34, 2, d1, true, false),
Title: NewInfoLabel(34, 1, d2, true, false),
Albumartist: NewInfoLabel(34, 2, d1, true, false),
Composer: NewInfoLabel(34, 1, d2, true, false),
Conductor: NewInfoLabel(34, 1, d1, true, false),
Genre: ``,
coverid: ``,
time: 0.00,
TimeStr: `00:00`,
duration: 0.00,
DurStr: `00:00`,
remaining: 0.00,
RemStr: `00:00`,
Percent: 0,
remote: false,
repeat: 0,
shuffle: 0,
Volume: 0,
Year: `0`,
lastVol: -1,
lastRepeat: -1,
lastShuffle: -1,
}
}
func (p *LMSPlayer) setPercent() {
if 0 != p.duration {
p.Percent = 100 * p.time / p.duration
p.remaining = p.duration - p.time
p.RemStr = `-` + p.displayTime(p.remaining)
} else {
p.Percent = 0.00
p.remaining = 0.00
p.RemStr = `00:00`
}
}
func (p *LMSPlayer) displayTime(t float64) string {
hr := ``
hours := math.Floor(t / 60 / 60)
if hours > 0 {
hr = fmt.Sprintf("%02.0f:", hours)
t -= hours * 3600
}
return fmt.Sprintf("%s%02.0f:%02.0f", hr, math.Floor(t/60), math.Floor(math.Mod(t, 60)))
}
func (p *LMSPlayer) setDuration(d float64) {
p.duration = d
p.DurStr = p.displayTime(d)
p.setPercent()
}
func (p *LMSPlayer) setTime(t float64) {
p.time = t
p.TimeStr = p.displayTime(t)
p.setPercent()
}
// Stop marquee updates
func (p *LMSPlayer) Stop() {
p.Artist.Stop()
p.Album.Stop()
p.Title.Stop()
p.Albumartist.Stop()
p.Composer.Stop()
p.Conductor.Stop()
// stop sses consumption
}
// Start marquee updates
func (p *LMSPlayer) Start() {
p.Artist.Start()
p.Album.Start()
p.Title.Start()
p.Albumartist.Start()
p.Composer.Start()
p.Conductor.Start()
}
// LMSConfig setup
type LMSConfig struct {
Host string
Port int
Player string
BaseFolder string
Meter string
MeterMode string
MeterLayout string
MeterBase string
NeedleColor string
NeedleWidth float64
NeedleLength float64 // percentile
NeedleWell bool
SSESActive bool
SSESHost string
SSESPort int
SSESEndpoint string
}
// NewLMSServer initiates an LMS server instance
func NewLMSServer(lc LMSConfig) *LMSServer {
ls := new(LMSServer)
if `` == lc.Host {
lc.Host = `localhost`
}
ls.id = 0
ls.host = lc.Host
ls.port = lc.Port
ls.web = fmt.Sprintf("http://%s:%d", lc.Host, lc.Port)
ls.arturl = fmt.Sprintf("%s/music/current/cover.jpg?player=%s", ls.web, lc.Player)
ls.coverart = imaging.New(500, 500, color.NRGBA{0, 0, 0, 0})
i := getIcon(`vinyl2`)
i.scale = 500 / float64(i.width)
ls.defaultart, _ = getImageIconWIP(i)
ls.url = fmt.Sprintf("%s/jsonrpc.js", ls.web)
ls.web += `/`
ls.Player = NewLMSPlayer(lc.Player)
ls.volume = image.NewRGBA(image.Rect(0, 0, 24, 16))
ls.playmodifiers = image.NewRGBA(image.Rect(0, 0, 28, 16))
ls.face = basicfont.Face7x13
ls.fontHeight = 13
ls.color = color.White
ls.cacache = InitImageCache(lc.BaseFolder, true)
ls.sses.active = lc.SSESActive
ls.sses.host = lc.SSESHost
ls.sses.port = lc.SSESPort
if lc.SSESEndpoint[0] != '/' {
lc.SSESEndpoint = `/` + lc.SSESEndpoint
}
ls.sses.endpoint = lc.SSESEndpoint
ls.sses.url = fmt.Sprintf("%s:%d%s", lc.SSESHost, lc.SSESPort, lc.SSESEndpoint)
ls.volviz = false
ls.voltrig = time.NewTimer(2 * time.Second)
ls.voltrig.Stop()
ls.volinit = false
ls.vulayout.vu = image.NewRGBA(image.Rect(0, 0, 1, 1)) // size as needed
if `` != lc.Meter {
ls.vulayout.meter = lc.Meter
ls.vulayout.layout = lc.MeterLayout
ls.vulayout.base = lc.MeterBase
ls.vulayout.mode = lc.MeterMode
ls.vulayout.setup.color = lc.NeedleColor
ls.vulayout.setup.width = lc.NeedleWidth
ls.vulayout.setup.length = lc.NeedleLength
ls.vulayout.setup.well = lc.NeedleWell
ls.initVUBase()
}
if ls.sses.active {
ls.sseclient()
}
return ls
}
func (ls *LMSServer) sseclient() {
ls.sses.events = make(chan *SSEvent)
go ssenotifyacquire(ls.sses.url, ls.sses.events)
go ls.consumeEvents()
}
func (ls *LMSServer) consumeEvents() {
if ls.sses.active {
wsa := lms.vulayout.baseImage.Bounds().Max.X
hsa := lms.vulayout.baseImage.Bounds().Max.Y
ssecanvas := image.NewRGBA(image.Rect(0, 0, wsa, hsa))
govu := false
wbin := wsa / (6 + (9 * 2))
accum := [2]int32{-1, -1}
dBfs := [2]int32{1000, 1000}
dB := [2]int32{1000, 1000}
linear := [2]int32{-1, -1}
scaled := [2]int32{-1, -1}
mindb := [2]int32{1000, 1000}
maxdb := [2]int32{-1000, -1000}
// fun with caps
caps := [2][9]float64{{0, 0, 0, 0, 0, 0, 0, 0, 0}, {0, 0, 0, 0, 0, 0, 0, 0, 0}}
// SA scaling
multiSA := float64(hsa-1) / 31.00 // max input is 31 -2 to leave head-room
for event := range ls.sses.events {
// if we get an exception - review what happens here
if !event.Active {
ls.sses.active = false
close(ls.sses.events)
fmt.Println(`Inactive SSES, exit event stream`)
return // and stop consuming...
}
var m Meter
b, err := ioutil.ReadAll(event.Data)
if err != nil {
panic(err)
}
good := true
if err := json.Unmarshal(b, &m); err != nil {
fmt.Println(err) // observed incomplete JSON - timing thread safe pointers ???
good = false
}
dirty := false
dataset := m.Type
if good {
// much WIP experimental below
for _, c := range m.Channels {
i := 0
if `R` == c.Name {
i = 1
}
if c.DB < mindb[i] {
mindb[i] = c.DB
//fmt.Println(c.Name, `min`, mindb[i], `max`, maxdb[i])
}
if c.DB > maxdb[i] {
maxdb[i] = c.DB
//fmt.Println(c.Name, `min`, mindb[i], `max`, maxdb[i])
}
/*
if accum[i] != c.Accumulated {
dirty = true
accum[i] = c.Accumulated
}
if linear[i] != c.Linear {
dirty = true
linear[i] = c.Linear
}
*/
if dB[i] != c.DB {
dirty = true
dB[i] = c.DB
}
if dBfs[i] != c.DBfs {
dirty = true
dBfs[i] = c.DBfs
}
if scaled[i] != c.Scaled {
dirty = true
scaled[i] = c.Scaled
}
}
}
if dirty {
if `VU` == dataset {
govu = true
if `vuPeak` != ls.vulayout.mode {
ls.vuAnalog(accum, scaled, dB, dBfs, linear)
} else {
ls.vuPeak(dBfs)
//ls.vuPeak(dB)
}
} else {
if govu {
draw.Draw(ssecanvas, ssecanvas.Bounds(), ls.vulayout.vu, image.ZP, draw.Src)
} else {
draw.Draw(ssecanvas, ssecanvas.Bounds(), ls.vulayout.baseImage, image.ZP, draw.Src)
}
oot := 0
capll := color.RGBA{255, 0, 0, 192}
for channel, c := range m.Channels {
cll := getRandomColor(128)
ofs := int(wbin/2) + 2 + (channel * (wsa / 2))
for bin := 0; bin < 9; bin++ {
test := 0.00
if bin < int(c.NumFFT) {
//cll = getRandomColor(64 + uint8((255-65)*(float64(c.FFT[bin])/31)))
cll.A = 64 + uint8((255-65)*(float64(c.FFT[bin])/31))
oot = int(multiSA * float64(c.FFT[bin]))
test = float64(c.FFT[bin])
} else {
oot = int(multiSA / 4.00)
}
draw.Draw(ssecanvas, image.Rect(ofs, hsa, ofs+wbin-1, hsa-oot), &image.Uniform{cll}, image.ZP, draw.Src)
if test >= caps[channel][bin] {
caps[channel][bin] = test
} else if caps[channel][bin] > 0 {
caps[channel][bin]--
if caps[channel][bin] < 0 {
caps[channel][bin] = 0
}
}
if caps[channel][bin] > 0 {
coot := int(multiSA * caps[channel][bin])
draw.Draw(ssecanvas, image.Rect(ofs, hsa-coot-1, ofs+wbin-1, hsa-coot), &image.Uniform{capll}, image.ZP, draw.Src)
}
ofs += (1 + wbin)
}
}
ls.mux.Lock()
draw.Draw(ls.vulayout.vu, ls.vulayout.vu.Bounds(), ssecanvas, image.ZP, draw.Src)
ls.mux.Unlock()
}
}
}
}
}
func getRandomColor(alpha uint8) color.RGBA {
rand.Seed(time.Now().UnixNano())
r := uint8(rand.Intn(255))
g := uint8(rand.Intn(255))
b := uint8(rand.Intn(255))
return color.RGBA{r, g, b, alpha}
}
// Close and clear the associated cache
func (ls *LMSServer) Close() {
ls.cacache.Close()
}
// PlayerMAC sets player MAC - useful if current player changes
func (ls *LMSServer) PlayerMAC(player string) {
ls.Player.MAC = player
}
// SSESAddress returns sses server address if active
func (ls *LMSServer) SSESAddress() string {
r := ``
if ls.sses.active {
r = ls.sses.url
}
return r
}
func (ls *LMSServer) requestAndKey(params interface{}, key string) (interface{}, error) {
ret, err := ls.request(ls.Player.MAC, params)
if err != nil {
return nil, err
}
if v, ok := ret.(map[string]interface{})[key]; ok {
return v, nil
}
return nil, err // need a real error here
}
func (ls *LMSServer) request(player string, params interface{}) (interface{}, error) {
if `` == player {
player = `-`
}
data := &RPCRequest{
Method: "slim.request",
Params: Params(player, params),
ID: ls.id,
}
body, err := json.Marshal(data)
if err != nil {
return nil, err
}
request, err := http.NewRequest("POST", ls.url, bytes.NewBuffer(body))
if err != nil {
return nil, err
}
request.Header.Set("Content-Type", "application/json")
request.Header.Set("Accept", "application/json")
client := http.Client{Timeout: 10 * time.Second}
response, err := client.Do(request)
if err != nil {
return nil, err
}
defer response.Body.Close()
body, err = ioutil.ReadAll(response.Body)
if err != nil {
return nil, err
}
var resp RPCResponse
err = json.Unmarshal(body, &resp)
if err != nil {
return nil, err
}
return resp.Result, nil
}
// Start initiates the schedule update
func (ls *LMSServer) Start() {
ls.update = sched(ls.updatePlayer, 400*time.Millisecond)
ls.Player.Start()
}
// Stop the schedule updates and close event channel if active
func (ls *LMSServer) Stop() {
ls.update <- true
if ls.sses.active {
close(ls.sses.events)
}
ls.Player.Stop()
}
func (ls *LMSServer) updatePlayer() {
defer func() {
if err := recover(); err != nil {
ls.mux.Unlock() // ensure unlock
fmt.Println(`exception recovered`, err)
}
}()
ls.mux.Lock()
vs, err := ls.request(ls.Player.MAC, []string{"status", "-", "1", "tags:cgABbehldiqtyrSuoKLNJITC"})
if nil != vs && err == nil {
if v, ok := vs.(map[string]interface{}); ok {
b, err := json.Marshal(v)
if nil != err {
panic(err)
}
s := LMSDetail{}
err = json.Unmarshal(b, &s)
if nil != err {
panic(err)
}
ls.Player.Mode = s.Mode
if `play` == s.Mode {
ckcd := ls.Player.coverid
ls.Player.Volume = s.MixerVolume
if ls.Player.Volume != ls.Player.lastVol {
ls.setVolume()
}
if t, ok := s.Time.(float64); ok {
ls.Player.setTime(t)
}
if d, ok := s.Duration.(float64); ok {
ls.Player.setDuration(d)
}
ls.Player.repeat = s.PlaylistRepeat
ls.Player.shuffle = s.PlaylistShuffle
if ls.Player.lastRepeat != ls.Player.repeat ||
ls.Player.lastShuffle != ls.Player.shuffle {
ls.setPlayModifiers()
}
ls.Player.lastVol = ls.Player.Volume
ls.Player.lastRepeat = ls.Player.repeat
ls.Player.lastShuffle = ls.Player.shuffle
// remote
ls.Player.remote = (1 == s.Remote)
if ls.Player.remote {
ls.Player.Artist.SetText(s.RemoteMeta.Artist)
ls.Player.Albumartist.SetText(s.RemoteMeta.Artist)
title := s.RemoteMeta.RemoteTitle
if `` == title {
title = s.RemoteMeta.Title
}
ls.Player.Title.SetText(title)
ls.Player.Composer.SetText(``)
ls.Player.Conductor.SetText(``)
ls.Player.Album.SetText(title)
ls.Player.Year = s.RemoteMeta.Year
ls.Player.Genre = s.RemoteMeta.Genre
ls.Player.coverid = s.RemoteMeta.Coverid
ls.Player.Bitrate = s.RemoteMeta.Bitrate
ls.Player.Bitty = fmt.Sprintf("• %v •", ls.Player.Bitrate)
} else {
artist := s.PlaylistLoop[0].Artist
if artist == `` {
artist = s.PlaylistLoop[0].Trackartist
}
ls.Player.Bitrate = s.PlaylistLoop[0].Bitrate
f := s.PlaylistLoop[0].Samplesize
ls.Player.Samplesize, err = strconv.ParseFloat(f, 64)
if nil != err {
ls.Player.Samplesize = 16
}
f = s.PlaylistLoop[0].Samplerate
ls.Player.Samplerate, err = strconv.ParseFloat(f, 64)
if nil != err {
ls.Player.Samplerate = 44.1
} else {
ls.Player.Samplerate /= 1000
}
ls.Player.Artist.SetText(artist)
ls.Player.Album.SetText(s.PlaylistLoop[0].Album)
ls.Player.Composer.SetText(s.PlaylistLoop[0].Composer)
ls.Player.Conductor.SetText(s.PlaylistLoop[0].Conductor)
ls.Player.Title.SetText(s.PlaylistLoop[0].Title)
ls.Player.Compilation = s.PlaylistLoop[0].Compilation
if `1` == ls.Player.Compilation {
ls.Player.Albumartist.SetText(`Various Artists`)
} else {
ls.Player.Albumartist.SetText(s.PlaylistLoop[0].Albumartist)
}
if `` == ls.Player.Albumartist.text {
ls.Player.Albumartist.SetText(ls.Player.Artist.text)
}
ls.Player.Year = s.PlaylistLoop[0].Year
ls.Player.Genre = s.PlaylistLoop[0].Genre
ls.Player.coverid = s.PlaylistLoop[0].Coverid
switch ls.Player.Samplesize {
case 1:
ls.Player.Bitty = fmt.Sprintf("• DSD%v •", math.Floor(ls.Player.Samplerate/44.1))
default:
ls.Player.Bitty = fmt.Sprintf("%vb • %vkHz", ls.Player.Samplesize, ls.Player.Samplerate)
}
}
if "" == ls.Player.Year || "0" == ls.Player.Year {
ls.Player.Year = "????"
}
if ckcd != ls.Player.coverid {
err = ls.cacheImage()
checkFatal(err) // will be caught...
}
} else {
ls.volinit = false
}
} else {
ls.Player.Mode = `unknown`
}
} else {
ls.Player.Mode = `unknown`
}
ls.mux.Unlock()
}
// Coverart returns the cover image cache
func (ls *LMSServer) Coverart() draw.Image {
return ls.coverart
}
// VUActive meter is active
func (ls *LMSServer) VUActive() bool {
return (ls.sses.active && `` != ls.vulayout.meter)
}
// VU returns the vu meter
func (ls *LMSServer) VU() draw.Image {
return ls.vulayout.vu
}
// Volume returns the volume glyph
func (ls *LMSServer) Volume() draw.Image {
return ls.volume
}
// PlayModifiers returns the playlist modifier glyph(s)
func (ls *LMSServer) PlayModifiers() draw.Image {
return ls.playmodifiers
}
// SetFace set font face and color
func (ls *LMSServer) SetFace(f font.Face, x string) {
if ls.face != f {
ls.face = f
fmx := ls.face.Metrics()
ls.fontHeight = float64((fmx.Height >> 6) + 2)
}
ls.color = parseHexColor(x)
ls.Player.Albumartist.SetFace(f, x)
ls.Player.Album.SetFace(f, x)
ls.Player.Title.SetFace(f, x)
ls.Player.Artist.SetFace(f, x)
ls.Player.Composer.SetFace(f, x)
ls.Player.Conductor.SetFace(f, x)
}
// SetMaxLen set scroll limits
func (ls *LMSServer) SetMaxLen(m int) {
ls.Player.Albumartist.SetMaxlen(m)
ls.Player.Album.SetMaxlen(m)
ls.Player.Title.SetMaxlen(m)
ls.Player.Artist.SetMaxlen(m)
ls.Player.Composer.SetMaxlen(m)
ls.Player.Conductor.SetMaxlen(m)
}
func (ls *LMSServer) setVolume() {
var ticon iconCache
if 0 == ls.Player.Volume {
ticon, _ = cacheImage(`volume-mute`, ticon, 0.0, ``)
} else {
for i := 0; i < 5; i++ {
if ls.Player.Volume <= ((i + 1) * 20) {
ticon, _ = cacheImage(fmt.Sprintf("volume-%d", i), ticon, 0.0, ``)
break
}
}
}
wc := int(3.5 * ls.fontHeight)
hc := int(1.5*ls.fontHeight) + 2
canvas := image.NewRGBA(image.Rect(0, 0, wc, hc))
size := hc - 5
dst := imaging.Resize(ticon.image, size, size, imaging.Lanczos)
cb := canvas.Bounds()
cb.Min.X = int(float64(cb.Max.X) * .333)
draw.Draw(canvas, cb, dst, image.ZP, draw.Src)
if 0 != ls.Player.Volume {
t := fmt.Sprintf("%d", ls.Player.Volume)
d := &font.Drawer{
Dst: canvas,
Src: image.NewUniform(ls.color),
Face: ls.face,
}
adv := d.MeasureString(t)
fw := float64(cb.Min.X-1) - float64(adv>>6) // right justify
d.Dot = fixed.Point26_6{fixed.Int26_6(fw * 64), fixed.Int26_6(9 * 64)}
d.DrawString(t)
}
draw.Draw(ls.volume, ls.volume.Bounds(), canvas, image.ZP, draw.Src)
if ls.volinit {
ls.voltrig.Reset(2 * time.Second)
ls.volviz = true
go func() {
select {
case <-ls.voltrig.C:
ls.volviz = false
}
}()
}
ls.volinit = true
}
func (ls *LMSServer) setPlayModifiers() {
wc := int(3 * ls.fontHeight)
hc := int(1.5*ls.fontHeight) + 2
canvas := image.NewRGBA(image.Rect(0, 0, wc, hc))
size := hc - 4
var ticon iconCache
cb := canvas.Bounds()
cb.Min.X = 2
if 0 != ls.Player.repeat {
ticon, _ = cacheImage(fmt.Sprintf("repeat-%d", ls.Player.repeat), ticon, 0.0, ``)
dst := imaging.Resize(ticon.image, size, size, imaging.Lanczos)
draw.Draw(canvas, cb, dst, image.ZP, draw.Src)
}
cb.Min.X += size
if 0 != ls.Player.shuffle {
ticon, _ = cacheImage(fmt.Sprintf("shuffle-%d", ls.Player.shuffle), ticon, 0.0, ``)
dst := imaging.Resize(ticon.image, size, size, imaging.Lanczos)
draw.Draw(canvas, cb, dst, image.ZP, draw.Src)
}
draw.Draw(ls.playmodifiers, ls.playmodifiers.Bounds(), canvas, image.ZP, draw.Src)
}
func (ls *LMSServer) getImage(r io.Reader) (image.Image, error) {
// need to make this buffered and cancel-able!
im, err := imaging.Decode(r, imaging.AutoOrientation(true))
if err != nil {
ls.drawBase(true)
//im = ls.defaultart // ????????
return im, err
}
im = imaging.Resize(im, 500, 500, imaging.Lanczos)
return im, nil
}
func (ls *LMSServer) drawBase(defart bool) {
if defart {
draw.Draw(ls.coverart, ls.coverart.Bounds(), ls.defaultart, image.ZP, draw.Src)
} else {
draw.Draw(ls.coverart, ls.coverart.Bounds(), &image.Uniform{color.Black}, image.ZP, draw.Src)
}
}
func (ls *LMSServer) cacheImageBackground() {
err := ls.cacheImage()
checkFatal(err)
}
func (ls *LMSServer) cacheImage() error {
// check if we have the cover cached
im, ok := ls.cacache.GetImage(ls.Player.coverid)
if ok {
ls.drawBase(false)