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avtransport.go
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avtransport.go
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// MIT+NoAI License
//
// Copyright (c) 2023 ugjka <ugjka@proton.me>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights///
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//
// This code may not be used to train artificial intelligence computer models
// or retrieved by artificial intelligence software or hardware.
package main
import (
"fmt"
"log"
"strings"
"time"
"github.com/huin/goupnp"
"github.com/huin/goupnp/dcps/av1"
)
type avsetup struct {
device *goupnp.MaybeRootDevice
stream stream
logoURI string
streamURI string
}
type avtransport interface {
SetAVTransportURI(InstanceID uint32, CurrentURI string, CurrentURIMetaData string) (err error)
Play(InstanceID uint32, Speed string) (err error)
Stop(InstanceID uint32) (err error)
}
func detectAVtransport(dev *goupnp.MaybeRootDevice) string {
transport := dev.Root.Device.FindService(av1.URN_AVTransport_1)
if len(transport) > 0 {
return av1.URN_AVTransport_1
}
transport = dev.Root.Device.FindService(av1.URN_AVTransport_2)
if len(transport) > 0 {
return av1.URN_AVTransport_2
}
return ""
}
func AVSetAndPlay(av avsetup) error {
urn := detectAVtransport(av.device)
var client avtransport
switch {
case urn == av1.URN_AVTransport_1:
clients, err := av1.NewAVTransport1ClientsByURL(av.device.Location)
if err != nil {
return err
}
client = avtransport(clients[0])
case urn == av1.URN_AVTransport_2:
clients, err := av1.NewAVTransport2ClientsByURL(av.device.Location)
if err != nil {
return err
}
client = avtransport(clients[0])
default:
return fmt.Errorf("no avtransport found")
}
var err error
try := func(metadata string) error {
err = client.SetAVTransportURI(0, av.streamURI, metadata)
if err != nil {
return fmt.Errorf("set uri: %v", err)
}
time.Sleep(time.Second)
err = client.Play(0, "1")
if err != nil {
return fmt.Errorf("play: %v", err)
}
return nil
}
metadata := fmt.Sprintf(
didlTemplate,
av.logoURI,
av.stream.mime,
av.stream.contentfeat,
av.stream.bitdepth,
av.stream.samplerate,
av.stream.channels,
av.streamURI,
)
metadata = strings.ReplaceAll(metadata, "\n", " ")
metadata = strings.ReplaceAll(metadata, "> <", "><")
err = try(metadata)
if err == nil {
return nil
}
log.Println(err)
log.Println("trying without metadata")
return try("")
}
func AVStop(device *goupnp.MaybeRootDevice) {
urn := detectAVtransport(device)
var client avtransport
switch {
case urn == av1.URN_AVTransport_1:
clients, err := av1.NewAVTransport1ClientsByURL(device.Location)
if err != nil {
return
}
client = avtransport(clients[0])
case urn == av1.URN_AVTransport_2:
clients, err := av1.NewAVTransport2ClientsByURL(device.Location)
if err != nil {
return
}
client = avtransport(clients[0])
default:
return
}
client.Stop(0)
}
const didlTemplate = `<DIDL-Lite
xmlns="urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/"
xmlns:upnp="urn:schemas-upnp-org:metadata-1-0/upnp/"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:dlna="urn:schemas-dlna-org:metadata-1-0/"
xmlns:sec="http://www.sec.co.kr/"
xmlns:pv="http://www.pv.com/pvns/">
<item id="0" parentID="-1" restricted="1">
<upnp:class>object.item.audioItem.musicTrack</upnp:class>
<dc:title>Audio Cast</dc:title>
<dc:creator>Blast</dc:creator>
<upnp:artist>Blast</upnp:artist>
<upnp:albumArtURI>%s</upnp:albumArtURI>
<res protocolInfo="http-get:*:%s:%s"
bitsPerSample="%d"
sampleFrequency="%d"
nrAudioChannels="%d">%s</res>
</item>
</DIDL-Lite>`