1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
//
// rhlibrary
//
// The Radio Helsinki Rivendell Library
//
//
// Copyright (C) 2016 Christian Pointner <equinox@helsinki.at>
//
// This file is part of rhlibrary.
//
// rhlibrary is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// any later version.
//
// rhlibrary is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with rhlibrary. If not, see <http://www.gnu.org/licenses/>.
//
package player
import (
"fmt"
"github.com/spreadspace/go-gstreamer"
"path"
)
func init() {
gst.Init(nil)
}
type Player struct {
pipe *gst.Element
bus *gst.Bus
basepath string
}
func (p *Player) onMessage(bus *gst.Bus, msg *gst.Message) {
switch msg.GetType() {
case gst.MESSAGE_EOS:
fmt.Printf("GStreamer Pipeline: EOS reached!\n")
p.pipe.SetState(gst.STATE_NULL)
case gst.MESSAGE_WARNING:
warn, _ := msg.ParseWarning()
fmt.Printf("GStreamer Pipeline Warning: %s\n", warn)
case gst.MESSAGE_ERROR:
p.pipe.SetState(gst.STATE_NULL)
err, _ := msg.ParseError()
fmt.Printf("GStreamer Pipeline Error: %s\n", err)
case gst.MESSAGE_ASYNC_DONE:
len, ok := p.pipe.QueryDuration(gst.FORMAT_TIME)
if ok {
fmt.Printf("GStreamer Pipeline: loaded file has length: %d.%d s\n", len/1000000000, len%1000000000)
} else {
fmt.Printf("GStreamer Pipeline Error: unable to query duration of file\n")
}
case gst.MESSAGE_STATE_CHANGED:
default:
fmt.Printf("GStreamer Message: unknown type '%s'\n", msg.GetTypeName())
}
}
func (p *Player) Play(cart, cut uint) (err error) {
filename := path.Join(p.basepath, fmt.Sprintf("%06d_%03d.wav", cart, cut))
p.pipe.SetProperty("uri", "file://"+filename)
p.pipe.SetState(gst.STATE_PLAYING)
return
}
func NewPlayer(basepath string) (p *Player, err error) {
p = &Player{}
p.basepath = path.Clean(basepath)
if p.pipe, err = gst.ElementFactoryMake("playbin", "autoplay"); err != nil {
return
}
if p.bus, err = p.pipe.GetBus(); err != nil {
return
}
p.bus.AddSignalWatch()
p.bus.Connect("message", func(bus *gst.Bus, msg *gst.Message) { p.onMessage(bus, msg) })
return
}
|
