added first version of player

1 files changed, 90 insertions, 0 deletions

diff --git a/player/player.go b/player/player.go
new file mode 100644
index 0000000..5328475
--- /dev/null
+++ b/player/player.go
@@ -0,0 +1,90 @@
+//
+//  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
+}