qml audio element, get audio length before play
Hi everybody,
I got some problem to retrieve audio length from qml Audio component, I use the example code below:
Code:
import QtQuick 1.1
import com.nokia.meego 1.1
import QtMultimediaKit 1.1
Item {
id: player
property string color: "transparent"
property string filePath: ""
property bool playing: false
//property int duration: audio.source != "" ? audio.duration : 0
property int duration: audio.duration
//property string durationTime: audio.source != "" ? getTimeFromMSec(audio.duration) : ""
property string durationTime: getTimeFromMSec(duration)
property alias position: audio.position
property alias volume: audio.volume
property string error: audio.errorString
function play() {
playing = true
audio.play()
}
function pause() {
audio.pause()
playing = false
}
function stop() {
audio.stop()
playing = false
}
function loadAudio(fileName) {
audio.stop()
audio.source = fileName
}
function getTimeFromMSec(msec) {
if (msec <= 0 || msec == undefined) {
return ""
} else {
var sec = "" + Math.floor(msec / 1000) % 60
if (sec.length == 1)
sec = "0" + sec
var hour = Math.floor(msec / 3600000)
if (hour < 1) {
return Math.floor(msec / 60000) + ":" + sec
} else {
var min = "" + Math.floor(msec / 60000) % 60
if (min.length == 1)
min = "0" + min
return hour + ":" + min + ":" + sec
}
}
}
onFilePathChanged: loadAudio(filePath)
Audio {
id: audio
volume: 0
Component.onCompleted: timer.running = true
}
Timer {
id: timer
interval: 100; running: false; repeat: true; triggeredOnStart: true
onTriggered: {
print("****")
if(audio.playing) {
if(player.durationTime != ''){
repeat = false
running = false
player.stop();
player.volume = 0.5
}
}
else player.play()
}
}
Rectangle {
width: parent.width
height: parent.height
color: player.color
ToolIcon {
id: playIcon
iconId: "toolbar-mediacontrol-play";
anchors.verticalCenter: parent.verticalCenter
anchors.left: parent.left
state: "pause"
states: State {
name: "play"
PropertyChanges { target: playIcon; iconId: "toolbar-mediacontrol-pause" }
}
onClicked: {
if(state == "play") {
state = "pause"
player.pause()
}
else {
state = "play"
player.play()
}
}
}
ToolIcon {
id: stopIcon
iconId: "toolbar-mediacontrol-stop";
anchors.verticalCenter: parent.verticalCenter
anchors.left: playIcon.right
onClicked: {
player.stop()
playIcon.state = "pause"
}
}
ProgressBar {
id: progressBar
anchors.top: parent.top
width: parent.width
maximumValue: player.duration
minimumValue: 0
Binding {
target: progressBar
property: "value"
value: player.position
when: player.playing
}
}
Text {
id: timeLabel
anchors.left: stopIcon.right
anchors.verticalCenter: parent.verticalCenter
text: player.durationTime
}
}
}
I can not get audio duration event after audio is loaded, only after i call the play() function and a little bit later, can i get the duration, before that, the audio.duration property is 0 or -1.
is this a bug or I missed something?
above I used a very ugly way to get the duration, set a timer, and play with no sound until I get the duration string. |
