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videojs-contrib-hls
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651d468e
authored
2015-03-20 14:52:16 -0400
by
David LaPalomento
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Merge pull request #229 from videojs/live-start-time
Live start time tweaks
2 parents
7744312d
8028f6b0
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3 changed files
with
65 additions
and
8 deletions
package.json
src/videojs-hls.js
test/videojs-hls_test.js
package.json
View file @
651d468
...
...
@@ -39,7 +39,7 @@
"karma-sauce-launcher"
:
"~0.1.8"
,
"qunitjs"
:
"^1.15.0"
,
"sinon"
:
"1.10.2"
,
"video.js"
:
"^4.
9
.0"
"video.js"
:
"^4.
12
.0"
},
"dependencies"
:
{
"pkcs7"
:
"^0.2.2"
,
...
...
src/videojs-hls.js
View file @
651d468
...
...
@@ -164,6 +164,16 @@ videojs.Hls.prototype.src = function(src) {
});
}
// Start live playlists 30 seconds before the current time
// This is done using the old playlist because of a race condition
// where the playlist selected below may not be loaded quickly
// enough to have its segments available for review. When we receive
// a loadedplaylist event, we will call translateMediaIndex and
// maintain our position at the live point.
if
(
this
.
duration
()
===
Infinity
&&
this
.
mediaIndex
===
0
)
{
this
.
mediaIndex
=
videojs
.
Hls
.
getMediaIndexForLive_
(
oldMediaPlaylist
);
}
selectedPlaylist
=
this
.
selectPlaylist
();
oldBitrate
=
oldMediaPlaylist
.
attributes
&&
oldMediaPlaylist
.
attributes
.
BANDWIDTH
||
0
;
...
...
@@ -179,11 +189,6 @@ videojs.Hls.prototype.src = function(src) {
segmentDlTime
=
Infinity
;
}
// start live playlists 30 seconds before the current time
if
(
this
.
duration
()
===
Infinity
&&
this
.
mediaIndex
===
0
&&
selectedPlaylist
.
segments
)
{
this
.
mediaIndex
=
videojs
.
Hls
.
setMediaIndexForLive
(
selectedPlaylist
);
}
// this threshold is to account for having a high latency on the manifest
// request which is a somewhat small file.
threshold
=
10
;
...
...
@@ -239,7 +244,14 @@ videojs.Hls.prototype.src = function(src) {
});
};
videojs
.
Hls
.
setMediaIndexForLive
=
function
(
selectedPlaylist
)
{
/* Returns the media index for the live point in the current playlist, and updates
the current time to go along with it.
*/
videojs
.
Hls
.
getMediaIndexForLive_
=
function
(
selectedPlaylist
)
{
if
(
!
selectedPlaylist
.
segments
)
{
return
0
;
}
var
tailIterator
=
selectedPlaylist
.
segments
.
length
,
tailDuration
=
0
,
targetTail
=
(
selectedPlaylist
.
targetDuration
||
10
)
*
3
;
...
...
@@ -279,6 +291,11 @@ videojs.Hls.prototype.play = function() {
this
.
mediaIndex
=
0
;
}
if
(
this
.
duration
()
===
Infinity
&&
this
.
playlists
.
media
()
&&
!
this
.
player
().
hasClass
(
'vjs-has-started'
))
{
this
.
mediaIndex
=
videojs
.
Hls
.
getMediaIndexForLive_
(
this
.
playlists
.
media
());
this
.
setCurrentTime
(
this
.
getCurrentTimeByMediaIndex_
(
this
.
playlists
.
media
(),
this
.
mediaIndex
));
}
// delegate back to the Flash implementation
return
videojs
.
Flash
.
prototype
.
play
.
apply
(
this
,
arguments
);
};
...
...
@@ -936,7 +953,7 @@ videojs.Hls.translateMediaIndex = function(mediaIndex, original, update) {
if
(
translatedMediaIndex
>=
update
.
segments
.
length
||
translatedMediaIndex
<
0
)
{
// recalculate the live point if the streams are too far out of sync
return
videojs
.
Hls
.
setMediaIndexForLive
(
update
)
+
1
;
return
videojs
.
Hls
.
getMediaIndexForLive_
(
update
)
+
1
;
}
// sync on media sequence
...
...
@@ -974,6 +991,29 @@ videojs.Hls.getMediaIndexByTime = function(playlist, time) {
};
/**
* Determine the current time in seconds in one playlist by a media index. This
* function iterates through the segments of a playlist up to the specified index
* and then returns the time up to that point.
*
* @param playlist {object} The playlist of the segments being searched.
* @param mediaIndex {number} The index of the target segment in the playlist.
* @returns {number} The current time to that point, or 0 if none appropriate.
*/
videojs
.
Hls
.
prototype
.
getCurrentTimeByMediaIndex_
=
function
(
playlist
,
mediaIndex
)
{
var
index
,
time
=
0
;
if
(
!
playlist
.
segments
||
mediaIndex
===
0
)
{
return
0
;
}
for
(
index
=
0
;
index
<
mediaIndex
;
index
++
)
{
time
+=
playlist
.
segments
[
index
].
duration
;
}
return
time
;
};
/**
* A comparator function to sort two playlist object by bandwidth.
* @param left {object} a media playlist object
* @param right {object} a media playlist object
...
...
test/videojs-hls_test.js
View file @
651d468
...
...
@@ -1249,6 +1249,22 @@ test('live playlist starts 30s before live', function() {
strictEqual
(
player
.
hls
.
mediaIndex
,
6
,
'mediaIndex is updated after the reload'
);
});
test
(
'live playlist starts with correct currentTime value'
,
function
()
{
player
.
src
({
src
:
'http://example.com/manifest/liveStart30sBefore.m3u8'
,
type
:
'application/vnd.apple.mpegurl'
});
openMediaSource
(
player
);
standardXHRResponse
(
requests
[
0
]);
player
.
hls
.
playlists
.
trigger
(
'loadedmetadata'
);
player
.
hls
.
play
();
strictEqual
(
player
.
currentTime
(),
70
,
'currentTime is updated at playback'
);
});
test
(
'mediaIndex is zero before the first segment loads'
,
function
()
{
window
.
manifests
[
'first-seg-load'
]
=
'#EXTM3U\n'
+
...
...
@@ -1720,6 +1736,7 @@ test('calling play() at the end of a video resets the media index', function() {
player
.
hls
.
ended
=
function
()
{
return
true
;
};
player
.
play
();
strictEqual
(
player
.
hls
.
mediaIndex
,
0
,
'index is 1 after the first segment'
);
});
...
...
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