HTML5 video play
1.How will the HTML call video player in the webpage? (from dom parsing to mediaplayer)
HTMLMediaElement::updatePlayState()->
HTMLMediaElement::m_player->play()->
MediaPlayer.cpp(in webkit)->play()//(this file use factory create player)->
MediaPlayerPrivateInterface->play()->
MediaPlayerPrivateAndroid.play()->android/webkit/HTML5VideoViewProxy.play()->
VideoPlayer.play(HTML5VideoViewProxy.java)->
HTML5VideoView.start()/HTML5VideoFullScreen/HTML5VideoInline.start()->
MediaPlayer.start(MediaPlayer.java)->(android_media_MediaPlayer.cpp)._start()
2. player JNI relationship in Webkit
MediaPlayerPrivateAndroid.cpp 's jni class
"android/webkit/HTML5VideoViewProxy" and "android/webkit/HTML5Audio"
There three classes in "MediaPlayerPrivateAndroid.cpp"
"MediaPlayerPrivate" as basic class;
"MediaPlayerVideoPrivate" as subclass for "android/webkit/HTML5VideoViewProxy"
"MediaPlayerVideoPrivate" as subclass for "android/webkit/HTML5Audio"
3. HTML5VideoView
in "VideoPlayer" (HTML5VideoViewProxy.java) we use "HTML5VideoView" for play.(how to use? i am finding out)
how many kinds of HTML5VideoView are used?
a."HTML5VideoView" as basic class
b."HTML5VideoFullScreen" is used for full screen playing
c."HTML5VideoInline" is used when it's not full screen.
4. Timer in HTML5VideoView
a.HTML5VideoView.start();
mTimer.schedule(new TimeupdateTask(mProxy), TIMEUPDATE_PERIOD, TIMEUPDATE_PERIOD);
b. in TimeupdateTask's run()
public void run() {
mProxy.onTimeupdate();
}
c. in HTML5VideoViewProxy.java
public void onTimeupdate() {
sendMessage(obtainMessage(TIMEUPDATE));
}
d. in HTML5VideoViewProxy.java
nativeOnTimeupdate(msg.arg1, mNativePointer);
e. finally MediaPlayerPrivateAndroid.cpp
static void OnTimeupdate(JNIEnv* env, jobject obj, int position, int pointer)
{
if (pointer) {
WebCore::MediaPlayerPrivate* player = reinterpret_cast<WebCore::MediaPlayerPrivate*>(pointer);
player->onTimeupdate(position);
}
}