Merge "Add the HTML5Audio class, to support the audio tag." into gingerbread
This commit is contained in:
Ben Murdoch
224
core/java/android/webkit/HTML5Audio.java
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224
core/java/android/webkit/HTML5Audio.java
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/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.webkit;
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import android.media.MediaPlayer;
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import android.media.MediaPlayer.OnBufferingUpdateListener;
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import android.media.MediaPlayer.OnCompletionListener;
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import android.media.MediaPlayer.OnErrorListener;
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import android.media.MediaPlayer.OnPreparedListener;
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import android.media.MediaPlayer.OnSeekCompleteListener;
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import android.os.Handler;
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import android.os.Message;
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import android.util.Log;
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import java.io.IOException;
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import java.util.Timer;
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import java.util.TimerTask;
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/**
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* <p>HTML5 support class for Audio.
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*/
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class HTML5Audio extends Handler
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implements MediaPlayer.OnBufferingUpdateListener,
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MediaPlayer.OnCompletionListener,
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MediaPlayer.OnErrorListener,
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MediaPlayer.OnPreparedListener,
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MediaPlayer.OnSeekCompleteListener {
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// Logging tag.
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private static final String LOGTAG = "HTML5Audio";
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private MediaPlayer mMediaPlayer;
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// The C++ MediaPlayerPrivateAndroid object.
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private int mNativePointer;
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private static int IDLE = 0;
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private static int INITIALIZED = 1;
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private static int PREPARED = 2;
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private static int STARTED = 4;
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private static int COMPLETE = 5;
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private static int PAUSED = 6;
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private static int STOPPED = -2;
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private static int ERROR = -1;
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private int mState = IDLE;
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private String mUrl;
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private boolean mAskToPlay = false;
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// Timer thread -> UI thread
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private static final int TIMEUPDATE = 100;
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// The spec says the timer should fire every 250 ms or less.
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private static final int TIMEUPDATE_PERIOD = 250; // ms
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// The timer for timeupate events.
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// See http://www.whatwg.org/specs/web-apps/current-work/#event-media-timeupdate
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private Timer mTimer;
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private final class TimeupdateTask extends TimerTask {
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public void run() {
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HTML5Audio.this.obtainMessage(TIMEUPDATE).sendToTarget();
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}
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}
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@Override
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public void handleMessage(Message msg) {
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switch (msg.what) {
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case TIMEUPDATE: {
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try {
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if (mState != ERROR && mMediaPlayer.isPlaying()) {
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int position = mMediaPlayer.getCurrentPosition();
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nativeOnTimeupdate(position, mNativePointer);
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}
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} catch (IllegalStateException e) {
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mState = ERROR;
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}
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}
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}
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}
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// event listeners for MediaPlayer
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// Those are called from the same thread we created the MediaPlayer
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// (i.e. the webviewcore thread here)
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// MediaPlayer.OnBufferingUpdateListener
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public void onBufferingUpdate(MediaPlayer mp, int percent) {
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nativeOnBuffering(percent, mNativePointer);
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}
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// MediaPlayer.OnCompletionListener;
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public void onCompletion(MediaPlayer mp) {
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resetMediaPlayer();
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mState = IDLE;
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nativeOnEnded(mNativePointer);
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}
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// MediaPlayer.OnErrorListener
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public boolean onError(MediaPlayer mp, int what, int extra) {
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mState = ERROR;
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resetMediaPlayer();
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mState = IDLE;
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return false;
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}
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// MediaPlayer.OnPreparedListener
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public void onPrepared(MediaPlayer mp) {
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mState = PREPARED;
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if (mTimer != null) {
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mTimer.schedule(new TimeupdateTask(),
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TIMEUPDATE_PERIOD, TIMEUPDATE_PERIOD);
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}
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nativeOnPrepared(mp.getDuration(), 0, 0, mNativePointer);
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if (mAskToPlay) {
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mAskToPlay = false;
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play();
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}
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}
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// MediaPlayer.OnSeekCompleteListener
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public void onSeekComplete(MediaPlayer mp) {
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nativeOnTimeupdate(mp.getCurrentPosition(), mNativePointer);
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}
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/**
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* @param nativePtr is the C++ pointer to the MediaPlayerPrivate object.
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*/
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public HTML5Audio(int nativePtr) {
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// Save the native ptr
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mNativePointer = nativePtr;
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resetMediaPlayer();
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}
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private void resetMediaPlayer() {
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if (mMediaPlayer == null) {
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mMediaPlayer = new MediaPlayer();
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} else {
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mMediaPlayer.reset();
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}
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mMediaPlayer.setOnBufferingUpdateListener(this);
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mMediaPlayer.setOnCompletionListener(this);
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mMediaPlayer.setOnErrorListener(this);
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mMediaPlayer.setOnPreparedListener(this);
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mMediaPlayer.setOnSeekCompleteListener(this);
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if (mTimer != null) {
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mTimer.cancel();
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}
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mTimer = new Timer();
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mState = IDLE;
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}
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private void setDataSource(String url) {
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mUrl = url;
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try {
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if (mState != IDLE) {
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resetMediaPlayer();
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}
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mMediaPlayer.setDataSource(url);
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mState = INITIALIZED;
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mMediaPlayer.prepareAsync();
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} catch (IOException e) {
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Log.e(LOGTAG, "couldn't load the resource: " + url + " exc: " + e);
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resetMediaPlayer();
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}
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}
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private void play() {
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if ((mState == ERROR || mState == IDLE) && mUrl != null) {
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resetMediaPlayer();
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setDataSource(mUrl);
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mAskToPlay = true;
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}
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if (mState >= PREPARED) {
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mMediaPlayer.start();
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mState = STARTED;
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}
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}
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private void pause() {
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if (mState == STARTED) {
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if (mTimer != null) {
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mTimer.purge();
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}
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mMediaPlayer.pause();
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mState = PAUSED;
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}
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}
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private void seek(int msec) {
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if (mState >= PREPARED) {
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mMediaPlayer.seekTo(msec);
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}
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}
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private void teardown() {
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mMediaPlayer.release();
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mState = ERROR;
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mNativePointer = 0;
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}
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private float getMaxTimeSeekable() {
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return mMediaPlayer.getDuration() / 1000.0f;
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}
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private native void nativeOnBuffering(int percent, int nativePointer);
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private native void nativeOnEnded(int nativePointer);
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private native void nativeOnPrepared(int duration, int width, int height, int nativePointer);
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private native void nativeOnTimeupdate(int position, int nativePointer);
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}
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