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Diffstat (limited to 'src/com/android/camera/SoundClips.java')
| -rw-r--r-- | src/com/android/camera/SoundClips.java | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/src/com/android/camera/SoundClips.java b/src/com/android/camera/SoundClips.java new file mode 100644 index 000000000..8155c03dc --- /dev/null +++ b/src/com/android/camera/SoundClips.java @@ -0,0 +1,197 @@ +/* + * Copyright (C) 2012 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package com.android.camera; + +import android.annotation.TargetApi; +import android.content.Context; +import android.media.AudioManager; +import android.media.MediaActionSound; +import android.media.SoundPool; +import android.util.Log; + +import com.android.gallery3d.R; +import com.android.gallery3d.common.ApiHelper; + +/* + * This class controls the sound playback according to the API level. + */ +public class SoundClips { + // Sound actions. + public static final int FOCUS_COMPLETE = 0; + public static final int START_VIDEO_RECORDING = 1; + public static final int STOP_VIDEO_RECORDING = 2; + + public interface Player { + public void release(); + public void play(int action); + } + + public static Player getPlayer(Context context) { + if (ApiHelper.HAS_MEDIA_ACTION_SOUND) { + return new MediaActionSoundPlayer(); + } else { + return new SoundPoolPlayer(context); + } + } + + public static int getAudioTypeForSoundPool() { + return ApiHelper.getIntFieldIfExists(AudioManager.class, + "STREAM_SYSTEM_ENFORCED", null, AudioManager.STREAM_RING); + } + + /** + * This class implements SoundClips.Player using MediaActionSound, + * which exists since API level 16. + */ + @TargetApi(ApiHelper.VERSION_CODES.JELLY_BEAN) + private static class MediaActionSoundPlayer implements Player { + private static final String TAG = "MediaActionSoundPlayer"; + private MediaActionSound mSound; + + @Override + public void release() { + if (mSound != null) { + mSound.release(); + mSound = null; + } + } + + public MediaActionSoundPlayer() { + mSound = new MediaActionSound(); + mSound.load(MediaActionSound.START_VIDEO_RECORDING); + mSound.load(MediaActionSound.STOP_VIDEO_RECORDING); + mSound.load(MediaActionSound.FOCUS_COMPLETE); + } + + @Override + public synchronized void play(int action) { + switch(action) { + case FOCUS_COMPLETE: + mSound.play(MediaActionSound.FOCUS_COMPLETE); + break; + case START_VIDEO_RECORDING: + mSound.play(MediaActionSound.START_VIDEO_RECORDING); + break; + case STOP_VIDEO_RECORDING: + mSound.play(MediaActionSound.STOP_VIDEO_RECORDING); + break; + default: + Log.w(TAG, "Unrecognized action:" + action); + } + } + } + + /** + * This class implements SoundClips.Player using SoundPool, which + * exists since API level 1. + */ + private static class SoundPoolPlayer implements + Player, SoundPool.OnLoadCompleteListener { + + private static final String TAG = "SoundPoolPlayer"; + private static final int NUM_SOUND_STREAMS = 1; + private static final int[] SOUND_RES = { // Soundtrack res IDs. + R.raw.focus_complete, + R.raw.video_record + }; + + // ID returned by load() should be non-zero. + private static final int ID_NOT_LOADED = 0; + + // Maps a sound action to the id; + private final int[] mSoundRes = {0, 1, 1}; + // Store the context for lazy loading. + private Context mContext; + // mSoundPool is created every time load() is called and cleared every + // time release() is called. + private SoundPool mSoundPool; + // Sound ID of each sound resources. Given when the sound is loaded. + private final int[] mSoundIDs; + private final boolean[] mSoundIDReady; + private int mSoundIDToPlay; + + public SoundPoolPlayer(Context context) { + mContext = context; + + mSoundIDToPlay = ID_NOT_LOADED; + + mSoundPool = new SoundPool(NUM_SOUND_STREAMS, getAudioTypeForSoundPool(), 0); + mSoundPool.setOnLoadCompleteListener(this); + + mSoundIDs = new int[SOUND_RES.length]; + mSoundIDReady = new boolean[SOUND_RES.length]; + for (int i = 0; i < SOUND_RES.length; i++) { + mSoundIDs[i] = mSoundPool.load(mContext, SOUND_RES[i], 1); + mSoundIDReady[i] = false; + } + } + + @Override + public synchronized void release() { + if (mSoundPool != null) { + mSoundPool.release(); + mSoundPool = null; + } + } + + @Override + public synchronized void play(int action) { + if (action < 0 || action >= mSoundRes.length) { + Log.e(TAG, "Resource ID not found for action:" + action + " in play()."); + return; + } + + int index = mSoundRes[action]; + if (mSoundIDs[index] == ID_NOT_LOADED) { + // Not loaded yet, load first and then play when the loading is complete. + mSoundIDs[index] = mSoundPool.load(mContext, SOUND_RES[index], 1); + mSoundIDToPlay = mSoundIDs[index]; + } else if (!mSoundIDReady[index]) { + // Loading and not ready yet. + mSoundIDToPlay = mSoundIDs[index]; + } else { + mSoundPool.play(mSoundIDs[index], 1f, 1f, 0, 0, 1f); + } + } + + @Override + public void onLoadComplete(SoundPool pool, int soundID, int status) { + if (status != 0) { + Log.e(TAG, "loading sound tracks failed (status=" + status + ")"); + for (int i = 0; i < mSoundIDs.length; i++ ) { + if (mSoundIDs[i] == soundID) { + mSoundIDs[i] = ID_NOT_LOADED; + break; + } + } + return; + } + + for (int i = 0; i < mSoundIDs.length; i++ ) { + if (mSoundIDs[i] == soundID) { + mSoundIDReady[i] = true; + break; + } + } + + if (soundID == mSoundIDToPlay) { + mSoundIDToPlay = ID_NOT_LOADED; + mSoundPool.play(soundID, 1f, 1f, 0, 0, 1f); + } + } + } +} |