Android车机系统虚拟音频源播放器CarVirtualPlayer

package android.media; import android.annotation.NonNull; import android.annotation.SuppressLint; import android.os.Build; import android.util.Log; /** * The CarVirtualPlayer class manages and plays car virtual audio resources for applications. * mega porting * */ @SuppressLint("NotCloseable") public class CarVirtualPlayer extends PlayerBase { private final static String TAG = "CarVirtualPlayer"; private static final boolean DEBUG = !"user".equals(Build.TYPE); private final Object mPlayStateLock; public CarVirtualPlayer(int streamType) { this(new AudioAttributes.Builder().setInternalLegacyStreamType(streamType).build()); PlayerBase.deprecateStreamTypeForPlayback(streamType, "CarVirtualPlayer", "CarVirtualPlayer()"); } public CarVirtualPlayer(@NonNull AudioAttributes attributes) { super(attributes, AudioPlaybackConfiguration.PLAYER_TYPE_UNKNOWN); mPlayStateLock = new Object(); baseRegisterPlayer(); Log.i(TAG, "create"); } /** * Release the SoundPool resources. * * Release all memory and native resources used by the SoundPool * object. The SoundPool can no longer be used and the reference * should be set to null. */ public final void release() { if (DEBUG) Log.d(TAG, "release called"); synchronized(mPlayStateLock) { baseRelease(); } } protected void finalize() { release(); } public final void play() { if (DEBUG) Log.d(TAG, "play called"); synchronized(mPlayStateLock) { baseStart(); } } public void pause() { if (DEBUG) Log.d(TAG, "pause called"); synchronized(mPlayStateLock) { basePause(); } } public void stop() { if (DEBUG) Log.d(TAG, "stop called"); synchronized(mPlayStateLock) { baseStop(); } } //-------------------------------------------------------------------------- // Initialization / configuration //-------------------- @Override void playerSetVolume(boolean muting, float leftVolume, float rightVolume) { // not used here to control the player volume directly, but used to mute/unmute if (DEBUG) Log.d(TAG, "playerSetVolume muting: " + muting + ", leftVolume: " + leftVolume + ", rightVolume: " + rightVolume); } @Override int playerApplyVolumeShaper(VolumeShaper.Configuration configuration, VolumeShaper.Operation operation) { if (DEBUG) Log.d(TAG, "playerApplyVolumeShaper configuration: " + configuration + ", operation: " + operation); return -1; } @Override VolumeShaper.State playerGetVolumeShaperState(int id) { if (DEBUG) Log.d(TAG, "playerGetVolumeShaperState id: " + id); return null; } //-------------------------------------------------------------------------- // Audio effects management //-------------------- @Override int playerSetAuxEffectSendLevel(boolean muting, float level) { if (DEBUG) Log.d(TAG, "playerSetAuxEffectSendLevel muting: " + muting + ", level"); // no aux send functionality so no-op return AudioSystem.SUCCESS; } //--------------------------------------------------------- // Methods for IPlayer interface //-------------------- @Override void playerStart() { if (DEBUG) Log.d(TAG, "playerStart called"); // FIXME implement resuming any paused sound } @Override void playerPause() { if (DEBUG) Log.d(TAG, "playerPause called"); // FIXME implement pausing any playing sound } @Override void playerStop() { if (DEBUG) Log.d(TAG, "playerStop called"); // FIXME implement pausing any playing sound } }