Merge changes from topic "startAudioSource_issues" am: 45da2609b7 am: 28ccf9bf8e (22483664) · Commits · e / os / android_frameworks_base

media/java/android/media/HwAudioSource.java

+19 −4

Original line number	Diff line number	Diff line
		@@ -35,7 +35,13 @@ public class HwAudioSource extends PlayerBase {
		private final AudioDeviceInfo mAudioDeviceInfo;
		private final AudioAttributes mAudioAttributes;

		private int mNativeHandle;
		/**
		* The value of the native handle encodes the HwAudioSource state.
		* The native handle returned by {@link AudioSystem#startAudioSource} is either valid
		* (aka > 0, so successfully started) or hosting an error code (negative).
		* 0 corresponds to an untialized or stopped HwAudioSource.
		*/
		private int mNativeHandle = 0;

		/**
		* Class constructor for a hardware audio source based player.
		@@ -127,29 +133,38 @@ public class HwAudioSource extends PlayerBase {

		/**
		* Starts the playback from {@link AudioDeviceInfo}.
		* Starts does not return any error code, caller must check {@link HwAudioSource#isPlaying} to
		* ensure the state of the HwAudioSource encoded in {@link mNativeHandle}.
		*/
		public void start() {
		Preconditions.checkState(!isPlaying(), "HwAudioSource is currently playing");
		baseStart();
		mNativeHandle = AudioSystem.startAudioSource(
		mAudioDeviceInfo.getPort().activeConfig(),
		mAudioAttributes);
		if (isPlaying()) {
		baseStart();
		}
		}

		/**
		* Checks whether the HwAudioSource player is playing.
		* It checks the state of the HwAudioSource encoded in {@link HwAudioSource#isPlaying}.
		* 0 corresponds to a stopped or uninitialized HwAudioSource.
		* Negative value corresponds to a status reported by {@link AudioSystem#startAudioSource} to
		* indicate a failure when trying to start the HwAudioSource.
		*
		* @return true if currently playing, false otherwise
		*/
		public boolean isPlaying() {
		return mNativeHandle != 0;
		return mNativeHandle > 0;
		}

		/**
		* Stops the playback from {@link AudioDeviceInfo}.
		*/
		public void stop() {
		baseStop();
		if (mNativeHandle > 0) {
		baseStop();
		AudioSystem.stopAudioSource(mNativeHandle);
		mNativeHandle = 0;
		}