Added support for audio sessions in MediaPlayer and AudioTrack. (619346f9) · Commits · e / os / android_frameworks_base

core/jni/android_media_AudioTrack.cpp

+29 −4

Original line number	Diff line number	Diff line
		@@ -166,7 +166,7 @@ static void audioCallback(int event, void* user, void *info) {
		static int
		android_media_AudioTrack_native_setup(JNIEnv *env, jobject thiz, jobject weak_this,
		jint streamType, jint sampleRateInHertz, jint channels,
		jint audioFormat, jint buffSizeInBytes, jint memoryMode)
		jint audioFormat, jint buffSizeInBytes, jint memoryMode, jintArray jSession)
		{
		LOGV("sampleRate=%d, audioFormat(from Java)=%d, channels=%x, buffSize=%d",
		sampleRateInHertz, audioFormat, channels, buffSizeInBytes);
		@@ -253,6 +253,20 @@ android_media_AudioTrack_native_setup(JNIEnv *env, jobject thiz, jobject weak_th

		lpJniStorage->mStreamType = atStreamType;

		jint* nSession = NULL;
		if (jSession) {
		nSession = (jint *) env->GetPrimitiveArrayCritical(jSession, NULL);
		if (nSession == NULL) {
		LOGE("Error creating AudioTrack: Error retrieving session id pointer");
		delete lpJniStorage;
		return AUDIOTRACK_ERROR;
		}
		} else {
		LOGE("Error creating AudioTrack: invalid session ID pointer");
		delete lpJniStorage;
		return AUDIOTRACK_ERROR;
		}

		// create the native AudioTrack object
		AudioTrack* lpTrack = new AudioTrack();
		if (lpTrack == NULL) {
		@@ -273,7 +287,8 @@ android_media_AudioTrack_native_setup(JNIEnv *env, jobject thiz, jobject weak_th
		audioCallback, &(lpJniStorage->mCallbackData),//callback, callback data (user)
		0,// notificationFrames == 0 since not using EVENT_MORE_DATA to feed the AudioTrack
		0,// shared mem
		true);// thread can call Java
		true,// thread can call Java
		nSession[0]);// audio session ID

		} else if (memoryMode == javaAudioTrackFields.MODE_STATIC) {
		// AudioTrack is using shared memory
		@@ -293,7 +308,8 @@ android_media_AudioTrack_native_setup(JNIEnv *env, jobject thiz, jobject weak_th
		audioCallback, &(lpJniStorage->mCallbackData),//callback, callback data (user));
		0,// notificationFrames == 0 since not using EVENT_MORE_DATA to feed the AudioTrack
		lpJniStorage->mMemBase,// shared mem
		true);// thread can call Java
		true,// thread can call Java
		nSession[0]);// audio session ID
		}

		if (lpTrack->initCheck() != NO_ERROR) {
		@@ -301,6 +317,12 @@ android_media_AudioTrack_native_setup(JNIEnv *env, jobject thiz, jobject weak_th
		goto native_init_failure;
		}

		// read the audio session ID back from AudioTrack in case we create a new session
		nSession[0] = lpTrack->getSessionId();

		env->ReleasePrimitiveArrayCritical(jSession, nSession, 0);
		nSession = NULL;

		// save our newly created C++ AudioTrack in the "nativeTrackInJavaObj" field
		// of the Java object (in mNativeTrackInJavaObj)
		env->SetIntField(thiz, javaAudioTrackFields.nativeTrackInJavaObj, (int)lpTrack);
		@@ -317,6 +339,9 @@ native_init_failure:
		env->SetIntField(thiz, javaAudioTrackFields.nativeTrackInJavaObj, 0);

		native_track_failure:
		if (nSession != NULL) {
		env->ReleasePrimitiveArrayCritical(jSession, nSession, 0);
		}
		env->DeleteGlobalRef(lpJniStorage->mCallbackData.audioTrack_class);
		env->DeleteGlobalRef(lpJniStorage->mCallbackData.audioTrack_ref);
		delete lpJniStorage;
		@@ -785,7 +810,7 @@ static JNINativeMethod gMethods[] = {
		{"native_stop", "()V", (void *)android_media_AudioTrack_stop},
		{"native_pause", "()V", (void *)android_media_AudioTrack_pause},
		{"native_flush", "()V", (void *)android_media_AudioTrack_flush},
		{"native_setup", "(Ljava/lang/Object;IIIIII)I",
		{"native_setup", "(Ljava/lang/Object;IIIIII[I)I",
		(void *)android_media_AudioTrack_native_setup},
		{"native_finalize", "()V", (void *)android_media_AudioTrack_native_finalize},
		{"native_release", "()V", (void *)android_media_AudioTrack_native_release},

include/media/IMediaPlayerService.h

+5 −2

Original line number	Diff line number	Diff line
		@@ -40,8 +40,11 @@ public:

		virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid) = 0;
		virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid) = 0;
		virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url, const KeyedVector<String8, String8> *headers = NULL) = 0;
		virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length) = 0;
		virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client,
		const char* url, const KeyedVector<String8, String8> *headers = NULL,
		int audioSessionId = 0) = 0;
		virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client,
		int fd, int64_t offset, int64_t length, int audioSessionId) = 0;
		virtual sp<IMemory> decode(const char* url, uint32_t pSampleRate, int pNumChannels, int* pFormat) = 0;
		virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t pSampleRate, int pNumChannels, int* pFormat) = 0;
		virtual sp<IOMX> getOMX() = 0;

include/media/mediaplayer.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -172,6 +172,8 @@ public:
		status_t getMetadata(bool update_only, bool apply_filter, Parcel *metadata);
		status_t suspend();
		status_t resume();
		status_t setAudioSessionId(int sessionId);
		int getAudioSessionId();
		private:
		void clear_l();
		status_t seekTo_l(int msec);
		@@ -198,6 +200,7 @@ private:
		float mRightVolume;
		int mVideoWidth;
		int mVideoHeight;
		int mAudioSessionId;
		};

		}; // namespace android

media/java/android/media/AudioTrack.java

+68 −2

Original line number	Diff line number	Diff line
		@@ -210,6 +210,10 @@ public class AudioTrack
		* @see AudioFormat#ENCODING_PCM_16BIT
		*/
		private int mAudioFormat = AudioFormat.ENCODING_PCM_16BIT;
		/**
		* Audio session ID
		*/
		private int mSessionId = 0;


		//--------------------------------
		@@ -257,6 +261,48 @@ public class AudioTrack
		*/
		public AudioTrack(int streamType, int sampleRateInHz, int channelConfig, int audioFormat,
		int bufferSizeInBytes, int mode)
		throws IllegalArgumentException {
		this(streamType, sampleRateInHz, channelConfig, audioFormat,
		bufferSizeInBytes, mode, 0);
		}

		/**
		* Class constructor with audio session. Use this constructor when the AudioTrack must be
		* attached to a particular audio session. The primary use of the audio session ID is to
		* associate audio effects to a particular instance of AudioTrack: if an audio session ID
		* is provided when creating an AudioEffect, this effect will be applied only to audio tracks
		* and media players in the same session and not to the output mix.
		* When an AudioTrack is created without specifying a session, it will create its own session
		* which can be retreived by calling the {@link #getAudioSessionId()} method.
		* If a session ID is provided, this AudioTrack will share effects attached to this session
		* with all other media players or audio tracks in the same session.
		* @param streamType the type of the audio stream. See
		* {@link AudioManager#STREAM_VOICE_CALL}, {@link AudioManager#STREAM_SYSTEM},
		* {@link AudioManager#STREAM_RING}, {@link AudioManager#STREAM_MUSIC} and
		* {@link AudioManager#STREAM_ALARM}
		* @param sampleRateInHz the sample rate expressed in Hertz. Examples of rates are (but
		* not limited to) 44100, 22050 and 11025.
		* @param channelConfig describes the configuration of the audio channels.
		* See {@link AudioFormat#CHANNEL_OUT_MONO} and
		* {@link AudioFormat#CHANNEL_OUT_STEREO}
		* @param audioFormat the format in which the audio data is represented.
		* See {@link AudioFormat#ENCODING_PCM_16BIT} and
		* {@link AudioFormat#ENCODING_PCM_8BIT}
		* @param bufferSizeInBytes the total size (in bytes) of the buffer where audio data is read
		* from for playback. If using the AudioTrack in streaming mode, you can write data into
		* this buffer in smaller chunks than this size. If using the AudioTrack in static mode,
		* this is the maximum size of the sound that will be played for this instance.
		* See {@link #getMinBufferSize(int, int, int)} to determine the minimum required buffer size
		* for the successful creation of an AudioTrack instance in streaming mode. Using values
		* smaller than getMinBufferSize() will result in an initialization failure.
		* @param mode streaming or static buffer. See {@link #MODE_STATIC} and {@link #MODE_STREAM}
		* @param sessionId Id of audio session the AudioTrack must be attached to
		* @throws java.lang.IllegalArgumentException
		// FIXME: unhide.
		* @hide
		*/
		public AudioTrack(int streamType, int sampleRateInHz, int channelConfig, int audioFormat,
		int bufferSizeInBytes, int mode, int sessionId)
		throws IllegalArgumentException {
		mState = STATE_UNINITIALIZED;

		@@ -269,15 +315,23 @@ public class AudioTrack

		audioBuffSizeCheck(bufferSizeInBytes);

		if (sessionId < 0) {
		throw (new IllegalArgumentException("Invalid audio session ID: "+sessionId));
		}

		int[] session = new int[1];
		session[0] = sessionId;
		// native initialization
		int initResult = native_setup(new WeakReference<AudioTrack>(this),
		mStreamType, mSampleRate, mChannels, mAudioFormat,
		mNativeBufferSizeInBytes, mDataLoadMode);
		mNativeBufferSizeInBytes, mDataLoadMode, session);
		if (initResult != SUCCESS) {
		loge("Error code "+initResult+" when initializing AudioTrack.");
		return; // with mState == STATE_UNINITIALIZED
		}

		mSessionId = session[0];

		if (mDataLoadMode == MODE_STATIC) {
		mState = STATE_NO_STATIC_DATA;
		} else {
		@@ -590,6 +644,17 @@ public class AudioTrack
		}
		}

		/**
		* Returns the audio session ID.
		*
		* @return the ID of the audio session this AudioTrack belongs to.
		// FIXME: unhide.
		// FIXME: link to AudioEffect class when public.
		* @hide
		*/
		public int getAudioSessionId() {
		return mSessionId;
		}

		//--------------------------------------------------------------------------
		// Initialization / configuration
		@@ -1012,7 +1077,7 @@ public class AudioTrack

		private native final int native_setup(Object audiotrack_this,
		int streamType, int sampleRate, int nbChannels, int audioFormat,
		int buffSizeInBytes, int mode);
		int buffSizeInBytes, int mode, int[] sessionId);

		private native final void native_finalize();

		@@ -1056,6 +1121,7 @@ public class AudioTrack
		static private native final int native_get_min_buff_size(
		int sampleRateInHz, int channelConfig, int audioFormat);

		private native final int native_get_session_id();

		//---------------------------------------------------------
		// Utility methods

media/java/android/media/MediaPlayer.java

+44 −0

Original line number	Diff line number	Diff line
		@@ -423,6 +423,18 @@ import java.lang.ref.WeakReference;
		* <td>Successful invoke of this method in a valid state transfers the
		* object to the <em>Stopped</em> state. Calling this method in an
		* invalid state transfers the object to the <em>Error</em> state.</p></td></tr>
		* <tr><td>setAudioSessionId </p></td>
		* <td>{Idle} </p></td>
		* <td>{Initialized, Prepared, Started, Paused, Stopped, PlaybackCompleted,
		* Error} </p></td>
		* <td>This method must be called in idle state as the audio session ID must be known before
		* calling setDataSource. Calling it does not change the object state. </p></td></tr>
		* <tr><td>getAudioSessionId </p></td>
		* <td>any </p></td>
		* <td>{} </p></td>
		* <td>This method can be called in any state and calling it does not change
		* the object state. </p></td></tr>
		*
		* </table>
		*
		* <a name="Permissions"></a>
		@@ -1158,6 +1170,38 @@ public class MediaPlayer
		*/
		public native Bitmap getFrameAt(int msec) throws IllegalStateException;

		/**
		* Sets the audio session ID.
		*
		* @param sessionId: the audio session ID.
		* The audio session ID is a system wide unique identifier for the audio stream played by
		* this MediaPlayer instance.
		* The primary use of the audio session ID is to associate audio effects to a particular
		* instance of MediaPlayer: if an audio session ID is provided when creating an audio effect,
		* this effect will be applied only to the audio content of media players within the same
		* audio session and not to the output mix.
		* When created, a MediaPlayer instance automatically generates its own audio session ID.
		* However, it is possible to force this player to be part of an already existing audio session
		* by calling this method.
		* This method must be called before one of the overloaded <code> setDataSource </code> methods.
		* @throws IllegalStateException if it is called in an invalid state
		*
		// FIXME: unhide.
		// FIXME: link to AudioEffect class when public.
		* @hide
		*/
		public native void setAudioSessionId(int sessionId) throws IllegalArgumentException, IllegalStateException;

		/**
		* Returns the audio session ID.
		*
		* @return the audio session ID. {@see #setAudioSessionId(int)}.
		* Note that the audio session ID is 0 only if a problem occured when the MediaPlayer was contructed.
		// FIXME: unhide.
		* @hide
		*/
		public native int getAudioSessionId();

		/**
		* @param request Parcel destinated to the media player. The
		* Interface token must be set to the IMediaPlayer