AudioTrack API for delay/padding in offload (157cba49) · Commits · e / os / android_frameworks_base

api/current.txt

+2 −0

Original line number	Diff line number	Diff line
		@@ -23522,6 +23522,8 @@ package android.media {
		method public int setBufferSizeInFrames(int);
		method public int setLoopPoints(int, int, int);
		method public int setNotificationMarkerPosition(int);
		method public void setOffloadDelayPadding(int, int);
		method public void setOffloadEndOfStream();
		method public int setPlaybackHeadPosition(int);
		method public void setPlaybackParams(@NonNull android.media.PlaybackParams);
		method public void setPlaybackPositionUpdateListener(android.media.AudioTrack.OnPlaybackPositionUpdateListener);

core/jni/Android.bp

+1 −0

Original line number	Diff line number	Diff line
		@@ -275,6 +275,7 @@ cc_library_shared {
		"libselinux",
		"libandroidicu",
		"libmedia",
		"libmedia_helper",
		"libmediametrics",
		"libmeminfo",
		"libaudioclient",

core/jni/android_media_AudioTrack.cpp

+30 −0

Original line number	Diff line number	Diff line
		@@ -23,6 +23,7 @@
		#include "core_jni_helpers.h"

		#include <utils/Log.h>
		#include <media/AudioParameter.h>
		#include <media/AudioSystem.h>
		#include <media/AudioTrack.h>

		@@ -1310,6 +1311,33 @@ static jint android_media_AudioTrack_get_port_id(JNIEnv *env, jobject thiz) {
		return (jint)lpTrack->getPortId();
		}

		// ----------------------------------------------------------------------------
		static void android_media_AudioTrack_set_delay_padding(JNIEnv *env, jobject thiz,
		jint delayInFrames, jint paddingInFrames) {
		sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
		if (lpTrack == NULL) {
		jniThrowException(env, "java/lang/IllegalStateException",
		"AudioTrack not initialized");
		return;
		}
		AudioParameter param = AudioParameter();
		param.addInt(String8(AUDIO_OFFLOAD_CODEC_DELAY_SAMPLES), (int) delayInFrames);
		param.addInt(String8(AUDIO_OFFLOAD_CODEC_PADDING_SAMPLES), (int) paddingInFrames);
		lpTrack->setParameters(param.toString());
		}

		static void android_media_AudioTrack_set_eos(JNIEnv *env, jobject thiz) {
		sp<AudioTrack> lpTrack = getAudioTrack(env, thiz);
		if (lpTrack == NULL) {
		jniThrowException(env, "java/lang/IllegalStateException",
		"AudioTrack not initialized");
		return;
		}
		AudioParameter param = AudioParameter();
		param.addInt(String8("EOS"), 1);
		lpTrack->setParameters(param.toString());
		}

		// ----------------------------------------------------------------------------
		// ----------------------------------------------------------------------------
		static const JNINativeMethod gMethods[] = {
		@@ -1385,6 +1413,8 @@ static const JNINativeMethod gMethods[] = {
		(void *)android_media_AudioTrack_get_volume_shaper_state},
		{"native_setPresentation", "(II)I", (void *)android_media_AudioTrack_setPresentation},
		{"native_getPortId", "()I", (void *)android_media_AudioTrack_get_port_id},
		{"native_set_delay_padding", "(II)V", (void *)android_media_AudioTrack_set_delay_padding},
		{"native_set_eos", "()V", (void *)android_media_AudioTrack_set_eos},
		};

media/java/android/media/AudioTrack.java

+47 −0

Original line number	Diff line number	Diff line
		@@ -995,6 +995,50 @@ public class AudioTrack extends PlayerBase
		}
		}

		/**
		* Configures the delay and padding values for the current compressed stream playing
		* in offload mode.
		* This can only be used on a track successfully initialized with
		* {@link AudioTrack.Builder#setOffloadedPlayback(boolean)}. The unit is frames, where a
		* frame indicates the number of samples per channel, e.g. 100 frames for a stereo compressed
		* stream corresponds to 200 decoded interleaved PCM samples.
		* @param delayInFrames number of frames to be ignored at the beginning of the stream. A value
		* of 0 indicates no padding is to be applied.
		* @param paddingInFrames number of frames to be ignored at the end of the stream. A value of 0
		* of 0 indicates no delay is to be applied.
		*/
		public void setOffloadDelayPadding(int delayInFrames, int paddingInFrames) {
		if (paddingInFrames < 0) {
		throw new IllegalArgumentException("Illegal negative padding");
		}
		if (delayInFrames < 0) {
		throw new IllegalArgumentException("Illegal negative delay");
		}
		if (!mOffloaded) {
		throw new IllegalStateException("Illegal use of delay/padding on non-offloaded track");
		}
		if (mState == STATE_UNINITIALIZED) {
		throw new IllegalStateException("Uninitialized track");
		}
		native_set_delay_padding(delayInFrames, paddingInFrames);
		}

		/**
		* Declares that the last write() operation on this track provided the last buffer of this
		* stream.
		* After the end of stream, previously set padding and delay values are ignored.
		* Use this method in the same thread as any write() operation.
		*/
		public void setOffloadEndOfStream() {
		if (!mOffloaded) {
		throw new IllegalStateException("EOS not supported on non-offloaded track");
		}
		if (mState == STATE_UNINITIALIZED) {
		throw new IllegalStateException("Uninitialized track");
		}
		native_set_eos();
		}

		/**
		* Returns whether direct playback of an audio format with the provided attributes is
		* currently supported on the system.
		@@ -3457,6 +3501,9 @@ public class AudioTrack extends PlayerBase

		private native int native_getPortId();

		private native void native_set_delay_padding(int delayInFrames, int paddingInFrames);
		private native void native_set_eos();

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