Add the ability to query the amount of cached data to MediaExtractor. (74a78b0f) · Commits · e / os / android_frameworks_base

api/current.txt

+2 −0

Original line number	Diff line number	Diff line
		@@ -11063,11 +11063,13 @@ package android.media {
		ctor public MediaExtractor();
		method public boolean advance();
		method public int countTracks();
		method public long getCachedDuration();
		method public boolean getSampleCryptoInfo(android.media.MediaCodec.CryptoInfo);
		method public int getSampleFlags();
		method public long getSampleTime();
		method public int getSampleTrackIndex();
		method public java.util.Map<java.lang.String, java.lang.Object> getTrackFormat(int);
		method public boolean hasCacheReachedEndOfStream();
		method public int readSampleData(java.nio.ByteBuffer, int);
		method public final void release();
		method public void seekTo(long);

media/java/android/media/MediaExtractor.java

+14 −0

Original line number	Diff line number	Diff line
		@@ -245,6 +245,20 @@ final public class MediaExtractor {
		*/
		public native boolean getSampleCryptoInfo(MediaCodec.CryptoInfo info);

		/** Returns an estimate of how much data is presently cached in memory
		expressed in microseconds. Returns -1 if that information is unavailable
		or not applicable (no cache).
		*/
		public native long getCachedDuration();

		/** Returns true iff we are caching data and the cache has reached the
		* end of the data stream (for now, a future seek may of course restart
		* the fetching of data).
		* This API only returns a meaningful result if {link #getCachedDuration}
		* indicates the presence of a cache, i.e. does NOT return -1.
		*/
		public native boolean hasCacheReachedEndOfStream();

		private static native final void native_init();
		private native final void native_setup();
		private native final void native_finalize();

media/jni/android_media_MediaExtractor.cpp

+46 −0

Original line number	Diff line number	Diff line
		@@ -198,6 +198,10 @@ status_t JMediaExtractor::getSampleMeta(sp<MetaData> *sampleMeta) {
		return mImpl->getSampleMeta(sampleMeta);
		}

		bool JMediaExtractor::getCachedDuration(int64_t durationUs, bool eos) const {
		return mImpl->getCachedDuration(durationUs, eos);
		}

		} // namespace android

		////////////////////////////////////////////////////////////////////////////////
		@@ -593,6 +597,42 @@ static void android_media_MediaExtractor_setDataSourceFd(
		}
		}

		static jlong android_media_MediaExtractor_getCachedDurationUs(
		JNIEnv *env, jobject thiz) {
		sp<JMediaExtractor> extractor = getMediaExtractor(env, thiz);

		if (extractor == NULL) {
		jniThrowException(env, "java/lang/IllegalStateException", NULL);
		return -1ll;
		}

		int64_t cachedDurationUs;
		bool eos;
		if (!extractor->getCachedDuration(&cachedDurationUs, &eos)) {
		return -1ll;
		}

		return cachedDurationUs;
		}

		static jboolean android_media_MediaExtractor_hasCacheReachedEOS(
		JNIEnv *env, jobject thiz) {
		sp<JMediaExtractor> extractor = getMediaExtractor(env, thiz);

		if (extractor == NULL) {
		jniThrowException(env, "java/lang/IllegalStateException", NULL);
		return true;
		}

		int64_t cachedDurationUs;
		bool eos;
		if (!extractor->getCachedDuration(&cachedDurationUs, &eos)) {
		return true;
		}

		return eos;
		}

		static void android_media_MediaExtractor_native_finalize(
		JNIEnv *env, jobject thiz) {
		android_media_MediaExtractor_release(env, thiz);
		@@ -641,6 +681,12 @@ static JNINativeMethod gMethods[] = {

		{ "setDataSource", "(Ljava/io/FileDescriptor;JJ)V",
		(void *)android_media_MediaExtractor_setDataSourceFd },

		{ "getCachedDuration", "()J",
		(void *)android_media_MediaExtractor_getCachedDurationUs },

		{ "hasCacheReachedEndOfStream", "()Z",
		(void *)android_media_MediaExtractor_hasCacheReachedEOS },
		};

		int register_android_media_MediaExtractor(JNIEnv *env) {

media/jni/android_media_MediaExtractor.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -53,6 +53,8 @@ struct JMediaExtractor : public RefBase {
		status_t getSampleFlags(uint32_t *sampleFlags);
		status_t getSampleMeta(sp<MetaData> *sampleMeta);

		bool getCachedDuration(int64_t durationUs, bool eos) const;

		protected:
		virtual ~JMediaExtractor();