Enable pause/resume for RTSP streaming

When a stream is paused, RTSP Pause is also sent to the server.
Otherwise the buffering might continue until the memory runs out.
When the stream is resumed, RTSP Play will be sent in order to
resume the buffering.

Change-Id: I5dc1761140827c532451638c3fd3f34271e5b9ab
diff --git a/media/libmediaplayerservice/nuplayer/RTSPSource.cpp b/media/libmediaplayerservice/nuplayer/RTSPSource.cpp
index b70d550..a5ff0ca 100644
--- a/media/libmediaplayerservice/nuplayer/RTSPSource.cpp
+++ b/media/libmediaplayerservice/nuplayer/RTSPSource.cpp
@@ -119,6 +119,25 @@
     msg->postAndAwaitResponse(&dummy);
 }
 
+void NuPlayer::RTSPSource::pause() {
+    int64_t mediaDurationUs = 0;
+    getDuration(&mediaDurationUs);
+    for (size_t index = 0; index < mTracks.size(); index++) {
+        TrackInfo *info = &mTracks.editItemAt(index);
+        sp<AnotherPacketSource> source = info->mSource;
+
+        // Check if EOS or ERROR is received
+        if (source != NULL && source->isFinished(mediaDurationUs)) {
+            return;
+        }
+    }
+    mHandler->pause();
+}
+
+void NuPlayer::RTSPSource::resume() {
+    mHandler->resume();
+}
+
 status_t NuPlayer::RTSPSource::feedMoreTSData() {
     return mFinalResult;
 }