Do not report a duration for a live stream.

Also, do not clamp the playback position to the duration if the duration
is unknown.

Bug: 6672119
Change-Id: Id18bf3d45d4fe7d5edc2ac2da492ca5b4f217826

Author: jason-simmons

media/libaah_rtp/aah_rx_player.cpp

@@ -202,10 +202,9 @@ status_t AAH_RXPlayer::getCurrentPosition(int *msec) {
 }
 
 status_t AAH_RXPlayer::getDuration(int *msec) {
-    if (NULL != msec) {
-        *msec = 1;
-    }
-    return OK;
+    // Other media players are returning UNKNOWN_ERROR for streams of unknown
+    // length
+    return UNKNOWN_ERROR;
 }
 
 status_t AAH_RXPlayer::reset() {

media/libaah_rtp/aah_tx_player.cpp

@@ -410,7 +410,7 @@ void AAH_TXPlayer::onPrepareAsyncEvent() {
 
     mAudioFormat = mAudioSource->getFormat();
     if (!mAudioFormat->findInt64(kKeyDuration, &mDurationUs))
-        mDurationUs = 1;
+        mDurationUs = -1;
 
     const char* mime_type = NULL;
     if (!mAudioFormat->findCString(kKeyMIMEType, &mime_type)) {
@@ -1061,7 +1061,7 @@ void AAH_TXPlayer::onBufferingUpdate() {
             }
         } else {
             int64_t bitrate;
-            if (getBitrate_l(&bitrate)) {
+            if (getBitrate_l(&bitrate) && mDurationUs > 0) {
                 size_t cachedSize = mCachedSource->cachedSize();
                 int64_t cachedDurationUs = cachedSize * 8000000ll / bitrate;