libstagefright: Add support to seek to zero

- Add CAN_SEEK_TO_ZERO flag in MediaExtractor to allow
  seek to zero, when previous button is pressed, for clip
  that can't be seeked.

Change-Id: Ic2761cc5bac2403ee1339da77ad02fde942a3437

1 files changed, 3 insertions, 1 deletions

diff --git a/media/libstagefright/AwesomePlayer.cpp b/media/libstagefright/AwesomePlayer.cpp
index 1e2625a..48b6371 100644
--- a/media/libstagefright/AwesomePlayer.cpp
+++ b/media/libstagefright/AwesomePlayer.cpp
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2009 The Android Open Source Project
+ * Copyright (c) 2012, The Linux Foundation. All rights reserved.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -1297,7 +1298,8 @@ status_t AwesomePlayer::getPosition(int64_t *positionUs) {
 status_t AwesomePlayer::seekTo(int64_t timeUs) {
     ATRACE_CALL();
 
-    if (mExtractorFlags & MediaExtractor::CAN_SEEK) {
+    if (((timeUs == 0) && (mExtractorFlags & MediaExtractor::CAN_SEEK_TO_ZERO)) ||
+        (mExtractorFlags & MediaExtractor::CAN_SEEK)) {
         Mutex::Autolock autoLock(mLock);
         return seekTo_l(timeUs);
     }