Prevent seeking when Android MediaPlayer reports that it's not possible.

media/base/android/media_player_bridge.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/base/android/media_player_bridge.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/basictypes.h"
 #include "base/logging.h"
@@ skipping 310 matching lines @@
 }
 
 void MediaPlayerBridge::SeekTo(base::TimeDelta timestamp) {
   // Record the time to seek when OnMediaPrepared() is called.
   pending_seek_ = timestamp;
   should_seek_on_prepare_ = true;
 
   if (j_media_player_bridge_.is_null())
     Prepare();
   else if (prepared_)
-    SeekInternal(timestamp);
+    SeekInternal(GetCurrentTime(), timestamp);
 }
 
 base::TimeDelta MediaPlayerBridge::GetCurrentTime() {
   if (!prepared_)
     return pending_seek_;
   JNIEnv* env = base::android::AttachCurrentThread();
   return base::TimeDelta::FromMilliseconds(
       Java_MediaPlayerBridge_getCurrentPosition(
           env, j_media_player_bridge_.obj()));
 }
@@ skipping 132 matching lines @@
 
 void MediaPlayerBridge::PauseInternal() {
   SetAudible(false);
 
   JNIEnv* env = base::android::AttachCurrentThread();
   Java_MediaPlayerBridge_pause(env, j_media_player_bridge_.obj());
   time_update_timer_.Stop();
 }
 
 void MediaPlayerBridge::PendingSeekInternal(const base::TimeDelta& time) {
-  SeekInternal(time);
+  SeekInternal(GetCurrentTime(), time);
 }
 
-void MediaPlayerBridge::SeekInternal(base::TimeDelta time) {
+bool MediaPlayerBridge::SeekInternal(const base::TimeDelta& current_time,
+                                     base::TimeDelta time) {
+  // Seeking on content like live streams may cause the media player to
+  // get stuck in an error state.
+  if (time < current_time && !CanSeekBackward())
+    return false;
+
+  if (time >= current_time && !CanSeekForward())
+    return false;
+
   if (time > duration_)
     time = duration_;
 
   // Seeking to an invalid position may cause media player to stuck in an
   // error state.
   if (time < base::TimeDelta()) {
     DCHECK_EQ(-1.0, time.InMillisecondsF());
-    return;
+    return false;
   }
 
   JNIEnv* env = base::android::AttachCurrentThread();
   CHECK(env);
   int time_msec = static_cast<int>(time.InMilliseconds());
   Java_MediaPlayerBridge_seekTo(
       env, j_media_player_bridge_.obj(), time_msec);
+  return true;
 }
 
 void MediaPlayerBridge::OnTimeUpdateTimerFired() {
   manager()->OnTimeUpdate(
       player_id(), GetCurrentTime(), base::TimeTicks::Now());
 }
 
 bool MediaPlayerBridge::RegisterMediaPlayerBridge(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
@@ skipping 16 matching lines @@
 
 GURL MediaPlayerBridge::GetUrl() {
   return url_;
 }
 
 GURL MediaPlayerBridge::GetFirstPartyForCookies() {
   return first_party_for_cookies_;
 }
 
 }  // namespace media