Don't uninitialize FFmpegVideoDecodeEngine if we haven't initialized it.

This was originally commited as r70077 but was accidentally reverted.

BUG=67303
TEST=media_unittests

Review URL: http://codereview.chromium.org/6046006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@70669 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 13 insertions, 5 deletions

diff --git a/media/filters/ffmpeg_video_decoder.cc b/media/filters/ffmpeg_video_decoder.cc
index b3c21b944..bdaee8c 100644
--- a/media/filters/ffmpeg_video_decoder.cc
+++ b/media/filters/ffmpeg_video_decoder.cc
@@ -97,6 +97,7 @@ void FFmpegVideoDecoder::Initialize(DemuxerStream* demuxer_stream,
   config.opaque_context = av_stream;
   config.width = width_;
   config.height = height_;
+  state_ = kInitializing;
   decode_engine_->Initialize(message_loop(), this, NULL, config);
 }
 
@@ -139,7 +140,10 @@ void FFmpegVideoDecoder::Stop(FilterCallback* callback) {
   DCHECK(!uninitialize_callback_.get());
 
   uninitialize_callback_.reset(callback);
-  decode_engine_->Uninitialize();
+  if (state_ != kUnInitialized)
+    decode_engine_->Uninitialize();
+  else
+    OnUninitializeComplete();
 }
 
 void FFmpegVideoDecoder::OnUninitializeComplete() {
diff --git a/media/filters/ffmpeg_video_decoder.h b/media/filters/ffmpeg_video_decoder.h
index 617dfc1..76e60e8 100644
--- a/media/filters/ffmpeg_video_decoder.h
+++ b/media/filters/ffmpeg_video_decoder.h
@@ -72,6 +72,7 @@ class FFmpegVideoDecoder : public VideoDecoder,
 
   enum DecoderState {
     kUnInitialized,
+    kInitializing,
     kNormal,
     kFlushCodec,
     kDecodeFinished,
diff --git a/media/filters/ffmpeg_video_decoder_unittest.cc b/media/filters/ffmpeg_video_decoder_unittest.cc
index 9c1cc4c..779a48f 100644
--- a/media/filters/ffmpeg_video_decoder_unittest.cc
+++ b/media/filters/ffmpeg_video_decoder_unittest.cc
@@ -160,12 +160,15 @@ class FFmpegVideoDecoderTest : public testing::Test {
   }
 
   virtual ~FFmpegVideoDecoderTest() {
-    // We had to set this because not all tests had initialized the engine.
-    engine_->event_handler_ = decoder_.get();
     EXPECT_CALL(callback_, OnFilterCallback());
     EXPECT_CALL(callback_, OnCallbackDestroyed());
-    EXPECT_CALL(*engine_, Uninitialize())
-        .WillOnce(EngineUninitialize(engine_));
+
+    // The presence of an event handler means we need to uninitialize.
+    if (engine_->event_handler_) {
+      EXPECT_CALL(*engine_, Uninitialize())
+          .WillOnce(EngineUninitialize(engine_));
+    }
+
     decoder_->Stop(callback_.NewCallback());
 
     // Finish up any remaining tasks.