Don't reinit encoder when rotation changes.

webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc

Index: webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
diff --git a/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc b/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
index c4c600d67e328eb96f00cf7e68346eba07db9353..2b5cff028011e183ddb2321a131d8d5c86ef6b37 100644
--- a/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
+++ b/webrtc/modules/video_coding/codecs/vp8/test/vp8_impl_unittest.cc
@@ -76,6 +76,7 @@ Vp8UnitTestEncodeCompleteCallback::OnEncodedImage(
   encoded_frame_->_timeStamp = encoded_frame._timeStamp;
   encoded_frame_->_frameType = encoded_frame._frameType;
   encoded_frame_->_completeFrame = encoded_frame._completeFrame;
+  encoded_frame_->rotation_ = encoded_frame.rotation_;
   encoded_frame_->qp_ = encoded_frame.qp_;
   encode_complete_ = true;
   return Result(Result::OK, 0);
@@ -252,6 +253,26 @@ TEST_F(TestVp8Impl, EncoderParameterTest) {
   EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, decoder_->InitDecode(&codec_inst_, 1));
 }
 
+// We only test the encoder here, since the decoded frame rotation is set based
+// on the CVO RTP header extension in VCMDecodedFrameCallback::Decoded.
+// TODO(brandtr): Consider passing through the rotation flag through the decoder
+// in the same way as done in the encoder.
+TEST_F(TestVp8Impl, EncodedRotationEqualsInputRotation) {
+  SetUpEncodeDecode();
+
+  input_frame_->set_rotation(kVideoRotation_0);
+  EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
+            encoder_->Encode(*input_frame_, nullptr, nullptr));
+  WaitForEncodedFrame();
+  EXPECT_EQ(kVideoRotation_0, encoded_frame_.rotation_);
+
+  input_frame_->set_rotation(kVideoRotation_90);
+  EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
+            encoder_->Encode(*input_frame_, nullptr, nullptr));
+  WaitForEncodedFrame();
+  EXPECT_EQ(kVideoRotation_90, encoded_frame_.rotation_);
+}
+
 TEST_F(TestVp8Impl, DecodedQpEqualsEncodedQp) {
   SetUpEncodeDecode();
   encoder_->Encode(*input_frame_, nullptr, nullptr);