media/vpx: Add support for VP9 alpha channel

media/test/pipeline_integration_test.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 <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <utility>
 
@@ skipping 2180 matching lines @@
   EXPECT_VIDEO_FORMAT_EQ(last_video_frame_format_, PIXEL_FORMAT_YV12A);
 }
 
 // Verify that VP9 video with odd width/height can be played back.
 TEST_F(PipelineIntegrationTest, BasicPlayback_VP9_Odd_WebM) {
   ASSERT_EQ(PIPELINE_OK, Start("bear-vp9-odd-dimensions.webm"));
   Play();
   ASSERT_TRUE(WaitUntilOnEnded());
 }
 
+// Verify that VP9 video with alpha channel can be played back.
+TEST_F(PipelineIntegrationTest, BasicPlayback_VP9A_WebM) {
+  ASSERT_EQ(PIPELINE_OK, Start("bear-vp9a.webm"));
+  Play();
+  ASSERT_TRUE(WaitUntilOnEnded());
+  EXPECT_VIDEO_FORMAT_EQ(last_video_frame_format_, PIXEL_FORMAT_YV12A);
+}
+
+// Verify that VP9A video with odd width/height can be played back.
+TEST_F(PipelineIntegrationTest, BasicPlayback_VP9A_Odd_WebM) {
+  ASSERT_EQ(PIPELINE_OK, Start("bear-vp9a-odd-dimensions.webm"));
+  Play();
+  ASSERT_TRUE(WaitUntilOnEnded());
+  EXPECT_VIDEO_FORMAT_EQ(last_video_frame_format_, PIXEL_FORMAT_YV12A);
+}
+
 // Verify that VP8 video with inband text track can be played back.
 TEST_F(PipelineIntegrationTest, MAYBE_TEXT(BasicPlayback_VP8_WebVTT_WebM)) {
   EXPECT_CALL(*this, OnAddTextTrack(_, _));
   ASSERT_EQ(PIPELINE_OK, Start("bear-vp8-webvtt.webm"));
   Play();
   ASSERT_TRUE(WaitUntilOnEnded());
 }
 
 // Verify that VP9 video with 4:4:4 subsampling can be played back.
 TEST_F(PipelineIntegrationTest, P444_VP9_WebM) {
@@ skipping 92 matching lines @@
 
 TEST_F(PipelineIntegrationTest, BasicPlaybackPositiveStartTime) {
   ASSERT_EQ(PIPELINE_OK, Start("nonzero-start-time.webm"));
   Play();
   ASSERT_TRUE(WaitUntilOnEnded());
   ASSERT_EQ(base::TimeDelta::FromMicroseconds(396000),
             demuxer_->GetStartTime());
 }
 
 }  // namespace media