Add VP9 decode support to the remoting client.

remoting/codec/video_decoder_vpx.cc

 // Copyright 2013 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 "remoting/codec/video_decoder_vpx.h"
 
 #include <math.h>
 
 #include <algorithm>
 
@@ skipping 43 matching lines @@
   vpx_codec_err_t ret =
       vpx_codec_dec_init(codec.get(), vpx_codec_vp8_dx(), &config, 0);
   if (ret != VPX_CODEC_OK) {
     LOG(INFO) << "Cannot initialize codec.";
     return scoped_ptr<VideoDecoderVpx>();
   }
 
   return scoped_ptr<VideoDecoderVpx>(new VideoDecoderVpx(codec.Pass()));
 }
 
+// static
+scoped_ptr<VideoDecoderVpx> VideoDecoderVpx::CreateForVP9() {
+  ScopedVpxCodec codec(new vpx_codec_ctx_t);
+
+  // TODO(hclam): Scale the number of threads with number of cores of the
+  // machine.
+  vpx_codec_dec_cfg config;
+  config.w = 0;
+  config.h = 0;
+  config.threads = 2;
+  vpx_codec_err_t ret =
+      vpx_codec_dec_init(codec.get(), vpx_codec_vp9_dx(), &config, 0);
+  if (ret != VPX_CODEC_OK) {
+    LOG(INFO) << "Cannot initialize codec.";
+    return scoped_ptr<VideoDecoderVpx>();
+  }
+
+  return scoped_ptr<VideoDecoderVpx>(new VideoDecoderVpx(codec.Pass()));
+}
+
 VideoDecoderVpx::~VideoDecoderVpx() {}
 
 void VideoDecoderVpx::Initialize(const webrtc::DesktopSize& screen_size) {
   DCHECK(!screen_size.is_empty());
 
   screen_size_ = screen_size;
 
   transparent_region_.SetRect(webrtc::DesktopRect::MakeSize(screen_size_));
 }
 
@@ skipping 206 matching lines @@
   webrtc::DesktopRegion difference = *new_desktop_shape;
   difference.Subtract(desktop_shape_);
   updated_region_.AddRegion(difference);
   updated_region_.IntersectWith(*new_desktop_shape);
 
   // Set the new desktop shape region.
   desktop_shape_.Swap(new_desktop_shape);
 }
 
 }  // namespace remoting