Implement out-of-band video compositing on Android: Step 1

webkit/media/android/webmediaplayer_android.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 "webkit/media/android/webmediaplayer_android.h"
 
+#include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "media/base/android/media_player_bridge.h"
 #include "media/base/video_frame.h"
 #include "net/base/mime_util.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebMediaPlayerClient.h"
 #include "webkit/media/android/stream_texture_factory_android.h"
 #include "webkit/media/android/webmediaplayer_manager_android.h"
+#include "webkit/media/media_switches.h"
 #include "webkit/media/webmediaplayer_util.h"
 #include "webkit/media/webvideoframe_impl.h"
 
 static const uint32 kGLTextureExternalOES = 0x8D65;
 
 using WebKit::WebMediaPlayer;
 using WebKit::WebMediaSource;
 using WebKit::WebSize;
 using WebKit::WebTimeRanges;
 using WebKit::WebURL;
@@ skipping 12 matching lines @@
       main_loop_(MessageLoop::current()),
       pending_seek_(0),
       seeking_(false),
       did_loading_progress_(false),
       manager_(manager),
       network_state_(WebMediaPlayer::NetworkStateEmpty),
       ready_state_(WebMediaPlayer::ReadyStateHaveNothing),
       is_playing_(false),
       needs_establish_peer_(true),
       has_size_info_(false),
-      stream_texture_factory_(factory) {
+      stream_texture_factory_(factory),
+      needs_external_surface_(false) {
   main_loop_->AddDestructionObserver(this);
   if (manager_)
     player_id_ = manager_->RegisterMediaPlayer(this);
 
-  if (stream_texture_factory_.get()) {
+  if (CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kUseExternalVideoSurface)) {
+    needs_external_surface_ = true;
+    SetNeedsEstablishPeer(false);
+    ReallocateVideoFrame();
+  } else if (stream_texture_factory_.get()) {
     stream_texture_proxy_.reset(stream_texture_factory_->CreateProxy());
     stream_id_ = stream_texture_factory_->CreateStreamTexture(&texture_id_);
     ReallocateVideoFrame();
   }
 }
 
 WebMediaPlayerAndroid::~WebMediaPlayerAndroid() {
   if (stream_id_)
     stream_texture_factory_->DestroyStreamTexture(texture_id_);
 
@@ skipping 17 matching lines @@
                                  WebMediaSource* media_source,
                                  CORSMode cors_mode) {
   NOTIMPLEMENTED();
 }
 
 void WebMediaPlayerAndroid::cancelLoad() {
   NOTIMPLEMENTED();
 }
 
 void WebMediaPlayerAndroid::play() {
+  if (hasVideo() && needs_external_surface_) {
+    DCHECK(!needs_establish_peer_);
+    RequestExternalSurface();
+  }
   if (hasVideo() && needs_establish_peer_)
     EstablishSurfaceTexturePeer();
 
   PlayInternal();
   is_playing_ = true;
 }
 
 void WebMediaPlayerAndroid::pause() {
   PauseInternal();
   is_playing_ = false;
@@ skipping 294 matching lines @@
     stream_texture_factory_->DestroyStreamTexture(texture_id_);
     stream_id_ = 0;
   }
 
   web_video_frame_.reset();
 
   manager_ = NULL;
 }
 
 void WebMediaPlayerAndroid::ReallocateVideoFrame() {
-  if (texture_id_) {
+  if (needs_external_surface_) {
+    // VideoFrame::CreateHoleFrame is only defined under GOOGLE_TV.
+#if defined(GOOGLE_TV)
+    if (!natural_size_.isEmpty()) {
+      web_video_frame_.reset(new WebVideoFrameImpl(VideoFrame::CreateHoleFrame(
+          natural_size_)));
+    }
+#else
+    NOTIMPLEMENTED() << "Hole punching not supported outside of Google TV";
+#endif
+  } else if (texture_id_) {
     web_video_frame_.reset(new WebVideoFrameImpl(VideoFrame::WrapNativeTexture(
         texture_id_, kGLTextureExternalOES, natural_size_,
         gfx::Rect(natural_size_), natural_size_, base::TimeDelta(),
         VideoFrame::ReadPixelsCB(),
         base::Closure())));
   }
 }
 
 WebVideoFrame* WebMediaPlayerAndroid::getCurrentFrame() {
   if (stream_texture_proxy_.get() && !stream_texture_proxy_->IsInitialized()
-      && stream_id_) {
+      && stream_id_ && !needs_external_surface_) {
     gfx::Size natural_size = web_video_frame_->video_frame->natural_size();
     stream_texture_proxy_->Initialize(
         stream_id_, natural_size.width(), natural_size.height());
   }
 
   return web_video_frame_.get();
 }
 
 void WebMediaPlayerAndroid::putCurrentFrame(
     WebVideoFrame* web_video_frame) {
@@ skipping 13 matching lines @@
 
 void WebMediaPlayerAndroid::SetNeedsEstablishPeer(bool needs_establish_peer) {
   needs_establish_peer_ = needs_establish_peer;
 }
 
 void WebMediaPlayerAndroid::UpdatePlayingState(bool is_playing) {
   is_playing_ = is_playing;
 }
 
 }  // namespace webkit_media