VideoToolbox encoder for cast senders.

media/cast/sender/video_encoder_impl.cc

 // Copyright 2014 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 "media/cast/sender/video_encoder_impl.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/logging.h"
@@ skipping 55 matching lines @@
       base::Bind(
           frame_encoded_callback, base::Passed(&encoded_frame)));
 }
 }  // namespace
 
 VideoEncoderImpl::VideoEncoderImpl(
     scoped_refptr<CastEnvironment> cast_environment,
     const VideoSenderConfig& video_config,
     int max_unacked_frames)
     : cast_environment_(cast_environment) {
+  CHECK(cast_environment_->HasVideoThread());
   if (video_config.codec == CODEC_VIDEO_VP8) {
 #if !defined(MEDIA_DISABLE_LIBVPX)
     encoder_.reset(new Vp8Encoder(video_config, max_unacked_frames));
     cast_environment_->PostTask(CastEnvironment::VIDEO,
                                 FROM_HERE,
                                 base::Bind(&InitializeEncoderOnEncoderThread,
                                            cast_environment,
                                            encoder_.get()));
 #endif  // !defined(MEDIA_DISABLE_LIBVPX)
 #ifndef OFFICIAL_BUILD
@@ skipping 49 matching lines @@
   dynamic_config_.key_frame_requested = true;
 }
 
 // Inform the encoder to only reference frames older or equal to frame_id;
 void VideoEncoderImpl::LatestFrameIdToReference(uint32 frame_id) {
   dynamic_config_.latest_frame_id_to_reference = frame_id;
 }
 
 }  //  namespace cast
 }  //  namespace media