src/chrome/renderer/media/cast_session_delegate.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/renderer/media/cast_session_delegate.h"
   6
   7 #include "base/logging.h"
   8 #include "base/message_loop/message_loop_proxy.h"
   9 #include "content/public/renderer/render_thread.h"
  10 #include "media/cast/cast_config.h"
  11 #include "media/cast/cast_environment.h"
  12 #include "media/cast/cast_sender.h"
  13
  14 using media::cast::AudioSenderConfig;
  15 using media::cast::CastEnvironment;
  16 using media::cast::CastSender;
  17 using media::cast::VideoSenderConfig;
  18
  19 CastSessionDelegate::CastSessionDelegate()
  20     : audio_encode_thread_("CastAudioEncodeThread"),
  21       video_encode_thread_("CastVideoEncodeThread"),
  22       io_message_loop_proxy_(
  23           content::RenderThread::Get()->GetIOMessageLoopProxy()) {
  24 }
  25
  26 CastSessionDelegate::~CastSessionDelegate() {
  27   DCHECK(io_message_loop_proxy_->BelongsToCurrentThread());
  28 }
  29
  30 void CastSessionDelegate::PrepareForSending() {
  31   DCHECK(base::MessageLoopProxy::current() == io_message_loop_proxy_);
  32
  33   if (cast_environment_)
  34     return;
  35
  36   audio_encode_thread_.Start();
  37   video_encode_thread_.Start();
  38
  39   // CastSender uses the renderer's IO thread as the main thread. This reduces
  40   // thread hopping for incoming video frames and outgoing network packets.
  41   // There's no need to decode so no thread assigned for decoding.
  42   cast_environment_ = new CastEnvironment(
  43       &clock_,
  44       base::MessageLoopProxy::current(),
  45       audio_encode_thread_.message_loop_proxy(),
  46       NULL,
  47       video_encode_thread_.message_loop_proxy(),
  48       NULL);
  49
  50   // TODO(hclam): A couple things need to be done here:
  51   // 1. Pass audio and video configuration to CastSender.
  52   // 2. Connect media::cast::PacketSender to net::Socket interface.
  53   // 3. Implement VideoEncoderController to configure hardware encoder.
  54   cast_sender_.reset(CastSender::CreateCastSender(
  55       cast_environment_,
  56       AudioSenderConfig(),
  57       VideoSenderConfig(),
  58       NULL,
  59       NULL));
  60 }