Cast: Plumb raw event logs to cast extension, install EncodingEventSubscriber on CastSessionDelegat…

chrome/renderer/media/cast_session_delegate.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 "chrome/renderer/media/cast_session_delegate.h"
 
 #include "base/logging.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "chrome/renderer/media/cast_transport_sender_ipc.h"
 #include "content/public/renderer/p2p_socket_client.h"
 #include "content/public/renderer/render_thread.h"
 #include "media/cast/cast_config.h"
 #include "media/cast/cast_environment.h"
 #include "media/cast/cast_sender.h"
+#include "media/cast/logging/encoding_event_subscriber.h"
 #include "media/cast/logging/logging_defines.h"
 #include "media/cast/transport/cast_transport_config.h"
 #include "media/cast/transport/cast_transport_sender.h"
 
 using media::cast::AudioSenderConfig;
 using media::cast::CastEnvironment;
 using media::cast::CastSender;
 using media::cast::VideoSenderConfig;
 
+namespace {
+
+// Allow about 9MB for video event logs. Assume serialized log data for
+// each frame will take up to 150 bytes.
+const int kMaxVideoEventEntries = 9000000 / 150;
+
+// Allow about 9MB for audio event logs. Assume serialized log data for
+// each frame will take up to 75 bytes.
+const int kMaxAudioEventEntries = 9000000 / 75;
+
+}  // namespace
+
 CastSessionDelegate::CastSessionDelegate()
     : audio_encode_thread_("CastAudioEncodeThread"),
       video_encode_thread_("CastVideoEncodeThread"),
       transport_configured_(false),
       io_message_loop_proxy_(
           content::RenderThread::Get()->GetIOMessageLoopProxy()) {
   DCHECK(io_message_loop_proxy_);
 }
 
 CastSessionDelegate::~CastSessionDelegate() {
   DCHECK(io_message_loop_proxy_->BelongsToCurrentThread());
+
+  if (audio_event_subscriber_.get()) {
+    cast_environment_->Logging()->RemoveRawEventSubscriber(
+        audio_event_subscriber_.get());
+  }
+  if (video_event_subscriber_.get()) {
+    cast_environment_->Logging()->RemoveRawEventSubscriber(
+        video_event_subscriber_.get());
+  }
 }
 
 void CastSessionDelegate::Initialize() {
   if (cast_environment_)
     return;  // Already initialized.
 
   audio_encode_thread_.Start();
   video_encode_thread_.Start();
 
   // CastSender uses the renderer's IO thread as the main thread. This reduces
@@ skipping 34 matching lines @@
 void CastSessionDelegate::StartUDP(
     const net::IPEndPoint& local_endpoint,
     const net::IPEndPoint& remote_endpoint) {
   DCHECK(io_message_loop_proxy_->BelongsToCurrentThread());
   transport_configured_ = true;
   local_endpoint_ = local_endpoint;
   remote_endpoint_ = remote_endpoint;
   StartSendingInternal();
 }
 
+void CastSessionDelegate::GetEventLogsAndReset(
+    const EventLogsCallback& callback) {
+  if (!cast_sender_.get())
+    return;
+
+  // TODO(imcheng): Get data from event subscribers.
+  scoped_ptr<std::string> result(new std::string);
+  callback.Run(result.Pass());
+}
+
 void CastSessionDelegate::StatusNotificationCB(
     media::cast::transport::CastTransportStatus unused_status) {
   DCHECK(io_message_loop_proxy_->BelongsToCurrentThread());
   // TODO(hubbe): Call javascript UDPTransport error function.
 }
 
 void CastSessionDelegate::StartSendingInternal() {
   DCHECK(io_message_loop_proxy_->BelongsToCurrentThread());
 
   // No transport, wait.
@@ skipping 10 matching lines @@
 
   // TODO(hubbe): set config.aes_key and config.aes_iv_mask.
   config.local_endpoint = local_endpoint_;
   config.receiver_endpoint = remote_endpoint_;
   if (audio_config_) {
     config.audio_ssrc = audio_config_->sender_ssrc;
     config.audio_codec = audio_config_->codec;
     config.audio_rtp_config = audio_config_->rtp_config;
     config.audio_frequency = audio_config_->frequency;
     config.audio_channels = audio_config_->channels;
+    audio_event_subscriber_.reset(new media::cast::EncodingEventSubscriber(
+        media::cast::AUDIO_EVENT, kMaxAudioEventEntries));
+
+    // Currently on main thread, can call logging directly.

[Alpha Left Google, 2014/02/21 01:59:19]

This comment is not necessary.

[imcheng, 2014/02/21 03:17:25]

I suppose... it helps to remind me this is making an assumption here since I am
still kind of new to this code. 

+    cast_environment_->Logging()->AddRawEventSubscriber(
+        audio_event_subscriber_.get());
   }
   if (video_config_) {
     config.video_ssrc = video_config_->sender_ssrc;
     config.video_codec = video_config_->codec;
     config.video_rtp_config = video_config_->rtp_config;
+
+    video_event_subscriber_.reset(new media::cast::EncodingEventSubscriber(
+        media::cast::VIDEO_EVENT, kMaxVideoEventEntries));
+
+    // Currently on main thread, can call logging directly.

[Alpha Left Google, 2014/02/21 01:59:19]

This comment is not necessary.

[imcheng, 2014/02/21 03:17:25]

Done.

[imcheng, 2014/02/21 03:17:25]

Done.

+    cast_environment_->Logging()->AddRawEventSubscriber(
+        video_event_subscriber_.get());
   }
 
   cast_transport_.reset(new CastTransportSenderIPC(
       config,
       base::Bind(&CastSessionDelegate::StatusNotificationCB,
                  base::Unretained(this))));
 
   cast_sender_.reset(CastSender::CreateCastSender(
       cast_environment_,
       audio_config_.get(),
@@ skipping 12 matching lines @@
   // TODO(pwestin): handle the error codes.
   if (result == media::cast::STATUS_INITIALIZED) {
     if (!audio_frame_input_available_callback_.is_null()) {
       audio_frame_input_available_callback_.Run(cast_sender_->frame_input());
     }
     if (!video_frame_input_available_callback_.is_null()) {
       video_frame_input_available_callback_.Run(cast_sender_->frame_input());
     }
   }
 }