[Chromecast] Add CmaMediaRendererFactory and IPC proxy components

chromecast/renderer/media/media_pipeline_proxy.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 "chromecast/renderer/media/media_pipeline_proxy.h"
+
+#include "base/bind.h"
+#include "base/callback_helpers.h"
+#include "base/location.h"
+#include "base/logging.h"
+#include "base/message_loop/message_loop_proxy.h"
+#include "chromecast/common/media/cma_messages.h"
+#include "chromecast/media/cma/base/coded_frame_provider.h"
+#include "chromecast/renderer/media/audio_pipeline_proxy.h"
+#include "chromecast/renderer/media/media_channel_proxy.h"
+#include "chromecast/renderer/media/video_pipeline_proxy.h"
+
+namespace chromecast {
+namespace media {
+
+// A macro runs current member function on |io_message_loop_proxy_| thread.

[gunsch, 2014/12/21 22:17:22]

note: this should probably be moved back to after MediaPipelineProxyInternal,
where it was before (this file and others).

Since it can only be used after it's #defined, that prevents
MediaPipelineProxyInternal from inadvertently trying to use it.

[erickung1, 2014/12/22 01:41:37]

Done.

+#define FORWARD_ON_IO_THREAD(param_fn, ...) \
+  io_message_loop_proxy_->PostTask( \
+      FROM_HERE, \
+      base::Bind(&MediaPipelineProxyInternal::param_fn, \
+                 base::Unretained(proxy_.get()), ##__VA_ARGS__))
+
+// MediaPipelineProxyInternal -
+// This class is not thread safe and should run on the same thread
+// as the media channel proxy.
+class MediaPipelineProxyInternal {
+ public:
+  static void Release(scoped_ptr<MediaPipelineProxyInternal> proxy);
+
+  explicit MediaPipelineProxyInternal(
+      scoped_refptr<MediaChannelProxy> media_channel_proxy);
+  virtual ~MediaPipelineProxyInternal();
+
+  void SetClient(const MediaPipelineClient& client);
+  void SetCdm(int render_frame_id, int cdm_id);
+  void StartPlayingFrom(const base::TimeDelta& time);
+  void Flush(const ::media::PipelineStatusCB& status_cb);
+  void Stop();
+  void SetPlaybackRate(float playback_rate);
+
+ private:
+  void Shutdown();
+
+  // Callbacks for CmaMessageFilterHost::MediaDelegate.
+  void OnStateChanged(::media::PipelineStatus status);
+
+  base::ThreadChecker thread_checker_;
+
+  scoped_refptr<MediaChannelProxy> media_channel_proxy_;
+
+  MediaPipelineClient client_;
+
+  // Store the callback for a pending state transition.
+  ::media::PipelineStatusCB status_cb_;
+
+  DISALLOW_COPY_AND_ASSIGN(MediaPipelineProxyInternal);
+};
+
+// static
+void MediaPipelineProxyInternal::Release(
+    scoped_ptr<MediaPipelineProxyInternal> proxy) {
+  proxy->Shutdown();
+}
+
+MediaPipelineProxyInternal::MediaPipelineProxyInternal(
+    scoped_refptr<MediaChannelProxy> media_channel_proxy)
+    : media_channel_proxy_(media_channel_proxy) {
+  DCHECK(media_channel_proxy.get());
+
+  // Creation can be done on a different thread.
+  thread_checker_.DetachFromThread();
+}
+
+MediaPipelineProxyInternal::~MediaPipelineProxyInternal() {
+}
+
+void MediaPipelineProxyInternal::Shutdown() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  // Remove any callback on VideoPipelineProxyInternal.
+  media_channel_proxy_->SetMediaDelegate(
+      CmaMessageFilterProxy::MediaDelegate());
+}
+
+void MediaPipelineProxyInternal::SetClient(
+    const MediaPipelineClient& client) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(!client.error_cb.is_null());
+  DCHECK(!client.buffering_state_cb.is_null());
+  client_ = client;
+
+  CmaMessageFilterProxy::MediaDelegate delegate;
+  delegate.state_changed_cb =
+      base::Bind(&MediaPipelineProxyInternal::OnStateChanged,
+                 base::Unretained(this));
+  delegate.client = client;
+  bool success = media_channel_proxy_->SetMediaDelegate(delegate);
+  CHECK(success);
+}
+
+void MediaPipelineProxyInternal::SetCdm(int render_frame_id, int cdm_id) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  bool success = media_channel_proxy_->Send(scoped_ptr<IPC::Message>(
+      new CmaHostMsg_SetCdm(media_channel_proxy_->GetId(),
+                            render_frame_id,
+                            cdm_id)));
+  LOG_IF(ERROR, !success) << "Failed to send SetCdm=" << cdm_id;
+}
+
+void MediaPipelineProxyInternal::Flush(
+    const ::media::PipelineStatusCB& status_cb) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  bool success = media_channel_proxy_->Send(scoped_ptr<IPC::Message>(
+      new CmaHostMsg_Flush(media_channel_proxy_->GetId())));
+  if (!success) {
+    status_cb.Run(::media::PIPELINE_ERROR_ABORT);
+    return;
+  }
+  DCHECK(status_cb_.is_null());
+  status_cb_ = status_cb;
+}
+
+void MediaPipelineProxyInternal::Stop() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  bool success = media_channel_proxy_->Send(scoped_ptr<IPC::Message>(
+      new CmaHostMsg_Stop(media_channel_proxy_->GetId())));
+  if (!success)
+    client_.error_cb.Run(::media::PIPELINE_ERROR_ABORT);
+}
+
+void MediaPipelineProxyInternal::StartPlayingFrom(const base::TimeDelta& time) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  bool success = media_channel_proxy_->Send(scoped_ptr<IPC::Message>(
+      new CmaHostMsg_StartPlayingFrom(
+          media_channel_proxy_->GetId(), time)));
+  if (!success)
+    client_.error_cb.Run(::media::PIPELINE_ERROR_ABORT);
+}
+
+void MediaPipelineProxyInternal::SetPlaybackRate(float playback_rate) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  media_channel_proxy_->Send(scoped_ptr<IPC::Message>(
+      new CmaHostMsg_SetPlaybackRate(
+          media_channel_proxy_->GetId(), playback_rate)));
+}
+
+void MediaPipelineProxyInternal::OnStateChanged(
+    ::media::PipelineStatus status) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(!status_cb_.is_null());
+  base::ResetAndReturn(&status_cb_).Run(status);
+}
+
+MediaPipelineProxy::MediaPipelineProxy(
+    int render_frame_id,
+    scoped_refptr<base::MessageLoopProxy> io_message_loop_proxy,
+    LoadType load_type)
+    : io_message_loop_proxy_(io_message_loop_proxy),
+      render_frame_id_(render_frame_id),
+      media_channel_proxy_(new MediaChannelProxy),
+      proxy_(new MediaPipelineProxyInternal(media_channel_proxy_)),
+      has_audio_(false),
+      has_video_(false),
+      audio_pipeline_(new AudioPipelineProxy(
+          io_message_loop_proxy, media_channel_proxy_)),
+      video_pipeline_(new VideoPipelineProxy(
+          io_message_loop_proxy, media_channel_proxy_)),
+      weak_factory_(this) {
+  weak_this_ = weak_factory_.GetWeakPtr();
+  io_message_loop_proxy_->PostTask(
+      FROM_HERE,
+      base::Bind(&MediaChannelProxy::Open, media_channel_proxy_,
+                 load_type));
+  thread_checker_.DetachFromThread();
+}
+
+MediaPipelineProxy::~MediaPipelineProxy() {
+  io_message_loop_proxy_->PostTask(
+      FROM_HERE,
+      base::Bind(&MediaPipelineProxyInternal::Release, base::Passed(&proxy_)));
+  io_message_loop_proxy_->PostTask(
+      FROM_HERE,
+      base::Bind(&MediaChannelProxy::Close, media_channel_proxy_));
+}
+
+void MediaPipelineProxy::SetClient(
+    const MediaPipelineClient& client) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  FORWARD_ON_IO_THREAD(SetClient, client);
+}
+
+void MediaPipelineProxy::SetCdm(int cdm_id) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  FORWARD_ON_IO_THREAD(SetCdm, render_frame_id_, cdm_id);
+}
+
+AudioPipeline* MediaPipelineProxy::GetAudioPipeline() const {
+  return audio_pipeline_.get();
+}
+
+VideoPipeline* MediaPipelineProxy::GetVideoPipeline() const {
+  return video_pipeline_.get();
+}
+
+void MediaPipelineProxy::InitializeAudio(
+    const ::media::AudioDecoderConfig& config,
+    scoped_ptr<CodedFrameProvider> frame_provider,
+    const ::media::PipelineStatusCB& status_cb) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  has_audio_ = true;
+  audio_pipeline_->Initialize(config, frame_provider.Pass(), status_cb);
+}
+
+void MediaPipelineProxy::InitializeVideo(
+    const ::media::VideoDecoderConfig& config,
+    scoped_ptr<CodedFrameProvider> frame_provider,
+    const ::media::PipelineStatusCB& status_cb) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  has_video_ = true;
+  video_pipeline_->Initialize(config, frame_provider.Pass(), status_cb);
+}
+
+void MediaPipelineProxy::StartPlayingFrom(base::TimeDelta time) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (has_audio_)
+    audio_pipeline_->StartFeeding();
+  if (has_video_)
+    video_pipeline_->StartFeeding();
+  FORWARD_ON_IO_THREAD(StartPlayingFrom, time);
+}
+
+void MediaPipelineProxy::Flush(const ::media::PipelineStatusCB& status_cb) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(has_audio_ || has_video_);
+
+  ::media::SerialRunner::Queue bound_fns;
+  if (has_audio_) {
+    bound_fns.Push(base::Bind(&AudioPipelineProxy::Flush,
+                              base::Unretained(audio_pipeline_.get())));
+  }
+  if (has_video_) {
+    bound_fns.Push(base::Bind(&VideoPipelineProxy::Flush,
+                              base::Unretained(video_pipeline_.get())));
+  }
+  ::media::PipelineStatusCB cb =
+      base::Bind(&MediaPipelineProxy::OnProxyFlushDone, weak_this_, status_cb);
+  pending_callbacks_ = ::media::SerialRunner::Run(bound_fns, cb);
+}
+
+void MediaPipelineProxy::OnProxyFlushDone(
+    const ::media::PipelineStatusCB& status_cb,
+    ::media::PipelineStatus status) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK_EQ(status, ::media::PIPELINE_OK);
+  pending_callbacks_.reset();
+  FORWARD_ON_IO_THREAD(Flush, status_cb);
+}
+
+void MediaPipelineProxy::Stop() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(has_audio_ || has_video_);
+
+  if (has_audio_)
+    audio_pipeline_->Stop();
+  if (has_video_)
+    video_pipeline_->Stop();
+
+  FORWARD_ON_IO_THREAD(Stop);
+}
+
+void MediaPipelineProxy::SetPlaybackRate(float playback_rate) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  FORWARD_ON_IO_THREAD(SetPlaybackRate, playback_rate);
+}
+
+}  // namespace cma
+}  // namespace chromecast