Handle SetCdm() in media::Renderer.

Changes include:
- Pass CdmContext in SetCdm().
- Move SetCdm() handling code from EncryptedMediaPlayerSupport to RendererImpl.
- Pass in SetDecryptorReadyCB at initialization time instead of construction
  time for several classes: VRI/ARI/DecoderStream/DecoderSelector.
- Prefixed EME uses the same path to SetCdm().

BUG=401264
TEST=All existing tests pass.

Review URL: https://codereview.chromium.org/748863002

Cr-Commit-Position: refs/heads/master@{#305605}

1 files changed, 25 insertions, 0 deletions

diff --git a/media/base/pipeline.cc b/media/base/pipeline.cc
index 7534688..79a50fd 100644
--- a/media/base/pipeline.cc
+++ b/media/base/pipeline.cc
@@ -44,6 +44,7 @@ Pipeline::Pipeline(
       renderer_ended_(false),
       text_renderer_ended_(false),
       demuxer_(NULL),
+      pending_cdm_context_(nullptr),
       weak_factory_(this) {
   media_log_->AddEvent(media_log_->CreatePipelineStateChangedEvent(kCreated));
   media_log_->AddEvent(
@@ -191,6 +192,13 @@ PipelineStatistics Pipeline::GetStatistics() const {
   return statistics_;
 }
 
+void Pipeline::SetCdm(CdmContext* cdm_context,
+                      const CdmAttachedCB& cdm_attached_cb) {
+  task_runner_->PostTask(
+      FROM_HERE, base::Bind(&Pipeline::SetCdmTask, weak_factory_.GetWeakPtr(),
+                            cdm_context, cdm_attached_cb));
+}
+
 void Pipeline::SetErrorForTesting(PipelineStatus status) {
   OnError(status);
 }
@@ -496,6 +504,12 @@ void Pipeline::StartTask() {
         base::Bind(&Pipeline::OnTextRendererEnded, weak_factory_.GetWeakPtr()));
   }
 
+  // Set CDM early to avoid unnecessary delay in Renderer::Initialize().
+  if (pending_cdm_context_) {
+    renderer_->SetCdm(pending_cdm_context_, base::Bind(&IgnoreCdmAttached));
+    pending_cdm_context_ = nullptr;
+  }
+
   StateTransitionTask(PIPELINE_OK);
 }
 
@@ -602,6 +616,17 @@ void Pipeline::SeekTask(TimeDelta time, const PipelineStatusCB& seek_cb) {
          base::Bind(&Pipeline::OnStateTransition, weak_factory_.GetWeakPtr()));
 }
 
+void Pipeline::SetCdmTask(CdmContext* cdm_context,
+                          const CdmAttachedCB& cdm_attached_cb) {
+  if (!renderer_) {
+    pending_cdm_context_ = cdm_context;
+    cdm_attached_cb.Run(true);
+    return;
+  }
+
+  renderer_->SetCdm(cdm_context, cdm_attached_cb);
+}
+
 void Pipeline::OnRendererEnded() {
   DCHECK(task_runner_->BelongsToCurrentThread());
   media_log_->AddEvent(media_log_->CreateEvent(MediaLogEvent::ENDED));