Mojify demuxers and allow running {Chunk/FFmpeg}Demuxer in a Utility Process

media/mojo/services/mojo_demuxer_service_context.cc

+// Copyright 2017 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/mojo/services/mojo_demuxer_service_context.h"
+
+#include "media/base/demuxer.h"
+#include "media/mojo/services/mojo_demuxer_service.h"
+
+namespace media {
+
+MojoDemuxerServiceContext::MojoDemuxerServiceContext()
+    : weak_ptr_factory_(this) {}
+
+MojoDemuxerServiceContext::~MojoDemuxerServiceContext() {}
+
+base::WeakPtr<MojoDemuxerServiceContext>
+MojoDemuxerServiceContext::GetWeakPtr() {
+  return weak_ptr_factory_.GetWeakPtr();
+}
+
+void MojoDemuxerServiceContext::RegisterDemuxer(
+    int demuxer_id,
+    MojoDemuxerService* demuxer_service) {
+  DCHECK(!demuxer_services_.count(demuxer_id));
+  DCHECK(demuxer_service);
+  demuxer_services_[demuxer_id] = demuxer_service;
+}
+
+void MojoDemuxerServiceContext::UnregisterDemuxer(int demuxer_id) {
+  DCHECK(demuxer_services_.count(demuxer_id));
+  demuxer_services_.erase(demuxer_id);
+}
+
+Demuxer* MojoDemuxerServiceContext::GetDemuxer(
+    int demuxer_id,
+    const PipelineStatusCB& demuxer_init_cb) {
+  auto demuxer_service = demuxer_services_.find(demuxer_id);
+  if (demuxer_service == demuxer_services_.end()) {
+    LOG(ERROR) << "Demuxer service not found: " << demuxer_id;
+    return nullptr;
+  }
+
+  return demuxer_service->second->GetDemuxer(demuxer_init_cb);
+}
+
+media::Demuxer* MojoDemuxerServiceContext::GetDemuxerSourceBuffer(
+    int demuxer_id,
+    media::SourceBuffer** source_buffer_out) {
+  auto demuxer_service = demuxer_services_.find(demuxer_id);
+  if (demuxer_service == demuxer_services_.end()) {
+    LOG(ERROR) << "Demuxer service not found: " << demuxer_id;
+    return nullptr;
+  }
+
+  return demuxer_service->second->GetDemuxerSourceBuffer(source_buffer_out);
+}
+
+}  // namespace media