blob: cd248d77edc26872e426c5c2a42ef54a2aac1e0a [file] [log] [blame]
// Copyright 2015 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 "base/macros.h"
namespace chromecast {
// Interface for resources needed to run application.
class CastResource {
// Resources necessary to run cast apps. CastResource may contain union of the
// following types.
// TODO(yucliu): Split video resources and graphic resources.
enum Resource {
kResourceNone = 0,
// All resources necessary to render sounds, for example, audio pipeline,
// speaker, etc.
kResourceAudio = 1 << 0,
// All resources necessary to render videos or images, for example, video
// pipeline, primary graphics plane, display, etc.
kResourceScreenPrimary = 1 << 1,
// All resources necessary to render overlaid images, for example, secondary
// graphics plane, LCD, etc.
kResourceScreenSecondary = 1 << 2,
// Collection of resources used for display only combined with bitwise or.
kResourceDisplayOnly = (kResourceScreenPrimary | kResourceScreenSecondary),
// Collection of all resources combined with bitwise or.
kResourceAll =
(kResourceAudio | kResourceScreenPrimary | kResourceScreenSecondary),
class Client {
// Called when resource is created. CastResource should not be owned by
// Client. It can be called from any thread.
virtual void OnResourceAcquired(CastResource* cast_resource) = 0;
// Called when part or all resources are released. It can be called from any
// thread.
// |cast_resource| the CastResource that is released. The pointer may be
// invalid. Client can't call functions with that pointer.
// |remain| the unreleased resource of CastResource. If kResourceNone is
// returned, Client will remove the resource from its watching
// list.
virtual void OnResourceReleased(CastResource* cast_resource,
Resource remain) = 0;
virtual ~Client() {}
void SetCastResourceClient(Client* client);
// Called to release resources. Implementation should call
// Client::OnResourceReleased when resource is released on its side.
virtual void ReleaseResource(Resource resource) = 0;
CastResource() : client_(nullptr) {}
virtual ~CastResource() {}
void NotifyResourceAcquired();
void NotifyResourceReleased(Resource remain);
Client* client_;
} // namespace chromecast