chromium/media/filters/pipeline_controller.h

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_FILTERS_PIPELINE_CONTROLLER_H_
#define MEDIA_FILTERS_PIPELINE_CONTROLLER_H_

#include <optional>

#include "base/functional/callback.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/threading/thread_checker.h"
#include "base/time/time.h"
#include "media/base/media_export.h"
#include "media/base/pipeline.h"

namespace media {

class CdmContext;
class Demuxer;

// PipelineController wraps a Pipeline to expose the one-at-a-time operations
// (Seek(), Suspend(), and Resume()) with a simpler API. Internally it tracks
// pending operations and dispatches them when possible. Duplicate requests
// (such as seeking twice to the same time) may be elided.
//
// TODO(sandersd/tguilbert):
//   - Expose an operation that replaces the Renderer (via Suspend/Resume).
//   - Expose an operation that replaces the Demuxer (via Start/Stop). This will
//     also implicitly replace the Renderer.
//   - Block invalid calls after an error occurs.
class MEDIA_EXPORT PipelineController { … };

}  // namespace media

#endif  // MEDIA_FILTERS_PIPELINE_CONTROLLER_H_