src/media/playback/mediaplayer/core/sink_segment.h

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SRC_MEDIA_PLAYBACK_MEDIAPLAYER_CORE_SINK_SEGMENT_H_
#define SRC_MEDIA_PLAYBACK_MEDIAPLAYER_CORE_SINK_SEGMENT_H_

#include <lib/fit/function.h>

#include "lib/media/cpp/timeline_function.h"
#include "src/media/playback/mediaplayer/core/segment.h"
#include "src/media/playback/mediaplayer/graph/graph.h"
#include "src/media/playback/mediaplayer/graph/result.h"
#include "src/media/playback/mediaplayer/graph/types/stream_type.h"

namespace media_player {

// A graph segment that delivers an elementary stream to one or more
// destinations.
//
// Note that the update callback supplied in Segment::Provision is used to
// notify of changes to the value returned by end_of_stream().
class SinkSegment : public Segment {
 public:
  using ConnectCallback = ::fit::function<void(Result)>;

  SinkSegment();

  ~SinkSegment() override;

  // Connects (or reconnects) this sink segment to the specified output and
  // sets the stream type. After the callback is called, success can be
  // determined by calling |connected|.
  virtual void Connect(const StreamType& type, OutputRef output, ConnectCallback callback) = 0;

  // Disconnects this sink segment.
  virtual void Disconnect() = 0;

  // Indicates whether the segment is connected.
  virtual bool connected() const = 0;

  // Prepares the sink segment for playback by satisfying initial renderer
  // demand.
  virtual void Prime(fit::closure callback) = 0;

  // Sets the timeline function.
  virtual void SetTimelineFunction(media::TimelineFunction timeline_function,
                                   fit::closure callback) = 0;

  // Sets a program range for this sink segment.
  virtual void SetProgramRange(uint64_t program, int64_t min_pts, int64_t max_pts) = 0;

  // Indicates whether this sink segment has reached end of stream.
  virtual bool end_of_stream() const = 0;
};

}  // namespace media_player

#endif  // SRC_MEDIA_PLAYBACK_MEDIAPLAYER_CORE_SINK_SEGMENT_H_