64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
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/*
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* Copyright 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef API_MEDIA_STREAM_TRACK_H_
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#define API_MEDIA_STREAM_TRACK_H_
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#include <string>
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#include "api/media_stream_interface.h"
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#include "api/notifier.h"
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namespace webrtc {
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// MediaTrack implements the interface common to AudioTrackInterface and
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// VideoTrackInterface.
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template <typename T>
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class MediaStreamTrack : public Notifier<T> {
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public:
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typedef typename T::TrackState TypedTrackState;
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std::string id() const override { return id_; }
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MediaStreamTrackInterface::TrackState state() const override {
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return state_;
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}
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bool enabled() const override { return enabled_; }
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bool set_enabled(bool enable) override {
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bool fire_on_change = (enable != enabled_);
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enabled_ = enable;
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if (fire_on_change) {
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Notifier<T>::FireOnChanged();
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}
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return fire_on_change;
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}
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void set_ended() { set_state(MediaStreamTrackInterface::TrackState::kEnded); }
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protected:
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explicit MediaStreamTrack(const std::string& id)
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: enabled_(true), id_(id), state_(MediaStreamTrackInterface::kLive) {}
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bool set_state(MediaStreamTrackInterface::TrackState new_state) {
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bool fire_on_change = (state_ != new_state);
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state_ = new_state;
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if (fire_on_change)
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Notifier<T>::FireOnChanged();
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return true;
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}
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private:
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bool enabled_;
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const std::string id_;
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MediaStreamTrackInterface::TrackState state_;
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};
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} // namespace webrtc
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#endif // API_MEDIA_STREAM_TRACK_H_
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