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96 lines
2.3 KiB
C++
96 lines
2.3 KiB
C++
/**
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* @file
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* @brief Header file for PlayerBase class
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* @author Jonathan Thomas <jonathan@openshot.org>
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*
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* @ref License
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*/
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// Copyright (c) 2008-2019 OpenShot Studios, LLC
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//
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// SPDX-License-Identifier: LGPL-3.0-or-later
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#ifndef OPENSHOT_PLAYER_BASE_H
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#define OPENSHOT_PLAYER_BASE_H
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#include <iostream>
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#include "ReaderBase.h"
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namespace openshot
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{
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/**
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* @brief This enumeration determines the mode of the video player (i.e. playing, paused, etc...)
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*
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* A player can be in one of the following modes, which controls how it behaves.
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*/
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enum PlaybackMode
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{
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PLAYBACK_PLAY, ///< Play the video normally
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PLAYBACK_PAUSED, ///< Pause the video (holding the last displayed frame)
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PLAYBACK_LOADING, ///< Loading the video (display a loading animation)
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PLAYBACK_STOPPED, ///< Stop playing the video (clear cache, done with player)
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};
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/**
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* @brief This is the base class of all Players in libopenshot.
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*
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* Players are responsible for displaying images and playing back audio samples with specific
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* frame rates and sample rates. All Players must be based on this class, and include these
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* methods.
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*/
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class PlayerBase
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{
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protected:
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float speed;
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float volume;
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openshot::ReaderBase *reader;
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PlaybackMode mode;
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public:
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/// Display a loading animation
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virtual void Loading() = 0;
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/// Get the current mode
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virtual PlaybackMode Mode() = 0;
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/// Play the video
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virtual void Play() = 0;
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/// Pause the video
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virtual void Pause() = 0;
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/// Get the current frame number being played
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virtual int64_t Position() = 0;
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/// Seek to a specific frame in the player
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virtual void Seek(int64_t new_frame) = 0;
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/// Get the Playback speed
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virtual float Speed() = 0;
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/// Set the Playback speed (1.0 = normal speed, <1.0 = slower, >1.0 faster)
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virtual void Speed(float new_speed) = 0;
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/// Stop the video player and clear the cached frames
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virtual void Stop() = 0;
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/// Get the current reader, such as a FFmpegReader
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virtual openshot::ReaderBase* Reader() = 0;
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/// Set the current reader, such as a FFmpegReader
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virtual void Reader(openshot::ReaderBase *new_reader) = 0;
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/// Get the Volume
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virtual float Volume() = 0;
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/// Set the Volume (1.0 = normal volume, <1.0 = quieter, >1.0 louder)
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virtual void Volume(float new_volume) = 0;
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virtual ~PlayerBase() = default;
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};
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}
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#endif
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