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/**
* @file
* @brief Header file for PlayerBase class
* @author Jonathan Thomas <jonathan@openshot.org>
*
* @section LICENSE
*
* Copyright (c) 2008-2014 OpenShot Studios, LLC
* <http://www.openshotstudios.com/>. This file is part of
* OpenShot Library (libopenshot), an open-source project dedicated to
* delivering high quality video editing and animation solutions to the
* world. For more information visit <http://www.openshot.org/>.
*
* OpenShot Library (libopenshot) is free software: you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* OpenShot Library (libopenshot) is distributed in the hope that it will be
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef OPENSHOT_PLAYER_BASE_H
#define OPENSHOT_PLAYER_BASE_H
#include <iostream>
#include "ReaderBase.h"
using namespace std;
namespace openshot
{
/**
* @brief This enumeration determines the mode of the video player (i.e. playing, paused, etc...)
*
* A player can be in one of the following modes, which controls how it behaves.
*/
enum PlaybackMode
{
PLAYBACK_PLAY, ///< Play the video normally
PLAYBACK_PAUSED, ///< Pause the video (holding the last displayed frame)
PLAYBACK_LOADING, ///< Loading the video (display a loading animation)
PLAYBACK_STOPPED, ///< Stop playing the video (clear cache, done with player)
};
/**
* @brief This is the base class of all Players in libopenshot.
*
* Players are responsible for displaying images and playing back audio samples with specific
* frame rates and sample rates. All Players must be based on this class, and include these
* methods.
*/
class PlayerBase
{
protected:
float speed;
float volume;
ReaderBase *reader;
PlaybackMode mode;
public:
/// Display a loading animation
virtual void Loading() = 0;
/// Get the current mode
virtual PlaybackMode Mode() = 0;
/// Play the video
virtual void Play() = 0;
/// Pause the video
virtual void Pause() = 0;
/// Get the current frame number being played
virtual int Position() = 0;
/// Seek to a specific frame in the player
virtual void Seek(int64_t new_frame) = 0;
/// Get the Playback speed
virtual float Speed() = 0;
/// Set the Playback speed (1.0 = normal speed, <1.0 = slower, >1.0 faster)
virtual void Speed(float new_speed) = 0;
/// Stop the video player and clear the cached frames
virtual void Stop() = 0;
/// Get the current reader, such as a FFmpegReader
virtual ReaderBase* Reader() = 0;
/// Set the current reader, such as a FFmpegReader
virtual void Reader(ReaderBase *new_reader) = 0;
/// Get the Volume
virtual float Volume() = 0;
/// Set the Volume (1.0 = normal volume, <1.0 = quieter, >1.0 louder)
virtual void Volume(float new_volume) = 0;
};
}
#endif
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