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//
// Lynkeos
// $Id$
//
// Based on ffmpeg_access.c by Christophe JALADY.
// Created by Jean-Etienne LAMIAUD on Mon Jun 27 2005.
//
// Copyright (c) 2004-2005. Christophe JALADY
// Copyright (c) 2005-2018. Jean-Etienne LAMIAUD
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
/*!
* @header
* @abstract Reader for image formats supported by the FFmpeg library.
*/
#ifndef __FFMPEGREADER_H
#define __FFMPEGREADER_H
#include "LynkeosFileReader.h"
#include <libavcodec/avcodec.h>
#include <libavformat/avformat.h>
#include <libswscale/swscale.h>
/**
* \page libraries Libraries needed to compile Lynkeos
* The FFmpeg reader class needs the FFmpeg library.
* It can be found at http://ffmpeg.mplayerhq.hu/
*/
/*!
* @struct KeyFrames_t
* @abstract Structure used to retain the key frames position.
* @discussion It is used to speed the seeking in the sequence.
*/
typedef struct
{
u_long keyFrame; //!< Frame number of the key frame
int64_t timestamp; //!< Timestamp of the key frame
} KeyFrames_t;
typedef enum {DataNeeded, DataRepeat, EndOfFile, Flushing} DecoderState_t;
/*!
* @class FFmpegReader
* @abstract Class for reading movie file formats non supported by Cocoa.
* @ingroup FileAccess
*/
@interface FFmpegReader : NSObject <LynkeosMovieFileReader>
{
@private
u_short _width; //!< Displayed width
u_short _height; //!< Displayed height
u_short _numberOfPlanes; //!< Number of color components
AVFormatContext *_pFormatCtx; //!< FFMpeg file format
AVCodecContext *_pCodecCtx; //!< FFMpeg codec
AVFrame *_pCurrentFrame; //!< Decoded frame
struct SwsContext *_displayConverter; //!< Context for NSImage conversion
struct SwsContext *_procConverter; //!< Context for processing conversion
u_short *_convBuffer; //!< Temporary buffer for conversion
int _bufLineLength; //<! Temporary buffer line length for each plane
int _videoStream; //!< Index of the selected video stream
AVPacket *_packet; //!< Last packet read
DecoderState_t _decoderState; //! State of the decoder with respect to packet data
u_long _numberOfFrames; //!< Number of image frames in the movie
KeyFrames_t *_times; //!< Times of key frames
NSLock *_mutex; //!< Mutex to allow reading from multiple threads
u_long _nextIndex; //!< Index of the next frame to decode
}
@end
#endif
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