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* Copyright (C) 2005-2010 Team XBMC
* 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, 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
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with XBMC; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
#include "DllAvFormat.h"
#include "DllAvCodec.h"
#include "DllAvUtil.h"
#include "DllSwScale.h"
class CBaseTexture;
class m_dllAvFormat;
class m_dllAvCodec;
class m_dllAvUtil;
class m_dllSwScale;
struct AVFormatContext;
struct AVCodecContext;
struct AVCodec;
struct AVFrame;
// C++ Interface: karaokevideoffmpeg
// Contact: oldnemesis
// FFMpeg-based background video decoder for Karaoke background.
// We are not using DVDPlayer for this because:
// 1. DVDPlayer was not designed to run at the same time when music is being played and other things (like lyrics) rendered.
// While this setup works from time to time, it constantly gets broken. Some modes, like VDPAU, lead to crash right away.
// 2. We do not need to decode audio, hence we don't have to use extra CPU.
// 3. We do not really care about frame rate. Jerky video is fine for the background. Lyrics sync is much more important.
class KaraokeVideoFFMpeg
// Start playing the video. It is called each time a new song is being played. Should continue playing existing
// video from the position it was paused. If it returns false, the video rendering is disabled and
// KaraokeVideoFFMpeg object is deleted. Must write the reason for failure into the log file.
bool Start( const CStdString& filename = "" );
// Render the current frame into the screen. This function also must handle video loops and
// switching to the next video when necessary. Hence it shouldn't take too long.
void Render();
// Stops playing the video. It is called once the song is finished and the Render() is not going to be called anymore.
// The object, however, is kept and should keep its state because it must continue on next Start() call.
void Stop();
// Initialize the object. This function is called only once when the object is created or after it has been dismissed.
// If it returns false, the video rendering is disabled and KaraokeVideoFFMpeg object is deleted
bool Init();
// Dismisses the object, freeing all the memory and unloading the libraries. The object must be inited before using again.
void Dismiss();
bool openVideoFile( const CStdString& filename );
void closeVideoFile();
bool readFrame( int frame );
// FFMpeg objects
DllAvFormat *m_dllAvFormat;
DllAvCodec *m_dllAvCodec;
DllAvUtil *m_dllAvUtil;
DllSwScale *m_dllSwScale;
CStdString m_curVideoFile;
unsigned int skipFrames;
AVFormatContext *pFormatCtx;
int videoStream;
AVCodecContext *pCodecCtx;
AVCodec *pCodec;
AVFrame *pFrame;
AVPicture *pFrameRGB;
int m_videoWidth; // shown video width, i.e. upscaled or downscaled as necessary
int m_videoHeight; // shown video height, i.e. upscaled or downscaled as necessary
int m_displayLeft, m_displayRight, m_displayTop, m_displayBottom; // Video as shown at the display
int m_maxFrame;
int m_fps_den;
int m_fps_num;
int m_currentFrameNumber;
int m_frameBase; // For video resuming
CBaseTexture *m_texture;
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