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/**
* @file llmediabase.h
* @brief LLMedia support - base class
*
* $LicenseInfo:firstyear=2005&license=viewergpl$
*
* Copyright (c) 2005-2007, Linden Research, Inc.
*
* Second Life Viewer Source Code
* The source code in this file ("Source Code") is provided by Linden Lab
* to you under the terms of the GNU General Public License, version 2.0
* ("GPL"), unless you have obtained a separate licensing agreement
* ("Other License"), formally executed by you and Linden Lab. Terms of
* the GPL can be found in doc/GPL-license.txt in this distribution, or
* online at http://secondlife.com/developers/opensource/gplv2
*
* There are special exceptions to the terms and conditions of the GPL as
* it is applied to this Source Code. View the full text of the exception
* in the file doc/FLOSS-exception.txt in this software distribution, or
* online at http://secondlife.com/developers/opensource/flossexception
*
* By copying, modifying or distributing this software, you acknowledge
* that you have read and understood your obligations described above,
* and agree to abide by those obligations.
*
* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
* COMPLETENESS OR PERFORMANCE.
* $/LicenseInfo$
*/
// header guard
#ifndef llmediabase_h
#define llmediabase_h
#include "llstring.h"
#include "llmediaemitter.h"
#include "llmediaobservers.h"
#include "llmediaemitterevents.h"
class LLMediaBase
{
public:
LLMediaBase ();
// do the right thing with dtor
virtual ~LLMediaBase ()
{
};
///////////////////////////////////////////////////////////////////////////////
// public interface:
///////////////////////////////////////////////////////////////////////////////
// different types of supported media
enum MediaType { Unknown, QuickTime };
///////////////////////////////////////////////////////////////////////////////
// factory method based on explicit media type
static LLMediaBase* make ( const MediaType mediaTypeIn, S32 width_pixels, S32 height_pixels );
// Result codes for updateMedia
enum
{
updateMediaNoChanges,
updateMediaNeedsUpdate,
updateMediaNeedsSizeChange
} updateMediaResult;
// housekeeping
virtual BOOL setBuffer ( U8* bufferIn ) = 0;
virtual bool setBufferSize(S32 width_pixels, S32 height_pixels) { return false; }
virtual BOOL init ();
virtual BOOL load ( const LLString& urlIn );
virtual BOOL unload ();
// media data
virtual S32 updateMedia () = 0;
virtual U8* getMediaData () = 0;
virtual S32 getTextureWidth () const;
virtual S32 getTextureHeight () const;
virtual S32 getTextureDepth () const;
virtual S32 getTextureFormatInternal () const;
virtual S32 getTextureFormatPrimary () const;
virtual S32 getTextureFormatType () const;
virtual S32 getTextureFormatSwapBytes () const;
virtual S32 getMediaWidth () const;
virtual S32 getMediaHeight () const;
virtual S32 getMediaDepthBytes () const;
virtual S32 getMediaBufferSize () const;
// allow consumers to observe media events
virtual BOOL addMediaObserver( LLMediaObserver* observerIn );
virtual BOOL remMediaObserver( LLMediaObserver* observerIn );
// MBW -- XXX -- These don't belong here!
// LLMediaEngine should really only deal with LLMediaMovieBase subclasses
virtual BOOL stop () { return TRUE; }
virtual BOOL play () { return TRUE; }
virtual BOOL loop ( S32 howMany ) { return TRUE; }
virtual BOOL pause () { return TRUE; }
virtual BOOL seek ( F64 time ) { return TRUE; }
virtual BOOL setVolume ( F32 volumeIn ) { return TRUE; }
virtual BOOL isLoaded () const { return TRUE; }
virtual BOOL isPaused () const { return FALSE; }
virtual BOOL isPlaying () const { return TRUE; }
virtual BOOL isLooping () const { return FALSE; }
virtual void setAutoScaled ( BOOL autoScaledIn ) {}
protected:
// event emitter
LLMediaEmitter<LLMediaObserver> mMediaEventEmitter;
U32 mBufferChangeCount; // Incremented when the buffer changes
U32 mLastBufferChangeCount; // Set to mBufferChangeCount when the buffer is reported as changed
S32 mMediaWidth;
S32 mMediaHeight;
S32 mMediaDepthBytes;
S32 mMediaRowbytes;
S32 mTextureWidth;
S32 mTextureHeight;
S32 mTextureDepth;
S32 mTextureFormatInternal;
S32 mTextureFormatPrimary;
S32 mTextureFormatType;
S32 mTextureFormatSwapBytes;
public:
// Has memory buffer been updated? (page content change, scroll, movie frame drawn, etc)
void bufferChanged() { mBufferChangeCount++; }
bool getBufferChanged() const { return mBufferChangeCount != mLastBufferChangeCount; }
void resetBufferChanged() { mLastBufferChangeCount = mBufferChangeCount; }
};
#endif // llmediabase_h
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