llmediaimplexample2.cpp

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#include "llmediaimplexample2.h"
#include "llmediaimplregister.h"

// register this impl with media manager factory
static LLMediaImplRegister sLLMediaImplExample2Reg( "LLMediaImplExample2", new LLMediaImplExample2Maker() );

#include <iostream>
#include <time.h>

//
LLMediaImplExample2Maker::LLMediaImplExample2Maker()
{
        // Register to handle the scheme
        mSchema.push_back( "example2" );
}

//
LLMediaImplExample2::LLMediaImplExample2() :
        mMediaPixels( 0 )
{
        setRequestedMediaSize( 500, 500 );
        setMediaDepth( 3 );

        mXpos = ( getMediaWidth() / 2 ) + rand() % ( getMediaWidth() / 16 ) - ( getMediaWidth() / 32 );
        mYpos = ( getMediaHeight() / 2 ) + rand() % ( getMediaHeight() / 16 ) - ( getMediaHeight() / 32 );

        srand( (unsigned int)(time( NULL )) );
}

// (static) super-initialization - called once at application startup
bool LLMediaImplExample2::startup( LLMediaManagerData* init_data )
{
        return true;
}

// (static) super-uninitialization - called once at application closedown
bool LLMediaImplExample2::closedown()
{
        return true;
}

// virtual
bool LLMediaImplExample2::init()
{
        int buffer_size = getMediaBufferSize();

        mMediaPixels = new unsigned char[ buffer_size ];

        memset( mMediaPixels, 0x00, buffer_size );

        return true;
}

// virtual
bool LLMediaImplExample2::navigateTo( const std::string url )
{
        std::cout << "LLMediaImplExample2::navigateTo" << std::endl;

        setStatus( LLMediaBase::STATUS_NAVIGATING );

        // force a size change event for new URL
        LLMediaEvent event( this );
        mEventEmitter.update( &LLMediaObserver::onMediaSizeChange, event );

        return true;
}

// virtual
std::string LLMediaImplExample2::getVersion()
{
        std::string version_string = "[" + sLLMediaImplExample2Reg.getImplName() + "] - " + "1.0.0.0";

        return version_string;
}

// virtual
bool LLMediaImplExample2::updateMedia()
{
        if ( mMediaPixels && getStatus() == LLMediaBase::STATUS_STARTED )
        {
                static int x_inc = rand() % 5 + 2;
                static int y_inc = rand() % 5 + 2;
                int block_size = 32;

                for( int y = 0; y < block_size; ++y )
                {
                        for( int x = 0; x < block_size; ++x )
                        {
                                int rowspan = getMediaWidth() * getMediaDepth();
                                mMediaPixels[ ( mXpos + x ) * getMediaDepth() + ( mYpos + y ) * rowspan + 0 ] = 0;
                                mMediaPixels[ ( mXpos + x ) * getMediaDepth() + ( mYpos + y ) * rowspan + 1 ] = 0;
                                mMediaPixels[ ( mXpos + x ) * getMediaDepth() + ( mYpos + y ) * rowspan + 2 ] = 0;
                        };
                };

                if ( mXpos + x_inc < 0 || mXpos + x_inc >= getMediaWidth() - block_size )
                        x_inc =- x_inc;

                if ( mYpos + y_inc < 0 || mYpos + y_inc >= getMediaHeight() - block_size )
                        y_inc =- y_inc;

                mXpos += x_inc;
                mYpos += y_inc;

                unsigned char col_r = rand() % 0xff;
                unsigned char col_g = rand() % 0xff;
                unsigned char col_b = rand() % 0xff;

                for( int y = 0; y < block_size; ++y )
                {
                        for( int x = 0; x < block_size; ++x )
                        {
                                int rowspan = getMediaWidth() * getMediaDepth();
                                mMediaPixels[ ( mXpos + x ) * getMediaDepth() + ( mYpos + y ) * rowspan + 0 ] = col_r;
                                mMediaPixels[ ( mXpos + x ) * getMediaDepth() + ( mYpos + y ) * rowspan + 1 ] = col_g;
                                mMediaPixels[ ( mXpos + x ) * getMediaDepth() + ( mYpos + y ) * rowspan + 2 ] = col_b;
                        };
                };

                // emit an event to say that something in the media stream changed
                LLMediaEvent event( this );
                mEventEmitter.update( &LLMediaObserver::onMediaContentsChange, event );
        };

        // update the command (e.g. transport controls) state
        updateCommand();

        return false;
}

// virtual
unsigned char* LLMediaImplExample2::getMediaData()
{
        return mMediaPixels;
}

// virtual
bool LLMediaImplExample2::reset()
{
        if ( mMediaPixels )
        {
                delete [] mMediaPixels;
        };

        return true;
}

// virtual
bool LLMediaImplExample2::setRequestedMediaSize( int width, int height )
{
        // we accept any size:
        return setMediaSize(width, height);
}

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