llmediaimplexample1.cpp

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#include "llmediaimplexample1.h"
#include "llmediaimplregister.h"

// register this impl with media manager factory
static LLMediaImplRegister sLLMediaImplExample1Reg( "LLMediaImplExample1", new LLMediaImplExample1Maker() );

#include <iostream>

#include <time.h>

//
LLMediaImplExample1Maker::LLMediaImplExample1Maker()
{
        // Register to handle the scheme
        mSchema.push_back( "example1" );
}

//
LLMediaImplExample1::LLMediaImplExample1() :
        mMediaPixels( 0 )
{
        setRequestedMediaSize( 400, 200 );
        setMediaDepth( 3 );

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

// (static) super-initialization - called once at application startup
bool LLMediaImplExample1::startup( LLMediaManagerData* init_data )
{
        return true;
}

// (static) super-uninitialization - called once at application closedown
bool LLMediaImplExample1::closedown()
{
        return true;
}

// virtual
bool LLMediaImplExample1::init()
{
        int buffer_size = getMediaBufferSize();

        mMediaPixels = new unsigned char[ buffer_size ];

        memset( mMediaPixels, 0xAA, buffer_size );

        return true;
}

// virtual
bool LLMediaImplExample1::navigateTo( const std::string url )
{
        std::cout << "LLMediaImplExample1::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 LLMediaImplExample1::getVersion()
{
        std::string version_string = "[" + sLLMediaImplExample1Reg.getImplName() + "] - " + "1.0.0.0";

        return version_string;
}

// virtual
bool LLMediaImplExample1::updateMedia()
{
        if ( mMediaPixels && getStatus() == LLMediaBase::STATUS_STARTED )
        {
                // first time - make sure it's a few seconds back so first update happens immediately
                static time_t t = time( 0 ) - 4;

                // selected time period elapsed (1 second)
                if ( time( 0 ) - t > 1 )
                {
                        // display checkerboard
                        const int num_squares = rand() % 20 + 4;
                        int sqr1_r = rand() % 0x80;
                        int sqr1_g = rand() % 0x80;
                        int sqr1_b = rand() % 0x80;
                        int sqr2_r = rand() % 0x80;
                        int sqr2_g = rand() % 0x80;
                        int sqr2_b = rand() % 0x80;

                        for ( int y1 = 0; y1 < num_squares; ++y1 )
                        {
                                for ( int x1 = 0; x1 < num_squares; ++x1 )
                                {
                                        int px_start = getMediaWidth() * x1 / num_squares;
                                        int px_end = ( getMediaWidth() * ( x1 + 1 ) ) / num_squares;
                                        int py_start = getMediaHeight() * y1 / num_squares;
                                        int py_end = ( getMediaHeight() * ( y1 + 1 ) ) / num_squares;

                                        for( int y2 = py_start; y2 < py_end; ++y2 )
                                        {
                                                for( int x2 = px_start; x2 < px_end; ++x2 )
                                                {
                                                        int rowspan = getMediaWidth() * getMediaDepth();

                                                        if ( ( y1 % 2 ) ^ ( x1 % 2 ) )
                                                        {
                                                                mMediaPixels[ y2 * rowspan + x2 * getMediaDepth() + 0 ] = sqr1_r;
                                                                mMediaPixels[ y2 * rowspan + x2 * getMediaDepth() + 1 ] = sqr1_g;
                                                                mMediaPixels[ y2 * rowspan + x2 * getMediaDepth() + 2 ] = sqr1_b;
                                                        }
                                                        else
                                                        {
                                                                mMediaPixels[ y2 * rowspan + x2 * getMediaDepth() + 0 ] = sqr2_r;
                                                                mMediaPixels[ y2 * rowspan + x2 * getMediaDepth() + 1 ] = sqr2_g;
                                                                mMediaPixels[ y2 * rowspan + x2 * getMediaDepth() + 2 ] = sqr2_b;
                                                        };
                                                };
                                        };
                                };
                        };

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

                        // reset time
                        t = time( 0 );

                        return true;
                };
        };

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

        return false;
}

// virtual
unsigned char* LLMediaImplExample1::getMediaData()
{
        return mMediaPixels;
}

// virtual
bool LLMediaImplExample1::reset()
{
        if ( mMediaPixels )
        {
                delete [] mMediaPixels;
        };

        return true;
}

// virtual
bool LLMediaImplExample1::mouseMove( int x_pos, int y_pos )
{
        if ( mMediaPixels && getStatus() == LLMediaBase::STATUS_STARTED )
        {
                int base_pos = x_pos * getMediaDepth() + y_pos * getMediaDepth() * getMediaWidth();
                // example: write a bright pixel to the display when we move the mouse
                mMediaPixels[ base_pos + 0 ] = rand() % 0x80 + 0x80;
                mMediaPixels[ base_pos + 1 ] = rand() % 0x80 + 0x80;
                mMediaPixels[ base_pos + 2 ] = rand() % 0x80 + 0x80;

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

        return true;
}


// virtual
bool LLMediaImplExample1::setRequestedMediaSize( int width, int height )
{
        // we accept any size:
        return setMediaSize(width, height);
}

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