example.cpp

unique_ptr<Frame> Decoder::convertVideoFrame( const Frame &frame ) const
{
    CI_ASSERT( frame.getMediaType() == AVMEDIA_TYPE_VIDEO );
    unique_ptr<Frame> result( new FrameVideo( frame.getTimeBase() ) );
    
    result->getAvFrame()->format = AV_PIX_FMT_RGB24;
    result->getAvFrame()->width = frame.getAvFrame()->width;
    result->getAvFrame()->height = frame.getAvFrame()->height;
    
    // allocate backing
    av_frame_get_buffer( result->getAvFrame(), 64 );
    
    // copy metadata
    av_frame_copy_props( result->getAvFrame(), frame.getAvFrame() );

    // swizzle the packet PTS / DTS to start at 0 if we have them set.
    if( ( mStartTime != INT64_MIN ) && ( mEndTime != INT64_MAX ) ) {        
        av_frame_set_best_effort_timestamp( result->getAvFrame(), result->getAvFrame()->pts - mStartTime);
        result->getAvFrame()->pts = result->getAvFrame()->pts - mStartTime;
        result->getAvFrame()->pkt_pts = result->getAvFrame()->pkt_pts - mStartTime;
        result->getAvFrame()->pkt_dts = result->getAvFrame()->pkt_dts - mStartTime;
    }
    
    // scale if we arent 1920x1080, and convert YUV->RGB
    sws_scale( mPixelFormatConversionContext,
              frame.getAvFrame()->data,
              frame.getAvFrame()->linesize,
              0,
              frame.getAvFrame()->height,
              result->getAvFrame()->data,
              result->getAvFrame()->linesize );

    return result;
}