atmo: fix handling of YV12 Frames (with hardware acceleration)

- exchange U and V plane to get the right colors again
- fixed some compiler warnings about signed - unsigned compare
- and some missing case entries

modules/video_filter/atmo/AtmoMultiConnection.cpp

@@ -381,9 +381,9 @@ ATMO_BOOL CAtmoMultiConnection::setChannelValues(int numValues,unsigned char *ch
 
 
   Lock();
-  int Index = 0;
+  size_t Index = 0;
   for (int i = 0; i < numValues; i+=2) {
-       Index = (int)channel_values[i];
+       Index = (size_t)channel_values[i];
        if(Index < sizeof(m_output))
           m_output[Index] = channel_values[i + 1];
   }

modules/video_filter/atmo/AtmoTools.cpp

@@ -128,6 +128,8 @@ EffectMode CAtmoTools::SwitchEffect(CAtmoDynData *pDynData, EffectMode newEffect
         // neuen EffectThread nur mit aktiver Connection starten...
 
         switch(newEffectMode) {
+            case emUndefined: // do nothing also in that case (avoid compiler warning)
+                break;
             case emDisabled:
                 break;
 
@@ -223,6 +225,8 @@ LivePictureSource CAtmoTools::SwitchLiveSource(CAtmoDynData *pDynData, LivePictu
         }
 
         switch(pDynData->getLivePictureSource()) {
+               case lpsDisabled: // do nothing in that case - avoid compiler warning
+               break;
 #if !defined(_ATMO_VLC_PLUGIN_)
                case lpsScreenCapture:
                     input = new CAtmoGdiDisplayCaptureInput( pDynData );

modules/video_filter/atmo/atmo.cpp

@@ -735,6 +735,8 @@ struct filter_sys_t
     bool b_show_dots;
     int32_t i_device_type;
 
+    bool b_swap_uv;
+
     int32_t i_atmo_width;
     int32_t i_atmo_height;
     /* used to disable fadeout if less than 50 frames are processed
@@ -1736,8 +1738,12 @@ static void Atmo_SetupParameters(filter_t *p_filter)
     switch( p_filter->fmt_in.video.i_chroma )
     {
     case VLC_CODEC_I420:
+        p_sys->pf_extract_mini_image = ExtractMiniImage_YUV;
+        p_sys->b_swap_uv = false;
+        break;
     case VLC_CODEC_YV12:
         p_sys->pf_extract_mini_image = ExtractMiniImage_YUV;
+        p_sys->b_swap_uv = true;
         break;
     default:
         msg_Warn( p_filter, "InitFilter-unsupported chroma: %4.4s",
@@ -2105,6 +2111,16 @@ static void ExtractMiniImage_YUV(filter_sys_t *p_sys,
         p_src_v = p_inpic->p[V_PLANE].p_pixels +
             p_inpic->p[V_PLANE].i_pitch * i_v_row;
 
+        if(p_sys->b_swap_uv)
+        {
+          /*
+           swap u and v plane for YV12 images
+          */
+          uint8_t *p_temp_plane = p_src_u;
+          p_src_u = p_src_v;
+          p_src_v = p_temp_plane;
+        }
+
         for(i_col = 1; i_col < i_col_count; i_col++)
         {
             i_pixel_col = (i_col * p_sys->i_crop_width) / i_col_count +
@@ -2292,7 +2308,7 @@ static picture_t * Filter( filter_t *p_filter, picture_t *p_pic )
 {
     filter_sys_t *p_sys = p_filter->p_sys;
     if( !p_pic ) return NULL;
-    
+
     picture_t *p_outpic = filter_NewPicture( p_filter );
     if( !p_outpic )
     {
@@ -2300,7 +2316,7 @@ static picture_t * Filter( filter_t *p_filter, picture_t *p_pic )
         return NULL;
     }
     picture_CopyPixels( p_outpic, p_pic );
-    
+
     vlc_mutex_lock( &p_sys->filter_lock );
 
     if(p_sys->b_enabled && p_sys->pf_extract_mini_image &&