omxil: Recognize some semiplanar 420 formats

I'm not sure if these officially are NV12 or NV21 - on Nexus One
they correspond to NV21 at least.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/codec/omxil/utils.c

@@ -36,6 +36,8 @@
 
 #include "omxil.h"
 
+#define OMX_QCOM_COLOR_FormatYVU420SemiPlanar 0x7FA30C00
+
 /*****************************************************************************
  * Events utility functions
  *****************************************************************************/
@@ -347,6 +349,8 @@ static const struct
 {
     { VLC_CODEC_I420, OMX_COLOR_FormatYUV420Planar, 3, 1, 2 },
     { VLC_CODEC_I420, OMX_COLOR_FormatYUV420PackedPlanar, 3, 1, 2 },
+    { VLC_CODEC_NV21, OMX_COLOR_FormatYUV420SemiPlanar, 3, 1, 1 },
+    { VLC_CODEC_NV21, OMX_QCOM_COLOR_FormatYVU420SemiPlanar, 3, 1, 1 },
     { VLC_CODEC_YUYV, OMX_COLOR_FormatYCbYCr, 4, 2, 0 },
     { VLC_CODEC_YVYU, OMX_COLOR_FormatYCrYCb, 4, 2, 0 },
     { VLC_CODEC_UYVY, OMX_COLOR_FormatCbYCrY, 4, 2, 0 },