h264: fix interpretation of interleved stereo modes

Column and row frame packing arrangements were inverted.

Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
(cherry picked from commit a7e541c992)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/h264.c

@@ -841,10 +841,10 @@ static void decode_postinit(H264Context *h, int setup_finished)
             stereo->type = AV_STEREO3D_CHECKERBOARD;
             break;
         case 1:
-            stereo->type = AV_STEREO3D_LINES;
+            stereo->type = AV_STEREO3D_COLUMNS;
             break;
         case 2:
-            stereo->type = AV_STEREO3D_COLUMNS;
+            stereo->type = AV_STEREO3D_LINES;
             break;
         case 3:
             if (h->quincunx_subsampling)

libavcodec/libx264.c

@@ -236,10 +236,10 @@ static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame,
             case AV_STEREO3D_CHECKERBOARD:
                 fpa_type = 0;
                 break;
-            case AV_STEREO3D_LINES:
+            case AV_STEREO3D_COLUMNS:
                 fpa_type = 1;
                 break;
-            case AV_STEREO3D_COLUMNS:
+            case AV_STEREO3D_LINES:
                 fpa_type = 2;
                 break;
             case AV_STEREO3D_SIDEBYSIDE: