libx264: set frame packing information when relevant information is found

libavcodec/libx264.c

@@ -23,6 +23,7 @@
 #include "libavutil/opt.h"
 #include "libavutil/mem.h"
 #include "libavutil/pixdesc.h"
+#include "libavutil/stereo3d.h"
 #include "avcodec.h"
 #include "internal.h"
 
@@ -134,6 +135,7 @@ static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame,
     x264_nal_t *nal;
     int nnal, i, ret;
     x264_picture_t pic_out;
+    AVFrameSideData *side_data;
 
     x264_picture_init( &x4->pic );
     x4->pic.img.i_csp   = x4->params.i_csp;
@@ -163,8 +165,42 @@ static int X264_frame(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame,
             x4->params.vui.i_sar_width  = ctx->sample_aspect_ratio.num;
             x264_encoder_reconfig(x4->enc, &x4->params);
         }
-    }
 
+        side_data = av_frame_get_side_data(frame, AV_FRAME_DATA_STEREO3D);
+        if (side_data) {
+            AVStereo3D *stereo = (AVStereo3D *)side_data->data;
+            int fpa_type;
+
+            switch (stereo->type) {
+            case AV_STEREO3D_CHECKERBOARD:
+                fpa_type = 0;
+                break;
+            case AV_STEREO3D_LINES:
+                fpa_type = 1;
+                break;
+            case AV_STEREO3D_COLUMNS:
+                fpa_type = 2;
+                break;
+            case AV_STEREO3D_SIDEBYSIDE:
+                fpa_type = 3;
+                break;
+            case AV_STEREO3D_TOPBOTTOM:
+                fpa_type = 4;
+                break;
+            case AV_STEREO3D_FRAMESEQUENCE:
+                fpa_type = 5;
+                break;
+            default:
+                fpa_type = -1;
+                break;
+            }
+
+            if (fpa_type != x4->params.i_frame_packing) {
+                x4->params.i_frame_packing = fpa_type;
+                x264_encoder_reconfig(x4->enc, &x4->params);
+            }
+        }
+    }
     do {
         if (x264_encoder_encode(x4->enc, &nal, &nnal, frame? &x4->pic: NULL, &pic_out) < 0)
             return -1;