x264 stereo mode patch for Matroska

gistfile1.c

diff --git a/output/matroska.c b/output/matroska.c
index baa0f1c..f623a2f 100644
--- a/output/matroska.c
+++ b/output/matroska.c
@@ -33,6 +33,7 @@ typedef struct
     int width, height, d_width, d_height;
 
     int display_size_units;
+    int stereomode;
 
     int64_t frame_duration;
 
@@ -79,6 +80,7 @@ static int set_param( hnd_t handle, x264_param_t *p_param )
     p_mkv->width = p_mkv->d_width = p_param->i_width;
     p_mkv->height = p_mkv->d_height = p_param->i_height;
     p_mkv->display_size_units = DS_PIXELS;
+    p_mkv->stereomode = p_param->i_frame_packing;
 
     if( p_param->vui.i_sar_width && p_param->vui.i_sar_height
         && p_param->vui.i_sar_width != p_param->vui.i_sar_height )
@@ -147,7 +149,7 @@ static int write_headers( hnd_t handle, x264_nal_t *p_nal )
     ret = mk_write_header( p_mkv->w, "x264" X264_VERSION, "V_MPEG4/ISO/AVC",
                            avcC, avcC_len, p_mkv->frame_duration, 50000,
                            p_mkv->width, p_mkv->height,
-                           p_mkv->d_width, p_mkv->d_height, p_mkv->display_size_units );
+                           p_mkv->d_width, p_mkv->d_height, p_mkv->display_size_units, p_mkv->stereomode );
     if( ret < 0 )
         return ret;
 
diff --git a/output/matroska_ebml.c b/output/matroska_ebml.c
index 55c1cc3..487fc61 100644
--- a/output/matroska_ebml.c
+++ b/output/matroska_ebml.c
@@ -317,13 +317,15 @@ mk_writer *mk_create_writer( const char *filename )
     return w;
 }
 
+const int stereomodes[7]={0,0,0,0,1,3,0}; // 2D,2D,2D,2D,side by side,top-bottom,2D
+
 int mk_write_header( mk_writer *w, const char *writing_app,
                      const char *codec_id,
                      const void *codec_private, unsigned codec_private_size,
                      int64_t default_frame_duration,
                      int64_t timescale,
                      unsigned width, unsigned height,
-                     unsigned d_width, unsigned d_height, int display_size_units )
+                     unsigned d_width, unsigned d_height, int display_size_units, int stereomode )
 {
     mk_context  *c, *ti, *v;
 
@@ -379,6 +381,7 @@ int mk_write_header( mk_writer *w, const char *writing_app,
     CHECK( mk_write_uint( v, 0x54b2, display_size_units ) );
     CHECK( mk_write_uint( v, 0x54b0, d_width ) );
     CHECK( mk_write_uint( v, 0x54ba, d_height ) );
+    CHECK( mk_write_uint( v, 0x53b8, stereomodes[stereomode+1] ) );
     CHECK( mk_close_context( v, 0 ) );
 
     CHECK( mk_close_context( ti, 0 ) );
diff --git a/output/matroska_ebml.h b/output/matroska_ebml.h
index 1c6cad7..e567a19 100644
--- a/output/matroska_ebml.h
+++ b/output/matroska_ebml.h
@@ -42,7 +42,7 @@ int mk_write_header( mk_writer *w, const char *writing_app,
                      int64_t default_frame_duration,
                      int64_t timescale,
                      unsigned width, unsigned height,
-                     unsigned d_width, unsigned d_height, int display_size_units );
+                     unsigned d_width, unsigned d_height, int display_size_units, int stereomode );
 
 int mk_start_frame( mk_writer *w );
 int mk_add_frame_data( mk_writer *w, const void *data, unsigned size );
-- 
1.7.11.msysgit.0