shithub: libvpx

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Added border extension

To the source buffer to be encoded as an alt ref frame. This is to fix
the problem of using uninitialized memory in encoder.

See https://code.google.com/p/webm/issues/detail?id=605

Change-Id: I97618a2fc207e08abcf5301b734aa9e3ad695e2c

--- a/vp9/encoder/vp9_onyx_if.c

+++ b/vp9/encoder/vp9_onyx_if.c

@@ -3647,6 +3647,8 @@

         configure_arnr_filter(cpi, cm->current_video_frame + frames_to_arf,

                               cpi->gfu_boost);

         vp9_temporal_filter_prepare(cpi, frames_to_arf);

+        vp9_extend_frame_borders(&cpi->alt_ref_buffer,

+                                 cm->subsampling_x, cm->subsampling_y);

         force_src_buffer = &cpi->alt_ref_buffer;

       }