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Fix VP3 edge emulation

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With negative stride, the start of the edge_emu buffer should be pointing to
the last line, not the end of the buffer.
With positive stride, pointing to the end of the buffer was completely wrong.
(cherry picked from commit a89f4ca005)
This commit is contained in:
David Conrad 2011-02-19 01:41:51 -08:00 committed by Michael Niedermayer
parent 695f39c80b
commit 0cfcbf217f
1 changed files with 1 additions and 2 deletions
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libavcodec/vp3.c
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@ -1459,8 +1459,7 @@ static void render_slice(Vp3DecodeContext *s, int slice)
if(src_x<0 || src_y<0 || src_x + 9 >= plane_width || src_y + 9 >= plane_height){
uint8_t *temp= s->edge_emu_buffer;
if(stride<0) temp -= 9*stride;
else temp += 9*stride;
if(stride<0) temp -= 8*stride;
s->dsp.emulated_edge_mc(temp, motion_source, stride, 9, 9, src_x, src_y, plane_width, plane_height);
motion_source= temp;