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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.
This commit is contained in:
David Conrad 2011-02-19 01:41:51 -08:00 committed by Jason Garrett-Glaser
parent 9707f84fa7
commit a89f4ca005
1 changed files with 1 additions and 2 deletions
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3
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;