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avcodec/vc1dec: Fix support for small widths/linesizes 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-06-14 16:23:09 +02:00
parent 4411928c64
commit 759e793823
1 changed files with 12 additions and 10 deletions
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22
libavcodec/vc1dec.c
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@ -439,7 +439,8 @@ static void vc1_mc_1mv(VC1Context *v, int dir)
|| s->h_edge_pos < 22 || v_edge_pos < 22
|| (unsigned)(src_x - s->mspel) > s->h_edge_pos - (mx&3) - 16 - s->mspel * 3
|| (unsigned)(src_y - 1) > v_edge_pos - (my&3) - 16 - 3) {
uint8_t *uvbuf = s->edge_emu_buffer + 19 * s->linesize;
uint8_t *ubuf = s->edge_emu_buffer + 19 * s->linesize;
uint8_t *vbuf = ubuf + 9 * s->uvlinesize;
srcY -= s->mspel * (1 + s->linesize);
s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY,
@ -448,18 +449,18 @@ static void vc1_mc_1mv(VC1Context *v, int dir)
src_x - s->mspel, src_y - s->mspel,
s->h_edge_pos, v_edge_pos);
srcY = s->edge_emu_buffer;
s->vdsp.emulated_edge_mc(uvbuf, srcU,
s->vdsp.emulated_edge_mc(ubuf, srcU,
s->uvlinesize, s->uvlinesize,
8 + 1, 8 + 1,
uvsrc_x, uvsrc_y,
s->h_edge_pos >> 1, v_edge_pos >> 1);
s->vdsp.emulated_edge_mc(uvbuf + 16, srcV,
s->vdsp.emulated_edge_mc(vbuf, srcV,
s->uvlinesize, s->uvlinesize,
8 + 1, 8 + 1,
uvsrc_x, uvsrc_y,
s->h_edge_pos >> 1, v_edge_pos >> 1);
srcU = uvbuf;
srcV = uvbuf + 16;
srcU = ubuf;
srcV = vbuf;
/* if we deal with range reduction we need to scale source blocks */
if (v->rangeredfrm) {
int i, j;
@ -1959,7 +1960,8 @@ static void vc1_interp_mc(VC1Context *v)
if (v->rangeredfrm || s->h_edge_pos < 22 || v_edge_pos < 22 || use_ic
|| (unsigned)(src_x - 1) > s->h_edge_pos - (mx & 3) - 16 - 3
|| (unsigned)(src_y - 1) > v_edge_pos - (my & 3) - 16 - 3) {
uint8_t *uvbuf = s->edge_emu_buffer + 19 * s->linesize;
uint8_t *ubuf = s->edge_emu_buffer + 19 * s->linesize;
uint8_t *vbuf = ubuf + 9 * s->uvlinesize;
srcY -= s->mspel * (1 + s->linesize);
s->vdsp.emulated_edge_mc(s->edge_emu_buffer, srcY,
@ -1968,18 +1970,18 @@ static void vc1_interp_mc(VC1Context *v)
src_x - s->mspel, src_y - s->mspel,
s->h_edge_pos, v_edge_pos);
srcY = s->edge_emu_buffer;
s->vdsp.emulated_edge_mc(uvbuf, srcU,
s->vdsp.emulated_edge_mc(ubuf, srcU,
s->uvlinesize, s->uvlinesize,
8 + 1, 8 + 1,
uvsrc_x, uvsrc_y,
s->h_edge_pos >> 1, v_edge_pos >> 1);
s->vdsp.emulated_edge_mc(uvbuf + 16, srcV,
s->vdsp.emulated_edge_mc(vbuf, srcV,
s->uvlinesize, s->uvlinesize,
8 + 1, 8 + 1,
uvsrc_x, uvsrc_y,
s->h_edge_pos >> 1, v_edge_pos >> 1);
srcU = uvbuf;
srcV = uvbuf + 16;
srcU = ubuf;
srcV = vbuf;
/* if we deal with range reduction we need to scale source blocks */
if (v->rangeredfrm) {
int i, j;