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avcodec/mpegvideo_motion: Fix off by 1 error in MV bounds checking in qpel, chroma_4mv and 8x8

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-03-08 01:45:53 +01:00
parent 9f0eaf792a
commit 8849c4ceac
1 changed files with 6 additions and 6 deletions
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12
libavcodec/mpegvideo_motion.c
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@ -536,8 +536,8 @@ static inline void qpel_motion(MpegEncContext *s,
ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;
ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;
if ((unsigned)src_x > FFMAX(s->h_edge_pos - (motion_x & 3) - 16, 0) ||
(unsigned)src_y > FFMAX( v_edge_pos - (motion_y & 3) - h, 0)) {
if ((unsigned)src_x >= FFMAX(s->h_edge_pos - (motion_x & 3) - 15 , 0) ||
(unsigned)src_y >= FFMAX( v_edge_pos - (motion_y & 3) - h + 1, 0)) {
s->vdsp.emulated_edge_mc(s->edge_emu_buffer, ptr_y,
s->linesize, s->linesize,
17, 17 + field_based,
@ -620,8 +620,8 @@ static void chroma_4mv_motion(MpegEncContext *s,
offset = src_y * s->uvlinesize + src_x;
ptr = ref_picture[1] + offset;
if ((unsigned)src_x > FFMAX((s->h_edge_pos >> 1) - (dxy & 1) - 8, 0) ||
(unsigned)src_y > FFMAX((s->v_edge_pos >> 1) - (dxy >> 1) - 8, 0)) {
if ((unsigned)src_x >= FFMAX((s->h_edge_pos >> 1) - (dxy & 1) - 7, 0) ||
(unsigned)src_y >= FFMAX((s->v_edge_pos >> 1) - (dxy >> 1) - 7, 0)) {
s->vdsp.emulated_edge_mc(s->edge_emu_buffer, ptr,
s->uvlinesize, s->uvlinesize,
9, 9, src_x, src_y,
@ -778,8 +778,8 @@ static inline void apply_8x8(MpegEncContext *s,
dxy &= ~12;
ptr = ref_picture[0] + (src_y * s->linesize) + (src_x);
if ((unsigned)src_x > FFMAX(s->h_edge_pos - (motion_x & 3) - 8, 0) ||
(unsigned)src_y > FFMAX(s->v_edge_pos - (motion_y & 3) - 8, 0)) {
if ((unsigned)src_x >= FFMAX(s->h_edge_pos - (motion_x & 3) - 7, 0) ||
(unsigned)src_y >= FFMAX(s->v_edge_pos - (motion_y & 3) - 7, 0)) {
s->vdsp.emulated_edge_mc(s->edge_emu_buffer, ptr,
s->linesize, s->linesize,
9, 9,