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avcodec/jpeg2000dec: Fix potential integer overflow with tile dimensions

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 65d3359fb366ea265a8468d76a111cb7352f0b55)

Conflicts:

	libavcodec/jpeg2000dec.c
This commit is contained in:
Michael Niedermayer 2015-11-15 21:17:05 +01:00
parent 912dfe167f
commit b7d98b2fe7
1 changed files with 4 additions and 4 deletions
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8
libavcodec/jpeg2000dec.c
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@ -690,10 +690,10 @@ static int init_tile(Jpeg2000DecoderContext *s, int tileno)
Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
int ret; // global bandno
comp->coord_o[0][0] = av_clip(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x, s->width);
comp->coord_o[0][1] = av_clip((tilex + 1) * s->tile_width + s->tile_offset_x, s->image_offset_x, s->width);
comp->coord_o[1][0] = av_clip(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y, s->height);
comp->coord_o[1][1] = av_clip((tiley + 1) * s->tile_height + s->tile_offset_y, s->image_offset_y, s->height);
comp->coord_o[0][0] = av_clip(tilex * (int64_t)s->tile_width + s->tile_offset_x, s->image_offset_x, s->width);
comp->coord_o[0][1] = av_clip((tilex + 1) * (int64_t)s->tile_width + s->tile_offset_x, s->image_offset_x, s->width);
comp->coord_o[1][0] = av_clip(tiley * (int64_t)s->tile_height + s->tile_offset_y, s->image_offset_y, s->height);
comp->coord_o[1][1] = av_clip((tiley + 1) * (int64_t)s->tile_height + s->tile_offset_y, s->image_offset_y, s->height);
comp->coord[0][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], s->reduction_factor);
comp->coord[0][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][1], s->reduction_factor);