diff options
| -rw-r--r-- | libavcodec/jpeg2000dec.c | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index 05e85f4317..546a646668 100644 --- a/libavcodec/jpeg2000dec.c +++ b/libavcodec/jpeg2000dec.c @@ -978,12 +978,11 @@ static int init_tile(Jpeg2000DecoderContext *s, int tileno) comp->coord_o[0][1] = tile->coord[0][1]; comp->coord_o[1][0] = tile->coord[1][0]; comp->coord_o[1][1] = tile->coord[1][1]; - if (compno) { - comp->coord_o[0][0] /= s->cdx[compno]; - comp->coord_o[0][1] /= s->cdx[compno]; - comp->coord_o[1][0] /= s->cdy[compno]; - comp->coord_o[1][1] /= s->cdy[compno]; - } + + comp->coord_o[0][0] = ff_jpeg2000_ceildiv(comp->coord_o[0][0], s->cdx[compno]); + comp->coord_o[0][1] = ff_jpeg2000_ceildiv(comp->coord_o[0][1], s->cdx[compno]); + comp->coord_o[1][0] = ff_jpeg2000_ceildiv(comp->coord_o[1][0], s->cdy[compno]); + comp->coord_o[1][1] = ff_jpeg2000_ceildiv(comp->coord_o[1][1], s->cdy[compno]); 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); @@ -1936,18 +1935,23 @@ static inline void tile_codeblocks(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile float *datap = comp->f_data; \ int32_t *i_datap = comp->i_data; \ int cbps = s->cbps[compno]; \ - int w = tile->comp[compno].coord[0][1] - s->image_offset_x; \ + int w = tile->comp[compno].coord[0][1] - \ + ff_jpeg2000_ceildiv(s->image_offset_x, s->cdx[compno]); \ + int h = tile->comp[compno].coord[1][1] - \ + ff_jpeg2000_ceildiv(s->image_offset_y, s->cdy[compno]); \ int plane = 0; \ \ if (planar) \ plane = s->cdef[compno] ? s->cdef[compno]-1 : (s->ncomponents-1); \ \ - y = tile->comp[compno].coord[1][0] - s->image_offset_y / s->cdy[compno]; \ + y = tile->comp[compno].coord[1][0] - \ + ff_jpeg2000_ceildiv(s->image_offset_y, s->cdy[compno]); \ line = (PIXEL *)picture->data[plane] + y * (picture->linesize[plane] / sizeof(PIXEL));\ - for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y++) { \ + for (; y < h; y++) { \ PIXEL *dst; \ \ - x = tile->comp[compno].coord[0][0] - s->image_offset_x / s->cdx[compno]; \ + x = tile->comp[compno].coord[0][0] - \ + ff_jpeg2000_ceildiv(s->image_offset_x, s->cdx[compno]); \ dst = line + x * pixelsize + compno*!planar; \ \ if (codsty->transform == FF_DWT97) { \ |