diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2013-07-01 10:01:24 +0200 |
|---|---|---|
| committer | Luca Barbato <lu_zero@gentoo.org> | 2013-07-02 20:05:46 +0200 |
| commit | db13e02c6f0355fabd540e77b61ade127d6411ff (patch) | |
| tree | 9814e435b6ff26cd3b8f0e8e5cf9c321a5d0dd9f /libavcodec/jpeg2000.c | |
| parent | 690c8af97bb1c9a57d5d233a5ef76409ff9b15b2 (diff) | |
| download | ffmpeg-db13e02c6f0355fabd540e77b61ade127d6411ff.tar.gz | |
jpeg2000: Compute corrections of sub-band coordinates
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
Diffstat (limited to 'libavcodec/jpeg2000.c')
| -rw-r--r-- | libavcodec/jpeg2000.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/libavcodec/jpeg2000.c b/libavcodec/jpeg2000.c index 4a16d58baf..66f7bed94b 100644 --- a/libavcodec/jpeg2000.c +++ b/libavcodec/jpeg2000.c @@ -335,9 +335,8 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp, for (i = 0; i < 2; i++) for (j = 0; j < 2; j++) band->coord[i][j] = - ff_jpeg2000_ceildivpow2(comp->coord_o[i][j], + ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] - comp->coord_o[i][0], declvl - 1); - log2_band_prec_width = reslevel->log2_prec_width; log2_band_prec_height = reslevel->log2_prec_height; /* see ISO/IEC 15444-1:2002 eq. B-17 and eq. B-15 */ @@ -352,7 +351,7 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp, for (j = 0; j < 2; j++) /* Formula example for tbx_0 = ceildiv((tcx_0 - 2 ^ (declvl - 1) * x0_b) / declvl) */ band->coord[i][j] = - ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] - + ff_jpeg2000_ceildivpow2(comp->coord_o[i][j] - comp->coord_o[i][0] - (((bandno + 1 >> i) & 1) << declvl - 1), declvl); /* TODO: Manage case of 3 band offsets here or @@ -368,6 +367,11 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp, log2_band_prec_height = reslevel->log2_prec_height - 1; } + for (j = 0; j < 2; j++) + band->coord[0][j] = ff_jpeg2000_ceildiv(band->coord[0][j], dx); + for (j = 0; j < 2; j++) + band->coord[1][j] = ff_jpeg2000_ceildiv(band->coord[1][j], dy); + band->prec = av_malloc_array(reslevel->num_precincts_x * reslevel->num_precincts_y, sizeof(*band->prec)); |