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jpeg2000: Speed up jpeg2000_decode_tile()

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Skip processing bands with dimension set to 0.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
This commit is contained in:
Michael Niedermayer 2013-07-01 10:01:33 +02:00 committed by Luca Barbato
parent 64f6570c6e
commit 53d5d89c1b
1 changed files with 4 additions and 0 deletions
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4
libavcodec/jpeg2000dec.c
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@ -1118,6 +1118,10 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
int cblkno = 0, bandpos;
bandpos = bandno + (reslevelno > 0);
if (band->coord[0][0] == band->coord[0][1] ||
band->coord[1][0] == band->coord[1][1])
continue;
nb_precincts = rlevel->num_precincts_x * rlevel->num_precincts_y;
/* Loop on precincts */
for (precno = 0; precno < nb_precincts; precno++) {