From 53d5d89c1b7534205e5f825918701dda56d18896 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 1 Jul 2013 10:01:33 +0200 Subject: jpeg2000: Speed up jpeg2000_decode_tile() Skip processing bands with dimension set to 0. Signed-off-by: Luca Barbato --- libavcodec/jpeg2000dec.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'libavcodec/jpeg2000dec.c') diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c index 08c8c4df97..6a300bd8f5 100644 --- a/libavcodec/jpeg2000dec.c +++ b/libavcodec/jpeg2000dec.c @@ -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++) { -- cgit v1.2.3