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avcodec/jpeg2000dec: Fix high bit depth branch sample shift

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Fix part of Ticket3619

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-06-08 23:36:59 +02:00
parent 6fdbaa2b7f
commit 028c59c17b
1 changed files with 4 additions and 2 deletions
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6
libavcodec/jpeg2000dec.c
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@ -1284,6 +1284,8 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
}
}
} else {
int precision = picture->format == AV_PIX_FMT_XYZ12 ? 16 : s->precision;
for (compno = 0; compno < s->ncomponents; compno++) {
Jpeg2000Component *comp = tile->comp + compno;
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
@ -1310,7 +1312,7 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
val = av_clip(val, 0, (1 << cbps) - 1);
/* align 12 bit values in little-endian mode */
*dst = val << (16 - cbps);
*dst = val << (precision - cbps);
datap++;
dst += pixelsize;
}
@ -1320,7 +1322,7 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
val = av_clip(val, 0, (1 << cbps) - 1);
/* align 12 bit values in little-endian mode */
*dst = val << (16 - cbps);
*dst = val << (precision - cbps);
i_datap++;
dst += pixelsize;
}