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jpeg2000dec: Support non subsampled 8bit planar pixel formats

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Fixes file2.jp2

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-07-08 00:58:40 +02:00
parent 99de97cabf
commit fc6de70c44
1 changed files with 12 additions and 5 deletions
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17
libavcodec/jpeg2000dec.c
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@ -1245,14 +1245,21 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
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 planar = !!picture->data[2];
int pixelsize = planar ? 1 : s->ncomponents;
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;
line = picture->data[0] + y * picture->linesize[0];
line = picture->data[plane] + y * picture->linesize[plane];
for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
uint8_t *dst;
x = tile->comp[compno].coord[0][0] - s->image_offset_x;
dst = line + x * s->ncomponents + compno;
dst = line + x * pixelsize + compno*!planar;
if (codsty->transform == FF_DWT97) {
for (; x < w; x += s->cdx[compno]) {
@ -1261,7 +1268,7 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
val = av_clip(val, 0, (1 << cbps) - 1);
*dst = val << (8 - cbps);
datap++;
dst += s->ncomponents;
dst += pixelsize;
}
} else {
for (; x < w; x += s->cdx[compno]) {
@ -1270,10 +1277,10 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
val = av_clip(val, 0, (1 << cbps) - 1);
*dst = val << (8 - cbps);
i_datap++;
dst += s->ncomponents;
dst += pixelsize;
}
}
line += picture->linesize[0];
line += picture->linesize[plane];
}
}
} else {