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avcodec/mjpegdec: support adob transform 2

Fixes Ticket3426

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-03-11 04:20:23 +01:00
parent e893440a28
commit e161c1bbfc

View File

@ -2092,6 +2092,28 @@ the_end:
}
}
}
if (s->adobe_transform == 2 && s->avctx->pix_fmt == AV_PIX_FMT_YUVA444P) {
int w = s->picture_ptr->width;
int h = s->picture_ptr->height;
for (i=0; i<h; i++) {
int j;
uint8_t *dst[4];
for (index=0; index<4; index++) {
dst[index] = s->picture_ptr->data[index]
+ s->picture_ptr->linesize[index]*i;
}
for (j=0; j<w; j++) {
int k = dst[3][j];
int r = (255 - dst[0][j]) * k;
int g = (128 - dst[1][j]) * k;
int b = (128 - dst[2][j]) * k;
dst[0][j] = r*257 >> 16;
dst[1][j] = (g*257 >> 16) + 128;
dst[2][j] = (b*257 >> 16) + 128;
dst[3][j] = 255;
}
}
}
if (s->stereo3d) {
AVStereo3D *stereo = av_stereo3d_create_side_data(data);