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avcodec/mjpegdec: Support AV_PIX_FMT_YUV420P16 with upscale_h

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Fixes assertion failure
Fixes: test42f.jpg
Found-by: Piotr Bandurski <ami_stuff@o2.pl>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit 5c7899a4834ee927f5629e4c02bfa225b846f016)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-08-14 16:19:53 +02:00
parent 35738e5898
commit 10c2d22ba1
1 changed files with 11 additions and 2 deletions
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13
libavcodec/mjpegdec.c
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@ -1894,6 +1894,7 @@ int ff_mjpeg_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
int start_code;
int i, index;
int ret = 0;
int is16bit;
av_dict_free(&s->exif_metadata);
av_freep(&s->stereo3d);
@ -2072,6 +2073,9 @@ fail:
s->got_picture = 0;
return ret;
the_end:
is16bit = av_pix_fmt_desc_get(s->avctx->pix_fmt)->comp[0].step_minus1;
if (s->upscale_h) {
int p;
av_assert0(avctx->pix_fmt == AV_PIX_FMT_YUVJ444P ||
@ -2081,6 +2085,7 @@ the_end:
avctx->pix_fmt == AV_PIX_FMT_YUVA444P ||
avctx->pix_fmt == AV_PIX_FMT_YUVJ420P ||
avctx->pix_fmt == AV_PIX_FMT_YUV420P ||
avctx->pix_fmt == AV_PIX_FMT_YUV420P16||
avctx->pix_fmt == AV_PIX_FMT_GBRAP
);
avcodec_get_chroma_sub_sample(s->avctx->pix_fmt, &hshift, &vshift);
@ -2092,8 +2097,12 @@ the_end:
if (p==1 || p==2)
w >>= hshift;
for (i = 0; i < s->chroma_height; i++) {
for (index = w - 1; index; index--)
line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
for (index = w - 1; index; index--) {
if (is16bit)
((uint16_t*)line)[index] = (((uint16_t*)line)[index / 2] + ((uint16_t*)line)[(index + 1) / 2]) >> 1;
else
line[index] = (line[index / 2] + line[(index + 1) / 2]) >> 1;
}
line += s->linesize[p];
}
}