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avcodec/mjpegdec: handle luma upscale detection generically

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-07-01 23:26:19 +02:00
parent 64d98dadc7
commit 784e1cf76b
1 changed files with 6 additions and 2 deletions
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8
libavcodec/mjpegdec.c
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@ -392,6 +392,12 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
int j = 6 + (i&1) - (i&6);
int is = (pix_fmt_id >> (4*i)) & 0xF;
int js = (pix_fmt_id >> (4*j)) & 0xF;
if (is == 1 && js != 2 && (i < 2 || i > 5))
js = (pix_fmt_id >> ( 8 + 4*(i&1))) & 0xF;
if (is == 1 && js != 2 && (i < 2 || i > 5))
js = (pix_fmt_id >> (16 + 4*(i&1))) & 0xF;
if (is == 1 && js == 2) {
if (i & 1) s->upscale_h |= 1 << (j/2);
else s->upscale_v |= 1 << (j/2);
@ -474,8 +480,6 @@ int ff_mjpeg_decode_sof(MJpegDecodeContext *s)
else
goto unk_pixfmt;
s->avctx->color_range = s->cs_itu601 ? AVCOL_RANGE_MPEG : AVCOL_RANGE_JPEG;
s->upscale_v = 1;
s->upscale_h = 1;
s->chroma_height = s->height / 2;
break;
case 0x11000000: