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av_picture_crop(): Support simple cases with packed pixels too.

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This fixes a regression when linked to old ffmpeg.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2011-05-15 22:37:02 +02:00
parent 27614b1217
commit a80f74c584
1 changed files with 9 additions and 1 deletions
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10
libavcodec/imgconvert.c
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@ -790,15 +790,23 @@ int av_picture_crop(AVPicture *dst, const AVPicture *src,
int y_shift;
int x_shift;
if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB || !is_yuv_planar(&pix_fmt_info[pix_fmt]))
if (pix_fmt < 0 || pix_fmt >= PIX_FMT_NB)
return -1;
y_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_h;
x_shift = av_pix_fmt_descriptors[pix_fmt].log2_chroma_w;
if (is_yuv_planar(&pix_fmt_info[pix_fmt])) {
dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
dst->data[1] = src->data[1] + ((top_band >> y_shift) * src->linesize[1]) + (left_band >> x_shift);
dst->data[2] = src->data[2] + ((top_band >> y_shift) * src->linesize[2]) + (left_band >> x_shift);
} else{
if(top_band % (1<<y_shift) || left_band % (1<<x_shift))
return -1;
if(left_band) //FIXME add support for this too
return -1;
dst->data[0] = src->data[0] + (top_band * src->linesize[0]) + left_band;
}
dst->linesize[0] = src->linesize[0];
dst->linesize[1] = src->linesize[1];